mac80211: implement SMPS for AP
[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 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "led.h"
32
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
42
43 static int max_nullfunc_tries = 2;
44 module_param(max_nullfunc_tries, int, 0644);
45 MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
47
48 static int max_probe_tries = 5;
49 module_param(max_probe_tries, int, 0644);
50 MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
52
53 /*
54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
60 */
61 static int beacon_loss_count = 7;
62 module_param(beacon_loss_count, int, 0644);
63 MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
65
66 /*
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
69 */
70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
71 /*
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
75 */
76 static int probe_wait_ms = 500;
77 module_param(probe_wait_ms, int, 0644);
78 MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
81
82 /*
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
85 * between 1 and 15.
86 */
87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
88
89 /*
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
92 */
93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
94
95 /*
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
103 * do that.
104 */
105 static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
107 {
108 sdata_assert_lock(sdata);
109
110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
113 }
114
115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
116 {
117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
118 return;
119
120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
121 return;
122
123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
125 }
126
127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
128 {
129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
130
131 if (unlikely(!sdata->u.mgd.associated))
132 return;
133
134 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
135 return;
136
137 mod_timer(&sdata->u.mgd.conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
139
140 ifmgd->probe_send_count = 0;
141 }
142
143 static int ecw2cw(int ecw)
144 {
145 return (1 << ecw) - 1;
146 }
147
148 static u32
149 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
150 struct ieee80211_supported_band *sband,
151 struct ieee80211_channel *channel,
152 const struct ieee80211_ht_operation *ht_oper,
153 const struct ieee80211_vht_operation *vht_oper,
154 struct cfg80211_chan_def *chandef, bool tracking)
155 {
156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157 struct cfg80211_chan_def vht_chandef;
158 u32 ht_cfreq, ret;
159
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
165 if (!ht_oper || !sband->ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
173 channel->band);
174 /* check that channel matches the right operating channel */
175 if (!tracking && channel->center_freq != ht_cfreq) {
176 /*
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
181 * it should be OK.
182 */
183 sdata_info(sdata,
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
188 goto out;
189 }
190
191 /* check 40 MHz support, if we have it */
192 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
193 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
195 chandef->width = NL80211_CHAN_WIDTH_40;
196 chandef->center_freq1 += 10;
197 break;
198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
199 chandef->width = NL80211_CHAN_WIDTH_40;
200 chandef->center_freq1 -= 10;
201 break;
202 }
203 } else {
204 /* 40 MHz (and 80 MHz) must be supported for VHT */
205 ret = IEEE80211_STA_DISABLE_VHT;
206 /* also mark 40 MHz disabled */
207 ret |= IEEE80211_STA_DISABLE_40MHZ;
208 goto out;
209 }
210
211 if (!vht_oper || !sband->vht_cap.vht_supported) {
212 ret = IEEE80211_STA_DISABLE_VHT;
213 goto out;
214 }
215
216 vht_chandef.chan = channel;
217 vht_chandef.center_freq1 =
218 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
219 channel->band);
220 vht_chandef.center_freq2 = 0;
221
222 switch (vht_oper->chan_width) {
223 case IEEE80211_VHT_CHANWIDTH_USE_HT:
224 vht_chandef.width = chandef->width;
225 break;
226 case IEEE80211_VHT_CHANWIDTH_80MHZ:
227 vht_chandef.width = NL80211_CHAN_WIDTH_80;
228 break;
229 case IEEE80211_VHT_CHANWIDTH_160MHZ:
230 vht_chandef.width = NL80211_CHAN_WIDTH_160;
231 break;
232 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
233 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
234 vht_chandef.center_freq2 =
235 ieee80211_channel_to_frequency(
236 vht_oper->center_freq_seg2_idx,
237 channel->band);
238 break;
239 default:
240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
241 sdata_info(sdata,
242 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
243 vht_oper->chan_width);
244 ret = IEEE80211_STA_DISABLE_VHT;
245 goto out;
246 }
247
248 if (!cfg80211_chandef_valid(&vht_chandef)) {
249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
250 sdata_info(sdata,
251 "AP VHT information is invalid, disable VHT\n");
252 ret = IEEE80211_STA_DISABLE_VHT;
253 goto out;
254 }
255
256 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
257 ret = 0;
258 goto out;
259 }
260
261 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
262 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
263 sdata_info(sdata,
264 "AP VHT information doesn't match HT, disable VHT\n");
265 ret = IEEE80211_STA_DISABLE_VHT;
266 goto out;
267 }
268
269 *chandef = vht_chandef;
270
271 ret = 0;
272
273 out:
274 /* don't print the message below for VHT mismatch if VHT is disabled */
275 if (ret & IEEE80211_STA_DISABLE_VHT)
276 vht_chandef = *chandef;
277
278 /*
279 * Ignore the DISABLED flag when we're already connected and only
280 * tracking the APs beacon for bandwidth changes - otherwise we
281 * might get disconnected here if we connect to an AP, update our
282 * regulatory information based on the AP's country IE and the
283 * information we have is wrong/outdated and disables the channel
284 * that we're actually using for the connection to the AP.
285 */
286 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
287 tracking ? 0 :
288 IEEE80211_CHAN_DISABLED)) {
289 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
290 ret = IEEE80211_STA_DISABLE_HT |
291 IEEE80211_STA_DISABLE_VHT;
292 break;
293 }
294
295 ret |= ieee80211_chandef_downgrade(chandef);
296 }
297
298 if (chandef->width != vht_chandef.width && !tracking)
299 sdata_info(sdata,
300 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
301
302 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
303 return ret;
304 }
305
306 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
307 struct sta_info *sta,
308 const struct ieee80211_ht_operation *ht_oper,
309 const struct ieee80211_vht_operation *vht_oper,
310 const u8 *bssid, u32 *changed)
311 {
312 struct ieee80211_local *local = sdata->local;
313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
314 struct ieee80211_supported_band *sband;
315 struct ieee80211_channel *chan;
316 struct cfg80211_chan_def chandef;
317 u16 ht_opmode;
318 u32 flags;
319 enum ieee80211_sta_rx_bandwidth new_sta_bw;
320 int ret;
321
322 /* if HT was/is disabled, don't track any bandwidth changes */
323 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
324 return 0;
325
326 /* don't check VHT if we associated as non-VHT station */
327 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
328 vht_oper = NULL;
329
330 if (WARN_ON_ONCE(!sta))
331 return -EINVAL;
332
333 chan = sdata->vif.bss_conf.chandef.chan;
334 sband = local->hw.wiphy->bands[chan->band];
335
336 /* calculate new channel (type) based on HT/VHT operation IEs */
337 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
338 vht_oper, &chandef, true);
339
340 /*
341 * Downgrade the new channel if we associated with restricted
342 * capabilities. For example, if we associated as a 20 MHz STA
343 * to a 40 MHz AP (due to regulatory, capabilities or config
344 * reasons) then switching to a 40 MHz channel now won't do us
345 * any good -- we couldn't use it with the AP.
346 */
347 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
348 chandef.width == NL80211_CHAN_WIDTH_80P80)
349 flags |= ieee80211_chandef_downgrade(&chandef);
350 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
351 chandef.width == NL80211_CHAN_WIDTH_160)
352 flags |= ieee80211_chandef_downgrade(&chandef);
353 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
354 chandef.width > NL80211_CHAN_WIDTH_20)
355 flags |= ieee80211_chandef_downgrade(&chandef);
356
357 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
358 return 0;
359
360 sdata_info(sdata,
361 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
362 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
363 chandef.center_freq1, chandef.center_freq2);
364
365 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
366 IEEE80211_STA_DISABLE_VHT |
367 IEEE80211_STA_DISABLE_40MHZ |
368 IEEE80211_STA_DISABLE_80P80MHZ |
369 IEEE80211_STA_DISABLE_160MHZ)) ||
370 !cfg80211_chandef_valid(&chandef)) {
371 sdata_info(sdata,
372 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
373 ifmgd->bssid);
374 return -EINVAL;
375 }
376
377 switch (chandef.width) {
378 case NL80211_CHAN_WIDTH_20_NOHT:
379 case NL80211_CHAN_WIDTH_20:
380 new_sta_bw = IEEE80211_STA_RX_BW_20;
381 break;
382 case NL80211_CHAN_WIDTH_40:
383 new_sta_bw = IEEE80211_STA_RX_BW_40;
384 break;
385 case NL80211_CHAN_WIDTH_80:
386 new_sta_bw = IEEE80211_STA_RX_BW_80;
387 break;
388 case NL80211_CHAN_WIDTH_80P80:
389 case NL80211_CHAN_WIDTH_160:
390 new_sta_bw = IEEE80211_STA_RX_BW_160;
391 break;
392 default:
393 return -EINVAL;
394 }
395
396 if (new_sta_bw > sta->cur_max_bandwidth)
397 new_sta_bw = sta->cur_max_bandwidth;
398
399 if (new_sta_bw < sta->sta.bandwidth) {
400 sta->sta.bandwidth = new_sta_bw;
401 rate_control_rate_update(local, sband, sta,
402 IEEE80211_RC_BW_CHANGED);
403 }
404
405 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
406 if (ret) {
407 sdata_info(sdata,
408 "AP %pM changed bandwidth to incompatible one - disconnect\n",
409 ifmgd->bssid);
410 return ret;
411 }
412
413 if (new_sta_bw > sta->sta.bandwidth) {
414 sta->sta.bandwidth = new_sta_bw;
415 rate_control_rate_update(local, sband, sta,
416 IEEE80211_RC_BW_CHANGED);
417 }
418
419 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
420
421 /* if bss configuration changed store the new one */
422 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
423 *changed |= BSS_CHANGED_HT;
424 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
425 }
426
427 return 0;
428 }
429
430 /* frame sending functions */
431
432 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
433 struct sk_buff *skb, u8 ap_ht_param,
434 struct ieee80211_supported_band *sband,
435 struct ieee80211_channel *channel,
436 enum ieee80211_smps_mode smps)
437 {
438 u8 *pos;
439 u32 flags = channel->flags;
440 u16 cap;
441 struct ieee80211_sta_ht_cap ht_cap;
442
443 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
444
445 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
446 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
447
448 /* determine capability flags */
449 cap = ht_cap.cap;
450
451 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
452 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
453 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
454 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
455 cap &= ~IEEE80211_HT_CAP_SGI_40;
456 }
457 break;
458 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
459 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
460 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
461 cap &= ~IEEE80211_HT_CAP_SGI_40;
462 }
463 break;
464 }
465
466 /*
467 * If 40 MHz was disabled associate as though we weren't
468 * capable of 40 MHz -- some broken APs will never fall
469 * back to trying to transmit in 20 MHz.
470 */
471 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
472 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
473 cap &= ~IEEE80211_HT_CAP_SGI_40;
474 }
475
476 /* set SM PS mode properly */
477 cap &= ~IEEE80211_HT_CAP_SM_PS;
478 switch (smps) {
479 case IEEE80211_SMPS_AUTOMATIC:
480 case IEEE80211_SMPS_NUM_MODES:
481 WARN_ON(1);
482 case IEEE80211_SMPS_OFF:
483 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
484 IEEE80211_HT_CAP_SM_PS_SHIFT;
485 break;
486 case IEEE80211_SMPS_STATIC:
487 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
488 IEEE80211_HT_CAP_SM_PS_SHIFT;
489 break;
490 case IEEE80211_SMPS_DYNAMIC:
491 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
492 IEEE80211_HT_CAP_SM_PS_SHIFT;
493 break;
494 }
495
496 /* reserve and fill IE */
497 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
498 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
499 }
500
501 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
502 struct sk_buff *skb,
503 struct ieee80211_supported_band *sband,
504 struct ieee80211_vht_cap *ap_vht_cap)
505 {
506 u8 *pos;
507 u32 cap;
508 struct ieee80211_sta_vht_cap vht_cap;
509
510 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
511
512 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
513 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
514
515 /* determine capability flags */
516 cap = vht_cap.cap;
517
518 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
519 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
520 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
521 }
522
523 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
524 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
525 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
526 }
527
528 /*
529 * Some APs apparently get confused if our capabilities are better
530 * than theirs, so restrict what we advertise in the assoc request.
531 */
532 if (!(ap_vht_cap->vht_cap_info &
533 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
534 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
535
536 /* reserve and fill IE */
537 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
538 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
539 }
540
541 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
542 {
543 struct ieee80211_local *local = sdata->local;
544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
545 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
546 struct sk_buff *skb;
547 struct ieee80211_mgmt *mgmt;
548 u8 *pos, qos_info;
549 size_t offset = 0, noffset;
550 int i, count, rates_len, supp_rates_len, shift;
551 u16 capab;
552 struct ieee80211_supported_band *sband;
553 struct ieee80211_chanctx_conf *chanctx_conf;
554 struct ieee80211_channel *chan;
555 u32 rate_flags, rates = 0;
556
557 sdata_assert_lock(sdata);
558
559 rcu_read_lock();
560 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
561 if (WARN_ON(!chanctx_conf)) {
562 rcu_read_unlock();
563 return;
564 }
565 chan = chanctx_conf->def.chan;
566 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
567 rcu_read_unlock();
568 sband = local->hw.wiphy->bands[chan->band];
569 shift = ieee80211_vif_get_shift(&sdata->vif);
570
571 if (assoc_data->supp_rates_len) {
572 /*
573 * Get all rates supported by the device and the AP as
574 * some APs don't like getting a superset of their rates
575 * in the association request (e.g. D-Link DAP 1353 in
576 * b-only mode)...
577 */
578 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
579 assoc_data->supp_rates,
580 assoc_data->supp_rates_len,
581 &rates);
582 } else {
583 /*
584 * In case AP not provide any supported rates information
585 * before association, we send information element(s) with
586 * all rates that we support.
587 */
588 rates_len = 0;
589 for (i = 0; i < sband->n_bitrates; i++) {
590 if ((rate_flags & sband->bitrates[i].flags)
591 != rate_flags)
592 continue;
593 rates |= BIT(i);
594 rates_len++;
595 }
596 }
597
598 skb = alloc_skb(local->hw.extra_tx_headroom +
599 sizeof(*mgmt) + /* bit too much but doesn't matter */
600 2 + assoc_data->ssid_len + /* SSID */
601 4 + rates_len + /* (extended) rates */
602 4 + /* power capability */
603 2 + 2 * sband->n_channels + /* supported channels */
604 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
605 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
606 assoc_data->ie_len + /* extra IEs */
607 9, /* WMM */
608 GFP_KERNEL);
609 if (!skb)
610 return;
611
612 skb_reserve(skb, local->hw.extra_tx_headroom);
613
614 capab = WLAN_CAPABILITY_ESS;
615
616 if (sband->band == IEEE80211_BAND_2GHZ) {
617 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
618 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
619 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
620 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
621 }
622
623 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
624 capab |= WLAN_CAPABILITY_PRIVACY;
625
626 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
627 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
628 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
629
630 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
631 memset(mgmt, 0, 24);
632 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
633 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
634 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
635
636 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
637 skb_put(skb, 10);
638 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
639 IEEE80211_STYPE_REASSOC_REQ);
640 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
641 mgmt->u.reassoc_req.listen_interval =
642 cpu_to_le16(local->hw.conf.listen_interval);
643 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
644 ETH_ALEN);
645 } else {
646 skb_put(skb, 4);
647 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
648 IEEE80211_STYPE_ASSOC_REQ);
649 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
650 mgmt->u.assoc_req.listen_interval =
651 cpu_to_le16(local->hw.conf.listen_interval);
652 }
653
654 /* SSID */
655 pos = skb_put(skb, 2 + assoc_data->ssid_len);
656 *pos++ = WLAN_EID_SSID;
657 *pos++ = assoc_data->ssid_len;
658 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
659
660 /* add all rates which were marked to be used above */
661 supp_rates_len = rates_len;
662 if (supp_rates_len > 8)
663 supp_rates_len = 8;
664
665 pos = skb_put(skb, supp_rates_len + 2);
666 *pos++ = WLAN_EID_SUPP_RATES;
667 *pos++ = supp_rates_len;
668
669 count = 0;
670 for (i = 0; i < sband->n_bitrates; i++) {
671 if (BIT(i) & rates) {
672 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
673 5 * (1 << shift));
674 *pos++ = (u8) rate;
675 if (++count == 8)
676 break;
677 }
678 }
679
680 if (rates_len > count) {
681 pos = skb_put(skb, rates_len - count + 2);
682 *pos++ = WLAN_EID_EXT_SUPP_RATES;
683 *pos++ = rates_len - count;
684
685 for (i++; i < sband->n_bitrates; i++) {
686 if (BIT(i) & rates) {
687 int rate;
688 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
689 5 * (1 << shift));
690 *pos++ = (u8) rate;
691 }
692 }
693 }
694
695 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
696 /* 1. power capabilities */
697 pos = skb_put(skb, 4);
698 *pos++ = WLAN_EID_PWR_CAPABILITY;
699 *pos++ = 2;
700 *pos++ = 0; /* min tx power */
701 /* max tx power */
702 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
703
704 /* 2. supported channels */
705 /* TODO: get this in reg domain format */
706 pos = skb_put(skb, 2 * sband->n_channels + 2);
707 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
708 *pos++ = 2 * sband->n_channels;
709 for (i = 0; i < sband->n_channels; i++) {
710 *pos++ = ieee80211_frequency_to_channel(
711 sband->channels[i].center_freq);
712 *pos++ = 1; /* one channel in the subband*/
713 }
714 }
715
716 /* if present, add any custom IEs that go before HT */
717 if (assoc_data->ie_len && assoc_data->ie) {
718 static const u8 before_ht[] = {
719 WLAN_EID_SSID,
720 WLAN_EID_SUPP_RATES,
721 WLAN_EID_EXT_SUPP_RATES,
722 WLAN_EID_PWR_CAPABILITY,
723 WLAN_EID_SUPPORTED_CHANNELS,
724 WLAN_EID_RSN,
725 WLAN_EID_QOS_CAPA,
726 WLAN_EID_RRM_ENABLED_CAPABILITIES,
727 WLAN_EID_MOBILITY_DOMAIN,
728 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
729 };
730 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
731 before_ht, ARRAY_SIZE(before_ht),
732 offset);
733 pos = skb_put(skb, noffset - offset);
734 memcpy(pos, assoc_data->ie + offset, noffset - offset);
735 offset = noffset;
736 }
737
738 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
739 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
740 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
741
742 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
743 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
744 sband, chan, sdata->smps_mode);
745
746 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
747 ieee80211_add_vht_ie(sdata, skb, sband,
748 &assoc_data->ap_vht_cap);
749
750 /* if present, add any custom non-vendor IEs that go after HT */
751 if (assoc_data->ie_len && assoc_data->ie) {
752 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
753 assoc_data->ie_len,
754 offset);
755 pos = skb_put(skb, noffset - offset);
756 memcpy(pos, assoc_data->ie + offset, noffset - offset);
757 offset = noffset;
758 }
759
760 if (assoc_data->wmm) {
761 if (assoc_data->uapsd) {
762 qos_info = ifmgd->uapsd_queues;
763 qos_info |= (ifmgd->uapsd_max_sp_len <<
764 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
765 } else {
766 qos_info = 0;
767 }
768
769 pos = skb_put(skb, 9);
770 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
771 *pos++ = 7; /* len */
772 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
773 *pos++ = 0x50;
774 *pos++ = 0xf2;
775 *pos++ = 2; /* WME */
776 *pos++ = 0; /* WME info */
777 *pos++ = 1; /* WME ver */
778 *pos++ = qos_info;
779 }
780
781 /* add any remaining custom (i.e. vendor specific here) IEs */
782 if (assoc_data->ie_len && assoc_data->ie) {
783 noffset = assoc_data->ie_len;
784 pos = skb_put(skb, noffset - offset);
785 memcpy(pos, assoc_data->ie + offset, noffset - offset);
786 }
787
788 drv_mgd_prepare_tx(local, sdata);
789
790 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
791 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
792 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
793 IEEE80211_TX_INTFL_MLME_CONN_TX;
794 ieee80211_tx_skb(sdata, skb);
795 }
796
797 void ieee80211_send_pspoll(struct ieee80211_local *local,
798 struct ieee80211_sub_if_data *sdata)
799 {
800 struct ieee80211_pspoll *pspoll;
801 struct sk_buff *skb;
802
803 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
804 if (!skb)
805 return;
806
807 pspoll = (struct ieee80211_pspoll *) skb->data;
808 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
809
810 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
811 ieee80211_tx_skb(sdata, skb);
812 }
813
814 void ieee80211_send_nullfunc(struct ieee80211_local *local,
815 struct ieee80211_sub_if_data *sdata,
816 int powersave)
817 {
818 struct sk_buff *skb;
819 struct ieee80211_hdr_3addr *nullfunc;
820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
821
822 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
823 if (!skb)
824 return;
825
826 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
827 if (powersave)
828 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
829
830 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
831 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
832
833 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
834 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
835
836 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
837 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
838
839 ieee80211_tx_skb(sdata, skb);
840 }
841
842 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
843 struct ieee80211_sub_if_data *sdata)
844 {
845 struct sk_buff *skb;
846 struct ieee80211_hdr *nullfunc;
847 __le16 fc;
848
849 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
850 return;
851
852 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
853 if (!skb)
854 return;
855
856 skb_reserve(skb, local->hw.extra_tx_headroom);
857
858 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
859 memset(nullfunc, 0, 30);
860 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
861 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
862 nullfunc->frame_control = fc;
863 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
864 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
865 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
866 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
867
868 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
869 ieee80211_tx_skb(sdata, skb);
870 }
871
872 /* spectrum management related things */
873 static void ieee80211_chswitch_work(struct work_struct *work)
874 {
875 struct ieee80211_sub_if_data *sdata =
876 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
877 struct ieee80211_local *local = sdata->local;
878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
879 u32 changed = 0;
880 int ret;
881
882 if (!ieee80211_sdata_running(sdata))
883 return;
884
885 sdata_lock(sdata);
886 if (!ifmgd->associated)
887 goto out;
888
889 ret = ieee80211_vif_change_channel(sdata, &local->csa_chandef,
890 &changed);
891 if (ret) {
892 sdata_info(sdata,
893 "vif channel switch failed, disconnecting\n");
894 ieee80211_queue_work(&sdata->local->hw,
895 &ifmgd->csa_connection_drop_work);
896 goto out;
897 }
898
899 if (!local->use_chanctx) {
900 local->_oper_chandef = local->csa_chandef;
901 /* Call "hw_config" only if doing sw channel switch.
902 * Otherwise update the channel directly
903 */
904 if (!local->ops->channel_switch)
905 ieee80211_hw_config(local, 0);
906 else
907 local->hw.conf.chandef = local->_oper_chandef;
908 }
909
910 /* XXX: shouldn't really modify cfg80211-owned data! */
911 ifmgd->associated->channel = local->csa_chandef.chan;
912
913 /* XXX: wait for a beacon first? */
914 ieee80211_wake_queues_by_reason(&local->hw,
915 IEEE80211_MAX_QUEUE_MAP,
916 IEEE80211_QUEUE_STOP_REASON_CSA);
917
918 ieee80211_bss_info_change_notify(sdata, changed);
919
920 out:
921 sdata->vif.csa_active = false;
922 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
923 sdata_unlock(sdata);
924 }
925
926 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
927 {
928 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
930
931 trace_api_chswitch_done(sdata, success);
932 if (!success) {
933 sdata_info(sdata,
934 "driver channel switch failed, disconnecting\n");
935 ieee80211_queue_work(&sdata->local->hw,
936 &ifmgd->csa_connection_drop_work);
937 } else {
938 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
939 }
940 }
941 EXPORT_SYMBOL(ieee80211_chswitch_done);
942
943 static void ieee80211_chswitch_timer(unsigned long data)
944 {
945 struct ieee80211_sub_if_data *sdata =
946 (struct ieee80211_sub_if_data *) data;
947
948 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
949 }
950
951 static void
952 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
953 u64 timestamp, struct ieee802_11_elems *elems,
954 bool beacon)
955 {
956 struct ieee80211_local *local = sdata->local;
957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
958 struct cfg80211_bss *cbss = ifmgd->associated;
959 struct ieee80211_chanctx *chanctx;
960 enum ieee80211_band current_band;
961 u8 count;
962 u8 mode;
963 struct cfg80211_chan_def new_chandef = {};
964 int res;
965
966 sdata_assert_lock(sdata);
967
968 if (!cbss)
969 return;
970
971 if (local->scanning)
972 return;
973
974 /* disregard subsequent announcements if we are already processing */
975 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
976 return;
977
978 current_band = cbss->channel->band;
979 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
980 ifmgd->flags,
981 ifmgd->associated->bssid, &count,
982 &mode, &new_chandef);
983 if (res < 0)
984 ieee80211_queue_work(&local->hw,
985 &ifmgd->csa_connection_drop_work);
986 if (res)
987 return;
988
989 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
990 IEEE80211_CHAN_DISABLED)) {
991 sdata_info(sdata,
992 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
993 ifmgd->associated->bssid,
994 new_chandef.chan->center_freq,
995 new_chandef.width, new_chandef.center_freq1,
996 new_chandef.center_freq2);
997 ieee80211_queue_work(&local->hw,
998 &ifmgd->csa_connection_drop_work);
999 return;
1000 }
1001
1002 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1003 sdata->vif.csa_active = true;
1004
1005 mutex_lock(&local->chanctx_mtx);
1006 if (local->use_chanctx) {
1007 u32 num_chanctx = 0;
1008 list_for_each_entry(chanctx, &local->chanctx_list, list)
1009 num_chanctx++;
1010
1011 if (num_chanctx > 1 ||
1012 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1013 sdata_info(sdata,
1014 "not handling chan-switch with channel contexts\n");
1015 ieee80211_queue_work(&local->hw,
1016 &ifmgd->csa_connection_drop_work);
1017 mutex_unlock(&local->chanctx_mtx);
1018 return;
1019 }
1020 }
1021
1022 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1023 ieee80211_queue_work(&local->hw,
1024 &ifmgd->csa_connection_drop_work);
1025 mutex_unlock(&local->chanctx_mtx);
1026 return;
1027 }
1028 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1029 struct ieee80211_chanctx, conf);
1030 if (chanctx->refcount > 1) {
1031 sdata_info(sdata,
1032 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1033 ieee80211_queue_work(&local->hw,
1034 &ifmgd->csa_connection_drop_work);
1035 mutex_unlock(&local->chanctx_mtx);
1036 return;
1037 }
1038 mutex_unlock(&local->chanctx_mtx);
1039
1040 local->csa_chandef = new_chandef;
1041
1042 if (mode)
1043 ieee80211_stop_queues_by_reason(&local->hw,
1044 IEEE80211_MAX_QUEUE_MAP,
1045 IEEE80211_QUEUE_STOP_REASON_CSA);
1046
1047 if (local->ops->channel_switch) {
1048 /* use driver's channel switch callback */
1049 struct ieee80211_channel_switch ch_switch = {
1050 .timestamp = timestamp,
1051 .block_tx = mode,
1052 .chandef = new_chandef,
1053 .count = count,
1054 };
1055
1056 drv_channel_switch(local, &ch_switch);
1057 return;
1058 }
1059
1060 /* channel switch handled in software */
1061 if (count <= 1)
1062 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1063 else
1064 mod_timer(&ifmgd->chswitch_timer,
1065 TU_TO_EXP_TIME(count * cbss->beacon_interval));
1066 }
1067
1068 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1069 struct ieee80211_channel *channel,
1070 const u8 *country_ie, u8 country_ie_len,
1071 const u8 *pwr_constr_elem)
1072 {
1073 struct ieee80211_country_ie_triplet *triplet;
1074 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1075 int i, chan_pwr, chan_increment, new_ap_level;
1076 bool have_chan_pwr = false;
1077
1078 /* Invalid IE */
1079 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1080 return 0;
1081
1082 triplet = (void *)(country_ie + 3);
1083 country_ie_len -= 3;
1084
1085 switch (channel->band) {
1086 default:
1087 WARN_ON_ONCE(1);
1088 /* fall through */
1089 case IEEE80211_BAND_2GHZ:
1090 case IEEE80211_BAND_60GHZ:
1091 chan_increment = 1;
1092 break;
1093 case IEEE80211_BAND_5GHZ:
1094 chan_increment = 4;
1095 break;
1096 }
1097
1098 /* find channel */
1099 while (country_ie_len >= 3) {
1100 u8 first_channel = triplet->chans.first_channel;
1101
1102 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1103 goto next;
1104
1105 for (i = 0; i < triplet->chans.num_channels; i++) {
1106 if (first_channel + i * chan_increment == chan) {
1107 have_chan_pwr = true;
1108 chan_pwr = triplet->chans.max_power;
1109 break;
1110 }
1111 }
1112 if (have_chan_pwr)
1113 break;
1114
1115 next:
1116 triplet++;
1117 country_ie_len -= 3;
1118 }
1119
1120 if (!have_chan_pwr)
1121 return 0;
1122
1123 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1124
1125 if (sdata->ap_power_level == new_ap_level)
1126 return 0;
1127
1128 sdata_info(sdata,
1129 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1130 new_ap_level, chan_pwr, *pwr_constr_elem,
1131 sdata->u.mgd.bssid);
1132 sdata->ap_power_level = new_ap_level;
1133 if (__ieee80211_recalc_txpower(sdata))
1134 return BSS_CHANGED_TXPOWER;
1135 return 0;
1136 }
1137
1138 /* powersave */
1139 static void ieee80211_enable_ps(struct ieee80211_local *local,
1140 struct ieee80211_sub_if_data *sdata)
1141 {
1142 struct ieee80211_conf *conf = &local->hw.conf;
1143
1144 /*
1145 * If we are scanning right now then the parameters will
1146 * take effect when scan finishes.
1147 */
1148 if (local->scanning)
1149 return;
1150
1151 if (conf->dynamic_ps_timeout > 0 &&
1152 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1153 mod_timer(&local->dynamic_ps_timer, jiffies +
1154 msecs_to_jiffies(conf->dynamic_ps_timeout));
1155 } else {
1156 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1157 ieee80211_send_nullfunc(local, sdata, 1);
1158
1159 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1160 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1161 return;
1162
1163 conf->flags |= IEEE80211_CONF_PS;
1164 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1165 }
1166 }
1167
1168 static void ieee80211_change_ps(struct ieee80211_local *local)
1169 {
1170 struct ieee80211_conf *conf = &local->hw.conf;
1171
1172 if (local->ps_sdata) {
1173 ieee80211_enable_ps(local, local->ps_sdata);
1174 } else if (conf->flags & IEEE80211_CONF_PS) {
1175 conf->flags &= ~IEEE80211_CONF_PS;
1176 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1177 del_timer_sync(&local->dynamic_ps_timer);
1178 cancel_work_sync(&local->dynamic_ps_enable_work);
1179 }
1180 }
1181
1182 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1183 {
1184 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1185 struct sta_info *sta = NULL;
1186 bool authorized = false;
1187
1188 if (!mgd->powersave)
1189 return false;
1190
1191 if (mgd->broken_ap)
1192 return false;
1193
1194 if (!mgd->associated)
1195 return false;
1196
1197 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1198 return false;
1199
1200 if (!mgd->have_beacon)
1201 return false;
1202
1203 rcu_read_lock();
1204 sta = sta_info_get(sdata, mgd->bssid);
1205 if (sta)
1206 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1207 rcu_read_unlock();
1208
1209 return authorized;
1210 }
1211
1212 /* need to hold RTNL or interface lock */
1213 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1214 {
1215 struct ieee80211_sub_if_data *sdata, *found = NULL;
1216 int count = 0;
1217 int timeout;
1218
1219 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1220 local->ps_sdata = NULL;
1221 return;
1222 }
1223
1224 list_for_each_entry(sdata, &local->interfaces, list) {
1225 if (!ieee80211_sdata_running(sdata))
1226 continue;
1227 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1228 /* If an AP vif is found, then disable PS
1229 * by setting the count to zero thereby setting
1230 * ps_sdata to NULL.
1231 */
1232 count = 0;
1233 break;
1234 }
1235 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1236 continue;
1237 found = sdata;
1238 count++;
1239 }
1240
1241 if (count == 1 && ieee80211_powersave_allowed(found)) {
1242 s32 beaconint_us;
1243
1244 if (latency < 0)
1245 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1246
1247 beaconint_us = ieee80211_tu_to_usec(
1248 found->vif.bss_conf.beacon_int);
1249
1250 timeout = local->dynamic_ps_forced_timeout;
1251 if (timeout < 0) {
1252 /*
1253 * Go to full PSM if the user configures a very low
1254 * latency requirement.
1255 * The 2000 second value is there for compatibility
1256 * until the PM_QOS_NETWORK_LATENCY is configured
1257 * with real values.
1258 */
1259 if (latency > (1900 * USEC_PER_MSEC) &&
1260 latency != (2000 * USEC_PER_SEC))
1261 timeout = 0;
1262 else
1263 timeout = 100;
1264 }
1265 local->hw.conf.dynamic_ps_timeout = timeout;
1266
1267 if (beaconint_us > latency) {
1268 local->ps_sdata = NULL;
1269 } else {
1270 int maxslp = 1;
1271 u8 dtimper = found->u.mgd.dtim_period;
1272
1273 /* If the TIM IE is invalid, pretend the value is 1 */
1274 if (!dtimper)
1275 dtimper = 1;
1276 else if (dtimper > 1)
1277 maxslp = min_t(int, dtimper,
1278 latency / beaconint_us);
1279
1280 local->hw.conf.max_sleep_period = maxslp;
1281 local->hw.conf.ps_dtim_period = dtimper;
1282 local->ps_sdata = found;
1283 }
1284 } else {
1285 local->ps_sdata = NULL;
1286 }
1287
1288 ieee80211_change_ps(local);
1289 }
1290
1291 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1292 {
1293 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1294
1295 if (sdata->vif.bss_conf.ps != ps_allowed) {
1296 sdata->vif.bss_conf.ps = ps_allowed;
1297 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1298 }
1299 }
1300
1301 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1302 {
1303 struct ieee80211_local *local =
1304 container_of(work, struct ieee80211_local,
1305 dynamic_ps_disable_work);
1306
1307 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1308 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1309 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1310 }
1311
1312 ieee80211_wake_queues_by_reason(&local->hw,
1313 IEEE80211_MAX_QUEUE_MAP,
1314 IEEE80211_QUEUE_STOP_REASON_PS);
1315 }
1316
1317 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1318 {
1319 struct ieee80211_local *local =
1320 container_of(work, struct ieee80211_local,
1321 dynamic_ps_enable_work);
1322 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1323 struct ieee80211_if_managed *ifmgd;
1324 unsigned long flags;
1325 int q;
1326
1327 /* can only happen when PS was just disabled anyway */
1328 if (!sdata)
1329 return;
1330
1331 ifmgd = &sdata->u.mgd;
1332
1333 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1334 return;
1335
1336 if (local->hw.conf.dynamic_ps_timeout > 0) {
1337 /* don't enter PS if TX frames are pending */
1338 if (drv_tx_frames_pending(local)) {
1339 mod_timer(&local->dynamic_ps_timer, jiffies +
1340 msecs_to_jiffies(
1341 local->hw.conf.dynamic_ps_timeout));
1342 return;
1343 }
1344
1345 /*
1346 * transmission can be stopped by others which leads to
1347 * dynamic_ps_timer expiry. Postpone the ps timer if it
1348 * is not the actual idle state.
1349 */
1350 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1351 for (q = 0; q < local->hw.queues; q++) {
1352 if (local->queue_stop_reasons[q]) {
1353 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1354 flags);
1355 mod_timer(&local->dynamic_ps_timer, jiffies +
1356 msecs_to_jiffies(
1357 local->hw.conf.dynamic_ps_timeout));
1358 return;
1359 }
1360 }
1361 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1362 }
1363
1364 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1365 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1366 if (drv_tx_frames_pending(local)) {
1367 mod_timer(&local->dynamic_ps_timer, jiffies +
1368 msecs_to_jiffies(
1369 local->hw.conf.dynamic_ps_timeout));
1370 } else {
1371 ieee80211_send_nullfunc(local, sdata, 1);
1372 /* Flush to get the tx status of nullfunc frame */
1373 ieee80211_flush_queues(local, sdata);
1374 }
1375 }
1376
1377 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1378 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1379 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1380 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1381 local->hw.conf.flags |= IEEE80211_CONF_PS;
1382 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1383 }
1384 }
1385
1386 void ieee80211_dynamic_ps_timer(unsigned long data)
1387 {
1388 struct ieee80211_local *local = (void *) data;
1389
1390 if (local->quiescing || local->suspended)
1391 return;
1392
1393 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1394 }
1395
1396 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1397 {
1398 struct delayed_work *delayed_work =
1399 container_of(work, struct delayed_work, work);
1400 struct ieee80211_sub_if_data *sdata =
1401 container_of(delayed_work, struct ieee80211_sub_if_data,
1402 dfs_cac_timer_work);
1403
1404 ieee80211_vif_release_channel(sdata);
1405
1406 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1407 }
1408
1409 /* MLME */
1410 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1411 struct ieee80211_sub_if_data *sdata,
1412 const u8 *wmm_param, size_t wmm_param_len)
1413 {
1414 struct ieee80211_tx_queue_params params;
1415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1416 size_t left;
1417 int count;
1418 const u8 *pos;
1419 u8 uapsd_queues = 0;
1420
1421 if (!local->ops->conf_tx)
1422 return false;
1423
1424 if (local->hw.queues < IEEE80211_NUM_ACS)
1425 return false;
1426
1427 if (!wmm_param)
1428 return false;
1429
1430 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1431 return false;
1432
1433 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1434 uapsd_queues = ifmgd->uapsd_queues;
1435
1436 count = wmm_param[6] & 0x0f;
1437 if (count == ifmgd->wmm_last_param_set)
1438 return false;
1439 ifmgd->wmm_last_param_set = count;
1440
1441 pos = wmm_param + 8;
1442 left = wmm_param_len - 8;
1443
1444 memset(&params, 0, sizeof(params));
1445
1446 sdata->wmm_acm = 0;
1447 for (; left >= 4; left -= 4, pos += 4) {
1448 int aci = (pos[0] >> 5) & 0x03;
1449 int acm = (pos[0] >> 4) & 0x01;
1450 bool uapsd = false;
1451 int queue;
1452
1453 switch (aci) {
1454 case 1: /* AC_BK */
1455 queue = 3;
1456 if (acm)
1457 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1458 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1459 uapsd = true;
1460 break;
1461 case 2: /* AC_VI */
1462 queue = 1;
1463 if (acm)
1464 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1465 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1466 uapsd = true;
1467 break;
1468 case 3: /* AC_VO */
1469 queue = 0;
1470 if (acm)
1471 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1472 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1473 uapsd = true;
1474 break;
1475 case 0: /* AC_BE */
1476 default:
1477 queue = 2;
1478 if (acm)
1479 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1480 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1481 uapsd = true;
1482 break;
1483 }
1484
1485 params.aifs = pos[0] & 0x0f;
1486 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1487 params.cw_min = ecw2cw(pos[1] & 0x0f);
1488 params.txop = get_unaligned_le16(pos + 2);
1489 params.acm = acm;
1490 params.uapsd = uapsd;
1491
1492 mlme_dbg(sdata,
1493 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1494 queue, aci, acm,
1495 params.aifs, params.cw_min, params.cw_max,
1496 params.txop, params.uapsd);
1497 sdata->tx_conf[queue] = params;
1498 if (drv_conf_tx(local, sdata, queue, &params))
1499 sdata_err(sdata,
1500 "failed to set TX queue parameters for queue %d\n",
1501 queue);
1502 }
1503
1504 /* enable WMM or activate new settings */
1505 sdata->vif.bss_conf.qos = true;
1506 return true;
1507 }
1508
1509 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1510 {
1511 lockdep_assert_held(&sdata->local->mtx);
1512
1513 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1514 ieee80211_run_deferred_scan(sdata->local);
1515 }
1516
1517 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1518 {
1519 mutex_lock(&sdata->local->mtx);
1520 __ieee80211_stop_poll(sdata);
1521 mutex_unlock(&sdata->local->mtx);
1522 }
1523
1524 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1525 u16 capab, bool erp_valid, u8 erp)
1526 {
1527 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1528 u32 changed = 0;
1529 bool use_protection;
1530 bool use_short_preamble;
1531 bool use_short_slot;
1532
1533 if (erp_valid) {
1534 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1535 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1536 } else {
1537 use_protection = false;
1538 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1539 }
1540
1541 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1542 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1543 use_short_slot = true;
1544
1545 if (use_protection != bss_conf->use_cts_prot) {
1546 bss_conf->use_cts_prot = use_protection;
1547 changed |= BSS_CHANGED_ERP_CTS_PROT;
1548 }
1549
1550 if (use_short_preamble != bss_conf->use_short_preamble) {
1551 bss_conf->use_short_preamble = use_short_preamble;
1552 changed |= BSS_CHANGED_ERP_PREAMBLE;
1553 }
1554
1555 if (use_short_slot != bss_conf->use_short_slot) {
1556 bss_conf->use_short_slot = use_short_slot;
1557 changed |= BSS_CHANGED_ERP_SLOT;
1558 }
1559
1560 return changed;
1561 }
1562
1563 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1564 struct cfg80211_bss *cbss,
1565 u32 bss_info_changed)
1566 {
1567 struct ieee80211_bss *bss = (void *)cbss->priv;
1568 struct ieee80211_local *local = sdata->local;
1569 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1570
1571 bss_info_changed |= BSS_CHANGED_ASSOC;
1572 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1573 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1574
1575 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1576 beacon_loss_count * bss_conf->beacon_int));
1577
1578 sdata->u.mgd.associated = cbss;
1579 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1580
1581 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1582
1583 if (sdata->vif.p2p) {
1584 const struct cfg80211_bss_ies *ies;
1585
1586 rcu_read_lock();
1587 ies = rcu_dereference(cbss->ies);
1588 if (ies) {
1589 int ret;
1590
1591 ret = cfg80211_get_p2p_attr(
1592 ies->data, ies->len,
1593 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1594 (u8 *) &bss_conf->p2p_noa_attr,
1595 sizeof(bss_conf->p2p_noa_attr));
1596 if (ret >= 2) {
1597 sdata->u.mgd.p2p_noa_index =
1598 bss_conf->p2p_noa_attr.index;
1599 bss_info_changed |= BSS_CHANGED_P2P_PS;
1600 }
1601 }
1602 rcu_read_unlock();
1603 }
1604
1605 /* just to be sure */
1606 ieee80211_stop_poll(sdata);
1607
1608 ieee80211_led_assoc(local, 1);
1609
1610 if (sdata->u.mgd.have_beacon) {
1611 /*
1612 * If the AP is buggy we may get here with no DTIM period
1613 * known, so assume it's 1 which is the only safe assumption
1614 * in that case, although if the TIM IE is broken powersave
1615 * probably just won't work at all.
1616 */
1617 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1618 bss_conf->beacon_rate = bss->beacon_rate;
1619 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1620 } else {
1621 bss_conf->beacon_rate = NULL;
1622 bss_conf->dtim_period = 0;
1623 }
1624
1625 bss_conf->assoc = 1;
1626
1627 /* Tell the driver to monitor connection quality (if supported) */
1628 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1629 bss_conf->cqm_rssi_thold)
1630 bss_info_changed |= BSS_CHANGED_CQM;
1631
1632 /* Enable ARP filtering */
1633 if (bss_conf->arp_addr_cnt)
1634 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1635
1636 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1637
1638 mutex_lock(&local->iflist_mtx);
1639 ieee80211_recalc_ps(local, -1);
1640 mutex_unlock(&local->iflist_mtx);
1641
1642 ieee80211_recalc_smps(sdata);
1643 ieee80211_recalc_ps_vif(sdata);
1644
1645 netif_carrier_on(sdata->dev);
1646 }
1647
1648 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1649 u16 stype, u16 reason, bool tx,
1650 u8 *frame_buf)
1651 {
1652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1653 struct ieee80211_local *local = sdata->local;
1654 u32 changed = 0;
1655
1656 sdata_assert_lock(sdata);
1657
1658 if (WARN_ON_ONCE(tx && !frame_buf))
1659 return;
1660
1661 if (WARN_ON(!ifmgd->associated))
1662 return;
1663
1664 ieee80211_stop_poll(sdata);
1665
1666 ifmgd->associated = NULL;
1667 netif_carrier_off(sdata->dev);
1668
1669 /*
1670 * if we want to get out of ps before disassoc (why?) we have
1671 * to do it before sending disassoc, as otherwise the null-packet
1672 * won't be valid.
1673 */
1674 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1675 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1676 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1677 }
1678 local->ps_sdata = NULL;
1679
1680 /* disable per-vif ps */
1681 ieee80211_recalc_ps_vif(sdata);
1682
1683 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1684 if (tx)
1685 ieee80211_flush_queues(local, sdata);
1686
1687 /* deauthenticate/disassociate now */
1688 if (tx || frame_buf)
1689 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1690 reason, tx, frame_buf);
1691
1692 /* flush out frame */
1693 if (tx)
1694 ieee80211_flush_queues(local, sdata);
1695
1696 /* clear bssid only after building the needed mgmt frames */
1697 memset(ifmgd->bssid, 0, ETH_ALEN);
1698
1699 /* remove AP and TDLS peers */
1700 sta_info_flush_defer(sdata);
1701
1702 /* finally reset all BSS / config parameters */
1703 changed |= ieee80211_reset_erp_info(sdata);
1704
1705 ieee80211_led_assoc(local, 0);
1706 changed |= BSS_CHANGED_ASSOC;
1707 sdata->vif.bss_conf.assoc = false;
1708
1709 ifmgd->p2p_noa_index = -1;
1710 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1711 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1712
1713 /* on the next assoc, re-program HT/VHT parameters */
1714 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1715 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1716 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1717 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1718
1719 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1720
1721 del_timer_sync(&local->dynamic_ps_timer);
1722 cancel_work_sync(&local->dynamic_ps_enable_work);
1723
1724 /* Disable ARP filtering */
1725 if (sdata->vif.bss_conf.arp_addr_cnt)
1726 changed |= BSS_CHANGED_ARP_FILTER;
1727
1728 sdata->vif.bss_conf.qos = false;
1729 changed |= BSS_CHANGED_QOS;
1730
1731 /* The BSSID (not really interesting) and HT changed */
1732 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1733 ieee80211_bss_info_change_notify(sdata, changed);
1734
1735 /* disassociated - set to defaults now */
1736 ieee80211_set_wmm_default(sdata, false);
1737
1738 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1739 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1740 del_timer_sync(&sdata->u.mgd.timer);
1741 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1742
1743 sdata->vif.bss_conf.dtim_period = 0;
1744 sdata->vif.bss_conf.beacon_rate = NULL;
1745
1746 ifmgd->have_beacon = false;
1747
1748 ifmgd->flags = 0;
1749 ieee80211_vif_release_channel(sdata);
1750 }
1751
1752 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1753 struct ieee80211_hdr *hdr)
1754 {
1755 /*
1756 * We can postpone the mgd.timer whenever receiving unicast frames
1757 * from AP because we know that the connection is working both ways
1758 * at that time. But multicast frames (and hence also beacons) must
1759 * be ignored here, because we need to trigger the timer during
1760 * data idle periods for sending the periodic probe request to the
1761 * AP we're connected to.
1762 */
1763 if (is_multicast_ether_addr(hdr->addr1))
1764 return;
1765
1766 ieee80211_sta_reset_conn_monitor(sdata);
1767 }
1768
1769 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1770 {
1771 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1772 struct ieee80211_local *local = sdata->local;
1773
1774 mutex_lock(&local->mtx);
1775 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1776 goto out;
1777
1778 __ieee80211_stop_poll(sdata);
1779
1780 mutex_lock(&local->iflist_mtx);
1781 ieee80211_recalc_ps(local, -1);
1782 mutex_unlock(&local->iflist_mtx);
1783
1784 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1785 goto out;
1786
1787 /*
1788 * We've received a probe response, but are not sure whether
1789 * we have or will be receiving any beacons or data, so let's
1790 * schedule the timers again, just in case.
1791 */
1792 ieee80211_sta_reset_beacon_monitor(sdata);
1793
1794 mod_timer(&ifmgd->conn_mon_timer,
1795 round_jiffies_up(jiffies +
1796 IEEE80211_CONNECTION_IDLE_TIME));
1797 out:
1798 mutex_unlock(&local->mtx);
1799 }
1800
1801 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1802 struct ieee80211_hdr *hdr, bool ack)
1803 {
1804 if (!ieee80211_is_data(hdr->frame_control))
1805 return;
1806
1807 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1808 sdata->u.mgd.probe_send_count > 0) {
1809 if (ack)
1810 ieee80211_sta_reset_conn_monitor(sdata);
1811 else
1812 sdata->u.mgd.nullfunc_failed = true;
1813 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1814 return;
1815 }
1816
1817 if (ack)
1818 ieee80211_sta_reset_conn_monitor(sdata);
1819 }
1820
1821 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1822 {
1823 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1824 const u8 *ssid;
1825 u8 *dst = ifmgd->associated->bssid;
1826 u8 unicast_limit = max(1, max_probe_tries - 3);
1827
1828 /*
1829 * Try sending broadcast probe requests for the last three
1830 * probe requests after the first ones failed since some
1831 * buggy APs only support broadcast probe requests.
1832 */
1833 if (ifmgd->probe_send_count >= unicast_limit)
1834 dst = NULL;
1835
1836 /*
1837 * When the hardware reports an accurate Tx ACK status, it's
1838 * better to send a nullfunc frame instead of a probe request,
1839 * as it will kick us off the AP quickly if we aren't associated
1840 * anymore. The timeout will be reset if the frame is ACKed by
1841 * the AP.
1842 */
1843 ifmgd->probe_send_count++;
1844
1845 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1846 ifmgd->nullfunc_failed = false;
1847 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1848 } else {
1849 int ssid_len;
1850
1851 rcu_read_lock();
1852 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1853 if (WARN_ON_ONCE(ssid == NULL))
1854 ssid_len = 0;
1855 else
1856 ssid_len = ssid[1];
1857
1858 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1859 0, (u32) -1, true, 0,
1860 ifmgd->associated->channel, false);
1861 rcu_read_unlock();
1862 }
1863
1864 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1865 run_again(sdata, ifmgd->probe_timeout);
1866 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1867 ieee80211_flush_queues(sdata->local, sdata);
1868 }
1869
1870 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1871 bool beacon)
1872 {
1873 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1874 bool already = false;
1875
1876 if (!ieee80211_sdata_running(sdata))
1877 return;
1878
1879 sdata_lock(sdata);
1880
1881 if (!ifmgd->associated)
1882 goto out;
1883
1884 mutex_lock(&sdata->local->mtx);
1885
1886 if (sdata->local->tmp_channel || sdata->local->scanning) {
1887 mutex_unlock(&sdata->local->mtx);
1888 goto out;
1889 }
1890
1891 if (beacon) {
1892 mlme_dbg_ratelimited(sdata,
1893 "detected beacon loss from AP (missed %d beacons) - probing\n",
1894 beacon_loss_count);
1895
1896 ieee80211_cqm_rssi_notify(&sdata->vif,
1897 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1898 GFP_KERNEL);
1899 }
1900
1901 /*
1902 * The driver/our work has already reported this event or the
1903 * connection monitoring has kicked in and we have already sent
1904 * a probe request. Or maybe the AP died and the driver keeps
1905 * reporting until we disassociate...
1906 *
1907 * In either case we have to ignore the current call to this
1908 * function (except for setting the correct probe reason bit)
1909 * because otherwise we would reset the timer every time and
1910 * never check whether we received a probe response!
1911 */
1912 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1913 already = true;
1914
1915 mutex_unlock(&sdata->local->mtx);
1916
1917 if (already)
1918 goto out;
1919
1920 mutex_lock(&sdata->local->iflist_mtx);
1921 ieee80211_recalc_ps(sdata->local, -1);
1922 mutex_unlock(&sdata->local->iflist_mtx);
1923
1924 ifmgd->probe_send_count = 0;
1925 ieee80211_mgd_probe_ap_send(sdata);
1926 out:
1927 sdata_unlock(sdata);
1928 }
1929
1930 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1931 struct ieee80211_vif *vif)
1932 {
1933 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1935 struct cfg80211_bss *cbss;
1936 struct sk_buff *skb;
1937 const u8 *ssid;
1938 int ssid_len;
1939
1940 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1941 return NULL;
1942
1943 sdata_assert_lock(sdata);
1944
1945 if (ifmgd->associated)
1946 cbss = ifmgd->associated;
1947 else if (ifmgd->auth_data)
1948 cbss = ifmgd->auth_data->bss;
1949 else if (ifmgd->assoc_data)
1950 cbss = ifmgd->assoc_data->bss;
1951 else
1952 return NULL;
1953
1954 rcu_read_lock();
1955 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
1956 if (WARN_ON_ONCE(ssid == NULL))
1957 ssid_len = 0;
1958 else
1959 ssid_len = ssid[1];
1960
1961 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
1962 (u32) -1, cbss->channel,
1963 ssid + 2, ssid_len,
1964 NULL, 0, true);
1965 rcu_read_unlock();
1966
1967 return skb;
1968 }
1969 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1970
1971 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1972 {
1973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1974 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1975
1976 sdata_lock(sdata);
1977 if (!ifmgd->associated) {
1978 sdata_unlock(sdata);
1979 return;
1980 }
1981
1982 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1983 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1984 true, frame_buf);
1985 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1986 sdata->vif.csa_active = false;
1987 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1988 IEEE80211_MAX_QUEUE_MAP,
1989 IEEE80211_QUEUE_STOP_REASON_CSA);
1990
1991 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
1992 IEEE80211_DEAUTH_FRAME_LEN);
1993 sdata_unlock(sdata);
1994 }
1995
1996 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1997 {
1998 struct ieee80211_sub_if_data *sdata =
1999 container_of(work, struct ieee80211_sub_if_data,
2000 u.mgd.beacon_connection_loss_work);
2001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2002 struct sta_info *sta;
2003
2004 if (ifmgd->associated) {
2005 rcu_read_lock();
2006 sta = sta_info_get(sdata, ifmgd->bssid);
2007 if (sta)
2008 sta->beacon_loss_count++;
2009 rcu_read_unlock();
2010 }
2011
2012 if (ifmgd->connection_loss) {
2013 sdata_info(sdata, "Connection to AP %pM lost\n",
2014 ifmgd->bssid);
2015 __ieee80211_disconnect(sdata);
2016 } else {
2017 ieee80211_mgd_probe_ap(sdata, true);
2018 }
2019 }
2020
2021 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2022 {
2023 struct ieee80211_sub_if_data *sdata =
2024 container_of(work, struct ieee80211_sub_if_data,
2025 u.mgd.csa_connection_drop_work);
2026
2027 __ieee80211_disconnect(sdata);
2028 }
2029
2030 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2031 {
2032 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2033 struct ieee80211_hw *hw = &sdata->local->hw;
2034
2035 trace_api_beacon_loss(sdata);
2036
2037 sdata->u.mgd.connection_loss = false;
2038 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2039 }
2040 EXPORT_SYMBOL(ieee80211_beacon_loss);
2041
2042 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2043 {
2044 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2045 struct ieee80211_hw *hw = &sdata->local->hw;
2046
2047 trace_api_connection_loss(sdata);
2048
2049 sdata->u.mgd.connection_loss = true;
2050 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2051 }
2052 EXPORT_SYMBOL(ieee80211_connection_loss);
2053
2054
2055 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2056 bool assoc)
2057 {
2058 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2059
2060 sdata_assert_lock(sdata);
2061
2062 if (!assoc) {
2063 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2064
2065 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2066 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2067 sdata->u.mgd.flags = 0;
2068 ieee80211_vif_release_channel(sdata);
2069 }
2070
2071 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2072 kfree(auth_data);
2073 sdata->u.mgd.auth_data = NULL;
2074 }
2075
2076 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2077 struct ieee80211_mgmt *mgmt, size_t len)
2078 {
2079 struct ieee80211_local *local = sdata->local;
2080 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2081 u8 *pos;
2082 struct ieee802_11_elems elems;
2083 u32 tx_flags = 0;
2084
2085 pos = mgmt->u.auth.variable;
2086 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2087 if (!elems.challenge)
2088 return;
2089 auth_data->expected_transaction = 4;
2090 drv_mgd_prepare_tx(sdata->local, sdata);
2091 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2092 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2093 IEEE80211_TX_INTFL_MLME_CONN_TX;
2094 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2095 elems.challenge - 2, elems.challenge_len + 2,
2096 auth_data->bss->bssid, auth_data->bss->bssid,
2097 auth_data->key, auth_data->key_len,
2098 auth_data->key_idx, tx_flags);
2099 }
2100
2101 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2102 struct ieee80211_mgmt *mgmt, size_t len)
2103 {
2104 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2105 u8 bssid[ETH_ALEN];
2106 u16 auth_alg, auth_transaction, status_code;
2107 struct sta_info *sta;
2108
2109 sdata_assert_lock(sdata);
2110
2111 if (len < 24 + 6)
2112 return;
2113
2114 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2115 return;
2116
2117 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2118
2119 if (!ether_addr_equal(bssid, mgmt->bssid))
2120 return;
2121
2122 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2123 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2124 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2125
2126 if (auth_alg != ifmgd->auth_data->algorithm ||
2127 auth_transaction != ifmgd->auth_data->expected_transaction) {
2128 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2129 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2130 auth_transaction,
2131 ifmgd->auth_data->expected_transaction);
2132 return;
2133 }
2134
2135 if (status_code != WLAN_STATUS_SUCCESS) {
2136 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2137 mgmt->sa, status_code);
2138 ieee80211_destroy_auth_data(sdata, false);
2139 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2140 return;
2141 }
2142
2143 switch (ifmgd->auth_data->algorithm) {
2144 case WLAN_AUTH_OPEN:
2145 case WLAN_AUTH_LEAP:
2146 case WLAN_AUTH_FT:
2147 case WLAN_AUTH_SAE:
2148 break;
2149 case WLAN_AUTH_SHARED_KEY:
2150 if (ifmgd->auth_data->expected_transaction != 4) {
2151 ieee80211_auth_challenge(sdata, mgmt, len);
2152 /* need another frame */
2153 return;
2154 }
2155 break;
2156 default:
2157 WARN_ONCE(1, "invalid auth alg %d",
2158 ifmgd->auth_data->algorithm);
2159 return;
2160 }
2161
2162 sdata_info(sdata, "authenticated\n");
2163 ifmgd->auth_data->done = true;
2164 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2165 ifmgd->auth_data->timeout_started = true;
2166 run_again(sdata, ifmgd->auth_data->timeout);
2167
2168 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2169 ifmgd->auth_data->expected_transaction != 2) {
2170 /*
2171 * Report auth frame to user space for processing since another
2172 * round of Authentication frames is still needed.
2173 */
2174 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2175 return;
2176 }
2177
2178 /* move station state to auth */
2179 mutex_lock(&sdata->local->sta_mtx);
2180 sta = sta_info_get(sdata, bssid);
2181 if (!sta) {
2182 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2183 goto out_err;
2184 }
2185 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2186 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2187 goto out_err;
2188 }
2189 mutex_unlock(&sdata->local->sta_mtx);
2190
2191 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2192 return;
2193 out_err:
2194 mutex_unlock(&sdata->local->sta_mtx);
2195 /* ignore frame -- wait for timeout */
2196 }
2197
2198
2199 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2200 struct ieee80211_mgmt *mgmt, size_t len)
2201 {
2202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2203 const u8 *bssid = NULL;
2204 u16 reason_code;
2205
2206 sdata_assert_lock(sdata);
2207
2208 if (len < 24 + 2)
2209 return;
2210
2211 if (!ifmgd->associated ||
2212 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2213 return;
2214
2215 bssid = ifmgd->associated->bssid;
2216
2217 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2218
2219 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2220 bssid, reason_code);
2221
2222 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2223
2224 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2225 }
2226
2227
2228 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2229 struct ieee80211_mgmt *mgmt, size_t len)
2230 {
2231 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2232 u16 reason_code;
2233
2234 sdata_assert_lock(sdata);
2235
2236 if (len < 24 + 2)
2237 return;
2238
2239 if (!ifmgd->associated ||
2240 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2241 return;
2242
2243 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2244
2245 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2246 mgmt->sa, reason_code);
2247
2248 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2249
2250 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2251 }
2252
2253 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2254 u8 *supp_rates, unsigned int supp_rates_len,
2255 u32 *rates, u32 *basic_rates,
2256 bool *have_higher_than_11mbit,
2257 int *min_rate, int *min_rate_index,
2258 int shift, u32 rate_flags)
2259 {
2260 int i, j;
2261
2262 for (i = 0; i < supp_rates_len; i++) {
2263 int rate = supp_rates[i] & 0x7f;
2264 bool is_basic = !!(supp_rates[i] & 0x80);
2265
2266 if ((rate * 5 * (1 << shift)) > 110)
2267 *have_higher_than_11mbit = true;
2268
2269 /*
2270 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2271 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2272 *
2273 * Note: Even through the membership selector and the basic
2274 * rate flag share the same bit, they are not exactly
2275 * the same.
2276 */
2277 if (!!(supp_rates[i] & 0x80) &&
2278 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2279 continue;
2280
2281 for (j = 0; j < sband->n_bitrates; j++) {
2282 struct ieee80211_rate *br;
2283 int brate;
2284
2285 br = &sband->bitrates[j];
2286 if ((rate_flags & br->flags) != rate_flags)
2287 continue;
2288
2289 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2290 if (brate == rate) {
2291 *rates |= BIT(j);
2292 if (is_basic)
2293 *basic_rates |= BIT(j);
2294 if ((rate * 5) < *min_rate) {
2295 *min_rate = rate * 5;
2296 *min_rate_index = j;
2297 }
2298 break;
2299 }
2300 }
2301 }
2302 }
2303
2304 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2305 bool assoc)
2306 {
2307 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2308
2309 sdata_assert_lock(sdata);
2310
2311 if (!assoc) {
2312 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2313
2314 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2315 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2316 sdata->u.mgd.flags = 0;
2317 ieee80211_vif_release_channel(sdata);
2318 }
2319
2320 kfree(assoc_data);
2321 sdata->u.mgd.assoc_data = NULL;
2322 }
2323
2324 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2325 struct cfg80211_bss *cbss,
2326 struct ieee80211_mgmt *mgmt, size_t len)
2327 {
2328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2329 struct ieee80211_local *local = sdata->local;
2330 struct ieee80211_supported_band *sband;
2331 struct sta_info *sta;
2332 u8 *pos;
2333 u16 capab_info, aid;
2334 struct ieee802_11_elems elems;
2335 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2336 const struct cfg80211_bss_ies *bss_ies = NULL;
2337 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2338 u32 changed = 0;
2339 int err;
2340 bool ret;
2341
2342 /* AssocResp and ReassocResp have identical structure */
2343
2344 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2345 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2346
2347 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2348 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2349 aid);
2350 aid &= ~(BIT(15) | BIT(14));
2351
2352 ifmgd->broken_ap = false;
2353
2354 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2355 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2356 aid);
2357 aid = 0;
2358 ifmgd->broken_ap = true;
2359 }
2360
2361 pos = mgmt->u.assoc_resp.variable;
2362 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2363
2364 if (!elems.supp_rates) {
2365 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2366 return false;
2367 }
2368
2369 ifmgd->aid = aid;
2370
2371 /*
2372 * Some APs are erroneously not including some information in their
2373 * (re)association response frames. Try to recover by using the data
2374 * from the beacon or probe response. This seems to afflict mobile
2375 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2376 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2377 */
2378 if ((assoc_data->wmm && !elems.wmm_param) ||
2379 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2380 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2381 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2382 (!elems.vht_cap_elem || !elems.vht_operation))) {
2383 const struct cfg80211_bss_ies *ies;
2384 struct ieee802_11_elems bss_elems;
2385
2386 rcu_read_lock();
2387 ies = rcu_dereference(cbss->ies);
2388 if (ies)
2389 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2390 GFP_ATOMIC);
2391 rcu_read_unlock();
2392 if (!bss_ies)
2393 return false;
2394
2395 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2396 false, &bss_elems);
2397 if (assoc_data->wmm &&
2398 !elems.wmm_param && bss_elems.wmm_param) {
2399 elems.wmm_param = bss_elems.wmm_param;
2400 sdata_info(sdata,
2401 "AP bug: WMM param missing from AssocResp\n");
2402 }
2403
2404 /*
2405 * Also check if we requested HT/VHT, otherwise the AP doesn't
2406 * have to include the IEs in the (re)association response.
2407 */
2408 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2409 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2410 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2411 sdata_info(sdata,
2412 "AP bug: HT capability missing from AssocResp\n");
2413 }
2414 if (!elems.ht_operation && bss_elems.ht_operation &&
2415 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2416 elems.ht_operation = bss_elems.ht_operation;
2417 sdata_info(sdata,
2418 "AP bug: HT operation missing from AssocResp\n");
2419 }
2420 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2421 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2422 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2423 sdata_info(sdata,
2424 "AP bug: VHT capa missing from AssocResp\n");
2425 }
2426 if (!elems.vht_operation && bss_elems.vht_operation &&
2427 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2428 elems.vht_operation = bss_elems.vht_operation;
2429 sdata_info(sdata,
2430 "AP bug: VHT operation missing from AssocResp\n");
2431 }
2432 }
2433
2434 /*
2435 * We previously checked these in the beacon/probe response, so
2436 * they should be present here. This is just a safety net.
2437 */
2438 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2439 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2440 sdata_info(sdata,
2441 "HT AP is missing WMM params or HT capability/operation\n");
2442 ret = false;
2443 goto out;
2444 }
2445
2446 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2447 (!elems.vht_cap_elem || !elems.vht_operation)) {
2448 sdata_info(sdata,
2449 "VHT AP is missing VHT capability/operation\n");
2450 ret = false;
2451 goto out;
2452 }
2453
2454 mutex_lock(&sdata->local->sta_mtx);
2455 /*
2456 * station info was already allocated and inserted before
2457 * the association and should be available to us
2458 */
2459 sta = sta_info_get(sdata, cbss->bssid);
2460 if (WARN_ON(!sta)) {
2461 mutex_unlock(&sdata->local->sta_mtx);
2462 ret = false;
2463 goto out;
2464 }
2465
2466 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2467
2468 /* Set up internal HT/VHT capabilities */
2469 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2470 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2471 elems.ht_cap_elem, sta);
2472
2473 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2474 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2475 elems.vht_cap_elem, sta);
2476
2477 /*
2478 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2479 * in their association response, so ignore that data for our own
2480 * configuration. If it changed since the last beacon, we'll get the
2481 * next beacon and update then.
2482 */
2483
2484 /*
2485 * If an operating mode notification IE is present, override the
2486 * NSS calculation (that would be done in rate_control_rate_init())
2487 * and use the # of streams from that element.
2488 */
2489 if (elems.opmode_notif &&
2490 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2491 u8 nss;
2492
2493 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2494 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2495 nss += 1;
2496 sta->sta.rx_nss = nss;
2497 }
2498
2499 rate_control_rate_init(sta);
2500
2501 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2502 set_sta_flag(sta, WLAN_STA_MFP);
2503
2504 if (elems.wmm_param)
2505 set_sta_flag(sta, WLAN_STA_WME);
2506
2507 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2508 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2509 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2510 if (err) {
2511 sdata_info(sdata,
2512 "failed to move station %pM to desired state\n",
2513 sta->sta.addr);
2514 WARN_ON(__sta_info_destroy(sta));
2515 mutex_unlock(&sdata->local->sta_mtx);
2516 ret = false;
2517 goto out;
2518 }
2519
2520 mutex_unlock(&sdata->local->sta_mtx);
2521
2522 /*
2523 * Always handle WMM once after association regardless
2524 * of the first value the AP uses. Setting -1 here has
2525 * that effect because the AP values is an unsigned
2526 * 4-bit value.
2527 */
2528 ifmgd->wmm_last_param_set = -1;
2529
2530 if (elems.wmm_param)
2531 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2532 elems.wmm_param_len);
2533 else
2534 ieee80211_set_wmm_default(sdata, false);
2535 changed |= BSS_CHANGED_QOS;
2536
2537 /* set AID and assoc capability,
2538 * ieee80211_set_associated() will tell the driver */
2539 bss_conf->aid = aid;
2540 bss_conf->assoc_capability = capab_info;
2541 ieee80211_set_associated(sdata, cbss, changed);
2542
2543 /*
2544 * If we're using 4-addr mode, let the AP know that we're
2545 * doing so, so that it can create the STA VLAN on its side
2546 */
2547 if (ifmgd->use_4addr)
2548 ieee80211_send_4addr_nullfunc(local, sdata);
2549
2550 /*
2551 * Start timer to probe the connection to the AP now.
2552 * Also start the timer that will detect beacon loss.
2553 */
2554 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2555 ieee80211_sta_reset_beacon_monitor(sdata);
2556
2557 ret = true;
2558 out:
2559 kfree(bss_ies);
2560 return ret;
2561 }
2562
2563 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2564 struct ieee80211_mgmt *mgmt,
2565 size_t len)
2566 {
2567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2568 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2569 u16 capab_info, status_code, aid;
2570 struct ieee802_11_elems elems;
2571 u8 *pos;
2572 bool reassoc;
2573 struct cfg80211_bss *bss;
2574
2575 sdata_assert_lock(sdata);
2576
2577 if (!assoc_data)
2578 return;
2579 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2580 return;
2581
2582 /*
2583 * AssocResp and ReassocResp have identical structure, so process both
2584 * of them in this function.
2585 */
2586
2587 if (len < 24 + 6)
2588 return;
2589
2590 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2591 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2592 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2593 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2594
2595 sdata_info(sdata,
2596 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2597 reassoc ? "Rea" : "A", mgmt->sa,
2598 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2599
2600 pos = mgmt->u.assoc_resp.variable;
2601 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2602
2603 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2604 elems.timeout_int &&
2605 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2606 u32 tu, ms;
2607 tu = le32_to_cpu(elems.timeout_int->value);
2608 ms = tu * 1024 / 1000;
2609 sdata_info(sdata,
2610 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2611 mgmt->sa, tu, ms);
2612 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2613 assoc_data->timeout_started = true;
2614 if (ms > IEEE80211_ASSOC_TIMEOUT)
2615 run_again(sdata, assoc_data->timeout);
2616 return;
2617 }
2618
2619 bss = assoc_data->bss;
2620
2621 if (status_code != WLAN_STATUS_SUCCESS) {
2622 sdata_info(sdata, "%pM denied association (code=%d)\n",
2623 mgmt->sa, status_code);
2624 ieee80211_destroy_assoc_data(sdata, false);
2625 } else {
2626 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2627 /* oops -- internal error -- send timeout for now */
2628 ieee80211_destroy_assoc_data(sdata, false);
2629 cfg80211_assoc_timeout(sdata->dev, bss);
2630 return;
2631 }
2632 sdata_info(sdata, "associated\n");
2633
2634 /*
2635 * destroy assoc_data afterwards, as otherwise an idle
2636 * recalc after assoc_data is NULL but before associated
2637 * is set can cause the interface to go idle
2638 */
2639 ieee80211_destroy_assoc_data(sdata, true);
2640 }
2641
2642 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2643 }
2644
2645 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2646 struct ieee80211_mgmt *mgmt, size_t len,
2647 struct ieee80211_rx_status *rx_status,
2648 struct ieee802_11_elems *elems)
2649 {
2650 struct ieee80211_local *local = sdata->local;
2651 int freq;
2652 struct ieee80211_bss *bss;
2653 struct ieee80211_channel *channel;
2654
2655 sdata_assert_lock(sdata);
2656
2657 if (elems->ds_params)
2658 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2659 rx_status->band);
2660 else
2661 freq = rx_status->freq;
2662
2663 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2664
2665 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2666 return;
2667
2668 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2669 channel);
2670 if (bss) {
2671 ieee80211_rx_bss_put(local, bss);
2672 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2673 }
2674 }
2675
2676
2677 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2678 struct sk_buff *skb)
2679 {
2680 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2681 struct ieee80211_if_managed *ifmgd;
2682 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2683 size_t baselen, len = skb->len;
2684 struct ieee802_11_elems elems;
2685
2686 ifmgd = &sdata->u.mgd;
2687
2688 sdata_assert_lock(sdata);
2689
2690 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2691 return; /* ignore ProbeResp to foreign address */
2692
2693 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2694 if (baselen > len)
2695 return;
2696
2697 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2698 false, &elems);
2699
2700 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2701
2702 if (ifmgd->associated &&
2703 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2704 ieee80211_reset_ap_probe(sdata);
2705
2706 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2707 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2708 /* got probe response, continue with auth */
2709 sdata_info(sdata, "direct probe responded\n");
2710 ifmgd->auth_data->tries = 0;
2711 ifmgd->auth_data->timeout = jiffies;
2712 ifmgd->auth_data->timeout_started = true;
2713 run_again(sdata, ifmgd->auth_data->timeout);
2714 }
2715 }
2716
2717 /*
2718 * This is the canonical list of information elements we care about,
2719 * the filter code also gives us all changes to the Microsoft OUI
2720 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2721 *
2722 * We implement beacon filtering in software since that means we can
2723 * avoid processing the frame here and in cfg80211, and userspace
2724 * will not be able to tell whether the hardware supports it or not.
2725 *
2726 * XXX: This list needs to be dynamic -- userspace needs to be able to
2727 * add items it requires. It also needs to be able to tell us to
2728 * look out for other vendor IEs.
2729 */
2730 static const u64 care_about_ies =
2731 (1ULL << WLAN_EID_COUNTRY) |
2732 (1ULL << WLAN_EID_ERP_INFO) |
2733 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2734 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2735 (1ULL << WLAN_EID_HT_CAPABILITY) |
2736 (1ULL << WLAN_EID_HT_OPERATION);
2737
2738 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2739 struct ieee80211_mgmt *mgmt, size_t len,
2740 struct ieee80211_rx_status *rx_status)
2741 {
2742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2743 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2744 size_t baselen;
2745 struct ieee802_11_elems elems;
2746 struct ieee80211_local *local = sdata->local;
2747 struct ieee80211_chanctx_conf *chanctx_conf;
2748 struct ieee80211_channel *chan;
2749 struct sta_info *sta;
2750 u32 changed = 0;
2751 bool erp_valid;
2752 u8 erp_value = 0;
2753 u32 ncrc;
2754 u8 *bssid;
2755 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2756
2757 sdata_assert_lock(sdata);
2758
2759 /* Process beacon from the current BSS */
2760 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2761 if (baselen > len)
2762 return;
2763
2764 rcu_read_lock();
2765 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2766 if (!chanctx_conf) {
2767 rcu_read_unlock();
2768 return;
2769 }
2770
2771 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2772 rcu_read_unlock();
2773 return;
2774 }
2775 chan = chanctx_conf->def.chan;
2776 rcu_read_unlock();
2777
2778 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2779 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2780 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2781 len - baselen, false, &elems);
2782
2783 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2784 if (elems.tim && !elems.parse_error) {
2785 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2786 ifmgd->dtim_period = tim_ie->dtim_period;
2787 }
2788 ifmgd->have_beacon = true;
2789 ifmgd->assoc_data->need_beacon = false;
2790 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2791 sdata->vif.bss_conf.sync_tsf =
2792 le64_to_cpu(mgmt->u.beacon.timestamp);
2793 sdata->vif.bss_conf.sync_device_ts =
2794 rx_status->device_timestamp;
2795 if (elems.tim)
2796 sdata->vif.bss_conf.sync_dtim_count =
2797 elems.tim->dtim_count;
2798 else
2799 sdata->vif.bss_conf.sync_dtim_count = 0;
2800 }
2801 /* continue assoc process */
2802 ifmgd->assoc_data->timeout = jiffies;
2803 ifmgd->assoc_data->timeout_started = true;
2804 run_again(sdata, ifmgd->assoc_data->timeout);
2805 return;
2806 }
2807
2808 if (!ifmgd->associated ||
2809 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2810 return;
2811 bssid = ifmgd->associated->bssid;
2812
2813 /* Track average RSSI from the Beacon frames of the current AP */
2814 ifmgd->last_beacon_signal = rx_status->signal;
2815 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2816 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2817 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2818 ifmgd->last_cqm_event_signal = 0;
2819 ifmgd->count_beacon_signal = 1;
2820 ifmgd->last_ave_beacon_signal = 0;
2821 } else {
2822 ifmgd->ave_beacon_signal =
2823 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2824 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2825 ifmgd->ave_beacon_signal) / 16;
2826 ifmgd->count_beacon_signal++;
2827 }
2828
2829 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2830 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2831 int sig = ifmgd->ave_beacon_signal;
2832 int last_sig = ifmgd->last_ave_beacon_signal;
2833
2834 /*
2835 * if signal crosses either of the boundaries, invoke callback
2836 * with appropriate parameters
2837 */
2838 if (sig > ifmgd->rssi_max_thold &&
2839 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2840 ifmgd->last_ave_beacon_signal = sig;
2841 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2842 } else if (sig < ifmgd->rssi_min_thold &&
2843 (last_sig >= ifmgd->rssi_max_thold ||
2844 last_sig == 0)) {
2845 ifmgd->last_ave_beacon_signal = sig;
2846 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2847 }
2848 }
2849
2850 if (bss_conf->cqm_rssi_thold &&
2851 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2852 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2853 int sig = ifmgd->ave_beacon_signal / 16;
2854 int last_event = ifmgd->last_cqm_event_signal;
2855 int thold = bss_conf->cqm_rssi_thold;
2856 int hyst = bss_conf->cqm_rssi_hyst;
2857 if (sig < thold &&
2858 (last_event == 0 || sig < last_event - hyst)) {
2859 ifmgd->last_cqm_event_signal = sig;
2860 ieee80211_cqm_rssi_notify(
2861 &sdata->vif,
2862 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2863 GFP_KERNEL);
2864 } else if (sig > thold &&
2865 (last_event == 0 || sig > last_event + hyst)) {
2866 ifmgd->last_cqm_event_signal = sig;
2867 ieee80211_cqm_rssi_notify(
2868 &sdata->vif,
2869 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2870 GFP_KERNEL);
2871 }
2872 }
2873
2874 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
2875 mlme_dbg_ratelimited(sdata,
2876 "cancelling AP probe due to a received beacon\n");
2877 ieee80211_reset_ap_probe(sdata);
2878 }
2879
2880 /*
2881 * Push the beacon loss detection into the future since
2882 * we are processing a beacon from the AP just now.
2883 */
2884 ieee80211_sta_reset_beacon_monitor(sdata);
2885
2886 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2887 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2888 len - baselen, false, &elems,
2889 care_about_ies, ncrc);
2890
2891 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2892 bool directed_tim = ieee80211_check_tim(elems.tim,
2893 elems.tim_len,
2894 ifmgd->aid);
2895 if (directed_tim) {
2896 if (local->hw.conf.dynamic_ps_timeout > 0) {
2897 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2898 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2899 ieee80211_hw_config(local,
2900 IEEE80211_CONF_CHANGE_PS);
2901 }
2902 ieee80211_send_nullfunc(local, sdata, 0);
2903 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2904 local->pspolling = true;
2905
2906 /*
2907 * Here is assumed that the driver will be
2908 * able to send ps-poll frame and receive a
2909 * response even though power save mode is
2910 * enabled, but some drivers might require
2911 * to disable power save here. This needs
2912 * to be investigated.
2913 */
2914 ieee80211_send_pspoll(local, sdata);
2915 }
2916 }
2917 }
2918
2919 if (sdata->vif.p2p) {
2920 struct ieee80211_p2p_noa_attr noa = {};
2921 int ret;
2922
2923 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2924 len - baselen,
2925 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2926 (u8 *) &noa, sizeof(noa));
2927 if (ret >= 2) {
2928 if (sdata->u.mgd.p2p_noa_index != noa.index) {
2929 /* valid noa_attr and index changed */
2930 sdata->u.mgd.p2p_noa_index = noa.index;
2931 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
2932 changed |= BSS_CHANGED_P2P_PS;
2933 /*
2934 * make sure we update all information, the CRC
2935 * mechanism doesn't look at P2P attributes.
2936 */
2937 ifmgd->beacon_crc_valid = false;
2938 }
2939 } else if (sdata->u.mgd.p2p_noa_index != -1) {
2940 /* noa_attr not found and we had valid noa_attr before */
2941 sdata->u.mgd.p2p_noa_index = -1;
2942 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
2943 changed |= BSS_CHANGED_P2P_PS;
2944 ifmgd->beacon_crc_valid = false;
2945 }
2946 }
2947
2948 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2949 return;
2950 ifmgd->beacon_crc = ncrc;
2951 ifmgd->beacon_crc_valid = true;
2952
2953 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2954
2955 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2956 &elems, true);
2957
2958 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2959 elems.wmm_param_len))
2960 changed |= BSS_CHANGED_QOS;
2961
2962 /*
2963 * If we haven't had a beacon before, tell the driver about the
2964 * DTIM period (and beacon timing if desired) now.
2965 */
2966 if (!ifmgd->have_beacon) {
2967 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2968 if (elems.tim)
2969 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2970 else
2971 bss_conf->dtim_period = 1;
2972
2973 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2974 sdata->vif.bss_conf.sync_tsf =
2975 le64_to_cpu(mgmt->u.beacon.timestamp);
2976 sdata->vif.bss_conf.sync_device_ts =
2977 rx_status->device_timestamp;
2978 if (elems.tim)
2979 sdata->vif.bss_conf.sync_dtim_count =
2980 elems.tim->dtim_count;
2981 else
2982 sdata->vif.bss_conf.sync_dtim_count = 0;
2983 }
2984
2985 changed |= BSS_CHANGED_BEACON_INFO;
2986 ifmgd->have_beacon = true;
2987
2988 mutex_lock(&local->iflist_mtx);
2989 ieee80211_recalc_ps(local, -1);
2990 mutex_unlock(&local->iflist_mtx);
2991
2992 ieee80211_recalc_ps_vif(sdata);
2993 }
2994
2995 if (elems.erp_info) {
2996 erp_valid = true;
2997 erp_value = elems.erp_info[0];
2998 } else {
2999 erp_valid = false;
3000 }
3001 changed |= ieee80211_handle_bss_capability(sdata,
3002 le16_to_cpu(mgmt->u.beacon.capab_info),
3003 erp_valid, erp_value);
3004
3005 mutex_lock(&local->sta_mtx);
3006 sta = sta_info_get(sdata, bssid);
3007
3008 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3009 elems.vht_operation, bssid, &changed)) {
3010 mutex_unlock(&local->sta_mtx);
3011 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3012 WLAN_REASON_DEAUTH_LEAVING,
3013 true, deauth_buf);
3014 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3015 sizeof(deauth_buf));
3016 return;
3017 }
3018
3019 if (sta && elems.opmode_notif)
3020 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3021 rx_status->band, true);
3022 mutex_unlock(&local->sta_mtx);
3023
3024 if (elems.country_elem && elems.pwr_constr_elem &&
3025 mgmt->u.probe_resp.capab_info &
3026 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3027 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3028 elems.country_elem,
3029 elems.country_elem_len,
3030 elems.pwr_constr_elem);
3031
3032 ieee80211_bss_info_change_notify(sdata, changed);
3033 }
3034
3035 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3036 struct sk_buff *skb)
3037 {
3038 struct ieee80211_rx_status *rx_status;
3039 struct ieee80211_mgmt *mgmt;
3040 u16 fc;
3041 struct ieee802_11_elems elems;
3042 int ies_len;
3043
3044 rx_status = (struct ieee80211_rx_status *) skb->cb;
3045 mgmt = (struct ieee80211_mgmt *) skb->data;
3046 fc = le16_to_cpu(mgmt->frame_control);
3047
3048 sdata_lock(sdata);
3049
3050 switch (fc & IEEE80211_FCTL_STYPE) {
3051 case IEEE80211_STYPE_BEACON:
3052 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3053 break;
3054 case IEEE80211_STYPE_PROBE_RESP:
3055 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3056 break;
3057 case IEEE80211_STYPE_AUTH:
3058 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3059 break;
3060 case IEEE80211_STYPE_DEAUTH:
3061 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3062 break;
3063 case IEEE80211_STYPE_DISASSOC:
3064 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3065 break;
3066 case IEEE80211_STYPE_ASSOC_RESP:
3067 case IEEE80211_STYPE_REASSOC_RESP:
3068 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3069 break;
3070 case IEEE80211_STYPE_ACTION:
3071 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3072 ies_len = skb->len -
3073 offsetof(struct ieee80211_mgmt,
3074 u.action.u.chan_switch.variable);
3075
3076 if (ies_len < 0)
3077 break;
3078
3079 ieee802_11_parse_elems(
3080 mgmt->u.action.u.chan_switch.variable,
3081 ies_len, true, &elems);
3082
3083 if (elems.parse_error)
3084 break;
3085
3086 ieee80211_sta_process_chanswitch(sdata,
3087 rx_status->mactime,
3088 &elems, false);
3089 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3090 ies_len = skb->len -
3091 offsetof(struct ieee80211_mgmt,
3092 u.action.u.ext_chan_switch.variable);
3093
3094 if (ies_len < 0)
3095 break;
3096
3097 ieee802_11_parse_elems(
3098 mgmt->u.action.u.ext_chan_switch.variable,
3099 ies_len, true, &elems);
3100
3101 if (elems.parse_error)
3102 break;
3103
3104 /* for the handling code pretend this was also an IE */
3105 elems.ext_chansw_ie =
3106 &mgmt->u.action.u.ext_chan_switch.data;
3107
3108 ieee80211_sta_process_chanswitch(sdata,
3109 rx_status->mactime,
3110 &elems, false);
3111 }
3112 break;
3113 }
3114 sdata_unlock(sdata);
3115 }
3116
3117 static void ieee80211_sta_timer(unsigned long data)
3118 {
3119 struct ieee80211_sub_if_data *sdata =
3120 (struct ieee80211_sub_if_data *) data;
3121
3122 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3123 }
3124
3125 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3126 u8 *bssid, u8 reason, bool tx)
3127 {
3128 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3129
3130 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3131 tx, frame_buf);
3132
3133 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3134 IEEE80211_DEAUTH_FRAME_LEN);
3135 }
3136
3137 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3138 {
3139 struct ieee80211_local *local = sdata->local;
3140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3141 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3142 u32 tx_flags = 0;
3143
3144 sdata_assert_lock(sdata);
3145
3146 if (WARN_ON_ONCE(!auth_data))
3147 return -EINVAL;
3148
3149 auth_data->tries++;
3150
3151 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3152 sdata_info(sdata, "authentication with %pM timed out\n",
3153 auth_data->bss->bssid);
3154
3155 /*
3156 * Most likely AP is not in the range so remove the
3157 * bss struct for that AP.
3158 */
3159 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3160
3161 return -ETIMEDOUT;
3162 }
3163
3164 drv_mgd_prepare_tx(local, sdata);
3165
3166 if (auth_data->bss->proberesp_ies) {
3167 u16 trans = 1;
3168 u16 status = 0;
3169
3170 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3171 auth_data->bss->bssid, auth_data->tries,
3172 IEEE80211_AUTH_MAX_TRIES);
3173
3174 auth_data->expected_transaction = 2;
3175
3176 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3177 trans = auth_data->sae_trans;
3178 status = auth_data->sae_status;
3179 auth_data->expected_transaction = trans;
3180 }
3181
3182 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3183 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3184 IEEE80211_TX_INTFL_MLME_CONN_TX;
3185
3186 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3187 auth_data->data, auth_data->data_len,
3188 auth_data->bss->bssid,
3189 auth_data->bss->bssid, NULL, 0, 0,
3190 tx_flags);
3191 } else {
3192 const u8 *ssidie;
3193
3194 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3195 auth_data->bss->bssid, auth_data->tries,
3196 IEEE80211_AUTH_MAX_TRIES);
3197
3198 rcu_read_lock();
3199 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3200 if (!ssidie) {
3201 rcu_read_unlock();
3202 return -EINVAL;
3203 }
3204 /*
3205 * Direct probe is sent to broadcast address as some APs
3206 * will not answer to direct packet in unassociated state.
3207 */
3208 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3209 NULL, 0, (u32) -1, true, 0,
3210 auth_data->bss->channel, false);
3211 rcu_read_unlock();
3212 }
3213
3214 if (tx_flags == 0) {
3215 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3216 auth_data->timeout_started = true;
3217 run_again(sdata, auth_data->timeout);
3218 } else {
3219 auth_data->timeout =
3220 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3221 auth_data->timeout_started = true;
3222 run_again(sdata, auth_data->timeout);
3223 }
3224
3225 return 0;
3226 }
3227
3228 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3229 {
3230 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3231 struct ieee80211_local *local = sdata->local;
3232
3233 sdata_assert_lock(sdata);
3234
3235 assoc_data->tries++;
3236 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3237 sdata_info(sdata, "association with %pM timed out\n",
3238 assoc_data->bss->bssid);
3239
3240 /*
3241 * Most likely AP is not in the range so remove the
3242 * bss struct for that AP.
3243 */
3244 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3245
3246 return -ETIMEDOUT;
3247 }
3248
3249 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3250 assoc_data->bss->bssid, assoc_data->tries,
3251 IEEE80211_ASSOC_MAX_TRIES);
3252 ieee80211_send_assoc(sdata);
3253
3254 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3255 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3256 assoc_data->timeout_started = true;
3257 run_again(sdata, assoc_data->timeout);
3258 } else {
3259 assoc_data->timeout =
3260 round_jiffies_up(jiffies +
3261 IEEE80211_ASSOC_TIMEOUT_LONG);
3262 assoc_data->timeout_started = true;
3263 run_again(sdata, assoc_data->timeout);
3264 }
3265
3266 return 0;
3267 }
3268
3269 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3270 __le16 fc, bool acked)
3271 {
3272 struct ieee80211_local *local = sdata->local;
3273
3274 sdata->u.mgd.status_fc = fc;
3275 sdata->u.mgd.status_acked = acked;
3276 sdata->u.mgd.status_received = true;
3277
3278 ieee80211_queue_work(&local->hw, &sdata->work);
3279 }
3280
3281 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3282 {
3283 struct ieee80211_local *local = sdata->local;
3284 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3285
3286 sdata_lock(sdata);
3287
3288 if (ifmgd->status_received) {
3289 __le16 fc = ifmgd->status_fc;
3290 bool status_acked = ifmgd->status_acked;
3291
3292 ifmgd->status_received = false;
3293 if (ifmgd->auth_data &&
3294 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3295 if (status_acked) {
3296 ifmgd->auth_data->timeout =
3297 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3298 run_again(sdata, ifmgd->auth_data->timeout);
3299 } else {
3300 ifmgd->auth_data->timeout = jiffies - 1;
3301 }
3302 ifmgd->auth_data->timeout_started = true;
3303 } else if (ifmgd->assoc_data &&
3304 (ieee80211_is_assoc_req(fc) ||
3305 ieee80211_is_reassoc_req(fc))) {
3306 if (status_acked) {
3307 ifmgd->assoc_data->timeout =
3308 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3309 run_again(sdata, ifmgd->assoc_data->timeout);
3310 } else {
3311 ifmgd->assoc_data->timeout = jiffies - 1;
3312 }
3313 ifmgd->assoc_data->timeout_started = true;
3314 }
3315 }
3316
3317 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3318 time_after(jiffies, ifmgd->auth_data->timeout)) {
3319 if (ifmgd->auth_data->done) {
3320 /*
3321 * ok ... we waited for assoc but userspace didn't,
3322 * so let's just kill the auth data
3323 */
3324 ieee80211_destroy_auth_data(sdata, false);
3325 } else if (ieee80211_probe_auth(sdata)) {
3326 u8 bssid[ETH_ALEN];
3327
3328 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3329
3330 ieee80211_destroy_auth_data(sdata, false);
3331
3332 cfg80211_auth_timeout(sdata->dev, bssid);
3333 }
3334 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3335 run_again(sdata, ifmgd->auth_data->timeout);
3336
3337 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3338 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3339 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3340 ieee80211_do_assoc(sdata)) {
3341 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3342
3343 ieee80211_destroy_assoc_data(sdata, false);
3344 cfg80211_assoc_timeout(sdata->dev, bss);
3345 }
3346 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3347 run_again(sdata, ifmgd->assoc_data->timeout);
3348
3349 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3350 ifmgd->associated) {
3351 u8 bssid[ETH_ALEN];
3352 int max_tries;
3353
3354 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3355
3356 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3357 max_tries = max_nullfunc_tries;
3358 else
3359 max_tries = max_probe_tries;
3360
3361 /* ACK received for nullfunc probing frame */
3362 if (!ifmgd->probe_send_count)
3363 ieee80211_reset_ap_probe(sdata);
3364 else if (ifmgd->nullfunc_failed) {
3365 if (ifmgd->probe_send_count < max_tries) {
3366 mlme_dbg(sdata,
3367 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3368 bssid, ifmgd->probe_send_count,
3369 max_tries);
3370 ieee80211_mgd_probe_ap_send(sdata);
3371 } else {
3372 mlme_dbg(sdata,
3373 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3374 bssid);
3375 ieee80211_sta_connection_lost(sdata, bssid,
3376 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3377 false);
3378 }
3379 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3380 run_again(sdata, ifmgd->probe_timeout);
3381 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3382 mlme_dbg(sdata,
3383 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3384 bssid, probe_wait_ms);
3385 ieee80211_sta_connection_lost(sdata, bssid,
3386 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3387 } else if (ifmgd->probe_send_count < max_tries) {
3388 mlme_dbg(sdata,
3389 "No probe response from AP %pM after %dms, try %d/%i\n",
3390 bssid, probe_wait_ms,
3391 ifmgd->probe_send_count, max_tries);
3392 ieee80211_mgd_probe_ap_send(sdata);
3393 } else {
3394 /*
3395 * We actually lost the connection ... or did we?
3396 * Let's make sure!
3397 */
3398 wiphy_debug(local->hw.wiphy,
3399 "%s: No probe response from AP %pM"
3400 " after %dms, disconnecting.\n",
3401 sdata->name,
3402 bssid, probe_wait_ms);
3403
3404 ieee80211_sta_connection_lost(sdata, bssid,
3405 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3406 }
3407 }
3408
3409 sdata_unlock(sdata);
3410 }
3411
3412 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3413 {
3414 struct ieee80211_sub_if_data *sdata =
3415 (struct ieee80211_sub_if_data *) data;
3416 struct ieee80211_local *local = sdata->local;
3417
3418 if (local->quiescing)
3419 return;
3420
3421 sdata->u.mgd.connection_loss = false;
3422 ieee80211_queue_work(&sdata->local->hw,
3423 &sdata->u.mgd.beacon_connection_loss_work);
3424 }
3425
3426 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3427 {
3428 struct ieee80211_sub_if_data *sdata =
3429 (struct ieee80211_sub_if_data *) data;
3430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3431 struct ieee80211_local *local = sdata->local;
3432
3433 if (local->quiescing)
3434 return;
3435
3436 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3437 }
3438
3439 static void ieee80211_sta_monitor_work(struct work_struct *work)
3440 {
3441 struct ieee80211_sub_if_data *sdata =
3442 container_of(work, struct ieee80211_sub_if_data,
3443 u.mgd.monitor_work);
3444
3445 ieee80211_mgd_probe_ap(sdata, false);
3446 }
3447
3448 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3449 {
3450 u32 flags;
3451
3452 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3453 __ieee80211_stop_poll(sdata);
3454
3455 /* let's probe the connection once */
3456 flags = sdata->local->hw.flags;
3457 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3458 ieee80211_queue_work(&sdata->local->hw,
3459 &sdata->u.mgd.monitor_work);
3460 /* and do all the other regular work too */
3461 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3462 }
3463 }
3464
3465 #ifdef CONFIG_PM
3466 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3467 {
3468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3469
3470 sdata_lock(sdata);
3471 if (!ifmgd->associated) {
3472 sdata_unlock(sdata);
3473 return;
3474 }
3475
3476 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3477 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3478 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3479 ieee80211_sta_connection_lost(sdata,
3480 ifmgd->associated->bssid,
3481 WLAN_REASON_UNSPECIFIED,
3482 true);
3483 sdata_unlock(sdata);
3484 return;
3485 }
3486 sdata_unlock(sdata);
3487 }
3488 #endif
3489
3490 /* interface setup */
3491 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3492 {
3493 struct ieee80211_if_managed *ifmgd;
3494
3495 ifmgd = &sdata->u.mgd;
3496 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3497 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3498 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3499 ieee80211_beacon_connection_loss_work);
3500 INIT_WORK(&ifmgd->csa_connection_drop_work,
3501 ieee80211_csa_connection_drop_work);
3502 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3503 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3504 (unsigned long) sdata);
3505 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3506 (unsigned long) sdata);
3507 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3508 (unsigned long) sdata);
3509 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3510 (unsigned long) sdata);
3511
3512 ifmgd->flags = 0;
3513 ifmgd->powersave = sdata->wdev.ps;
3514 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3515 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3516 ifmgd->p2p_noa_index = -1;
3517
3518 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3519 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3520 else
3521 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3522 }
3523
3524 /* scan finished notification */
3525 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3526 {
3527 struct ieee80211_sub_if_data *sdata;
3528
3529 /* Restart STA timers */
3530 rcu_read_lock();
3531 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3532 if (ieee80211_sdata_running(sdata))
3533 ieee80211_restart_sta_timer(sdata);
3534 }
3535 rcu_read_unlock();
3536 }
3537
3538 int ieee80211_max_network_latency(struct notifier_block *nb,
3539 unsigned long data, void *dummy)
3540 {
3541 s32 latency_usec = (s32) data;
3542 struct ieee80211_local *local =
3543 container_of(nb, struct ieee80211_local,
3544 network_latency_notifier);
3545
3546 mutex_lock(&local->iflist_mtx);
3547 ieee80211_recalc_ps(local, latency_usec);
3548 mutex_unlock(&local->iflist_mtx);
3549
3550 return 0;
3551 }
3552
3553 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3554 struct cfg80211_bss *cbss)
3555 {
3556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3557 const u8 *ht_cap_ie, *vht_cap_ie;
3558 const struct ieee80211_ht_cap *ht_cap;
3559 const struct ieee80211_vht_cap *vht_cap;
3560 u8 chains = 1;
3561
3562 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3563 return chains;
3564
3565 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3566 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3567 ht_cap = (void *)(ht_cap_ie + 2);
3568 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3569 /*
3570 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3571 * "Tx Unequal Modulation Supported" fields.
3572 */
3573 }
3574
3575 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3576 return chains;
3577
3578 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3579 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3580 u8 nss;
3581 u16 tx_mcs_map;
3582
3583 vht_cap = (void *)(vht_cap_ie + 2);
3584 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3585 for (nss = 8; nss > 0; nss--) {
3586 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3587 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3588 break;
3589 }
3590 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3591 chains = max(chains, nss);
3592 }
3593
3594 return chains;
3595 }
3596
3597 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3598 struct cfg80211_bss *cbss)
3599 {
3600 struct ieee80211_local *local = sdata->local;
3601 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3602 const struct ieee80211_ht_operation *ht_oper = NULL;
3603 const struct ieee80211_vht_operation *vht_oper = NULL;
3604 struct ieee80211_supported_band *sband;
3605 struct cfg80211_chan_def chandef;
3606 int ret;
3607
3608 sband = local->hw.wiphy->bands[cbss->channel->band];
3609
3610 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3611 IEEE80211_STA_DISABLE_80P80MHZ |
3612 IEEE80211_STA_DISABLE_160MHZ);
3613
3614 rcu_read_lock();
3615
3616 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3617 sband->ht_cap.ht_supported) {
3618 const u8 *ht_oper_ie, *ht_cap;
3619
3620 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3621 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3622 ht_oper = (void *)(ht_oper_ie + 2);
3623
3624 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3625 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3626 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3627 ht_oper = NULL;
3628 }
3629 }
3630
3631 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3632 sband->vht_cap.vht_supported) {
3633 const u8 *vht_oper_ie, *vht_cap;
3634
3635 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3636 WLAN_EID_VHT_OPERATION);
3637 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3638 vht_oper = (void *)(vht_oper_ie + 2);
3639 if (vht_oper && !ht_oper) {
3640 vht_oper = NULL;
3641 sdata_info(sdata,
3642 "AP advertised VHT without HT, disabling both\n");
3643 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3644 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3645 }
3646
3647 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3648 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3649 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3650 vht_oper = NULL;
3651 }
3652 }
3653
3654 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3655 cbss->channel,
3656 ht_oper, vht_oper,
3657 &chandef, false);
3658
3659 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3660 local->rx_chains);
3661
3662 rcu_read_unlock();
3663
3664 /* will change later if needed */
3665 sdata->smps_mode = IEEE80211_SMPS_OFF;
3666
3667 /*
3668 * If this fails (possibly due to channel context sharing
3669 * on incompatible channels, e.g. 80+80 and 160 sharing the
3670 * same control channel) try to use a smaller bandwidth.
3671 */
3672 ret = ieee80211_vif_use_channel(sdata, &chandef,
3673 IEEE80211_CHANCTX_SHARED);
3674
3675 /* don't downgrade for 5 and 10 MHz channels, though. */
3676 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3677 chandef.width == NL80211_CHAN_WIDTH_10)
3678 return ret;
3679
3680 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3681 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3682 ret = ieee80211_vif_use_channel(sdata, &chandef,
3683 IEEE80211_CHANCTX_SHARED);
3684 }
3685 return ret;
3686 }
3687
3688 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3689 struct cfg80211_bss *cbss, bool assoc)
3690 {
3691 struct ieee80211_local *local = sdata->local;
3692 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3693 struct ieee80211_bss *bss = (void *)cbss->priv;
3694 struct sta_info *new_sta = NULL;
3695 bool have_sta = false;
3696 int err;
3697
3698 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3699 return -EINVAL;
3700
3701 if (assoc) {
3702 rcu_read_lock();
3703 have_sta = sta_info_get(sdata, cbss->bssid);
3704 rcu_read_unlock();
3705 }
3706
3707 if (!have_sta) {
3708 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3709 if (!new_sta)
3710 return -ENOMEM;
3711 }
3712 if (new_sta) {
3713 u32 rates = 0, basic_rates = 0;
3714 bool have_higher_than_11mbit;
3715 int min_rate = INT_MAX, min_rate_index = -1;
3716 struct ieee80211_chanctx_conf *chanctx_conf;
3717 struct ieee80211_supported_band *sband;
3718 const struct cfg80211_bss_ies *ies;
3719 int shift;
3720 u32 rate_flags;
3721
3722 sband = local->hw.wiphy->bands[cbss->channel->band];
3723
3724 err = ieee80211_prep_channel(sdata, cbss);
3725 if (err) {
3726 sta_info_free(local, new_sta);
3727 return -EINVAL;
3728 }
3729 shift = ieee80211_vif_get_shift(&sdata->vif);
3730
3731 rcu_read_lock();
3732 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3733 if (WARN_ON(!chanctx_conf)) {
3734 rcu_read_unlock();
3735 return -EINVAL;
3736 }
3737 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3738 rcu_read_unlock();
3739
3740 ieee80211_get_rates(sband, bss->supp_rates,
3741 bss->supp_rates_len,
3742 &rates, &basic_rates,
3743 &have_higher_than_11mbit,
3744 &min_rate, &min_rate_index,
3745 shift, rate_flags);
3746
3747 /*
3748 * This used to be a workaround for basic rates missing
3749 * in the association response frame. Now that we no
3750 * longer use the basic rates from there, it probably
3751 * doesn't happen any more, but keep the workaround so
3752 * in case some *other* APs are buggy in different ways
3753 * we can connect -- with a warning.
3754 */
3755 if (!basic_rates && min_rate_index >= 0) {
3756 sdata_info(sdata,
3757 "No basic rates, using min rate instead\n");
3758 basic_rates = BIT(min_rate_index);
3759 }
3760
3761 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3762 sdata->vif.bss_conf.basic_rates = basic_rates;
3763
3764 /* cf. IEEE 802.11 9.2.12 */
3765 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3766 have_higher_than_11mbit)
3767 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3768 else
3769 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3770
3771 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3772
3773 /* set timing information */
3774 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3775 rcu_read_lock();
3776 ies = rcu_dereference(cbss->beacon_ies);
3777 if (ies) {
3778 const u8 *tim_ie;
3779
3780 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3781 sdata->vif.bss_conf.sync_device_ts =
3782 bss->device_ts_beacon;
3783 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3784 ies->data, ies->len);
3785 if (tim_ie && tim_ie[1] >= 2)
3786 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3787 else
3788 sdata->vif.bss_conf.sync_dtim_count = 0;
3789 } else if (!(local->hw.flags &
3790 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3791 ies = rcu_dereference(cbss->proberesp_ies);
3792 /* must be non-NULL since beacon IEs were NULL */
3793 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3794 sdata->vif.bss_conf.sync_device_ts =
3795 bss->device_ts_presp;
3796 sdata->vif.bss_conf.sync_dtim_count = 0;
3797 } else {
3798 sdata->vif.bss_conf.sync_tsf = 0;
3799 sdata->vif.bss_conf.sync_device_ts = 0;
3800 sdata->vif.bss_conf.sync_dtim_count = 0;
3801 }
3802 rcu_read_unlock();
3803
3804 /* tell driver about BSSID, basic rates and timing */
3805 ieee80211_bss_info_change_notify(sdata,
3806 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3807 BSS_CHANGED_BEACON_INT);
3808
3809 if (assoc)
3810 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3811
3812 err = sta_info_insert(new_sta);
3813 new_sta = NULL;
3814 if (err) {
3815 sdata_info(sdata,
3816 "failed to insert STA entry for the AP (error %d)\n",
3817 err);
3818 return err;
3819 }
3820 } else
3821 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3822
3823 return 0;
3824 }
3825
3826 /* config hooks */
3827 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3828 struct cfg80211_auth_request *req)
3829 {
3830 struct ieee80211_local *local = sdata->local;
3831 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3832 struct ieee80211_mgd_auth_data *auth_data;
3833 u16 auth_alg;
3834 int err;
3835
3836 /* prepare auth data structure */
3837
3838 switch (req->auth_type) {
3839 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3840 auth_alg = WLAN_AUTH_OPEN;
3841 break;
3842 case NL80211_AUTHTYPE_SHARED_KEY:
3843 if (IS_ERR(local->wep_tx_tfm))
3844 return -EOPNOTSUPP;
3845 auth_alg = WLAN_AUTH_SHARED_KEY;
3846 break;
3847 case NL80211_AUTHTYPE_FT:
3848 auth_alg = WLAN_AUTH_FT;
3849 break;
3850 case NL80211_AUTHTYPE_NETWORK_EAP:
3851 auth_alg = WLAN_AUTH_LEAP;
3852 break;
3853 case NL80211_AUTHTYPE_SAE:
3854 auth_alg = WLAN_AUTH_SAE;
3855 break;
3856 default:
3857 return -EOPNOTSUPP;
3858 }
3859
3860 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3861 req->ie_len, GFP_KERNEL);
3862 if (!auth_data)
3863 return -ENOMEM;
3864
3865 auth_data->bss = req->bss;
3866
3867 if (req->sae_data_len >= 4) {
3868 __le16 *pos = (__le16 *) req->sae_data;
3869 auth_data->sae_trans = le16_to_cpu(pos[0]);
3870 auth_data->sae_status = le16_to_cpu(pos[1]);
3871 memcpy(auth_data->data, req->sae_data + 4,
3872 req->sae_data_len - 4);
3873 auth_data->data_len += req->sae_data_len - 4;
3874 }
3875
3876 if (req->ie && req->ie_len) {
3877 memcpy(&auth_data->data[auth_data->data_len],
3878 req->ie, req->ie_len);
3879 auth_data->data_len += req->ie_len;
3880 }
3881
3882 if (req->key && req->key_len) {
3883 auth_data->key_len = req->key_len;
3884 auth_data->key_idx = req->key_idx;
3885 memcpy(auth_data->key, req->key, req->key_len);
3886 }
3887
3888 auth_data->algorithm = auth_alg;
3889
3890 /* try to authenticate/probe */
3891
3892 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3893 ifmgd->assoc_data) {
3894 err = -EBUSY;
3895 goto err_free;
3896 }
3897
3898 if (ifmgd->auth_data)
3899 ieee80211_destroy_auth_data(sdata, false);
3900
3901 /* prep auth_data so we don't go into idle on disassoc */
3902 ifmgd->auth_data = auth_data;
3903
3904 if (ifmgd->associated) {
3905 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3906
3907 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3908 WLAN_REASON_UNSPECIFIED,
3909 false, frame_buf);
3910
3911 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3912 sizeof(frame_buf));
3913 }
3914
3915 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3916
3917 err = ieee80211_prep_connection(sdata, req->bss, false);
3918 if (err)
3919 goto err_clear;
3920
3921 err = ieee80211_probe_auth(sdata);
3922 if (err) {
3923 sta_info_destroy_addr(sdata, req->bss->bssid);
3924 goto err_clear;
3925 }
3926
3927 /* hold our own reference */
3928 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
3929 return 0;
3930
3931 err_clear:
3932 memset(ifmgd->bssid, 0, ETH_ALEN);
3933 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3934 ifmgd->auth_data = NULL;
3935 err_free:
3936 kfree(auth_data);
3937 return err;
3938 }
3939
3940 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3941 struct cfg80211_assoc_request *req)
3942 {
3943 struct ieee80211_local *local = sdata->local;
3944 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3945 struct ieee80211_bss *bss = (void *)req->bss->priv;
3946 struct ieee80211_mgd_assoc_data *assoc_data;
3947 const struct cfg80211_bss_ies *beacon_ies;
3948 struct ieee80211_supported_band *sband;
3949 const u8 *ssidie, *ht_ie, *vht_ie;
3950 int i, err;
3951
3952 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3953 if (!assoc_data)
3954 return -ENOMEM;
3955
3956 rcu_read_lock();
3957 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3958 if (!ssidie) {
3959 rcu_read_unlock();
3960 kfree(assoc_data);
3961 return -EINVAL;
3962 }
3963 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3964 assoc_data->ssid_len = ssidie[1];
3965 rcu_read_unlock();
3966
3967 if (ifmgd->associated) {
3968 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3969
3970 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3971 WLAN_REASON_UNSPECIFIED,
3972 false, frame_buf);
3973
3974 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3975 sizeof(frame_buf));
3976 }
3977
3978 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3979 err = -EBUSY;
3980 goto err_free;
3981 }
3982
3983 if (ifmgd->assoc_data) {
3984 err = -EBUSY;
3985 goto err_free;
3986 }
3987
3988 if (ifmgd->auth_data) {
3989 bool match;
3990
3991 /* keep sta info, bssid if matching */
3992 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3993 ieee80211_destroy_auth_data(sdata, match);
3994 }
3995
3996 /* prepare assoc data */
3997
3998 ifmgd->beacon_crc_valid = false;
3999
4000 /*
4001 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4002 * We still associate in non-HT mode (11a/b/g) if any one of these
4003 * ciphers is configured as pairwise.
4004 * We can set this to true for non-11n hardware, that'll be checked
4005 * separately along with the peer capabilities.
4006 */
4007 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4008 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4009 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4010 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4011 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4012 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4013 netdev_info(sdata->dev,
4014 "disabling HT/VHT due to WEP/TKIP use\n");
4015 }
4016 }
4017
4018 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4019 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4020 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4021 }
4022
4023 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4024 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4025
4026 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4027 sband = local->hw.wiphy->bands[req->bss->channel->band];
4028 if (!sband->ht_cap.ht_supported ||
4029 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4030 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4031 if (!bss->wmm_used)
4032 netdev_info(sdata->dev,
4033 "disabling HT as WMM/QoS is not supported by the AP\n");
4034 }
4035
4036 /* disable VHT if we don't support it or the AP doesn't use WMM */
4037 if (!sband->vht_cap.vht_supported ||
4038 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4039 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4040 if (!bss->wmm_used)
4041 netdev_info(sdata->dev,
4042 "disabling VHT as WMM/QoS is not supported by the AP\n");
4043 }
4044
4045 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4046 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4047 sizeof(ifmgd->ht_capa_mask));
4048
4049 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4050 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4051 sizeof(ifmgd->vht_capa_mask));
4052
4053 if (req->ie && req->ie_len) {
4054 memcpy(assoc_data->ie, req->ie, req->ie_len);
4055 assoc_data->ie_len = req->ie_len;
4056 }
4057
4058 assoc_data->bss = req->bss;
4059
4060 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4061 if (ifmgd->powersave)
4062 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4063 else
4064 sdata->smps_mode = IEEE80211_SMPS_OFF;
4065 } else
4066 sdata->smps_mode = ifmgd->req_smps;
4067
4068 assoc_data->capability = req->bss->capability;
4069 assoc_data->wmm = bss->wmm_used &&
4070 (local->hw.queues >= IEEE80211_NUM_ACS);
4071 assoc_data->supp_rates = bss->supp_rates;
4072 assoc_data->supp_rates_len = bss->supp_rates_len;
4073
4074 rcu_read_lock();
4075 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4076 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4077 assoc_data->ap_ht_param =
4078 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4079 else
4080 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4081 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4082 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4083 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4084 sizeof(struct ieee80211_vht_cap));
4085 else
4086 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4087 rcu_read_unlock();
4088
4089 if (bss->wmm_used && bss->uapsd_supported &&
4090 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4091 sdata->wmm_acm != 0xff) {
4092 assoc_data->uapsd = true;
4093 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4094 } else {
4095 assoc_data->uapsd = false;
4096 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4097 }
4098
4099 if (req->prev_bssid)
4100 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4101
4102 if (req->use_mfp) {
4103 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4104 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4105 } else {
4106 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4107 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4108 }
4109
4110 if (req->crypto.control_port)
4111 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4112 else
4113 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4114
4115 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4116 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4117
4118 /* kick off associate process */
4119
4120 ifmgd->assoc_data = assoc_data;
4121 ifmgd->dtim_period = 0;
4122 ifmgd->have_beacon = false;
4123
4124 err = ieee80211_prep_connection(sdata, req->bss, true);
4125 if (err)
4126 goto err_clear;
4127
4128 rcu_read_lock();
4129 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4130
4131 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4132 !beacon_ies) {
4133 /*
4134 * Wait up to one beacon interval ...
4135 * should this be more if we miss one?
4136 */
4137 sdata_info(sdata, "waiting for beacon from %pM\n",
4138 ifmgd->bssid);
4139 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4140 assoc_data->timeout_started = true;
4141 assoc_data->need_beacon = true;
4142 } else if (beacon_ies) {
4143 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4144 beacon_ies->data,
4145 beacon_ies->len);
4146 u8 dtim_count = 0;
4147
4148 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4149 const struct ieee80211_tim_ie *tim;
4150 tim = (void *)(tim_ie + 2);
4151 ifmgd->dtim_period = tim->dtim_period;
4152 dtim_count = tim->dtim_count;
4153 }
4154 ifmgd->have_beacon = true;
4155 assoc_data->timeout = jiffies;
4156 assoc_data->timeout_started = true;
4157
4158 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4159 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4160 sdata->vif.bss_conf.sync_device_ts =
4161 bss->device_ts_beacon;
4162 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4163 }
4164 } else {
4165 assoc_data->timeout = jiffies;
4166 assoc_data->timeout_started = true;
4167 }
4168 rcu_read_unlock();
4169
4170 run_again(sdata, assoc_data->timeout);
4171
4172 if (bss->corrupt_data) {
4173 char *corrupt_type = "data";
4174 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4175 if (bss->corrupt_data &
4176 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4177 corrupt_type = "beacon and probe response";
4178 else
4179 corrupt_type = "beacon";
4180 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4181 corrupt_type = "probe response";
4182 sdata_info(sdata, "associating with AP with corrupt %s\n",
4183 corrupt_type);
4184 }
4185
4186 return 0;
4187 err_clear:
4188 memset(ifmgd->bssid, 0, ETH_ALEN);
4189 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4190 ifmgd->assoc_data = NULL;
4191 err_free:
4192 kfree(assoc_data);
4193 return err;
4194 }
4195
4196 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4197 struct cfg80211_deauth_request *req)
4198 {
4199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4200 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4201 bool tx = !req->local_state_change;
4202 bool report_frame = false;
4203
4204 sdata_info(sdata,
4205 "deauthenticating from %pM by local choice (reason=%d)\n",
4206 req->bssid, req->reason_code);
4207
4208 if (ifmgd->auth_data) {
4209 drv_mgd_prepare_tx(sdata->local, sdata);
4210 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4211 IEEE80211_STYPE_DEAUTH,
4212 req->reason_code, tx,
4213 frame_buf);
4214 ieee80211_destroy_auth_data(sdata, false);
4215
4216 report_frame = true;
4217 goto out;
4218 }
4219
4220 if (ifmgd->associated &&
4221 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4222 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4223 req->reason_code, tx, frame_buf);
4224 report_frame = true;
4225 }
4226
4227 out:
4228 if (report_frame)
4229 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4230 IEEE80211_DEAUTH_FRAME_LEN);
4231
4232 return 0;
4233 }
4234
4235 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4236 struct cfg80211_disassoc_request *req)
4237 {
4238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4239 u8 bssid[ETH_ALEN];
4240 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4241
4242 /*
4243 * cfg80211 should catch this ... but it's racy since
4244 * we can receive a disassoc frame, process it, hand it
4245 * to cfg80211 while that's in a locked section already
4246 * trying to tell us that the user wants to disconnect.
4247 */
4248 if (ifmgd->associated != req->bss)
4249 return -ENOLINK;
4250
4251 sdata_info(sdata,
4252 "disassociating from %pM by local choice (reason=%d)\n",
4253 req->bss->bssid, req->reason_code);
4254
4255 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4256 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4257 req->reason_code, !req->local_state_change,
4258 frame_buf);
4259
4260 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4261 IEEE80211_DEAUTH_FRAME_LEN);
4262
4263 return 0;
4264 }
4265
4266 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4267 {
4268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4269
4270 /*
4271 * Make sure some work items will not run after this,
4272 * they will not do anything but might not have been
4273 * cancelled when disconnecting.
4274 */
4275 cancel_work_sync(&ifmgd->monitor_work);
4276 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4277 cancel_work_sync(&ifmgd->request_smps_work);
4278 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4279 cancel_work_sync(&ifmgd->chswitch_work);
4280
4281 sdata_lock(sdata);
4282 if (ifmgd->assoc_data) {
4283 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4284 ieee80211_destroy_assoc_data(sdata, false);
4285 cfg80211_assoc_timeout(sdata->dev, bss);
4286 }
4287 if (ifmgd->auth_data)
4288 ieee80211_destroy_auth_data(sdata, false);
4289 del_timer_sync(&ifmgd->timer);
4290 sdata_unlock(sdata);
4291 }
4292
4293 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4294 enum nl80211_cqm_rssi_threshold_event rssi_event,
4295 gfp_t gfp)
4296 {
4297 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4298
4299 trace_api_cqm_rssi_notify(sdata, rssi_event);
4300
4301 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4302 }
4303 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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