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mac80211: add channel context iterator
[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 */
356 pos = skb_put(skb, sizeof(struct ieee80211_vht_capabilities) + 2);
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 */
d545daba 415 2 + sizeof(struct ieee80211_vht_capabilities) + /* 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
823static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
04b7b2ff
JB		 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)
cc32abd4
JB		 835 return;
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)
876 return;
877
878 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
879
880 if (sdata->local->ap_power_level == new_ap_level)
881 return;
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);
887 sdata->local->ap_power_level = new_ap_level;
888 ieee80211_hw_config(sdata->local, 0);
cc32abd4
JB		 889}
890
f90754c1
JO		 891void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
892{
893 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
894 struct ieee80211_local *local = sdata->local;
895 struct ieee80211_conf *conf = &local->hw.conf;
896
897 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
898 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
899 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
900
901 local->disable_dynamic_ps = false;
902 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
903}
904EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
905
906void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
907{
908 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
909 struct ieee80211_local *local = sdata->local;
910 struct ieee80211_conf *conf = &local->hw.conf;
911
912 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
913 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
914 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
915
916 local->disable_dynamic_ps = true;
917 conf->dynamic_ps_timeout = 0;
918 del_timer_sync(&local->dynamic_ps_timer);
919 ieee80211_queue_work(&local->hw,
920 &local->dynamic_ps_enable_work);
921}
922EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
923
965bedad
JB		 924/* powersave */
925static void ieee80211_enable_ps(struct ieee80211_local *local,
926 struct ieee80211_sub_if_data *sdata)
927{
928 struct ieee80211_conf *conf = &local->hw.conf;
929
d5edaedc
JB		 930 /*
931 * If we are scanning right now then the parameters will
932 * take effect when scan finishes.
933 */
fbe9c429 934 if (local->scanning)
d5edaedc
JB		 935 return;
936
965bedad
JB		 937 if (conf->dynamic_ps_timeout > 0 &&
938 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
939 mod_timer(&local->dynamic_ps_timer, jiffies +
940 msecs_to_jiffies(conf->dynamic_ps_timeout));
941 } else {
942 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
943 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 944
2a13052f
JO		 945 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
946 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
947 return;
948
949 conf->flags |= IEEE80211_CONF_PS;
950 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 951 }
952}
953
954static void ieee80211_change_ps(struct ieee80211_local *local)
955{
956 struct ieee80211_conf *conf = &local->hw.conf;
957
958 if (local->ps_sdata) {
965bedad
JB		 959 ieee80211_enable_ps(local, local->ps_sdata);
960 } else if (conf->flags & IEEE80211_CONF_PS) {
961 conf->flags &= ~IEEE80211_CONF_PS;
962 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
963 del_timer_sync(&local->dynamic_ps_timer);
964 cancel_work_sync(&local->dynamic_ps_enable_work);
965 }
966}
967
808118cb
JY		 968static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
969{
970 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
971 struct sta_info *sta = NULL;
c2c98fde 972 bool authorized = false;
808118cb
JY		 973
974 if (!mgd->powersave)
975 return false;
976
05cb9108
JB		 977 if (mgd->broken_ap)
978 return false;
979
808118cb
JY		 980 if (!mgd->associated)
981 return false;
982
808118cb
JY		 983 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
984 IEEE80211_STA_CONNECTION_POLL))
985 return false;
986
987 rcu_read_lock();
988 sta = sta_info_get(sdata, mgd->bssid);
989 if (sta)
c2c98fde 990 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 991 rcu_read_unlock();
992
c2c98fde 993 return authorized;
808118cb
JY		 994}
995
965bedad 996/* need to hold RTNL or interface lock */
10f644a4 997void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 998{
999 struct ieee80211_sub_if_data *sdata, *found = NULL;
1000 int count = 0;
195e294d 1001 int timeout;
965bedad
JB		 1002
1003 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1004 local->ps_sdata = NULL;
1005 return;
1006 }
1007
1008 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1009 if (!ieee80211_sdata_running(sdata))
965bedad 1010 continue;
8c7914de
RM		 1011 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1012 /* If an AP vif is found, then disable PS
1013 * by setting the count to zero thereby setting
1014 * ps_sdata to NULL.
1015 */
1016 count = 0;
1017 break;
1018 }
965bedad
JB		 1019 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1020 continue;
1021 found = sdata;
1022 count++;
1023 }
1024
808118cb 1025 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1026 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1027 s32 beaconint_us;
1028
1029 if (latency < 0)
ed77134b 1030 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1031
1032 beaconint_us = ieee80211_tu_to_usec(
1033 found->vif.bss_conf.beacon_int);
1034
ff616381 1035 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1036 if (timeout < 0) {
1037 /*
ff616381
JO		 1038 * Go to full PSM if the user configures a very low
1039 * latency requirement.
0ab82b04
EP		 1040 * The 2000 second value is there for compatibility
1041 * until the PM_QOS_NETWORK_LATENCY is configured
1042 * with real values.
195e294d 1043 */
0ab82b04
EP		 1044 if (latency > (1900 * USEC_PER_MSEC) &&
1045 latency != (2000 * USEC_PER_SEC))
195e294d 1046 timeout = 0;
ff616381
JO		 1047 else
1048 timeout = 100;
195e294d 1049 }
f90754c1
JO		 1050 local->dynamic_ps_user_timeout = timeout;
1051 if (!local->disable_dynamic_ps)
1052 conf->dynamic_ps_timeout =
1053 local->dynamic_ps_user_timeout;
195e294d 1054
04fe2037 1055 if (beaconint_us > latency) {
10f644a4 1056 local->ps_sdata = NULL;
04fe2037 1057 } else {
56007a02 1058 struct ieee80211_bss *bss;
04fe2037 1059 int maxslp = 1;
56007a02 1060 u8 dtimper;
04fe2037 1061
56007a02
JB		 1062 bss = (void *)found->u.mgd.associated->priv;
1063 dtimper = bss->dtim_period;
1064
1065 /* If the TIM IE is invalid, pretend the value is 1 */
1066 if (!dtimper)
1067 dtimper = 1;
1068 else if (dtimper > 1)
04fe2037
JB		 1069 maxslp = min_t(int, dtimper,
1070 latency / beaconint_us);
1071
9ccebe61 1072 local->hw.conf.max_sleep_period = maxslp;
56007a02 1073 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1074 local->ps_sdata = found;
04fe2037 1075 }
10f644a4 1076 } else {
965bedad 1077 local->ps_sdata = NULL;
10f644a4 1078 }
965bedad
JB		 1079
1080 ieee80211_change_ps(local);
1081}
1082
ab095877
EP		 1083void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1084{
1085 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1086
1087 if (sdata->vif.bss_conf.ps != ps_allowed) {
1088 sdata->vif.bss_conf.ps = ps_allowed;
1089 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1090 }
1091}
1092
965bedad
JB		 1093void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1094{
1095 struct ieee80211_local *local =
1096 container_of(work, struct ieee80211_local,
1097 dynamic_ps_disable_work);
1098
1099 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1100 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1101 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1102 }
1103
1104 ieee80211_wake_queues_by_reason(&local->hw,
1105 IEEE80211_QUEUE_STOP_REASON_PS);
1106}
1107
1108void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1109{
1110 struct ieee80211_local *local =
1111 container_of(work, struct ieee80211_local,
1112 dynamic_ps_enable_work);
1113 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1114 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1115 unsigned long flags;
1116 int q;
965bedad
JB		 1117
1118 /* can only happen when PS was just disabled anyway */
1119 if (!sdata)
1120 return;
1121
5e34069c
CL		 1122 ifmgd = &sdata->u.mgd;
1123
965bedad
JB		 1124 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1125 return;
1126
77b7023a
AN		 1127 if (!local->disable_dynamic_ps &&
1128 local->hw.conf.dynamic_ps_timeout > 0) {
1129 /* don't enter PS if TX frames are pending */
1130 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1131 mod_timer(&local->dynamic_ps_timer, jiffies +
1132 msecs_to_jiffies(
1133 local->hw.conf.dynamic_ps_timeout));
1134 return;
1135 }
77b7023a
AN		 1136
1137 /*
1138 * transmission can be stopped by others which leads to
1139 * dynamic_ps_timer expiry. Postpone the ps timer if it
1140 * is not the actual idle state.
1141 */
1142 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1143 for (q = 0; q < local->hw.queues; q++) {
1144 if (local->queue_stop_reasons[q]) {
1145 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1146 flags);
1147 mod_timer(&local->dynamic_ps_timer, jiffies +
1148 msecs_to_jiffies(
1149 local->hw.conf.dynamic_ps_timeout));
1150 return;
1151 }
1152 }
1153 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1154 }
1ddc2867 1155
375177bf 1156 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1157 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1158 netif_tx_stop_all_queues(sdata->dev);
965bedad 1159
e8306f98
VN		 1160 if (drv_tx_frames_pending(local))
1161 mod_timer(&local->dynamic_ps_timer, jiffies +
1162 msecs_to_jiffies(
1163 local->hw.conf.dynamic_ps_timeout));
1164 else {
1165 ieee80211_send_nullfunc(local, sdata, 1);
1166 /* Flush to get the tx status of nullfunc frame */
1167 drv_flush(local, false);
1168 }
f3e85b9e
VN		 1169 }
1170
2a13052f
JO		 1171 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1172 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1173 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1174 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1175 local->hw.conf.flags |= IEEE80211_CONF_PS;
1176 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1177 }
f3e85b9e 1178
77b7023a
AN		 1179 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1180 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1181}
1182
1183void ieee80211_dynamic_ps_timer(unsigned long data)
1184{
1185 struct ieee80211_local *local = (void *) data;
1186
78f1a8b7 1187 if (local->quiescing || local->suspended)
5bb644a0
JB		 1188 return;
1189
42935eca 1190 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1191}
1192
60f8b39c 1193/* MLME */
7d25745d 1194static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1195 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1196 u8 *wmm_param, size_t wmm_param_len)
1197{
f0706e82 1198 struct ieee80211_tx_queue_params params;
4ced3f74 1199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1200 size_t left;
1201 int count;
ab13315a 1202 u8 *pos, uapsd_queues = 0;
f0706e82 1203
e1b3ec1a 1204 if (!local->ops->conf_tx)
7d25745d 1205 return false;
e1b3ec1a 1206
32c5057b 1207 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1208 return false;
3434fbd3
JB		 1209
1210 if (!wmm_param)
7d25745d 1211 return false;
3434fbd3 1212
f0706e82 1213 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1214 return false;
ab13315a
KV		 1215
1216 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1217 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1218
f0706e82 1219 count = wmm_param[6] & 0x0f;
46900298 1220 if (count == ifmgd->wmm_last_param_set)
7d25745d 1221 return false;
46900298 1222 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1223
1224 pos = wmm_param + 8;
1225 left = wmm_param_len - 8;
1226
1227 memset(&params, 0, sizeof(params));
1228
00e96dec 1229 sdata->wmm_acm = 0;
f0706e82
JB		 1230 for (; left >= 4; left -= 4, pos += 4) {
1231 int aci = (pos[0] >> 5) & 0x03;
1232 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1233 bool uapsd = false;
f0706e82
JB		 1234 int queue;
1235
1236 switch (aci) {
0eeb59fe 1237 case 1: /* AC_BK */
e100bb64 1238 queue = 3;
988c0f72 1239 if (acm)
00e96dec 1240 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1241 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1242 uapsd = true;
f0706e82 1243 break;
0eeb59fe 1244 case 2: /* AC_VI */
e100bb64 1245 queue = 1;
988c0f72 1246 if (acm)
00e96dec 1247 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1248 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1249 uapsd = true;
f0706e82 1250 break;
0eeb59fe 1251 case 3: /* AC_VO */
e100bb64 1252 queue = 0;
988c0f72 1253 if (acm)
00e96dec 1254 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1255 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1256 uapsd = true;
f0706e82 1257 break;
0eeb59fe 1258 case 0: /* AC_BE */
f0706e82 1259 default:
e100bb64 1260 queue = 2;
988c0f72 1261 if (acm)
00e96dec 1262 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1263 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1264 uapsd = true;
f0706e82
JB		 1265 break;
1266 }
1267
1268 params.aifs = pos[0] & 0x0f;
1269 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1270 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1271 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1272 params.uapsd = uapsd;
1273
bdcbd8e0
JB		 1274 mlme_dbg(sdata,
1275 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1276 queue, aci, acm,
1277 params.aifs, params.cw_min, params.cw_max,
1278 params.txop, params.uapsd);
f6f3def3
EP		 1279 sdata->tx_conf[queue] = params;
1280 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1281 sdata_err(sdata,
1282 "failed to set TX queue parameters for queue %d\n",
1283 queue);
f0706e82 1284 }
e1b3ec1a
SG		 1285
1286 /* enable WMM or activate new settings */
4ced3f74 1287 sdata->vif.bss_conf.qos = true;
7d25745d 1288 return true;
f0706e82
JB		 1289}
1290
925e64c3
SG		 1291static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1292{
1293 lockdep_assert_held(&sdata->local->mtx);
1294
1295 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1296 IEEE80211_STA_BEACON_POLL);
1297 ieee80211_run_deferred_scan(sdata->local);
1298}
1299
1300static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1301{
1302 mutex_lock(&sdata->local->mtx);
1303 __ieee80211_stop_poll(sdata);
1304 mutex_unlock(&sdata->local->mtx);
1305}
1306
7a5158ef
JB		 1307static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1308 u16 capab, bool erp_valid, u8 erp)
5628221c 1309{
bda3933a 1310 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1311 u32 changed = 0;
7a5158ef
JB		 1312 bool use_protection;
1313 bool use_short_preamble;
1314 bool use_short_slot;
1315
1316 if (erp_valid) {
1317 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1318 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1319 } else {
1320 use_protection = false;
1321 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1322 }
1323
1324 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1325 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1326 use_short_slot = true;
5628221c 1327
471b3efd 1328 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1329 bss_conf->use_cts_prot = use_protection;
1330 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1331 }
7e9ed188 1332
d43c7b37 1333 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1334 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1335 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1336 }
d9430a32 1337
7a5158ef 1338 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1339 bss_conf->use_short_slot = use_short_slot;
1340 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1341 }
1342
1343 return changed;
1344}
1345
f698d856 1346static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1347 struct cfg80211_bss *cbss,
ae5eb026 1348 u32 bss_info_changed)
f0706e82 1349{
0c1ad2ca 1350 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1351 struct ieee80211_local *local = sdata->local;
68542962 1352 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1353
ae5eb026 1354 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1355 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1356 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1357
7ccc8bd7
FF		 1358 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1359 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1360
0c1ad2ca
JB		 1361 sdata->u.mgd.associated = cbss;
1362 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1363
17e4ec14
JM		 1364 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1365
b291ba11 1366 /* just to be sure */
925e64c3 1367 ieee80211_stop_poll(sdata);
b291ba11 1368
9ac19a90 1369 ieee80211_led_assoc(local, 1);
9306102e 1370
e5b900d2
JB		 1371 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1372 bss_conf->dtim_period = bss->dtim_period;
1373 else
1374 bss_conf->dtim_period = 0;
1375
68542962 1376 bss_conf->assoc = 1;
9cef8737 1377
a97c13c3 1378 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1379 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1380 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1381 bss_info_changed |= BSS_CHANGED_CQM;
1382
68542962
JO		 1383 /* Enable ARP filtering */
1384 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1385 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1386 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1387 }
1388
ae5eb026 1389 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1390
056508dc
JB		 1391 mutex_lock(&local->iflist_mtx);
1392 ieee80211_recalc_ps(local, -1);
1393 mutex_unlock(&local->iflist_mtx);
e0cb686f 1394
04ecd257 1395 ieee80211_recalc_smps(sdata);
ab095877
EP		 1396 ieee80211_recalc_ps_vif(sdata);
1397
8a5b33f5 1398 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1399 netif_carrier_on(sdata->dev);
f0706e82
JB		 1400}
1401
e69e95db 1402static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1403 u16 stype, u16 reason, bool tx,
1404 u8 *frame_buf)
aa458d17 1405{
46900298 1406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1407 struct ieee80211_local *local = sdata->local;
1408 struct sta_info *sta;
3cc5240b 1409 u32 changed = 0;
aa458d17 1410
77fdaa12
JB		 1411 ASSERT_MGD_MTX(ifmgd);
1412
37ad3888
JB		 1413 if (WARN_ON_ONCE(tx && !frame_buf))
1414 return;
1415
b291ba11
JB		 1416 if (WARN_ON(!ifmgd->associated))
1417 return;
1418
79543d8e
DS		 1419 ieee80211_stop_poll(sdata);
1420
77fdaa12 1421 ifmgd->associated = NULL;
77fdaa12
JB		 1422
1423 /*
1424 * we need to commit the associated = NULL change because the
1425 * scan code uses that to determine whether this iface should
1426 * go to/wake up from powersave or not -- and could otherwise
1427 * wake the queues erroneously.
1428 */
1429 smp_mb();
1430
1431 /*
1432 * Thus, we can only afterwards stop the queues -- to account
1433 * for the case where another CPU is finishing a scan at this
1434 * time -- we don't want the scan code to enable queues.
1435 */
aa458d17 1436
8a5b33f5 1437 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1438 netif_carrier_off(sdata->dev);
1439
2a419056 1440 mutex_lock(&local->sta_mtx);
88a9e31c 1441 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1442 if (sta) {
c2c98fde 1443 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
7f161146 1444 ieee80211_sta_tear_down_BA_sessions(sta, false);
4cad6c7c 1445 }
2a419056 1446 mutex_unlock(&local->sta_mtx);
aa458d17 1447
88bc40e8
EP		 1448 /*
1449 * if we want to get out of ps before disassoc (why?) we have
1450 * to do it before sending disassoc, as otherwise the null-packet
1451 * won't be valid.
1452 */
1453 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1454 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1455 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1456 }
1457 local->ps_sdata = NULL;
1458
ab095877
EP		 1459 /* disable per-vif ps */
1460 ieee80211_recalc_ps_vif(sdata);
1461
f823981e
EP		 1462 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1463 if (tx)
1464 drv_flush(local, false);
1465
37ad3888
JB		 1466 /* deauthenticate/disassociate now */
1467 if (tx || frame_buf)
88a9e31c
EP		 1468 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1469 reason, tx, frame_buf);
37ad3888
JB		 1470
1471 /* flush out frame */
1472 if (tx)
1473 drv_flush(local, false);
1474
88a9e31c
EP		 1475 /* clear bssid only after building the needed mgmt frames */
1476 memset(ifmgd->bssid, 0, ETH_ALEN);
1477
37ad3888
JB		 1478 /* remove AP and TDLS peers */
1479 sta_info_flush(local, sdata);
1480
1481 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1482 changed |= ieee80211_reset_erp_info(sdata);
1483
f5e5bf25 1484 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1485 changed |= BSS_CHANGED_ASSOC;
1486 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1487
413ad50a 1488 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1489 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1490 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1491
04b7b2ff 1492 local->ap_power_level = 0;
a8302de9 1493
520eb820
KV		 1494 del_timer_sync(&local->dynamic_ps_timer);
1495 cancel_work_sync(&local->dynamic_ps_enable_work);
1496
68542962
JO		 1497 /* Disable ARP filtering */
1498 if (sdata->vif.bss_conf.arp_filter_enabled) {
1499 sdata->vif.bss_conf.arp_filter_enabled = false;
1500 changed |= BSS_CHANGED_ARP_FILTER;
1501 }
1502
3abead59
JB		 1503 sdata->vif.bss_conf.qos = false;
1504 changed |= BSS_CHANGED_QOS;
1505
0aaffa9b
JB		 1506 /* The BSSID (not really interesting) and HT changed */
1507 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1508 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1509
55de908a 1510 ieee80211_vif_release_channel(sdata);
3cc5240b 1511
3abead59
JB		 1512 /* disassociated - set to defaults now */
1513 ieee80211_set_wmm_default(sdata, false);
1514
b9dcf712
JB		 1515 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1516 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1517 del_timer_sync(&sdata->u.mgd.timer);
1518 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1519
1520 sdata->u.mgd.timers_running = 0;
aa458d17 1521}
f0706e82 1522
3cf335d5
KV		 1523void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1524 struct ieee80211_hdr *hdr)
1525{
1526 /*
1527 * We can postpone the mgd.timer whenever receiving unicast frames
1528 * from AP because we know that the connection is working both ways
1529 * at that time. But multicast frames (and hence also beacons) must
1530 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1531 * data idle periods for sending the periodic probe request to the
1532 * AP we're connected to.
3cf335d5 1533 */
b291ba11
JB		 1534 if (is_multicast_ether_addr(hdr->addr1))
1535 return;
1536
be099e82 1537 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1538}
f0706e82 1539
4e5ff376
FF		 1540static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1541{
1542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1543 struct ieee80211_local *local = sdata->local;
4e5ff376 1544
133d40f9 1545 mutex_lock(&local->mtx);
4e5ff376 1546 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1547 IEEE80211_STA_CONNECTION_POLL))) {
1548 mutex_unlock(&local->mtx);
1549 return;
1550 }
4e5ff376 1551
925e64c3 1552 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1553
1554 mutex_lock(&local->iflist_mtx);
1555 ieee80211_recalc_ps(local, -1);
1556 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1557
1558 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1559 goto out;
4e5ff376
FF		 1560
1561 /*
1562 * We've received a probe response, but are not sure whether
1563 * we have or will be receiving any beacons or data, so let's
1564 * schedule the timers again, just in case.
1565 */
1566 ieee80211_sta_reset_beacon_monitor(sdata);
1567
1568 mod_timer(&ifmgd->conn_mon_timer,
1569 round_jiffies_up(jiffies +
1570 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1571out:
133d40f9 1572 mutex_unlock(&local->mtx);
4e5ff376
FF		 1573}
1574
1575void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1576 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1577{
75706d0e 1578 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1579 return;
1580
04ac3c0e
FF		 1581 if (ack)
1582 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1583
1584 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1585 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1586 if (ack)
1587 sdata->u.mgd.probe_send_count = 0;
1588 else
1589 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1590 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1591 }
1592}
1593
a43abf29
ML		 1594static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1595{
1596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1597 const u8 *ssid;
f01a067d 1598 u8 *dst = ifmgd->associated->bssid;
180205bd 1599 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1600
1601 /*
1602 * Try sending broadcast probe requests for the last three
1603 * probe requests after the first ones failed since some
1604 * buggy APs only support broadcast probe requests.
1605 */
1606 if (ifmgd->probe_send_count >= unicast_limit)
1607 dst = NULL;
a43abf29 1608
4e5ff376
FF		 1609 /*
1610 * When the hardware reports an accurate Tx ACK status, it's
1611 * better to send a nullfunc frame instead of a probe request,
1612 * as it will kick us off the AP quickly if we aren't associated
1613 * anymore. The timeout will be reset if the frame is ACKed by
1614 * the AP.
1615 */
992e68bf
SD		 1616 ifmgd->probe_send_count++;
1617
04ac3c0e
FF		 1618 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1619 ifmgd->nullfunc_failed = false;
4e5ff376 1620 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1621 } else {
88c868c4
SG		 1622 int ssid_len;
1623
4e5ff376 1624 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1625 if (WARN_ON_ONCE(ssid == NULL))
1626 ssid_len = 0;
1627 else
1628 ssid_len = ssid[1];
1629
1630 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
fe94fe05 1631 0, (u32) -1, true, false,
55de908a 1632 ifmgd->associated->channel, false);
4e5ff376 1633 }
a43abf29 1634
180205bd 1635 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1636 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1637 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1638 drv_flush(sdata->local, false);
a43abf29
ML		 1639}
1640
b291ba11
JB		 1641static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1642 bool beacon)
04de8381 1643{
04de8381 1644 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1645 bool already = false;
34bfc411 1646
9607e6b6 1647 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1648 return;
1649
77fdaa12
JB		 1650 mutex_lock(&ifmgd->mtx);
1651
1652 if (!ifmgd->associated)
1653 goto out;
1654
133d40f9
SG		 1655 mutex_lock(&sdata->local->mtx);
1656
1657 if (sdata->local->tmp_channel || sdata->local->scanning) {
1658 mutex_unlock(&sdata->local->mtx);
1659 goto out;
1660 }
1661
e87cc472 1662 if (beacon)
bdcbd8e0
JB		 1663 mlme_dbg_ratelimited(sdata,
1664 "detected beacon loss from AP - sending probe request\n");
1665
6efb71b0
HS		 1666 ieee80211_cqm_rssi_notify(&sdata->vif,
1667 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1668
b291ba11
JB		 1669 /*
1670 * The driver/our work has already reported this event or the
1671 * connection monitoring has kicked in and we have already sent
1672 * a probe request. Or maybe the AP died and the driver keeps
1673 * reporting until we disassociate...
1674 *
1675 * In either case we have to ignore the current call to this
1676 * function (except for setting the correct probe reason bit)
1677 * because otherwise we would reset the timer every time and
1678 * never check whether we received a probe response!
1679 */
1680 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1681 IEEE80211_STA_CONNECTION_POLL))
1682 already = true;
1683
1684 if (beacon)
1685 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1686 else
1687 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1688
133d40f9
SG		 1689 mutex_unlock(&sdata->local->mtx);
1690
b291ba11
JB		 1691 if (already)
1692 goto out;
1693
4e751843
JB		 1694 mutex_lock(&sdata->local->iflist_mtx);
1695 ieee80211_recalc_ps(sdata->local, -1);
1696 mutex_unlock(&sdata->local->iflist_mtx);
1697
a43abf29
ML		 1698 ifmgd->probe_send_count = 0;
1699 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1700 out:
1701 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1702}
1703
a619a4c0
JO		 1704struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1705 struct ieee80211_vif *vif)
1706{
1707 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1708 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1709 struct cfg80211_bss *cbss;
a619a4c0
JO		 1710 struct sk_buff *skb;
1711 const u8 *ssid;
88c868c4 1712 int ssid_len;
a619a4c0
JO		 1713
1714 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1715 return NULL;
1716
1717 ASSERT_MGD_MTX(ifmgd);
1718
d9b3b28b
EP		 1719 if (ifmgd->associated)
1720 cbss = ifmgd->associated;
1721 else if (ifmgd->auth_data)
1722 cbss = ifmgd->auth_data->bss;
1723 else if (ifmgd->assoc_data)
1724 cbss = ifmgd->assoc_data->bss;
1725 else
a619a4c0
JO		 1726 return NULL;
1727
d9b3b28b 1728 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1729 if (WARN_ON_ONCE(ssid == NULL))
1730 ssid_len = 0;
1731 else
1732 ssid_len = ssid[1];
1733
d9b3b28b 1734 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1735 (u32) -1, cbss->channel,
6b77863b 1736 ssid + 2, ssid_len,
85a237fe 1737 NULL, 0, true);
a619a4c0
JO		 1738
1739 return skb;
1740}
1741EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1742
882a7c69
JB		 1743static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1744 bool transmit_frame)
1e4dcd01
JO		 1745{
1746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1747 struct ieee80211_local *local = sdata->local;
6ae16775 1748 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1749
1750 mutex_lock(&ifmgd->mtx);
1751 if (!ifmgd->associated) {
1752 mutex_unlock(&ifmgd->mtx);
1753 return;
1754 }
1755
37ad3888
JB		 1756 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1757 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
882a7c69
JB		 1758 transmit_frame, frame_buf);
1759 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1760 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1761
1e4dcd01
JO		 1762 /*
1763 * must be outside lock due to cfg80211,
1764 * but that's not a problem.
1765 */
6ae16775 1766 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 1767
1768 mutex_lock(&local->mtx);
1769 ieee80211_recalc_idle(local);
1770 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1771}
1772
cc74c0c7 1773static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1774{
1775 struct ieee80211_sub_if_data *sdata =
1776 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1777 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1779 struct sta_info *sta;
1780
1781 if (ifmgd->associated) {
30fa9047 1782 rcu_read_lock();
a85e1d55
PS		 1783 sta = sta_info_get(sdata, ifmgd->bssid);
1784 if (sta)
1785 sta->beacon_loss_count++;
30fa9047 1786 rcu_read_unlock();
a85e1d55 1787 }
b291ba11 1788
882a7c69
JB		 1789 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1790 sdata_info(sdata, "Connection to AP %pM lost\n",
1791 ifmgd->bssid);
1792 __ieee80211_disconnect(sdata, false);
1793 } else {
1e4dcd01 1794 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1795 }
1796}
1797
1798static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1799{
1800 struct ieee80211_sub_if_data *sdata =
1801 container_of(work, struct ieee80211_sub_if_data,
1802 u.mgd.csa_connection_drop_work);
1803
1804 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1805 IEEE80211_QUEUE_STOP_REASON_CSA);
1806 __ieee80211_disconnect(sdata, true);
b291ba11
JB		 1807}
1808
04de8381
KV		 1809void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1810{
1811 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1812 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1813
b5878a2d
JB		 1814 trace_api_beacon_loss(sdata);
1815
1e4dcd01
JO		 1816 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1817 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1818}
1819EXPORT_SYMBOL(ieee80211_beacon_loss);
1820
1e4dcd01
JO		 1821void ieee80211_connection_loss(struct ieee80211_vif *vif)
1822{
1823 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1824 struct ieee80211_hw *hw = &sdata->local->hw;
1825
b5878a2d
JB		 1826 trace_api_connection_loss(sdata);
1827
1e4dcd01
JO		 1828 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1829 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1830}
1831EXPORT_SYMBOL(ieee80211_connection_loss);
1832
1833
66e67e41
JB		 1834static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1835 bool assoc)
1836{
1837 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1838
1839 lockdep_assert_held(&sdata->u.mgd.mtx);
1840
66e67e41
JB		 1841 if (!assoc) {
1842 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1843
1844 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1845 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
55de908a 1846 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1847 }
1848
1849 cfg80211_put_bss(auth_data->bss);
1850 kfree(auth_data);
1851 sdata->u.mgd.auth_data = NULL;
1852}
1853
1854static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1855 struct ieee80211_mgmt *mgmt, size_t len)
1856{
1857 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1858 u8 *pos;
1859 struct ieee802_11_elems elems;
1860
1861 pos = mgmt->u.auth.variable;
1862 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1863 if (!elems.challenge)
1864 return;
1865 auth_data->expected_transaction = 4;
a1845fc7 1866 drv_mgd_prepare_tx(sdata->local, sdata);
66e67e41
JB		 1867 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1868 elems.challenge - 2, elems.challenge_len + 2,
1869 auth_data->bss->bssid, auth_data->bss->bssid,
1870 auth_data->key, auth_data->key_len,
1871 auth_data->key_idx);
1872}
1873
1874static enum rx_mgmt_action __must_check
1875ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1876 struct ieee80211_mgmt *mgmt, size_t len)
1877{
1878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1879 u8 bssid[ETH_ALEN];
1880 u16 auth_alg, auth_transaction, status_code;
1881 struct sta_info *sta;
1882
1883 lockdep_assert_held(&ifmgd->mtx);
1884
1885 if (len < 24 + 6)
1886 return RX_MGMT_NONE;
1887
1888 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1889 return RX_MGMT_NONE;
1890
1891 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1892
b203ca39 1893 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1894 return RX_MGMT_NONE;
1895
1896 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1897 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1898 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1899
1900 if (auth_alg != ifmgd->auth_data->algorithm ||
1901 auth_transaction != ifmgd->auth_data->expected_transaction)
1902 return RX_MGMT_NONE;
1903
1904 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1905 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1906 mgmt->sa, status_code);
dac211ec
EP		 1907 ieee80211_destroy_auth_data(sdata, false);
1908 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1909 }
1910
1911 switch (ifmgd->auth_data->algorithm) {
1912 case WLAN_AUTH_OPEN:
1913 case WLAN_AUTH_LEAP:
1914 case WLAN_AUTH_FT:
1915 break;
1916 case WLAN_AUTH_SHARED_KEY:
1917 if (ifmgd->auth_data->expected_transaction != 4) {
1918 ieee80211_auth_challenge(sdata, mgmt, len);
1919 /* need another frame */
1920 return RX_MGMT_NONE;
1921 }
1922 break;
1923 default:
1924 WARN_ONCE(1, "invalid auth alg %d",
1925 ifmgd->auth_data->algorithm);
1926 return RX_MGMT_NONE;
1927 }
1928
bdcbd8e0 1929 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1930 ifmgd->auth_data->done = true;
1931 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1932 run_again(ifmgd, ifmgd->auth_data->timeout);
1933
1934 /* move station state to auth */
1935 mutex_lock(&sdata->local->sta_mtx);
1936 sta = sta_info_get(sdata, bssid);
1937 if (!sta) {
1938 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1939 goto out_err;
1940 }
1941 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1942 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1943 goto out_err;
1944 }
1945 mutex_unlock(&sdata->local->sta_mtx);
1946
1947 return RX_MGMT_CFG80211_RX_AUTH;
1948 out_err:
1949 mutex_unlock(&sdata->local->sta_mtx);
1950 /* ignore frame -- wait for timeout */
1951 return RX_MGMT_NONE;
1952}
1953
1954
77fdaa12
JB		 1955static enum rx_mgmt_action __must_check
1956ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1957 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1958{
46900298 1959 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1960 const u8 *bssid = NULL;
f0706e82
JB		 1961 u16 reason_code;
1962
66e67e41
JB		 1963 lockdep_assert_held(&ifmgd->mtx);
1964
f4ea83dd 1965 if (len < 24 + 2)
77fdaa12 1966 return RX_MGMT_NONE;
f0706e82 1967
66e67e41 1968 if (!ifmgd->associated ||
b203ca39 1969 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1970 return RX_MGMT_NONE;
77fdaa12 1971
0c1ad2ca 1972 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1973
1974 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1975
bdcbd8e0
JB		 1976 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1977 bssid, reason_code);
77fdaa12 1978
37ad3888
JB		 1979 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1980
7da7cc1d 1981 mutex_lock(&sdata->local->mtx);
63f170e0 1982 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1983 mutex_unlock(&sdata->local->mtx);
f0706e82 1984
77fdaa12 1985 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1986}
1987
1988
77fdaa12
JB		 1989static enum rx_mgmt_action __must_check
1990ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1991 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1992{
46900298 1993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1994 u16 reason_code;
1995
66e67e41 1996 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1997
66e67e41 1998 if (len < 24 + 2)
77fdaa12
JB		 1999 return RX_MGMT_NONE;
2000
66e67e41 2001 if (!ifmgd->associated ||
b203ca39 2002 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2003 return RX_MGMT_NONE;
f0706e82
JB		 2004
2005 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2006
bdcbd8e0
JB		 2007 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2008 mgmt->sa, reason_code);
f0706e82 2009
37ad3888
JB		 2010 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2011
7da7cc1d 2012 mutex_lock(&sdata->local->mtx);
bc83b681 2013 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2014 mutex_unlock(&sdata->local->mtx);
37ad3888 2015
77fdaa12 2016 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2017}
2018
c74d084f
CL		 2019static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2020 u8 *supp_rates, unsigned int supp_rates_len,
2021 u32 *rates, u32 *basic_rates,
2022 bool *have_higher_than_11mbit,
2023 int *min_rate, int *min_rate_index)
2024{
2025 int i, j;
2026
2027 for (i = 0; i < supp_rates_len; i++) {
2028 int rate = (supp_rates[i] & 0x7f) * 5;
2029 bool is_basic = !!(supp_rates[i] & 0x80);
2030
2031 if (rate > 110)
2032 *have_higher_than_11mbit = true;
2033
2034 /*
2035 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2036 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2037 *
2038 * Note: Even through the membership selector and the basic
2039 * rate flag share the same bit, they are not exactly
2040 * the same.
2041 */
2042 if (!!(supp_rates[i] & 0x80) &&
2043 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2044 continue;
2045
2046 for (j = 0; j < sband->n_bitrates; j++) {
2047 if (sband->bitrates[j].bitrate == rate) {
2048 *rates |= BIT(j);
2049 if (is_basic)
2050 *basic_rates |= BIT(j);
2051 if (rate < *min_rate) {
2052 *min_rate = rate;
2053 *min_rate_index = j;
2054 }
2055 break;
2056 }
2057 }
2058 }
2059}
f0706e82 2060
66e67e41
JB		 2061static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2062 bool assoc)
2063{
2064 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2065
2066 lockdep_assert_held(&sdata->u.mgd.mtx);
2067
66e67e41
JB		 2068 if (!assoc) {
2069 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2070
2071 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2072 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
55de908a 2073 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2074 }
2075
2076 kfree(assoc_data);
2077 sdata->u.mgd.assoc_data = NULL;
2078}
2079
2080static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2081 struct cfg80211_bss *cbss,
af6b6374 2082 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2083{
46900298 2084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2085 struct ieee80211_local *local = sdata->local;
8318d78a 2086 struct ieee80211_supported_band *sband;
f0706e82 2087 struct sta_info *sta;
af6b6374 2088 u8 *pos;
af6b6374 2089 u16 capab_info, aid;
f0706e82 2090 struct ieee802_11_elems elems;
bda3933a 2091 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2092 u32 changed = 0;
c74d084f 2093 int err;
f0706e82 2094
af6b6374 2095 /* AssocResp and ReassocResp have identical structure */
f0706e82 2096
f0706e82 2097 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2098 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2099
1dd84aa2 2100 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2101 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2102 aid);
1dd84aa2
JB		 2103 aid &= ~(BIT(15) | BIT(14));
2104
05cb9108
JB		 2105 ifmgd->broken_ap = false;
2106
2107 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2108 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2109 aid);
05cb9108
JB		 2110 aid = 0;
2111 ifmgd->broken_ap = true;
2112 }
2113
af6b6374
JB		 2114 pos = mgmt->u.assoc_resp.variable;
2115 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2116
f0706e82 2117 if (!elems.supp_rates) {
bdcbd8e0 2118 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2119 return false;
f0706e82
JB		 2120 }
2121
46900298 2122 ifmgd->aid = aid;
f0706e82 2123
2a33bee2
GE		 2124 mutex_lock(&sdata->local->sta_mtx);
2125 /*
2126 * station info was already allocated and inserted before
2127 * the association and should be available to us
2128 */
7852e361 2129 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2130 if (WARN_ON(!sta)) {
2131 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2132 return false;
77fdaa12 2133 }
05e5e883 2134
55de908a 2135 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2136
ab1faead 2137 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2138 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2139 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2140
64f68e5d
JB		 2141 sta->supports_40mhz =
2142 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2143
4b7679a5 2144 rate_control_rate_init(sta);
f0706e82 2145
46900298 2146 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2147 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2148
ddf4ac53 2149 if (elems.wmm_param)
c2c98fde 2150 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2151
c8987876
JB		 2152 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2153 if (!err)
2154 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2155 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2156 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2157 if (err) {
bdcbd8e0
JB		 2158 sdata_info(sdata,
2159 "failed to move station %pM to desired state\n",
2160 sta->sta.addr);
c8987876
JB		 2161 WARN_ON(__sta_info_destroy(sta));
2162 mutex_unlock(&sdata->local->sta_mtx);
2163 return false;
2164 }
2165
7852e361 2166 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2167
f2176d72
JO		 2168 /*
2169 * Always handle WMM once after association regardless
2170 * of the first value the AP uses. Setting -1 here has
2171 * that effect because the AP values is an unsigned
2172 * 4-bit value.
2173 */
2174 ifmgd->wmm_last_param_set = -1;
2175
ddf4ac53 2176 if (elems.wmm_param)
4ced3f74 2177 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2178 elems.wmm_param_len);
aa837e1d 2179 else
3abead59
JB		 2180 ieee80211_set_wmm_default(sdata, false);
2181 changed |= BSS_CHANGED_QOS;
f0706e82 2182
074d46d1 2183 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2184 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2185 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2186 cbss->bssid, false);
ae5eb026 2187
60f8b39c
JB		 2188 /* set AID and assoc capability,
2189 * ieee80211_set_associated() will tell the driver */
2190 bss_conf->aid = aid;
2191 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2192 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2193
d524215f
FF		 2194 /*
2195 * If we're using 4-addr mode, let the AP know that we're
2196 * doing so, so that it can create the STA VLAN on its side
2197 */
2198 if (ifmgd->use_4addr)
2199 ieee80211_send_4addr_nullfunc(local, sdata);
2200
15b7b062 2201 /*
b291ba11
JB		 2202 * Start timer to probe the connection to the AP now.
2203 * Also start the timer that will detect beacon loss.
15b7b062 2204 */
b291ba11 2205 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2206 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2207
af6b6374 2208 return true;
f0706e82
JB		 2209}
2210
66e67e41
JB		 2211static enum rx_mgmt_action __must_check
2212ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2213 struct ieee80211_mgmt *mgmt, size_t len,
2214 struct cfg80211_bss **bss)
2215{
2216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2217 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2218 u16 capab_info, status_code, aid;
2219 struct ieee802_11_elems elems;
2220 u8 *pos;
2221 bool reassoc;
2222
2223 lockdep_assert_held(&ifmgd->mtx);
2224
2225 if (!assoc_data)
2226 return RX_MGMT_NONE;
b203ca39 2227 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2228 return RX_MGMT_NONE;
2229
2230 /*
2231 * AssocResp and ReassocResp have identical structure, so process both
2232 * of them in this function.
2233 */
2234
2235 if (len < 24 + 6)
2236 return RX_MGMT_NONE;
2237
2238 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2239 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2240 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2241 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2242
bdcbd8e0
JB		 2243 sdata_info(sdata,
2244 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2245 reassoc ? "Rea" : "A", mgmt->sa,
2246 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2247
2248 pos = mgmt->u.assoc_resp.variable;
2249 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2250
2251 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2252 elems.timeout_int && elems.timeout_int_len == 5 &&
2253 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2254 u32 tu, ms;
2255 tu = get_unaligned_le32(elems.timeout_int + 1);
2256 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2257 sdata_info(sdata,
2258 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2259 mgmt->sa, tu, ms);
66e67e41
JB		 2260 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2261 if (ms > IEEE80211_ASSOC_TIMEOUT)
2262 run_again(ifmgd, assoc_data->timeout);
2263 return RX_MGMT_NONE;
2264 }
2265
2266 *bss = assoc_data->bss;
2267
2268 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2269 sdata_info(sdata, "%pM denied association (code=%d)\n",
2270 mgmt->sa, status_code);
66e67e41
JB		 2271 ieee80211_destroy_assoc_data(sdata, false);
2272 } else {
66e67e41
JB		 2273 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2274 /* oops -- internal error -- send timeout for now */
10a9109f 2275 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2276 cfg80211_put_bss(*bss);
2277 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2278 }
635d999f 2279 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2280
2281 /*
2282 * destroy assoc_data afterwards, as otherwise an idle
2283 * recalc after assoc_data is NULL but before associated
2284 * is set can cause the interface to go idle
2285 */
2286 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2287 }
2288
2289 return RX_MGMT_CFG80211_RX_ASSOC;
2290}
98c8fccf
JB		 2291static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2292 struct ieee80211_mgmt *mgmt,
2293 size_t len,
2294 struct ieee80211_rx_status *rx_status,
2295 struct ieee802_11_elems *elems,
2296 bool beacon)
2297{
2298 struct ieee80211_local *local = sdata->local;
2299 int freq;
c2b13452 2300 struct ieee80211_bss *bss;
98c8fccf 2301 struct ieee80211_channel *channel;
56007a02
JB		 2302 bool need_ps = false;
2303
66e67e41 2304 if (sdata->u.mgd.associated &&
b203ca39 2305 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2306 bss = (void *)sdata->u.mgd.associated->priv;
2307 /* not previously set so we may need to recalc */
2308 need_ps = !bss->dtim_period;
2309 }
98c8fccf
JB		 2310
2311 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2312 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2313 rx_status->band);
98c8fccf
JB		 2314 else
2315 freq = rx_status->freq;
2316
2317 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2318
2319 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2320 return;
2321
98c8fccf 2322 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2323 channel, beacon);
77fdaa12
JB		 2324 if (bss)
2325 ieee80211_rx_bss_put(local, bss);
2326
2327 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2328 return;
2329
56007a02
JB		 2330 if (need_ps) {
2331 mutex_lock(&local->iflist_mtx);
2332 ieee80211_recalc_ps(local, -1);
2333 mutex_unlock(&local->iflist_mtx);
2334 }
2335
5bc1420b
JB		 2336 if (elems->ch_switch_ie &&
2337 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2338 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2339 bss, rx_status->mactime);
f0706e82
JB		 2340}
2341
2342
f698d856 2343static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2344 struct sk_buff *skb)
f0706e82 2345{
af6b6374 2346 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2347 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2348 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2349 size_t baselen, len = skb->len;
ae6a44e3
EK		 2350 struct ieee802_11_elems elems;
2351
15b7b062
KV		 2352 ifmgd = &sdata->u.mgd;
2353
77fdaa12
JB		 2354 ASSERT_MGD_MTX(ifmgd);
2355
b203ca39 2356 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2357 return; /* ignore ProbeResp to foreign address */
2358
ae6a44e3
EK		 2359 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2360 if (baselen > len)
2361 return;
2362
2363 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2364 &elems);
2365
98c8fccf 2366 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2367
77fdaa12 2368 if (ifmgd->associated &&
b203ca39 2369 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2370 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2371
2372 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2373 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2374 /* got probe response, continue with auth */
bdcbd8e0 2375 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2376 ifmgd->auth_data->tries = 0;
2377 ifmgd->auth_data->timeout = jiffies;
2378 run_again(ifmgd, ifmgd->auth_data->timeout);
2379 }
f0706e82
JB		 2380}
2381
d91f36db
JB		 2382/*
2383 * This is the canonical list of information elements we care about,
2384 * the filter code also gives us all changes to the Microsoft OUI
2385 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2386 *
2387 * We implement beacon filtering in software since that means we can
2388 * avoid processing the frame here and in cfg80211, and userspace
2389 * will not be able to tell whether the hardware supports it or not.
2390 *
2391 * XXX: This list needs to be dynamic -- userspace needs to be able to
2392 * add items it requires. It also needs to be able to tell us to
2393 * look out for other vendor IEs.
2394 */
2395static const u64 care_about_ies =
1d4df3a5
JB		 2396 (1ULL << WLAN_EID_COUNTRY) |
2397 (1ULL << WLAN_EID_ERP_INFO) |
2398 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2399 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2400 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2401 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2402
f698d856 2403static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2404 struct ieee80211_mgmt *mgmt,
2405 size_t len,
2406 struct ieee80211_rx_status *rx_status)
2407{
d91f36db 2408 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2409 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2410 size_t baselen;
2411 struct ieee802_11_elems elems;
f698d856 2412 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2413 struct ieee80211_chanctx_conf *chanctx_conf;
2414 struct ieee80211_channel *chan;
471b3efd 2415 u32 changed = 0;
d91f36db 2416 bool erp_valid, directed_tim = false;
7a5158ef 2417 u8 erp_value = 0;
d91f36db 2418 u32 ncrc;
77fdaa12
JB		 2419 u8 *bssid;
2420
66e67e41 2421 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2422
ae6a44e3
EK		 2423 /* Process beacon from the current BSS */
2424 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2425 if (baselen > len)
2426 return;
2427
55de908a
JB		 2428 rcu_read_lock();
2429 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2430 if (!chanctx_conf) {
2431 rcu_read_unlock();
f0706e82 2432 return;
55de908a
JB		 2433 }
2434
2435 if (rx_status->freq != chanctx_conf->channel->center_freq) {
2436 rcu_read_unlock();
2437 return;
2438 }
2439 chan = chanctx_conf->channel;
2440 rcu_read_unlock();
f0706e82 2441
66e67e41 2442 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2443 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2444 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2445 len - baselen, &elems);
77fdaa12 2446
66e67e41
JB		 2447 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2448 false);
2449 ifmgd->assoc_data->have_beacon = true;
2450 ifmgd->assoc_data->sent_assoc = false;
2451 /* continue assoc process */
2452 ifmgd->assoc_data->timeout = jiffies;
2453 run_again(ifmgd, ifmgd->assoc_data->timeout);
2454 return;
2455 }
77fdaa12 2456
66e67e41 2457 if (!ifmgd->associated ||
b203ca39 2458 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2459 return;
66e67e41 2460 bssid = ifmgd->associated->bssid;
f0706e82 2461
17e4ec14
JM		 2462 /* Track average RSSI from the Beacon frames of the current AP */
2463 ifmgd->last_beacon_signal = rx_status->signal;
2464 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2465 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2466 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2467 ifmgd->last_cqm_event_signal = 0;
391a200a 2468 ifmgd->count_beacon_signal = 1;
615f7b9b 2469 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2470 } else {
2471 ifmgd->ave_beacon_signal =
2472 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2473 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2474 ifmgd->ave_beacon_signal) / 16;
391a200a 2475 ifmgd->count_beacon_signal++;
17e4ec14 2476 }
615f7b9b
MV		 2477
2478 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2479 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2480 int sig = ifmgd->ave_beacon_signal;
2481 int last_sig = ifmgd->last_ave_beacon_signal;
2482
2483 /*
2484 * if signal crosses either of the boundaries, invoke callback
2485 * with appropriate parameters
2486 */
2487 if (sig > ifmgd->rssi_max_thold &&
2488 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2489 ifmgd->last_ave_beacon_signal = sig;
2490 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2491 } else if (sig < ifmgd->rssi_min_thold &&
2492 (last_sig >= ifmgd->rssi_max_thold ||
2493 last_sig == 0)) {
2494 ifmgd->last_ave_beacon_signal = sig;
2495 drv_rssi_callback(local, RSSI_EVENT_LOW);
2496 }
2497 }
2498
17e4ec14 2499 if (bss_conf->cqm_rssi_thold &&
391a200a 2500 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2501 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2502 int sig = ifmgd->ave_beacon_signal / 16;
2503 int last_event = ifmgd->last_cqm_event_signal;
2504 int thold = bss_conf->cqm_rssi_thold;
2505 int hyst = bss_conf->cqm_rssi_hyst;
2506 if (sig < thold &&
2507 (last_event == 0 || sig < last_event - hyst)) {
2508 ifmgd->last_cqm_event_signal = sig;
2509 ieee80211_cqm_rssi_notify(
2510 &sdata->vif,
2511 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2512 GFP_KERNEL);
2513 } else if (sig > thold &&
2514 (last_event == 0 || sig > last_event + hyst)) {
2515 ifmgd->last_cqm_event_signal = sig;
2516 ieee80211_cqm_rssi_notify(
2517 &sdata->vif,
2518 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2519 GFP_KERNEL);
2520 }
2521 }
2522
b291ba11 2523 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2524 mlme_dbg_ratelimited(sdata,
2525 "cancelling probereq poll due to a received beacon\n");
925e64c3 2526 mutex_lock(&local->mtx);
b291ba11 2527 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2528 ieee80211_run_deferred_scan(local);
2529 mutex_unlock(&local->mtx);
2530
4e751843
JB		 2531 mutex_lock(&local->iflist_mtx);
2532 ieee80211_recalc_ps(local, -1);
2533 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2534 }
2535
b291ba11
JB		 2536 /*
2537 * Push the beacon loss detection into the future since
2538 * we are processing a beacon from the AP just now.
2539 */
d3a910a8 2540 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2541
d91f36db
JB		 2542 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2543 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2544 len - baselen, &elems,
2545 care_about_ies, ncrc);
2546
2547 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2548 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2549 ifmgd->aid);
d91f36db 2550
25c9c875 2551 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2552 if (directed_tim) {
572e0012 2553 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2554 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2555 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2556 ieee80211_hw_config(local,
2557 IEEE80211_CONF_CHANGE_PS);
2558 }
572e0012 2559 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2560 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2561 local->pspolling = true;
2562
2563 /*
2564 * Here is assumed that the driver will be
2565 * able to send ps-poll frame and receive a
2566 * response even though power save mode is
2567 * enabled, but some drivers might require
2568 * to disable power save here. This needs
2569 * to be investigated.
2570 */
2571 ieee80211_send_pspoll(local, sdata);
2572 }
a97b77b9
VN		 2573 }
2574 }
7a5158ef 2575
d8ec4433 2576 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2577 return;
2578 ifmgd->beacon_crc = ncrc;
d8ec4433 2579 ifmgd->beacon_crc_valid = true;
30196673 2580
7d25745d
JB		 2581 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2582 true);
2583
2584 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2585 elems.wmm_param_len))
2586 changed |= BSS_CHANGED_QOS;
2587
7a5158ef
JB		 2588 if (elems.erp_info && elems.erp_info_len >= 1) {
2589 erp_valid = true;
2590 erp_value = elems.erp_info[0];
2591 } else {
2592 erp_valid = false;
50c4afb9 2593 }
7a5158ef
JB		 2594 changed |= ieee80211_handle_bss_capability(sdata,
2595 le16_to_cpu(mgmt->u.beacon.capab_info),
2596 erp_valid, erp_value);
f0706e82 2597
d3c990fb 2598
074d46d1 2599 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2600 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2601 struct ieee80211_supported_band *sband;
ae5eb026 2602
55de908a 2603 sband = local->hw.wiphy->bands[chan->band];
ae5eb026 2604
24398e39
JB		 2605 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2606 bssid, true);
d3c990fb
RR		 2607 }
2608
04b7b2ff
JB		 2609 if (elems.country_elem && elems.pwr_constr_elem &&
2610 mgmt->u.probe_resp.capab_info &
2611 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
55de908a 2612 ieee80211_handle_pwr_constr(sdata, chan,
04b7b2ff
JB		 2613 elems.country_elem,
2614 elems.country_elem_len,
2615 elems.pwr_constr_elem);
3f2355cb 2616
471b3efd 2617 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2618}
2619
1fa57d01
JB		 2620void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2621 struct sk_buff *skb)
f0706e82 2622{
77fdaa12 2623 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2624 struct ieee80211_rx_status *rx_status;
f0706e82 2625 struct ieee80211_mgmt *mgmt;
66e67e41 2626 struct cfg80211_bss *bss = NULL;
77fdaa12 2627 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2628 u16 fc;
2629
f0706e82
JB		 2630 rx_status = (struct ieee80211_rx_status *) skb->cb;
2631 mgmt = (struct ieee80211_mgmt *) skb->data;
2632 fc = le16_to_cpu(mgmt->frame_control);
2633
77fdaa12
JB		 2634 mutex_lock(&ifmgd->mtx);
2635
66e67e41
JB		 2636 switch (fc & IEEE80211_FCTL_STYPE) {
2637 case IEEE80211_STYPE_BEACON:
2638 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2639 break;
2640 case IEEE80211_STYPE_PROBE_RESP:
2641 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2642 break;
2643 case IEEE80211_STYPE_AUTH:
2644 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2645 break;
2646 case IEEE80211_STYPE_DEAUTH:
2647 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2648 break;
2649 case IEEE80211_STYPE_DISASSOC:
2650 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2651 break;
2652 case IEEE80211_STYPE_ASSOC_RESP:
2653 case IEEE80211_STYPE_REASSOC_RESP:
2654 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2655 break;
2656 case IEEE80211_STYPE_ACTION:
2657 switch (mgmt->u.action.category) {
2658 case WLAN_CATEGORY_SPECTRUM_MGMT:
2659 ieee80211_sta_process_chanswitch(sdata,
2660 &mgmt->u.action.u.chan_switch.sw_elem,
2661 (void *)ifmgd->associated->priv,
2662 rx_status->mactime);
77fdaa12 2663 break;
77fdaa12 2664 }
77fdaa12 2665 }
77fdaa12
JB		 2666 mutex_unlock(&ifmgd->mtx);
2667
66e67e41
JB		 2668 switch (rma) {
2669 case RX_MGMT_NONE:
2670 /* no action */
2671 break;
2672 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2673 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2674 break;
2675 case RX_MGMT_CFG80211_DISASSOC:
2676 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2677 break;
2678 case RX_MGMT_CFG80211_RX_AUTH:
2679 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2680 break;
2681 case RX_MGMT_CFG80211_RX_ASSOC:
2682 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2683 break;
2684 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2685 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2686 break;
2687 default:
2688 WARN(1, "unexpected: %d", rma);
b054b747 2689 }
f0706e82
JB		 2690}
2691
9c6bd790 2692static void ieee80211_sta_timer(unsigned long data)
f0706e82 2693{
60f8b39c
JB		 2694 struct ieee80211_sub_if_data *sdata =
2695 (struct ieee80211_sub_if_data *) data;
46900298 2696 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2697 struct ieee80211_local *local = sdata->local;
f0706e82 2698
5bb644a0
JB		 2699 if (local->quiescing) {
2700 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2701 return;
2702 }
2703
64592c8f 2704 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2705}
2706
04ac3c0e 2707static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2708 u8 *bssid, u8 reason)
04ac3c0e
FF		 2709{
2710 struct ieee80211_local *local = sdata->local;
2711 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2712 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2713
37ad3888
JB		 2714 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2715 false, frame_buf);
04ac3c0e 2716 mutex_unlock(&ifmgd->mtx);
37ad3888 2717
04ac3c0e
FF		 2718 /*
2719 * must be outside lock due to cfg80211,
2720 * but that's not a problem.
2721 */
6ae16775 2722 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 2723
2724 mutex_lock(&local->mtx);
2725 ieee80211_recalc_idle(local);
2726 mutex_unlock(&local->mtx);
2727
04ac3c0e
FF		 2728 mutex_lock(&ifmgd->mtx);
2729}
2730
66e67e41
JB		 2731static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2732{
2733 struct ieee80211_local *local = sdata->local;
2734 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2735 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2736
2737 lockdep_assert_held(&ifmgd->mtx);
2738
2739 if (WARN_ON_ONCE(!auth_data))
2740 return -EINVAL;
2741
66e67e41
JB		 2742 auth_data->tries++;
2743
2744 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2745 sdata_info(sdata, "authentication with %pM timed out\n",
2746 auth_data->bss->bssid);
66e67e41
JB		 2747
2748 /*
2749 * Most likely AP is not in the range so remove the
2750 * bss struct for that AP.
2751 */
2752 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2753
2754 return -ETIMEDOUT;
2755 }
2756
a1845fc7
JB		 2757 drv_mgd_prepare_tx(local, sdata);
2758
66e67e41 2759 if (auth_data->bss->proberesp_ies) {
bdcbd8e0
JB		 2760 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2761 auth_data->bss->bssid, auth_data->tries,
2762 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2763
2764 auth_data->expected_transaction = 2;
2765 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2766 auth_data->ie, auth_data->ie_len,
2767 auth_data->bss->bssid,
2768 auth_data->bss->bssid, NULL, 0, 0);
2769 } else {
2770 const u8 *ssidie;
2771
bdcbd8e0
JB		 2772 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2773 auth_data->bss->bssid, auth_data->tries,
2774 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2775
2776 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2777 if (!ssidie)
2778 return -EINVAL;
2779 /*
2780 * Direct probe is sent to broadcast address as some APs
2781 * will not answer to direct packet in unassociated state.
2782 */
2783 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
fe94fe05 2784 NULL, 0, (u32) -1, true, false,
55de908a 2785 auth_data->bss->channel, false);
66e67e41
JB		 2786 }
2787
2788 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2789 run_again(ifmgd, auth_data->timeout);
2790
2791 return 0;
2792}
2793
2794static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2795{
2796 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2797 struct ieee80211_local *local = sdata->local;
2798
2799 lockdep_assert_held(&sdata->u.mgd.mtx);
2800
66e67e41
JB		 2801 assoc_data->tries++;
2802 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2803 sdata_info(sdata, "association with %pM timed out\n",
2804 assoc_data->bss->bssid);
66e67e41
JB		 2805
2806 /*
2807 * Most likely AP is not in the range so remove the
2808 * bss struct for that AP.
2809 */
2810 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2811
2812 return -ETIMEDOUT;
2813 }
2814
bdcbd8e0
JB		 2815 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2816 assoc_data->bss->bssid, assoc_data->tries,
2817 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2818 ieee80211_send_assoc(sdata);
2819
2820 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2821 run_again(&sdata->u.mgd, assoc_data->timeout);
2822
2823 return 0;
2824}
2825
1fa57d01 2826void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2827{
9c6bd790 2828 struct ieee80211_local *local = sdata->local;
1fa57d01 2829 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2830
77fdaa12
JB		 2831 mutex_lock(&ifmgd->mtx);
2832
66e67e41
JB		 2833 if (ifmgd->auth_data &&
2834 time_after(jiffies, ifmgd->auth_data->timeout)) {
2835 if (ifmgd->auth_data->done) {
2836 /*
2837 * ok ... we waited for assoc but userspace didn't,
2838 * so let's just kill the auth data
2839 */
2840 ieee80211_destroy_auth_data(sdata, false);
2841 } else if (ieee80211_probe_auth(sdata)) {
2842 u8 bssid[ETH_ALEN];
2843
2844 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2845
2846 ieee80211_destroy_auth_data(sdata, false);
2847
2848 mutex_unlock(&ifmgd->mtx);
2849 cfg80211_send_auth_timeout(sdata->dev, bssid);
2850 mutex_lock(&ifmgd->mtx);
2851 }
2852 } else if (ifmgd->auth_data)
2853 run_again(ifmgd, ifmgd->auth_data->timeout);
2854
2855 if (ifmgd->assoc_data &&
2856 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2857 if (!ifmgd->assoc_data->have_beacon ||
2858 ieee80211_do_assoc(sdata)) {
2859 u8 bssid[ETH_ALEN];
2860
2861 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2862
2863 ieee80211_destroy_assoc_data(sdata, false);
2864
2865 mutex_unlock(&ifmgd->mtx);
2866 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2867 mutex_lock(&ifmgd->mtx);
2868 }
2869 } else if (ifmgd->assoc_data)
2870 run_again(ifmgd, ifmgd->assoc_data->timeout);
2871
b291ba11
JB		 2872 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2873 IEEE80211_STA_CONNECTION_POLL) &&
2874 ifmgd->associated) {
a43abf29 2875 u8 bssid[ETH_ALEN];
72a8a3ed 2876 int max_tries;
a43abf29 2877
0c1ad2ca 2878 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2879
72a8a3ed 2880 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2881 max_tries = max_nullfunc_tries;
72a8a3ed 2882 else
180205bd 2883 max_tries = max_probe_tries;
72a8a3ed 2884
4e5ff376
FF		 2885 /* ACK received for nullfunc probing frame */
2886 if (!ifmgd->probe_send_count)
2887 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2888 else if (ifmgd->nullfunc_failed) {
2889 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2890 mlme_dbg(sdata,
2891 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2892 bssid, ifmgd->probe_send_count,
2893 max_tries);
04ac3c0e
FF		 2894 ieee80211_mgd_probe_ap_send(sdata);
2895 } else {
bdcbd8e0
JB		 2896 mlme_dbg(sdata,
2897 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2898 bssid);
95acac61
JB		 2899 ieee80211_sta_connection_lost(sdata, bssid,
2900 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2901 }
2902 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2903 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2904 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2905 mlme_dbg(sdata,
2906 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2907 bssid, probe_wait_ms);
95acac61
JB		 2908 ieee80211_sta_connection_lost(sdata, bssid,
2909 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2910 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2911 mlme_dbg(sdata,
2912 "No probe response from AP %pM after %dms, try %d/%i\n",
2913 bssid, probe_wait_ms,
2914 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2915 ieee80211_mgd_probe_ap_send(sdata);
2916 } else {
b291ba11
JB		 2917 /*
2918 * We actually lost the connection ... or did we?
2919 * Let's make sure!
2920 */
b38afa87
BG		 2921 wiphy_debug(local->hw.wiphy,
2922 "%s: No probe response from AP %pM"
2923 " after %dms, disconnecting.\n",
2924 sdata->name,
180205bd 2925 bssid, probe_wait_ms);
04ac3c0e 2926
95acac61
JB		 2927 ieee80211_sta_connection_lost(sdata, bssid,
2928 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2929 }
2930 }
2931
77fdaa12 2932 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2933
2934 mutex_lock(&local->mtx);
2935 ieee80211_recalc_idle(local);
2936 mutex_unlock(&local->mtx);
f0706e82
JB		 2937}
2938
b291ba11
JB		 2939static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2940{
2941 struct ieee80211_sub_if_data *sdata =
2942 (struct ieee80211_sub_if_data *) data;
2943 struct ieee80211_local *local = sdata->local;
2944
2945 if (local->quiescing)
2946 return;
2947
1e4dcd01
JO		 2948 ieee80211_queue_work(&sdata->local->hw,
2949 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2950}
2951
2952static void ieee80211_sta_conn_mon_timer(unsigned long data)
2953{
2954 struct ieee80211_sub_if_data *sdata =
2955 (struct ieee80211_sub_if_data *) data;
2956 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2957 struct ieee80211_local *local = sdata->local;
2958
2959 if (local->quiescing)
2960 return;
2961
42935eca 2962 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2963}
2964
2965static void ieee80211_sta_monitor_work(struct work_struct *work)
2966{
2967 struct ieee80211_sub_if_data *sdata =
2968 container_of(work, struct ieee80211_sub_if_data,
2969 u.mgd.monitor_work);
2970
2971 ieee80211_mgd_probe_ap(sdata, false);
2972}
2973
9c6bd790
JB		 2974static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2975{
494f1fe5
EP		 2976 u32 flags;
2977
ad935687 2978 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2979 __ieee80211_stop_poll(sdata);
ad935687 2980
b291ba11 2981 /* let's probe the connection once */
494f1fe5
EP		 2982 flags = sdata->local->hw.flags;
2983 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2984 ieee80211_queue_work(&sdata->local->hw,
2985 &sdata->u.mgd.monitor_work);
b291ba11 2986 /* and do all the other regular work too */
64592c8f 2987 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2988 }
9c6bd790 2989}
f0706e82 2990
5bb644a0
JB		 2991#ifdef CONFIG_PM
2992void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2993{
2994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2995
2996 /*
2997 * we need to use atomic bitops for the running bits
2998 * only because both timers might fire at the same
2999 * time -- the code here is properly synchronised.
3000 */
3001
d1f5b7a3
JB		 3002 cancel_work_sync(&ifmgd->request_smps_work);
3003
0ecfe806 3004 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3005 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3006 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3007 if (del_timer_sync(&ifmgd->timer))
3008 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3009
3010 cancel_work_sync(&ifmgd->chswitch_work);
3011 if (del_timer_sync(&ifmgd->chswitch_timer))
3012 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3013
b291ba11
JB		 3014 /* these will just be re-established on connection */
3015 del_timer_sync(&ifmgd->conn_mon_timer);
3016 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3017}
3018
3019void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3020{
3021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3022
676b58c2
RM		 3023 if (!ifmgd->associated)
3024 return;
3025
95acac61
JB		 3026 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3027 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3028 mutex_lock(&ifmgd->mtx);
3029 if (ifmgd->associated) {
bdcbd8e0
JB		 3030 mlme_dbg(sdata,
3031 "driver requested disconnect after resume\n");
95acac61
JB		 3032 ieee80211_sta_connection_lost(sdata,
3033 ifmgd->associated->bssid,
3034 WLAN_REASON_UNSPECIFIED);
3035 mutex_unlock(&ifmgd->mtx);
3036 return;
3037 }
3038 mutex_unlock(&ifmgd->mtx);
3039 }
3040
5bb644a0
JB		 3041 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3042 add_timer(&ifmgd->timer);
3043 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3044 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3045 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3046
3047 mutex_lock(&sdata->local->mtx);
46090979 3048 ieee80211_restart_sta_timer(sdata);
925e64c3 3049 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3050}
3051#endif
3052
9c6bd790
JB		 3053/* interface setup */
3054void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3055{
46900298 3056 struct ieee80211_if_managed *ifmgd;
988c0f72 3057
46900298 3058 ifmgd = &sdata->u.mgd;
b291ba11 3059 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3060 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3061 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3062 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3063 INIT_WORK(&ifmgd->csa_connection_drop_work,
3064 ieee80211_csa_connection_drop_work);
d1f5b7a3 3065 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3066 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3067 (unsigned long) sdata);
b291ba11
JB		 3068 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3069 (unsigned long) sdata);
3070 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3071 (unsigned long) sdata);
46900298 3072 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3073 (unsigned long) sdata);
9c6bd790 3074
ab1faead 3075 ifmgd->flags = 0;
1478acb3 3076 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3077 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3078 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3079
77fdaa12 3080 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3081
3082 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3083 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3084 else
3085 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3086}
3087
77fdaa12
JB		 3088/* scan finished notification */
3089void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3090{
31ee67a1 3091 struct ieee80211_sub_if_data *sdata;
60f8b39c 3092
77fdaa12
JB		 3093 /* Restart STA timers */
3094 rcu_read_lock();
3095 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3096 ieee80211_restart_sta_timer(sdata);
3097 rcu_read_unlock();
3098}
60f8b39c 3099
77fdaa12
JB		 3100int ieee80211_max_network_latency(struct notifier_block *nb,
3101 unsigned long data, void *dummy)
3102{
3103 s32 latency_usec = (s32) data;
3104 struct ieee80211_local *local =
3105 container_of(nb, struct ieee80211_local,
3106 network_latency_notifier);
1fa6f4af 3107
77fdaa12
JB		 3108 mutex_lock(&local->iflist_mtx);
3109 ieee80211_recalc_ps(local, latency_usec);
3110 mutex_unlock(&local->iflist_mtx);
dfe67012 3111
77fdaa12 3112 return 0;
9c6bd790
JB		 3113}
3114
b17166a7
JB		 3115static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3116 struct cfg80211_bss *cbss)
a1cf775d
JB		 3117{
3118 struct ieee80211_local *local = sdata->local;
3119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39
JB		 3120 int ht_cfreq;
3121 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3122 const u8 *ht_oper_ie;
3123 const struct ieee80211_ht_operation *ht_oper = NULL;
3124 struct ieee80211_supported_band *sband;
a1cf775d 3125
24398e39
JB		 3126 sband = local->hw.wiphy->bands[cbss->channel->band];
3127
3128 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3129
3130 if (sband->ht_cap.ht_supported) {
3131 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3132 cbss->information_elements,
3133 cbss->len_information_elements);
3134 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3135 ht_oper = (void *)(ht_oper_ie + 2);
3136 }
3137
3138 if (ht_oper) {
3139 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3140 cbss->channel->band);
3141 /* check that channel matches the right operating channel */
3142 if (cbss->channel->center_freq != ht_cfreq) {
3143 /*
3144 * It's possible that some APs are confused here;
3145 * Netgear WNDR3700 sometimes reports 4 higher than
3146 * the actual channel in association responses, but
3147 * since we look at probe response/beacon data here
3148 * it should be OK.
3149 */
bdcbd8e0
JB		 3150 sdata_info(sdata,
3151 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3152 cbss->channel->center_freq,
3153 ht_cfreq, ht_oper->primary_chan,
3154 cbss->channel->band);
24398e39
JB		 3155 ht_oper = NULL;
3156 }
3157 }
3158
3159 if (ht_oper) {
04ecd257
JB		 3160 const u8 *ht_cap_ie;
3161 const struct ieee80211_ht_cap *ht_cap;
3162 u8 chains = 1;
3163
24398e39
JB		 3164 channel_type = NL80211_CHAN_HT20;
3165
3166 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3167 switch (ht_oper->ht_param &
3168 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3169 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3170 channel_type = NL80211_CHAN_HT40PLUS;
3171 break;
3172 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3173 channel_type = NL80211_CHAN_HT40MINUS;
3174 break;
3175 }
3176 }
04ecd257
JB		 3177
3178 ht_cap_ie = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY,
3179 cbss->information_elements,
3180 cbss->len_information_elements);
3181 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3182 ht_cap = (void *)(ht_cap_ie + 2);
3183 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3184 }
3185 sdata->needed_rx_chains = min(chains, local->rx_chains);
3186 } else {
3187 sdata->needed_rx_chains = 1;
24398e39
JB		 3188 }
3189
04ecd257
JB		 3190 /* will change later if needed */
3191 sdata->smps_mode = IEEE80211_SMPS_OFF;
3192
55de908a
JB		 3193 ieee80211_vif_release_channel(sdata);
3194 return ieee80211_vif_use_channel(sdata, cbss->channel, channel_type,
3195 IEEE80211_CHANCTX_SHARED);
b17166a7
JB		 3196}
3197
3198static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3199 struct cfg80211_bss *cbss, bool assoc)
3200{
3201 struct ieee80211_local *local = sdata->local;
3202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3203 struct ieee80211_bss *bss = (void *)cbss->priv;
3204 struct sta_info *new_sta = NULL;
3205 bool have_sta = false;
3206 int err;
3207
3208 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3209 return -EINVAL;
3210
3211 if (assoc) {
3212 rcu_read_lock();
3213 have_sta = sta_info_get(sdata, cbss->bssid);
3214 rcu_read_unlock();
3215 }
3216
3217 if (!have_sta) {
3218 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3219 if (!new_sta)
3220 return -ENOMEM;
3221 }
3222
3223 mutex_lock(&local->mtx);
3224 ieee80211_recalc_idle(sdata->local);
3225 mutex_unlock(&local->mtx);
3226
13e0c8e3 3227 if (new_sta) {
5d6a1b06
JB		 3228 u32 rates = 0, basic_rates = 0;
3229 bool have_higher_than_11mbit;
3230 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3231 struct ieee80211_supported_band *sband;
3232
3233 sband = local->hw.wiphy->bands[cbss->channel->band];
3234
3235 err = ieee80211_prep_channel(sdata, cbss);
3236 if (err) {
3237 sta_info_free(local, new_sta);
3238 return err;
3239 }
5d6a1b06 3240
5d6a1b06
JB		 3241 ieee80211_get_rates(sband, bss->supp_rates,
3242 bss->supp_rates_len,
3243 &rates, &basic_rates,
3244 &have_higher_than_11mbit,
3245 &min_rate, &min_rate_index);
3246
3247 /*
3248 * This used to be a workaround for basic rates missing
3249 * in the association response frame. Now that we no
3250 * longer use the basic rates from there, it probably
3251 * doesn't happen any more, but keep the workaround so
3252 * in case some *other* APs are buggy in different ways
3253 * we can connect -- with a warning.
3254 */
3255 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3256 sdata_info(sdata,
3257 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3258 basic_rates = BIT(min_rate_index);
3259 }
3260
13e0c8e3 3261 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3262 sdata->vif.bss_conf.basic_rates = basic_rates;
3263
3264 /* cf. IEEE 802.11 9.2.12 */
55de908a 3265 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3266 have_higher_than_11mbit)
3267 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3268 else
3269 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3270
3271 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3272
8c358bcd
JB		 3273 /* set timing information */
3274 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3275 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3276 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3277
3278 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3279 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3280 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3281 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3282
3283 if (assoc)
13e0c8e3 3284 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3285
13e0c8e3
JB		 3286 err = sta_info_insert(new_sta);
3287 new_sta = NULL;
a1cf775d 3288 if (err) {
bdcbd8e0
JB		 3289 sdata_info(sdata,
3290 "failed to insert STA entry for the AP (error %d)\n",
3291 err);
a1cf775d
JB		 3292 return err;
3293 }
3294 } else
b203ca39 3295 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3296
3297 return 0;
3298}
3299
77fdaa12
JB		 3300/* config hooks */
3301int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3302 struct cfg80211_auth_request *req)
9c6bd790 3303{
66e67e41
JB		 3304 struct ieee80211_local *local = sdata->local;
3305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3306 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3307 u16 auth_alg;
66e67e41
JB		 3308 int err;
3309
3310 /* prepare auth data structure */
9c6bd790 3311
77fdaa12
JB		 3312 switch (req->auth_type) {
3313 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3314 auth_alg = WLAN_AUTH_OPEN;
3315 break;
3316 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3317 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3318 return -EOPNOTSUPP;
77fdaa12
JB		 3319 auth_alg = WLAN_AUTH_SHARED_KEY;
3320 break;
3321 case NL80211_AUTHTYPE_FT:
3322 auth_alg = WLAN_AUTH_FT;
3323 break;
3324 case NL80211_AUTHTYPE_NETWORK_EAP:
3325 auth_alg = WLAN_AUTH_LEAP;
3326 break;
3327 default:
3328 return -EOPNOTSUPP;
60f8b39c 3329 }
77fdaa12 3330
66e67e41
JB		 3331 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3332 if (!auth_data)
9c6bd790 3333 return -ENOMEM;
77fdaa12 3334
66e67e41 3335 auth_data->bss = req->bss;
77fdaa12
JB		 3336
3337 if (req->ie && req->ie_len) {
66e67e41
JB		 3338 memcpy(auth_data->ie, req->ie, req->ie_len);
3339 auth_data->ie_len = req->ie_len;
9c6bd790 3340 }
77fdaa12 3341
fffd0934 3342 if (req->key && req->key_len) {
66e67e41
JB		 3343 auth_data->key_len = req->key_len;
3344 auth_data->key_idx = req->key_idx;
3345 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3346 }
3347
66e67e41 3348 auth_data->algorithm = auth_alg;
60f8b39c 3349
66e67e41 3350 /* try to authenticate/probe */
2a33bee2 3351
66e67e41 3352 mutex_lock(&ifmgd->mtx);
2a33bee2 3353
66e67e41
JB		 3354 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3355 ifmgd->assoc_data) {
3356 err = -EBUSY;
3357 goto err_free;
2a33bee2
GE		 3358 }
3359
66e67e41
JB		 3360 if (ifmgd->auth_data)
3361 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3362
66e67e41
JB		 3363 /* prep auth_data so we don't go into idle on disassoc */
3364 ifmgd->auth_data = auth_data;
af6b6374 3365
66e67e41 3366 if (ifmgd->associated)
37ad3888 3367 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3368
bdcbd8e0 3369 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3370
a1cf775d
JB		 3371 err = ieee80211_prep_connection(sdata, req->bss, false);
3372 if (err)
66e67e41 3373 goto err_clear;
af6b6374 3374
66e67e41
JB		 3375 err = ieee80211_probe_auth(sdata);
3376 if (err) {
66e67e41
JB		 3377 sta_info_destroy_addr(sdata, req->bss->bssid);
3378 goto err_clear;
3379 }
3380
3381 /* hold our own reference */
3382 cfg80211_ref_bss(auth_data->bss);
3383 err = 0;
3384 goto out_unlock;
3385
3386 err_clear:
3d2abdfd
EP		 3387 memset(ifmgd->bssid, 0, ETH_ALEN);
3388 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3389 ifmgd->auth_data = NULL;
3390 err_free:
3391 kfree(auth_data);
3392 out_unlock:
3393 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3394
66e67e41 3395 return err;
af6b6374
JB		 3396}
3397
77fdaa12
JB		 3398int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3399 struct cfg80211_assoc_request *req)
f0706e82 3400{
66e67e41 3401 struct ieee80211_local *local = sdata->local;
77fdaa12 3402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3403 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3404 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3405 struct ieee80211_supported_band *sband;
9dde6423 3406 const u8 *ssidie, *ht_ie;
2a33bee2 3407 int i, err;
f0706e82 3408
66e67e41
JB		 3409 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3410 if (!ssidie)
3411 return -EINVAL;
3412
3413 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3414 if (!assoc_data)
3415 return -ENOMEM;
3416
77fdaa12 3417 mutex_lock(&ifmgd->mtx);
9c87ba67 3418
66e67e41 3419 if (ifmgd->associated)
37ad3888 3420 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3421
3422 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3423 err = -EBUSY;
3424 goto err_free;
af6b6374 3425 }
77fdaa12 3426
66e67e41
JB		 3427 if (ifmgd->assoc_data) {
3428 err = -EBUSY;
3429 goto err_free;
3430 }
77fdaa12 3431
66e67e41
JB		 3432 if (ifmgd->auth_data) {
3433 bool match;
3434
3435 /* keep sta info, bssid if matching */
b203ca39 3436 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3437 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3438 }
3439
66e67e41 3440 /* prepare assoc data */
19c3b830
JB		 3441
3442 /*
3443 * keep only the 40 MHz disable bit set as it might have
3444 * been set during authentication already, all other bits
3445 * should be reset for a new connection
3446 */
3447 ifmgd->flags &= IEEE80211_STA_DISABLE_40MHZ;
77fdaa12 3448
d8ec4433
JO		 3449 ifmgd->beacon_crc_valid = false;
3450
de5036aa
JB		 3451 /*
3452 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3453 * We still associate in non-HT mode (11a/b/g) if any one of these
3454 * ciphers is configured as pairwise.
3455 * We can set this to true for non-11n hardware, that'll be checked
3456 * separately along with the peer capabilities.
3457 */
1c4cb928 3458 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3459 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3460 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3461 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3462 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba 3463 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3464 netdev_info(sdata->dev,
d545daba 3465 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3466 }
3467 }
77fdaa12 3468
d545daba 3469 if (req->flags & ASSOC_REQ_DISABLE_HT) {
ef96a842 3470 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba
MP		 3471 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3472 }
ef96a842 3473
4e74bfdb
JB		 3474 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3475 sband = local->hw.wiphy->bands[req->bss->channel->band];
3476 if (!sband->ht_cap.ht_supported ||
1c4cb928 3477 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3478 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1b49de26
JB		 3479 if (!bss->wmm_used)
3480 netdev_info(sdata->dev,
3481 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3482 }
4e74bfdb 3483
d545daba
MP		 3484 /* disable VHT if we don't support it or the AP doesn't use WMM */
3485 if (!sband->vht_cap.vht_supported ||
3486 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3487 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3488 if (!bss->wmm_used)
3489 netdev_info(sdata->dev,
3490 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3491 }
3492
ef96a842
BG		 3493 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3494 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3495 sizeof(ifmgd->ht_capa_mask));
3496
77fdaa12 3497 if (req->ie && req->ie_len) {
66e67e41
JB		 3498 memcpy(assoc_data->ie, req->ie, req->ie_len);
3499 assoc_data->ie_len = req->ie_len;
3500 }
f679f65d 3501
66e67e41 3502 assoc_data->bss = req->bss;
f679f65d 3503
af6b6374
JB		 3504 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3505 if (ifmgd->powersave)
04ecd257 3506 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3507 else
04ecd257 3508 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3509 } else
04ecd257 3510 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3511
66e67e41 3512 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3513 assoc_data->wmm = bss->wmm_used &&
3514 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3515 assoc_data->supp_rates = bss->supp_rates;
3516 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3517
3518 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3519 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3520 assoc_data->ap_ht_param =
3521 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3522 else
3523 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3524
ab13315a
KV		 3525 if (bss->wmm_used && bss->uapsd_supported &&
3526 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3527 assoc_data->uapsd = true;
ab13315a
KV		 3528 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3529 } else {
76f0303d 3530 assoc_data->uapsd = false;
ab13315a
KV		 3531 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3532 }
3533
66e67e41
JB		 3534 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3535 assoc_data->ssid_len = ssidie[1];
63f170e0 3536
77fdaa12 3537 if (req->prev_bssid)
66e67e41 3538 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3539
3540 if (req->use_mfp) {
3541 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3542 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3543 } else {
3544 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3545 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3546 }
3547
3548 if (req->crypto.control_port)
3549 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3550 else
3551 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3552
a621fa4d
JB		 3553 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3554 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3555
66e67e41
JB		 3556 /* kick off associate process */
3557
3558 ifmgd->assoc_data = assoc_data;
3559
a1cf775d
JB		 3560 err = ieee80211_prep_connection(sdata, req->bss, true);
3561 if (err)
3562 goto err_clear;
66e67e41
JB		 3563
3564 if (!bss->dtim_period &&
3565 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3566 /*
3567 * Wait up to one beacon interval ...
3568 * should this be more if we miss one?
3569 */
bdcbd8e0
JB		 3570 sdata_info(sdata, "waiting for beacon from %pM\n",
3571 ifmgd->bssid);
3f9768a5 3572 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3573 } else {
3574 assoc_data->have_beacon = true;
3575 assoc_data->sent_assoc = false;
3576 assoc_data->timeout = jiffies;
3577 }
3578 run_again(ifmgd, assoc_data->timeout);
3579
fcff4f10
PS		 3580 if (bss->corrupt_data) {
3581 char *corrupt_type = "data";
3582 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3583 if (bss->corrupt_data &
3584 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3585 corrupt_type = "beacon and probe response";
3586 else
3587 corrupt_type = "beacon";
3588 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3589 corrupt_type = "probe response";
bdcbd8e0
JB		 3590 sdata_info(sdata, "associating with AP with corrupt %s\n",
3591 corrupt_type);
fcff4f10
PS		 3592 }
3593
66e67e41
JB		 3594 err = 0;
3595 goto out;
3596 err_clear:
3d2abdfd
EP		 3597 memset(ifmgd->bssid, 0, ETH_ALEN);
3598 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3599 ifmgd->assoc_data = NULL;
3600 err_free:
3601 kfree(assoc_data);
3602 out:
3603 mutex_unlock(&ifmgd->mtx);
3604
3605 return err;
f0706e82
JB		 3606}
3607
77fdaa12 3608int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3609 struct cfg80211_deauth_request *req)
f0706e82 3610{
46900298 3611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3612 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82 3613
77fdaa12
JB		 3614 mutex_lock(&ifmgd->mtx);
3615
37ad3888 3616 if (ifmgd->auth_data) {
66e67e41 3617 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3618 mutex_unlock(&ifmgd->mtx);
66e67e41 3619 return 0;
af6b6374 3620 }
77fdaa12 3621
bdcbd8e0
JB		 3622 sdata_info(sdata,
3623 "deauthenticating from %pM by local choice (reason=%d)\n",
3624 req->bssid, req->reason_code);
0ff71613 3625
37ad3888 3626 if (ifmgd->associated &&
8c7d857c 3627 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
37ad3888 3628 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3629 req->reason_code, true, frame_buf);
8c7d857c
EG		 3630 } else {
3631 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 3632 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3633 IEEE80211_STYPE_DEAUTH,
3634 req->reason_code, true,
3635 frame_buf);
8c7d857c
EG		 3636 }
3637
37ad3888
JB		 3638 mutex_unlock(&ifmgd->mtx);
3639
6ae16775
AQ		 3640 __cfg80211_send_deauth(sdata->dev, frame_buf,
3641 IEEE80211_DEAUTH_FRAME_LEN);
f0706e82 3642
7da7cc1d 3643 mutex_lock(&sdata->local->mtx);
bc83b681 3644 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3645 mutex_unlock(&sdata->local->mtx);
bc83b681 3646
f0706e82
JB		 3647 return 0;
3648}
84363e6e 3649
77fdaa12 3650int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3651 struct cfg80211_disassoc_request *req)
9c6bd790 3652{
77fdaa12 3653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3654 u8 bssid[ETH_ALEN];
6ae16775 3655 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 3656
77fdaa12 3657 mutex_lock(&ifmgd->mtx);
10f644a4 3658
8d8b261a
JB		 3659 /*
3660 * cfg80211 should catch this ... but it's racy since
3661 * we can receive a disassoc frame, process it, hand it
3662 * to cfg80211 while that's in a locked section already
3663 * trying to tell us that the user wants to disconnect.
3664 */
0c1ad2ca 3665 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3666 mutex_unlock(&ifmgd->mtx);
3667 return -ENOLINK;
3668 }
3669
bdcbd8e0
JB		 3670 sdata_info(sdata,
3671 "disassociating from %pM by local choice (reason=%d)\n",
3672 req->bss->bssid, req->reason_code);
0ff71613 3673
e69e95db 3674 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3675 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3676 req->reason_code, !req->local_state_change,
3677 frame_buf);
77fdaa12 3678 mutex_unlock(&ifmgd->mtx);
10f644a4 3679
6ae16775
AQ		 3680 __cfg80211_send_disassoc(sdata->dev, frame_buf,
3681 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 3682
7da7cc1d 3683 mutex_lock(&sdata->local->mtx);
bc83b681 3684 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3685 mutex_unlock(&sdata->local->mtx);
bc83b681 3686
10f644a4
JB		 3687 return 0;
3688}
026331c4 3689
afa762f6 3690void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3691{
3692 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3693
3694 mutex_lock(&ifmgd->mtx);
3695 if (ifmgd->assoc_data)
3696 ieee80211_destroy_assoc_data(sdata, false);
3697 if (ifmgd->auth_data)
3698 ieee80211_destroy_auth_data(sdata, false);
3699 del_timer_sync(&ifmgd->timer);
3700 mutex_unlock(&ifmgd->mtx);
3701}
3702
a97c13c3
JO		 3703void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3704 enum nl80211_cqm_rssi_threshold_event rssi_event,
3705 gfp_t gfp)
3706{
3707 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3708
b5878a2d
JB		 3709 trace_api_cqm_rssi_notify(sdata, rssi_event);
3710
a97c13c3
JO		 3711 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3712}
3713EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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