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cpufreq: imx6q: correct VDDSOC/PU voltage scaling when cpufreq is changed
[linux/fpc-iii.git] / net / mac80211 / mlme.c
blobb3a3ce316656ce8406859a3cdc325fa262e024a5
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 struct ieee80211_csa_ie csa_ie;
962 int res;
963
964 sdata_assert_lock(sdata);
965
966 if (!cbss)
967 return;
968
969 if (local->scanning)
970 return;
971
972 /* disregard subsequent announcements if we are already processing */
973 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
974 return;
975
976 current_band = cbss->channel->band;
977 memset(&csa_ie, 0, sizeof(csa_ie));
978 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
979 ifmgd->flags,
980 ifmgd->associated->bssid, &csa_ie);
981 if (res < 0)
982 ieee80211_queue_work(&local->hw,
983 &ifmgd->csa_connection_drop_work);
984 if (res)
985 return;
986
987 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
988 IEEE80211_CHAN_DISABLED)) {
989 sdata_info(sdata,
990 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
991 ifmgd->associated->bssid,
992 csa_ie.chandef.chan->center_freq,
993 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
994 csa_ie.chandef.center_freq2);
995 ieee80211_queue_work(&local->hw,
996 &ifmgd->csa_connection_drop_work);
997 return;
998 }
999
1000 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1001 sdata->vif.csa_active = true;
1002
1003 mutex_lock(&local->chanctx_mtx);
1004 if (local->use_chanctx) {
1005 u32 num_chanctx = 0;
1006 list_for_each_entry(chanctx, &local->chanctx_list, list)
1007 num_chanctx++;
1008
1009 if (num_chanctx > 1 ||
1010 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1011 sdata_info(sdata,
1012 "not handling chan-switch with channel contexts\n");
1013 ieee80211_queue_work(&local->hw,
1014 &ifmgd->csa_connection_drop_work);
1015 mutex_unlock(&local->chanctx_mtx);
1016 return;
1017 }
1018 }
1019
1020 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1021 ieee80211_queue_work(&local->hw,
1022 &ifmgd->csa_connection_drop_work);
1023 mutex_unlock(&local->chanctx_mtx);
1024 return;
1025 }
1026 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1027 struct ieee80211_chanctx, conf);
1028 if (chanctx->refcount > 1) {
1029 sdata_info(sdata,
1030 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1031 ieee80211_queue_work(&local->hw,
1032 &ifmgd->csa_connection_drop_work);
1033 mutex_unlock(&local->chanctx_mtx);
1034 return;
1035 }
1036 mutex_unlock(&local->chanctx_mtx);
1037
1038 local->csa_chandef = csa_ie.chandef;
1039
1040 if (csa_ie.mode)
1041 ieee80211_stop_queues_by_reason(&local->hw,
1042 IEEE80211_MAX_QUEUE_MAP,
1043 IEEE80211_QUEUE_STOP_REASON_CSA);
1044
1045 if (local->ops->channel_switch) {
1046 /* use driver's channel switch callback */
1047 struct ieee80211_channel_switch ch_switch = {
1048 .timestamp = timestamp,
1049 .block_tx = csa_ie.mode,
1050 .chandef = csa_ie.chandef,
1051 .count = csa_ie.count,
1052 };
1053
1054 drv_channel_switch(local, &ch_switch);
1055 return;
1056 }
1057
1058 /* channel switch handled in software */
1059 if (csa_ie.count <= 1)
1060 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1061 else
1062 mod_timer(&ifmgd->chswitch_timer,
1063 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1064 }
1065
1066 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1067 struct ieee80211_channel *channel,
1068 const u8 *country_ie, u8 country_ie_len,
1069 const u8 *pwr_constr_elem)
1070 {
1071 struct ieee80211_country_ie_triplet *triplet;
1072 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1073 int i, chan_pwr, chan_increment, new_ap_level;
1074 bool have_chan_pwr = false;
1075
1076 /* Invalid IE */
1077 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1078 return 0;
1079
1080 triplet = (void *)(country_ie + 3);
1081 country_ie_len -= 3;
1082
1083 switch (channel->band) {
1084 default:
1085 WARN_ON_ONCE(1);
1086 /* fall through */
1087 case IEEE80211_BAND_2GHZ:
1088 case IEEE80211_BAND_60GHZ:
1089 chan_increment = 1;
1090 break;
1091 case IEEE80211_BAND_5GHZ:
1092 chan_increment = 4;
1093 break;
1094 }
1095
1096 /* find channel */
1097 while (country_ie_len >= 3) {
1098 u8 first_channel = triplet->chans.first_channel;
1099
1100 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1101 goto next;
1102
1103 for (i = 0; i < triplet->chans.num_channels; i++) {
1104 if (first_channel + i * chan_increment == chan) {
1105 have_chan_pwr = true;
1106 chan_pwr = triplet->chans.max_power;
1107 break;
1108 }
1109 }
1110 if (have_chan_pwr)
1111 break;
1112
1113 next:
1114 triplet++;
1115 country_ie_len -= 3;
1116 }
1117
1118 if (!have_chan_pwr)
1119 return 0;
1120
1121 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1122
1123 if (sdata->ap_power_level == new_ap_level)
1124 return 0;
1125
1126 sdata_info(sdata,
1127 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1128 new_ap_level, chan_pwr, *pwr_constr_elem,
1129 sdata->u.mgd.bssid);
1130 sdata->ap_power_level = new_ap_level;
1131 if (__ieee80211_recalc_txpower(sdata))
1132 return BSS_CHANGED_TXPOWER;
1133 return 0;
1134 }
1135
1136 /* powersave */
1137 static void ieee80211_enable_ps(struct ieee80211_local *local,
1138 struct ieee80211_sub_if_data *sdata)
1139 {
1140 struct ieee80211_conf *conf = &local->hw.conf;
1141
1142 /*
1143 * If we are scanning right now then the parameters will
1144 * take effect when scan finishes.
1145 */
1146 if (local->scanning)
1147 return;
1148
1149 if (conf->dynamic_ps_timeout > 0 &&
1150 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1151 mod_timer(&local->dynamic_ps_timer, jiffies +
1152 msecs_to_jiffies(conf->dynamic_ps_timeout));
1153 } else {
1154 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1155 ieee80211_send_nullfunc(local, sdata, 1);
1156
1157 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1158 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1159 return;
1160
1161 conf->flags |= IEEE80211_CONF_PS;
1162 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1163 }
1164 }
1165
1166 static void ieee80211_change_ps(struct ieee80211_local *local)
1167 {
1168 struct ieee80211_conf *conf = &local->hw.conf;
1169
1170 if (local->ps_sdata) {
1171 ieee80211_enable_ps(local, local->ps_sdata);
1172 } else if (conf->flags & IEEE80211_CONF_PS) {
1173 conf->flags &= ~IEEE80211_CONF_PS;
1174 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1175 del_timer_sync(&local->dynamic_ps_timer);
1176 cancel_work_sync(&local->dynamic_ps_enable_work);
1177 }
1178 }
1179
1180 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1181 {
1182 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1183 struct sta_info *sta = NULL;
1184 bool authorized = false;
1185
1186 if (!mgd->powersave)
1187 return false;
1188
1189 if (mgd->broken_ap)
1190 return false;
1191
1192 if (!mgd->associated)
1193 return false;
1194
1195 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1196 return false;
1197
1198 if (!mgd->have_beacon)
1199 return false;
1200
1201 rcu_read_lock();
1202 sta = sta_info_get(sdata, mgd->bssid);
1203 if (sta)
1204 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1205 rcu_read_unlock();
1206
1207 return authorized;
1208 }
1209
1210 /* need to hold RTNL or interface lock */
1211 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1212 {
1213 struct ieee80211_sub_if_data *sdata, *found = NULL;
1214 int count = 0;
1215 int timeout;
1216
1217 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1218 local->ps_sdata = NULL;
1219 return;
1220 }
1221
1222 list_for_each_entry(sdata, &local->interfaces, list) {
1223 if (!ieee80211_sdata_running(sdata))
1224 continue;
1225 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1226 /* If an AP vif is found, then disable PS
1227 * by setting the count to zero thereby setting
1228 * ps_sdata to NULL.
1229 */
1230 count = 0;
1231 break;
1232 }
1233 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1234 continue;
1235 found = sdata;
1236 count++;
1237 }
1238
1239 if (count == 1 && ieee80211_powersave_allowed(found)) {
1240 s32 beaconint_us;
1241
1242 if (latency < 0)
1243 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1244
1245 beaconint_us = ieee80211_tu_to_usec(
1246 found->vif.bss_conf.beacon_int);
1247
1248 timeout = local->dynamic_ps_forced_timeout;
1249 if (timeout < 0) {
1250 /*
1251 * Go to full PSM if the user configures a very low
1252 * latency requirement.
1253 * The 2000 second value is there for compatibility
1254 * until the PM_QOS_NETWORK_LATENCY is configured
1255 * with real values.
1256 */
1257 if (latency > (1900 * USEC_PER_MSEC) &&
1258 latency != (2000 * USEC_PER_SEC))
1259 timeout = 0;
1260 else
1261 timeout = 100;
1262 }
1263 local->hw.conf.dynamic_ps_timeout = timeout;
1264
1265 if (beaconint_us > latency) {
1266 local->ps_sdata = NULL;
1267 } else {
1268 int maxslp = 1;
1269 u8 dtimper = found->u.mgd.dtim_period;
1270
1271 /* If the TIM IE is invalid, pretend the value is 1 */
1272 if (!dtimper)
1273 dtimper = 1;
1274 else if (dtimper > 1)
1275 maxslp = min_t(int, dtimper,
1276 latency / beaconint_us);
1277
1278 local->hw.conf.max_sleep_period = maxslp;
1279 local->hw.conf.ps_dtim_period = dtimper;
1280 local->ps_sdata = found;
1281 }
1282 } else {
1283 local->ps_sdata = NULL;
1284 }
1285
1286 ieee80211_change_ps(local);
1287 }
1288
1289 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1290 {
1291 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1292
1293 if (sdata->vif.bss_conf.ps != ps_allowed) {
1294 sdata->vif.bss_conf.ps = ps_allowed;
1295 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1296 }
1297 }
1298
1299 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1300 {
1301 struct ieee80211_local *local =
1302 container_of(work, struct ieee80211_local,
1303 dynamic_ps_disable_work);
1304
1305 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1306 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1307 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1308 }
1309
1310 ieee80211_wake_queues_by_reason(&local->hw,
1311 IEEE80211_MAX_QUEUE_MAP,
1312 IEEE80211_QUEUE_STOP_REASON_PS);
1313 }
1314
1315 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1316 {
1317 struct ieee80211_local *local =
1318 container_of(work, struct ieee80211_local,
1319 dynamic_ps_enable_work);
1320 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1321 struct ieee80211_if_managed *ifmgd;
1322 unsigned long flags;
1323 int q;
1324
1325 /* can only happen when PS was just disabled anyway */
1326 if (!sdata)
1327 return;
1328
1329 ifmgd = &sdata->u.mgd;
1330
1331 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1332 return;
1333
1334 if (local->hw.conf.dynamic_ps_timeout > 0) {
1335 /* don't enter PS if TX frames are pending */
1336 if (drv_tx_frames_pending(local)) {
1337 mod_timer(&local->dynamic_ps_timer, jiffies +
1338 msecs_to_jiffies(
1339 local->hw.conf.dynamic_ps_timeout));
1340 return;
1341 }
1342
1343 /*
1344 * transmission can be stopped by others which leads to
1345 * dynamic_ps_timer expiry. Postpone the ps timer if it
1346 * is not the actual idle state.
1347 */
1348 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1349 for (q = 0; q < local->hw.queues; q++) {
1350 if (local->queue_stop_reasons[q]) {
1351 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1352 flags);
1353 mod_timer(&local->dynamic_ps_timer, jiffies +
1354 msecs_to_jiffies(
1355 local->hw.conf.dynamic_ps_timeout));
1356 return;
1357 }
1358 }
1359 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1360 }
1361
1362 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1363 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1364 if (drv_tx_frames_pending(local)) {
1365 mod_timer(&local->dynamic_ps_timer, jiffies +
1366 msecs_to_jiffies(
1367 local->hw.conf.dynamic_ps_timeout));
1368 } else {
1369 ieee80211_send_nullfunc(local, sdata, 1);
1370 /* Flush to get the tx status of nullfunc frame */
1371 ieee80211_flush_queues(local, sdata);
1372 }
1373 }
1374
1375 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1376 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1377 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1378 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1379 local->hw.conf.flags |= IEEE80211_CONF_PS;
1380 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1381 }
1382 }
1383
1384 void ieee80211_dynamic_ps_timer(unsigned long data)
1385 {
1386 struct ieee80211_local *local = (void *) data;
1387
1388 if (local->quiescing || local->suspended)
1389 return;
1390
1391 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1392 }
1393
1394 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1395 {
1396 struct delayed_work *delayed_work =
1397 container_of(work, struct delayed_work, work);
1398 struct ieee80211_sub_if_data *sdata =
1399 container_of(delayed_work, struct ieee80211_sub_if_data,
1400 dfs_cac_timer_work);
1401
1402 ieee80211_vif_release_channel(sdata);
1403
1404 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1405 }
1406
1407 /* MLME */
1408 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1409 struct ieee80211_sub_if_data *sdata,
1410 const u8 *wmm_param, size_t wmm_param_len)
1411 {
1412 struct ieee80211_tx_queue_params params;
1413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1414 size_t left;
1415 int count;
1416 const u8 *pos;
1417 u8 uapsd_queues = 0;
1418
1419 if (!local->ops->conf_tx)
1420 return false;
1421
1422 if (local->hw.queues < IEEE80211_NUM_ACS)
1423 return false;
1424
1425 if (!wmm_param)
1426 return false;
1427
1428 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1429 return false;
1430
1431 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1432 uapsd_queues = ifmgd->uapsd_queues;
1433
1434 count = wmm_param[6] & 0x0f;
1435 if (count == ifmgd->wmm_last_param_set)
1436 return false;
1437 ifmgd->wmm_last_param_set = count;
1438
1439 pos = wmm_param + 8;
1440 left = wmm_param_len - 8;
1441
1442 memset(&params, 0, sizeof(params));
1443
1444 sdata->wmm_acm = 0;
1445 for (; left >= 4; left -= 4, pos += 4) {
1446 int aci = (pos[0] >> 5) & 0x03;
1447 int acm = (pos[0] >> 4) & 0x01;
1448 bool uapsd = false;
1449 int queue;
1450
1451 switch (aci) {
1452 case 1: /* AC_BK */
1453 queue = 3;
1454 if (acm)
1455 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1456 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1457 uapsd = true;
1458 break;
1459 case 2: /* AC_VI */
1460 queue = 1;
1461 if (acm)
1462 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1463 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1464 uapsd = true;
1465 break;
1466 case 3: /* AC_VO */
1467 queue = 0;
1468 if (acm)
1469 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1470 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1471 uapsd = true;
1472 break;
1473 case 0: /* AC_BE */
1474 default:
1475 queue = 2;
1476 if (acm)
1477 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1478 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1479 uapsd = true;
1480 break;
1481 }
1482
1483 params.aifs = pos[0] & 0x0f;
1484 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1485 params.cw_min = ecw2cw(pos[1] & 0x0f);
1486 params.txop = get_unaligned_le16(pos + 2);
1487 params.acm = acm;
1488 params.uapsd = uapsd;
1489
1490 mlme_dbg(sdata,
1491 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1492 queue, aci, acm,
1493 params.aifs, params.cw_min, params.cw_max,
1494 params.txop, params.uapsd);
1495 sdata->tx_conf[queue] = params;
1496 if (drv_conf_tx(local, sdata, queue, &params))
1497 sdata_err(sdata,
1498 "failed to set TX queue parameters for queue %d\n",
1499 queue);
1500 }
1501
1502 /* enable WMM or activate new settings */
1503 sdata->vif.bss_conf.qos = true;
1504 return true;
1505 }
1506
1507 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1508 {
1509 lockdep_assert_held(&sdata->local->mtx);
1510
1511 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1512 ieee80211_run_deferred_scan(sdata->local);
1513 }
1514
1515 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1516 {
1517 mutex_lock(&sdata->local->mtx);
1518 __ieee80211_stop_poll(sdata);
1519 mutex_unlock(&sdata->local->mtx);
1520 }
1521
1522 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1523 u16 capab, bool erp_valid, u8 erp)
1524 {
1525 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1526 u32 changed = 0;
1527 bool use_protection;
1528 bool use_short_preamble;
1529 bool use_short_slot;
1530
1531 if (erp_valid) {
1532 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1533 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1534 } else {
1535 use_protection = false;
1536 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1537 }
1538
1539 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1540 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1541 use_short_slot = true;
1542
1543 if (use_protection != bss_conf->use_cts_prot) {
1544 bss_conf->use_cts_prot = use_protection;
1545 changed |= BSS_CHANGED_ERP_CTS_PROT;
1546 }
1547
1548 if (use_short_preamble != bss_conf->use_short_preamble) {
1549 bss_conf->use_short_preamble = use_short_preamble;
1550 changed |= BSS_CHANGED_ERP_PREAMBLE;
1551 }
1552
1553 if (use_short_slot != bss_conf->use_short_slot) {
1554 bss_conf->use_short_slot = use_short_slot;
1555 changed |= BSS_CHANGED_ERP_SLOT;
1556 }
1557
1558 return changed;
1559 }
1560
1561 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1562 struct cfg80211_bss *cbss,
1563 u32 bss_info_changed)
1564 {
1565 struct ieee80211_bss *bss = (void *)cbss->priv;
1566 struct ieee80211_local *local = sdata->local;
1567 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1568
1569 bss_info_changed |= BSS_CHANGED_ASSOC;
1570 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1571 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1572
1573 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1574 beacon_loss_count * bss_conf->beacon_int));
1575
1576 sdata->u.mgd.associated = cbss;
1577 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1578
1579 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1580
1581 if (sdata->vif.p2p) {
1582 const struct cfg80211_bss_ies *ies;
1583
1584 rcu_read_lock();
1585 ies = rcu_dereference(cbss->ies);
1586 if (ies) {
1587 int ret;
1588
1589 ret = cfg80211_get_p2p_attr(
1590 ies->data, ies->len,
1591 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1592 (u8 *) &bss_conf->p2p_noa_attr,
1593 sizeof(bss_conf->p2p_noa_attr));
1594 if (ret >= 2) {
1595 sdata->u.mgd.p2p_noa_index =
1596 bss_conf->p2p_noa_attr.index;
1597 bss_info_changed |= BSS_CHANGED_P2P_PS;
1598 }
1599 }
1600 rcu_read_unlock();
1601 }
1602
1603 /* just to be sure */
1604 ieee80211_stop_poll(sdata);
1605
1606 ieee80211_led_assoc(local, 1);
1607
1608 if (sdata->u.mgd.have_beacon) {
1609 /*
1610 * If the AP is buggy we may get here with no DTIM period
1611 * known, so assume it's 1 which is the only safe assumption
1612 * in that case, although if the TIM IE is broken powersave
1613 * probably just won't work at all.
1614 */
1615 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1616 bss_conf->beacon_rate = bss->beacon_rate;
1617 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1618 } else {
1619 bss_conf->beacon_rate = NULL;
1620 bss_conf->dtim_period = 0;
1621 }
1622
1623 bss_conf->assoc = 1;
1624
1625 /* Tell the driver to monitor connection quality (if supported) */
1626 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1627 bss_conf->cqm_rssi_thold)
1628 bss_info_changed |= BSS_CHANGED_CQM;
1629
1630 /* Enable ARP filtering */
1631 if (bss_conf->arp_addr_cnt)
1632 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1633
1634 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1635
1636 mutex_lock(&local->iflist_mtx);
1637 ieee80211_recalc_ps(local, -1);
1638 mutex_unlock(&local->iflist_mtx);
1639
1640 ieee80211_recalc_smps(sdata);
1641 ieee80211_recalc_ps_vif(sdata);
1642
1643 netif_carrier_on(sdata->dev);
1644 }
1645
1646 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1647 u16 stype, u16 reason, bool tx,
1648 u8 *frame_buf)
1649 {
1650 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1651 struct ieee80211_local *local = sdata->local;
1652 u32 changed = 0;
1653
1654 sdata_assert_lock(sdata);
1655
1656 if (WARN_ON_ONCE(tx && !frame_buf))
1657 return;
1658
1659 if (WARN_ON(!ifmgd->associated))
1660 return;
1661
1662 ieee80211_stop_poll(sdata);
1663
1664 ifmgd->associated = NULL;
1665 netif_carrier_off(sdata->dev);
1666
1667 /*
1668 * if we want to get out of ps before disassoc (why?) we have
1669 * to do it before sending disassoc, as otherwise the null-packet
1670 * won't be valid.
1671 */
1672 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1673 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1674 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1675 }
1676 local->ps_sdata = NULL;
1677
1678 /* disable per-vif ps */
1679 ieee80211_recalc_ps_vif(sdata);
1680
1681 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1682 if (tx)
1683 ieee80211_flush_queues(local, sdata);
1684
1685 /* deauthenticate/disassociate now */
1686 if (tx || frame_buf)
1687 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1688 reason, tx, frame_buf);
1689
1690 /* flush out frame */
1691 if (tx)
1692 ieee80211_flush_queues(local, sdata);
1693
1694 /* clear bssid only after building the needed mgmt frames */
1695 memset(ifmgd->bssid, 0, ETH_ALEN);
1696
1697 /* remove AP and TDLS peers */
1698 sta_info_flush_defer(sdata);
1699
1700 /* finally reset all BSS / config parameters */
1701 changed |= ieee80211_reset_erp_info(sdata);
1702
1703 ieee80211_led_assoc(local, 0);
1704 changed |= BSS_CHANGED_ASSOC;
1705 sdata->vif.bss_conf.assoc = false;
1706
1707 ifmgd->p2p_noa_index = -1;
1708 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1709 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1710
1711 /* on the next assoc, re-program HT/VHT parameters */
1712 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1713 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1714 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1715 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1716
1717 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1718
1719 del_timer_sync(&local->dynamic_ps_timer);
1720 cancel_work_sync(&local->dynamic_ps_enable_work);
1721
1722 /* Disable ARP filtering */
1723 if (sdata->vif.bss_conf.arp_addr_cnt)
1724 changed |= BSS_CHANGED_ARP_FILTER;
1725
1726 sdata->vif.bss_conf.qos = false;
1727 changed |= BSS_CHANGED_QOS;
1728
1729 /* The BSSID (not really interesting) and HT changed */
1730 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1731 ieee80211_bss_info_change_notify(sdata, changed);
1732
1733 /* disassociated - set to defaults now */
1734 ieee80211_set_wmm_default(sdata, false);
1735
1736 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1737 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1738 del_timer_sync(&sdata->u.mgd.timer);
1739 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1740
1741 sdata->vif.bss_conf.dtim_period = 0;
1742 sdata->vif.bss_conf.beacon_rate = NULL;
1743
1744 ifmgd->have_beacon = false;
1745
1746 ifmgd->flags = 0;
1747 ieee80211_vif_release_channel(sdata);
1748 }
1749
1750 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1751 struct ieee80211_hdr *hdr)
1752 {
1753 /*
1754 * We can postpone the mgd.timer whenever receiving unicast frames
1755 * from AP because we know that the connection is working both ways
1756 * at that time. But multicast frames (and hence also beacons) must
1757 * be ignored here, because we need to trigger the timer during
1758 * data idle periods for sending the periodic probe request to the
1759 * AP we're connected to.
1760 */
1761 if (is_multicast_ether_addr(hdr->addr1))
1762 return;
1763
1764 ieee80211_sta_reset_conn_monitor(sdata);
1765 }
1766
1767 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1768 {
1769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1770 struct ieee80211_local *local = sdata->local;
1771
1772 mutex_lock(&local->mtx);
1773 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1774 goto out;
1775
1776 __ieee80211_stop_poll(sdata);
1777
1778 mutex_lock(&local->iflist_mtx);
1779 ieee80211_recalc_ps(local, -1);
1780 mutex_unlock(&local->iflist_mtx);
1781
1782 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1783 goto out;
1784
1785 /*
1786 * We've received a probe response, but are not sure whether
1787 * we have or will be receiving any beacons or data, so let's
1788 * schedule the timers again, just in case.
1789 */
1790 ieee80211_sta_reset_beacon_monitor(sdata);
1791
1792 mod_timer(&ifmgd->conn_mon_timer,
1793 round_jiffies_up(jiffies +
1794 IEEE80211_CONNECTION_IDLE_TIME));
1795 out:
1796 mutex_unlock(&local->mtx);
1797 }
1798
1799 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1800 struct ieee80211_hdr *hdr, bool ack)
1801 {
1802 if (!ieee80211_is_data(hdr->frame_control))
1803 return;
1804
1805 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1806 sdata->u.mgd.probe_send_count > 0) {
1807 if (ack)
1808 ieee80211_sta_reset_conn_monitor(sdata);
1809 else
1810 sdata->u.mgd.nullfunc_failed = true;
1811 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1812 return;
1813 }
1814
1815 if (ack)
1816 ieee80211_sta_reset_conn_monitor(sdata);
1817 }
1818
1819 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1820 {
1821 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1822 const u8 *ssid;
1823 u8 *dst = ifmgd->associated->bssid;
1824 u8 unicast_limit = max(1, max_probe_tries - 3);
1825
1826 /*
1827 * Try sending broadcast probe requests for the last three
1828 * probe requests after the first ones failed since some
1829 * buggy APs only support broadcast probe requests.
1830 */
1831 if (ifmgd->probe_send_count >= unicast_limit)
1832 dst = NULL;
1833
1834 /*
1835 * When the hardware reports an accurate Tx ACK status, it's
1836 * better to send a nullfunc frame instead of a probe request,
1837 * as it will kick us off the AP quickly if we aren't associated
1838 * anymore. The timeout will be reset if the frame is ACKed by
1839 * the AP.
1840 */
1841 ifmgd->probe_send_count++;
1842
1843 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1844 ifmgd->nullfunc_failed = false;
1845 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1846 } else {
1847 int ssid_len;
1848
1849 rcu_read_lock();
1850 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1851 if (WARN_ON_ONCE(ssid == NULL))
1852 ssid_len = 0;
1853 else
1854 ssid_len = ssid[1];
1855
1856 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1857 0, (u32) -1, true, 0,
1858 ifmgd->associated->channel, false);
1859 rcu_read_unlock();
1860 }
1861
1862 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1863 run_again(sdata, ifmgd->probe_timeout);
1864 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1865 ieee80211_flush_queues(sdata->local, sdata);
1866 }
1867
1868 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1869 bool beacon)
1870 {
1871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1872 bool already = false;
1873
1874 if (!ieee80211_sdata_running(sdata))
1875 return;
1876
1877 sdata_lock(sdata);
1878
1879 if (!ifmgd->associated)
1880 goto out;
1881
1882 mutex_lock(&sdata->local->mtx);
1883
1884 if (sdata->local->tmp_channel || sdata->local->scanning) {
1885 mutex_unlock(&sdata->local->mtx);
1886 goto out;
1887 }
1888
1889 if (beacon) {
1890 mlme_dbg_ratelimited(sdata,
1891 "detected beacon loss from AP (missed %d beacons) - probing\n",
1892 beacon_loss_count);
1893
1894 ieee80211_cqm_rssi_notify(&sdata->vif,
1895 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1896 GFP_KERNEL);
1897 }
1898
1899 /*
1900 * The driver/our work has already reported this event or the
1901 * connection monitoring has kicked in and we have already sent
1902 * a probe request. Or maybe the AP died and the driver keeps
1903 * reporting until we disassociate...
1904 *
1905 * In either case we have to ignore the current call to this
1906 * function (except for setting the correct probe reason bit)
1907 * because otherwise we would reset the timer every time and
1908 * never check whether we received a probe response!
1909 */
1910 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1911 already = true;
1912
1913 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
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 (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 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 (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
2959 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2960 elems.wmm_param_len))
2961 changed |= BSS_CHANGED_QOS;
2962
2963 /*
2964 * If we haven't had a beacon before, tell the driver about the
2965 * DTIM period (and beacon timing if desired) now.
2966 */
2967 if (!ifmgd->have_beacon) {
2968 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2969 if (elems.tim)
2970 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2971 else
2972 bss_conf->dtim_period = 1;
2973
2974 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2975 sdata->vif.bss_conf.sync_tsf =
2976 le64_to_cpu(mgmt->u.beacon.timestamp);
2977 sdata->vif.bss_conf.sync_device_ts =
2978 rx_status->device_timestamp;
2979 if (elems.tim)
2980 sdata->vif.bss_conf.sync_dtim_count =
2981 elems.tim->dtim_count;
2982 else
2983 sdata->vif.bss_conf.sync_dtim_count = 0;
2984 }
2985
2986 changed |= BSS_CHANGED_BEACON_INFO;
2987 ifmgd->have_beacon = true;
2988
2989 mutex_lock(&local->iflist_mtx);
2990 ieee80211_recalc_ps(local, -1);
2991 mutex_unlock(&local->iflist_mtx);
2992
2993 ieee80211_recalc_ps_vif(sdata);
2994 }
2995
2996 if (elems.erp_info) {
2997 erp_valid = true;
2998 erp_value = elems.erp_info[0];
2999 } else {
3000 erp_valid = false;
3001 }
3002 changed |= ieee80211_handle_bss_capability(sdata,
3003 le16_to_cpu(mgmt->u.beacon.capab_info),
3004 erp_valid, erp_value);
3005
3006 mutex_lock(&local->sta_mtx);
3007 sta = sta_info_get(sdata, bssid);
3008
3009 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3010 elems.vht_operation, bssid, &changed)) {
3011 mutex_unlock(&local->sta_mtx);
3012 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3013 WLAN_REASON_DEAUTH_LEAVING,
3014 true, deauth_buf);
3015 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3016 sizeof(deauth_buf));
3017 return;
3018 }
3019
3020 if (sta && elems.opmode_notif)
3021 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3022 rx_status->band, true);
3023 mutex_unlock(&local->sta_mtx);
3024
3025 if (elems.country_elem && elems.pwr_constr_elem &&
3026 mgmt->u.probe_resp.capab_info &
3027 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3028 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3029 elems.country_elem,
3030 elems.country_elem_len,
3031 elems.pwr_constr_elem);
3032
3033 ieee80211_bss_info_change_notify(sdata, changed);
3034 }
3035
3036 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3037 struct sk_buff *skb)
3038 {
3039 struct ieee80211_rx_status *rx_status;
3040 struct ieee80211_mgmt *mgmt;
3041 u16 fc;
3042 struct ieee802_11_elems elems;
3043 int ies_len;
3044
3045 rx_status = (struct ieee80211_rx_status *) skb->cb;
3046 mgmt = (struct ieee80211_mgmt *) skb->data;
3047 fc = le16_to_cpu(mgmt->frame_control);
3048
3049 sdata_lock(sdata);
3050
3051 switch (fc & IEEE80211_FCTL_STYPE) {
3052 case IEEE80211_STYPE_BEACON:
3053 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3054 break;
3055 case IEEE80211_STYPE_PROBE_RESP:
3056 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3057 break;
3058 case IEEE80211_STYPE_AUTH:
3059 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3060 break;
3061 case IEEE80211_STYPE_DEAUTH:
3062 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3063 break;
3064 case IEEE80211_STYPE_DISASSOC:
3065 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3066 break;
3067 case IEEE80211_STYPE_ASSOC_RESP:
3068 case IEEE80211_STYPE_REASSOC_RESP:
3069 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3070 break;
3071 case IEEE80211_STYPE_ACTION:
3072 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3073 ies_len = skb->len -
3074 offsetof(struct ieee80211_mgmt,
3075 u.action.u.chan_switch.variable);
3076
3077 if (ies_len < 0)
3078 break;
3079
3080 ieee802_11_parse_elems(
3081 mgmt->u.action.u.chan_switch.variable,
3082 ies_len, true, &elems);
3083
3084 if (elems.parse_error)
3085 break;
3086
3087 ieee80211_sta_process_chanswitch(sdata,
3088 rx_status->mactime,
3089 &elems, false);
3090 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3091 ies_len = skb->len -
3092 offsetof(struct ieee80211_mgmt,
3093 u.action.u.ext_chan_switch.variable);
3094
3095 if (ies_len < 0)
3096 break;
3097
3098 ieee802_11_parse_elems(
3099 mgmt->u.action.u.ext_chan_switch.variable,
3100 ies_len, true, &elems);
3101
3102 if (elems.parse_error)
3103 break;
3104
3105 /* for the handling code pretend this was also an IE */
3106 elems.ext_chansw_ie =
3107 &mgmt->u.action.u.ext_chan_switch.data;
3108
3109 ieee80211_sta_process_chanswitch(sdata,
3110 rx_status->mactime,
3111 &elems, false);
3112 }
3113 break;
3114 }
3115 sdata_unlock(sdata);
3116 }
3117
3118 static void ieee80211_sta_timer(unsigned long data)
3119 {
3120 struct ieee80211_sub_if_data *sdata =
3121 (struct ieee80211_sub_if_data *) data;
3122
3123 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3124 }
3125
3126 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3127 u8 *bssid, u8 reason, bool tx)
3128 {
3129 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3130
3131 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3132 tx, frame_buf);
3133
3134 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3135 IEEE80211_DEAUTH_FRAME_LEN);
3136 }
3137
3138 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3139 {
3140 struct ieee80211_local *local = sdata->local;
3141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3142 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3143 u32 tx_flags = 0;
3144
3145 sdata_assert_lock(sdata);
3146
3147 if (WARN_ON_ONCE(!auth_data))
3148 return -EINVAL;
3149
3150 auth_data->tries++;
3151
3152 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3153 sdata_info(sdata, "authentication with %pM timed out\n",
3154 auth_data->bss->bssid);
3155
3156 /*
3157 * Most likely AP is not in the range so remove the
3158 * bss struct for that AP.
3159 */
3160 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3161
3162 return -ETIMEDOUT;
3163 }
3164
3165 drv_mgd_prepare_tx(local, sdata);
3166
3167 if (auth_data->bss->proberesp_ies) {
3168 u16 trans = 1;
3169 u16 status = 0;
3170
3171 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3172 auth_data->bss->bssid, auth_data->tries,
3173 IEEE80211_AUTH_MAX_TRIES);
3174
3175 auth_data->expected_transaction = 2;
3176
3177 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3178 trans = auth_data->sae_trans;
3179 status = auth_data->sae_status;
3180 auth_data->expected_transaction = trans;
3181 }
3182
3183 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3184 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3185 IEEE80211_TX_INTFL_MLME_CONN_TX;
3186
3187 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3188 auth_data->data, auth_data->data_len,
3189 auth_data->bss->bssid,
3190 auth_data->bss->bssid, NULL, 0, 0,
3191 tx_flags);
3192 } else {
3193 const u8 *ssidie;
3194
3195 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3196 auth_data->bss->bssid, auth_data->tries,
3197 IEEE80211_AUTH_MAX_TRIES);
3198
3199 rcu_read_lock();
3200 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3201 if (!ssidie) {
3202 rcu_read_unlock();
3203 return -EINVAL;
3204 }
3205 /*
3206 * Direct probe is sent to broadcast address as some APs
3207 * will not answer to direct packet in unassociated state.
3208 */
3209 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3210 NULL, 0, (u32) -1, true, 0,
3211 auth_data->bss->channel, false);
3212 rcu_read_unlock();
3213 }
3214
3215 if (tx_flags == 0) {
3216 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3217 auth_data->timeout_started = true;
3218 run_again(sdata, auth_data->timeout);
3219 } else {
3220 auth_data->timeout =
3221 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3222 auth_data->timeout_started = true;
3223 run_again(sdata, auth_data->timeout);
3224 }
3225
3226 return 0;
3227 }
3228
3229 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3230 {
3231 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3232 struct ieee80211_local *local = sdata->local;
3233
3234 sdata_assert_lock(sdata);
3235
3236 assoc_data->tries++;
3237 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3238 sdata_info(sdata, "association with %pM timed out\n",
3239 assoc_data->bss->bssid);
3240
3241 /*
3242 * Most likely AP is not in the range so remove the
3243 * bss struct for that AP.
3244 */
3245 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3246
3247 return -ETIMEDOUT;
3248 }
3249
3250 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3251 assoc_data->bss->bssid, assoc_data->tries,
3252 IEEE80211_ASSOC_MAX_TRIES);
3253 ieee80211_send_assoc(sdata);
3254
3255 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3256 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3257 assoc_data->timeout_started = true;
3258 run_again(sdata, assoc_data->timeout);
3259 } else {
3260 assoc_data->timeout =
3261 round_jiffies_up(jiffies +
3262 IEEE80211_ASSOC_TIMEOUT_LONG);
3263 assoc_data->timeout_started = true;
3264 run_again(sdata, assoc_data->timeout);
3265 }
3266
3267 return 0;
3268 }
3269
3270 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3271 __le16 fc, bool acked)
3272 {
3273 struct ieee80211_local *local = sdata->local;
3274
3275 sdata->u.mgd.status_fc = fc;
3276 sdata->u.mgd.status_acked = acked;
3277 sdata->u.mgd.status_received = true;
3278
3279 ieee80211_queue_work(&local->hw, &sdata->work);
3280 }
3281
3282 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3283 {
3284 struct ieee80211_local *local = sdata->local;
3285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3286
3287 sdata_lock(sdata);
3288
3289 if (ifmgd->status_received) {
3290 __le16 fc = ifmgd->status_fc;
3291 bool status_acked = ifmgd->status_acked;
3292
3293 ifmgd->status_received = false;
3294 if (ifmgd->auth_data &&
3295 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3296 if (status_acked) {
3297 ifmgd->auth_data->timeout =
3298 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3299 run_again(sdata, ifmgd->auth_data->timeout);
3300 } else {
3301 ifmgd->auth_data->timeout = jiffies - 1;
3302 }
3303 ifmgd->auth_data->timeout_started = true;
3304 } else if (ifmgd->assoc_data &&
3305 (ieee80211_is_assoc_req(fc) ||
3306 ieee80211_is_reassoc_req(fc))) {
3307 if (status_acked) {
3308 ifmgd->assoc_data->timeout =
3309 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3310 run_again(sdata, ifmgd->assoc_data->timeout);
3311 } else {
3312 ifmgd->assoc_data->timeout = jiffies - 1;
3313 }
3314 ifmgd->assoc_data->timeout_started = true;
3315 }
3316 }
3317
3318 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3319 time_after(jiffies, ifmgd->auth_data->timeout)) {
3320 if (ifmgd->auth_data->done) {
3321 /*
3322 * ok ... we waited for assoc but userspace didn't,
3323 * so let's just kill the auth data
3324 */
3325 ieee80211_destroy_auth_data(sdata, false);
3326 } else if (ieee80211_probe_auth(sdata)) {
3327 u8 bssid[ETH_ALEN];
3328
3329 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3330
3331 ieee80211_destroy_auth_data(sdata, false);
3332
3333 cfg80211_auth_timeout(sdata->dev, bssid);
3334 }
3335 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3336 run_again(sdata, ifmgd->auth_data->timeout);
3337
3338 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3339 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3340 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3341 ieee80211_do_assoc(sdata)) {
3342 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3343
3344 ieee80211_destroy_assoc_data(sdata, false);
3345 cfg80211_assoc_timeout(sdata->dev, bss);
3346 }
3347 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3348 run_again(sdata, ifmgd->assoc_data->timeout);
3349
3350 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3351 ifmgd->associated) {
3352 u8 bssid[ETH_ALEN];
3353 int max_tries;
3354
3355 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3356
3357 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3358 max_tries = max_nullfunc_tries;
3359 else
3360 max_tries = max_probe_tries;
3361
3362 /* ACK received for nullfunc probing frame */
3363 if (!ifmgd->probe_send_count)
3364 ieee80211_reset_ap_probe(sdata);
3365 else if (ifmgd->nullfunc_failed) {
3366 if (ifmgd->probe_send_count < max_tries) {
3367 mlme_dbg(sdata,
3368 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3369 bssid, ifmgd->probe_send_count,
3370 max_tries);
3371 ieee80211_mgd_probe_ap_send(sdata);
3372 } else {
3373 mlme_dbg(sdata,
3374 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3375 bssid);
3376 ieee80211_sta_connection_lost(sdata, bssid,
3377 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3378 false);
3379 }
3380 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3381 run_again(sdata, ifmgd->probe_timeout);
3382 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3383 mlme_dbg(sdata,
3384 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3385 bssid, probe_wait_ms);
3386 ieee80211_sta_connection_lost(sdata, bssid,
3387 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3388 } else if (ifmgd->probe_send_count < max_tries) {
3389 mlme_dbg(sdata,
3390 "No probe response from AP %pM after %dms, try %d/%i\n",
3391 bssid, probe_wait_ms,
3392 ifmgd->probe_send_count, max_tries);
3393 ieee80211_mgd_probe_ap_send(sdata);
3394 } else {
3395 /*
3396 * We actually lost the connection ... or did we?
3397 * Let's make sure!
3398 */
3399 wiphy_debug(local->hw.wiphy,
3400 "%s: No probe response from AP %pM"
3401 " after %dms, disconnecting.\n",
3402 sdata->name,
3403 bssid, probe_wait_ms);
3404
3405 ieee80211_sta_connection_lost(sdata, bssid,
3406 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3407 }
3408 }
3409
3410 sdata_unlock(sdata);
3411 }
3412
3413 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3414 {
3415 struct ieee80211_sub_if_data *sdata =
3416 (struct ieee80211_sub_if_data *) data;
3417 struct ieee80211_local *local = sdata->local;
3418
3419 if (local->quiescing)
3420 return;
3421
3422 sdata->u.mgd.connection_loss = false;
3423 ieee80211_queue_work(&sdata->local->hw,
3424 &sdata->u.mgd.beacon_connection_loss_work);
3425 }
3426
3427 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3428 {
3429 struct ieee80211_sub_if_data *sdata =
3430 (struct ieee80211_sub_if_data *) data;
3431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3432 struct ieee80211_local *local = sdata->local;
3433
3434 if (local->quiescing)
3435 return;
3436
3437 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3438 }
3439
3440 static void ieee80211_sta_monitor_work(struct work_struct *work)
3441 {
3442 struct ieee80211_sub_if_data *sdata =
3443 container_of(work, struct ieee80211_sub_if_data,
3444 u.mgd.monitor_work);
3445
3446 ieee80211_mgd_probe_ap(sdata, false);
3447 }
3448
3449 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3450 {
3451 u32 flags;
3452
3453 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3454 __ieee80211_stop_poll(sdata);
3455
3456 /* let's probe the connection once */
3457 flags = sdata->local->hw.flags;
3458 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3459 ieee80211_queue_work(&sdata->local->hw,
3460 &sdata->u.mgd.monitor_work);
3461 /* and do all the other regular work too */
3462 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3463 }
3464 }
3465
3466 #ifdef CONFIG_PM
3467 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3468 {
3469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3470
3471 sdata_lock(sdata);
3472 if (!ifmgd->associated) {
3473 sdata_unlock(sdata);
3474 return;
3475 }
3476
3477 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3478 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3479 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3480 ieee80211_sta_connection_lost(sdata,
3481 ifmgd->associated->bssid,
3482 WLAN_REASON_UNSPECIFIED,
3483 true);
3484 sdata_unlock(sdata);
3485 return;
3486 }
3487 sdata_unlock(sdata);
3488 }
3489 #endif
3490
3491 /* interface setup */
3492 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3493 {
3494 struct ieee80211_if_managed *ifmgd;
3495
3496 ifmgd = &sdata->u.mgd;
3497 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3498 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3499 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3500 ieee80211_beacon_connection_loss_work);
3501 INIT_WORK(&ifmgd->csa_connection_drop_work,
3502 ieee80211_csa_connection_drop_work);
3503 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3504 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3505 (unsigned long) sdata);
3506 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3507 (unsigned long) sdata);
3508 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3509 (unsigned long) sdata);
3510 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3511 (unsigned long) sdata);
3512
3513 ifmgd->flags = 0;
3514 ifmgd->powersave = sdata->wdev.ps;
3515 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3516 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3517 ifmgd->p2p_noa_index = -1;
3518
3519 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3520 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3521 else
3522 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3523 }
3524
3525 /* scan finished notification */
3526 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3527 {
3528 struct ieee80211_sub_if_data *sdata;
3529
3530 /* Restart STA timers */
3531 rcu_read_lock();
3532 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3533 if (ieee80211_sdata_running(sdata))
3534 ieee80211_restart_sta_timer(sdata);
3535 }
3536 rcu_read_unlock();
3537 }
3538
3539 int ieee80211_max_network_latency(struct notifier_block *nb,
3540 unsigned long data, void *dummy)
3541 {
3542 s32 latency_usec = (s32) data;
3543 struct ieee80211_local *local =
3544 container_of(nb, struct ieee80211_local,
3545 network_latency_notifier);
3546
3547 mutex_lock(&local->iflist_mtx);
3548 ieee80211_recalc_ps(local, latency_usec);
3549 mutex_unlock(&local->iflist_mtx);
3550
3551 return 0;
3552 }
3553
3554 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3555 struct cfg80211_bss *cbss)
3556 {
3557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3558 const u8 *ht_cap_ie, *vht_cap_ie;
3559 const struct ieee80211_ht_cap *ht_cap;
3560 const struct ieee80211_vht_cap *vht_cap;
3561 u8 chains = 1;
3562
3563 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3564 return chains;
3565
3566 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3567 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3568 ht_cap = (void *)(ht_cap_ie + 2);
3569 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3570 /*
3571 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3572 * "Tx Unequal Modulation Supported" fields.
3573 */
3574 }
3575
3576 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3577 return chains;
3578
3579 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3580 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3581 u8 nss;
3582 u16 tx_mcs_map;
3583
3584 vht_cap = (void *)(vht_cap_ie + 2);
3585 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3586 for (nss = 8; nss > 0; nss--) {
3587 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3588 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3589 break;
3590 }
3591 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3592 chains = max(chains, nss);
3593 }
3594
3595 return chains;
3596 }
3597
3598 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3599 struct cfg80211_bss *cbss)
3600 {
3601 struct ieee80211_local *local = sdata->local;
3602 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3603 const struct ieee80211_ht_operation *ht_oper = NULL;
3604 const struct ieee80211_vht_operation *vht_oper = NULL;
3605 struct ieee80211_supported_band *sband;
3606 struct cfg80211_chan_def chandef;
3607 int ret;
3608
3609 sband = local->hw.wiphy->bands[cbss->channel->band];
3610
3611 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3612 IEEE80211_STA_DISABLE_80P80MHZ |
3613 IEEE80211_STA_DISABLE_160MHZ);
3614
3615 rcu_read_lock();
3616
3617 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3618 sband->ht_cap.ht_supported) {
3619 const u8 *ht_oper_ie, *ht_cap;
3620
3621 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3622 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3623 ht_oper = (void *)(ht_oper_ie + 2);
3624
3625 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3626 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3627 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3628 ht_oper = NULL;
3629 }
3630 }
3631
3632 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3633 sband->vht_cap.vht_supported) {
3634 const u8 *vht_oper_ie, *vht_cap;
3635
3636 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3637 WLAN_EID_VHT_OPERATION);
3638 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3639 vht_oper = (void *)(vht_oper_ie + 2);
3640 if (vht_oper && !ht_oper) {
3641 vht_oper = NULL;
3642 sdata_info(sdata,
3643 "AP advertised VHT without HT, disabling both\n");
3644 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3645 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3646 }
3647
3648 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3649 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3650 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3651 vht_oper = NULL;
3652 }
3653 }
3654
3655 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3656 cbss->channel,
3657 ht_oper, vht_oper,
3658 &chandef, false);
3659
3660 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3661 local->rx_chains);
3662
3663 rcu_read_unlock();
3664
3665 /* will change later if needed */
3666 sdata->smps_mode = IEEE80211_SMPS_OFF;
3667
3668 /*
3669 * If this fails (possibly due to channel context sharing
3670 * on incompatible channels, e.g. 80+80 and 160 sharing the
3671 * same control channel) try to use a smaller bandwidth.
3672 */
3673 ret = ieee80211_vif_use_channel(sdata, &chandef,
3674 IEEE80211_CHANCTX_SHARED);
3675
3676 /* don't downgrade for 5 and 10 MHz channels, though. */
3677 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3678 chandef.width == NL80211_CHAN_WIDTH_10)
3679 return ret;
3680
3681 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3682 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3683 ret = ieee80211_vif_use_channel(sdata, &chandef,
3684 IEEE80211_CHANCTX_SHARED);
3685 }
3686 return ret;
3687 }
3688
3689 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3690 struct cfg80211_bss *cbss, bool assoc)
3691 {
3692 struct ieee80211_local *local = sdata->local;
3693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3694 struct ieee80211_bss *bss = (void *)cbss->priv;
3695 struct sta_info *new_sta = NULL;
3696 bool have_sta = false;
3697 int err;
3698
3699 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3700 return -EINVAL;
3701
3702 if (assoc) {
3703 rcu_read_lock();
3704 have_sta = sta_info_get(sdata, cbss->bssid);
3705 rcu_read_unlock();
3706 }
3707
3708 if (!have_sta) {
3709 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3710 if (!new_sta)
3711 return -ENOMEM;
3712 }
3713 if (new_sta) {
3714 u32 rates = 0, basic_rates = 0;
3715 bool have_higher_than_11mbit;
3716 int min_rate = INT_MAX, min_rate_index = -1;
3717 struct ieee80211_chanctx_conf *chanctx_conf;
3718 struct ieee80211_supported_band *sband;
3719 const struct cfg80211_bss_ies *ies;
3720 int shift;
3721 u32 rate_flags;
3722
3723 sband = local->hw.wiphy->bands[cbss->channel->band];
3724
3725 err = ieee80211_prep_channel(sdata, cbss);
3726 if (err) {
3727 sta_info_free(local, new_sta);
3728 return -EINVAL;
3729 }
3730 shift = ieee80211_vif_get_shift(&sdata->vif);
3731
3732 rcu_read_lock();
3733 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3734 if (WARN_ON(!chanctx_conf)) {
3735 rcu_read_unlock();
3736 return -EINVAL;
3737 }
3738 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3739 rcu_read_unlock();
3740
3741 ieee80211_get_rates(sband, bss->supp_rates,
3742 bss->supp_rates_len,
3743 &rates, &basic_rates,
3744 &have_higher_than_11mbit,
3745 &min_rate, &min_rate_index,
3746 shift, rate_flags);
3747
3748 /*
3749 * This used to be a workaround for basic rates missing
3750 * in the association response frame. Now that we no
3751 * longer use the basic rates from there, it probably
3752 * doesn't happen any more, but keep the workaround so
3753 * in case some *other* APs are buggy in different ways
3754 * we can connect -- with a warning.
3755 */
3756 if (!basic_rates && min_rate_index >= 0) {
3757 sdata_info(sdata,
3758 "No basic rates, using min rate instead\n");
3759 basic_rates = BIT(min_rate_index);
3760 }
3761
3762 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3763 sdata->vif.bss_conf.basic_rates = basic_rates;
3764
3765 /* cf. IEEE 802.11 9.2.12 */
3766 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3767 have_higher_than_11mbit)
3768 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3769 else
3770 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3771
3772 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3773
3774 /* set timing information */
3775 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3776 rcu_read_lock();
3777 ies = rcu_dereference(cbss->beacon_ies);
3778 if (ies) {
3779 const u8 *tim_ie;
3780
3781 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3782 sdata->vif.bss_conf.sync_device_ts =
3783 bss->device_ts_beacon;
3784 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3785 ies->data, ies->len);
3786 if (tim_ie && tim_ie[1] >= 2)
3787 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3788 else
3789 sdata->vif.bss_conf.sync_dtim_count = 0;
3790 } else if (!(local->hw.flags &
3791 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3792 ies = rcu_dereference(cbss->proberesp_ies);
3793 /* must be non-NULL since beacon IEs were NULL */
3794 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3795 sdata->vif.bss_conf.sync_device_ts =
3796 bss->device_ts_presp;
3797 sdata->vif.bss_conf.sync_dtim_count = 0;
3798 } else {
3799 sdata->vif.bss_conf.sync_tsf = 0;
3800 sdata->vif.bss_conf.sync_device_ts = 0;
3801 sdata->vif.bss_conf.sync_dtim_count = 0;
3802 }
3803 rcu_read_unlock();
3804
3805 /* tell driver about BSSID, basic rates and timing */
3806 ieee80211_bss_info_change_notify(sdata,
3807 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3808 BSS_CHANGED_BEACON_INT);
3809
3810 if (assoc)
3811 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3812
3813 err = sta_info_insert(new_sta);
3814 new_sta = NULL;
3815 if (err) {
3816 sdata_info(sdata,
3817 "failed to insert STA entry for the AP (error %d)\n",
3818 err);
3819 return err;
3820 }
3821 } else
3822 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3823
3824 return 0;
3825 }
3826
3827 /* config hooks */
3828 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3829 struct cfg80211_auth_request *req)
3830 {
3831 struct ieee80211_local *local = sdata->local;
3832 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3833 struct ieee80211_mgd_auth_data *auth_data;
3834 u16 auth_alg;
3835 int err;
3836
3837 /* prepare auth data structure */
3838
3839 switch (req->auth_type) {
3840 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3841 auth_alg = WLAN_AUTH_OPEN;
3842 break;
3843 case NL80211_AUTHTYPE_SHARED_KEY:
3844 if (IS_ERR(local->wep_tx_tfm))
3845 return -EOPNOTSUPP;
3846 auth_alg = WLAN_AUTH_SHARED_KEY;
3847 break;
3848 case NL80211_AUTHTYPE_FT:
3849 auth_alg = WLAN_AUTH_FT;
3850 break;
3851 case NL80211_AUTHTYPE_NETWORK_EAP:
3852 auth_alg = WLAN_AUTH_LEAP;
3853 break;
3854 case NL80211_AUTHTYPE_SAE:
3855 auth_alg = WLAN_AUTH_SAE;
3856 break;
3857 default:
3858 return -EOPNOTSUPP;
3859 }
3860
3861 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3862 req->ie_len, GFP_KERNEL);
3863 if (!auth_data)
3864 return -ENOMEM;
3865
3866 auth_data->bss = req->bss;
3867
3868 if (req->sae_data_len >= 4) {
3869 __le16 *pos = (__le16 *) req->sae_data;
3870 auth_data->sae_trans = le16_to_cpu(pos[0]);
3871 auth_data->sae_status = le16_to_cpu(pos[1]);
3872 memcpy(auth_data->data, req->sae_data + 4,
3873 req->sae_data_len - 4);
3874 auth_data->data_len += req->sae_data_len - 4;
3875 }
3876
3877 if (req->ie && req->ie_len) {
3878 memcpy(&auth_data->data[auth_data->data_len],
3879 req->ie, req->ie_len);
3880 auth_data->data_len += req->ie_len;
3881 }
3882
3883 if (req->key && req->key_len) {
3884 auth_data->key_len = req->key_len;
3885 auth_data->key_idx = req->key_idx;
3886 memcpy(auth_data->key, req->key, req->key_len);
3887 }
3888
3889 auth_data->algorithm = auth_alg;
3890
3891 /* try to authenticate/probe */
3892
3893 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3894 ifmgd->assoc_data) {
3895 err = -EBUSY;
3896 goto err_free;
3897 }
3898
3899 if (ifmgd->auth_data)
3900 ieee80211_destroy_auth_data(sdata, false);
3901
3902 /* prep auth_data so we don't go into idle on disassoc */
3903 ifmgd->auth_data = auth_data;
3904
3905 if (ifmgd->associated) {
3906 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3907
3908 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3909 WLAN_REASON_UNSPECIFIED,
3910 false, frame_buf);
3911
3912 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3913 sizeof(frame_buf));
3914 }
3915
3916 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3917
3918 err = ieee80211_prep_connection(sdata, req->bss, false);
3919 if (err)
3920 goto err_clear;
3921
3922 err = ieee80211_probe_auth(sdata);
3923 if (err) {
3924 sta_info_destroy_addr(sdata, req->bss->bssid);
3925 goto err_clear;
3926 }
3927
3928 /* hold our own reference */
3929 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
3930 return 0;
3931
3932 err_clear:
3933 memset(ifmgd->bssid, 0, ETH_ALEN);
3934 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3935 ifmgd->auth_data = NULL;
3936 err_free:
3937 kfree(auth_data);
3938 return err;
3939 }
3940
3941 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
3942 const u8 *wmm_param, int len)
3943 {
3944 const u8 *pos;
3945 size_t left;
3946
3947 if (len < 8)
3948 return false;
3949
3950 if (wmm_param[5] != 1 /* version */)
3951 return false;
3952
3953 pos = wmm_param + 8;
3954 left = len - 8;
3955
3956 for (; left >= 4; left -= 4, pos += 4) {
3957 u8 aifsn = pos[0] & 0x0f;
3958 u8 ecwmin = pos[1] & 0x0f;
3959 u8 ecwmax = (pos[1] & 0xf0) >> 4;
3960 int aci = (pos[0] >> 5) & 0x03;
3961
3962 if (aifsn < 2) {
3963 sdata_info(sdata,
3964 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
3965 aifsn, aci);
3966 return false;
3967 }
3968 if (ecwmin > ecwmax) {
3969 sdata_info(sdata,
3970 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
3971 ecwmin, ecwmax, aci);
3972 return false;
3973 }
3974 }
3975
3976 return true;
3977 }
3978
3979 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3980 struct cfg80211_assoc_request *req)
3981 {
3982 struct ieee80211_local *local = sdata->local;
3983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3984 struct ieee80211_bss *bss = (void *)req->bss->priv;
3985 struct ieee80211_mgd_assoc_data *assoc_data;
3986 const struct cfg80211_bss_ies *beacon_ies;
3987 struct ieee80211_supported_band *sband;
3988 const u8 *ssidie, *ht_ie, *vht_ie;
3989 int i, err;
3990
3991 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3992 if (!assoc_data)
3993 return -ENOMEM;
3994
3995 rcu_read_lock();
3996 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3997 if (!ssidie) {
3998 rcu_read_unlock();
3999 kfree(assoc_data);
4000 return -EINVAL;
4001 }
4002 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4003 assoc_data->ssid_len = ssidie[1];
4004 rcu_read_unlock();
4005
4006 if (ifmgd->associated) {
4007 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4008
4009 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4010 WLAN_REASON_UNSPECIFIED,
4011 false, frame_buf);
4012
4013 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4014 sizeof(frame_buf));
4015 }
4016
4017 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4018 err = -EBUSY;
4019 goto err_free;
4020 }
4021
4022 if (ifmgd->assoc_data) {
4023 err = -EBUSY;
4024 goto err_free;
4025 }
4026
4027 if (ifmgd->auth_data) {
4028 bool match;
4029
4030 /* keep sta info, bssid if matching */
4031 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4032 ieee80211_destroy_auth_data(sdata, match);
4033 }
4034
4035 /* prepare assoc data */
4036
4037 ifmgd->beacon_crc_valid = false;
4038
4039 assoc_data->wmm = bss->wmm_used &&
4040 (local->hw.queues >= IEEE80211_NUM_ACS);
4041 if (assoc_data->wmm) {
4042 /* try to check validity of WMM params IE */
4043 const struct cfg80211_bss_ies *ies;
4044 const u8 *wp, *start, *end;
4045
4046 rcu_read_lock();
4047 ies = rcu_dereference(req->bss->ies);
4048 start = ies->data;
4049 end = start + ies->len;
4050
4051 while (true) {
4052 wp = cfg80211_find_vendor_ie(
4053 WLAN_OUI_MICROSOFT,
4054 WLAN_OUI_TYPE_MICROSOFT_WMM,
4055 start, end - start);
4056 if (!wp)
4057 break;
4058 start = wp + wp[1] + 2;
4059 /* if this IE is too short, try the next */
4060 if (wp[1] <= 4)
4061 continue;
4062 /* if this IE is WMM params, we found what we wanted */
4063 if (wp[6] == 1)
4064 break;
4065 }
4066
4067 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4068 wp[1] - 2)) {
4069 assoc_data->wmm = false;
4070 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4071 }
4072 rcu_read_unlock();
4073 }
4074
4075 /*
4076 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4077 * We still associate in non-HT mode (11a/b/g) if any one of these
4078 * ciphers is configured as pairwise.
4079 * We can set this to true for non-11n hardware, that'll be checked
4080 * separately along with the peer capabilities.
4081 */
4082 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4083 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4084 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4085 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4086 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4087 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4088 netdev_info(sdata->dev,
4089 "disabling HT/VHT due to WEP/TKIP use\n");
4090 }
4091 }
4092
4093 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4094 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4095 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4096 }
4097
4098 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4099 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4100
4101 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4102 sband = local->hw.wiphy->bands[req->bss->channel->band];
4103 if (!sband->ht_cap.ht_supported ||
4104 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4105 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4106 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4107 if (!bss->wmm_used &&
4108 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4109 netdev_info(sdata->dev,
4110 "disabling HT as WMM/QoS is not supported by the AP\n");
4111 }
4112
4113 /* disable VHT if we don't support it or the AP doesn't use WMM */
4114 if (!sband->vht_cap.vht_supported ||
4115 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4116 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4117 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4118 if (!bss->wmm_used &&
4119 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4120 netdev_info(sdata->dev,
4121 "disabling VHT as WMM/QoS is not supported by the AP\n");
4122 }
4123
4124 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4125 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4126 sizeof(ifmgd->ht_capa_mask));
4127
4128 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4129 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4130 sizeof(ifmgd->vht_capa_mask));
4131
4132 if (req->ie && req->ie_len) {
4133 memcpy(assoc_data->ie, req->ie, req->ie_len);
4134 assoc_data->ie_len = req->ie_len;
4135 }
4136
4137 assoc_data->bss = req->bss;
4138
4139 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4140 if (ifmgd->powersave)
4141 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4142 else
4143 sdata->smps_mode = IEEE80211_SMPS_OFF;
4144 } else
4145 sdata->smps_mode = ifmgd->req_smps;
4146
4147 assoc_data->capability = req->bss->capability;
4148 assoc_data->supp_rates = bss->supp_rates;
4149 assoc_data->supp_rates_len = bss->supp_rates_len;
4150
4151 rcu_read_lock();
4152 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4153 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4154 assoc_data->ap_ht_param =
4155 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4156 else
4157 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4158 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4159 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4160 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4161 sizeof(struct ieee80211_vht_cap));
4162 else
4163 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4164 rcu_read_unlock();
4165
4166 if (bss->wmm_used && bss->uapsd_supported &&
4167 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4168 sdata->wmm_acm != 0xff) {
4169 assoc_data->uapsd = true;
4170 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4171 } else {
4172 assoc_data->uapsd = false;
4173 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4174 }
4175
4176 if (req->prev_bssid)
4177 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4178
4179 if (req->use_mfp) {
4180 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4181 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4182 } else {
4183 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4184 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4185 }
4186
4187 if (req->crypto.control_port)
4188 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4189 else
4190 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4191
4192 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4193 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4194
4195 /* kick off associate process */
4196
4197 ifmgd->assoc_data = assoc_data;
4198 ifmgd->dtim_period = 0;
4199 ifmgd->have_beacon = false;
4200
4201 err = ieee80211_prep_connection(sdata, req->bss, true);
4202 if (err)
4203 goto err_clear;
4204
4205 rcu_read_lock();
4206 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4207
4208 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4209 !beacon_ies) {
4210 /*
4211 * Wait up to one beacon interval ...
4212 * should this be more if we miss one?
4213 */
4214 sdata_info(sdata, "waiting for beacon from %pM\n",
4215 ifmgd->bssid);
4216 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4217 assoc_data->timeout_started = true;
4218 assoc_data->need_beacon = true;
4219 } else if (beacon_ies) {
4220 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4221 beacon_ies->data,
4222 beacon_ies->len);
4223 u8 dtim_count = 0;
4224
4225 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4226 const struct ieee80211_tim_ie *tim;
4227 tim = (void *)(tim_ie + 2);
4228 ifmgd->dtim_period = tim->dtim_period;
4229 dtim_count = tim->dtim_count;
4230 }
4231 ifmgd->have_beacon = true;
4232 assoc_data->timeout = jiffies;
4233 assoc_data->timeout_started = true;
4234
4235 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4236 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4237 sdata->vif.bss_conf.sync_device_ts =
4238 bss->device_ts_beacon;
4239 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4240 }
4241 } else {
4242 assoc_data->timeout = jiffies;
4243 assoc_data->timeout_started = true;
4244 }
4245 rcu_read_unlock();
4246
4247 run_again(sdata, assoc_data->timeout);
4248
4249 if (bss->corrupt_data) {
4250 char *corrupt_type = "data";
4251 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4252 if (bss->corrupt_data &
4253 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4254 corrupt_type = "beacon and probe response";
4255 else
4256 corrupt_type = "beacon";
4257 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4258 corrupt_type = "probe response";
4259 sdata_info(sdata, "associating with AP with corrupt %s\n",
4260 corrupt_type);
4261 }
4262
4263 return 0;
4264 err_clear:
4265 memset(ifmgd->bssid, 0, ETH_ALEN);
4266 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4267 ifmgd->assoc_data = NULL;
4268 err_free:
4269 kfree(assoc_data);
4270 return err;
4271 }
4272
4273 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4274 struct cfg80211_deauth_request *req)
4275 {
4276 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4277 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4278 bool tx = !req->local_state_change;
4279 bool report_frame = false;
4280
4281 sdata_info(sdata,
4282 "deauthenticating from %pM by local choice (reason=%d)\n",
4283 req->bssid, req->reason_code);
4284
4285 if (ifmgd->auth_data) {
4286 drv_mgd_prepare_tx(sdata->local, sdata);
4287 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4288 IEEE80211_STYPE_DEAUTH,
4289 req->reason_code, tx,
4290 frame_buf);
4291 ieee80211_destroy_auth_data(sdata, false);
4292
4293 report_frame = true;
4294 goto out;
4295 }
4296
4297 if (ifmgd->associated &&
4298 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4299 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4300 req->reason_code, tx, frame_buf);
4301 report_frame = true;
4302 }
4303
4304 out:
4305 if (report_frame)
4306 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4307 IEEE80211_DEAUTH_FRAME_LEN);
4308
4309 return 0;
4310 }
4311
4312 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4313 struct cfg80211_disassoc_request *req)
4314 {
4315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4316 u8 bssid[ETH_ALEN];
4317 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4318
4319 /*
4320 * cfg80211 should catch this ... but it's racy since
4321 * we can receive a disassoc frame, process it, hand it
4322 * to cfg80211 while that's in a locked section already
4323 * trying to tell us that the user wants to disconnect.
4324 */
4325 if (ifmgd->associated != req->bss)
4326 return -ENOLINK;
4327
4328 sdata_info(sdata,
4329 "disassociating from %pM by local choice (reason=%d)\n",
4330 req->bss->bssid, req->reason_code);
4331
4332 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4333 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4334 req->reason_code, !req->local_state_change,
4335 frame_buf);
4336
4337 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4338 IEEE80211_DEAUTH_FRAME_LEN);
4339
4340 return 0;
4341 }
4342
4343 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4344 {
4345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4346
4347 /*
4348 * Make sure some work items will not run after this,
4349 * they will not do anything but might not have been
4350 * cancelled when disconnecting.
4351 */
4352 cancel_work_sync(&ifmgd->monitor_work);
4353 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4354 cancel_work_sync(&ifmgd->request_smps_work);
4355 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4356 cancel_work_sync(&ifmgd->chswitch_work);
4357
4358 sdata_lock(sdata);
4359 if (ifmgd->assoc_data) {
4360 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4361 ieee80211_destroy_assoc_data(sdata, false);
4362 cfg80211_assoc_timeout(sdata->dev, bss);
4363 }
4364 if (ifmgd->auth_data)
4365 ieee80211_destroy_auth_data(sdata, false);
4366 del_timer_sync(&ifmgd->timer);
4367 sdata_unlock(sdata);
4368 }
4369
4370 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4371 enum nl80211_cqm_rssi_threshold_event rssi_event,
4372 gfp_t gfp)
4373 {
4374 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4375
4376 trace_api_cqm_rssi_notify(sdata, rssi_event);
4377
4378 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4379 }
4380 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux with added FPC-III support