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mac80211: allow channel switch with multiple channel contexts
[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 /* MLME */
1610 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1611 struct ieee80211_sub_if_data *sdata,
1612 const u8 *wmm_param, size_t wmm_param_len)
1613 {
1614 struct ieee80211_tx_queue_params params;
1615 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1616 size_t left;
1617 int count;
1618 const u8 *pos;
1619 u8 uapsd_queues = 0;
1620
1621 if (!local->ops->conf_tx)
1622 return false;
1623
1624 if (local->hw.queues < IEEE80211_NUM_ACS)
1625 return false;
1626
1627 if (!wmm_param)
1628 return false;
1629
1630 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1631 return false;
1632
1633 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1634 uapsd_queues = ifmgd->uapsd_queues;
1635
1636 count = wmm_param[6] & 0x0f;
1637 if (count == ifmgd->wmm_last_param_set)
1638 return false;
1639 ifmgd->wmm_last_param_set = count;
1640
1641 pos = wmm_param + 8;
1642 left = wmm_param_len - 8;
1643
1644 memset(&params, 0, sizeof(params));
1645
1646 sdata->wmm_acm = 0;
1647 for (; left >= 4; left -= 4, pos += 4) {
1648 int aci = (pos[0] >> 5) & 0x03;
1649 int acm = (pos[0] >> 4) & 0x01;
1650 bool uapsd = false;
1651 int queue;
1652
1653 switch (aci) {
1654 case 1: /* AC_BK */
1655 queue = 3;
1656 if (acm)
1657 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1658 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1659 uapsd = true;
1660 break;
1661 case 2: /* AC_VI */
1662 queue = 1;
1663 if (acm)
1664 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1665 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1666 uapsd = true;
1667 break;
1668 case 3: /* AC_VO */
1669 queue = 0;
1670 if (acm)
1671 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1672 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1673 uapsd = true;
1674 break;
1675 case 0: /* AC_BE */
1676 default:
1677 queue = 2;
1678 if (acm)
1679 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1680 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1681 uapsd = true;
1682 break;
1683 }
1684
1685 params.aifs = pos[0] & 0x0f;
1686 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1687 params.cw_min = ecw2cw(pos[1] & 0x0f);
1688 params.txop = get_unaligned_le16(pos + 2);
1689 params.acm = acm;
1690 params.uapsd = uapsd;
1691
1692 mlme_dbg(sdata,
1693 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1694 queue, aci, acm,
1695 params.aifs, params.cw_min, params.cw_max,
1696 params.txop, params.uapsd);
1697 sdata->tx_conf[queue] = params;
1698 if (drv_conf_tx(local, sdata, queue, &params))
1699 sdata_err(sdata,
1700 "failed to set TX queue parameters for queue %d\n",
1701 queue);
1702 }
1703
1704 /* enable WMM or activate new settings */
1705 sdata->vif.bss_conf.qos = true;
1706 return true;
1707 }
1708
1709 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1710 {
1711 lockdep_assert_held(&sdata->local->mtx);
1712
1713 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1714 ieee80211_run_deferred_scan(sdata->local);
1715 }
1716
1717 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1718 {
1719 mutex_lock(&sdata->local->mtx);
1720 __ieee80211_stop_poll(sdata);
1721 mutex_unlock(&sdata->local->mtx);
1722 }
1723
1724 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1725 u16 capab, bool erp_valid, u8 erp)
1726 {
1727 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1728 u32 changed = 0;
1729 bool use_protection;
1730 bool use_short_preamble;
1731 bool use_short_slot;
1732
1733 if (erp_valid) {
1734 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1735 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1736 } else {
1737 use_protection = false;
1738 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1739 }
1740
1741 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1742 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1743 use_short_slot = true;
1744
1745 if (use_protection != bss_conf->use_cts_prot) {
1746 bss_conf->use_cts_prot = use_protection;
1747 changed |= BSS_CHANGED_ERP_CTS_PROT;
1748 }
1749
1750 if (use_short_preamble != bss_conf->use_short_preamble) {
1751 bss_conf->use_short_preamble = use_short_preamble;
1752 changed |= BSS_CHANGED_ERP_PREAMBLE;
1753 }
1754
1755 if (use_short_slot != bss_conf->use_short_slot) {
1756 bss_conf->use_short_slot = use_short_slot;
1757 changed |= BSS_CHANGED_ERP_SLOT;
1758 }
1759
1760 return changed;
1761 }
1762
1763 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1764 struct cfg80211_bss *cbss,
1765 u32 bss_info_changed)
1766 {
1767 struct ieee80211_bss *bss = (void *)cbss->priv;
1768 struct ieee80211_local *local = sdata->local;
1769 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1770
1771 bss_info_changed |= BSS_CHANGED_ASSOC;
1772 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1773 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1774
1775 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1776 beacon_loss_count * bss_conf->beacon_int));
1777
1778 sdata->u.mgd.associated = cbss;
1779 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1780
1781 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1782
1783 if (sdata->vif.p2p) {
1784 const struct cfg80211_bss_ies *ies;
1785
1786 rcu_read_lock();
1787 ies = rcu_dereference(cbss->ies);
1788 if (ies) {
1789 int ret;
1790
1791 ret = cfg80211_get_p2p_attr(
1792 ies->data, ies->len,
1793 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1794 (u8 *) &bss_conf->p2p_noa_attr,
1795 sizeof(bss_conf->p2p_noa_attr));
1796 if (ret >= 2) {
1797 sdata->u.mgd.p2p_noa_index =
1798 bss_conf->p2p_noa_attr.index;
1799 bss_info_changed |= BSS_CHANGED_P2P_PS;
1800 }
1801 }
1802 rcu_read_unlock();
1803 }
1804
1805 /* just to be sure */
1806 ieee80211_stop_poll(sdata);
1807
1808 ieee80211_led_assoc(local, 1);
1809
1810 if (sdata->u.mgd.have_beacon) {
1811 /*
1812 * If the AP is buggy we may get here with no DTIM period
1813 * known, so assume it's 1 which is the only safe assumption
1814 * in that case, although if the TIM IE is broken powersave
1815 * probably just won't work at all.
1816 */
1817 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1818 bss_conf->beacon_rate = bss->beacon_rate;
1819 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1820 } else {
1821 bss_conf->beacon_rate = NULL;
1822 bss_conf->dtim_period = 0;
1823 }
1824
1825 bss_conf->assoc = 1;
1826
1827 /* Tell the driver to monitor connection quality (if supported) */
1828 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1829 bss_conf->cqm_rssi_thold)
1830 bss_info_changed |= BSS_CHANGED_CQM;
1831
1832 /* Enable ARP filtering */
1833 if (bss_conf->arp_addr_cnt)
1834 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1835
1836 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1837
1838 mutex_lock(&local->iflist_mtx);
1839 ieee80211_recalc_ps(local, -1);
1840 mutex_unlock(&local->iflist_mtx);
1841
1842 ieee80211_recalc_smps(sdata);
1843 ieee80211_recalc_ps_vif(sdata);
1844
1845 netif_carrier_on(sdata->dev);
1846 }
1847
1848 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1849 u16 stype, u16 reason, bool tx,
1850 u8 *frame_buf)
1851 {
1852 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1853 struct ieee80211_local *local = sdata->local;
1854 u32 changed = 0;
1855
1856 sdata_assert_lock(sdata);
1857
1858 if (WARN_ON_ONCE(tx && !frame_buf))
1859 return;
1860
1861 if (WARN_ON(!ifmgd->associated))
1862 return;
1863
1864 ieee80211_stop_poll(sdata);
1865
1866 ifmgd->associated = NULL;
1867 netif_carrier_off(sdata->dev);
1868
1869 /*
1870 * if we want to get out of ps before disassoc (why?) we have
1871 * to do it before sending disassoc, as otherwise the null-packet
1872 * won't be valid.
1873 */
1874 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1875 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1876 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1877 }
1878 local->ps_sdata = NULL;
1879
1880 /* disable per-vif ps */
1881 ieee80211_recalc_ps_vif(sdata);
1882
1883 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1884 if (tx)
1885 ieee80211_flush_queues(local, sdata);
1886
1887 /* deauthenticate/disassociate now */
1888 if (tx || frame_buf)
1889 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1890 reason, tx, frame_buf);
1891
1892 /* flush out frame */
1893 if (tx)
1894 ieee80211_flush_queues(local, sdata);
1895
1896 /* clear bssid only after building the needed mgmt frames */
1897 memset(ifmgd->bssid, 0, ETH_ALEN);
1898
1899 /* remove AP and TDLS peers */
1900 sta_info_flush(sdata);
1901
1902 /* finally reset all BSS / config parameters */
1903 changed |= ieee80211_reset_erp_info(sdata);
1904
1905 ieee80211_led_assoc(local, 0);
1906 changed |= BSS_CHANGED_ASSOC;
1907 sdata->vif.bss_conf.assoc = false;
1908
1909 ifmgd->p2p_noa_index = -1;
1910 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1911 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1912
1913 /* on the next assoc, re-program HT/VHT parameters */
1914 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1915 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1916 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1917 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1918
1919 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1920
1921 del_timer_sync(&local->dynamic_ps_timer);
1922 cancel_work_sync(&local->dynamic_ps_enable_work);
1923
1924 /* Disable ARP filtering */
1925 if (sdata->vif.bss_conf.arp_addr_cnt)
1926 changed |= BSS_CHANGED_ARP_FILTER;
1927
1928 sdata->vif.bss_conf.qos = false;
1929 changed |= BSS_CHANGED_QOS;
1930
1931 /* The BSSID (not really interesting) and HT changed */
1932 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1933 ieee80211_bss_info_change_notify(sdata, changed);
1934
1935 /* disassociated - set to defaults now */
1936 ieee80211_set_wmm_default(sdata, false);
1937
1938 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1939 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1940 del_timer_sync(&sdata->u.mgd.timer);
1941 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1942
1943 sdata->vif.bss_conf.dtim_period = 0;
1944 sdata->vif.bss_conf.beacon_rate = NULL;
1945
1946 ifmgd->have_beacon = false;
1947
1948 ifmgd->flags = 0;
1949 mutex_lock(&local->mtx);
1950 ieee80211_vif_release_channel(sdata);
1951
1952 sdata->vif.csa_active = false;
1953 ifmgd->csa_waiting_bcn = false;
1954 if (sdata->csa_block_tx) {
1955 ieee80211_wake_vif_queues(local, sdata,
1956 IEEE80211_QUEUE_STOP_REASON_CSA);
1957 sdata->csa_block_tx = false;
1958 }
1959 mutex_unlock(&local->mtx);
1960
1961 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1962 }
1963
1964 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1965 struct ieee80211_hdr *hdr)
1966 {
1967 /*
1968 * We can postpone the mgd.timer whenever receiving unicast frames
1969 * from AP because we know that the connection is working both ways
1970 * at that time. But multicast frames (and hence also beacons) must
1971 * be ignored here, because we need to trigger the timer during
1972 * data idle periods for sending the periodic probe request to the
1973 * AP we're connected to.
1974 */
1975 if (is_multicast_ether_addr(hdr->addr1))
1976 return;
1977
1978 ieee80211_sta_reset_conn_monitor(sdata);
1979 }
1980
1981 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1982 {
1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984 struct ieee80211_local *local = sdata->local;
1985
1986 mutex_lock(&local->mtx);
1987 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1988 goto out;
1989
1990 __ieee80211_stop_poll(sdata);
1991
1992 mutex_lock(&local->iflist_mtx);
1993 ieee80211_recalc_ps(local, -1);
1994 mutex_unlock(&local->iflist_mtx);
1995
1996 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1997 goto out;
1998
1999 /*
2000 * We've received a probe response, but are not sure whether
2001 * we have or will be receiving any beacons or data, so let's
2002 * schedule the timers again, just in case.
2003 */
2004 ieee80211_sta_reset_beacon_monitor(sdata);
2005
2006 mod_timer(&ifmgd->conn_mon_timer,
2007 round_jiffies_up(jiffies +
2008 IEEE80211_CONNECTION_IDLE_TIME));
2009 out:
2010 mutex_unlock(&local->mtx);
2011 }
2012
2013 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2014 struct ieee80211_hdr *hdr, bool ack)
2015 {
2016 if (!ieee80211_is_data(hdr->frame_control))
2017 return;
2018
2019 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2020 sdata->u.mgd.probe_send_count > 0) {
2021 if (ack)
2022 ieee80211_sta_reset_conn_monitor(sdata);
2023 else
2024 sdata->u.mgd.nullfunc_failed = true;
2025 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2026 return;
2027 }
2028
2029 if (ack)
2030 ieee80211_sta_reset_conn_monitor(sdata);
2031 }
2032
2033 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2034 {
2035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2036 const u8 *ssid;
2037 u8 *dst = ifmgd->associated->bssid;
2038 u8 unicast_limit = max(1, max_probe_tries - 3);
2039
2040 /*
2041 * Try sending broadcast probe requests for the last three
2042 * probe requests after the first ones failed since some
2043 * buggy APs only support broadcast probe requests.
2044 */
2045 if (ifmgd->probe_send_count >= unicast_limit)
2046 dst = NULL;
2047
2048 /*
2049 * When the hardware reports an accurate Tx ACK status, it's
2050 * better to send a nullfunc frame instead of a probe request,
2051 * as it will kick us off the AP quickly if we aren't associated
2052 * anymore. The timeout will be reset if the frame is ACKed by
2053 * the AP.
2054 */
2055 ifmgd->probe_send_count++;
2056
2057 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2058 ifmgd->nullfunc_failed = false;
2059 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2060 } else {
2061 int ssid_len;
2062
2063 rcu_read_lock();
2064 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2065 if (WARN_ON_ONCE(ssid == NULL))
2066 ssid_len = 0;
2067 else
2068 ssid_len = ssid[1];
2069
2070 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2071 0, (u32) -1, true, 0,
2072 ifmgd->associated->channel, false);
2073 rcu_read_unlock();
2074 }
2075
2076 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2077 run_again(sdata, ifmgd->probe_timeout);
2078 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2079 ieee80211_flush_queues(sdata->local, sdata);
2080 }
2081
2082 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2083 bool beacon)
2084 {
2085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2086 bool already = false;
2087
2088 if (!ieee80211_sdata_running(sdata))
2089 return;
2090
2091 sdata_lock(sdata);
2092
2093 if (!ifmgd->associated)
2094 goto out;
2095
2096 mutex_lock(&sdata->local->mtx);
2097
2098 if (sdata->local->tmp_channel || sdata->local->scanning) {
2099 mutex_unlock(&sdata->local->mtx);
2100 goto out;
2101 }
2102
2103 if (beacon) {
2104 mlme_dbg_ratelimited(sdata,
2105 "detected beacon loss from AP (missed %d beacons) - probing\n",
2106 beacon_loss_count);
2107
2108 ieee80211_cqm_rssi_notify(&sdata->vif,
2109 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2110 GFP_KERNEL);
2111 }
2112
2113 /*
2114 * The driver/our work has already reported this event or the
2115 * connection monitoring has kicked in and we have already sent
2116 * a probe request. Or maybe the AP died and the driver keeps
2117 * reporting until we disassociate...
2118 *
2119 * In either case we have to ignore the current call to this
2120 * function (except for setting the correct probe reason bit)
2121 * because otherwise we would reset the timer every time and
2122 * never check whether we received a probe response!
2123 */
2124 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2125 already = true;
2126
2127 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2128
2129 mutex_unlock(&sdata->local->mtx);
2130
2131 if (already)
2132 goto out;
2133
2134 mutex_lock(&sdata->local->iflist_mtx);
2135 ieee80211_recalc_ps(sdata->local, -1);
2136 mutex_unlock(&sdata->local->iflist_mtx);
2137
2138 ifmgd->probe_send_count = 0;
2139 ieee80211_mgd_probe_ap_send(sdata);
2140 out:
2141 sdata_unlock(sdata);
2142 }
2143
2144 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2145 struct ieee80211_vif *vif)
2146 {
2147 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2149 struct cfg80211_bss *cbss;
2150 struct sk_buff *skb;
2151 const u8 *ssid;
2152 int ssid_len;
2153
2154 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2155 return NULL;
2156
2157 sdata_assert_lock(sdata);
2158
2159 if (ifmgd->associated)
2160 cbss = ifmgd->associated;
2161 else if (ifmgd->auth_data)
2162 cbss = ifmgd->auth_data->bss;
2163 else if (ifmgd->assoc_data)
2164 cbss = ifmgd->assoc_data->bss;
2165 else
2166 return NULL;
2167
2168 rcu_read_lock();
2169 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2170 if (WARN_ON_ONCE(ssid == NULL))
2171 ssid_len = 0;
2172 else
2173 ssid_len = ssid[1];
2174
2175 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2176 (u32) -1, cbss->channel,
2177 ssid + 2, ssid_len,
2178 NULL, 0, true);
2179 rcu_read_unlock();
2180
2181 return skb;
2182 }
2183 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2184
2185 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2186 {
2187 struct ieee80211_local *local = sdata->local;
2188 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2189 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2190
2191 sdata_lock(sdata);
2192 if (!ifmgd->associated) {
2193 sdata_unlock(sdata);
2194 return;
2195 }
2196
2197 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2198 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2199 true, frame_buf);
2200 mutex_lock(&local->mtx);
2201 sdata->vif.csa_active = false;
2202 ifmgd->csa_waiting_bcn = false;
2203 if (sdata->csa_block_tx) {
2204 ieee80211_wake_vif_queues(local, sdata,
2205 IEEE80211_QUEUE_STOP_REASON_CSA);
2206 sdata->csa_block_tx = false;
2207 }
2208 mutex_unlock(&local->mtx);
2209
2210 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2211 IEEE80211_DEAUTH_FRAME_LEN);
2212 sdata_unlock(sdata);
2213 }
2214
2215 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2216 {
2217 struct ieee80211_sub_if_data *sdata =
2218 container_of(work, struct ieee80211_sub_if_data,
2219 u.mgd.beacon_connection_loss_work);
2220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2221 struct sta_info *sta;
2222
2223 if (ifmgd->associated) {
2224 rcu_read_lock();
2225 sta = sta_info_get(sdata, ifmgd->bssid);
2226 if (sta)
2227 sta->beacon_loss_count++;
2228 rcu_read_unlock();
2229 }
2230
2231 if (ifmgd->connection_loss) {
2232 sdata_info(sdata, "Connection to AP %pM lost\n",
2233 ifmgd->bssid);
2234 __ieee80211_disconnect(sdata);
2235 } else {
2236 ieee80211_mgd_probe_ap(sdata, true);
2237 }
2238 }
2239
2240 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2241 {
2242 struct ieee80211_sub_if_data *sdata =
2243 container_of(work, struct ieee80211_sub_if_data,
2244 u.mgd.csa_connection_drop_work);
2245
2246 __ieee80211_disconnect(sdata);
2247 }
2248
2249 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2250 {
2251 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2252 struct ieee80211_hw *hw = &sdata->local->hw;
2253
2254 trace_api_beacon_loss(sdata);
2255
2256 sdata->u.mgd.connection_loss = false;
2257 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2258 }
2259 EXPORT_SYMBOL(ieee80211_beacon_loss);
2260
2261 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2262 {
2263 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2264 struct ieee80211_hw *hw = &sdata->local->hw;
2265
2266 trace_api_connection_loss(sdata);
2267
2268 sdata->u.mgd.connection_loss = true;
2269 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2270 }
2271 EXPORT_SYMBOL(ieee80211_connection_loss);
2272
2273
2274 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2275 bool assoc)
2276 {
2277 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2278
2279 sdata_assert_lock(sdata);
2280
2281 if (!assoc) {
2282 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2283
2284 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2285 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2286 sdata->u.mgd.flags = 0;
2287 mutex_lock(&sdata->local->mtx);
2288 ieee80211_vif_release_channel(sdata);
2289 mutex_unlock(&sdata->local->mtx);
2290 }
2291
2292 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2293 kfree(auth_data);
2294 sdata->u.mgd.auth_data = NULL;
2295 }
2296
2297 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2298 struct ieee80211_mgmt *mgmt, size_t len)
2299 {
2300 struct ieee80211_local *local = sdata->local;
2301 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2302 u8 *pos;
2303 struct ieee802_11_elems elems;
2304 u32 tx_flags = 0;
2305
2306 pos = mgmt->u.auth.variable;
2307 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2308 if (!elems.challenge)
2309 return;
2310 auth_data->expected_transaction = 4;
2311 drv_mgd_prepare_tx(sdata->local, sdata);
2312 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2313 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2314 IEEE80211_TX_INTFL_MLME_CONN_TX;
2315 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2316 elems.challenge - 2, elems.challenge_len + 2,
2317 auth_data->bss->bssid, auth_data->bss->bssid,
2318 auth_data->key, auth_data->key_len,
2319 auth_data->key_idx, tx_flags);
2320 }
2321
2322 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2323 struct ieee80211_mgmt *mgmt, size_t len)
2324 {
2325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2326 u8 bssid[ETH_ALEN];
2327 u16 auth_alg, auth_transaction, status_code;
2328 struct sta_info *sta;
2329
2330 sdata_assert_lock(sdata);
2331
2332 if (len < 24 + 6)
2333 return;
2334
2335 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2336 return;
2337
2338 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2339
2340 if (!ether_addr_equal(bssid, mgmt->bssid))
2341 return;
2342
2343 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2344 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2345 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2346
2347 if (auth_alg != ifmgd->auth_data->algorithm ||
2348 auth_transaction != ifmgd->auth_data->expected_transaction) {
2349 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2350 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2351 auth_transaction,
2352 ifmgd->auth_data->expected_transaction);
2353 return;
2354 }
2355
2356 if (status_code != WLAN_STATUS_SUCCESS) {
2357 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2358 mgmt->sa, status_code);
2359 ieee80211_destroy_auth_data(sdata, false);
2360 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2361 return;
2362 }
2363
2364 switch (ifmgd->auth_data->algorithm) {
2365 case WLAN_AUTH_OPEN:
2366 case WLAN_AUTH_LEAP:
2367 case WLAN_AUTH_FT:
2368 case WLAN_AUTH_SAE:
2369 break;
2370 case WLAN_AUTH_SHARED_KEY:
2371 if (ifmgd->auth_data->expected_transaction != 4) {
2372 ieee80211_auth_challenge(sdata, mgmt, len);
2373 /* need another frame */
2374 return;
2375 }
2376 break;
2377 default:
2378 WARN_ONCE(1, "invalid auth alg %d",
2379 ifmgd->auth_data->algorithm);
2380 return;
2381 }
2382
2383 sdata_info(sdata, "authenticated\n");
2384 ifmgd->auth_data->done = true;
2385 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2386 ifmgd->auth_data->timeout_started = true;
2387 run_again(sdata, ifmgd->auth_data->timeout);
2388
2389 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2390 ifmgd->auth_data->expected_transaction != 2) {
2391 /*
2392 * Report auth frame to user space for processing since another
2393 * round of Authentication frames is still needed.
2394 */
2395 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2396 return;
2397 }
2398
2399 /* move station state to auth */
2400 mutex_lock(&sdata->local->sta_mtx);
2401 sta = sta_info_get(sdata, bssid);
2402 if (!sta) {
2403 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2404 goto out_err;
2405 }
2406 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2407 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2408 goto out_err;
2409 }
2410 mutex_unlock(&sdata->local->sta_mtx);
2411
2412 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2413 return;
2414 out_err:
2415 mutex_unlock(&sdata->local->sta_mtx);
2416 /* ignore frame -- wait for timeout */
2417 }
2418
2419 #define case_WLAN(type) \
2420 case WLAN_REASON_##type: return #type
2421
2422 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2423 {
2424 switch (reason_code) {
2425 case_WLAN(UNSPECIFIED);
2426 case_WLAN(PREV_AUTH_NOT_VALID);
2427 case_WLAN(DEAUTH_LEAVING);
2428 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2429 case_WLAN(DISASSOC_AP_BUSY);
2430 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2431 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2432 case_WLAN(DISASSOC_STA_HAS_LEFT);
2433 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2434 case_WLAN(DISASSOC_BAD_POWER);
2435 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2436 case_WLAN(INVALID_IE);
2437 case_WLAN(MIC_FAILURE);
2438 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2439 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2440 case_WLAN(IE_DIFFERENT);
2441 case_WLAN(INVALID_GROUP_CIPHER);
2442 case_WLAN(INVALID_PAIRWISE_CIPHER);
2443 case_WLAN(INVALID_AKMP);
2444 case_WLAN(UNSUPP_RSN_VERSION);
2445 case_WLAN(INVALID_RSN_IE_CAP);
2446 case_WLAN(IEEE8021X_FAILED);
2447 case_WLAN(CIPHER_SUITE_REJECTED);
2448 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2449 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2450 case_WLAN(DISASSOC_LOW_ACK);
2451 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2452 case_WLAN(QSTA_LEAVE_QBSS);
2453 case_WLAN(QSTA_NOT_USE);
2454 case_WLAN(QSTA_REQUIRE_SETUP);
2455 case_WLAN(QSTA_TIMEOUT);
2456 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2457 case_WLAN(MESH_PEER_CANCELED);
2458 case_WLAN(MESH_MAX_PEERS);
2459 case_WLAN(MESH_CONFIG);
2460 case_WLAN(MESH_CLOSE);
2461 case_WLAN(MESH_MAX_RETRIES);
2462 case_WLAN(MESH_CONFIRM_TIMEOUT);
2463 case_WLAN(MESH_INVALID_GTK);
2464 case_WLAN(MESH_INCONSISTENT_PARAM);
2465 case_WLAN(MESH_INVALID_SECURITY);
2466 case_WLAN(MESH_PATH_ERROR);
2467 case_WLAN(MESH_PATH_NOFORWARD);
2468 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2469 case_WLAN(MAC_EXISTS_IN_MBSS);
2470 case_WLAN(MESH_CHAN_REGULATORY);
2471 case_WLAN(MESH_CHAN);
2472 default: return "<unknown>";
2473 }
2474 }
2475
2476 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2477 struct ieee80211_mgmt *mgmt, size_t len)
2478 {
2479 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2480 const u8 *bssid = NULL;
2481 u16 reason_code;
2482
2483 sdata_assert_lock(sdata);
2484
2485 if (len < 24 + 2)
2486 return;
2487
2488 if (!ifmgd->associated ||
2489 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2490 return;
2491
2492 bssid = ifmgd->associated->bssid;
2493
2494 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2495
2496 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2497 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2498
2499 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2500
2501 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2502 }
2503
2504
2505 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2506 struct ieee80211_mgmt *mgmt, size_t len)
2507 {
2508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2509 u16 reason_code;
2510
2511 sdata_assert_lock(sdata);
2512
2513 if (len < 24 + 2)
2514 return;
2515
2516 if (!ifmgd->associated ||
2517 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2518 return;
2519
2520 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2521
2522 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2523 mgmt->sa, reason_code);
2524
2525 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2526
2527 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2528 }
2529
2530 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2531 u8 *supp_rates, unsigned int supp_rates_len,
2532 u32 *rates, u32 *basic_rates,
2533 bool *have_higher_than_11mbit,
2534 int *min_rate, int *min_rate_index,
2535 int shift, u32 rate_flags)
2536 {
2537 int i, j;
2538
2539 for (i = 0; i < supp_rates_len; i++) {
2540 int rate = supp_rates[i] & 0x7f;
2541 bool is_basic = !!(supp_rates[i] & 0x80);
2542
2543 if ((rate * 5 * (1 << shift)) > 110)
2544 *have_higher_than_11mbit = true;
2545
2546 /*
2547 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2548 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2549 *
2550 * Note: Even through the membership selector and the basic
2551 * rate flag share the same bit, they are not exactly
2552 * the same.
2553 */
2554 if (!!(supp_rates[i] & 0x80) &&
2555 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2556 continue;
2557
2558 for (j = 0; j < sband->n_bitrates; j++) {
2559 struct ieee80211_rate *br;
2560 int brate;
2561
2562 br = &sband->bitrates[j];
2563 if ((rate_flags & br->flags) != rate_flags)
2564 continue;
2565
2566 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2567 if (brate == rate) {
2568 *rates |= BIT(j);
2569 if (is_basic)
2570 *basic_rates |= BIT(j);
2571 if ((rate * 5) < *min_rate) {
2572 *min_rate = rate * 5;
2573 *min_rate_index = j;
2574 }
2575 break;
2576 }
2577 }
2578 }
2579 }
2580
2581 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2582 bool assoc)
2583 {
2584 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2585
2586 sdata_assert_lock(sdata);
2587
2588 if (!assoc) {
2589 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2590
2591 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2592 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2593 sdata->u.mgd.flags = 0;
2594 mutex_lock(&sdata->local->mtx);
2595 ieee80211_vif_release_channel(sdata);
2596 mutex_unlock(&sdata->local->mtx);
2597 }
2598
2599 kfree(assoc_data);
2600 sdata->u.mgd.assoc_data = NULL;
2601 }
2602
2603 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2604 struct cfg80211_bss *cbss,
2605 struct ieee80211_mgmt *mgmt, size_t len)
2606 {
2607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2608 struct ieee80211_local *local = sdata->local;
2609 struct ieee80211_supported_band *sband;
2610 struct sta_info *sta;
2611 u8 *pos;
2612 u16 capab_info, aid;
2613 struct ieee802_11_elems elems;
2614 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2615 const struct cfg80211_bss_ies *bss_ies = NULL;
2616 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2617 u32 changed = 0;
2618 int err;
2619 bool ret;
2620
2621 /* AssocResp and ReassocResp have identical structure */
2622
2623 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2624 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2625
2626 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2627 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2628 aid);
2629 aid &= ~(BIT(15) | BIT(14));
2630
2631 ifmgd->broken_ap = false;
2632
2633 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2634 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2635 aid);
2636 aid = 0;
2637 ifmgd->broken_ap = true;
2638 }
2639
2640 pos = mgmt->u.assoc_resp.variable;
2641 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2642
2643 if (!elems.supp_rates) {
2644 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2645 return false;
2646 }
2647
2648 ifmgd->aid = aid;
2649
2650 /*
2651 * Some APs are erroneously not including some information in their
2652 * (re)association response frames. Try to recover by using the data
2653 * from the beacon or probe response. This seems to afflict mobile
2654 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2655 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2656 */
2657 if ((assoc_data->wmm && !elems.wmm_param) ||
2658 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2659 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2660 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2661 (!elems.vht_cap_elem || !elems.vht_operation))) {
2662 const struct cfg80211_bss_ies *ies;
2663 struct ieee802_11_elems bss_elems;
2664
2665 rcu_read_lock();
2666 ies = rcu_dereference(cbss->ies);
2667 if (ies)
2668 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2669 GFP_ATOMIC);
2670 rcu_read_unlock();
2671 if (!bss_ies)
2672 return false;
2673
2674 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2675 false, &bss_elems);
2676 if (assoc_data->wmm &&
2677 !elems.wmm_param && bss_elems.wmm_param) {
2678 elems.wmm_param = bss_elems.wmm_param;
2679 sdata_info(sdata,
2680 "AP bug: WMM param missing from AssocResp\n");
2681 }
2682
2683 /*
2684 * Also check if we requested HT/VHT, otherwise the AP doesn't
2685 * have to include the IEs in the (re)association response.
2686 */
2687 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2688 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2689 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2690 sdata_info(sdata,
2691 "AP bug: HT capability missing from AssocResp\n");
2692 }
2693 if (!elems.ht_operation && bss_elems.ht_operation &&
2694 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2695 elems.ht_operation = bss_elems.ht_operation;
2696 sdata_info(sdata,
2697 "AP bug: HT operation missing from AssocResp\n");
2698 }
2699 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2700 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2701 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2702 sdata_info(sdata,
2703 "AP bug: VHT capa missing from AssocResp\n");
2704 }
2705 if (!elems.vht_operation && bss_elems.vht_operation &&
2706 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2707 elems.vht_operation = bss_elems.vht_operation;
2708 sdata_info(sdata,
2709 "AP bug: VHT operation missing from AssocResp\n");
2710 }
2711 }
2712
2713 /*
2714 * We previously checked these in the beacon/probe response, so
2715 * they should be present here. This is just a safety net.
2716 */
2717 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2718 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2719 sdata_info(sdata,
2720 "HT AP is missing WMM params or HT capability/operation\n");
2721 ret = false;
2722 goto out;
2723 }
2724
2725 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2726 (!elems.vht_cap_elem || !elems.vht_operation)) {
2727 sdata_info(sdata,
2728 "VHT AP is missing VHT capability/operation\n");
2729 ret = false;
2730 goto out;
2731 }
2732
2733 mutex_lock(&sdata->local->sta_mtx);
2734 /*
2735 * station info was already allocated and inserted before
2736 * the association and should be available to us
2737 */
2738 sta = sta_info_get(sdata, cbss->bssid);
2739 if (WARN_ON(!sta)) {
2740 mutex_unlock(&sdata->local->sta_mtx);
2741 ret = false;
2742 goto out;
2743 }
2744
2745 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2746
2747 /* Set up internal HT/VHT capabilities */
2748 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2749 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2750 elems.ht_cap_elem, sta);
2751
2752 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2753 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2754 elems.vht_cap_elem, sta);
2755
2756 /*
2757 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2758 * in their association response, so ignore that data for our own
2759 * configuration. If it changed since the last beacon, we'll get the
2760 * next beacon and update then.
2761 */
2762
2763 /*
2764 * If an operating mode notification IE is present, override the
2765 * NSS calculation (that would be done in rate_control_rate_init())
2766 * and use the # of streams from that element.
2767 */
2768 if (elems.opmode_notif &&
2769 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2770 u8 nss;
2771
2772 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2773 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2774 nss += 1;
2775 sta->sta.rx_nss = nss;
2776 }
2777
2778 rate_control_rate_init(sta);
2779
2780 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2781 set_sta_flag(sta, WLAN_STA_MFP);
2782
2783 sta->sta.wme = elems.wmm_param;
2784
2785 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2786 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2787 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2788 if (err) {
2789 sdata_info(sdata,
2790 "failed to move station %pM to desired state\n",
2791 sta->sta.addr);
2792 WARN_ON(__sta_info_destroy(sta));
2793 mutex_unlock(&sdata->local->sta_mtx);
2794 ret = false;
2795 goto out;
2796 }
2797
2798 mutex_unlock(&sdata->local->sta_mtx);
2799
2800 /*
2801 * Always handle WMM once after association regardless
2802 * of the first value the AP uses. Setting -1 here has
2803 * that effect because the AP values is an unsigned
2804 * 4-bit value.
2805 */
2806 ifmgd->wmm_last_param_set = -1;
2807
2808 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2809 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2810 elems.wmm_param_len);
2811 else
2812 ieee80211_set_wmm_default(sdata, false);
2813 changed |= BSS_CHANGED_QOS;
2814
2815 /* set AID and assoc capability,
2816 * ieee80211_set_associated() will tell the driver */
2817 bss_conf->aid = aid;
2818 bss_conf->assoc_capability = capab_info;
2819 ieee80211_set_associated(sdata, cbss, changed);
2820
2821 /*
2822 * If we're using 4-addr mode, let the AP know that we're
2823 * doing so, so that it can create the STA VLAN on its side
2824 */
2825 if (ifmgd->use_4addr)
2826 ieee80211_send_4addr_nullfunc(local, sdata);
2827
2828 /*
2829 * Start timer to probe the connection to the AP now.
2830 * Also start the timer that will detect beacon loss.
2831 */
2832 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2833 ieee80211_sta_reset_beacon_monitor(sdata);
2834
2835 ret = true;
2836 out:
2837 kfree(bss_ies);
2838 return ret;
2839 }
2840
2841 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2842 struct ieee80211_mgmt *mgmt,
2843 size_t len)
2844 {
2845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2846 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2847 u16 capab_info, status_code, aid;
2848 struct ieee802_11_elems elems;
2849 int ac, uapsd_queues = -1;
2850 u8 *pos;
2851 bool reassoc;
2852 struct cfg80211_bss *bss;
2853
2854 sdata_assert_lock(sdata);
2855
2856 if (!assoc_data)
2857 return;
2858 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2859 return;
2860
2861 /*
2862 * AssocResp and ReassocResp have identical structure, so process both
2863 * of them in this function.
2864 */
2865
2866 if (len < 24 + 6)
2867 return;
2868
2869 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2870 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2871 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2872 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2873
2874 sdata_info(sdata,
2875 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2876 reassoc ? "Rea" : "A", mgmt->sa,
2877 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2878
2879 pos = mgmt->u.assoc_resp.variable;
2880 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2881
2882 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2883 elems.timeout_int &&
2884 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2885 u32 tu, ms;
2886 tu = le32_to_cpu(elems.timeout_int->value);
2887 ms = tu * 1024 / 1000;
2888 sdata_info(sdata,
2889 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2890 mgmt->sa, tu, ms);
2891 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2892 assoc_data->timeout_started = true;
2893 if (ms > IEEE80211_ASSOC_TIMEOUT)
2894 run_again(sdata, assoc_data->timeout);
2895 return;
2896 }
2897
2898 bss = assoc_data->bss;
2899
2900 if (status_code != WLAN_STATUS_SUCCESS) {
2901 sdata_info(sdata, "%pM denied association (code=%d)\n",
2902 mgmt->sa, status_code);
2903 ieee80211_destroy_assoc_data(sdata, false);
2904 } else {
2905 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2906 /* oops -- internal error -- send timeout for now */
2907 ieee80211_destroy_assoc_data(sdata, false);
2908 cfg80211_assoc_timeout(sdata->dev, bss);
2909 return;
2910 }
2911 sdata_info(sdata, "associated\n");
2912
2913 /*
2914 * destroy assoc_data afterwards, as otherwise an idle
2915 * recalc after assoc_data is NULL but before associated
2916 * is set can cause the interface to go idle
2917 */
2918 ieee80211_destroy_assoc_data(sdata, true);
2919
2920 /* get uapsd queues configuration */
2921 uapsd_queues = 0;
2922 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2923 if (sdata->tx_conf[ac].uapsd)
2924 uapsd_queues |= BIT(ac);
2925 }
2926
2927 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
2928 }
2929
2930 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2931 struct ieee80211_mgmt *mgmt, size_t len,
2932 struct ieee80211_rx_status *rx_status,
2933 struct ieee802_11_elems *elems)
2934 {
2935 struct ieee80211_local *local = sdata->local;
2936 struct ieee80211_bss *bss;
2937 struct ieee80211_channel *channel;
2938
2939 sdata_assert_lock(sdata);
2940
2941 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2942 if (!channel)
2943 return;
2944
2945 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2946 channel);
2947 if (bss) {
2948 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2949 ieee80211_rx_bss_put(local, bss);
2950 }
2951 }
2952
2953
2954 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2955 struct sk_buff *skb)
2956 {
2957 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2958 struct ieee80211_if_managed *ifmgd;
2959 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2960 size_t baselen, len = skb->len;
2961 struct ieee802_11_elems elems;
2962
2963 ifmgd = &sdata->u.mgd;
2964
2965 sdata_assert_lock(sdata);
2966
2967 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2968 return; /* ignore ProbeResp to foreign address */
2969
2970 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2971 if (baselen > len)
2972 return;
2973
2974 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2975 false, &elems);
2976
2977 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2978
2979 if (ifmgd->associated &&
2980 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2981 ieee80211_reset_ap_probe(sdata);
2982
2983 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2984 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2985 /* got probe response, continue with auth */
2986 sdata_info(sdata, "direct probe responded\n");
2987 ifmgd->auth_data->tries = 0;
2988 ifmgd->auth_data->timeout = jiffies;
2989 ifmgd->auth_data->timeout_started = true;
2990 run_again(sdata, ifmgd->auth_data->timeout);
2991 }
2992 }
2993
2994 /*
2995 * This is the canonical list of information elements we care about,
2996 * the filter code also gives us all changes to the Microsoft OUI
2997 * (00:50:F2) vendor IE which is used for WMM which we need to track,
2998 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
2999 * changes to requested client power.
3000 *
3001 * We implement beacon filtering in software since that means we can
3002 * avoid processing the frame here and in cfg80211, and userspace
3003 * will not be able to tell whether the hardware supports it or not.
3004 *
3005 * XXX: This list needs to be dynamic -- userspace needs to be able to
3006 * add items it requires. It also needs to be able to tell us to
3007 * look out for other vendor IEs.
3008 */
3009 static const u64 care_about_ies =
3010 (1ULL << WLAN_EID_COUNTRY) |
3011 (1ULL << WLAN_EID_ERP_INFO) |
3012 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3013 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3014 (1ULL << WLAN_EID_HT_CAPABILITY) |
3015 (1ULL << WLAN_EID_HT_OPERATION);
3016
3017 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3018 struct ieee80211_mgmt *mgmt, size_t len,
3019 struct ieee80211_rx_status *rx_status)
3020 {
3021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3022 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3023 size_t baselen;
3024 struct ieee802_11_elems elems;
3025 struct ieee80211_local *local = sdata->local;
3026 struct ieee80211_chanctx_conf *chanctx_conf;
3027 struct ieee80211_channel *chan;
3028 struct sta_info *sta;
3029 u32 changed = 0;
3030 bool erp_valid;
3031 u8 erp_value = 0;
3032 u32 ncrc;
3033 u8 *bssid;
3034 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3035
3036 sdata_assert_lock(sdata);
3037
3038 /* Process beacon from the current BSS */
3039 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3040 if (baselen > len)
3041 return;
3042
3043 rcu_read_lock();
3044 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3045 if (!chanctx_conf) {
3046 rcu_read_unlock();
3047 return;
3048 }
3049
3050 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3051 rcu_read_unlock();
3052 return;
3053 }
3054 chan = chanctx_conf->def.chan;
3055 rcu_read_unlock();
3056
3057 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3058 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3059 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3060 len - baselen, false, &elems);
3061
3062 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3063 if (elems.tim && !elems.parse_error) {
3064 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3065 ifmgd->dtim_period = tim_ie->dtim_period;
3066 }
3067 ifmgd->have_beacon = true;
3068 ifmgd->assoc_data->need_beacon = false;
3069 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3070 sdata->vif.bss_conf.sync_tsf =
3071 le64_to_cpu(mgmt->u.beacon.timestamp);
3072 sdata->vif.bss_conf.sync_device_ts =
3073 rx_status->device_timestamp;
3074 if (elems.tim)
3075 sdata->vif.bss_conf.sync_dtim_count =
3076 elems.tim->dtim_count;
3077 else
3078 sdata->vif.bss_conf.sync_dtim_count = 0;
3079 }
3080 /* continue assoc process */
3081 ifmgd->assoc_data->timeout = jiffies;
3082 ifmgd->assoc_data->timeout_started = true;
3083 run_again(sdata, ifmgd->assoc_data->timeout);
3084 return;
3085 }
3086
3087 if (!ifmgd->associated ||
3088 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3089 return;
3090 bssid = ifmgd->associated->bssid;
3091
3092 /* Track average RSSI from the Beacon frames of the current AP */
3093 ifmgd->last_beacon_signal = rx_status->signal;
3094 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3095 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3096 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3097 ifmgd->last_cqm_event_signal = 0;
3098 ifmgd->count_beacon_signal = 1;
3099 ifmgd->last_ave_beacon_signal = 0;
3100 } else {
3101 ifmgd->ave_beacon_signal =
3102 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3103 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3104 ifmgd->ave_beacon_signal) / 16;
3105 ifmgd->count_beacon_signal++;
3106 }
3107
3108 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3109 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3110 int sig = ifmgd->ave_beacon_signal;
3111 int last_sig = ifmgd->last_ave_beacon_signal;
3112
3113 /*
3114 * if signal crosses either of the boundaries, invoke callback
3115 * with appropriate parameters
3116 */
3117 if (sig > ifmgd->rssi_max_thold &&
3118 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3119 ifmgd->last_ave_beacon_signal = sig;
3120 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3121 } else if (sig < ifmgd->rssi_min_thold &&
3122 (last_sig >= ifmgd->rssi_max_thold ||
3123 last_sig == 0)) {
3124 ifmgd->last_ave_beacon_signal = sig;
3125 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3126 }
3127 }
3128
3129 if (bss_conf->cqm_rssi_thold &&
3130 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3131 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3132 int sig = ifmgd->ave_beacon_signal / 16;
3133 int last_event = ifmgd->last_cqm_event_signal;
3134 int thold = bss_conf->cqm_rssi_thold;
3135 int hyst = bss_conf->cqm_rssi_hyst;
3136 if (sig < thold &&
3137 (last_event == 0 || sig < last_event - hyst)) {
3138 ifmgd->last_cqm_event_signal = sig;
3139 ieee80211_cqm_rssi_notify(
3140 &sdata->vif,
3141 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3142 GFP_KERNEL);
3143 } else if (sig > thold &&
3144 (last_event == 0 || sig > last_event + hyst)) {
3145 ifmgd->last_cqm_event_signal = sig;
3146 ieee80211_cqm_rssi_notify(
3147 &sdata->vif,
3148 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3149 GFP_KERNEL);
3150 }
3151 }
3152
3153 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3154 mlme_dbg_ratelimited(sdata,
3155 "cancelling AP probe due to a received beacon\n");
3156 ieee80211_reset_ap_probe(sdata);
3157 }
3158
3159 /*
3160 * Push the beacon loss detection into the future since
3161 * we are processing a beacon from the AP just now.
3162 */
3163 ieee80211_sta_reset_beacon_monitor(sdata);
3164
3165 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3166 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3167 len - baselen, false, &elems,
3168 care_about_ies, ncrc);
3169
3170 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3171 bool directed_tim = ieee80211_check_tim(elems.tim,
3172 elems.tim_len,
3173 ifmgd->aid);
3174 if (directed_tim) {
3175 if (local->hw.conf.dynamic_ps_timeout > 0) {
3176 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3177 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3178 ieee80211_hw_config(local,
3179 IEEE80211_CONF_CHANGE_PS);
3180 }
3181 ieee80211_send_nullfunc(local, sdata, 0);
3182 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3183 local->pspolling = true;
3184
3185 /*
3186 * Here is assumed that the driver will be
3187 * able to send ps-poll frame and receive a
3188 * response even though power save mode is
3189 * enabled, but some drivers might require
3190 * to disable power save here. This needs
3191 * to be investigated.
3192 */
3193 ieee80211_send_pspoll(local, sdata);
3194 }
3195 }
3196 }
3197
3198 if (sdata->vif.p2p) {
3199 struct ieee80211_p2p_noa_attr noa = {};
3200 int ret;
3201
3202 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3203 len - baselen,
3204 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3205 (u8 *) &noa, sizeof(noa));
3206 if (ret >= 2) {
3207 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3208 /* valid noa_attr and index changed */
3209 sdata->u.mgd.p2p_noa_index = noa.index;
3210 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3211 changed |= BSS_CHANGED_P2P_PS;
3212 /*
3213 * make sure we update all information, the CRC
3214 * mechanism doesn't look at P2P attributes.
3215 */
3216 ifmgd->beacon_crc_valid = false;
3217 }
3218 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3219 /* noa_attr not found and we had valid noa_attr before */
3220 sdata->u.mgd.p2p_noa_index = -1;
3221 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3222 changed |= BSS_CHANGED_P2P_PS;
3223 ifmgd->beacon_crc_valid = false;
3224 }
3225 }
3226
3227 if (ifmgd->csa_waiting_bcn)
3228 ieee80211_chswitch_post_beacon(sdata);
3229
3230 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3231 return;
3232 ifmgd->beacon_crc = ncrc;
3233 ifmgd->beacon_crc_valid = true;
3234
3235 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3236
3237 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3238 rx_status->device_timestamp,
3239 &elems, true);
3240
3241 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3242 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3243 elems.wmm_param_len))
3244 changed |= BSS_CHANGED_QOS;
3245
3246 /*
3247 * If we haven't had a beacon before, tell the driver about the
3248 * DTIM period (and beacon timing if desired) now.
3249 */
3250 if (!ifmgd->have_beacon) {
3251 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3252 if (elems.tim)
3253 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3254 else
3255 bss_conf->dtim_period = 1;
3256
3257 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3258 sdata->vif.bss_conf.sync_tsf =
3259 le64_to_cpu(mgmt->u.beacon.timestamp);
3260 sdata->vif.bss_conf.sync_device_ts =
3261 rx_status->device_timestamp;
3262 if (elems.tim)
3263 sdata->vif.bss_conf.sync_dtim_count =
3264 elems.tim->dtim_count;
3265 else
3266 sdata->vif.bss_conf.sync_dtim_count = 0;
3267 }
3268
3269 changed |= BSS_CHANGED_BEACON_INFO;
3270 ifmgd->have_beacon = true;
3271
3272 mutex_lock(&local->iflist_mtx);
3273 ieee80211_recalc_ps(local, -1);
3274 mutex_unlock(&local->iflist_mtx);
3275
3276 ieee80211_recalc_ps_vif(sdata);
3277 }
3278
3279 if (elems.erp_info) {
3280 erp_valid = true;
3281 erp_value = elems.erp_info[0];
3282 } else {
3283 erp_valid = false;
3284 }
3285 changed |= ieee80211_handle_bss_capability(sdata,
3286 le16_to_cpu(mgmt->u.beacon.capab_info),
3287 erp_valid, erp_value);
3288
3289 mutex_lock(&local->sta_mtx);
3290 sta = sta_info_get(sdata, bssid);
3291
3292 if (ieee80211_config_bw(sdata, sta,
3293 elems.ht_cap_elem, elems.ht_operation,
3294 elems.vht_operation, bssid, &changed)) {
3295 mutex_unlock(&local->sta_mtx);
3296 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3297 WLAN_REASON_DEAUTH_LEAVING,
3298 true, deauth_buf);
3299 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3300 sizeof(deauth_buf));
3301 return;
3302 }
3303
3304 if (sta && elems.opmode_notif)
3305 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3306 rx_status->band, true);
3307 mutex_unlock(&local->sta_mtx);
3308
3309 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3310 elems.country_elem,
3311 elems.country_elem_len,
3312 elems.pwr_constr_elem,
3313 elems.cisco_dtpc_elem);
3314
3315 ieee80211_bss_info_change_notify(sdata, changed);
3316 }
3317
3318 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3319 struct sk_buff *skb)
3320 {
3321 struct ieee80211_rx_status *rx_status;
3322 struct ieee80211_mgmt *mgmt;
3323 u16 fc;
3324 struct ieee802_11_elems elems;
3325 int ies_len;
3326
3327 rx_status = (struct ieee80211_rx_status *) skb->cb;
3328 mgmt = (struct ieee80211_mgmt *) skb->data;
3329 fc = le16_to_cpu(mgmt->frame_control);
3330
3331 sdata_lock(sdata);
3332
3333 switch (fc & IEEE80211_FCTL_STYPE) {
3334 case IEEE80211_STYPE_BEACON:
3335 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3336 break;
3337 case IEEE80211_STYPE_PROBE_RESP:
3338 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3339 break;
3340 case IEEE80211_STYPE_AUTH:
3341 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3342 break;
3343 case IEEE80211_STYPE_DEAUTH:
3344 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3345 break;
3346 case IEEE80211_STYPE_DISASSOC:
3347 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3348 break;
3349 case IEEE80211_STYPE_ASSOC_RESP:
3350 case IEEE80211_STYPE_REASSOC_RESP:
3351 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3352 break;
3353 case IEEE80211_STYPE_ACTION:
3354 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3355 ies_len = skb->len -
3356 offsetof(struct ieee80211_mgmt,
3357 u.action.u.chan_switch.variable);
3358
3359 if (ies_len < 0)
3360 break;
3361
3362 ieee802_11_parse_elems(
3363 mgmt->u.action.u.chan_switch.variable,
3364 ies_len, true, &elems);
3365
3366 if (elems.parse_error)
3367 break;
3368
3369 ieee80211_sta_process_chanswitch(sdata,
3370 rx_status->mactime,
3371 rx_status->device_timestamp,
3372 &elems, false);
3373 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3374 ies_len = skb->len -
3375 offsetof(struct ieee80211_mgmt,
3376 u.action.u.ext_chan_switch.variable);
3377
3378 if (ies_len < 0)
3379 break;
3380
3381 ieee802_11_parse_elems(
3382 mgmt->u.action.u.ext_chan_switch.variable,
3383 ies_len, true, &elems);
3384
3385 if (elems.parse_error)
3386 break;
3387
3388 /* for the handling code pretend this was also an IE */
3389 elems.ext_chansw_ie =
3390 &mgmt->u.action.u.ext_chan_switch.data;
3391
3392 ieee80211_sta_process_chanswitch(sdata,
3393 rx_status->mactime,
3394 rx_status->device_timestamp,
3395 &elems, false);
3396 }
3397 break;
3398 }
3399 sdata_unlock(sdata);
3400 }
3401
3402 static void ieee80211_sta_timer(unsigned long data)
3403 {
3404 struct ieee80211_sub_if_data *sdata =
3405 (struct ieee80211_sub_if_data *) data;
3406
3407 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3408 }
3409
3410 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3411 u8 *bssid, u8 reason, bool tx)
3412 {
3413 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3414
3415 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3416 tx, frame_buf);
3417
3418 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3419 IEEE80211_DEAUTH_FRAME_LEN);
3420 }
3421
3422 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3423 {
3424 struct ieee80211_local *local = sdata->local;
3425 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3426 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3427 u32 tx_flags = 0;
3428
3429 sdata_assert_lock(sdata);
3430
3431 if (WARN_ON_ONCE(!auth_data))
3432 return -EINVAL;
3433
3434 auth_data->tries++;
3435
3436 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3437 sdata_info(sdata, "authentication with %pM timed out\n",
3438 auth_data->bss->bssid);
3439
3440 /*
3441 * Most likely AP is not in the range so remove the
3442 * bss struct for that AP.
3443 */
3444 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3445
3446 return -ETIMEDOUT;
3447 }
3448
3449 drv_mgd_prepare_tx(local, sdata);
3450
3451 if (auth_data->bss->proberesp_ies) {
3452 u16 trans = 1;
3453 u16 status = 0;
3454
3455 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3456 auth_data->bss->bssid, auth_data->tries,
3457 IEEE80211_AUTH_MAX_TRIES);
3458
3459 auth_data->expected_transaction = 2;
3460
3461 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3462 trans = auth_data->sae_trans;
3463 status = auth_data->sae_status;
3464 auth_data->expected_transaction = trans;
3465 }
3466
3467 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3468 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3469 IEEE80211_TX_INTFL_MLME_CONN_TX;
3470
3471 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3472 auth_data->data, auth_data->data_len,
3473 auth_data->bss->bssid,
3474 auth_data->bss->bssid, NULL, 0, 0,
3475 tx_flags);
3476 } else {
3477 const u8 *ssidie;
3478
3479 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3480 auth_data->bss->bssid, auth_data->tries,
3481 IEEE80211_AUTH_MAX_TRIES);
3482
3483 rcu_read_lock();
3484 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3485 if (!ssidie) {
3486 rcu_read_unlock();
3487 return -EINVAL;
3488 }
3489 /*
3490 * Direct probe is sent to broadcast address as some APs
3491 * will not answer to direct packet in unassociated state.
3492 */
3493 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3494 NULL, 0, (u32) -1, true, 0,
3495 auth_data->bss->channel, false);
3496 rcu_read_unlock();
3497 }
3498
3499 if (tx_flags == 0) {
3500 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3501 auth_data->timeout_started = true;
3502 run_again(sdata, auth_data->timeout);
3503 } else {
3504 auth_data->timeout =
3505 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3506 auth_data->timeout_started = true;
3507 run_again(sdata, auth_data->timeout);
3508 }
3509
3510 return 0;
3511 }
3512
3513 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3514 {
3515 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3516 struct ieee80211_local *local = sdata->local;
3517
3518 sdata_assert_lock(sdata);
3519
3520 assoc_data->tries++;
3521 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3522 sdata_info(sdata, "association with %pM timed out\n",
3523 assoc_data->bss->bssid);
3524
3525 /*
3526 * Most likely AP is not in the range so remove the
3527 * bss struct for that AP.
3528 */
3529 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3530
3531 return -ETIMEDOUT;
3532 }
3533
3534 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3535 assoc_data->bss->bssid, assoc_data->tries,
3536 IEEE80211_ASSOC_MAX_TRIES);
3537 ieee80211_send_assoc(sdata);
3538
3539 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3540 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3541 assoc_data->timeout_started = true;
3542 run_again(sdata, assoc_data->timeout);
3543 } else {
3544 assoc_data->timeout =
3545 round_jiffies_up(jiffies +
3546 IEEE80211_ASSOC_TIMEOUT_LONG);
3547 assoc_data->timeout_started = true;
3548 run_again(sdata, assoc_data->timeout);
3549 }
3550
3551 return 0;
3552 }
3553
3554 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3555 __le16 fc, bool acked)
3556 {
3557 struct ieee80211_local *local = sdata->local;
3558
3559 sdata->u.mgd.status_fc = fc;
3560 sdata->u.mgd.status_acked = acked;
3561 sdata->u.mgd.status_received = true;
3562
3563 ieee80211_queue_work(&local->hw, &sdata->work);
3564 }
3565
3566 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3567 {
3568 struct ieee80211_local *local = sdata->local;
3569 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3570
3571 sdata_lock(sdata);
3572
3573 if (ifmgd->status_received) {
3574 __le16 fc = ifmgd->status_fc;
3575 bool status_acked = ifmgd->status_acked;
3576
3577 ifmgd->status_received = false;
3578 if (ifmgd->auth_data &&
3579 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3580 if (status_acked) {
3581 ifmgd->auth_data->timeout =
3582 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3583 run_again(sdata, ifmgd->auth_data->timeout);
3584 } else {
3585 ifmgd->auth_data->timeout = jiffies - 1;
3586 }
3587 ifmgd->auth_data->timeout_started = true;
3588 } else if (ifmgd->assoc_data &&
3589 (ieee80211_is_assoc_req(fc) ||
3590 ieee80211_is_reassoc_req(fc))) {
3591 if (status_acked) {
3592 ifmgd->assoc_data->timeout =
3593 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3594 run_again(sdata, ifmgd->assoc_data->timeout);
3595 } else {
3596 ifmgd->assoc_data->timeout = jiffies - 1;
3597 }
3598 ifmgd->assoc_data->timeout_started = true;
3599 }
3600 }
3601
3602 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3603 time_after(jiffies, ifmgd->auth_data->timeout)) {
3604 if (ifmgd->auth_data->done) {
3605 /*
3606 * ok ... we waited for assoc but userspace didn't,
3607 * so let's just kill the auth data
3608 */
3609 ieee80211_destroy_auth_data(sdata, false);
3610 } else if (ieee80211_probe_auth(sdata)) {
3611 u8 bssid[ETH_ALEN];
3612
3613 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3614
3615 ieee80211_destroy_auth_data(sdata, false);
3616
3617 cfg80211_auth_timeout(sdata->dev, bssid);
3618 }
3619 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3620 run_again(sdata, ifmgd->auth_data->timeout);
3621
3622 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3623 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3624 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3625 ieee80211_do_assoc(sdata)) {
3626 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3627
3628 ieee80211_destroy_assoc_data(sdata, false);
3629 cfg80211_assoc_timeout(sdata->dev, bss);
3630 }
3631 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3632 run_again(sdata, ifmgd->assoc_data->timeout);
3633
3634 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3635 ifmgd->associated) {
3636 u8 bssid[ETH_ALEN];
3637 int max_tries;
3638
3639 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3640
3641 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3642 max_tries = max_nullfunc_tries;
3643 else
3644 max_tries = max_probe_tries;
3645
3646 /* ACK received for nullfunc probing frame */
3647 if (!ifmgd->probe_send_count)
3648 ieee80211_reset_ap_probe(sdata);
3649 else if (ifmgd->nullfunc_failed) {
3650 if (ifmgd->probe_send_count < max_tries) {
3651 mlme_dbg(sdata,
3652 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3653 bssid, ifmgd->probe_send_count,
3654 max_tries);
3655 ieee80211_mgd_probe_ap_send(sdata);
3656 } else {
3657 mlme_dbg(sdata,
3658 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3659 bssid);
3660 ieee80211_sta_connection_lost(sdata, bssid,
3661 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3662 false);
3663 }
3664 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3665 run_again(sdata, ifmgd->probe_timeout);
3666 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3667 mlme_dbg(sdata,
3668 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3669 bssid, probe_wait_ms);
3670 ieee80211_sta_connection_lost(sdata, bssid,
3671 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3672 } else if (ifmgd->probe_send_count < max_tries) {
3673 mlme_dbg(sdata,
3674 "No probe response from AP %pM after %dms, try %d/%i\n",
3675 bssid, probe_wait_ms,
3676 ifmgd->probe_send_count, max_tries);
3677 ieee80211_mgd_probe_ap_send(sdata);
3678 } else {
3679 /*
3680 * We actually lost the connection ... or did we?
3681 * Let's make sure!
3682 */
3683 wiphy_debug(local->hw.wiphy,
3684 "%s: No probe response from AP %pM"
3685 " after %dms, disconnecting.\n",
3686 sdata->name,
3687 bssid, probe_wait_ms);
3688
3689 ieee80211_sta_connection_lost(sdata, bssid,
3690 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3691 }
3692 }
3693
3694 sdata_unlock(sdata);
3695 }
3696
3697 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3698 {
3699 struct ieee80211_sub_if_data *sdata =
3700 (struct ieee80211_sub_if_data *) data;
3701 struct ieee80211_local *local = sdata->local;
3702 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3703
3704 if (local->quiescing)
3705 return;
3706
3707 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3708 return;
3709
3710 sdata->u.mgd.connection_loss = false;
3711 ieee80211_queue_work(&sdata->local->hw,
3712 &sdata->u.mgd.beacon_connection_loss_work);
3713 }
3714
3715 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3716 {
3717 struct ieee80211_sub_if_data *sdata =
3718 (struct ieee80211_sub_if_data *) data;
3719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3720 struct ieee80211_local *local = sdata->local;
3721
3722 if (local->quiescing)
3723 return;
3724
3725 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3726 return;
3727
3728 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3729 }
3730
3731 static void ieee80211_sta_monitor_work(struct work_struct *work)
3732 {
3733 struct ieee80211_sub_if_data *sdata =
3734 container_of(work, struct ieee80211_sub_if_data,
3735 u.mgd.monitor_work);
3736
3737 ieee80211_mgd_probe_ap(sdata, false);
3738 }
3739
3740 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3741 {
3742 u32 flags;
3743
3744 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3745 __ieee80211_stop_poll(sdata);
3746
3747 /* let's probe the connection once */
3748 flags = sdata->local->hw.flags;
3749 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3750 ieee80211_queue_work(&sdata->local->hw,
3751 &sdata->u.mgd.monitor_work);
3752 /* and do all the other regular work too */
3753 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3754 }
3755 }
3756
3757 #ifdef CONFIG_PM
3758 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3759 {
3760 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3761 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3762
3763 sdata_lock(sdata);
3764
3765 if (ifmgd->auth_data || ifmgd->assoc_data) {
3766 const u8 *bssid = ifmgd->auth_data ?
3767 ifmgd->auth_data->bss->bssid :
3768 ifmgd->assoc_data->bss->bssid;
3769
3770 /*
3771 * If we are trying to authenticate / associate while suspending,
3772 * cfg80211 won't know and won't actually abort those attempts,
3773 * thus we need to do that ourselves.
3774 */
3775 ieee80211_send_deauth_disassoc(sdata, bssid,
3776 IEEE80211_STYPE_DEAUTH,
3777 WLAN_REASON_DEAUTH_LEAVING,
3778 false, frame_buf);
3779 if (ifmgd->assoc_data)
3780 ieee80211_destroy_assoc_data(sdata, false);
3781 if (ifmgd->auth_data)
3782 ieee80211_destroy_auth_data(sdata, false);
3783 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3784 IEEE80211_DEAUTH_FRAME_LEN);
3785 }
3786
3787 sdata_unlock(sdata);
3788 }
3789
3790 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3791 {
3792 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3793
3794 sdata_lock(sdata);
3795 if (!ifmgd->associated) {
3796 sdata_unlock(sdata);
3797 return;
3798 }
3799
3800 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3801 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3802 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3803 ieee80211_sta_connection_lost(sdata,
3804 ifmgd->associated->bssid,
3805 WLAN_REASON_UNSPECIFIED,
3806 true);
3807 sdata_unlock(sdata);
3808 return;
3809 }
3810 sdata_unlock(sdata);
3811 }
3812 #endif
3813
3814 /* interface setup */
3815 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3816 {
3817 struct ieee80211_if_managed *ifmgd;
3818
3819 ifmgd = &sdata->u.mgd;
3820 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3821 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3822 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3823 ieee80211_beacon_connection_loss_work);
3824 INIT_WORK(&ifmgd->csa_connection_drop_work,
3825 ieee80211_csa_connection_drop_work);
3826 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3827 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3828 ieee80211_tdls_peer_del_work);
3829 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3830 (unsigned long) sdata);
3831 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3832 (unsigned long) sdata);
3833 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3834 (unsigned long) sdata);
3835 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3836 (unsigned long) sdata);
3837
3838 ifmgd->flags = 0;
3839 ifmgd->powersave = sdata->wdev.ps;
3840 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3841 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3842 ifmgd->p2p_noa_index = -1;
3843
3844 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
3845 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3846 else
3847 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3848 }
3849
3850 /* scan finished notification */
3851 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3852 {
3853 struct ieee80211_sub_if_data *sdata;
3854
3855 /* Restart STA timers */
3856 rcu_read_lock();
3857 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3858 if (ieee80211_sdata_running(sdata))
3859 ieee80211_restart_sta_timer(sdata);
3860 }
3861 rcu_read_unlock();
3862 }
3863
3864 int ieee80211_max_network_latency(struct notifier_block *nb,
3865 unsigned long data, void *dummy)
3866 {
3867 s32 latency_usec = (s32) data;
3868 struct ieee80211_local *local =
3869 container_of(nb, struct ieee80211_local,
3870 network_latency_notifier);
3871
3872 mutex_lock(&local->iflist_mtx);
3873 ieee80211_recalc_ps(local, latency_usec);
3874 mutex_unlock(&local->iflist_mtx);
3875
3876 return NOTIFY_OK;
3877 }
3878
3879 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3880 struct cfg80211_bss *cbss)
3881 {
3882 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3883 const u8 *ht_cap_ie, *vht_cap_ie;
3884 const struct ieee80211_ht_cap *ht_cap;
3885 const struct ieee80211_vht_cap *vht_cap;
3886 u8 chains = 1;
3887
3888 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3889 return chains;
3890
3891 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3892 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3893 ht_cap = (void *)(ht_cap_ie + 2);
3894 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3895 /*
3896 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3897 * "Tx Unequal Modulation Supported" fields.
3898 */
3899 }
3900
3901 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3902 return chains;
3903
3904 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3905 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3906 u8 nss;
3907 u16 tx_mcs_map;
3908
3909 vht_cap = (void *)(vht_cap_ie + 2);
3910 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3911 for (nss = 8; nss > 0; nss--) {
3912 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3913 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3914 break;
3915 }
3916 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3917 chains = max(chains, nss);
3918 }
3919
3920 return chains;
3921 }
3922
3923 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3924 struct cfg80211_bss *cbss)
3925 {
3926 struct ieee80211_local *local = sdata->local;
3927 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3928 const struct ieee80211_ht_cap *ht_cap = NULL;
3929 const struct ieee80211_ht_operation *ht_oper = NULL;
3930 const struct ieee80211_vht_operation *vht_oper = NULL;
3931 struct ieee80211_supported_band *sband;
3932 struct cfg80211_chan_def chandef;
3933 int ret;
3934
3935 sband = local->hw.wiphy->bands[cbss->channel->band];
3936
3937 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3938 IEEE80211_STA_DISABLE_80P80MHZ |
3939 IEEE80211_STA_DISABLE_160MHZ);
3940
3941 rcu_read_lock();
3942
3943 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3944 sband->ht_cap.ht_supported) {
3945 const u8 *ht_oper_ie, *ht_cap_ie;
3946
3947 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3948 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3949 ht_oper = (void *)(ht_oper_ie + 2);
3950
3951 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3952 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
3953 ht_cap = (void *)(ht_cap_ie + 2);
3954
3955 if (!ht_cap) {
3956 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3957 ht_oper = NULL;
3958 }
3959 }
3960
3961 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3962 sband->vht_cap.vht_supported) {
3963 const u8 *vht_oper_ie, *vht_cap;
3964
3965 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3966 WLAN_EID_VHT_OPERATION);
3967 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3968 vht_oper = (void *)(vht_oper_ie + 2);
3969 if (vht_oper && !ht_oper) {
3970 vht_oper = NULL;
3971 sdata_info(sdata,
3972 "AP advertised VHT without HT, disabling both\n");
3973 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3974 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3975 }
3976
3977 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3978 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3979 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3980 vht_oper = NULL;
3981 }
3982 }
3983
3984 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3985 cbss->channel,
3986 ht_cap, ht_oper, vht_oper,
3987 &chandef, false);
3988
3989 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3990 local->rx_chains);
3991
3992 rcu_read_unlock();
3993
3994 /* will change later if needed */
3995 sdata->smps_mode = IEEE80211_SMPS_OFF;
3996
3997 mutex_lock(&local->mtx);
3998 /*
3999 * If this fails (possibly due to channel context sharing
4000 * on incompatible channels, e.g. 80+80 and 160 sharing the
4001 * same control channel) try to use a smaller bandwidth.
4002 */
4003 ret = ieee80211_vif_use_channel(sdata, &chandef,
4004 IEEE80211_CHANCTX_SHARED);
4005
4006 /* don't downgrade for 5 and 10 MHz channels, though. */
4007 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4008 chandef.width == NL80211_CHAN_WIDTH_10)
4009 goto out;
4010
4011 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4012 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4013 ret = ieee80211_vif_use_channel(sdata, &chandef,
4014 IEEE80211_CHANCTX_SHARED);
4015 }
4016 out:
4017 mutex_unlock(&local->mtx);
4018 return ret;
4019 }
4020
4021 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4022 struct cfg80211_bss *cbss, bool assoc)
4023 {
4024 struct ieee80211_local *local = sdata->local;
4025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4026 struct ieee80211_bss *bss = (void *)cbss->priv;
4027 struct sta_info *new_sta = NULL;
4028 bool have_sta = false;
4029 int err;
4030
4031 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4032 return -EINVAL;
4033
4034 if (assoc) {
4035 rcu_read_lock();
4036 have_sta = sta_info_get(sdata, cbss->bssid);
4037 rcu_read_unlock();
4038 }
4039
4040 if (!have_sta) {
4041 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4042 if (!new_sta)
4043 return -ENOMEM;
4044 }
4045 if (new_sta) {
4046 u32 rates = 0, basic_rates = 0;
4047 bool have_higher_than_11mbit;
4048 int min_rate = INT_MAX, min_rate_index = -1;
4049 struct ieee80211_chanctx_conf *chanctx_conf;
4050 struct ieee80211_supported_band *sband;
4051 const struct cfg80211_bss_ies *ies;
4052 int shift;
4053 u32 rate_flags;
4054
4055 sband = local->hw.wiphy->bands[cbss->channel->band];
4056
4057 err = ieee80211_prep_channel(sdata, cbss);
4058 if (err) {
4059 sta_info_free(local, new_sta);
4060 return -EINVAL;
4061 }
4062 shift = ieee80211_vif_get_shift(&sdata->vif);
4063
4064 rcu_read_lock();
4065 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4066 if (WARN_ON(!chanctx_conf)) {
4067 rcu_read_unlock();
4068 sta_info_free(local, new_sta);
4069 return -EINVAL;
4070 }
4071 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4072 rcu_read_unlock();
4073
4074 ieee80211_get_rates(sband, bss->supp_rates,
4075 bss->supp_rates_len,
4076 &rates, &basic_rates,
4077 &have_higher_than_11mbit,
4078 &min_rate, &min_rate_index,
4079 shift, rate_flags);
4080
4081 /*
4082 * This used to be a workaround for basic rates missing
4083 * in the association response frame. Now that we no
4084 * longer use the basic rates from there, it probably
4085 * doesn't happen any more, but keep the workaround so
4086 * in case some *other* APs are buggy in different ways
4087 * we can connect -- with a warning.
4088 */
4089 if (!basic_rates && min_rate_index >= 0) {
4090 sdata_info(sdata,
4091 "No basic rates, using min rate instead\n");
4092 basic_rates = BIT(min_rate_index);
4093 }
4094
4095 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4096 sdata->vif.bss_conf.basic_rates = basic_rates;
4097
4098 /* cf. IEEE 802.11 9.2.12 */
4099 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4100 have_higher_than_11mbit)
4101 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4102 else
4103 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4104
4105 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4106
4107 /* set timing information */
4108 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4109 rcu_read_lock();
4110 ies = rcu_dereference(cbss->beacon_ies);
4111 if (ies) {
4112 const u8 *tim_ie;
4113
4114 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4115 sdata->vif.bss_conf.sync_device_ts =
4116 bss->device_ts_beacon;
4117 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4118 ies->data, ies->len);
4119 if (tim_ie && tim_ie[1] >= 2)
4120 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4121 else
4122 sdata->vif.bss_conf.sync_dtim_count = 0;
4123 } else if (!(local->hw.flags &
4124 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4125 ies = rcu_dereference(cbss->proberesp_ies);
4126 /* must be non-NULL since beacon IEs were NULL */
4127 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4128 sdata->vif.bss_conf.sync_device_ts =
4129 bss->device_ts_presp;
4130 sdata->vif.bss_conf.sync_dtim_count = 0;
4131 } else {
4132 sdata->vif.bss_conf.sync_tsf = 0;
4133 sdata->vif.bss_conf.sync_device_ts = 0;
4134 sdata->vif.bss_conf.sync_dtim_count = 0;
4135 }
4136 rcu_read_unlock();
4137
4138 /* tell driver about BSSID, basic rates and timing */
4139 ieee80211_bss_info_change_notify(sdata,
4140 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4141 BSS_CHANGED_BEACON_INT);
4142
4143 if (assoc)
4144 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4145
4146 err = sta_info_insert(new_sta);
4147 new_sta = NULL;
4148 if (err) {
4149 sdata_info(sdata,
4150 "failed to insert STA entry for the AP (error %d)\n",
4151 err);
4152 return err;
4153 }
4154 } else
4155 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4156
4157 return 0;
4158 }
4159
4160 /* config hooks */
4161 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4162 struct cfg80211_auth_request *req)
4163 {
4164 struct ieee80211_local *local = sdata->local;
4165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4166 struct ieee80211_mgd_auth_data *auth_data;
4167 u16 auth_alg;
4168 int err;
4169
4170 /* prepare auth data structure */
4171
4172 switch (req->auth_type) {
4173 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4174 auth_alg = WLAN_AUTH_OPEN;
4175 break;
4176 case NL80211_AUTHTYPE_SHARED_KEY:
4177 if (IS_ERR(local->wep_tx_tfm))
4178 return -EOPNOTSUPP;
4179 auth_alg = WLAN_AUTH_SHARED_KEY;
4180 break;
4181 case NL80211_AUTHTYPE_FT:
4182 auth_alg = WLAN_AUTH_FT;
4183 break;
4184 case NL80211_AUTHTYPE_NETWORK_EAP:
4185 auth_alg = WLAN_AUTH_LEAP;
4186 break;
4187 case NL80211_AUTHTYPE_SAE:
4188 auth_alg = WLAN_AUTH_SAE;
4189 break;
4190 default:
4191 return -EOPNOTSUPP;
4192 }
4193
4194 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4195 req->ie_len, GFP_KERNEL);
4196 if (!auth_data)
4197 return -ENOMEM;
4198
4199 auth_data->bss = req->bss;
4200
4201 if (req->sae_data_len >= 4) {
4202 __le16 *pos = (__le16 *) req->sae_data;
4203 auth_data->sae_trans = le16_to_cpu(pos[0]);
4204 auth_data->sae_status = le16_to_cpu(pos[1]);
4205 memcpy(auth_data->data, req->sae_data + 4,
4206 req->sae_data_len - 4);
4207 auth_data->data_len += req->sae_data_len - 4;
4208 }
4209
4210 if (req->ie && req->ie_len) {
4211 memcpy(&auth_data->data[auth_data->data_len],
4212 req->ie, req->ie_len);
4213 auth_data->data_len += req->ie_len;
4214 }
4215
4216 if (req->key && req->key_len) {
4217 auth_data->key_len = req->key_len;
4218 auth_data->key_idx = req->key_idx;
4219 memcpy(auth_data->key, req->key, req->key_len);
4220 }
4221
4222 auth_data->algorithm = auth_alg;
4223
4224 /* try to authenticate/probe */
4225
4226 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4227 ifmgd->assoc_data) {
4228 err = -EBUSY;
4229 goto err_free;
4230 }
4231
4232 if (ifmgd->auth_data)
4233 ieee80211_destroy_auth_data(sdata, false);
4234
4235 /* prep auth_data so we don't go into idle on disassoc */
4236 ifmgd->auth_data = auth_data;
4237
4238 if (ifmgd->associated) {
4239 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4240
4241 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4242 WLAN_REASON_UNSPECIFIED,
4243 false, frame_buf);
4244
4245 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4246 sizeof(frame_buf));
4247 }
4248
4249 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4250
4251 err = ieee80211_prep_connection(sdata, req->bss, false);
4252 if (err)
4253 goto err_clear;
4254
4255 err = ieee80211_probe_auth(sdata);
4256 if (err) {
4257 sta_info_destroy_addr(sdata, req->bss->bssid);
4258 goto err_clear;
4259 }
4260
4261 /* hold our own reference */
4262 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4263 return 0;
4264
4265 err_clear:
4266 memset(ifmgd->bssid, 0, ETH_ALEN);
4267 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4268 ifmgd->auth_data = NULL;
4269 err_free:
4270 kfree(auth_data);
4271 return err;
4272 }
4273
4274 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4275 const u8 *wmm_param, int len)
4276 {
4277 const u8 *pos;
4278 size_t left;
4279
4280 if (len < 8)
4281 return false;
4282
4283 if (wmm_param[5] != 1 /* version */)
4284 return false;
4285
4286 pos = wmm_param + 8;
4287 left = len - 8;
4288
4289 for (; left >= 4; left -= 4, pos += 4) {
4290 u8 aifsn = pos[0] & 0x0f;
4291 u8 ecwmin = pos[1] & 0x0f;
4292 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4293 int aci = (pos[0] >> 5) & 0x03;
4294
4295 if (aifsn < 2) {
4296 sdata_info(sdata,
4297 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4298 aifsn, aci);
4299 return false;
4300 }
4301 if (ecwmin > ecwmax) {
4302 sdata_info(sdata,
4303 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4304 ecwmin, ecwmax, aci);
4305 return false;
4306 }
4307 }
4308
4309 return true;
4310 }
4311
4312 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4313 struct cfg80211_assoc_request *req)
4314 {
4315 struct ieee80211_local *local = sdata->local;
4316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4317 struct ieee80211_bss *bss = (void *)req->bss->priv;
4318 struct ieee80211_mgd_assoc_data *assoc_data;
4319 const struct cfg80211_bss_ies *beacon_ies;
4320 struct ieee80211_supported_band *sband;
4321 const u8 *ssidie, *ht_ie, *vht_ie;
4322 int i, err;
4323
4324 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4325 if (!assoc_data)
4326 return -ENOMEM;
4327
4328 rcu_read_lock();
4329 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4330 if (!ssidie) {
4331 rcu_read_unlock();
4332 kfree(assoc_data);
4333 return -EINVAL;
4334 }
4335 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4336 assoc_data->ssid_len = ssidie[1];
4337 rcu_read_unlock();
4338
4339 if (ifmgd->associated) {
4340 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4341
4342 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4343 WLAN_REASON_UNSPECIFIED,
4344 false, frame_buf);
4345
4346 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4347 sizeof(frame_buf));
4348 }
4349
4350 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4351 err = -EBUSY;
4352 goto err_free;
4353 }
4354
4355 if (ifmgd->assoc_data) {
4356 err = -EBUSY;
4357 goto err_free;
4358 }
4359
4360 if (ifmgd->auth_data) {
4361 bool match;
4362
4363 /* keep sta info, bssid if matching */
4364 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4365 ieee80211_destroy_auth_data(sdata, match);
4366 }
4367
4368 /* prepare assoc data */
4369
4370 ifmgd->beacon_crc_valid = false;
4371
4372 assoc_data->wmm = bss->wmm_used &&
4373 (local->hw.queues >= IEEE80211_NUM_ACS);
4374 if (assoc_data->wmm) {
4375 /* try to check validity of WMM params IE */
4376 const struct cfg80211_bss_ies *ies;
4377 const u8 *wp, *start, *end;
4378
4379 rcu_read_lock();
4380 ies = rcu_dereference(req->bss->ies);
4381 start = ies->data;
4382 end = start + ies->len;
4383
4384 while (true) {
4385 wp = cfg80211_find_vendor_ie(
4386 WLAN_OUI_MICROSOFT,
4387 WLAN_OUI_TYPE_MICROSOFT_WMM,
4388 start, end - start);
4389 if (!wp)
4390 break;
4391 start = wp + wp[1] + 2;
4392 /* if this IE is too short, try the next */
4393 if (wp[1] <= 4)
4394 continue;
4395 /* if this IE is WMM params, we found what we wanted */
4396 if (wp[6] == 1)
4397 break;
4398 }
4399
4400 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4401 wp[1] - 2)) {
4402 assoc_data->wmm = false;
4403 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4404 }
4405 rcu_read_unlock();
4406 }
4407
4408 /*
4409 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4410 * We still associate in non-HT mode (11a/b/g) if any one of these
4411 * ciphers is configured as pairwise.
4412 * We can set this to true for non-11n hardware, that'll be checked
4413 * separately along with the peer capabilities.
4414 */
4415 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4416 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4417 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4418 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4419 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4420 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4421 netdev_info(sdata->dev,
4422 "disabling HT/VHT due to WEP/TKIP use\n");
4423 }
4424 }
4425
4426 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4427 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4428 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4429 }
4430
4431 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4432 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4433
4434 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4435 sband = local->hw.wiphy->bands[req->bss->channel->band];
4436 if (!sband->ht_cap.ht_supported ||
4437 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4438 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4439 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4440 if (!bss->wmm_used &&
4441 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4442 netdev_info(sdata->dev,
4443 "disabling HT as WMM/QoS is not supported by the AP\n");
4444 }
4445
4446 /* disable VHT if we don't support it or the AP doesn't use WMM */
4447 if (!sband->vht_cap.vht_supported ||
4448 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4449 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4450 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4451 if (!bss->wmm_used &&
4452 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4453 netdev_info(sdata->dev,
4454 "disabling VHT as WMM/QoS is not supported by the AP\n");
4455 }
4456
4457 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4458 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4459 sizeof(ifmgd->ht_capa_mask));
4460
4461 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4462 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4463 sizeof(ifmgd->vht_capa_mask));
4464
4465 if (req->ie && req->ie_len) {
4466 memcpy(assoc_data->ie, req->ie, req->ie_len);
4467 assoc_data->ie_len = req->ie_len;
4468 }
4469
4470 assoc_data->bss = req->bss;
4471
4472 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4473 if (ifmgd->powersave)
4474 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4475 else
4476 sdata->smps_mode = IEEE80211_SMPS_OFF;
4477 } else
4478 sdata->smps_mode = ifmgd->req_smps;
4479
4480 assoc_data->capability = req->bss->capability;
4481 assoc_data->supp_rates = bss->supp_rates;
4482 assoc_data->supp_rates_len = bss->supp_rates_len;
4483
4484 rcu_read_lock();
4485 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4486 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4487 assoc_data->ap_ht_param =
4488 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4489 else
4490 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4491 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4492 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4493 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4494 sizeof(struct ieee80211_vht_cap));
4495 else
4496 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4497 rcu_read_unlock();
4498
4499 if (bss->wmm_used && bss->uapsd_supported &&
4500 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
4501 assoc_data->uapsd = true;
4502 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4503 } else {
4504 assoc_data->uapsd = false;
4505 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4506 }
4507
4508 if (req->prev_bssid)
4509 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4510
4511 if (req->use_mfp) {
4512 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4513 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4514 } else {
4515 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4516 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4517 }
4518
4519 if (req->flags & ASSOC_REQ_USE_RRM)
4520 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4521 else
4522 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4523
4524 if (req->crypto.control_port)
4525 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4526 else
4527 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4528
4529 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4530 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4531 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4532 sdata->vif.type);
4533
4534 /* kick off associate process */
4535
4536 ifmgd->assoc_data = assoc_data;
4537 ifmgd->dtim_period = 0;
4538 ifmgd->have_beacon = false;
4539
4540 err = ieee80211_prep_connection(sdata, req->bss, true);
4541 if (err)
4542 goto err_clear;
4543
4544 rcu_read_lock();
4545 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4546
4547 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4548 !beacon_ies) {
4549 /*
4550 * Wait up to one beacon interval ...
4551 * should this be more if we miss one?
4552 */
4553 sdata_info(sdata, "waiting for beacon from %pM\n",
4554 ifmgd->bssid);
4555 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4556 assoc_data->timeout_started = true;
4557 assoc_data->need_beacon = true;
4558 } else if (beacon_ies) {
4559 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4560 beacon_ies->data,
4561 beacon_ies->len);
4562 u8 dtim_count = 0;
4563
4564 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4565 const struct ieee80211_tim_ie *tim;
4566 tim = (void *)(tim_ie + 2);
4567 ifmgd->dtim_period = tim->dtim_period;
4568 dtim_count = tim->dtim_count;
4569 }
4570 ifmgd->have_beacon = true;
4571 assoc_data->timeout = jiffies;
4572 assoc_data->timeout_started = true;
4573
4574 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4575 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4576 sdata->vif.bss_conf.sync_device_ts =
4577 bss->device_ts_beacon;
4578 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4579 }
4580 } else {
4581 assoc_data->timeout = jiffies;
4582 assoc_data->timeout_started = true;
4583 }
4584 rcu_read_unlock();
4585
4586 run_again(sdata, assoc_data->timeout);
4587
4588 if (bss->corrupt_data) {
4589 char *corrupt_type = "data";
4590 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4591 if (bss->corrupt_data &
4592 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4593 corrupt_type = "beacon and probe response";
4594 else
4595 corrupt_type = "beacon";
4596 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4597 corrupt_type = "probe response";
4598 sdata_info(sdata, "associating with AP with corrupt %s\n",
4599 corrupt_type);
4600 }
4601
4602 return 0;
4603 err_clear:
4604 memset(ifmgd->bssid, 0, ETH_ALEN);
4605 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4606 ifmgd->assoc_data = NULL;
4607 err_free:
4608 kfree(assoc_data);
4609 return err;
4610 }
4611
4612 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4613 struct cfg80211_deauth_request *req)
4614 {
4615 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4616 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4617 bool tx = !req->local_state_change;
4618
4619 if (ifmgd->auth_data &&
4620 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4621 sdata_info(sdata,
4622 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4623 req->bssid, req->reason_code,
4624 ieee80211_get_reason_code_string(req->reason_code));
4625
4626 drv_mgd_prepare_tx(sdata->local, sdata);
4627 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4628 IEEE80211_STYPE_DEAUTH,
4629 req->reason_code, tx,
4630 frame_buf);
4631 ieee80211_destroy_auth_data(sdata, false);
4632 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4633 IEEE80211_DEAUTH_FRAME_LEN);
4634
4635 return 0;
4636 }
4637
4638 if (ifmgd->associated &&
4639 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4640 sdata_info(sdata,
4641 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4642 req->bssid, req->reason_code,
4643 ieee80211_get_reason_code_string(req->reason_code));
4644
4645 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4646 req->reason_code, tx, frame_buf);
4647 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4648 IEEE80211_DEAUTH_FRAME_LEN);
4649 return 0;
4650 }
4651
4652 return -ENOTCONN;
4653 }
4654
4655 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4656 struct cfg80211_disassoc_request *req)
4657 {
4658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4659 u8 bssid[ETH_ALEN];
4660 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4661
4662 /*
4663 * cfg80211 should catch this ... but it's racy since
4664 * we can receive a disassoc frame, process it, hand it
4665 * to cfg80211 while that's in a locked section already
4666 * trying to tell us that the user wants to disconnect.
4667 */
4668 if (ifmgd->associated != req->bss)
4669 return -ENOLINK;
4670
4671 sdata_info(sdata,
4672 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4673 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4674
4675 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4676 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4677 req->reason_code, !req->local_state_change,
4678 frame_buf);
4679
4680 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4681 IEEE80211_DEAUTH_FRAME_LEN);
4682
4683 return 0;
4684 }
4685
4686 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4687 {
4688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4689
4690 /*
4691 * Make sure some work items will not run after this,
4692 * they will not do anything but might not have been
4693 * cancelled when disconnecting.
4694 */
4695 cancel_work_sync(&ifmgd->monitor_work);
4696 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4697 cancel_work_sync(&ifmgd->request_smps_work);
4698 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4699 cancel_work_sync(&ifmgd->chswitch_work);
4700 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4701
4702 sdata_lock(sdata);
4703 if (ifmgd->assoc_data) {
4704 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4705 ieee80211_destroy_assoc_data(sdata, false);
4706 cfg80211_assoc_timeout(sdata->dev, bss);
4707 }
4708 if (ifmgd->auth_data)
4709 ieee80211_destroy_auth_data(sdata, false);
4710 del_timer_sync(&ifmgd->timer);
4711 sdata_unlock(sdata);
4712 }
4713
4714 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4715 enum nl80211_cqm_rssi_threshold_event rssi_event,
4716 gfp_t gfp)
4717 {
4718 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4719
4720 trace_api_cqm_rssi_notify(sdata, rssi_event);
4721
4722 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4723 }
4724 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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