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mac80211: check size of channel switch IE when parsing
[mirror_ubuntu-bionic-kernel.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
5fef7dbc
JB		 91#define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
7eeff74c
JB		 149 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
150 return;
151
b291ba11 152 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 153 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 154}
155
be099e82
LR		 156void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
157{
0c699c3a
LR		 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159
8628172f
SG		 160 if (unlikely(!sdata->u.mgd.associated))
161 return;
162
be099e82
LR		 163 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
164 return;
165
166 mod_timer(&sdata->u.mgd.conn_mon_timer,
167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 168
169 ifmgd->probe_send_count = 0;
be099e82
LR		 170}
171
5484e237 172static int ecw2cw(int ecw)
60f8b39c 173{
5484e237 174 return (1 << ecw) - 1;
60f8b39c
JB		 175}
176
24398e39
JB		 177static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
178 struct ieee80211_ht_operation *ht_oper,
179 const u8 *bssid, bool reconfig)
d5522e03
JB		 180{
181 struct ieee80211_local *local = sdata->local;
182 struct ieee80211_supported_band *sband;
d5522e03
JB		 183 struct sta_info *sta;
184 u32 changed = 0;
9ed6bcce 185 u16 ht_opmode;
64f68e5d 186 bool disable_40 = false;
d5522e03 187
568d6e28 188 sband = local->hw.wiphy->bands[local->oper_channel->band];
d5522e03 189
64f68e5d
JB		 190 switch (sdata->vif.bss_conf.channel_type) {
191 case NL80211_CHAN_HT40PLUS:
568d6e28 192 if (local->oper_channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d
JB		 193 disable_40 = true;
194 break;
195 case NL80211_CHAN_HT40MINUS:
568d6e28 196 if (local->oper_channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d
JB		 197 disable_40 = true;
198 break;
199 default:
200 break;
201 }
d5522e03 202
24398e39
JB		 203 /* This can change during the lifetime of the BSS */
204 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 205 disable_40 = true;
206
207 mutex_lock(&local->sta_mtx);
208 sta = sta_info_get(sdata, bssid);
d5522e03 209
64f68e5d
JB		 210 WARN_ON_ONCE(!sta);
211
212 if (sta && !sta->supports_40mhz)
213 disable_40 = true;
214
215 if (sta && (!reconfig ||
91a0099c 216 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 217 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 218
64f68e5d
JB		 219 if (disable_40)
220 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
221 else
222 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 223
64f68e5d 224 rate_control_rate_update(local, sband, sta,
8f727ef3 225 IEEE80211_RC_BW_CHANGED);
0aaffa9b 226 }
64f68e5d 227 mutex_unlock(&local->sta_mtx);
d5522e03 228
074d46d1 229 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 230
231 /* if bss configuration changed store the new one */
24398e39 232 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 233 changed |= BSS_CHANGED_HT;
9ed6bcce 234 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 235 }
236
237 return changed;
238}
239
9c6bd790
JB		 240/* frame sending functions */
241
66e67e41
JB		 242static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
243 struct ieee80211_supported_band *sband,
244 u32 *rates)
245{
246 int i, j, count;
247 *rates = 0;
248 count = 0;
249 for (i = 0; i < supp_rates_len; i++) {
250 int rate = (supp_rates[i] & 0x7F) * 5;
251
252 for (j = 0; j < sband->n_bitrates; j++)
253 if (sband->bitrates[j].bitrate == rate) {
254 *rates |= BIT(j);
255 count++;
256 break;
257 }
258 }
259
260 return count;
261}
262
263static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 264 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 265 struct ieee80211_supported_band *sband,
266 struct ieee80211_channel *channel,
267 enum ieee80211_smps_mode smps)
268{
66e67e41
JB		 269 u8 *pos;
270 u32 flags = channel->flags;
271 u16 cap;
272 struct ieee80211_sta_ht_cap ht_cap;
273
274 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
275
66e67e41
JB		 276 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
277 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
278
66e67e41
JB		 279 /* determine capability flags */
280 cap = ht_cap.cap;
281
9dde6423 282 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 283 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
284 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
285 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
286 cap &= ~IEEE80211_HT_CAP_SGI_40;
287 }
288 break;
289 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
290 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
291 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
292 cap &= ~IEEE80211_HT_CAP_SGI_40;
293 }
294 break;
295 }
296
24398e39
JB		 297 /*
298 * If 40 MHz was disabled associate as though we weren't
299 * capable of 40 MHz -- some broken APs will never fall
300 * back to trying to transmit in 20 MHz.
301 */
302 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
303 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
304 cap &= ~IEEE80211_HT_CAP_SGI_40;
305 }
306
66e67e41
JB		 307 /* set SM PS mode properly */
308 cap &= ~IEEE80211_HT_CAP_SM_PS;
309 switch (smps) {
310 case IEEE80211_SMPS_AUTOMATIC:
311 case IEEE80211_SMPS_NUM_MODES:
312 WARN_ON(1);
313 case IEEE80211_SMPS_OFF:
314 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
315 IEEE80211_HT_CAP_SM_PS_SHIFT;
316 break;
317 case IEEE80211_SMPS_STATIC:
318 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
319 IEEE80211_HT_CAP_SM_PS_SHIFT;
320 break;
321 case IEEE80211_SMPS_DYNAMIC:
322 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
323 IEEE80211_HT_CAP_SM_PS_SHIFT;
324 break;
325 }
326
327 /* reserve and fill IE */
328 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
329 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
330}
331
d545daba
MP		 332static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
333 struct sk_buff *skb,
334 struct ieee80211_supported_band *sband)
335{
336 u8 *pos;
337 u32 cap;
338 struct ieee80211_sta_vht_cap vht_cap;
339
340 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
341
342 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
343
344 /* determine capability flags */
345 cap = vht_cap.cap;
346
347 /* reserve and fill IE */
348 pos = skb_put(skb, sizeof(struct ieee80211_vht_capabilities) + 2);
349 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
350}
351
66e67e41
JB		 352static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
353{
354 struct ieee80211_local *local = sdata->local;
355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
356 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
357 struct sk_buff *skb;
358 struct ieee80211_mgmt *mgmt;
359 u8 *pos, qos_info;
360 size_t offset = 0, noffset;
361 int i, count, rates_len, supp_rates_len;
362 u16 capab;
363 struct ieee80211_supported_band *sband;
364 u32 rates = 0;
66e67e41
JB		 365
366 lockdep_assert_held(&ifmgd->mtx);
367
368 sband = local->hw.wiphy->bands[local->oper_channel->band];
369
370 if (assoc_data->supp_rates_len) {
371 /*
372 * Get all rates supported by the device and the AP as
373 * some APs don't like getting a superset of their rates
374 * in the association request (e.g. D-Link DAP 1353 in
375 * b-only mode)...
376 */
377 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
378 assoc_data->supp_rates_len,
379 sband, &rates);
380 } else {
381 /*
382 * In case AP not provide any supported rates information
383 * before association, we send information element(s) with
384 * all rates that we support.
385 */
386 rates = ~0;
387 rates_len = sband->n_bitrates;
388 }
389
390 skb = alloc_skb(local->hw.extra_tx_headroom +
391 sizeof(*mgmt) + /* bit too much but doesn't matter */
392 2 + assoc_data->ssid_len + /* SSID */
393 4 + rates_len + /* (extended) rates */
394 4 + /* power capability */
395 2 + 2 * sband->n_channels + /* supported channels */
396 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d545daba 397 2 + sizeof(struct ieee80211_vht_capabilities) + /* VHT */
66e67e41
JB		 398 assoc_data->ie_len + /* extra IEs */
399 9, /* WMM */
400 GFP_KERNEL);
401 if (!skb)
402 return;
403
404 skb_reserve(skb, local->hw.extra_tx_headroom);
405
406 capab = WLAN_CAPABILITY_ESS;
407
408 if (sband->band == IEEE80211_BAND_2GHZ) {
409 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
410 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
411 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
412 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
413 }
414
415 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
416 capab |= WLAN_CAPABILITY_PRIVACY;
417
418 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
419 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
420 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
421
422 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
423 memset(mgmt, 0, 24);
424 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
425 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
426 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
427
428 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
429 skb_put(skb, 10);
430 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
431 IEEE80211_STYPE_REASSOC_REQ);
432 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
433 mgmt->u.reassoc_req.listen_interval =
434 cpu_to_le16(local->hw.conf.listen_interval);
435 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
436 ETH_ALEN);
437 } else {
438 skb_put(skb, 4);
439 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
440 IEEE80211_STYPE_ASSOC_REQ);
441 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
442 mgmt->u.assoc_req.listen_interval =
443 cpu_to_le16(local->hw.conf.listen_interval);
444 }
445
446 /* SSID */
447 pos = skb_put(skb, 2 + assoc_data->ssid_len);
448 *pos++ = WLAN_EID_SSID;
449 *pos++ = assoc_data->ssid_len;
450 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
451
452 /* add all rates which were marked to be used above */
453 supp_rates_len = rates_len;
454 if (supp_rates_len > 8)
455 supp_rates_len = 8;
456
457 pos = skb_put(skb, supp_rates_len + 2);
458 *pos++ = WLAN_EID_SUPP_RATES;
459 *pos++ = supp_rates_len;
460
461 count = 0;
462 for (i = 0; i < sband->n_bitrates; i++) {
463 if (BIT(i) & rates) {
464 int rate = sband->bitrates[i].bitrate;
465 *pos++ = (u8) (rate / 5);
466 if (++count == 8)
467 break;
468 }
469 }
470
471 if (rates_len > count) {
472 pos = skb_put(skb, rates_len - count + 2);
473 *pos++ = WLAN_EID_EXT_SUPP_RATES;
474 *pos++ = rates_len - count;
475
476 for (i++; i < sband->n_bitrates; i++) {
477 if (BIT(i) & rates) {
478 int rate = sband->bitrates[i].bitrate;
479 *pos++ = (u8) (rate / 5);
480 }
481 }
482 }
483
484 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
485 /* 1. power capabilities */
486 pos = skb_put(skb, 4);
487 *pos++ = WLAN_EID_PWR_CAPABILITY;
488 *pos++ = 2;
489 *pos++ = 0; /* min tx power */
490 *pos++ = local->oper_channel->max_power; /* max tx power */
491
492 /* 2. supported channels */
493 /* TODO: get this in reg domain format */
494 pos = skb_put(skb, 2 * sband->n_channels + 2);
495 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
496 *pos++ = 2 * sband->n_channels;
497 for (i = 0; i < sband->n_channels; i++) {
498 *pos++ = ieee80211_frequency_to_channel(
499 sband->channels[i].center_freq);
500 *pos++ = 1; /* one channel in the subband*/
501 }
502 }
503
504 /* if present, add any custom IEs that go before HT */
505 if (assoc_data->ie_len && assoc_data->ie) {
506 static const u8 before_ht[] = {
507 WLAN_EID_SSID,
508 WLAN_EID_SUPP_RATES,
509 WLAN_EID_EXT_SUPP_RATES,
510 WLAN_EID_PWR_CAPABILITY,
511 WLAN_EID_SUPPORTED_CHANNELS,
512 WLAN_EID_RSN,
513 WLAN_EID_QOS_CAPA,
514 WLAN_EID_RRM_ENABLED_CAPABILITIES,
515 WLAN_EID_MOBILITY_DOMAIN,
516 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
517 };
518 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
519 before_ht, ARRAY_SIZE(before_ht),
520 offset);
521 pos = skb_put(skb, noffset - offset);
522 memcpy(pos, assoc_data->ie + offset, noffset - offset);
523 offset = noffset;
524 }
525
4e74bfdb 526 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
9dde6423 527 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
66e67e41
JB		 528 sband, local->oper_channel, ifmgd->ap_smps);
529
d545daba
MP		 530 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
531 ieee80211_add_vht_ie(sdata, skb, sband);
532
66e67e41
JB		 533 /* if present, add any custom non-vendor IEs that go after HT */
534 if (assoc_data->ie_len && assoc_data->ie) {
535 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
536 assoc_data->ie_len,
537 offset);
538 pos = skb_put(skb, noffset - offset);
539 memcpy(pos, assoc_data->ie + offset, noffset - offset);
540 offset = noffset;
541 }
542
76f0303d
JB		 543 if (assoc_data->wmm) {
544 if (assoc_data->uapsd) {
dc41e4d4
EP		 545 qos_info = ifmgd->uapsd_queues;
546 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 547 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
548 } else {
549 qos_info = 0;
550 }
551
552 pos = skb_put(skb, 9);
553 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
554 *pos++ = 7; /* len */
555 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
556 *pos++ = 0x50;
557 *pos++ = 0xf2;
558 *pos++ = 2; /* WME */
559 *pos++ = 0; /* WME info */
560 *pos++ = 1; /* WME ver */
561 *pos++ = qos_info;
562 }
563
564 /* add any remaining custom (i.e. vendor specific here) IEs */
565 if (assoc_data->ie_len && assoc_data->ie) {
566 noffset = assoc_data->ie_len;
567 pos = skb_put(skb, noffset - offset);
568 memcpy(pos, assoc_data->ie + offset, noffset - offset);
569 }
570
a1845fc7
JB		 571 drv_mgd_prepare_tx(local, sdata);
572
66e67e41
JB		 573 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
574 ieee80211_tx_skb(sdata, skb);
575}
576
ef422bc0 577static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 578 const u8 *bssid, u16 stype,
5fef7dbc
JB		 579 u16 reason, bool send_frame,
580 u8 *frame_buf)
9ac19a90
JB		 581{
582 struct ieee80211_local *local = sdata->local;
46900298 583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 584 struct sk_buff *skb;
5fef7dbc 585 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 586
5fef7dbc
JB		 587 /* build frame */
588 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
589 mgmt->duration = 0; /* initialize only */
590 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 591 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 592 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 593 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 594 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 595 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
596
5fef7dbc
JB		 597 if (send_frame) {
598 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
599 DEAUTH_DISASSOC_LEN);
600 if (!skb)
601 return;
d5cdfacb 602
5fef7dbc
JB		 603 skb_reserve(skb, local->hw.extra_tx_headroom);
604
605 /* copy in frame */
606 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
607 mgmt, DEAUTH_DISASSOC_LEN);
608
609 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
610 IEEE80211_SKB_CB(skb)->flags |=
611 IEEE80211_TX_INTFL_DONT_ENCRYPT;
a1845fc7 612
d5cdfacb 613 ieee80211_tx_skb(sdata, skb);
5fef7dbc 614 }
9ac19a90
JB		 615}
616
572e0012
KV		 617void ieee80211_send_pspoll(struct ieee80211_local *local,
618 struct ieee80211_sub_if_data *sdata)
619{
572e0012
KV		 620 struct ieee80211_pspoll *pspoll;
621 struct sk_buff *skb;
572e0012 622
d8cd189e
KV		 623 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
624 if (!skb)
572e0012 625 return;
572e0012 626
d8cd189e
KV		 627 pspoll = (struct ieee80211_pspoll *) skb->data;
628 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 629
62ae67be
JB		 630 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
631 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 632}
633
965bedad
JB		 634void ieee80211_send_nullfunc(struct ieee80211_local *local,
635 struct ieee80211_sub_if_data *sdata,
636 int powersave)
637{
638 struct sk_buff *skb;
d8cd189e 639 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 641
d8cd189e
KV		 642 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
643 if (!skb)
965bedad 644 return;
965bedad 645
d8cd189e 646 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 647 if (powersave)
d8cd189e 648 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 649
62ae67be 650 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 651 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
652 IEEE80211_STA_CONNECTION_POLL))
653 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
654
62ae67be 655 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 656}
657
d524215f
FF		 658static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
659 struct ieee80211_sub_if_data *sdata)
660{
661 struct sk_buff *skb;
662 struct ieee80211_hdr *nullfunc;
663 __le16 fc;
664
665 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
666 return;
667
668 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 669 if (!skb)
d524215f 670 return;
d15b8459 671
d524215f
FF		 672 skb_reserve(skb, local->hw.extra_tx_headroom);
673
674 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
675 memset(nullfunc, 0, 30);
676 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
677 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
678 nullfunc->frame_control = fc;
679 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
680 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
681 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
682 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
683
684 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
685 ieee80211_tx_skb(sdata, skb);
686}
687
cc32abd4
JB		 688/* spectrum management related things */
689static void ieee80211_chswitch_work(struct work_struct *work)
690{
691 struct ieee80211_sub_if_data *sdata =
692 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
694
9607e6b6 695 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 696 return;
697
77fdaa12
JB		 698 mutex_lock(&ifmgd->mtx);
699 if (!ifmgd->associated)
700 goto out;
cc32abd4
JB		 701
702 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 703 if (!sdata->local->ops->channel_switch) {
704 /* call "hw_config" only if doing sw channel switch */
705 ieee80211_hw_config(sdata->local,
706 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 707 } else {
708 /* update the device channel directly */
709 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 710 }
77fdaa12 711
cc32abd4 712 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 713 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 714
57eebdf3 715 /* XXX: wait for a beacon first? */
cc32abd4
JB		 716 ieee80211_wake_queues_by_reason(&sdata->local->hw,
717 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 718 out:
719 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
720 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 721}
722
5ce6e438
JB		 723void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
724{
725 struct ieee80211_sub_if_data *sdata;
726 struct ieee80211_if_managed *ifmgd;
727
728 sdata = vif_to_sdata(vif);
729 ifmgd = &sdata->u.mgd;
730
731 trace_api_chswitch_done(sdata, success);
732 if (!success) {
733 /*
734 * If the channel switch was not successful, stay
735 * around on the old channel. We currently lack
736 * good handling of this situation, possibly we
737 * should just drop the association.
738 */
739 sdata->local->csa_channel = sdata->local->oper_channel;
740 }
741
742 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
743}
744EXPORT_SYMBOL(ieee80211_chswitch_done);
745
cc32abd4
JB		 746static void ieee80211_chswitch_timer(unsigned long data)
747{
748 struct ieee80211_sub_if_data *sdata =
749 (struct ieee80211_sub_if_data *) data;
750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
751
5bb644a0
JB		 752 if (sdata->local->quiescing) {
753 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
754 return;
755 }
756
42935eca 757 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 758}
759
760void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
761 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 762 struct ieee80211_bss *bss,
763 u64 timestamp)
cc32abd4 764{
0c1ad2ca
JB		 765 struct cfg80211_bss *cbss =
766 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 767 struct ieee80211_channel *new_ch;
768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 769 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
770 cbss->channel->band);
cc32abd4 771
77fdaa12
JB		 772 ASSERT_MGD_MTX(ifmgd);
773
774 if (!ifmgd->associated)
cc32abd4
JB		 775 return;
776
fbe9c429 777 if (sdata->local->scanning)
cc32abd4
JB		 778 return;
779
780 /* Disregard subsequent beacons if we are already running a timer
781 processing a CSA */
782
783 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
784 return;
785
786 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
787 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
788 return;
789
790 sdata->local->csa_channel = new_ch;
791
57eebdf3
JB		 792 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
793
794 if (sw_elem->mode)
795 ieee80211_stop_queues_by_reason(&sdata->local->hw,
796 IEEE80211_QUEUE_STOP_REASON_CSA);
797
5ce6e438
JB		 798 if (sdata->local->ops->channel_switch) {
799 /* use driver's channel switch callback */
57eebdf3
JB		 800 struct ieee80211_channel_switch ch_switch = {
801 .timestamp = timestamp,
802 .block_tx = sw_elem->mode,
803 .channel = new_ch,
804 .count = sw_elem->count,
805 };
806
5ce6e438
JB		 807 drv_channel_switch(sdata->local, &ch_switch);
808 return;
809 }
810
811 /* channel switch handled in software */
57eebdf3 812 if (sw_elem->count <= 1)
42935eca 813 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 814 else
cc32abd4 815 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 816 TU_TO_EXP_TIME(sw_elem->count *
817 cbss->beacon_interval));
cc32abd4
JB		 818}
819
820static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
821 u16 capab_info, u8 *pwr_constr_elem,
822 u8 pwr_constr_elem_len)
823{
824 struct ieee80211_conf *conf = &sdata->local->hw.conf;
825
826 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
827 return;
828
829 /* Power constraint IE length should be 1 octet */
830 if (pwr_constr_elem_len != 1)
831 return;
832
a48b13ac 833 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 834 (*pwr_constr_elem != sdata->local->power_constr_level)) {
835 sdata->local->power_constr_level = *pwr_constr_elem;
836 ieee80211_hw_config(sdata->local, 0);
837 }
838}
839
f90754c1
JO		 840void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
841{
842 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
843 struct ieee80211_local *local = sdata->local;
844 struct ieee80211_conf *conf = &local->hw.conf;
845
846 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
847 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
848 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
849
850 local->disable_dynamic_ps = false;
851 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
852}
853EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
854
855void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
856{
857 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
858 struct ieee80211_local *local = sdata->local;
859 struct ieee80211_conf *conf = &local->hw.conf;
860
861 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
862 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
863 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
864
865 local->disable_dynamic_ps = true;
866 conf->dynamic_ps_timeout = 0;
867 del_timer_sync(&local->dynamic_ps_timer);
868 ieee80211_queue_work(&local->hw,
869 &local->dynamic_ps_enable_work);
870}
871EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
872
965bedad
JB		 873/* powersave */
874static void ieee80211_enable_ps(struct ieee80211_local *local,
875 struct ieee80211_sub_if_data *sdata)
876{
877 struct ieee80211_conf *conf = &local->hw.conf;
878
d5edaedc
JB		 879 /*
880 * If we are scanning right now then the parameters will
881 * take effect when scan finishes.
882 */
fbe9c429 883 if (local->scanning)
d5edaedc
JB		 884 return;
885
965bedad
JB		 886 if (conf->dynamic_ps_timeout > 0 &&
887 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
888 mod_timer(&local->dynamic_ps_timer, jiffies +
889 msecs_to_jiffies(conf->dynamic_ps_timeout));
890 } else {
891 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
892 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 893
2a13052f
JO		 894 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
895 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
896 return;
897
898 conf->flags |= IEEE80211_CONF_PS;
899 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 900 }
901}
902
903static void ieee80211_change_ps(struct ieee80211_local *local)
904{
905 struct ieee80211_conf *conf = &local->hw.conf;
906
907 if (local->ps_sdata) {
965bedad
JB		 908 ieee80211_enable_ps(local, local->ps_sdata);
909 } else if (conf->flags & IEEE80211_CONF_PS) {
910 conf->flags &= ~IEEE80211_CONF_PS;
911 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
912 del_timer_sync(&local->dynamic_ps_timer);
913 cancel_work_sync(&local->dynamic_ps_enable_work);
914 }
915}
916
808118cb
JY		 917static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
918{
919 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
920 struct sta_info *sta = NULL;
c2c98fde 921 bool authorized = false;
808118cb
JY		 922
923 if (!mgd->powersave)
924 return false;
925
05cb9108
JB		 926 if (mgd->broken_ap)
927 return false;
928
808118cb
JY		 929 if (!mgd->associated)
930 return false;
931
808118cb
JY		 932 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
933 IEEE80211_STA_CONNECTION_POLL))
934 return false;
935
936 rcu_read_lock();
937 sta = sta_info_get(sdata, mgd->bssid);
938 if (sta)
c2c98fde 939 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 940 rcu_read_unlock();
941
c2c98fde 942 return authorized;
808118cb
JY		 943}
944
965bedad 945/* need to hold RTNL or interface lock */
10f644a4 946void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 947{
948 struct ieee80211_sub_if_data *sdata, *found = NULL;
949 int count = 0;
195e294d 950 int timeout;
965bedad
JB		 951
952 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
953 local->ps_sdata = NULL;
954 return;
955 }
956
957 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 958 if (!ieee80211_sdata_running(sdata))
965bedad 959 continue;
8c7914de
RM		 960 if (sdata->vif.type == NL80211_IFTYPE_AP) {
961 /* If an AP vif is found, then disable PS
962 * by setting the count to zero thereby setting
963 * ps_sdata to NULL.
964 */
965 count = 0;
966 break;
967 }
965bedad
JB		 968 if (sdata->vif.type != NL80211_IFTYPE_STATION)
969 continue;
970 found = sdata;
971 count++;
972 }
973
808118cb 974 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 975 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 976 s32 beaconint_us;
977
978 if (latency < 0)
ed77134b 979 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 980
981 beaconint_us = ieee80211_tu_to_usec(
982 found->vif.bss_conf.beacon_int);
983
ff616381 984 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 985 if (timeout < 0) {
986 /*
ff616381
JO		 987 * Go to full PSM if the user configures a very low
988 * latency requirement.
0ab82b04
EP		 989 * The 2000 second value is there for compatibility
990 * until the PM_QOS_NETWORK_LATENCY is configured
991 * with real values.
195e294d 992 */
0ab82b04
EP		 993 if (latency > (1900 * USEC_PER_MSEC) &&
994 latency != (2000 * USEC_PER_SEC))
195e294d 995 timeout = 0;
ff616381
JO		 996 else
997 timeout = 100;
195e294d 998 }
f90754c1
JO		 999 local->dynamic_ps_user_timeout = timeout;
1000 if (!local->disable_dynamic_ps)
1001 conf->dynamic_ps_timeout =
1002 local->dynamic_ps_user_timeout;
195e294d 1003
04fe2037 1004 if (beaconint_us > latency) {
10f644a4 1005 local->ps_sdata = NULL;
04fe2037 1006 } else {
56007a02 1007 struct ieee80211_bss *bss;
04fe2037 1008 int maxslp = 1;
56007a02 1009 u8 dtimper;
04fe2037 1010
56007a02
JB		 1011 bss = (void *)found->u.mgd.associated->priv;
1012 dtimper = bss->dtim_period;
1013
1014 /* If the TIM IE is invalid, pretend the value is 1 */
1015 if (!dtimper)
1016 dtimper = 1;
1017 else if (dtimper > 1)
04fe2037
JB		 1018 maxslp = min_t(int, dtimper,
1019 latency / beaconint_us);
1020
9ccebe61 1021 local->hw.conf.max_sleep_period = maxslp;
56007a02 1022 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1023 local->ps_sdata = found;
04fe2037 1024 }
10f644a4 1025 } else {
965bedad 1026 local->ps_sdata = NULL;
10f644a4 1027 }
965bedad
JB		 1028
1029 ieee80211_change_ps(local);
1030}
1031
ab095877
EP		 1032void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1033{
1034 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1035
1036 if (sdata->vif.bss_conf.ps != ps_allowed) {
1037 sdata->vif.bss_conf.ps = ps_allowed;
1038 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1039 }
1040}
1041
965bedad
JB		 1042void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1043{
1044 struct ieee80211_local *local =
1045 container_of(work, struct ieee80211_local,
1046 dynamic_ps_disable_work);
1047
1048 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1049 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1050 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1051 }
1052
1053 ieee80211_wake_queues_by_reason(&local->hw,
1054 IEEE80211_QUEUE_STOP_REASON_PS);
1055}
1056
1057void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1058{
1059 struct ieee80211_local *local =
1060 container_of(work, struct ieee80211_local,
1061 dynamic_ps_enable_work);
1062 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1063 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1064 unsigned long flags;
1065 int q;
965bedad
JB		 1066
1067 /* can only happen when PS was just disabled anyway */
1068 if (!sdata)
1069 return;
1070
5e34069c
CL		 1071 ifmgd = &sdata->u.mgd;
1072
965bedad
JB		 1073 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1074 return;
1075
77b7023a
AN		 1076 if (!local->disable_dynamic_ps &&
1077 local->hw.conf.dynamic_ps_timeout > 0) {
1078 /* don't enter PS if TX frames are pending */
1079 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1080 mod_timer(&local->dynamic_ps_timer, jiffies +
1081 msecs_to_jiffies(
1082 local->hw.conf.dynamic_ps_timeout));
1083 return;
1084 }
77b7023a
AN		 1085
1086 /*
1087 * transmission can be stopped by others which leads to
1088 * dynamic_ps_timer expiry. Postpone the ps timer if it
1089 * is not the actual idle state.
1090 */
1091 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1092 for (q = 0; q < local->hw.queues; q++) {
1093 if (local->queue_stop_reasons[q]) {
1094 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1095 flags);
1096 mod_timer(&local->dynamic_ps_timer, jiffies +
1097 msecs_to_jiffies(
1098 local->hw.conf.dynamic_ps_timeout));
1099 return;
1100 }
1101 }
1102 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1103 }
1ddc2867 1104
375177bf 1105 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1106 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1107 netif_tx_stop_all_queues(sdata->dev);
965bedad 1108
e8306f98
VN		 1109 if (drv_tx_frames_pending(local))
1110 mod_timer(&local->dynamic_ps_timer, jiffies +
1111 msecs_to_jiffies(
1112 local->hw.conf.dynamic_ps_timeout));
1113 else {
1114 ieee80211_send_nullfunc(local, sdata, 1);
1115 /* Flush to get the tx status of nullfunc frame */
1116 drv_flush(local, false);
1117 }
f3e85b9e
VN		 1118 }
1119
2a13052f
JO		 1120 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1121 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1122 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1123 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1124 local->hw.conf.flags |= IEEE80211_CONF_PS;
1125 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1126 }
f3e85b9e 1127
77b7023a
AN		 1128 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1129 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1130}
1131
1132void ieee80211_dynamic_ps_timer(unsigned long data)
1133{
1134 struct ieee80211_local *local = (void *) data;
1135
78f1a8b7 1136 if (local->quiescing || local->suspended)
5bb644a0
JB		 1137 return;
1138
42935eca 1139 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1140}
1141
60f8b39c 1142/* MLME */
7d25745d 1143static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1144 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1145 u8 *wmm_param, size_t wmm_param_len)
1146{
f0706e82 1147 struct ieee80211_tx_queue_params params;
4ced3f74 1148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1149 size_t left;
1150 int count;
ab13315a 1151 u8 *pos, uapsd_queues = 0;
f0706e82 1152
e1b3ec1a 1153 if (!local->ops->conf_tx)
7d25745d 1154 return false;
e1b3ec1a 1155
32c5057b 1156 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1157 return false;
3434fbd3
JB		 1158
1159 if (!wmm_param)
7d25745d 1160 return false;
3434fbd3 1161
f0706e82 1162 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1163 return false;
ab13315a
KV		 1164
1165 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1166 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1167
f0706e82 1168 count = wmm_param[6] & 0x0f;
46900298 1169 if (count == ifmgd->wmm_last_param_set)
7d25745d 1170 return false;
46900298 1171 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1172
1173 pos = wmm_param + 8;
1174 left = wmm_param_len - 8;
1175
1176 memset(&params, 0, sizeof(params));
1177
00e96dec 1178 sdata->wmm_acm = 0;
f0706e82
JB		 1179 for (; left >= 4; left -= 4, pos += 4) {
1180 int aci = (pos[0] >> 5) & 0x03;
1181 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1182 bool uapsd = false;
f0706e82
JB		 1183 int queue;
1184
1185 switch (aci) {
0eeb59fe 1186 case 1: /* AC_BK */
e100bb64 1187 queue = 3;
988c0f72 1188 if (acm)
00e96dec 1189 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1190 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1191 uapsd = true;
f0706e82 1192 break;
0eeb59fe 1193 case 2: /* AC_VI */
e100bb64 1194 queue = 1;
988c0f72 1195 if (acm)
00e96dec 1196 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1197 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1198 uapsd = true;
f0706e82 1199 break;
0eeb59fe 1200 case 3: /* AC_VO */
e100bb64 1201 queue = 0;
988c0f72 1202 if (acm)
00e96dec 1203 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1204 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1205 uapsd = true;
f0706e82 1206 break;
0eeb59fe 1207 case 0: /* AC_BE */
f0706e82 1208 default:
e100bb64 1209 queue = 2;
988c0f72 1210 if (acm)
00e96dec 1211 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1212 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1213 uapsd = true;
f0706e82
JB		 1214 break;
1215 }
1216
1217 params.aifs = pos[0] & 0x0f;
1218 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1219 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1220 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1221 params.uapsd = uapsd;
1222
bdcbd8e0
JB		 1223 mlme_dbg(sdata,
1224 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1225 queue, aci, acm,
1226 params.aifs, params.cw_min, params.cw_max,
1227 params.txop, params.uapsd);
f6f3def3
EP		 1228 sdata->tx_conf[queue] = params;
1229 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1230 sdata_err(sdata,
1231 "failed to set TX queue parameters for queue %d\n",
1232 queue);
f0706e82 1233 }
e1b3ec1a
SG		 1234
1235 /* enable WMM or activate new settings */
4ced3f74 1236 sdata->vif.bss_conf.qos = true;
7d25745d 1237 return true;
f0706e82
JB		 1238}
1239
925e64c3
SG		 1240static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1241{
1242 lockdep_assert_held(&sdata->local->mtx);
1243
1244 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1245 IEEE80211_STA_BEACON_POLL);
1246 ieee80211_run_deferred_scan(sdata->local);
1247}
1248
1249static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1250{
1251 mutex_lock(&sdata->local->mtx);
1252 __ieee80211_stop_poll(sdata);
1253 mutex_unlock(&sdata->local->mtx);
1254}
1255
7a5158ef
JB		 1256static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1257 u16 capab, bool erp_valid, u8 erp)
5628221c 1258{
bda3933a 1259 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1260 u32 changed = 0;
7a5158ef
JB		 1261 bool use_protection;
1262 bool use_short_preamble;
1263 bool use_short_slot;
1264
1265 if (erp_valid) {
1266 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1267 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1268 } else {
1269 use_protection = false;
1270 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1271 }
1272
1273 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
568d6e28 1274 if (sdata->local->oper_channel->band == IEEE80211_BAND_5GHZ)
43d35343 1275 use_short_slot = true;
5628221c 1276
471b3efd 1277 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1278 bss_conf->use_cts_prot = use_protection;
1279 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1280 }
7e9ed188 1281
d43c7b37 1282 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1283 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1284 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1285 }
d9430a32 1286
7a5158ef 1287 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1288 bss_conf->use_short_slot = use_short_slot;
1289 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1290 }
1291
1292 return changed;
1293}
1294
f698d856 1295static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1296 struct cfg80211_bss *cbss,
ae5eb026 1297 u32 bss_info_changed)
f0706e82 1298{
0c1ad2ca 1299 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1300 struct ieee80211_local *local = sdata->local;
68542962 1301 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1302
ae5eb026 1303 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1304 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1305 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1306
7ccc8bd7
FF		 1307 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1308 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1309
0c1ad2ca
JB		 1310 sdata->u.mgd.associated = cbss;
1311 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1312
17e4ec14
JM		 1313 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1314
b291ba11 1315 /* just to be sure */
925e64c3 1316 ieee80211_stop_poll(sdata);
b291ba11 1317
9ac19a90 1318 ieee80211_led_assoc(local, 1);
9306102e 1319
e5b900d2
JB		 1320 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1321 bss_conf->dtim_period = bss->dtim_period;
1322 else
1323 bss_conf->dtim_period = 0;
1324
68542962 1325 bss_conf->assoc = 1;
9cef8737 1326
a97c13c3 1327 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1328 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1329 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1330 bss_info_changed |= BSS_CHANGED_CQM;
1331
68542962
JO		 1332 /* Enable ARP filtering */
1333 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1334 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1335 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1336 }
1337
ae5eb026 1338 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1339
056508dc
JB		 1340 mutex_lock(&local->iflist_mtx);
1341 ieee80211_recalc_ps(local, -1);
025e6be2 1342 ieee80211_recalc_smps(local);
056508dc 1343 mutex_unlock(&local->iflist_mtx);
e0cb686f 1344
ab095877
EP		 1345 ieee80211_recalc_ps_vif(sdata);
1346
8a5b33f5 1347 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1348 netif_carrier_on(sdata->dev);
f0706e82
JB		 1349}
1350
e69e95db 1351static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1352 u16 stype, u16 reason, bool tx,
1353 u8 *frame_buf)
aa458d17 1354{
46900298 1355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1356 struct ieee80211_local *local = sdata->local;
1357 struct sta_info *sta;
3cc5240b 1358 u32 changed = 0;
aa458d17 1359
77fdaa12
JB		 1360 ASSERT_MGD_MTX(ifmgd);
1361
37ad3888
JB		 1362 if (WARN_ON_ONCE(tx && !frame_buf))
1363 return;
1364
b291ba11
JB		 1365 if (WARN_ON(!ifmgd->associated))
1366 return;
1367
79543d8e
DS		 1368 ieee80211_stop_poll(sdata);
1369
77fdaa12 1370 ifmgd->associated = NULL;
77fdaa12
JB		 1371
1372 /*
1373 * we need to commit the associated = NULL change because the
1374 * scan code uses that to determine whether this iface should
1375 * go to/wake up from powersave or not -- and could otherwise
1376 * wake the queues erroneously.
1377 */
1378 smp_mb();
1379
1380 /*
1381 * Thus, we can only afterwards stop the queues -- to account
1382 * for the case where another CPU is finishing a scan at this
1383 * time -- we don't want the scan code to enable queues.
1384 */
aa458d17 1385
8a5b33f5 1386 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1387 netif_carrier_off(sdata->dev);
1388
2a419056 1389 mutex_lock(&local->sta_mtx);
88a9e31c 1390 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1391 if (sta) {
c2c98fde 1392 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1393 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1394 }
2a419056 1395 mutex_unlock(&local->sta_mtx);
aa458d17 1396
88bc40e8
EP		 1397 /*
1398 * if we want to get out of ps before disassoc (why?) we have
1399 * to do it before sending disassoc, as otherwise the null-packet
1400 * won't be valid.
1401 */
1402 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1403 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1404 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1405 }
1406 local->ps_sdata = NULL;
1407
ab095877
EP		 1408 /* disable per-vif ps */
1409 ieee80211_recalc_ps_vif(sdata);
1410
f823981e
EP		 1411 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1412 if (tx)
1413 drv_flush(local, false);
1414
37ad3888
JB		 1415 /* deauthenticate/disassociate now */
1416 if (tx || frame_buf)
88a9e31c
EP		 1417 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1418 reason, tx, frame_buf);
37ad3888
JB		 1419
1420 /* flush out frame */
1421 if (tx)
1422 drv_flush(local, false);
1423
88a9e31c
EP		 1424 /* clear bssid only after building the needed mgmt frames */
1425 memset(ifmgd->bssid, 0, ETH_ALEN);
1426
37ad3888
JB		 1427 /* remove AP and TDLS peers */
1428 sta_info_flush(local, sdata);
1429
1430 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1431 changed |= ieee80211_reset_erp_info(sdata);
1432
f5e5bf25 1433 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1434 changed |= BSS_CHANGED_ASSOC;
1435 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1436
413ad50a 1437 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1438 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1439 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1440
a8302de9
VT		 1441 local->power_constr_level = 0;
1442
520eb820
KV		 1443 del_timer_sync(&local->dynamic_ps_timer);
1444 cancel_work_sync(&local->dynamic_ps_enable_work);
1445
68542962
JO		 1446 /* Disable ARP filtering */
1447 if (sdata->vif.bss_conf.arp_filter_enabled) {
1448 sdata->vif.bss_conf.arp_filter_enabled = false;
1449 changed |= BSS_CHANGED_ARP_FILTER;
1450 }
1451
3abead59
JB		 1452 sdata->vif.bss_conf.qos = false;
1453 changed |= BSS_CHANGED_QOS;
1454
0aaffa9b
JB		 1455 /* The BSSID (not really interesting) and HT changed */
1456 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1457 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1458
3cc5240b
JB		 1459 /* channel(_type) changes are handled by ieee80211_hw_config */
1460 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1461 ieee80211_hw_config(local, 0);
1462
3abead59
JB		 1463 /* disassociated - set to defaults now */
1464 ieee80211_set_wmm_default(sdata, false);
1465
b9dcf712
JB		 1466 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1467 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1468 del_timer_sync(&sdata->u.mgd.timer);
1469 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1470}
f0706e82 1471
3cf335d5
KV		 1472void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1473 struct ieee80211_hdr *hdr)
1474{
1475 /*
1476 * We can postpone the mgd.timer whenever receiving unicast frames
1477 * from AP because we know that the connection is working both ways
1478 * at that time. But multicast frames (and hence also beacons) must
1479 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1480 * data idle periods for sending the periodic probe request to the
1481 * AP we're connected to.
3cf335d5 1482 */
b291ba11
JB		 1483 if (is_multicast_ether_addr(hdr->addr1))
1484 return;
1485
be099e82 1486 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1487}
f0706e82 1488
4e5ff376
FF		 1489static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1490{
1491 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1492 struct ieee80211_local *local = sdata->local;
4e5ff376 1493
133d40f9 1494 mutex_lock(&local->mtx);
4e5ff376 1495 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1496 IEEE80211_STA_CONNECTION_POLL))) {
1497 mutex_unlock(&local->mtx);
1498 return;
1499 }
4e5ff376 1500
925e64c3 1501 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1502
1503 mutex_lock(&local->iflist_mtx);
1504 ieee80211_recalc_ps(local, -1);
1505 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1506
1507 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1508 goto out;
4e5ff376
FF		 1509
1510 /*
1511 * We've received a probe response, but are not sure whether
1512 * we have or will be receiving any beacons or data, so let's
1513 * schedule the timers again, just in case.
1514 */
1515 ieee80211_sta_reset_beacon_monitor(sdata);
1516
1517 mod_timer(&ifmgd->conn_mon_timer,
1518 round_jiffies_up(jiffies +
1519 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1520out:
133d40f9 1521 mutex_unlock(&local->mtx);
4e5ff376
FF		 1522}
1523
1524void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1525 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1526{
75706d0e 1527 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1528 return;
1529
04ac3c0e
FF		 1530 if (ack)
1531 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1532
1533 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1534 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1535 if (ack)
1536 sdata->u.mgd.probe_send_count = 0;
1537 else
1538 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1539 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1540 }
1541}
1542
a43abf29
ML		 1543static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1544{
1545 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1546 const u8 *ssid;
f01a067d 1547 u8 *dst = ifmgd->associated->bssid;
180205bd 1548 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1549
1550 /*
1551 * Try sending broadcast probe requests for the last three
1552 * probe requests after the first ones failed since some
1553 * buggy APs only support broadcast probe requests.
1554 */
1555 if (ifmgd->probe_send_count >= unicast_limit)
1556 dst = NULL;
a43abf29 1557
4e5ff376
FF		 1558 /*
1559 * When the hardware reports an accurate Tx ACK status, it's
1560 * better to send a nullfunc frame instead of a probe request,
1561 * as it will kick us off the AP quickly if we aren't associated
1562 * anymore. The timeout will be reset if the frame is ACKed by
1563 * the AP.
1564 */
992e68bf
SD		 1565 ifmgd->probe_send_count++;
1566
04ac3c0e
FF		 1567 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1568 ifmgd->nullfunc_failed = false;
4e5ff376 1569 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1570 } else {
88c868c4
SG		 1571 int ssid_len;
1572
4e5ff376 1573 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1574 if (WARN_ON_ONCE(ssid == NULL))
1575 ssid_len = 0;
1576 else
1577 ssid_len = ssid[1];
1578
1579 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1580 0, (u32) -1, true, false);
4e5ff376 1581 }
a43abf29 1582
180205bd 1583 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1584 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1585 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1586 drv_flush(sdata->local, false);
a43abf29
ML		 1587}
1588
b291ba11
JB		 1589static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1590 bool beacon)
04de8381 1591{
04de8381 1592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1593 bool already = false;
34bfc411 1594
9607e6b6 1595 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1596 return;
1597
77fdaa12
JB		 1598 mutex_lock(&ifmgd->mtx);
1599
1600 if (!ifmgd->associated)
1601 goto out;
1602
133d40f9
SG		 1603 mutex_lock(&sdata->local->mtx);
1604
1605 if (sdata->local->tmp_channel || sdata->local->scanning) {
1606 mutex_unlock(&sdata->local->mtx);
1607 goto out;
1608 }
1609
e87cc472 1610 if (beacon)
bdcbd8e0
JB		 1611 mlme_dbg_ratelimited(sdata,
1612 "detected beacon loss from AP - sending probe request\n");
1613
6efb71b0
HS		 1614 ieee80211_cqm_rssi_notify(&sdata->vif,
1615 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1616
b291ba11
JB		 1617 /*
1618 * The driver/our work has already reported this event or the
1619 * connection monitoring has kicked in and we have already sent
1620 * a probe request. Or maybe the AP died and the driver keeps
1621 * reporting until we disassociate...
1622 *
1623 * In either case we have to ignore the current call to this
1624 * function (except for setting the correct probe reason bit)
1625 * because otherwise we would reset the timer every time and
1626 * never check whether we received a probe response!
1627 */
1628 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1629 IEEE80211_STA_CONNECTION_POLL))
1630 already = true;
1631
1632 if (beacon)
1633 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1634 else
1635 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1636
133d40f9
SG		 1637 mutex_unlock(&sdata->local->mtx);
1638
b291ba11
JB		 1639 if (already)
1640 goto out;
1641
4e751843
JB		 1642 mutex_lock(&sdata->local->iflist_mtx);
1643 ieee80211_recalc_ps(sdata->local, -1);
1644 mutex_unlock(&sdata->local->iflist_mtx);
1645
a43abf29
ML		 1646 ifmgd->probe_send_count = 0;
1647 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1648 out:
1649 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1650}
1651
a619a4c0
JO		 1652struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1653 struct ieee80211_vif *vif)
1654{
1655 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1657 struct cfg80211_bss *cbss;
a619a4c0
JO		 1658 struct sk_buff *skb;
1659 const u8 *ssid;
88c868c4 1660 int ssid_len;
a619a4c0
JO		 1661
1662 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1663 return NULL;
1664
1665 ASSERT_MGD_MTX(ifmgd);
1666
d9b3b28b
EP		 1667 if (ifmgd->associated)
1668 cbss = ifmgd->associated;
1669 else if (ifmgd->auth_data)
1670 cbss = ifmgd->auth_data->bss;
1671 else if (ifmgd->assoc_data)
1672 cbss = ifmgd->assoc_data->bss;
1673 else
a619a4c0
JO		 1674 return NULL;
1675
d9b3b28b 1676 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1677 if (WARN_ON_ONCE(ssid == NULL))
1678 ssid_len = 0;
1679 else
1680 ssid_len = ssid[1];
1681
d9b3b28b 1682 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
6b77863b
JB		 1683 (u32) -1,
1684 sdata->local->oper_channel,
1685 ssid + 2, ssid_len,
85a237fe 1686 NULL, 0, true);
a619a4c0
JO		 1687
1688 return skb;
1689}
1690EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1691
1e4dcd01
JO		 1692static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1693{
1694 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1695 struct ieee80211_local *local = sdata->local;
5fef7dbc 1696 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1697
1698 mutex_lock(&ifmgd->mtx);
1699 if (!ifmgd->associated) {
1700 mutex_unlock(&ifmgd->mtx);
1701 return;
1702 }
1703
90bcf867
JB		 1704 sdata_info(sdata, "Connection to AP %pM lost\n",
1705 ifmgd->associated->bssid);
1e4dcd01 1706
37ad3888
JB		 1707 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1708 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1709 false, frame_buf);
1e4dcd01 1710 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1711
1e4dcd01
JO		 1712 /*
1713 * must be outside lock due to cfg80211,
1714 * but that's not a problem.
1715 */
5fef7dbc 1716 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1717
1718 mutex_lock(&local->mtx);
1719 ieee80211_recalc_idle(local);
1720 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1721}
1722
1723void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1724{
1725 struct ieee80211_sub_if_data *sdata =
1726 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1727 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1729 struct sta_info *sta;
1730
1731 if (ifmgd->associated) {
30fa9047 1732 rcu_read_lock();
a85e1d55
PS		 1733 sta = sta_info_get(sdata, ifmgd->bssid);
1734 if (sta)
1735 sta->beacon_loss_count++;
30fa9047 1736 rcu_read_unlock();
a85e1d55 1737 }
b291ba11 1738
1e4dcd01
JO		 1739 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1740 __ieee80211_connection_loss(sdata);
1741 else
1742 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1743}
1744
04de8381
KV		 1745void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1746{
1747 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1748 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1749
b5878a2d
JB		 1750 trace_api_beacon_loss(sdata);
1751
1e4dcd01
JO		 1752 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1753 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1754}
1755EXPORT_SYMBOL(ieee80211_beacon_loss);
1756
1e4dcd01
JO		 1757void ieee80211_connection_loss(struct ieee80211_vif *vif)
1758{
1759 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1760 struct ieee80211_hw *hw = &sdata->local->hw;
1761
b5878a2d
JB		 1762 trace_api_connection_loss(sdata);
1763
1e4dcd01
JO		 1764 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1765 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1766}
1767EXPORT_SYMBOL(ieee80211_connection_loss);
1768
1769
66e67e41
JB		 1770static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1771 bool assoc)
1772{
1773 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1774
1775 lockdep_assert_held(&sdata->u.mgd.mtx);
1776
66e67e41
JB		 1777 if (!assoc) {
1778 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1779
1780 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1781 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1782 }
1783
1784 cfg80211_put_bss(auth_data->bss);
1785 kfree(auth_data);
1786 sdata->u.mgd.auth_data = NULL;
1787}
1788
1789static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1790 struct ieee80211_mgmt *mgmt, size_t len)
1791{
1792 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1793 u8 *pos;
1794 struct ieee802_11_elems elems;
1795
1796 pos = mgmt->u.auth.variable;
1797 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1798 if (!elems.challenge)
1799 return;
1800 auth_data->expected_transaction = 4;
a1845fc7 1801 drv_mgd_prepare_tx(sdata->local, sdata);
66e67e41
JB		 1802 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1803 elems.challenge - 2, elems.challenge_len + 2,
1804 auth_data->bss->bssid, auth_data->bss->bssid,
1805 auth_data->key, auth_data->key_len,
1806 auth_data->key_idx);
1807}
1808
1809static enum rx_mgmt_action __must_check
1810ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1811 struct ieee80211_mgmt *mgmt, size_t len)
1812{
1813 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1814 u8 bssid[ETH_ALEN];
1815 u16 auth_alg, auth_transaction, status_code;
1816 struct sta_info *sta;
1817
1818 lockdep_assert_held(&ifmgd->mtx);
1819
1820 if (len < 24 + 6)
1821 return RX_MGMT_NONE;
1822
1823 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1824 return RX_MGMT_NONE;
1825
1826 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1827
b203ca39 1828 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1829 return RX_MGMT_NONE;
1830
1831 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1832 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1833 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1834
1835 if (auth_alg != ifmgd->auth_data->algorithm ||
1836 auth_transaction != ifmgd->auth_data->expected_transaction)
1837 return RX_MGMT_NONE;
1838
1839 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1840 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1841 mgmt->sa, status_code);
dac211ec
EP		 1842 ieee80211_destroy_auth_data(sdata, false);
1843 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1844 }
1845
1846 switch (ifmgd->auth_data->algorithm) {
1847 case WLAN_AUTH_OPEN:
1848 case WLAN_AUTH_LEAP:
1849 case WLAN_AUTH_FT:
1850 break;
1851 case WLAN_AUTH_SHARED_KEY:
1852 if (ifmgd->auth_data->expected_transaction != 4) {
1853 ieee80211_auth_challenge(sdata, mgmt, len);
1854 /* need another frame */
1855 return RX_MGMT_NONE;
1856 }
1857 break;
1858 default:
1859 WARN_ONCE(1, "invalid auth alg %d",
1860 ifmgd->auth_data->algorithm);
1861 return RX_MGMT_NONE;
1862 }
1863
bdcbd8e0 1864 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1865 ifmgd->auth_data->done = true;
1866 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1867 run_again(ifmgd, ifmgd->auth_data->timeout);
1868
1869 /* move station state to auth */
1870 mutex_lock(&sdata->local->sta_mtx);
1871 sta = sta_info_get(sdata, bssid);
1872 if (!sta) {
1873 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1874 goto out_err;
1875 }
1876 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1877 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1878 goto out_err;
1879 }
1880 mutex_unlock(&sdata->local->sta_mtx);
1881
1882 return RX_MGMT_CFG80211_RX_AUTH;
1883 out_err:
1884 mutex_unlock(&sdata->local->sta_mtx);
1885 /* ignore frame -- wait for timeout */
1886 return RX_MGMT_NONE;
1887}
1888
1889
77fdaa12
JB		 1890static enum rx_mgmt_action __must_check
1891ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1892 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1893{
46900298 1894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1895 const u8 *bssid = NULL;
f0706e82
JB		 1896 u16 reason_code;
1897
66e67e41
JB		 1898 lockdep_assert_held(&ifmgd->mtx);
1899
f4ea83dd 1900 if (len < 24 + 2)
77fdaa12 1901 return RX_MGMT_NONE;
f0706e82 1902
66e67e41 1903 if (!ifmgd->associated ||
b203ca39 1904 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1905 return RX_MGMT_NONE;
77fdaa12 1906
0c1ad2ca 1907 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1908
1909 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1910
bdcbd8e0
JB		 1911 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1912 bssid, reason_code);
77fdaa12 1913
37ad3888
JB		 1914 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1915
7da7cc1d 1916 mutex_lock(&sdata->local->mtx);
63f170e0 1917 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1918 mutex_unlock(&sdata->local->mtx);
f0706e82 1919
77fdaa12 1920 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1921}
1922
1923
77fdaa12
JB		 1924static enum rx_mgmt_action __must_check
1925ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1926 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1927{
46900298 1928 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1929 u16 reason_code;
1930
66e67e41 1931 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1932
66e67e41 1933 if (len < 24 + 2)
77fdaa12
JB		 1934 return RX_MGMT_NONE;
1935
66e67e41 1936 if (!ifmgd->associated ||
b203ca39 1937 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1938 return RX_MGMT_NONE;
f0706e82
JB		 1939
1940 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1941
bdcbd8e0
JB		 1942 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1943 mgmt->sa, reason_code);
f0706e82 1944
37ad3888
JB		 1945 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1946
7da7cc1d 1947 mutex_lock(&sdata->local->mtx);
bc83b681 1948 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1949 mutex_unlock(&sdata->local->mtx);
37ad3888 1950
77fdaa12 1951 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1952}
1953
c74d084f
CL		 1954static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1955 u8 *supp_rates, unsigned int supp_rates_len,
1956 u32 *rates, u32 *basic_rates,
1957 bool *have_higher_than_11mbit,
1958 int *min_rate, int *min_rate_index)
1959{
1960 int i, j;
1961
1962 for (i = 0; i < supp_rates_len; i++) {
1963 int rate = (supp_rates[i] & 0x7f) * 5;
1964 bool is_basic = !!(supp_rates[i] & 0x80);
1965
1966 if (rate > 110)
1967 *have_higher_than_11mbit = true;
1968
1969 /*
1970 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1971 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1972 *
1973 * Note: Even through the membership selector and the basic
1974 * rate flag share the same bit, they are not exactly
1975 * the same.
1976 */
1977 if (!!(supp_rates[i] & 0x80) &&
1978 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1979 continue;
1980
1981 for (j = 0; j < sband->n_bitrates; j++) {
1982 if (sband->bitrates[j].bitrate == rate) {
1983 *rates |= BIT(j);
1984 if (is_basic)
1985 *basic_rates |= BIT(j);
1986 if (rate < *min_rate) {
1987 *min_rate = rate;
1988 *min_rate_index = j;
1989 }
1990 break;
1991 }
1992 }
1993 }
1994}
f0706e82 1995
66e67e41
JB		 1996static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1997 bool assoc)
1998{
1999 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2000
2001 lockdep_assert_held(&sdata->u.mgd.mtx);
2002
66e67e41
JB		 2003 if (!assoc) {
2004 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2005
2006 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2007 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2008 }
2009
2010 kfree(assoc_data);
2011 sdata->u.mgd.assoc_data = NULL;
2012}
2013
2014static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2015 struct cfg80211_bss *cbss,
af6b6374 2016 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2017{
46900298 2018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2019 struct ieee80211_local *local = sdata->local;
8318d78a 2020 struct ieee80211_supported_band *sband;
f0706e82 2021 struct sta_info *sta;
af6b6374 2022 u8 *pos;
af6b6374 2023 u16 capab_info, aid;
f0706e82 2024 struct ieee802_11_elems elems;
bda3933a 2025 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2026 u32 changed = 0;
c74d084f 2027 int err;
f0706e82 2028
af6b6374 2029 /* AssocResp and ReassocResp have identical structure */
f0706e82 2030
f0706e82 2031 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2032 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2033
1dd84aa2 2034 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2035 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2036 aid);
1dd84aa2
JB		 2037 aid &= ~(BIT(15) | BIT(14));
2038
05cb9108
JB		 2039 ifmgd->broken_ap = false;
2040
2041 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2042 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2043 aid);
05cb9108
JB		 2044 aid = 0;
2045 ifmgd->broken_ap = true;
2046 }
2047
af6b6374
JB		 2048 pos = mgmt->u.assoc_resp.variable;
2049 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2050
f0706e82 2051 if (!elems.supp_rates) {
bdcbd8e0 2052 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2053 return false;
f0706e82
JB		 2054 }
2055
46900298 2056 ifmgd->aid = aid;
f0706e82 2057
2a33bee2
GE		 2058 mutex_lock(&sdata->local->sta_mtx);
2059 /*
2060 * station info was already allocated and inserted before
2061 * the association and should be available to us
2062 */
7852e361 2063 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2064 if (WARN_ON(!sta)) {
2065 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2066 return false;
77fdaa12 2067 }
05e5e883 2068
66e67e41 2069 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2070
ab1faead 2071 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2072 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2073 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2074
64f68e5d
JB		 2075 sta->supports_40mhz =
2076 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2077
4b7679a5 2078 rate_control_rate_init(sta);
f0706e82 2079
46900298 2080 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2081 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2082
ddf4ac53 2083 if (elems.wmm_param)
c2c98fde 2084 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2085
c8987876
JB		 2086 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2087 if (!err)
2088 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2089 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2090 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2091 if (err) {
bdcbd8e0
JB		 2092 sdata_info(sdata,
2093 "failed to move station %pM to desired state\n",
2094 sta->sta.addr);
c8987876
JB		 2095 WARN_ON(__sta_info_destroy(sta));
2096 mutex_unlock(&sdata->local->sta_mtx);
2097 return false;
2098 }
2099
7852e361 2100 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2101
f2176d72
JO		 2102 /*
2103 * Always handle WMM once after association regardless
2104 * of the first value the AP uses. Setting -1 here has
2105 * that effect because the AP values is an unsigned
2106 * 4-bit value.
2107 */
2108 ifmgd->wmm_last_param_set = -1;
2109
ddf4ac53 2110 if (elems.wmm_param)
4ced3f74 2111 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2112 elems.wmm_param_len);
aa837e1d 2113 else
3abead59
JB		 2114 ieee80211_set_wmm_default(sdata, false);
2115 changed |= BSS_CHANGED_QOS;
f0706e82 2116
074d46d1 2117 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2118 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2119 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2120 cbss->bssid, false);
ae5eb026 2121
60f8b39c
JB		 2122 /* set AID and assoc capability,
2123 * ieee80211_set_associated() will tell the driver */
2124 bss_conf->aid = aid;
2125 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2126 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2127
d524215f
FF		 2128 /*
2129 * If we're using 4-addr mode, let the AP know that we're
2130 * doing so, so that it can create the STA VLAN on its side
2131 */
2132 if (ifmgd->use_4addr)
2133 ieee80211_send_4addr_nullfunc(local, sdata);
2134
15b7b062 2135 /*
b291ba11
JB		 2136 * Start timer to probe the connection to the AP now.
2137 * Also start the timer that will detect beacon loss.
15b7b062 2138 */
b291ba11 2139 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2140 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2141
af6b6374 2142 return true;
f0706e82
JB		 2143}
2144
66e67e41
JB		 2145static enum rx_mgmt_action __must_check
2146ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2147 struct ieee80211_mgmt *mgmt, size_t len,
2148 struct cfg80211_bss **bss)
2149{
2150 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2151 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2152 u16 capab_info, status_code, aid;
2153 struct ieee802_11_elems elems;
2154 u8 *pos;
2155 bool reassoc;
2156
2157 lockdep_assert_held(&ifmgd->mtx);
2158
2159 if (!assoc_data)
2160 return RX_MGMT_NONE;
b203ca39 2161 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2162 return RX_MGMT_NONE;
2163
2164 /*
2165 * AssocResp and ReassocResp have identical structure, so process both
2166 * of them in this function.
2167 */
2168
2169 if (len < 24 + 6)
2170 return RX_MGMT_NONE;
2171
2172 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2173 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2174 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2175 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2176
bdcbd8e0
JB		 2177 sdata_info(sdata,
2178 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2179 reassoc ? "Rea" : "A", mgmt->sa,
2180 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2181
2182 pos = mgmt->u.assoc_resp.variable;
2183 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2184
2185 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2186 elems.timeout_int && elems.timeout_int_len == 5 &&
2187 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2188 u32 tu, ms;
2189 tu = get_unaligned_le32(elems.timeout_int + 1);
2190 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2191 sdata_info(sdata,
2192 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2193 mgmt->sa, tu, ms);
66e67e41
JB		 2194 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2195 if (ms > IEEE80211_ASSOC_TIMEOUT)
2196 run_again(ifmgd, assoc_data->timeout);
2197 return RX_MGMT_NONE;
2198 }
2199
2200 *bss = assoc_data->bss;
2201
2202 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2203 sdata_info(sdata, "%pM denied association (code=%d)\n",
2204 mgmt->sa, status_code);
66e67e41
JB		 2205 ieee80211_destroy_assoc_data(sdata, false);
2206 } else {
66e67e41
JB		 2207 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2208 /* oops -- internal error -- send timeout for now */
10a9109f 2209 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2210 cfg80211_put_bss(*bss);
2211 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2212 }
635d999f 2213 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2214
2215 /*
2216 * destroy assoc_data afterwards, as otherwise an idle
2217 * recalc after assoc_data is NULL but before associated
2218 * is set can cause the interface to go idle
2219 */
2220 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2221 }
2222
2223 return RX_MGMT_CFG80211_RX_ASSOC;
2224}
98c8fccf
JB		 2225static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2226 struct ieee80211_mgmt *mgmt,
2227 size_t len,
2228 struct ieee80211_rx_status *rx_status,
2229 struct ieee802_11_elems *elems,
2230 bool beacon)
2231{
2232 struct ieee80211_local *local = sdata->local;
2233 int freq;
c2b13452 2234 struct ieee80211_bss *bss;
98c8fccf 2235 struct ieee80211_channel *channel;
56007a02
JB		 2236 bool need_ps = false;
2237
66e67e41 2238 if (sdata->u.mgd.associated &&
b203ca39 2239 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2240 bss = (void *)sdata->u.mgd.associated->priv;
2241 /* not previously set so we may need to recalc */
2242 need_ps = !bss->dtim_period;
2243 }
98c8fccf
JB		 2244
2245 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2246 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2247 rx_status->band);
98c8fccf
JB		 2248 else
2249 freq = rx_status->freq;
2250
2251 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2252
2253 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2254 return;
2255
98c8fccf 2256 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2257 channel, beacon);
77fdaa12
JB		 2258 if (bss)
2259 ieee80211_rx_bss_put(local, bss);
2260
2261 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2262 return;
2263
56007a02
JB		 2264 if (need_ps) {
2265 mutex_lock(&local->iflist_mtx);
2266 ieee80211_recalc_ps(local, -1);
2267 mutex_unlock(&local->iflist_mtx);
2268 }
2269
5bc1420b
JB		 2270 if (elems->ch_switch_ie &&
2271 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2272 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2273 bss, rx_status->mactime);
f0706e82
JB		 2274}
2275
2276
f698d856 2277static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2278 struct sk_buff *skb)
f0706e82 2279{
af6b6374 2280 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2281 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2282 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2283 size_t baselen, len = skb->len;
ae6a44e3
EK		 2284 struct ieee802_11_elems elems;
2285
15b7b062
KV		 2286 ifmgd = &sdata->u.mgd;
2287
77fdaa12
JB		 2288 ASSERT_MGD_MTX(ifmgd);
2289
b203ca39 2290 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2291 return; /* ignore ProbeResp to foreign address */
2292
ae6a44e3
EK		 2293 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2294 if (baselen > len)
2295 return;
2296
2297 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2298 &elems);
2299
98c8fccf 2300 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2301
77fdaa12 2302 if (ifmgd->associated &&
b203ca39 2303 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2304 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2305
2306 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2307 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2308 /* got probe response, continue with auth */
bdcbd8e0 2309 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2310 ifmgd->auth_data->tries = 0;
2311 ifmgd->auth_data->timeout = jiffies;
2312 run_again(ifmgd, ifmgd->auth_data->timeout);
2313 }
f0706e82
JB		 2314}
2315
d91f36db
JB		 2316/*
2317 * This is the canonical list of information elements we care about,
2318 * the filter code also gives us all changes to the Microsoft OUI
2319 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2320 *
2321 * We implement beacon filtering in software since that means we can
2322 * avoid processing the frame here and in cfg80211, and userspace
2323 * will not be able to tell whether the hardware supports it or not.
2324 *
2325 * XXX: This list needs to be dynamic -- userspace needs to be able to
2326 * add items it requires. It also needs to be able to tell us to
2327 * look out for other vendor IEs.
2328 */
2329static const u64 care_about_ies =
1d4df3a5
JB		 2330 (1ULL << WLAN_EID_COUNTRY) |
2331 (1ULL << WLAN_EID_ERP_INFO) |
2332 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2333 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2334 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2335 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2336
f698d856 2337static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2338 struct ieee80211_mgmt *mgmt,
2339 size_t len,
2340 struct ieee80211_rx_status *rx_status)
2341{
d91f36db 2342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2343 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2344 size_t baselen;
2345 struct ieee802_11_elems elems;
f698d856 2346 struct ieee80211_local *local = sdata->local;
471b3efd 2347 u32 changed = 0;
d91f36db 2348 bool erp_valid, directed_tim = false;
7a5158ef 2349 u8 erp_value = 0;
d91f36db 2350 u32 ncrc;
77fdaa12
JB		 2351 u8 *bssid;
2352
66e67e41 2353 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2354
ae6a44e3
EK		 2355 /* Process beacon from the current BSS */
2356 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2357 if (baselen > len)
2358 return;
2359
568d6e28 2360 if (rx_status->freq != local->oper_channel->center_freq)
f0706e82 2361 return;
f0706e82 2362
66e67e41 2363 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2364 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2365 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2366 len - baselen, &elems);
77fdaa12 2367
66e67e41
JB		 2368 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2369 false);
2370 ifmgd->assoc_data->have_beacon = true;
2371 ifmgd->assoc_data->sent_assoc = false;
2372 /* continue assoc process */
2373 ifmgd->assoc_data->timeout = jiffies;
2374 run_again(ifmgd, ifmgd->assoc_data->timeout);
2375 return;
2376 }
77fdaa12 2377
66e67e41 2378 if (!ifmgd->associated ||
b203ca39 2379 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2380 return;
66e67e41 2381 bssid = ifmgd->associated->bssid;
f0706e82 2382
17e4ec14
JM		 2383 /* Track average RSSI from the Beacon frames of the current AP */
2384 ifmgd->last_beacon_signal = rx_status->signal;
2385 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2386 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2387 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2388 ifmgd->last_cqm_event_signal = 0;
391a200a 2389 ifmgd->count_beacon_signal = 1;
615f7b9b 2390 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2391 } else {
2392 ifmgd->ave_beacon_signal =
2393 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2394 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2395 ifmgd->ave_beacon_signal) / 16;
391a200a 2396 ifmgd->count_beacon_signal++;
17e4ec14 2397 }
615f7b9b
MV		 2398
2399 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2400 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2401 int sig = ifmgd->ave_beacon_signal;
2402 int last_sig = ifmgd->last_ave_beacon_signal;
2403
2404 /*
2405 * if signal crosses either of the boundaries, invoke callback
2406 * with appropriate parameters
2407 */
2408 if (sig > ifmgd->rssi_max_thold &&
2409 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2410 ifmgd->last_ave_beacon_signal = sig;
2411 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2412 } else if (sig < ifmgd->rssi_min_thold &&
2413 (last_sig >= ifmgd->rssi_max_thold ||
2414 last_sig == 0)) {
2415 ifmgd->last_ave_beacon_signal = sig;
2416 drv_rssi_callback(local, RSSI_EVENT_LOW);
2417 }
2418 }
2419
17e4ec14 2420 if (bss_conf->cqm_rssi_thold &&
391a200a 2421 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2422 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2423 int sig = ifmgd->ave_beacon_signal / 16;
2424 int last_event = ifmgd->last_cqm_event_signal;
2425 int thold = bss_conf->cqm_rssi_thold;
2426 int hyst = bss_conf->cqm_rssi_hyst;
2427 if (sig < thold &&
2428 (last_event == 0 || sig < last_event - hyst)) {
2429 ifmgd->last_cqm_event_signal = sig;
2430 ieee80211_cqm_rssi_notify(
2431 &sdata->vif,
2432 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2433 GFP_KERNEL);
2434 } else if (sig > thold &&
2435 (last_event == 0 || sig > last_event + hyst)) {
2436 ifmgd->last_cqm_event_signal = sig;
2437 ieee80211_cqm_rssi_notify(
2438 &sdata->vif,
2439 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2440 GFP_KERNEL);
2441 }
2442 }
2443
b291ba11 2444 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2445 mlme_dbg_ratelimited(sdata,
2446 "cancelling probereq poll due to a received beacon\n");
925e64c3 2447 mutex_lock(&local->mtx);
b291ba11 2448 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2449 ieee80211_run_deferred_scan(local);
2450 mutex_unlock(&local->mtx);
2451
4e751843
JB		 2452 mutex_lock(&local->iflist_mtx);
2453 ieee80211_recalc_ps(local, -1);
2454 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2455 }
2456
b291ba11
JB		 2457 /*
2458 * Push the beacon loss detection into the future since
2459 * we are processing a beacon from the AP just now.
2460 */
d3a910a8 2461 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2462
d91f36db
JB		 2463 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2464 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2465 len - baselen, &elems,
2466 care_about_ies, ncrc);
2467
2468 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2469 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2470 ifmgd->aid);
d91f36db 2471
25c9c875 2472 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2473 if (directed_tim) {
572e0012 2474 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2475 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2476 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2477 ieee80211_hw_config(local,
2478 IEEE80211_CONF_CHANGE_PS);
2479 }
572e0012 2480 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2481 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2482 local->pspolling = true;
2483
2484 /*
2485 * Here is assumed that the driver will be
2486 * able to send ps-poll frame and receive a
2487 * response even though power save mode is
2488 * enabled, but some drivers might require
2489 * to disable power save here. This needs
2490 * to be investigated.
2491 */
2492 ieee80211_send_pspoll(local, sdata);
2493 }
a97b77b9
VN		 2494 }
2495 }
7a5158ef 2496
d8ec4433 2497 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2498 return;
2499 ifmgd->beacon_crc = ncrc;
d8ec4433 2500 ifmgd->beacon_crc_valid = true;
30196673 2501
7d25745d
JB		 2502 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2503 true);
2504
2505 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2506 elems.wmm_param_len))
2507 changed |= BSS_CHANGED_QOS;
2508
7a5158ef
JB		 2509 if (elems.erp_info && elems.erp_info_len >= 1) {
2510 erp_valid = true;
2511 erp_value = elems.erp_info[0];
2512 } else {
2513 erp_valid = false;
50c4afb9 2514 }
7a5158ef
JB		 2515 changed |= ieee80211_handle_bss_capability(sdata,
2516 le16_to_cpu(mgmt->u.beacon.capab_info),
2517 erp_valid, erp_value);
f0706e82 2518
d3c990fb 2519
074d46d1 2520 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2521 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2522 struct ieee80211_supported_band *sband;
ae5eb026 2523
568d6e28 2524 sband = local->hw.wiphy->bands[local->oper_channel->band];
ae5eb026 2525
24398e39
JB		 2526 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2527 bssid, true);
d3c990fb
RR		 2528 }
2529
8b19e6ca 2530 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2531 if (elems.country_elem) {
a8302de9
VT		 2532 /* TODO: IBSS also needs this */
2533 if (elems.pwr_constr_elem)
2534 ieee80211_handle_pwr_constr(sdata,
2535 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2536 elems.pwr_constr_elem,
2537 elems.pwr_constr_elem_len);
3f2355cb
LR		 2538 }
2539
471b3efd 2540 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2541}
2542
1fa57d01
JB		 2543void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2544 struct sk_buff *skb)
f0706e82 2545{
77fdaa12 2546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2547 struct ieee80211_rx_status *rx_status;
f0706e82 2548 struct ieee80211_mgmt *mgmt;
66e67e41 2549 struct cfg80211_bss *bss = NULL;
77fdaa12 2550 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2551 u16 fc;
2552
f0706e82
JB		 2553 rx_status = (struct ieee80211_rx_status *) skb->cb;
2554 mgmt = (struct ieee80211_mgmt *) skb->data;
2555 fc = le16_to_cpu(mgmt->frame_control);
2556
77fdaa12
JB		 2557 mutex_lock(&ifmgd->mtx);
2558
66e67e41
JB		 2559 switch (fc & IEEE80211_FCTL_STYPE) {
2560 case IEEE80211_STYPE_BEACON:
2561 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2562 break;
2563 case IEEE80211_STYPE_PROBE_RESP:
2564 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2565 break;
2566 case IEEE80211_STYPE_AUTH:
2567 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2568 break;
2569 case IEEE80211_STYPE_DEAUTH:
2570 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2571 break;
2572 case IEEE80211_STYPE_DISASSOC:
2573 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2574 break;
2575 case IEEE80211_STYPE_ASSOC_RESP:
2576 case IEEE80211_STYPE_REASSOC_RESP:
2577 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2578 break;
2579 case IEEE80211_STYPE_ACTION:
2580 switch (mgmt->u.action.category) {
2581 case WLAN_CATEGORY_SPECTRUM_MGMT:
2582 ieee80211_sta_process_chanswitch(sdata,
2583 &mgmt->u.action.u.chan_switch.sw_elem,
2584 (void *)ifmgd->associated->priv,
2585 rx_status->mactime);
77fdaa12 2586 break;
77fdaa12 2587 }
77fdaa12 2588 }
77fdaa12
JB		 2589 mutex_unlock(&ifmgd->mtx);
2590
66e67e41
JB		 2591 switch (rma) {
2592 case RX_MGMT_NONE:
2593 /* no action */
2594 break;
2595 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2596 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2597 break;
2598 case RX_MGMT_CFG80211_DISASSOC:
2599 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2600 break;
2601 case RX_MGMT_CFG80211_RX_AUTH:
2602 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2603 break;
2604 case RX_MGMT_CFG80211_RX_ASSOC:
2605 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2606 break;
2607 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2608 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2609 break;
2610 default:
2611 WARN(1, "unexpected: %d", rma);
b054b747 2612 }
f0706e82
JB		 2613}
2614
9c6bd790 2615static void ieee80211_sta_timer(unsigned long data)
f0706e82 2616{
60f8b39c
JB		 2617 struct ieee80211_sub_if_data *sdata =
2618 (struct ieee80211_sub_if_data *) data;
46900298 2619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2620 struct ieee80211_local *local = sdata->local;
f0706e82 2621
5bb644a0
JB		 2622 if (local->quiescing) {
2623 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2624 return;
2625 }
2626
64592c8f 2627 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2628}
2629
04ac3c0e 2630static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2631 u8 *bssid, u8 reason)
04ac3c0e
FF		 2632{
2633 struct ieee80211_local *local = sdata->local;
2634 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2635 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2636
37ad3888
JB		 2637 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2638 false, frame_buf);
04ac3c0e 2639 mutex_unlock(&ifmgd->mtx);
37ad3888 2640
04ac3c0e
FF		 2641 /*
2642 * must be outside lock due to cfg80211,
2643 * but that's not a problem.
2644 */
5fef7dbc 2645 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2646
2647 mutex_lock(&local->mtx);
2648 ieee80211_recalc_idle(local);
2649 mutex_unlock(&local->mtx);
2650
04ac3c0e
FF		 2651 mutex_lock(&ifmgd->mtx);
2652}
2653
66e67e41
JB		 2654static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2655{
2656 struct ieee80211_local *local = sdata->local;
2657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2658 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2659
2660 lockdep_assert_held(&ifmgd->mtx);
2661
2662 if (WARN_ON_ONCE(!auth_data))
2663 return -EINVAL;
2664
66e67e41
JB		 2665 auth_data->tries++;
2666
2667 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2668 sdata_info(sdata, "authentication with %pM timed out\n",
2669 auth_data->bss->bssid);
66e67e41
JB		 2670
2671 /*
2672 * Most likely AP is not in the range so remove the
2673 * bss struct for that AP.
2674 */
2675 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2676
2677 return -ETIMEDOUT;
2678 }
2679
a1845fc7
JB		 2680 drv_mgd_prepare_tx(local, sdata);
2681
66e67e41 2682 if (auth_data->bss->proberesp_ies) {
bdcbd8e0
JB		 2683 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2684 auth_data->bss->bssid, auth_data->tries,
2685 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2686
2687 auth_data->expected_transaction = 2;
2688 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2689 auth_data->ie, auth_data->ie_len,
2690 auth_data->bss->bssid,
2691 auth_data->bss->bssid, NULL, 0, 0);
2692 } else {
2693 const u8 *ssidie;
2694
bdcbd8e0
JB		 2695 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2696 auth_data->bss->bssid, auth_data->tries,
2697 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2698
2699 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2700 if (!ssidie)
2701 return -EINVAL;
2702 /*
2703 * Direct probe is sent to broadcast address as some APs
2704 * will not answer to direct packet in unassociated state.
2705 */
2706 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2707 NULL, 0, (u32) -1, true, false);
2708 }
2709
2710 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2711 run_again(ifmgd, auth_data->timeout);
2712
2713 return 0;
2714}
2715
2716static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2717{
2718 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2719 struct ieee80211_local *local = sdata->local;
2720
2721 lockdep_assert_held(&sdata->u.mgd.mtx);
2722
66e67e41
JB		 2723 assoc_data->tries++;
2724 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2725 sdata_info(sdata, "association with %pM timed out\n",
2726 assoc_data->bss->bssid);
66e67e41
JB		 2727
2728 /*
2729 * Most likely AP is not in the range so remove the
2730 * bss struct for that AP.
2731 */
2732 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2733
2734 return -ETIMEDOUT;
2735 }
2736
bdcbd8e0
JB		 2737 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2738 assoc_data->bss->bssid, assoc_data->tries,
2739 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2740 ieee80211_send_assoc(sdata);
2741
2742 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2743 run_again(&sdata->u.mgd, assoc_data->timeout);
2744
2745 return 0;
2746}
2747
1fa57d01 2748void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2749{
9c6bd790 2750 struct ieee80211_local *local = sdata->local;
1fa57d01 2751 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2752
77fdaa12
JB		 2753 mutex_lock(&ifmgd->mtx);
2754
66e67e41
JB		 2755 if (ifmgd->auth_data &&
2756 time_after(jiffies, ifmgd->auth_data->timeout)) {
2757 if (ifmgd->auth_data->done) {
2758 /*
2759 * ok ... we waited for assoc but userspace didn't,
2760 * so let's just kill the auth data
2761 */
2762 ieee80211_destroy_auth_data(sdata, false);
2763 } else if (ieee80211_probe_auth(sdata)) {
2764 u8 bssid[ETH_ALEN];
2765
2766 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2767
2768 ieee80211_destroy_auth_data(sdata, false);
2769
2770 mutex_unlock(&ifmgd->mtx);
2771 cfg80211_send_auth_timeout(sdata->dev, bssid);
2772 mutex_lock(&ifmgd->mtx);
2773 }
2774 } else if (ifmgd->auth_data)
2775 run_again(ifmgd, ifmgd->auth_data->timeout);
2776
2777 if (ifmgd->assoc_data &&
2778 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2779 if (!ifmgd->assoc_data->have_beacon ||
2780 ieee80211_do_assoc(sdata)) {
2781 u8 bssid[ETH_ALEN];
2782
2783 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2784
2785 ieee80211_destroy_assoc_data(sdata, false);
2786
2787 mutex_unlock(&ifmgd->mtx);
2788 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2789 mutex_lock(&ifmgd->mtx);
2790 }
2791 } else if (ifmgd->assoc_data)
2792 run_again(ifmgd, ifmgd->assoc_data->timeout);
2793
b291ba11
JB		 2794 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2795 IEEE80211_STA_CONNECTION_POLL) &&
2796 ifmgd->associated) {
a43abf29 2797 u8 bssid[ETH_ALEN];
72a8a3ed 2798 int max_tries;
a43abf29 2799
0c1ad2ca 2800 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2801
72a8a3ed 2802 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2803 max_tries = max_nullfunc_tries;
72a8a3ed 2804 else
180205bd 2805 max_tries = max_probe_tries;
72a8a3ed 2806
4e5ff376
FF		 2807 /* ACK received for nullfunc probing frame */
2808 if (!ifmgd->probe_send_count)
2809 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2810 else if (ifmgd->nullfunc_failed) {
2811 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2812 mlme_dbg(sdata,
2813 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2814 bssid, ifmgd->probe_send_count,
2815 max_tries);
04ac3c0e
FF		 2816 ieee80211_mgd_probe_ap_send(sdata);
2817 } else {
bdcbd8e0
JB		 2818 mlme_dbg(sdata,
2819 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2820 bssid);
95acac61
JB		 2821 ieee80211_sta_connection_lost(sdata, bssid,
2822 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2823 }
2824 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2825 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2826 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2827 mlme_dbg(sdata,
2828 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2829 bssid, probe_wait_ms);
95acac61
JB		 2830 ieee80211_sta_connection_lost(sdata, bssid,
2831 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2832 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2833 mlme_dbg(sdata,
2834 "No probe response from AP %pM after %dms, try %d/%i\n",
2835 bssid, probe_wait_ms,
2836 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2837 ieee80211_mgd_probe_ap_send(sdata);
2838 } else {
b291ba11
JB		 2839 /*
2840 * We actually lost the connection ... or did we?
2841 * Let's make sure!
2842 */
b38afa87
BG		 2843 wiphy_debug(local->hw.wiphy,
2844 "%s: No probe response from AP %pM"
2845 " after %dms, disconnecting.\n",
2846 sdata->name,
180205bd 2847 bssid, probe_wait_ms);
04ac3c0e 2848
95acac61
JB		 2849 ieee80211_sta_connection_lost(sdata, bssid,
2850 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2851 }
2852 }
2853
77fdaa12 2854 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2855
2856 mutex_lock(&local->mtx);
2857 ieee80211_recalc_idle(local);
2858 mutex_unlock(&local->mtx);
f0706e82
JB		 2859}
2860
b291ba11
JB		 2861static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2862{
2863 struct ieee80211_sub_if_data *sdata =
2864 (struct ieee80211_sub_if_data *) data;
2865 struct ieee80211_local *local = sdata->local;
2866
2867 if (local->quiescing)
2868 return;
2869
1e4dcd01
JO		 2870 ieee80211_queue_work(&sdata->local->hw,
2871 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2872}
2873
2874static void ieee80211_sta_conn_mon_timer(unsigned long data)
2875{
2876 struct ieee80211_sub_if_data *sdata =
2877 (struct ieee80211_sub_if_data *) data;
2878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2879 struct ieee80211_local *local = sdata->local;
2880
2881 if (local->quiescing)
2882 return;
2883
42935eca 2884 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2885}
2886
2887static void ieee80211_sta_monitor_work(struct work_struct *work)
2888{
2889 struct ieee80211_sub_if_data *sdata =
2890 container_of(work, struct ieee80211_sub_if_data,
2891 u.mgd.monitor_work);
2892
2893 ieee80211_mgd_probe_ap(sdata, false);
2894}
2895
9c6bd790
JB		 2896static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2897{
494f1fe5
EP		 2898 u32 flags;
2899
ad935687 2900 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2901 __ieee80211_stop_poll(sdata);
ad935687 2902
b291ba11 2903 /* let's probe the connection once */
494f1fe5
EP		 2904 flags = sdata->local->hw.flags;
2905 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2906 ieee80211_queue_work(&sdata->local->hw,
2907 &sdata->u.mgd.monitor_work);
b291ba11 2908 /* and do all the other regular work too */
64592c8f 2909 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2910 }
9c6bd790 2911}
f0706e82 2912
5bb644a0
JB		 2913#ifdef CONFIG_PM
2914void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2915{
2916 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2917
2918 /*
2919 * we need to use atomic bitops for the running bits
2920 * only because both timers might fire at the same
2921 * time -- the code here is properly synchronised.
2922 */
2923
d1f5b7a3
JB		 2924 cancel_work_sync(&ifmgd->request_smps_work);
2925
0ecfe806 2926 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2927 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2928 if (del_timer_sync(&ifmgd->timer))
2929 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2930
2931 cancel_work_sync(&ifmgd->chswitch_work);
2932 if (del_timer_sync(&ifmgd->chswitch_timer))
2933 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2934
b291ba11
JB		 2935 /* these will just be re-established on connection */
2936 del_timer_sync(&ifmgd->conn_mon_timer);
2937 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2938}
2939
2940void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2941{
2942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2943
676b58c2
RM		 2944 if (!ifmgd->associated)
2945 return;
2946
95acac61
JB		 2947 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2948 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2949 mutex_lock(&ifmgd->mtx);
2950 if (ifmgd->associated) {
bdcbd8e0
JB		 2951 mlme_dbg(sdata,
2952 "driver requested disconnect after resume\n");
95acac61
JB		 2953 ieee80211_sta_connection_lost(sdata,
2954 ifmgd->associated->bssid,
2955 WLAN_REASON_UNSPECIFIED);
2956 mutex_unlock(&ifmgd->mtx);
2957 return;
2958 }
2959 mutex_unlock(&ifmgd->mtx);
2960 }
2961
5bb644a0
JB		 2962 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2963 add_timer(&ifmgd->timer);
2964 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2965 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2966 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2967
2968 mutex_lock(&sdata->local->mtx);
46090979 2969 ieee80211_restart_sta_timer(sdata);
925e64c3 2970 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2971}
2972#endif
2973
9c6bd790
JB		 2974/* interface setup */
2975void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2976{
46900298 2977 struct ieee80211_if_managed *ifmgd;
988c0f72 2978
46900298 2979 ifmgd = &sdata->u.mgd;
b291ba11 2980 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2981 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2982 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2983 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2984 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2985 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2986 (unsigned long) sdata);
b291ba11
JB		 2987 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2988 (unsigned long) sdata);
2989 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2990 (unsigned long) sdata);
46900298 2991 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2992 (unsigned long) sdata);
9c6bd790 2993
ab1faead 2994 ifmgd->flags = 0;
1478acb3 2995 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2996 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2997 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2998
77fdaa12 2999 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3000
3001 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3002 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3003 else
3004 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3005}
3006
77fdaa12
JB		 3007/* scan finished notification */
3008void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3009{
31ee67a1 3010 struct ieee80211_sub_if_data *sdata;
60f8b39c 3011
77fdaa12
JB		 3012 /* Restart STA timers */
3013 rcu_read_lock();
3014 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3015 ieee80211_restart_sta_timer(sdata);
3016 rcu_read_unlock();
3017}
60f8b39c 3018
77fdaa12
JB		 3019int ieee80211_max_network_latency(struct notifier_block *nb,
3020 unsigned long data, void *dummy)
3021{
3022 s32 latency_usec = (s32) data;
3023 struct ieee80211_local *local =
3024 container_of(nb, struct ieee80211_local,
3025 network_latency_notifier);
1fa6f4af 3026
77fdaa12
JB		 3027 mutex_lock(&local->iflist_mtx);
3028 ieee80211_recalc_ps(local, latency_usec);
3029 mutex_unlock(&local->iflist_mtx);
dfe67012 3030
77fdaa12 3031 return 0;
9c6bd790
JB		 3032}
3033
b17166a7
JB		 3034static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3035 struct cfg80211_bss *cbss)
a1cf775d
JB		 3036{
3037 struct ieee80211_local *local = sdata->local;
3038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39
JB		 3039 int ht_cfreq;
3040 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3041 const u8 *ht_oper_ie;
3042 const struct ieee80211_ht_operation *ht_oper = NULL;
3043 struct ieee80211_supported_band *sband;
a1cf775d 3044
24398e39
JB		 3045 sband = local->hw.wiphy->bands[cbss->channel->band];
3046
3047 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3048
3049 if (sband->ht_cap.ht_supported) {
3050 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3051 cbss->information_elements,
3052 cbss->len_information_elements);
3053 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3054 ht_oper = (void *)(ht_oper_ie + 2);
3055 }
3056
3057 if (ht_oper) {
3058 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3059 cbss->channel->band);
3060 /* check that channel matches the right operating channel */
3061 if (cbss->channel->center_freq != ht_cfreq) {
3062 /*
3063 * It's possible that some APs are confused here;
3064 * Netgear WNDR3700 sometimes reports 4 higher than
3065 * the actual channel in association responses, but
3066 * since we look at probe response/beacon data here
3067 * it should be OK.
3068 */
bdcbd8e0
JB		 3069 sdata_info(sdata,
3070 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3071 cbss->channel->center_freq,
3072 ht_cfreq, ht_oper->primary_chan,
3073 cbss->channel->band);
24398e39
JB		 3074 ht_oper = NULL;
3075 }
3076 }
3077
3078 if (ht_oper) {
3079 channel_type = NL80211_CHAN_HT20;
3080
3081 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3082 switch (ht_oper->ht_param &
3083 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3084 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3085 channel_type = NL80211_CHAN_HT40PLUS;
3086 break;
3087 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3088 channel_type = NL80211_CHAN_HT40MINUS;
3089 break;
3090 }
3091 }
3092 }
3093
3094 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3095 /* can only fail due to HT40+/- mismatch */
3096 channel_type = NL80211_CHAN_HT20;
bdcbd8e0
JB		 3097 sdata_info(sdata,
3098 "disabling 40 MHz due to multi-vif mismatch\n");
24398e39
JB		 3099 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3100 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3101 channel_type));
3102 }
3103
5d6a1b06 3104 local->oper_channel = cbss->channel;
6aee4ca3 3105 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
a1cf775d 3106
b17166a7
JB		 3107 return 0;
3108}
3109
3110static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3111 struct cfg80211_bss *cbss, bool assoc)
3112{
3113 struct ieee80211_local *local = sdata->local;
3114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3115 struct ieee80211_bss *bss = (void *)cbss->priv;
3116 struct sta_info *new_sta = NULL;
3117 bool have_sta = false;
3118 int err;
3119
3120 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3121 return -EINVAL;
3122
3123 if (assoc) {
3124 rcu_read_lock();
3125 have_sta = sta_info_get(sdata, cbss->bssid);
3126 rcu_read_unlock();
3127 }
3128
3129 if (!have_sta) {
3130 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3131 if (!new_sta)
3132 return -ENOMEM;
3133 }
3134
3135 mutex_lock(&local->mtx);
3136 ieee80211_recalc_idle(sdata->local);
3137 mutex_unlock(&local->mtx);
3138
13e0c8e3 3139 if (new_sta) {
5d6a1b06
JB		 3140 u32 rates = 0, basic_rates = 0;
3141 bool have_higher_than_11mbit;
3142 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3143 struct ieee80211_supported_band *sband;
3144
3145 sband = local->hw.wiphy->bands[cbss->channel->band];
3146
3147 err = ieee80211_prep_channel(sdata, cbss);
3148 if (err) {
3149 sta_info_free(local, new_sta);
3150 return err;
3151 }
5d6a1b06 3152
5d6a1b06
JB		 3153 ieee80211_get_rates(sband, bss->supp_rates,
3154 bss->supp_rates_len,
3155 &rates, &basic_rates,
3156 &have_higher_than_11mbit,
3157 &min_rate, &min_rate_index);
3158
3159 /*
3160 * This used to be a workaround for basic rates missing
3161 * in the association response frame. Now that we no
3162 * longer use the basic rates from there, it probably
3163 * doesn't happen any more, but keep the workaround so
3164 * in case some *other* APs are buggy in different ways
3165 * we can connect -- with a warning.
3166 */
3167 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3168 sdata_info(sdata,
3169 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3170 basic_rates = BIT(min_rate_index);
3171 }
3172
13e0c8e3 3173 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3174 sdata->vif.bss_conf.basic_rates = basic_rates;
3175
3176 /* cf. IEEE 802.11 9.2.12 */
3177 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3178 have_higher_than_11mbit)
3179 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3180 else
3181 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3182
3183 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3184
8c358bcd
JB		 3185 /* set timing information */
3186 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3187 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3188 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3189
3190 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3191 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3192 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3193 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3194
3195 if (assoc)
13e0c8e3 3196 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3197
13e0c8e3
JB		 3198 err = sta_info_insert(new_sta);
3199 new_sta = NULL;
a1cf775d 3200 if (err) {
bdcbd8e0
JB		 3201 sdata_info(sdata,
3202 "failed to insert STA entry for the AP (error %d)\n",
3203 err);
a1cf775d
JB		 3204 return err;
3205 }
3206 } else
b203ca39 3207 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3208
3209 return 0;
3210}
3211
77fdaa12
JB		 3212/* config hooks */
3213int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3214 struct cfg80211_auth_request *req)
9c6bd790 3215{
66e67e41
JB		 3216 struct ieee80211_local *local = sdata->local;
3217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3218 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3219 u16 auth_alg;
66e67e41
JB		 3220 int err;
3221
3222 /* prepare auth data structure */
9c6bd790 3223
77fdaa12
JB		 3224 switch (req->auth_type) {
3225 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3226 auth_alg = WLAN_AUTH_OPEN;
3227 break;
3228 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3229 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3230 return -EOPNOTSUPP;
77fdaa12
JB		 3231 auth_alg = WLAN_AUTH_SHARED_KEY;
3232 break;
3233 case NL80211_AUTHTYPE_FT:
3234 auth_alg = WLAN_AUTH_FT;
3235 break;
3236 case NL80211_AUTHTYPE_NETWORK_EAP:
3237 auth_alg = WLAN_AUTH_LEAP;
3238 break;
3239 default:
3240 return -EOPNOTSUPP;
60f8b39c 3241 }
77fdaa12 3242
66e67e41
JB		 3243 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3244 if (!auth_data)
9c6bd790 3245 return -ENOMEM;
77fdaa12 3246
66e67e41 3247 auth_data->bss = req->bss;
77fdaa12
JB		 3248
3249 if (req->ie && req->ie_len) {
66e67e41
JB		 3250 memcpy(auth_data->ie, req->ie, req->ie_len);
3251 auth_data->ie_len = req->ie_len;
9c6bd790 3252 }
77fdaa12 3253
fffd0934 3254 if (req->key && req->key_len) {
66e67e41
JB		 3255 auth_data->key_len = req->key_len;
3256 auth_data->key_idx = req->key_idx;
3257 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3258 }
3259
66e67e41 3260 auth_data->algorithm = auth_alg;
60f8b39c 3261
66e67e41 3262 /* try to authenticate/probe */
2a33bee2 3263
66e67e41 3264 mutex_lock(&ifmgd->mtx);
2a33bee2 3265
66e67e41
JB		 3266 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3267 ifmgd->assoc_data) {
3268 err = -EBUSY;
3269 goto err_free;
2a33bee2
GE		 3270 }
3271
66e67e41
JB		 3272 if (ifmgd->auth_data)
3273 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3274
66e67e41
JB		 3275 /* prep auth_data so we don't go into idle on disassoc */
3276 ifmgd->auth_data = auth_data;
af6b6374 3277
66e67e41 3278 if (ifmgd->associated)
37ad3888 3279 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3280
bdcbd8e0 3281 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3282
a1cf775d
JB		 3283 err = ieee80211_prep_connection(sdata, req->bss, false);
3284 if (err)
66e67e41 3285 goto err_clear;
af6b6374 3286
66e67e41
JB		 3287 err = ieee80211_probe_auth(sdata);
3288 if (err) {
66e67e41
JB		 3289 sta_info_destroy_addr(sdata, req->bss->bssid);
3290 goto err_clear;
3291 }
3292
3293 /* hold our own reference */
3294 cfg80211_ref_bss(auth_data->bss);
3295 err = 0;
3296 goto out_unlock;
3297
3298 err_clear:
3299 ifmgd->auth_data = NULL;
3300 err_free:
3301 kfree(auth_data);
3302 out_unlock:
3303 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3304
66e67e41 3305 return err;
af6b6374
JB		 3306}
3307
77fdaa12
JB		 3308int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3309 struct cfg80211_assoc_request *req)
f0706e82 3310{
66e67e41 3311 struct ieee80211_local *local = sdata->local;
77fdaa12 3312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3313 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3314 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3315 struct ieee80211_supported_band *sband;
9dde6423 3316 const u8 *ssidie, *ht_ie;
2a33bee2 3317 int i, err;
f0706e82 3318
66e67e41
JB		 3319 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3320 if (!ssidie)
3321 return -EINVAL;
3322
3323 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3324 if (!assoc_data)
3325 return -ENOMEM;
3326
77fdaa12 3327 mutex_lock(&ifmgd->mtx);
9c87ba67 3328
66e67e41 3329 if (ifmgd->associated)
37ad3888 3330 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3331
3332 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3333 err = -EBUSY;
3334 goto err_free;
af6b6374 3335 }
77fdaa12 3336
66e67e41
JB		 3337 if (ifmgd->assoc_data) {
3338 err = -EBUSY;
3339 goto err_free;
3340 }
77fdaa12 3341
66e67e41
JB		 3342 if (ifmgd->auth_data) {
3343 bool match;
3344
3345 /* keep sta info, bssid if matching */
b203ca39 3346 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3347 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3348 }
3349
66e67e41 3350 /* prepare assoc data */
19c3b830
JB		 3351
3352 /*
3353 * keep only the 40 MHz disable bit set as it might have
3354 * been set during authentication already, all other bits
3355 * should be reset for a new connection
3356 */
3357 ifmgd->flags &= IEEE80211_STA_DISABLE_40MHZ;
77fdaa12 3358
d8ec4433
JO		 3359 ifmgd->beacon_crc_valid = false;
3360
de5036aa
JB		 3361 /*
3362 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3363 * We still associate in non-HT mode (11a/b/g) if any one of these
3364 * ciphers is configured as pairwise.
3365 * We can set this to true for non-11n hardware, that'll be checked
3366 * separately along with the peer capabilities.
3367 */
1c4cb928 3368 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3369 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3370 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3371 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3372 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba 3373 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3374 netdev_info(sdata->dev,
d545daba 3375 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3376 }
3377 }
77fdaa12 3378
d545daba 3379 if (req->flags & ASSOC_REQ_DISABLE_HT) {
ef96a842 3380 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba
MP		 3381 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3382 }
ef96a842 3383
4e74bfdb
JB		 3384 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3385 sband = local->hw.wiphy->bands[req->bss->channel->band];
3386 if (!sband->ht_cap.ht_supported ||
1c4cb928 3387 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3388 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1b49de26
JB		 3389 if (!bss->wmm_used)
3390 netdev_info(sdata->dev,
3391 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3392 }
4e74bfdb 3393
d545daba
MP		 3394 /* disable VHT if we don't support it or the AP doesn't use WMM */
3395 if (!sband->vht_cap.vht_supported ||
3396 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3397 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3398 if (!bss->wmm_used)
3399 netdev_info(sdata->dev,
3400 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3401 }
3402
ef96a842
BG		 3403 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3404 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3405 sizeof(ifmgd->ht_capa_mask));
3406
77fdaa12 3407 if (req->ie && req->ie_len) {
66e67e41
JB		 3408 memcpy(assoc_data->ie, req->ie, req->ie_len);
3409 assoc_data->ie_len = req->ie_len;
3410 }
f679f65d 3411
66e67e41 3412 assoc_data->bss = req->bss;
f679f65d 3413
af6b6374
JB		 3414 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3415 if (ifmgd->powersave)
3416 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3417 else
3418 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3419 } else
3420 ifmgd->ap_smps = ifmgd->req_smps;
3421
66e67e41 3422 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3423 assoc_data->wmm = bss->wmm_used &&
3424 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3425 assoc_data->supp_rates = bss->supp_rates;
3426 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3427
3428 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3429 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3430 assoc_data->ap_ht_param =
3431 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3432 else
3433 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3434
ab13315a
KV		 3435 if (bss->wmm_used && bss->uapsd_supported &&
3436 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3437 assoc_data->uapsd = true;
ab13315a
KV		 3438 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3439 } else {
76f0303d 3440 assoc_data->uapsd = false;
ab13315a
KV		 3441 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3442 }
3443
66e67e41
JB		 3444 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3445 assoc_data->ssid_len = ssidie[1];
63f170e0 3446
77fdaa12 3447 if (req->prev_bssid)
66e67e41 3448 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3449
3450 if (req->use_mfp) {
3451 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3452 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3453 } else {
3454 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3455 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3456 }
3457
3458 if (req->crypto.control_port)
3459 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3460 else
3461 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3462
a621fa4d
JB		 3463 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3464 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3465
66e67e41
JB		 3466 /* kick off associate process */
3467
3468 ifmgd->assoc_data = assoc_data;
3469
a1cf775d
JB		 3470 err = ieee80211_prep_connection(sdata, req->bss, true);
3471 if (err)
3472 goto err_clear;
66e67e41
JB		 3473
3474 if (!bss->dtim_period &&
3475 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3476 /*
3477 * Wait up to one beacon interval ...
3478 * should this be more if we miss one?
3479 */
bdcbd8e0
JB		 3480 sdata_info(sdata, "waiting for beacon from %pM\n",
3481 ifmgd->bssid);
3f9768a5 3482 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3483 } else {
3484 assoc_data->have_beacon = true;
3485 assoc_data->sent_assoc = false;
3486 assoc_data->timeout = jiffies;
3487 }
3488 run_again(ifmgd, assoc_data->timeout);
3489
fcff4f10
PS		 3490 if (bss->corrupt_data) {
3491 char *corrupt_type = "data";
3492 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3493 if (bss->corrupt_data &
3494 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3495 corrupt_type = "beacon and probe response";
3496 else
3497 corrupt_type = "beacon";
3498 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3499 corrupt_type = "probe response";
bdcbd8e0
JB		 3500 sdata_info(sdata, "associating with AP with corrupt %s\n",
3501 corrupt_type);
fcff4f10
PS		 3502 }
3503
66e67e41
JB		 3504 err = 0;
3505 goto out;
3506 err_clear:
3507 ifmgd->assoc_data = NULL;
3508 err_free:
3509 kfree(assoc_data);
3510 out:
3511 mutex_unlock(&ifmgd->mtx);
3512
3513 return err;
f0706e82
JB		 3514}
3515
77fdaa12 3516int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3517 struct cfg80211_deauth_request *req)
f0706e82 3518{
46900298 3519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3520 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3521
77fdaa12
JB		 3522 mutex_lock(&ifmgd->mtx);
3523
37ad3888 3524 if (ifmgd->auth_data) {
66e67e41 3525 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3526 mutex_unlock(&ifmgd->mtx);
66e67e41 3527 return 0;
af6b6374 3528 }
77fdaa12 3529
bdcbd8e0
JB		 3530 sdata_info(sdata,
3531 "deauthenticating from %pM by local choice (reason=%d)\n",
3532 req->bssid, req->reason_code);
0ff71613 3533
37ad3888 3534 if (ifmgd->associated &&
8c7d857c 3535 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
37ad3888 3536 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3537 req->reason_code, true, frame_buf);
8c7d857c
EG		 3538 } else {
3539 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 3540 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3541 IEEE80211_STYPE_DEAUTH,
3542 req->reason_code, true,
3543 frame_buf);
8c7d857c
EG		 3544 }
3545
37ad3888
JB		 3546 mutex_unlock(&ifmgd->mtx);
3547
5fef7dbc 3548 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3549
7da7cc1d 3550 mutex_lock(&sdata->local->mtx);
bc83b681 3551 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3552 mutex_unlock(&sdata->local->mtx);
bc83b681 3553
f0706e82
JB		 3554 return 0;
3555}
84363e6e 3556
77fdaa12 3557int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3558 struct cfg80211_disassoc_request *req)
9c6bd790 3559{
77fdaa12 3560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3561 u8 bssid[ETH_ALEN];
5fef7dbc 3562 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3563
77fdaa12 3564 mutex_lock(&ifmgd->mtx);
10f644a4 3565
8d8b261a
JB		 3566 /*
3567 * cfg80211 should catch this ... but it's racy since
3568 * we can receive a disassoc frame, process it, hand it
3569 * to cfg80211 while that's in a locked section already
3570 * trying to tell us that the user wants to disconnect.
3571 */
0c1ad2ca 3572 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3573 mutex_unlock(&ifmgd->mtx);
3574 return -ENOLINK;
3575 }
3576
bdcbd8e0
JB		 3577 sdata_info(sdata,
3578 "disassociating from %pM by local choice (reason=%d)\n",
3579 req->bss->bssid, req->reason_code);
0ff71613 3580
e69e95db 3581 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3582 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3583 req->reason_code, !req->local_state_change,
3584 frame_buf);
77fdaa12 3585 mutex_unlock(&ifmgd->mtx);
10f644a4 3586
5fef7dbc 3587 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3588
7da7cc1d 3589 mutex_lock(&sdata->local->mtx);
bc83b681 3590 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3591 mutex_unlock(&sdata->local->mtx);
bc83b681 3592
10f644a4
JB		 3593 return 0;
3594}
026331c4 3595
afa762f6 3596void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3597{
3598 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3599
3600 mutex_lock(&ifmgd->mtx);
3601 if (ifmgd->assoc_data)
3602 ieee80211_destroy_assoc_data(sdata, false);
3603 if (ifmgd->auth_data)
3604 ieee80211_destroy_auth_data(sdata, false);
3605 del_timer_sync(&ifmgd->timer);
3606 mutex_unlock(&ifmgd->mtx);
3607}
3608
a97c13c3
JO		 3609void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3610 enum nl80211_cqm_rssi_threshold_event rssi_event,
3611 gfp_t gfp)
3612{
3613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3614
b5878a2d
JB		 3615 trace_api_cqm_rssi_notify(sdata, rssi_event);
3616
a97c13c3
JO		 3617 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3618}
3619EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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