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mac80211: add WMM admission control support
[deliverable/linux.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/pm_qos.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.h"
33
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
43
44 static int max_nullfunc_tries = 2;
45 module_param(max_nullfunc_tries, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49 static int max_probe_tries = 5;
50 module_param(max_probe_tries, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
53
54 /*
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
61 */
62 static int beacon_loss_count = 7;
63 module_param(beacon_loss_count, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
66
67 /*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 /*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
77 static int probe_wait_ms = 500;
78 module_param(probe_wait_ms, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
82
83 /*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
90 /*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
96 /*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
106 static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
108 {
109 sdata_assert_lock(sdata);
110
111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
114 }
115
116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 {
118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
119 return;
120
121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
126 }
127
128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 {
130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
135 ifmgd->probe_send_count = 0;
136
137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142 }
143
144 static int ecw2cw(int ecw)
145 {
146 return (1 << ecw) - 1;
147 }
148
149 static u32
150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
153 const struct ieee80211_ht_cap *ht_cap,
154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
156 struct cfg80211_chan_def *chandef, bool tracking)
157 {
158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159 struct cfg80211_chan_def vht_chandef;
160 u32 ht_cfreq, ret;
161
162 chandef->chan = channel;
163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
164 chandef->center_freq1 = channel->center_freq;
165 chandef->center_freq2 = 0;
166
167 if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) {
168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
169 goto out;
170 }
171
172 chandef->width = NL80211_CHAN_WIDTH_20;
173
174 if (!(ht_cap->cap_info &
175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
176 ret = IEEE80211_STA_DISABLE_40MHZ;
177 goto out;
178 }
179
180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
183 if (!tracking && channel->center_freq != ht_cfreq) {
184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
203 chandef->width = NL80211_CHAN_WIDTH_40;
204 chandef->center_freq1 += 10;
205 break;
206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
207 chandef->width = NL80211_CHAN_WIDTH_40;
208 chandef->center_freq1 -= 10;
209 break;
210 }
211 } else {
212 /* 40 MHz (and 80 MHz) must be supported for VHT */
213 ret = IEEE80211_STA_DISABLE_VHT;
214 /* also mark 40 MHz disabled */
215 ret |= IEEE80211_STA_DISABLE_40MHZ;
216 goto out;
217 }
218
219 if (!vht_oper || !sband->vht_cap.vht_supported) {
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 vht_chandef.chan = channel;
225 vht_chandef.center_freq1 =
226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
227 channel->band);
228 vht_chandef.center_freq2 = 0;
229
230 switch (vht_oper->chan_width) {
231 case IEEE80211_VHT_CHANWIDTH_USE_HT:
232 vht_chandef.width = chandef->width;
233 vht_chandef.center_freq1 = chandef->center_freq1;
234 break;
235 case IEEE80211_VHT_CHANWIDTH_80MHZ:
236 vht_chandef.width = NL80211_CHAN_WIDTH_80;
237 break;
238 case IEEE80211_VHT_CHANWIDTH_160MHZ:
239 vht_chandef.width = NL80211_CHAN_WIDTH_160;
240 break;
241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
243 vht_chandef.center_freq2 =
244 ieee80211_channel_to_frequency(
245 vht_oper->center_freq_seg2_idx,
246 channel->band);
247 break;
248 default:
249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
250 sdata_info(sdata,
251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
252 vht_oper->chan_width);
253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (!cfg80211_chandef_valid(&vht_chandef)) {
258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
259 sdata_info(sdata,
260 "AP VHT information is invalid, disable VHT\n");
261 ret = IEEE80211_STA_DISABLE_VHT;
262 goto out;
263 }
264
265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
266 ret = 0;
267 goto out;
268 }
269
270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
272 sdata_info(sdata,
273 "AP VHT information doesn't match HT, disable VHT\n");
274 ret = IEEE80211_STA_DISABLE_VHT;
275 goto out;
276 }
277
278 *chandef = vht_chandef;
279
280 ret = 0;
281
282 out:
283 /*
284 * When tracking the current AP, don't do any further checks if the
285 * new chandef is identical to the one we're currently using for the
286 * connection. This keeps us from playing ping-pong with regulatory,
287 * without it the following can happen (for example):
288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
289 * - AP advertises regdom US
290 * - CRDA loads regdom US with 80 MHz prohibited (old database)
291 * - the code below detects an unsupported channel, downgrades, and
292 * we disconnect from the AP in the caller
293 * - disconnect causes CRDA to reload world regdomain and the game
294 * starts anew.
295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 *
297 * It seems possible that there are still scenarios with CSA or real
298 * bandwidth changes where a this could happen, but those cases are
299 * less common and wouldn't completely prevent using the AP.
300 */
301 if (tracking &&
302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
303 return ret;
304
305 /* don't print the message below for VHT mismatch if VHT is disabled */
306 if (ret & IEEE80211_STA_DISABLE_VHT)
307 vht_chandef = *chandef;
308
309 /*
310 * Ignore the DISABLED flag when we're already connected and only
311 * tracking the APs beacon for bandwidth changes - otherwise we
312 * might get disconnected here if we connect to an AP, update our
313 * regulatory information based on the AP's country IE and the
314 * information we have is wrong/outdated and disables the channel
315 * that we're actually using for the connection to the AP.
316 */
317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
318 tracking ? 0 :
319 IEEE80211_CHAN_DISABLED)) {
320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
321 ret = IEEE80211_STA_DISABLE_HT |
322 IEEE80211_STA_DISABLE_VHT;
323 break;
324 }
325
326 ret |= ieee80211_chandef_downgrade(chandef);
327 }
328
329 if (chandef->width != vht_chandef.width && !tracking)
330 sdata_info(sdata,
331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
332
333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
334 return ret;
335 }
336
337 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
338 struct sta_info *sta,
339 const struct ieee80211_ht_cap *ht_cap,
340 const struct ieee80211_ht_operation *ht_oper,
341 const struct ieee80211_vht_operation *vht_oper,
342 const u8 *bssid, u32 *changed)
343 {
344 struct ieee80211_local *local = sdata->local;
345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
346 struct ieee80211_supported_band *sband;
347 struct ieee80211_channel *chan;
348 struct cfg80211_chan_def chandef;
349 u16 ht_opmode;
350 u32 flags;
351 enum ieee80211_sta_rx_bandwidth new_sta_bw;
352 int ret;
353
354 /* if HT was/is disabled, don't track any bandwidth changes */
355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
356 return 0;
357
358 /* don't check VHT if we associated as non-VHT station */
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
360 vht_oper = NULL;
361
362 if (WARN_ON_ONCE(!sta))
363 return -EINVAL;
364
365 /*
366 * if bss configuration changed store the new one -
367 * this may be applicable even if channel is identical
368 */
369 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
371 *changed |= BSS_CHANGED_HT;
372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
373 }
374
375 chan = sdata->vif.bss_conf.chandef.chan;
376 sband = local->hw.wiphy->bands[chan->band];
377
378 /* calculate new channel (type) based on HT/VHT operation IEs */
379 flags = ieee80211_determine_chantype(sdata, sband, chan,
380 ht_cap, ht_oper, vht_oper,
381 &chandef, true);
382
383 /*
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
389 */
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
392 flags |= ieee80211_chandef_downgrade(&chandef);
393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
395 flags |= ieee80211_chandef_downgrade(&chandef);
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
398 flags |= ieee80211_chandef_downgrade(&chandef);
399
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
401 return 0;
402
403 sdata_info(sdata,
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
407
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
414 sdata_info(sdata,
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
416 ifmgd->bssid);
417 return -EINVAL;
418 }
419
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
424 break;
425 case NL80211_CHAN_WIDTH_40:
426 new_sta_bw = IEEE80211_STA_RX_BW_40;
427 break;
428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
430 break;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
434 break;
435 default:
436 return -EINVAL;
437 }
438
439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
441
442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
447
448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 if (ret) {
450 sdata_info(sdata,
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
452 ifmgd->bssid);
453 return ret;
454 }
455
456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
460 }
461
462 return 0;
463 }
464
465 /* frame sending functions */
466
467 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
468 struct sk_buff *skb, u8 ap_ht_param,
469 struct ieee80211_supported_band *sband,
470 struct ieee80211_channel *channel,
471 enum ieee80211_smps_mode smps)
472 {
473 u8 *pos;
474 u32 flags = channel->flags;
475 u16 cap;
476 struct ieee80211_sta_ht_cap ht_cap;
477
478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
479
480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
481 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
482
483 /* determine capability flags */
484 cap = ht_cap.cap;
485
486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
490 cap &= ~IEEE80211_HT_CAP_SGI_40;
491 }
492 break;
493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498 break;
499 }
500
501 /*
502 * If 40 MHz was disabled associate as though we weren't
503 * capable of 40 MHz -- some broken APs will never fall
504 * back to trying to transmit in 20 MHz.
505 */
506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
508 cap &= ~IEEE80211_HT_CAP_SGI_40;
509 }
510
511 /* set SM PS mode properly */
512 cap &= ~IEEE80211_HT_CAP_SM_PS;
513 switch (smps) {
514 case IEEE80211_SMPS_AUTOMATIC:
515 case IEEE80211_SMPS_NUM_MODES:
516 WARN_ON(1);
517 case IEEE80211_SMPS_OFF:
518 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
519 IEEE80211_HT_CAP_SM_PS_SHIFT;
520 break;
521 case IEEE80211_SMPS_STATIC:
522 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
523 IEEE80211_HT_CAP_SM_PS_SHIFT;
524 break;
525 case IEEE80211_SMPS_DYNAMIC:
526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
527 IEEE80211_HT_CAP_SM_PS_SHIFT;
528 break;
529 }
530
531 /* reserve and fill IE */
532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
534 }
535
536 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
537 struct sk_buff *skb,
538 struct ieee80211_supported_band *sband,
539 struct ieee80211_vht_cap *ap_vht_cap)
540 {
541 u8 *pos;
542 u32 cap;
543 struct ieee80211_sta_vht_cap vht_cap;
544 u32 mask, ap_bf_sts, our_bf_sts;
545
546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
547
548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
550
551 /* determine capability flags */
552 cap = vht_cap.cap;
553
554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
555 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
556 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
557 }
558
559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
560 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
562 }
563
564 /*
565 * Some APs apparently get confused if our capabilities are better
566 * than theirs, so restrict what we advertise in the assoc request.
567 */
568 if (!(ap_vht_cap->vht_cap_info &
569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
570 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
571
572 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
573
574 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
575 our_bf_sts = cap & mask;
576
577 if (ap_bf_sts < our_bf_sts) {
578 cap &= ~mask;
579 cap |= ap_bf_sts;
580 }
581
582 /* reserve and fill IE */
583 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
584 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
585 }
586
587 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
588 {
589 struct ieee80211_local *local = sdata->local;
590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
591 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
592 struct sk_buff *skb;
593 struct ieee80211_mgmt *mgmt;
594 u8 *pos, qos_info;
595 size_t offset = 0, noffset;
596 int i, count, rates_len, supp_rates_len, shift;
597 u16 capab;
598 struct ieee80211_supported_band *sband;
599 struct ieee80211_chanctx_conf *chanctx_conf;
600 struct ieee80211_channel *chan;
601 u32 rate_flags, rates = 0;
602
603 sdata_assert_lock(sdata);
604
605 rcu_read_lock();
606 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
607 if (WARN_ON(!chanctx_conf)) {
608 rcu_read_unlock();
609 return;
610 }
611 chan = chanctx_conf->def.chan;
612 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
613 rcu_read_unlock();
614 sband = local->hw.wiphy->bands[chan->band];
615 shift = ieee80211_vif_get_shift(&sdata->vif);
616
617 if (assoc_data->supp_rates_len) {
618 /*
619 * Get all rates supported by the device and the AP as
620 * some APs don't like getting a superset of their rates
621 * in the association request (e.g. D-Link DAP 1353 in
622 * b-only mode)...
623 */
624 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
625 assoc_data->supp_rates,
626 assoc_data->supp_rates_len,
627 &rates);
628 } else {
629 /*
630 * In case AP not provide any supported rates information
631 * before association, we send information element(s) with
632 * all rates that we support.
633 */
634 rates_len = 0;
635 for (i = 0; i < sband->n_bitrates; i++) {
636 if ((rate_flags & sband->bitrates[i].flags)
637 != rate_flags)
638 continue;
639 rates |= BIT(i);
640 rates_len++;
641 }
642 }
643
644 skb = alloc_skb(local->hw.extra_tx_headroom +
645 sizeof(*mgmt) + /* bit too much but doesn't matter */
646 2 + assoc_data->ssid_len + /* SSID */
647 4 + rates_len + /* (extended) rates */
648 4 + /* power capability */
649 2 + 2 * sband->n_channels + /* supported channels */
650 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
651 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
652 assoc_data->ie_len + /* extra IEs */
653 9, /* WMM */
654 GFP_KERNEL);
655 if (!skb)
656 return;
657
658 skb_reserve(skb, local->hw.extra_tx_headroom);
659
660 capab = WLAN_CAPABILITY_ESS;
661
662 if (sband->band == IEEE80211_BAND_2GHZ) {
663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
664 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
665 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
667 }
668
669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
670 capab |= WLAN_CAPABILITY_PRIVACY;
671
672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
673 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
675
676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
677 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
678
679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
680 memset(mgmt, 0, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
684
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
686 skb_put(skb, 10);
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
693 ETH_ALEN);
694 } else {
695 skb_put(skb, 4);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 }
702
703 /* SSID */
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
708
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
712 supp_rates_len = 8;
713
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
717
718 count = 0;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
722 5 * (1 << shift));
723 *pos++ = (u8) rate;
724 if (++count == 8)
725 break;
726 }
727 }
728
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
733
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
736 int rate;
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 5 * (1 << shift));
739 *pos++ = (u8) rate;
740 }
741 }
742 }
743
744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
745 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
748 *pos++ = 2;
749 *pos++ = 0; /* min tx power */
750 /* max tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
752 }
753
754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
755 /* TODO: get this in reg domain format */
756 pos = skb_put(skb, 2 * sband->n_channels + 2);
757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
758 *pos++ = 2 * sband->n_channels;
759 for (i = 0; i < sband->n_channels; i++) {
760 *pos++ = ieee80211_frequency_to_channel(
761 sband->channels[i].center_freq);
762 *pos++ = 1; /* one channel in the subband*/
763 }
764 }
765
766 /* if present, add any custom IEs that go before HT */
767 if (assoc_data->ie_len) {
768 static const u8 before_ht[] = {
769 WLAN_EID_SSID,
770 WLAN_EID_SUPP_RATES,
771 WLAN_EID_EXT_SUPP_RATES,
772 WLAN_EID_PWR_CAPABILITY,
773 WLAN_EID_SUPPORTED_CHANNELS,
774 WLAN_EID_RSN,
775 WLAN_EID_QOS_CAPA,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES,
777 WLAN_EID_MOBILITY_DOMAIN,
778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
779 };
780 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
781 before_ht, ARRAY_SIZE(before_ht),
782 offset);
783 pos = skb_put(skb, noffset - offset);
784 memcpy(pos, assoc_data->ie + offset, noffset - offset);
785 offset = noffset;
786 }
787
788 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
789 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
790 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
791
792 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
793 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
794 sband, chan, sdata->smps_mode);
795
796 /* if present, add any custom IEs that go before VHT */
797 if (assoc_data->ie_len) {
798 static const u8 before_vht[] = {
799 WLAN_EID_SSID,
800 WLAN_EID_SUPP_RATES,
801 WLAN_EID_EXT_SUPP_RATES,
802 WLAN_EID_PWR_CAPABILITY,
803 WLAN_EID_SUPPORTED_CHANNELS,
804 WLAN_EID_RSN,
805 WLAN_EID_QOS_CAPA,
806 WLAN_EID_RRM_ENABLED_CAPABILITIES,
807 WLAN_EID_MOBILITY_DOMAIN,
808 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
809 WLAN_EID_HT_CAPABILITY,
810 WLAN_EID_BSS_COEX_2040,
811 WLAN_EID_EXT_CAPABILITY,
812 WLAN_EID_QOS_TRAFFIC_CAPA,
813 WLAN_EID_TIM_BCAST_REQ,
814 WLAN_EID_INTERWORKING,
815 };
816 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
817 before_vht, ARRAY_SIZE(before_vht),
818 offset);
819 pos = skb_put(skb, noffset - offset);
820 memcpy(pos, assoc_data->ie + offset, noffset - offset);
821 offset = noffset;
822 }
823
824 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
825 ieee80211_add_vht_ie(sdata, skb, sband,
826 &assoc_data->ap_vht_cap);
827
828 /* if present, add any custom non-vendor IEs that go after HT */
829 if (assoc_data->ie_len) {
830 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
831 assoc_data->ie_len,
832 offset);
833 pos = skb_put(skb, noffset - offset);
834 memcpy(pos, assoc_data->ie + offset, noffset - offset);
835 offset = noffset;
836 }
837
838 if (assoc_data->wmm) {
839 if (assoc_data->uapsd) {
840 qos_info = ifmgd->uapsd_queues;
841 qos_info |= (ifmgd->uapsd_max_sp_len <<
842 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
843 } else {
844 qos_info = 0;
845 }
846
847 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
848 }
849
850 /* add any remaining custom (i.e. vendor specific here) IEs */
851 if (assoc_data->ie_len) {
852 noffset = assoc_data->ie_len;
853 pos = skb_put(skb, noffset - offset);
854 memcpy(pos, assoc_data->ie + offset, noffset - offset);
855 }
856
857 drv_mgd_prepare_tx(local, sdata);
858
859 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
860 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
861 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
862 IEEE80211_TX_INTFL_MLME_CONN_TX;
863 ieee80211_tx_skb(sdata, skb);
864 }
865
866 void ieee80211_send_pspoll(struct ieee80211_local *local,
867 struct ieee80211_sub_if_data *sdata)
868 {
869 struct ieee80211_pspoll *pspoll;
870 struct sk_buff *skb;
871
872 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
873 if (!skb)
874 return;
875
876 pspoll = (struct ieee80211_pspoll *) skb->data;
877 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
878
879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
880 ieee80211_tx_skb(sdata, skb);
881 }
882
883 void ieee80211_send_nullfunc(struct ieee80211_local *local,
884 struct ieee80211_sub_if_data *sdata,
885 int powersave)
886 {
887 struct sk_buff *skb;
888 struct ieee80211_hdr_3addr *nullfunc;
889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
890
891 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
892 if (!skb)
893 return;
894
895 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
896 if (powersave)
897 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
898
899 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
900 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
901
902 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
904
905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
907
908 ieee80211_tx_skb(sdata, skb);
909 }
910
911 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
912 struct ieee80211_sub_if_data *sdata)
913 {
914 struct sk_buff *skb;
915 struct ieee80211_hdr *nullfunc;
916 __le16 fc;
917
918 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
919 return;
920
921 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
922 if (!skb)
923 return;
924
925 skb_reserve(skb, local->hw.extra_tx_headroom);
926
927 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
928 memset(nullfunc, 0, 30);
929 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
930 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
931 nullfunc->frame_control = fc;
932 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
933 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
934 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
935 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
936
937 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
938 ieee80211_tx_skb(sdata, skb);
939 }
940
941 /* spectrum management related things */
942 static void ieee80211_chswitch_work(struct work_struct *work)
943 {
944 struct ieee80211_sub_if_data *sdata =
945 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
946 struct ieee80211_local *local = sdata->local;
947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
948 int ret;
949
950 if (!ieee80211_sdata_running(sdata))
951 return;
952
953 sdata_lock(sdata);
954 mutex_lock(&local->mtx);
955 mutex_lock(&local->chanctx_mtx);
956
957 if (!ifmgd->associated)
958 goto out;
959
960 if (!sdata->vif.csa_active)
961 goto out;
962
963 /*
964 * using reservation isn't immediate as it may be deferred until later
965 * with multi-vif. once reservation is complete it will re-schedule the
966 * work with no reserved_chanctx so verify chandef to check if it
967 * completed successfully
968 */
969
970 if (sdata->reserved_chanctx) {
971 /*
972 * with multi-vif csa driver may call ieee80211_csa_finish()
973 * many times while waiting for other interfaces to use their
974 * reservations
975 */
976 if (sdata->reserved_ready)
977 goto out;
978
979 ret = ieee80211_vif_use_reserved_context(sdata);
980 if (ret) {
981 sdata_info(sdata,
982 "failed to use reserved channel context, disconnecting (err=%d)\n",
983 ret);
984 ieee80211_queue_work(&sdata->local->hw,
985 &ifmgd->csa_connection_drop_work);
986 goto out;
987 }
988
989 goto out;
990 }
991
992 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
993 &sdata->csa_chandef)) {
994 sdata_info(sdata,
995 "failed to finalize channel switch, disconnecting\n");
996 ieee80211_queue_work(&sdata->local->hw,
997 &ifmgd->csa_connection_drop_work);
998 goto out;
999 }
1000
1001 /* XXX: shouldn't really modify cfg80211-owned data! */
1002 ifmgd->associated->channel = sdata->csa_chandef.chan;
1003
1004 ifmgd->csa_waiting_bcn = true;
1005
1006 ieee80211_sta_reset_beacon_monitor(sdata);
1007 ieee80211_sta_reset_conn_monitor(sdata);
1008
1009 out:
1010 mutex_unlock(&local->chanctx_mtx);
1011 mutex_unlock(&local->mtx);
1012 sdata_unlock(sdata);
1013 }
1014
1015 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1016 {
1017 struct ieee80211_local *local = sdata->local;
1018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1019 int ret;
1020
1021 sdata_assert_lock(sdata);
1022
1023 WARN_ON(!sdata->vif.csa_active);
1024
1025 if (sdata->csa_block_tx) {
1026 ieee80211_wake_vif_queues(local, sdata,
1027 IEEE80211_QUEUE_STOP_REASON_CSA);
1028 sdata->csa_block_tx = false;
1029 }
1030
1031 sdata->vif.csa_active = false;
1032 ifmgd->csa_waiting_bcn = false;
1033
1034 ret = drv_post_channel_switch(sdata);
1035 if (ret) {
1036 sdata_info(sdata,
1037 "driver post channel switch failed, disconnecting\n");
1038 ieee80211_queue_work(&local->hw,
1039 &ifmgd->csa_connection_drop_work);
1040 return;
1041 }
1042 }
1043
1044 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1045 {
1046 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1048
1049 trace_api_chswitch_done(sdata, success);
1050 if (!success) {
1051 sdata_info(sdata,
1052 "driver channel switch failed, disconnecting\n");
1053 ieee80211_queue_work(&sdata->local->hw,
1054 &ifmgd->csa_connection_drop_work);
1055 } else {
1056 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1057 }
1058 }
1059 EXPORT_SYMBOL(ieee80211_chswitch_done);
1060
1061 static void ieee80211_chswitch_timer(unsigned long data)
1062 {
1063 struct ieee80211_sub_if_data *sdata =
1064 (struct ieee80211_sub_if_data *) data;
1065
1066 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1067 }
1068
1069 static void
1070 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1071 u64 timestamp, u32 device_timestamp,
1072 struct ieee802_11_elems *elems,
1073 bool beacon)
1074 {
1075 struct ieee80211_local *local = sdata->local;
1076 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1077 struct cfg80211_bss *cbss = ifmgd->associated;
1078 struct ieee80211_chanctx_conf *conf;
1079 struct ieee80211_chanctx *chanctx;
1080 enum ieee80211_band current_band;
1081 struct ieee80211_csa_ie csa_ie;
1082 struct ieee80211_channel_switch ch_switch;
1083 int res;
1084
1085 sdata_assert_lock(sdata);
1086
1087 if (!cbss)
1088 return;
1089
1090 if (local->scanning)
1091 return;
1092
1093 /* disregard subsequent announcements if we are already processing */
1094 if (sdata->vif.csa_active)
1095 return;
1096
1097 current_band = cbss->channel->band;
1098 memset(&csa_ie, 0, sizeof(csa_ie));
1099 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1100 ifmgd->flags,
1101 ifmgd->associated->bssid, &csa_ie);
1102 if (res < 0)
1103 ieee80211_queue_work(&local->hw,
1104 &ifmgd->csa_connection_drop_work);
1105 if (res)
1106 return;
1107
1108 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1109 IEEE80211_CHAN_DISABLED)) {
1110 sdata_info(sdata,
1111 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1112 ifmgd->associated->bssid,
1113 csa_ie.chandef.chan->center_freq,
1114 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1115 csa_ie.chandef.center_freq2);
1116 ieee80211_queue_work(&local->hw,
1117 &ifmgd->csa_connection_drop_work);
1118 return;
1119 }
1120
1121 mutex_lock(&local->mtx);
1122 mutex_lock(&local->chanctx_mtx);
1123 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1124 lockdep_is_held(&local->chanctx_mtx));
1125 if (!conf) {
1126 sdata_info(sdata,
1127 "no channel context assigned to vif?, disconnecting\n");
1128 ieee80211_queue_work(&local->hw,
1129 &ifmgd->csa_connection_drop_work);
1130 mutex_unlock(&local->chanctx_mtx);
1131 mutex_unlock(&local->mtx);
1132 return;
1133 }
1134
1135 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1136
1137 if (local->use_chanctx &&
1138 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1139 sdata_info(sdata,
1140 "driver doesn't support chan-switch with channel contexts\n");
1141 ieee80211_queue_work(&local->hw,
1142 &ifmgd->csa_connection_drop_work);
1143 mutex_unlock(&local->chanctx_mtx);
1144 mutex_unlock(&local->mtx);
1145 return;
1146 }
1147
1148 ch_switch.timestamp = timestamp;
1149 ch_switch.device_timestamp = device_timestamp;
1150 ch_switch.block_tx = csa_ie.mode;
1151 ch_switch.chandef = csa_ie.chandef;
1152 ch_switch.count = csa_ie.count;
1153
1154 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1155 sdata_info(sdata,
1156 "preparing for channel switch failed, disconnecting\n");
1157 ieee80211_queue_work(&local->hw,
1158 &ifmgd->csa_connection_drop_work);
1159 mutex_unlock(&local->chanctx_mtx);
1160 mutex_unlock(&local->mtx);
1161 return;
1162 }
1163
1164 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1165 chanctx->mode, false);
1166 if (res) {
1167 sdata_info(sdata,
1168 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1169 res);
1170 ieee80211_queue_work(&local->hw,
1171 &ifmgd->csa_connection_drop_work);
1172 mutex_unlock(&local->chanctx_mtx);
1173 mutex_unlock(&local->mtx);
1174 return;
1175 }
1176 mutex_unlock(&local->chanctx_mtx);
1177
1178 sdata->vif.csa_active = true;
1179 sdata->csa_chandef = csa_ie.chandef;
1180 sdata->csa_block_tx = csa_ie.mode;
1181
1182 if (sdata->csa_block_tx)
1183 ieee80211_stop_vif_queues(local, sdata,
1184 IEEE80211_QUEUE_STOP_REASON_CSA);
1185 mutex_unlock(&local->mtx);
1186
1187 if (local->ops->channel_switch) {
1188 /* use driver's channel switch callback */
1189 drv_channel_switch(local, sdata, &ch_switch);
1190 return;
1191 }
1192
1193 /* channel switch handled in software */
1194 if (csa_ie.count <= 1)
1195 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1196 else
1197 mod_timer(&ifmgd->chswitch_timer,
1198 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1199 }
1200
1201 static bool
1202 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1203 struct ieee80211_channel *channel,
1204 const u8 *country_ie, u8 country_ie_len,
1205 const u8 *pwr_constr_elem,
1206 int *chan_pwr, int *pwr_reduction)
1207 {
1208 struct ieee80211_country_ie_triplet *triplet;
1209 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1210 int i, chan_increment;
1211 bool have_chan_pwr = false;
1212
1213 /* Invalid IE */
1214 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1215 return false;
1216
1217 triplet = (void *)(country_ie + 3);
1218 country_ie_len -= 3;
1219
1220 switch (channel->band) {
1221 default:
1222 WARN_ON_ONCE(1);
1223 /* fall through */
1224 case IEEE80211_BAND_2GHZ:
1225 case IEEE80211_BAND_60GHZ:
1226 chan_increment = 1;
1227 break;
1228 case IEEE80211_BAND_5GHZ:
1229 chan_increment = 4;
1230 break;
1231 }
1232
1233 /* find channel */
1234 while (country_ie_len >= 3) {
1235 u8 first_channel = triplet->chans.first_channel;
1236
1237 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1238 goto next;
1239
1240 for (i = 0; i < triplet->chans.num_channels; i++) {
1241 if (first_channel + i * chan_increment == chan) {
1242 have_chan_pwr = true;
1243 *chan_pwr = triplet->chans.max_power;
1244 break;
1245 }
1246 }
1247 if (have_chan_pwr)
1248 break;
1249
1250 next:
1251 triplet++;
1252 country_ie_len -= 3;
1253 }
1254
1255 if (have_chan_pwr)
1256 *pwr_reduction = *pwr_constr_elem;
1257 return have_chan_pwr;
1258 }
1259
1260 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1261 struct ieee80211_channel *channel,
1262 const u8 *cisco_dtpc_ie,
1263 int *pwr_level)
1264 {
1265 /* From practical testing, the first data byte of the DTPC element
1266 * seems to contain the requested dBm level, and the CLI on Cisco
1267 * APs clearly state the range is -127 to 127 dBm, which indicates
1268 * a signed byte, although it seemingly never actually goes negative.
1269 * The other byte seems to always be zero.
1270 */
1271 *pwr_level = (__s8)cisco_dtpc_ie[4];
1272 }
1273
1274 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1275 struct ieee80211_channel *channel,
1276 struct ieee80211_mgmt *mgmt,
1277 const u8 *country_ie, u8 country_ie_len,
1278 const u8 *pwr_constr_ie,
1279 const u8 *cisco_dtpc_ie)
1280 {
1281 bool has_80211h_pwr = false, has_cisco_pwr = false;
1282 int chan_pwr = 0, pwr_reduction_80211h = 0;
1283 int pwr_level_cisco, pwr_level_80211h;
1284 int new_ap_level;
1285
1286 if (country_ie && pwr_constr_ie &&
1287 mgmt->u.probe_resp.capab_info &
1288 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1289 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1290 sdata, channel, country_ie, country_ie_len,
1291 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1292 pwr_level_80211h =
1293 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1294 }
1295
1296 if (cisco_dtpc_ie) {
1297 ieee80211_find_cisco_dtpc(
1298 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1299 has_cisco_pwr = true;
1300 }
1301
1302 if (!has_80211h_pwr && !has_cisco_pwr)
1303 return 0;
1304
1305 /* If we have both 802.11h and Cisco DTPC, apply both limits
1306 * by picking the smallest of the two power levels advertised.
1307 */
1308 if (has_80211h_pwr &&
1309 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1310 sdata_info(sdata,
1311 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1312 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1313 sdata->u.mgd.bssid);
1314 new_ap_level = pwr_level_80211h;
1315 } else { /* has_cisco_pwr is always true here. */
1316 sdata_info(sdata,
1317 "Limiting TX power to %d dBm as advertised by %pM\n",
1318 pwr_level_cisco, sdata->u.mgd.bssid);
1319 new_ap_level = pwr_level_cisco;
1320 }
1321
1322 if (sdata->ap_power_level == new_ap_level)
1323 return 0;
1324
1325 sdata->ap_power_level = new_ap_level;
1326 if (__ieee80211_recalc_txpower(sdata))
1327 return BSS_CHANGED_TXPOWER;
1328 return 0;
1329 }
1330
1331 /* powersave */
1332 static void ieee80211_enable_ps(struct ieee80211_local *local,
1333 struct ieee80211_sub_if_data *sdata)
1334 {
1335 struct ieee80211_conf *conf = &local->hw.conf;
1336
1337 /*
1338 * If we are scanning right now then the parameters will
1339 * take effect when scan finishes.
1340 */
1341 if (local->scanning)
1342 return;
1343
1344 if (conf->dynamic_ps_timeout > 0 &&
1345 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1346 mod_timer(&local->dynamic_ps_timer, jiffies +
1347 msecs_to_jiffies(conf->dynamic_ps_timeout));
1348 } else {
1349 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1350 ieee80211_send_nullfunc(local, sdata, 1);
1351
1352 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1353 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1354 return;
1355
1356 conf->flags |= IEEE80211_CONF_PS;
1357 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1358 }
1359 }
1360
1361 static void ieee80211_change_ps(struct ieee80211_local *local)
1362 {
1363 struct ieee80211_conf *conf = &local->hw.conf;
1364
1365 if (local->ps_sdata) {
1366 ieee80211_enable_ps(local, local->ps_sdata);
1367 } else if (conf->flags & IEEE80211_CONF_PS) {
1368 conf->flags &= ~IEEE80211_CONF_PS;
1369 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1370 del_timer_sync(&local->dynamic_ps_timer);
1371 cancel_work_sync(&local->dynamic_ps_enable_work);
1372 }
1373 }
1374
1375 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1376 {
1377 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1378 struct sta_info *sta = NULL;
1379 bool authorized = false;
1380
1381 if (!mgd->powersave)
1382 return false;
1383
1384 if (mgd->broken_ap)
1385 return false;
1386
1387 if (!mgd->associated)
1388 return false;
1389
1390 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1391 return false;
1392
1393 if (!mgd->have_beacon)
1394 return false;
1395
1396 rcu_read_lock();
1397 sta = sta_info_get(sdata, mgd->bssid);
1398 if (sta)
1399 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1400 rcu_read_unlock();
1401
1402 return authorized;
1403 }
1404
1405 /* need to hold RTNL or interface lock */
1406 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1407 {
1408 struct ieee80211_sub_if_data *sdata, *found = NULL;
1409 int count = 0;
1410 int timeout;
1411
1412 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1413 local->ps_sdata = NULL;
1414 return;
1415 }
1416
1417 list_for_each_entry(sdata, &local->interfaces, list) {
1418 if (!ieee80211_sdata_running(sdata))
1419 continue;
1420 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1421 /* If an AP vif is found, then disable PS
1422 * by setting the count to zero thereby setting
1423 * ps_sdata to NULL.
1424 */
1425 count = 0;
1426 break;
1427 }
1428 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1429 continue;
1430 found = sdata;
1431 count++;
1432 }
1433
1434 if (count == 1 && ieee80211_powersave_allowed(found)) {
1435 s32 beaconint_us;
1436
1437 if (latency < 0)
1438 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1439
1440 beaconint_us = ieee80211_tu_to_usec(
1441 found->vif.bss_conf.beacon_int);
1442
1443 timeout = local->dynamic_ps_forced_timeout;
1444 if (timeout < 0) {
1445 /*
1446 * Go to full PSM if the user configures a very low
1447 * latency requirement.
1448 * The 2000 second value is there for compatibility
1449 * until the PM_QOS_NETWORK_LATENCY is configured
1450 * with real values.
1451 */
1452 if (latency > (1900 * USEC_PER_MSEC) &&
1453 latency != (2000 * USEC_PER_SEC))
1454 timeout = 0;
1455 else
1456 timeout = 100;
1457 }
1458 local->hw.conf.dynamic_ps_timeout = timeout;
1459
1460 if (beaconint_us > latency) {
1461 local->ps_sdata = NULL;
1462 } else {
1463 int maxslp = 1;
1464 u8 dtimper = found->u.mgd.dtim_period;
1465
1466 /* If the TIM IE is invalid, pretend the value is 1 */
1467 if (!dtimper)
1468 dtimper = 1;
1469 else if (dtimper > 1)
1470 maxslp = min_t(int, dtimper,
1471 latency / beaconint_us);
1472
1473 local->hw.conf.max_sleep_period = maxslp;
1474 local->hw.conf.ps_dtim_period = dtimper;
1475 local->ps_sdata = found;
1476 }
1477 } else {
1478 local->ps_sdata = NULL;
1479 }
1480
1481 ieee80211_change_ps(local);
1482 }
1483
1484 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1485 {
1486 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1487
1488 if (sdata->vif.bss_conf.ps != ps_allowed) {
1489 sdata->vif.bss_conf.ps = ps_allowed;
1490 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1491 }
1492 }
1493
1494 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1495 {
1496 struct ieee80211_local *local =
1497 container_of(work, struct ieee80211_local,
1498 dynamic_ps_disable_work);
1499
1500 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1501 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1502 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1503 }
1504
1505 ieee80211_wake_queues_by_reason(&local->hw,
1506 IEEE80211_MAX_QUEUE_MAP,
1507 IEEE80211_QUEUE_STOP_REASON_PS,
1508 false);
1509 }
1510
1511 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1512 {
1513 struct ieee80211_local *local =
1514 container_of(work, struct ieee80211_local,
1515 dynamic_ps_enable_work);
1516 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1517 struct ieee80211_if_managed *ifmgd;
1518 unsigned long flags;
1519 int q;
1520
1521 /* can only happen when PS was just disabled anyway */
1522 if (!sdata)
1523 return;
1524
1525 ifmgd = &sdata->u.mgd;
1526
1527 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1528 return;
1529
1530 if (local->hw.conf.dynamic_ps_timeout > 0) {
1531 /* don't enter PS if TX frames are pending */
1532 if (drv_tx_frames_pending(local)) {
1533 mod_timer(&local->dynamic_ps_timer, jiffies +
1534 msecs_to_jiffies(
1535 local->hw.conf.dynamic_ps_timeout));
1536 return;
1537 }
1538
1539 /*
1540 * transmission can be stopped by others which leads to
1541 * dynamic_ps_timer expiry. Postpone the ps timer if it
1542 * is not the actual idle state.
1543 */
1544 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1545 for (q = 0; q < local->hw.queues; q++) {
1546 if (local->queue_stop_reasons[q]) {
1547 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1548 flags);
1549 mod_timer(&local->dynamic_ps_timer, jiffies +
1550 msecs_to_jiffies(
1551 local->hw.conf.dynamic_ps_timeout));
1552 return;
1553 }
1554 }
1555 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1556 }
1557
1558 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1559 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1560 if (drv_tx_frames_pending(local)) {
1561 mod_timer(&local->dynamic_ps_timer, jiffies +
1562 msecs_to_jiffies(
1563 local->hw.conf.dynamic_ps_timeout));
1564 } else {
1565 ieee80211_send_nullfunc(local, sdata, 1);
1566 /* Flush to get the tx status of nullfunc frame */
1567 ieee80211_flush_queues(local, sdata);
1568 }
1569 }
1570
1571 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1572 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1573 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1574 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1575 local->hw.conf.flags |= IEEE80211_CONF_PS;
1576 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1577 }
1578 }
1579
1580 void ieee80211_dynamic_ps_timer(unsigned long data)
1581 {
1582 struct ieee80211_local *local = (void *) data;
1583
1584 if (local->quiescing || local->suspended)
1585 return;
1586
1587 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1588 }
1589
1590 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1591 {
1592 struct delayed_work *delayed_work =
1593 container_of(work, struct delayed_work, work);
1594 struct ieee80211_sub_if_data *sdata =
1595 container_of(delayed_work, struct ieee80211_sub_if_data,
1596 dfs_cac_timer_work);
1597 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1598
1599 mutex_lock(&sdata->local->mtx);
1600 if (sdata->wdev.cac_started) {
1601 ieee80211_vif_release_channel(sdata);
1602 cfg80211_cac_event(sdata->dev, &chandef,
1603 NL80211_RADAR_CAC_FINISHED,
1604 GFP_KERNEL);
1605 }
1606 mutex_unlock(&sdata->local->mtx);
1607 }
1608
1609 static bool
1610 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1611 {
1612 struct ieee80211_local *local = sdata->local;
1613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1614 bool ret;
1615 int ac;
1616
1617 if (local->hw.queues < IEEE80211_NUM_ACS)
1618 return false;
1619
1620 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1621 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1622 int non_acm_ac;
1623 unsigned long now = jiffies;
1624
1625 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1626 tx_tspec->admitted_time &&
1627 time_after(now, tx_tspec->time_slice_start + HZ)) {
1628 tx_tspec->consumed_tx_time = 0;
1629 tx_tspec->time_slice_start = now;
1630
1631 if (tx_tspec->downgraded)
1632 tx_tspec->action =
1633 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1634 }
1635
1636 switch (tx_tspec->action) {
1637 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1638 /* take the original parameters */
1639 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1640 sdata_err(sdata,
1641 "failed to set TX queue parameters for queue %d\n",
1642 ac);
1643 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1644 tx_tspec->downgraded = false;
1645 ret = true;
1646 break;
1647 case TX_TSPEC_ACTION_DOWNGRADE:
1648 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1649 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1650 ret = true;
1651 break;
1652 }
1653 /* downgrade next lower non-ACM AC */
1654 for (non_acm_ac = ac + 1;
1655 non_acm_ac < IEEE80211_NUM_ACS;
1656 non_acm_ac++)
1657 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1658 break;
1659 /* The loop will result in using BK even if it requires
1660 * admission control, such configuration makes no sense
1661 * and we have to transmit somehow - the AC selection
1662 * does the same thing.
1663 */
1664 if (drv_conf_tx(local, sdata, ac,
1665 &sdata->tx_conf[non_acm_ac]))
1666 sdata_err(sdata,
1667 "failed to set TX queue parameters for queue %d\n",
1668 ac);
1669 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1670 ret = true;
1671 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1672 tx_tspec->time_slice_start + HZ - now + 1);
1673 break;
1674 case TX_TSPEC_ACTION_NONE:
1675 /* nothing now */
1676 break;
1677 }
1678 }
1679
1680 return ret;
1681 }
1682
1683 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1684 {
1685 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1686 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1687 }
1688
1689 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1690 {
1691 struct ieee80211_sub_if_data *sdata;
1692
1693 sdata = container_of(work, struct ieee80211_sub_if_data,
1694 u.mgd.tx_tspec_wk.work);
1695 ieee80211_sta_handle_tspec_ac_params(sdata);
1696 }
1697
1698 /* MLME */
1699 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1700 struct ieee80211_sub_if_data *sdata,
1701 const u8 *wmm_param, size_t wmm_param_len)
1702 {
1703 struct ieee80211_tx_queue_params params;
1704 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1705 size_t left;
1706 int count;
1707 const u8 *pos;
1708 u8 uapsd_queues = 0;
1709
1710 if (!local->ops->conf_tx)
1711 return false;
1712
1713 if (local->hw.queues < IEEE80211_NUM_ACS)
1714 return false;
1715
1716 if (!wmm_param)
1717 return false;
1718
1719 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1720 return false;
1721
1722 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1723 uapsd_queues = ifmgd->uapsd_queues;
1724
1725 count = wmm_param[6] & 0x0f;
1726 if (count == ifmgd->wmm_last_param_set)
1727 return false;
1728 ifmgd->wmm_last_param_set = count;
1729
1730 pos = wmm_param + 8;
1731 left = wmm_param_len - 8;
1732
1733 memset(&params, 0, sizeof(params));
1734
1735 sdata->wmm_acm = 0;
1736 for (; left >= 4; left -= 4, pos += 4) {
1737 int aci = (pos[0] >> 5) & 0x03;
1738 int acm = (pos[0] >> 4) & 0x01;
1739 bool uapsd = false;
1740 int queue;
1741
1742 switch (aci) {
1743 case 1: /* AC_BK */
1744 queue = 3;
1745 if (acm)
1746 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1747 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1748 uapsd = true;
1749 break;
1750 case 2: /* AC_VI */
1751 queue = 1;
1752 if (acm)
1753 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1754 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1755 uapsd = true;
1756 break;
1757 case 3: /* AC_VO */
1758 queue = 0;
1759 if (acm)
1760 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1761 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1762 uapsd = true;
1763 break;
1764 case 0: /* AC_BE */
1765 default:
1766 queue = 2;
1767 if (acm)
1768 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1769 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1770 uapsd = true;
1771 break;
1772 }
1773
1774 params.aifs = pos[0] & 0x0f;
1775 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1776 params.cw_min = ecw2cw(pos[1] & 0x0f);
1777 params.txop = get_unaligned_le16(pos + 2);
1778 params.acm = acm;
1779 params.uapsd = uapsd;
1780
1781 mlme_dbg(sdata,
1782 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1783 queue, aci, acm,
1784 params.aifs, params.cw_min, params.cw_max,
1785 params.txop, params.uapsd,
1786 ifmgd->tx_tspec[queue].downgraded);
1787 sdata->tx_conf[queue] = params;
1788 if (!ifmgd->tx_tspec[queue].downgraded &&
1789 drv_conf_tx(local, sdata, queue, &params))
1790 sdata_err(sdata,
1791 "failed to set TX queue parameters for queue %d\n",
1792 queue);
1793 }
1794
1795 /* enable WMM or activate new settings */
1796 sdata->vif.bss_conf.qos = true;
1797 return true;
1798 }
1799
1800 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1801 {
1802 lockdep_assert_held(&sdata->local->mtx);
1803
1804 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1805 ieee80211_run_deferred_scan(sdata->local);
1806 }
1807
1808 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1809 {
1810 mutex_lock(&sdata->local->mtx);
1811 __ieee80211_stop_poll(sdata);
1812 mutex_unlock(&sdata->local->mtx);
1813 }
1814
1815 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1816 u16 capab, bool erp_valid, u8 erp)
1817 {
1818 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1819 u32 changed = 0;
1820 bool use_protection;
1821 bool use_short_preamble;
1822 bool use_short_slot;
1823
1824 if (erp_valid) {
1825 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1826 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1827 } else {
1828 use_protection = false;
1829 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1830 }
1831
1832 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1833 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1834 use_short_slot = true;
1835
1836 if (use_protection != bss_conf->use_cts_prot) {
1837 bss_conf->use_cts_prot = use_protection;
1838 changed |= BSS_CHANGED_ERP_CTS_PROT;
1839 }
1840
1841 if (use_short_preamble != bss_conf->use_short_preamble) {
1842 bss_conf->use_short_preamble = use_short_preamble;
1843 changed |= BSS_CHANGED_ERP_PREAMBLE;
1844 }
1845
1846 if (use_short_slot != bss_conf->use_short_slot) {
1847 bss_conf->use_short_slot = use_short_slot;
1848 changed |= BSS_CHANGED_ERP_SLOT;
1849 }
1850
1851 return changed;
1852 }
1853
1854 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1855 struct cfg80211_bss *cbss,
1856 u32 bss_info_changed)
1857 {
1858 struct ieee80211_bss *bss = (void *)cbss->priv;
1859 struct ieee80211_local *local = sdata->local;
1860 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1861
1862 bss_info_changed |= BSS_CHANGED_ASSOC;
1863 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1864 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1865
1866 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1867 beacon_loss_count * bss_conf->beacon_int));
1868
1869 sdata->u.mgd.associated = cbss;
1870 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1871
1872 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1873
1874 if (sdata->vif.p2p) {
1875 const struct cfg80211_bss_ies *ies;
1876
1877 rcu_read_lock();
1878 ies = rcu_dereference(cbss->ies);
1879 if (ies) {
1880 int ret;
1881
1882 ret = cfg80211_get_p2p_attr(
1883 ies->data, ies->len,
1884 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1885 (u8 *) &bss_conf->p2p_noa_attr,
1886 sizeof(bss_conf->p2p_noa_attr));
1887 if (ret >= 2) {
1888 sdata->u.mgd.p2p_noa_index =
1889 bss_conf->p2p_noa_attr.index;
1890 bss_info_changed |= BSS_CHANGED_P2P_PS;
1891 }
1892 }
1893 rcu_read_unlock();
1894 }
1895
1896 /* just to be sure */
1897 ieee80211_stop_poll(sdata);
1898
1899 ieee80211_led_assoc(local, 1);
1900
1901 if (sdata->u.mgd.have_beacon) {
1902 /*
1903 * If the AP is buggy we may get here with no DTIM period
1904 * known, so assume it's 1 which is the only safe assumption
1905 * in that case, although if the TIM IE is broken powersave
1906 * probably just won't work at all.
1907 */
1908 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1909 bss_conf->beacon_rate = bss->beacon_rate;
1910 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1911 } else {
1912 bss_conf->beacon_rate = NULL;
1913 bss_conf->dtim_period = 0;
1914 }
1915
1916 bss_conf->assoc = 1;
1917
1918 /* Tell the driver to monitor connection quality (if supported) */
1919 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1920 bss_conf->cqm_rssi_thold)
1921 bss_info_changed |= BSS_CHANGED_CQM;
1922
1923 /* Enable ARP filtering */
1924 if (bss_conf->arp_addr_cnt)
1925 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1926
1927 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1928
1929 mutex_lock(&local->iflist_mtx);
1930 ieee80211_recalc_ps(local, -1);
1931 mutex_unlock(&local->iflist_mtx);
1932
1933 ieee80211_recalc_smps(sdata);
1934 ieee80211_recalc_ps_vif(sdata);
1935
1936 netif_carrier_on(sdata->dev);
1937 }
1938
1939 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1940 u16 stype, u16 reason, bool tx,
1941 u8 *frame_buf)
1942 {
1943 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1944 struct ieee80211_local *local = sdata->local;
1945 u32 changed = 0;
1946
1947 sdata_assert_lock(sdata);
1948
1949 if (WARN_ON_ONCE(tx && !frame_buf))
1950 return;
1951
1952 if (WARN_ON(!ifmgd->associated))
1953 return;
1954
1955 ieee80211_stop_poll(sdata);
1956
1957 ifmgd->associated = NULL;
1958 netif_carrier_off(sdata->dev);
1959
1960 /*
1961 * if we want to get out of ps before disassoc (why?) we have
1962 * to do it before sending disassoc, as otherwise the null-packet
1963 * won't be valid.
1964 */
1965 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1966 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1967 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1968 }
1969 local->ps_sdata = NULL;
1970
1971 /* disable per-vif ps */
1972 ieee80211_recalc_ps_vif(sdata);
1973
1974 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1975 if (tx)
1976 ieee80211_flush_queues(local, sdata);
1977
1978 /* deauthenticate/disassociate now */
1979 if (tx || frame_buf)
1980 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1981 reason, tx, frame_buf);
1982
1983 /* flush out frame */
1984 if (tx)
1985 ieee80211_flush_queues(local, sdata);
1986
1987 /* clear bssid only after building the needed mgmt frames */
1988 memset(ifmgd->bssid, 0, ETH_ALEN);
1989
1990 /* remove AP and TDLS peers */
1991 sta_info_flush(sdata);
1992
1993 /* finally reset all BSS / config parameters */
1994 changed |= ieee80211_reset_erp_info(sdata);
1995
1996 ieee80211_led_assoc(local, 0);
1997 changed |= BSS_CHANGED_ASSOC;
1998 sdata->vif.bss_conf.assoc = false;
1999
2000 ifmgd->p2p_noa_index = -1;
2001 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2002 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2003
2004 /* on the next assoc, re-program HT/VHT parameters */
2005 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2006 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2007 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2008 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2009
2010 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2011
2012 del_timer_sync(&local->dynamic_ps_timer);
2013 cancel_work_sync(&local->dynamic_ps_enable_work);
2014
2015 /* Disable ARP filtering */
2016 if (sdata->vif.bss_conf.arp_addr_cnt)
2017 changed |= BSS_CHANGED_ARP_FILTER;
2018
2019 sdata->vif.bss_conf.qos = false;
2020 changed |= BSS_CHANGED_QOS;
2021
2022 /* The BSSID (not really interesting) and HT changed */
2023 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2024 ieee80211_bss_info_change_notify(sdata, changed);
2025
2026 /* disassociated - set to defaults now */
2027 ieee80211_set_wmm_default(sdata, false);
2028
2029 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2030 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2031 del_timer_sync(&sdata->u.mgd.timer);
2032 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2033
2034 sdata->vif.bss_conf.dtim_period = 0;
2035 sdata->vif.bss_conf.beacon_rate = NULL;
2036
2037 ifmgd->have_beacon = false;
2038
2039 ifmgd->flags = 0;
2040 mutex_lock(&local->mtx);
2041 ieee80211_vif_release_channel(sdata);
2042
2043 sdata->vif.csa_active = false;
2044 ifmgd->csa_waiting_bcn = false;
2045 if (sdata->csa_block_tx) {
2046 ieee80211_wake_vif_queues(local, sdata,
2047 IEEE80211_QUEUE_STOP_REASON_CSA);
2048 sdata->csa_block_tx = false;
2049 }
2050 mutex_unlock(&local->mtx);
2051
2052 /* existing TX TSPEC sessions no longer exist */
2053 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2054 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2055
2056 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2057 }
2058
2059 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2060 struct ieee80211_hdr *hdr)
2061 {
2062 /*
2063 * We can postpone the mgd.timer whenever receiving unicast frames
2064 * from AP because we know that the connection is working both ways
2065 * at that time. But multicast frames (and hence also beacons) must
2066 * be ignored here, because we need to trigger the timer during
2067 * data idle periods for sending the periodic probe request to the
2068 * AP we're connected to.
2069 */
2070 if (is_multicast_ether_addr(hdr->addr1))
2071 return;
2072
2073 ieee80211_sta_reset_conn_monitor(sdata);
2074 }
2075
2076 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2077 {
2078 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2079 struct ieee80211_local *local = sdata->local;
2080
2081 mutex_lock(&local->mtx);
2082 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2083 goto out;
2084
2085 __ieee80211_stop_poll(sdata);
2086
2087 mutex_lock(&local->iflist_mtx);
2088 ieee80211_recalc_ps(local, -1);
2089 mutex_unlock(&local->iflist_mtx);
2090
2091 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2092 goto out;
2093
2094 /*
2095 * We've received a probe response, but are not sure whether
2096 * we have or will be receiving any beacons or data, so let's
2097 * schedule the timers again, just in case.
2098 */
2099 ieee80211_sta_reset_beacon_monitor(sdata);
2100
2101 mod_timer(&ifmgd->conn_mon_timer,
2102 round_jiffies_up(jiffies +
2103 IEEE80211_CONNECTION_IDLE_TIME));
2104 out:
2105 mutex_unlock(&local->mtx);
2106 }
2107
2108 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2109 struct ieee80211_hdr *hdr,
2110 u16 tx_time)
2111 {
2112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2113 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2114 int ac = ieee80211_ac_from_tid(tid);
2115 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2116 unsigned long now = jiffies;
2117
2118 if (likely(!tx_tspec->admitted_time))
2119 return;
2120
2121 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2122 tx_tspec->consumed_tx_time = 0;
2123 tx_tspec->time_slice_start = now;
2124
2125 if (tx_tspec->downgraded) {
2126 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2127 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2128 }
2129 }
2130
2131 if (tx_tspec->downgraded)
2132 return;
2133
2134 tx_tspec->consumed_tx_time += tx_time;
2135
2136 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2137 tx_tspec->downgraded = true;
2138 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2139 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2140 }
2141 }
2142
2143 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2144 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2145 {
2146 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2147
2148 if (!ieee80211_is_data(hdr->frame_control))
2149 return;
2150
2151 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2152 sdata->u.mgd.probe_send_count > 0) {
2153 if (ack)
2154 ieee80211_sta_reset_conn_monitor(sdata);
2155 else
2156 sdata->u.mgd.nullfunc_failed = true;
2157 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2158 return;
2159 }
2160
2161 if (ack)
2162 ieee80211_sta_reset_conn_monitor(sdata);
2163 }
2164
2165 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2166 {
2167 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2168 const u8 *ssid;
2169 u8 *dst = ifmgd->associated->bssid;
2170 u8 unicast_limit = max(1, max_probe_tries - 3);
2171
2172 /*
2173 * Try sending broadcast probe requests for the last three
2174 * probe requests after the first ones failed since some
2175 * buggy APs only support broadcast probe requests.
2176 */
2177 if (ifmgd->probe_send_count >= unicast_limit)
2178 dst = NULL;
2179
2180 /*
2181 * When the hardware reports an accurate Tx ACK status, it's
2182 * better to send a nullfunc frame instead of a probe request,
2183 * as it will kick us off the AP quickly if we aren't associated
2184 * anymore. The timeout will be reset if the frame is ACKed by
2185 * the AP.
2186 */
2187 ifmgd->probe_send_count++;
2188
2189 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2190 ifmgd->nullfunc_failed = false;
2191 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2192 } else {
2193 int ssid_len;
2194
2195 rcu_read_lock();
2196 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2197 if (WARN_ON_ONCE(ssid == NULL))
2198 ssid_len = 0;
2199 else
2200 ssid_len = ssid[1];
2201
2202 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2203 0, (u32) -1, true, 0,
2204 ifmgd->associated->channel, false);
2205 rcu_read_unlock();
2206 }
2207
2208 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2209 run_again(sdata, ifmgd->probe_timeout);
2210 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2211 ieee80211_flush_queues(sdata->local, sdata);
2212 }
2213
2214 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2215 bool beacon)
2216 {
2217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2218 bool already = false;
2219
2220 if (!ieee80211_sdata_running(sdata))
2221 return;
2222
2223 sdata_lock(sdata);
2224
2225 if (!ifmgd->associated)
2226 goto out;
2227
2228 mutex_lock(&sdata->local->mtx);
2229
2230 if (sdata->local->tmp_channel || sdata->local->scanning) {
2231 mutex_unlock(&sdata->local->mtx);
2232 goto out;
2233 }
2234
2235 if (beacon) {
2236 mlme_dbg_ratelimited(sdata,
2237 "detected beacon loss from AP (missed %d beacons) - probing\n",
2238 beacon_loss_count);
2239
2240 ieee80211_cqm_rssi_notify(&sdata->vif,
2241 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2242 GFP_KERNEL);
2243 }
2244
2245 /*
2246 * The driver/our work has already reported this event or the
2247 * connection monitoring has kicked in and we have already sent
2248 * a probe request. Or maybe the AP died and the driver keeps
2249 * reporting until we disassociate...
2250 *
2251 * In either case we have to ignore the current call to this
2252 * function (except for setting the correct probe reason bit)
2253 * because otherwise we would reset the timer every time and
2254 * never check whether we received a probe response!
2255 */
2256 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2257 already = true;
2258
2259 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2260
2261 mutex_unlock(&sdata->local->mtx);
2262
2263 if (already)
2264 goto out;
2265
2266 mutex_lock(&sdata->local->iflist_mtx);
2267 ieee80211_recalc_ps(sdata->local, -1);
2268 mutex_unlock(&sdata->local->iflist_mtx);
2269
2270 ifmgd->probe_send_count = 0;
2271 ieee80211_mgd_probe_ap_send(sdata);
2272 out:
2273 sdata_unlock(sdata);
2274 }
2275
2276 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2277 struct ieee80211_vif *vif)
2278 {
2279 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2281 struct cfg80211_bss *cbss;
2282 struct sk_buff *skb;
2283 const u8 *ssid;
2284 int ssid_len;
2285
2286 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2287 return NULL;
2288
2289 sdata_assert_lock(sdata);
2290
2291 if (ifmgd->associated)
2292 cbss = ifmgd->associated;
2293 else if (ifmgd->auth_data)
2294 cbss = ifmgd->auth_data->bss;
2295 else if (ifmgd->assoc_data)
2296 cbss = ifmgd->assoc_data->bss;
2297 else
2298 return NULL;
2299
2300 rcu_read_lock();
2301 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2302 if (WARN_ON_ONCE(ssid == NULL))
2303 ssid_len = 0;
2304 else
2305 ssid_len = ssid[1];
2306
2307 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2308 (u32) -1, cbss->channel,
2309 ssid + 2, ssid_len,
2310 NULL, 0, true);
2311 rcu_read_unlock();
2312
2313 return skb;
2314 }
2315 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2316
2317 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2318 {
2319 struct ieee80211_local *local = sdata->local;
2320 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2321 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2322
2323 sdata_lock(sdata);
2324 if (!ifmgd->associated) {
2325 sdata_unlock(sdata);
2326 return;
2327 }
2328
2329 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2330 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2331 true, frame_buf);
2332 mutex_lock(&local->mtx);
2333 sdata->vif.csa_active = false;
2334 ifmgd->csa_waiting_bcn = false;
2335 if (sdata->csa_block_tx) {
2336 ieee80211_wake_vif_queues(local, sdata,
2337 IEEE80211_QUEUE_STOP_REASON_CSA);
2338 sdata->csa_block_tx = false;
2339 }
2340 mutex_unlock(&local->mtx);
2341
2342 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2343 IEEE80211_DEAUTH_FRAME_LEN);
2344 sdata_unlock(sdata);
2345 }
2346
2347 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2348 {
2349 struct ieee80211_sub_if_data *sdata =
2350 container_of(work, struct ieee80211_sub_if_data,
2351 u.mgd.beacon_connection_loss_work);
2352 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2353 struct sta_info *sta;
2354
2355 if (ifmgd->associated) {
2356 rcu_read_lock();
2357 sta = sta_info_get(sdata, ifmgd->bssid);
2358 if (sta)
2359 sta->beacon_loss_count++;
2360 rcu_read_unlock();
2361 }
2362
2363 if (ifmgd->connection_loss) {
2364 sdata_info(sdata, "Connection to AP %pM lost\n",
2365 ifmgd->bssid);
2366 __ieee80211_disconnect(sdata);
2367 } else {
2368 ieee80211_mgd_probe_ap(sdata, true);
2369 }
2370 }
2371
2372 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2373 {
2374 struct ieee80211_sub_if_data *sdata =
2375 container_of(work, struct ieee80211_sub_if_data,
2376 u.mgd.csa_connection_drop_work);
2377
2378 __ieee80211_disconnect(sdata);
2379 }
2380
2381 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2382 {
2383 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2384 struct ieee80211_hw *hw = &sdata->local->hw;
2385
2386 trace_api_beacon_loss(sdata);
2387
2388 sdata->u.mgd.connection_loss = false;
2389 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2390 }
2391 EXPORT_SYMBOL(ieee80211_beacon_loss);
2392
2393 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2394 {
2395 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2396 struct ieee80211_hw *hw = &sdata->local->hw;
2397
2398 trace_api_connection_loss(sdata);
2399
2400 sdata->u.mgd.connection_loss = true;
2401 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2402 }
2403 EXPORT_SYMBOL(ieee80211_connection_loss);
2404
2405
2406 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2407 bool assoc)
2408 {
2409 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2410
2411 sdata_assert_lock(sdata);
2412
2413 if (!assoc) {
2414 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2415
2416 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2417 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2418 sdata->u.mgd.flags = 0;
2419 mutex_lock(&sdata->local->mtx);
2420 ieee80211_vif_release_channel(sdata);
2421 mutex_unlock(&sdata->local->mtx);
2422 }
2423
2424 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2425 kfree(auth_data);
2426 sdata->u.mgd.auth_data = NULL;
2427 }
2428
2429 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2430 struct ieee80211_mgmt *mgmt, size_t len)
2431 {
2432 struct ieee80211_local *local = sdata->local;
2433 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2434 u8 *pos;
2435 struct ieee802_11_elems elems;
2436 u32 tx_flags = 0;
2437
2438 pos = mgmt->u.auth.variable;
2439 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2440 if (!elems.challenge)
2441 return;
2442 auth_data->expected_transaction = 4;
2443 drv_mgd_prepare_tx(sdata->local, sdata);
2444 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2445 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2446 IEEE80211_TX_INTFL_MLME_CONN_TX;
2447 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2448 elems.challenge - 2, elems.challenge_len + 2,
2449 auth_data->bss->bssid, auth_data->bss->bssid,
2450 auth_data->key, auth_data->key_len,
2451 auth_data->key_idx, tx_flags);
2452 }
2453
2454 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2455 struct ieee80211_mgmt *mgmt, size_t len)
2456 {
2457 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2458 u8 bssid[ETH_ALEN];
2459 u16 auth_alg, auth_transaction, status_code;
2460 struct sta_info *sta;
2461
2462 sdata_assert_lock(sdata);
2463
2464 if (len < 24 + 6)
2465 return;
2466
2467 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2468 return;
2469
2470 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2471
2472 if (!ether_addr_equal(bssid, mgmt->bssid))
2473 return;
2474
2475 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2476 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2477 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2478
2479 if (auth_alg != ifmgd->auth_data->algorithm ||
2480 auth_transaction != ifmgd->auth_data->expected_transaction) {
2481 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2482 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2483 auth_transaction,
2484 ifmgd->auth_data->expected_transaction);
2485 return;
2486 }
2487
2488 if (status_code != WLAN_STATUS_SUCCESS) {
2489 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2490 mgmt->sa, status_code);
2491 ieee80211_destroy_auth_data(sdata, false);
2492 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2493 return;
2494 }
2495
2496 switch (ifmgd->auth_data->algorithm) {
2497 case WLAN_AUTH_OPEN:
2498 case WLAN_AUTH_LEAP:
2499 case WLAN_AUTH_FT:
2500 case WLAN_AUTH_SAE:
2501 break;
2502 case WLAN_AUTH_SHARED_KEY:
2503 if (ifmgd->auth_data->expected_transaction != 4) {
2504 ieee80211_auth_challenge(sdata, mgmt, len);
2505 /* need another frame */
2506 return;
2507 }
2508 break;
2509 default:
2510 WARN_ONCE(1, "invalid auth alg %d",
2511 ifmgd->auth_data->algorithm);
2512 return;
2513 }
2514
2515 sdata_info(sdata, "authenticated\n");
2516 ifmgd->auth_data->done = true;
2517 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2518 ifmgd->auth_data->timeout_started = true;
2519 run_again(sdata, ifmgd->auth_data->timeout);
2520
2521 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2522 ifmgd->auth_data->expected_transaction != 2) {
2523 /*
2524 * Report auth frame to user space for processing since another
2525 * round of Authentication frames is still needed.
2526 */
2527 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2528 return;
2529 }
2530
2531 /* move station state to auth */
2532 mutex_lock(&sdata->local->sta_mtx);
2533 sta = sta_info_get(sdata, bssid);
2534 if (!sta) {
2535 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2536 goto out_err;
2537 }
2538 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2539 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2540 goto out_err;
2541 }
2542 mutex_unlock(&sdata->local->sta_mtx);
2543
2544 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2545 return;
2546 out_err:
2547 mutex_unlock(&sdata->local->sta_mtx);
2548 /* ignore frame -- wait for timeout */
2549 }
2550
2551 #define case_WLAN(type) \
2552 case WLAN_REASON_##type: return #type
2553
2554 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2555 {
2556 switch (reason_code) {
2557 case_WLAN(UNSPECIFIED);
2558 case_WLAN(PREV_AUTH_NOT_VALID);
2559 case_WLAN(DEAUTH_LEAVING);
2560 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2561 case_WLAN(DISASSOC_AP_BUSY);
2562 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2563 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2564 case_WLAN(DISASSOC_STA_HAS_LEFT);
2565 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2566 case_WLAN(DISASSOC_BAD_POWER);
2567 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2568 case_WLAN(INVALID_IE);
2569 case_WLAN(MIC_FAILURE);
2570 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2571 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2572 case_WLAN(IE_DIFFERENT);
2573 case_WLAN(INVALID_GROUP_CIPHER);
2574 case_WLAN(INVALID_PAIRWISE_CIPHER);
2575 case_WLAN(INVALID_AKMP);
2576 case_WLAN(UNSUPP_RSN_VERSION);
2577 case_WLAN(INVALID_RSN_IE_CAP);
2578 case_WLAN(IEEE8021X_FAILED);
2579 case_WLAN(CIPHER_SUITE_REJECTED);
2580 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2581 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2582 case_WLAN(DISASSOC_LOW_ACK);
2583 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2584 case_WLAN(QSTA_LEAVE_QBSS);
2585 case_WLAN(QSTA_NOT_USE);
2586 case_WLAN(QSTA_REQUIRE_SETUP);
2587 case_WLAN(QSTA_TIMEOUT);
2588 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2589 case_WLAN(MESH_PEER_CANCELED);
2590 case_WLAN(MESH_MAX_PEERS);
2591 case_WLAN(MESH_CONFIG);
2592 case_WLAN(MESH_CLOSE);
2593 case_WLAN(MESH_MAX_RETRIES);
2594 case_WLAN(MESH_CONFIRM_TIMEOUT);
2595 case_WLAN(MESH_INVALID_GTK);
2596 case_WLAN(MESH_INCONSISTENT_PARAM);
2597 case_WLAN(MESH_INVALID_SECURITY);
2598 case_WLAN(MESH_PATH_ERROR);
2599 case_WLAN(MESH_PATH_NOFORWARD);
2600 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2601 case_WLAN(MAC_EXISTS_IN_MBSS);
2602 case_WLAN(MESH_CHAN_REGULATORY);
2603 case_WLAN(MESH_CHAN);
2604 default: return "<unknown>";
2605 }
2606 }
2607
2608 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2609 struct ieee80211_mgmt *mgmt, size_t len)
2610 {
2611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2612 const u8 *bssid = NULL;
2613 u16 reason_code;
2614
2615 sdata_assert_lock(sdata);
2616
2617 if (len < 24 + 2)
2618 return;
2619
2620 if (!ifmgd->associated ||
2621 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2622 return;
2623
2624 bssid = ifmgd->associated->bssid;
2625
2626 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2627
2628 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2629 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2630
2631 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2632
2633 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2634 }
2635
2636
2637 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2638 struct ieee80211_mgmt *mgmt, size_t len)
2639 {
2640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2641 u16 reason_code;
2642
2643 sdata_assert_lock(sdata);
2644
2645 if (len < 24 + 2)
2646 return;
2647
2648 if (!ifmgd->associated ||
2649 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2650 return;
2651
2652 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2653
2654 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2655 mgmt->sa, reason_code);
2656
2657 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2658
2659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2660 }
2661
2662 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2663 u8 *supp_rates, unsigned int supp_rates_len,
2664 u32 *rates, u32 *basic_rates,
2665 bool *have_higher_than_11mbit,
2666 int *min_rate, int *min_rate_index,
2667 int shift, u32 rate_flags)
2668 {
2669 int i, j;
2670
2671 for (i = 0; i < supp_rates_len; i++) {
2672 int rate = supp_rates[i] & 0x7f;
2673 bool is_basic = !!(supp_rates[i] & 0x80);
2674
2675 if ((rate * 5 * (1 << shift)) > 110)
2676 *have_higher_than_11mbit = true;
2677
2678 /*
2679 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2680 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2681 *
2682 * Note: Even through the membership selector and the basic
2683 * rate flag share the same bit, they are not exactly
2684 * the same.
2685 */
2686 if (!!(supp_rates[i] & 0x80) &&
2687 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2688 continue;
2689
2690 for (j = 0; j < sband->n_bitrates; j++) {
2691 struct ieee80211_rate *br;
2692 int brate;
2693
2694 br = &sband->bitrates[j];
2695 if ((rate_flags & br->flags) != rate_flags)
2696 continue;
2697
2698 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2699 if (brate == rate) {
2700 *rates |= BIT(j);
2701 if (is_basic)
2702 *basic_rates |= BIT(j);
2703 if ((rate * 5) < *min_rate) {
2704 *min_rate = rate * 5;
2705 *min_rate_index = j;
2706 }
2707 break;
2708 }
2709 }
2710 }
2711 }
2712
2713 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2714 bool assoc)
2715 {
2716 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2717
2718 sdata_assert_lock(sdata);
2719
2720 if (!assoc) {
2721 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2722
2723 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2724 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2725 sdata->u.mgd.flags = 0;
2726 mutex_lock(&sdata->local->mtx);
2727 ieee80211_vif_release_channel(sdata);
2728 mutex_unlock(&sdata->local->mtx);
2729 }
2730
2731 kfree(assoc_data);
2732 sdata->u.mgd.assoc_data = NULL;
2733 }
2734
2735 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2736 struct cfg80211_bss *cbss,
2737 struct ieee80211_mgmt *mgmt, size_t len)
2738 {
2739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2740 struct ieee80211_local *local = sdata->local;
2741 struct ieee80211_supported_band *sband;
2742 struct sta_info *sta;
2743 u8 *pos;
2744 u16 capab_info, aid;
2745 struct ieee802_11_elems elems;
2746 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2747 const struct cfg80211_bss_ies *bss_ies = NULL;
2748 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2749 u32 changed = 0;
2750 int err;
2751 bool ret;
2752
2753 /* AssocResp and ReassocResp have identical structure */
2754
2755 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2756 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2757
2758 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2759 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2760 aid);
2761 aid &= ~(BIT(15) | BIT(14));
2762
2763 ifmgd->broken_ap = false;
2764
2765 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2766 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2767 aid);
2768 aid = 0;
2769 ifmgd->broken_ap = true;
2770 }
2771
2772 pos = mgmt->u.assoc_resp.variable;
2773 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2774
2775 if (!elems.supp_rates) {
2776 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2777 return false;
2778 }
2779
2780 ifmgd->aid = aid;
2781
2782 /*
2783 * Some APs are erroneously not including some information in their
2784 * (re)association response frames. Try to recover by using the data
2785 * from the beacon or probe response. This seems to afflict mobile
2786 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2787 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2788 */
2789 if ((assoc_data->wmm && !elems.wmm_param) ||
2790 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2791 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2792 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2793 (!elems.vht_cap_elem || !elems.vht_operation))) {
2794 const struct cfg80211_bss_ies *ies;
2795 struct ieee802_11_elems bss_elems;
2796
2797 rcu_read_lock();
2798 ies = rcu_dereference(cbss->ies);
2799 if (ies)
2800 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2801 GFP_ATOMIC);
2802 rcu_read_unlock();
2803 if (!bss_ies)
2804 return false;
2805
2806 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2807 false, &bss_elems);
2808 if (assoc_data->wmm &&
2809 !elems.wmm_param && bss_elems.wmm_param) {
2810 elems.wmm_param = bss_elems.wmm_param;
2811 sdata_info(sdata,
2812 "AP bug: WMM param missing from AssocResp\n");
2813 }
2814
2815 /*
2816 * Also check if we requested HT/VHT, otherwise the AP doesn't
2817 * have to include the IEs in the (re)association response.
2818 */
2819 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2820 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2821 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2822 sdata_info(sdata,
2823 "AP bug: HT capability missing from AssocResp\n");
2824 }
2825 if (!elems.ht_operation && bss_elems.ht_operation &&
2826 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2827 elems.ht_operation = bss_elems.ht_operation;
2828 sdata_info(sdata,
2829 "AP bug: HT operation missing from AssocResp\n");
2830 }
2831 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2832 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2833 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2834 sdata_info(sdata,
2835 "AP bug: VHT capa missing from AssocResp\n");
2836 }
2837 if (!elems.vht_operation && bss_elems.vht_operation &&
2838 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2839 elems.vht_operation = bss_elems.vht_operation;
2840 sdata_info(sdata,
2841 "AP bug: VHT operation missing from AssocResp\n");
2842 }
2843 }
2844
2845 /*
2846 * We previously checked these in the beacon/probe response, so
2847 * they should be present here. This is just a safety net.
2848 */
2849 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2850 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2851 sdata_info(sdata,
2852 "HT AP is missing WMM params or HT capability/operation\n");
2853 ret = false;
2854 goto out;
2855 }
2856
2857 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2858 (!elems.vht_cap_elem || !elems.vht_operation)) {
2859 sdata_info(sdata,
2860 "VHT AP is missing VHT capability/operation\n");
2861 ret = false;
2862 goto out;
2863 }
2864
2865 mutex_lock(&sdata->local->sta_mtx);
2866 /*
2867 * station info was already allocated and inserted before
2868 * the association and should be available to us
2869 */
2870 sta = sta_info_get(sdata, cbss->bssid);
2871 if (WARN_ON(!sta)) {
2872 mutex_unlock(&sdata->local->sta_mtx);
2873 ret = false;
2874 goto out;
2875 }
2876
2877 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2878
2879 /* Set up internal HT/VHT capabilities */
2880 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2881 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2882 elems.ht_cap_elem, sta);
2883
2884 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2885 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2886 elems.vht_cap_elem, sta);
2887
2888 /*
2889 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2890 * in their association response, so ignore that data for our own
2891 * configuration. If it changed since the last beacon, we'll get the
2892 * next beacon and update then.
2893 */
2894
2895 /*
2896 * If an operating mode notification IE is present, override the
2897 * NSS calculation (that would be done in rate_control_rate_init())
2898 * and use the # of streams from that element.
2899 */
2900 if (elems.opmode_notif &&
2901 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2902 u8 nss;
2903
2904 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2905 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2906 nss += 1;
2907 sta->sta.rx_nss = nss;
2908 }
2909
2910 rate_control_rate_init(sta);
2911
2912 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2913 set_sta_flag(sta, WLAN_STA_MFP);
2914
2915 sta->sta.wme = elems.wmm_param;
2916
2917 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2918 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2919 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2920 if (err) {
2921 sdata_info(sdata,
2922 "failed to move station %pM to desired state\n",
2923 sta->sta.addr);
2924 WARN_ON(__sta_info_destroy(sta));
2925 mutex_unlock(&sdata->local->sta_mtx);
2926 ret = false;
2927 goto out;
2928 }
2929
2930 mutex_unlock(&sdata->local->sta_mtx);
2931
2932 /*
2933 * Always handle WMM once after association regardless
2934 * of the first value the AP uses. Setting -1 here has
2935 * that effect because the AP values is an unsigned
2936 * 4-bit value.
2937 */
2938 ifmgd->wmm_last_param_set = -1;
2939
2940 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2941 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2942 elems.wmm_param_len);
2943 else
2944 ieee80211_set_wmm_default(sdata, false);
2945 changed |= BSS_CHANGED_QOS;
2946
2947 /* set AID and assoc capability,
2948 * ieee80211_set_associated() will tell the driver */
2949 bss_conf->aid = aid;
2950 bss_conf->assoc_capability = capab_info;
2951 ieee80211_set_associated(sdata, cbss, changed);
2952
2953 /*
2954 * If we're using 4-addr mode, let the AP know that we're
2955 * doing so, so that it can create the STA VLAN on its side
2956 */
2957 if (ifmgd->use_4addr)
2958 ieee80211_send_4addr_nullfunc(local, sdata);
2959
2960 /*
2961 * Start timer to probe the connection to the AP now.
2962 * Also start the timer that will detect beacon loss.
2963 */
2964 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2965 ieee80211_sta_reset_beacon_monitor(sdata);
2966
2967 ret = true;
2968 out:
2969 kfree(bss_ies);
2970 return ret;
2971 }
2972
2973 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2974 struct ieee80211_mgmt *mgmt,
2975 size_t len)
2976 {
2977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2978 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2979 u16 capab_info, status_code, aid;
2980 struct ieee802_11_elems elems;
2981 int ac, uapsd_queues = -1;
2982 u8 *pos;
2983 bool reassoc;
2984 struct cfg80211_bss *bss;
2985
2986 sdata_assert_lock(sdata);
2987
2988 if (!assoc_data)
2989 return;
2990 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2991 return;
2992
2993 /*
2994 * AssocResp and ReassocResp have identical structure, so process both
2995 * of them in this function.
2996 */
2997
2998 if (len < 24 + 6)
2999 return;
3000
3001 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3002 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3003 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3004 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3005
3006 sdata_info(sdata,
3007 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3008 reassoc ? "Rea" : "A", mgmt->sa,
3009 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3010
3011 pos = mgmt->u.assoc_resp.variable;
3012 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3013
3014 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3015 elems.timeout_int &&
3016 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3017 u32 tu, ms;
3018 tu = le32_to_cpu(elems.timeout_int->value);
3019 ms = tu * 1024 / 1000;
3020 sdata_info(sdata,
3021 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3022 mgmt->sa, tu, ms);
3023 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3024 assoc_data->timeout_started = true;
3025 if (ms > IEEE80211_ASSOC_TIMEOUT)
3026 run_again(sdata, assoc_data->timeout);
3027 return;
3028 }
3029
3030 bss = assoc_data->bss;
3031
3032 if (status_code != WLAN_STATUS_SUCCESS) {
3033 sdata_info(sdata, "%pM denied association (code=%d)\n",
3034 mgmt->sa, status_code);
3035 ieee80211_destroy_assoc_data(sdata, false);
3036 } else {
3037 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3038 /* oops -- internal error -- send timeout for now */
3039 ieee80211_destroy_assoc_data(sdata, false);
3040 cfg80211_assoc_timeout(sdata->dev, bss);
3041 return;
3042 }
3043 sdata_info(sdata, "associated\n");
3044
3045 /*
3046 * destroy assoc_data afterwards, as otherwise an idle
3047 * recalc after assoc_data is NULL but before associated
3048 * is set can cause the interface to go idle
3049 */
3050 ieee80211_destroy_assoc_data(sdata, true);
3051
3052 /* get uapsd queues configuration */
3053 uapsd_queues = 0;
3054 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3055 if (sdata->tx_conf[ac].uapsd)
3056 uapsd_queues |= BIT(ac);
3057 }
3058
3059 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3060 }
3061
3062 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3063 struct ieee80211_mgmt *mgmt, size_t len,
3064 struct ieee80211_rx_status *rx_status,
3065 struct ieee802_11_elems *elems)
3066 {
3067 struct ieee80211_local *local = sdata->local;
3068 struct ieee80211_bss *bss;
3069 struct ieee80211_channel *channel;
3070
3071 sdata_assert_lock(sdata);
3072
3073 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3074 if (!channel)
3075 return;
3076
3077 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3078 channel);
3079 if (bss) {
3080 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3081 ieee80211_rx_bss_put(local, bss);
3082 }
3083 }
3084
3085
3086 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3087 struct sk_buff *skb)
3088 {
3089 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3090 struct ieee80211_if_managed *ifmgd;
3091 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3092 size_t baselen, len = skb->len;
3093 struct ieee802_11_elems elems;
3094
3095 ifmgd = &sdata->u.mgd;
3096
3097 sdata_assert_lock(sdata);
3098
3099 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3100 return; /* ignore ProbeResp to foreign address */
3101
3102 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3103 if (baselen > len)
3104 return;
3105
3106 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3107 false, &elems);
3108
3109 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3110
3111 if (ifmgd->associated &&
3112 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3113 ieee80211_reset_ap_probe(sdata);
3114
3115 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3116 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3117 /* got probe response, continue with auth */
3118 sdata_info(sdata, "direct probe responded\n");
3119 ifmgd->auth_data->tries = 0;
3120 ifmgd->auth_data->timeout = jiffies;
3121 ifmgd->auth_data->timeout_started = true;
3122 run_again(sdata, ifmgd->auth_data->timeout);
3123 }
3124 }
3125
3126 /*
3127 * This is the canonical list of information elements we care about,
3128 * the filter code also gives us all changes to the Microsoft OUI
3129 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3130 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3131 * changes to requested client power.
3132 *
3133 * We implement beacon filtering in software since that means we can
3134 * avoid processing the frame here and in cfg80211, and userspace
3135 * will not be able to tell whether the hardware supports it or not.
3136 *
3137 * XXX: This list needs to be dynamic -- userspace needs to be able to
3138 * add items it requires. It also needs to be able to tell us to
3139 * look out for other vendor IEs.
3140 */
3141 static const u64 care_about_ies =
3142 (1ULL << WLAN_EID_COUNTRY) |
3143 (1ULL << WLAN_EID_ERP_INFO) |
3144 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3145 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3146 (1ULL << WLAN_EID_HT_CAPABILITY) |
3147 (1ULL << WLAN_EID_HT_OPERATION);
3148
3149 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3150 struct ieee80211_mgmt *mgmt, size_t len,
3151 struct ieee80211_rx_status *rx_status)
3152 {
3153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3154 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3155 size_t baselen;
3156 struct ieee802_11_elems elems;
3157 struct ieee80211_local *local = sdata->local;
3158 struct ieee80211_chanctx_conf *chanctx_conf;
3159 struct ieee80211_channel *chan;
3160 struct sta_info *sta;
3161 u32 changed = 0;
3162 bool erp_valid;
3163 u8 erp_value = 0;
3164 u32 ncrc;
3165 u8 *bssid;
3166 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3167
3168 sdata_assert_lock(sdata);
3169
3170 /* Process beacon from the current BSS */
3171 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3172 if (baselen > len)
3173 return;
3174
3175 rcu_read_lock();
3176 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3177 if (!chanctx_conf) {
3178 rcu_read_unlock();
3179 return;
3180 }
3181
3182 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3183 rcu_read_unlock();
3184 return;
3185 }
3186 chan = chanctx_conf->def.chan;
3187 rcu_read_unlock();
3188
3189 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3190 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3191 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3192 len - baselen, false, &elems);
3193
3194 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3195 if (elems.tim && !elems.parse_error) {
3196 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3197 ifmgd->dtim_period = tim_ie->dtim_period;
3198 }
3199 ifmgd->have_beacon = true;
3200 ifmgd->assoc_data->need_beacon = false;
3201 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3202 sdata->vif.bss_conf.sync_tsf =
3203 le64_to_cpu(mgmt->u.beacon.timestamp);
3204 sdata->vif.bss_conf.sync_device_ts =
3205 rx_status->device_timestamp;
3206 if (elems.tim)
3207 sdata->vif.bss_conf.sync_dtim_count =
3208 elems.tim->dtim_count;
3209 else
3210 sdata->vif.bss_conf.sync_dtim_count = 0;
3211 }
3212 /* continue assoc process */
3213 ifmgd->assoc_data->timeout = jiffies;
3214 ifmgd->assoc_data->timeout_started = true;
3215 run_again(sdata, ifmgd->assoc_data->timeout);
3216 return;
3217 }
3218
3219 if (!ifmgd->associated ||
3220 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3221 return;
3222 bssid = ifmgd->associated->bssid;
3223
3224 /* Track average RSSI from the Beacon frames of the current AP */
3225 ifmgd->last_beacon_signal = rx_status->signal;
3226 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3227 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3228 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3229 ifmgd->last_cqm_event_signal = 0;
3230 ifmgd->count_beacon_signal = 1;
3231 ifmgd->last_ave_beacon_signal = 0;
3232 } else {
3233 ifmgd->ave_beacon_signal =
3234 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3235 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3236 ifmgd->ave_beacon_signal) / 16;
3237 ifmgd->count_beacon_signal++;
3238 }
3239
3240 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3241 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3242 int sig = ifmgd->ave_beacon_signal;
3243 int last_sig = ifmgd->last_ave_beacon_signal;
3244
3245 /*
3246 * if signal crosses either of the boundaries, invoke callback
3247 * with appropriate parameters
3248 */
3249 if (sig > ifmgd->rssi_max_thold &&
3250 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3251 ifmgd->last_ave_beacon_signal = sig;
3252 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3253 } else if (sig < ifmgd->rssi_min_thold &&
3254 (last_sig >= ifmgd->rssi_max_thold ||
3255 last_sig == 0)) {
3256 ifmgd->last_ave_beacon_signal = sig;
3257 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3258 }
3259 }
3260
3261 if (bss_conf->cqm_rssi_thold &&
3262 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3263 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3264 int sig = ifmgd->ave_beacon_signal / 16;
3265 int last_event = ifmgd->last_cqm_event_signal;
3266 int thold = bss_conf->cqm_rssi_thold;
3267 int hyst = bss_conf->cqm_rssi_hyst;
3268 if (sig < thold &&
3269 (last_event == 0 || sig < last_event - hyst)) {
3270 ifmgd->last_cqm_event_signal = sig;
3271 ieee80211_cqm_rssi_notify(
3272 &sdata->vif,
3273 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3274 GFP_KERNEL);
3275 } else if (sig > thold &&
3276 (last_event == 0 || sig > last_event + hyst)) {
3277 ifmgd->last_cqm_event_signal = sig;
3278 ieee80211_cqm_rssi_notify(
3279 &sdata->vif,
3280 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3281 GFP_KERNEL);
3282 }
3283 }
3284
3285 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3286 mlme_dbg_ratelimited(sdata,
3287 "cancelling AP probe due to a received beacon\n");
3288 ieee80211_reset_ap_probe(sdata);
3289 }
3290
3291 /*
3292 * Push the beacon loss detection into the future since
3293 * we are processing a beacon from the AP just now.
3294 */
3295 ieee80211_sta_reset_beacon_monitor(sdata);
3296
3297 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3298 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3299 len - baselen, false, &elems,
3300 care_about_ies, ncrc);
3301
3302 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3303 bool directed_tim = ieee80211_check_tim(elems.tim,
3304 elems.tim_len,
3305 ifmgd->aid);
3306 if (directed_tim) {
3307 if (local->hw.conf.dynamic_ps_timeout > 0) {
3308 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3309 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3310 ieee80211_hw_config(local,
3311 IEEE80211_CONF_CHANGE_PS);
3312 }
3313 ieee80211_send_nullfunc(local, sdata, 0);
3314 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3315 local->pspolling = true;
3316
3317 /*
3318 * Here is assumed that the driver will be
3319 * able to send ps-poll frame and receive a
3320 * response even though power save mode is
3321 * enabled, but some drivers might require
3322 * to disable power save here. This needs
3323 * to be investigated.
3324 */
3325 ieee80211_send_pspoll(local, sdata);
3326 }
3327 }
3328 }
3329
3330 if (sdata->vif.p2p) {
3331 struct ieee80211_p2p_noa_attr noa = {};
3332 int ret;
3333
3334 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3335 len - baselen,
3336 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3337 (u8 *) &noa, sizeof(noa));
3338 if (ret >= 2) {
3339 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3340 /* valid noa_attr and index changed */
3341 sdata->u.mgd.p2p_noa_index = noa.index;
3342 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3343 changed |= BSS_CHANGED_P2P_PS;
3344 /*
3345 * make sure we update all information, the CRC
3346 * mechanism doesn't look at P2P attributes.
3347 */
3348 ifmgd->beacon_crc_valid = false;
3349 }
3350 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3351 /* noa_attr not found and we had valid noa_attr before */
3352 sdata->u.mgd.p2p_noa_index = -1;
3353 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3354 changed |= BSS_CHANGED_P2P_PS;
3355 ifmgd->beacon_crc_valid = false;
3356 }
3357 }
3358
3359 if (ifmgd->csa_waiting_bcn)
3360 ieee80211_chswitch_post_beacon(sdata);
3361
3362 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3363 return;
3364 ifmgd->beacon_crc = ncrc;
3365 ifmgd->beacon_crc_valid = true;
3366
3367 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3368
3369 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3370 rx_status->device_timestamp,
3371 &elems, true);
3372
3373 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3374 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3375 elems.wmm_param_len))
3376 changed |= BSS_CHANGED_QOS;
3377
3378 /*
3379 * If we haven't had a beacon before, tell the driver about the
3380 * DTIM period (and beacon timing if desired) now.
3381 */
3382 if (!ifmgd->have_beacon) {
3383 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3384 if (elems.tim)
3385 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3386 else
3387 bss_conf->dtim_period = 1;
3388
3389 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3390 sdata->vif.bss_conf.sync_tsf =
3391 le64_to_cpu(mgmt->u.beacon.timestamp);
3392 sdata->vif.bss_conf.sync_device_ts =
3393 rx_status->device_timestamp;
3394 if (elems.tim)
3395 sdata->vif.bss_conf.sync_dtim_count =
3396 elems.tim->dtim_count;
3397 else
3398 sdata->vif.bss_conf.sync_dtim_count = 0;
3399 }
3400
3401 changed |= BSS_CHANGED_BEACON_INFO;
3402 ifmgd->have_beacon = true;
3403
3404 mutex_lock(&local->iflist_mtx);
3405 ieee80211_recalc_ps(local, -1);
3406 mutex_unlock(&local->iflist_mtx);
3407
3408 ieee80211_recalc_ps_vif(sdata);
3409 }
3410
3411 if (elems.erp_info) {
3412 erp_valid = true;
3413 erp_value = elems.erp_info[0];
3414 } else {
3415 erp_valid = false;
3416 }
3417 changed |= ieee80211_handle_bss_capability(sdata,
3418 le16_to_cpu(mgmt->u.beacon.capab_info),
3419 erp_valid, erp_value);
3420
3421 mutex_lock(&local->sta_mtx);
3422 sta = sta_info_get(sdata, bssid);
3423
3424 if (ieee80211_config_bw(sdata, sta,
3425 elems.ht_cap_elem, elems.ht_operation,
3426 elems.vht_operation, bssid, &changed)) {
3427 mutex_unlock(&local->sta_mtx);
3428 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3429 WLAN_REASON_DEAUTH_LEAVING,
3430 true, deauth_buf);
3431 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3432 sizeof(deauth_buf));
3433 return;
3434 }
3435
3436 if (sta && elems.opmode_notif)
3437 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3438 rx_status->band, true);
3439 mutex_unlock(&local->sta_mtx);
3440
3441 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3442 elems.country_elem,
3443 elems.country_elem_len,
3444 elems.pwr_constr_elem,
3445 elems.cisco_dtpc_elem);
3446
3447 ieee80211_bss_info_change_notify(sdata, changed);
3448 }
3449
3450 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3451 struct sk_buff *skb)
3452 {
3453 struct ieee80211_rx_status *rx_status;
3454 struct ieee80211_mgmt *mgmt;
3455 u16 fc;
3456 struct ieee802_11_elems elems;
3457 int ies_len;
3458
3459 rx_status = (struct ieee80211_rx_status *) skb->cb;
3460 mgmt = (struct ieee80211_mgmt *) skb->data;
3461 fc = le16_to_cpu(mgmt->frame_control);
3462
3463 sdata_lock(sdata);
3464
3465 switch (fc & IEEE80211_FCTL_STYPE) {
3466 case IEEE80211_STYPE_BEACON:
3467 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3468 break;
3469 case IEEE80211_STYPE_PROBE_RESP:
3470 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3471 break;
3472 case IEEE80211_STYPE_AUTH:
3473 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3474 break;
3475 case IEEE80211_STYPE_DEAUTH:
3476 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3477 break;
3478 case IEEE80211_STYPE_DISASSOC:
3479 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3480 break;
3481 case IEEE80211_STYPE_ASSOC_RESP:
3482 case IEEE80211_STYPE_REASSOC_RESP:
3483 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3484 break;
3485 case IEEE80211_STYPE_ACTION:
3486 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3487 ies_len = skb->len -
3488 offsetof(struct ieee80211_mgmt,
3489 u.action.u.chan_switch.variable);
3490
3491 if (ies_len < 0)
3492 break;
3493
3494 ieee802_11_parse_elems(
3495 mgmt->u.action.u.chan_switch.variable,
3496 ies_len, true, &elems);
3497
3498 if (elems.parse_error)
3499 break;
3500
3501 ieee80211_sta_process_chanswitch(sdata,
3502 rx_status->mactime,
3503 rx_status->device_timestamp,
3504 &elems, false);
3505 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3506 ies_len = skb->len -
3507 offsetof(struct ieee80211_mgmt,
3508 u.action.u.ext_chan_switch.variable);
3509
3510 if (ies_len < 0)
3511 break;
3512
3513 ieee802_11_parse_elems(
3514 mgmt->u.action.u.ext_chan_switch.variable,
3515 ies_len, true, &elems);
3516
3517 if (elems.parse_error)
3518 break;
3519
3520 /* for the handling code pretend this was also an IE */
3521 elems.ext_chansw_ie =
3522 &mgmt->u.action.u.ext_chan_switch.data;
3523
3524 ieee80211_sta_process_chanswitch(sdata,
3525 rx_status->mactime,
3526 rx_status->device_timestamp,
3527 &elems, false);
3528 }
3529 break;
3530 }
3531 sdata_unlock(sdata);
3532 }
3533
3534 static void ieee80211_sta_timer(unsigned long data)
3535 {
3536 struct ieee80211_sub_if_data *sdata =
3537 (struct ieee80211_sub_if_data *) data;
3538
3539 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3540 }
3541
3542 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3543 u8 *bssid, u8 reason, bool tx)
3544 {
3545 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3546
3547 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3548 tx, frame_buf);
3549
3550 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3551 IEEE80211_DEAUTH_FRAME_LEN);
3552 }
3553
3554 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3555 {
3556 struct ieee80211_local *local = sdata->local;
3557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3558 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3559 u32 tx_flags = 0;
3560
3561 sdata_assert_lock(sdata);
3562
3563 if (WARN_ON_ONCE(!auth_data))
3564 return -EINVAL;
3565
3566 auth_data->tries++;
3567
3568 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3569 sdata_info(sdata, "authentication with %pM timed out\n",
3570 auth_data->bss->bssid);
3571
3572 /*
3573 * Most likely AP is not in the range so remove the
3574 * bss struct for that AP.
3575 */
3576 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3577
3578 return -ETIMEDOUT;
3579 }
3580
3581 drv_mgd_prepare_tx(local, sdata);
3582
3583 if (auth_data->bss->proberesp_ies) {
3584 u16 trans = 1;
3585 u16 status = 0;
3586
3587 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3588 auth_data->bss->bssid, auth_data->tries,
3589 IEEE80211_AUTH_MAX_TRIES);
3590
3591 auth_data->expected_transaction = 2;
3592
3593 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3594 trans = auth_data->sae_trans;
3595 status = auth_data->sae_status;
3596 auth_data->expected_transaction = trans;
3597 }
3598
3599 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3600 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3601 IEEE80211_TX_INTFL_MLME_CONN_TX;
3602
3603 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3604 auth_data->data, auth_data->data_len,
3605 auth_data->bss->bssid,
3606 auth_data->bss->bssid, NULL, 0, 0,
3607 tx_flags);
3608 } else {
3609 const u8 *ssidie;
3610
3611 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3612 auth_data->bss->bssid, auth_data->tries,
3613 IEEE80211_AUTH_MAX_TRIES);
3614
3615 rcu_read_lock();
3616 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3617 if (!ssidie) {
3618 rcu_read_unlock();
3619 return -EINVAL;
3620 }
3621 /*
3622 * Direct probe is sent to broadcast address as some APs
3623 * will not answer to direct packet in unassociated state.
3624 */
3625 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3626 NULL, 0, (u32) -1, true, 0,
3627 auth_data->bss->channel, false);
3628 rcu_read_unlock();
3629 }
3630
3631 if (tx_flags == 0) {
3632 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3633 auth_data->timeout_started = true;
3634 run_again(sdata, auth_data->timeout);
3635 } else {
3636 auth_data->timeout =
3637 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3638 auth_data->timeout_started = true;
3639 run_again(sdata, auth_data->timeout);
3640 }
3641
3642 return 0;
3643 }
3644
3645 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3646 {
3647 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3648 struct ieee80211_local *local = sdata->local;
3649
3650 sdata_assert_lock(sdata);
3651
3652 assoc_data->tries++;
3653 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3654 sdata_info(sdata, "association with %pM timed out\n",
3655 assoc_data->bss->bssid);
3656
3657 /*
3658 * Most likely AP is not in the range so remove the
3659 * bss struct for that AP.
3660 */
3661 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3662
3663 return -ETIMEDOUT;
3664 }
3665
3666 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3667 assoc_data->bss->bssid, assoc_data->tries,
3668 IEEE80211_ASSOC_MAX_TRIES);
3669 ieee80211_send_assoc(sdata);
3670
3671 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3672 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3673 assoc_data->timeout_started = true;
3674 run_again(sdata, assoc_data->timeout);
3675 } else {
3676 assoc_data->timeout =
3677 round_jiffies_up(jiffies +
3678 IEEE80211_ASSOC_TIMEOUT_LONG);
3679 assoc_data->timeout_started = true;
3680 run_again(sdata, assoc_data->timeout);
3681 }
3682
3683 return 0;
3684 }
3685
3686 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3687 __le16 fc, bool acked)
3688 {
3689 struct ieee80211_local *local = sdata->local;
3690
3691 sdata->u.mgd.status_fc = fc;
3692 sdata->u.mgd.status_acked = acked;
3693 sdata->u.mgd.status_received = true;
3694
3695 ieee80211_queue_work(&local->hw, &sdata->work);
3696 }
3697
3698 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3699 {
3700 struct ieee80211_local *local = sdata->local;
3701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3702
3703 sdata_lock(sdata);
3704
3705 if (ifmgd->status_received) {
3706 __le16 fc = ifmgd->status_fc;
3707 bool status_acked = ifmgd->status_acked;
3708
3709 ifmgd->status_received = false;
3710 if (ifmgd->auth_data &&
3711 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3712 if (status_acked) {
3713 ifmgd->auth_data->timeout =
3714 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3715 run_again(sdata, ifmgd->auth_data->timeout);
3716 } else {
3717 ifmgd->auth_data->timeout = jiffies - 1;
3718 }
3719 ifmgd->auth_data->timeout_started = true;
3720 } else if (ifmgd->assoc_data &&
3721 (ieee80211_is_assoc_req(fc) ||
3722 ieee80211_is_reassoc_req(fc))) {
3723 if (status_acked) {
3724 ifmgd->assoc_data->timeout =
3725 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3726 run_again(sdata, ifmgd->assoc_data->timeout);
3727 } else {
3728 ifmgd->assoc_data->timeout = jiffies - 1;
3729 }
3730 ifmgd->assoc_data->timeout_started = true;
3731 }
3732 }
3733
3734 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3735 time_after(jiffies, ifmgd->auth_data->timeout)) {
3736 if (ifmgd->auth_data->done) {
3737 /*
3738 * ok ... we waited for assoc but userspace didn't,
3739 * so let's just kill the auth data
3740 */
3741 ieee80211_destroy_auth_data(sdata, false);
3742 } else if (ieee80211_probe_auth(sdata)) {
3743 u8 bssid[ETH_ALEN];
3744
3745 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3746
3747 ieee80211_destroy_auth_data(sdata, false);
3748
3749 cfg80211_auth_timeout(sdata->dev, bssid);
3750 }
3751 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3752 run_again(sdata, ifmgd->auth_data->timeout);
3753
3754 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3755 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3756 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3757 ieee80211_do_assoc(sdata)) {
3758 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3759
3760 ieee80211_destroy_assoc_data(sdata, false);
3761 cfg80211_assoc_timeout(sdata->dev, bss);
3762 }
3763 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3764 run_again(sdata, ifmgd->assoc_data->timeout);
3765
3766 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3767 ifmgd->associated) {
3768 u8 bssid[ETH_ALEN];
3769 int max_tries;
3770
3771 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3772
3773 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3774 max_tries = max_nullfunc_tries;
3775 else
3776 max_tries = max_probe_tries;
3777
3778 /* ACK received for nullfunc probing frame */
3779 if (!ifmgd->probe_send_count)
3780 ieee80211_reset_ap_probe(sdata);
3781 else if (ifmgd->nullfunc_failed) {
3782 if (ifmgd->probe_send_count < max_tries) {
3783 mlme_dbg(sdata,
3784 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3785 bssid, ifmgd->probe_send_count,
3786 max_tries);
3787 ieee80211_mgd_probe_ap_send(sdata);
3788 } else {
3789 mlme_dbg(sdata,
3790 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3791 bssid);
3792 ieee80211_sta_connection_lost(sdata, bssid,
3793 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3794 false);
3795 }
3796 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3797 run_again(sdata, ifmgd->probe_timeout);
3798 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3799 mlme_dbg(sdata,
3800 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3801 bssid, probe_wait_ms);
3802 ieee80211_sta_connection_lost(sdata, bssid,
3803 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3804 } else if (ifmgd->probe_send_count < max_tries) {
3805 mlme_dbg(sdata,
3806 "No probe response from AP %pM after %dms, try %d/%i\n",
3807 bssid, probe_wait_ms,
3808 ifmgd->probe_send_count, max_tries);
3809 ieee80211_mgd_probe_ap_send(sdata);
3810 } else {
3811 /*
3812 * We actually lost the connection ... or did we?
3813 * Let's make sure!
3814 */
3815 wiphy_debug(local->hw.wiphy,
3816 "%s: No probe response from AP %pM"
3817 " after %dms, disconnecting.\n",
3818 sdata->name,
3819 bssid, probe_wait_ms);
3820
3821 ieee80211_sta_connection_lost(sdata, bssid,
3822 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3823 }
3824 }
3825
3826 sdata_unlock(sdata);
3827 }
3828
3829 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3830 {
3831 struct ieee80211_sub_if_data *sdata =
3832 (struct ieee80211_sub_if_data *) data;
3833 struct ieee80211_local *local = sdata->local;
3834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3835
3836 if (local->quiescing)
3837 return;
3838
3839 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3840 return;
3841
3842 sdata->u.mgd.connection_loss = false;
3843 ieee80211_queue_work(&sdata->local->hw,
3844 &sdata->u.mgd.beacon_connection_loss_work);
3845 }
3846
3847 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3848 {
3849 struct ieee80211_sub_if_data *sdata =
3850 (struct ieee80211_sub_if_data *) data;
3851 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3852 struct ieee80211_local *local = sdata->local;
3853
3854 if (local->quiescing)
3855 return;
3856
3857 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3858 return;
3859
3860 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3861 }
3862
3863 static void ieee80211_sta_monitor_work(struct work_struct *work)
3864 {
3865 struct ieee80211_sub_if_data *sdata =
3866 container_of(work, struct ieee80211_sub_if_data,
3867 u.mgd.monitor_work);
3868
3869 ieee80211_mgd_probe_ap(sdata, false);
3870 }
3871
3872 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3873 {
3874 u32 flags;
3875
3876 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3877 __ieee80211_stop_poll(sdata);
3878
3879 /* let's probe the connection once */
3880 flags = sdata->local->hw.flags;
3881 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3882 ieee80211_queue_work(&sdata->local->hw,
3883 &sdata->u.mgd.monitor_work);
3884 /* and do all the other regular work too */
3885 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3886 }
3887 }
3888
3889 #ifdef CONFIG_PM
3890 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3891 {
3892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3893 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3894
3895 sdata_lock(sdata);
3896
3897 if (ifmgd->auth_data || ifmgd->assoc_data) {
3898 const u8 *bssid = ifmgd->auth_data ?
3899 ifmgd->auth_data->bss->bssid :
3900 ifmgd->assoc_data->bss->bssid;
3901
3902 /*
3903 * If we are trying to authenticate / associate while suspending,
3904 * cfg80211 won't know and won't actually abort those attempts,
3905 * thus we need to do that ourselves.
3906 */
3907 ieee80211_send_deauth_disassoc(sdata, bssid,
3908 IEEE80211_STYPE_DEAUTH,
3909 WLAN_REASON_DEAUTH_LEAVING,
3910 false, frame_buf);
3911 if (ifmgd->assoc_data)
3912 ieee80211_destroy_assoc_data(sdata, false);
3913 if (ifmgd->auth_data)
3914 ieee80211_destroy_auth_data(sdata, false);
3915 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3916 IEEE80211_DEAUTH_FRAME_LEN);
3917 }
3918
3919 sdata_unlock(sdata);
3920 }
3921
3922 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3923 {
3924 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3925
3926 sdata_lock(sdata);
3927 if (!ifmgd->associated) {
3928 sdata_unlock(sdata);
3929 return;
3930 }
3931
3932 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3933 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3934 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3935 ieee80211_sta_connection_lost(sdata,
3936 ifmgd->associated->bssid,
3937 WLAN_REASON_UNSPECIFIED,
3938 true);
3939 sdata_unlock(sdata);
3940 return;
3941 }
3942 sdata_unlock(sdata);
3943 }
3944 #endif
3945
3946 /* interface setup */
3947 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3948 {
3949 struct ieee80211_if_managed *ifmgd;
3950
3951 ifmgd = &sdata->u.mgd;
3952 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3953 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3954 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3955 ieee80211_beacon_connection_loss_work);
3956 INIT_WORK(&ifmgd->csa_connection_drop_work,
3957 ieee80211_csa_connection_drop_work);
3958 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3959 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3960 ieee80211_tdls_peer_del_work);
3961 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3962 (unsigned long) sdata);
3963 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3964 (unsigned long) sdata);
3965 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3966 (unsigned long) sdata);
3967 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3968 (unsigned long) sdata);
3969 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
3970 ieee80211_sta_handle_tspec_ac_params_wk);
3971
3972 ifmgd->flags = 0;
3973 ifmgd->powersave = sdata->wdev.ps;
3974 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3975 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3976 ifmgd->p2p_noa_index = -1;
3977
3978 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
3979 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3980 else
3981 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3982 }
3983
3984 /* scan finished notification */
3985 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3986 {
3987 struct ieee80211_sub_if_data *sdata;
3988
3989 /* Restart STA timers */
3990 rcu_read_lock();
3991 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3992 if (ieee80211_sdata_running(sdata))
3993 ieee80211_restart_sta_timer(sdata);
3994 }
3995 rcu_read_unlock();
3996 }
3997
3998 int ieee80211_max_network_latency(struct notifier_block *nb,
3999 unsigned long data, void *dummy)
4000 {
4001 s32 latency_usec = (s32) data;
4002 struct ieee80211_local *local =
4003 container_of(nb, struct ieee80211_local,
4004 network_latency_notifier);
4005
4006 mutex_lock(&local->iflist_mtx);
4007 ieee80211_recalc_ps(local, latency_usec);
4008 mutex_unlock(&local->iflist_mtx);
4009
4010 return NOTIFY_OK;
4011 }
4012
4013 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4014 struct cfg80211_bss *cbss)
4015 {
4016 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4017 const u8 *ht_cap_ie, *vht_cap_ie;
4018 const struct ieee80211_ht_cap *ht_cap;
4019 const struct ieee80211_vht_cap *vht_cap;
4020 u8 chains = 1;
4021
4022 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4023 return chains;
4024
4025 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4026 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4027 ht_cap = (void *)(ht_cap_ie + 2);
4028 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4029 /*
4030 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4031 * "Tx Unequal Modulation Supported" fields.
4032 */
4033 }
4034
4035 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4036 return chains;
4037
4038 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4039 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4040 u8 nss;
4041 u16 tx_mcs_map;
4042
4043 vht_cap = (void *)(vht_cap_ie + 2);
4044 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4045 for (nss = 8; nss > 0; nss--) {
4046 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4047 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4048 break;
4049 }
4050 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4051 chains = max(chains, nss);
4052 }
4053
4054 return chains;
4055 }
4056
4057 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4058 struct cfg80211_bss *cbss)
4059 {
4060 struct ieee80211_local *local = sdata->local;
4061 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4062 const struct ieee80211_ht_cap *ht_cap = NULL;
4063 const struct ieee80211_ht_operation *ht_oper = NULL;
4064 const struct ieee80211_vht_operation *vht_oper = NULL;
4065 struct ieee80211_supported_band *sband;
4066 struct cfg80211_chan_def chandef;
4067 int ret;
4068
4069 sband = local->hw.wiphy->bands[cbss->channel->band];
4070
4071 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4072 IEEE80211_STA_DISABLE_80P80MHZ |
4073 IEEE80211_STA_DISABLE_160MHZ);
4074
4075 rcu_read_lock();
4076
4077 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4078 sband->ht_cap.ht_supported) {
4079 const u8 *ht_oper_ie, *ht_cap_ie;
4080
4081 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4082 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4083 ht_oper = (void *)(ht_oper_ie + 2);
4084
4085 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4086 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4087 ht_cap = (void *)(ht_cap_ie + 2);
4088
4089 if (!ht_cap) {
4090 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4091 ht_oper = NULL;
4092 }
4093 }
4094
4095 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4096 sband->vht_cap.vht_supported) {
4097 const u8 *vht_oper_ie, *vht_cap;
4098
4099 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4100 WLAN_EID_VHT_OPERATION);
4101 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4102 vht_oper = (void *)(vht_oper_ie + 2);
4103 if (vht_oper && !ht_oper) {
4104 vht_oper = NULL;
4105 sdata_info(sdata,
4106 "AP advertised VHT without HT, disabling both\n");
4107 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4108 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4109 }
4110
4111 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4112 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4113 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4114 vht_oper = NULL;
4115 }
4116 }
4117
4118 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4119 cbss->channel,
4120 ht_cap, ht_oper, vht_oper,
4121 &chandef, false);
4122
4123 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4124 local->rx_chains);
4125
4126 rcu_read_unlock();
4127
4128 /* will change later if needed */
4129 sdata->smps_mode = IEEE80211_SMPS_OFF;
4130
4131 mutex_lock(&local->mtx);
4132 /*
4133 * If this fails (possibly due to channel context sharing
4134 * on incompatible channels, e.g. 80+80 and 160 sharing the
4135 * same control channel) try to use a smaller bandwidth.
4136 */
4137 ret = ieee80211_vif_use_channel(sdata, &chandef,
4138 IEEE80211_CHANCTX_SHARED);
4139
4140 /* don't downgrade for 5 and 10 MHz channels, though. */
4141 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4142 chandef.width == NL80211_CHAN_WIDTH_10)
4143 goto out;
4144
4145 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4146 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4147 ret = ieee80211_vif_use_channel(sdata, &chandef,
4148 IEEE80211_CHANCTX_SHARED);
4149 }
4150 out:
4151 mutex_unlock(&local->mtx);
4152 return ret;
4153 }
4154
4155 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4156 struct cfg80211_bss *cbss, bool assoc)
4157 {
4158 struct ieee80211_local *local = sdata->local;
4159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4160 struct ieee80211_bss *bss = (void *)cbss->priv;
4161 struct sta_info *new_sta = NULL;
4162 bool have_sta = false;
4163 int err;
4164
4165 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4166 return -EINVAL;
4167
4168 if (assoc) {
4169 rcu_read_lock();
4170 have_sta = sta_info_get(sdata, cbss->bssid);
4171 rcu_read_unlock();
4172 }
4173
4174 if (!have_sta) {
4175 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4176 if (!new_sta)
4177 return -ENOMEM;
4178 }
4179 if (new_sta) {
4180 u32 rates = 0, basic_rates = 0;
4181 bool have_higher_than_11mbit;
4182 int min_rate = INT_MAX, min_rate_index = -1;
4183 struct ieee80211_chanctx_conf *chanctx_conf;
4184 struct ieee80211_supported_band *sband;
4185 const struct cfg80211_bss_ies *ies;
4186 int shift;
4187 u32 rate_flags;
4188
4189 sband = local->hw.wiphy->bands[cbss->channel->band];
4190
4191 err = ieee80211_prep_channel(sdata, cbss);
4192 if (err) {
4193 sta_info_free(local, new_sta);
4194 return -EINVAL;
4195 }
4196 shift = ieee80211_vif_get_shift(&sdata->vif);
4197
4198 rcu_read_lock();
4199 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4200 if (WARN_ON(!chanctx_conf)) {
4201 rcu_read_unlock();
4202 sta_info_free(local, new_sta);
4203 return -EINVAL;
4204 }
4205 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4206 rcu_read_unlock();
4207
4208 ieee80211_get_rates(sband, bss->supp_rates,
4209 bss->supp_rates_len,
4210 &rates, &basic_rates,
4211 &have_higher_than_11mbit,
4212 &min_rate, &min_rate_index,
4213 shift, rate_flags);
4214
4215 /*
4216 * This used to be a workaround for basic rates missing
4217 * in the association response frame. Now that we no
4218 * longer use the basic rates from there, it probably
4219 * doesn't happen any more, but keep the workaround so
4220 * in case some *other* APs are buggy in different ways
4221 * we can connect -- with a warning.
4222 */
4223 if (!basic_rates && min_rate_index >= 0) {
4224 sdata_info(sdata,
4225 "No basic rates, using min rate instead\n");
4226 basic_rates = BIT(min_rate_index);
4227 }
4228
4229 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4230 sdata->vif.bss_conf.basic_rates = basic_rates;
4231
4232 /* cf. IEEE 802.11 9.2.12 */
4233 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4234 have_higher_than_11mbit)
4235 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4236 else
4237 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4238
4239 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4240
4241 /* set timing information */
4242 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4243 rcu_read_lock();
4244 ies = rcu_dereference(cbss->beacon_ies);
4245 if (ies) {
4246 const u8 *tim_ie;
4247
4248 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4249 sdata->vif.bss_conf.sync_device_ts =
4250 bss->device_ts_beacon;
4251 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4252 ies->data, ies->len);
4253 if (tim_ie && tim_ie[1] >= 2)
4254 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4255 else
4256 sdata->vif.bss_conf.sync_dtim_count = 0;
4257 } else if (!(local->hw.flags &
4258 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4259 ies = rcu_dereference(cbss->proberesp_ies);
4260 /* must be non-NULL since beacon IEs were NULL */
4261 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4262 sdata->vif.bss_conf.sync_device_ts =
4263 bss->device_ts_presp;
4264 sdata->vif.bss_conf.sync_dtim_count = 0;
4265 } else {
4266 sdata->vif.bss_conf.sync_tsf = 0;
4267 sdata->vif.bss_conf.sync_device_ts = 0;
4268 sdata->vif.bss_conf.sync_dtim_count = 0;
4269 }
4270 rcu_read_unlock();
4271
4272 /* tell driver about BSSID, basic rates and timing */
4273 ieee80211_bss_info_change_notify(sdata,
4274 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4275 BSS_CHANGED_BEACON_INT);
4276
4277 if (assoc)
4278 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4279
4280 err = sta_info_insert(new_sta);
4281 new_sta = NULL;
4282 if (err) {
4283 sdata_info(sdata,
4284 "failed to insert STA entry for the AP (error %d)\n",
4285 err);
4286 return err;
4287 }
4288 } else
4289 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4290
4291 return 0;
4292 }
4293
4294 /* config hooks */
4295 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4296 struct cfg80211_auth_request *req)
4297 {
4298 struct ieee80211_local *local = sdata->local;
4299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4300 struct ieee80211_mgd_auth_data *auth_data;
4301 u16 auth_alg;
4302 int err;
4303
4304 /* prepare auth data structure */
4305
4306 switch (req->auth_type) {
4307 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4308 auth_alg = WLAN_AUTH_OPEN;
4309 break;
4310 case NL80211_AUTHTYPE_SHARED_KEY:
4311 if (IS_ERR(local->wep_tx_tfm))
4312 return -EOPNOTSUPP;
4313 auth_alg = WLAN_AUTH_SHARED_KEY;
4314 break;
4315 case NL80211_AUTHTYPE_FT:
4316 auth_alg = WLAN_AUTH_FT;
4317 break;
4318 case NL80211_AUTHTYPE_NETWORK_EAP:
4319 auth_alg = WLAN_AUTH_LEAP;
4320 break;
4321 case NL80211_AUTHTYPE_SAE:
4322 auth_alg = WLAN_AUTH_SAE;
4323 break;
4324 default:
4325 return -EOPNOTSUPP;
4326 }
4327
4328 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4329 req->ie_len, GFP_KERNEL);
4330 if (!auth_data)
4331 return -ENOMEM;
4332
4333 auth_data->bss = req->bss;
4334
4335 if (req->sae_data_len >= 4) {
4336 __le16 *pos = (__le16 *) req->sae_data;
4337 auth_data->sae_trans = le16_to_cpu(pos[0]);
4338 auth_data->sae_status = le16_to_cpu(pos[1]);
4339 memcpy(auth_data->data, req->sae_data + 4,
4340 req->sae_data_len - 4);
4341 auth_data->data_len += req->sae_data_len - 4;
4342 }
4343
4344 if (req->ie && req->ie_len) {
4345 memcpy(&auth_data->data[auth_data->data_len],
4346 req->ie, req->ie_len);
4347 auth_data->data_len += req->ie_len;
4348 }
4349
4350 if (req->key && req->key_len) {
4351 auth_data->key_len = req->key_len;
4352 auth_data->key_idx = req->key_idx;
4353 memcpy(auth_data->key, req->key, req->key_len);
4354 }
4355
4356 auth_data->algorithm = auth_alg;
4357
4358 /* try to authenticate/probe */
4359
4360 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4361 ifmgd->assoc_data) {
4362 err = -EBUSY;
4363 goto err_free;
4364 }
4365
4366 if (ifmgd->auth_data)
4367 ieee80211_destroy_auth_data(sdata, false);
4368
4369 /* prep auth_data so we don't go into idle on disassoc */
4370 ifmgd->auth_data = auth_data;
4371
4372 if (ifmgd->associated) {
4373 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4374
4375 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4376 WLAN_REASON_UNSPECIFIED,
4377 false, frame_buf);
4378
4379 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4380 sizeof(frame_buf));
4381 }
4382
4383 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4384
4385 err = ieee80211_prep_connection(sdata, req->bss, false);
4386 if (err)
4387 goto err_clear;
4388
4389 err = ieee80211_probe_auth(sdata);
4390 if (err) {
4391 sta_info_destroy_addr(sdata, req->bss->bssid);
4392 goto err_clear;
4393 }
4394
4395 /* hold our own reference */
4396 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4397 return 0;
4398
4399 err_clear:
4400 memset(ifmgd->bssid, 0, ETH_ALEN);
4401 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4402 ifmgd->auth_data = NULL;
4403 err_free:
4404 kfree(auth_data);
4405 return err;
4406 }
4407
4408 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4409 const u8 *wmm_param, int len)
4410 {
4411 const u8 *pos;
4412 size_t left;
4413
4414 if (len < 8)
4415 return false;
4416
4417 if (wmm_param[5] != 1 /* version */)
4418 return false;
4419
4420 pos = wmm_param + 8;
4421 left = len - 8;
4422
4423 for (; left >= 4; left -= 4, pos += 4) {
4424 u8 aifsn = pos[0] & 0x0f;
4425 u8 ecwmin = pos[1] & 0x0f;
4426 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4427 int aci = (pos[0] >> 5) & 0x03;
4428
4429 if (aifsn < 2) {
4430 sdata_info(sdata,
4431 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4432 aifsn, aci);
4433 return false;
4434 }
4435 if (ecwmin > ecwmax) {
4436 sdata_info(sdata,
4437 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4438 ecwmin, ecwmax, aci);
4439 return false;
4440 }
4441 }
4442
4443 return true;
4444 }
4445
4446 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4447 struct cfg80211_assoc_request *req)
4448 {
4449 struct ieee80211_local *local = sdata->local;
4450 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4451 struct ieee80211_bss *bss = (void *)req->bss->priv;
4452 struct ieee80211_mgd_assoc_data *assoc_data;
4453 const struct cfg80211_bss_ies *beacon_ies;
4454 struct ieee80211_supported_band *sband;
4455 const u8 *ssidie, *ht_ie, *vht_ie;
4456 int i, err;
4457
4458 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4459 if (!assoc_data)
4460 return -ENOMEM;
4461
4462 rcu_read_lock();
4463 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4464 if (!ssidie) {
4465 rcu_read_unlock();
4466 kfree(assoc_data);
4467 return -EINVAL;
4468 }
4469 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4470 assoc_data->ssid_len = ssidie[1];
4471 rcu_read_unlock();
4472
4473 if (ifmgd->associated) {
4474 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4475
4476 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4477 WLAN_REASON_UNSPECIFIED,
4478 false, frame_buf);
4479
4480 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4481 sizeof(frame_buf));
4482 }
4483
4484 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4485 err = -EBUSY;
4486 goto err_free;
4487 }
4488
4489 if (ifmgd->assoc_data) {
4490 err = -EBUSY;
4491 goto err_free;
4492 }
4493
4494 if (ifmgd->auth_data) {
4495 bool match;
4496
4497 /* keep sta info, bssid if matching */
4498 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4499 ieee80211_destroy_auth_data(sdata, match);
4500 }
4501
4502 /* prepare assoc data */
4503
4504 ifmgd->beacon_crc_valid = false;
4505
4506 assoc_data->wmm = bss->wmm_used &&
4507 (local->hw.queues >= IEEE80211_NUM_ACS);
4508 if (assoc_data->wmm) {
4509 /* try to check validity of WMM params IE */
4510 const struct cfg80211_bss_ies *ies;
4511 const u8 *wp, *start, *end;
4512
4513 rcu_read_lock();
4514 ies = rcu_dereference(req->bss->ies);
4515 start = ies->data;
4516 end = start + ies->len;
4517
4518 while (true) {
4519 wp = cfg80211_find_vendor_ie(
4520 WLAN_OUI_MICROSOFT,
4521 WLAN_OUI_TYPE_MICROSOFT_WMM,
4522 start, end - start);
4523 if (!wp)
4524 break;
4525 start = wp + wp[1] + 2;
4526 /* if this IE is too short, try the next */
4527 if (wp[1] <= 4)
4528 continue;
4529 /* if this IE is WMM params, we found what we wanted */
4530 if (wp[6] == 1)
4531 break;
4532 }
4533
4534 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4535 wp[1] - 2)) {
4536 assoc_data->wmm = false;
4537 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4538 }
4539 rcu_read_unlock();
4540 }
4541
4542 /*
4543 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4544 * We still associate in non-HT mode (11a/b/g) if any one of these
4545 * ciphers is configured as pairwise.
4546 * We can set this to true for non-11n hardware, that'll be checked
4547 * separately along with the peer capabilities.
4548 */
4549 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4550 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4551 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4552 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4553 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4554 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4555 netdev_info(sdata->dev,
4556 "disabling HT/VHT due to WEP/TKIP use\n");
4557 }
4558 }
4559
4560 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4561 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4562 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4563 }
4564
4565 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4566 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4567
4568 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4569 sband = local->hw.wiphy->bands[req->bss->channel->band];
4570 if (!sband->ht_cap.ht_supported ||
4571 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4572 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4573 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4574 if (!bss->wmm_used &&
4575 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4576 netdev_info(sdata->dev,
4577 "disabling HT as WMM/QoS is not supported by the AP\n");
4578 }
4579
4580 /* disable VHT if we don't support it or the AP doesn't use WMM */
4581 if (!sband->vht_cap.vht_supported ||
4582 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4583 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4584 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4585 if (!bss->wmm_used &&
4586 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4587 netdev_info(sdata->dev,
4588 "disabling VHT as WMM/QoS is not supported by the AP\n");
4589 }
4590
4591 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4592 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4593 sizeof(ifmgd->ht_capa_mask));
4594
4595 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4596 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4597 sizeof(ifmgd->vht_capa_mask));
4598
4599 if (req->ie && req->ie_len) {
4600 memcpy(assoc_data->ie, req->ie, req->ie_len);
4601 assoc_data->ie_len = req->ie_len;
4602 }
4603
4604 assoc_data->bss = req->bss;
4605
4606 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4607 if (ifmgd->powersave)
4608 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4609 else
4610 sdata->smps_mode = IEEE80211_SMPS_OFF;
4611 } else
4612 sdata->smps_mode = ifmgd->req_smps;
4613
4614 assoc_data->capability = req->bss->capability;
4615 assoc_data->supp_rates = bss->supp_rates;
4616 assoc_data->supp_rates_len = bss->supp_rates_len;
4617
4618 rcu_read_lock();
4619 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4620 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4621 assoc_data->ap_ht_param =
4622 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4623 else
4624 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4625 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4626 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4627 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4628 sizeof(struct ieee80211_vht_cap));
4629 else
4630 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4631 rcu_read_unlock();
4632
4633 if (bss->wmm_used && bss->uapsd_supported &&
4634 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
4635 assoc_data->uapsd = true;
4636 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4637 } else {
4638 assoc_data->uapsd = false;
4639 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4640 }
4641
4642 if (req->prev_bssid)
4643 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4644
4645 if (req->use_mfp) {
4646 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4647 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4648 } else {
4649 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4650 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4651 }
4652
4653 if (req->flags & ASSOC_REQ_USE_RRM)
4654 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4655 else
4656 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4657
4658 if (req->crypto.control_port)
4659 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4660 else
4661 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4662
4663 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4664 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4665 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4666 sdata->vif.type);
4667
4668 /* kick off associate process */
4669
4670 ifmgd->assoc_data = assoc_data;
4671 ifmgd->dtim_period = 0;
4672 ifmgd->have_beacon = false;
4673
4674 err = ieee80211_prep_connection(sdata, req->bss, true);
4675 if (err)
4676 goto err_clear;
4677
4678 rcu_read_lock();
4679 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4680
4681 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4682 !beacon_ies) {
4683 /*
4684 * Wait up to one beacon interval ...
4685 * should this be more if we miss one?
4686 */
4687 sdata_info(sdata, "waiting for beacon from %pM\n",
4688 ifmgd->bssid);
4689 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4690 assoc_data->timeout_started = true;
4691 assoc_data->need_beacon = true;
4692 } else if (beacon_ies) {
4693 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4694 beacon_ies->data,
4695 beacon_ies->len);
4696 u8 dtim_count = 0;
4697
4698 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4699 const struct ieee80211_tim_ie *tim;
4700 tim = (void *)(tim_ie + 2);
4701 ifmgd->dtim_period = tim->dtim_period;
4702 dtim_count = tim->dtim_count;
4703 }
4704 ifmgd->have_beacon = true;
4705 assoc_data->timeout = jiffies;
4706 assoc_data->timeout_started = true;
4707
4708 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4709 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4710 sdata->vif.bss_conf.sync_device_ts =
4711 bss->device_ts_beacon;
4712 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4713 }
4714 } else {
4715 assoc_data->timeout = jiffies;
4716 assoc_data->timeout_started = true;
4717 }
4718 rcu_read_unlock();
4719
4720 run_again(sdata, assoc_data->timeout);
4721
4722 if (bss->corrupt_data) {
4723 char *corrupt_type = "data";
4724 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4725 if (bss->corrupt_data &
4726 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4727 corrupt_type = "beacon and probe response";
4728 else
4729 corrupt_type = "beacon";
4730 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4731 corrupt_type = "probe response";
4732 sdata_info(sdata, "associating with AP with corrupt %s\n",
4733 corrupt_type);
4734 }
4735
4736 return 0;
4737 err_clear:
4738 memset(ifmgd->bssid, 0, ETH_ALEN);
4739 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4740 ifmgd->assoc_data = NULL;
4741 err_free:
4742 kfree(assoc_data);
4743 return err;
4744 }
4745
4746 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4747 struct cfg80211_deauth_request *req)
4748 {
4749 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4750 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4751 bool tx = !req->local_state_change;
4752
4753 if (ifmgd->auth_data &&
4754 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4755 sdata_info(sdata,
4756 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4757 req->bssid, req->reason_code,
4758 ieee80211_get_reason_code_string(req->reason_code));
4759
4760 drv_mgd_prepare_tx(sdata->local, sdata);
4761 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4762 IEEE80211_STYPE_DEAUTH,
4763 req->reason_code, tx,
4764 frame_buf);
4765 ieee80211_destroy_auth_data(sdata, false);
4766 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4767 IEEE80211_DEAUTH_FRAME_LEN);
4768
4769 return 0;
4770 }
4771
4772 if (ifmgd->associated &&
4773 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4774 sdata_info(sdata,
4775 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4776 req->bssid, req->reason_code,
4777 ieee80211_get_reason_code_string(req->reason_code));
4778
4779 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4780 req->reason_code, tx, frame_buf);
4781 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4782 IEEE80211_DEAUTH_FRAME_LEN);
4783 return 0;
4784 }
4785
4786 return -ENOTCONN;
4787 }
4788
4789 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4790 struct cfg80211_disassoc_request *req)
4791 {
4792 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4793 u8 bssid[ETH_ALEN];
4794 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4795
4796 /*
4797 * cfg80211 should catch this ... but it's racy since
4798 * we can receive a disassoc frame, process it, hand it
4799 * to cfg80211 while that's in a locked section already
4800 * trying to tell us that the user wants to disconnect.
4801 */
4802 if (ifmgd->associated != req->bss)
4803 return -ENOLINK;
4804
4805 sdata_info(sdata,
4806 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4807 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4808
4809 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4810 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4811 req->reason_code, !req->local_state_change,
4812 frame_buf);
4813
4814 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4815 IEEE80211_DEAUTH_FRAME_LEN);
4816
4817 return 0;
4818 }
4819
4820 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4821 {
4822 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4823
4824 /*
4825 * Make sure some work items will not run after this,
4826 * they will not do anything but might not have been
4827 * cancelled when disconnecting.
4828 */
4829 cancel_work_sync(&ifmgd->monitor_work);
4830 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4831 cancel_work_sync(&ifmgd->request_smps_work);
4832 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4833 cancel_work_sync(&ifmgd->chswitch_work);
4834 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4835
4836 sdata_lock(sdata);
4837 if (ifmgd->assoc_data) {
4838 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4839 ieee80211_destroy_assoc_data(sdata, false);
4840 cfg80211_assoc_timeout(sdata->dev, bss);
4841 }
4842 if (ifmgd->auth_data)
4843 ieee80211_destroy_auth_data(sdata, false);
4844 del_timer_sync(&ifmgd->timer);
4845 sdata_unlock(sdata);
4846 }
4847
4848 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4849 enum nl80211_cqm_rssi_threshold_event rssi_event,
4850 gfp_t gfp)
4851 {
4852 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4853
4854 trace_api_cqm_rssi_notify(sdata, rssi_event);
4855
4856 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4857 }
4858 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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