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Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
[linux/fpc-iii.git] / net / mac80211 / mlme.c
bloba3552929a21d68f469696c4131ffb6296becd5df
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_MAX_TRIES 3
35 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37 #define IEEE80211_ASSOC_MAX_TRIES 3
38
39 static int max_nullfunc_tries = 2;
40 module_param(max_nullfunc_tries, int, 0644);
41 MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44 static int max_probe_tries = 5;
45 module_param(max_probe_tries, int, 0644);
46 MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
48
49 /*
50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
56 */
57 #define IEEE80211_BEACON_LOSS_COUNT 7
58
59 /*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
63 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
64 /*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
69 static int probe_wait_ms = 500;
70 module_param(probe_wait_ms, int, 0644);
71 MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
74
75 /*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
82 /*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
88 #define TMR_RUNNING_TIMER 0
89 #define TMR_RUNNING_CHANSW 1
90
91 /*
92 * All cfg80211 functions have to be called outside a locked
93 * section so that they can acquire a lock themselves... This
94 * is much simpler than queuing up things in cfg80211, but we
95 * do need some indirection for that here.
96 */
97 enum rx_mgmt_action {
98 /* no action required */
99 RX_MGMT_NONE,
100
101 /* caller must call cfg80211_send_deauth() */
102 RX_MGMT_CFG80211_DEAUTH,
103
104 /* caller must call cfg80211_send_disassoc() */
105 RX_MGMT_CFG80211_DISASSOC,
106
107 /* caller must call cfg80211_send_rx_auth() */
108 RX_MGMT_CFG80211_RX_AUTH,
109
110 /* caller must call cfg80211_send_rx_assoc() */
111 RX_MGMT_CFG80211_RX_ASSOC,
112
113 /* caller must call cfg80211_send_assoc_timeout() */
114 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
115 };
116
117 /* utils */
118 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
119 {
120 lockdep_assert_held(&ifmgd->mtx);
121 }
122
123 /*
124 * We can have multiple work items (and connection probing)
125 * scheduling this timer, but we need to take care to only
126 * reschedule it when it should fire _earlier_ than it was
127 * asked for before, or if it's not pending right now. This
128 * function ensures that. Note that it then is required to
129 * run this function for all timeouts after the first one
130 * has happened -- the work that runs from this timer will
131 * do that.
132 */
133 static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
134 {
135 ASSERT_MGD_MTX(ifmgd);
136
137 if (!timer_pending(&ifmgd->timer) ||
138 time_before(timeout, ifmgd->timer.expires))
139 mod_timer(&ifmgd->timer, timeout);
140 }
141
142 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
143 {
144 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
145 return;
146
147 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
148 return;
149
150 mod_timer(&sdata->u.mgd.bcn_mon_timer,
151 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
152 }
153
154 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
155 {
156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157
158 if (unlikely(!sdata->u.mgd.associated))
159 return;
160
161 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
162 return;
163
164 mod_timer(&sdata->u.mgd.conn_mon_timer,
165 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
166
167 ifmgd->probe_send_count = 0;
168 }
169
170 static int ecw2cw(int ecw)
171 {
172 return (1 << ecw) - 1;
173 }
174
175 static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
176 struct ieee80211_ht_operation *ht_oper,
177 const u8 *bssid, bool reconfig)
178 {
179 struct ieee80211_local *local = sdata->local;
180 struct ieee80211_supported_band *sband;
181 struct ieee80211_chanctx_conf *chanctx_conf;
182 struct ieee80211_channel *chan;
183 struct sta_info *sta;
184 u32 changed = 0;
185 u16 ht_opmode;
186 bool disable_40 = false;
187
188 rcu_read_lock();
189 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
190 if (WARN_ON(!chanctx_conf)) {
191 rcu_read_unlock();
192 return 0;
193 }
194 chan = chanctx_conf->def.chan;
195 rcu_read_unlock();
196 sband = local->hw.wiphy->bands[chan->band];
197
198 switch (sdata->vif.bss_conf.chandef.width) {
199 case NL80211_CHAN_WIDTH_40:
200 if (sdata->vif.bss_conf.chandef.chan->center_freq >
201 sdata->vif.bss_conf.chandef.center_freq1 &&
202 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
203 disable_40 = true;
204 if (sdata->vif.bss_conf.chandef.chan->center_freq <
205 sdata->vif.bss_conf.chandef.center_freq1 &&
206 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
207 disable_40 = true;
208 break;
209 default:
210 break;
211 }
212
213 /* This can change during the lifetime of the BSS */
214 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
215 disable_40 = true;
216
217 mutex_lock(&local->sta_mtx);
218 sta = sta_info_get(sdata, bssid);
219
220 WARN_ON_ONCE(!sta);
221
222 if (sta && !sta->supports_40mhz)
223 disable_40 = true;
224
225 if (sta && (!reconfig ||
226 (disable_40 != !(sta->sta.ht_cap.cap &
227 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
228
229 if (disable_40)
230 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
231 else
232 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
233
234 rate_control_rate_update(local, sband, sta,
235 IEEE80211_RC_BW_CHANGED);
236 }
237 mutex_unlock(&local->sta_mtx);
238
239 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
240
241 /* if bss configuration changed store the new one */
242 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
243 changed |= BSS_CHANGED_HT;
244 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
245 }
246
247 return changed;
248 }
249
250 /* frame sending functions */
251
252 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
253 struct ieee80211_supported_band *sband,
254 u32 *rates)
255 {
256 int i, j, count;
257 *rates = 0;
258 count = 0;
259 for (i = 0; i < supp_rates_len; i++) {
260 int rate = (supp_rates[i] & 0x7F) * 5;
261
262 for (j = 0; j < sband->n_bitrates; j++)
263 if (sband->bitrates[j].bitrate == rate) {
264 *rates |= BIT(j);
265 count++;
266 break;
267 }
268 }
269
270 return count;
271 }
272
273 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
274 struct sk_buff *skb, u8 ap_ht_param,
275 struct ieee80211_supported_band *sband,
276 struct ieee80211_channel *channel,
277 enum ieee80211_smps_mode smps)
278 {
279 u8 *pos;
280 u32 flags = channel->flags;
281 u16 cap;
282 struct ieee80211_sta_ht_cap ht_cap;
283
284 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
285
286 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
287 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
288
289 /* determine capability flags */
290 cap = ht_cap.cap;
291
292 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
293 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
294 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
295 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
296 cap &= ~IEEE80211_HT_CAP_SGI_40;
297 }
298 break;
299 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
300 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
301 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
302 cap &= ~IEEE80211_HT_CAP_SGI_40;
303 }
304 break;
305 }
306
307 /*
308 * If 40 MHz was disabled associate as though we weren't
309 * capable of 40 MHz -- some broken APs will never fall
310 * back to trying to transmit in 20 MHz.
311 */
312 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
313 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
314 cap &= ~IEEE80211_HT_CAP_SGI_40;
315 }
316
317 /* set SM PS mode properly */
318 cap &= ~IEEE80211_HT_CAP_SM_PS;
319 switch (smps) {
320 case IEEE80211_SMPS_AUTOMATIC:
321 case IEEE80211_SMPS_NUM_MODES:
322 WARN_ON(1);
323 case IEEE80211_SMPS_OFF:
324 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
326 break;
327 case IEEE80211_SMPS_STATIC:
328 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
330 break;
331 case IEEE80211_SMPS_DYNAMIC:
332 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
333 IEEE80211_HT_CAP_SM_PS_SHIFT;
334 break;
335 }
336
337 /* reserve and fill IE */
338 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
339 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
340 }
341
342 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
343 struct sk_buff *skb,
344 struct ieee80211_supported_band *sband)
345 {
346 u8 *pos;
347 u32 cap;
348 struct ieee80211_sta_vht_cap vht_cap;
349
350 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
351
352 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
353
354 /* determine capability flags */
355 cap = vht_cap.cap;
356
357 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
358 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
359 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
360 }
361
362 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
363 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
364 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
365 }
366
367 /* reserve and fill IE */
368 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
369 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
370 }
371
372 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
373 {
374 struct ieee80211_local *local = sdata->local;
375 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
376 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
377 struct sk_buff *skb;
378 struct ieee80211_mgmt *mgmt;
379 u8 *pos, qos_info;
380 size_t offset = 0, noffset;
381 int i, count, rates_len, supp_rates_len;
382 u16 capab;
383 struct ieee80211_supported_band *sband;
384 struct ieee80211_chanctx_conf *chanctx_conf;
385 struct ieee80211_channel *chan;
386 u32 rates = 0;
387
388 lockdep_assert_held(&ifmgd->mtx);
389
390 rcu_read_lock();
391 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
392 if (WARN_ON(!chanctx_conf)) {
393 rcu_read_unlock();
394 return;
395 }
396 chan = chanctx_conf->def.chan;
397 rcu_read_unlock();
398 sband = local->hw.wiphy->bands[chan->band];
399
400 if (assoc_data->supp_rates_len) {
401 /*
402 * Get all rates supported by the device and the AP as
403 * some APs don't like getting a superset of their rates
404 * in the association request (e.g. D-Link DAP 1353 in
405 * b-only mode)...
406 */
407 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
408 assoc_data->supp_rates_len,
409 sband, &rates);
410 } else {
411 /*
412 * In case AP not provide any supported rates information
413 * before association, we send information element(s) with
414 * all rates that we support.
415 */
416 rates = ~0;
417 rates_len = sband->n_bitrates;
418 }
419
420 skb = alloc_skb(local->hw.extra_tx_headroom +
421 sizeof(*mgmt) + /* bit too much but doesn't matter */
422 2 + assoc_data->ssid_len + /* SSID */
423 4 + rates_len + /* (extended) rates */
424 4 + /* power capability */
425 2 + 2 * sband->n_channels + /* supported channels */
426 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
427 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
428 assoc_data->ie_len + /* extra IEs */
429 9, /* WMM */
430 GFP_KERNEL);
431 if (!skb)
432 return;
433
434 skb_reserve(skb, local->hw.extra_tx_headroom);
435
436 capab = WLAN_CAPABILITY_ESS;
437
438 if (sband->band == IEEE80211_BAND_2GHZ) {
439 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
440 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
441 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
442 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
443 }
444
445 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
446 capab |= WLAN_CAPABILITY_PRIVACY;
447
448 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
449 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
450 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
451
452 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
453 memset(mgmt, 0, 24);
454 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
455 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
456 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
457
458 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
459 skb_put(skb, 10);
460 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
461 IEEE80211_STYPE_REASSOC_REQ);
462 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
463 mgmt->u.reassoc_req.listen_interval =
464 cpu_to_le16(local->hw.conf.listen_interval);
465 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
466 ETH_ALEN);
467 } else {
468 skb_put(skb, 4);
469 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
470 IEEE80211_STYPE_ASSOC_REQ);
471 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
472 mgmt->u.assoc_req.listen_interval =
473 cpu_to_le16(local->hw.conf.listen_interval);
474 }
475
476 /* SSID */
477 pos = skb_put(skb, 2 + assoc_data->ssid_len);
478 *pos++ = WLAN_EID_SSID;
479 *pos++ = assoc_data->ssid_len;
480 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
481
482 /* add all rates which were marked to be used above */
483 supp_rates_len = rates_len;
484 if (supp_rates_len > 8)
485 supp_rates_len = 8;
486
487 pos = skb_put(skb, supp_rates_len + 2);
488 *pos++ = WLAN_EID_SUPP_RATES;
489 *pos++ = supp_rates_len;
490
491 count = 0;
492 for (i = 0; i < sband->n_bitrates; i++) {
493 if (BIT(i) & rates) {
494 int rate = sband->bitrates[i].bitrate;
495 *pos++ = (u8) (rate / 5);
496 if (++count == 8)
497 break;
498 }
499 }
500
501 if (rates_len > count) {
502 pos = skb_put(skb, rates_len - count + 2);
503 *pos++ = WLAN_EID_EXT_SUPP_RATES;
504 *pos++ = rates_len - count;
505
506 for (i++; i < sband->n_bitrates; i++) {
507 if (BIT(i) & rates) {
508 int rate = sband->bitrates[i].bitrate;
509 *pos++ = (u8) (rate / 5);
510 }
511 }
512 }
513
514 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
515 /* 1. power capabilities */
516 pos = skb_put(skb, 4);
517 *pos++ = WLAN_EID_PWR_CAPABILITY;
518 *pos++ = 2;
519 *pos++ = 0; /* min tx power */
520 *pos++ = chan->max_power; /* max tx power */
521
522 /* 2. supported channels */
523 /* TODO: get this in reg domain format */
524 pos = skb_put(skb, 2 * sband->n_channels + 2);
525 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
526 *pos++ = 2 * sband->n_channels;
527 for (i = 0; i < sband->n_channels; i++) {
528 *pos++ = ieee80211_frequency_to_channel(
529 sband->channels[i].center_freq);
530 *pos++ = 1; /* one channel in the subband*/
531 }
532 }
533
534 /* if present, add any custom IEs that go before HT */
535 if (assoc_data->ie_len && assoc_data->ie) {
536 static const u8 before_ht[] = {
537 WLAN_EID_SSID,
538 WLAN_EID_SUPP_RATES,
539 WLAN_EID_EXT_SUPP_RATES,
540 WLAN_EID_PWR_CAPABILITY,
541 WLAN_EID_SUPPORTED_CHANNELS,
542 WLAN_EID_RSN,
543 WLAN_EID_QOS_CAPA,
544 WLAN_EID_RRM_ENABLED_CAPABILITIES,
545 WLAN_EID_MOBILITY_DOMAIN,
546 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
547 };
548 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
549 before_ht, ARRAY_SIZE(before_ht),
550 offset);
551 pos = skb_put(skb, noffset - offset);
552 memcpy(pos, assoc_data->ie + offset, noffset - offset);
553 offset = noffset;
554 }
555
556 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
557 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
558 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
559
560 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
561 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
562 sband, chan, sdata->smps_mode);
563
564 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
565 ieee80211_add_vht_ie(sdata, skb, sband);
566
567 /* if present, add any custom non-vendor IEs that go after HT */
568 if (assoc_data->ie_len && assoc_data->ie) {
569 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
570 assoc_data->ie_len,
571 offset);
572 pos = skb_put(skb, noffset - offset);
573 memcpy(pos, assoc_data->ie + offset, noffset - offset);
574 offset = noffset;
575 }
576
577 if (assoc_data->wmm) {
578 if (assoc_data->uapsd) {
579 qos_info = ifmgd->uapsd_queues;
580 qos_info |= (ifmgd->uapsd_max_sp_len <<
581 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
582 } else {
583 qos_info = 0;
584 }
585
586 pos = skb_put(skb, 9);
587 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
588 *pos++ = 7; /* len */
589 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
590 *pos++ = 0x50;
591 *pos++ = 0xf2;
592 *pos++ = 2; /* WME */
593 *pos++ = 0; /* WME info */
594 *pos++ = 1; /* WME ver */
595 *pos++ = qos_info;
596 }
597
598 /* add any remaining custom (i.e. vendor specific here) IEs */
599 if (assoc_data->ie_len && assoc_data->ie) {
600 noffset = assoc_data->ie_len;
601 pos = skb_put(skb, noffset - offset);
602 memcpy(pos, assoc_data->ie + offset, noffset - offset);
603 }
604
605 drv_mgd_prepare_tx(local, sdata);
606
607 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
608 ieee80211_tx_skb(sdata, skb);
609 }
610
611 void ieee80211_send_pspoll(struct ieee80211_local *local,
612 struct ieee80211_sub_if_data *sdata)
613 {
614 struct ieee80211_pspoll *pspoll;
615 struct sk_buff *skb;
616
617 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
618 if (!skb)
619 return;
620
621 pspoll = (struct ieee80211_pspoll *) skb->data;
622 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
623
624 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
625 ieee80211_tx_skb(sdata, skb);
626 }
627
628 void ieee80211_send_nullfunc(struct ieee80211_local *local,
629 struct ieee80211_sub_if_data *sdata,
630 int powersave)
631 {
632 struct sk_buff *skb;
633 struct ieee80211_hdr_3addr *nullfunc;
634 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
635
636 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
637 if (!skb)
638 return;
639
640 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
641 if (powersave)
642 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
643
644 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
645 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
646 IEEE80211_STA_CONNECTION_POLL))
647 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
648
649 ieee80211_tx_skb(sdata, skb);
650 }
651
652 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
653 struct ieee80211_sub_if_data *sdata)
654 {
655 struct sk_buff *skb;
656 struct ieee80211_hdr *nullfunc;
657 __le16 fc;
658
659 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
660 return;
661
662 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
663 if (!skb)
664 return;
665
666 skb_reserve(skb, local->hw.extra_tx_headroom);
667
668 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
669 memset(nullfunc, 0, 30);
670 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
671 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
672 nullfunc->frame_control = fc;
673 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
674 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
675 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
676 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
677
678 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
679 ieee80211_tx_skb(sdata, skb);
680 }
681
682 /* spectrum management related things */
683 static void ieee80211_chswitch_work(struct work_struct *work)
684 {
685 struct ieee80211_sub_if_data *sdata =
686 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
688
689 if (!ieee80211_sdata_running(sdata))
690 return;
691
692 mutex_lock(&ifmgd->mtx);
693 if (!ifmgd->associated)
694 goto out;
695
696 sdata->local->_oper_channel = sdata->local->csa_channel;
697 if (!sdata->local->ops->channel_switch) {
698 /* call "hw_config" only if doing sw channel switch */
699 ieee80211_hw_config(sdata->local,
700 IEEE80211_CONF_CHANGE_CHANNEL);
701 } else {
702 /* update the device channel directly */
703 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
704 }
705
706 /* XXX: shouldn't really modify cfg80211-owned data! */
707 ifmgd->associated->channel = sdata->local->_oper_channel;
708
709 /* XXX: wait for a beacon first? */
710 ieee80211_wake_queues_by_reason(&sdata->local->hw,
711 IEEE80211_QUEUE_STOP_REASON_CSA);
712 out:
713 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
714 mutex_unlock(&ifmgd->mtx);
715 }
716
717 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
718 {
719 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
721
722 trace_api_chswitch_done(sdata, success);
723 if (!success) {
724 sdata_info(sdata,
725 "driver channel switch failed, disconnecting\n");
726 ieee80211_queue_work(&sdata->local->hw,
727 &ifmgd->csa_connection_drop_work);
728 } else {
729 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
730 }
731 }
732 EXPORT_SYMBOL(ieee80211_chswitch_done);
733
734 static void ieee80211_chswitch_timer(unsigned long data)
735 {
736 struct ieee80211_sub_if_data *sdata =
737 (struct ieee80211_sub_if_data *) data;
738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
739
740 if (sdata->local->quiescing) {
741 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
742 return;
743 }
744
745 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
746 }
747
748 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
749 struct ieee80211_channel_sw_ie *sw_elem,
750 struct ieee80211_bss *bss,
751 u64 timestamp)
752 {
753 struct cfg80211_bss *cbss =
754 container_of((void *)bss, struct cfg80211_bss, priv);
755 struct ieee80211_channel *new_ch;
756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
757 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
758 cbss->channel->band);
759 struct ieee80211_chanctx *chanctx;
760
761 ASSERT_MGD_MTX(ifmgd);
762
763 if (!ifmgd->associated)
764 return;
765
766 if (sdata->local->scanning)
767 return;
768
769 /* Disregard subsequent beacons if we are already running a timer
770 processing a CSA */
771
772 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
773 return;
774
775 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
776 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
777 sdata_info(sdata,
778 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
779 ifmgd->associated->bssid, new_freq);
780 ieee80211_queue_work(&sdata->local->hw,
781 &ifmgd->csa_connection_drop_work);
782 return;
783 }
784
785 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
786
787 if (sdata->local->use_chanctx) {
788 sdata_info(sdata,
789 "not handling channel switch with channel contexts\n");
790 ieee80211_queue_work(&sdata->local->hw,
791 &ifmgd->csa_connection_drop_work);
792 return;
793 }
794
795 mutex_lock(&sdata->local->chanctx_mtx);
796 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
797 mutex_unlock(&sdata->local->chanctx_mtx);
798 return;
799 }
800 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
801 struct ieee80211_chanctx, conf);
802 if (chanctx->refcount > 1) {
803 sdata_info(sdata,
804 "channel switch with multiple interfaces on the same channel, disconnecting\n");
805 ieee80211_queue_work(&sdata->local->hw,
806 &ifmgd->csa_connection_drop_work);
807 mutex_unlock(&sdata->local->chanctx_mtx);
808 return;
809 }
810 mutex_unlock(&sdata->local->chanctx_mtx);
811
812 sdata->local->csa_channel = new_ch;
813
814 if (sw_elem->mode)
815 ieee80211_stop_queues_by_reason(&sdata->local->hw,
816 IEEE80211_QUEUE_STOP_REASON_CSA);
817
818 if (sdata->local->ops->channel_switch) {
819 /* use driver's channel switch callback */
820 struct ieee80211_channel_switch ch_switch = {
821 .timestamp = timestamp,
822 .block_tx = sw_elem->mode,
823 .channel = new_ch,
824 .count = sw_elem->count,
825 };
826
827 drv_channel_switch(sdata->local, &ch_switch);
828 return;
829 }
830
831 /* channel switch handled in software */
832 if (sw_elem->count <= 1)
833 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
834 else
835 mod_timer(&ifmgd->chswitch_timer,
836 TU_TO_EXP_TIME(sw_elem->count *
837 cbss->beacon_interval));
838 }
839
840 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
841 struct ieee80211_channel *channel,
842 const u8 *country_ie, u8 country_ie_len,
843 const u8 *pwr_constr_elem)
844 {
845 struct ieee80211_country_ie_triplet *triplet;
846 int chan = ieee80211_frequency_to_channel(channel->center_freq);
847 int i, chan_pwr, chan_increment, new_ap_level;
848 bool have_chan_pwr = false;
849
850 /* Invalid IE */
851 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
852 return 0;
853
854 triplet = (void *)(country_ie + 3);
855 country_ie_len -= 3;
856
857 switch (channel->band) {
858 default:
859 WARN_ON_ONCE(1);
860 /* fall through */
861 case IEEE80211_BAND_2GHZ:
862 case IEEE80211_BAND_60GHZ:
863 chan_increment = 1;
864 break;
865 case IEEE80211_BAND_5GHZ:
866 chan_increment = 4;
867 break;
868 }
869
870 /* find channel */
871 while (country_ie_len >= 3) {
872 u8 first_channel = triplet->chans.first_channel;
873
874 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
875 goto next;
876
877 for (i = 0; i < triplet->chans.num_channels; i++) {
878 if (first_channel + i * chan_increment == chan) {
879 have_chan_pwr = true;
880 chan_pwr = triplet->chans.max_power;
881 break;
882 }
883 }
884 if (have_chan_pwr)
885 break;
886
887 next:
888 triplet++;
889 country_ie_len -= 3;
890 }
891
892 if (!have_chan_pwr)
893 return 0;
894
895 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
896
897 if (sdata->ap_power_level == new_ap_level)
898 return 0;
899
900 sdata_info(sdata,
901 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
902 new_ap_level, chan_pwr, *pwr_constr_elem,
903 sdata->u.mgd.bssid);
904 sdata->ap_power_level = new_ap_level;
905 if (__ieee80211_recalc_txpower(sdata))
906 return BSS_CHANGED_TXPOWER;
907 return 0;
908 }
909
910 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
911 {
912 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
913 struct ieee80211_local *local = sdata->local;
914 struct ieee80211_conf *conf = &local->hw.conf;
915
916 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
917 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
918 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
919
920 local->disable_dynamic_ps = false;
921 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
922 }
923 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
924
925 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
926 {
927 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
928 struct ieee80211_local *local = sdata->local;
929 struct ieee80211_conf *conf = &local->hw.conf;
930
931 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
932 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
933 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
934
935 local->disable_dynamic_ps = true;
936 conf->dynamic_ps_timeout = 0;
937 del_timer_sync(&local->dynamic_ps_timer);
938 ieee80211_queue_work(&local->hw,
939 &local->dynamic_ps_enable_work);
940 }
941 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
942
943 /* powersave */
944 static void ieee80211_enable_ps(struct ieee80211_local *local,
945 struct ieee80211_sub_if_data *sdata)
946 {
947 struct ieee80211_conf *conf = &local->hw.conf;
948
949 /*
950 * If we are scanning right now then the parameters will
951 * take effect when scan finishes.
952 */
953 if (local->scanning)
954 return;
955
956 if (conf->dynamic_ps_timeout > 0 &&
957 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
958 mod_timer(&local->dynamic_ps_timer, jiffies +
959 msecs_to_jiffies(conf->dynamic_ps_timeout));
960 } else {
961 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
962 ieee80211_send_nullfunc(local, sdata, 1);
963
964 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
965 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
966 return;
967
968 conf->flags |= IEEE80211_CONF_PS;
969 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
970 }
971 }
972
973 static void ieee80211_change_ps(struct ieee80211_local *local)
974 {
975 struct ieee80211_conf *conf = &local->hw.conf;
976
977 if (local->ps_sdata) {
978 ieee80211_enable_ps(local, local->ps_sdata);
979 } else if (conf->flags & IEEE80211_CONF_PS) {
980 conf->flags &= ~IEEE80211_CONF_PS;
981 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
982 del_timer_sync(&local->dynamic_ps_timer);
983 cancel_work_sync(&local->dynamic_ps_enable_work);
984 }
985 }
986
987 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
988 {
989 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
990 struct sta_info *sta = NULL;
991 bool authorized = false;
992
993 if (!mgd->powersave)
994 return false;
995
996 if (mgd->broken_ap)
997 return false;
998
999 if (!mgd->associated)
1000 return false;
1001
1002 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1003 IEEE80211_STA_CONNECTION_POLL))
1004 return false;
1005
1006 rcu_read_lock();
1007 sta = sta_info_get(sdata, mgd->bssid);
1008 if (sta)
1009 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1010 rcu_read_unlock();
1011
1012 return authorized;
1013 }
1014
1015 /* need to hold RTNL or interface lock */
1016 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1017 {
1018 struct ieee80211_sub_if_data *sdata, *found = NULL;
1019 int count = 0;
1020 int timeout;
1021
1022 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1023 local->ps_sdata = NULL;
1024 return;
1025 }
1026
1027 list_for_each_entry(sdata, &local->interfaces, list) {
1028 if (!ieee80211_sdata_running(sdata))
1029 continue;
1030 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1031 /* If an AP vif is found, then disable PS
1032 * by setting the count to zero thereby setting
1033 * ps_sdata to NULL.
1034 */
1035 count = 0;
1036 break;
1037 }
1038 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1039 continue;
1040 found = sdata;
1041 count++;
1042 }
1043
1044 if (count == 1 && ieee80211_powersave_allowed(found)) {
1045 struct ieee80211_conf *conf = &local->hw.conf;
1046 s32 beaconint_us;
1047
1048 if (latency < 0)
1049 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1050
1051 beaconint_us = ieee80211_tu_to_usec(
1052 found->vif.bss_conf.beacon_int);
1053
1054 timeout = local->dynamic_ps_forced_timeout;
1055 if (timeout < 0) {
1056 /*
1057 * Go to full PSM if the user configures a very low
1058 * latency requirement.
1059 * The 2000 second value is there for compatibility
1060 * until the PM_QOS_NETWORK_LATENCY is configured
1061 * with real values.
1062 */
1063 if (latency > (1900 * USEC_PER_MSEC) &&
1064 latency != (2000 * USEC_PER_SEC))
1065 timeout = 0;
1066 else
1067 timeout = 100;
1068 }
1069 local->dynamic_ps_user_timeout = timeout;
1070 if (!local->disable_dynamic_ps)
1071 conf->dynamic_ps_timeout =
1072 local->dynamic_ps_user_timeout;
1073
1074 if (beaconint_us > latency) {
1075 local->ps_sdata = NULL;
1076 } else {
1077 int maxslp = 1;
1078 u8 dtimper = found->u.mgd.dtim_period;
1079
1080 /* If the TIM IE is invalid, pretend the value is 1 */
1081 if (!dtimper)
1082 dtimper = 1;
1083 else if (dtimper > 1)
1084 maxslp = min_t(int, dtimper,
1085 latency / beaconint_us);
1086
1087 local->hw.conf.max_sleep_period = maxslp;
1088 local->hw.conf.ps_dtim_period = dtimper;
1089 local->ps_sdata = found;
1090 }
1091 } else {
1092 local->ps_sdata = NULL;
1093 }
1094
1095 ieee80211_change_ps(local);
1096 }
1097
1098 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1099 {
1100 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1101
1102 if (sdata->vif.bss_conf.ps != ps_allowed) {
1103 sdata->vif.bss_conf.ps = ps_allowed;
1104 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1105 }
1106 }
1107
1108 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1109 {
1110 struct ieee80211_local *local =
1111 container_of(work, struct ieee80211_local,
1112 dynamic_ps_disable_work);
1113
1114 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1115 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1116 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1117 }
1118
1119 ieee80211_wake_queues_by_reason(&local->hw,
1120 IEEE80211_QUEUE_STOP_REASON_PS);
1121 }
1122
1123 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1124 {
1125 struct ieee80211_local *local =
1126 container_of(work, struct ieee80211_local,
1127 dynamic_ps_enable_work);
1128 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1129 struct ieee80211_if_managed *ifmgd;
1130 unsigned long flags;
1131 int q;
1132
1133 /* can only happen when PS was just disabled anyway */
1134 if (!sdata)
1135 return;
1136
1137 ifmgd = &sdata->u.mgd;
1138
1139 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1140 return;
1141
1142 if (!local->disable_dynamic_ps &&
1143 local->hw.conf.dynamic_ps_timeout > 0) {
1144 /* don't enter PS if TX frames are pending */
1145 if (drv_tx_frames_pending(local)) {
1146 mod_timer(&local->dynamic_ps_timer, jiffies +
1147 msecs_to_jiffies(
1148 local->hw.conf.dynamic_ps_timeout));
1149 return;
1150 }
1151
1152 /*
1153 * transmission can be stopped by others which leads to
1154 * dynamic_ps_timer expiry. Postpone the ps timer if it
1155 * is not the actual idle state.
1156 */
1157 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1158 for (q = 0; q < local->hw.queues; q++) {
1159 if (local->queue_stop_reasons[q]) {
1160 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1161 flags);
1162 mod_timer(&local->dynamic_ps_timer, jiffies +
1163 msecs_to_jiffies(
1164 local->hw.conf.dynamic_ps_timeout));
1165 return;
1166 }
1167 }
1168 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1169 }
1170
1171 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1172 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1173 netif_tx_stop_all_queues(sdata->dev);
1174
1175 if (drv_tx_frames_pending(local))
1176 mod_timer(&local->dynamic_ps_timer, jiffies +
1177 msecs_to_jiffies(
1178 local->hw.conf.dynamic_ps_timeout));
1179 else {
1180 ieee80211_send_nullfunc(local, sdata, 1);
1181 /* Flush to get the tx status of nullfunc frame */
1182 drv_flush(local, false);
1183 }
1184 }
1185
1186 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1187 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1188 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1189 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1190 local->hw.conf.flags |= IEEE80211_CONF_PS;
1191 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1192 }
1193
1194 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1195 netif_tx_wake_all_queues(sdata->dev);
1196 }
1197
1198 void ieee80211_dynamic_ps_timer(unsigned long data)
1199 {
1200 struct ieee80211_local *local = (void *) data;
1201
1202 if (local->quiescing || local->suspended)
1203 return;
1204
1205 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1206 }
1207
1208 /* MLME */
1209 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1210 struct ieee80211_sub_if_data *sdata,
1211 u8 *wmm_param, size_t wmm_param_len)
1212 {
1213 struct ieee80211_tx_queue_params params;
1214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1215 size_t left;
1216 int count;
1217 u8 *pos, uapsd_queues = 0;
1218
1219 if (!local->ops->conf_tx)
1220 return false;
1221
1222 if (local->hw.queues < IEEE80211_NUM_ACS)
1223 return false;
1224
1225 if (!wmm_param)
1226 return false;
1227
1228 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1229 return false;
1230
1231 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1232 uapsd_queues = ifmgd->uapsd_queues;
1233
1234 count = wmm_param[6] & 0x0f;
1235 if (count == ifmgd->wmm_last_param_set)
1236 return false;
1237 ifmgd->wmm_last_param_set = count;
1238
1239 pos = wmm_param + 8;
1240 left = wmm_param_len - 8;
1241
1242 memset(&params, 0, sizeof(params));
1243
1244 sdata->wmm_acm = 0;
1245 for (; left >= 4; left -= 4, pos += 4) {
1246 int aci = (pos[0] >> 5) & 0x03;
1247 int acm = (pos[0] >> 4) & 0x01;
1248 bool uapsd = false;
1249 int queue;
1250
1251 switch (aci) {
1252 case 1: /* AC_BK */
1253 queue = 3;
1254 if (acm)
1255 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1256 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1257 uapsd = true;
1258 break;
1259 case 2: /* AC_VI */
1260 queue = 1;
1261 if (acm)
1262 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1263 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1264 uapsd = true;
1265 break;
1266 case 3: /* AC_VO */
1267 queue = 0;
1268 if (acm)
1269 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1270 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1271 uapsd = true;
1272 break;
1273 case 0: /* AC_BE */
1274 default:
1275 queue = 2;
1276 if (acm)
1277 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1278 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1279 uapsd = true;
1280 break;
1281 }
1282
1283 params.aifs = pos[0] & 0x0f;
1284 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1285 params.cw_min = ecw2cw(pos[1] & 0x0f);
1286 params.txop = get_unaligned_le16(pos + 2);
1287 params.uapsd = uapsd;
1288
1289 mlme_dbg(sdata,
1290 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1291 queue, aci, acm,
1292 params.aifs, params.cw_min, params.cw_max,
1293 params.txop, params.uapsd);
1294 sdata->tx_conf[queue] = params;
1295 if (drv_conf_tx(local, sdata, queue, &params))
1296 sdata_err(sdata,
1297 "failed to set TX queue parameters for queue %d\n",
1298 queue);
1299 }
1300
1301 /* enable WMM or activate new settings */
1302 sdata->vif.bss_conf.qos = true;
1303 return true;
1304 }
1305
1306 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1307 {
1308 lockdep_assert_held(&sdata->local->mtx);
1309
1310 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1311 IEEE80211_STA_BEACON_POLL);
1312 ieee80211_run_deferred_scan(sdata->local);
1313 }
1314
1315 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1316 {
1317 mutex_lock(&sdata->local->mtx);
1318 __ieee80211_stop_poll(sdata);
1319 mutex_unlock(&sdata->local->mtx);
1320 }
1321
1322 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1323 u16 capab, bool erp_valid, u8 erp)
1324 {
1325 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1326 u32 changed = 0;
1327 bool use_protection;
1328 bool use_short_preamble;
1329 bool use_short_slot;
1330
1331 if (erp_valid) {
1332 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1333 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1334 } else {
1335 use_protection = false;
1336 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1337 }
1338
1339 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1340 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1341 use_short_slot = true;
1342
1343 if (use_protection != bss_conf->use_cts_prot) {
1344 bss_conf->use_cts_prot = use_protection;
1345 changed |= BSS_CHANGED_ERP_CTS_PROT;
1346 }
1347
1348 if (use_short_preamble != bss_conf->use_short_preamble) {
1349 bss_conf->use_short_preamble = use_short_preamble;
1350 changed |= BSS_CHANGED_ERP_PREAMBLE;
1351 }
1352
1353 if (use_short_slot != bss_conf->use_short_slot) {
1354 bss_conf->use_short_slot = use_short_slot;
1355 changed |= BSS_CHANGED_ERP_SLOT;
1356 }
1357
1358 return changed;
1359 }
1360
1361 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1362 struct cfg80211_bss *cbss,
1363 u32 bss_info_changed)
1364 {
1365 struct ieee80211_bss *bss = (void *)cbss->priv;
1366 struct ieee80211_local *local = sdata->local;
1367 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1368
1369 bss_info_changed |= BSS_CHANGED_ASSOC;
1370 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1371 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1372
1373 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1374 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1375
1376 sdata->u.mgd.associated = cbss;
1377 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1378
1379 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1380
1381 if (sdata->vif.p2p) {
1382 const struct cfg80211_bss_ies *ies;
1383
1384 rcu_read_lock();
1385 ies = rcu_dereference(cbss->ies);
1386 if (ies) {
1387 u8 noa[2];
1388 int ret;
1389
1390 ret = cfg80211_get_p2p_attr(
1391 ies->data, ies->len,
1392 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1393 noa, sizeof(noa));
1394 if (ret >= 2) {
1395 bss_conf->p2p_oppps = noa[1] & 0x80;
1396 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1397 bss_info_changed |= BSS_CHANGED_P2P_PS;
1398 sdata->u.mgd.p2p_noa_index = noa[0];
1399 }
1400 }
1401 rcu_read_unlock();
1402 }
1403
1404 /* just to be sure */
1405 ieee80211_stop_poll(sdata);
1406
1407 ieee80211_led_assoc(local, 1);
1408
1409 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
1410 /*
1411 * If the AP is buggy we may get here with no DTIM period
1412 * known, so assume it's 1 which is the only safe assumption
1413 * in that case, although if the TIM IE is broken powersave
1414 * probably just won't work at all.
1415 */
1416 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1417 } else {
1418 bss_conf->dtim_period = 0;
1419 }
1420
1421 bss_conf->assoc = 1;
1422
1423 /* Tell the driver to monitor connection quality (if supported) */
1424 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1425 bss_conf->cqm_rssi_thold)
1426 bss_info_changed |= BSS_CHANGED_CQM;
1427
1428 /* Enable ARP filtering */
1429 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1430 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1431 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1432 }
1433
1434 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1435
1436 mutex_lock(&local->iflist_mtx);
1437 ieee80211_recalc_ps(local, -1);
1438 mutex_unlock(&local->iflist_mtx);
1439
1440 ieee80211_recalc_smps(sdata);
1441 ieee80211_recalc_ps_vif(sdata);
1442
1443 netif_tx_start_all_queues(sdata->dev);
1444 netif_carrier_on(sdata->dev);
1445 }
1446
1447 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1448 u16 stype, u16 reason, bool tx,
1449 u8 *frame_buf)
1450 {
1451 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1452 struct ieee80211_local *local = sdata->local;
1453 struct sta_info *sta;
1454 u32 changed = 0;
1455
1456 ASSERT_MGD_MTX(ifmgd);
1457
1458 if (WARN_ON_ONCE(tx && !frame_buf))
1459 return;
1460
1461 if (WARN_ON(!ifmgd->associated))
1462 return;
1463
1464 ieee80211_stop_poll(sdata);
1465
1466 ifmgd->associated = NULL;
1467
1468 /*
1469 * we need to commit the associated = NULL change because the
1470 * scan code uses that to determine whether this iface should
1471 * go to/wake up from powersave or not -- and could otherwise
1472 * wake the queues erroneously.
1473 */
1474 smp_mb();
1475
1476 /*
1477 * Thus, we can only afterwards stop the queues -- to account
1478 * for the case where another CPU is finishing a scan at this
1479 * time -- we don't want the scan code to enable queues.
1480 */
1481
1482 netif_tx_stop_all_queues(sdata->dev);
1483 netif_carrier_off(sdata->dev);
1484
1485 mutex_lock(&local->sta_mtx);
1486 sta = sta_info_get(sdata, ifmgd->bssid);
1487 if (sta) {
1488 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1489 ieee80211_sta_tear_down_BA_sessions(sta, false);
1490 }
1491 mutex_unlock(&local->sta_mtx);
1492
1493 /*
1494 * if we want to get out of ps before disassoc (why?) we have
1495 * to do it before sending disassoc, as otherwise the null-packet
1496 * won't be valid.
1497 */
1498 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1499 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1500 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1501 }
1502 local->ps_sdata = NULL;
1503
1504 /* disable per-vif ps */
1505 ieee80211_recalc_ps_vif(sdata);
1506
1507 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1508 if (tx)
1509 drv_flush(local, false);
1510
1511 /* deauthenticate/disassociate now */
1512 if (tx || frame_buf)
1513 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1514 reason, tx, frame_buf);
1515
1516 /* flush out frame */
1517 if (tx)
1518 drv_flush(local, false);
1519
1520 /* clear bssid only after building the needed mgmt frames */
1521 memset(ifmgd->bssid, 0, ETH_ALEN);
1522
1523 /* remove AP and TDLS peers */
1524 sta_info_flush(local, sdata);
1525
1526 /* finally reset all BSS / config parameters */
1527 changed |= ieee80211_reset_erp_info(sdata);
1528
1529 ieee80211_led_assoc(local, 0);
1530 changed |= BSS_CHANGED_ASSOC;
1531 sdata->vif.bss_conf.assoc = false;
1532
1533 sdata->vif.bss_conf.p2p_ctwindow = 0;
1534 sdata->vif.bss_conf.p2p_oppps = false;
1535
1536 /* on the next assoc, re-program HT parameters */
1537 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1538 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1539
1540 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1541
1542 del_timer_sync(&local->dynamic_ps_timer);
1543 cancel_work_sync(&local->dynamic_ps_enable_work);
1544
1545 /* Disable ARP filtering */
1546 if (sdata->vif.bss_conf.arp_filter_enabled) {
1547 sdata->vif.bss_conf.arp_filter_enabled = false;
1548 changed |= BSS_CHANGED_ARP_FILTER;
1549 }
1550
1551 sdata->vif.bss_conf.qos = false;
1552 changed |= BSS_CHANGED_QOS;
1553
1554 /* The BSSID (not really interesting) and HT changed */
1555 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1556 ieee80211_bss_info_change_notify(sdata, changed);
1557
1558 /* disassociated - set to defaults now */
1559 ieee80211_set_wmm_default(sdata, false);
1560
1561 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1562 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1563 del_timer_sync(&sdata->u.mgd.timer);
1564 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1565
1566 sdata->u.mgd.timers_running = 0;
1567
1568 sdata->vif.bss_conf.dtim_period = 0;
1569
1570 ifmgd->flags = 0;
1571 ieee80211_vif_release_channel(sdata);
1572 }
1573
1574 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1575 struct ieee80211_hdr *hdr)
1576 {
1577 /*
1578 * We can postpone the mgd.timer whenever receiving unicast frames
1579 * from AP because we know that the connection is working both ways
1580 * at that time. But multicast frames (and hence also beacons) must
1581 * be ignored here, because we need to trigger the timer during
1582 * data idle periods for sending the periodic probe request to the
1583 * AP we're connected to.
1584 */
1585 if (is_multicast_ether_addr(hdr->addr1))
1586 return;
1587
1588 ieee80211_sta_reset_conn_monitor(sdata);
1589 }
1590
1591 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1592 {
1593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1594 struct ieee80211_local *local = sdata->local;
1595
1596 mutex_lock(&local->mtx);
1597 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1598 IEEE80211_STA_CONNECTION_POLL))) {
1599 mutex_unlock(&local->mtx);
1600 return;
1601 }
1602
1603 __ieee80211_stop_poll(sdata);
1604
1605 mutex_lock(&local->iflist_mtx);
1606 ieee80211_recalc_ps(local, -1);
1607 mutex_unlock(&local->iflist_mtx);
1608
1609 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1610 goto out;
1611
1612 /*
1613 * We've received a probe response, but are not sure whether
1614 * we have or will be receiving any beacons or data, so let's
1615 * schedule the timers again, just in case.
1616 */
1617 ieee80211_sta_reset_beacon_monitor(sdata);
1618
1619 mod_timer(&ifmgd->conn_mon_timer,
1620 round_jiffies_up(jiffies +
1621 IEEE80211_CONNECTION_IDLE_TIME));
1622 out:
1623 mutex_unlock(&local->mtx);
1624 }
1625
1626 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1627 struct ieee80211_hdr *hdr, bool ack)
1628 {
1629 if (!ieee80211_is_data(hdr->frame_control))
1630 return;
1631
1632 if (ack)
1633 ieee80211_sta_reset_conn_monitor(sdata);
1634
1635 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1636 sdata->u.mgd.probe_send_count > 0) {
1637 if (ack)
1638 sdata->u.mgd.probe_send_count = 0;
1639 else
1640 sdata->u.mgd.nullfunc_failed = true;
1641 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1642 }
1643 }
1644
1645 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1646 {
1647 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1648 const u8 *ssid;
1649 u8 *dst = ifmgd->associated->bssid;
1650 u8 unicast_limit = max(1, max_probe_tries - 3);
1651
1652 /*
1653 * Try sending broadcast probe requests for the last three
1654 * probe requests after the first ones failed since some
1655 * buggy APs only support broadcast probe requests.
1656 */
1657 if (ifmgd->probe_send_count >= unicast_limit)
1658 dst = NULL;
1659
1660 /*
1661 * When the hardware reports an accurate Tx ACK status, it's
1662 * better to send a nullfunc frame instead of a probe request,
1663 * as it will kick us off the AP quickly if we aren't associated
1664 * anymore. The timeout will be reset if the frame is ACKed by
1665 * the AP.
1666 */
1667 ifmgd->probe_send_count++;
1668
1669 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1670 ifmgd->nullfunc_failed = false;
1671 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1672 } else {
1673 int ssid_len;
1674
1675 rcu_read_lock();
1676 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1677 if (WARN_ON_ONCE(ssid == NULL))
1678 ssid_len = 0;
1679 else
1680 ssid_len = ssid[1];
1681
1682 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1683 0, (u32) -1, true, false,
1684 ifmgd->associated->channel, false);
1685 rcu_read_unlock();
1686 }
1687
1688 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1689 run_again(ifmgd, ifmgd->probe_timeout);
1690 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1691 drv_flush(sdata->local, false);
1692 }
1693
1694 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1695 bool beacon)
1696 {
1697 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1698 bool already = false;
1699
1700 if (!ieee80211_sdata_running(sdata))
1701 return;
1702
1703 mutex_lock(&ifmgd->mtx);
1704
1705 if (!ifmgd->associated)
1706 goto out;
1707
1708 mutex_lock(&sdata->local->mtx);
1709
1710 if (sdata->local->tmp_channel || sdata->local->scanning) {
1711 mutex_unlock(&sdata->local->mtx);
1712 goto out;
1713 }
1714
1715 if (beacon)
1716 mlme_dbg_ratelimited(sdata,
1717 "detected beacon loss from AP - sending probe request\n");
1718
1719 ieee80211_cqm_rssi_notify(&sdata->vif,
1720 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
1721
1722 /*
1723 * The driver/our work has already reported this event or the
1724 * connection monitoring has kicked in and we have already sent
1725 * a probe request. Or maybe the AP died and the driver keeps
1726 * reporting until we disassociate...
1727 *
1728 * In either case we have to ignore the current call to this
1729 * function (except for setting the correct probe reason bit)
1730 * because otherwise we would reset the timer every time and
1731 * never check whether we received a probe response!
1732 */
1733 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1734 IEEE80211_STA_CONNECTION_POLL))
1735 already = true;
1736
1737 if (beacon)
1738 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1739 else
1740 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1741
1742 mutex_unlock(&sdata->local->mtx);
1743
1744 if (already)
1745 goto out;
1746
1747 mutex_lock(&sdata->local->iflist_mtx);
1748 ieee80211_recalc_ps(sdata->local, -1);
1749 mutex_unlock(&sdata->local->iflist_mtx);
1750
1751 ifmgd->probe_send_count = 0;
1752 ieee80211_mgd_probe_ap_send(sdata);
1753 out:
1754 mutex_unlock(&ifmgd->mtx);
1755 }
1756
1757 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1758 struct ieee80211_vif *vif)
1759 {
1760 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1761 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1762 struct cfg80211_bss *cbss;
1763 struct sk_buff *skb;
1764 const u8 *ssid;
1765 int ssid_len;
1766
1767 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1768 return NULL;
1769
1770 ASSERT_MGD_MTX(ifmgd);
1771
1772 if (ifmgd->associated)
1773 cbss = ifmgd->associated;
1774 else if (ifmgd->auth_data)
1775 cbss = ifmgd->auth_data->bss;
1776 else if (ifmgd->assoc_data)
1777 cbss = ifmgd->assoc_data->bss;
1778 else
1779 return NULL;
1780
1781 rcu_read_lock();
1782 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
1783 if (WARN_ON_ONCE(ssid == NULL))
1784 ssid_len = 0;
1785 else
1786 ssid_len = ssid[1];
1787
1788 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
1789 (u32) -1, cbss->channel,
1790 ssid + 2, ssid_len,
1791 NULL, 0, true);
1792 rcu_read_unlock();
1793
1794 return skb;
1795 }
1796 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1797
1798 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1799 bool transmit_frame)
1800 {
1801 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1802 struct ieee80211_local *local = sdata->local;
1803 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1804
1805 mutex_lock(&ifmgd->mtx);
1806 if (!ifmgd->associated) {
1807 mutex_unlock(&ifmgd->mtx);
1808 return;
1809 }
1810
1811 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1812 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1813 transmit_frame, frame_buf);
1814 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1815 mutex_unlock(&ifmgd->mtx);
1816
1817 /*
1818 * must be outside lock due to cfg80211,
1819 * but that's not a problem.
1820 */
1821 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1822
1823 mutex_lock(&local->mtx);
1824 ieee80211_recalc_idle(local);
1825 mutex_unlock(&local->mtx);
1826 }
1827
1828 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1829 {
1830 struct ieee80211_sub_if_data *sdata =
1831 container_of(work, struct ieee80211_sub_if_data,
1832 u.mgd.beacon_connection_loss_work);
1833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1834 struct sta_info *sta;
1835
1836 if (ifmgd->associated) {
1837 rcu_read_lock();
1838 sta = sta_info_get(sdata, ifmgd->bssid);
1839 if (sta)
1840 sta->beacon_loss_count++;
1841 rcu_read_unlock();
1842 }
1843
1844 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1845 sdata_info(sdata, "Connection to AP %pM lost\n",
1846 ifmgd->bssid);
1847 __ieee80211_disconnect(sdata, false);
1848 } else {
1849 ieee80211_mgd_probe_ap(sdata, true);
1850 }
1851 }
1852
1853 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1854 {
1855 struct ieee80211_sub_if_data *sdata =
1856 container_of(work, struct ieee80211_sub_if_data,
1857 u.mgd.csa_connection_drop_work);
1858
1859 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1860 IEEE80211_QUEUE_STOP_REASON_CSA);
1861 __ieee80211_disconnect(sdata, true);
1862 }
1863
1864 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1865 {
1866 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1867 struct ieee80211_hw *hw = &sdata->local->hw;
1868
1869 trace_api_beacon_loss(sdata);
1870
1871 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1872 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1873 }
1874 EXPORT_SYMBOL(ieee80211_beacon_loss);
1875
1876 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1877 {
1878 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1879 struct ieee80211_hw *hw = &sdata->local->hw;
1880
1881 trace_api_connection_loss(sdata);
1882
1883 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1884 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1885 }
1886 EXPORT_SYMBOL(ieee80211_connection_loss);
1887
1888
1889 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1890 bool assoc)
1891 {
1892 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1893
1894 lockdep_assert_held(&sdata->u.mgd.mtx);
1895
1896 if (!assoc) {
1897 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1898
1899 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1900 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1901 sdata->u.mgd.flags = 0;
1902 ieee80211_vif_release_channel(sdata);
1903 }
1904
1905 cfg80211_put_bss(auth_data->bss);
1906 kfree(auth_data);
1907 sdata->u.mgd.auth_data = NULL;
1908 }
1909
1910 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1911 struct ieee80211_mgmt *mgmt, size_t len)
1912 {
1913 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1914 u8 *pos;
1915 struct ieee802_11_elems elems;
1916
1917 pos = mgmt->u.auth.variable;
1918 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1919 if (!elems.challenge)
1920 return;
1921 auth_data->expected_transaction = 4;
1922 drv_mgd_prepare_tx(sdata->local, sdata);
1923 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
1924 elems.challenge - 2, elems.challenge_len + 2,
1925 auth_data->bss->bssid, auth_data->bss->bssid,
1926 auth_data->key, auth_data->key_len,
1927 auth_data->key_idx);
1928 }
1929
1930 static enum rx_mgmt_action __must_check
1931 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1932 struct ieee80211_mgmt *mgmt, size_t len)
1933 {
1934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1935 u8 bssid[ETH_ALEN];
1936 u16 auth_alg, auth_transaction, status_code;
1937 struct sta_info *sta;
1938
1939 lockdep_assert_held(&ifmgd->mtx);
1940
1941 if (len < 24 + 6)
1942 return RX_MGMT_NONE;
1943
1944 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1945 return RX_MGMT_NONE;
1946
1947 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1948
1949 if (!ether_addr_equal(bssid, mgmt->bssid))
1950 return RX_MGMT_NONE;
1951
1952 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1953 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1954 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1955
1956 if (auth_alg != ifmgd->auth_data->algorithm ||
1957 auth_transaction != ifmgd->auth_data->expected_transaction) {
1958 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1959 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1960 auth_transaction,
1961 ifmgd->auth_data->expected_transaction);
1962 return RX_MGMT_NONE;
1963 }
1964
1965 if (status_code != WLAN_STATUS_SUCCESS) {
1966 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1967 mgmt->sa, status_code);
1968 ieee80211_destroy_auth_data(sdata, false);
1969 return RX_MGMT_CFG80211_RX_AUTH;
1970 }
1971
1972 switch (ifmgd->auth_data->algorithm) {
1973 case WLAN_AUTH_OPEN:
1974 case WLAN_AUTH_LEAP:
1975 case WLAN_AUTH_FT:
1976 case WLAN_AUTH_SAE:
1977 break;
1978 case WLAN_AUTH_SHARED_KEY:
1979 if (ifmgd->auth_data->expected_transaction != 4) {
1980 ieee80211_auth_challenge(sdata, mgmt, len);
1981 /* need another frame */
1982 return RX_MGMT_NONE;
1983 }
1984 break;
1985 default:
1986 WARN_ONCE(1, "invalid auth alg %d",
1987 ifmgd->auth_data->algorithm);
1988 return RX_MGMT_NONE;
1989 }
1990
1991 sdata_info(sdata, "authenticated\n");
1992 ifmgd->auth_data->done = true;
1993 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1994 run_again(ifmgd, ifmgd->auth_data->timeout);
1995
1996 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
1997 ifmgd->auth_data->expected_transaction != 2) {
1998 /*
1999 * Report auth frame to user space for processing since another
2000 * round of Authentication frames is still needed.
2001 */
2002 return RX_MGMT_CFG80211_RX_AUTH;
2003 }
2004
2005 /* move station state to auth */
2006 mutex_lock(&sdata->local->sta_mtx);
2007 sta = sta_info_get(sdata, bssid);
2008 if (!sta) {
2009 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2010 goto out_err;
2011 }
2012 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2013 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2014 goto out_err;
2015 }
2016 mutex_unlock(&sdata->local->sta_mtx);
2017
2018 return RX_MGMT_CFG80211_RX_AUTH;
2019 out_err:
2020 mutex_unlock(&sdata->local->sta_mtx);
2021 /* ignore frame -- wait for timeout */
2022 return RX_MGMT_NONE;
2023 }
2024
2025
2026 static enum rx_mgmt_action __must_check
2027 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2028 struct ieee80211_mgmt *mgmt, size_t len)
2029 {
2030 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2031 const u8 *bssid = NULL;
2032 u16 reason_code;
2033
2034 lockdep_assert_held(&ifmgd->mtx);
2035
2036 if (len < 24 + 2)
2037 return RX_MGMT_NONE;
2038
2039 if (!ifmgd->associated ||
2040 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2041 return RX_MGMT_NONE;
2042
2043 bssid = ifmgd->associated->bssid;
2044
2045 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2046
2047 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2048 bssid, reason_code);
2049
2050 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2051
2052 mutex_lock(&sdata->local->mtx);
2053 ieee80211_recalc_idle(sdata->local);
2054 mutex_unlock(&sdata->local->mtx);
2055
2056 return RX_MGMT_CFG80211_DEAUTH;
2057 }
2058
2059
2060 static enum rx_mgmt_action __must_check
2061 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2062 struct ieee80211_mgmt *mgmt, size_t len)
2063 {
2064 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2065 u16 reason_code;
2066
2067 lockdep_assert_held(&ifmgd->mtx);
2068
2069 if (len < 24 + 2)
2070 return RX_MGMT_NONE;
2071
2072 if (!ifmgd->associated ||
2073 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2074 return RX_MGMT_NONE;
2075
2076 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2077
2078 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2079 mgmt->sa, reason_code);
2080
2081 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2082
2083 mutex_lock(&sdata->local->mtx);
2084 ieee80211_recalc_idle(sdata->local);
2085 mutex_unlock(&sdata->local->mtx);
2086
2087 return RX_MGMT_CFG80211_DISASSOC;
2088 }
2089
2090 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2091 u8 *supp_rates, unsigned int supp_rates_len,
2092 u32 *rates, u32 *basic_rates,
2093 bool *have_higher_than_11mbit,
2094 int *min_rate, int *min_rate_index)
2095 {
2096 int i, j;
2097
2098 for (i = 0; i < supp_rates_len; i++) {
2099 int rate = (supp_rates[i] & 0x7f) * 5;
2100 bool is_basic = !!(supp_rates[i] & 0x80);
2101
2102 if (rate > 110)
2103 *have_higher_than_11mbit = true;
2104
2105 /*
2106 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2107 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2108 *
2109 * Note: Even through the membership selector and the basic
2110 * rate flag share the same bit, they are not exactly
2111 * the same.
2112 */
2113 if (!!(supp_rates[i] & 0x80) &&
2114 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2115 continue;
2116
2117 for (j = 0; j < sband->n_bitrates; j++) {
2118 if (sband->bitrates[j].bitrate == rate) {
2119 *rates |= BIT(j);
2120 if (is_basic)
2121 *basic_rates |= BIT(j);
2122 if (rate < *min_rate) {
2123 *min_rate = rate;
2124 *min_rate_index = j;
2125 }
2126 break;
2127 }
2128 }
2129 }
2130 }
2131
2132 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2133 bool assoc)
2134 {
2135 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2136
2137 lockdep_assert_held(&sdata->u.mgd.mtx);
2138
2139 if (!assoc) {
2140 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2141
2142 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2143 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2144 sdata->u.mgd.flags = 0;
2145 ieee80211_vif_release_channel(sdata);
2146 }
2147
2148 kfree(assoc_data);
2149 sdata->u.mgd.assoc_data = NULL;
2150 }
2151
2152 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2153 struct cfg80211_bss *cbss,
2154 struct ieee80211_mgmt *mgmt, size_t len)
2155 {
2156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2157 struct ieee80211_local *local = sdata->local;
2158 struct ieee80211_supported_band *sband;
2159 struct sta_info *sta;
2160 u8 *pos;
2161 u16 capab_info, aid;
2162 struct ieee802_11_elems elems;
2163 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2164 u32 changed = 0;
2165 int err;
2166
2167 /* AssocResp and ReassocResp have identical structure */
2168
2169 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2170 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2171
2172 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2173 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2174 aid);
2175 aid &= ~(BIT(15) | BIT(14));
2176
2177 ifmgd->broken_ap = false;
2178
2179 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2180 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2181 aid);
2182 aid = 0;
2183 ifmgd->broken_ap = true;
2184 }
2185
2186 pos = mgmt->u.assoc_resp.variable;
2187 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2188
2189 if (!elems.supp_rates) {
2190 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2191 return false;
2192 }
2193
2194 ifmgd->aid = aid;
2195
2196 mutex_lock(&sdata->local->sta_mtx);
2197 /*
2198 * station info was already allocated and inserted before
2199 * the association and should be available to us
2200 */
2201 sta = sta_info_get(sdata, cbss->bssid);
2202 if (WARN_ON(!sta)) {
2203 mutex_unlock(&sdata->local->sta_mtx);
2204 return false;
2205 }
2206
2207 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2208
2209 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2210 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2211 elems.ht_cap_elem, &sta->sta.ht_cap);
2212
2213 sta->supports_40mhz =
2214 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2215
2216 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2217 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2218 elems.vht_cap_elem,
2219 &sta->sta.vht_cap);
2220
2221 rate_control_rate_init(sta);
2222
2223 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2224 set_sta_flag(sta, WLAN_STA_MFP);
2225
2226 if (elems.wmm_param)
2227 set_sta_flag(sta, WLAN_STA_WME);
2228
2229 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2230 if (!err)
2231 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2232 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2233 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2234 if (err) {
2235 sdata_info(sdata,
2236 "failed to move station %pM to desired state\n",
2237 sta->sta.addr);
2238 WARN_ON(__sta_info_destroy(sta));
2239 mutex_unlock(&sdata->local->sta_mtx);
2240 return false;
2241 }
2242
2243 mutex_unlock(&sdata->local->sta_mtx);
2244
2245 /*
2246 * Always handle WMM once after association regardless
2247 * of the first value the AP uses. Setting -1 here has
2248 * that effect because the AP values is an unsigned
2249 * 4-bit value.
2250 */
2251 ifmgd->wmm_last_param_set = -1;
2252
2253 if (elems.wmm_param)
2254 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2255 elems.wmm_param_len);
2256 else
2257 ieee80211_set_wmm_default(sdata, false);
2258 changed |= BSS_CHANGED_QOS;
2259
2260 if (elems.ht_operation && elems.wmm_param &&
2261 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2262 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2263 cbss->bssid, false);
2264
2265 /* set AID and assoc capability,
2266 * ieee80211_set_associated() will tell the driver */
2267 bss_conf->aid = aid;
2268 bss_conf->assoc_capability = capab_info;
2269 ieee80211_set_associated(sdata, cbss, changed);
2270
2271 /*
2272 * If we're using 4-addr mode, let the AP know that we're
2273 * doing so, so that it can create the STA VLAN on its side
2274 */
2275 if (ifmgd->use_4addr)
2276 ieee80211_send_4addr_nullfunc(local, sdata);
2277
2278 /*
2279 * Start timer to probe the connection to the AP now.
2280 * Also start the timer that will detect beacon loss.
2281 */
2282 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2283 ieee80211_sta_reset_beacon_monitor(sdata);
2284
2285 return true;
2286 }
2287
2288 static enum rx_mgmt_action __must_check
2289 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2290 struct ieee80211_mgmt *mgmt, size_t len,
2291 struct cfg80211_bss **bss)
2292 {
2293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2294 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2295 u16 capab_info, status_code, aid;
2296 struct ieee802_11_elems elems;
2297 u8 *pos;
2298 bool reassoc;
2299
2300 lockdep_assert_held(&ifmgd->mtx);
2301
2302 if (!assoc_data)
2303 return RX_MGMT_NONE;
2304 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2305 return RX_MGMT_NONE;
2306
2307 /*
2308 * AssocResp and ReassocResp have identical structure, so process both
2309 * of them in this function.
2310 */
2311
2312 if (len < 24 + 6)
2313 return RX_MGMT_NONE;
2314
2315 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2316 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2317 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2318 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2319
2320 sdata_info(sdata,
2321 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2322 reassoc ? "Rea" : "A", mgmt->sa,
2323 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2324
2325 pos = mgmt->u.assoc_resp.variable;
2326 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2327
2328 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2329 elems.timeout_int && elems.timeout_int_len == 5 &&
2330 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2331 u32 tu, ms;
2332 tu = get_unaligned_le32(elems.timeout_int + 1);
2333 ms = tu * 1024 / 1000;
2334 sdata_info(sdata,
2335 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2336 mgmt->sa, tu, ms);
2337 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2338 if (ms > IEEE80211_ASSOC_TIMEOUT)
2339 run_again(ifmgd, assoc_data->timeout);
2340 return RX_MGMT_NONE;
2341 }
2342
2343 *bss = assoc_data->bss;
2344
2345 if (status_code != WLAN_STATUS_SUCCESS) {
2346 sdata_info(sdata, "%pM denied association (code=%d)\n",
2347 mgmt->sa, status_code);
2348 ieee80211_destroy_assoc_data(sdata, false);
2349 } else {
2350 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2351 /* oops -- internal error -- send timeout for now */
2352 ieee80211_destroy_assoc_data(sdata, false);
2353 cfg80211_put_bss(*bss);
2354 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2355 }
2356 sdata_info(sdata, "associated\n");
2357
2358 /*
2359 * destroy assoc_data afterwards, as otherwise an idle
2360 * recalc after assoc_data is NULL but before associated
2361 * is set can cause the interface to go idle
2362 */
2363 ieee80211_destroy_assoc_data(sdata, true);
2364 }
2365
2366 return RX_MGMT_CFG80211_RX_ASSOC;
2367 }
2368
2369 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2370 struct ieee80211_mgmt *mgmt, size_t len,
2371 struct ieee80211_rx_status *rx_status,
2372 struct ieee802_11_elems *elems,
2373 bool beacon)
2374 {
2375 struct ieee80211_local *local = sdata->local;
2376 int freq;
2377 struct ieee80211_bss *bss;
2378 struct ieee80211_channel *channel;
2379 bool need_ps = false;
2380
2381 if ((sdata->u.mgd.associated &&
2382 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2383 (sdata->u.mgd.assoc_data &&
2384 ether_addr_equal(mgmt->bssid,
2385 sdata->u.mgd.assoc_data->bss->bssid))) {
2386 /* not previously set so we may need to recalc */
2387 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2388
2389 if (elems->tim && !elems->parse_error) {
2390 struct ieee80211_tim_ie *tim_ie = elems->tim;
2391 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2392 }
2393 }
2394
2395 if (elems->ds_params && elems->ds_params_len == 1)
2396 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2397 rx_status->band);
2398 else
2399 freq = rx_status->freq;
2400
2401 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2402
2403 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2404 return;
2405
2406 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2407 channel, beacon);
2408 if (bss)
2409 ieee80211_rx_bss_put(local, bss);
2410
2411 if (!sdata->u.mgd.associated)
2412 return;
2413
2414 if (need_ps) {
2415 mutex_lock(&local->iflist_mtx);
2416 ieee80211_recalc_ps(local, -1);
2417 mutex_unlock(&local->iflist_mtx);
2418 }
2419
2420 if (elems->ch_switch_ie &&
2421 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2422 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
2423 bss, rx_status->mactime);
2424 }
2425
2426
2427 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2428 struct sk_buff *skb)
2429 {
2430 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2431 struct ieee80211_if_managed *ifmgd;
2432 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2433 size_t baselen, len = skb->len;
2434 struct ieee802_11_elems elems;
2435
2436 ifmgd = &sdata->u.mgd;
2437
2438 ASSERT_MGD_MTX(ifmgd);
2439
2440 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2441 return; /* ignore ProbeResp to foreign address */
2442
2443 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2444 if (baselen > len)
2445 return;
2446
2447 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2448 &elems);
2449
2450 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2451
2452 if (ifmgd->associated &&
2453 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2454 ieee80211_reset_ap_probe(sdata);
2455
2456 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2457 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2458 /* got probe response, continue with auth */
2459 sdata_info(sdata, "direct probe responded\n");
2460 ifmgd->auth_data->tries = 0;
2461 ifmgd->auth_data->timeout = jiffies;
2462 run_again(ifmgd, ifmgd->auth_data->timeout);
2463 }
2464 }
2465
2466 /*
2467 * This is the canonical list of information elements we care about,
2468 * the filter code also gives us all changes to the Microsoft OUI
2469 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2470 *
2471 * We implement beacon filtering in software since that means we can
2472 * avoid processing the frame here and in cfg80211, and userspace
2473 * will not be able to tell whether the hardware supports it or not.
2474 *
2475 * XXX: This list needs to be dynamic -- userspace needs to be able to
2476 * add items it requires. It also needs to be able to tell us to
2477 * look out for other vendor IEs.
2478 */
2479 static const u64 care_about_ies =
2480 (1ULL << WLAN_EID_COUNTRY) |
2481 (1ULL << WLAN_EID_ERP_INFO) |
2482 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2483 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2484 (1ULL << WLAN_EID_HT_CAPABILITY) |
2485 (1ULL << WLAN_EID_HT_OPERATION);
2486
2487 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2488 struct ieee80211_mgmt *mgmt,
2489 size_t len,
2490 struct ieee80211_rx_status *rx_status)
2491 {
2492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2493 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2494 size_t baselen;
2495 struct ieee802_11_elems elems;
2496 struct ieee80211_local *local = sdata->local;
2497 struct ieee80211_chanctx_conf *chanctx_conf;
2498 struct ieee80211_channel *chan;
2499 u32 changed = 0;
2500 bool erp_valid;
2501 u8 erp_value = 0;
2502 u32 ncrc;
2503 u8 *bssid;
2504
2505 lockdep_assert_held(&ifmgd->mtx);
2506
2507 /* Process beacon from the current BSS */
2508 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2509 if (baselen > len)
2510 return;
2511
2512 rcu_read_lock();
2513 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2514 if (!chanctx_conf) {
2515 rcu_read_unlock();
2516 return;
2517 }
2518
2519 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2520 rcu_read_unlock();
2521 return;
2522 }
2523 chan = chanctx_conf->def.chan;
2524 rcu_read_unlock();
2525
2526 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2527 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2528 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2529 len - baselen, &elems);
2530
2531 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2532 false);
2533 ifmgd->assoc_data->have_beacon = true;
2534 ifmgd->assoc_data->sent_assoc = false;
2535 /* continue assoc process */
2536 ifmgd->assoc_data->timeout = jiffies;
2537 run_again(ifmgd, ifmgd->assoc_data->timeout);
2538 return;
2539 }
2540
2541 if (!ifmgd->associated ||
2542 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2543 return;
2544 bssid = ifmgd->associated->bssid;
2545
2546 /* Track average RSSI from the Beacon frames of the current AP */
2547 ifmgd->last_beacon_signal = rx_status->signal;
2548 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2549 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2550 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2551 ifmgd->last_cqm_event_signal = 0;
2552 ifmgd->count_beacon_signal = 1;
2553 ifmgd->last_ave_beacon_signal = 0;
2554 } else {
2555 ifmgd->ave_beacon_signal =
2556 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2557 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2558 ifmgd->ave_beacon_signal) / 16;
2559 ifmgd->count_beacon_signal++;
2560 }
2561
2562 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2563 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2564 int sig = ifmgd->ave_beacon_signal;
2565 int last_sig = ifmgd->last_ave_beacon_signal;
2566
2567 /*
2568 * if signal crosses either of the boundaries, invoke callback
2569 * with appropriate parameters
2570 */
2571 if (sig > ifmgd->rssi_max_thold &&
2572 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2573 ifmgd->last_ave_beacon_signal = sig;
2574 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2575 } else if (sig < ifmgd->rssi_min_thold &&
2576 (last_sig >= ifmgd->rssi_max_thold ||
2577 last_sig == 0)) {
2578 ifmgd->last_ave_beacon_signal = sig;
2579 drv_rssi_callback(local, RSSI_EVENT_LOW);
2580 }
2581 }
2582
2583 if (bss_conf->cqm_rssi_thold &&
2584 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2585 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2586 int sig = ifmgd->ave_beacon_signal / 16;
2587 int last_event = ifmgd->last_cqm_event_signal;
2588 int thold = bss_conf->cqm_rssi_thold;
2589 int hyst = bss_conf->cqm_rssi_hyst;
2590 if (sig < thold &&
2591 (last_event == 0 || sig < last_event - hyst)) {
2592 ifmgd->last_cqm_event_signal = sig;
2593 ieee80211_cqm_rssi_notify(
2594 &sdata->vif,
2595 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2596 GFP_KERNEL);
2597 } else if (sig > thold &&
2598 (last_event == 0 || sig > last_event + hyst)) {
2599 ifmgd->last_cqm_event_signal = sig;
2600 ieee80211_cqm_rssi_notify(
2601 &sdata->vif,
2602 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2603 GFP_KERNEL);
2604 }
2605 }
2606
2607 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2608 mlme_dbg_ratelimited(sdata,
2609 "cancelling probereq poll due to a received beacon\n");
2610 mutex_lock(&local->mtx);
2611 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
2612 ieee80211_run_deferred_scan(local);
2613 mutex_unlock(&local->mtx);
2614
2615 mutex_lock(&local->iflist_mtx);
2616 ieee80211_recalc_ps(local, -1);
2617 mutex_unlock(&local->iflist_mtx);
2618 }
2619
2620 /*
2621 * Push the beacon loss detection into the future since
2622 * we are processing a beacon from the AP just now.
2623 */
2624 ieee80211_sta_reset_beacon_monitor(sdata);
2625
2626 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2627 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2628 len - baselen, &elems,
2629 care_about_ies, ncrc);
2630
2631 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
2632 bool directed_tim = ieee80211_check_tim(elems.tim,
2633 elems.tim_len,
2634 ifmgd->aid);
2635 if (directed_tim) {
2636 if (local->hw.conf.dynamic_ps_timeout > 0) {
2637 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2638 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2639 ieee80211_hw_config(local,
2640 IEEE80211_CONF_CHANGE_PS);
2641 }
2642 ieee80211_send_nullfunc(local, sdata, 0);
2643 } else if (!local->pspolling && sdata->u.mgd.powersave) {
2644 local->pspolling = true;
2645
2646 /*
2647 * Here is assumed that the driver will be
2648 * able to send ps-poll frame and receive a
2649 * response even though power save mode is
2650 * enabled, but some drivers might require
2651 * to disable power save here. This needs
2652 * to be investigated.
2653 */
2654 ieee80211_send_pspoll(local, sdata);
2655 }
2656 }
2657 }
2658
2659 if (sdata->vif.p2p) {
2660 u8 noa[2];
2661 int ret;
2662
2663 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2664 len - baselen,
2665 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2666 noa, sizeof(noa));
2667 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2668 bss_conf->p2p_oppps = noa[1] & 0x80;
2669 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2670 changed |= BSS_CHANGED_P2P_PS;
2671 sdata->u.mgd.p2p_noa_index = noa[0];
2672 /*
2673 * make sure we update all information, the CRC
2674 * mechanism doesn't look at P2P attributes.
2675 */
2676 ifmgd->beacon_crc_valid = false;
2677 }
2678 }
2679
2680 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
2681 return;
2682 ifmgd->beacon_crc = ncrc;
2683 ifmgd->beacon_crc_valid = true;
2684
2685 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2686 true);
2687
2688 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2689 elems.wmm_param_len))
2690 changed |= BSS_CHANGED_QOS;
2691
2692 if (elems.erp_info && elems.erp_info_len >= 1) {
2693 erp_valid = true;
2694 erp_value = elems.erp_info[0];
2695 } else {
2696 erp_valid = false;
2697 }
2698 changed |= ieee80211_handle_bss_capability(sdata,
2699 le16_to_cpu(mgmt->u.beacon.capab_info),
2700 erp_valid, erp_value);
2701
2702
2703 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
2704 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2705 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2706 bssid, true);
2707
2708 if (elems.country_elem && elems.pwr_constr_elem &&
2709 mgmt->u.probe_resp.capab_info &
2710 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
2711 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2712 elems.country_elem,
2713 elems.country_elem_len,
2714 elems.pwr_constr_elem);
2715
2716 ieee80211_bss_info_change_notify(sdata, changed);
2717 }
2718
2719 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2720 struct sk_buff *skb)
2721 {
2722 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2723 struct ieee80211_rx_status *rx_status;
2724 struct ieee80211_mgmt *mgmt;
2725 struct cfg80211_bss *bss = NULL;
2726 enum rx_mgmt_action rma = RX_MGMT_NONE;
2727 u16 fc;
2728
2729 rx_status = (struct ieee80211_rx_status *) skb->cb;
2730 mgmt = (struct ieee80211_mgmt *) skb->data;
2731 fc = le16_to_cpu(mgmt->frame_control);
2732
2733 mutex_lock(&ifmgd->mtx);
2734
2735 switch (fc & IEEE80211_FCTL_STYPE) {
2736 case IEEE80211_STYPE_BEACON:
2737 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2738 break;
2739 case IEEE80211_STYPE_PROBE_RESP:
2740 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2741 break;
2742 case IEEE80211_STYPE_AUTH:
2743 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2744 break;
2745 case IEEE80211_STYPE_DEAUTH:
2746 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2747 break;
2748 case IEEE80211_STYPE_DISASSOC:
2749 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2750 break;
2751 case IEEE80211_STYPE_ASSOC_RESP:
2752 case IEEE80211_STYPE_REASSOC_RESP:
2753 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2754 break;
2755 case IEEE80211_STYPE_ACTION:
2756 switch (mgmt->u.action.category) {
2757 case WLAN_CATEGORY_SPECTRUM_MGMT:
2758 ieee80211_sta_process_chanswitch(sdata,
2759 &mgmt->u.action.u.chan_switch.sw_elem,
2760 (void *)ifmgd->associated->priv,
2761 rx_status->mactime);
2762 break;
2763 }
2764 }
2765 mutex_unlock(&ifmgd->mtx);
2766
2767 switch (rma) {
2768 case RX_MGMT_NONE:
2769 /* no action */
2770 break;
2771 case RX_MGMT_CFG80211_DEAUTH:
2772 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2773 break;
2774 case RX_MGMT_CFG80211_DISASSOC:
2775 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2776 break;
2777 case RX_MGMT_CFG80211_RX_AUTH:
2778 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2779 break;
2780 case RX_MGMT_CFG80211_RX_ASSOC:
2781 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2782 break;
2783 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2784 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2785 break;
2786 default:
2787 WARN(1, "unexpected: %d", rma);
2788 }
2789 }
2790
2791 static void ieee80211_sta_timer(unsigned long data)
2792 {
2793 struct ieee80211_sub_if_data *sdata =
2794 (struct ieee80211_sub_if_data *) data;
2795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2796 struct ieee80211_local *local = sdata->local;
2797
2798 if (local->quiescing) {
2799 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2800 return;
2801 }
2802
2803 ieee80211_queue_work(&local->hw, &sdata->work);
2804 }
2805
2806 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2807 u8 *bssid, u8 reason)
2808 {
2809 struct ieee80211_local *local = sdata->local;
2810 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2811 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2812
2813 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2814 false, frame_buf);
2815 mutex_unlock(&ifmgd->mtx);
2816
2817 /*
2818 * must be outside lock due to cfg80211,
2819 * but that's not a problem.
2820 */
2821 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
2822
2823 mutex_lock(&local->mtx);
2824 ieee80211_recalc_idle(local);
2825 mutex_unlock(&local->mtx);
2826
2827 mutex_lock(&ifmgd->mtx);
2828 }
2829
2830 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2831 {
2832 struct ieee80211_local *local = sdata->local;
2833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2834 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2835
2836 lockdep_assert_held(&ifmgd->mtx);
2837
2838 if (WARN_ON_ONCE(!auth_data))
2839 return -EINVAL;
2840
2841 auth_data->tries++;
2842
2843 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2844 sdata_info(sdata, "authentication with %pM timed out\n",
2845 auth_data->bss->bssid);
2846
2847 /*
2848 * Most likely AP is not in the range so remove the
2849 * bss struct for that AP.
2850 */
2851 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2852
2853 return -ETIMEDOUT;
2854 }
2855
2856 drv_mgd_prepare_tx(local, sdata);
2857
2858 if (auth_data->bss->proberesp_ies) {
2859 u16 trans = 1;
2860 u16 status = 0;
2861
2862 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2863 auth_data->bss->bssid, auth_data->tries,
2864 IEEE80211_AUTH_MAX_TRIES);
2865
2866 auth_data->expected_transaction = 2;
2867
2868 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2869 trans = auth_data->sae_trans;
2870 status = auth_data->sae_status;
2871 auth_data->expected_transaction = trans;
2872 }
2873
2874 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2875 auth_data->data, auth_data->data_len,
2876 auth_data->bss->bssid,
2877 auth_data->bss->bssid, NULL, 0, 0);
2878 } else {
2879 const u8 *ssidie;
2880
2881 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2882 auth_data->bss->bssid, auth_data->tries,
2883 IEEE80211_AUTH_MAX_TRIES);
2884
2885 rcu_read_lock();
2886 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2887 if (!ssidie) {
2888 rcu_read_unlock();
2889 return -EINVAL;
2890 }
2891 /*
2892 * Direct probe is sent to broadcast address as some APs
2893 * will not answer to direct packet in unassociated state.
2894 */
2895 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2896 NULL, 0, (u32) -1, true, false,
2897 auth_data->bss->channel, false);
2898 rcu_read_unlock();
2899 }
2900
2901 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2902 run_again(ifmgd, auth_data->timeout);
2903
2904 return 0;
2905 }
2906
2907 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2908 {
2909 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2910 struct ieee80211_local *local = sdata->local;
2911
2912 lockdep_assert_held(&sdata->u.mgd.mtx);
2913
2914 assoc_data->tries++;
2915 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2916 sdata_info(sdata, "association with %pM timed out\n",
2917 assoc_data->bss->bssid);
2918
2919 /*
2920 * Most likely AP is not in the range so remove the
2921 * bss struct for that AP.
2922 */
2923 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2924
2925 return -ETIMEDOUT;
2926 }
2927
2928 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2929 assoc_data->bss->bssid, assoc_data->tries,
2930 IEEE80211_ASSOC_MAX_TRIES);
2931 ieee80211_send_assoc(sdata);
2932
2933 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2934 run_again(&sdata->u.mgd, assoc_data->timeout);
2935
2936 return 0;
2937 }
2938
2939 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2940 {
2941 struct ieee80211_local *local = sdata->local;
2942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2943
2944 mutex_lock(&ifmgd->mtx);
2945
2946 if (ifmgd->auth_data &&
2947 time_after(jiffies, ifmgd->auth_data->timeout)) {
2948 if (ifmgd->auth_data->done) {
2949 /*
2950 * ok ... we waited for assoc but userspace didn't,
2951 * so let's just kill the auth data
2952 */
2953 ieee80211_destroy_auth_data(sdata, false);
2954 } else if (ieee80211_probe_auth(sdata)) {
2955 u8 bssid[ETH_ALEN];
2956
2957 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2958
2959 ieee80211_destroy_auth_data(sdata, false);
2960
2961 mutex_unlock(&ifmgd->mtx);
2962 cfg80211_send_auth_timeout(sdata->dev, bssid);
2963 mutex_lock(&ifmgd->mtx);
2964 }
2965 } else if (ifmgd->auth_data)
2966 run_again(ifmgd, ifmgd->auth_data->timeout);
2967
2968 if (ifmgd->assoc_data &&
2969 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2970 if (!ifmgd->assoc_data->have_beacon ||
2971 ieee80211_do_assoc(sdata)) {
2972 u8 bssid[ETH_ALEN];
2973
2974 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2975
2976 ieee80211_destroy_assoc_data(sdata, false);
2977
2978 mutex_unlock(&ifmgd->mtx);
2979 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2980 mutex_lock(&ifmgd->mtx);
2981 }
2982 } else if (ifmgd->assoc_data)
2983 run_again(ifmgd, ifmgd->assoc_data->timeout);
2984
2985 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2986 IEEE80211_STA_CONNECTION_POLL) &&
2987 ifmgd->associated) {
2988 u8 bssid[ETH_ALEN];
2989 int max_tries;
2990
2991 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2992
2993 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2994 max_tries = max_nullfunc_tries;
2995 else
2996 max_tries = max_probe_tries;
2997
2998 /* ACK received for nullfunc probing frame */
2999 if (!ifmgd->probe_send_count)
3000 ieee80211_reset_ap_probe(sdata);
3001 else if (ifmgd->nullfunc_failed) {
3002 if (ifmgd->probe_send_count < max_tries) {
3003 mlme_dbg(sdata,
3004 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3005 bssid, ifmgd->probe_send_count,
3006 max_tries);
3007 ieee80211_mgd_probe_ap_send(sdata);
3008 } else {
3009 mlme_dbg(sdata,
3010 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3011 bssid);
3012 ieee80211_sta_connection_lost(sdata, bssid,
3013 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
3014 }
3015 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3016 run_again(ifmgd, ifmgd->probe_timeout);
3017 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3018 mlme_dbg(sdata,
3019 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3020 bssid, probe_wait_ms);
3021 ieee80211_sta_connection_lost(sdata, bssid,
3022 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
3023 } else if (ifmgd->probe_send_count < max_tries) {
3024 mlme_dbg(sdata,
3025 "No probe response from AP %pM after %dms, try %d/%i\n",
3026 bssid, probe_wait_ms,
3027 ifmgd->probe_send_count, max_tries);
3028 ieee80211_mgd_probe_ap_send(sdata);
3029 } else {
3030 /*
3031 * We actually lost the connection ... or did we?
3032 * Let's make sure!
3033 */
3034 wiphy_debug(local->hw.wiphy,
3035 "%s: No probe response from AP %pM"
3036 " after %dms, disconnecting.\n",
3037 sdata->name,
3038 bssid, probe_wait_ms);
3039
3040 ieee80211_sta_connection_lost(sdata, bssid,
3041 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
3042 }
3043 }
3044
3045 mutex_unlock(&ifmgd->mtx);
3046
3047 mutex_lock(&local->mtx);
3048 ieee80211_recalc_idle(local);
3049 mutex_unlock(&local->mtx);
3050 }
3051
3052 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3053 {
3054 struct ieee80211_sub_if_data *sdata =
3055 (struct ieee80211_sub_if_data *) data;
3056 struct ieee80211_local *local = sdata->local;
3057
3058 if (local->quiescing)
3059 return;
3060
3061 ieee80211_queue_work(&sdata->local->hw,
3062 &sdata->u.mgd.beacon_connection_loss_work);
3063 }
3064
3065 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3066 {
3067 struct ieee80211_sub_if_data *sdata =
3068 (struct ieee80211_sub_if_data *) data;
3069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3070 struct ieee80211_local *local = sdata->local;
3071
3072 if (local->quiescing)
3073 return;
3074
3075 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3076 }
3077
3078 static void ieee80211_sta_monitor_work(struct work_struct *work)
3079 {
3080 struct ieee80211_sub_if_data *sdata =
3081 container_of(work, struct ieee80211_sub_if_data,
3082 u.mgd.monitor_work);
3083
3084 ieee80211_mgd_probe_ap(sdata, false);
3085 }
3086
3087 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3088 {
3089 u32 flags;
3090
3091 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3092 __ieee80211_stop_poll(sdata);
3093
3094 /* let's probe the connection once */
3095 flags = sdata->local->hw.flags;
3096 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3097 ieee80211_queue_work(&sdata->local->hw,
3098 &sdata->u.mgd.monitor_work);
3099 /* and do all the other regular work too */
3100 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3101 }
3102 }
3103
3104 #ifdef CONFIG_PM
3105 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3106 {
3107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3108
3109 /*
3110 * we need to use atomic bitops for the running bits
3111 * only because both timers might fire at the same
3112 * time -- the code here is properly synchronised.
3113 */
3114
3115 cancel_work_sync(&ifmgd->request_smps_work);
3116
3117 cancel_work_sync(&ifmgd->monitor_work);
3118 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
3119 cancel_work_sync(&ifmgd->csa_connection_drop_work);
3120 if (del_timer_sync(&ifmgd->timer))
3121 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3122
3123 cancel_work_sync(&ifmgd->chswitch_work);
3124 if (del_timer_sync(&ifmgd->chswitch_timer))
3125 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
3126
3127 /* these will just be re-established on connection */
3128 del_timer_sync(&ifmgd->conn_mon_timer);
3129 del_timer_sync(&ifmgd->bcn_mon_timer);
3130 }
3131
3132 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3133 {
3134 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3135
3136 if (!ifmgd->associated)
3137 return;
3138
3139 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3140 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3141 mutex_lock(&ifmgd->mtx);
3142 if (ifmgd->associated) {
3143 mlme_dbg(sdata,
3144 "driver requested disconnect after resume\n");
3145 ieee80211_sta_connection_lost(sdata,
3146 ifmgd->associated->bssid,
3147 WLAN_REASON_UNSPECIFIED);
3148 mutex_unlock(&ifmgd->mtx);
3149 return;
3150 }
3151 mutex_unlock(&ifmgd->mtx);
3152 }
3153
3154 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3155 add_timer(&ifmgd->timer);
3156 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3157 add_timer(&ifmgd->chswitch_timer);
3158 ieee80211_sta_reset_beacon_monitor(sdata);
3159
3160 mutex_lock(&sdata->local->mtx);
3161 ieee80211_restart_sta_timer(sdata);
3162 mutex_unlock(&sdata->local->mtx);
3163 }
3164 #endif
3165
3166 /* interface setup */
3167 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3168 {
3169 struct ieee80211_if_managed *ifmgd;
3170
3171 ifmgd = &sdata->u.mgd;
3172 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3173 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3174 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3175 ieee80211_beacon_connection_loss_work);
3176 INIT_WORK(&ifmgd->csa_connection_drop_work,
3177 ieee80211_csa_connection_drop_work);
3178 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3179 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3180 (unsigned long) sdata);
3181 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3182 (unsigned long) sdata);
3183 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3184 (unsigned long) sdata);
3185 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3186 (unsigned long) sdata);
3187
3188 ifmgd->flags = 0;
3189 ifmgd->powersave = sdata->wdev.ps;
3190 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3191 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
3192
3193 mutex_init(&ifmgd->mtx);
3194
3195 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3196 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3197 else
3198 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3199 }
3200
3201 /* scan finished notification */
3202 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3203 {
3204 struct ieee80211_sub_if_data *sdata;
3205
3206 /* Restart STA timers */
3207 rcu_read_lock();
3208 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3209 ieee80211_restart_sta_timer(sdata);
3210 rcu_read_unlock();
3211 }
3212
3213 int ieee80211_max_network_latency(struct notifier_block *nb,
3214 unsigned long data, void *dummy)
3215 {
3216 s32 latency_usec = (s32) data;
3217 struct ieee80211_local *local =
3218 container_of(nb, struct ieee80211_local,
3219 network_latency_notifier);
3220
3221 mutex_lock(&local->iflist_mtx);
3222 ieee80211_recalc_ps(local, latency_usec);
3223 mutex_unlock(&local->iflist_mtx);
3224
3225 return 0;
3226 }
3227
3228 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3229 {
3230 u32 ret;
3231 int tmp;
3232
3233 switch (c->width) {
3234 case NL80211_CHAN_WIDTH_20:
3235 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3236 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3237 break;
3238 case NL80211_CHAN_WIDTH_40:
3239 c->width = NL80211_CHAN_WIDTH_20;
3240 c->center_freq1 = c->chan->center_freq;
3241 ret = IEEE80211_STA_DISABLE_40MHZ |
3242 IEEE80211_STA_DISABLE_VHT;
3243 break;
3244 case NL80211_CHAN_WIDTH_80:
3245 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3246 /* n_P40 */
3247 tmp /= 2;
3248 /* freq_P40 */
3249 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3250 c->width = NL80211_CHAN_WIDTH_40;
3251 ret = IEEE80211_STA_DISABLE_VHT;
3252 break;
3253 case NL80211_CHAN_WIDTH_80P80:
3254 c->center_freq2 = 0;
3255 c->width = NL80211_CHAN_WIDTH_80;
3256 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3257 IEEE80211_STA_DISABLE_160MHZ;
3258 break;
3259 case NL80211_CHAN_WIDTH_160:
3260 /* n_P20 */
3261 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3262 /* n_P80 */
3263 tmp /= 4;
3264 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3265 c->width = NL80211_CHAN_WIDTH_80;
3266 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3267 IEEE80211_STA_DISABLE_160MHZ;
3268 break;
3269 default:
3270 case NL80211_CHAN_WIDTH_20_NOHT:
3271 WARN_ON_ONCE(1);
3272 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3273 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3274 break;
3275 }
3276
3277 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3278
3279 return ret;
3280 }
3281
3282 static u32
3283 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3284 struct ieee80211_supported_band *sband,
3285 struct ieee80211_channel *channel,
3286 const struct ieee80211_ht_operation *ht_oper,
3287 const struct ieee80211_vht_operation *vht_oper,
3288 struct cfg80211_chan_def *chandef)
3289 {
3290 struct cfg80211_chan_def vht_chandef;
3291 u32 ht_cfreq, ret;
3292
3293 chandef->chan = channel;
3294 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3295 chandef->center_freq1 = channel->center_freq;
3296 chandef->center_freq2 = 0;
3297
3298 if (!ht_oper || !sband->ht_cap.ht_supported) {
3299 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3300 goto out;
3301 }
3302
3303 chandef->width = NL80211_CHAN_WIDTH_20;
3304
3305 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3306 channel->band);
3307 /* check that channel matches the right operating channel */
3308 if (channel->center_freq != ht_cfreq) {
3309 /*
3310 * It's possible that some APs are confused here;
3311 * Netgear WNDR3700 sometimes reports 4 higher than
3312 * the actual channel in association responses, but
3313 * since we look at probe response/beacon data here
3314 * it should be OK.
3315 */
3316 sdata_info(sdata,
3317 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3318 channel->center_freq, ht_cfreq,
3319 ht_oper->primary_chan, channel->band);
3320 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3321 goto out;
3322 }
3323
3324 /* check 40 MHz support, if we have it */
3325 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3326 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3327 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3328 chandef->width = NL80211_CHAN_WIDTH_40;
3329 chandef->center_freq1 += 10;
3330 break;
3331 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3332 chandef->width = NL80211_CHAN_WIDTH_40;
3333 chandef->center_freq1 -= 10;
3334 break;
3335 }
3336 } else {
3337 /* 40 MHz (and 80 MHz) must be supported for VHT */
3338 ret = IEEE80211_STA_DISABLE_VHT;
3339 goto out;
3340 }
3341
3342 if (!vht_oper || !sband->vht_cap.vht_supported) {
3343 ret = IEEE80211_STA_DISABLE_VHT;
3344 goto out;
3345 }
3346
3347 vht_chandef.chan = channel;
3348 vht_chandef.center_freq1 =
3349 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3350 channel->band);
3351 vht_chandef.center_freq2 = 0;
3352
3353 if (vht_oper->center_freq_seg2_idx)
3354 vht_chandef.center_freq2 =
3355 ieee80211_channel_to_frequency(
3356 vht_oper->center_freq_seg2_idx,
3357 channel->band);
3358
3359 switch (vht_oper->chan_width) {
3360 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3361 vht_chandef.width = chandef->width;
3362 break;
3363 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3364 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3365 break;
3366 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3367 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3368 break;
3369 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3370 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3371 break;
3372 default:
3373 sdata_info(sdata,
3374 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3375 vht_oper->chan_width);
3376 ret = IEEE80211_STA_DISABLE_VHT;
3377 goto out;
3378 }
3379
3380 if (!cfg80211_chandef_valid(&vht_chandef)) {
3381 sdata_info(sdata,
3382 "AP VHT information is invalid, disable VHT\n");
3383 ret = IEEE80211_STA_DISABLE_VHT;
3384 goto out;
3385 }
3386
3387 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3388 ret = 0;
3389 goto out;
3390 }
3391
3392 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3393 sdata_info(sdata,
3394 "AP VHT information doesn't match HT, disable VHT\n");
3395 ret = IEEE80211_STA_DISABLE_VHT;
3396 goto out;
3397 }
3398
3399 *chandef = vht_chandef;
3400
3401 ret = 0;
3402
3403 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3404 IEEE80211_CHAN_DISABLED)) {
3405 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3406 ret = IEEE80211_STA_DISABLE_HT |
3407 IEEE80211_STA_DISABLE_VHT;
3408 goto out;
3409 }
3410
3411 ret = chandef_downgrade(chandef);
3412 }
3413
3414 if (chandef->width != vht_chandef.width)
3415 sdata_info(sdata,
3416 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3417
3418 out:
3419 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3420 return ret;
3421 }
3422
3423 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3424 struct cfg80211_bss *cbss)
3425 {
3426 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3427 const u8 *ht_cap_ie, *vht_cap_ie;
3428 const struct ieee80211_ht_cap *ht_cap;
3429 const struct ieee80211_vht_cap *vht_cap;
3430 u8 chains = 1;
3431
3432 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3433 return chains;
3434
3435 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3436 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3437 ht_cap = (void *)(ht_cap_ie + 2);
3438 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3439 /*
3440 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3441 * "Tx Unequal Modulation Supported" fields.
3442 */
3443 }
3444
3445 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3446 return chains;
3447
3448 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3449 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3450 u8 nss;
3451 u16 tx_mcs_map;
3452
3453 vht_cap = (void *)(vht_cap_ie + 2);
3454 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3455 for (nss = 8; nss > 0; nss--) {
3456 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3457 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3458 break;
3459 }
3460 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3461 chains = max(chains, nss);
3462 }
3463
3464 return chains;
3465 }
3466
3467 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3468 struct cfg80211_bss *cbss)
3469 {
3470 struct ieee80211_local *local = sdata->local;
3471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3472 const struct ieee80211_ht_operation *ht_oper = NULL;
3473 const struct ieee80211_vht_operation *vht_oper = NULL;
3474 struct ieee80211_supported_band *sband;
3475 struct cfg80211_chan_def chandef;
3476 int ret;
3477
3478 sband = local->hw.wiphy->bands[cbss->channel->band];
3479
3480 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3481 IEEE80211_STA_DISABLE_80P80MHZ |
3482 IEEE80211_STA_DISABLE_160MHZ);
3483
3484 rcu_read_lock();
3485
3486 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3487 sband->ht_cap.ht_supported) {
3488 const u8 *ht_oper_ie;
3489
3490 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3491 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3492 ht_oper = (void *)(ht_oper_ie + 2);
3493 }
3494
3495 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3496 sband->vht_cap.vht_supported) {
3497 const u8 *vht_oper_ie;
3498
3499 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3500 WLAN_EID_VHT_OPERATION);
3501 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3502 vht_oper = (void *)(vht_oper_ie + 2);
3503 if (vht_oper && !ht_oper) {
3504 vht_oper = NULL;
3505 sdata_info(sdata,
3506 "AP advertised VHT without HT, disabling both\n");
3507 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3508 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
3509 }
3510 }
3511
3512 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3513 cbss->channel,
3514 ht_oper, vht_oper,
3515 &chandef);
3516
3517 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3518 local->rx_chains);
3519
3520 rcu_read_unlock();
3521
3522 /* will change later if needed */
3523 sdata->smps_mode = IEEE80211_SMPS_OFF;
3524
3525 /*
3526 * If this fails (possibly due to channel context sharing
3527 * on incompatible channels, e.g. 80+80 and 160 sharing the
3528 * same control channel) try to use a smaller bandwidth.
3529 */
3530 ret = ieee80211_vif_use_channel(sdata, &chandef,
3531 IEEE80211_CHANCTX_SHARED);
3532 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3533 ifmgd->flags |= chandef_downgrade(&chandef);
3534 return ret;
3535 }
3536
3537 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3538 struct cfg80211_bss *cbss, bool assoc)
3539 {
3540 struct ieee80211_local *local = sdata->local;
3541 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3542 struct ieee80211_bss *bss = (void *)cbss->priv;
3543 struct sta_info *new_sta = NULL;
3544 bool have_sta = false;
3545 int err;
3546
3547 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3548 return -EINVAL;
3549
3550 if (assoc) {
3551 rcu_read_lock();
3552 have_sta = sta_info_get(sdata, cbss->bssid);
3553 rcu_read_unlock();
3554 }
3555
3556 if (!have_sta) {
3557 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3558 if (!new_sta)
3559 return -ENOMEM;
3560 }
3561
3562 mutex_lock(&local->mtx);
3563 ieee80211_recalc_idle(sdata->local);
3564 mutex_unlock(&local->mtx);
3565
3566 if (new_sta) {
3567 u32 rates = 0, basic_rates = 0;
3568 bool have_higher_than_11mbit;
3569 int min_rate = INT_MAX, min_rate_index = -1;
3570 struct ieee80211_supported_band *sband;
3571
3572 sband = local->hw.wiphy->bands[cbss->channel->band];
3573
3574 err = ieee80211_prep_channel(sdata, cbss);
3575 if (err) {
3576 sta_info_free(local, new_sta);
3577 return err;
3578 }
3579
3580 ieee80211_get_rates(sband, bss->supp_rates,
3581 bss->supp_rates_len,
3582 &rates, &basic_rates,
3583 &have_higher_than_11mbit,
3584 &min_rate, &min_rate_index);
3585
3586 /*
3587 * This used to be a workaround for basic rates missing
3588 * in the association response frame. Now that we no
3589 * longer use the basic rates from there, it probably
3590 * doesn't happen any more, but keep the workaround so
3591 * in case some *other* APs are buggy in different ways
3592 * we can connect -- with a warning.
3593 */
3594 if (!basic_rates && min_rate_index >= 0) {
3595 sdata_info(sdata,
3596 "No basic rates, using min rate instead\n");
3597 basic_rates = BIT(min_rate_index);
3598 }
3599
3600 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3601 sdata->vif.bss_conf.basic_rates = basic_rates;
3602
3603 /* cf. IEEE 802.11 9.2.12 */
3604 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3605 have_higher_than_11mbit)
3606 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3607 else
3608 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3609
3610 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3611
3612 /* set timing information */
3613 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3614 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3615 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3616
3617 /* tell driver about BSSID, basic rates and timing */
3618 ieee80211_bss_info_change_notify(sdata,
3619 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3620 BSS_CHANGED_BEACON_INT);
3621
3622 if (assoc)
3623 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3624
3625 err = sta_info_insert(new_sta);
3626 new_sta = NULL;
3627 if (err) {
3628 sdata_info(sdata,
3629 "failed to insert STA entry for the AP (error %d)\n",
3630 err);
3631 return err;
3632 }
3633 } else
3634 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3635
3636 return 0;
3637 }
3638
3639 /* config hooks */
3640 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3641 struct cfg80211_auth_request *req)
3642 {
3643 struct ieee80211_local *local = sdata->local;
3644 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3645 struct ieee80211_mgd_auth_data *auth_data;
3646 u16 auth_alg;
3647 int err;
3648
3649 /* prepare auth data structure */
3650
3651 switch (req->auth_type) {
3652 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3653 auth_alg = WLAN_AUTH_OPEN;
3654 break;
3655 case NL80211_AUTHTYPE_SHARED_KEY:
3656 if (IS_ERR(local->wep_tx_tfm))
3657 return -EOPNOTSUPP;
3658 auth_alg = WLAN_AUTH_SHARED_KEY;
3659 break;
3660 case NL80211_AUTHTYPE_FT:
3661 auth_alg = WLAN_AUTH_FT;
3662 break;
3663 case NL80211_AUTHTYPE_NETWORK_EAP:
3664 auth_alg = WLAN_AUTH_LEAP;
3665 break;
3666 case NL80211_AUTHTYPE_SAE:
3667 auth_alg = WLAN_AUTH_SAE;
3668 break;
3669 default:
3670 return -EOPNOTSUPP;
3671 }
3672
3673 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3674 req->ie_len, GFP_KERNEL);
3675 if (!auth_data)
3676 return -ENOMEM;
3677
3678 auth_data->bss = req->bss;
3679
3680 if (req->sae_data_len >= 4) {
3681 __le16 *pos = (__le16 *) req->sae_data;
3682 auth_data->sae_trans = le16_to_cpu(pos[0]);
3683 auth_data->sae_status = le16_to_cpu(pos[1]);
3684 memcpy(auth_data->data, req->sae_data + 4,
3685 req->sae_data_len - 4);
3686 auth_data->data_len += req->sae_data_len - 4;
3687 }
3688
3689 if (req->ie && req->ie_len) {
3690 memcpy(&auth_data->data[auth_data->data_len],
3691 req->ie, req->ie_len);
3692 auth_data->data_len += req->ie_len;
3693 }
3694
3695 if (req->key && req->key_len) {
3696 auth_data->key_len = req->key_len;
3697 auth_data->key_idx = req->key_idx;
3698 memcpy(auth_data->key, req->key, req->key_len);
3699 }
3700
3701 auth_data->algorithm = auth_alg;
3702
3703 /* try to authenticate/probe */
3704
3705 mutex_lock(&ifmgd->mtx);
3706
3707 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3708 ifmgd->assoc_data) {
3709 err = -EBUSY;
3710 goto err_free;
3711 }
3712
3713 if (ifmgd->auth_data)
3714 ieee80211_destroy_auth_data(sdata, false);
3715
3716 /* prep auth_data so we don't go into idle on disassoc */
3717 ifmgd->auth_data = auth_data;
3718
3719 if (ifmgd->associated)
3720 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3721
3722 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
3723
3724 err = ieee80211_prep_connection(sdata, req->bss, false);
3725 if (err)
3726 goto err_clear;
3727
3728 err = ieee80211_probe_auth(sdata);
3729 if (err) {
3730 sta_info_destroy_addr(sdata, req->bss->bssid);
3731 goto err_clear;
3732 }
3733
3734 /* hold our own reference */
3735 cfg80211_ref_bss(auth_data->bss);
3736 err = 0;
3737 goto out_unlock;
3738
3739 err_clear:
3740 memset(ifmgd->bssid, 0, ETH_ALEN);
3741 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3742 ifmgd->auth_data = NULL;
3743 err_free:
3744 kfree(auth_data);
3745 out_unlock:
3746 mutex_unlock(&ifmgd->mtx);
3747
3748 return err;
3749 }
3750
3751 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3752 struct cfg80211_assoc_request *req)
3753 {
3754 struct ieee80211_local *local = sdata->local;
3755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3756 struct ieee80211_bss *bss = (void *)req->bss->priv;
3757 struct ieee80211_mgd_assoc_data *assoc_data;
3758 struct ieee80211_supported_band *sband;
3759 const u8 *ssidie, *ht_ie;
3760 int i, err;
3761
3762 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3763 if (!assoc_data)
3764 return -ENOMEM;
3765
3766 rcu_read_lock();
3767 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3768 if (!ssidie) {
3769 rcu_read_unlock();
3770 kfree(assoc_data);
3771 return -EINVAL;
3772 }
3773 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3774 assoc_data->ssid_len = ssidie[1];
3775 rcu_read_unlock();
3776
3777 mutex_lock(&ifmgd->mtx);
3778
3779 if (ifmgd->associated)
3780 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3781
3782 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3783 err = -EBUSY;
3784 goto err_free;
3785 }
3786
3787 if (ifmgd->assoc_data) {
3788 err = -EBUSY;
3789 goto err_free;
3790 }
3791
3792 if (ifmgd->auth_data) {
3793 bool match;
3794
3795 /* keep sta info, bssid if matching */
3796 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
3797 ieee80211_destroy_auth_data(sdata, match);
3798 }
3799
3800 /* prepare assoc data */
3801
3802 ifmgd->beacon_crc_valid = false;
3803
3804 /*
3805 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3806 * We still associate in non-HT mode (11a/b/g) if any one of these
3807 * ciphers is configured as pairwise.
3808 * We can set this to true for non-11n hardware, that'll be checked
3809 * separately along with the peer capabilities.
3810 */
3811 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
3812 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3813 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3814 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
3815 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3816 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3817 netdev_info(sdata->dev,
3818 "disabling HT/VHT due to WEP/TKIP use\n");
3819 }
3820 }
3821
3822 if (req->flags & ASSOC_REQ_DISABLE_HT) {
3823 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3824 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3825 }
3826
3827 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3828 sband = local->hw.wiphy->bands[req->bss->channel->band];
3829 if (!sband->ht_cap.ht_supported ||
3830 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3831 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3832 if (!bss->wmm_used)
3833 netdev_info(sdata->dev,
3834 "disabling HT as WMM/QoS is not supported by the AP\n");
3835 }
3836
3837 /* disable VHT if we don't support it or the AP doesn't use WMM */
3838 if (!sband->vht_cap.vht_supported ||
3839 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3840 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3841 if (!bss->wmm_used)
3842 netdev_info(sdata->dev,
3843 "disabling VHT as WMM/QoS is not supported by the AP\n");
3844 }
3845
3846 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3847 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3848 sizeof(ifmgd->ht_capa_mask));
3849
3850 if (req->ie && req->ie_len) {
3851 memcpy(assoc_data->ie, req->ie, req->ie_len);
3852 assoc_data->ie_len = req->ie_len;
3853 }
3854
3855 assoc_data->bss = req->bss;
3856
3857 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3858 if (ifmgd->powersave)
3859 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
3860 else
3861 sdata->smps_mode = IEEE80211_SMPS_OFF;
3862 } else
3863 sdata->smps_mode = ifmgd->req_smps;
3864
3865 assoc_data->capability = req->bss->capability;
3866 assoc_data->wmm = bss->wmm_used &&
3867 (local->hw.queues >= IEEE80211_NUM_ACS);
3868 assoc_data->supp_rates = bss->supp_rates;
3869 assoc_data->supp_rates_len = bss->supp_rates_len;
3870
3871 rcu_read_lock();
3872 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3873 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3874 assoc_data->ap_ht_param =
3875 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3876 else
3877 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3878 rcu_read_unlock();
3879
3880 if (bss->wmm_used && bss->uapsd_supported &&
3881 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
3882 assoc_data->uapsd = true;
3883 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3884 } else {
3885 assoc_data->uapsd = false;
3886 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3887 }
3888
3889 if (req->prev_bssid)
3890 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
3891
3892 if (req->use_mfp) {
3893 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3894 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3895 } else {
3896 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3897 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3898 }
3899
3900 if (req->crypto.control_port)
3901 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3902 else
3903 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3904
3905 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3906 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3907
3908 /* kick off associate process */
3909
3910 ifmgd->assoc_data = assoc_data;
3911 ifmgd->dtim_period = 0;
3912
3913 err = ieee80211_prep_connection(sdata, req->bss, true);
3914 if (err)
3915 goto err_clear;
3916
3917 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3918 const struct cfg80211_bss_ies *beacon_ies;
3919
3920 rcu_read_lock();
3921 beacon_ies = rcu_dereference(req->bss->beacon_ies);
3922 if (!beacon_ies) {
3923 /*
3924 * Wait up to one beacon interval ...
3925 * should this be more if we miss one?
3926 */
3927 sdata_info(sdata, "waiting for beacon from %pM\n",
3928 ifmgd->bssid);
3929 assoc_data->timeout =
3930 TU_TO_EXP_TIME(req->bss->beacon_interval);
3931 } else {
3932 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3933 beacon_ies->data,
3934 beacon_ies->len);
3935 if (tim_ie && tim_ie[1] >=
3936 sizeof(struct ieee80211_tim_ie)) {
3937 const struct ieee80211_tim_ie *tim;
3938 tim = (void *)(tim_ie + 2);
3939 ifmgd->dtim_period = tim->dtim_period;
3940 }
3941 assoc_data->have_beacon = true;
3942 assoc_data->sent_assoc = false;
3943 assoc_data->timeout = jiffies;
3944 }
3945 rcu_read_unlock();
3946 } else {
3947 assoc_data->have_beacon = true;
3948 assoc_data->sent_assoc = false;
3949 assoc_data->timeout = jiffies;
3950 }
3951 run_again(ifmgd, assoc_data->timeout);
3952
3953 if (bss->corrupt_data) {
3954 char *corrupt_type = "data";
3955 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3956 if (bss->corrupt_data &
3957 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3958 corrupt_type = "beacon and probe response";
3959 else
3960 corrupt_type = "beacon";
3961 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3962 corrupt_type = "probe response";
3963 sdata_info(sdata, "associating with AP with corrupt %s\n",
3964 corrupt_type);
3965 }
3966
3967 err = 0;
3968 goto out;
3969 err_clear:
3970 memset(ifmgd->bssid, 0, ETH_ALEN);
3971 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3972 ifmgd->assoc_data = NULL;
3973 err_free:
3974 kfree(assoc_data);
3975 out:
3976 mutex_unlock(&ifmgd->mtx);
3977
3978 return err;
3979 }
3980
3981 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
3982 struct cfg80211_deauth_request *req)
3983 {
3984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3985 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3986 bool tx = !req->local_state_change;
3987 bool sent_frame = false;
3988
3989 mutex_lock(&ifmgd->mtx);
3990
3991 sdata_info(sdata,
3992 "deauthenticating from %pM by local choice (reason=%d)\n",
3993 req->bssid, req->reason_code);
3994
3995 if (ifmgd->auth_data) {
3996 drv_mgd_prepare_tx(sdata->local, sdata);
3997 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3998 IEEE80211_STYPE_DEAUTH,
3999 req->reason_code, tx,
4000 frame_buf);
4001 ieee80211_destroy_auth_data(sdata, false);
4002 mutex_unlock(&ifmgd->mtx);
4003
4004 sent_frame = tx;
4005 goto out;
4006 }
4007
4008 if (ifmgd->associated &&
4009 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4010 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4011 req->reason_code, tx, frame_buf);
4012 sent_frame = tx;
4013 }
4014 mutex_unlock(&ifmgd->mtx);
4015
4016 out:
4017 mutex_lock(&sdata->local->mtx);
4018 ieee80211_recalc_idle(sdata->local);
4019 mutex_unlock(&sdata->local->mtx);
4020
4021 if (sent_frame)
4022 __cfg80211_send_deauth(sdata->dev, frame_buf,
4023 IEEE80211_DEAUTH_FRAME_LEN);
4024
4025 return 0;
4026 }
4027
4028 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4029 struct cfg80211_disassoc_request *req)
4030 {
4031 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4032 u8 bssid[ETH_ALEN];
4033 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4034
4035 mutex_lock(&ifmgd->mtx);
4036
4037 /*
4038 * cfg80211 should catch this ... but it's racy since
4039 * we can receive a disassoc frame, process it, hand it
4040 * to cfg80211 while that's in a locked section already
4041 * trying to tell us that the user wants to disconnect.
4042 */
4043 if (ifmgd->associated != req->bss) {
4044 mutex_unlock(&ifmgd->mtx);
4045 return -ENOLINK;
4046 }
4047
4048 sdata_info(sdata,
4049 "disassociating from %pM by local choice (reason=%d)\n",
4050 req->bss->bssid, req->reason_code);
4051
4052 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4053 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4054 req->reason_code, !req->local_state_change,
4055 frame_buf);
4056 mutex_unlock(&ifmgd->mtx);
4057
4058 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4059 IEEE80211_DEAUTH_FRAME_LEN);
4060
4061 mutex_lock(&sdata->local->mtx);
4062 ieee80211_recalc_idle(sdata->local);
4063 mutex_unlock(&sdata->local->mtx);
4064
4065 return 0;
4066 }
4067
4068 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4069 {
4070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4071
4072 mutex_lock(&ifmgd->mtx);
4073 if (ifmgd->assoc_data)
4074 ieee80211_destroy_assoc_data(sdata, false);
4075 if (ifmgd->auth_data)
4076 ieee80211_destroy_auth_data(sdata, false);
4077 del_timer_sync(&ifmgd->timer);
4078 mutex_unlock(&ifmgd->mtx);
4079 }
4080
4081 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4082 enum nl80211_cqm_rssi_threshold_event rssi_event,
4083 gfp_t gfp)
4084 {
4085 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4086
4087 trace_api_cqm_rssi_notify(sdata, rssi_event);
4088
4089 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4090 }
4091 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux with added FPC-III support