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wireless: add utility function to get P2P attribute
[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 }
194 chan = chanctx_conf->channel;
195 rcu_read_unlock();
196 sband = local->hw.wiphy->bands[chan->band];
d5522e03 197
64f68e5d
JB		 198 switch (sdata->vif.bss_conf.channel_type) {
199 case NL80211_CHAN_HT40PLUS:
55de908a 200 if (chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d
JB		 201 disable_40 = true;
202 break;
203 case NL80211_CHAN_HT40MINUS:
55de908a 204 if (chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d
JB		 205 disable_40 = true;
206 break;
207 default:
208 break;
209 }
d5522e03 210
24398e39
JB		 211 /* This can change during the lifetime of the BSS */
212 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 213 disable_40 = true;
214
215 mutex_lock(&local->sta_mtx);
216 sta = sta_info_get(sdata, bssid);
d5522e03 217
64f68e5d
JB		 218 WARN_ON_ONCE(!sta);
219
220 if (sta && !sta->supports_40mhz)
221 disable_40 = true;
222
223 if (sta && (!reconfig ||
91a0099c 224 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 225 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 226
64f68e5d
JB		 227 if (disable_40)
228 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
229 else
230 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 231
64f68e5d 232 rate_control_rate_update(local, sband, sta,
8f727ef3 233 IEEE80211_RC_BW_CHANGED);
0aaffa9b 234 }
64f68e5d 235 mutex_unlock(&local->sta_mtx);
d5522e03 236
074d46d1 237 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 238
239 /* if bss configuration changed store the new one */
24398e39 240 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 241 changed |= BSS_CHANGED_HT;
9ed6bcce 242 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 243 }
244
245 return changed;
246}
247
9c6bd790
JB		 248/* frame sending functions */
249
66e67e41
JB		 250static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
251 struct ieee80211_supported_band *sband,
252 u32 *rates)
253{
254 int i, j, count;
255 *rates = 0;
256 count = 0;
257 for (i = 0; i < supp_rates_len; i++) {
258 int rate = (supp_rates[i] & 0x7F) * 5;
259
260 for (j = 0; j < sband->n_bitrates; j++)
261 if (sband->bitrates[j].bitrate == rate) {
262 *rates |= BIT(j);
263 count++;
264 break;
265 }
266 }
267
268 return count;
269}
270
271static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 272 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 273 struct ieee80211_supported_band *sband,
274 struct ieee80211_channel *channel,
275 enum ieee80211_smps_mode smps)
276{
66e67e41
JB		 277 u8 *pos;
278 u32 flags = channel->flags;
279 u16 cap;
280 struct ieee80211_sta_ht_cap ht_cap;
281
282 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
283
66e67e41
JB		 284 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
285 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
286
66e67e41
JB		 287 /* determine capability flags */
288 cap = ht_cap.cap;
289
9dde6423 290 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 291 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
292 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
293 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
294 cap &= ~IEEE80211_HT_CAP_SGI_40;
295 }
296 break;
297 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
298 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
299 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
300 cap &= ~IEEE80211_HT_CAP_SGI_40;
301 }
302 break;
303 }
304
24398e39
JB		 305 /*
306 * If 40 MHz was disabled associate as though we weren't
307 * capable of 40 MHz -- some broken APs will never fall
308 * back to trying to transmit in 20 MHz.
309 */
310 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
311 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
312 cap &= ~IEEE80211_HT_CAP_SGI_40;
313 }
314
66e67e41
JB		 315 /* set SM PS mode properly */
316 cap &= ~IEEE80211_HT_CAP_SM_PS;
317 switch (smps) {
318 case IEEE80211_SMPS_AUTOMATIC:
319 case IEEE80211_SMPS_NUM_MODES:
320 WARN_ON(1);
321 case IEEE80211_SMPS_OFF:
322 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
323 IEEE80211_HT_CAP_SM_PS_SHIFT;
324 break;
325 case IEEE80211_SMPS_STATIC:
326 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
327 IEEE80211_HT_CAP_SM_PS_SHIFT;
328 break;
329 case IEEE80211_SMPS_DYNAMIC:
330 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
331 IEEE80211_HT_CAP_SM_PS_SHIFT;
332 break;
333 }
334
335 /* reserve and fill IE */
336 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
337 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
338}
339
d545daba
MP		 340static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
341 struct sk_buff *skb,
342 struct ieee80211_supported_band *sband)
343{
344 u8 *pos;
345 u32 cap;
346 struct ieee80211_sta_vht_cap vht_cap;
347
348 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
349
350 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
351
352 /* determine capability flags */
353 cap = vht_cap.cap;
354
355 /* reserve and fill IE */
d4950281 356 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 357 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
358}
359
66e67e41
JB		 360static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
361{
362 struct ieee80211_local *local = sdata->local;
363 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
364 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
365 struct sk_buff *skb;
366 struct ieee80211_mgmt *mgmt;
367 u8 *pos, qos_info;
368 size_t offset = 0, noffset;
369 int i, count, rates_len, supp_rates_len;
370 u16 capab;
371 struct ieee80211_supported_band *sband;
55de908a
JB		 372 struct ieee80211_chanctx_conf *chanctx_conf;
373 struct ieee80211_channel *chan;
66e67e41 374 u32 rates = 0;
66e67e41
JB		 375
376 lockdep_assert_held(&ifmgd->mtx);
377
55de908a
JB		 378 rcu_read_lock();
379 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
380 if (WARN_ON(!chanctx_conf)) {
381 rcu_read_unlock();
382 return;
383 }
384 chan = chanctx_conf->channel;
385 rcu_read_unlock();
386 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 387
388 if (assoc_data->supp_rates_len) {
389 /*
390 * Get all rates supported by the device and the AP as
391 * some APs don't like getting a superset of their rates
392 * in the association request (e.g. D-Link DAP 1353 in
393 * b-only mode)...
394 */
395 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
396 assoc_data->supp_rates_len,
397 sband, &rates);
398 } else {
399 /*
400 * In case AP not provide any supported rates information
401 * before association, we send information element(s) with
402 * all rates that we support.
403 */
404 rates = ~0;
405 rates_len = sband->n_bitrates;
406 }
407
408 skb = alloc_skb(local->hw.extra_tx_headroom +
409 sizeof(*mgmt) + /* bit too much but doesn't matter */
410 2 + assoc_data->ssid_len + /* SSID */
411 4 + rates_len + /* (extended) rates */
412 4 + /* power capability */
413 2 + 2 * sband->n_channels + /* supported channels */
414 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 415 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 416 assoc_data->ie_len + /* extra IEs */
417 9, /* WMM */
418 GFP_KERNEL);
419 if (!skb)
420 return;
421
422 skb_reserve(skb, local->hw.extra_tx_headroom);
423
424 capab = WLAN_CAPABILITY_ESS;
425
426 if (sband->band == IEEE80211_BAND_2GHZ) {
427 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
428 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
429 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
430 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
431 }
432
433 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
434 capab |= WLAN_CAPABILITY_PRIVACY;
435
436 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
437 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
438 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
439
440 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
441 memset(mgmt, 0, 24);
442 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
443 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
444 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
445
446 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
447 skb_put(skb, 10);
448 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
449 IEEE80211_STYPE_REASSOC_REQ);
450 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
451 mgmt->u.reassoc_req.listen_interval =
452 cpu_to_le16(local->hw.conf.listen_interval);
453 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
454 ETH_ALEN);
455 } else {
456 skb_put(skb, 4);
457 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
458 IEEE80211_STYPE_ASSOC_REQ);
459 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
460 mgmt->u.assoc_req.listen_interval =
461 cpu_to_le16(local->hw.conf.listen_interval);
462 }
463
464 /* SSID */
465 pos = skb_put(skb, 2 + assoc_data->ssid_len);
466 *pos++ = WLAN_EID_SSID;
467 *pos++ = assoc_data->ssid_len;
468 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
469
470 /* add all rates which were marked to be used above */
471 supp_rates_len = rates_len;
472 if (supp_rates_len > 8)
473 supp_rates_len = 8;
474
475 pos = skb_put(skb, supp_rates_len + 2);
476 *pos++ = WLAN_EID_SUPP_RATES;
477 *pos++ = supp_rates_len;
478
479 count = 0;
480 for (i = 0; i < sband->n_bitrates; i++) {
481 if (BIT(i) & rates) {
482 int rate = sband->bitrates[i].bitrate;
483 *pos++ = (u8) (rate / 5);
484 if (++count == 8)
485 break;
486 }
487 }
488
489 if (rates_len > count) {
490 pos = skb_put(skb, rates_len - count + 2);
491 *pos++ = WLAN_EID_EXT_SUPP_RATES;
492 *pos++ = rates_len - count;
493
494 for (i++; i < sband->n_bitrates; i++) {
495 if (BIT(i) & rates) {
496 int rate = sband->bitrates[i].bitrate;
497 *pos++ = (u8) (rate / 5);
498 }
499 }
500 }
501
502 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
503 /* 1. power capabilities */
504 pos = skb_put(skb, 4);
505 *pos++ = WLAN_EID_PWR_CAPABILITY;
506 *pos++ = 2;
507 *pos++ = 0; /* min tx power */
55de908a 508 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 509
510 /* 2. supported channels */
511 /* TODO: get this in reg domain format */
512 pos = skb_put(skb, 2 * sband->n_channels + 2);
513 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
514 *pos++ = 2 * sband->n_channels;
515 for (i = 0; i < sband->n_channels; i++) {
516 *pos++ = ieee80211_frequency_to_channel(
517 sband->channels[i].center_freq);
518 *pos++ = 1; /* one channel in the subband*/
519 }
520 }
521
522 /* if present, add any custom IEs that go before HT */
523 if (assoc_data->ie_len && assoc_data->ie) {
524 static const u8 before_ht[] = {
525 WLAN_EID_SSID,
526 WLAN_EID_SUPP_RATES,
527 WLAN_EID_EXT_SUPP_RATES,
528 WLAN_EID_PWR_CAPABILITY,
529 WLAN_EID_SUPPORTED_CHANNELS,
530 WLAN_EID_RSN,
531 WLAN_EID_QOS_CAPA,
532 WLAN_EID_RRM_ENABLED_CAPABILITIES,
533 WLAN_EID_MOBILITY_DOMAIN,
534 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
535 };
536 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
537 before_ht, ARRAY_SIZE(before_ht),
538 offset);
539 pos = skb_put(skb, noffset - offset);
540 memcpy(pos, assoc_data->ie + offset, noffset - offset);
541 offset = noffset;
542 }
543
4e74bfdb 544 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
9dde6423 545 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 546 sband, chan, sdata->smps_mode);
66e67e41 547
d545daba
MP		 548 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
549 ieee80211_add_vht_ie(sdata, skb, sband);
550
66e67e41
JB		 551 /* if present, add any custom non-vendor IEs that go after HT */
552 if (assoc_data->ie_len && assoc_data->ie) {
553 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
554 assoc_data->ie_len,
555 offset);
556 pos = skb_put(skb, noffset - offset);
557 memcpy(pos, assoc_data->ie + offset, noffset - offset);
558 offset = noffset;
559 }
560
76f0303d
JB		 561 if (assoc_data->wmm) {
562 if (assoc_data->uapsd) {
dc41e4d4
EP		 563 qos_info = ifmgd->uapsd_queues;
564 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 565 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
566 } else {
567 qos_info = 0;
568 }
569
570 pos = skb_put(skb, 9);
571 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
572 *pos++ = 7; /* len */
573 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
574 *pos++ = 0x50;
575 *pos++ = 0xf2;
576 *pos++ = 2; /* WME */
577 *pos++ = 0; /* WME info */
578 *pos++ = 1; /* WME ver */
579 *pos++ = qos_info;
580 }
581
582 /* add any remaining custom (i.e. vendor specific here) IEs */
583 if (assoc_data->ie_len && assoc_data->ie) {
584 noffset = assoc_data->ie_len;
585 pos = skb_put(skb, noffset - offset);
586 memcpy(pos, assoc_data->ie + offset, noffset - offset);
587 }
588
a1845fc7
JB		 589 drv_mgd_prepare_tx(local, sdata);
590
66e67e41
JB		 591 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
592 ieee80211_tx_skb(sdata, skb);
593}
594
572e0012
KV		 595void ieee80211_send_pspoll(struct ieee80211_local *local,
596 struct ieee80211_sub_if_data *sdata)
597{
572e0012
KV		 598 struct ieee80211_pspoll *pspoll;
599 struct sk_buff *skb;
572e0012 600
d8cd189e
KV		 601 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
602 if (!skb)
572e0012 603 return;
572e0012 604
d8cd189e
KV		 605 pspoll = (struct ieee80211_pspoll *) skb->data;
606 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 607
62ae67be
JB		 608 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
609 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 610}
611
965bedad
JB		 612void ieee80211_send_nullfunc(struct ieee80211_local *local,
613 struct ieee80211_sub_if_data *sdata,
614 int powersave)
615{
616 struct sk_buff *skb;
d8cd189e 617 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 618 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 619
d8cd189e
KV		 620 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
621 if (!skb)
965bedad 622 return;
965bedad 623
d8cd189e 624 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 625 if (powersave)
d8cd189e 626 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 627
62ae67be 628 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 629 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
630 IEEE80211_STA_CONNECTION_POLL))
631 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
632
62ae67be 633 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 634}
635
d524215f
FF		 636static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
637 struct ieee80211_sub_if_data *sdata)
638{
639 struct sk_buff *skb;
640 struct ieee80211_hdr *nullfunc;
641 __le16 fc;
642
643 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
644 return;
645
646 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 647 if (!skb)
d524215f 648 return;
d15b8459 649
d524215f
FF		 650 skb_reserve(skb, local->hw.extra_tx_headroom);
651
652 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
653 memset(nullfunc, 0, 30);
654 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
655 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
656 nullfunc->frame_control = fc;
657 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
658 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
659 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
660 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
661
662 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
663 ieee80211_tx_skb(sdata, skb);
664}
665
cc32abd4
JB		 666/* spectrum management related things */
667static void ieee80211_chswitch_work(struct work_struct *work)
668{
669 struct ieee80211_sub_if_data *sdata =
670 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 671 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
672
9607e6b6 673 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 674 return;
675
77fdaa12
JB		 676 mutex_lock(&ifmgd->mtx);
677 if (!ifmgd->associated)
678 goto out;
cc32abd4 679
55de908a 680 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 681 if (!sdata->local->ops->channel_switch) {
682 /* call "hw_config" only if doing sw channel switch */
683 ieee80211_hw_config(sdata->local,
684 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 685 } else {
686 /* update the device channel directly */
55de908a 687 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 688 }
77fdaa12 689
cc32abd4 690 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 691 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 692
57eebdf3 693 /* XXX: wait for a beacon first? */
cc32abd4
JB		 694 ieee80211_wake_queues_by_reason(&sdata->local->hw,
695 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 696 out:
697 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
698 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 699}
700
5ce6e438
JB		 701void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
702{
55de908a
JB		 703 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
704 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 705
706 trace_api_chswitch_done(sdata, success);
707 if (!success) {
882a7c69
JB		 708 sdata_info(sdata,
709 "driver channel switch failed, disconnecting\n");
710 ieee80211_queue_work(&sdata->local->hw,
711 &ifmgd->csa_connection_drop_work);
712 } else {
713 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 714 }
5ce6e438
JB		 715}
716EXPORT_SYMBOL(ieee80211_chswitch_done);
717
cc32abd4
JB		 718static void ieee80211_chswitch_timer(unsigned long data)
719{
720 struct ieee80211_sub_if_data *sdata =
721 (struct ieee80211_sub_if_data *) data;
722 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
723
5bb644a0
JB		 724 if (sdata->local->quiescing) {
725 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
726 return;
727 }
728
42935eca 729 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 730}
731
732void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
733 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 734 struct ieee80211_bss *bss,
735 u64 timestamp)
cc32abd4 736{
0c1ad2ca
JB		 737 struct cfg80211_bss *cbss =
738 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 739 struct ieee80211_channel *new_ch;
740 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 741 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
742 cbss->channel->band);
55de908a 743 struct ieee80211_chanctx *chanctx;
cc32abd4 744
77fdaa12
JB		 745 ASSERT_MGD_MTX(ifmgd);
746
747 if (!ifmgd->associated)
cc32abd4
JB		 748 return;
749
fbe9c429 750 if (sdata->local->scanning)
cc32abd4
JB		 751 return;
752
753 /* Disregard subsequent beacons if we are already running a timer
754 processing a CSA */
755
756 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
757 return;
758
759 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 760 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
761 sdata_info(sdata,
762 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
763 ifmgd->associated->bssid, new_freq);
764 ieee80211_queue_work(&sdata->local->hw,
765 &ifmgd->csa_connection_drop_work);
cc32abd4 766 return;
882a7c69 767 }
cc32abd4 768
57eebdf3
JB		 769 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
770
55de908a
JB		 771 if (sdata->local->use_chanctx) {
772 sdata_info(sdata,
773 "not handling channel switch with channel contexts\n");
774 ieee80211_queue_work(&sdata->local->hw,
775 &ifmgd->csa_connection_drop_work);
776 }
777
778 mutex_lock(&sdata->local->chanctx_mtx);
779 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
780 mutex_unlock(&sdata->local->chanctx_mtx);
781 return;
782 }
783 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
784 struct ieee80211_chanctx, conf);
785 if (chanctx->refcount > 1) {
786 sdata_info(sdata,
787 "channel switch with multiple interfaces on the same channel, disconnecting\n");
788 ieee80211_queue_work(&sdata->local->hw,
789 &ifmgd->csa_connection_drop_work);
790 mutex_unlock(&sdata->local->chanctx_mtx);
791 return;
792 }
793 mutex_unlock(&sdata->local->chanctx_mtx);
794
795 sdata->local->csa_channel = new_ch;
796
57eebdf3
JB		 797 if (sw_elem->mode)
798 ieee80211_stop_queues_by_reason(&sdata->local->hw,
799 IEEE80211_QUEUE_STOP_REASON_CSA);
800
5ce6e438
JB		 801 if (sdata->local->ops->channel_switch) {
802 /* use driver's channel switch callback */
57eebdf3
JB		 803 struct ieee80211_channel_switch ch_switch = {
804 .timestamp = timestamp,
805 .block_tx = sw_elem->mode,
806 .channel = new_ch,
807 .count = sw_elem->count,
808 };
809
5ce6e438
JB		 810 drv_channel_switch(sdata->local, &ch_switch);
811 return;
812 }
813
814 /* channel switch handled in software */
57eebdf3 815 if (sw_elem->count <= 1)
42935eca 816 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 817 else
cc32abd4 818 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 819 TU_TO_EXP_TIME(sw_elem->count *
820 cbss->beacon_interval));
cc32abd4
JB		 821}
822
1ea6f9c0
JB		 823static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
824 struct ieee80211_channel *channel,
825 const u8 *country_ie, u8 country_ie_len,
826 const u8 *pwr_constr_elem)
cc32abd4 827{
04b7b2ff
JB		 828 struct ieee80211_country_ie_triplet *triplet;
829 int chan = ieee80211_frequency_to_channel(channel->center_freq);
830 int i, chan_pwr, chan_increment, new_ap_level;
831 bool have_chan_pwr = false;
cc32abd4 832
04b7b2ff
JB		 833 /* Invalid IE */
834 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 835 return 0;
cc32abd4 836
04b7b2ff
JB		 837 triplet = (void *)(country_ie + 3);
838 country_ie_len -= 3;
839
840 switch (channel->band) {
841 default:
842 WARN_ON_ONCE(1);
843 /* fall through */
844 case IEEE80211_BAND_2GHZ:
845 case IEEE80211_BAND_60GHZ:
846 chan_increment = 1;
847 break;
848 case IEEE80211_BAND_5GHZ:
849 chan_increment = 4;
850 break;
cc32abd4 851 }
04b7b2ff
JB		 852
853 /* find channel */
854 while (country_ie_len >= 3) {
855 u8 first_channel = triplet->chans.first_channel;
856
857 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
858 goto next;
859
860 for (i = 0; i < triplet->chans.num_channels; i++) {
861 if (first_channel + i * chan_increment == chan) {
862 have_chan_pwr = true;
863 chan_pwr = triplet->chans.max_power;
864 break;
865 }
866 }
867 if (have_chan_pwr)
868 break;
869
870 next:
871 triplet++;
872 country_ie_len -= 3;
873 }
874
875 if (!have_chan_pwr)
1ea6f9c0 876 return 0;
04b7b2ff
JB		 877
878 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
879
1ea6f9c0
JB		 880 if (sdata->ap_power_level == new_ap_level)
881 return 0;
04b7b2ff
JB		 882
883 sdata_info(sdata,
884 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
885 new_ap_level, chan_pwr, *pwr_constr_elem,
886 sdata->u.mgd.bssid);
1ea6f9c0
JB		 887 sdata->ap_power_level = new_ap_level;
888 if (__ieee80211_recalc_txpower(sdata))
889 return BSS_CHANGED_TXPOWER;
890 return 0;
cc32abd4
JB		 891}
892
f90754c1
JO		 893void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
894{
895 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
896 struct ieee80211_local *local = sdata->local;
897 struct ieee80211_conf *conf = &local->hw.conf;
898
899 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
900 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
901 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
902
903 local->disable_dynamic_ps = false;
904 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
905}
906EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
907
908void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
909{
910 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
911 struct ieee80211_local *local = sdata->local;
912 struct ieee80211_conf *conf = &local->hw.conf;
913
914 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
915 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
916 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
917
918 local->disable_dynamic_ps = true;
919 conf->dynamic_ps_timeout = 0;
920 del_timer_sync(&local->dynamic_ps_timer);
921 ieee80211_queue_work(&local->hw,
922 &local->dynamic_ps_enable_work);
923}
924EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
925
965bedad
JB		 926/* powersave */
927static void ieee80211_enable_ps(struct ieee80211_local *local,
928 struct ieee80211_sub_if_data *sdata)
929{
930 struct ieee80211_conf *conf = &local->hw.conf;
931
d5edaedc
JB		 932 /*
933 * If we are scanning right now then the parameters will
934 * take effect when scan finishes.
935 */
fbe9c429 936 if (local->scanning)
d5edaedc
JB		 937 return;
938
965bedad
JB		 939 if (conf->dynamic_ps_timeout > 0 &&
940 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
941 mod_timer(&local->dynamic_ps_timer, jiffies +
942 msecs_to_jiffies(conf->dynamic_ps_timeout));
943 } else {
944 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
945 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 946
2a13052f
JO		 947 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
948 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
949 return;
950
951 conf->flags |= IEEE80211_CONF_PS;
952 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 953 }
954}
955
956static void ieee80211_change_ps(struct ieee80211_local *local)
957{
958 struct ieee80211_conf *conf = &local->hw.conf;
959
960 if (local->ps_sdata) {
965bedad
JB		 961 ieee80211_enable_ps(local, local->ps_sdata);
962 } else if (conf->flags & IEEE80211_CONF_PS) {
963 conf->flags &= ~IEEE80211_CONF_PS;
964 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965 del_timer_sync(&local->dynamic_ps_timer);
966 cancel_work_sync(&local->dynamic_ps_enable_work);
967 }
968}
969
808118cb
JY		 970static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
971{
972 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
973 struct sta_info *sta = NULL;
c2c98fde 974 bool authorized = false;
808118cb
JY		 975
976 if (!mgd->powersave)
977 return false;
978
05cb9108
JB		 979 if (mgd->broken_ap)
980 return false;
981
808118cb
JY		 982 if (!mgd->associated)
983 return false;
984
808118cb
JY		 985 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
986 IEEE80211_STA_CONNECTION_POLL))
987 return false;
988
989 rcu_read_lock();
990 sta = sta_info_get(sdata, mgd->bssid);
991 if (sta)
c2c98fde 992 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 993 rcu_read_unlock();
994
c2c98fde 995 return authorized;
808118cb
JY		 996}
997
965bedad 998/* need to hold RTNL or interface lock */
10f644a4 999void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1000{
1001 struct ieee80211_sub_if_data *sdata, *found = NULL;
1002 int count = 0;
195e294d 1003 int timeout;
965bedad
JB		 1004
1005 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1006 local->ps_sdata = NULL;
1007 return;
1008 }
1009
1010 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1011 if (!ieee80211_sdata_running(sdata))
965bedad 1012 continue;
8c7914de
RM		 1013 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1014 /* If an AP vif is found, then disable PS
1015 * by setting the count to zero thereby setting
1016 * ps_sdata to NULL.
1017 */
1018 count = 0;
1019 break;
1020 }
965bedad
JB		 1021 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1022 continue;
1023 found = sdata;
1024 count++;
1025 }
1026
808118cb 1027 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1028 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1029 s32 beaconint_us;
1030
1031 if (latency < 0)
ed77134b 1032 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1033
1034 beaconint_us = ieee80211_tu_to_usec(
1035 found->vif.bss_conf.beacon_int);
1036
ff616381 1037 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1038 if (timeout < 0) {
1039 /*
ff616381
JO		 1040 * Go to full PSM if the user configures a very low
1041 * latency requirement.
0ab82b04
EP		 1042 * The 2000 second value is there for compatibility
1043 * until the PM_QOS_NETWORK_LATENCY is configured
1044 * with real values.
195e294d 1045 */
0ab82b04
EP		 1046 if (latency > (1900 * USEC_PER_MSEC) &&
1047 latency != (2000 * USEC_PER_SEC))
195e294d 1048 timeout = 0;
ff616381
JO		 1049 else
1050 timeout = 100;
195e294d 1051 }
f90754c1
JO		 1052 local->dynamic_ps_user_timeout = timeout;
1053 if (!local->disable_dynamic_ps)
1054 conf->dynamic_ps_timeout =
1055 local->dynamic_ps_user_timeout;
195e294d 1056
04fe2037 1057 if (beaconint_us > latency) {
10f644a4 1058 local->ps_sdata = NULL;
04fe2037 1059 } else {
56007a02 1060 struct ieee80211_bss *bss;
04fe2037 1061 int maxslp = 1;
56007a02 1062 u8 dtimper;
04fe2037 1063
56007a02
JB		 1064 bss = (void *)found->u.mgd.associated->priv;
1065 dtimper = bss->dtim_period;
1066
1067 /* If the TIM IE is invalid, pretend the value is 1 */
1068 if (!dtimper)
1069 dtimper = 1;
1070 else if (dtimper > 1)
04fe2037
JB		 1071 maxslp = min_t(int, dtimper,
1072 latency / beaconint_us);
1073
9ccebe61 1074 local->hw.conf.max_sleep_period = maxslp;
56007a02 1075 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1076 local->ps_sdata = found;
04fe2037 1077 }
10f644a4 1078 } else {
965bedad 1079 local->ps_sdata = NULL;
10f644a4 1080 }
965bedad
JB		 1081
1082 ieee80211_change_ps(local);
1083}
1084
ab095877
EP		 1085void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1086{
1087 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1088
1089 if (sdata->vif.bss_conf.ps != ps_allowed) {
1090 sdata->vif.bss_conf.ps = ps_allowed;
1091 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1092 }
1093}
1094
965bedad
JB		 1095void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1096{
1097 struct ieee80211_local *local =
1098 container_of(work, struct ieee80211_local,
1099 dynamic_ps_disable_work);
1100
1101 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1102 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1103 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1104 }
1105
1106 ieee80211_wake_queues_by_reason(&local->hw,
1107 IEEE80211_QUEUE_STOP_REASON_PS);
1108}
1109
1110void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1111{
1112 struct ieee80211_local *local =
1113 container_of(work, struct ieee80211_local,
1114 dynamic_ps_enable_work);
1115 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1116 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1117 unsigned long flags;
1118 int q;
965bedad
JB		 1119
1120 /* can only happen when PS was just disabled anyway */
1121 if (!sdata)
1122 return;
1123
5e34069c
CL		 1124 ifmgd = &sdata->u.mgd;
1125
965bedad
JB		 1126 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1127 return;
1128
77b7023a
AN		 1129 if (!local->disable_dynamic_ps &&
1130 local->hw.conf.dynamic_ps_timeout > 0) {
1131 /* don't enter PS if TX frames are pending */
1132 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1133 mod_timer(&local->dynamic_ps_timer, jiffies +
1134 msecs_to_jiffies(
1135 local->hw.conf.dynamic_ps_timeout));
1136 return;
1137 }
77b7023a
AN		 1138
1139 /*
1140 * transmission can be stopped by others which leads to
1141 * dynamic_ps_timer expiry. Postpone the ps timer if it
1142 * is not the actual idle state.
1143 */
1144 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1145 for (q = 0; q < local->hw.queues; q++) {
1146 if (local->queue_stop_reasons[q]) {
1147 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1148 flags);
1149 mod_timer(&local->dynamic_ps_timer, jiffies +
1150 msecs_to_jiffies(
1151 local->hw.conf.dynamic_ps_timeout));
1152 return;
1153 }
1154 }
1155 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1156 }
1ddc2867 1157
375177bf 1158 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1159 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1160 netif_tx_stop_all_queues(sdata->dev);
965bedad 1161
e8306f98
VN		 1162 if (drv_tx_frames_pending(local))
1163 mod_timer(&local->dynamic_ps_timer, jiffies +
1164 msecs_to_jiffies(
1165 local->hw.conf.dynamic_ps_timeout));
1166 else {
1167 ieee80211_send_nullfunc(local, sdata, 1);
1168 /* Flush to get the tx status of nullfunc frame */
1169 drv_flush(local, false);
1170 }
f3e85b9e
VN		 1171 }
1172
2a13052f
JO		 1173 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1174 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1175 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1176 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1177 local->hw.conf.flags |= IEEE80211_CONF_PS;
1178 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1179 }
f3e85b9e 1180
77b7023a
AN		 1181 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1182 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1183}
1184
1185void ieee80211_dynamic_ps_timer(unsigned long data)
1186{
1187 struct ieee80211_local *local = (void *) data;
1188
78f1a8b7 1189 if (local->quiescing || local->suspended)
5bb644a0
JB		 1190 return;
1191
42935eca 1192 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1193}
1194
60f8b39c 1195/* MLME */
7d25745d 1196static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1197 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1198 u8 *wmm_param, size_t wmm_param_len)
1199{
f0706e82 1200 struct ieee80211_tx_queue_params params;
4ced3f74 1201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1202 size_t left;
1203 int count;
ab13315a 1204 u8 *pos, uapsd_queues = 0;
f0706e82 1205
e1b3ec1a 1206 if (!local->ops->conf_tx)
7d25745d 1207 return false;
e1b3ec1a 1208
32c5057b 1209 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1210 return false;
3434fbd3
JB		 1211
1212 if (!wmm_param)
7d25745d 1213 return false;
3434fbd3 1214
f0706e82 1215 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1216 return false;
ab13315a
KV		 1217
1218 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1219 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1220
f0706e82 1221 count = wmm_param[6] & 0x0f;
46900298 1222 if (count == ifmgd->wmm_last_param_set)
7d25745d 1223 return false;
46900298 1224 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1225
1226 pos = wmm_param + 8;
1227 left = wmm_param_len - 8;
1228
1229 memset(&params, 0, sizeof(params));
1230
00e96dec 1231 sdata->wmm_acm = 0;
f0706e82
JB		 1232 for (; left >= 4; left -= 4, pos += 4) {
1233 int aci = (pos[0] >> 5) & 0x03;
1234 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1235 bool uapsd = false;
f0706e82
JB		 1236 int queue;
1237
1238 switch (aci) {
0eeb59fe 1239 case 1: /* AC_BK */
e100bb64 1240 queue = 3;
988c0f72 1241 if (acm)
00e96dec 1242 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1243 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1244 uapsd = true;
f0706e82 1245 break;
0eeb59fe 1246 case 2: /* AC_VI */
e100bb64 1247 queue = 1;
988c0f72 1248 if (acm)
00e96dec 1249 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1250 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1251 uapsd = true;
f0706e82 1252 break;
0eeb59fe 1253 case 3: /* AC_VO */
e100bb64 1254 queue = 0;
988c0f72 1255 if (acm)
00e96dec 1256 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1257 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1258 uapsd = true;
f0706e82 1259 break;
0eeb59fe 1260 case 0: /* AC_BE */
f0706e82 1261 default:
e100bb64 1262 queue = 2;
988c0f72 1263 if (acm)
00e96dec 1264 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1265 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1266 uapsd = true;
f0706e82
JB		 1267 break;
1268 }
1269
1270 params.aifs = pos[0] & 0x0f;
1271 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1272 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1273 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1274 params.uapsd = uapsd;
1275
bdcbd8e0
JB		 1276 mlme_dbg(sdata,
1277 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1278 queue, aci, acm,
1279 params.aifs, params.cw_min, params.cw_max,
1280 params.txop, params.uapsd);
f6f3def3
EP		 1281 sdata->tx_conf[queue] = params;
1282 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1283 sdata_err(sdata,
1284 "failed to set TX queue parameters for queue %d\n",
1285 queue);
f0706e82 1286 }
e1b3ec1a
SG		 1287
1288 /* enable WMM or activate new settings */
4ced3f74 1289 sdata->vif.bss_conf.qos = true;
7d25745d 1290 return true;
f0706e82
JB		 1291}
1292
925e64c3
SG		 1293static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1294{
1295 lockdep_assert_held(&sdata->local->mtx);
1296
1297 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1298 IEEE80211_STA_BEACON_POLL);
1299 ieee80211_run_deferred_scan(sdata->local);
1300}
1301
1302static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1303{
1304 mutex_lock(&sdata->local->mtx);
1305 __ieee80211_stop_poll(sdata);
1306 mutex_unlock(&sdata->local->mtx);
1307}
1308
7a5158ef
JB		 1309static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1310 u16 capab, bool erp_valid, u8 erp)
5628221c 1311{
bda3933a 1312 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1313 u32 changed = 0;
7a5158ef
JB		 1314 bool use_protection;
1315 bool use_short_preamble;
1316 bool use_short_slot;
1317
1318 if (erp_valid) {
1319 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1320 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1321 } else {
1322 use_protection = false;
1323 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1324 }
1325
1326 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1327 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1328 use_short_slot = true;
5628221c 1329
471b3efd 1330 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1331 bss_conf->use_cts_prot = use_protection;
1332 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1333 }
7e9ed188 1334
d43c7b37 1335 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1336 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1337 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1338 }
d9430a32 1339
7a5158ef 1340 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1341 bss_conf->use_short_slot = use_short_slot;
1342 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1343 }
1344
1345 return changed;
1346}
1347
f698d856 1348static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1349 struct cfg80211_bss *cbss,
ae5eb026 1350 u32 bss_info_changed)
f0706e82 1351{
0c1ad2ca 1352 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1353 struct ieee80211_local *local = sdata->local;
68542962 1354 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1355
ae5eb026 1356 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1357 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1358 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1359
7ccc8bd7
FF		 1360 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1361 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1362
0c1ad2ca
JB		 1363 sdata->u.mgd.associated = cbss;
1364 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1365
17e4ec14
JM		 1366 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1367
b291ba11 1368 /* just to be sure */
925e64c3 1369 ieee80211_stop_poll(sdata);
b291ba11 1370
9ac19a90 1371 ieee80211_led_assoc(local, 1);
9306102e 1372
e5b900d2
JB		 1373 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1374 bss_conf->dtim_period = bss->dtim_period;
1375 else
1376 bss_conf->dtim_period = 0;
1377
68542962 1378 bss_conf->assoc = 1;
9cef8737 1379
a97c13c3 1380 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1381 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1382 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1383 bss_info_changed |= BSS_CHANGED_CQM;
1384
68542962
JO		 1385 /* Enable ARP filtering */
1386 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1387 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1388 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1389 }
1390
ae5eb026 1391 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1392
056508dc
JB		 1393 mutex_lock(&local->iflist_mtx);
1394 ieee80211_recalc_ps(local, -1);
1395 mutex_unlock(&local->iflist_mtx);
e0cb686f 1396
04ecd257 1397 ieee80211_recalc_smps(sdata);
ab095877
EP		 1398 ieee80211_recalc_ps_vif(sdata);
1399
8a5b33f5 1400 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1401 netif_carrier_on(sdata->dev);
f0706e82
JB		 1402}
1403
e69e95db 1404static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1405 u16 stype, u16 reason, bool tx,
1406 u8 *frame_buf)
aa458d17 1407{
46900298 1408 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1409 struct ieee80211_local *local = sdata->local;
1410 struct sta_info *sta;
3cc5240b 1411 u32 changed = 0;
aa458d17 1412
77fdaa12
JB		 1413 ASSERT_MGD_MTX(ifmgd);
1414
37ad3888
JB		 1415 if (WARN_ON_ONCE(tx && !frame_buf))
1416 return;
1417
b291ba11
JB		 1418 if (WARN_ON(!ifmgd->associated))
1419 return;
1420
79543d8e
DS		 1421 ieee80211_stop_poll(sdata);
1422
77fdaa12 1423 ifmgd->associated = NULL;
77fdaa12
JB		 1424
1425 /*
1426 * we need to commit the associated = NULL change because the
1427 * scan code uses that to determine whether this iface should
1428 * go to/wake up from powersave or not -- and could otherwise
1429 * wake the queues erroneously.
1430 */
1431 smp_mb();
1432
1433 /*
1434 * Thus, we can only afterwards stop the queues -- to account
1435 * for the case where another CPU is finishing a scan at this
1436 * time -- we don't want the scan code to enable queues.
1437 */
aa458d17 1438
8a5b33f5 1439 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1440 netif_carrier_off(sdata->dev);
1441
2a419056 1442 mutex_lock(&local->sta_mtx);
88a9e31c 1443 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1444 if (sta) {
c2c98fde 1445 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
7f161146 1446 ieee80211_sta_tear_down_BA_sessions(sta, false);
4cad6c7c 1447 }
2a419056 1448 mutex_unlock(&local->sta_mtx);
aa458d17 1449
88bc40e8
EP		 1450 /*
1451 * if we want to get out of ps before disassoc (why?) we have
1452 * to do it before sending disassoc, as otherwise the null-packet
1453 * won't be valid.
1454 */
1455 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1456 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1457 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1458 }
1459 local->ps_sdata = NULL;
1460
ab095877
EP		 1461 /* disable per-vif ps */
1462 ieee80211_recalc_ps_vif(sdata);
1463
f823981e
EP		 1464 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1465 if (tx)
1466 drv_flush(local, false);
1467
37ad3888
JB		 1468 /* deauthenticate/disassociate now */
1469 if (tx || frame_buf)
88a9e31c
EP		 1470 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1471 reason, tx, frame_buf);
37ad3888
JB		 1472
1473 /* flush out frame */
1474 if (tx)
1475 drv_flush(local, false);
1476
88a9e31c
EP		 1477 /* clear bssid only after building the needed mgmt frames */
1478 memset(ifmgd->bssid, 0, ETH_ALEN);
1479
37ad3888
JB		 1480 /* remove AP and TDLS peers */
1481 sta_info_flush(local, sdata);
1482
1483 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1484 changed |= ieee80211_reset_erp_info(sdata);
1485
f5e5bf25 1486 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1487 changed |= BSS_CHANGED_ASSOC;
1488 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1489
413ad50a 1490 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1491 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1492 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1493
1ea6f9c0 1494 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1495
520eb820
KV		 1496 del_timer_sync(&local->dynamic_ps_timer);
1497 cancel_work_sync(&local->dynamic_ps_enable_work);
1498
68542962
JO		 1499 /* Disable ARP filtering */
1500 if (sdata->vif.bss_conf.arp_filter_enabled) {
1501 sdata->vif.bss_conf.arp_filter_enabled = false;
1502 changed |= BSS_CHANGED_ARP_FILTER;
1503 }
1504
3abead59
JB		 1505 sdata->vif.bss_conf.qos = false;
1506 changed |= BSS_CHANGED_QOS;
1507
0aaffa9b
JB		 1508 /* The BSSID (not really interesting) and HT changed */
1509 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1510 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1511
55de908a 1512 ieee80211_vif_release_channel(sdata);
3cc5240b 1513
3abead59
JB		 1514 /* disassociated - set to defaults now */
1515 ieee80211_set_wmm_default(sdata, false);
1516
b9dcf712
JB		 1517 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1518 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1519 del_timer_sync(&sdata->u.mgd.timer);
1520 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1521
1522 sdata->u.mgd.timers_running = 0;
aa458d17 1523}
f0706e82 1524
3cf335d5
KV		 1525void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1526 struct ieee80211_hdr *hdr)
1527{
1528 /*
1529 * We can postpone the mgd.timer whenever receiving unicast frames
1530 * from AP because we know that the connection is working both ways
1531 * at that time. But multicast frames (and hence also beacons) must
1532 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1533 * data idle periods for sending the periodic probe request to the
1534 * AP we're connected to.
3cf335d5 1535 */
b291ba11
JB		 1536 if (is_multicast_ether_addr(hdr->addr1))
1537 return;
1538
be099e82 1539 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1540}
f0706e82 1541
4e5ff376
FF		 1542static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1543{
1544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1545 struct ieee80211_local *local = sdata->local;
4e5ff376 1546
133d40f9 1547 mutex_lock(&local->mtx);
4e5ff376 1548 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1549 IEEE80211_STA_CONNECTION_POLL))) {
1550 mutex_unlock(&local->mtx);
1551 return;
1552 }
4e5ff376 1553
925e64c3 1554 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1555
1556 mutex_lock(&local->iflist_mtx);
1557 ieee80211_recalc_ps(local, -1);
1558 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1559
1560 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1561 goto out;
4e5ff376
FF		 1562
1563 /*
1564 * We've received a probe response, but are not sure whether
1565 * we have or will be receiving any beacons or data, so let's
1566 * schedule the timers again, just in case.
1567 */
1568 ieee80211_sta_reset_beacon_monitor(sdata);
1569
1570 mod_timer(&ifmgd->conn_mon_timer,
1571 round_jiffies_up(jiffies +
1572 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1573out:
133d40f9 1574 mutex_unlock(&local->mtx);
4e5ff376
FF		 1575}
1576
1577void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1578 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1579{
75706d0e 1580 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1581 return;
1582
04ac3c0e
FF		 1583 if (ack)
1584 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1585
1586 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1587 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1588 if (ack)
1589 sdata->u.mgd.probe_send_count = 0;
1590 else
1591 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1592 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1593 }
1594}
1595
a43abf29
ML		 1596static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1597{
1598 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1599 const u8 *ssid;
f01a067d 1600 u8 *dst = ifmgd->associated->bssid;
180205bd 1601 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1602
1603 /*
1604 * Try sending broadcast probe requests for the last three
1605 * probe requests after the first ones failed since some
1606 * buggy APs only support broadcast probe requests.
1607 */
1608 if (ifmgd->probe_send_count >= unicast_limit)
1609 dst = NULL;
a43abf29 1610
4e5ff376
FF		 1611 /*
1612 * When the hardware reports an accurate Tx ACK status, it's
1613 * better to send a nullfunc frame instead of a probe request,
1614 * as it will kick us off the AP quickly if we aren't associated
1615 * anymore. The timeout will be reset if the frame is ACKed by
1616 * the AP.
1617 */
992e68bf
SD		 1618 ifmgd->probe_send_count++;
1619
04ac3c0e
FF		 1620 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1621 ifmgd->nullfunc_failed = false;
4e5ff376 1622 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1623 } else {
88c868c4
SG		 1624 int ssid_len;
1625
4e5ff376 1626 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1627 if (WARN_ON_ONCE(ssid == NULL))
1628 ssid_len = 0;
1629 else
1630 ssid_len = ssid[1];
1631
1632 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
fe94fe05 1633 0, (u32) -1, true, false,
55de908a 1634 ifmgd->associated->channel, false);
4e5ff376 1635 }
a43abf29 1636
180205bd 1637 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1638 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1639 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1640 drv_flush(sdata->local, false);
a43abf29
ML		 1641}
1642
b291ba11
JB		 1643static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1644 bool beacon)
04de8381 1645{
04de8381 1646 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1647 bool already = false;
34bfc411 1648
9607e6b6 1649 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1650 return;
1651
77fdaa12
JB		 1652 mutex_lock(&ifmgd->mtx);
1653
1654 if (!ifmgd->associated)
1655 goto out;
1656
133d40f9
SG		 1657 mutex_lock(&sdata->local->mtx);
1658
1659 if (sdata->local->tmp_channel || sdata->local->scanning) {
1660 mutex_unlock(&sdata->local->mtx);
1661 goto out;
1662 }
1663
e87cc472 1664 if (beacon)
bdcbd8e0
JB		 1665 mlme_dbg_ratelimited(sdata,
1666 "detected beacon loss from AP - sending probe request\n");
1667
6efb71b0
HS		 1668 ieee80211_cqm_rssi_notify(&sdata->vif,
1669 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1670
b291ba11
JB		 1671 /*
1672 * The driver/our work has already reported this event or the
1673 * connection monitoring has kicked in and we have already sent
1674 * a probe request. Or maybe the AP died and the driver keeps
1675 * reporting until we disassociate...
1676 *
1677 * In either case we have to ignore the current call to this
1678 * function (except for setting the correct probe reason bit)
1679 * because otherwise we would reset the timer every time and
1680 * never check whether we received a probe response!
1681 */
1682 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1683 IEEE80211_STA_CONNECTION_POLL))
1684 already = true;
1685
1686 if (beacon)
1687 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1688 else
1689 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1690
133d40f9
SG		 1691 mutex_unlock(&sdata->local->mtx);
1692
b291ba11
JB		 1693 if (already)
1694 goto out;
1695
4e751843
JB		 1696 mutex_lock(&sdata->local->iflist_mtx);
1697 ieee80211_recalc_ps(sdata->local, -1);
1698 mutex_unlock(&sdata->local->iflist_mtx);
1699
a43abf29
ML		 1700 ifmgd->probe_send_count = 0;
1701 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1702 out:
1703 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1704}
1705
a619a4c0
JO		 1706struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1707 struct ieee80211_vif *vif)
1708{
1709 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1711 struct cfg80211_bss *cbss;
a619a4c0
JO		 1712 struct sk_buff *skb;
1713 const u8 *ssid;
88c868c4 1714 int ssid_len;
a619a4c0
JO		 1715
1716 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1717 return NULL;
1718
1719 ASSERT_MGD_MTX(ifmgd);
1720
d9b3b28b
EP		 1721 if (ifmgd->associated)
1722 cbss = ifmgd->associated;
1723 else if (ifmgd->auth_data)
1724 cbss = ifmgd->auth_data->bss;
1725 else if (ifmgd->assoc_data)
1726 cbss = ifmgd->assoc_data->bss;
1727 else
a619a4c0
JO		 1728 return NULL;
1729
d9b3b28b 1730 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1731 if (WARN_ON_ONCE(ssid == NULL))
1732 ssid_len = 0;
1733 else
1734 ssid_len = ssid[1];
1735
d9b3b28b 1736 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1737 (u32) -1, cbss->channel,
6b77863b 1738 ssid + 2, ssid_len,
85a237fe 1739 NULL, 0, true);
a619a4c0
JO		 1740
1741 return skb;
1742}
1743EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1744
882a7c69
JB		 1745static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1746 bool transmit_frame)
1e4dcd01
JO		 1747{
1748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1749 struct ieee80211_local *local = sdata->local;
6ae16775 1750 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1751
1752 mutex_lock(&ifmgd->mtx);
1753 if (!ifmgd->associated) {
1754 mutex_unlock(&ifmgd->mtx);
1755 return;
1756 }
1757
37ad3888
JB		 1758 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1759 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
882a7c69
JB		 1760 transmit_frame, frame_buf);
1761 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1762 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1763
1e4dcd01
JO		 1764 /*
1765 * must be outside lock due to cfg80211,
1766 * but that's not a problem.
1767 */
6ae16775 1768 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 1769
1770 mutex_lock(&local->mtx);
1771 ieee80211_recalc_idle(local);
1772 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1773}
1774
cc74c0c7 1775static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1776{
1777 struct ieee80211_sub_if_data *sdata =
1778 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1779 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1780 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1781 struct sta_info *sta;
1782
1783 if (ifmgd->associated) {
30fa9047 1784 rcu_read_lock();
a85e1d55
PS		 1785 sta = sta_info_get(sdata, ifmgd->bssid);
1786 if (sta)
1787 sta->beacon_loss_count++;
30fa9047 1788 rcu_read_unlock();
a85e1d55 1789 }
b291ba11 1790
882a7c69
JB		 1791 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1792 sdata_info(sdata, "Connection to AP %pM lost\n",
1793 ifmgd->bssid);
1794 __ieee80211_disconnect(sdata, false);
1795 } else {
1e4dcd01 1796 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1797 }
1798}
1799
1800static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1801{
1802 struct ieee80211_sub_if_data *sdata =
1803 container_of(work, struct ieee80211_sub_if_data,
1804 u.mgd.csa_connection_drop_work);
1805
1806 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1807 IEEE80211_QUEUE_STOP_REASON_CSA);
1808 __ieee80211_disconnect(sdata, true);
b291ba11
JB		 1809}
1810
04de8381
KV		 1811void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1812{
1813 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1814 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1815
b5878a2d
JB		 1816 trace_api_beacon_loss(sdata);
1817
1e4dcd01
JO		 1818 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1819 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1820}
1821EXPORT_SYMBOL(ieee80211_beacon_loss);
1822
1e4dcd01
JO		 1823void ieee80211_connection_loss(struct ieee80211_vif *vif)
1824{
1825 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1826 struct ieee80211_hw *hw = &sdata->local->hw;
1827
b5878a2d
JB		 1828 trace_api_connection_loss(sdata);
1829
1e4dcd01
JO		 1830 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1831 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1832}
1833EXPORT_SYMBOL(ieee80211_connection_loss);
1834
1835
66e67e41
JB		 1836static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1837 bool assoc)
1838{
1839 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1840
1841 lockdep_assert_held(&sdata->u.mgd.mtx);
1842
66e67e41
JB		 1843 if (!assoc) {
1844 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1845
1846 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1847 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
55de908a 1848 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1849 }
1850
1851 cfg80211_put_bss(auth_data->bss);
1852 kfree(auth_data);
1853 sdata->u.mgd.auth_data = NULL;
1854}
1855
1856static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1857 struct ieee80211_mgmt *mgmt, size_t len)
1858{
1859 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1860 u8 *pos;
1861 struct ieee802_11_elems elems;
1862
1863 pos = mgmt->u.auth.variable;
1864 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1865 if (!elems.challenge)
1866 return;
1867 auth_data->expected_transaction = 4;
a1845fc7 1868 drv_mgd_prepare_tx(sdata->local, sdata);
700e8ea6 1869 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 1870 elems.challenge - 2, elems.challenge_len + 2,
1871 auth_data->bss->bssid, auth_data->bss->bssid,
1872 auth_data->key, auth_data->key_len,
1873 auth_data->key_idx);
1874}
1875
1876static enum rx_mgmt_action __must_check
1877ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1878 struct ieee80211_mgmt *mgmt, size_t len)
1879{
1880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1881 u8 bssid[ETH_ALEN];
1882 u16 auth_alg, auth_transaction, status_code;
1883 struct sta_info *sta;
1884
1885 lockdep_assert_held(&ifmgd->mtx);
1886
1887 if (len < 24 + 6)
1888 return RX_MGMT_NONE;
1889
1890 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1891 return RX_MGMT_NONE;
1892
1893 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1894
b203ca39 1895 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1896 return RX_MGMT_NONE;
1897
1898 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1899 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1900 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1901
1902 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 1903 auth_transaction != ifmgd->auth_data->expected_transaction) {
1904 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1905 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1906 auth_transaction,
1907 ifmgd->auth_data->expected_transaction);
66e67e41 1908 return RX_MGMT_NONE;
0f4126e8 1909 }
66e67e41
JB		 1910
1911 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1912 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1913 mgmt->sa, status_code);
dac211ec
EP		 1914 ieee80211_destroy_auth_data(sdata, false);
1915 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1916 }
1917
1918 switch (ifmgd->auth_data->algorithm) {
1919 case WLAN_AUTH_OPEN:
1920 case WLAN_AUTH_LEAP:
1921 case WLAN_AUTH_FT:
6b8ece3a 1922 case WLAN_AUTH_SAE:
66e67e41
JB		 1923 break;
1924 case WLAN_AUTH_SHARED_KEY:
1925 if (ifmgd->auth_data->expected_transaction != 4) {
1926 ieee80211_auth_challenge(sdata, mgmt, len);
1927 /* need another frame */
1928 return RX_MGMT_NONE;
1929 }
1930 break;
1931 default:
1932 WARN_ONCE(1, "invalid auth alg %d",
1933 ifmgd->auth_data->algorithm);
1934 return RX_MGMT_NONE;
1935 }
1936
bdcbd8e0 1937 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1938 ifmgd->auth_data->done = true;
1939 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1940 run_again(ifmgd, ifmgd->auth_data->timeout);
1941
6b8ece3a
JM		 1942 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
1943 ifmgd->auth_data->expected_transaction != 2) {
1944 /*
1945 * Report auth frame to user space for processing since another
1946 * round of Authentication frames is still needed.
1947 */
1948 return RX_MGMT_CFG80211_RX_AUTH;
1949 }
1950
66e67e41
JB		 1951 /* move station state to auth */
1952 mutex_lock(&sdata->local->sta_mtx);
1953 sta = sta_info_get(sdata, bssid);
1954 if (!sta) {
1955 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1956 goto out_err;
1957 }
1958 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1959 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1960 goto out_err;
1961 }
1962 mutex_unlock(&sdata->local->sta_mtx);
1963
1964 return RX_MGMT_CFG80211_RX_AUTH;
1965 out_err:
1966 mutex_unlock(&sdata->local->sta_mtx);
1967 /* ignore frame -- wait for timeout */
1968 return RX_MGMT_NONE;
1969}
1970
1971
77fdaa12
JB		 1972static enum rx_mgmt_action __must_check
1973ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1974 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1975{
46900298 1976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1977 const u8 *bssid = NULL;
f0706e82
JB		 1978 u16 reason_code;
1979
66e67e41
JB		 1980 lockdep_assert_held(&ifmgd->mtx);
1981
f4ea83dd 1982 if (len < 24 + 2)
77fdaa12 1983 return RX_MGMT_NONE;
f0706e82 1984
66e67e41 1985 if (!ifmgd->associated ||
b203ca39 1986 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1987 return RX_MGMT_NONE;
77fdaa12 1988
0c1ad2ca 1989 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1990
1991 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1992
bdcbd8e0
JB		 1993 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1994 bssid, reason_code);
77fdaa12 1995
37ad3888
JB		 1996 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1997
7da7cc1d 1998 mutex_lock(&sdata->local->mtx);
63f170e0 1999 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2000 mutex_unlock(&sdata->local->mtx);
f0706e82 2001
77fdaa12 2002 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2003}
2004
2005
77fdaa12
JB		 2006static enum rx_mgmt_action __must_check
2007ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2008 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2009{
46900298 2010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2011 u16 reason_code;
2012
66e67e41 2013 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2014
66e67e41 2015 if (len < 24 + 2)
77fdaa12
JB		 2016 return RX_MGMT_NONE;
2017
66e67e41 2018 if (!ifmgd->associated ||
b203ca39 2019 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2020 return RX_MGMT_NONE;
f0706e82
JB		 2021
2022 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2023
bdcbd8e0
JB		 2024 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2025 mgmt->sa, reason_code);
f0706e82 2026
37ad3888
JB		 2027 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2028
7da7cc1d 2029 mutex_lock(&sdata->local->mtx);
bc83b681 2030 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2031 mutex_unlock(&sdata->local->mtx);
37ad3888 2032
77fdaa12 2033 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2034}
2035
c74d084f
CL		 2036static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2037 u8 *supp_rates, unsigned int supp_rates_len,
2038 u32 *rates, u32 *basic_rates,
2039 bool *have_higher_than_11mbit,
2040 int *min_rate, int *min_rate_index)
2041{
2042 int i, j;
2043
2044 for (i = 0; i < supp_rates_len; i++) {
2045 int rate = (supp_rates[i] & 0x7f) * 5;
2046 bool is_basic = !!(supp_rates[i] & 0x80);
2047
2048 if (rate > 110)
2049 *have_higher_than_11mbit = true;
2050
2051 /*
2052 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2053 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2054 *
2055 * Note: Even through the membership selector and the basic
2056 * rate flag share the same bit, they are not exactly
2057 * the same.
2058 */
2059 if (!!(supp_rates[i] & 0x80) &&
2060 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2061 continue;
2062
2063 for (j = 0; j < sband->n_bitrates; j++) {
2064 if (sband->bitrates[j].bitrate == rate) {
2065 *rates |= BIT(j);
2066 if (is_basic)
2067 *basic_rates |= BIT(j);
2068 if (rate < *min_rate) {
2069 *min_rate = rate;
2070 *min_rate_index = j;
2071 }
2072 break;
2073 }
2074 }
2075 }
2076}
f0706e82 2077
66e67e41
JB		 2078static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2079 bool assoc)
2080{
2081 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2082
2083 lockdep_assert_held(&sdata->u.mgd.mtx);
2084
66e67e41
JB		 2085 if (!assoc) {
2086 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2087
2088 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2089 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
55de908a 2090 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2091 }
2092
2093 kfree(assoc_data);
2094 sdata->u.mgd.assoc_data = NULL;
2095}
2096
2097static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2098 struct cfg80211_bss *cbss,
af6b6374 2099 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2100{
46900298 2101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2102 struct ieee80211_local *local = sdata->local;
8318d78a 2103 struct ieee80211_supported_band *sband;
f0706e82 2104 struct sta_info *sta;
af6b6374 2105 u8 *pos;
af6b6374 2106 u16 capab_info, aid;
f0706e82 2107 struct ieee802_11_elems elems;
bda3933a 2108 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2109 u32 changed = 0;
c74d084f 2110 int err;
f0706e82 2111
af6b6374 2112 /* AssocResp and ReassocResp have identical structure */
f0706e82 2113
f0706e82 2114 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2115 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2116
1dd84aa2 2117 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2118 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2119 aid);
1dd84aa2
JB		 2120 aid &= ~(BIT(15) | BIT(14));
2121
05cb9108
JB		 2122 ifmgd->broken_ap = false;
2123
2124 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2125 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2126 aid);
05cb9108
JB		 2127 aid = 0;
2128 ifmgd->broken_ap = true;
2129 }
2130
af6b6374
JB		 2131 pos = mgmt->u.assoc_resp.variable;
2132 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2133
f0706e82 2134 if (!elems.supp_rates) {
bdcbd8e0 2135 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2136 return false;
f0706e82
JB		 2137 }
2138
46900298 2139 ifmgd->aid = aid;
f0706e82 2140
2a33bee2
GE		 2141 mutex_lock(&sdata->local->sta_mtx);
2142 /*
2143 * station info was already allocated and inserted before
2144 * the association and should be available to us
2145 */
7852e361 2146 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2147 if (WARN_ON(!sta)) {
2148 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2149 return false;
77fdaa12 2150 }
05e5e883 2151
55de908a 2152 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2153
ab1faead 2154 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2155 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2156 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2157
64f68e5d
JB		 2158 sta->supports_40mhz =
2159 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2160
818255ea
MP		 2161 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2162 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2163 elems.vht_cap_elem,
2164 &sta->sta.vht_cap);
2165
4b7679a5 2166 rate_control_rate_init(sta);
f0706e82 2167
46900298 2168 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2169 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2170
ddf4ac53 2171 if (elems.wmm_param)
c2c98fde 2172 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2173
c8987876
JB		 2174 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2175 if (!err)
2176 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2177 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2178 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2179 if (err) {
bdcbd8e0
JB		 2180 sdata_info(sdata,
2181 "failed to move station %pM to desired state\n",
2182 sta->sta.addr);
c8987876
JB		 2183 WARN_ON(__sta_info_destroy(sta));
2184 mutex_unlock(&sdata->local->sta_mtx);
2185 return false;
2186 }
2187
7852e361 2188 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2189
f2176d72
JO		 2190 /*
2191 * Always handle WMM once after association regardless
2192 * of the first value the AP uses. Setting -1 here has
2193 * that effect because the AP values is an unsigned
2194 * 4-bit value.
2195 */
2196 ifmgd->wmm_last_param_set = -1;
2197
ddf4ac53 2198 if (elems.wmm_param)
4ced3f74 2199 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2200 elems.wmm_param_len);
aa837e1d 2201 else
3abead59
JB		 2202 ieee80211_set_wmm_default(sdata, false);
2203 changed |= BSS_CHANGED_QOS;
f0706e82 2204
074d46d1 2205 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2206 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2207 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2208 cbss->bssid, false);
ae5eb026 2209
60f8b39c
JB		 2210 /* set AID and assoc capability,
2211 * ieee80211_set_associated() will tell the driver */
2212 bss_conf->aid = aid;
2213 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2214 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2215
d524215f
FF		 2216 /*
2217 * If we're using 4-addr mode, let the AP know that we're
2218 * doing so, so that it can create the STA VLAN on its side
2219 */
2220 if (ifmgd->use_4addr)
2221 ieee80211_send_4addr_nullfunc(local, sdata);
2222
15b7b062 2223 /*
b291ba11
JB		 2224 * Start timer to probe the connection to the AP now.
2225 * Also start the timer that will detect beacon loss.
15b7b062 2226 */
b291ba11 2227 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2228 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2229
af6b6374 2230 return true;
f0706e82
JB		 2231}
2232
66e67e41
JB		 2233static enum rx_mgmt_action __must_check
2234ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2235 struct ieee80211_mgmt *mgmt, size_t len,
2236 struct cfg80211_bss **bss)
2237{
2238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2239 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2240 u16 capab_info, status_code, aid;
2241 struct ieee802_11_elems elems;
2242 u8 *pos;
2243 bool reassoc;
2244
2245 lockdep_assert_held(&ifmgd->mtx);
2246
2247 if (!assoc_data)
2248 return RX_MGMT_NONE;
b203ca39 2249 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2250 return RX_MGMT_NONE;
2251
2252 /*
2253 * AssocResp and ReassocResp have identical structure, so process both
2254 * of them in this function.
2255 */
2256
2257 if (len < 24 + 6)
2258 return RX_MGMT_NONE;
2259
2260 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2261 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2262 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2263 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2264
bdcbd8e0
JB		 2265 sdata_info(sdata,
2266 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2267 reassoc ? "Rea" : "A", mgmt->sa,
2268 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2269
2270 pos = mgmt->u.assoc_resp.variable;
2271 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2272
2273 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2274 elems.timeout_int && elems.timeout_int_len == 5 &&
2275 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2276 u32 tu, ms;
2277 tu = get_unaligned_le32(elems.timeout_int + 1);
2278 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2279 sdata_info(sdata,
2280 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2281 mgmt->sa, tu, ms);
66e67e41
JB		 2282 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2283 if (ms > IEEE80211_ASSOC_TIMEOUT)
2284 run_again(ifmgd, assoc_data->timeout);
2285 return RX_MGMT_NONE;
2286 }
2287
2288 *bss = assoc_data->bss;
2289
2290 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2291 sdata_info(sdata, "%pM denied association (code=%d)\n",
2292 mgmt->sa, status_code);
66e67e41
JB		 2293 ieee80211_destroy_assoc_data(sdata, false);
2294 } else {
66e67e41
JB		 2295 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2296 /* oops -- internal error -- send timeout for now */
10a9109f 2297 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2298 cfg80211_put_bss(*bss);
2299 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2300 }
635d999f 2301 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2302
2303 /*
2304 * destroy assoc_data afterwards, as otherwise an idle
2305 * recalc after assoc_data is NULL but before associated
2306 * is set can cause the interface to go idle
2307 */
2308 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2309 }
2310
2311 return RX_MGMT_CFG80211_RX_ASSOC;
2312}
98c8fccf
JB		 2313static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2314 struct ieee80211_mgmt *mgmt,
2315 size_t len,
2316 struct ieee80211_rx_status *rx_status,
2317 struct ieee802_11_elems *elems,
2318 bool beacon)
2319{
2320 struct ieee80211_local *local = sdata->local;
2321 int freq;
c2b13452 2322 struct ieee80211_bss *bss;
98c8fccf 2323 struct ieee80211_channel *channel;
56007a02
JB		 2324 bool need_ps = false;
2325
66e67e41 2326 if (sdata->u.mgd.associated &&
b203ca39 2327 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2328 bss = (void *)sdata->u.mgd.associated->priv;
2329 /* not previously set so we may need to recalc */
2330 need_ps = !bss->dtim_period;
2331 }
98c8fccf
JB		 2332
2333 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2334 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2335 rx_status->band);
98c8fccf
JB		 2336 else
2337 freq = rx_status->freq;
2338
2339 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2340
2341 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2342 return;
2343
98c8fccf 2344 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2345 channel, beacon);
77fdaa12
JB		 2346 if (bss)
2347 ieee80211_rx_bss_put(local, bss);
2348
2349 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2350 return;
2351
56007a02
JB		 2352 if (need_ps) {
2353 mutex_lock(&local->iflist_mtx);
2354 ieee80211_recalc_ps(local, -1);
2355 mutex_unlock(&local->iflist_mtx);
2356 }
2357
5bc1420b
JB		 2358 if (elems->ch_switch_ie &&
2359 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2360 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2361 bss, rx_status->mactime);
f0706e82
JB		 2362}
2363
2364
f698d856 2365static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2366 struct sk_buff *skb)
f0706e82 2367{
af6b6374 2368 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2369 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2370 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2371 size_t baselen, len = skb->len;
ae6a44e3
EK		 2372 struct ieee802_11_elems elems;
2373
15b7b062
KV		 2374 ifmgd = &sdata->u.mgd;
2375
77fdaa12
JB		 2376 ASSERT_MGD_MTX(ifmgd);
2377
b203ca39 2378 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2379 return; /* ignore ProbeResp to foreign address */
2380
ae6a44e3
EK		 2381 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2382 if (baselen > len)
2383 return;
2384
2385 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2386 &elems);
2387
98c8fccf 2388 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2389
77fdaa12 2390 if (ifmgd->associated &&
b203ca39 2391 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2392 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2393
2394 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2395 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2396 /* got probe response, continue with auth */
bdcbd8e0 2397 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2398 ifmgd->auth_data->tries = 0;
2399 ifmgd->auth_data->timeout = jiffies;
2400 run_again(ifmgd, ifmgd->auth_data->timeout);
2401 }
f0706e82
JB		 2402}
2403
d91f36db
JB		 2404/*
2405 * This is the canonical list of information elements we care about,
2406 * the filter code also gives us all changes to the Microsoft OUI
2407 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2408 *
2409 * We implement beacon filtering in software since that means we can
2410 * avoid processing the frame here and in cfg80211, and userspace
2411 * will not be able to tell whether the hardware supports it or not.
2412 *
2413 * XXX: This list needs to be dynamic -- userspace needs to be able to
2414 * add items it requires. It also needs to be able to tell us to
2415 * look out for other vendor IEs.
2416 */
2417static const u64 care_about_ies =
1d4df3a5
JB		 2418 (1ULL << WLAN_EID_COUNTRY) |
2419 (1ULL << WLAN_EID_ERP_INFO) |
2420 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2421 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2422 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2423 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2424
f698d856 2425static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2426 struct ieee80211_mgmt *mgmt,
2427 size_t len,
2428 struct ieee80211_rx_status *rx_status)
2429{
d91f36db 2430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2431 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2432 size_t baselen;
2433 struct ieee802_11_elems elems;
f698d856 2434 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2435 struct ieee80211_chanctx_conf *chanctx_conf;
2436 struct ieee80211_channel *chan;
471b3efd 2437 u32 changed = 0;
f87ad637 2438 bool erp_valid;
7a5158ef 2439 u8 erp_value = 0;
d91f36db 2440 u32 ncrc;
77fdaa12
JB		 2441 u8 *bssid;
2442
66e67e41 2443 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2444
ae6a44e3
EK		 2445 /* Process beacon from the current BSS */
2446 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2447 if (baselen > len)
2448 return;
2449
55de908a
JB		 2450 rcu_read_lock();
2451 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2452 if (!chanctx_conf) {
2453 rcu_read_unlock();
f0706e82 2454 return;
55de908a
JB		 2455 }
2456
2457 if (rx_status->freq != chanctx_conf->channel->center_freq) {
2458 rcu_read_unlock();
2459 return;
2460 }
2461 chan = chanctx_conf->channel;
2462 rcu_read_unlock();
f0706e82 2463
66e67e41 2464 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2465 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2466 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2467 len - baselen, &elems);
77fdaa12 2468
66e67e41
JB		 2469 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2470 false);
2471 ifmgd->assoc_data->have_beacon = true;
2472 ifmgd->assoc_data->sent_assoc = false;
2473 /* continue assoc process */
2474 ifmgd->assoc_data->timeout = jiffies;
2475 run_again(ifmgd, ifmgd->assoc_data->timeout);
2476 return;
2477 }
77fdaa12 2478
66e67e41 2479 if (!ifmgd->associated ||
b203ca39 2480 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2481 return;
66e67e41 2482 bssid = ifmgd->associated->bssid;
f0706e82 2483
17e4ec14
JM		 2484 /* Track average RSSI from the Beacon frames of the current AP */
2485 ifmgd->last_beacon_signal = rx_status->signal;
2486 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2487 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2488 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2489 ifmgd->last_cqm_event_signal = 0;
391a200a 2490 ifmgd->count_beacon_signal = 1;
615f7b9b 2491 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2492 } else {
2493 ifmgd->ave_beacon_signal =
2494 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2495 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2496 ifmgd->ave_beacon_signal) / 16;
391a200a 2497 ifmgd->count_beacon_signal++;
17e4ec14 2498 }
615f7b9b
MV		 2499
2500 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2501 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2502 int sig = ifmgd->ave_beacon_signal;
2503 int last_sig = ifmgd->last_ave_beacon_signal;
2504
2505 /*
2506 * if signal crosses either of the boundaries, invoke callback
2507 * with appropriate parameters
2508 */
2509 if (sig > ifmgd->rssi_max_thold &&
2510 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2511 ifmgd->last_ave_beacon_signal = sig;
2512 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2513 } else if (sig < ifmgd->rssi_min_thold &&
2514 (last_sig >= ifmgd->rssi_max_thold ||
2515 last_sig == 0)) {
2516 ifmgd->last_ave_beacon_signal = sig;
2517 drv_rssi_callback(local, RSSI_EVENT_LOW);
2518 }
2519 }
2520
17e4ec14 2521 if (bss_conf->cqm_rssi_thold &&
391a200a 2522 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2523 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2524 int sig = ifmgd->ave_beacon_signal / 16;
2525 int last_event = ifmgd->last_cqm_event_signal;
2526 int thold = bss_conf->cqm_rssi_thold;
2527 int hyst = bss_conf->cqm_rssi_hyst;
2528 if (sig < thold &&
2529 (last_event == 0 || sig < last_event - hyst)) {
2530 ifmgd->last_cqm_event_signal = sig;
2531 ieee80211_cqm_rssi_notify(
2532 &sdata->vif,
2533 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2534 GFP_KERNEL);
2535 } else if (sig > thold &&
2536 (last_event == 0 || sig > last_event + hyst)) {
2537 ifmgd->last_cqm_event_signal = sig;
2538 ieee80211_cqm_rssi_notify(
2539 &sdata->vif,
2540 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2541 GFP_KERNEL);
2542 }
2543 }
2544
b291ba11 2545 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2546 mlme_dbg_ratelimited(sdata,
2547 "cancelling probereq poll due to a received beacon\n");
925e64c3 2548 mutex_lock(&local->mtx);
b291ba11 2549 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2550 ieee80211_run_deferred_scan(local);
2551 mutex_unlock(&local->mtx);
2552
4e751843
JB		 2553 mutex_lock(&local->iflist_mtx);
2554 ieee80211_recalc_ps(local, -1);
2555 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2556 }
2557
b291ba11
JB		 2558 /*
2559 * Push the beacon loss detection into the future since
2560 * we are processing a beacon from the AP just now.
2561 */
d3a910a8 2562 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2563
d91f36db
JB		 2564 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2565 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2566 len - baselen, &elems,
2567 care_about_ies, ncrc);
2568
25c9c875 2569 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2570 bool directed_tim = ieee80211_check_tim(elems.tim,
2571 elems.tim_len,
2572 ifmgd->aid);
1fb3606b 2573 if (directed_tim) {
572e0012 2574 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2575 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2576 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2577 ieee80211_hw_config(local,
2578 IEEE80211_CONF_CHANGE_PS);
2579 }
572e0012 2580 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2581 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2582 local->pspolling = true;
2583
2584 /*
2585 * Here is assumed that the driver will be
2586 * able to send ps-poll frame and receive a
2587 * response even though power save mode is
2588 * enabled, but some drivers might require
2589 * to disable power save here. This needs
2590 * to be investigated.
2591 */
2592 ieee80211_send_pspoll(local, sdata);
2593 }
a97b77b9
VN		 2594 }
2595 }
7a5158ef 2596
d8ec4433 2597 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2598 return;
2599 ifmgd->beacon_crc = ncrc;
d8ec4433 2600 ifmgd->beacon_crc_valid = true;
30196673 2601
7d25745d
JB		 2602 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2603 true);
2604
2605 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2606 elems.wmm_param_len))
2607 changed |= BSS_CHANGED_QOS;
2608
7a5158ef
JB		 2609 if (elems.erp_info && elems.erp_info_len >= 1) {
2610 erp_valid = true;
2611 erp_value = elems.erp_info[0];
2612 } else {
2613 erp_valid = false;
50c4afb9 2614 }
7a5158ef
JB		 2615 changed |= ieee80211_handle_bss_capability(sdata,
2616 le16_to_cpu(mgmt->u.beacon.capab_info),
2617 erp_valid, erp_value);
f0706e82 2618
d3c990fb 2619
074d46d1 2620 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
444e3803 2621 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2622 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2623 bssid, true);
d3c990fb 2624
04b7b2ff
JB		 2625 if (elems.country_elem && elems.pwr_constr_elem &&
2626 mgmt->u.probe_resp.capab_info &
2627 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2628 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2629 elems.country_elem,
2630 elems.country_elem_len,
2631 elems.pwr_constr_elem);
3f2355cb 2632
471b3efd 2633 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2634}
2635
1fa57d01
JB		 2636void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2637 struct sk_buff *skb)
f0706e82 2638{
77fdaa12 2639 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2640 struct ieee80211_rx_status *rx_status;
f0706e82 2641 struct ieee80211_mgmt *mgmt;
66e67e41 2642 struct cfg80211_bss *bss = NULL;
77fdaa12 2643 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2644 u16 fc;
2645
f0706e82
JB		 2646 rx_status = (struct ieee80211_rx_status *) skb->cb;
2647 mgmt = (struct ieee80211_mgmt *) skb->data;
2648 fc = le16_to_cpu(mgmt->frame_control);
2649
77fdaa12
JB		 2650 mutex_lock(&ifmgd->mtx);
2651
66e67e41
JB		 2652 switch (fc & IEEE80211_FCTL_STYPE) {
2653 case IEEE80211_STYPE_BEACON:
2654 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2655 break;
2656 case IEEE80211_STYPE_PROBE_RESP:
2657 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2658 break;
2659 case IEEE80211_STYPE_AUTH:
2660 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2661 break;
2662 case IEEE80211_STYPE_DEAUTH:
2663 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2664 break;
2665 case IEEE80211_STYPE_DISASSOC:
2666 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2667 break;
2668 case IEEE80211_STYPE_ASSOC_RESP:
2669 case IEEE80211_STYPE_REASSOC_RESP:
2670 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2671 break;
2672 case IEEE80211_STYPE_ACTION:
2673 switch (mgmt->u.action.category) {
2674 case WLAN_CATEGORY_SPECTRUM_MGMT:
2675 ieee80211_sta_process_chanswitch(sdata,
2676 &mgmt->u.action.u.chan_switch.sw_elem,
2677 (void *)ifmgd->associated->priv,
2678 rx_status->mactime);
77fdaa12 2679 break;
77fdaa12 2680 }
77fdaa12 2681 }
77fdaa12
JB		 2682 mutex_unlock(&ifmgd->mtx);
2683
66e67e41
JB		 2684 switch (rma) {
2685 case RX_MGMT_NONE:
2686 /* no action */
2687 break;
2688 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2689 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2690 break;
2691 case RX_MGMT_CFG80211_DISASSOC:
2692 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2693 break;
2694 case RX_MGMT_CFG80211_RX_AUTH:
2695 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2696 break;
2697 case RX_MGMT_CFG80211_RX_ASSOC:
2698 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2699 break;
2700 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2701 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2702 break;
2703 default:
2704 WARN(1, "unexpected: %d", rma);
b054b747 2705 }
f0706e82
JB		 2706}
2707
9c6bd790 2708static void ieee80211_sta_timer(unsigned long data)
f0706e82 2709{
60f8b39c
JB		 2710 struct ieee80211_sub_if_data *sdata =
2711 (struct ieee80211_sub_if_data *) data;
46900298 2712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2713 struct ieee80211_local *local = sdata->local;
f0706e82 2714
5bb644a0
JB		 2715 if (local->quiescing) {
2716 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2717 return;
2718 }
2719
64592c8f 2720 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2721}
2722
04ac3c0e 2723static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2724 u8 *bssid, u8 reason)
04ac3c0e
FF		 2725{
2726 struct ieee80211_local *local = sdata->local;
2727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2728 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2729
37ad3888
JB		 2730 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2731 false, frame_buf);
04ac3c0e 2732 mutex_unlock(&ifmgd->mtx);
37ad3888 2733
04ac3c0e
FF		 2734 /*
2735 * must be outside lock due to cfg80211,
2736 * but that's not a problem.
2737 */
6ae16775 2738 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 2739
2740 mutex_lock(&local->mtx);
2741 ieee80211_recalc_idle(local);
2742 mutex_unlock(&local->mtx);
2743
04ac3c0e
FF		 2744 mutex_lock(&ifmgd->mtx);
2745}
2746
66e67e41
JB		 2747static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2748{
2749 struct ieee80211_local *local = sdata->local;
2750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2751 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2752
2753 lockdep_assert_held(&ifmgd->mtx);
2754
2755 if (WARN_ON_ONCE(!auth_data))
2756 return -EINVAL;
2757
66e67e41
JB		 2758 auth_data->tries++;
2759
2760 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2761 sdata_info(sdata, "authentication with %pM timed out\n",
2762 auth_data->bss->bssid);
66e67e41
JB		 2763
2764 /*
2765 * Most likely AP is not in the range so remove the
2766 * bss struct for that AP.
2767 */
2768 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2769
2770 return -ETIMEDOUT;
2771 }
2772
a1845fc7
JB		 2773 drv_mgd_prepare_tx(local, sdata);
2774
66e67e41 2775 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 2776 u16 trans = 1;
2777 u16 status = 0;
2778
bdcbd8e0
JB		 2779 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2780 auth_data->bss->bssid, auth_data->tries,
2781 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2782
2783 auth_data->expected_transaction = 2;
6b8ece3a
JM		 2784
2785 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2786 trans = auth_data->sae_trans;
2787 status = auth_data->sae_status;
2788 auth_data->expected_transaction = trans;
2789 }
2790
2791 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2792 auth_data->data, auth_data->data_len,
66e67e41
JB		 2793 auth_data->bss->bssid,
2794 auth_data->bss->bssid, NULL, 0, 0);
2795 } else {
2796 const u8 *ssidie;
2797
bdcbd8e0
JB		 2798 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2799 auth_data->bss->bssid, auth_data->tries,
2800 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2801
2802 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2803 if (!ssidie)
2804 return -EINVAL;
2805 /*
2806 * Direct probe is sent to broadcast address as some APs
2807 * will not answer to direct packet in unassociated state.
2808 */
2809 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
fe94fe05 2810 NULL, 0, (u32) -1, true, false,
55de908a 2811 auth_data->bss->channel, false);
66e67e41
JB		 2812 }
2813
2814 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2815 run_again(ifmgd, auth_data->timeout);
2816
2817 return 0;
2818}
2819
2820static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2821{
2822 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2823 struct ieee80211_local *local = sdata->local;
2824
2825 lockdep_assert_held(&sdata->u.mgd.mtx);
2826
66e67e41
JB		 2827 assoc_data->tries++;
2828 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2829 sdata_info(sdata, "association with %pM timed out\n",
2830 assoc_data->bss->bssid);
66e67e41
JB		 2831
2832 /*
2833 * Most likely AP is not in the range so remove the
2834 * bss struct for that AP.
2835 */
2836 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2837
2838 return -ETIMEDOUT;
2839 }
2840
bdcbd8e0
JB		 2841 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2842 assoc_data->bss->bssid, assoc_data->tries,
2843 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2844 ieee80211_send_assoc(sdata);
2845
2846 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2847 run_again(&sdata->u.mgd, assoc_data->timeout);
2848
2849 return 0;
2850}
2851
1fa57d01 2852void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2853{
9c6bd790 2854 struct ieee80211_local *local = sdata->local;
1fa57d01 2855 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2856
77fdaa12
JB		 2857 mutex_lock(&ifmgd->mtx);
2858
66e67e41
JB		 2859 if (ifmgd->auth_data &&
2860 time_after(jiffies, ifmgd->auth_data->timeout)) {
2861 if (ifmgd->auth_data->done) {
2862 /*
2863 * ok ... we waited for assoc but userspace didn't,
2864 * so let's just kill the auth data
2865 */
2866 ieee80211_destroy_auth_data(sdata, false);
2867 } else if (ieee80211_probe_auth(sdata)) {
2868 u8 bssid[ETH_ALEN];
2869
2870 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2871
2872 ieee80211_destroy_auth_data(sdata, false);
2873
2874 mutex_unlock(&ifmgd->mtx);
2875 cfg80211_send_auth_timeout(sdata->dev, bssid);
2876 mutex_lock(&ifmgd->mtx);
2877 }
2878 } else if (ifmgd->auth_data)
2879 run_again(ifmgd, ifmgd->auth_data->timeout);
2880
2881 if (ifmgd->assoc_data &&
2882 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2883 if (!ifmgd->assoc_data->have_beacon ||
2884 ieee80211_do_assoc(sdata)) {
2885 u8 bssid[ETH_ALEN];
2886
2887 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2888
2889 ieee80211_destroy_assoc_data(sdata, false);
2890
2891 mutex_unlock(&ifmgd->mtx);
2892 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2893 mutex_lock(&ifmgd->mtx);
2894 }
2895 } else if (ifmgd->assoc_data)
2896 run_again(ifmgd, ifmgd->assoc_data->timeout);
2897
b291ba11
JB		 2898 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2899 IEEE80211_STA_CONNECTION_POLL) &&
2900 ifmgd->associated) {
a43abf29 2901 u8 bssid[ETH_ALEN];
72a8a3ed 2902 int max_tries;
a43abf29 2903
0c1ad2ca 2904 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2905
72a8a3ed 2906 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2907 max_tries = max_nullfunc_tries;
72a8a3ed 2908 else
180205bd 2909 max_tries = max_probe_tries;
72a8a3ed 2910
4e5ff376
FF		 2911 /* ACK received for nullfunc probing frame */
2912 if (!ifmgd->probe_send_count)
2913 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2914 else if (ifmgd->nullfunc_failed) {
2915 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2916 mlme_dbg(sdata,
2917 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2918 bssid, ifmgd->probe_send_count,
2919 max_tries);
04ac3c0e
FF		 2920 ieee80211_mgd_probe_ap_send(sdata);
2921 } else {
bdcbd8e0
JB		 2922 mlme_dbg(sdata,
2923 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2924 bssid);
95acac61
JB		 2925 ieee80211_sta_connection_lost(sdata, bssid,
2926 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2927 }
2928 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2929 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2930 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2931 mlme_dbg(sdata,
2932 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2933 bssid, probe_wait_ms);
95acac61
JB		 2934 ieee80211_sta_connection_lost(sdata, bssid,
2935 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2936 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2937 mlme_dbg(sdata,
2938 "No probe response from AP %pM after %dms, try %d/%i\n",
2939 bssid, probe_wait_ms,
2940 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2941 ieee80211_mgd_probe_ap_send(sdata);
2942 } else {
b291ba11
JB		 2943 /*
2944 * We actually lost the connection ... or did we?
2945 * Let's make sure!
2946 */
b38afa87
BG		 2947 wiphy_debug(local->hw.wiphy,
2948 "%s: No probe response from AP %pM"
2949 " after %dms, disconnecting.\n",
2950 sdata->name,
180205bd 2951 bssid, probe_wait_ms);
04ac3c0e 2952
95acac61
JB		 2953 ieee80211_sta_connection_lost(sdata, bssid,
2954 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2955 }
2956 }
2957
77fdaa12 2958 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2959
2960 mutex_lock(&local->mtx);
2961 ieee80211_recalc_idle(local);
2962 mutex_unlock(&local->mtx);
f0706e82
JB		 2963}
2964
b291ba11
JB		 2965static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2966{
2967 struct ieee80211_sub_if_data *sdata =
2968 (struct ieee80211_sub_if_data *) data;
2969 struct ieee80211_local *local = sdata->local;
2970
2971 if (local->quiescing)
2972 return;
2973
1e4dcd01
JO		 2974 ieee80211_queue_work(&sdata->local->hw,
2975 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2976}
2977
2978static void ieee80211_sta_conn_mon_timer(unsigned long data)
2979{
2980 struct ieee80211_sub_if_data *sdata =
2981 (struct ieee80211_sub_if_data *) data;
2982 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2983 struct ieee80211_local *local = sdata->local;
2984
2985 if (local->quiescing)
2986 return;
2987
42935eca 2988 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2989}
2990
2991static void ieee80211_sta_monitor_work(struct work_struct *work)
2992{
2993 struct ieee80211_sub_if_data *sdata =
2994 container_of(work, struct ieee80211_sub_if_data,
2995 u.mgd.monitor_work);
2996
2997 ieee80211_mgd_probe_ap(sdata, false);
2998}
2999
9c6bd790
JB		 3000static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3001{
494f1fe5
EP		 3002 u32 flags;
3003
ad935687 3004 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3005 __ieee80211_stop_poll(sdata);
ad935687 3006
b291ba11 3007 /* let's probe the connection once */
494f1fe5
EP		 3008 flags = sdata->local->hw.flags;
3009 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3010 ieee80211_queue_work(&sdata->local->hw,
3011 &sdata->u.mgd.monitor_work);
b291ba11 3012 /* and do all the other regular work too */
64592c8f 3013 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3014 }
9c6bd790 3015}
f0706e82 3016
5bb644a0
JB		 3017#ifdef CONFIG_PM
3018void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3019{
3020 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3021
3022 /*
3023 * we need to use atomic bitops for the running bits
3024 * only because both timers might fire at the same
3025 * time -- the code here is properly synchronised.
3026 */
3027
d1f5b7a3
JB		 3028 cancel_work_sync(&ifmgd->request_smps_work);
3029
0ecfe806 3030 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3031 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3032 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3033 if (del_timer_sync(&ifmgd->timer))
3034 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3035
3036 cancel_work_sync(&ifmgd->chswitch_work);
3037 if (del_timer_sync(&ifmgd->chswitch_timer))
3038 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3039
b291ba11
JB		 3040 /* these will just be re-established on connection */
3041 del_timer_sync(&ifmgd->conn_mon_timer);
3042 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3043}
3044
3045void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3046{
3047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3048
676b58c2
RM		 3049 if (!ifmgd->associated)
3050 return;
3051
95acac61
JB		 3052 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3053 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3054 mutex_lock(&ifmgd->mtx);
3055 if (ifmgd->associated) {
bdcbd8e0
JB		 3056 mlme_dbg(sdata,
3057 "driver requested disconnect after resume\n");
95acac61
JB		 3058 ieee80211_sta_connection_lost(sdata,
3059 ifmgd->associated->bssid,
3060 WLAN_REASON_UNSPECIFIED);
3061 mutex_unlock(&ifmgd->mtx);
3062 return;
3063 }
3064 mutex_unlock(&ifmgd->mtx);
3065 }
3066
5bb644a0
JB		 3067 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3068 add_timer(&ifmgd->timer);
3069 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3070 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3071 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3072
3073 mutex_lock(&sdata->local->mtx);
46090979 3074 ieee80211_restart_sta_timer(sdata);
925e64c3 3075 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3076}
3077#endif
3078
9c6bd790
JB		 3079/* interface setup */
3080void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3081{
46900298 3082 struct ieee80211_if_managed *ifmgd;
988c0f72 3083
46900298 3084 ifmgd = &sdata->u.mgd;
b291ba11 3085 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3086 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3087 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3088 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3089 INIT_WORK(&ifmgd->csa_connection_drop_work,
3090 ieee80211_csa_connection_drop_work);
d1f5b7a3 3091 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3092 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3093 (unsigned long) sdata);
b291ba11
JB		 3094 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3095 (unsigned long) sdata);
3096 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3097 (unsigned long) sdata);
46900298 3098 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3099 (unsigned long) sdata);
9c6bd790 3100
ab1faead 3101 ifmgd->flags = 0;
1478acb3 3102 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3103 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3104 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3105
77fdaa12 3106 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3107
3108 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3109 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3110 else
3111 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3112}
3113
77fdaa12
JB		 3114/* scan finished notification */
3115void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3116{
31ee67a1 3117 struct ieee80211_sub_if_data *sdata;
60f8b39c 3118
77fdaa12
JB		 3119 /* Restart STA timers */
3120 rcu_read_lock();
3121 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3122 ieee80211_restart_sta_timer(sdata);
3123 rcu_read_unlock();
3124}
60f8b39c 3125
77fdaa12
JB		 3126int ieee80211_max_network_latency(struct notifier_block *nb,
3127 unsigned long data, void *dummy)
3128{
3129 s32 latency_usec = (s32) data;
3130 struct ieee80211_local *local =
3131 container_of(nb, struct ieee80211_local,
3132 network_latency_notifier);
1fa6f4af 3133
77fdaa12
JB		 3134 mutex_lock(&local->iflist_mtx);
3135 ieee80211_recalc_ps(local, latency_usec);
3136 mutex_unlock(&local->iflist_mtx);
dfe67012 3137
77fdaa12 3138 return 0;
9c6bd790
JB		 3139}
3140
b17166a7
JB		 3141static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3142 struct cfg80211_bss *cbss)
a1cf775d
JB		 3143{
3144 struct ieee80211_local *local = sdata->local;
3145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39
JB		 3146 int ht_cfreq;
3147 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3148 const u8 *ht_oper_ie;
3149 const struct ieee80211_ht_operation *ht_oper = NULL;
3150 struct ieee80211_supported_band *sband;
a1cf775d 3151
24398e39
JB		 3152 sband = local->hw.wiphy->bands[cbss->channel->band];
3153
3154 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3155
3156 if (sband->ht_cap.ht_supported) {
3157 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3158 cbss->information_elements,
3159 cbss->len_information_elements);
3160 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3161 ht_oper = (void *)(ht_oper_ie + 2);
3162 }
3163
3164 if (ht_oper) {
3165 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3166 cbss->channel->band);
3167 /* check that channel matches the right operating channel */
3168 if (cbss->channel->center_freq != ht_cfreq) {
3169 /*
3170 * It's possible that some APs are confused here;
3171 * Netgear WNDR3700 sometimes reports 4 higher than
3172 * the actual channel in association responses, but
3173 * since we look at probe response/beacon data here
3174 * it should be OK.
3175 */
bdcbd8e0
JB		 3176 sdata_info(sdata,
3177 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3178 cbss->channel->center_freq,
3179 ht_cfreq, ht_oper->primary_chan,
3180 cbss->channel->band);
24398e39 3181 ht_oper = NULL;
3a40414f
JB		 3182 } else {
3183 channel_type = NL80211_CHAN_HT20;
24398e39
JB		 3184 }
3185 }
3186
3a40414f
JB		 3187 if (ht_oper && sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3188 /*
3189 * cfg80211 already verified that the channel itself can
3190 * be used, but it didn't check that we can do the right
3191 * HT type, so do that here as well. If HT40 isn't allowed
3192 * on this channel, disable 40 MHz operation.
3193 */
04ecd257
JB		 3194 const u8 *ht_cap_ie;
3195 const struct ieee80211_ht_cap *ht_cap;
3196 u8 chains = 1;
3197
24398e39
JB		 3198 channel_type = NL80211_CHAN_HT20;
3199
3a40414f
JB		 3200 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3201 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3202 if (cbss->channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
3203 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3204 else
24398e39 3205 channel_type = NL80211_CHAN_HT40PLUS;
3a40414f
JB		 3206 break;
3207 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3208 if (cbss->channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
3209 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3210 else
24398e39 3211 channel_type = NL80211_CHAN_HT40MINUS;
3a40414f 3212 break;
24398e39 3213 }
04ecd257
JB		 3214
3215 ht_cap_ie = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY,
3216 cbss->information_elements,
3217 cbss->len_information_elements);
3218 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3219 ht_cap = (void *)(ht_cap_ie + 2);
3220 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3221 }
3222 sdata->needed_rx_chains = min(chains, local->rx_chains);
3223 } else {
3224 sdata->needed_rx_chains = 1;
24398e39
JB		 3225 }
3226
04ecd257
JB		 3227 /* will change later if needed */
3228 sdata->smps_mode = IEEE80211_SMPS_OFF;
3229
55de908a
JB		 3230 ieee80211_vif_release_channel(sdata);
3231 return ieee80211_vif_use_channel(sdata, cbss->channel, channel_type,
3232 IEEE80211_CHANCTX_SHARED);
b17166a7
JB		 3233}
3234
3235static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3236 struct cfg80211_bss *cbss, bool assoc)
3237{
3238 struct ieee80211_local *local = sdata->local;
3239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3240 struct ieee80211_bss *bss = (void *)cbss->priv;
3241 struct sta_info *new_sta = NULL;
3242 bool have_sta = false;
3243 int err;
3244
3245 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3246 return -EINVAL;
3247
3248 if (assoc) {
3249 rcu_read_lock();
3250 have_sta = sta_info_get(sdata, cbss->bssid);
3251 rcu_read_unlock();
3252 }
3253
3254 if (!have_sta) {
3255 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3256 if (!new_sta)
3257 return -ENOMEM;
3258 }
3259
3260 mutex_lock(&local->mtx);
3261 ieee80211_recalc_idle(sdata->local);
3262 mutex_unlock(&local->mtx);
3263
13e0c8e3 3264 if (new_sta) {
5d6a1b06
JB		 3265 u32 rates = 0, basic_rates = 0;
3266 bool have_higher_than_11mbit;
3267 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3268 struct ieee80211_supported_band *sband;
3269
3270 sband = local->hw.wiphy->bands[cbss->channel->band];
3271
3272 err = ieee80211_prep_channel(sdata, cbss);
3273 if (err) {
3274 sta_info_free(local, new_sta);
3275 return err;
3276 }
5d6a1b06 3277
5d6a1b06
JB		 3278 ieee80211_get_rates(sband, bss->supp_rates,
3279 bss->supp_rates_len,
3280 &rates, &basic_rates,
3281 &have_higher_than_11mbit,
3282 &min_rate, &min_rate_index);
3283
3284 /*
3285 * This used to be a workaround for basic rates missing
3286 * in the association response frame. Now that we no
3287 * longer use the basic rates from there, it probably
3288 * doesn't happen any more, but keep the workaround so
3289 * in case some *other* APs are buggy in different ways
3290 * we can connect -- with a warning.
3291 */
3292 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3293 sdata_info(sdata,
3294 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3295 basic_rates = BIT(min_rate_index);
3296 }
3297
13e0c8e3 3298 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3299 sdata->vif.bss_conf.basic_rates = basic_rates;
3300
3301 /* cf. IEEE 802.11 9.2.12 */
55de908a 3302 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3303 have_higher_than_11mbit)
3304 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3305 else
3306 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3307
3308 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3309
8c358bcd
JB		 3310 /* set timing information */
3311 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3312 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3313 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3314
3315 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3316 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3317 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3318 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3319
3320 if (assoc)
13e0c8e3 3321 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3322
13e0c8e3
JB		 3323 err = sta_info_insert(new_sta);
3324 new_sta = NULL;
a1cf775d 3325 if (err) {
bdcbd8e0
JB		 3326 sdata_info(sdata,
3327 "failed to insert STA entry for the AP (error %d)\n",
3328 err);
a1cf775d
JB		 3329 return err;
3330 }
3331 } else
b203ca39 3332 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3333
3334 return 0;
3335}
3336
77fdaa12
JB		 3337/* config hooks */
3338int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3339 struct cfg80211_auth_request *req)
9c6bd790 3340{
66e67e41
JB		 3341 struct ieee80211_local *local = sdata->local;
3342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3343 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3344 u16 auth_alg;
66e67e41
JB		 3345 int err;
3346
3347 /* prepare auth data structure */
9c6bd790 3348
77fdaa12
JB		 3349 switch (req->auth_type) {
3350 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3351 auth_alg = WLAN_AUTH_OPEN;
3352 break;
3353 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3354 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3355 return -EOPNOTSUPP;
77fdaa12
JB		 3356 auth_alg = WLAN_AUTH_SHARED_KEY;
3357 break;
3358 case NL80211_AUTHTYPE_FT:
3359 auth_alg = WLAN_AUTH_FT;
3360 break;
3361 case NL80211_AUTHTYPE_NETWORK_EAP:
3362 auth_alg = WLAN_AUTH_LEAP;
3363 break;
6b8ece3a
JM		 3364 case NL80211_AUTHTYPE_SAE:
3365 auth_alg = WLAN_AUTH_SAE;
3366 break;
77fdaa12
JB		 3367 default:
3368 return -EOPNOTSUPP;
60f8b39c 3369 }
77fdaa12 3370
6b8ece3a
JM		 3371 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3372 req->ie_len, GFP_KERNEL);
66e67e41 3373 if (!auth_data)
9c6bd790 3374 return -ENOMEM;
77fdaa12 3375
66e67e41 3376 auth_data->bss = req->bss;
77fdaa12 3377
6b8ece3a
JM		 3378 if (req->sae_data_len >= 4) {
3379 __le16 *pos = (__le16 *) req->sae_data;
3380 auth_data->sae_trans = le16_to_cpu(pos[0]);
3381 auth_data->sae_status = le16_to_cpu(pos[1]);
3382 memcpy(auth_data->data, req->sae_data + 4,
3383 req->sae_data_len - 4);
3384 auth_data->data_len += req->sae_data_len - 4;
3385 }
3386
77fdaa12 3387 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3388 memcpy(&auth_data->data[auth_data->data_len],
3389 req->ie, req->ie_len);
3390 auth_data->data_len += req->ie_len;
9c6bd790 3391 }
77fdaa12 3392
fffd0934 3393 if (req->key && req->key_len) {
66e67e41
JB		 3394 auth_data->key_len = req->key_len;
3395 auth_data->key_idx = req->key_idx;
3396 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3397 }
3398
66e67e41 3399 auth_data->algorithm = auth_alg;
60f8b39c 3400
66e67e41 3401 /* try to authenticate/probe */
2a33bee2 3402
66e67e41 3403 mutex_lock(&ifmgd->mtx);
2a33bee2 3404
66e67e41
JB		 3405 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3406 ifmgd->assoc_data) {
3407 err = -EBUSY;
3408 goto err_free;
2a33bee2
GE		 3409 }
3410
66e67e41
JB		 3411 if (ifmgd->auth_data)
3412 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3413
66e67e41
JB		 3414 /* prep auth_data so we don't go into idle on disassoc */
3415 ifmgd->auth_data = auth_data;
af6b6374 3416
66e67e41 3417 if (ifmgd->associated)
37ad3888 3418 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3419
bdcbd8e0 3420 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3421
a1cf775d
JB		 3422 err = ieee80211_prep_connection(sdata, req->bss, false);
3423 if (err)
66e67e41 3424 goto err_clear;
af6b6374 3425
66e67e41
JB		 3426 err = ieee80211_probe_auth(sdata);
3427 if (err) {
66e67e41
JB		 3428 sta_info_destroy_addr(sdata, req->bss->bssid);
3429 goto err_clear;
3430 }
3431
3432 /* hold our own reference */
3433 cfg80211_ref_bss(auth_data->bss);
3434 err = 0;
3435 goto out_unlock;
3436
3437 err_clear:
3d2abdfd
EP		 3438 memset(ifmgd->bssid, 0, ETH_ALEN);
3439 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3440 ifmgd->auth_data = NULL;
3441 err_free:
3442 kfree(auth_data);
3443 out_unlock:
3444 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3445
66e67e41 3446 return err;
af6b6374
JB		 3447}
3448
77fdaa12
JB		 3449int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3450 struct cfg80211_assoc_request *req)
f0706e82 3451{
66e67e41 3452 struct ieee80211_local *local = sdata->local;
77fdaa12 3453 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3454 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3455 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3456 struct ieee80211_supported_band *sband;
9dde6423 3457 const u8 *ssidie, *ht_ie;
2a33bee2 3458 int i, err;
f0706e82 3459
66e67e41
JB		 3460 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3461 if (!ssidie)
3462 return -EINVAL;
3463
3464 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3465 if (!assoc_data)
3466 return -ENOMEM;
3467
77fdaa12 3468 mutex_lock(&ifmgd->mtx);
9c87ba67 3469
66e67e41 3470 if (ifmgd->associated)
37ad3888 3471 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3472
3473 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3474 err = -EBUSY;
3475 goto err_free;
af6b6374 3476 }
77fdaa12 3477
66e67e41
JB		 3478 if (ifmgd->assoc_data) {
3479 err = -EBUSY;
3480 goto err_free;
3481 }
77fdaa12 3482
66e67e41
JB		 3483 if (ifmgd->auth_data) {
3484 bool match;
3485
3486 /* keep sta info, bssid if matching */
b203ca39 3487 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3488 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3489 }
3490
66e67e41 3491 /* prepare assoc data */
19c3b830
JB		 3492
3493 /*
3494 * keep only the 40 MHz disable bit set as it might have
3495 * been set during authentication already, all other bits
3496 * should be reset for a new connection
3497 */
3498 ifmgd->flags &= IEEE80211_STA_DISABLE_40MHZ;
77fdaa12 3499
d8ec4433
JO		 3500 ifmgd->beacon_crc_valid = false;
3501
de5036aa
JB		 3502 /*
3503 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3504 * We still associate in non-HT mode (11a/b/g) if any one of these
3505 * ciphers is configured as pairwise.
3506 * We can set this to true for non-11n hardware, that'll be checked
3507 * separately along with the peer capabilities.
3508 */
1c4cb928 3509 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3510 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3511 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3512 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3513 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba 3514 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3515 netdev_info(sdata->dev,
d545daba 3516 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3517 }
3518 }
77fdaa12 3519
d545daba 3520 if (req->flags & ASSOC_REQ_DISABLE_HT) {
ef96a842 3521 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba
MP		 3522 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3523 }
ef96a842 3524
4e74bfdb
JB		 3525 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3526 sband = local->hw.wiphy->bands[req->bss->channel->band];
3527 if (!sband->ht_cap.ht_supported ||
1c4cb928 3528 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3529 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1b49de26
JB		 3530 if (!bss->wmm_used)
3531 netdev_info(sdata->dev,
3532 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3533 }
4e74bfdb 3534
d545daba
MP		 3535 /* disable VHT if we don't support it or the AP doesn't use WMM */
3536 if (!sband->vht_cap.vht_supported ||
3537 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3538 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3539 if (!bss->wmm_used)
3540 netdev_info(sdata->dev,
3541 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3542 }
3543
ef96a842
BG		 3544 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3545 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3546 sizeof(ifmgd->ht_capa_mask));
3547
77fdaa12 3548 if (req->ie && req->ie_len) {
66e67e41
JB		 3549 memcpy(assoc_data->ie, req->ie, req->ie_len);
3550 assoc_data->ie_len = req->ie_len;
3551 }
f679f65d 3552
66e67e41 3553 assoc_data->bss = req->bss;
f679f65d 3554
af6b6374
JB		 3555 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3556 if (ifmgd->powersave)
04ecd257 3557 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3558 else
04ecd257 3559 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3560 } else
04ecd257 3561 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3562
66e67e41 3563 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3564 assoc_data->wmm = bss->wmm_used &&
3565 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3566 assoc_data->supp_rates = bss->supp_rates;
3567 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3568
3569 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3570 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3571 assoc_data->ap_ht_param =
3572 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3573 else
3574 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3575
ab13315a
KV		 3576 if (bss->wmm_used && bss->uapsd_supported &&
3577 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3578 assoc_data->uapsd = true;
ab13315a
KV		 3579 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3580 } else {
76f0303d 3581 assoc_data->uapsd = false;
ab13315a
KV		 3582 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3583 }
3584
66e67e41
JB		 3585 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3586 assoc_data->ssid_len = ssidie[1];
63f170e0 3587
77fdaa12 3588 if (req->prev_bssid)
66e67e41 3589 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3590
3591 if (req->use_mfp) {
3592 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3593 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3594 } else {
3595 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3596 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3597 }
3598
3599 if (req->crypto.control_port)
3600 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3601 else
3602 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3603
a621fa4d
JB		 3604 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3605 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3606
66e67e41
JB		 3607 /* kick off associate process */
3608
3609 ifmgd->assoc_data = assoc_data;
3610
a1cf775d
JB		 3611 err = ieee80211_prep_connection(sdata, req->bss, true);
3612 if (err)
3613 goto err_clear;
66e67e41
JB		 3614
3615 if (!bss->dtim_period &&
3616 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3617 /*
3618 * Wait up to one beacon interval ...
3619 * should this be more if we miss one?
3620 */
bdcbd8e0
JB		 3621 sdata_info(sdata, "waiting for beacon from %pM\n",
3622 ifmgd->bssid);
3f9768a5 3623 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3624 } else {
3625 assoc_data->have_beacon = true;
3626 assoc_data->sent_assoc = false;
3627 assoc_data->timeout = jiffies;
3628 }
3629 run_again(ifmgd, assoc_data->timeout);
3630
fcff4f10
PS		 3631 if (bss->corrupt_data) {
3632 char *corrupt_type = "data";
3633 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3634 if (bss->corrupt_data &
3635 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3636 corrupt_type = "beacon and probe response";
3637 else
3638 corrupt_type = "beacon";
3639 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3640 corrupt_type = "probe response";
bdcbd8e0
JB		 3641 sdata_info(sdata, "associating with AP with corrupt %s\n",
3642 corrupt_type);
fcff4f10
PS		 3643 }
3644
66e67e41
JB		 3645 err = 0;
3646 goto out;
3647 err_clear:
3d2abdfd
EP		 3648 memset(ifmgd->bssid, 0, ETH_ALEN);
3649 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3650 ifmgd->assoc_data = NULL;
3651 err_free:
3652 kfree(assoc_data);
3653 out:
3654 mutex_unlock(&ifmgd->mtx);
3655
3656 return err;
f0706e82
JB		 3657}
3658
77fdaa12 3659int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3660 struct cfg80211_deauth_request *req)
f0706e82 3661{
46900298 3662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3663 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 3664 bool tx = !req->local_state_change;
86552017 3665 bool sent_frame = false;
f0706e82 3666
77fdaa12
JB		 3667 mutex_lock(&ifmgd->mtx);
3668
bdcbd8e0
JB		 3669 sdata_info(sdata,
3670 "deauthenticating from %pM by local choice (reason=%d)\n",
3671 req->bssid, req->reason_code);
0ff71613 3672
86552017 3673 if (ifmgd->auth_data) {
8c7d857c 3674 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 3675 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3676 IEEE80211_STYPE_DEAUTH,
6863255b 3677 req->reason_code, tx,
37ad3888 3678 frame_buf);
86552017
JB		 3679 ieee80211_destroy_auth_data(sdata, false);
3680 mutex_unlock(&ifmgd->mtx);
3681
3682 sent_frame = tx;
3683 goto out;
8c7d857c
EG		 3684 }
3685
86552017
JB		 3686 if (ifmgd->associated &&
3687 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
3688 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3689 req->reason_code, tx, frame_buf);
3690 sent_frame = tx;
3691 }
37ad3888
JB		 3692 mutex_unlock(&ifmgd->mtx);
3693
86552017 3694 out:
7da7cc1d 3695 mutex_lock(&sdata->local->mtx);
bc83b681 3696 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3697 mutex_unlock(&sdata->local->mtx);
bc83b681 3698
86552017
JB		 3699 if (sent_frame)
3700 __cfg80211_send_deauth(sdata->dev, frame_buf,
3701 IEEE80211_DEAUTH_FRAME_LEN);
3702
f0706e82
JB		 3703 return 0;
3704}
84363e6e 3705
77fdaa12 3706int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3707 struct cfg80211_disassoc_request *req)
9c6bd790 3708{
77fdaa12 3709 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3710 u8 bssid[ETH_ALEN];
6ae16775 3711 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 3712
77fdaa12 3713 mutex_lock(&ifmgd->mtx);
10f644a4 3714
8d8b261a
JB		 3715 /*
3716 * cfg80211 should catch this ... but it's racy since
3717 * we can receive a disassoc frame, process it, hand it
3718 * to cfg80211 while that's in a locked section already
3719 * trying to tell us that the user wants to disconnect.
3720 */
0c1ad2ca 3721 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3722 mutex_unlock(&ifmgd->mtx);
3723 return -ENOLINK;
3724 }
3725
bdcbd8e0
JB		 3726 sdata_info(sdata,
3727 "disassociating from %pM by local choice (reason=%d)\n",
3728 req->bss->bssid, req->reason_code);
0ff71613 3729
e69e95db 3730 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3731 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3732 req->reason_code, !req->local_state_change,
3733 frame_buf);
77fdaa12 3734 mutex_unlock(&ifmgd->mtx);
10f644a4 3735
6ae16775
AQ		 3736 __cfg80211_send_disassoc(sdata->dev, frame_buf,
3737 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 3738
7da7cc1d 3739 mutex_lock(&sdata->local->mtx);
bc83b681 3740 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3741 mutex_unlock(&sdata->local->mtx);
bc83b681 3742
10f644a4
JB		 3743 return 0;
3744}
026331c4 3745
afa762f6 3746void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3747{
3748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3749
3750 mutex_lock(&ifmgd->mtx);
3751 if (ifmgd->assoc_data)
3752 ieee80211_destroy_assoc_data(sdata, false);
3753 if (ifmgd->auth_data)
3754 ieee80211_destroy_auth_data(sdata, false);
3755 del_timer_sync(&ifmgd->timer);
3756 mutex_unlock(&ifmgd->mtx);
3757}
3758
a97c13c3
JO		 3759void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3760 enum nl80211_cqm_rssi_threshold_event rssi_event,
3761 gfp_t gfp)
3762{
3763 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3764
b5878a2d
JB		 3765 trace_api_cqm_rssi_notify(sdata, rssi_event);
3766
a97c13c3
JO		 3767 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3768}
3769EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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