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cfg80211: rework chandef checking and export it
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 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
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 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
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 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.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 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 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 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
391a200a
JM		 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
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
77fdaa12
JB		 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 */
97enum rx_mgmt_action {
98 /* no action required */
99 RX_MGMT_NONE,
100
77fdaa12
JB		 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,
66e67e41
JB		 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,
77fdaa12
JB		 115};
116
5484e237 117/* utils */
77fdaa12
JB		 118static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
119{
46a5ebaf 120 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 121}
122
ca386f31
JB		 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 */
66e67e41 133static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 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
d3a910a8 142void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 143{
c1288b12 144 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 145 return;
146
7eeff74c
JB		 147 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
148 return;
149
b291ba11 150 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 151 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 152}
153
be099e82
LR		 154void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
155{
0c699c3a
LR		 156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157
8628172f
SG		 158 if (unlikely(!sdata->u.mgd.associated))
159 return;
160
be099e82
LR		 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));
0c699c3a
LR		 166
167 ifmgd->probe_send_count = 0;
be099e82
LR		 168}
169
5484e237 170static int ecw2cw(int ecw)
60f8b39c 171{
5484e237 172 return (1 << ecw) - 1;
60f8b39c
JB		 173}
174
24398e39
JB		 175static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
176 struct ieee80211_ht_operation *ht_oper,
177 const u8 *bssid, bool reconfig)
d5522e03
JB		 178{
179 struct ieee80211_local *local = sdata->local;
180 struct ieee80211_supported_band *sband;
55de908a
JB		 181 struct ieee80211_chanctx_conf *chanctx_conf;
182 struct ieee80211_channel *chan;
d5522e03
JB		 183 struct sta_info *sta;
184 u32 changed = 0;
9ed6bcce 185 u16 ht_opmode;
64f68e5d 186 bool disable_40 = false;
d5522e03 187
55de908a
JB		 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 }
4bf88530 194 chan = chanctx_conf->def.chan;
55de908a
JB		 195 rcu_read_unlock();
196 sband = local->hw.wiphy->bands[chan->band];
d5522e03 197
4bf88530
JB		 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)
64f68e5d 203 disable_40 = true;
4bf88530
JB		 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)
64f68e5d
JB		 207 disable_40 = true;
208 break;
209 default:
210 break;
211 }
d5522e03 212
24398e39
JB		 213 /* This can change during the lifetime of the BSS */
214 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 215 disable_40 = true;
216
217 mutex_lock(&local->sta_mtx);
218 sta = sta_info_get(sdata, bssid);
d5522e03 219
64f68e5d
JB		 220 WARN_ON_ONCE(!sta);
221
222 if (sta && !sta->supports_40mhz)
223 disable_40 = true;
224
225 if (sta && (!reconfig ||
91a0099c 226 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 227 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 228
64f68e5d
JB		 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;
7cc44ed4 233
64f68e5d 234 rate_control_rate_update(local, sband, sta,
8f727ef3 235 IEEE80211_RC_BW_CHANGED);
0aaffa9b 236 }
64f68e5d 237 mutex_unlock(&local->sta_mtx);
d5522e03 238
074d46d1 239 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 240
241 /* if bss configuration changed store the new one */
24398e39 242 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 243 changed |= BSS_CHANGED_HT;
9ed6bcce 244 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 245 }
246
247 return changed;
248}
249
9c6bd790
JB		 250/* frame sending functions */
251
66e67e41
JB		 252static 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
273static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 274 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 275 struct ieee80211_supported_band *sband,
276 struct ieee80211_channel *channel,
277 enum ieee80211_smps_mode smps)
278{
66e67e41
JB		 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
66e67e41
JB		 286 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
287 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
288
66e67e41
JB		 289 /* determine capability flags */
290 cap = ht_cap.cap;
291
9dde6423 292 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 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
24398e39
JB		 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
66e67e41
JB		 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
d545daba
MP		 342static 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 /* reserve and fill IE */
d4950281 358 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 359 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
360}
361
66e67e41
JB		 362static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
363{
364 struct ieee80211_local *local = sdata->local;
365 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
366 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
367 struct sk_buff *skb;
368 struct ieee80211_mgmt *mgmt;
369 u8 *pos, qos_info;
370 size_t offset = 0, noffset;
371 int i, count, rates_len, supp_rates_len;
372 u16 capab;
373 struct ieee80211_supported_band *sband;
55de908a
JB		 374 struct ieee80211_chanctx_conf *chanctx_conf;
375 struct ieee80211_channel *chan;
66e67e41 376 u32 rates = 0;
66e67e41
JB		 377
378 lockdep_assert_held(&ifmgd->mtx);
379
55de908a
JB		 380 rcu_read_lock();
381 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
382 if (WARN_ON(!chanctx_conf)) {
383 rcu_read_unlock();
384 return;
385 }
4bf88530 386 chan = chanctx_conf->def.chan;
55de908a
JB		 387 rcu_read_unlock();
388 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 389
390 if (assoc_data->supp_rates_len) {
391 /*
392 * Get all rates supported by the device and the AP as
393 * some APs don't like getting a superset of their rates
394 * in the association request (e.g. D-Link DAP 1353 in
395 * b-only mode)...
396 */
397 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
398 assoc_data->supp_rates_len,
399 sband, &rates);
400 } else {
401 /*
402 * In case AP not provide any supported rates information
403 * before association, we send information element(s) with
404 * all rates that we support.
405 */
406 rates = ~0;
407 rates_len = sband->n_bitrates;
408 }
409
410 skb = alloc_skb(local->hw.extra_tx_headroom +
411 sizeof(*mgmt) + /* bit too much but doesn't matter */
412 2 + assoc_data->ssid_len + /* SSID */
413 4 + rates_len + /* (extended) rates */
414 4 + /* power capability */
415 2 + 2 * sband->n_channels + /* supported channels */
416 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 417 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 418 assoc_data->ie_len + /* extra IEs */
419 9, /* WMM */
420 GFP_KERNEL);
421 if (!skb)
422 return;
423
424 skb_reserve(skb, local->hw.extra_tx_headroom);
425
426 capab = WLAN_CAPABILITY_ESS;
427
428 if (sband->band == IEEE80211_BAND_2GHZ) {
429 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
430 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
431 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
432 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
433 }
434
435 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
436 capab |= WLAN_CAPABILITY_PRIVACY;
437
438 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
439 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
440 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
441
442 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
443 memset(mgmt, 0, 24);
444 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
445 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
446 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
447
448 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
449 skb_put(skb, 10);
450 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
451 IEEE80211_STYPE_REASSOC_REQ);
452 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
453 mgmt->u.reassoc_req.listen_interval =
454 cpu_to_le16(local->hw.conf.listen_interval);
455 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
456 ETH_ALEN);
457 } else {
458 skb_put(skb, 4);
459 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
460 IEEE80211_STYPE_ASSOC_REQ);
461 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
462 mgmt->u.assoc_req.listen_interval =
463 cpu_to_le16(local->hw.conf.listen_interval);
464 }
465
466 /* SSID */
467 pos = skb_put(skb, 2 + assoc_data->ssid_len);
468 *pos++ = WLAN_EID_SSID;
469 *pos++ = assoc_data->ssid_len;
470 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
471
472 /* add all rates which were marked to be used above */
473 supp_rates_len = rates_len;
474 if (supp_rates_len > 8)
475 supp_rates_len = 8;
476
477 pos = skb_put(skb, supp_rates_len + 2);
478 *pos++ = WLAN_EID_SUPP_RATES;
479 *pos++ = supp_rates_len;
480
481 count = 0;
482 for (i = 0; i < sband->n_bitrates; i++) {
483 if (BIT(i) & rates) {
484 int rate = sband->bitrates[i].bitrate;
485 *pos++ = (u8) (rate / 5);
486 if (++count == 8)
487 break;
488 }
489 }
490
491 if (rates_len > count) {
492 pos = skb_put(skb, rates_len - count + 2);
493 *pos++ = WLAN_EID_EXT_SUPP_RATES;
494 *pos++ = rates_len - count;
495
496 for (i++; i < sband->n_bitrates; i++) {
497 if (BIT(i) & rates) {
498 int rate = sband->bitrates[i].bitrate;
499 *pos++ = (u8) (rate / 5);
500 }
501 }
502 }
503
504 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
505 /* 1. power capabilities */
506 pos = skb_put(skb, 4);
507 *pos++ = WLAN_EID_PWR_CAPABILITY;
508 *pos++ = 2;
509 *pos++ = 0; /* min tx power */
55de908a 510 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 511
512 /* 2. supported channels */
513 /* TODO: get this in reg domain format */
514 pos = skb_put(skb, 2 * sband->n_channels + 2);
515 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
516 *pos++ = 2 * sband->n_channels;
517 for (i = 0; i < sband->n_channels; i++) {
518 *pos++ = ieee80211_frequency_to_channel(
519 sband->channels[i].center_freq);
520 *pos++ = 1; /* one channel in the subband*/
521 }
522 }
523
524 /* if present, add any custom IEs that go before HT */
525 if (assoc_data->ie_len && assoc_data->ie) {
526 static const u8 before_ht[] = {
527 WLAN_EID_SSID,
528 WLAN_EID_SUPP_RATES,
529 WLAN_EID_EXT_SUPP_RATES,
530 WLAN_EID_PWR_CAPABILITY,
531 WLAN_EID_SUPPORTED_CHANNELS,
532 WLAN_EID_RSN,
533 WLAN_EID_QOS_CAPA,
534 WLAN_EID_RRM_ENABLED_CAPABILITIES,
535 WLAN_EID_MOBILITY_DOMAIN,
536 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
537 };
538 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
539 before_ht, ARRAY_SIZE(before_ht),
540 offset);
541 pos = skb_put(skb, noffset - offset);
542 memcpy(pos, assoc_data->ie + offset, noffset - offset);
543 offset = noffset;
544 }
545
a8243b72 546 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 547 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 548 sband, chan, sdata->smps_mode);
66e67e41 549
d545daba
MP		 550 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
551 ieee80211_add_vht_ie(sdata, skb, sband);
552
66e67e41
JB		 553 /* if present, add any custom non-vendor IEs that go after HT */
554 if (assoc_data->ie_len && assoc_data->ie) {
555 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
556 assoc_data->ie_len,
557 offset);
558 pos = skb_put(skb, noffset - offset);
559 memcpy(pos, assoc_data->ie + offset, noffset - offset);
560 offset = noffset;
561 }
562
76f0303d
JB		 563 if (assoc_data->wmm) {
564 if (assoc_data->uapsd) {
dc41e4d4
EP		 565 qos_info = ifmgd->uapsd_queues;
566 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 567 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
568 } else {
569 qos_info = 0;
570 }
571
572 pos = skb_put(skb, 9);
573 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
574 *pos++ = 7; /* len */
575 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
576 *pos++ = 0x50;
577 *pos++ = 0xf2;
578 *pos++ = 2; /* WME */
579 *pos++ = 0; /* WME info */
580 *pos++ = 1; /* WME ver */
581 *pos++ = qos_info;
582 }
583
584 /* add any remaining custom (i.e. vendor specific here) IEs */
585 if (assoc_data->ie_len && assoc_data->ie) {
586 noffset = assoc_data->ie_len;
587 pos = skb_put(skb, noffset - offset);
588 memcpy(pos, assoc_data->ie + offset, noffset - offset);
589 }
590
a1845fc7
JB		 591 drv_mgd_prepare_tx(local, sdata);
592
66e67e41
JB		 593 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
594 ieee80211_tx_skb(sdata, skb);
595}
596
572e0012
KV		 597void ieee80211_send_pspoll(struct ieee80211_local *local,
598 struct ieee80211_sub_if_data *sdata)
599{
572e0012
KV		 600 struct ieee80211_pspoll *pspoll;
601 struct sk_buff *skb;
572e0012 602
d8cd189e
KV		 603 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
604 if (!skb)
572e0012 605 return;
572e0012 606
d8cd189e
KV		 607 pspoll = (struct ieee80211_pspoll *) skb->data;
608 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 609
62ae67be
JB		 610 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
611 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 612}
613
965bedad
JB		 614void ieee80211_send_nullfunc(struct ieee80211_local *local,
615 struct ieee80211_sub_if_data *sdata,
616 int powersave)
617{
618 struct sk_buff *skb;
d8cd189e 619 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 621
d8cd189e
KV		 622 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
623 if (!skb)
965bedad 624 return;
965bedad 625
d8cd189e 626 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 627 if (powersave)
d8cd189e 628 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 629
62ae67be 630 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 631 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
632 IEEE80211_STA_CONNECTION_POLL))
633 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
634
62ae67be 635 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 636}
637
d524215f
FF		 638static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
639 struct ieee80211_sub_if_data *sdata)
640{
641 struct sk_buff *skb;
642 struct ieee80211_hdr *nullfunc;
643 __le16 fc;
644
645 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
646 return;
647
648 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 649 if (!skb)
d524215f 650 return;
d15b8459 651
d524215f
FF		 652 skb_reserve(skb, local->hw.extra_tx_headroom);
653
654 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
655 memset(nullfunc, 0, 30);
656 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
657 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
658 nullfunc->frame_control = fc;
659 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
660 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
661 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
662 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
663
664 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
665 ieee80211_tx_skb(sdata, skb);
666}
667
cc32abd4
JB		 668/* spectrum management related things */
669static void ieee80211_chswitch_work(struct work_struct *work)
670{
671 struct ieee80211_sub_if_data *sdata =
672 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 673 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
674
9607e6b6 675 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 676 return;
677
77fdaa12
JB		 678 mutex_lock(&ifmgd->mtx);
679 if (!ifmgd->associated)
680 goto out;
cc32abd4 681
55de908a 682 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 683 if (!sdata->local->ops->channel_switch) {
684 /* call "hw_config" only if doing sw channel switch */
685 ieee80211_hw_config(sdata->local,
686 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 687 } else {
688 /* update the device channel directly */
55de908a 689 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 690 }
77fdaa12 691
cc32abd4 692 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 693 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 694
57eebdf3 695 /* XXX: wait for a beacon first? */
cc32abd4
JB		 696 ieee80211_wake_queues_by_reason(&sdata->local->hw,
697 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 698 out:
699 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
700 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 701}
702
5ce6e438
JB		 703void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
704{
55de908a
JB		 705 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
706 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 707
708 trace_api_chswitch_done(sdata, success);
709 if (!success) {
882a7c69
JB		 710 sdata_info(sdata,
711 "driver channel switch failed, disconnecting\n");
712 ieee80211_queue_work(&sdata->local->hw,
713 &ifmgd->csa_connection_drop_work);
714 } else {
715 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 716 }
5ce6e438
JB		 717}
718EXPORT_SYMBOL(ieee80211_chswitch_done);
719
cc32abd4
JB		 720static void ieee80211_chswitch_timer(unsigned long data)
721{
722 struct ieee80211_sub_if_data *sdata =
723 (struct ieee80211_sub_if_data *) data;
724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
725
5bb644a0
JB		 726 if (sdata->local->quiescing) {
727 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
728 return;
729 }
730
42935eca 731 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 732}
733
734void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
735 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 736 struct ieee80211_bss *bss,
737 u64 timestamp)
cc32abd4 738{
0c1ad2ca
JB		 739 struct cfg80211_bss *cbss =
740 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 741 struct ieee80211_channel *new_ch;
742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 743 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
744 cbss->channel->band);
55de908a 745 struct ieee80211_chanctx *chanctx;
cc32abd4 746
77fdaa12
JB		 747 ASSERT_MGD_MTX(ifmgd);
748
749 if (!ifmgd->associated)
cc32abd4
JB		 750 return;
751
fbe9c429 752 if (sdata->local->scanning)
cc32abd4
JB		 753 return;
754
755 /* Disregard subsequent beacons if we are already running a timer
756 processing a CSA */
757
758 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
759 return;
760
761 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 762 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
763 sdata_info(sdata,
764 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
765 ifmgd->associated->bssid, new_freq);
766 ieee80211_queue_work(&sdata->local->hw,
767 &ifmgd->csa_connection_drop_work);
cc32abd4 768 return;
882a7c69 769 }
cc32abd4 770
57eebdf3
JB		 771 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
772
55de908a
JB		 773 if (sdata->local->use_chanctx) {
774 sdata_info(sdata,
775 "not handling channel switch with channel contexts\n");
776 ieee80211_queue_work(&sdata->local->hw,
777 &ifmgd->csa_connection_drop_work);
778 }
779
780 mutex_lock(&sdata->local->chanctx_mtx);
781 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
782 mutex_unlock(&sdata->local->chanctx_mtx);
783 return;
784 }
785 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
786 struct ieee80211_chanctx, conf);
787 if (chanctx->refcount > 1) {
788 sdata_info(sdata,
789 "channel switch with multiple interfaces on the same channel, disconnecting\n");
790 ieee80211_queue_work(&sdata->local->hw,
791 &ifmgd->csa_connection_drop_work);
792 mutex_unlock(&sdata->local->chanctx_mtx);
793 return;
794 }
795 mutex_unlock(&sdata->local->chanctx_mtx);
796
797 sdata->local->csa_channel = new_ch;
798
57eebdf3
JB		 799 if (sw_elem->mode)
800 ieee80211_stop_queues_by_reason(&sdata->local->hw,
801 IEEE80211_QUEUE_STOP_REASON_CSA);
802
5ce6e438
JB		 803 if (sdata->local->ops->channel_switch) {
804 /* use driver's channel switch callback */
57eebdf3
JB		 805 struct ieee80211_channel_switch ch_switch = {
806 .timestamp = timestamp,
807 .block_tx = sw_elem->mode,
808 .channel = new_ch,
809 .count = sw_elem->count,
810 };
811
5ce6e438
JB		 812 drv_channel_switch(sdata->local, &ch_switch);
813 return;
814 }
815
816 /* channel switch handled in software */
57eebdf3 817 if (sw_elem->count <= 1)
42935eca 818 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 819 else
cc32abd4 820 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 821 TU_TO_EXP_TIME(sw_elem->count *
822 cbss->beacon_interval));
cc32abd4
JB		 823}
824
1ea6f9c0
JB		 825static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
826 struct ieee80211_channel *channel,
827 const u8 *country_ie, u8 country_ie_len,
828 const u8 *pwr_constr_elem)
cc32abd4 829{
04b7b2ff
JB		 830 struct ieee80211_country_ie_triplet *triplet;
831 int chan = ieee80211_frequency_to_channel(channel->center_freq);
832 int i, chan_pwr, chan_increment, new_ap_level;
833 bool have_chan_pwr = false;
cc32abd4 834
04b7b2ff
JB		 835 /* Invalid IE */
836 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 837 return 0;
cc32abd4 838
04b7b2ff
JB		 839 triplet = (void *)(country_ie + 3);
840 country_ie_len -= 3;
841
842 switch (channel->band) {
843 default:
844 WARN_ON_ONCE(1);
845 /* fall through */
846 case IEEE80211_BAND_2GHZ:
847 case IEEE80211_BAND_60GHZ:
848 chan_increment = 1;
849 break;
850 case IEEE80211_BAND_5GHZ:
851 chan_increment = 4;
852 break;
cc32abd4 853 }
04b7b2ff
JB		 854
855 /* find channel */
856 while (country_ie_len >= 3) {
857 u8 first_channel = triplet->chans.first_channel;
858
859 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
860 goto next;
861
862 for (i = 0; i < triplet->chans.num_channels; i++) {
863 if (first_channel + i * chan_increment == chan) {
864 have_chan_pwr = true;
865 chan_pwr = triplet->chans.max_power;
866 break;
867 }
868 }
869 if (have_chan_pwr)
870 break;
871
872 next:
873 triplet++;
874 country_ie_len -= 3;
875 }
876
877 if (!have_chan_pwr)
1ea6f9c0 878 return 0;
04b7b2ff
JB		 879
880 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
881
1ea6f9c0
JB		 882 if (sdata->ap_power_level == new_ap_level)
883 return 0;
04b7b2ff
JB		 884
885 sdata_info(sdata,
886 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
887 new_ap_level, chan_pwr, *pwr_constr_elem,
888 sdata->u.mgd.bssid);
1ea6f9c0
JB		 889 sdata->ap_power_level = new_ap_level;
890 if (__ieee80211_recalc_txpower(sdata))
891 return BSS_CHANGED_TXPOWER;
892 return 0;
cc32abd4
JB		 893}
894
f90754c1
JO		 895void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
896{
897 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
898 struct ieee80211_local *local = sdata->local;
899 struct ieee80211_conf *conf = &local->hw.conf;
900
901 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
902 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
903 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
904
905 local->disable_dynamic_ps = false;
906 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
907}
908EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
909
910void ieee80211_disable_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 = true;
921 conf->dynamic_ps_timeout = 0;
922 del_timer_sync(&local->dynamic_ps_timer);
923 ieee80211_queue_work(&local->hw,
924 &local->dynamic_ps_enable_work);
925}
926EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
927
965bedad
JB		 928/* powersave */
929static void ieee80211_enable_ps(struct ieee80211_local *local,
930 struct ieee80211_sub_if_data *sdata)
931{
932 struct ieee80211_conf *conf = &local->hw.conf;
933
d5edaedc
JB		 934 /*
935 * If we are scanning right now then the parameters will
936 * take effect when scan finishes.
937 */
fbe9c429 938 if (local->scanning)
d5edaedc
JB		 939 return;
940
965bedad
JB		 941 if (conf->dynamic_ps_timeout > 0 &&
942 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
943 mod_timer(&local->dynamic_ps_timer, jiffies +
944 msecs_to_jiffies(conf->dynamic_ps_timeout));
945 } else {
946 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
947 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 948
2a13052f
JO		 949 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
950 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
951 return;
952
953 conf->flags |= IEEE80211_CONF_PS;
954 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 955 }
956}
957
958static void ieee80211_change_ps(struct ieee80211_local *local)
959{
960 struct ieee80211_conf *conf = &local->hw.conf;
961
962 if (local->ps_sdata) {
965bedad
JB		 963 ieee80211_enable_ps(local, local->ps_sdata);
964 } else if (conf->flags & IEEE80211_CONF_PS) {
965 conf->flags &= ~IEEE80211_CONF_PS;
966 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
967 del_timer_sync(&local->dynamic_ps_timer);
968 cancel_work_sync(&local->dynamic_ps_enable_work);
969 }
970}
971
808118cb
JY		 972static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
973{
974 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
975 struct sta_info *sta = NULL;
c2c98fde 976 bool authorized = false;
808118cb
JY		 977
978 if (!mgd->powersave)
979 return false;
980
05cb9108
JB		 981 if (mgd->broken_ap)
982 return false;
983
808118cb
JY		 984 if (!mgd->associated)
985 return false;
986
808118cb
JY		 987 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
988 IEEE80211_STA_CONNECTION_POLL))
989 return false;
990
991 rcu_read_lock();
992 sta = sta_info_get(sdata, mgd->bssid);
993 if (sta)
c2c98fde 994 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 995 rcu_read_unlock();
996
c2c98fde 997 return authorized;
808118cb
JY		 998}
999
965bedad 1000/* need to hold RTNL or interface lock */
10f644a4 1001void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1002{
1003 struct ieee80211_sub_if_data *sdata, *found = NULL;
1004 int count = 0;
195e294d 1005 int timeout;
965bedad
JB		 1006
1007 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1008 local->ps_sdata = NULL;
1009 return;
1010 }
1011
1012 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1013 if (!ieee80211_sdata_running(sdata))
965bedad 1014 continue;
8c7914de
RM		 1015 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1016 /* If an AP vif is found, then disable PS
1017 * by setting the count to zero thereby setting
1018 * ps_sdata to NULL.
1019 */
1020 count = 0;
1021 break;
1022 }
965bedad
JB		 1023 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1024 continue;
1025 found = sdata;
1026 count++;
1027 }
1028
808118cb 1029 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1030 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1031 s32 beaconint_us;
1032
1033 if (latency < 0)
ed77134b 1034 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1035
1036 beaconint_us = ieee80211_tu_to_usec(
1037 found->vif.bss_conf.beacon_int);
1038
ff616381 1039 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1040 if (timeout < 0) {
1041 /*
ff616381
JO		 1042 * Go to full PSM if the user configures a very low
1043 * latency requirement.
0ab82b04
EP		 1044 * The 2000 second value is there for compatibility
1045 * until the PM_QOS_NETWORK_LATENCY is configured
1046 * with real values.
195e294d 1047 */
0ab82b04
EP		 1048 if (latency > (1900 * USEC_PER_MSEC) &&
1049 latency != (2000 * USEC_PER_SEC))
195e294d 1050 timeout = 0;
ff616381
JO		 1051 else
1052 timeout = 100;
195e294d 1053 }
f90754c1
JO		 1054 local->dynamic_ps_user_timeout = timeout;
1055 if (!local->disable_dynamic_ps)
1056 conf->dynamic_ps_timeout =
1057 local->dynamic_ps_user_timeout;
195e294d 1058
04fe2037 1059 if (beaconint_us > latency) {
10f644a4 1060 local->ps_sdata = NULL;
04fe2037 1061 } else {
56007a02 1062 struct ieee80211_bss *bss;
04fe2037 1063 int maxslp = 1;
56007a02 1064 u8 dtimper;
04fe2037 1065
56007a02
JB		 1066 bss = (void *)found->u.mgd.associated->priv;
1067 dtimper = bss->dtim_period;
1068
1069 /* If the TIM IE is invalid, pretend the value is 1 */
1070 if (!dtimper)
1071 dtimper = 1;
1072 else if (dtimper > 1)
04fe2037
JB		 1073 maxslp = min_t(int, dtimper,
1074 latency / beaconint_us);
1075
9ccebe61 1076 local->hw.conf.max_sleep_period = maxslp;
56007a02 1077 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1078 local->ps_sdata = found;
04fe2037 1079 }
10f644a4 1080 } else {
965bedad 1081 local->ps_sdata = NULL;
10f644a4 1082 }
965bedad
JB		 1083
1084 ieee80211_change_ps(local);
1085}
1086
ab095877
EP		 1087void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1088{
1089 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1090
1091 if (sdata->vif.bss_conf.ps != ps_allowed) {
1092 sdata->vif.bss_conf.ps = ps_allowed;
1093 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1094 }
1095}
1096
965bedad
JB		 1097void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1098{
1099 struct ieee80211_local *local =
1100 container_of(work, struct ieee80211_local,
1101 dynamic_ps_disable_work);
1102
1103 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1104 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1105 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1106 }
1107
1108 ieee80211_wake_queues_by_reason(&local->hw,
1109 IEEE80211_QUEUE_STOP_REASON_PS);
1110}
1111
1112void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1113{
1114 struct ieee80211_local *local =
1115 container_of(work, struct ieee80211_local,
1116 dynamic_ps_enable_work);
1117 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1118 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1119 unsigned long flags;
1120 int q;
965bedad
JB		 1121
1122 /* can only happen when PS was just disabled anyway */
1123 if (!sdata)
1124 return;
1125
5e34069c
CL		 1126 ifmgd = &sdata->u.mgd;
1127
965bedad
JB		 1128 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1129 return;
1130
77b7023a
AN		 1131 if (!local->disable_dynamic_ps &&
1132 local->hw.conf.dynamic_ps_timeout > 0) {
1133 /* don't enter PS if TX frames are pending */
1134 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1135 mod_timer(&local->dynamic_ps_timer, jiffies +
1136 msecs_to_jiffies(
1137 local->hw.conf.dynamic_ps_timeout));
1138 return;
1139 }
77b7023a
AN		 1140
1141 /*
1142 * transmission can be stopped by others which leads to
1143 * dynamic_ps_timer expiry. Postpone the ps timer if it
1144 * is not the actual idle state.
1145 */
1146 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1147 for (q = 0; q < local->hw.queues; q++) {
1148 if (local->queue_stop_reasons[q]) {
1149 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1150 flags);
1151 mod_timer(&local->dynamic_ps_timer, jiffies +
1152 msecs_to_jiffies(
1153 local->hw.conf.dynamic_ps_timeout));
1154 return;
1155 }
1156 }
1157 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1158 }
1ddc2867 1159
375177bf 1160 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1161 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1162 netif_tx_stop_all_queues(sdata->dev);
965bedad 1163
e8306f98
VN		 1164 if (drv_tx_frames_pending(local))
1165 mod_timer(&local->dynamic_ps_timer, jiffies +
1166 msecs_to_jiffies(
1167 local->hw.conf.dynamic_ps_timeout));
1168 else {
1169 ieee80211_send_nullfunc(local, sdata, 1);
1170 /* Flush to get the tx status of nullfunc frame */
1171 drv_flush(local, false);
1172 }
f3e85b9e
VN		 1173 }
1174
2a13052f
JO		 1175 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1176 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1177 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1178 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1179 local->hw.conf.flags |= IEEE80211_CONF_PS;
1180 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1181 }
f3e85b9e 1182
77b7023a
AN		 1183 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1184 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1185}
1186
1187void ieee80211_dynamic_ps_timer(unsigned long data)
1188{
1189 struct ieee80211_local *local = (void *) data;
1190
78f1a8b7 1191 if (local->quiescing || local->suspended)
5bb644a0
JB		 1192 return;
1193
42935eca 1194 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1195}
1196
60f8b39c 1197/* MLME */
7d25745d 1198static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1199 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1200 u8 *wmm_param, size_t wmm_param_len)
1201{
f0706e82 1202 struct ieee80211_tx_queue_params params;
4ced3f74 1203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1204 size_t left;
1205 int count;
ab13315a 1206 u8 *pos, uapsd_queues = 0;
f0706e82 1207
e1b3ec1a 1208 if (!local->ops->conf_tx)
7d25745d 1209 return false;
e1b3ec1a 1210
32c5057b 1211 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1212 return false;
3434fbd3
JB		 1213
1214 if (!wmm_param)
7d25745d 1215 return false;
3434fbd3 1216
f0706e82 1217 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1218 return false;
ab13315a
KV		 1219
1220 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1221 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1222
f0706e82 1223 count = wmm_param[6] & 0x0f;
46900298 1224 if (count == ifmgd->wmm_last_param_set)
7d25745d 1225 return false;
46900298 1226 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1227
1228 pos = wmm_param + 8;
1229 left = wmm_param_len - 8;
1230
1231 memset(&params, 0, sizeof(params));
1232
00e96dec 1233 sdata->wmm_acm = 0;
f0706e82
JB		 1234 for (; left >= 4; left -= 4, pos += 4) {
1235 int aci = (pos[0] >> 5) & 0x03;
1236 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1237 bool uapsd = false;
f0706e82
JB		 1238 int queue;
1239
1240 switch (aci) {
0eeb59fe 1241 case 1: /* AC_BK */
e100bb64 1242 queue = 3;
988c0f72 1243 if (acm)
00e96dec 1244 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1245 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1246 uapsd = true;
f0706e82 1247 break;
0eeb59fe 1248 case 2: /* AC_VI */
e100bb64 1249 queue = 1;
988c0f72 1250 if (acm)
00e96dec 1251 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1252 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1253 uapsd = true;
f0706e82 1254 break;
0eeb59fe 1255 case 3: /* AC_VO */
e100bb64 1256 queue = 0;
988c0f72 1257 if (acm)
00e96dec 1258 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1259 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1260 uapsd = true;
f0706e82 1261 break;
0eeb59fe 1262 case 0: /* AC_BE */
f0706e82 1263 default:
e100bb64 1264 queue = 2;
988c0f72 1265 if (acm)
00e96dec 1266 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1267 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1268 uapsd = true;
f0706e82
JB		 1269 break;
1270 }
1271
1272 params.aifs = pos[0] & 0x0f;
1273 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1274 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1275 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1276 params.uapsd = uapsd;
1277
bdcbd8e0
JB		 1278 mlme_dbg(sdata,
1279 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1280 queue, aci, acm,
1281 params.aifs, params.cw_min, params.cw_max,
1282 params.txop, params.uapsd);
f6f3def3
EP		 1283 sdata->tx_conf[queue] = params;
1284 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1285 sdata_err(sdata,
1286 "failed to set TX queue parameters for queue %d\n",
1287 queue);
f0706e82 1288 }
e1b3ec1a
SG		 1289
1290 /* enable WMM or activate new settings */
4ced3f74 1291 sdata->vif.bss_conf.qos = true;
7d25745d 1292 return true;
f0706e82
JB		 1293}
1294
925e64c3
SG		 1295static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1296{
1297 lockdep_assert_held(&sdata->local->mtx);
1298
1299 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1300 IEEE80211_STA_BEACON_POLL);
1301 ieee80211_run_deferred_scan(sdata->local);
1302}
1303
1304static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1305{
1306 mutex_lock(&sdata->local->mtx);
1307 __ieee80211_stop_poll(sdata);
1308 mutex_unlock(&sdata->local->mtx);
1309}
1310
7a5158ef
JB		 1311static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1312 u16 capab, bool erp_valid, u8 erp)
5628221c 1313{
bda3933a 1314 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1315 u32 changed = 0;
7a5158ef
JB		 1316 bool use_protection;
1317 bool use_short_preamble;
1318 bool use_short_slot;
1319
1320 if (erp_valid) {
1321 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1322 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1323 } else {
1324 use_protection = false;
1325 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1326 }
1327
1328 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1329 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1330 use_short_slot = true;
5628221c 1331
471b3efd 1332 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1333 bss_conf->use_cts_prot = use_protection;
1334 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1335 }
7e9ed188 1336
d43c7b37 1337 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1338 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1339 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1340 }
d9430a32 1341
7a5158ef 1342 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1343 bss_conf->use_short_slot = use_short_slot;
1344 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1345 }
1346
1347 return changed;
1348}
1349
f698d856 1350static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1351 struct cfg80211_bss *cbss,
ae5eb026 1352 u32 bss_info_changed)
f0706e82 1353{
0c1ad2ca 1354 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1355 struct ieee80211_local *local = sdata->local;
68542962 1356 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1357
ae5eb026 1358 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1359 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1360 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1361
7ccc8bd7
FF		 1362 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1363 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1364
0c1ad2ca
JB		 1365 sdata->u.mgd.associated = cbss;
1366 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1367
17e4ec14
JM		 1368 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1369
488dd7b5
JB		 1370 if (sdata->vif.p2p) {
1371 u8 noa[2];
1372 int ret;
1373
1374 ret = cfg80211_get_p2p_attr(cbss->information_elements,
1375 cbss->len_information_elements,
1376 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1377 noa, sizeof(noa));
1378 if (ret >= 2) {
1379 bss_conf->p2p_oppps = noa[1] & 0x80;
1380 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1381 bss_info_changed |= BSS_CHANGED_P2P_PS;
1382 sdata->u.mgd.p2p_noa_index = noa[0];
1383 }
1384 }
1385
b291ba11 1386 /* just to be sure */
925e64c3 1387 ieee80211_stop_poll(sdata);
b291ba11 1388
9ac19a90 1389 ieee80211_led_assoc(local, 1);
9306102e 1390
e5b900d2
JB		 1391 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1392 bss_conf->dtim_period = bss->dtim_period;
1393 else
1394 bss_conf->dtim_period = 0;
1395
68542962 1396 bss_conf->assoc = 1;
9cef8737 1397
a97c13c3 1398 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1399 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1400 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1401 bss_info_changed |= BSS_CHANGED_CQM;
1402
68542962
JO		 1403 /* Enable ARP filtering */
1404 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1405 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1406 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1407 }
1408
ae5eb026 1409 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1410
056508dc
JB		 1411 mutex_lock(&local->iflist_mtx);
1412 ieee80211_recalc_ps(local, -1);
1413 mutex_unlock(&local->iflist_mtx);
e0cb686f 1414
04ecd257 1415 ieee80211_recalc_smps(sdata);
ab095877
EP		 1416 ieee80211_recalc_ps_vif(sdata);
1417
8a5b33f5 1418 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1419 netif_carrier_on(sdata->dev);
f0706e82
JB		 1420}
1421
e69e95db 1422static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1423 u16 stype, u16 reason, bool tx,
1424 u8 *frame_buf)
aa458d17 1425{
46900298 1426 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1427 struct ieee80211_local *local = sdata->local;
1428 struct sta_info *sta;
3cc5240b 1429 u32 changed = 0;
aa458d17 1430
77fdaa12
JB		 1431 ASSERT_MGD_MTX(ifmgd);
1432
37ad3888
JB		 1433 if (WARN_ON_ONCE(tx && !frame_buf))
1434 return;
1435
b291ba11
JB		 1436 if (WARN_ON(!ifmgd->associated))
1437 return;
1438
79543d8e
DS		 1439 ieee80211_stop_poll(sdata);
1440
77fdaa12 1441 ifmgd->associated = NULL;
77fdaa12
JB		 1442
1443 /*
1444 * we need to commit the associated = NULL change because the
1445 * scan code uses that to determine whether this iface should
1446 * go to/wake up from powersave or not -- and could otherwise
1447 * wake the queues erroneously.
1448 */
1449 smp_mb();
1450
1451 /*
1452 * Thus, we can only afterwards stop the queues -- to account
1453 * for the case where another CPU is finishing a scan at this
1454 * time -- we don't want the scan code to enable queues.
1455 */
aa458d17 1456
8a5b33f5 1457 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1458 netif_carrier_off(sdata->dev);
1459
2a419056 1460 mutex_lock(&local->sta_mtx);
88a9e31c 1461 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1462 if (sta) {
c2c98fde 1463 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
7f161146 1464 ieee80211_sta_tear_down_BA_sessions(sta, false);
4cad6c7c 1465 }
2a419056 1466 mutex_unlock(&local->sta_mtx);
aa458d17 1467
88bc40e8
EP		 1468 /*
1469 * if we want to get out of ps before disassoc (why?) we have
1470 * to do it before sending disassoc, as otherwise the null-packet
1471 * won't be valid.
1472 */
1473 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1474 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1475 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1476 }
1477 local->ps_sdata = NULL;
1478
ab095877
EP		 1479 /* disable per-vif ps */
1480 ieee80211_recalc_ps_vif(sdata);
1481
f823981e
EP		 1482 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1483 if (tx)
1484 drv_flush(local, false);
1485
37ad3888
JB		 1486 /* deauthenticate/disassociate now */
1487 if (tx || frame_buf)
88a9e31c
EP		 1488 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1489 reason, tx, frame_buf);
37ad3888
JB		 1490
1491 /* flush out frame */
1492 if (tx)
1493 drv_flush(local, false);
1494
88a9e31c
EP		 1495 /* clear bssid only after building the needed mgmt frames */
1496 memset(ifmgd->bssid, 0, ETH_ALEN);
1497
37ad3888
JB		 1498 /* remove AP and TDLS peers */
1499 sta_info_flush(local, sdata);
1500
1501 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1502 changed |= ieee80211_reset_erp_info(sdata);
1503
f5e5bf25 1504 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1505 changed |= BSS_CHANGED_ASSOC;
1506 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1507
488dd7b5
JB		 1508 sdata->vif.bss_conf.p2p_ctwindow = 0;
1509 sdata->vif.bss_conf.p2p_oppps = false;
1510
413ad50a 1511 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1512 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1513 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1514
1ea6f9c0 1515 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1516
520eb820
KV		 1517 del_timer_sync(&local->dynamic_ps_timer);
1518 cancel_work_sync(&local->dynamic_ps_enable_work);
1519
68542962
JO		 1520 /* Disable ARP filtering */
1521 if (sdata->vif.bss_conf.arp_filter_enabled) {
1522 sdata->vif.bss_conf.arp_filter_enabled = false;
1523 changed |= BSS_CHANGED_ARP_FILTER;
1524 }
1525
3abead59
JB		 1526 sdata->vif.bss_conf.qos = false;
1527 changed |= BSS_CHANGED_QOS;
1528
0aaffa9b
JB		 1529 /* The BSSID (not really interesting) and HT changed */
1530 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1531 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1532
3abead59
JB		 1533 /* disassociated - set to defaults now */
1534 ieee80211_set_wmm_default(sdata, false);
1535
b9dcf712
JB		 1536 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1537 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1538 del_timer_sync(&sdata->u.mgd.timer);
1539 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1540
1541 sdata->u.mgd.timers_running = 0;
028e8da0
JB		 1542
1543 ifmgd->flags = 0;
1544 ieee80211_vif_release_channel(sdata);
aa458d17 1545}
f0706e82 1546
3cf335d5
KV		 1547void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1548 struct ieee80211_hdr *hdr)
1549{
1550 /*
1551 * We can postpone the mgd.timer whenever receiving unicast frames
1552 * from AP because we know that the connection is working both ways
1553 * at that time. But multicast frames (and hence also beacons) must
1554 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1555 * data idle periods for sending the periodic probe request to the
1556 * AP we're connected to.
3cf335d5 1557 */
b291ba11
JB		 1558 if (is_multicast_ether_addr(hdr->addr1))
1559 return;
1560
be099e82 1561 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1562}
f0706e82 1563
4e5ff376
FF		 1564static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1565{
1566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1567 struct ieee80211_local *local = sdata->local;
4e5ff376 1568
133d40f9 1569 mutex_lock(&local->mtx);
4e5ff376 1570 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1571 IEEE80211_STA_CONNECTION_POLL))) {
1572 mutex_unlock(&local->mtx);
1573 return;
1574 }
4e5ff376 1575
925e64c3 1576 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1577
1578 mutex_lock(&local->iflist_mtx);
1579 ieee80211_recalc_ps(local, -1);
1580 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1581
1582 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1583 goto out;
4e5ff376
FF		 1584
1585 /*
1586 * We've received a probe response, but are not sure whether
1587 * we have or will be receiving any beacons or data, so let's
1588 * schedule the timers again, just in case.
1589 */
1590 ieee80211_sta_reset_beacon_monitor(sdata);
1591
1592 mod_timer(&ifmgd->conn_mon_timer,
1593 round_jiffies_up(jiffies +
1594 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1595out:
133d40f9 1596 mutex_unlock(&local->mtx);
4e5ff376
FF		 1597}
1598
1599void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1600 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1601{
75706d0e 1602 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1603 return;
1604
04ac3c0e
FF		 1605 if (ack)
1606 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1607
1608 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1609 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1610 if (ack)
1611 sdata->u.mgd.probe_send_count = 0;
1612 else
1613 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1614 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1615 }
1616}
1617
a43abf29
ML		 1618static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1619{
1620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1621 const u8 *ssid;
f01a067d 1622 u8 *dst = ifmgd->associated->bssid;
180205bd 1623 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1624
1625 /*
1626 * Try sending broadcast probe requests for the last three
1627 * probe requests after the first ones failed since some
1628 * buggy APs only support broadcast probe requests.
1629 */
1630 if (ifmgd->probe_send_count >= unicast_limit)
1631 dst = NULL;
a43abf29 1632
4e5ff376
FF		 1633 /*
1634 * When the hardware reports an accurate Tx ACK status, it's
1635 * better to send a nullfunc frame instead of a probe request,
1636 * as it will kick us off the AP quickly if we aren't associated
1637 * anymore. The timeout will be reset if the frame is ACKed by
1638 * the AP.
1639 */
992e68bf
SD		 1640 ifmgd->probe_send_count++;
1641
04ac3c0e
FF		 1642 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1643 ifmgd->nullfunc_failed = false;
4e5ff376 1644 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1645 } else {
88c868c4
SG		 1646 int ssid_len;
1647
4e5ff376 1648 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1649 if (WARN_ON_ONCE(ssid == NULL))
1650 ssid_len = 0;
1651 else
1652 ssid_len = ssid[1];
1653
1654 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
fe94fe05 1655 0, (u32) -1, true, false,
55de908a 1656 ifmgd->associated->channel, false);
4e5ff376 1657 }
a43abf29 1658
180205bd 1659 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1660 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1661 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1662 drv_flush(sdata->local, false);
a43abf29
ML		 1663}
1664
b291ba11
JB		 1665static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1666 bool beacon)
04de8381 1667{
04de8381 1668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1669 bool already = false;
34bfc411 1670
9607e6b6 1671 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1672 return;
1673
77fdaa12
JB		 1674 mutex_lock(&ifmgd->mtx);
1675
1676 if (!ifmgd->associated)
1677 goto out;
1678
133d40f9
SG		 1679 mutex_lock(&sdata->local->mtx);
1680
1681 if (sdata->local->tmp_channel || sdata->local->scanning) {
1682 mutex_unlock(&sdata->local->mtx);
1683 goto out;
1684 }
1685
e87cc472 1686 if (beacon)
bdcbd8e0
JB		 1687 mlme_dbg_ratelimited(sdata,
1688 "detected beacon loss from AP - sending probe request\n");
1689
6efb71b0
HS		 1690 ieee80211_cqm_rssi_notify(&sdata->vif,
1691 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1692
b291ba11
JB		 1693 /*
1694 * The driver/our work has already reported this event or the
1695 * connection monitoring has kicked in and we have already sent
1696 * a probe request. Or maybe the AP died and the driver keeps
1697 * reporting until we disassociate...
1698 *
1699 * In either case we have to ignore the current call to this
1700 * function (except for setting the correct probe reason bit)
1701 * because otherwise we would reset the timer every time and
1702 * never check whether we received a probe response!
1703 */
1704 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1705 IEEE80211_STA_CONNECTION_POLL))
1706 already = true;
1707
1708 if (beacon)
1709 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1710 else
1711 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1712
133d40f9
SG		 1713 mutex_unlock(&sdata->local->mtx);
1714
b291ba11
JB		 1715 if (already)
1716 goto out;
1717
4e751843
JB		 1718 mutex_lock(&sdata->local->iflist_mtx);
1719 ieee80211_recalc_ps(sdata->local, -1);
1720 mutex_unlock(&sdata->local->iflist_mtx);
1721
a43abf29
ML		 1722 ifmgd->probe_send_count = 0;
1723 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1724 out:
1725 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1726}
1727
a619a4c0
JO		 1728struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1729 struct ieee80211_vif *vif)
1730{
1731 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1733 struct cfg80211_bss *cbss;
a619a4c0
JO		 1734 struct sk_buff *skb;
1735 const u8 *ssid;
88c868c4 1736 int ssid_len;
a619a4c0
JO		 1737
1738 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1739 return NULL;
1740
1741 ASSERT_MGD_MTX(ifmgd);
1742
d9b3b28b
EP		 1743 if (ifmgd->associated)
1744 cbss = ifmgd->associated;
1745 else if (ifmgd->auth_data)
1746 cbss = ifmgd->auth_data->bss;
1747 else if (ifmgd->assoc_data)
1748 cbss = ifmgd->assoc_data->bss;
1749 else
a619a4c0
JO		 1750 return NULL;
1751
d9b3b28b 1752 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1753 if (WARN_ON_ONCE(ssid == NULL))
1754 ssid_len = 0;
1755 else
1756 ssid_len = ssid[1];
1757
d9b3b28b 1758 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1759 (u32) -1, cbss->channel,
6b77863b 1760 ssid + 2, ssid_len,
85a237fe 1761 NULL, 0, true);
a619a4c0
JO		 1762
1763 return skb;
1764}
1765EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1766
882a7c69
JB		 1767static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1768 bool transmit_frame)
1e4dcd01
JO		 1769{
1770 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1771 struct ieee80211_local *local = sdata->local;
6ae16775 1772 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1773
1774 mutex_lock(&ifmgd->mtx);
1775 if (!ifmgd->associated) {
1776 mutex_unlock(&ifmgd->mtx);
1777 return;
1778 }
1779
37ad3888
JB		 1780 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1781 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
882a7c69
JB		 1782 transmit_frame, frame_buf);
1783 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1784 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1785
1e4dcd01
JO		 1786 /*
1787 * must be outside lock due to cfg80211,
1788 * but that's not a problem.
1789 */
6ae16775 1790 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 1791
1792 mutex_lock(&local->mtx);
1793 ieee80211_recalc_idle(local);
1794 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1795}
1796
cc74c0c7 1797static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1798{
1799 struct ieee80211_sub_if_data *sdata =
1800 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1801 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1802 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1803 struct sta_info *sta;
1804
1805 if (ifmgd->associated) {
30fa9047 1806 rcu_read_lock();
a85e1d55
PS		 1807 sta = sta_info_get(sdata, ifmgd->bssid);
1808 if (sta)
1809 sta->beacon_loss_count++;
30fa9047 1810 rcu_read_unlock();
a85e1d55 1811 }
b291ba11 1812
882a7c69
JB		 1813 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1814 sdata_info(sdata, "Connection to AP %pM lost\n",
1815 ifmgd->bssid);
1816 __ieee80211_disconnect(sdata, false);
1817 } else {
1e4dcd01 1818 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1819 }
1820}
1821
1822static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1823{
1824 struct ieee80211_sub_if_data *sdata =
1825 container_of(work, struct ieee80211_sub_if_data,
1826 u.mgd.csa_connection_drop_work);
1827
1828 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1829 IEEE80211_QUEUE_STOP_REASON_CSA);
1830 __ieee80211_disconnect(sdata, true);
b291ba11
JB		 1831}
1832
04de8381
KV		 1833void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1834{
1835 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1836 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1837
b5878a2d
JB		 1838 trace_api_beacon_loss(sdata);
1839
1e4dcd01
JO		 1840 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1841 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1842}
1843EXPORT_SYMBOL(ieee80211_beacon_loss);
1844
1e4dcd01
JO		 1845void ieee80211_connection_loss(struct ieee80211_vif *vif)
1846{
1847 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1848 struct ieee80211_hw *hw = &sdata->local->hw;
1849
b5878a2d
JB		 1850 trace_api_connection_loss(sdata);
1851
1e4dcd01
JO		 1852 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1853 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1854}
1855EXPORT_SYMBOL(ieee80211_connection_loss);
1856
1857
66e67e41
JB		 1858static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1859 bool assoc)
1860{
1861 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1862
1863 lockdep_assert_held(&sdata->u.mgd.mtx);
1864
66e67e41
JB		 1865 if (!assoc) {
1866 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1867
1868 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1869 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 1870 sdata->u.mgd.flags = 0;
55de908a 1871 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1872 }
1873
1874 cfg80211_put_bss(auth_data->bss);
1875 kfree(auth_data);
1876 sdata->u.mgd.auth_data = NULL;
1877}
1878
1879static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1880 struct ieee80211_mgmt *mgmt, size_t len)
1881{
1882 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1883 u8 *pos;
1884 struct ieee802_11_elems elems;
1885
1886 pos = mgmt->u.auth.variable;
1887 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1888 if (!elems.challenge)
1889 return;
1890 auth_data->expected_transaction = 4;
a1845fc7 1891 drv_mgd_prepare_tx(sdata->local, sdata);
700e8ea6 1892 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 1893 elems.challenge - 2, elems.challenge_len + 2,
1894 auth_data->bss->bssid, auth_data->bss->bssid,
1895 auth_data->key, auth_data->key_len,
1896 auth_data->key_idx);
1897}
1898
1899static enum rx_mgmt_action __must_check
1900ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1901 struct ieee80211_mgmt *mgmt, size_t len)
1902{
1903 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1904 u8 bssid[ETH_ALEN];
1905 u16 auth_alg, auth_transaction, status_code;
1906 struct sta_info *sta;
1907
1908 lockdep_assert_held(&ifmgd->mtx);
1909
1910 if (len < 24 + 6)
1911 return RX_MGMT_NONE;
1912
1913 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1914 return RX_MGMT_NONE;
1915
1916 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1917
b203ca39 1918 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1919 return RX_MGMT_NONE;
1920
1921 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1922 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1923 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1924
1925 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 1926 auth_transaction != ifmgd->auth_data->expected_transaction) {
1927 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1928 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1929 auth_transaction,
1930 ifmgd->auth_data->expected_transaction);
66e67e41 1931 return RX_MGMT_NONE;
0f4126e8 1932 }
66e67e41
JB		 1933
1934 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1935 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1936 mgmt->sa, status_code);
dac211ec
EP		 1937 ieee80211_destroy_auth_data(sdata, false);
1938 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1939 }
1940
1941 switch (ifmgd->auth_data->algorithm) {
1942 case WLAN_AUTH_OPEN:
1943 case WLAN_AUTH_LEAP:
1944 case WLAN_AUTH_FT:
6b8ece3a 1945 case WLAN_AUTH_SAE:
66e67e41
JB		 1946 break;
1947 case WLAN_AUTH_SHARED_KEY:
1948 if (ifmgd->auth_data->expected_transaction != 4) {
1949 ieee80211_auth_challenge(sdata, mgmt, len);
1950 /* need another frame */
1951 return RX_MGMT_NONE;
1952 }
1953 break;
1954 default:
1955 WARN_ONCE(1, "invalid auth alg %d",
1956 ifmgd->auth_data->algorithm);
1957 return RX_MGMT_NONE;
1958 }
1959
bdcbd8e0 1960 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1961 ifmgd->auth_data->done = true;
1962 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1963 run_again(ifmgd, ifmgd->auth_data->timeout);
1964
6b8ece3a
JM		 1965 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
1966 ifmgd->auth_data->expected_transaction != 2) {
1967 /*
1968 * Report auth frame to user space for processing since another
1969 * round of Authentication frames is still needed.
1970 */
1971 return RX_MGMT_CFG80211_RX_AUTH;
1972 }
1973
66e67e41
JB		 1974 /* move station state to auth */
1975 mutex_lock(&sdata->local->sta_mtx);
1976 sta = sta_info_get(sdata, bssid);
1977 if (!sta) {
1978 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1979 goto out_err;
1980 }
1981 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1982 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1983 goto out_err;
1984 }
1985 mutex_unlock(&sdata->local->sta_mtx);
1986
1987 return RX_MGMT_CFG80211_RX_AUTH;
1988 out_err:
1989 mutex_unlock(&sdata->local->sta_mtx);
1990 /* ignore frame -- wait for timeout */
1991 return RX_MGMT_NONE;
1992}
1993
1994
77fdaa12
JB		 1995static enum rx_mgmt_action __must_check
1996ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1997 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1998{
46900298 1999 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2000 const u8 *bssid = NULL;
f0706e82
JB		 2001 u16 reason_code;
2002
66e67e41
JB		 2003 lockdep_assert_held(&ifmgd->mtx);
2004
f4ea83dd 2005 if (len < 24 + 2)
77fdaa12 2006 return RX_MGMT_NONE;
f0706e82 2007
66e67e41 2008 if (!ifmgd->associated ||
b203ca39 2009 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2010 return RX_MGMT_NONE;
77fdaa12 2011
0c1ad2ca 2012 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2013
2014 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2015
bdcbd8e0
JB		 2016 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2017 bssid, reason_code);
77fdaa12 2018
37ad3888
JB		 2019 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2020
7da7cc1d 2021 mutex_lock(&sdata->local->mtx);
63f170e0 2022 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2023 mutex_unlock(&sdata->local->mtx);
f0706e82 2024
77fdaa12 2025 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2026}
2027
2028
77fdaa12
JB		 2029static enum rx_mgmt_action __must_check
2030ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2031 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2032{
46900298 2033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2034 u16 reason_code;
2035
66e67e41 2036 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2037
66e67e41 2038 if (len < 24 + 2)
77fdaa12
JB		 2039 return RX_MGMT_NONE;
2040
66e67e41 2041 if (!ifmgd->associated ||
b203ca39 2042 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2043 return RX_MGMT_NONE;
f0706e82
JB		 2044
2045 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2046
bdcbd8e0
JB		 2047 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2048 mgmt->sa, reason_code);
f0706e82 2049
37ad3888
JB		 2050 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2051
7da7cc1d 2052 mutex_lock(&sdata->local->mtx);
bc83b681 2053 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2054 mutex_unlock(&sdata->local->mtx);
37ad3888 2055
77fdaa12 2056 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2057}
2058
c74d084f
CL		 2059static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2060 u8 *supp_rates, unsigned int supp_rates_len,
2061 u32 *rates, u32 *basic_rates,
2062 bool *have_higher_than_11mbit,
2063 int *min_rate, int *min_rate_index)
2064{
2065 int i, j;
2066
2067 for (i = 0; i < supp_rates_len; i++) {
2068 int rate = (supp_rates[i] & 0x7f) * 5;
2069 bool is_basic = !!(supp_rates[i] & 0x80);
2070
2071 if (rate > 110)
2072 *have_higher_than_11mbit = true;
2073
2074 /*
2075 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2076 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2077 *
2078 * Note: Even through the membership selector and the basic
2079 * rate flag share the same bit, they are not exactly
2080 * the same.
2081 */
2082 if (!!(supp_rates[i] & 0x80) &&
2083 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2084 continue;
2085
2086 for (j = 0; j < sband->n_bitrates; j++) {
2087 if (sband->bitrates[j].bitrate == rate) {
2088 *rates |= BIT(j);
2089 if (is_basic)
2090 *basic_rates |= BIT(j);
2091 if (rate < *min_rate) {
2092 *min_rate = rate;
2093 *min_rate_index = j;
2094 }
2095 break;
2096 }
2097 }
2098 }
2099}
f0706e82 2100
66e67e41
JB		 2101static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2102 bool assoc)
2103{
2104 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2105
2106 lockdep_assert_held(&sdata->u.mgd.mtx);
2107
66e67e41
JB		 2108 if (!assoc) {
2109 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2110
2111 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2112 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2113 sdata->u.mgd.flags = 0;
55de908a 2114 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2115 }
2116
2117 kfree(assoc_data);
2118 sdata->u.mgd.assoc_data = NULL;
2119}
2120
2121static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2122 struct cfg80211_bss *cbss,
af6b6374 2123 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2124{
46900298 2125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2126 struct ieee80211_local *local = sdata->local;
8318d78a 2127 struct ieee80211_supported_band *sband;
f0706e82 2128 struct sta_info *sta;
af6b6374 2129 u8 *pos;
af6b6374 2130 u16 capab_info, aid;
f0706e82 2131 struct ieee802_11_elems elems;
bda3933a 2132 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2133 u32 changed = 0;
c74d084f 2134 int err;
f0706e82 2135
af6b6374 2136 /* AssocResp and ReassocResp have identical structure */
f0706e82 2137
f0706e82 2138 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2139 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2140
1dd84aa2 2141 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2142 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2143 aid);
1dd84aa2
JB		 2144 aid &= ~(BIT(15) | BIT(14));
2145
05cb9108
JB		 2146 ifmgd->broken_ap = false;
2147
2148 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2149 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2150 aid);
05cb9108
JB		 2151 aid = 0;
2152 ifmgd->broken_ap = true;
2153 }
2154
af6b6374
JB		 2155 pos = mgmt->u.assoc_resp.variable;
2156 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2157
f0706e82 2158 if (!elems.supp_rates) {
bdcbd8e0 2159 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2160 return false;
f0706e82
JB		 2161 }
2162
46900298 2163 ifmgd->aid = aid;
f0706e82 2164
2a33bee2
GE		 2165 mutex_lock(&sdata->local->sta_mtx);
2166 /*
2167 * station info was already allocated and inserted before
2168 * the association and should be available to us
2169 */
7852e361 2170 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2171 if (WARN_ON(!sta)) {
2172 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2173 return false;
77fdaa12 2174 }
05e5e883 2175
55de908a 2176 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2177
a8243b72 2178 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2179 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2180 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2181
64f68e5d
JB		 2182 sta->supports_40mhz =
2183 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2184
818255ea
MP		 2185 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2186 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2187 elems.vht_cap_elem,
2188 &sta->sta.vht_cap);
2189
4b7679a5 2190 rate_control_rate_init(sta);
f0706e82 2191
46900298 2192 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2193 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2194
ddf4ac53 2195 if (elems.wmm_param)
c2c98fde 2196 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2197
c8987876
JB		 2198 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2199 if (!err)
2200 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2201 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2202 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2203 if (err) {
bdcbd8e0
JB		 2204 sdata_info(sdata,
2205 "failed to move station %pM to desired state\n",
2206 sta->sta.addr);
c8987876
JB		 2207 WARN_ON(__sta_info_destroy(sta));
2208 mutex_unlock(&sdata->local->sta_mtx);
2209 return false;
2210 }
2211
7852e361 2212 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2213
f2176d72
JO		 2214 /*
2215 * Always handle WMM once after association regardless
2216 * of the first value the AP uses. Setting -1 here has
2217 * that effect because the AP values is an unsigned
2218 * 4-bit value.
2219 */
2220 ifmgd->wmm_last_param_set = -1;
2221
ddf4ac53 2222 if (elems.wmm_param)
4ced3f74 2223 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2224 elems.wmm_param_len);
aa837e1d 2225 else
3abead59
JB		 2226 ieee80211_set_wmm_default(sdata, false);
2227 changed |= BSS_CHANGED_QOS;
f0706e82 2228
074d46d1 2229 if (elems.ht_operation && elems.wmm_param &&
a8243b72 2230 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2231 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2232 cbss->bssid, false);
ae5eb026 2233
60f8b39c
JB		 2234 /* set AID and assoc capability,
2235 * ieee80211_set_associated() will tell the driver */
2236 bss_conf->aid = aid;
2237 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2238 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2239
d524215f
FF		 2240 /*
2241 * If we're using 4-addr mode, let the AP know that we're
2242 * doing so, so that it can create the STA VLAN on its side
2243 */
2244 if (ifmgd->use_4addr)
2245 ieee80211_send_4addr_nullfunc(local, sdata);
2246
15b7b062 2247 /*
b291ba11
JB		 2248 * Start timer to probe the connection to the AP now.
2249 * Also start the timer that will detect beacon loss.
15b7b062 2250 */
b291ba11 2251 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2252 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2253
af6b6374 2254 return true;
f0706e82
JB		 2255}
2256
66e67e41
JB		 2257static enum rx_mgmt_action __must_check
2258ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2259 struct ieee80211_mgmt *mgmt, size_t len,
2260 struct cfg80211_bss **bss)
2261{
2262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2263 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2264 u16 capab_info, status_code, aid;
2265 struct ieee802_11_elems elems;
2266 u8 *pos;
2267 bool reassoc;
2268
2269 lockdep_assert_held(&ifmgd->mtx);
2270
2271 if (!assoc_data)
2272 return RX_MGMT_NONE;
b203ca39 2273 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2274 return RX_MGMT_NONE;
2275
2276 /*
2277 * AssocResp and ReassocResp have identical structure, so process both
2278 * of them in this function.
2279 */
2280
2281 if (len < 24 + 6)
2282 return RX_MGMT_NONE;
2283
2284 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2285 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2286 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2287 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2288
bdcbd8e0
JB		 2289 sdata_info(sdata,
2290 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2291 reassoc ? "Rea" : "A", mgmt->sa,
2292 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2293
2294 pos = mgmt->u.assoc_resp.variable;
2295 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2296
2297 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2298 elems.timeout_int && elems.timeout_int_len == 5 &&
2299 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2300 u32 tu, ms;
2301 tu = get_unaligned_le32(elems.timeout_int + 1);
2302 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2303 sdata_info(sdata,
2304 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2305 mgmt->sa, tu, ms);
66e67e41
JB		 2306 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2307 if (ms > IEEE80211_ASSOC_TIMEOUT)
2308 run_again(ifmgd, assoc_data->timeout);
2309 return RX_MGMT_NONE;
2310 }
2311
2312 *bss = assoc_data->bss;
2313
2314 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2315 sdata_info(sdata, "%pM denied association (code=%d)\n",
2316 mgmt->sa, status_code);
66e67e41
JB		 2317 ieee80211_destroy_assoc_data(sdata, false);
2318 } else {
66e67e41
JB		 2319 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2320 /* oops -- internal error -- send timeout for now */
10a9109f 2321 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2322 cfg80211_put_bss(*bss);
2323 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2324 }
635d999f 2325 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2326
2327 /*
2328 * destroy assoc_data afterwards, as otherwise an idle
2329 * recalc after assoc_data is NULL but before associated
2330 * is set can cause the interface to go idle
2331 */
2332 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2333 }
2334
2335 return RX_MGMT_CFG80211_RX_ASSOC;
2336}
98c8fccf
JB		 2337static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2338 struct ieee80211_mgmt *mgmt,
2339 size_t len,
2340 struct ieee80211_rx_status *rx_status,
2341 struct ieee802_11_elems *elems,
2342 bool beacon)
2343{
2344 struct ieee80211_local *local = sdata->local;
2345 int freq;
c2b13452 2346 struct ieee80211_bss *bss;
98c8fccf 2347 struct ieee80211_channel *channel;
56007a02
JB		 2348 bool need_ps = false;
2349
66e67e41 2350 if (sdata->u.mgd.associated &&
b203ca39 2351 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2352 bss = (void *)sdata->u.mgd.associated->priv;
2353 /* not previously set so we may need to recalc */
2354 need_ps = !bss->dtim_period;
2355 }
98c8fccf
JB		 2356
2357 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2358 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2359 rx_status->band);
98c8fccf
JB		 2360 else
2361 freq = rx_status->freq;
2362
2363 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2364
2365 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2366 return;
2367
98c8fccf 2368 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2369 channel, beacon);
77fdaa12
JB		 2370 if (bss)
2371 ieee80211_rx_bss_put(local, bss);
2372
2373 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2374 return;
2375
56007a02
JB		 2376 if (need_ps) {
2377 mutex_lock(&local->iflist_mtx);
2378 ieee80211_recalc_ps(local, -1);
2379 mutex_unlock(&local->iflist_mtx);
2380 }
2381
5bc1420b
JB		 2382 if (elems->ch_switch_ie &&
2383 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2384 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2385 bss, rx_status->mactime);
f0706e82
JB		 2386}
2387
2388
f698d856 2389static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2390 struct sk_buff *skb)
f0706e82 2391{
af6b6374 2392 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2393 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2394 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2395 size_t baselen, len = skb->len;
ae6a44e3
EK		 2396 struct ieee802_11_elems elems;
2397
15b7b062
KV		 2398 ifmgd = &sdata->u.mgd;
2399
77fdaa12
JB		 2400 ASSERT_MGD_MTX(ifmgd);
2401
b203ca39 2402 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2403 return; /* ignore ProbeResp to foreign address */
2404
ae6a44e3
EK		 2405 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2406 if (baselen > len)
2407 return;
2408
2409 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2410 &elems);
2411
98c8fccf 2412 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2413
77fdaa12 2414 if (ifmgd->associated &&
b203ca39 2415 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2416 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2417
2418 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2419 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2420 /* got probe response, continue with auth */
bdcbd8e0 2421 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2422 ifmgd->auth_data->tries = 0;
2423 ifmgd->auth_data->timeout = jiffies;
2424 run_again(ifmgd, ifmgd->auth_data->timeout);
2425 }
f0706e82
JB		 2426}
2427
d91f36db
JB		 2428/*
2429 * This is the canonical list of information elements we care about,
2430 * the filter code also gives us all changes to the Microsoft OUI
2431 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2432 *
2433 * We implement beacon filtering in software since that means we can
2434 * avoid processing the frame here and in cfg80211, and userspace
2435 * will not be able to tell whether the hardware supports it or not.
2436 *
2437 * XXX: This list needs to be dynamic -- userspace needs to be able to
2438 * add items it requires. It also needs to be able to tell us to
2439 * look out for other vendor IEs.
2440 */
2441static const u64 care_about_ies =
1d4df3a5
JB		 2442 (1ULL << WLAN_EID_COUNTRY) |
2443 (1ULL << WLAN_EID_ERP_INFO) |
2444 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2445 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2446 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2447 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2448
f698d856 2449static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2450 struct ieee80211_mgmt *mgmt,
2451 size_t len,
2452 struct ieee80211_rx_status *rx_status)
2453{
d91f36db 2454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2455 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2456 size_t baselen;
2457 struct ieee802_11_elems elems;
f698d856 2458 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2459 struct ieee80211_chanctx_conf *chanctx_conf;
2460 struct ieee80211_channel *chan;
471b3efd 2461 u32 changed = 0;
f87ad637 2462 bool erp_valid;
7a5158ef 2463 u8 erp_value = 0;
d91f36db 2464 u32 ncrc;
77fdaa12
JB		 2465 u8 *bssid;
2466
66e67e41 2467 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2468
ae6a44e3
EK		 2469 /* Process beacon from the current BSS */
2470 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2471 if (baselen > len)
2472 return;
2473
55de908a
JB		 2474 rcu_read_lock();
2475 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2476 if (!chanctx_conf) {
2477 rcu_read_unlock();
f0706e82 2478 return;
55de908a
JB		 2479 }
2480
4bf88530 2481 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a
JB		 2482 rcu_read_unlock();
2483 return;
2484 }
4bf88530 2485 chan = chanctx_conf->def.chan;
55de908a 2486 rcu_read_unlock();
f0706e82 2487
66e67e41 2488 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2489 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2490 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2491 len - baselen, &elems);
77fdaa12 2492
66e67e41
JB		 2493 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2494 false);
2495 ifmgd->assoc_data->have_beacon = true;
2496 ifmgd->assoc_data->sent_assoc = false;
2497 /* continue assoc process */
2498 ifmgd->assoc_data->timeout = jiffies;
2499 run_again(ifmgd, ifmgd->assoc_data->timeout);
2500 return;
2501 }
77fdaa12 2502
66e67e41 2503 if (!ifmgd->associated ||
b203ca39 2504 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2505 return;
66e67e41 2506 bssid = ifmgd->associated->bssid;
f0706e82 2507
17e4ec14
JM		 2508 /* Track average RSSI from the Beacon frames of the current AP */
2509 ifmgd->last_beacon_signal = rx_status->signal;
2510 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2511 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2512 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2513 ifmgd->last_cqm_event_signal = 0;
391a200a 2514 ifmgd->count_beacon_signal = 1;
615f7b9b 2515 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2516 } else {
2517 ifmgd->ave_beacon_signal =
2518 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2519 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2520 ifmgd->ave_beacon_signal) / 16;
391a200a 2521 ifmgd->count_beacon_signal++;
17e4ec14 2522 }
615f7b9b
MV		 2523
2524 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2525 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2526 int sig = ifmgd->ave_beacon_signal;
2527 int last_sig = ifmgd->last_ave_beacon_signal;
2528
2529 /*
2530 * if signal crosses either of the boundaries, invoke callback
2531 * with appropriate parameters
2532 */
2533 if (sig > ifmgd->rssi_max_thold &&
2534 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2535 ifmgd->last_ave_beacon_signal = sig;
2536 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2537 } else if (sig < ifmgd->rssi_min_thold &&
2538 (last_sig >= ifmgd->rssi_max_thold ||
2539 last_sig == 0)) {
2540 ifmgd->last_ave_beacon_signal = sig;
2541 drv_rssi_callback(local, RSSI_EVENT_LOW);
2542 }
2543 }
2544
17e4ec14 2545 if (bss_conf->cqm_rssi_thold &&
391a200a 2546 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2547 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2548 int sig = ifmgd->ave_beacon_signal / 16;
2549 int last_event = ifmgd->last_cqm_event_signal;
2550 int thold = bss_conf->cqm_rssi_thold;
2551 int hyst = bss_conf->cqm_rssi_hyst;
2552 if (sig < thold &&
2553 (last_event == 0 || sig < last_event - hyst)) {
2554 ifmgd->last_cqm_event_signal = sig;
2555 ieee80211_cqm_rssi_notify(
2556 &sdata->vif,
2557 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2558 GFP_KERNEL);
2559 } else if (sig > thold &&
2560 (last_event == 0 || sig > last_event + hyst)) {
2561 ifmgd->last_cqm_event_signal = sig;
2562 ieee80211_cqm_rssi_notify(
2563 &sdata->vif,
2564 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2565 GFP_KERNEL);
2566 }
2567 }
2568
b291ba11 2569 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2570 mlme_dbg_ratelimited(sdata,
2571 "cancelling probereq poll due to a received beacon\n");
925e64c3 2572 mutex_lock(&local->mtx);
b291ba11 2573 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2574 ieee80211_run_deferred_scan(local);
2575 mutex_unlock(&local->mtx);
2576
4e751843
JB		 2577 mutex_lock(&local->iflist_mtx);
2578 ieee80211_recalc_ps(local, -1);
2579 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2580 }
2581
b291ba11
JB		 2582 /*
2583 * Push the beacon loss detection into the future since
2584 * we are processing a beacon from the AP just now.
2585 */
d3a910a8 2586 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2587
d91f36db
JB		 2588 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2589 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2590 len - baselen, &elems,
2591 care_about_ies, ncrc);
2592
25c9c875 2593 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2594 bool directed_tim = ieee80211_check_tim(elems.tim,
2595 elems.tim_len,
2596 ifmgd->aid);
1fb3606b 2597 if (directed_tim) {
572e0012 2598 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2599 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2600 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2601 ieee80211_hw_config(local,
2602 IEEE80211_CONF_CHANGE_PS);
2603 }
572e0012 2604 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2605 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2606 local->pspolling = true;
2607
2608 /*
2609 * Here is assumed that the driver will be
2610 * able to send ps-poll frame and receive a
2611 * response even though power save mode is
2612 * enabled, but some drivers might require
2613 * to disable power save here. This needs
2614 * to be investigated.
2615 */
2616 ieee80211_send_pspoll(local, sdata);
2617 }
a97b77b9
VN		 2618 }
2619 }
7a5158ef 2620
488dd7b5
JB		 2621 if (sdata->vif.p2p) {
2622 u8 noa[2];
2623 int ret;
2624
2625 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2626 len - baselen,
2627 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2628 noa, sizeof(noa));
2629 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2630 bss_conf->p2p_oppps = noa[1] & 0x80;
2631 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2632 changed |= BSS_CHANGED_P2P_PS;
2633 sdata->u.mgd.p2p_noa_index = noa[0];
2634 /*
2635 * make sure we update all information, the CRC
2636 * mechanism doesn't look at P2P attributes.
2637 */
2638 ifmgd->beacon_crc_valid = false;
2639 }
2640 }
2641
d8ec4433 2642 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2643 return;
2644 ifmgd->beacon_crc = ncrc;
d8ec4433 2645 ifmgd->beacon_crc_valid = true;
30196673 2646
7d25745d
JB		 2647 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2648 true);
2649
2650 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2651 elems.wmm_param_len))
2652 changed |= BSS_CHANGED_QOS;
2653
7a5158ef
JB		 2654 if (elems.erp_info && elems.erp_info_len >= 1) {
2655 erp_valid = true;
2656 erp_value = elems.erp_info[0];
2657 } else {
2658 erp_valid = false;
50c4afb9 2659 }
7a5158ef
JB		 2660 changed |= ieee80211_handle_bss_capability(sdata,
2661 le16_to_cpu(mgmt->u.beacon.capab_info),
2662 erp_valid, erp_value);
f0706e82 2663
d3c990fb 2664
074d46d1 2665 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
a8243b72 2666 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2667 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2668 bssid, true);
d3c990fb 2669
04b7b2ff
JB		 2670 if (elems.country_elem && elems.pwr_constr_elem &&
2671 mgmt->u.probe_resp.capab_info &
2672 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2673 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2674 elems.country_elem,
2675 elems.country_elem_len,
2676 elems.pwr_constr_elem);
3f2355cb 2677
471b3efd 2678 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2679}
2680
1fa57d01
JB		 2681void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2682 struct sk_buff *skb)
f0706e82 2683{
77fdaa12 2684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2685 struct ieee80211_rx_status *rx_status;
f0706e82 2686 struct ieee80211_mgmt *mgmt;
66e67e41 2687 struct cfg80211_bss *bss = NULL;
77fdaa12 2688 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2689 u16 fc;
2690
f0706e82
JB		 2691 rx_status = (struct ieee80211_rx_status *) skb->cb;
2692 mgmt = (struct ieee80211_mgmt *) skb->data;
2693 fc = le16_to_cpu(mgmt->frame_control);
2694
77fdaa12
JB		 2695 mutex_lock(&ifmgd->mtx);
2696
66e67e41
JB		 2697 switch (fc & IEEE80211_FCTL_STYPE) {
2698 case IEEE80211_STYPE_BEACON:
2699 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2700 break;
2701 case IEEE80211_STYPE_PROBE_RESP:
2702 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2703 break;
2704 case IEEE80211_STYPE_AUTH:
2705 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2706 break;
2707 case IEEE80211_STYPE_DEAUTH:
2708 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2709 break;
2710 case IEEE80211_STYPE_DISASSOC:
2711 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2712 break;
2713 case IEEE80211_STYPE_ASSOC_RESP:
2714 case IEEE80211_STYPE_REASSOC_RESP:
2715 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2716 break;
2717 case IEEE80211_STYPE_ACTION:
2718 switch (mgmt->u.action.category) {
2719 case WLAN_CATEGORY_SPECTRUM_MGMT:
2720 ieee80211_sta_process_chanswitch(sdata,
2721 &mgmt->u.action.u.chan_switch.sw_elem,
2722 (void *)ifmgd->associated->priv,
2723 rx_status->mactime);
77fdaa12 2724 break;
77fdaa12 2725 }
77fdaa12 2726 }
77fdaa12
JB		 2727 mutex_unlock(&ifmgd->mtx);
2728
66e67e41
JB		 2729 switch (rma) {
2730 case RX_MGMT_NONE:
2731 /* no action */
2732 break;
2733 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2734 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2735 break;
2736 case RX_MGMT_CFG80211_DISASSOC:
2737 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2738 break;
2739 case RX_MGMT_CFG80211_RX_AUTH:
2740 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2741 break;
2742 case RX_MGMT_CFG80211_RX_ASSOC:
2743 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2744 break;
2745 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2746 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2747 break;
2748 default:
2749 WARN(1, "unexpected: %d", rma);
b054b747 2750 }
f0706e82
JB		 2751}
2752
9c6bd790 2753static void ieee80211_sta_timer(unsigned long data)
f0706e82 2754{
60f8b39c
JB		 2755 struct ieee80211_sub_if_data *sdata =
2756 (struct ieee80211_sub_if_data *) data;
46900298 2757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2758 struct ieee80211_local *local = sdata->local;
f0706e82 2759
5bb644a0
JB		 2760 if (local->quiescing) {
2761 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2762 return;
2763 }
2764
64592c8f 2765 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2766}
2767
04ac3c0e 2768static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2769 u8 *bssid, u8 reason)
04ac3c0e
FF		 2770{
2771 struct ieee80211_local *local = sdata->local;
2772 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2773 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2774
37ad3888
JB		 2775 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2776 false, frame_buf);
04ac3c0e 2777 mutex_unlock(&ifmgd->mtx);
37ad3888 2778
04ac3c0e
FF		 2779 /*
2780 * must be outside lock due to cfg80211,
2781 * but that's not a problem.
2782 */
6ae16775 2783 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 2784
2785 mutex_lock(&local->mtx);
2786 ieee80211_recalc_idle(local);
2787 mutex_unlock(&local->mtx);
2788
04ac3c0e
FF		 2789 mutex_lock(&ifmgd->mtx);
2790}
2791
66e67e41
JB		 2792static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2793{
2794 struct ieee80211_local *local = sdata->local;
2795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2796 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2797
2798 lockdep_assert_held(&ifmgd->mtx);
2799
2800 if (WARN_ON_ONCE(!auth_data))
2801 return -EINVAL;
2802
66e67e41
JB		 2803 auth_data->tries++;
2804
2805 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2806 sdata_info(sdata, "authentication with %pM timed out\n",
2807 auth_data->bss->bssid);
66e67e41
JB		 2808
2809 /*
2810 * Most likely AP is not in the range so remove the
2811 * bss struct for that AP.
2812 */
2813 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2814
2815 return -ETIMEDOUT;
2816 }
2817
a1845fc7
JB		 2818 drv_mgd_prepare_tx(local, sdata);
2819
66e67e41 2820 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 2821 u16 trans = 1;
2822 u16 status = 0;
2823
bdcbd8e0
JB		 2824 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2825 auth_data->bss->bssid, auth_data->tries,
2826 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2827
2828 auth_data->expected_transaction = 2;
6b8ece3a
JM		 2829
2830 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2831 trans = auth_data->sae_trans;
2832 status = auth_data->sae_status;
2833 auth_data->expected_transaction = trans;
2834 }
2835
2836 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2837 auth_data->data, auth_data->data_len,
66e67e41
JB		 2838 auth_data->bss->bssid,
2839 auth_data->bss->bssid, NULL, 0, 0);
2840 } else {
2841 const u8 *ssidie;
2842
bdcbd8e0
JB		 2843 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2844 auth_data->bss->bssid, auth_data->tries,
2845 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2846
2847 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2848 if (!ssidie)
2849 return -EINVAL;
2850 /*
2851 * Direct probe is sent to broadcast address as some APs
2852 * will not answer to direct packet in unassociated state.
2853 */
2854 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
fe94fe05 2855 NULL, 0, (u32) -1, true, false,
55de908a 2856 auth_data->bss->channel, false);
66e67e41
JB		 2857 }
2858
2859 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2860 run_again(ifmgd, auth_data->timeout);
2861
2862 return 0;
2863}
2864
2865static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2866{
2867 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2868 struct ieee80211_local *local = sdata->local;
2869
2870 lockdep_assert_held(&sdata->u.mgd.mtx);
2871
66e67e41
JB		 2872 assoc_data->tries++;
2873 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2874 sdata_info(sdata, "association with %pM timed out\n",
2875 assoc_data->bss->bssid);
66e67e41
JB		 2876
2877 /*
2878 * Most likely AP is not in the range so remove the
2879 * bss struct for that AP.
2880 */
2881 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2882
2883 return -ETIMEDOUT;
2884 }
2885
bdcbd8e0
JB		 2886 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2887 assoc_data->bss->bssid, assoc_data->tries,
2888 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2889 ieee80211_send_assoc(sdata);
2890
2891 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2892 run_again(&sdata->u.mgd, assoc_data->timeout);
2893
2894 return 0;
2895}
2896
1fa57d01 2897void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2898{
9c6bd790 2899 struct ieee80211_local *local = sdata->local;
1fa57d01 2900 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2901
77fdaa12
JB		 2902 mutex_lock(&ifmgd->mtx);
2903
66e67e41
JB		 2904 if (ifmgd->auth_data &&
2905 time_after(jiffies, ifmgd->auth_data->timeout)) {
2906 if (ifmgd->auth_data->done) {
2907 /*
2908 * ok ... we waited for assoc but userspace didn't,
2909 * so let's just kill the auth data
2910 */
2911 ieee80211_destroy_auth_data(sdata, false);
2912 } else if (ieee80211_probe_auth(sdata)) {
2913 u8 bssid[ETH_ALEN];
2914
2915 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2916
2917 ieee80211_destroy_auth_data(sdata, false);
2918
2919 mutex_unlock(&ifmgd->mtx);
2920 cfg80211_send_auth_timeout(sdata->dev, bssid);
2921 mutex_lock(&ifmgd->mtx);
2922 }
2923 } else if (ifmgd->auth_data)
2924 run_again(ifmgd, ifmgd->auth_data->timeout);
2925
2926 if (ifmgd->assoc_data &&
2927 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2928 if (!ifmgd->assoc_data->have_beacon ||
2929 ieee80211_do_assoc(sdata)) {
2930 u8 bssid[ETH_ALEN];
2931
2932 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2933
2934 ieee80211_destroy_assoc_data(sdata, false);
2935
2936 mutex_unlock(&ifmgd->mtx);
2937 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2938 mutex_lock(&ifmgd->mtx);
2939 }
2940 } else if (ifmgd->assoc_data)
2941 run_again(ifmgd, ifmgd->assoc_data->timeout);
2942
b291ba11
JB		 2943 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2944 IEEE80211_STA_CONNECTION_POLL) &&
2945 ifmgd->associated) {
a43abf29 2946 u8 bssid[ETH_ALEN];
72a8a3ed 2947 int max_tries;
a43abf29 2948
0c1ad2ca 2949 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2950
72a8a3ed 2951 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2952 max_tries = max_nullfunc_tries;
72a8a3ed 2953 else
180205bd 2954 max_tries = max_probe_tries;
72a8a3ed 2955
4e5ff376
FF		 2956 /* ACK received for nullfunc probing frame */
2957 if (!ifmgd->probe_send_count)
2958 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2959 else if (ifmgd->nullfunc_failed) {
2960 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2961 mlme_dbg(sdata,
2962 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2963 bssid, ifmgd->probe_send_count,
2964 max_tries);
04ac3c0e
FF		 2965 ieee80211_mgd_probe_ap_send(sdata);
2966 } else {
bdcbd8e0
JB		 2967 mlme_dbg(sdata,
2968 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2969 bssid);
95acac61
JB		 2970 ieee80211_sta_connection_lost(sdata, bssid,
2971 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2972 }
2973 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2974 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2975 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2976 mlme_dbg(sdata,
2977 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2978 bssid, probe_wait_ms);
95acac61
JB		 2979 ieee80211_sta_connection_lost(sdata, bssid,
2980 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2981 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2982 mlme_dbg(sdata,
2983 "No probe response from AP %pM after %dms, try %d/%i\n",
2984 bssid, probe_wait_ms,
2985 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2986 ieee80211_mgd_probe_ap_send(sdata);
2987 } else {
b291ba11
JB		 2988 /*
2989 * We actually lost the connection ... or did we?
2990 * Let's make sure!
2991 */
b38afa87
BG		 2992 wiphy_debug(local->hw.wiphy,
2993 "%s: No probe response from AP %pM"
2994 " after %dms, disconnecting.\n",
2995 sdata->name,
180205bd 2996 bssid, probe_wait_ms);
04ac3c0e 2997
95acac61
JB		 2998 ieee80211_sta_connection_lost(sdata, bssid,
2999 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 3000 }
3001 }
3002
77fdaa12 3003 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 3004
3005 mutex_lock(&local->mtx);
3006 ieee80211_recalc_idle(local);
3007 mutex_unlock(&local->mtx);
f0706e82
JB		 3008}
3009
b291ba11
JB		 3010static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3011{
3012 struct ieee80211_sub_if_data *sdata =
3013 (struct ieee80211_sub_if_data *) data;
3014 struct ieee80211_local *local = sdata->local;
3015
3016 if (local->quiescing)
3017 return;
3018
1e4dcd01
JO		 3019 ieee80211_queue_work(&sdata->local->hw,
3020 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3021}
3022
3023static void ieee80211_sta_conn_mon_timer(unsigned long data)
3024{
3025 struct ieee80211_sub_if_data *sdata =
3026 (struct ieee80211_sub_if_data *) data;
3027 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3028 struct ieee80211_local *local = sdata->local;
3029
3030 if (local->quiescing)
3031 return;
3032
42935eca 3033 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3034}
3035
3036static void ieee80211_sta_monitor_work(struct work_struct *work)
3037{
3038 struct ieee80211_sub_if_data *sdata =
3039 container_of(work, struct ieee80211_sub_if_data,
3040 u.mgd.monitor_work);
3041
3042 ieee80211_mgd_probe_ap(sdata, false);
3043}
3044
9c6bd790
JB		 3045static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3046{
494f1fe5
EP		 3047 u32 flags;
3048
ad935687 3049 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3050 __ieee80211_stop_poll(sdata);
ad935687 3051
b291ba11 3052 /* let's probe the connection once */
494f1fe5
EP		 3053 flags = sdata->local->hw.flags;
3054 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3055 ieee80211_queue_work(&sdata->local->hw,
3056 &sdata->u.mgd.monitor_work);
b291ba11 3057 /* and do all the other regular work too */
64592c8f 3058 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3059 }
9c6bd790 3060}
f0706e82 3061
5bb644a0
JB		 3062#ifdef CONFIG_PM
3063void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3064{
3065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3066
3067 /*
3068 * we need to use atomic bitops for the running bits
3069 * only because both timers might fire at the same
3070 * time -- the code here is properly synchronised.
3071 */
3072
d1f5b7a3
JB		 3073 cancel_work_sync(&ifmgd->request_smps_work);
3074
0ecfe806 3075 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3076 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3077 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3078 if (del_timer_sync(&ifmgd->timer))
3079 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3080
3081 cancel_work_sync(&ifmgd->chswitch_work);
3082 if (del_timer_sync(&ifmgd->chswitch_timer))
3083 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3084
b291ba11
JB		 3085 /* these will just be re-established on connection */
3086 del_timer_sync(&ifmgd->conn_mon_timer);
3087 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3088}
3089
3090void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3091{
3092 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3093
676b58c2
RM		 3094 if (!ifmgd->associated)
3095 return;
3096
95acac61
JB		 3097 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3098 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3099 mutex_lock(&ifmgd->mtx);
3100 if (ifmgd->associated) {
bdcbd8e0
JB		 3101 mlme_dbg(sdata,
3102 "driver requested disconnect after resume\n");
95acac61
JB		 3103 ieee80211_sta_connection_lost(sdata,
3104 ifmgd->associated->bssid,
3105 WLAN_REASON_UNSPECIFIED);
3106 mutex_unlock(&ifmgd->mtx);
3107 return;
3108 }
3109 mutex_unlock(&ifmgd->mtx);
3110 }
3111
5bb644a0
JB		 3112 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3113 add_timer(&ifmgd->timer);
3114 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3115 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3116 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3117
3118 mutex_lock(&sdata->local->mtx);
46090979 3119 ieee80211_restart_sta_timer(sdata);
925e64c3 3120 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3121}
3122#endif
3123
9c6bd790
JB		 3124/* interface setup */
3125void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3126{
46900298 3127 struct ieee80211_if_managed *ifmgd;
988c0f72 3128
46900298 3129 ifmgd = &sdata->u.mgd;
b291ba11 3130 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3131 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3132 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3133 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3134 INIT_WORK(&ifmgd->csa_connection_drop_work,
3135 ieee80211_csa_connection_drop_work);
d1f5b7a3 3136 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3137 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3138 (unsigned long) sdata);
b291ba11
JB		 3139 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3140 (unsigned long) sdata);
3141 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3142 (unsigned long) sdata);
46900298 3143 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3144 (unsigned long) sdata);
9c6bd790 3145
ab1faead 3146 ifmgd->flags = 0;
1478acb3 3147 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3148 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3149 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3150
77fdaa12 3151 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3152
3153 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3154 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3155 else
3156 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3157}
3158
77fdaa12
JB		 3159/* scan finished notification */
3160void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3161{
31ee67a1 3162 struct ieee80211_sub_if_data *sdata;
60f8b39c 3163
77fdaa12
JB		 3164 /* Restart STA timers */
3165 rcu_read_lock();
3166 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3167 ieee80211_restart_sta_timer(sdata);
3168 rcu_read_unlock();
3169}
60f8b39c 3170
77fdaa12
JB		 3171int ieee80211_max_network_latency(struct notifier_block *nb,
3172 unsigned long data, void *dummy)
3173{
3174 s32 latency_usec = (s32) data;
3175 struct ieee80211_local *local =
3176 container_of(nb, struct ieee80211_local,
3177 network_latency_notifier);
1fa6f4af 3178
77fdaa12
JB		 3179 mutex_lock(&local->iflist_mtx);
3180 ieee80211_recalc_ps(local, latency_usec);
3181 mutex_unlock(&local->iflist_mtx);
dfe67012 3182
77fdaa12 3183 return 0;
9c6bd790
JB		 3184}
3185
b17166a7
JB		 3186static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3187 struct cfg80211_bss *cbss)
a1cf775d
JB		 3188{
3189 struct ieee80211_local *local = sdata->local;
3190 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39
JB		 3191 int ht_cfreq;
3192 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3193 const u8 *ht_oper_ie;
3194 const struct ieee80211_ht_operation *ht_oper = NULL;
3195 struct ieee80211_supported_band *sband;
4bf88530 3196 struct cfg80211_chan_def chandef;
a1cf775d 3197
24398e39
JB		 3198 sband = local->hw.wiphy->bands[cbss->channel->band];
3199
3200 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3201
3202 if (sband->ht_cap.ht_supported) {
3203 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3204 cbss->information_elements,
3205 cbss->len_information_elements);
3206 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3207 ht_oper = (void *)(ht_oper_ie + 2);
3208 }
3209
3210 if (ht_oper) {
3211 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3212 cbss->channel->band);
3213 /* check that channel matches the right operating channel */
3214 if (cbss->channel->center_freq != ht_cfreq) {
3215 /*
3216 * It's possible that some APs are confused here;
3217 * Netgear WNDR3700 sometimes reports 4 higher than
3218 * the actual channel in association responses, but
3219 * since we look at probe response/beacon data here
3220 * it should be OK.
3221 */
bdcbd8e0
JB		 3222 sdata_info(sdata,
3223 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3224 cbss->channel->center_freq,
3225 ht_cfreq, ht_oper->primary_chan,
3226 cbss->channel->band);
24398e39
JB		 3227 ht_oper = NULL;
3228 }
3229 }
3230
76c5fa0f 3231 if (ht_oper) {
3a40414f
JB		 3232 /*
3233 * cfg80211 already verified that the channel itself can
3234 * be used, but it didn't check that we can do the right
3235 * HT type, so do that here as well. If HT40 isn't allowed
3236 * on this channel, disable 40 MHz operation.
3237 */
04ecd257
JB		 3238 const u8 *ht_cap_ie;
3239 const struct ieee80211_ht_cap *ht_cap;
3240 u8 chains = 1;
3241
24398e39
JB		 3242 channel_type = NL80211_CHAN_HT20;
3243
76c5fa0f
JB		 3244 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3245 switch (ht_oper->ht_param &
3246 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3247 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3248 if (cbss->channel->flags &
3249 IEEE80211_CHAN_NO_HT40PLUS)
3250 ifmgd->flags |=
3251 IEEE80211_STA_DISABLE_40MHZ;
3252 else
3253 channel_type = NL80211_CHAN_HT40PLUS;
3254 break;
3255 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3256 if (cbss->channel->flags &
3257 IEEE80211_CHAN_NO_HT40MINUS)
3258 ifmgd->flags |=
3259 IEEE80211_STA_DISABLE_40MHZ;
3260 else
3261 channel_type = NL80211_CHAN_HT40MINUS;
3262 break;
3263 }
24398e39 3264 }
04ecd257
JB		 3265
3266 ht_cap_ie = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY,
3267 cbss->information_elements,
3268 cbss->len_information_elements);
3269 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3270 ht_cap = (void *)(ht_cap_ie + 2);
3271 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3272 }
3273 sdata->needed_rx_chains = min(chains, local->rx_chains);
3274 } else {
3275 sdata->needed_rx_chains = 1;
03ae834f 3276 sdata->u.mgd.flags |= IEEE80211_STA_DISABLE_HT;
24398e39
JB		 3277 }
3278
04ecd257
JB		 3279 /* will change later if needed */
3280 sdata->smps_mode = IEEE80211_SMPS_OFF;
3281
55de908a 3282 ieee80211_vif_release_channel(sdata);
4bf88530
JB		 3283 cfg80211_chandef_create(&chandef, cbss->channel, channel_type);
3284 return ieee80211_vif_use_channel(sdata, &chandef,
55de908a 3285 IEEE80211_CHANCTX_SHARED);
b17166a7
JB		 3286}
3287
3288static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3289 struct cfg80211_bss *cbss, bool assoc)
3290{
3291 struct ieee80211_local *local = sdata->local;
3292 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3293 struct ieee80211_bss *bss = (void *)cbss->priv;
3294 struct sta_info *new_sta = NULL;
3295 bool have_sta = false;
3296 int err;
3297
3298 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3299 return -EINVAL;
3300
3301 if (assoc) {
3302 rcu_read_lock();
3303 have_sta = sta_info_get(sdata, cbss->bssid);
3304 rcu_read_unlock();
3305 }
3306
3307 if (!have_sta) {
3308 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3309 if (!new_sta)
3310 return -ENOMEM;
3311 }
3312
3313 mutex_lock(&local->mtx);
3314 ieee80211_recalc_idle(sdata->local);
3315 mutex_unlock(&local->mtx);
3316
13e0c8e3 3317 if (new_sta) {
5d6a1b06
JB		 3318 u32 rates = 0, basic_rates = 0;
3319 bool have_higher_than_11mbit;
3320 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3321 struct ieee80211_supported_band *sband;
3322
3323 sband = local->hw.wiphy->bands[cbss->channel->band];
3324
3325 err = ieee80211_prep_channel(sdata, cbss);
3326 if (err) {
3327 sta_info_free(local, new_sta);
3328 return err;
3329 }
5d6a1b06 3330
5d6a1b06
JB		 3331 ieee80211_get_rates(sband, bss->supp_rates,
3332 bss->supp_rates_len,
3333 &rates, &basic_rates,
3334 &have_higher_than_11mbit,
3335 &min_rate, &min_rate_index);
3336
3337 /*
3338 * This used to be a workaround for basic rates missing
3339 * in the association response frame. Now that we no
3340 * longer use the basic rates from there, it probably
3341 * doesn't happen any more, but keep the workaround so
3342 * in case some *other* APs are buggy in different ways
3343 * we can connect -- with a warning.
3344 */
3345 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3346 sdata_info(sdata,
3347 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3348 basic_rates = BIT(min_rate_index);
3349 }
3350
13e0c8e3 3351 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3352 sdata->vif.bss_conf.basic_rates = basic_rates;
3353
3354 /* cf. IEEE 802.11 9.2.12 */
55de908a 3355 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3356 have_higher_than_11mbit)
3357 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3358 else
3359 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3360
3361 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3362
8c358bcd
JB		 3363 /* set timing information */
3364 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3365 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3366 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3367
3368 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3369 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3370 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3371 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3372
3373 if (assoc)
13e0c8e3 3374 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3375
13e0c8e3
JB		 3376 err = sta_info_insert(new_sta);
3377 new_sta = NULL;
a1cf775d 3378 if (err) {
bdcbd8e0
JB		 3379 sdata_info(sdata,
3380 "failed to insert STA entry for the AP (error %d)\n",
3381 err);
a1cf775d
JB		 3382 return err;
3383 }
3384 } else
b203ca39 3385 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3386
3387 return 0;
3388}
3389
77fdaa12
JB		 3390/* config hooks */
3391int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3392 struct cfg80211_auth_request *req)
9c6bd790 3393{
66e67e41
JB		 3394 struct ieee80211_local *local = sdata->local;
3395 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3396 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3397 u16 auth_alg;
66e67e41
JB		 3398 int err;
3399
3400 /* prepare auth data structure */
9c6bd790 3401
77fdaa12
JB		 3402 switch (req->auth_type) {
3403 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3404 auth_alg = WLAN_AUTH_OPEN;
3405 break;
3406 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3407 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3408 return -EOPNOTSUPP;
77fdaa12
JB		 3409 auth_alg = WLAN_AUTH_SHARED_KEY;
3410 break;
3411 case NL80211_AUTHTYPE_FT:
3412 auth_alg = WLAN_AUTH_FT;
3413 break;
3414 case NL80211_AUTHTYPE_NETWORK_EAP:
3415 auth_alg = WLAN_AUTH_LEAP;
3416 break;
6b8ece3a
JM		 3417 case NL80211_AUTHTYPE_SAE:
3418 auth_alg = WLAN_AUTH_SAE;
3419 break;
77fdaa12
JB		 3420 default:
3421 return -EOPNOTSUPP;
60f8b39c 3422 }
77fdaa12 3423
6b8ece3a
JM		 3424 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3425 req->ie_len, GFP_KERNEL);
66e67e41 3426 if (!auth_data)
9c6bd790 3427 return -ENOMEM;
77fdaa12 3428
66e67e41 3429 auth_data->bss = req->bss;
77fdaa12 3430
6b8ece3a
JM		 3431 if (req->sae_data_len >= 4) {
3432 __le16 *pos = (__le16 *) req->sae_data;
3433 auth_data->sae_trans = le16_to_cpu(pos[0]);
3434 auth_data->sae_status = le16_to_cpu(pos[1]);
3435 memcpy(auth_data->data, req->sae_data + 4,
3436 req->sae_data_len - 4);
3437 auth_data->data_len += req->sae_data_len - 4;
3438 }
3439
77fdaa12 3440 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3441 memcpy(&auth_data->data[auth_data->data_len],
3442 req->ie, req->ie_len);
3443 auth_data->data_len += req->ie_len;
9c6bd790 3444 }
77fdaa12 3445
fffd0934 3446 if (req->key && req->key_len) {
66e67e41
JB		 3447 auth_data->key_len = req->key_len;
3448 auth_data->key_idx = req->key_idx;
3449 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3450 }
3451
66e67e41 3452 auth_data->algorithm = auth_alg;
60f8b39c 3453
66e67e41 3454 /* try to authenticate/probe */
2a33bee2 3455
66e67e41 3456 mutex_lock(&ifmgd->mtx);
2a33bee2 3457
66e67e41
JB		 3458 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3459 ifmgd->assoc_data) {
3460 err = -EBUSY;
3461 goto err_free;
2a33bee2
GE		 3462 }
3463
66e67e41
JB		 3464 if (ifmgd->auth_data)
3465 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3466
66e67e41
JB		 3467 /* prep auth_data so we don't go into idle on disassoc */
3468 ifmgd->auth_data = auth_data;
af6b6374 3469
66e67e41 3470 if (ifmgd->associated)
37ad3888 3471 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3472
bdcbd8e0 3473 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3474
a1cf775d
JB		 3475 err = ieee80211_prep_connection(sdata, req->bss, false);
3476 if (err)
66e67e41 3477 goto err_clear;
af6b6374 3478
66e67e41
JB		 3479 err = ieee80211_probe_auth(sdata);
3480 if (err) {
66e67e41
JB		 3481 sta_info_destroy_addr(sdata, req->bss->bssid);
3482 goto err_clear;
3483 }
3484
3485 /* hold our own reference */
3486 cfg80211_ref_bss(auth_data->bss);
3487 err = 0;
3488 goto out_unlock;
3489
3490 err_clear:
3d2abdfd
EP		 3491 memset(ifmgd->bssid, 0, ETH_ALEN);
3492 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3493 ifmgd->auth_data = NULL;
3494 err_free:
3495 kfree(auth_data);
3496 out_unlock:
3497 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3498
66e67e41 3499 return err;
af6b6374
JB		 3500}
3501
77fdaa12
JB		 3502int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3503 struct cfg80211_assoc_request *req)
f0706e82 3504{
66e67e41 3505 struct ieee80211_local *local = sdata->local;
77fdaa12 3506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3507 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3508 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3509 struct ieee80211_supported_band *sband;
9dde6423 3510 const u8 *ssidie, *ht_ie;
2a33bee2 3511 int i, err;
f0706e82 3512
66e67e41
JB		 3513 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3514 if (!ssidie)
3515 return -EINVAL;
3516
3517 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3518 if (!assoc_data)
3519 return -ENOMEM;
3520
77fdaa12 3521 mutex_lock(&ifmgd->mtx);
9c87ba67 3522
66e67e41 3523 if (ifmgd->associated)
37ad3888 3524 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3525
3526 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3527 err = -EBUSY;
3528 goto err_free;
af6b6374 3529 }
77fdaa12 3530
66e67e41
JB		 3531 if (ifmgd->assoc_data) {
3532 err = -EBUSY;
3533 goto err_free;
3534 }
77fdaa12 3535
66e67e41
JB		 3536 if (ifmgd->auth_data) {
3537 bool match;
3538
3539 /* keep sta info, bssid if matching */
b203ca39 3540 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3541 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3542 }
3543
66e67e41 3544 /* prepare assoc data */
19c3b830 3545
d8ec4433
JO		 3546 ifmgd->beacon_crc_valid = false;
3547
de5036aa
JB		 3548 /*
3549 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3550 * We still associate in non-HT mode (11a/b/g) if any one of these
3551 * ciphers is configured as pairwise.
3552 * We can set this to true for non-11n hardware, that'll be checked
3553 * separately along with the peer capabilities.
3554 */
1c4cb928 3555 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3556 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3557 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3558 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3559 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3560 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3561 netdev_info(sdata->dev,
d545daba 3562 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3563 }
3564 }
77fdaa12 3565
d545daba 3566 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3567 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3568 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3569 }
ef96a842 3570
4e74bfdb
JB		 3571 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3572 sband = local->hw.wiphy->bands[req->bss->channel->band];
3573 if (!sband->ht_cap.ht_supported ||
1c4cb928 3574 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 3575 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 3576 if (!bss->wmm_used)
3577 netdev_info(sdata->dev,
3578 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3579 }
4e74bfdb 3580
d545daba
MP		 3581 /* disable VHT if we don't support it or the AP doesn't use WMM */
3582 if (!sband->vht_cap.vht_supported ||
3583 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3584 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3585 if (!bss->wmm_used)
3586 netdev_info(sdata->dev,
3587 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3588 }
3589
ef96a842
BG		 3590 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3591 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3592 sizeof(ifmgd->ht_capa_mask));
3593
77fdaa12 3594 if (req->ie && req->ie_len) {
66e67e41
JB		 3595 memcpy(assoc_data->ie, req->ie, req->ie_len);
3596 assoc_data->ie_len = req->ie_len;
3597 }
f679f65d 3598
66e67e41 3599 assoc_data->bss = req->bss;
f679f65d 3600
af6b6374
JB		 3601 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3602 if (ifmgd->powersave)
04ecd257 3603 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3604 else
04ecd257 3605 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3606 } else
04ecd257 3607 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3608
66e67e41 3609 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3610 assoc_data->wmm = bss->wmm_used &&
3611 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3612 assoc_data->supp_rates = bss->supp_rates;
3613 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3614
3615 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3616 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3617 assoc_data->ap_ht_param =
3618 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3619 else
a8243b72 3620 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
63f170e0 3621
ab13315a
KV		 3622 if (bss->wmm_used && bss->uapsd_supported &&
3623 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3624 assoc_data->uapsd = true;
ab13315a
KV		 3625 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3626 } else {
76f0303d 3627 assoc_data->uapsd = false;
ab13315a
KV		 3628 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3629 }
3630
66e67e41
JB		 3631 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3632 assoc_data->ssid_len = ssidie[1];
63f170e0 3633
77fdaa12 3634 if (req->prev_bssid)
66e67e41 3635 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3636
3637 if (req->use_mfp) {
3638 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3639 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3640 } else {
3641 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3642 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3643 }
3644
3645 if (req->crypto.control_port)
3646 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3647 else
3648 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3649
a621fa4d
JB		 3650 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3651 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3652
66e67e41
JB		 3653 /* kick off associate process */
3654
3655 ifmgd->assoc_data = assoc_data;
3656
a1cf775d
JB		 3657 err = ieee80211_prep_connection(sdata, req->bss, true);
3658 if (err)
3659 goto err_clear;
66e67e41
JB		 3660
3661 if (!bss->dtim_period &&
3662 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3663 /*
3664 * Wait up to one beacon interval ...
3665 * should this be more if we miss one?
3666 */
bdcbd8e0
JB		 3667 sdata_info(sdata, "waiting for beacon from %pM\n",
3668 ifmgd->bssid);
3f9768a5 3669 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3670 } else {
3671 assoc_data->have_beacon = true;
3672 assoc_data->sent_assoc = false;
3673 assoc_data->timeout = jiffies;
3674 }
3675 run_again(ifmgd, assoc_data->timeout);
3676
fcff4f10
PS		 3677 if (bss->corrupt_data) {
3678 char *corrupt_type = "data";
3679 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3680 if (bss->corrupt_data &
3681 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3682 corrupt_type = "beacon and probe response";
3683 else
3684 corrupt_type = "beacon";
3685 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3686 corrupt_type = "probe response";
bdcbd8e0
JB		 3687 sdata_info(sdata, "associating with AP with corrupt %s\n",
3688 corrupt_type);
fcff4f10
PS		 3689 }
3690
66e67e41
JB		 3691 err = 0;
3692 goto out;
3693 err_clear:
3d2abdfd
EP		 3694 memset(ifmgd->bssid, 0, ETH_ALEN);
3695 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3696 ifmgd->assoc_data = NULL;
3697 err_free:
3698 kfree(assoc_data);
3699 out:
3700 mutex_unlock(&ifmgd->mtx);
3701
3702 return err;
f0706e82
JB		 3703}
3704
77fdaa12 3705int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3706 struct cfg80211_deauth_request *req)
f0706e82 3707{
46900298 3708 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3709 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 3710 bool tx = !req->local_state_change;
86552017 3711 bool sent_frame = false;
f0706e82 3712
77fdaa12
JB		 3713 mutex_lock(&ifmgd->mtx);
3714
bdcbd8e0
JB		 3715 sdata_info(sdata,
3716 "deauthenticating from %pM by local choice (reason=%d)\n",
3717 req->bssid, req->reason_code);
0ff71613 3718
86552017 3719 if (ifmgd->auth_data) {
8c7d857c 3720 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 3721 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3722 IEEE80211_STYPE_DEAUTH,
6863255b 3723 req->reason_code, tx,
37ad3888 3724 frame_buf);
86552017
JB		 3725 ieee80211_destroy_auth_data(sdata, false);
3726 mutex_unlock(&ifmgd->mtx);
3727
3728 sent_frame = tx;
3729 goto out;
8c7d857c
EG		 3730 }
3731
86552017
JB		 3732 if (ifmgd->associated &&
3733 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
3734 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3735 req->reason_code, tx, frame_buf);
3736 sent_frame = tx;
3737 }
37ad3888
JB		 3738 mutex_unlock(&ifmgd->mtx);
3739
86552017 3740 out:
7da7cc1d 3741 mutex_lock(&sdata->local->mtx);
bc83b681 3742 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3743 mutex_unlock(&sdata->local->mtx);
bc83b681 3744
86552017
JB		 3745 if (sent_frame)
3746 __cfg80211_send_deauth(sdata->dev, frame_buf,
3747 IEEE80211_DEAUTH_FRAME_LEN);
3748
f0706e82
JB		 3749 return 0;
3750}
84363e6e 3751
77fdaa12 3752int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3753 struct cfg80211_disassoc_request *req)
9c6bd790 3754{
77fdaa12 3755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3756 u8 bssid[ETH_ALEN];
6ae16775 3757 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 3758
77fdaa12 3759 mutex_lock(&ifmgd->mtx);
10f644a4 3760
8d8b261a
JB		 3761 /*
3762 * cfg80211 should catch this ... but it's racy since
3763 * we can receive a disassoc frame, process it, hand it
3764 * to cfg80211 while that's in a locked section already
3765 * trying to tell us that the user wants to disconnect.
3766 */
0c1ad2ca 3767 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3768 mutex_unlock(&ifmgd->mtx);
3769 return -ENOLINK;
3770 }
3771
bdcbd8e0
JB		 3772 sdata_info(sdata,
3773 "disassociating from %pM by local choice (reason=%d)\n",
3774 req->bss->bssid, req->reason_code);
0ff71613 3775
e69e95db 3776 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3777 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3778 req->reason_code, !req->local_state_change,
3779 frame_buf);
77fdaa12 3780 mutex_unlock(&ifmgd->mtx);
10f644a4 3781
6ae16775
AQ		 3782 __cfg80211_send_disassoc(sdata->dev, frame_buf,
3783 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 3784
7da7cc1d 3785 mutex_lock(&sdata->local->mtx);
bc83b681 3786 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3787 mutex_unlock(&sdata->local->mtx);
bc83b681 3788
10f644a4
JB		 3789 return 0;
3790}
026331c4 3791
afa762f6 3792void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3793{
3794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3795
3796 mutex_lock(&ifmgd->mtx);
3797 if (ifmgd->assoc_data)
3798 ieee80211_destroy_assoc_data(sdata, false);
3799 if (ifmgd->auth_data)
3800 ieee80211_destroy_auth_data(sdata, false);
3801 del_timer_sync(&ifmgd->timer);
3802 mutex_unlock(&ifmgd->mtx);
3803}
3804
a97c13c3
JO		 3805void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3806 enum nl80211_cqm_rssi_threshold_event rssi_event,
3807 gfp_t gfp)
3808{
3809 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3810
b5878a2d
JB		 3811 trace_api_cqm_rssi_notify(sdata, rssi_event);
3812
a97c13c3
JO		 3813 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3814}
3815EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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