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mac80211: add new IEEE80211_VIF_GET_NOA_UPDATE flag
[deliverable/linux.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 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(!sdata->u.mgd.associated))
126 return;
127
128 ifmgd->probe_send_count = 0;
129
130 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
131 return;
132
133 mod_timer(&sdata->u.mgd.conn_mon_timer,
134 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
135 }
136
137 static int ecw2cw(int ecw)
138 {
139 return (1 << ecw) - 1;
140 }
141
142 static u32
143 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
144 struct ieee80211_supported_band *sband,
145 struct ieee80211_channel *channel,
146 const struct ieee80211_ht_cap *ht_cap,
147 const struct ieee80211_ht_operation *ht_oper,
148 const struct ieee80211_vht_operation *vht_oper,
149 struct cfg80211_chan_def *chandef, bool tracking)
150 {
151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
152 struct cfg80211_chan_def vht_chandef;
153 struct ieee80211_sta_ht_cap sta_ht_cap;
154 u32 ht_cfreq, ret;
155
156 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
157 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
158
159 chandef->chan = channel;
160 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
161 chandef->center_freq1 = channel->center_freq;
162 chandef->center_freq2 = 0;
163
164 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
165 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
166 goto out;
167 }
168
169 chandef->width = NL80211_CHAN_WIDTH_20;
170
171 if (!(ht_cap->cap_info &
172 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
173 ret = IEEE80211_STA_DISABLE_40MHZ;
174 vht_chandef = *chandef;
175 goto out;
176 }
177
178 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
179 channel->band);
180 /* check that channel matches the right operating channel */
181 if (!tracking && channel->center_freq != ht_cfreq) {
182 /*
183 * It's possible that some APs are confused here;
184 * Netgear WNDR3700 sometimes reports 4 higher than
185 * the actual channel in association responses, but
186 * since we look at probe response/beacon data here
187 * it should be OK.
188 */
189 sdata_info(sdata,
190 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
191 channel->center_freq, ht_cfreq,
192 ht_oper->primary_chan, channel->band);
193 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
194 goto out;
195 }
196
197 /* check 40 MHz support, if we have it */
198 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
199 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
200 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
201 chandef->width = NL80211_CHAN_WIDTH_40;
202 chandef->center_freq1 += 10;
203 break;
204 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
205 chandef->width = NL80211_CHAN_WIDTH_40;
206 chandef->center_freq1 -= 10;
207 break;
208 }
209 } else {
210 /* 40 MHz (and 80 MHz) must be supported for VHT */
211 ret = IEEE80211_STA_DISABLE_VHT;
212 /* also mark 40 MHz disabled */
213 ret |= IEEE80211_STA_DISABLE_40MHZ;
214 goto out;
215 }
216
217 if (!vht_oper || !sband->vht_cap.vht_supported) {
218 ret = IEEE80211_STA_DISABLE_VHT;
219 goto out;
220 }
221
222 vht_chandef.chan = channel;
223 vht_chandef.center_freq1 =
224 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
225 channel->band);
226 vht_chandef.center_freq2 = 0;
227
228 switch (vht_oper->chan_width) {
229 case IEEE80211_VHT_CHANWIDTH_USE_HT:
230 vht_chandef.width = chandef->width;
231 vht_chandef.center_freq1 = chandef->center_freq1;
232 break;
233 case IEEE80211_VHT_CHANWIDTH_80MHZ:
234 vht_chandef.width = NL80211_CHAN_WIDTH_80;
235 break;
236 case IEEE80211_VHT_CHANWIDTH_160MHZ:
237 vht_chandef.width = NL80211_CHAN_WIDTH_160;
238 break;
239 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
240 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
241 vht_chandef.center_freq2 =
242 ieee80211_channel_to_frequency(
243 vht_oper->center_freq_seg2_idx,
244 channel->band);
245 break;
246 default:
247 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
248 sdata_info(sdata,
249 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
250 vht_oper->chan_width);
251 ret = IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 if (!cfg80211_chandef_valid(&vht_chandef)) {
256 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
257 sdata_info(sdata,
258 "AP VHT information is invalid, disable VHT\n");
259 ret = IEEE80211_STA_DISABLE_VHT;
260 goto out;
261 }
262
263 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
264 ret = 0;
265 goto out;
266 }
267
268 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
269 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
270 sdata_info(sdata,
271 "AP VHT information doesn't match HT, disable VHT\n");
272 ret = IEEE80211_STA_DISABLE_VHT;
273 goto out;
274 }
275
276 *chandef = vht_chandef;
277
278 ret = 0;
279
280 out:
281 /*
282 * When tracking the current AP, don't do any further checks if the
283 * new chandef is identical to the one we're currently using for the
284 * connection. This keeps us from playing ping-pong with regulatory,
285 * without it the following can happen (for example):
286 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
287 * - AP advertises regdom US
288 * - CRDA loads regdom US with 80 MHz prohibited (old database)
289 * - the code below detects an unsupported channel, downgrades, and
290 * we disconnect from the AP in the caller
291 * - disconnect causes CRDA to reload world regdomain and the game
292 * starts anew.
293 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
294 *
295 * It seems possible that there are still scenarios with CSA or real
296 * bandwidth changes where a this could happen, but those cases are
297 * less common and wouldn't completely prevent using the AP.
298 */
299 if (tracking &&
300 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
301 return ret;
302
303 /* don't print the message below for VHT mismatch if VHT is disabled */
304 if (ret & IEEE80211_STA_DISABLE_VHT)
305 vht_chandef = *chandef;
306
307 /*
308 * Ignore the DISABLED flag when we're already connected and only
309 * tracking the APs beacon for bandwidth changes - otherwise we
310 * might get disconnected here if we connect to an AP, update our
311 * regulatory information based on the AP's country IE and the
312 * information we have is wrong/outdated and disables the channel
313 * that we're actually using for the connection to the AP.
314 */
315 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
316 tracking ? 0 :
317 IEEE80211_CHAN_DISABLED)) {
318 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
319 ret = IEEE80211_STA_DISABLE_HT |
320 IEEE80211_STA_DISABLE_VHT;
321 break;
322 }
323
324 ret |= ieee80211_chandef_downgrade(chandef);
325 }
326
327 if (chandef->width != vht_chandef.width && !tracking)
328 sdata_info(sdata,
329 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
330
331 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
332 return ret;
333 }
334
335 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
336 struct sta_info *sta,
337 const struct ieee80211_ht_cap *ht_cap,
338 const struct ieee80211_ht_operation *ht_oper,
339 const struct ieee80211_vht_operation *vht_oper,
340 const u8 *bssid, u32 *changed)
341 {
342 struct ieee80211_local *local = sdata->local;
343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
344 struct ieee80211_supported_band *sband;
345 struct ieee80211_channel *chan;
346 struct cfg80211_chan_def chandef;
347 u16 ht_opmode;
348 u32 flags;
349 enum ieee80211_sta_rx_bandwidth new_sta_bw;
350 int ret;
351
352 /* if HT was/is disabled, don't track any bandwidth changes */
353 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
354 return 0;
355
356 /* don't check VHT if we associated as non-VHT station */
357 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
358 vht_oper = NULL;
359
360 if (WARN_ON_ONCE(!sta))
361 return -EINVAL;
362
363 /*
364 * if bss configuration changed store the new one -
365 * this may be applicable even if channel is identical
366 */
367 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
368 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
369 *changed |= BSS_CHANGED_HT;
370 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
371 }
372
373 chan = sdata->vif.bss_conf.chandef.chan;
374 sband = local->hw.wiphy->bands[chan->band];
375
376 /* calculate new channel (type) based on HT/VHT operation IEs */
377 flags = ieee80211_determine_chantype(sdata, sband, chan,
378 ht_cap, ht_oper, vht_oper,
379 &chandef, true);
380
381 /*
382 * Downgrade the new channel if we associated with restricted
383 * capabilities. For example, if we associated as a 20 MHz STA
384 * to a 40 MHz AP (due to regulatory, capabilities or config
385 * reasons) then switching to a 40 MHz channel now won't do us
386 * any good -- we couldn't use it with the AP.
387 */
388 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
389 chandef.width == NL80211_CHAN_WIDTH_80P80)
390 flags |= ieee80211_chandef_downgrade(&chandef);
391 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
392 chandef.width == NL80211_CHAN_WIDTH_160)
393 flags |= ieee80211_chandef_downgrade(&chandef);
394 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
395 chandef.width > NL80211_CHAN_WIDTH_20)
396 flags |= ieee80211_chandef_downgrade(&chandef);
397
398 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
399 return 0;
400
401 sdata_info(sdata,
402 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
403 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
404 chandef.center_freq1, chandef.center_freq2);
405
406 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
407 IEEE80211_STA_DISABLE_VHT |
408 IEEE80211_STA_DISABLE_40MHZ |
409 IEEE80211_STA_DISABLE_80P80MHZ |
410 IEEE80211_STA_DISABLE_160MHZ)) ||
411 !cfg80211_chandef_valid(&chandef)) {
412 sdata_info(sdata,
413 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
414 ifmgd->bssid);
415 return -EINVAL;
416 }
417
418 switch (chandef.width) {
419 case NL80211_CHAN_WIDTH_20_NOHT:
420 case NL80211_CHAN_WIDTH_20:
421 new_sta_bw = IEEE80211_STA_RX_BW_20;
422 break;
423 case NL80211_CHAN_WIDTH_40:
424 new_sta_bw = IEEE80211_STA_RX_BW_40;
425 break;
426 case NL80211_CHAN_WIDTH_80:
427 new_sta_bw = IEEE80211_STA_RX_BW_80;
428 break;
429 case NL80211_CHAN_WIDTH_80P80:
430 case NL80211_CHAN_WIDTH_160:
431 new_sta_bw = IEEE80211_STA_RX_BW_160;
432 break;
433 default:
434 return -EINVAL;
435 }
436
437 if (new_sta_bw > sta->cur_max_bandwidth)
438 new_sta_bw = sta->cur_max_bandwidth;
439
440 if (new_sta_bw < sta->sta.bandwidth) {
441 sta->sta.bandwidth = new_sta_bw;
442 rate_control_rate_update(local, sband, sta,
443 IEEE80211_RC_BW_CHANGED);
444 }
445
446 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
447 if (ret) {
448 sdata_info(sdata,
449 "AP %pM changed bandwidth to incompatible one - disconnect\n",
450 ifmgd->bssid);
451 return ret;
452 }
453
454 if (new_sta_bw > sta->sta.bandwidth) {
455 sta->sta.bandwidth = new_sta_bw;
456 rate_control_rate_update(local, sband, sta,
457 IEEE80211_RC_BW_CHANGED);
458 }
459
460 return 0;
461 }
462
463 /* frame sending functions */
464
465 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
466 struct sk_buff *skb, u8 ap_ht_param,
467 struct ieee80211_supported_band *sband,
468 struct ieee80211_channel *channel,
469 enum ieee80211_smps_mode smps)
470 {
471 u8 *pos;
472 u32 flags = channel->flags;
473 u16 cap;
474 struct ieee80211_sta_ht_cap ht_cap;
475
476 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
477
478 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
479 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
480
481 /* determine capability flags */
482 cap = ht_cap.cap;
483
484 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
485 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
486 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
487 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
488 cap &= ~IEEE80211_HT_CAP_SGI_40;
489 }
490 break;
491 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
492 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
494 cap &= ~IEEE80211_HT_CAP_SGI_40;
495 }
496 break;
497 }
498
499 /*
500 * If 40 MHz was disabled associate as though we weren't
501 * capable of 40 MHz -- some broken APs will never fall
502 * back to trying to transmit in 20 MHz.
503 */
504 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
505 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
506 cap &= ~IEEE80211_HT_CAP_SGI_40;
507 }
508
509 /* set SM PS mode properly */
510 cap &= ~IEEE80211_HT_CAP_SM_PS;
511 switch (smps) {
512 case IEEE80211_SMPS_AUTOMATIC:
513 case IEEE80211_SMPS_NUM_MODES:
514 WARN_ON(1);
515 case IEEE80211_SMPS_OFF:
516 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
517 IEEE80211_HT_CAP_SM_PS_SHIFT;
518 break;
519 case IEEE80211_SMPS_STATIC:
520 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
521 IEEE80211_HT_CAP_SM_PS_SHIFT;
522 break;
523 case IEEE80211_SMPS_DYNAMIC:
524 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
525 IEEE80211_HT_CAP_SM_PS_SHIFT;
526 break;
527 }
528
529 /* reserve and fill IE */
530 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
531 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
532 }
533
534 /* This function determines vht capability flags for the association
535 * and builds the IE.
536 * Note - the function may set the owner of the MU-MIMO capability
537 */
538 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
539 struct sk_buff *skb,
540 struct ieee80211_supported_band *sband,
541 struct ieee80211_vht_cap *ap_vht_cap)
542 {
543 struct ieee80211_local *local = sdata->local;
544 u8 *pos;
545 u32 cap;
546 struct ieee80211_sta_vht_cap vht_cap;
547 u32 mask, ap_bf_sts, our_bf_sts;
548
549 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
550
551 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
552 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
553
554 /* determine capability flags */
555 cap = vht_cap.cap;
556
557 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
558 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
559
560 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
562 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
563 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
564 }
565
566 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
567 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
568 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
569 }
570
571 /*
572 * Some APs apparently get confused if our capabilities are better
573 * than theirs, so restrict what we advertise in the assoc request.
574 */
575 if (!(ap_vht_cap->vht_cap_info &
576 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
577 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
578 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
579 else if (!(ap_vht_cap->vht_cap_info &
580 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
581 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
582
583 /*
584 * If some other vif is using the MU-MIMO capablity we cannot associate
585 * using MU-MIMO - this will lead to contradictions in the group-id
586 * mechanism.
587 * Ownership is defined since association request, in order to avoid
588 * simultaneous associations with MU-MIMO.
589 */
590 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
591 bool disable_mu_mimo = false;
592 struct ieee80211_sub_if_data *other;
593
594 list_for_each_entry_rcu(other, &local->interfaces, list) {
595 if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
596 disable_mu_mimo = true;
597 break;
598 }
599 }
600 if (disable_mu_mimo)
601 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
602 else
603 sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
604 }
605
606 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
607
608 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
609 our_bf_sts = cap & mask;
610
611 if (ap_bf_sts < our_bf_sts) {
612 cap &= ~mask;
613 cap |= ap_bf_sts;
614 }
615
616 /* reserve and fill IE */
617 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
618 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
619 }
620
621 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
622 {
623 struct ieee80211_local *local = sdata->local;
624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
625 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
626 struct sk_buff *skb;
627 struct ieee80211_mgmt *mgmt;
628 u8 *pos, qos_info;
629 size_t offset = 0, noffset;
630 int i, count, rates_len, supp_rates_len, shift;
631 u16 capab;
632 struct ieee80211_supported_band *sband;
633 struct ieee80211_chanctx_conf *chanctx_conf;
634 struct ieee80211_channel *chan;
635 u32 rate_flags, rates = 0;
636
637 sdata_assert_lock(sdata);
638
639 rcu_read_lock();
640 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
641 if (WARN_ON(!chanctx_conf)) {
642 rcu_read_unlock();
643 return;
644 }
645 chan = chanctx_conf->def.chan;
646 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
647 rcu_read_unlock();
648 sband = local->hw.wiphy->bands[chan->band];
649 shift = ieee80211_vif_get_shift(&sdata->vif);
650
651 if (assoc_data->supp_rates_len) {
652 /*
653 * Get all rates supported by the device and the AP as
654 * some APs don't like getting a superset of their rates
655 * in the association request (e.g. D-Link DAP 1353 in
656 * b-only mode)...
657 */
658 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
659 assoc_data->supp_rates,
660 assoc_data->supp_rates_len,
661 &rates);
662 } else {
663 /*
664 * In case AP not provide any supported rates information
665 * before association, we send information element(s) with
666 * all rates that we support.
667 */
668 rates_len = 0;
669 for (i = 0; i < sband->n_bitrates; i++) {
670 if ((rate_flags & sband->bitrates[i].flags)
671 != rate_flags)
672 continue;
673 rates |= BIT(i);
674 rates_len++;
675 }
676 }
677
678 skb = alloc_skb(local->hw.extra_tx_headroom +
679 sizeof(*mgmt) + /* bit too much but doesn't matter */
680 2 + assoc_data->ssid_len + /* SSID */
681 4 + rates_len + /* (extended) rates */
682 4 + /* power capability */
683 2 + 2 * sband->n_channels + /* supported channels */
684 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
685 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
686 assoc_data->ie_len + /* extra IEs */
687 9, /* WMM */
688 GFP_KERNEL);
689 if (!skb)
690 return;
691
692 skb_reserve(skb, local->hw.extra_tx_headroom);
693
694 capab = WLAN_CAPABILITY_ESS;
695
696 if (sband->band == IEEE80211_BAND_2GHZ) {
697 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
698 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
699 }
700
701 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
702 capab |= WLAN_CAPABILITY_PRIVACY;
703
704 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
705 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
706 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
707
708 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
709 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
710
711 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
712 memset(mgmt, 0, 24);
713 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
714 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
715 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
716
717 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
718 skb_put(skb, 10);
719 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
720 IEEE80211_STYPE_REASSOC_REQ);
721 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
722 mgmt->u.reassoc_req.listen_interval =
723 cpu_to_le16(local->hw.conf.listen_interval);
724 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
725 ETH_ALEN);
726 } else {
727 skb_put(skb, 4);
728 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
729 IEEE80211_STYPE_ASSOC_REQ);
730 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
731 mgmt->u.assoc_req.listen_interval =
732 cpu_to_le16(local->hw.conf.listen_interval);
733 }
734
735 /* SSID */
736 pos = skb_put(skb, 2 + assoc_data->ssid_len);
737 *pos++ = WLAN_EID_SSID;
738 *pos++ = assoc_data->ssid_len;
739 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
740
741 /* add all rates which were marked to be used above */
742 supp_rates_len = rates_len;
743 if (supp_rates_len > 8)
744 supp_rates_len = 8;
745
746 pos = skb_put(skb, supp_rates_len + 2);
747 *pos++ = WLAN_EID_SUPP_RATES;
748 *pos++ = supp_rates_len;
749
750 count = 0;
751 for (i = 0; i < sband->n_bitrates; i++) {
752 if (BIT(i) & rates) {
753 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
754 5 * (1 << shift));
755 *pos++ = (u8) rate;
756 if (++count == 8)
757 break;
758 }
759 }
760
761 if (rates_len > count) {
762 pos = skb_put(skb, rates_len - count + 2);
763 *pos++ = WLAN_EID_EXT_SUPP_RATES;
764 *pos++ = rates_len - count;
765
766 for (i++; i < sband->n_bitrates; i++) {
767 if (BIT(i) & rates) {
768 int rate;
769 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
770 5 * (1 << shift));
771 *pos++ = (u8) rate;
772 }
773 }
774 }
775
776 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
777 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
778 pos = skb_put(skb, 4);
779 *pos++ = WLAN_EID_PWR_CAPABILITY;
780 *pos++ = 2;
781 *pos++ = 0; /* min tx power */
782 /* max tx power */
783 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
784 }
785
786 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
787 /* TODO: get this in reg domain format */
788 pos = skb_put(skb, 2 * sband->n_channels + 2);
789 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
790 *pos++ = 2 * sband->n_channels;
791 for (i = 0; i < sband->n_channels; i++) {
792 *pos++ = ieee80211_frequency_to_channel(
793 sband->channels[i].center_freq);
794 *pos++ = 1; /* one channel in the subband*/
795 }
796 }
797
798 /* if present, add any custom IEs that go before HT */
799 if (assoc_data->ie_len) {
800 static const u8 before_ht[] = {
801 WLAN_EID_SSID,
802 WLAN_EID_SUPP_RATES,
803 WLAN_EID_EXT_SUPP_RATES,
804 WLAN_EID_PWR_CAPABILITY,
805 WLAN_EID_SUPPORTED_CHANNELS,
806 WLAN_EID_RSN,
807 WLAN_EID_QOS_CAPA,
808 WLAN_EID_RRM_ENABLED_CAPABILITIES,
809 WLAN_EID_MOBILITY_DOMAIN,
810 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
811 WLAN_EID_RIC_DATA, /* reassoc only */
812 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
813 };
814 static const u8 after_ric[] = {
815 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
816 WLAN_EID_HT_CAPABILITY,
817 WLAN_EID_BSS_COEX_2040,
818 WLAN_EID_EXT_CAPABILITY,
819 WLAN_EID_QOS_TRAFFIC_CAPA,
820 WLAN_EID_TIM_BCAST_REQ,
821 WLAN_EID_INTERWORKING,
822 /* 60GHz doesn't happen right now */
823 WLAN_EID_VHT_CAPABILITY,
824 WLAN_EID_OPMODE_NOTIF,
825 };
826
827 noffset = ieee80211_ie_split_ric(assoc_data->ie,
828 assoc_data->ie_len,
829 before_ht,
830 ARRAY_SIZE(before_ht),
831 after_ric,
832 ARRAY_SIZE(after_ric),
833 offset);
834 pos = skb_put(skb, noffset - offset);
835 memcpy(pos, assoc_data->ie + offset, noffset - offset);
836 offset = noffset;
837 }
838
839 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
840 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
841 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
842
843 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
844 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
845 sband, chan, sdata->smps_mode);
846
847 /* if present, add any custom IEs that go before VHT */
848 if (assoc_data->ie_len) {
849 static const u8 before_vht[] = {
850 WLAN_EID_SSID,
851 WLAN_EID_SUPP_RATES,
852 WLAN_EID_EXT_SUPP_RATES,
853 WLAN_EID_PWR_CAPABILITY,
854 WLAN_EID_SUPPORTED_CHANNELS,
855 WLAN_EID_RSN,
856 WLAN_EID_QOS_CAPA,
857 WLAN_EID_RRM_ENABLED_CAPABILITIES,
858 WLAN_EID_MOBILITY_DOMAIN,
859 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
860 WLAN_EID_HT_CAPABILITY,
861 WLAN_EID_BSS_COEX_2040,
862 WLAN_EID_EXT_CAPABILITY,
863 WLAN_EID_QOS_TRAFFIC_CAPA,
864 WLAN_EID_TIM_BCAST_REQ,
865 WLAN_EID_INTERWORKING,
866 };
867
868 /* RIC already taken above, so no need to handle here anymore */
869 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
870 before_vht, ARRAY_SIZE(before_vht),
871 offset);
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
874 offset = noffset;
875 }
876
877 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
878 ieee80211_add_vht_ie(sdata, skb, sband,
879 &assoc_data->ap_vht_cap);
880
881 /* if present, add any custom non-vendor IEs that go after HT */
882 if (assoc_data->ie_len) {
883 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
884 assoc_data->ie_len,
885 offset);
886 pos = skb_put(skb, noffset - offset);
887 memcpy(pos, assoc_data->ie + offset, noffset - offset);
888 offset = noffset;
889 }
890
891 if (assoc_data->wmm) {
892 if (assoc_data->uapsd) {
893 qos_info = ifmgd->uapsd_queues;
894 qos_info |= (ifmgd->uapsd_max_sp_len <<
895 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
896 } else {
897 qos_info = 0;
898 }
899
900 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
901 }
902
903 /* add any remaining custom (i.e. vendor specific here) IEs */
904 if (assoc_data->ie_len) {
905 noffset = assoc_data->ie_len;
906 pos = skb_put(skb, noffset - offset);
907 memcpy(pos, assoc_data->ie + offset, noffset - offset);
908 }
909
910 drv_mgd_prepare_tx(local, sdata);
911
912 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
913 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
914 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
915 IEEE80211_TX_INTFL_MLME_CONN_TX;
916 ieee80211_tx_skb(sdata, skb);
917 }
918
919 void ieee80211_send_pspoll(struct ieee80211_local *local,
920 struct ieee80211_sub_if_data *sdata)
921 {
922 struct ieee80211_pspoll *pspoll;
923 struct sk_buff *skb;
924
925 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
926 if (!skb)
927 return;
928
929 pspoll = (struct ieee80211_pspoll *) skb->data;
930 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
931
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
933 ieee80211_tx_skb(sdata, skb);
934 }
935
936 void ieee80211_send_nullfunc(struct ieee80211_local *local,
937 struct ieee80211_sub_if_data *sdata,
938 bool powersave)
939 {
940 struct sk_buff *skb;
941 struct ieee80211_hdr_3addr *nullfunc;
942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
943
944 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
945 if (!skb)
946 return;
947
948 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
949 if (powersave)
950 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
951
952 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
953 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
954
955 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
956 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
957
958 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
959 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
960
961 ieee80211_tx_skb(sdata, skb);
962 }
963
964 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
965 struct ieee80211_sub_if_data *sdata)
966 {
967 struct sk_buff *skb;
968 struct ieee80211_hdr *nullfunc;
969 __le16 fc;
970
971 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
972 return;
973
974 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
975 if (!skb)
976 return;
977
978 skb_reserve(skb, local->hw.extra_tx_headroom);
979
980 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
981 memset(nullfunc, 0, 30);
982 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
983 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
984 nullfunc->frame_control = fc;
985 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
986 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
987 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
988 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
989
990 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
991 ieee80211_tx_skb(sdata, skb);
992 }
993
994 /* spectrum management related things */
995 static void ieee80211_chswitch_work(struct work_struct *work)
996 {
997 struct ieee80211_sub_if_data *sdata =
998 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
999 struct ieee80211_local *local = sdata->local;
1000 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1001 int ret;
1002
1003 if (!ieee80211_sdata_running(sdata))
1004 return;
1005
1006 sdata_lock(sdata);
1007 mutex_lock(&local->mtx);
1008 mutex_lock(&local->chanctx_mtx);
1009
1010 if (!ifmgd->associated)
1011 goto out;
1012
1013 if (!sdata->vif.csa_active)
1014 goto out;
1015
1016 /*
1017 * using reservation isn't immediate as it may be deferred until later
1018 * with multi-vif. once reservation is complete it will re-schedule the
1019 * work with no reserved_chanctx so verify chandef to check if it
1020 * completed successfully
1021 */
1022
1023 if (sdata->reserved_chanctx) {
1024 /*
1025 * with multi-vif csa driver may call ieee80211_csa_finish()
1026 * many times while waiting for other interfaces to use their
1027 * reservations
1028 */
1029 if (sdata->reserved_ready)
1030 goto out;
1031
1032 ret = ieee80211_vif_use_reserved_context(sdata);
1033 if (ret) {
1034 sdata_info(sdata,
1035 "failed to use reserved channel context, disconnecting (err=%d)\n",
1036 ret);
1037 ieee80211_queue_work(&sdata->local->hw,
1038 &ifmgd->csa_connection_drop_work);
1039 goto out;
1040 }
1041
1042 goto out;
1043 }
1044
1045 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1046 &sdata->csa_chandef)) {
1047 sdata_info(sdata,
1048 "failed to finalize channel switch, disconnecting\n");
1049 ieee80211_queue_work(&sdata->local->hw,
1050 &ifmgd->csa_connection_drop_work);
1051 goto out;
1052 }
1053
1054 /* XXX: shouldn't really modify cfg80211-owned data! */
1055 ifmgd->associated->channel = sdata->csa_chandef.chan;
1056
1057 ifmgd->csa_waiting_bcn = true;
1058
1059 ieee80211_sta_reset_beacon_monitor(sdata);
1060 ieee80211_sta_reset_conn_monitor(sdata);
1061
1062 out:
1063 mutex_unlock(&local->chanctx_mtx);
1064 mutex_unlock(&local->mtx);
1065 sdata_unlock(sdata);
1066 }
1067
1068 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1069 {
1070 struct ieee80211_local *local = sdata->local;
1071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1072 int ret;
1073
1074 sdata_assert_lock(sdata);
1075
1076 WARN_ON(!sdata->vif.csa_active);
1077
1078 if (sdata->csa_block_tx) {
1079 ieee80211_wake_vif_queues(local, sdata,
1080 IEEE80211_QUEUE_STOP_REASON_CSA);
1081 sdata->csa_block_tx = false;
1082 }
1083
1084 sdata->vif.csa_active = false;
1085 ifmgd->csa_waiting_bcn = false;
1086
1087 ret = drv_post_channel_switch(sdata);
1088 if (ret) {
1089 sdata_info(sdata,
1090 "driver post channel switch failed, disconnecting\n");
1091 ieee80211_queue_work(&local->hw,
1092 &ifmgd->csa_connection_drop_work);
1093 return;
1094 }
1095
1096 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1097 }
1098
1099 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1100 {
1101 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1103
1104 trace_api_chswitch_done(sdata, success);
1105 if (!success) {
1106 sdata_info(sdata,
1107 "driver channel switch failed, disconnecting\n");
1108 ieee80211_queue_work(&sdata->local->hw,
1109 &ifmgd->csa_connection_drop_work);
1110 } else {
1111 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1112 }
1113 }
1114 EXPORT_SYMBOL(ieee80211_chswitch_done);
1115
1116 static void ieee80211_chswitch_timer(unsigned long data)
1117 {
1118 struct ieee80211_sub_if_data *sdata =
1119 (struct ieee80211_sub_if_data *) data;
1120
1121 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1122 }
1123
1124 static void
1125 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1126 u64 timestamp, u32 device_timestamp,
1127 struct ieee802_11_elems *elems,
1128 bool beacon)
1129 {
1130 struct ieee80211_local *local = sdata->local;
1131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1132 struct cfg80211_bss *cbss = ifmgd->associated;
1133 struct ieee80211_chanctx_conf *conf;
1134 struct ieee80211_chanctx *chanctx;
1135 enum ieee80211_band current_band;
1136 struct ieee80211_csa_ie csa_ie;
1137 struct ieee80211_channel_switch ch_switch;
1138 int res;
1139
1140 sdata_assert_lock(sdata);
1141
1142 if (!cbss)
1143 return;
1144
1145 if (local->scanning)
1146 return;
1147
1148 /* disregard subsequent announcements if we are already processing */
1149 if (sdata->vif.csa_active)
1150 return;
1151
1152 current_band = cbss->channel->band;
1153 memset(&csa_ie, 0, sizeof(csa_ie));
1154 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1155 ifmgd->flags,
1156 ifmgd->associated->bssid, &csa_ie);
1157 if (res < 0)
1158 ieee80211_queue_work(&local->hw,
1159 &ifmgd->csa_connection_drop_work);
1160 if (res)
1161 return;
1162
1163 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1164 IEEE80211_CHAN_DISABLED)) {
1165 sdata_info(sdata,
1166 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1167 ifmgd->associated->bssid,
1168 csa_ie.chandef.chan->center_freq,
1169 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1170 csa_ie.chandef.center_freq2);
1171 ieee80211_queue_work(&local->hw,
1172 &ifmgd->csa_connection_drop_work);
1173 return;
1174 }
1175
1176 if (cfg80211_chandef_identical(&csa_ie.chandef,
1177 &sdata->vif.bss_conf.chandef)) {
1178 if (ifmgd->csa_ignored_same_chan)
1179 return;
1180 sdata_info(sdata,
1181 "AP %pM tries to chanswitch to same channel, ignore\n",
1182 ifmgd->associated->bssid);
1183 ifmgd->csa_ignored_same_chan = true;
1184 return;
1185 }
1186
1187 /*
1188 * Drop all TDLS peers - either we disconnect or move to a different
1189 * channel from this point on. There's no telling what our peer will do.
1190 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1191 * have an incompatible wider chandef.
1192 */
1193 ieee80211_teardown_tdls_peers(sdata);
1194
1195 mutex_lock(&local->mtx);
1196 mutex_lock(&local->chanctx_mtx);
1197 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1198 lockdep_is_held(&local->chanctx_mtx));
1199 if (!conf) {
1200 sdata_info(sdata,
1201 "no channel context assigned to vif?, disconnecting\n");
1202 goto drop_connection;
1203 }
1204
1205 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1206
1207 if (local->use_chanctx &&
1208 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1209 sdata_info(sdata,
1210 "driver doesn't support chan-switch with channel contexts\n");
1211 goto drop_connection;
1212 }
1213
1214 ch_switch.timestamp = timestamp;
1215 ch_switch.device_timestamp = device_timestamp;
1216 ch_switch.block_tx = csa_ie.mode;
1217 ch_switch.chandef = csa_ie.chandef;
1218 ch_switch.count = csa_ie.count;
1219
1220 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1221 sdata_info(sdata,
1222 "preparing for channel switch failed, disconnecting\n");
1223 goto drop_connection;
1224 }
1225
1226 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1227 chanctx->mode, false);
1228 if (res) {
1229 sdata_info(sdata,
1230 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1231 res);
1232 goto drop_connection;
1233 }
1234 mutex_unlock(&local->chanctx_mtx);
1235
1236 sdata->vif.csa_active = true;
1237 sdata->csa_chandef = csa_ie.chandef;
1238 sdata->csa_block_tx = csa_ie.mode;
1239 ifmgd->csa_ignored_same_chan = false;
1240
1241 if (sdata->csa_block_tx)
1242 ieee80211_stop_vif_queues(local, sdata,
1243 IEEE80211_QUEUE_STOP_REASON_CSA);
1244 mutex_unlock(&local->mtx);
1245
1246 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1247 csa_ie.count);
1248
1249 if (local->ops->channel_switch) {
1250 /* use driver's channel switch callback */
1251 drv_channel_switch(local, sdata, &ch_switch);
1252 return;
1253 }
1254
1255 /* channel switch handled in software */
1256 if (csa_ie.count <= 1)
1257 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1258 else
1259 mod_timer(&ifmgd->chswitch_timer,
1260 TU_TO_EXP_TIME((csa_ie.count - 1) *
1261 cbss->beacon_interval));
1262 return;
1263 drop_connection:
1264 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1265 mutex_unlock(&local->chanctx_mtx);
1266 mutex_unlock(&local->mtx);
1267 }
1268
1269 static bool
1270 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1271 struct ieee80211_channel *channel,
1272 const u8 *country_ie, u8 country_ie_len,
1273 const u8 *pwr_constr_elem,
1274 int *chan_pwr, int *pwr_reduction)
1275 {
1276 struct ieee80211_country_ie_triplet *triplet;
1277 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1278 int i, chan_increment;
1279 bool have_chan_pwr = false;
1280
1281 /* Invalid IE */
1282 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1283 return false;
1284
1285 triplet = (void *)(country_ie + 3);
1286 country_ie_len -= 3;
1287
1288 switch (channel->band) {
1289 default:
1290 WARN_ON_ONCE(1);
1291 /* fall through */
1292 case IEEE80211_BAND_2GHZ:
1293 case IEEE80211_BAND_60GHZ:
1294 chan_increment = 1;
1295 break;
1296 case IEEE80211_BAND_5GHZ:
1297 chan_increment = 4;
1298 break;
1299 }
1300
1301 /* find channel */
1302 while (country_ie_len >= 3) {
1303 u8 first_channel = triplet->chans.first_channel;
1304
1305 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1306 goto next;
1307
1308 for (i = 0; i < triplet->chans.num_channels; i++) {
1309 if (first_channel + i * chan_increment == chan) {
1310 have_chan_pwr = true;
1311 *chan_pwr = triplet->chans.max_power;
1312 break;
1313 }
1314 }
1315 if (have_chan_pwr)
1316 break;
1317
1318 next:
1319 triplet++;
1320 country_ie_len -= 3;
1321 }
1322
1323 if (have_chan_pwr && pwr_constr_elem)
1324 *pwr_reduction = *pwr_constr_elem;
1325 else
1326 *pwr_reduction = 0;
1327
1328 return have_chan_pwr;
1329 }
1330
1331 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1332 struct ieee80211_channel *channel,
1333 const u8 *cisco_dtpc_ie,
1334 int *pwr_level)
1335 {
1336 /* From practical testing, the first data byte of the DTPC element
1337 * seems to contain the requested dBm level, and the CLI on Cisco
1338 * APs clearly state the range is -127 to 127 dBm, which indicates
1339 * a signed byte, although it seemingly never actually goes negative.
1340 * The other byte seems to always be zero.
1341 */
1342 *pwr_level = (__s8)cisco_dtpc_ie[4];
1343 }
1344
1345 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1346 struct ieee80211_channel *channel,
1347 struct ieee80211_mgmt *mgmt,
1348 const u8 *country_ie, u8 country_ie_len,
1349 const u8 *pwr_constr_ie,
1350 const u8 *cisco_dtpc_ie)
1351 {
1352 bool has_80211h_pwr = false, has_cisco_pwr = false;
1353 int chan_pwr = 0, pwr_reduction_80211h = 0;
1354 int pwr_level_cisco, pwr_level_80211h;
1355 int new_ap_level;
1356 __le16 capab = mgmt->u.probe_resp.capab_info;
1357
1358 if (country_ie &&
1359 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1360 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1361 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1362 sdata, channel, country_ie, country_ie_len,
1363 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1364 pwr_level_80211h =
1365 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1366 }
1367
1368 if (cisco_dtpc_ie) {
1369 ieee80211_find_cisco_dtpc(
1370 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1371 has_cisco_pwr = true;
1372 }
1373
1374 if (!has_80211h_pwr && !has_cisco_pwr)
1375 return 0;
1376
1377 /* If we have both 802.11h and Cisco DTPC, apply both limits
1378 * by picking the smallest of the two power levels advertised.
1379 */
1380 if (has_80211h_pwr &&
1381 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1382 sdata_dbg(sdata,
1383 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1384 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1385 sdata->u.mgd.bssid);
1386 new_ap_level = pwr_level_80211h;
1387 } else { /* has_cisco_pwr is always true here. */
1388 sdata_dbg(sdata,
1389 "Limiting TX power to %d dBm as advertised by %pM\n",
1390 pwr_level_cisco, sdata->u.mgd.bssid);
1391 new_ap_level = pwr_level_cisco;
1392 }
1393
1394 if (sdata->ap_power_level == new_ap_level)
1395 return 0;
1396
1397 sdata->ap_power_level = new_ap_level;
1398 if (__ieee80211_recalc_txpower(sdata))
1399 return BSS_CHANGED_TXPOWER;
1400 return 0;
1401 }
1402
1403 /* powersave */
1404 static void ieee80211_enable_ps(struct ieee80211_local *local,
1405 struct ieee80211_sub_if_data *sdata)
1406 {
1407 struct ieee80211_conf *conf = &local->hw.conf;
1408
1409 /*
1410 * If we are scanning right now then the parameters will
1411 * take effect when scan finishes.
1412 */
1413 if (local->scanning)
1414 return;
1415
1416 if (conf->dynamic_ps_timeout > 0 &&
1417 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1418 mod_timer(&local->dynamic_ps_timer, jiffies +
1419 msecs_to_jiffies(conf->dynamic_ps_timeout));
1420 } else {
1421 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1422 ieee80211_send_nullfunc(local, sdata, true);
1423
1424 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1425 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1426 return;
1427
1428 conf->flags |= IEEE80211_CONF_PS;
1429 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1430 }
1431 }
1432
1433 static void ieee80211_change_ps(struct ieee80211_local *local)
1434 {
1435 struct ieee80211_conf *conf = &local->hw.conf;
1436
1437 if (local->ps_sdata) {
1438 ieee80211_enable_ps(local, local->ps_sdata);
1439 } else if (conf->flags & IEEE80211_CONF_PS) {
1440 conf->flags &= ~IEEE80211_CONF_PS;
1441 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1442 del_timer_sync(&local->dynamic_ps_timer);
1443 cancel_work_sync(&local->dynamic_ps_enable_work);
1444 }
1445 }
1446
1447 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1448 {
1449 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1450 struct sta_info *sta = NULL;
1451 bool authorized = false;
1452
1453 if (!mgd->powersave)
1454 return false;
1455
1456 if (mgd->broken_ap)
1457 return false;
1458
1459 if (!mgd->associated)
1460 return false;
1461
1462 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1463 return false;
1464
1465 if (!mgd->have_beacon)
1466 return false;
1467
1468 rcu_read_lock();
1469 sta = sta_info_get(sdata, mgd->bssid);
1470 if (sta)
1471 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1472 rcu_read_unlock();
1473
1474 return authorized;
1475 }
1476
1477 /* need to hold RTNL or interface lock */
1478 void ieee80211_recalc_ps(struct ieee80211_local *local)
1479 {
1480 struct ieee80211_sub_if_data *sdata, *found = NULL;
1481 int count = 0;
1482 int timeout;
1483
1484 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1485 local->ps_sdata = NULL;
1486 return;
1487 }
1488
1489 list_for_each_entry(sdata, &local->interfaces, list) {
1490 if (!ieee80211_sdata_running(sdata))
1491 continue;
1492 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1493 /* If an AP vif is found, then disable PS
1494 * by setting the count to zero thereby setting
1495 * ps_sdata to NULL.
1496 */
1497 count = 0;
1498 break;
1499 }
1500 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1501 continue;
1502 found = sdata;
1503 count++;
1504 }
1505
1506 if (count == 1 && ieee80211_powersave_allowed(found)) {
1507 u8 dtimper = found->u.mgd.dtim_period;
1508 s32 beaconint_us;
1509
1510 beaconint_us = ieee80211_tu_to_usec(
1511 found->vif.bss_conf.beacon_int);
1512
1513 timeout = local->dynamic_ps_forced_timeout;
1514 if (timeout < 0)
1515 timeout = 100;
1516 local->hw.conf.dynamic_ps_timeout = timeout;
1517
1518 /* If the TIM IE is invalid, pretend the value is 1 */
1519 if (!dtimper)
1520 dtimper = 1;
1521
1522 local->hw.conf.ps_dtim_period = dtimper;
1523 local->ps_sdata = found;
1524 } else {
1525 local->ps_sdata = NULL;
1526 }
1527
1528 ieee80211_change_ps(local);
1529 }
1530
1531 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1532 {
1533 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1534
1535 if (sdata->vif.bss_conf.ps != ps_allowed) {
1536 sdata->vif.bss_conf.ps = ps_allowed;
1537 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1538 }
1539 }
1540
1541 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1542 {
1543 struct ieee80211_local *local =
1544 container_of(work, struct ieee80211_local,
1545 dynamic_ps_disable_work);
1546
1547 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1548 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1550 }
1551
1552 ieee80211_wake_queues_by_reason(&local->hw,
1553 IEEE80211_MAX_QUEUE_MAP,
1554 IEEE80211_QUEUE_STOP_REASON_PS,
1555 false);
1556 }
1557
1558 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1559 {
1560 struct ieee80211_local *local =
1561 container_of(work, struct ieee80211_local,
1562 dynamic_ps_enable_work);
1563 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1564 struct ieee80211_if_managed *ifmgd;
1565 unsigned long flags;
1566 int q;
1567
1568 /* can only happen when PS was just disabled anyway */
1569 if (!sdata)
1570 return;
1571
1572 ifmgd = &sdata->u.mgd;
1573
1574 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1575 return;
1576
1577 if (local->hw.conf.dynamic_ps_timeout > 0) {
1578 /* don't enter PS if TX frames are pending */
1579 if (drv_tx_frames_pending(local)) {
1580 mod_timer(&local->dynamic_ps_timer, jiffies +
1581 msecs_to_jiffies(
1582 local->hw.conf.dynamic_ps_timeout));
1583 return;
1584 }
1585
1586 /*
1587 * transmission can be stopped by others which leads to
1588 * dynamic_ps_timer expiry. Postpone the ps timer if it
1589 * is not the actual idle state.
1590 */
1591 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1592 for (q = 0; q < local->hw.queues; q++) {
1593 if (local->queue_stop_reasons[q]) {
1594 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1595 flags);
1596 mod_timer(&local->dynamic_ps_timer, jiffies +
1597 msecs_to_jiffies(
1598 local->hw.conf.dynamic_ps_timeout));
1599 return;
1600 }
1601 }
1602 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1603 }
1604
1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1606 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1607 if (drv_tx_frames_pending(local)) {
1608 mod_timer(&local->dynamic_ps_timer, jiffies +
1609 msecs_to_jiffies(
1610 local->hw.conf.dynamic_ps_timeout));
1611 } else {
1612 ieee80211_send_nullfunc(local, sdata, true);
1613 /* Flush to get the tx status of nullfunc frame */
1614 ieee80211_flush_queues(local, sdata, false);
1615 }
1616 }
1617
1618 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1619 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1620 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1621 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1622 local->hw.conf.flags |= IEEE80211_CONF_PS;
1623 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1624 }
1625 }
1626
1627 void ieee80211_dynamic_ps_timer(unsigned long data)
1628 {
1629 struct ieee80211_local *local = (void *) data;
1630
1631 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1632 }
1633
1634 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1635 {
1636 struct delayed_work *delayed_work =
1637 container_of(work, struct delayed_work, work);
1638 struct ieee80211_sub_if_data *sdata =
1639 container_of(delayed_work, struct ieee80211_sub_if_data,
1640 dfs_cac_timer_work);
1641 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1642
1643 mutex_lock(&sdata->local->mtx);
1644 if (sdata->wdev.cac_started) {
1645 ieee80211_vif_release_channel(sdata);
1646 cfg80211_cac_event(sdata->dev, &chandef,
1647 NL80211_RADAR_CAC_FINISHED,
1648 GFP_KERNEL);
1649 }
1650 mutex_unlock(&sdata->local->mtx);
1651 }
1652
1653 static bool
1654 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1655 {
1656 struct ieee80211_local *local = sdata->local;
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1658 bool ret = false;
1659 int ac;
1660
1661 if (local->hw.queues < IEEE80211_NUM_ACS)
1662 return false;
1663
1664 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1665 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1666 int non_acm_ac;
1667 unsigned long now = jiffies;
1668
1669 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1670 tx_tspec->admitted_time &&
1671 time_after(now, tx_tspec->time_slice_start + HZ)) {
1672 tx_tspec->consumed_tx_time = 0;
1673 tx_tspec->time_slice_start = now;
1674
1675 if (tx_tspec->downgraded)
1676 tx_tspec->action =
1677 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1678 }
1679
1680 switch (tx_tspec->action) {
1681 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1682 /* take the original parameters */
1683 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1684 sdata_err(sdata,
1685 "failed to set TX queue parameters for queue %d\n",
1686 ac);
1687 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1688 tx_tspec->downgraded = false;
1689 ret = true;
1690 break;
1691 case TX_TSPEC_ACTION_DOWNGRADE:
1692 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1693 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1694 ret = true;
1695 break;
1696 }
1697 /* downgrade next lower non-ACM AC */
1698 for (non_acm_ac = ac + 1;
1699 non_acm_ac < IEEE80211_NUM_ACS;
1700 non_acm_ac++)
1701 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1702 break;
1703 /* The loop will result in using BK even if it requires
1704 * admission control, such configuration makes no sense
1705 * and we have to transmit somehow - the AC selection
1706 * does the same thing.
1707 */
1708 if (drv_conf_tx(local, sdata, ac,
1709 &sdata->tx_conf[non_acm_ac]))
1710 sdata_err(sdata,
1711 "failed to set TX queue parameters for queue %d\n",
1712 ac);
1713 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714 ret = true;
1715 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1716 tx_tspec->time_slice_start + HZ - now + 1);
1717 break;
1718 case TX_TSPEC_ACTION_NONE:
1719 /* nothing now */
1720 break;
1721 }
1722 }
1723
1724 return ret;
1725 }
1726
1727 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1728 {
1729 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1730 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1731 }
1732
1733 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1734 {
1735 struct ieee80211_sub_if_data *sdata;
1736
1737 sdata = container_of(work, struct ieee80211_sub_if_data,
1738 u.mgd.tx_tspec_wk.work);
1739 ieee80211_sta_handle_tspec_ac_params(sdata);
1740 }
1741
1742 /* MLME */
1743 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1744 struct ieee80211_sub_if_data *sdata,
1745 const u8 *wmm_param, size_t wmm_param_len)
1746 {
1747 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1749 size_t left;
1750 int count, ac;
1751 const u8 *pos;
1752 u8 uapsd_queues = 0;
1753
1754 if (!local->ops->conf_tx)
1755 return false;
1756
1757 if (local->hw.queues < IEEE80211_NUM_ACS)
1758 return false;
1759
1760 if (!wmm_param)
1761 return false;
1762
1763 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1764 return false;
1765
1766 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1767 uapsd_queues = ifmgd->uapsd_queues;
1768
1769 count = wmm_param[6] & 0x0f;
1770 if (count == ifmgd->wmm_last_param_set)
1771 return false;
1772 ifmgd->wmm_last_param_set = count;
1773
1774 pos = wmm_param + 8;
1775 left = wmm_param_len - 8;
1776
1777 memset(&params, 0, sizeof(params));
1778
1779 sdata->wmm_acm = 0;
1780 for (; left >= 4; left -= 4, pos += 4) {
1781 int aci = (pos[0] >> 5) & 0x03;
1782 int acm = (pos[0] >> 4) & 0x01;
1783 bool uapsd = false;
1784
1785 switch (aci) {
1786 case 1: /* AC_BK */
1787 ac = IEEE80211_AC_BK;
1788 if (acm)
1789 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1790 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1791 uapsd = true;
1792 break;
1793 case 2: /* AC_VI */
1794 ac = IEEE80211_AC_VI;
1795 if (acm)
1796 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1797 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1798 uapsd = true;
1799 break;
1800 case 3: /* AC_VO */
1801 ac = IEEE80211_AC_VO;
1802 if (acm)
1803 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1804 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1805 uapsd = true;
1806 break;
1807 case 0: /* AC_BE */
1808 default:
1809 ac = IEEE80211_AC_BE;
1810 if (acm)
1811 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1812 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1813 uapsd = true;
1814 break;
1815 }
1816
1817 params[ac].aifs = pos[0] & 0x0f;
1818
1819 if (params[ac].aifs < 2) {
1820 sdata_info(sdata,
1821 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1822 params[ac].aifs, aci);
1823 params[ac].aifs = 2;
1824 }
1825 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1826 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1827 params[ac].txop = get_unaligned_le16(pos + 2);
1828 params[ac].acm = acm;
1829 params[ac].uapsd = uapsd;
1830
1831 if (params[ac].cw_min > params[ac].cw_max) {
1832 sdata_info(sdata,
1833 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1834 params[ac].cw_min, params[ac].cw_max, aci);
1835 return false;
1836 }
1837 }
1838
1839 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1840 mlme_dbg(sdata,
1841 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1842 ac, params[ac].acm,
1843 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1844 params[ac].txop, params[ac].uapsd,
1845 ifmgd->tx_tspec[ac].downgraded);
1846 sdata->tx_conf[ac] = params[ac];
1847 if (!ifmgd->tx_tspec[ac].downgraded &&
1848 drv_conf_tx(local, sdata, ac, &params[ac]))
1849 sdata_err(sdata,
1850 "failed to set TX queue parameters for AC %d\n",
1851 ac);
1852 }
1853
1854 /* enable WMM or activate new settings */
1855 sdata->vif.bss_conf.qos = true;
1856 return true;
1857 }
1858
1859 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1860 {
1861 lockdep_assert_held(&sdata->local->mtx);
1862
1863 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1864 ieee80211_run_deferred_scan(sdata->local);
1865 }
1866
1867 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1868 {
1869 mutex_lock(&sdata->local->mtx);
1870 __ieee80211_stop_poll(sdata);
1871 mutex_unlock(&sdata->local->mtx);
1872 }
1873
1874 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1875 u16 capab, bool erp_valid, u8 erp)
1876 {
1877 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1878 u32 changed = 0;
1879 bool use_protection;
1880 bool use_short_preamble;
1881 bool use_short_slot;
1882
1883 if (erp_valid) {
1884 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1885 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1886 } else {
1887 use_protection = false;
1888 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1889 }
1890
1891 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1892 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1893 use_short_slot = true;
1894
1895 if (use_protection != bss_conf->use_cts_prot) {
1896 bss_conf->use_cts_prot = use_protection;
1897 changed |= BSS_CHANGED_ERP_CTS_PROT;
1898 }
1899
1900 if (use_short_preamble != bss_conf->use_short_preamble) {
1901 bss_conf->use_short_preamble = use_short_preamble;
1902 changed |= BSS_CHANGED_ERP_PREAMBLE;
1903 }
1904
1905 if (use_short_slot != bss_conf->use_short_slot) {
1906 bss_conf->use_short_slot = use_short_slot;
1907 changed |= BSS_CHANGED_ERP_SLOT;
1908 }
1909
1910 return changed;
1911 }
1912
1913 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1914 struct cfg80211_bss *cbss,
1915 u32 bss_info_changed)
1916 {
1917 struct ieee80211_bss *bss = (void *)cbss->priv;
1918 struct ieee80211_local *local = sdata->local;
1919 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1920
1921 bss_info_changed |= BSS_CHANGED_ASSOC;
1922 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1923 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1924
1925 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1926 beacon_loss_count * bss_conf->beacon_int));
1927
1928 sdata->u.mgd.associated = cbss;
1929 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1930
1931 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1932
1933 if (sdata->vif.p2p ||
1934 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1935 const struct cfg80211_bss_ies *ies;
1936
1937 rcu_read_lock();
1938 ies = rcu_dereference(cbss->ies);
1939 if (ies) {
1940 int ret;
1941
1942 ret = cfg80211_get_p2p_attr(
1943 ies->data, ies->len,
1944 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1945 (u8 *) &bss_conf->p2p_noa_attr,
1946 sizeof(bss_conf->p2p_noa_attr));
1947 if (ret >= 2) {
1948 sdata->u.mgd.p2p_noa_index =
1949 bss_conf->p2p_noa_attr.index;
1950 bss_info_changed |= BSS_CHANGED_P2P_PS;
1951 }
1952 }
1953 rcu_read_unlock();
1954 }
1955
1956 /* just to be sure */
1957 ieee80211_stop_poll(sdata);
1958
1959 ieee80211_led_assoc(local, 1);
1960
1961 if (sdata->u.mgd.have_beacon) {
1962 /*
1963 * If the AP is buggy we may get here with no DTIM period
1964 * known, so assume it's 1 which is the only safe assumption
1965 * in that case, although if the TIM IE is broken powersave
1966 * probably just won't work at all.
1967 */
1968 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1969 bss_conf->beacon_rate = bss->beacon_rate;
1970 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1971 } else {
1972 bss_conf->beacon_rate = NULL;
1973 bss_conf->dtim_period = 0;
1974 }
1975
1976 bss_conf->assoc = 1;
1977
1978 /* Tell the driver to monitor connection quality (if supported) */
1979 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1980 bss_conf->cqm_rssi_thold)
1981 bss_info_changed |= BSS_CHANGED_CQM;
1982
1983 /* Enable ARP filtering */
1984 if (bss_conf->arp_addr_cnt)
1985 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1986
1987 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1988
1989 mutex_lock(&local->iflist_mtx);
1990 ieee80211_recalc_ps(local);
1991 mutex_unlock(&local->iflist_mtx);
1992
1993 ieee80211_recalc_smps(sdata);
1994 ieee80211_recalc_ps_vif(sdata);
1995
1996 netif_carrier_on(sdata->dev);
1997 }
1998
1999 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2000 u16 stype, u16 reason, bool tx,
2001 u8 *frame_buf)
2002 {
2003 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2004 struct ieee80211_local *local = sdata->local;
2005 u32 changed = 0;
2006
2007 sdata_assert_lock(sdata);
2008
2009 if (WARN_ON_ONCE(tx && !frame_buf))
2010 return;
2011
2012 if (WARN_ON(!ifmgd->associated))
2013 return;
2014
2015 ieee80211_stop_poll(sdata);
2016
2017 ifmgd->associated = NULL;
2018 netif_carrier_off(sdata->dev);
2019
2020 /*
2021 * if we want to get out of ps before disassoc (why?) we have
2022 * to do it before sending disassoc, as otherwise the null-packet
2023 * won't be valid.
2024 */
2025 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2026 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2027 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2028 }
2029 local->ps_sdata = NULL;
2030
2031 /* disable per-vif ps */
2032 ieee80211_recalc_ps_vif(sdata);
2033
2034 /* make sure ongoing transmission finishes */
2035 synchronize_net();
2036
2037 /*
2038 * drop any frame before deauth/disassoc, this can be data or
2039 * management frame. Since we are disconnecting, we should not
2040 * insist sending these frames which can take time and delay
2041 * the disconnection and possible the roaming.
2042 */
2043 if (tx)
2044 ieee80211_flush_queues(local, sdata, true);
2045
2046 /* deauthenticate/disassociate now */
2047 if (tx || frame_buf)
2048 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2049 reason, tx, frame_buf);
2050
2051 /* flush out frame - make sure the deauth was actually sent */
2052 if (tx)
2053 ieee80211_flush_queues(local, sdata, false);
2054
2055 /* clear bssid only after building the needed mgmt frames */
2056 eth_zero_addr(ifmgd->bssid);
2057
2058 /* remove AP and TDLS peers */
2059 sta_info_flush(sdata);
2060
2061 /* finally reset all BSS / config parameters */
2062 changed |= ieee80211_reset_erp_info(sdata);
2063
2064 ieee80211_led_assoc(local, 0);
2065 changed |= BSS_CHANGED_ASSOC;
2066 sdata->vif.bss_conf.assoc = false;
2067
2068 ifmgd->p2p_noa_index = -1;
2069 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2070 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2071
2072 /* on the next assoc, re-program HT/VHT parameters */
2073 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2074 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2075 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2076 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2077 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2078
2079 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2080
2081 del_timer_sync(&local->dynamic_ps_timer);
2082 cancel_work_sync(&local->dynamic_ps_enable_work);
2083
2084 /* Disable ARP filtering */
2085 if (sdata->vif.bss_conf.arp_addr_cnt)
2086 changed |= BSS_CHANGED_ARP_FILTER;
2087
2088 sdata->vif.bss_conf.qos = false;
2089 changed |= BSS_CHANGED_QOS;
2090
2091 /* The BSSID (not really interesting) and HT changed */
2092 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2093 ieee80211_bss_info_change_notify(sdata, changed);
2094
2095 /* disassociated - set to defaults now */
2096 ieee80211_set_wmm_default(sdata, false, false);
2097
2098 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2099 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2100 del_timer_sync(&sdata->u.mgd.timer);
2101 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2102
2103 sdata->vif.bss_conf.dtim_period = 0;
2104 sdata->vif.bss_conf.beacon_rate = NULL;
2105
2106 ifmgd->have_beacon = false;
2107
2108 ifmgd->flags = 0;
2109 mutex_lock(&local->mtx);
2110 ieee80211_vif_release_channel(sdata);
2111
2112 sdata->vif.csa_active = false;
2113 ifmgd->csa_waiting_bcn = false;
2114 ifmgd->csa_ignored_same_chan = false;
2115 if (sdata->csa_block_tx) {
2116 ieee80211_wake_vif_queues(local, sdata,
2117 IEEE80211_QUEUE_STOP_REASON_CSA);
2118 sdata->csa_block_tx = false;
2119 }
2120 mutex_unlock(&local->mtx);
2121
2122 /* existing TX TSPEC sessions no longer exist */
2123 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2124 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2125
2126 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2127 }
2128
2129 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2130 struct ieee80211_hdr *hdr)
2131 {
2132 /*
2133 * We can postpone the mgd.timer whenever receiving unicast frames
2134 * from AP because we know that the connection is working both ways
2135 * at that time. But multicast frames (and hence also beacons) must
2136 * be ignored here, because we need to trigger the timer during
2137 * data idle periods for sending the periodic probe request to the
2138 * AP we're connected to.
2139 */
2140 if (is_multicast_ether_addr(hdr->addr1))
2141 return;
2142
2143 ieee80211_sta_reset_conn_monitor(sdata);
2144 }
2145
2146 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2147 {
2148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2149 struct ieee80211_local *local = sdata->local;
2150
2151 mutex_lock(&local->mtx);
2152 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2153 goto out;
2154
2155 __ieee80211_stop_poll(sdata);
2156
2157 mutex_lock(&local->iflist_mtx);
2158 ieee80211_recalc_ps(local);
2159 mutex_unlock(&local->iflist_mtx);
2160
2161 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2162 goto out;
2163
2164 /*
2165 * We've received a probe response, but are not sure whether
2166 * we have or will be receiving any beacons or data, so let's
2167 * schedule the timers again, just in case.
2168 */
2169 ieee80211_sta_reset_beacon_monitor(sdata);
2170
2171 mod_timer(&ifmgd->conn_mon_timer,
2172 round_jiffies_up(jiffies +
2173 IEEE80211_CONNECTION_IDLE_TIME));
2174 out:
2175 mutex_unlock(&local->mtx);
2176 }
2177
2178 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2179 struct ieee80211_hdr *hdr,
2180 u16 tx_time)
2181 {
2182 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2183 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2184 int ac = ieee80211_ac_from_tid(tid);
2185 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2186 unsigned long now = jiffies;
2187
2188 if (likely(!tx_tspec->admitted_time))
2189 return;
2190
2191 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2192 tx_tspec->consumed_tx_time = 0;
2193 tx_tspec->time_slice_start = now;
2194
2195 if (tx_tspec->downgraded) {
2196 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2197 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2198 }
2199 }
2200
2201 if (tx_tspec->downgraded)
2202 return;
2203
2204 tx_tspec->consumed_tx_time += tx_time;
2205
2206 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2207 tx_tspec->downgraded = true;
2208 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2209 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2210 }
2211 }
2212
2213 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2214 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2215 {
2216 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2217
2218 if (!ieee80211_is_data(hdr->frame_control))
2219 return;
2220
2221 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2222 sdata->u.mgd.probe_send_count > 0) {
2223 if (ack)
2224 ieee80211_sta_reset_conn_monitor(sdata);
2225 else
2226 sdata->u.mgd.nullfunc_failed = true;
2227 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2228 return;
2229 }
2230
2231 if (ack)
2232 ieee80211_sta_reset_conn_monitor(sdata);
2233 }
2234
2235 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2236 {
2237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2238 const u8 *ssid;
2239 u8 *dst = ifmgd->associated->bssid;
2240 u8 unicast_limit = max(1, max_probe_tries - 3);
2241
2242 /*
2243 * Try sending broadcast probe requests for the last three
2244 * probe requests after the first ones failed since some
2245 * buggy APs only support broadcast probe requests.
2246 */
2247 if (ifmgd->probe_send_count >= unicast_limit)
2248 dst = NULL;
2249
2250 /*
2251 * When the hardware reports an accurate Tx ACK status, it's
2252 * better to send a nullfunc frame instead of a probe request,
2253 * as it will kick us off the AP quickly if we aren't associated
2254 * anymore. The timeout will be reset if the frame is ACKed by
2255 * the AP.
2256 */
2257 ifmgd->probe_send_count++;
2258
2259 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2260 ifmgd->nullfunc_failed = false;
2261 ieee80211_send_nullfunc(sdata->local, sdata, false);
2262 } else {
2263 int ssid_len;
2264
2265 rcu_read_lock();
2266 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2267 if (WARN_ON_ONCE(ssid == NULL))
2268 ssid_len = 0;
2269 else
2270 ssid_len = ssid[1];
2271
2272 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2273 ssid + 2, ssid_len, NULL,
2274 0, (u32) -1, true, 0,
2275 ifmgd->associated->channel, false);
2276 rcu_read_unlock();
2277 }
2278
2279 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2280 run_again(sdata, ifmgd->probe_timeout);
2281 }
2282
2283 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2284 bool beacon)
2285 {
2286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2287 bool already = false;
2288
2289 if (!ieee80211_sdata_running(sdata))
2290 return;
2291
2292 sdata_lock(sdata);
2293
2294 if (!ifmgd->associated)
2295 goto out;
2296
2297 mutex_lock(&sdata->local->mtx);
2298
2299 if (sdata->local->tmp_channel || sdata->local->scanning) {
2300 mutex_unlock(&sdata->local->mtx);
2301 goto out;
2302 }
2303
2304 if (beacon) {
2305 mlme_dbg_ratelimited(sdata,
2306 "detected beacon loss from AP (missed %d beacons) - probing\n",
2307 beacon_loss_count);
2308
2309 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2310 }
2311
2312 /*
2313 * The driver/our work has already reported this event or the
2314 * connection monitoring has kicked in and we have already sent
2315 * a probe request. Or maybe the AP died and the driver keeps
2316 * reporting until we disassociate...
2317 *
2318 * In either case we have to ignore the current call to this
2319 * function (except for setting the correct probe reason bit)
2320 * because otherwise we would reset the timer every time and
2321 * never check whether we received a probe response!
2322 */
2323 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2324 already = true;
2325
2326 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2327
2328 mutex_unlock(&sdata->local->mtx);
2329
2330 if (already)
2331 goto out;
2332
2333 mutex_lock(&sdata->local->iflist_mtx);
2334 ieee80211_recalc_ps(sdata->local);
2335 mutex_unlock(&sdata->local->iflist_mtx);
2336
2337 ifmgd->probe_send_count = 0;
2338 ieee80211_mgd_probe_ap_send(sdata);
2339 out:
2340 sdata_unlock(sdata);
2341 }
2342
2343 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2344 struct ieee80211_vif *vif)
2345 {
2346 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2348 struct cfg80211_bss *cbss;
2349 struct sk_buff *skb;
2350 const u8 *ssid;
2351 int ssid_len;
2352
2353 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2354 return NULL;
2355
2356 sdata_assert_lock(sdata);
2357
2358 if (ifmgd->associated)
2359 cbss = ifmgd->associated;
2360 else if (ifmgd->auth_data)
2361 cbss = ifmgd->auth_data->bss;
2362 else if (ifmgd->assoc_data)
2363 cbss = ifmgd->assoc_data->bss;
2364 else
2365 return NULL;
2366
2367 rcu_read_lock();
2368 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2369 if (WARN_ON_ONCE(ssid == NULL))
2370 ssid_len = 0;
2371 else
2372 ssid_len = ssid[1];
2373
2374 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2375 (u32) -1, cbss->channel,
2376 ssid + 2, ssid_len,
2377 NULL, 0, true);
2378 rcu_read_unlock();
2379
2380 return skb;
2381 }
2382 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2383
2384 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2385 const u8 *buf, size_t len, bool tx,
2386 u16 reason)
2387 {
2388 struct ieee80211_event event = {
2389 .type = MLME_EVENT,
2390 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2391 .u.mlme.reason = reason,
2392 };
2393
2394 if (tx)
2395 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2396 else
2397 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2398
2399 drv_event_callback(sdata->local, sdata, &event);
2400 }
2401
2402 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2403 {
2404 struct ieee80211_local *local = sdata->local;
2405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2406 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2407
2408 sdata_lock(sdata);
2409 if (!ifmgd->associated) {
2410 sdata_unlock(sdata);
2411 return;
2412 }
2413
2414 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2415 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2416 true, frame_buf);
2417 mutex_lock(&local->mtx);
2418 sdata->vif.csa_active = false;
2419 ifmgd->csa_waiting_bcn = false;
2420 if (sdata->csa_block_tx) {
2421 ieee80211_wake_vif_queues(local, sdata,
2422 IEEE80211_QUEUE_STOP_REASON_CSA);
2423 sdata->csa_block_tx = false;
2424 }
2425 mutex_unlock(&local->mtx);
2426
2427 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2428 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2429
2430 sdata_unlock(sdata);
2431 }
2432
2433 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2434 {
2435 struct ieee80211_sub_if_data *sdata =
2436 container_of(work, struct ieee80211_sub_if_data,
2437 u.mgd.beacon_connection_loss_work);
2438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2439
2440 if (ifmgd->associated)
2441 ifmgd->beacon_loss_count++;
2442
2443 if (ifmgd->connection_loss) {
2444 sdata_info(sdata, "Connection to AP %pM lost\n",
2445 ifmgd->bssid);
2446 __ieee80211_disconnect(sdata);
2447 } else {
2448 ieee80211_mgd_probe_ap(sdata, true);
2449 }
2450 }
2451
2452 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2453 {
2454 struct ieee80211_sub_if_data *sdata =
2455 container_of(work, struct ieee80211_sub_if_data,
2456 u.mgd.csa_connection_drop_work);
2457
2458 __ieee80211_disconnect(sdata);
2459 }
2460
2461 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2462 {
2463 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2464 struct ieee80211_hw *hw = &sdata->local->hw;
2465
2466 trace_api_beacon_loss(sdata);
2467
2468 sdata->u.mgd.connection_loss = false;
2469 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2470 }
2471 EXPORT_SYMBOL(ieee80211_beacon_loss);
2472
2473 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2474 {
2475 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2476 struct ieee80211_hw *hw = &sdata->local->hw;
2477
2478 trace_api_connection_loss(sdata);
2479
2480 sdata->u.mgd.connection_loss = true;
2481 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2482 }
2483 EXPORT_SYMBOL(ieee80211_connection_loss);
2484
2485
2486 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2487 bool assoc)
2488 {
2489 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2490
2491 sdata_assert_lock(sdata);
2492
2493 if (!assoc) {
2494 /*
2495 * we are not authenticated yet, the only timer that could be
2496 * running is the timeout for the authentication response which
2497 * which is not relevant anymore.
2498 */
2499 del_timer_sync(&sdata->u.mgd.timer);
2500 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2501
2502 eth_zero_addr(sdata->u.mgd.bssid);
2503 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2504 sdata->u.mgd.flags = 0;
2505 mutex_lock(&sdata->local->mtx);
2506 ieee80211_vif_release_channel(sdata);
2507 mutex_unlock(&sdata->local->mtx);
2508 }
2509
2510 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2511 kfree(auth_data);
2512 sdata->u.mgd.auth_data = NULL;
2513 }
2514
2515 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2516 bool assoc)
2517 {
2518 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2519
2520 sdata_assert_lock(sdata);
2521
2522 if (!assoc) {
2523 /*
2524 * we are not associated yet, the only timer that could be
2525 * running is the timeout for the association response which
2526 * which is not relevant anymore.
2527 */
2528 del_timer_sync(&sdata->u.mgd.timer);
2529 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2530
2531 eth_zero_addr(sdata->u.mgd.bssid);
2532 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2533 sdata->u.mgd.flags = 0;
2534 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2535 mutex_lock(&sdata->local->mtx);
2536 ieee80211_vif_release_channel(sdata);
2537 mutex_unlock(&sdata->local->mtx);
2538 }
2539
2540 kfree(assoc_data);
2541 sdata->u.mgd.assoc_data = NULL;
2542 }
2543
2544 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2545 struct ieee80211_mgmt *mgmt, size_t len)
2546 {
2547 struct ieee80211_local *local = sdata->local;
2548 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2549 u8 *pos;
2550 struct ieee802_11_elems elems;
2551 u32 tx_flags = 0;
2552
2553 pos = mgmt->u.auth.variable;
2554 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2555 if (!elems.challenge)
2556 return;
2557 auth_data->expected_transaction = 4;
2558 drv_mgd_prepare_tx(sdata->local, sdata);
2559 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2560 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2561 IEEE80211_TX_INTFL_MLME_CONN_TX;
2562 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2563 elems.challenge - 2, elems.challenge_len + 2,
2564 auth_data->bss->bssid, auth_data->bss->bssid,
2565 auth_data->key, auth_data->key_len,
2566 auth_data->key_idx, tx_flags);
2567 }
2568
2569 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2570 struct ieee80211_mgmt *mgmt, size_t len)
2571 {
2572 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2573 u8 bssid[ETH_ALEN];
2574 u16 auth_alg, auth_transaction, status_code;
2575 struct sta_info *sta;
2576 struct ieee80211_event event = {
2577 .type = MLME_EVENT,
2578 .u.mlme.data = AUTH_EVENT,
2579 };
2580
2581 sdata_assert_lock(sdata);
2582
2583 if (len < 24 + 6)
2584 return;
2585
2586 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2587 return;
2588
2589 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2590
2591 if (!ether_addr_equal(bssid, mgmt->bssid))
2592 return;
2593
2594 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2595 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2596 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2597
2598 if (auth_alg != ifmgd->auth_data->algorithm ||
2599 auth_transaction != ifmgd->auth_data->expected_transaction) {
2600 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2601 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2602 auth_transaction,
2603 ifmgd->auth_data->expected_transaction);
2604 return;
2605 }
2606
2607 if (status_code != WLAN_STATUS_SUCCESS) {
2608 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2609 mgmt->sa, status_code);
2610 ieee80211_destroy_auth_data(sdata, false);
2611 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2612 event.u.mlme.status = MLME_DENIED;
2613 event.u.mlme.reason = status_code;
2614 drv_event_callback(sdata->local, sdata, &event);
2615 return;
2616 }
2617
2618 switch (ifmgd->auth_data->algorithm) {
2619 case WLAN_AUTH_OPEN:
2620 case WLAN_AUTH_LEAP:
2621 case WLAN_AUTH_FT:
2622 case WLAN_AUTH_SAE:
2623 break;
2624 case WLAN_AUTH_SHARED_KEY:
2625 if (ifmgd->auth_data->expected_transaction != 4) {
2626 ieee80211_auth_challenge(sdata, mgmt, len);
2627 /* need another frame */
2628 return;
2629 }
2630 break;
2631 default:
2632 WARN_ONCE(1, "invalid auth alg %d",
2633 ifmgd->auth_data->algorithm);
2634 return;
2635 }
2636
2637 event.u.mlme.status = MLME_SUCCESS;
2638 drv_event_callback(sdata->local, sdata, &event);
2639 sdata_info(sdata, "authenticated\n");
2640 ifmgd->auth_data->done = true;
2641 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2642 ifmgd->auth_data->timeout_started = true;
2643 run_again(sdata, ifmgd->auth_data->timeout);
2644
2645 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2646 ifmgd->auth_data->expected_transaction != 2) {
2647 /*
2648 * Report auth frame to user space for processing since another
2649 * round of Authentication frames is still needed.
2650 */
2651 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2652 return;
2653 }
2654
2655 /* move station state to auth */
2656 mutex_lock(&sdata->local->sta_mtx);
2657 sta = sta_info_get(sdata, bssid);
2658 if (!sta) {
2659 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2660 goto out_err;
2661 }
2662 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2663 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2664 goto out_err;
2665 }
2666 mutex_unlock(&sdata->local->sta_mtx);
2667
2668 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2669 return;
2670 out_err:
2671 mutex_unlock(&sdata->local->sta_mtx);
2672 /* ignore frame -- wait for timeout */
2673 }
2674
2675 #define case_WLAN(type) \
2676 case WLAN_REASON_##type: return #type
2677
2678 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2679 {
2680 switch (reason_code) {
2681 case_WLAN(UNSPECIFIED);
2682 case_WLAN(PREV_AUTH_NOT_VALID);
2683 case_WLAN(DEAUTH_LEAVING);
2684 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2685 case_WLAN(DISASSOC_AP_BUSY);
2686 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2687 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2688 case_WLAN(DISASSOC_STA_HAS_LEFT);
2689 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2690 case_WLAN(DISASSOC_BAD_POWER);
2691 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2692 case_WLAN(INVALID_IE);
2693 case_WLAN(MIC_FAILURE);
2694 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2695 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2696 case_WLAN(IE_DIFFERENT);
2697 case_WLAN(INVALID_GROUP_CIPHER);
2698 case_WLAN(INVALID_PAIRWISE_CIPHER);
2699 case_WLAN(INVALID_AKMP);
2700 case_WLAN(UNSUPP_RSN_VERSION);
2701 case_WLAN(INVALID_RSN_IE_CAP);
2702 case_WLAN(IEEE8021X_FAILED);
2703 case_WLAN(CIPHER_SUITE_REJECTED);
2704 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2705 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2706 case_WLAN(DISASSOC_LOW_ACK);
2707 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2708 case_WLAN(QSTA_LEAVE_QBSS);
2709 case_WLAN(QSTA_NOT_USE);
2710 case_WLAN(QSTA_REQUIRE_SETUP);
2711 case_WLAN(QSTA_TIMEOUT);
2712 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2713 case_WLAN(MESH_PEER_CANCELED);
2714 case_WLAN(MESH_MAX_PEERS);
2715 case_WLAN(MESH_CONFIG);
2716 case_WLAN(MESH_CLOSE);
2717 case_WLAN(MESH_MAX_RETRIES);
2718 case_WLAN(MESH_CONFIRM_TIMEOUT);
2719 case_WLAN(MESH_INVALID_GTK);
2720 case_WLAN(MESH_INCONSISTENT_PARAM);
2721 case_WLAN(MESH_INVALID_SECURITY);
2722 case_WLAN(MESH_PATH_ERROR);
2723 case_WLAN(MESH_PATH_NOFORWARD);
2724 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2725 case_WLAN(MAC_EXISTS_IN_MBSS);
2726 case_WLAN(MESH_CHAN_REGULATORY);
2727 case_WLAN(MESH_CHAN);
2728 default: return "<unknown>";
2729 }
2730 }
2731
2732 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2733 struct ieee80211_mgmt *mgmt, size_t len)
2734 {
2735 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2736 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2737
2738 sdata_assert_lock(sdata);
2739
2740 if (len < 24 + 2)
2741 return;
2742
2743 if (ifmgd->associated &&
2744 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2745 const u8 *bssid = ifmgd->associated->bssid;
2746
2747 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2748 bssid, reason_code,
2749 ieee80211_get_reason_code_string(reason_code));
2750
2751 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2752
2753 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2754 reason_code);
2755 return;
2756 }
2757
2758 if (ifmgd->assoc_data &&
2759 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2760 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2761
2762 sdata_info(sdata,
2763 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2764 bssid, reason_code,
2765 ieee80211_get_reason_code_string(reason_code));
2766
2767 ieee80211_destroy_assoc_data(sdata, false);
2768
2769 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2770 return;
2771 }
2772 }
2773
2774
2775 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2776 struct ieee80211_mgmt *mgmt, size_t len)
2777 {
2778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2779 u16 reason_code;
2780
2781 sdata_assert_lock(sdata);
2782
2783 if (len < 24 + 2)
2784 return;
2785
2786 if (!ifmgd->associated ||
2787 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2788 return;
2789
2790 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2791
2792 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2793 mgmt->sa, reason_code);
2794
2795 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2796
2797 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2798 }
2799
2800 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2801 u8 *supp_rates, unsigned int supp_rates_len,
2802 u32 *rates, u32 *basic_rates,
2803 bool *have_higher_than_11mbit,
2804 int *min_rate, int *min_rate_index,
2805 int shift, u32 rate_flags)
2806 {
2807 int i, j;
2808
2809 for (i = 0; i < supp_rates_len; i++) {
2810 int rate = supp_rates[i] & 0x7f;
2811 bool is_basic = !!(supp_rates[i] & 0x80);
2812
2813 if ((rate * 5 * (1 << shift)) > 110)
2814 *have_higher_than_11mbit = true;
2815
2816 /*
2817 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2818 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2819 *
2820 * Note: Even through the membership selector and the basic
2821 * rate flag share the same bit, they are not exactly
2822 * the same.
2823 */
2824 if (!!(supp_rates[i] & 0x80) &&
2825 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2826 continue;
2827
2828 for (j = 0; j < sband->n_bitrates; j++) {
2829 struct ieee80211_rate *br;
2830 int brate;
2831
2832 br = &sband->bitrates[j];
2833 if ((rate_flags & br->flags) != rate_flags)
2834 continue;
2835
2836 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2837 if (brate == rate) {
2838 *rates |= BIT(j);
2839 if (is_basic)
2840 *basic_rates |= BIT(j);
2841 if ((rate * 5) < *min_rate) {
2842 *min_rate = rate * 5;
2843 *min_rate_index = j;
2844 }
2845 break;
2846 }
2847 }
2848 }
2849 }
2850
2851 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2852 struct cfg80211_bss *cbss,
2853 struct ieee80211_mgmt *mgmt, size_t len)
2854 {
2855 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2856 struct ieee80211_local *local = sdata->local;
2857 struct ieee80211_supported_band *sband;
2858 struct sta_info *sta;
2859 u8 *pos;
2860 u16 capab_info, aid;
2861 struct ieee802_11_elems elems;
2862 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2863 const struct cfg80211_bss_ies *bss_ies = NULL;
2864 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2865 u32 changed = 0;
2866 int err;
2867 bool ret;
2868
2869 /* AssocResp and ReassocResp have identical structure */
2870
2871 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2872 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2873
2874 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2875 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2876 aid);
2877 aid &= ~(BIT(15) | BIT(14));
2878
2879 ifmgd->broken_ap = false;
2880
2881 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2882 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2883 aid);
2884 aid = 0;
2885 ifmgd->broken_ap = true;
2886 }
2887
2888 pos = mgmt->u.assoc_resp.variable;
2889 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2890
2891 if (!elems.supp_rates) {
2892 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2893 return false;
2894 }
2895
2896 ifmgd->aid = aid;
2897 ifmgd->tdls_chan_switch_prohibited =
2898 elems.ext_capab && elems.ext_capab_len >= 5 &&
2899 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2900
2901 /*
2902 * Some APs are erroneously not including some information in their
2903 * (re)association response frames. Try to recover by using the data
2904 * from the beacon or probe response. This seems to afflict mobile
2905 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2906 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2907 */
2908 if ((assoc_data->wmm && !elems.wmm_param) ||
2909 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2910 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2911 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2912 (!elems.vht_cap_elem || !elems.vht_operation))) {
2913 const struct cfg80211_bss_ies *ies;
2914 struct ieee802_11_elems bss_elems;
2915
2916 rcu_read_lock();
2917 ies = rcu_dereference(cbss->ies);
2918 if (ies)
2919 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2920 GFP_ATOMIC);
2921 rcu_read_unlock();
2922 if (!bss_ies)
2923 return false;
2924
2925 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2926 false, &bss_elems);
2927 if (assoc_data->wmm &&
2928 !elems.wmm_param && bss_elems.wmm_param) {
2929 elems.wmm_param = bss_elems.wmm_param;
2930 sdata_info(sdata,
2931 "AP bug: WMM param missing from AssocResp\n");
2932 }
2933
2934 /*
2935 * Also check if we requested HT/VHT, otherwise the AP doesn't
2936 * have to include the IEs in the (re)association response.
2937 */
2938 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2939 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2940 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2941 sdata_info(sdata,
2942 "AP bug: HT capability missing from AssocResp\n");
2943 }
2944 if (!elems.ht_operation && bss_elems.ht_operation &&
2945 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2946 elems.ht_operation = bss_elems.ht_operation;
2947 sdata_info(sdata,
2948 "AP bug: HT operation missing from AssocResp\n");
2949 }
2950 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2951 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2952 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2953 sdata_info(sdata,
2954 "AP bug: VHT capa missing from AssocResp\n");
2955 }
2956 if (!elems.vht_operation && bss_elems.vht_operation &&
2957 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2958 elems.vht_operation = bss_elems.vht_operation;
2959 sdata_info(sdata,
2960 "AP bug: VHT operation missing from AssocResp\n");
2961 }
2962 }
2963
2964 /*
2965 * We previously checked these in the beacon/probe response, so
2966 * they should be present here. This is just a safety net.
2967 */
2968 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2969 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2970 sdata_info(sdata,
2971 "HT AP is missing WMM params or HT capability/operation\n");
2972 ret = false;
2973 goto out;
2974 }
2975
2976 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2977 (!elems.vht_cap_elem || !elems.vht_operation)) {
2978 sdata_info(sdata,
2979 "VHT AP is missing VHT capability/operation\n");
2980 ret = false;
2981 goto out;
2982 }
2983
2984 mutex_lock(&sdata->local->sta_mtx);
2985 /*
2986 * station info was already allocated and inserted before
2987 * the association and should be available to us
2988 */
2989 sta = sta_info_get(sdata, cbss->bssid);
2990 if (WARN_ON(!sta)) {
2991 mutex_unlock(&sdata->local->sta_mtx);
2992 ret = false;
2993 goto out;
2994 }
2995
2996 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2997
2998 /* Set up internal HT/VHT capabilities */
2999 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3000 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3001 elems.ht_cap_elem, sta);
3002
3003 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3004 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3005 elems.vht_cap_elem, sta);
3006
3007 /*
3008 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3009 * in their association response, so ignore that data for our own
3010 * configuration. If it changed since the last beacon, we'll get the
3011 * next beacon and update then.
3012 */
3013
3014 /*
3015 * If an operating mode notification IE is present, override the
3016 * NSS calculation (that would be done in rate_control_rate_init())
3017 * and use the # of streams from that element.
3018 */
3019 if (elems.opmode_notif &&
3020 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3021 u8 nss;
3022
3023 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3024 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3025 nss += 1;
3026 sta->sta.rx_nss = nss;
3027 }
3028
3029 rate_control_rate_init(sta);
3030
3031 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3032 set_sta_flag(sta, WLAN_STA_MFP);
3033 sta->sta.mfp = true;
3034 } else {
3035 sta->sta.mfp = false;
3036 }
3037
3038 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3039
3040 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3041 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3042 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3043 if (err) {
3044 sdata_info(sdata,
3045 "failed to move station %pM to desired state\n",
3046 sta->sta.addr);
3047 WARN_ON(__sta_info_destroy(sta));
3048 mutex_unlock(&sdata->local->sta_mtx);
3049 ret = false;
3050 goto out;
3051 }
3052
3053 mutex_unlock(&sdata->local->sta_mtx);
3054
3055 /*
3056 * Always handle WMM once after association regardless
3057 * of the first value the AP uses. Setting -1 here has
3058 * that effect because the AP values is an unsigned
3059 * 4-bit value.
3060 */
3061 ifmgd->wmm_last_param_set = -1;
3062
3063 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3064 ieee80211_set_wmm_default(sdata, false, false);
3065 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3066 elems.wmm_param_len)) {
3067 /* still enable QoS since we might have HT/VHT */
3068 ieee80211_set_wmm_default(sdata, false, true);
3069 /* set the disable-WMM flag in this case to disable
3070 * tracking WMM parameter changes in the beacon if
3071 * the parameters weren't actually valid. Doing so
3072 * avoids changing parameters very strangely when
3073 * the AP is going back and forth between valid and
3074 * invalid parameters.
3075 */
3076 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3077 }
3078 changed |= BSS_CHANGED_QOS;
3079
3080 /* set AID and assoc capability,
3081 * ieee80211_set_associated() will tell the driver */
3082 bss_conf->aid = aid;
3083 bss_conf->assoc_capability = capab_info;
3084 ieee80211_set_associated(sdata, cbss, changed);
3085
3086 /*
3087 * If we're using 4-addr mode, let the AP know that we're
3088 * doing so, so that it can create the STA VLAN on its side
3089 */
3090 if (ifmgd->use_4addr)
3091 ieee80211_send_4addr_nullfunc(local, sdata);
3092
3093 /*
3094 * Start timer to probe the connection to the AP now.
3095 * Also start the timer that will detect beacon loss.
3096 */
3097 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3098 ieee80211_sta_reset_beacon_monitor(sdata);
3099
3100 ret = true;
3101 out:
3102 kfree(bss_ies);
3103 return ret;
3104 }
3105
3106 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3107 struct ieee80211_mgmt *mgmt,
3108 size_t len)
3109 {
3110 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3111 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3112 u16 capab_info, status_code, aid;
3113 struct ieee802_11_elems elems;
3114 int ac, uapsd_queues = -1;
3115 u8 *pos;
3116 bool reassoc;
3117 struct cfg80211_bss *bss;
3118 struct ieee80211_event event = {
3119 .type = MLME_EVENT,
3120 .u.mlme.data = ASSOC_EVENT,
3121 };
3122
3123 sdata_assert_lock(sdata);
3124
3125 if (!assoc_data)
3126 return;
3127 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3128 return;
3129
3130 /*
3131 * AssocResp and ReassocResp have identical structure, so process both
3132 * of them in this function.
3133 */
3134
3135 if (len < 24 + 6)
3136 return;
3137
3138 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3139 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3140 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3141 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3142
3143 sdata_info(sdata,
3144 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3145 reassoc ? "Rea" : "A", mgmt->sa,
3146 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3147
3148 pos = mgmt->u.assoc_resp.variable;
3149 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3150
3151 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3152 elems.timeout_int &&
3153 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3154 u32 tu, ms;
3155 tu = le32_to_cpu(elems.timeout_int->value);
3156 ms = tu * 1024 / 1000;
3157 sdata_info(sdata,
3158 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3159 mgmt->sa, tu, ms);
3160 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3161 assoc_data->timeout_started = true;
3162 if (ms > IEEE80211_ASSOC_TIMEOUT)
3163 run_again(sdata, assoc_data->timeout);
3164 return;
3165 }
3166
3167 bss = assoc_data->bss;
3168
3169 if (status_code != WLAN_STATUS_SUCCESS) {
3170 sdata_info(sdata, "%pM denied association (code=%d)\n",
3171 mgmt->sa, status_code);
3172 ieee80211_destroy_assoc_data(sdata, false);
3173 event.u.mlme.status = MLME_DENIED;
3174 event.u.mlme.reason = status_code;
3175 drv_event_callback(sdata->local, sdata, &event);
3176 } else {
3177 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3178 /* oops -- internal error -- send timeout for now */
3179 ieee80211_destroy_assoc_data(sdata, false);
3180 cfg80211_assoc_timeout(sdata->dev, bss);
3181 return;
3182 }
3183 event.u.mlme.status = MLME_SUCCESS;
3184 drv_event_callback(sdata->local, sdata, &event);
3185 sdata_info(sdata, "associated\n");
3186
3187 /*
3188 * destroy assoc_data afterwards, as otherwise an idle
3189 * recalc after assoc_data is NULL but before associated
3190 * is set can cause the interface to go idle
3191 */
3192 ieee80211_destroy_assoc_data(sdata, true);
3193
3194 /* get uapsd queues configuration */
3195 uapsd_queues = 0;
3196 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3197 if (sdata->tx_conf[ac].uapsd)
3198 uapsd_queues |= BIT(ac);
3199 }
3200
3201 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3202 }
3203
3204 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3205 struct ieee80211_mgmt *mgmt, size_t len,
3206 struct ieee80211_rx_status *rx_status,
3207 struct ieee802_11_elems *elems)
3208 {
3209 struct ieee80211_local *local = sdata->local;
3210 struct ieee80211_bss *bss;
3211 struct ieee80211_channel *channel;
3212
3213 sdata_assert_lock(sdata);
3214
3215 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3216 if (!channel)
3217 return;
3218
3219 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3220 channel);
3221 if (bss) {
3222 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3223 ieee80211_rx_bss_put(local, bss);
3224 }
3225 }
3226
3227
3228 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3229 struct sk_buff *skb)
3230 {
3231 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3232 struct ieee80211_if_managed *ifmgd;
3233 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3234 size_t baselen, len = skb->len;
3235 struct ieee802_11_elems elems;
3236
3237 ifmgd = &sdata->u.mgd;
3238
3239 sdata_assert_lock(sdata);
3240
3241 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3242 return; /* ignore ProbeResp to foreign address */
3243
3244 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3245 if (baselen > len)
3246 return;
3247
3248 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3249 false, &elems);
3250
3251 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3252
3253 if (ifmgd->associated &&
3254 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3255 ieee80211_reset_ap_probe(sdata);
3256 }
3257
3258 /*
3259 * This is the canonical list of information elements we care about,
3260 * the filter code also gives us all changes to the Microsoft OUI
3261 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3262 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3263 * changes to requested client power.
3264 *
3265 * We implement beacon filtering in software since that means we can
3266 * avoid processing the frame here and in cfg80211, and userspace
3267 * will not be able to tell whether the hardware supports it or not.
3268 *
3269 * XXX: This list needs to be dynamic -- userspace needs to be able to
3270 * add items it requires. It also needs to be able to tell us to
3271 * look out for other vendor IEs.
3272 */
3273 static const u64 care_about_ies =
3274 (1ULL << WLAN_EID_COUNTRY) |
3275 (1ULL << WLAN_EID_ERP_INFO) |
3276 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3277 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3278 (1ULL << WLAN_EID_HT_CAPABILITY) |
3279 (1ULL << WLAN_EID_HT_OPERATION) |
3280 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3281
3282 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3283 struct ieee80211_mgmt *mgmt, size_t len,
3284 struct ieee80211_rx_status *rx_status)
3285 {
3286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3287 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3288 size_t baselen;
3289 struct ieee802_11_elems elems;
3290 struct ieee80211_local *local = sdata->local;
3291 struct ieee80211_chanctx_conf *chanctx_conf;
3292 struct ieee80211_channel *chan;
3293 struct sta_info *sta;
3294 u32 changed = 0;
3295 bool erp_valid;
3296 u8 erp_value = 0;
3297 u32 ncrc;
3298 u8 *bssid;
3299 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3300
3301 sdata_assert_lock(sdata);
3302
3303 /* Process beacon from the current BSS */
3304 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3305 if (baselen > len)
3306 return;
3307
3308 rcu_read_lock();
3309 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3310 if (!chanctx_conf) {
3311 rcu_read_unlock();
3312 return;
3313 }
3314
3315 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3316 rcu_read_unlock();
3317 return;
3318 }
3319 chan = chanctx_conf->def.chan;
3320 rcu_read_unlock();
3321
3322 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3323 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3324 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3325 len - baselen, false, &elems);
3326
3327 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3328 if (elems.tim && !elems.parse_error) {
3329 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3330 ifmgd->dtim_period = tim_ie->dtim_period;
3331 }
3332 ifmgd->have_beacon = true;
3333 ifmgd->assoc_data->need_beacon = false;
3334 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3335 sdata->vif.bss_conf.sync_tsf =
3336 le64_to_cpu(mgmt->u.beacon.timestamp);
3337 sdata->vif.bss_conf.sync_device_ts =
3338 rx_status->device_timestamp;
3339 if (elems.tim)
3340 sdata->vif.bss_conf.sync_dtim_count =
3341 elems.tim->dtim_count;
3342 else
3343 sdata->vif.bss_conf.sync_dtim_count = 0;
3344 }
3345 /* continue assoc process */
3346 ifmgd->assoc_data->timeout = jiffies;
3347 ifmgd->assoc_data->timeout_started = true;
3348 run_again(sdata, ifmgd->assoc_data->timeout);
3349 return;
3350 }
3351
3352 if (!ifmgd->associated ||
3353 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3354 return;
3355 bssid = ifmgd->associated->bssid;
3356
3357 /* Track average RSSI from the Beacon frames of the current AP */
3358 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3359 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3360 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3361 ifmgd->last_cqm_event_signal = 0;
3362 ifmgd->count_beacon_signal = 1;
3363 ifmgd->last_ave_beacon_signal = 0;
3364 } else {
3365 ifmgd->count_beacon_signal++;
3366 }
3367
3368 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3369
3370 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3371 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3372 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3373 int last_sig = ifmgd->last_ave_beacon_signal;
3374 struct ieee80211_event event = {
3375 .type = RSSI_EVENT,
3376 };
3377
3378 /*
3379 * if signal crosses either of the boundaries, invoke callback
3380 * with appropriate parameters
3381 */
3382 if (sig > ifmgd->rssi_max_thold &&
3383 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3384 ifmgd->last_ave_beacon_signal = sig;
3385 event.u.rssi.data = RSSI_EVENT_HIGH;
3386 drv_event_callback(local, sdata, &event);
3387 } else if (sig < ifmgd->rssi_min_thold &&
3388 (last_sig >= ifmgd->rssi_max_thold ||
3389 last_sig == 0)) {
3390 ifmgd->last_ave_beacon_signal = sig;
3391 event.u.rssi.data = RSSI_EVENT_LOW;
3392 drv_event_callback(local, sdata, &event);
3393 }
3394 }
3395
3396 if (bss_conf->cqm_rssi_thold &&
3397 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3398 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3399 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3400 int last_event = ifmgd->last_cqm_event_signal;
3401 int thold = bss_conf->cqm_rssi_thold;
3402 int hyst = bss_conf->cqm_rssi_hyst;
3403
3404 if (sig < thold &&
3405 (last_event == 0 || sig < last_event - hyst)) {
3406 ifmgd->last_cqm_event_signal = sig;
3407 ieee80211_cqm_rssi_notify(
3408 &sdata->vif,
3409 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3410 GFP_KERNEL);
3411 } else if (sig > thold &&
3412 (last_event == 0 || sig > last_event + hyst)) {
3413 ifmgd->last_cqm_event_signal = sig;
3414 ieee80211_cqm_rssi_notify(
3415 &sdata->vif,
3416 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3417 GFP_KERNEL);
3418 }
3419 }
3420
3421 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3422 mlme_dbg_ratelimited(sdata,
3423 "cancelling AP probe due to a received beacon\n");
3424 ieee80211_reset_ap_probe(sdata);
3425 }
3426
3427 /*
3428 * Push the beacon loss detection into the future since
3429 * we are processing a beacon from the AP just now.
3430 */
3431 ieee80211_sta_reset_beacon_monitor(sdata);
3432
3433 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3434 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3435 len - baselen, false, &elems,
3436 care_about_ies, ncrc);
3437
3438 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3439 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3440 if (local->hw.conf.dynamic_ps_timeout > 0) {
3441 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3442 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3443 ieee80211_hw_config(local,
3444 IEEE80211_CONF_CHANGE_PS);
3445 }
3446 ieee80211_send_nullfunc(local, sdata, false);
3447 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3448 local->pspolling = true;
3449
3450 /*
3451 * Here is assumed that the driver will be
3452 * able to send ps-poll frame and receive a
3453 * response even though power save mode is
3454 * enabled, but some drivers might require
3455 * to disable power save here. This needs
3456 * to be investigated.
3457 */
3458 ieee80211_send_pspoll(local, sdata);
3459 }
3460 }
3461
3462 if (sdata->vif.p2p ||
3463 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3464 struct ieee80211_p2p_noa_attr noa = {};
3465 int ret;
3466
3467 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3468 len - baselen,
3469 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3470 (u8 *) &noa, sizeof(noa));
3471 if (ret >= 2) {
3472 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3473 /* valid noa_attr and index changed */
3474 sdata->u.mgd.p2p_noa_index = noa.index;
3475 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3476 changed |= BSS_CHANGED_P2P_PS;
3477 /*
3478 * make sure we update all information, the CRC
3479 * mechanism doesn't look at P2P attributes.
3480 */
3481 ifmgd->beacon_crc_valid = false;
3482 }
3483 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3484 /* noa_attr not found and we had valid noa_attr before */
3485 sdata->u.mgd.p2p_noa_index = -1;
3486 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3487 changed |= BSS_CHANGED_P2P_PS;
3488 ifmgd->beacon_crc_valid = false;
3489 }
3490 }
3491
3492 if (ifmgd->csa_waiting_bcn)
3493 ieee80211_chswitch_post_beacon(sdata);
3494
3495 /*
3496 * Update beacon timing and dtim count on every beacon appearance. This
3497 * will allow the driver to use the most updated values. Do it before
3498 * comparing this one with last received beacon.
3499 * IMPORTANT: These parameters would possibly be out of sync by the time
3500 * the driver will use them. The synchronized view is currently
3501 * guaranteed only in certain callbacks.
3502 */
3503 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3504 sdata->vif.bss_conf.sync_tsf =
3505 le64_to_cpu(mgmt->u.beacon.timestamp);
3506 sdata->vif.bss_conf.sync_device_ts =
3507 rx_status->device_timestamp;
3508 if (elems.tim)
3509 sdata->vif.bss_conf.sync_dtim_count =
3510 elems.tim->dtim_count;
3511 else
3512 sdata->vif.bss_conf.sync_dtim_count = 0;
3513 }
3514
3515 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3516 return;
3517 ifmgd->beacon_crc = ncrc;
3518 ifmgd->beacon_crc_valid = true;
3519
3520 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3521
3522 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3523 rx_status->device_timestamp,
3524 &elems, true);
3525
3526 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3527 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3528 elems.wmm_param_len))
3529 changed |= BSS_CHANGED_QOS;
3530
3531 /*
3532 * If we haven't had a beacon before, tell the driver about the
3533 * DTIM period (and beacon timing if desired) now.
3534 */
3535 if (!ifmgd->have_beacon) {
3536 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3537 if (elems.tim)
3538 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3539 else
3540 bss_conf->dtim_period = 1;
3541
3542 changed |= BSS_CHANGED_BEACON_INFO;
3543 ifmgd->have_beacon = true;
3544
3545 mutex_lock(&local->iflist_mtx);
3546 ieee80211_recalc_ps(local);
3547 mutex_unlock(&local->iflist_mtx);
3548
3549 ieee80211_recalc_ps_vif(sdata);
3550 }
3551
3552 if (elems.erp_info) {
3553 erp_valid = true;
3554 erp_value = elems.erp_info[0];
3555 } else {
3556 erp_valid = false;
3557 }
3558 changed |= ieee80211_handle_bss_capability(sdata,
3559 le16_to_cpu(mgmt->u.beacon.capab_info),
3560 erp_valid, erp_value);
3561
3562 mutex_lock(&local->sta_mtx);
3563 sta = sta_info_get(sdata, bssid);
3564
3565 if (ieee80211_config_bw(sdata, sta,
3566 elems.ht_cap_elem, elems.ht_operation,
3567 elems.vht_operation, bssid, &changed)) {
3568 mutex_unlock(&local->sta_mtx);
3569 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3570 WLAN_REASON_DEAUTH_LEAVING,
3571 true, deauth_buf);
3572 ieee80211_report_disconnect(sdata, deauth_buf,
3573 sizeof(deauth_buf), true,
3574 WLAN_REASON_DEAUTH_LEAVING);
3575 return;
3576 }
3577
3578 if (sta && elems.opmode_notif)
3579 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3580 rx_status->band, true);
3581 mutex_unlock(&local->sta_mtx);
3582
3583 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3584 elems.country_elem,
3585 elems.country_elem_len,
3586 elems.pwr_constr_elem,
3587 elems.cisco_dtpc_elem);
3588
3589 ieee80211_bss_info_change_notify(sdata, changed);
3590 }
3591
3592 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3593 struct sk_buff *skb)
3594 {
3595 struct ieee80211_rx_status *rx_status;
3596 struct ieee80211_mgmt *mgmt;
3597 u16 fc;
3598 struct ieee802_11_elems elems;
3599 int ies_len;
3600
3601 rx_status = (struct ieee80211_rx_status *) skb->cb;
3602 mgmt = (struct ieee80211_mgmt *) skb->data;
3603 fc = le16_to_cpu(mgmt->frame_control);
3604
3605 sdata_lock(sdata);
3606
3607 switch (fc & IEEE80211_FCTL_STYPE) {
3608 case IEEE80211_STYPE_BEACON:
3609 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3610 break;
3611 case IEEE80211_STYPE_PROBE_RESP:
3612 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3613 break;
3614 case IEEE80211_STYPE_AUTH:
3615 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3616 break;
3617 case IEEE80211_STYPE_DEAUTH:
3618 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3619 break;
3620 case IEEE80211_STYPE_DISASSOC:
3621 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3622 break;
3623 case IEEE80211_STYPE_ASSOC_RESP:
3624 case IEEE80211_STYPE_REASSOC_RESP:
3625 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3626 break;
3627 case IEEE80211_STYPE_ACTION:
3628 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3629 ies_len = skb->len -
3630 offsetof(struct ieee80211_mgmt,
3631 u.action.u.chan_switch.variable);
3632
3633 if (ies_len < 0)
3634 break;
3635
3636 ieee802_11_parse_elems(
3637 mgmt->u.action.u.chan_switch.variable,
3638 ies_len, true, &elems);
3639
3640 if (elems.parse_error)
3641 break;
3642
3643 ieee80211_sta_process_chanswitch(sdata,
3644 rx_status->mactime,
3645 rx_status->device_timestamp,
3646 &elems, false);
3647 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3648 ies_len = skb->len -
3649 offsetof(struct ieee80211_mgmt,
3650 u.action.u.ext_chan_switch.variable);
3651
3652 if (ies_len < 0)
3653 break;
3654
3655 ieee802_11_parse_elems(
3656 mgmt->u.action.u.ext_chan_switch.variable,
3657 ies_len, true, &elems);
3658
3659 if (elems.parse_error)
3660 break;
3661
3662 /* for the handling code pretend this was also an IE */
3663 elems.ext_chansw_ie =
3664 &mgmt->u.action.u.ext_chan_switch.data;
3665
3666 ieee80211_sta_process_chanswitch(sdata,
3667 rx_status->mactime,
3668 rx_status->device_timestamp,
3669 &elems, false);
3670 }
3671 break;
3672 }
3673 sdata_unlock(sdata);
3674 }
3675
3676 static void ieee80211_sta_timer(unsigned long data)
3677 {
3678 struct ieee80211_sub_if_data *sdata =
3679 (struct ieee80211_sub_if_data *) data;
3680
3681 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3682 }
3683
3684 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3685 u8 *bssid, u8 reason, bool tx)
3686 {
3687 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3688
3689 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3690 tx, frame_buf);
3691
3692 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3693 reason);
3694 }
3695
3696 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3697 {
3698 struct ieee80211_local *local = sdata->local;
3699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3700 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3701 u32 tx_flags = 0;
3702 u16 trans = 1;
3703 u16 status = 0;
3704
3705 sdata_assert_lock(sdata);
3706
3707 if (WARN_ON_ONCE(!auth_data))
3708 return -EINVAL;
3709
3710 auth_data->tries++;
3711
3712 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3713 sdata_info(sdata, "authentication with %pM timed out\n",
3714 auth_data->bss->bssid);
3715
3716 /*
3717 * Most likely AP is not in the range so remove the
3718 * bss struct for that AP.
3719 */
3720 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3721
3722 return -ETIMEDOUT;
3723 }
3724
3725 drv_mgd_prepare_tx(local, sdata);
3726
3727 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3728 auth_data->bss->bssid, auth_data->tries,
3729 IEEE80211_AUTH_MAX_TRIES);
3730
3731 auth_data->expected_transaction = 2;
3732
3733 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3734 trans = auth_data->sae_trans;
3735 status = auth_data->sae_status;
3736 auth_data->expected_transaction = trans;
3737 }
3738
3739 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3740 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3741 IEEE80211_TX_INTFL_MLME_CONN_TX;
3742
3743 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3744 auth_data->data, auth_data->data_len,
3745 auth_data->bss->bssid,
3746 auth_data->bss->bssid, NULL, 0, 0,
3747 tx_flags);
3748
3749 if (tx_flags == 0) {
3750 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3751 auth_data->timeout_started = true;
3752 run_again(sdata, auth_data->timeout);
3753 } else {
3754 auth_data->timeout =
3755 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3756 auth_data->timeout_started = true;
3757 run_again(sdata, auth_data->timeout);
3758 }
3759
3760 return 0;
3761 }
3762
3763 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3764 {
3765 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3766 struct ieee80211_local *local = sdata->local;
3767
3768 sdata_assert_lock(sdata);
3769
3770 assoc_data->tries++;
3771 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3772 sdata_info(sdata, "association with %pM timed out\n",
3773 assoc_data->bss->bssid);
3774
3775 /*
3776 * Most likely AP is not in the range so remove the
3777 * bss struct for that AP.
3778 */
3779 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3780
3781 return -ETIMEDOUT;
3782 }
3783
3784 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3785 assoc_data->bss->bssid, assoc_data->tries,
3786 IEEE80211_ASSOC_MAX_TRIES);
3787 ieee80211_send_assoc(sdata);
3788
3789 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3790 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3791 assoc_data->timeout_started = true;
3792 run_again(sdata, assoc_data->timeout);
3793 } else {
3794 assoc_data->timeout =
3795 round_jiffies_up(jiffies +
3796 IEEE80211_ASSOC_TIMEOUT_LONG);
3797 assoc_data->timeout_started = true;
3798 run_again(sdata, assoc_data->timeout);
3799 }
3800
3801 return 0;
3802 }
3803
3804 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3805 __le16 fc, bool acked)
3806 {
3807 struct ieee80211_local *local = sdata->local;
3808
3809 sdata->u.mgd.status_fc = fc;
3810 sdata->u.mgd.status_acked = acked;
3811 sdata->u.mgd.status_received = true;
3812
3813 ieee80211_queue_work(&local->hw, &sdata->work);
3814 }
3815
3816 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3817 {
3818 struct ieee80211_local *local = sdata->local;
3819 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3820
3821 sdata_lock(sdata);
3822
3823 if (ifmgd->status_received) {
3824 __le16 fc = ifmgd->status_fc;
3825 bool status_acked = ifmgd->status_acked;
3826
3827 ifmgd->status_received = false;
3828 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3829 if (status_acked) {
3830 ifmgd->auth_data->timeout =
3831 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3832 run_again(sdata, ifmgd->auth_data->timeout);
3833 } else {
3834 ifmgd->auth_data->timeout = jiffies - 1;
3835 }
3836 ifmgd->auth_data->timeout_started = true;
3837 } else if (ifmgd->assoc_data &&
3838 (ieee80211_is_assoc_req(fc) ||
3839 ieee80211_is_reassoc_req(fc))) {
3840 if (status_acked) {
3841 ifmgd->assoc_data->timeout =
3842 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3843 run_again(sdata, ifmgd->assoc_data->timeout);
3844 } else {
3845 ifmgd->assoc_data->timeout = jiffies - 1;
3846 }
3847 ifmgd->assoc_data->timeout_started = true;
3848 }
3849 }
3850
3851 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3852 time_after(jiffies, ifmgd->auth_data->timeout)) {
3853 if (ifmgd->auth_data->done) {
3854 /*
3855 * ok ... we waited for assoc but userspace didn't,
3856 * so let's just kill the auth data
3857 */
3858 ieee80211_destroy_auth_data(sdata, false);
3859 } else if (ieee80211_auth(sdata)) {
3860 u8 bssid[ETH_ALEN];
3861 struct ieee80211_event event = {
3862 .type = MLME_EVENT,
3863 .u.mlme.data = AUTH_EVENT,
3864 .u.mlme.status = MLME_TIMEOUT,
3865 };
3866
3867 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3868
3869 ieee80211_destroy_auth_data(sdata, false);
3870
3871 cfg80211_auth_timeout(sdata->dev, bssid);
3872 drv_event_callback(sdata->local, sdata, &event);
3873 }
3874 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3875 run_again(sdata, ifmgd->auth_data->timeout);
3876
3877 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3878 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3879 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3880 ieee80211_do_assoc(sdata)) {
3881 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3882 struct ieee80211_event event = {
3883 .type = MLME_EVENT,
3884 .u.mlme.data = ASSOC_EVENT,
3885 .u.mlme.status = MLME_TIMEOUT,
3886 };
3887
3888 ieee80211_destroy_assoc_data(sdata, false);
3889 cfg80211_assoc_timeout(sdata->dev, bss);
3890 drv_event_callback(sdata->local, sdata, &event);
3891 }
3892 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3893 run_again(sdata, ifmgd->assoc_data->timeout);
3894
3895 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3896 ifmgd->associated) {
3897 u8 bssid[ETH_ALEN];
3898 int max_tries;
3899
3900 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3901
3902 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3903 max_tries = max_nullfunc_tries;
3904 else
3905 max_tries = max_probe_tries;
3906
3907 /* ACK received for nullfunc probing frame */
3908 if (!ifmgd->probe_send_count)
3909 ieee80211_reset_ap_probe(sdata);
3910 else if (ifmgd->nullfunc_failed) {
3911 if (ifmgd->probe_send_count < max_tries) {
3912 mlme_dbg(sdata,
3913 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3914 bssid, ifmgd->probe_send_count,
3915 max_tries);
3916 ieee80211_mgd_probe_ap_send(sdata);
3917 } else {
3918 mlme_dbg(sdata,
3919 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3920 bssid);
3921 ieee80211_sta_connection_lost(sdata, bssid,
3922 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3923 false);
3924 }
3925 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3926 run_again(sdata, ifmgd->probe_timeout);
3927 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3928 mlme_dbg(sdata,
3929 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3930 bssid, probe_wait_ms);
3931 ieee80211_sta_connection_lost(sdata, bssid,
3932 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3933 } else if (ifmgd->probe_send_count < max_tries) {
3934 mlme_dbg(sdata,
3935 "No probe response from AP %pM after %dms, try %d/%i\n",
3936 bssid, probe_wait_ms,
3937 ifmgd->probe_send_count, max_tries);
3938 ieee80211_mgd_probe_ap_send(sdata);
3939 } else {
3940 /*
3941 * We actually lost the connection ... or did we?
3942 * Let's make sure!
3943 */
3944 wiphy_debug(local->hw.wiphy,
3945 "%s: No probe response from AP %pM"
3946 " after %dms, disconnecting.\n",
3947 sdata->name,
3948 bssid, probe_wait_ms);
3949
3950 ieee80211_sta_connection_lost(sdata, bssid,
3951 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3952 }
3953 }
3954
3955 sdata_unlock(sdata);
3956 }
3957
3958 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3959 {
3960 struct ieee80211_sub_if_data *sdata =
3961 (struct ieee80211_sub_if_data *) data;
3962 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3963
3964 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3965 return;
3966
3967 sdata->u.mgd.connection_loss = false;
3968 ieee80211_queue_work(&sdata->local->hw,
3969 &sdata->u.mgd.beacon_connection_loss_work);
3970 }
3971
3972 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3973 {
3974 struct ieee80211_sub_if_data *sdata =
3975 (struct ieee80211_sub_if_data *) data;
3976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3977 struct ieee80211_local *local = sdata->local;
3978
3979 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3980 return;
3981
3982 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3983 }
3984
3985 static void ieee80211_sta_monitor_work(struct work_struct *work)
3986 {
3987 struct ieee80211_sub_if_data *sdata =
3988 container_of(work, struct ieee80211_sub_if_data,
3989 u.mgd.monitor_work);
3990
3991 ieee80211_mgd_probe_ap(sdata, false);
3992 }
3993
3994 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3995 {
3996 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3997 __ieee80211_stop_poll(sdata);
3998
3999 /* let's probe the connection once */
4000 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4001 ieee80211_queue_work(&sdata->local->hw,
4002 &sdata->u.mgd.monitor_work);
4003 /* and do all the other regular work too */
4004 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4005 }
4006 }
4007
4008 #ifdef CONFIG_PM
4009 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4010 {
4011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4012 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4013
4014 sdata_lock(sdata);
4015
4016 if (ifmgd->auth_data || ifmgd->assoc_data) {
4017 const u8 *bssid = ifmgd->auth_data ?
4018 ifmgd->auth_data->bss->bssid :
4019 ifmgd->assoc_data->bss->bssid;
4020
4021 /*
4022 * If we are trying to authenticate / associate while suspending,
4023 * cfg80211 won't know and won't actually abort those attempts,
4024 * thus we need to do that ourselves.
4025 */
4026 ieee80211_send_deauth_disassoc(sdata, bssid,
4027 IEEE80211_STYPE_DEAUTH,
4028 WLAN_REASON_DEAUTH_LEAVING,
4029 false, frame_buf);
4030 if (ifmgd->assoc_data)
4031 ieee80211_destroy_assoc_data(sdata, false);
4032 if (ifmgd->auth_data)
4033 ieee80211_destroy_auth_data(sdata, false);
4034 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4035 IEEE80211_DEAUTH_FRAME_LEN);
4036 }
4037
4038 /* This is a bit of a hack - we should find a better and more generic
4039 * solution to this. Normally when suspending, cfg80211 will in fact
4040 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4041 * auth (not so important) or assoc (this is the problem) process.
4042 *
4043 * As a consequence, it can happen that we are in the process of both
4044 * associating and suspending, and receive an association response
4045 * after cfg80211 has checked if it needs to disconnect, but before
4046 * we actually set the flag to drop incoming frames. This will then
4047 * cause the workqueue flush to process the association response in
4048 * the suspend, resulting in a successful association just before it
4049 * tries to remove the interface from the driver, which now though
4050 * has a channel context assigned ... this results in issues.
4051 *
4052 * To work around this (for now) simply deauth here again if we're
4053 * now connected.
4054 */
4055 if (ifmgd->associated && !sdata->local->wowlan) {
4056 u8 bssid[ETH_ALEN];
4057 struct cfg80211_deauth_request req = {
4058 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4059 .bssid = bssid,
4060 };
4061
4062 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4063 ieee80211_mgd_deauth(sdata, &req);
4064 }
4065
4066 sdata_unlock(sdata);
4067 }
4068
4069 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4070 {
4071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4072
4073 sdata_lock(sdata);
4074 if (!ifmgd->associated) {
4075 sdata_unlock(sdata);
4076 return;
4077 }
4078
4079 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4080 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4081 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4082 ieee80211_sta_connection_lost(sdata,
4083 ifmgd->associated->bssid,
4084 WLAN_REASON_UNSPECIFIED,
4085 true);
4086 sdata_unlock(sdata);
4087 return;
4088 }
4089 sdata_unlock(sdata);
4090 }
4091 #endif
4092
4093 /* interface setup */
4094 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4095 {
4096 struct ieee80211_if_managed *ifmgd;
4097
4098 ifmgd = &sdata->u.mgd;
4099 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4100 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4101 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4102 ieee80211_beacon_connection_loss_work);
4103 INIT_WORK(&ifmgd->csa_connection_drop_work,
4104 ieee80211_csa_connection_drop_work);
4105 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4106 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4107 ieee80211_tdls_peer_del_work);
4108 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4109 (unsigned long) sdata);
4110 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4111 (unsigned long) sdata);
4112 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4113 (unsigned long) sdata);
4114 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4115 (unsigned long) sdata);
4116 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4117 ieee80211_sta_handle_tspec_ac_params_wk);
4118
4119 ifmgd->flags = 0;
4120 ifmgd->powersave = sdata->wdev.ps;
4121 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4122 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4123 ifmgd->p2p_noa_index = -1;
4124
4125 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4126 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4127 else
4128 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4129
4130 /* Setup TDLS data */
4131 spin_lock_init(&ifmgd->teardown_lock);
4132 ifmgd->teardown_skb = NULL;
4133 ifmgd->orig_teardown_skb = NULL;
4134 }
4135
4136 /* scan finished notification */
4137 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4138 {
4139 struct ieee80211_sub_if_data *sdata;
4140
4141 /* Restart STA timers */
4142 rcu_read_lock();
4143 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4144 if (ieee80211_sdata_running(sdata))
4145 ieee80211_restart_sta_timer(sdata);
4146 }
4147 rcu_read_unlock();
4148 }
4149
4150 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4151 struct cfg80211_bss *cbss)
4152 {
4153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4154 const u8 *ht_cap_ie, *vht_cap_ie;
4155 const struct ieee80211_ht_cap *ht_cap;
4156 const struct ieee80211_vht_cap *vht_cap;
4157 u8 chains = 1;
4158
4159 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4160 return chains;
4161
4162 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4163 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4164 ht_cap = (void *)(ht_cap_ie + 2);
4165 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4166 /*
4167 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4168 * "Tx Unequal Modulation Supported" fields.
4169 */
4170 }
4171
4172 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4173 return chains;
4174
4175 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4176 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4177 u8 nss;
4178 u16 tx_mcs_map;
4179
4180 vht_cap = (void *)(vht_cap_ie + 2);
4181 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4182 for (nss = 8; nss > 0; nss--) {
4183 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4184 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4185 break;
4186 }
4187 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4188 chains = max(chains, nss);
4189 }
4190
4191 return chains;
4192 }
4193
4194 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4195 struct cfg80211_bss *cbss)
4196 {
4197 struct ieee80211_local *local = sdata->local;
4198 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4199 const struct ieee80211_ht_cap *ht_cap = NULL;
4200 const struct ieee80211_ht_operation *ht_oper = NULL;
4201 const struct ieee80211_vht_operation *vht_oper = NULL;
4202 struct ieee80211_supported_band *sband;
4203 struct cfg80211_chan_def chandef;
4204 int ret;
4205 u32 i;
4206 bool have_80mhz;
4207
4208 sband = local->hw.wiphy->bands[cbss->channel->band];
4209
4210 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4211 IEEE80211_STA_DISABLE_80P80MHZ |
4212 IEEE80211_STA_DISABLE_160MHZ);
4213
4214 rcu_read_lock();
4215
4216 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4217 sband->ht_cap.ht_supported) {
4218 const u8 *ht_oper_ie, *ht_cap_ie;
4219
4220 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4221 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4222 ht_oper = (void *)(ht_oper_ie + 2);
4223
4224 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4225 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4226 ht_cap = (void *)(ht_cap_ie + 2);
4227
4228 if (!ht_cap) {
4229 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4230 ht_oper = NULL;
4231 }
4232 }
4233
4234 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4235 sband->vht_cap.vht_supported) {
4236 const u8 *vht_oper_ie, *vht_cap;
4237
4238 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4239 WLAN_EID_VHT_OPERATION);
4240 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4241 vht_oper = (void *)(vht_oper_ie + 2);
4242 if (vht_oper && !ht_oper) {
4243 vht_oper = NULL;
4244 sdata_info(sdata,
4245 "AP advertised VHT without HT, disabling both\n");
4246 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4247 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4248 }
4249
4250 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4251 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4252 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4253 vht_oper = NULL;
4254 }
4255 }
4256
4257 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4258 have_80mhz = false;
4259 for (i = 0; i < sband->n_channels; i++) {
4260 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4261 IEEE80211_CHAN_NO_80MHZ))
4262 continue;
4263
4264 have_80mhz = true;
4265 break;
4266 }
4267
4268 if (!have_80mhz)
4269 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4270
4271 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4272 cbss->channel,
4273 ht_cap, ht_oper, vht_oper,
4274 &chandef, false);
4275
4276 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4277 local->rx_chains);
4278
4279 rcu_read_unlock();
4280
4281 /* will change later if needed */
4282 sdata->smps_mode = IEEE80211_SMPS_OFF;
4283
4284 mutex_lock(&local->mtx);
4285 /*
4286 * If this fails (possibly due to channel context sharing
4287 * on incompatible channels, e.g. 80+80 and 160 sharing the
4288 * same control channel) try to use a smaller bandwidth.
4289 */
4290 ret = ieee80211_vif_use_channel(sdata, &chandef,
4291 IEEE80211_CHANCTX_SHARED);
4292
4293 /* don't downgrade for 5 and 10 MHz channels, though. */
4294 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4295 chandef.width == NL80211_CHAN_WIDTH_10)
4296 goto out;
4297
4298 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4299 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4300 ret = ieee80211_vif_use_channel(sdata, &chandef,
4301 IEEE80211_CHANCTX_SHARED);
4302 }
4303 out:
4304 mutex_unlock(&local->mtx);
4305 return ret;
4306 }
4307
4308 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4309 struct cfg80211_bss *cbss, bool assoc,
4310 bool override)
4311 {
4312 struct ieee80211_local *local = sdata->local;
4313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4314 struct ieee80211_bss *bss = (void *)cbss->priv;
4315 struct sta_info *new_sta = NULL;
4316 struct ieee80211_supported_band *sband;
4317 bool have_sta = false;
4318 int err;
4319
4320 sband = local->hw.wiphy->bands[cbss->channel->band];
4321
4322 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4323 return -EINVAL;
4324
4325 if (assoc) {
4326 rcu_read_lock();
4327 have_sta = sta_info_get(sdata, cbss->bssid);
4328 rcu_read_unlock();
4329 }
4330
4331 if (!have_sta) {
4332 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4333 if (!new_sta)
4334 return -ENOMEM;
4335 }
4336
4337 if (new_sta || override) {
4338 err = ieee80211_prep_channel(sdata, cbss);
4339 if (err) {
4340 if (new_sta)
4341 sta_info_free(local, new_sta);
4342 return -EINVAL;
4343 }
4344 }
4345
4346 if (new_sta) {
4347 u32 rates = 0, basic_rates = 0;
4348 bool have_higher_than_11mbit;
4349 int min_rate = INT_MAX, min_rate_index = -1;
4350 struct ieee80211_chanctx_conf *chanctx_conf;
4351 const struct cfg80211_bss_ies *ies;
4352 int shift = ieee80211_vif_get_shift(&sdata->vif);
4353 u32 rate_flags;
4354
4355 rcu_read_lock();
4356 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4357 if (WARN_ON(!chanctx_conf)) {
4358 rcu_read_unlock();
4359 sta_info_free(local, new_sta);
4360 return -EINVAL;
4361 }
4362 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4363 rcu_read_unlock();
4364
4365 ieee80211_get_rates(sband, bss->supp_rates,
4366 bss->supp_rates_len,
4367 &rates, &basic_rates,
4368 &have_higher_than_11mbit,
4369 &min_rate, &min_rate_index,
4370 shift, rate_flags);
4371
4372 /*
4373 * This used to be a workaround for basic rates missing
4374 * in the association response frame. Now that we no
4375 * longer use the basic rates from there, it probably
4376 * doesn't happen any more, but keep the workaround so
4377 * in case some *other* APs are buggy in different ways
4378 * we can connect -- with a warning.
4379 */
4380 if (!basic_rates && min_rate_index >= 0) {
4381 sdata_info(sdata,
4382 "No basic rates, using min rate instead\n");
4383 basic_rates = BIT(min_rate_index);
4384 }
4385
4386 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4387 sdata->vif.bss_conf.basic_rates = basic_rates;
4388
4389 /* cf. IEEE 802.11 9.2.12 */
4390 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4391 have_higher_than_11mbit)
4392 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4393 else
4394 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4395
4396 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4397
4398 /* set timing information */
4399 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4400 rcu_read_lock();
4401 ies = rcu_dereference(cbss->beacon_ies);
4402 if (ies) {
4403 const u8 *tim_ie;
4404
4405 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4406 sdata->vif.bss_conf.sync_device_ts =
4407 bss->device_ts_beacon;
4408 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4409 ies->data, ies->len);
4410 if (tim_ie && tim_ie[1] >= 2)
4411 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4412 else
4413 sdata->vif.bss_conf.sync_dtim_count = 0;
4414 } else if (!ieee80211_hw_check(&sdata->local->hw,
4415 TIMING_BEACON_ONLY)) {
4416 ies = rcu_dereference(cbss->proberesp_ies);
4417 /* must be non-NULL since beacon IEs were NULL */
4418 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4419 sdata->vif.bss_conf.sync_device_ts =
4420 bss->device_ts_presp;
4421 sdata->vif.bss_conf.sync_dtim_count = 0;
4422 } else {
4423 sdata->vif.bss_conf.sync_tsf = 0;
4424 sdata->vif.bss_conf.sync_device_ts = 0;
4425 sdata->vif.bss_conf.sync_dtim_count = 0;
4426 }
4427 rcu_read_unlock();
4428
4429 /* tell driver about BSSID, basic rates and timing */
4430 ieee80211_bss_info_change_notify(sdata,
4431 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4432 BSS_CHANGED_BEACON_INT);
4433
4434 if (assoc)
4435 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4436
4437 err = sta_info_insert(new_sta);
4438 new_sta = NULL;
4439 if (err) {
4440 sdata_info(sdata,
4441 "failed to insert STA entry for the AP (error %d)\n",
4442 err);
4443 return err;
4444 }
4445 } else
4446 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4447
4448 /* Cancel scan to ensure that nothing interferes with connection */
4449 if (local->scanning)
4450 ieee80211_scan_cancel(local);
4451
4452 return 0;
4453 }
4454
4455 /* config hooks */
4456 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4457 struct cfg80211_auth_request *req)
4458 {
4459 struct ieee80211_local *local = sdata->local;
4460 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4461 struct ieee80211_mgd_auth_data *auth_data;
4462 u16 auth_alg;
4463 int err;
4464
4465 /* prepare auth data structure */
4466
4467 switch (req->auth_type) {
4468 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4469 auth_alg = WLAN_AUTH_OPEN;
4470 break;
4471 case NL80211_AUTHTYPE_SHARED_KEY:
4472 if (IS_ERR(local->wep_tx_tfm))
4473 return -EOPNOTSUPP;
4474 auth_alg = WLAN_AUTH_SHARED_KEY;
4475 break;
4476 case NL80211_AUTHTYPE_FT:
4477 auth_alg = WLAN_AUTH_FT;
4478 break;
4479 case NL80211_AUTHTYPE_NETWORK_EAP:
4480 auth_alg = WLAN_AUTH_LEAP;
4481 break;
4482 case NL80211_AUTHTYPE_SAE:
4483 auth_alg = WLAN_AUTH_SAE;
4484 break;
4485 default:
4486 return -EOPNOTSUPP;
4487 }
4488
4489 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4490 req->ie_len, GFP_KERNEL);
4491 if (!auth_data)
4492 return -ENOMEM;
4493
4494 auth_data->bss = req->bss;
4495
4496 if (req->sae_data_len >= 4) {
4497 __le16 *pos = (__le16 *) req->sae_data;
4498 auth_data->sae_trans = le16_to_cpu(pos[0]);
4499 auth_data->sae_status = le16_to_cpu(pos[1]);
4500 memcpy(auth_data->data, req->sae_data + 4,
4501 req->sae_data_len - 4);
4502 auth_data->data_len += req->sae_data_len - 4;
4503 }
4504
4505 if (req->ie && req->ie_len) {
4506 memcpy(&auth_data->data[auth_data->data_len],
4507 req->ie, req->ie_len);
4508 auth_data->data_len += req->ie_len;
4509 }
4510
4511 if (req->key && req->key_len) {
4512 auth_data->key_len = req->key_len;
4513 auth_data->key_idx = req->key_idx;
4514 memcpy(auth_data->key, req->key, req->key_len);
4515 }
4516
4517 auth_data->algorithm = auth_alg;
4518
4519 /* try to authenticate/probe */
4520
4521 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4522 ifmgd->assoc_data) {
4523 err = -EBUSY;
4524 goto err_free;
4525 }
4526
4527 if (ifmgd->auth_data)
4528 ieee80211_destroy_auth_data(sdata, false);
4529
4530 /* prep auth_data so we don't go into idle on disassoc */
4531 ifmgd->auth_data = auth_data;
4532
4533 if (ifmgd->associated) {
4534 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4535
4536 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4537 WLAN_REASON_UNSPECIFIED,
4538 false, frame_buf);
4539
4540 ieee80211_report_disconnect(sdata, frame_buf,
4541 sizeof(frame_buf), true,
4542 WLAN_REASON_UNSPECIFIED);
4543 }
4544
4545 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4546
4547 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4548 if (err)
4549 goto err_clear;
4550
4551 err = ieee80211_auth(sdata);
4552 if (err) {
4553 sta_info_destroy_addr(sdata, req->bss->bssid);
4554 goto err_clear;
4555 }
4556
4557 /* hold our own reference */
4558 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4559 return 0;
4560
4561 err_clear:
4562 eth_zero_addr(ifmgd->bssid);
4563 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4564 ifmgd->auth_data = NULL;
4565 mutex_lock(&sdata->local->mtx);
4566 ieee80211_vif_release_channel(sdata);
4567 mutex_unlock(&sdata->local->mtx);
4568 err_free:
4569 kfree(auth_data);
4570 return err;
4571 }
4572
4573 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4574 struct cfg80211_assoc_request *req)
4575 {
4576 struct ieee80211_local *local = sdata->local;
4577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4578 struct ieee80211_bss *bss = (void *)req->bss->priv;
4579 struct ieee80211_mgd_assoc_data *assoc_data;
4580 const struct cfg80211_bss_ies *beacon_ies;
4581 struct ieee80211_supported_band *sband;
4582 const u8 *ssidie, *ht_ie, *vht_ie;
4583 int i, err;
4584 bool override = false;
4585
4586 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4587 if (!assoc_data)
4588 return -ENOMEM;
4589
4590 rcu_read_lock();
4591 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4592 if (!ssidie) {
4593 rcu_read_unlock();
4594 kfree(assoc_data);
4595 return -EINVAL;
4596 }
4597 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4598 assoc_data->ssid_len = ssidie[1];
4599 rcu_read_unlock();
4600
4601 if (ifmgd->associated) {
4602 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4603
4604 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4605 WLAN_REASON_UNSPECIFIED,
4606 false, frame_buf);
4607
4608 ieee80211_report_disconnect(sdata, frame_buf,
4609 sizeof(frame_buf), true,
4610 WLAN_REASON_UNSPECIFIED);
4611 }
4612
4613 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4614 err = -EBUSY;
4615 goto err_free;
4616 }
4617
4618 if (ifmgd->assoc_data) {
4619 err = -EBUSY;
4620 goto err_free;
4621 }
4622
4623 if (ifmgd->auth_data) {
4624 bool match;
4625
4626 /* keep sta info, bssid if matching */
4627 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4628 ieee80211_destroy_auth_data(sdata, match);
4629 }
4630
4631 /* prepare assoc data */
4632
4633 ifmgd->beacon_crc_valid = false;
4634
4635 assoc_data->wmm = bss->wmm_used &&
4636 (local->hw.queues >= IEEE80211_NUM_ACS);
4637
4638 /*
4639 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4640 * We still associate in non-HT mode (11a/b/g) if any one of these
4641 * ciphers is configured as pairwise.
4642 * We can set this to true for non-11n hardware, that'll be checked
4643 * separately along with the peer capabilities.
4644 */
4645 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4646 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4647 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4648 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4649 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4650 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4651 netdev_info(sdata->dev,
4652 "disabling HT/VHT due to WEP/TKIP use\n");
4653 }
4654 }
4655
4656 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4657 sband = local->hw.wiphy->bands[req->bss->channel->band];
4658 if (!sband->ht_cap.ht_supported ||
4659 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4660 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4661 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4662 if (!bss->wmm_used &&
4663 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4664 netdev_info(sdata->dev,
4665 "disabling HT as WMM/QoS is not supported by the AP\n");
4666 }
4667
4668 /* disable VHT if we don't support it or the AP doesn't use WMM */
4669 if (!sband->vht_cap.vht_supported ||
4670 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4671 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4672 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4673 if (!bss->wmm_used &&
4674 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4675 netdev_info(sdata->dev,
4676 "disabling VHT as WMM/QoS is not supported by the AP\n");
4677 }
4678
4679 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4680 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4681 sizeof(ifmgd->ht_capa_mask));
4682
4683 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4684 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4685 sizeof(ifmgd->vht_capa_mask));
4686
4687 if (req->ie && req->ie_len) {
4688 memcpy(assoc_data->ie, req->ie, req->ie_len);
4689 assoc_data->ie_len = req->ie_len;
4690 }
4691
4692 assoc_data->bss = req->bss;
4693
4694 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4695 if (ifmgd->powersave)
4696 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4697 else
4698 sdata->smps_mode = IEEE80211_SMPS_OFF;
4699 } else
4700 sdata->smps_mode = ifmgd->req_smps;
4701
4702 assoc_data->capability = req->bss->capability;
4703 assoc_data->supp_rates = bss->supp_rates;
4704 assoc_data->supp_rates_len = bss->supp_rates_len;
4705
4706 rcu_read_lock();
4707 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4708 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4709 assoc_data->ap_ht_param =
4710 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4711 else
4712 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4713 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4714 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4715 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4716 sizeof(struct ieee80211_vht_cap));
4717 else
4718 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4719 rcu_read_unlock();
4720
4721 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4722 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4723 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4724 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4725
4726 if (bss->wmm_used && bss->uapsd_supported &&
4727 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4728 assoc_data->uapsd = true;
4729 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4730 } else {
4731 assoc_data->uapsd = false;
4732 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4733 }
4734
4735 if (req->prev_bssid)
4736 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4737
4738 if (req->use_mfp) {
4739 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4740 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4741 } else {
4742 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4743 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4744 }
4745
4746 if (req->flags & ASSOC_REQ_USE_RRM)
4747 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4748 else
4749 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4750
4751 if (req->crypto.control_port)
4752 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4753 else
4754 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4755
4756 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4757 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4758 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4759 sdata->vif.type);
4760
4761 /* kick off associate process */
4762
4763 ifmgd->assoc_data = assoc_data;
4764 ifmgd->dtim_period = 0;
4765 ifmgd->have_beacon = false;
4766
4767 /* override HT/VHT configuration only if the AP and we support it */
4768 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4769 struct ieee80211_sta_ht_cap sta_ht_cap;
4770
4771 if (req->flags & ASSOC_REQ_DISABLE_HT)
4772 override = true;
4773
4774 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4775 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4776
4777 /* check for 40 MHz disable override */
4778 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4779 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4780 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4781 override = true;
4782
4783 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4784 req->flags & ASSOC_REQ_DISABLE_VHT)
4785 override = true;
4786 }
4787
4788 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4789 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4790 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4791 }
4792
4793 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4794 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4795
4796 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4797 if (err)
4798 goto err_clear;
4799
4800 rcu_read_lock();
4801 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4802
4803 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4804 !beacon_ies) {
4805 /*
4806 * Wait up to one beacon interval ...
4807 * should this be more if we miss one?
4808 */
4809 sdata_info(sdata, "waiting for beacon from %pM\n",
4810 ifmgd->bssid);
4811 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4812 assoc_data->timeout_started = true;
4813 assoc_data->need_beacon = true;
4814 } else if (beacon_ies) {
4815 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4816 beacon_ies->data,
4817 beacon_ies->len);
4818 u8 dtim_count = 0;
4819
4820 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4821 const struct ieee80211_tim_ie *tim;
4822 tim = (void *)(tim_ie + 2);
4823 ifmgd->dtim_period = tim->dtim_period;
4824 dtim_count = tim->dtim_count;
4825 }
4826 ifmgd->have_beacon = true;
4827 assoc_data->timeout = jiffies;
4828 assoc_data->timeout_started = true;
4829
4830 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4831 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4832 sdata->vif.bss_conf.sync_device_ts =
4833 bss->device_ts_beacon;
4834 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4835 }
4836 } else {
4837 assoc_data->timeout = jiffies;
4838 assoc_data->timeout_started = true;
4839 }
4840 rcu_read_unlock();
4841
4842 run_again(sdata, assoc_data->timeout);
4843
4844 if (bss->corrupt_data) {
4845 char *corrupt_type = "data";
4846 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4847 if (bss->corrupt_data &
4848 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4849 corrupt_type = "beacon and probe response";
4850 else
4851 corrupt_type = "beacon";
4852 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4853 corrupt_type = "probe response";
4854 sdata_info(sdata, "associating with AP with corrupt %s\n",
4855 corrupt_type);
4856 }
4857
4858 return 0;
4859 err_clear:
4860 eth_zero_addr(ifmgd->bssid);
4861 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4862 ifmgd->assoc_data = NULL;
4863 err_free:
4864 kfree(assoc_data);
4865 return err;
4866 }
4867
4868 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4869 struct cfg80211_deauth_request *req)
4870 {
4871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4872 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4873 bool tx = !req->local_state_change;
4874
4875 if (ifmgd->auth_data &&
4876 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4877 sdata_info(sdata,
4878 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4879 req->bssid, req->reason_code,
4880 ieee80211_get_reason_code_string(req->reason_code));
4881
4882 drv_mgd_prepare_tx(sdata->local, sdata);
4883 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4884 IEEE80211_STYPE_DEAUTH,
4885 req->reason_code, tx,
4886 frame_buf);
4887 ieee80211_destroy_auth_data(sdata, false);
4888 ieee80211_report_disconnect(sdata, frame_buf,
4889 sizeof(frame_buf), true,
4890 req->reason_code);
4891
4892 return 0;
4893 }
4894
4895 if (ifmgd->assoc_data &&
4896 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4897 sdata_info(sdata,
4898 "aborting association 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_assoc_data(sdata, false);
4908 ieee80211_report_disconnect(sdata, frame_buf,
4909 sizeof(frame_buf), true,
4910 req->reason_code);
4911 return 0;
4912 }
4913
4914 if (ifmgd->associated &&
4915 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4916 sdata_info(sdata,
4917 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4918 req->bssid, req->reason_code,
4919 ieee80211_get_reason_code_string(req->reason_code));
4920
4921 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4922 req->reason_code, tx, frame_buf);
4923 ieee80211_report_disconnect(sdata, frame_buf,
4924 sizeof(frame_buf), true,
4925 req->reason_code);
4926 return 0;
4927 }
4928
4929 return -ENOTCONN;
4930 }
4931
4932 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4933 struct cfg80211_disassoc_request *req)
4934 {
4935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4936 u8 bssid[ETH_ALEN];
4937 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4938
4939 /*
4940 * cfg80211 should catch this ... but it's racy since
4941 * we can receive a disassoc frame, process it, hand it
4942 * to cfg80211 while that's in a locked section already
4943 * trying to tell us that the user wants to disconnect.
4944 */
4945 if (ifmgd->associated != req->bss)
4946 return -ENOLINK;
4947
4948 sdata_info(sdata,
4949 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4950 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4951
4952 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4953 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4954 req->reason_code, !req->local_state_change,
4955 frame_buf);
4956
4957 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4958 req->reason_code);
4959
4960 return 0;
4961 }
4962
4963 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4964 {
4965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4966
4967 /*
4968 * Make sure some work items will not run after this,
4969 * they will not do anything but might not have been
4970 * cancelled when disconnecting.
4971 */
4972 cancel_work_sync(&ifmgd->monitor_work);
4973 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4974 cancel_work_sync(&ifmgd->request_smps_work);
4975 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4976 cancel_work_sync(&ifmgd->chswitch_work);
4977 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4978
4979 sdata_lock(sdata);
4980 if (ifmgd->assoc_data) {
4981 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4982 ieee80211_destroy_assoc_data(sdata, false);
4983 cfg80211_assoc_timeout(sdata->dev, bss);
4984 }
4985 if (ifmgd->auth_data)
4986 ieee80211_destroy_auth_data(sdata, false);
4987 spin_lock_bh(&ifmgd->teardown_lock);
4988 if (ifmgd->teardown_skb) {
4989 kfree_skb(ifmgd->teardown_skb);
4990 ifmgd->teardown_skb = NULL;
4991 ifmgd->orig_teardown_skb = NULL;
4992 }
4993 spin_unlock_bh(&ifmgd->teardown_lock);
4994 del_timer_sync(&ifmgd->timer);
4995 sdata_unlock(sdata);
4996 }
4997
4998 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4999 enum nl80211_cqm_rssi_threshold_event rssi_event,
5000 gfp_t gfp)
5001 {
5002 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5003
5004 trace_api_cqm_rssi_notify(sdata, rssi_event);
5005
5006 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5007 }
5008 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5009
5010 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5011 {
5012 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5013
5014 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5015
5016 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5017 }
5018 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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