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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / net / mac80211 / mlme.c
blob3aa04344942bfc06c75341abf841646745c58c7f
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 new_ap_level = pwr_level_80211h;
1383
1384 if (sdata->ap_power_level == new_ap_level)
1385 return 0;
1386
1387 sdata_dbg(sdata,
1388 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1389 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1390 sdata->u.mgd.bssid);
1391 } else { /* has_cisco_pwr is always true here. */
1392 new_ap_level = pwr_level_cisco;
1393
1394 if (sdata->ap_power_level == new_ap_level)
1395 return 0;
1396
1397 sdata_dbg(sdata,
1398 "Limiting TX power to %d dBm as advertised by %pM\n",
1399 pwr_level_cisco, sdata->u.mgd.bssid);
1400 }
1401
1402 sdata->ap_power_level = new_ap_level;
1403 if (__ieee80211_recalc_txpower(sdata))
1404 return BSS_CHANGED_TXPOWER;
1405 return 0;
1406 }
1407
1408 /* powersave */
1409 static void ieee80211_enable_ps(struct ieee80211_local *local,
1410 struct ieee80211_sub_if_data *sdata)
1411 {
1412 struct ieee80211_conf *conf = &local->hw.conf;
1413
1414 /*
1415 * If we are scanning right now then the parameters will
1416 * take effect when scan finishes.
1417 */
1418 if (local->scanning)
1419 return;
1420
1421 if (conf->dynamic_ps_timeout > 0 &&
1422 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1423 mod_timer(&local->dynamic_ps_timer, jiffies +
1424 msecs_to_jiffies(conf->dynamic_ps_timeout));
1425 } else {
1426 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1427 ieee80211_send_nullfunc(local, sdata, true);
1428
1429 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1430 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1431 return;
1432
1433 conf->flags |= IEEE80211_CONF_PS;
1434 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1435 }
1436 }
1437
1438 static void ieee80211_change_ps(struct ieee80211_local *local)
1439 {
1440 struct ieee80211_conf *conf = &local->hw.conf;
1441
1442 if (local->ps_sdata) {
1443 ieee80211_enable_ps(local, local->ps_sdata);
1444 } else if (conf->flags & IEEE80211_CONF_PS) {
1445 conf->flags &= ~IEEE80211_CONF_PS;
1446 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1447 del_timer_sync(&local->dynamic_ps_timer);
1448 cancel_work_sync(&local->dynamic_ps_enable_work);
1449 }
1450 }
1451
1452 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1453 {
1454 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1455 struct sta_info *sta = NULL;
1456 bool authorized = false;
1457
1458 if (!mgd->powersave)
1459 return false;
1460
1461 if (mgd->broken_ap)
1462 return false;
1463
1464 if (!mgd->associated)
1465 return false;
1466
1467 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1468 return false;
1469
1470 if (!mgd->have_beacon)
1471 return false;
1472
1473 rcu_read_lock();
1474 sta = sta_info_get(sdata, mgd->bssid);
1475 if (sta)
1476 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1477 rcu_read_unlock();
1478
1479 return authorized;
1480 }
1481
1482 /* need to hold RTNL or interface lock */
1483 void ieee80211_recalc_ps(struct ieee80211_local *local)
1484 {
1485 struct ieee80211_sub_if_data *sdata, *found = NULL;
1486 int count = 0;
1487 int timeout;
1488
1489 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1490 local->ps_sdata = NULL;
1491 return;
1492 }
1493
1494 list_for_each_entry(sdata, &local->interfaces, list) {
1495 if (!ieee80211_sdata_running(sdata))
1496 continue;
1497 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1498 /* If an AP vif is found, then disable PS
1499 * by setting the count to zero thereby setting
1500 * ps_sdata to NULL.
1501 */
1502 count = 0;
1503 break;
1504 }
1505 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1506 continue;
1507 found = sdata;
1508 count++;
1509 }
1510
1511 if (count == 1 && ieee80211_powersave_allowed(found)) {
1512 u8 dtimper = found->u.mgd.dtim_period;
1513 s32 beaconint_us;
1514
1515 beaconint_us = ieee80211_tu_to_usec(
1516 found->vif.bss_conf.beacon_int);
1517
1518 timeout = local->dynamic_ps_forced_timeout;
1519 if (timeout < 0)
1520 timeout = 100;
1521 local->hw.conf.dynamic_ps_timeout = timeout;
1522
1523 /* If the TIM IE is invalid, pretend the value is 1 */
1524 if (!dtimper)
1525 dtimper = 1;
1526
1527 local->hw.conf.ps_dtim_period = dtimper;
1528 local->ps_sdata = found;
1529 } else {
1530 local->ps_sdata = NULL;
1531 }
1532
1533 ieee80211_change_ps(local);
1534 }
1535
1536 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1537 {
1538 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1539
1540 if (sdata->vif.bss_conf.ps != ps_allowed) {
1541 sdata->vif.bss_conf.ps = ps_allowed;
1542 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1543 }
1544 }
1545
1546 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1547 {
1548 struct ieee80211_local *local =
1549 container_of(work, struct ieee80211_local,
1550 dynamic_ps_disable_work);
1551
1552 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1553 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1554 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1555 }
1556
1557 ieee80211_wake_queues_by_reason(&local->hw,
1558 IEEE80211_MAX_QUEUE_MAP,
1559 IEEE80211_QUEUE_STOP_REASON_PS,
1560 false);
1561 }
1562
1563 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1564 {
1565 struct ieee80211_local *local =
1566 container_of(work, struct ieee80211_local,
1567 dynamic_ps_enable_work);
1568 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1569 struct ieee80211_if_managed *ifmgd;
1570 unsigned long flags;
1571 int q;
1572
1573 /* can only happen when PS was just disabled anyway */
1574 if (!sdata)
1575 return;
1576
1577 ifmgd = &sdata->u.mgd;
1578
1579 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1580 return;
1581
1582 if (local->hw.conf.dynamic_ps_timeout > 0) {
1583 /* don't enter PS if TX frames are pending */
1584 if (drv_tx_frames_pending(local)) {
1585 mod_timer(&local->dynamic_ps_timer, jiffies +
1586 msecs_to_jiffies(
1587 local->hw.conf.dynamic_ps_timeout));
1588 return;
1589 }
1590
1591 /*
1592 * transmission can be stopped by others which leads to
1593 * dynamic_ps_timer expiry. Postpone the ps timer if it
1594 * is not the actual idle state.
1595 */
1596 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1597 for (q = 0; q < local->hw.queues; q++) {
1598 if (local->queue_stop_reasons[q]) {
1599 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1600 flags);
1601 mod_timer(&local->dynamic_ps_timer, jiffies +
1602 msecs_to_jiffies(
1603 local->hw.conf.dynamic_ps_timeout));
1604 return;
1605 }
1606 }
1607 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1608 }
1609
1610 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1611 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1612 if (drv_tx_frames_pending(local)) {
1613 mod_timer(&local->dynamic_ps_timer, jiffies +
1614 msecs_to_jiffies(
1615 local->hw.conf.dynamic_ps_timeout));
1616 } else {
1617 ieee80211_send_nullfunc(local, sdata, true);
1618 /* Flush to get the tx status of nullfunc frame */
1619 ieee80211_flush_queues(local, sdata, false);
1620 }
1621 }
1622
1623 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1624 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1625 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1626 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1627 local->hw.conf.flags |= IEEE80211_CONF_PS;
1628 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1629 }
1630 }
1631
1632 void ieee80211_dynamic_ps_timer(unsigned long data)
1633 {
1634 struct ieee80211_local *local = (void *) data;
1635
1636 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1637 }
1638
1639 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1640 {
1641 struct delayed_work *delayed_work =
1642 container_of(work, struct delayed_work, work);
1643 struct ieee80211_sub_if_data *sdata =
1644 container_of(delayed_work, struct ieee80211_sub_if_data,
1645 dfs_cac_timer_work);
1646 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1647
1648 mutex_lock(&sdata->local->mtx);
1649 if (sdata->wdev.cac_started) {
1650 ieee80211_vif_release_channel(sdata);
1651 cfg80211_cac_event(sdata->dev, &chandef,
1652 NL80211_RADAR_CAC_FINISHED,
1653 GFP_KERNEL);
1654 }
1655 mutex_unlock(&sdata->local->mtx);
1656 }
1657
1658 static bool
1659 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1660 {
1661 struct ieee80211_local *local = sdata->local;
1662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1663 bool ret = false;
1664 int ac;
1665
1666 if (local->hw.queues < IEEE80211_NUM_ACS)
1667 return false;
1668
1669 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1670 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1671 int non_acm_ac;
1672 unsigned long now = jiffies;
1673
1674 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1675 tx_tspec->admitted_time &&
1676 time_after(now, tx_tspec->time_slice_start + HZ)) {
1677 tx_tspec->consumed_tx_time = 0;
1678 tx_tspec->time_slice_start = now;
1679
1680 if (tx_tspec->downgraded)
1681 tx_tspec->action =
1682 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1683 }
1684
1685 switch (tx_tspec->action) {
1686 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1687 /* take the original parameters */
1688 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1689 sdata_err(sdata,
1690 "failed to set TX queue parameters for queue %d\n",
1691 ac);
1692 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1693 tx_tspec->downgraded = false;
1694 ret = true;
1695 break;
1696 case TX_TSPEC_ACTION_DOWNGRADE:
1697 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1698 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1699 ret = true;
1700 break;
1701 }
1702 /* downgrade next lower non-ACM AC */
1703 for (non_acm_ac = ac + 1;
1704 non_acm_ac < IEEE80211_NUM_ACS;
1705 non_acm_ac++)
1706 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1707 break;
1708 /* The loop will result in using BK even if it requires
1709 * admission control, such configuration makes no sense
1710 * and we have to transmit somehow - the AC selection
1711 * does the same thing.
1712 */
1713 if (drv_conf_tx(local, sdata, ac,
1714 &sdata->tx_conf[non_acm_ac]))
1715 sdata_err(sdata,
1716 "failed to set TX queue parameters for queue %d\n",
1717 ac);
1718 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1719 ret = true;
1720 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1721 tx_tspec->time_slice_start + HZ - now + 1);
1722 break;
1723 case TX_TSPEC_ACTION_NONE:
1724 /* nothing now */
1725 break;
1726 }
1727 }
1728
1729 return ret;
1730 }
1731
1732 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1733 {
1734 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1735 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1736 }
1737
1738 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1739 {
1740 struct ieee80211_sub_if_data *sdata;
1741
1742 sdata = container_of(work, struct ieee80211_sub_if_data,
1743 u.mgd.tx_tspec_wk.work);
1744 ieee80211_sta_handle_tspec_ac_params(sdata);
1745 }
1746
1747 /* MLME */
1748 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1749 struct ieee80211_sub_if_data *sdata,
1750 const u8 *wmm_param, size_t wmm_param_len)
1751 {
1752 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1754 size_t left;
1755 int count, ac;
1756 const u8 *pos;
1757 u8 uapsd_queues = 0;
1758
1759 if (!local->ops->conf_tx)
1760 return false;
1761
1762 if (local->hw.queues < IEEE80211_NUM_ACS)
1763 return false;
1764
1765 if (!wmm_param)
1766 return false;
1767
1768 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1769 return false;
1770
1771 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1772 uapsd_queues = ifmgd->uapsd_queues;
1773
1774 count = wmm_param[6] & 0x0f;
1775 if (count == ifmgd->wmm_last_param_set)
1776 return false;
1777 ifmgd->wmm_last_param_set = count;
1778
1779 pos = wmm_param + 8;
1780 left = wmm_param_len - 8;
1781
1782 memset(&params, 0, sizeof(params));
1783
1784 sdata->wmm_acm = 0;
1785 for (; left >= 4; left -= 4, pos += 4) {
1786 int aci = (pos[0] >> 5) & 0x03;
1787 int acm = (pos[0] >> 4) & 0x01;
1788 bool uapsd = false;
1789
1790 switch (aci) {
1791 case 1: /* AC_BK */
1792 ac = IEEE80211_AC_BK;
1793 if (acm)
1794 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1795 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1796 uapsd = true;
1797 break;
1798 case 2: /* AC_VI */
1799 ac = IEEE80211_AC_VI;
1800 if (acm)
1801 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1802 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1803 uapsd = true;
1804 break;
1805 case 3: /* AC_VO */
1806 ac = IEEE80211_AC_VO;
1807 if (acm)
1808 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1809 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1810 uapsd = true;
1811 break;
1812 case 0: /* AC_BE */
1813 default:
1814 ac = IEEE80211_AC_BE;
1815 if (acm)
1816 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1817 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1818 uapsd = true;
1819 break;
1820 }
1821
1822 params[ac].aifs = pos[0] & 0x0f;
1823
1824 if (params[ac].aifs < 2) {
1825 sdata_info(sdata,
1826 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1827 params[ac].aifs, aci);
1828 params[ac].aifs = 2;
1829 }
1830 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1831 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1832 params[ac].txop = get_unaligned_le16(pos + 2);
1833 params[ac].acm = acm;
1834 params[ac].uapsd = uapsd;
1835
1836 if (params[ac].cw_min > params[ac].cw_max) {
1837 sdata_info(sdata,
1838 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1839 params[ac].cw_min, params[ac].cw_max, aci);
1840 return false;
1841 }
1842 }
1843
1844 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1845 mlme_dbg(sdata,
1846 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1847 ac, params[ac].acm,
1848 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1849 params[ac].txop, params[ac].uapsd,
1850 ifmgd->tx_tspec[ac].downgraded);
1851 sdata->tx_conf[ac] = params[ac];
1852 if (!ifmgd->tx_tspec[ac].downgraded &&
1853 drv_conf_tx(local, sdata, ac, &params[ac]))
1854 sdata_err(sdata,
1855 "failed to set TX queue parameters for AC %d\n",
1856 ac);
1857 }
1858
1859 /* enable WMM or activate new settings */
1860 sdata->vif.bss_conf.qos = true;
1861 return true;
1862 }
1863
1864 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1865 {
1866 lockdep_assert_held(&sdata->local->mtx);
1867
1868 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1869 ieee80211_run_deferred_scan(sdata->local);
1870 }
1871
1872 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1873 {
1874 mutex_lock(&sdata->local->mtx);
1875 __ieee80211_stop_poll(sdata);
1876 mutex_unlock(&sdata->local->mtx);
1877 }
1878
1879 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1880 u16 capab, bool erp_valid, u8 erp)
1881 {
1882 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1883 u32 changed = 0;
1884 bool use_protection;
1885 bool use_short_preamble;
1886 bool use_short_slot;
1887
1888 if (erp_valid) {
1889 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1890 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1891 } else {
1892 use_protection = false;
1893 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1894 }
1895
1896 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1897 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1898 use_short_slot = true;
1899
1900 if (use_protection != bss_conf->use_cts_prot) {
1901 bss_conf->use_cts_prot = use_protection;
1902 changed |= BSS_CHANGED_ERP_CTS_PROT;
1903 }
1904
1905 if (use_short_preamble != bss_conf->use_short_preamble) {
1906 bss_conf->use_short_preamble = use_short_preamble;
1907 changed |= BSS_CHANGED_ERP_PREAMBLE;
1908 }
1909
1910 if (use_short_slot != bss_conf->use_short_slot) {
1911 bss_conf->use_short_slot = use_short_slot;
1912 changed |= BSS_CHANGED_ERP_SLOT;
1913 }
1914
1915 return changed;
1916 }
1917
1918 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1919 struct cfg80211_bss *cbss,
1920 u32 bss_info_changed)
1921 {
1922 struct ieee80211_bss *bss = (void *)cbss->priv;
1923 struct ieee80211_local *local = sdata->local;
1924 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1925
1926 bss_info_changed |= BSS_CHANGED_ASSOC;
1927 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1928 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1929
1930 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1931 beacon_loss_count * bss_conf->beacon_int));
1932
1933 sdata->u.mgd.associated = cbss;
1934 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1935
1936 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1937
1938 if (sdata->vif.p2p) {
1939 const struct cfg80211_bss_ies *ies;
1940
1941 rcu_read_lock();
1942 ies = rcu_dereference(cbss->ies);
1943 if (ies) {
1944 int ret;
1945
1946 ret = cfg80211_get_p2p_attr(
1947 ies->data, ies->len,
1948 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1949 (u8 *) &bss_conf->p2p_noa_attr,
1950 sizeof(bss_conf->p2p_noa_attr));
1951 if (ret >= 2) {
1952 sdata->u.mgd.p2p_noa_index =
1953 bss_conf->p2p_noa_attr.index;
1954 bss_info_changed |= BSS_CHANGED_P2P_PS;
1955 }
1956 }
1957 rcu_read_unlock();
1958 }
1959
1960 /* just to be sure */
1961 ieee80211_stop_poll(sdata);
1962
1963 ieee80211_led_assoc(local, 1);
1964
1965 if (sdata->u.mgd.have_beacon) {
1966 /*
1967 * If the AP is buggy we may get here with no DTIM period
1968 * known, so assume it's 1 which is the only safe assumption
1969 * in that case, although if the TIM IE is broken powersave
1970 * probably just won't work at all.
1971 */
1972 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1973 bss_conf->beacon_rate = bss->beacon_rate;
1974 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1975 } else {
1976 bss_conf->beacon_rate = NULL;
1977 bss_conf->dtim_period = 0;
1978 }
1979
1980 bss_conf->assoc = 1;
1981
1982 /* Tell the driver to monitor connection quality (if supported) */
1983 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1984 bss_conf->cqm_rssi_thold)
1985 bss_info_changed |= BSS_CHANGED_CQM;
1986
1987 /* Enable ARP filtering */
1988 if (bss_conf->arp_addr_cnt)
1989 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1990
1991 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1992
1993 mutex_lock(&local->iflist_mtx);
1994 ieee80211_recalc_ps(local);
1995 mutex_unlock(&local->iflist_mtx);
1996
1997 ieee80211_recalc_smps(sdata);
1998 ieee80211_recalc_ps_vif(sdata);
1999
2000 netif_carrier_on(sdata->dev);
2001 }
2002
2003 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2004 u16 stype, u16 reason, bool tx,
2005 u8 *frame_buf)
2006 {
2007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2008 struct ieee80211_local *local = sdata->local;
2009 u32 changed = 0;
2010
2011 sdata_assert_lock(sdata);
2012
2013 if (WARN_ON_ONCE(tx && !frame_buf))
2014 return;
2015
2016 if (WARN_ON(!ifmgd->associated))
2017 return;
2018
2019 ieee80211_stop_poll(sdata);
2020
2021 ifmgd->associated = NULL;
2022 netif_carrier_off(sdata->dev);
2023
2024 /*
2025 * if we want to get out of ps before disassoc (why?) we have
2026 * to do it before sending disassoc, as otherwise the null-packet
2027 * won't be valid.
2028 */
2029 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2030 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2031 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2032 }
2033 local->ps_sdata = NULL;
2034
2035 /* disable per-vif ps */
2036 ieee80211_recalc_ps_vif(sdata);
2037
2038 /* make sure ongoing transmission finishes */
2039 synchronize_net();
2040
2041 /*
2042 * drop any frame before deauth/disassoc, this can be data or
2043 * management frame. Since we are disconnecting, we should not
2044 * insist sending these frames which can take time and delay
2045 * the disconnection and possible the roaming.
2046 */
2047 if (tx)
2048 ieee80211_flush_queues(local, sdata, true);
2049
2050 /* deauthenticate/disassociate now */
2051 if (tx || frame_buf)
2052 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2053 reason, tx, frame_buf);
2054
2055 /* flush out frame - make sure the deauth was actually sent */
2056 if (tx)
2057 ieee80211_flush_queues(local, sdata, false);
2058
2059 /* clear bssid only after building the needed mgmt frames */
2060 eth_zero_addr(ifmgd->bssid);
2061
2062 /* remove AP and TDLS peers */
2063 sta_info_flush(sdata);
2064
2065 /* finally reset all BSS / config parameters */
2066 changed |= ieee80211_reset_erp_info(sdata);
2067
2068 ieee80211_led_assoc(local, 0);
2069 changed |= BSS_CHANGED_ASSOC;
2070 sdata->vif.bss_conf.assoc = false;
2071
2072 ifmgd->p2p_noa_index = -1;
2073 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2074 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2075
2076 /* on the next assoc, re-program HT/VHT parameters */
2077 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2078 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2079 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2080 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2081 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2082
2083 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2084
2085 del_timer_sync(&local->dynamic_ps_timer);
2086 cancel_work_sync(&local->dynamic_ps_enable_work);
2087
2088 /* Disable ARP filtering */
2089 if (sdata->vif.bss_conf.arp_addr_cnt)
2090 changed |= BSS_CHANGED_ARP_FILTER;
2091
2092 sdata->vif.bss_conf.qos = false;
2093 changed |= BSS_CHANGED_QOS;
2094
2095 /* The BSSID (not really interesting) and HT changed */
2096 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2097 ieee80211_bss_info_change_notify(sdata, changed);
2098
2099 /* disassociated - set to defaults now */
2100 ieee80211_set_wmm_default(sdata, false, false);
2101
2102 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2103 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2104 del_timer_sync(&sdata->u.mgd.timer);
2105 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2106
2107 sdata->vif.bss_conf.dtim_period = 0;
2108 sdata->vif.bss_conf.beacon_rate = NULL;
2109
2110 ifmgd->have_beacon = false;
2111
2112 ifmgd->flags = 0;
2113 mutex_lock(&local->mtx);
2114 ieee80211_vif_release_channel(sdata);
2115
2116 sdata->vif.csa_active = false;
2117 ifmgd->csa_waiting_bcn = false;
2118 ifmgd->csa_ignored_same_chan = false;
2119 if (sdata->csa_block_tx) {
2120 ieee80211_wake_vif_queues(local, sdata,
2121 IEEE80211_QUEUE_STOP_REASON_CSA);
2122 sdata->csa_block_tx = false;
2123 }
2124 mutex_unlock(&local->mtx);
2125
2126 /* existing TX TSPEC sessions no longer exist */
2127 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2128 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2129
2130 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2131 }
2132
2133 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2134 struct ieee80211_hdr *hdr)
2135 {
2136 /*
2137 * We can postpone the mgd.timer whenever receiving unicast frames
2138 * from AP because we know that the connection is working both ways
2139 * at that time. But multicast frames (and hence also beacons) must
2140 * be ignored here, because we need to trigger the timer during
2141 * data idle periods for sending the periodic probe request to the
2142 * AP we're connected to.
2143 */
2144 if (is_multicast_ether_addr(hdr->addr1))
2145 return;
2146
2147 ieee80211_sta_reset_conn_monitor(sdata);
2148 }
2149
2150 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2151 {
2152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2153 struct ieee80211_local *local = sdata->local;
2154
2155 mutex_lock(&local->mtx);
2156 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2157 goto out;
2158
2159 __ieee80211_stop_poll(sdata);
2160
2161 mutex_lock(&local->iflist_mtx);
2162 ieee80211_recalc_ps(local);
2163 mutex_unlock(&local->iflist_mtx);
2164
2165 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2166 goto out;
2167
2168 /*
2169 * We've received a probe response, but are not sure whether
2170 * we have or will be receiving any beacons or data, so let's
2171 * schedule the timers again, just in case.
2172 */
2173 ieee80211_sta_reset_beacon_monitor(sdata);
2174
2175 mod_timer(&ifmgd->conn_mon_timer,
2176 round_jiffies_up(jiffies +
2177 IEEE80211_CONNECTION_IDLE_TIME));
2178 out:
2179 mutex_unlock(&local->mtx);
2180 }
2181
2182 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2183 struct ieee80211_hdr *hdr,
2184 u16 tx_time)
2185 {
2186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2187 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2188 int ac = ieee80211_ac_from_tid(tid);
2189 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2190 unsigned long now = jiffies;
2191
2192 if (likely(!tx_tspec->admitted_time))
2193 return;
2194
2195 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2196 tx_tspec->consumed_tx_time = 0;
2197 tx_tspec->time_slice_start = now;
2198
2199 if (tx_tspec->downgraded) {
2200 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2201 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2202 }
2203 }
2204
2205 if (tx_tspec->downgraded)
2206 return;
2207
2208 tx_tspec->consumed_tx_time += tx_time;
2209
2210 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2211 tx_tspec->downgraded = true;
2212 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2213 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2214 }
2215 }
2216
2217 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2218 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2219 {
2220 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2221
2222 if (!ieee80211_is_data(hdr->frame_control))
2223 return;
2224
2225 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2226 sdata->u.mgd.probe_send_count > 0) {
2227 if (ack)
2228 ieee80211_sta_reset_conn_monitor(sdata);
2229 else
2230 sdata->u.mgd.nullfunc_failed = true;
2231 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2232 return;
2233 }
2234
2235 if (ack)
2236 ieee80211_sta_reset_conn_monitor(sdata);
2237 }
2238
2239 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2240 {
2241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2242 const u8 *ssid;
2243 u8 *dst = ifmgd->associated->bssid;
2244 u8 unicast_limit = max(1, max_probe_tries - 3);
2245
2246 /*
2247 * Try sending broadcast probe requests for the last three
2248 * probe requests after the first ones failed since some
2249 * buggy APs only support broadcast probe requests.
2250 */
2251 if (ifmgd->probe_send_count >= unicast_limit)
2252 dst = NULL;
2253
2254 /*
2255 * When the hardware reports an accurate Tx ACK status, it's
2256 * better to send a nullfunc frame instead of a probe request,
2257 * as it will kick us off the AP quickly if we aren't associated
2258 * anymore. The timeout will be reset if the frame is ACKed by
2259 * the AP.
2260 */
2261 ifmgd->probe_send_count++;
2262
2263 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2264 ifmgd->nullfunc_failed = false;
2265 ieee80211_send_nullfunc(sdata->local, sdata, false);
2266 } else {
2267 int ssid_len;
2268
2269 rcu_read_lock();
2270 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2271 if (WARN_ON_ONCE(ssid == NULL))
2272 ssid_len = 0;
2273 else
2274 ssid_len = ssid[1];
2275
2276 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2277 ssid + 2, ssid_len, NULL,
2278 0, (u32) -1, true, 0,
2279 ifmgd->associated->channel, false);
2280 rcu_read_unlock();
2281 }
2282
2283 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2284 run_again(sdata, ifmgd->probe_timeout);
2285 }
2286
2287 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2288 bool beacon)
2289 {
2290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2291 bool already = false;
2292
2293 if (!ieee80211_sdata_running(sdata))
2294 return;
2295
2296 sdata_lock(sdata);
2297
2298 if (!ifmgd->associated)
2299 goto out;
2300
2301 mutex_lock(&sdata->local->mtx);
2302
2303 if (sdata->local->tmp_channel || sdata->local->scanning) {
2304 mutex_unlock(&sdata->local->mtx);
2305 goto out;
2306 }
2307
2308 if (beacon) {
2309 mlme_dbg_ratelimited(sdata,
2310 "detected beacon loss from AP (missed %d beacons) - probing\n",
2311 beacon_loss_count);
2312
2313 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2314 }
2315
2316 /*
2317 * The driver/our work has already reported this event or the
2318 * connection monitoring has kicked in and we have already sent
2319 * a probe request. Or maybe the AP died and the driver keeps
2320 * reporting until we disassociate...
2321 *
2322 * In either case we have to ignore the current call to this
2323 * function (except for setting the correct probe reason bit)
2324 * because otherwise we would reset the timer every time and
2325 * never check whether we received a probe response!
2326 */
2327 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2328 already = true;
2329
2330 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2331
2332 mutex_unlock(&sdata->local->mtx);
2333
2334 if (already)
2335 goto out;
2336
2337 mutex_lock(&sdata->local->iflist_mtx);
2338 ieee80211_recalc_ps(sdata->local);
2339 mutex_unlock(&sdata->local->iflist_mtx);
2340
2341 ifmgd->probe_send_count = 0;
2342 ieee80211_mgd_probe_ap_send(sdata);
2343 out:
2344 sdata_unlock(sdata);
2345 }
2346
2347 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2348 struct ieee80211_vif *vif)
2349 {
2350 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2352 struct cfg80211_bss *cbss;
2353 struct sk_buff *skb;
2354 const u8 *ssid;
2355 int ssid_len;
2356
2357 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2358 return NULL;
2359
2360 sdata_assert_lock(sdata);
2361
2362 if (ifmgd->associated)
2363 cbss = ifmgd->associated;
2364 else if (ifmgd->auth_data)
2365 cbss = ifmgd->auth_data->bss;
2366 else if (ifmgd->assoc_data)
2367 cbss = ifmgd->assoc_data->bss;
2368 else
2369 return NULL;
2370
2371 rcu_read_lock();
2372 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2373 if (WARN_ON_ONCE(ssid == NULL))
2374 ssid_len = 0;
2375 else
2376 ssid_len = ssid[1];
2377
2378 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2379 (u32) -1, cbss->channel,
2380 ssid + 2, ssid_len,
2381 NULL, 0, true);
2382 rcu_read_unlock();
2383
2384 return skb;
2385 }
2386 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2387
2388 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2389 const u8 *buf, size_t len, bool tx,
2390 u16 reason)
2391 {
2392 struct ieee80211_event event = {
2393 .type = MLME_EVENT,
2394 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2395 .u.mlme.reason = reason,
2396 };
2397
2398 if (tx)
2399 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2400 else
2401 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2402
2403 drv_event_callback(sdata->local, sdata, &event);
2404 }
2405
2406 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2407 {
2408 struct ieee80211_local *local = sdata->local;
2409 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2410 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2411
2412 sdata_lock(sdata);
2413 if (!ifmgd->associated) {
2414 sdata_unlock(sdata);
2415 return;
2416 }
2417
2418 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2419 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2420 true, frame_buf);
2421 mutex_lock(&local->mtx);
2422 sdata->vif.csa_active = false;
2423 ifmgd->csa_waiting_bcn = false;
2424 if (sdata->csa_block_tx) {
2425 ieee80211_wake_vif_queues(local, sdata,
2426 IEEE80211_QUEUE_STOP_REASON_CSA);
2427 sdata->csa_block_tx = false;
2428 }
2429 mutex_unlock(&local->mtx);
2430
2431 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2432 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2433
2434 sdata_unlock(sdata);
2435 }
2436
2437 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2438 {
2439 struct ieee80211_sub_if_data *sdata =
2440 container_of(work, struct ieee80211_sub_if_data,
2441 u.mgd.beacon_connection_loss_work);
2442 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2443
2444 if (ifmgd->associated)
2445 ifmgd->beacon_loss_count++;
2446
2447 if (ifmgd->connection_loss) {
2448 sdata_info(sdata, "Connection to AP %pM lost\n",
2449 ifmgd->bssid);
2450 __ieee80211_disconnect(sdata);
2451 } else {
2452 ieee80211_mgd_probe_ap(sdata, true);
2453 }
2454 }
2455
2456 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2457 {
2458 struct ieee80211_sub_if_data *sdata =
2459 container_of(work, struct ieee80211_sub_if_data,
2460 u.mgd.csa_connection_drop_work);
2461
2462 __ieee80211_disconnect(sdata);
2463 }
2464
2465 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2466 {
2467 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2468 struct ieee80211_hw *hw = &sdata->local->hw;
2469
2470 trace_api_beacon_loss(sdata);
2471
2472 sdata->u.mgd.connection_loss = false;
2473 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2474 }
2475 EXPORT_SYMBOL(ieee80211_beacon_loss);
2476
2477 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2478 {
2479 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2480 struct ieee80211_hw *hw = &sdata->local->hw;
2481
2482 trace_api_connection_loss(sdata);
2483
2484 sdata->u.mgd.connection_loss = true;
2485 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2486 }
2487 EXPORT_SYMBOL(ieee80211_connection_loss);
2488
2489
2490 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2491 bool assoc)
2492 {
2493 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2494
2495 sdata_assert_lock(sdata);
2496
2497 if (!assoc) {
2498 /*
2499 * we are not authenticated yet, the only timer that could be
2500 * running is the timeout for the authentication response which
2501 * which is not relevant anymore.
2502 */
2503 del_timer_sync(&sdata->u.mgd.timer);
2504 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2505
2506 eth_zero_addr(sdata->u.mgd.bssid);
2507 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2508 sdata->u.mgd.flags = 0;
2509 mutex_lock(&sdata->local->mtx);
2510 ieee80211_vif_release_channel(sdata);
2511 mutex_unlock(&sdata->local->mtx);
2512 }
2513
2514 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2515 kfree(auth_data);
2516 sdata->u.mgd.auth_data = NULL;
2517 }
2518
2519 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2520 bool assoc)
2521 {
2522 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2523
2524 sdata_assert_lock(sdata);
2525
2526 if (!assoc) {
2527 /*
2528 * we are not associated yet, the only timer that could be
2529 * running is the timeout for the association response which
2530 * which is not relevant anymore.
2531 */
2532 del_timer_sync(&sdata->u.mgd.timer);
2533 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2534
2535 eth_zero_addr(sdata->u.mgd.bssid);
2536 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2537 sdata->u.mgd.flags = 0;
2538 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2539 mutex_lock(&sdata->local->mtx);
2540 ieee80211_vif_release_channel(sdata);
2541 mutex_unlock(&sdata->local->mtx);
2542 }
2543
2544 kfree(assoc_data);
2545 sdata->u.mgd.assoc_data = NULL;
2546 }
2547
2548 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2549 struct ieee80211_mgmt *mgmt, size_t len)
2550 {
2551 struct ieee80211_local *local = sdata->local;
2552 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2553 u8 *pos;
2554 struct ieee802_11_elems elems;
2555 u32 tx_flags = 0;
2556
2557 pos = mgmt->u.auth.variable;
2558 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2559 if (!elems.challenge)
2560 return;
2561 auth_data->expected_transaction = 4;
2562 drv_mgd_prepare_tx(sdata->local, sdata);
2563 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2564 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2565 IEEE80211_TX_INTFL_MLME_CONN_TX;
2566 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2567 elems.challenge - 2, elems.challenge_len + 2,
2568 auth_data->bss->bssid, auth_data->bss->bssid,
2569 auth_data->key, auth_data->key_len,
2570 auth_data->key_idx, tx_flags);
2571 }
2572
2573 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2574 struct ieee80211_mgmt *mgmt, size_t len)
2575 {
2576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2577 u8 bssid[ETH_ALEN];
2578 u16 auth_alg, auth_transaction, status_code;
2579 struct sta_info *sta;
2580 struct ieee80211_event event = {
2581 .type = MLME_EVENT,
2582 .u.mlme.data = AUTH_EVENT,
2583 };
2584
2585 sdata_assert_lock(sdata);
2586
2587 if (len < 24 + 6)
2588 return;
2589
2590 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2591 return;
2592
2593 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2594
2595 if (!ether_addr_equal(bssid, mgmt->bssid))
2596 return;
2597
2598 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2599 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2600 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2601
2602 if (auth_alg != ifmgd->auth_data->algorithm ||
2603 auth_transaction != ifmgd->auth_data->expected_transaction) {
2604 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2605 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2606 auth_transaction,
2607 ifmgd->auth_data->expected_transaction);
2608 return;
2609 }
2610
2611 if (status_code != WLAN_STATUS_SUCCESS) {
2612 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2613 mgmt->sa, status_code);
2614 ieee80211_destroy_auth_data(sdata, false);
2615 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2616 event.u.mlme.status = MLME_DENIED;
2617 event.u.mlme.reason = status_code;
2618 drv_event_callback(sdata->local, sdata, &event);
2619 return;
2620 }
2621
2622 switch (ifmgd->auth_data->algorithm) {
2623 case WLAN_AUTH_OPEN:
2624 case WLAN_AUTH_LEAP:
2625 case WLAN_AUTH_FT:
2626 case WLAN_AUTH_SAE:
2627 break;
2628 case WLAN_AUTH_SHARED_KEY:
2629 if (ifmgd->auth_data->expected_transaction != 4) {
2630 ieee80211_auth_challenge(sdata, mgmt, len);
2631 /* need another frame */
2632 return;
2633 }
2634 break;
2635 default:
2636 WARN_ONCE(1, "invalid auth alg %d",
2637 ifmgd->auth_data->algorithm);
2638 return;
2639 }
2640
2641 event.u.mlme.status = MLME_SUCCESS;
2642 drv_event_callback(sdata->local, sdata, &event);
2643 sdata_info(sdata, "authenticated\n");
2644 ifmgd->auth_data->done = true;
2645 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2646 ifmgd->auth_data->timeout_started = true;
2647 run_again(sdata, ifmgd->auth_data->timeout);
2648
2649 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2650 ifmgd->auth_data->expected_transaction != 2) {
2651 /*
2652 * Report auth frame to user space for processing since another
2653 * round of Authentication frames is still needed.
2654 */
2655 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2656 return;
2657 }
2658
2659 /* move station state to auth */
2660 mutex_lock(&sdata->local->sta_mtx);
2661 sta = sta_info_get(sdata, bssid);
2662 if (!sta) {
2663 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2664 goto out_err;
2665 }
2666 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2667 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2668 goto out_err;
2669 }
2670 mutex_unlock(&sdata->local->sta_mtx);
2671
2672 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2673 return;
2674 out_err:
2675 mutex_unlock(&sdata->local->sta_mtx);
2676 /* ignore frame -- wait for timeout */
2677 }
2678
2679 #define case_WLAN(type) \
2680 case WLAN_REASON_##type: return #type
2681
2682 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2683 {
2684 switch (reason_code) {
2685 case_WLAN(UNSPECIFIED);
2686 case_WLAN(PREV_AUTH_NOT_VALID);
2687 case_WLAN(DEAUTH_LEAVING);
2688 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2689 case_WLAN(DISASSOC_AP_BUSY);
2690 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2691 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2692 case_WLAN(DISASSOC_STA_HAS_LEFT);
2693 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2694 case_WLAN(DISASSOC_BAD_POWER);
2695 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2696 case_WLAN(INVALID_IE);
2697 case_WLAN(MIC_FAILURE);
2698 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2699 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2700 case_WLAN(IE_DIFFERENT);
2701 case_WLAN(INVALID_GROUP_CIPHER);
2702 case_WLAN(INVALID_PAIRWISE_CIPHER);
2703 case_WLAN(INVALID_AKMP);
2704 case_WLAN(UNSUPP_RSN_VERSION);
2705 case_WLAN(INVALID_RSN_IE_CAP);
2706 case_WLAN(IEEE8021X_FAILED);
2707 case_WLAN(CIPHER_SUITE_REJECTED);
2708 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2709 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2710 case_WLAN(DISASSOC_LOW_ACK);
2711 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2712 case_WLAN(QSTA_LEAVE_QBSS);
2713 case_WLAN(QSTA_NOT_USE);
2714 case_WLAN(QSTA_REQUIRE_SETUP);
2715 case_WLAN(QSTA_TIMEOUT);
2716 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2717 case_WLAN(MESH_PEER_CANCELED);
2718 case_WLAN(MESH_MAX_PEERS);
2719 case_WLAN(MESH_CONFIG);
2720 case_WLAN(MESH_CLOSE);
2721 case_WLAN(MESH_MAX_RETRIES);
2722 case_WLAN(MESH_CONFIRM_TIMEOUT);
2723 case_WLAN(MESH_INVALID_GTK);
2724 case_WLAN(MESH_INCONSISTENT_PARAM);
2725 case_WLAN(MESH_INVALID_SECURITY);
2726 case_WLAN(MESH_PATH_ERROR);
2727 case_WLAN(MESH_PATH_NOFORWARD);
2728 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2729 case_WLAN(MAC_EXISTS_IN_MBSS);
2730 case_WLAN(MESH_CHAN_REGULATORY);
2731 case_WLAN(MESH_CHAN);
2732 default: return "<unknown>";
2733 }
2734 }
2735
2736 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2737 struct ieee80211_mgmt *mgmt, size_t len)
2738 {
2739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2740 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2741
2742 sdata_assert_lock(sdata);
2743
2744 if (len < 24 + 2)
2745 return;
2746
2747 if (ifmgd->associated &&
2748 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2749 const u8 *bssid = ifmgd->associated->bssid;
2750
2751 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2752 bssid, reason_code,
2753 ieee80211_get_reason_code_string(reason_code));
2754
2755 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2756
2757 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2758 reason_code);
2759 return;
2760 }
2761
2762 if (ifmgd->assoc_data &&
2763 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2764 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2765
2766 sdata_info(sdata,
2767 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2768 bssid, reason_code,
2769 ieee80211_get_reason_code_string(reason_code));
2770
2771 ieee80211_destroy_assoc_data(sdata, false);
2772
2773 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2774 return;
2775 }
2776 }
2777
2778
2779 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2780 struct ieee80211_mgmt *mgmt, size_t len)
2781 {
2782 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2783 u16 reason_code;
2784
2785 sdata_assert_lock(sdata);
2786
2787 if (len < 24 + 2)
2788 return;
2789
2790 if (!ifmgd->associated ||
2791 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2792 return;
2793
2794 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2795
2796 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2797 mgmt->sa, reason_code);
2798
2799 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2800
2801 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2802 }
2803
2804 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2805 u8 *supp_rates, unsigned int supp_rates_len,
2806 u32 *rates, u32 *basic_rates,
2807 bool *have_higher_than_11mbit,
2808 int *min_rate, int *min_rate_index,
2809 int shift, u32 rate_flags)
2810 {
2811 int i, j;
2812
2813 for (i = 0; i < supp_rates_len; i++) {
2814 int rate = supp_rates[i] & 0x7f;
2815 bool is_basic = !!(supp_rates[i] & 0x80);
2816
2817 if ((rate * 5 * (1 << shift)) > 110)
2818 *have_higher_than_11mbit = true;
2819
2820 /*
2821 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2822 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2823 *
2824 * Note: Even through the membership selector and the basic
2825 * rate flag share the same bit, they are not exactly
2826 * the same.
2827 */
2828 if (!!(supp_rates[i] & 0x80) &&
2829 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2830 continue;
2831
2832 for (j = 0; j < sband->n_bitrates; j++) {
2833 struct ieee80211_rate *br;
2834 int brate;
2835
2836 br = &sband->bitrates[j];
2837 if ((rate_flags & br->flags) != rate_flags)
2838 continue;
2839
2840 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2841 if (brate == rate) {
2842 *rates |= BIT(j);
2843 if (is_basic)
2844 *basic_rates |= BIT(j);
2845 if ((rate * 5) < *min_rate) {
2846 *min_rate = rate * 5;
2847 *min_rate_index = j;
2848 }
2849 break;
2850 }
2851 }
2852 }
2853 }
2854
2855 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2856 struct cfg80211_bss *cbss,
2857 struct ieee80211_mgmt *mgmt, size_t len)
2858 {
2859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2860 struct ieee80211_local *local = sdata->local;
2861 struct ieee80211_supported_band *sband;
2862 struct sta_info *sta;
2863 u8 *pos;
2864 u16 capab_info, aid;
2865 struct ieee802_11_elems elems;
2866 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2867 const struct cfg80211_bss_ies *bss_ies = NULL;
2868 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2869 u32 changed = 0;
2870 int err;
2871 bool ret;
2872
2873 /* AssocResp and ReassocResp have identical structure */
2874
2875 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2876 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2877
2878 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2879 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2880 aid);
2881 aid &= ~(BIT(15) | BIT(14));
2882
2883 ifmgd->broken_ap = false;
2884
2885 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2886 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2887 aid);
2888 aid = 0;
2889 ifmgd->broken_ap = true;
2890 }
2891
2892 pos = mgmt->u.assoc_resp.variable;
2893 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2894
2895 if (!elems.supp_rates) {
2896 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2897 return false;
2898 }
2899
2900 ifmgd->aid = aid;
2901 ifmgd->tdls_chan_switch_prohibited =
2902 elems.ext_capab && elems.ext_capab_len >= 5 &&
2903 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2904
2905 /*
2906 * Some APs are erroneously not including some information in their
2907 * (re)association response frames. Try to recover by using the data
2908 * from the beacon or probe response. This seems to afflict mobile
2909 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2910 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2911 */
2912 if ((assoc_data->wmm && !elems.wmm_param) ||
2913 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2914 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2915 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2916 (!elems.vht_cap_elem || !elems.vht_operation))) {
2917 const struct cfg80211_bss_ies *ies;
2918 struct ieee802_11_elems bss_elems;
2919
2920 rcu_read_lock();
2921 ies = rcu_dereference(cbss->ies);
2922 if (ies)
2923 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2924 GFP_ATOMIC);
2925 rcu_read_unlock();
2926 if (!bss_ies)
2927 return false;
2928
2929 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2930 false, &bss_elems);
2931 if (assoc_data->wmm &&
2932 !elems.wmm_param && bss_elems.wmm_param) {
2933 elems.wmm_param = bss_elems.wmm_param;
2934 sdata_info(sdata,
2935 "AP bug: WMM param missing from AssocResp\n");
2936 }
2937
2938 /*
2939 * Also check if we requested HT/VHT, otherwise the AP doesn't
2940 * have to include the IEs in the (re)association response.
2941 */
2942 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2943 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2944 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2945 sdata_info(sdata,
2946 "AP bug: HT capability missing from AssocResp\n");
2947 }
2948 if (!elems.ht_operation && bss_elems.ht_operation &&
2949 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2950 elems.ht_operation = bss_elems.ht_operation;
2951 sdata_info(sdata,
2952 "AP bug: HT operation missing from AssocResp\n");
2953 }
2954 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2955 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2956 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2957 sdata_info(sdata,
2958 "AP bug: VHT capa missing from AssocResp\n");
2959 }
2960 if (!elems.vht_operation && bss_elems.vht_operation &&
2961 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2962 elems.vht_operation = bss_elems.vht_operation;
2963 sdata_info(sdata,
2964 "AP bug: VHT operation missing from AssocResp\n");
2965 }
2966 }
2967
2968 /*
2969 * We previously checked these in the beacon/probe response, so
2970 * they should be present here. This is just a safety net.
2971 */
2972 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2973 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2974 sdata_info(sdata,
2975 "HT AP is missing WMM params or HT capability/operation\n");
2976 ret = false;
2977 goto out;
2978 }
2979
2980 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2981 (!elems.vht_cap_elem || !elems.vht_operation)) {
2982 sdata_info(sdata,
2983 "VHT AP is missing VHT capability/operation\n");
2984 ret = false;
2985 goto out;
2986 }
2987
2988 mutex_lock(&sdata->local->sta_mtx);
2989 /*
2990 * station info was already allocated and inserted before
2991 * the association and should be available to us
2992 */
2993 sta = sta_info_get(sdata, cbss->bssid);
2994 if (WARN_ON(!sta)) {
2995 mutex_unlock(&sdata->local->sta_mtx);
2996 ret = false;
2997 goto out;
2998 }
2999
3000 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3001
3002 /* Set up internal HT/VHT capabilities */
3003 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3004 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3005 elems.ht_cap_elem, sta);
3006
3007 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3008 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3009 elems.vht_cap_elem, sta);
3010
3011 /*
3012 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3013 * in their association response, so ignore that data for our own
3014 * configuration. If it changed since the last beacon, we'll get the
3015 * next beacon and update then.
3016 */
3017
3018 /*
3019 * If an operating mode notification IE is present, override the
3020 * NSS calculation (that would be done in rate_control_rate_init())
3021 * and use the # of streams from that element.
3022 */
3023 if (elems.opmode_notif &&
3024 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3025 u8 nss;
3026
3027 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3028 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3029 nss += 1;
3030 sta->sta.rx_nss = nss;
3031 }
3032
3033 rate_control_rate_init(sta);
3034
3035 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3036 set_sta_flag(sta, WLAN_STA_MFP);
3037 sta->sta.mfp = true;
3038 } else {
3039 sta->sta.mfp = false;
3040 }
3041
3042 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3043
3044 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3045 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3046 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3047 if (err) {
3048 sdata_info(sdata,
3049 "failed to move station %pM to desired state\n",
3050 sta->sta.addr);
3051 WARN_ON(__sta_info_destroy(sta));
3052 mutex_unlock(&sdata->local->sta_mtx);
3053 ret = false;
3054 goto out;
3055 }
3056
3057 mutex_unlock(&sdata->local->sta_mtx);
3058
3059 /*
3060 * Always handle WMM once after association regardless
3061 * of the first value the AP uses. Setting -1 here has
3062 * that effect because the AP values is an unsigned
3063 * 4-bit value.
3064 */
3065 ifmgd->wmm_last_param_set = -1;
3066
3067 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3068 ieee80211_set_wmm_default(sdata, false, false);
3069 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3070 elems.wmm_param_len)) {
3071 /* still enable QoS since we might have HT/VHT */
3072 ieee80211_set_wmm_default(sdata, false, true);
3073 /* set the disable-WMM flag in this case to disable
3074 * tracking WMM parameter changes in the beacon if
3075 * the parameters weren't actually valid. Doing so
3076 * avoids changing parameters very strangely when
3077 * the AP is going back and forth between valid and
3078 * invalid parameters.
3079 */
3080 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3081 }
3082 changed |= BSS_CHANGED_QOS;
3083
3084 /* set AID and assoc capability,
3085 * ieee80211_set_associated() will tell the driver */
3086 bss_conf->aid = aid;
3087 bss_conf->assoc_capability = capab_info;
3088 ieee80211_set_associated(sdata, cbss, changed);
3089
3090 /*
3091 * If we're using 4-addr mode, let the AP know that we're
3092 * doing so, so that it can create the STA VLAN on its side
3093 */
3094 if (ifmgd->use_4addr)
3095 ieee80211_send_4addr_nullfunc(local, sdata);
3096
3097 /*
3098 * Start timer to probe the connection to the AP now.
3099 * Also start the timer that will detect beacon loss.
3100 */
3101 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3102 ieee80211_sta_reset_beacon_monitor(sdata);
3103
3104 ret = true;
3105 out:
3106 kfree(bss_ies);
3107 return ret;
3108 }
3109
3110 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3111 struct ieee80211_mgmt *mgmt,
3112 size_t len)
3113 {
3114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3115 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3116 u16 capab_info, status_code, aid;
3117 struct ieee802_11_elems elems;
3118 int ac, uapsd_queues = -1;
3119 u8 *pos;
3120 bool reassoc;
3121 struct cfg80211_bss *bss;
3122 struct ieee80211_event event = {
3123 .type = MLME_EVENT,
3124 .u.mlme.data = ASSOC_EVENT,
3125 };
3126
3127 sdata_assert_lock(sdata);
3128
3129 if (!assoc_data)
3130 return;
3131 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3132 return;
3133
3134 /*
3135 * AssocResp and ReassocResp have identical structure, so process both
3136 * of them in this function.
3137 */
3138
3139 if (len < 24 + 6)
3140 return;
3141
3142 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3143 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3144 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3145 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3146
3147 sdata_info(sdata,
3148 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3149 reassoc ? "Rea" : "A", mgmt->sa,
3150 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3151
3152 pos = mgmt->u.assoc_resp.variable;
3153 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3154
3155 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3156 elems.timeout_int &&
3157 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3158 u32 tu, ms;
3159 tu = le32_to_cpu(elems.timeout_int->value);
3160 ms = tu * 1024 / 1000;
3161 sdata_info(sdata,
3162 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3163 mgmt->sa, tu, ms);
3164 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3165 assoc_data->timeout_started = true;
3166 if (ms > IEEE80211_ASSOC_TIMEOUT)
3167 run_again(sdata, assoc_data->timeout);
3168 return;
3169 }
3170
3171 bss = assoc_data->bss;
3172
3173 if (status_code != WLAN_STATUS_SUCCESS) {
3174 sdata_info(sdata, "%pM denied association (code=%d)\n",
3175 mgmt->sa, status_code);
3176 ieee80211_destroy_assoc_data(sdata, false);
3177 event.u.mlme.status = MLME_DENIED;
3178 event.u.mlme.reason = status_code;
3179 drv_event_callback(sdata->local, sdata, &event);
3180 } else {
3181 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3182 /* oops -- internal error -- send timeout for now */
3183 ieee80211_destroy_assoc_data(sdata, false);
3184 cfg80211_assoc_timeout(sdata->dev, bss);
3185 return;
3186 }
3187 event.u.mlme.status = MLME_SUCCESS;
3188 drv_event_callback(sdata->local, sdata, &event);
3189 sdata_info(sdata, "associated\n");
3190
3191 /*
3192 * destroy assoc_data afterwards, as otherwise an idle
3193 * recalc after assoc_data is NULL but before associated
3194 * is set can cause the interface to go idle
3195 */
3196 ieee80211_destroy_assoc_data(sdata, true);
3197
3198 /* get uapsd queues configuration */
3199 uapsd_queues = 0;
3200 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3201 if (sdata->tx_conf[ac].uapsd)
3202 uapsd_queues |= BIT(ac);
3203 }
3204
3205 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3206 }
3207
3208 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3209 struct ieee80211_mgmt *mgmt, size_t len,
3210 struct ieee80211_rx_status *rx_status,
3211 struct ieee802_11_elems *elems)
3212 {
3213 struct ieee80211_local *local = sdata->local;
3214 struct ieee80211_bss *bss;
3215 struct ieee80211_channel *channel;
3216
3217 sdata_assert_lock(sdata);
3218
3219 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3220 if (!channel)
3221 return;
3222
3223 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3224 channel);
3225 if (bss) {
3226 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3227 ieee80211_rx_bss_put(local, bss);
3228 }
3229 }
3230
3231
3232 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3233 struct sk_buff *skb)
3234 {
3235 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3236 struct ieee80211_if_managed *ifmgd;
3237 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3238 size_t baselen, len = skb->len;
3239 struct ieee802_11_elems elems;
3240
3241 ifmgd = &sdata->u.mgd;
3242
3243 sdata_assert_lock(sdata);
3244
3245 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3246 return; /* ignore ProbeResp to foreign address */
3247
3248 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3249 if (baselen > len)
3250 return;
3251
3252 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3253 false, &elems);
3254
3255 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3256
3257 if (ifmgd->associated &&
3258 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3259 ieee80211_reset_ap_probe(sdata);
3260 }
3261
3262 /*
3263 * This is the canonical list of information elements we care about,
3264 * the filter code also gives us all changes to the Microsoft OUI
3265 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3266 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3267 * changes to requested client power.
3268 *
3269 * We implement beacon filtering in software since that means we can
3270 * avoid processing the frame here and in cfg80211, and userspace
3271 * will not be able to tell whether the hardware supports it or not.
3272 *
3273 * XXX: This list needs to be dynamic -- userspace needs to be able to
3274 * add items it requires. It also needs to be able to tell us to
3275 * look out for other vendor IEs.
3276 */
3277 static const u64 care_about_ies =
3278 (1ULL << WLAN_EID_COUNTRY) |
3279 (1ULL << WLAN_EID_ERP_INFO) |
3280 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3281 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3282 (1ULL << WLAN_EID_HT_CAPABILITY) |
3283 (1ULL << WLAN_EID_HT_OPERATION) |
3284 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3285
3286 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3287 struct ieee80211_mgmt *mgmt, size_t len,
3288 struct ieee80211_rx_status *rx_status)
3289 {
3290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3291 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3292 size_t baselen;
3293 struct ieee802_11_elems elems;
3294 struct ieee80211_local *local = sdata->local;
3295 struct ieee80211_chanctx_conf *chanctx_conf;
3296 struct ieee80211_channel *chan;
3297 struct sta_info *sta;
3298 u32 changed = 0;
3299 bool erp_valid;
3300 u8 erp_value = 0;
3301 u32 ncrc;
3302 u8 *bssid;
3303 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3304
3305 sdata_assert_lock(sdata);
3306
3307 /* Process beacon from the current BSS */
3308 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3309 if (baselen > len)
3310 return;
3311
3312 rcu_read_lock();
3313 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3314 if (!chanctx_conf) {
3315 rcu_read_unlock();
3316 return;
3317 }
3318
3319 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3320 rcu_read_unlock();
3321 return;
3322 }
3323 chan = chanctx_conf->def.chan;
3324 rcu_read_unlock();
3325
3326 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3327 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3328 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3329 len - baselen, false, &elems);
3330
3331 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3332 if (elems.tim && !elems.parse_error) {
3333 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3334 ifmgd->dtim_period = tim_ie->dtim_period;
3335 }
3336 ifmgd->have_beacon = true;
3337 ifmgd->assoc_data->need_beacon = false;
3338 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3339 sdata->vif.bss_conf.sync_tsf =
3340 le64_to_cpu(mgmt->u.beacon.timestamp);
3341 sdata->vif.bss_conf.sync_device_ts =
3342 rx_status->device_timestamp;
3343 if (elems.tim)
3344 sdata->vif.bss_conf.sync_dtim_count =
3345 elems.tim->dtim_count;
3346 else
3347 sdata->vif.bss_conf.sync_dtim_count = 0;
3348 }
3349 /* continue assoc process */
3350 ifmgd->assoc_data->timeout = jiffies;
3351 ifmgd->assoc_data->timeout_started = true;
3352 run_again(sdata, ifmgd->assoc_data->timeout);
3353 return;
3354 }
3355
3356 if (!ifmgd->associated ||
3357 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3358 return;
3359 bssid = ifmgd->associated->bssid;
3360
3361 /* Track average RSSI from the Beacon frames of the current AP */
3362 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3363 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3364 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3365 ifmgd->last_cqm_event_signal = 0;
3366 ifmgd->count_beacon_signal = 1;
3367 ifmgd->last_ave_beacon_signal = 0;
3368 } else {
3369 ifmgd->count_beacon_signal++;
3370 }
3371
3372 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3373
3374 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3375 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3376 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3377 int last_sig = ifmgd->last_ave_beacon_signal;
3378 struct ieee80211_event event = {
3379 .type = RSSI_EVENT,
3380 };
3381
3382 /*
3383 * if signal crosses either of the boundaries, invoke callback
3384 * with appropriate parameters
3385 */
3386 if (sig > ifmgd->rssi_max_thold &&
3387 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3388 ifmgd->last_ave_beacon_signal = sig;
3389 event.u.rssi.data = RSSI_EVENT_HIGH;
3390 drv_event_callback(local, sdata, &event);
3391 } else if (sig < ifmgd->rssi_min_thold &&
3392 (last_sig >= ifmgd->rssi_max_thold ||
3393 last_sig == 0)) {
3394 ifmgd->last_ave_beacon_signal = sig;
3395 event.u.rssi.data = RSSI_EVENT_LOW;
3396 drv_event_callback(local, sdata, &event);
3397 }
3398 }
3399
3400 if (bss_conf->cqm_rssi_thold &&
3401 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3402 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3403 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3404 int last_event = ifmgd->last_cqm_event_signal;
3405 int thold = bss_conf->cqm_rssi_thold;
3406 int hyst = bss_conf->cqm_rssi_hyst;
3407
3408 if (sig < thold &&
3409 (last_event == 0 || sig < last_event - hyst)) {
3410 ifmgd->last_cqm_event_signal = sig;
3411 ieee80211_cqm_rssi_notify(
3412 &sdata->vif,
3413 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3414 GFP_KERNEL);
3415 } else if (sig > thold &&
3416 (last_event == 0 || sig > last_event + hyst)) {
3417 ifmgd->last_cqm_event_signal = sig;
3418 ieee80211_cqm_rssi_notify(
3419 &sdata->vif,
3420 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3421 GFP_KERNEL);
3422 }
3423 }
3424
3425 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3426 mlme_dbg_ratelimited(sdata,
3427 "cancelling AP probe due to a received beacon\n");
3428 ieee80211_reset_ap_probe(sdata);
3429 }
3430
3431 /*
3432 * Push the beacon loss detection into the future since
3433 * we are processing a beacon from the AP just now.
3434 */
3435 ieee80211_sta_reset_beacon_monitor(sdata);
3436
3437 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3438 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3439 len - baselen, false, &elems,
3440 care_about_ies, ncrc);
3441
3442 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3443 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3444 if (local->hw.conf.dynamic_ps_timeout > 0) {
3445 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3446 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3447 ieee80211_hw_config(local,
3448 IEEE80211_CONF_CHANGE_PS);
3449 }
3450 ieee80211_send_nullfunc(local, sdata, false);
3451 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3452 local->pspolling = true;
3453
3454 /*
3455 * Here is assumed that the driver will be
3456 * able to send ps-poll frame and receive a
3457 * response even though power save mode is
3458 * enabled, but some drivers might require
3459 * to disable power save here. This needs
3460 * to be investigated.
3461 */
3462 ieee80211_send_pspoll(local, sdata);
3463 }
3464 }
3465
3466 if (sdata->vif.p2p) {
3467 struct ieee80211_p2p_noa_attr noa = {};
3468 int ret;
3469
3470 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3471 len - baselen,
3472 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3473 (u8 *) &noa, sizeof(noa));
3474 if (ret >= 2) {
3475 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3476 /* valid noa_attr and index changed */
3477 sdata->u.mgd.p2p_noa_index = noa.index;
3478 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3479 changed |= BSS_CHANGED_P2P_PS;
3480 /*
3481 * make sure we update all information, the CRC
3482 * mechanism doesn't look at P2P attributes.
3483 */
3484 ifmgd->beacon_crc_valid = false;
3485 }
3486 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3487 /* noa_attr not found and we had valid noa_attr before */
3488 sdata->u.mgd.p2p_noa_index = -1;
3489 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3490 changed |= BSS_CHANGED_P2P_PS;
3491 ifmgd->beacon_crc_valid = false;
3492 }
3493 }
3494
3495 if (ifmgd->csa_waiting_bcn)
3496 ieee80211_chswitch_post_beacon(sdata);
3497
3498 /*
3499 * Update beacon timing and dtim count on every beacon appearance. This
3500 * will allow the driver to use the most updated values. Do it before
3501 * comparing this one with last received beacon.
3502 * IMPORTANT: These parameters would possibly be out of sync by the time
3503 * the driver will use them. The synchronized view is currently
3504 * guaranteed only in certain callbacks.
3505 */
3506 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3507 sdata->vif.bss_conf.sync_tsf =
3508 le64_to_cpu(mgmt->u.beacon.timestamp);
3509 sdata->vif.bss_conf.sync_device_ts =
3510 rx_status->device_timestamp;
3511 if (elems.tim)
3512 sdata->vif.bss_conf.sync_dtim_count =
3513 elems.tim->dtim_count;
3514 else
3515 sdata->vif.bss_conf.sync_dtim_count = 0;
3516 }
3517
3518 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3519 return;
3520 ifmgd->beacon_crc = ncrc;
3521 ifmgd->beacon_crc_valid = true;
3522
3523 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3524
3525 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3526 rx_status->device_timestamp,
3527 &elems, true);
3528
3529 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3530 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3531 elems.wmm_param_len))
3532 changed |= BSS_CHANGED_QOS;
3533
3534 /*
3535 * If we haven't had a beacon before, tell the driver about the
3536 * DTIM period (and beacon timing if desired) now.
3537 */
3538 if (!ifmgd->have_beacon) {
3539 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3540 if (elems.tim)
3541 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3542 else
3543 bss_conf->dtim_period = 1;
3544
3545 changed |= BSS_CHANGED_BEACON_INFO;
3546 ifmgd->have_beacon = true;
3547
3548 mutex_lock(&local->iflist_mtx);
3549 ieee80211_recalc_ps(local);
3550 mutex_unlock(&local->iflist_mtx);
3551
3552 ieee80211_recalc_ps_vif(sdata);
3553 }
3554
3555 if (elems.erp_info) {
3556 erp_valid = true;
3557 erp_value = elems.erp_info[0];
3558 } else {
3559 erp_valid = false;
3560 }
3561 changed |= ieee80211_handle_bss_capability(sdata,
3562 le16_to_cpu(mgmt->u.beacon.capab_info),
3563 erp_valid, erp_value);
3564
3565 mutex_lock(&local->sta_mtx);
3566 sta = sta_info_get(sdata, bssid);
3567
3568 if (ieee80211_config_bw(sdata, sta,
3569 elems.ht_cap_elem, elems.ht_operation,
3570 elems.vht_operation, bssid, &changed)) {
3571 mutex_unlock(&local->sta_mtx);
3572 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3573 WLAN_REASON_DEAUTH_LEAVING,
3574 true, deauth_buf);
3575 ieee80211_report_disconnect(sdata, deauth_buf,
3576 sizeof(deauth_buf), true,
3577 WLAN_REASON_DEAUTH_LEAVING);
3578 return;
3579 }
3580
3581 if (sta && elems.opmode_notif)
3582 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3583 rx_status->band);
3584 mutex_unlock(&local->sta_mtx);
3585
3586 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3587 elems.country_elem,
3588 elems.country_elem_len,
3589 elems.pwr_constr_elem,
3590 elems.cisco_dtpc_elem);
3591
3592 ieee80211_bss_info_change_notify(sdata, changed);
3593 }
3594
3595 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3596 struct sk_buff *skb)
3597 {
3598 struct ieee80211_rx_status *rx_status;
3599 struct ieee80211_mgmt *mgmt;
3600 u16 fc;
3601 struct ieee802_11_elems elems;
3602 int ies_len;
3603
3604 rx_status = (struct ieee80211_rx_status *) skb->cb;
3605 mgmt = (struct ieee80211_mgmt *) skb->data;
3606 fc = le16_to_cpu(mgmt->frame_control);
3607
3608 sdata_lock(sdata);
3609
3610 switch (fc & IEEE80211_FCTL_STYPE) {
3611 case IEEE80211_STYPE_BEACON:
3612 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3613 break;
3614 case IEEE80211_STYPE_PROBE_RESP:
3615 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3616 break;
3617 case IEEE80211_STYPE_AUTH:
3618 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3619 break;
3620 case IEEE80211_STYPE_DEAUTH:
3621 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3622 break;
3623 case IEEE80211_STYPE_DISASSOC:
3624 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3625 break;
3626 case IEEE80211_STYPE_ASSOC_RESP:
3627 case IEEE80211_STYPE_REASSOC_RESP:
3628 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3629 break;
3630 case IEEE80211_STYPE_ACTION:
3631 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3632 ies_len = skb->len -
3633 offsetof(struct ieee80211_mgmt,
3634 u.action.u.chan_switch.variable);
3635
3636 if (ies_len < 0)
3637 break;
3638
3639 ieee802_11_parse_elems(
3640 mgmt->u.action.u.chan_switch.variable,
3641 ies_len, true, &elems);
3642
3643 if (elems.parse_error)
3644 break;
3645
3646 ieee80211_sta_process_chanswitch(sdata,
3647 rx_status->mactime,
3648 rx_status->device_timestamp,
3649 &elems, false);
3650 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3651 ies_len = skb->len -
3652 offsetof(struct ieee80211_mgmt,
3653 u.action.u.ext_chan_switch.variable);
3654
3655 if (ies_len < 0)
3656 break;
3657
3658 ieee802_11_parse_elems(
3659 mgmt->u.action.u.ext_chan_switch.variable,
3660 ies_len, true, &elems);
3661
3662 if (elems.parse_error)
3663 break;
3664
3665 /* for the handling code pretend this was also an IE */
3666 elems.ext_chansw_ie =
3667 &mgmt->u.action.u.ext_chan_switch.data;
3668
3669 ieee80211_sta_process_chanswitch(sdata,
3670 rx_status->mactime,
3671 rx_status->device_timestamp,
3672 &elems, false);
3673 }
3674 break;
3675 }
3676 sdata_unlock(sdata);
3677 }
3678
3679 static void ieee80211_sta_timer(unsigned long data)
3680 {
3681 struct ieee80211_sub_if_data *sdata =
3682 (struct ieee80211_sub_if_data *) data;
3683
3684 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3685 }
3686
3687 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3688 u8 *bssid, u8 reason, bool tx)
3689 {
3690 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3691
3692 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3693 tx, frame_buf);
3694
3695 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3696 reason);
3697 }
3698
3699 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3700 {
3701 struct ieee80211_local *local = sdata->local;
3702 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3703 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3704 u32 tx_flags = 0;
3705 u16 trans = 1;
3706 u16 status = 0;
3707
3708 sdata_assert_lock(sdata);
3709
3710 if (WARN_ON_ONCE(!auth_data))
3711 return -EINVAL;
3712
3713 auth_data->tries++;
3714
3715 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3716 sdata_info(sdata, "authentication with %pM timed out\n",
3717 auth_data->bss->bssid);
3718
3719 /*
3720 * Most likely AP is not in the range so remove the
3721 * bss struct for that AP.
3722 */
3723 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3724
3725 return -ETIMEDOUT;
3726 }
3727
3728 drv_mgd_prepare_tx(local, sdata);
3729
3730 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3731 auth_data->bss->bssid, auth_data->tries,
3732 IEEE80211_AUTH_MAX_TRIES);
3733
3734 auth_data->expected_transaction = 2;
3735
3736 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3737 trans = auth_data->sae_trans;
3738 status = auth_data->sae_status;
3739 auth_data->expected_transaction = trans;
3740 }
3741
3742 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3743 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3744 IEEE80211_TX_INTFL_MLME_CONN_TX;
3745
3746 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3747 auth_data->data, auth_data->data_len,
3748 auth_data->bss->bssid,
3749 auth_data->bss->bssid, NULL, 0, 0,
3750 tx_flags);
3751
3752 if (tx_flags == 0) {
3753 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3754 auth_data->timeout_started = true;
3755 run_again(sdata, auth_data->timeout);
3756 } else {
3757 auth_data->timeout =
3758 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3759 auth_data->timeout_started = true;
3760 run_again(sdata, auth_data->timeout);
3761 }
3762
3763 return 0;
3764 }
3765
3766 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3767 {
3768 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3769 struct ieee80211_local *local = sdata->local;
3770
3771 sdata_assert_lock(sdata);
3772
3773 assoc_data->tries++;
3774 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3775 sdata_info(sdata, "association with %pM timed out\n",
3776 assoc_data->bss->bssid);
3777
3778 /*
3779 * Most likely AP is not in the range so remove the
3780 * bss struct for that AP.
3781 */
3782 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3783
3784 return -ETIMEDOUT;
3785 }
3786
3787 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3788 assoc_data->bss->bssid, assoc_data->tries,
3789 IEEE80211_ASSOC_MAX_TRIES);
3790 ieee80211_send_assoc(sdata);
3791
3792 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3793 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3794 assoc_data->timeout_started = true;
3795 run_again(sdata, assoc_data->timeout);
3796 } else {
3797 assoc_data->timeout =
3798 round_jiffies_up(jiffies +
3799 IEEE80211_ASSOC_TIMEOUT_LONG);
3800 assoc_data->timeout_started = true;
3801 run_again(sdata, assoc_data->timeout);
3802 }
3803
3804 return 0;
3805 }
3806
3807 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3808 __le16 fc, bool acked)
3809 {
3810 struct ieee80211_local *local = sdata->local;
3811
3812 sdata->u.mgd.status_fc = fc;
3813 sdata->u.mgd.status_acked = acked;
3814 sdata->u.mgd.status_received = true;
3815
3816 ieee80211_queue_work(&local->hw, &sdata->work);
3817 }
3818
3819 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3820 {
3821 struct ieee80211_local *local = sdata->local;
3822 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3823
3824 sdata_lock(sdata);
3825
3826 if (ifmgd->status_received) {
3827 __le16 fc = ifmgd->status_fc;
3828 bool status_acked = ifmgd->status_acked;
3829
3830 ifmgd->status_received = false;
3831 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3832 if (status_acked) {
3833 ifmgd->auth_data->timeout =
3834 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3835 run_again(sdata, ifmgd->auth_data->timeout);
3836 } else {
3837 ifmgd->auth_data->timeout = jiffies - 1;
3838 }
3839 ifmgd->auth_data->timeout_started = true;
3840 } else if (ifmgd->assoc_data &&
3841 (ieee80211_is_assoc_req(fc) ||
3842 ieee80211_is_reassoc_req(fc))) {
3843 if (status_acked) {
3844 ifmgd->assoc_data->timeout =
3845 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3846 run_again(sdata, ifmgd->assoc_data->timeout);
3847 } else {
3848 ifmgd->assoc_data->timeout = jiffies - 1;
3849 }
3850 ifmgd->assoc_data->timeout_started = true;
3851 }
3852 }
3853
3854 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3855 time_after(jiffies, ifmgd->auth_data->timeout)) {
3856 if (ifmgd->auth_data->done) {
3857 /*
3858 * ok ... we waited for assoc but userspace didn't,
3859 * so let's just kill the auth data
3860 */
3861 ieee80211_destroy_auth_data(sdata, false);
3862 } else if (ieee80211_auth(sdata)) {
3863 u8 bssid[ETH_ALEN];
3864 struct ieee80211_event event = {
3865 .type = MLME_EVENT,
3866 .u.mlme.data = AUTH_EVENT,
3867 .u.mlme.status = MLME_TIMEOUT,
3868 };
3869
3870 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3871
3872 ieee80211_destroy_auth_data(sdata, false);
3873
3874 cfg80211_auth_timeout(sdata->dev, bssid);
3875 drv_event_callback(sdata->local, sdata, &event);
3876 }
3877 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3878 run_again(sdata, ifmgd->auth_data->timeout);
3879
3880 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3881 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3882 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3883 ieee80211_do_assoc(sdata)) {
3884 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3885 struct ieee80211_event event = {
3886 .type = MLME_EVENT,
3887 .u.mlme.data = ASSOC_EVENT,
3888 .u.mlme.status = MLME_TIMEOUT,
3889 };
3890
3891 ieee80211_destroy_assoc_data(sdata, false);
3892 cfg80211_assoc_timeout(sdata->dev, bss);
3893 drv_event_callback(sdata->local, sdata, &event);
3894 }
3895 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3896 run_again(sdata, ifmgd->assoc_data->timeout);
3897
3898 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3899 ifmgd->associated) {
3900 u8 bssid[ETH_ALEN];
3901 int max_tries;
3902
3903 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3904
3905 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3906 max_tries = max_nullfunc_tries;
3907 else
3908 max_tries = max_probe_tries;
3909
3910 /* ACK received for nullfunc probing frame */
3911 if (!ifmgd->probe_send_count)
3912 ieee80211_reset_ap_probe(sdata);
3913 else if (ifmgd->nullfunc_failed) {
3914 if (ifmgd->probe_send_count < max_tries) {
3915 mlme_dbg(sdata,
3916 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3917 bssid, ifmgd->probe_send_count,
3918 max_tries);
3919 ieee80211_mgd_probe_ap_send(sdata);
3920 } else {
3921 mlme_dbg(sdata,
3922 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3923 bssid);
3924 ieee80211_sta_connection_lost(sdata, bssid,
3925 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3926 false);
3927 }
3928 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3929 run_again(sdata, ifmgd->probe_timeout);
3930 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3931 mlme_dbg(sdata,
3932 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3933 bssid, probe_wait_ms);
3934 ieee80211_sta_connection_lost(sdata, bssid,
3935 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3936 } else if (ifmgd->probe_send_count < max_tries) {
3937 mlme_dbg(sdata,
3938 "No probe response from AP %pM after %dms, try %d/%i\n",
3939 bssid, probe_wait_ms,
3940 ifmgd->probe_send_count, max_tries);
3941 ieee80211_mgd_probe_ap_send(sdata);
3942 } else {
3943 /*
3944 * We actually lost the connection ... or did we?
3945 * Let's make sure!
3946 */
3947 wiphy_debug(local->hw.wiphy,
3948 "%s: No probe response from AP %pM"
3949 " after %dms, disconnecting.\n",
3950 sdata->name,
3951 bssid, probe_wait_ms);
3952
3953 ieee80211_sta_connection_lost(sdata, bssid,
3954 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3955 }
3956 }
3957
3958 sdata_unlock(sdata);
3959 }
3960
3961 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3962 {
3963 struct ieee80211_sub_if_data *sdata =
3964 (struct ieee80211_sub_if_data *) data;
3965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3966
3967 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3968 return;
3969
3970 sdata->u.mgd.connection_loss = false;
3971 ieee80211_queue_work(&sdata->local->hw,
3972 &sdata->u.mgd.beacon_connection_loss_work);
3973 }
3974
3975 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3976 {
3977 struct ieee80211_sub_if_data *sdata =
3978 (struct ieee80211_sub_if_data *) data;
3979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3980 struct ieee80211_local *local = sdata->local;
3981
3982 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3983 return;
3984
3985 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3986 }
3987
3988 static void ieee80211_sta_monitor_work(struct work_struct *work)
3989 {
3990 struct ieee80211_sub_if_data *sdata =
3991 container_of(work, struct ieee80211_sub_if_data,
3992 u.mgd.monitor_work);
3993
3994 ieee80211_mgd_probe_ap(sdata, false);
3995 }
3996
3997 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3998 {
3999 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4000 __ieee80211_stop_poll(sdata);
4001
4002 /* let's probe the connection once */
4003 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4004 ieee80211_queue_work(&sdata->local->hw,
4005 &sdata->u.mgd.monitor_work);
4006 /* and do all the other regular work too */
4007 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4008 }
4009 }
4010
4011 #ifdef CONFIG_PM
4012 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4013 {
4014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4015 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4016
4017 sdata_lock(sdata);
4018
4019 if (ifmgd->auth_data || ifmgd->assoc_data) {
4020 const u8 *bssid = ifmgd->auth_data ?
4021 ifmgd->auth_data->bss->bssid :
4022 ifmgd->assoc_data->bss->bssid;
4023
4024 /*
4025 * If we are trying to authenticate / associate while suspending,
4026 * cfg80211 won't know and won't actually abort those attempts,
4027 * thus we need to do that ourselves.
4028 */
4029 ieee80211_send_deauth_disassoc(sdata, bssid,
4030 IEEE80211_STYPE_DEAUTH,
4031 WLAN_REASON_DEAUTH_LEAVING,
4032 false, frame_buf);
4033 if (ifmgd->assoc_data)
4034 ieee80211_destroy_assoc_data(sdata, false);
4035 if (ifmgd->auth_data)
4036 ieee80211_destroy_auth_data(sdata, false);
4037 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4038 IEEE80211_DEAUTH_FRAME_LEN);
4039 }
4040
4041 /* This is a bit of a hack - we should find a better and more generic
4042 * solution to this. Normally when suspending, cfg80211 will in fact
4043 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4044 * auth (not so important) or assoc (this is the problem) process.
4045 *
4046 * As a consequence, it can happen that we are in the process of both
4047 * associating and suspending, and receive an association response
4048 * after cfg80211 has checked if it needs to disconnect, but before
4049 * we actually set the flag to drop incoming frames. This will then
4050 * cause the workqueue flush to process the association response in
4051 * the suspend, resulting in a successful association just before it
4052 * tries to remove the interface from the driver, which now though
4053 * has a channel context assigned ... this results in issues.
4054 *
4055 * To work around this (for now) simply deauth here again if we're
4056 * now connected.
4057 */
4058 if (ifmgd->associated && !sdata->local->wowlan) {
4059 u8 bssid[ETH_ALEN];
4060 struct cfg80211_deauth_request req = {
4061 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4062 .bssid = bssid,
4063 };
4064
4065 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4066 ieee80211_mgd_deauth(sdata, &req);
4067 }
4068
4069 sdata_unlock(sdata);
4070 }
4071
4072 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4073 {
4074 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4075
4076 sdata_lock(sdata);
4077 if (!ifmgd->associated) {
4078 sdata_unlock(sdata);
4079 return;
4080 }
4081
4082 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4083 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4084 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4085 ieee80211_sta_connection_lost(sdata,
4086 ifmgd->associated->bssid,
4087 WLAN_REASON_UNSPECIFIED,
4088 true);
4089 sdata_unlock(sdata);
4090 return;
4091 }
4092 sdata_unlock(sdata);
4093 }
4094 #endif
4095
4096 /* interface setup */
4097 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4098 {
4099 struct ieee80211_if_managed *ifmgd;
4100
4101 ifmgd = &sdata->u.mgd;
4102 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4103 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4104 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4105 ieee80211_beacon_connection_loss_work);
4106 INIT_WORK(&ifmgd->csa_connection_drop_work,
4107 ieee80211_csa_connection_drop_work);
4108 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4109 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4110 ieee80211_tdls_peer_del_work);
4111 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4112 (unsigned long) sdata);
4113 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4114 (unsigned long) sdata);
4115 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4116 (unsigned long) sdata);
4117 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4118 (unsigned long) sdata);
4119 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4120 ieee80211_sta_handle_tspec_ac_params_wk);
4121
4122 ifmgd->flags = 0;
4123 ifmgd->powersave = sdata->wdev.ps;
4124 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4125 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4126 ifmgd->p2p_noa_index = -1;
4127
4128 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4129 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4130 else
4131 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4132
4133 /* Setup TDLS data */
4134 spin_lock_init(&ifmgd->teardown_lock);
4135 ifmgd->teardown_skb = NULL;
4136 ifmgd->orig_teardown_skb = NULL;
4137 }
4138
4139 /* scan finished notification */
4140 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4141 {
4142 struct ieee80211_sub_if_data *sdata;
4143
4144 /* Restart STA timers */
4145 rcu_read_lock();
4146 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4147 if (ieee80211_sdata_running(sdata))
4148 ieee80211_restart_sta_timer(sdata);
4149 }
4150 rcu_read_unlock();
4151 }
4152
4153 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4154 struct cfg80211_bss *cbss)
4155 {
4156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4157 const u8 *ht_cap_ie, *vht_cap_ie;
4158 const struct ieee80211_ht_cap *ht_cap;
4159 const struct ieee80211_vht_cap *vht_cap;
4160 u8 chains = 1;
4161
4162 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4163 return chains;
4164
4165 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4166 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4167 ht_cap = (void *)(ht_cap_ie + 2);
4168 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4169 /*
4170 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4171 * "Tx Unequal Modulation Supported" fields.
4172 */
4173 }
4174
4175 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4176 return chains;
4177
4178 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4179 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4180 u8 nss;
4181 u16 tx_mcs_map;
4182
4183 vht_cap = (void *)(vht_cap_ie + 2);
4184 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4185 for (nss = 8; nss > 0; nss--) {
4186 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4187 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4188 break;
4189 }
4190 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4191 chains = max(chains, nss);
4192 }
4193
4194 return chains;
4195 }
4196
4197 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4198 struct cfg80211_bss *cbss)
4199 {
4200 struct ieee80211_local *local = sdata->local;
4201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4202 const struct ieee80211_ht_cap *ht_cap = NULL;
4203 const struct ieee80211_ht_operation *ht_oper = NULL;
4204 const struct ieee80211_vht_operation *vht_oper = NULL;
4205 struct ieee80211_supported_band *sband;
4206 struct cfg80211_chan_def chandef;
4207 int ret;
4208 u32 i;
4209 bool have_80mhz;
4210
4211 sband = local->hw.wiphy->bands[cbss->channel->band];
4212
4213 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4214 IEEE80211_STA_DISABLE_80P80MHZ |
4215 IEEE80211_STA_DISABLE_160MHZ);
4216
4217 rcu_read_lock();
4218
4219 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4220 sband->ht_cap.ht_supported) {
4221 const u8 *ht_oper_ie, *ht_cap_ie;
4222
4223 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4224 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4225 ht_oper = (void *)(ht_oper_ie + 2);
4226
4227 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4228 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4229 ht_cap = (void *)(ht_cap_ie + 2);
4230
4231 if (!ht_cap) {
4232 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4233 ht_oper = NULL;
4234 }
4235 }
4236
4237 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4238 sband->vht_cap.vht_supported) {
4239 const u8 *vht_oper_ie, *vht_cap;
4240
4241 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4242 WLAN_EID_VHT_OPERATION);
4243 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4244 vht_oper = (void *)(vht_oper_ie + 2);
4245 if (vht_oper && !ht_oper) {
4246 vht_oper = NULL;
4247 sdata_info(sdata,
4248 "AP advertised VHT without HT, disabling both\n");
4249 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4250 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4251 }
4252
4253 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4254 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4255 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4256 vht_oper = NULL;
4257 }
4258 }
4259
4260 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4261 have_80mhz = false;
4262 for (i = 0; i < sband->n_channels; i++) {
4263 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4264 IEEE80211_CHAN_NO_80MHZ))
4265 continue;
4266
4267 have_80mhz = true;
4268 break;
4269 }
4270
4271 if (!have_80mhz)
4272 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4273
4274 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4275 cbss->channel,
4276 ht_cap, ht_oper, vht_oper,
4277 &chandef, false);
4278
4279 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4280 local->rx_chains);
4281
4282 rcu_read_unlock();
4283
4284 /* will change later if needed */
4285 sdata->smps_mode = IEEE80211_SMPS_OFF;
4286
4287 mutex_lock(&local->mtx);
4288 /*
4289 * If this fails (possibly due to channel context sharing
4290 * on incompatible channels, e.g. 80+80 and 160 sharing the
4291 * same control channel) try to use a smaller bandwidth.
4292 */
4293 ret = ieee80211_vif_use_channel(sdata, &chandef,
4294 IEEE80211_CHANCTX_SHARED);
4295
4296 /* don't downgrade for 5 and 10 MHz channels, though. */
4297 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4298 chandef.width == NL80211_CHAN_WIDTH_10)
4299 goto out;
4300
4301 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4302 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4303 ret = ieee80211_vif_use_channel(sdata, &chandef,
4304 IEEE80211_CHANCTX_SHARED);
4305 }
4306 out:
4307 mutex_unlock(&local->mtx);
4308 return ret;
4309 }
4310
4311 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4312 struct cfg80211_bss *cbss, bool assoc,
4313 bool override)
4314 {
4315 struct ieee80211_local *local = sdata->local;
4316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4317 struct ieee80211_bss *bss = (void *)cbss->priv;
4318 struct sta_info *new_sta = NULL;
4319 struct ieee80211_supported_band *sband;
4320 bool have_sta = false;
4321 int err;
4322
4323 sband = local->hw.wiphy->bands[cbss->channel->band];
4324
4325 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4326 return -EINVAL;
4327
4328 if (assoc) {
4329 rcu_read_lock();
4330 have_sta = sta_info_get(sdata, cbss->bssid);
4331 rcu_read_unlock();
4332 }
4333
4334 if (!have_sta) {
4335 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4336 if (!new_sta)
4337 return -ENOMEM;
4338 }
4339
4340 if (new_sta || override) {
4341 err = ieee80211_prep_channel(sdata, cbss);
4342 if (err) {
4343 if (new_sta)
4344 sta_info_free(local, new_sta);
4345 return -EINVAL;
4346 }
4347 }
4348
4349 if (new_sta) {
4350 u32 rates = 0, basic_rates = 0;
4351 bool have_higher_than_11mbit;
4352 int min_rate = INT_MAX, min_rate_index = -1;
4353 struct ieee80211_chanctx_conf *chanctx_conf;
4354 const struct cfg80211_bss_ies *ies;
4355 int shift = ieee80211_vif_get_shift(&sdata->vif);
4356 u32 rate_flags;
4357
4358 rcu_read_lock();
4359 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4360 if (WARN_ON(!chanctx_conf)) {
4361 rcu_read_unlock();
4362 sta_info_free(local, new_sta);
4363 return -EINVAL;
4364 }
4365 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4366 rcu_read_unlock();
4367
4368 ieee80211_get_rates(sband, bss->supp_rates,
4369 bss->supp_rates_len,
4370 &rates, &basic_rates,
4371 &have_higher_than_11mbit,
4372 &min_rate, &min_rate_index,
4373 shift, rate_flags);
4374
4375 /*
4376 * This used to be a workaround for basic rates missing
4377 * in the association response frame. Now that we no
4378 * longer use the basic rates from there, it probably
4379 * doesn't happen any more, but keep the workaround so
4380 * in case some *other* APs are buggy in different ways
4381 * we can connect -- with a warning.
4382 */
4383 if (!basic_rates && min_rate_index >= 0) {
4384 sdata_info(sdata,
4385 "No basic rates, using min rate instead\n");
4386 basic_rates = BIT(min_rate_index);
4387 }
4388
4389 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4390 sdata->vif.bss_conf.basic_rates = basic_rates;
4391
4392 /* cf. IEEE 802.11 9.2.12 */
4393 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4394 have_higher_than_11mbit)
4395 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4396 else
4397 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4398
4399 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4400
4401 /* set timing information */
4402 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4403 rcu_read_lock();
4404 ies = rcu_dereference(cbss->beacon_ies);
4405 if (ies) {
4406 const u8 *tim_ie;
4407
4408 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4409 sdata->vif.bss_conf.sync_device_ts =
4410 bss->device_ts_beacon;
4411 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4412 ies->data, ies->len);
4413 if (tim_ie && tim_ie[1] >= 2)
4414 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4415 else
4416 sdata->vif.bss_conf.sync_dtim_count = 0;
4417 } else if (!ieee80211_hw_check(&sdata->local->hw,
4418 TIMING_BEACON_ONLY)) {
4419 ies = rcu_dereference(cbss->proberesp_ies);
4420 /* must be non-NULL since beacon IEs were NULL */
4421 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4422 sdata->vif.bss_conf.sync_device_ts =
4423 bss->device_ts_presp;
4424 sdata->vif.bss_conf.sync_dtim_count = 0;
4425 } else {
4426 sdata->vif.bss_conf.sync_tsf = 0;
4427 sdata->vif.bss_conf.sync_device_ts = 0;
4428 sdata->vif.bss_conf.sync_dtim_count = 0;
4429 }
4430 rcu_read_unlock();
4431
4432 /* tell driver about BSSID, basic rates and timing */
4433 ieee80211_bss_info_change_notify(sdata,
4434 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4435 BSS_CHANGED_BEACON_INT);
4436
4437 if (assoc)
4438 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4439
4440 err = sta_info_insert(new_sta);
4441 new_sta = NULL;
4442 if (err) {
4443 sdata_info(sdata,
4444 "failed to insert STA entry for the AP (error %d)\n",
4445 err);
4446 return err;
4447 }
4448 } else
4449 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4450
4451 /* Cancel scan to ensure that nothing interferes with connection */
4452 if (local->scanning)
4453 ieee80211_scan_cancel(local);
4454
4455 return 0;
4456 }
4457
4458 /* config hooks */
4459 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4460 struct cfg80211_auth_request *req)
4461 {
4462 struct ieee80211_local *local = sdata->local;
4463 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4464 struct ieee80211_mgd_auth_data *auth_data;
4465 u16 auth_alg;
4466 int err;
4467
4468 /* prepare auth data structure */
4469
4470 switch (req->auth_type) {
4471 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4472 auth_alg = WLAN_AUTH_OPEN;
4473 break;
4474 case NL80211_AUTHTYPE_SHARED_KEY:
4475 if (IS_ERR(local->wep_tx_tfm))
4476 return -EOPNOTSUPP;
4477 auth_alg = WLAN_AUTH_SHARED_KEY;
4478 break;
4479 case NL80211_AUTHTYPE_FT:
4480 auth_alg = WLAN_AUTH_FT;
4481 break;
4482 case NL80211_AUTHTYPE_NETWORK_EAP:
4483 auth_alg = WLAN_AUTH_LEAP;
4484 break;
4485 case NL80211_AUTHTYPE_SAE:
4486 auth_alg = WLAN_AUTH_SAE;
4487 break;
4488 default:
4489 return -EOPNOTSUPP;
4490 }
4491
4492 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4493 req->ie_len, GFP_KERNEL);
4494 if (!auth_data)
4495 return -ENOMEM;
4496
4497 auth_data->bss = req->bss;
4498
4499 if (req->sae_data_len >= 4) {
4500 __le16 *pos = (__le16 *) req->sae_data;
4501 auth_data->sae_trans = le16_to_cpu(pos[0]);
4502 auth_data->sae_status = le16_to_cpu(pos[1]);
4503 memcpy(auth_data->data, req->sae_data + 4,
4504 req->sae_data_len - 4);
4505 auth_data->data_len += req->sae_data_len - 4;
4506 }
4507
4508 if (req->ie && req->ie_len) {
4509 memcpy(&auth_data->data[auth_data->data_len],
4510 req->ie, req->ie_len);
4511 auth_data->data_len += req->ie_len;
4512 }
4513
4514 if (req->key && req->key_len) {
4515 auth_data->key_len = req->key_len;
4516 auth_data->key_idx = req->key_idx;
4517 memcpy(auth_data->key, req->key, req->key_len);
4518 }
4519
4520 auth_data->algorithm = auth_alg;
4521
4522 /* try to authenticate/probe */
4523
4524 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4525 ifmgd->assoc_data) {
4526 err = -EBUSY;
4527 goto err_free;
4528 }
4529
4530 if (ifmgd->auth_data)
4531 ieee80211_destroy_auth_data(sdata, false);
4532
4533 /* prep auth_data so we don't go into idle on disassoc */
4534 ifmgd->auth_data = auth_data;
4535
4536 if (ifmgd->associated) {
4537 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4538
4539 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4540 WLAN_REASON_UNSPECIFIED,
4541 false, frame_buf);
4542
4543 ieee80211_report_disconnect(sdata, frame_buf,
4544 sizeof(frame_buf), true,
4545 WLAN_REASON_UNSPECIFIED);
4546 }
4547
4548 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4549
4550 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4551 if (err)
4552 goto err_clear;
4553
4554 err = ieee80211_auth(sdata);
4555 if (err) {
4556 sta_info_destroy_addr(sdata, req->bss->bssid);
4557 goto err_clear;
4558 }
4559
4560 /* hold our own reference */
4561 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4562 return 0;
4563
4564 err_clear:
4565 eth_zero_addr(ifmgd->bssid);
4566 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4567 ifmgd->auth_data = NULL;
4568 mutex_lock(&sdata->local->mtx);
4569 ieee80211_vif_release_channel(sdata);
4570 mutex_unlock(&sdata->local->mtx);
4571 err_free:
4572 kfree(auth_data);
4573 return err;
4574 }
4575
4576 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4577 struct cfg80211_assoc_request *req)
4578 {
4579 struct ieee80211_local *local = sdata->local;
4580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4581 struct ieee80211_bss *bss = (void *)req->bss->priv;
4582 struct ieee80211_mgd_assoc_data *assoc_data;
4583 const struct cfg80211_bss_ies *beacon_ies;
4584 struct ieee80211_supported_band *sband;
4585 const u8 *ssidie, *ht_ie, *vht_ie;
4586 int i, err;
4587 bool override = false;
4588
4589 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4590 if (!assoc_data)
4591 return -ENOMEM;
4592
4593 rcu_read_lock();
4594 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4595 if (!ssidie) {
4596 rcu_read_unlock();
4597 kfree(assoc_data);
4598 return -EINVAL;
4599 }
4600 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4601 assoc_data->ssid_len = ssidie[1];
4602 rcu_read_unlock();
4603
4604 if (ifmgd->associated) {
4605 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4606
4607 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4608 WLAN_REASON_UNSPECIFIED,
4609 false, frame_buf);
4610
4611 ieee80211_report_disconnect(sdata, frame_buf,
4612 sizeof(frame_buf), true,
4613 WLAN_REASON_UNSPECIFIED);
4614 }
4615
4616 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4617 err = -EBUSY;
4618 goto err_free;
4619 }
4620
4621 if (ifmgd->assoc_data) {
4622 err = -EBUSY;
4623 goto err_free;
4624 }
4625
4626 if (ifmgd->auth_data) {
4627 bool match;
4628
4629 /* keep sta info, bssid if matching */
4630 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4631 ieee80211_destroy_auth_data(sdata, match);
4632 }
4633
4634 /* prepare assoc data */
4635
4636 ifmgd->beacon_crc_valid = false;
4637
4638 assoc_data->wmm = bss->wmm_used &&
4639 (local->hw.queues >= IEEE80211_NUM_ACS);
4640
4641 /*
4642 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4643 * We still associate in non-HT mode (11a/b/g) if any one of these
4644 * ciphers is configured as pairwise.
4645 * We can set this to true for non-11n hardware, that'll be checked
4646 * separately along with the peer capabilities.
4647 */
4648 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4649 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4650 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4651 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4652 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4653 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4654 netdev_info(sdata->dev,
4655 "disabling HT/VHT due to WEP/TKIP use\n");
4656 }
4657 }
4658
4659 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4660 sband = local->hw.wiphy->bands[req->bss->channel->band];
4661 if (!sband->ht_cap.ht_supported ||
4662 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4663 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4664 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4665 if (!bss->wmm_used &&
4666 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4667 netdev_info(sdata->dev,
4668 "disabling HT as WMM/QoS is not supported by the AP\n");
4669 }
4670
4671 /* disable VHT if we don't support it or the AP doesn't use WMM */
4672 if (!sband->vht_cap.vht_supported ||
4673 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4674 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4675 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4676 if (!bss->wmm_used &&
4677 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4678 netdev_info(sdata->dev,
4679 "disabling VHT as WMM/QoS is not supported by the AP\n");
4680 }
4681
4682 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4683 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4684 sizeof(ifmgd->ht_capa_mask));
4685
4686 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4687 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4688 sizeof(ifmgd->vht_capa_mask));
4689
4690 if (req->ie && req->ie_len) {
4691 memcpy(assoc_data->ie, req->ie, req->ie_len);
4692 assoc_data->ie_len = req->ie_len;
4693 }
4694
4695 assoc_data->bss = req->bss;
4696
4697 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4698 if (ifmgd->powersave)
4699 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4700 else
4701 sdata->smps_mode = IEEE80211_SMPS_OFF;
4702 } else
4703 sdata->smps_mode = ifmgd->req_smps;
4704
4705 assoc_data->capability = req->bss->capability;
4706 assoc_data->supp_rates = bss->supp_rates;
4707 assoc_data->supp_rates_len = bss->supp_rates_len;
4708
4709 rcu_read_lock();
4710 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4711 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4712 assoc_data->ap_ht_param =
4713 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4714 else
4715 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4716 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4717 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4718 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4719 sizeof(struct ieee80211_vht_cap));
4720 else
4721 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4722 rcu_read_unlock();
4723
4724 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4725 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4726 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4727 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4728
4729 if (bss->wmm_used && bss->uapsd_supported &&
4730 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4731 assoc_data->uapsd = true;
4732 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4733 } else {
4734 assoc_data->uapsd = false;
4735 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4736 }
4737
4738 if (req->prev_bssid)
4739 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4740
4741 if (req->use_mfp) {
4742 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4743 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4744 } else {
4745 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4746 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4747 }
4748
4749 if (req->flags & ASSOC_REQ_USE_RRM)
4750 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4751 else
4752 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4753
4754 if (req->crypto.control_port)
4755 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4756 else
4757 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4758
4759 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4760 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4761 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4762 sdata->vif.type);
4763
4764 /* kick off associate process */
4765
4766 ifmgd->assoc_data = assoc_data;
4767 ifmgd->dtim_period = 0;
4768 ifmgd->have_beacon = false;
4769
4770 /* override HT/VHT configuration only if the AP and we support it */
4771 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4772 struct ieee80211_sta_ht_cap sta_ht_cap;
4773
4774 if (req->flags & ASSOC_REQ_DISABLE_HT)
4775 override = true;
4776
4777 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4778 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4779
4780 /* check for 40 MHz disable override */
4781 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4782 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4783 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4784 override = true;
4785
4786 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4787 req->flags & ASSOC_REQ_DISABLE_VHT)
4788 override = true;
4789 }
4790
4791 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4792 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4793 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4794 }
4795
4796 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4797 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4798
4799 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4800 if (err)
4801 goto err_clear;
4802
4803 rcu_read_lock();
4804 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4805
4806 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4807 !beacon_ies) {
4808 /*
4809 * Wait up to one beacon interval ...
4810 * should this be more if we miss one?
4811 */
4812 sdata_info(sdata, "waiting for beacon from %pM\n",
4813 ifmgd->bssid);
4814 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4815 assoc_data->timeout_started = true;
4816 assoc_data->need_beacon = true;
4817 } else if (beacon_ies) {
4818 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4819 beacon_ies->data,
4820 beacon_ies->len);
4821 u8 dtim_count = 0;
4822
4823 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4824 const struct ieee80211_tim_ie *tim;
4825 tim = (void *)(tim_ie + 2);
4826 ifmgd->dtim_period = tim->dtim_period;
4827 dtim_count = tim->dtim_count;
4828 }
4829 ifmgd->have_beacon = true;
4830 assoc_data->timeout = jiffies;
4831 assoc_data->timeout_started = true;
4832
4833 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4834 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4835 sdata->vif.bss_conf.sync_device_ts =
4836 bss->device_ts_beacon;
4837 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4838 }
4839 } else {
4840 assoc_data->timeout = jiffies;
4841 assoc_data->timeout_started = true;
4842 }
4843 rcu_read_unlock();
4844
4845 run_again(sdata, assoc_data->timeout);
4846
4847 if (bss->corrupt_data) {
4848 char *corrupt_type = "data";
4849 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4850 if (bss->corrupt_data &
4851 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4852 corrupt_type = "beacon and probe response";
4853 else
4854 corrupt_type = "beacon";
4855 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4856 corrupt_type = "probe response";
4857 sdata_info(sdata, "associating with AP with corrupt %s\n",
4858 corrupt_type);
4859 }
4860
4861 return 0;
4862 err_clear:
4863 eth_zero_addr(ifmgd->bssid);
4864 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4865 ifmgd->assoc_data = NULL;
4866 err_free:
4867 kfree(assoc_data);
4868 return err;
4869 }
4870
4871 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4872 struct cfg80211_deauth_request *req)
4873 {
4874 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4875 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4876 bool tx = !req->local_state_change;
4877
4878 if (ifmgd->auth_data &&
4879 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4880 sdata_info(sdata,
4881 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4882 req->bssid, req->reason_code,
4883 ieee80211_get_reason_code_string(req->reason_code));
4884
4885 drv_mgd_prepare_tx(sdata->local, sdata);
4886 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4887 IEEE80211_STYPE_DEAUTH,
4888 req->reason_code, tx,
4889 frame_buf);
4890 ieee80211_destroy_auth_data(sdata, false);
4891 ieee80211_report_disconnect(sdata, frame_buf,
4892 sizeof(frame_buf), true,
4893 req->reason_code);
4894
4895 return 0;
4896 }
4897
4898 if (ifmgd->assoc_data &&
4899 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4900 sdata_info(sdata,
4901 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4902 req->bssid, req->reason_code,
4903 ieee80211_get_reason_code_string(req->reason_code));
4904
4905 drv_mgd_prepare_tx(sdata->local, sdata);
4906 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4907 IEEE80211_STYPE_DEAUTH,
4908 req->reason_code, tx,
4909 frame_buf);
4910 ieee80211_destroy_assoc_data(sdata, false);
4911 ieee80211_report_disconnect(sdata, frame_buf,
4912 sizeof(frame_buf), true,
4913 req->reason_code);
4914 return 0;
4915 }
4916
4917 if (ifmgd->associated &&
4918 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4919 sdata_info(sdata,
4920 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4921 req->bssid, req->reason_code,
4922 ieee80211_get_reason_code_string(req->reason_code));
4923
4924 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4925 req->reason_code, tx, frame_buf);
4926 ieee80211_report_disconnect(sdata, frame_buf,
4927 sizeof(frame_buf), true,
4928 req->reason_code);
4929 return 0;
4930 }
4931
4932 return -ENOTCONN;
4933 }
4934
4935 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4936 struct cfg80211_disassoc_request *req)
4937 {
4938 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4939 u8 bssid[ETH_ALEN];
4940 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4941
4942 /*
4943 * cfg80211 should catch this ... but it's racy since
4944 * we can receive a disassoc frame, process it, hand it
4945 * to cfg80211 while that's in a locked section already
4946 * trying to tell us that the user wants to disconnect.
4947 */
4948 if (ifmgd->associated != req->bss)
4949 return -ENOLINK;
4950
4951 sdata_info(sdata,
4952 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4953 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4954
4955 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4956 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4957 req->reason_code, !req->local_state_change,
4958 frame_buf);
4959
4960 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4961 req->reason_code);
4962
4963 return 0;
4964 }
4965
4966 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4967 {
4968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4969
4970 /*
4971 * Make sure some work items will not run after this,
4972 * they will not do anything but might not have been
4973 * cancelled when disconnecting.
4974 */
4975 cancel_work_sync(&ifmgd->monitor_work);
4976 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4977 cancel_work_sync(&ifmgd->request_smps_work);
4978 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4979 cancel_work_sync(&ifmgd->chswitch_work);
4980 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4981
4982 sdata_lock(sdata);
4983 if (ifmgd->assoc_data) {
4984 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4985 ieee80211_destroy_assoc_data(sdata, false);
4986 cfg80211_assoc_timeout(sdata->dev, bss);
4987 }
4988 if (ifmgd->auth_data)
4989 ieee80211_destroy_auth_data(sdata, false);
4990 spin_lock_bh(&ifmgd->teardown_lock);
4991 if (ifmgd->teardown_skb) {
4992 kfree_skb(ifmgd->teardown_skb);
4993 ifmgd->teardown_skb = NULL;
4994 ifmgd->orig_teardown_skb = NULL;
4995 }
4996 spin_unlock_bh(&ifmgd->teardown_lock);
4997 del_timer_sync(&ifmgd->timer);
4998 sdata_unlock(sdata);
4999 }
5000
5001 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5002 enum nl80211_cqm_rssi_threshold_event rssi_event,
5003 gfp_t gfp)
5004 {
5005 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5006
5007 trace_api_cqm_rssi_notify(sdata, rssi_event);
5008
5009 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5010 }
5011 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5012
5013 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5014 {
5015 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5016
5017 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5018
5019 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5020 }
5021 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux with added FPC-III support