]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blame - net/mac80211/mlme.c
projects / mirror_ubuntu-zesty-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: move TX station pointer and restructure TX
[mirror_ubuntu-zesty-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
JB		 187
188 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
d5522e03 189
64f68e5d
JB		 190 switch (sdata->vif.bss_conf.channel_type) {
191 case NL80211_CHAN_HT40PLUS:
192 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
193 disable_40 = true;
194 break;
195 case NL80211_CHAN_HT40MINUS:
196 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
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
cc32abd4
JB		 715 ieee80211_wake_queues_by_reason(&sdata->local->hw,
716 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 717 out:
718 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
719 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 720}
721
5ce6e438
JB		 722void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
723{
724 struct ieee80211_sub_if_data *sdata;
725 struct ieee80211_if_managed *ifmgd;
726
727 sdata = vif_to_sdata(vif);
728 ifmgd = &sdata->u.mgd;
729
730 trace_api_chswitch_done(sdata, success);
731 if (!success) {
732 /*
733 * If the channel switch was not successful, stay
734 * around on the old channel. We currently lack
735 * good handling of this situation, possibly we
736 * should just drop the association.
737 */
738 sdata->local->csa_channel = sdata->local->oper_channel;
739 }
740
741 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
742}
743EXPORT_SYMBOL(ieee80211_chswitch_done);
744
cc32abd4
JB		 745static void ieee80211_chswitch_timer(unsigned long data)
746{
747 struct ieee80211_sub_if_data *sdata =
748 (struct ieee80211_sub_if_data *) data;
749 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
750
5bb644a0
JB		 751 if (sdata->local->quiescing) {
752 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
753 return;
754 }
755
42935eca 756 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 757}
758
759void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
760 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 761 struct ieee80211_bss *bss,
762 u64 timestamp)
cc32abd4 763{
0c1ad2ca
JB		 764 struct cfg80211_bss *cbss =
765 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 766 struct ieee80211_channel *new_ch;
767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 768 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
769 cbss->channel->band);
cc32abd4 770
77fdaa12
JB		 771 ASSERT_MGD_MTX(ifmgd);
772
773 if (!ifmgd->associated)
cc32abd4
JB		 774 return;
775
fbe9c429 776 if (sdata->local->scanning)
cc32abd4
JB		 777 return;
778
779 /* Disregard subsequent beacons if we are already running a timer
780 processing a CSA */
781
782 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
783 return;
784
785 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
786 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
787 return;
788
789 sdata->local->csa_channel = new_ch;
790
5ce6e438
JB		 791 if (sdata->local->ops->channel_switch) {
792 /* use driver's channel switch callback */
793 struct ieee80211_channel_switch ch_switch;
794 memset(&ch_switch, 0, sizeof(ch_switch));
795 ch_switch.timestamp = timestamp;
796 if (sw_elem->mode) {
797 ch_switch.block_tx = true;
798 ieee80211_stop_queues_by_reason(&sdata->local->hw,
799 IEEE80211_QUEUE_STOP_REASON_CSA);
800 }
801 ch_switch.channel = new_ch;
802 ch_switch.count = sw_elem->count;
803 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
804 drv_channel_switch(sdata->local, &ch_switch);
805 return;
806 }
807
808 /* channel switch handled in software */
cc32abd4 809 if (sw_elem->count <= 1) {
42935eca 810 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 811 } else {
9feaddc7
WYG		 812 if (sw_elem->mode)
813 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 814 IEEE80211_QUEUE_STOP_REASON_CSA);
815 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
816 mod_timer(&ifmgd->chswitch_timer,
817 jiffies +
818 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 819 cbss->beacon_interval));
cc32abd4
JB		 820 }
821}
822
823static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
824 u16 capab_info, u8 *pwr_constr_elem,
825 u8 pwr_constr_elem_len)
826{
827 struct ieee80211_conf *conf = &sdata->local->hw.conf;
828
829 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
830 return;
831
832 /* Power constraint IE length should be 1 octet */
833 if (pwr_constr_elem_len != 1)
834 return;
835
a48b13ac 836 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 837 (*pwr_constr_elem != sdata->local->power_constr_level)) {
838 sdata->local->power_constr_level = *pwr_constr_elem;
839 ieee80211_hw_config(sdata->local, 0);
840 }
841}
842
f90754c1
JO		 843void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
844{
845 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
846 struct ieee80211_local *local = sdata->local;
847 struct ieee80211_conf *conf = &local->hw.conf;
848
849 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
850 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
851 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
852
853 local->disable_dynamic_ps = false;
854 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
855}
856EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
857
858void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
859{
860 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
861 struct ieee80211_local *local = sdata->local;
862 struct ieee80211_conf *conf = &local->hw.conf;
863
864 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
865 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
866 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
867
868 local->disable_dynamic_ps = true;
869 conf->dynamic_ps_timeout = 0;
870 del_timer_sync(&local->dynamic_ps_timer);
871 ieee80211_queue_work(&local->hw,
872 &local->dynamic_ps_enable_work);
873}
874EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
875
965bedad
JB		 876/* powersave */
877static void ieee80211_enable_ps(struct ieee80211_local *local,
878 struct ieee80211_sub_if_data *sdata)
879{
880 struct ieee80211_conf *conf = &local->hw.conf;
881
d5edaedc
JB		 882 /*
883 * If we are scanning right now then the parameters will
884 * take effect when scan finishes.
885 */
fbe9c429 886 if (local->scanning)
d5edaedc
JB		 887 return;
888
965bedad
JB		 889 if (conf->dynamic_ps_timeout > 0 &&
890 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
891 mod_timer(&local->dynamic_ps_timer, jiffies +
892 msecs_to_jiffies(conf->dynamic_ps_timeout));
893 } else {
894 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
895 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 896
2a13052f
JO		 897 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
898 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
899 return;
900
901 conf->flags |= IEEE80211_CONF_PS;
902 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 903 }
904}
905
906static void ieee80211_change_ps(struct ieee80211_local *local)
907{
908 struct ieee80211_conf *conf = &local->hw.conf;
909
910 if (local->ps_sdata) {
965bedad
JB		 911 ieee80211_enable_ps(local, local->ps_sdata);
912 } else if (conf->flags & IEEE80211_CONF_PS) {
913 conf->flags &= ~IEEE80211_CONF_PS;
914 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
915 del_timer_sync(&local->dynamic_ps_timer);
916 cancel_work_sync(&local->dynamic_ps_enable_work);
917 }
918}
919
808118cb
JY		 920static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
921{
922 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
923 struct sta_info *sta = NULL;
c2c98fde 924 bool authorized = false;
808118cb
JY		 925
926 if (!mgd->powersave)
927 return false;
928
05cb9108
JB		 929 if (mgd->broken_ap)
930 return false;
931
808118cb
JY		 932 if (!mgd->associated)
933 return false;
934
808118cb
JY		 935 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
936 IEEE80211_STA_CONNECTION_POLL))
937 return false;
938
939 rcu_read_lock();
940 sta = sta_info_get(sdata, mgd->bssid);
941 if (sta)
c2c98fde 942 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 943 rcu_read_unlock();
944
c2c98fde 945 return authorized;
808118cb
JY		 946}
947
965bedad 948/* need to hold RTNL or interface lock */
10f644a4 949void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 950{
951 struct ieee80211_sub_if_data *sdata, *found = NULL;
952 int count = 0;
195e294d 953 int timeout;
965bedad
JB		 954
955 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
956 local->ps_sdata = NULL;
957 return;
958 }
959
960 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 961 if (!ieee80211_sdata_running(sdata))
965bedad 962 continue;
8c7914de
RM		 963 if (sdata->vif.type == NL80211_IFTYPE_AP) {
964 /* If an AP vif is found, then disable PS
965 * by setting the count to zero thereby setting
966 * ps_sdata to NULL.
967 */
968 count = 0;
969 break;
970 }
965bedad
JB		 971 if (sdata->vif.type != NL80211_IFTYPE_STATION)
972 continue;
973 found = sdata;
974 count++;
975 }
976
808118cb 977 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 978 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 979 s32 beaconint_us;
980
981 if (latency < 0)
ed77134b 982 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 983
984 beaconint_us = ieee80211_tu_to_usec(
985 found->vif.bss_conf.beacon_int);
986
ff616381 987 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 988 if (timeout < 0) {
989 /*
ff616381
JO		 990 * Go to full PSM if the user configures a very low
991 * latency requirement.
0ab82b04
EP		 992 * The 2000 second value is there for compatibility
993 * until the PM_QOS_NETWORK_LATENCY is configured
994 * with real values.
195e294d 995 */
0ab82b04
EP		 996 if (latency > (1900 * USEC_PER_MSEC) &&
997 latency != (2000 * USEC_PER_SEC))
195e294d 998 timeout = 0;
ff616381
JO		 999 else
1000 timeout = 100;
195e294d 1001 }
f90754c1
JO		 1002 local->dynamic_ps_user_timeout = timeout;
1003 if (!local->disable_dynamic_ps)
1004 conf->dynamic_ps_timeout =
1005 local->dynamic_ps_user_timeout;
195e294d 1006
04fe2037 1007 if (beaconint_us > latency) {
10f644a4 1008 local->ps_sdata = NULL;
04fe2037 1009 } else {
56007a02 1010 struct ieee80211_bss *bss;
04fe2037 1011 int maxslp = 1;
56007a02 1012 u8 dtimper;
04fe2037 1013
56007a02
JB		 1014 bss = (void *)found->u.mgd.associated->priv;
1015 dtimper = bss->dtim_period;
1016
1017 /* If the TIM IE is invalid, pretend the value is 1 */
1018 if (!dtimper)
1019 dtimper = 1;
1020 else if (dtimper > 1)
04fe2037
JB		 1021 maxslp = min_t(int, dtimper,
1022 latency / beaconint_us);
1023
9ccebe61 1024 local->hw.conf.max_sleep_period = maxslp;
56007a02 1025 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1026 local->ps_sdata = found;
04fe2037 1027 }
10f644a4 1028 } else {
965bedad 1029 local->ps_sdata = NULL;
10f644a4 1030 }
965bedad
JB		 1031
1032 ieee80211_change_ps(local);
1033}
1034
ab095877
EP		 1035void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1036{
1037 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1038
1039 if (sdata->vif.bss_conf.ps != ps_allowed) {
1040 sdata->vif.bss_conf.ps = ps_allowed;
1041 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1042 }
1043}
1044
965bedad
JB		 1045void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1046{
1047 struct ieee80211_local *local =
1048 container_of(work, struct ieee80211_local,
1049 dynamic_ps_disable_work);
1050
1051 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1052 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1053 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1054 }
1055
1056 ieee80211_wake_queues_by_reason(&local->hw,
1057 IEEE80211_QUEUE_STOP_REASON_PS);
1058}
1059
1060void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1061{
1062 struct ieee80211_local *local =
1063 container_of(work, struct ieee80211_local,
1064 dynamic_ps_enable_work);
1065 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1066 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1067 unsigned long flags;
1068 int q;
965bedad
JB		 1069
1070 /* can only happen when PS was just disabled anyway */
1071 if (!sdata)
1072 return;
1073
5e34069c
CL		 1074 ifmgd = &sdata->u.mgd;
1075
965bedad
JB		 1076 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1077 return;
1078
77b7023a
AN		 1079 if (!local->disable_dynamic_ps &&
1080 local->hw.conf.dynamic_ps_timeout > 0) {
1081 /* don't enter PS if TX frames are pending */
1082 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1083 mod_timer(&local->dynamic_ps_timer, jiffies +
1084 msecs_to_jiffies(
1085 local->hw.conf.dynamic_ps_timeout));
1086 return;
1087 }
77b7023a
AN		 1088
1089 /*
1090 * transmission can be stopped by others which leads to
1091 * dynamic_ps_timer expiry. Postpone the ps timer if it
1092 * is not the actual idle state.
1093 */
1094 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1095 for (q = 0; q < local->hw.queues; q++) {
1096 if (local->queue_stop_reasons[q]) {
1097 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1098 flags);
1099 mod_timer(&local->dynamic_ps_timer, jiffies +
1100 msecs_to_jiffies(
1101 local->hw.conf.dynamic_ps_timeout));
1102 return;
1103 }
1104 }
1105 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1106 }
1ddc2867 1107
375177bf 1108 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1109 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1110 netif_tx_stop_all_queues(sdata->dev);
965bedad 1111
e8306f98
VN		 1112 if (drv_tx_frames_pending(local))
1113 mod_timer(&local->dynamic_ps_timer, jiffies +
1114 msecs_to_jiffies(
1115 local->hw.conf.dynamic_ps_timeout));
1116 else {
1117 ieee80211_send_nullfunc(local, sdata, 1);
1118 /* Flush to get the tx status of nullfunc frame */
1119 drv_flush(local, false);
1120 }
f3e85b9e
VN		 1121 }
1122
2a13052f
JO		 1123 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1124 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1125 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1126 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1127 local->hw.conf.flags |= IEEE80211_CONF_PS;
1128 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1129 }
f3e85b9e 1130
77b7023a
AN		 1131 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1132 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1133}
1134
1135void ieee80211_dynamic_ps_timer(unsigned long data)
1136{
1137 struct ieee80211_local *local = (void *) data;
1138
78f1a8b7 1139 if (local->quiescing || local->suspended)
5bb644a0
JB		 1140 return;
1141
42935eca 1142 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1143}
1144
60f8b39c 1145/* MLME */
7d25745d 1146static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1147 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1148 u8 *wmm_param, size_t wmm_param_len)
1149{
f0706e82 1150 struct ieee80211_tx_queue_params params;
4ced3f74 1151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1152 size_t left;
1153 int count;
ab13315a 1154 u8 *pos, uapsd_queues = 0;
f0706e82 1155
e1b3ec1a 1156 if (!local->ops->conf_tx)
7d25745d 1157 return false;
e1b3ec1a 1158
32c5057b 1159 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1160 return false;
3434fbd3
JB		 1161
1162 if (!wmm_param)
7d25745d 1163 return false;
3434fbd3 1164
f0706e82 1165 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1166 return false;
ab13315a
KV		 1167
1168 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1169 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1170
f0706e82 1171 count = wmm_param[6] & 0x0f;
46900298 1172 if (count == ifmgd->wmm_last_param_set)
7d25745d 1173 return false;
46900298 1174 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1175
1176 pos = wmm_param + 8;
1177 left = wmm_param_len - 8;
1178
1179 memset(&params, 0, sizeof(params));
1180
00e96dec 1181 sdata->wmm_acm = 0;
f0706e82
JB		 1182 for (; left >= 4; left -= 4, pos += 4) {
1183 int aci = (pos[0] >> 5) & 0x03;
1184 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1185 bool uapsd = false;
f0706e82
JB		 1186 int queue;
1187
1188 switch (aci) {
0eeb59fe 1189 case 1: /* AC_BK */
e100bb64 1190 queue = 3;
988c0f72 1191 if (acm)
00e96dec 1192 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1193 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1194 uapsd = true;
f0706e82 1195 break;
0eeb59fe 1196 case 2: /* AC_VI */
e100bb64 1197 queue = 1;
988c0f72 1198 if (acm)
00e96dec 1199 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1200 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1201 uapsd = true;
f0706e82 1202 break;
0eeb59fe 1203 case 3: /* AC_VO */
e100bb64 1204 queue = 0;
988c0f72 1205 if (acm)
00e96dec 1206 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1207 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1208 uapsd = true;
f0706e82 1209 break;
0eeb59fe 1210 case 0: /* AC_BE */
f0706e82 1211 default:
e100bb64 1212 queue = 2;
988c0f72 1213 if (acm)
00e96dec 1214 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1215 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1216 uapsd = true;
f0706e82
JB		 1217 break;
1218 }
1219
1220 params.aifs = pos[0] & 0x0f;
1221 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1222 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1223 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1224 params.uapsd = uapsd;
1225
bdcbd8e0
JB		 1226 mlme_dbg(sdata,
1227 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1228 queue, aci, acm,
1229 params.aifs, params.cw_min, params.cw_max,
1230 params.txop, params.uapsd);
f6f3def3
EP		 1231 sdata->tx_conf[queue] = params;
1232 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1233 sdata_err(sdata,
1234 "failed to set TX queue parameters for queue %d\n",
1235 queue);
f0706e82 1236 }
e1b3ec1a
SG		 1237
1238 /* enable WMM or activate new settings */
4ced3f74 1239 sdata->vif.bss_conf.qos = true;
7d25745d 1240 return true;
f0706e82
JB		 1241}
1242
925e64c3
SG		 1243static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1244{
1245 lockdep_assert_held(&sdata->local->mtx);
1246
1247 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1248 IEEE80211_STA_BEACON_POLL);
1249 ieee80211_run_deferred_scan(sdata->local);
1250}
1251
1252static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1253{
1254 mutex_lock(&sdata->local->mtx);
1255 __ieee80211_stop_poll(sdata);
1256 mutex_unlock(&sdata->local->mtx);
1257}
1258
7a5158ef
JB		 1259static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1260 u16 capab, bool erp_valid, u8 erp)
5628221c 1261{
bda3933a 1262 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1263 u32 changed = 0;
7a5158ef
JB		 1264 bool use_protection;
1265 bool use_short_preamble;
1266 bool use_short_slot;
1267
1268 if (erp_valid) {
1269 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1270 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1271 } else {
1272 use_protection = false;
1273 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1274 }
1275
1276 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1277 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1278 use_short_slot = true;
5628221c 1279
471b3efd 1280 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1281 bss_conf->use_cts_prot = use_protection;
1282 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1283 }
7e9ed188 1284
d43c7b37 1285 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1286 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1287 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1288 }
d9430a32 1289
7a5158ef 1290 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1291 bss_conf->use_short_slot = use_short_slot;
1292 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1293 }
1294
1295 return changed;
1296}
1297
f698d856 1298static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1299 struct cfg80211_bss *cbss,
ae5eb026 1300 u32 bss_info_changed)
f0706e82 1301{
0c1ad2ca 1302 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1303 struct ieee80211_local *local = sdata->local;
68542962 1304 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1305
ae5eb026 1306 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1307 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1308 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1309
7ccc8bd7
FF		 1310 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1311 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1312
0c1ad2ca
JB		 1313 sdata->u.mgd.associated = cbss;
1314 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1315
17e4ec14
JM		 1316 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1317
b291ba11 1318 /* just to be sure */
925e64c3 1319 ieee80211_stop_poll(sdata);
b291ba11 1320
9ac19a90 1321 ieee80211_led_assoc(local, 1);
9306102e 1322
e5b900d2
JB		 1323 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1324 bss_conf->dtim_period = bss->dtim_period;
1325 else
1326 bss_conf->dtim_period = 0;
1327
68542962 1328 bss_conf->assoc = 1;
9cef8737 1329
a97c13c3 1330 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1331 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1332 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1333 bss_info_changed |= BSS_CHANGED_CQM;
1334
68542962
JO		 1335 /* Enable ARP filtering */
1336 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1337 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1338 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1339 }
1340
ae5eb026 1341 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1342
056508dc
JB		 1343 mutex_lock(&local->iflist_mtx);
1344 ieee80211_recalc_ps(local, -1);
025e6be2 1345 ieee80211_recalc_smps(local);
056508dc 1346 mutex_unlock(&local->iflist_mtx);
e0cb686f 1347
ab095877
EP		 1348 ieee80211_recalc_ps_vif(sdata);
1349
8a5b33f5 1350 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1351 netif_carrier_on(sdata->dev);
f0706e82
JB		 1352}
1353
e69e95db 1354static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1355 u16 stype, u16 reason, bool tx,
1356 u8 *frame_buf)
aa458d17 1357{
46900298 1358 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1359 struct ieee80211_local *local = sdata->local;
1360 struct sta_info *sta;
3cc5240b 1361 u32 changed = 0;
aa458d17 1362
77fdaa12
JB		 1363 ASSERT_MGD_MTX(ifmgd);
1364
37ad3888
JB		 1365 if (WARN_ON_ONCE(tx && !frame_buf))
1366 return;
1367
b291ba11
JB		 1368 if (WARN_ON(!ifmgd->associated))
1369 return;
1370
79543d8e
DS		 1371 ieee80211_stop_poll(sdata);
1372
77fdaa12 1373 ifmgd->associated = NULL;
77fdaa12
JB		 1374
1375 /*
1376 * we need to commit the associated = NULL change because the
1377 * scan code uses that to determine whether this iface should
1378 * go to/wake up from powersave or not -- and could otherwise
1379 * wake the queues erroneously.
1380 */
1381 smp_mb();
1382
1383 /*
1384 * Thus, we can only afterwards stop the queues -- to account
1385 * for the case where another CPU is finishing a scan at this
1386 * time -- we don't want the scan code to enable queues.
1387 */
aa458d17 1388
8a5b33f5 1389 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1390 netif_carrier_off(sdata->dev);
1391
2a419056 1392 mutex_lock(&local->sta_mtx);
88a9e31c 1393 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1394 if (sta) {
c2c98fde 1395 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1396 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1397 }
2a419056 1398 mutex_unlock(&local->sta_mtx);
aa458d17 1399
88bc40e8
EP		 1400 /*
1401 * if we want to get out of ps before disassoc (why?) we have
1402 * to do it before sending disassoc, as otherwise the null-packet
1403 * won't be valid.
1404 */
1405 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1406 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1407 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1408 }
1409 local->ps_sdata = NULL;
1410
ab095877
EP		 1411 /* disable per-vif ps */
1412 ieee80211_recalc_ps_vif(sdata);
1413
f823981e
EP		 1414 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1415 if (tx)
1416 drv_flush(local, false);
1417
37ad3888
JB		 1418 /* deauthenticate/disassociate now */
1419 if (tx || frame_buf)
88a9e31c
EP		 1420 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1421 reason, tx, frame_buf);
37ad3888
JB		 1422
1423 /* flush out frame */
1424 if (tx)
1425 drv_flush(local, false);
1426
88a9e31c
EP		 1427 /* clear bssid only after building the needed mgmt frames */
1428 memset(ifmgd->bssid, 0, ETH_ALEN);
1429
37ad3888
JB		 1430 /* remove AP and TDLS peers */
1431 sta_info_flush(local, sdata);
1432
1433 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1434 changed |= ieee80211_reset_erp_info(sdata);
1435
f5e5bf25 1436 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1437 changed |= BSS_CHANGED_ASSOC;
1438 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1439
413ad50a 1440 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1441 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1442 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1443
a8302de9
VT		 1444 local->power_constr_level = 0;
1445
520eb820
KV		 1446 del_timer_sync(&local->dynamic_ps_timer);
1447 cancel_work_sync(&local->dynamic_ps_enable_work);
1448
68542962
JO		 1449 /* Disable ARP filtering */
1450 if (sdata->vif.bss_conf.arp_filter_enabled) {
1451 sdata->vif.bss_conf.arp_filter_enabled = false;
1452 changed |= BSS_CHANGED_ARP_FILTER;
1453 }
1454
3abead59
JB		 1455 sdata->vif.bss_conf.qos = false;
1456 changed |= BSS_CHANGED_QOS;
1457
0aaffa9b
JB		 1458 /* The BSSID (not really interesting) and HT changed */
1459 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1460 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1461
3cc5240b
JB		 1462 /* channel(_type) changes are handled by ieee80211_hw_config */
1463 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1464 ieee80211_hw_config(local, 0);
1465
3abead59
JB		 1466 /* disassociated - set to defaults now */
1467 ieee80211_set_wmm_default(sdata, false);
1468
b9dcf712
JB		 1469 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1470 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1471 del_timer_sync(&sdata->u.mgd.timer);
1472 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1473}
f0706e82 1474
3cf335d5
KV		 1475void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1476 struct ieee80211_hdr *hdr)
1477{
1478 /*
1479 * We can postpone the mgd.timer whenever receiving unicast frames
1480 * from AP because we know that the connection is working both ways
1481 * at that time. But multicast frames (and hence also beacons) must
1482 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1483 * data idle periods for sending the periodic probe request to the
1484 * AP we're connected to.
3cf335d5 1485 */
b291ba11
JB		 1486 if (is_multicast_ether_addr(hdr->addr1))
1487 return;
1488
be099e82 1489 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1490}
f0706e82 1491
4e5ff376
FF		 1492static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1493{
1494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1495 struct ieee80211_local *local = sdata->local;
4e5ff376 1496
133d40f9 1497 mutex_lock(&local->mtx);
4e5ff376 1498 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1499 IEEE80211_STA_CONNECTION_POLL))) {
1500 mutex_unlock(&local->mtx);
1501 return;
1502 }
4e5ff376 1503
925e64c3 1504 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1505
1506 mutex_lock(&local->iflist_mtx);
1507 ieee80211_recalc_ps(local, -1);
1508 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1509
1510 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1511 goto out;
4e5ff376
FF		 1512
1513 /*
1514 * We've received a probe response, but are not sure whether
1515 * we have or will be receiving any beacons or data, so let's
1516 * schedule the timers again, just in case.
1517 */
1518 ieee80211_sta_reset_beacon_monitor(sdata);
1519
1520 mod_timer(&ifmgd->conn_mon_timer,
1521 round_jiffies_up(jiffies +
1522 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1523out:
133d40f9 1524 mutex_unlock(&local->mtx);
4e5ff376
FF		 1525}
1526
1527void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1528 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1529{
75706d0e 1530 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1531 return;
1532
04ac3c0e
FF		 1533 if (ack)
1534 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1535
1536 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1537 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1538 if (ack)
1539 sdata->u.mgd.probe_send_count = 0;
1540 else
1541 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1542 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1543 }
1544}
1545
a43abf29
ML		 1546static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1547{
1548 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1549 const u8 *ssid;
f01a067d 1550 u8 *dst = ifmgd->associated->bssid;
180205bd 1551 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1552
1553 /*
1554 * Try sending broadcast probe requests for the last three
1555 * probe requests after the first ones failed since some
1556 * buggy APs only support broadcast probe requests.
1557 */
1558 if (ifmgd->probe_send_count >= unicast_limit)
1559 dst = NULL;
a43abf29 1560
4e5ff376
FF		 1561 /*
1562 * When the hardware reports an accurate Tx ACK status, it's
1563 * better to send a nullfunc frame instead of a probe request,
1564 * as it will kick us off the AP quickly if we aren't associated
1565 * anymore. The timeout will be reset if the frame is ACKed by
1566 * the AP.
1567 */
992e68bf
SD		 1568 ifmgd->probe_send_count++;
1569
04ac3c0e
FF		 1570 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1571 ifmgd->nullfunc_failed = false;
4e5ff376 1572 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1573 } else {
88c868c4
SG		 1574 int ssid_len;
1575
4e5ff376 1576 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1577 if (WARN_ON_ONCE(ssid == NULL))
1578 ssid_len = 0;
1579 else
1580 ssid_len = ssid[1];
1581
1582 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1583 0, (u32) -1, true, false);
4e5ff376 1584 }
a43abf29 1585
180205bd 1586 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1587 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1588 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1589 drv_flush(sdata->local, false);
a43abf29
ML		 1590}
1591
b291ba11
JB		 1592static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1593 bool beacon)
04de8381 1594{
04de8381 1595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1596 bool already = false;
34bfc411 1597
9607e6b6 1598 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1599 return;
1600
77fdaa12
JB		 1601 mutex_lock(&ifmgd->mtx);
1602
1603 if (!ifmgd->associated)
1604 goto out;
1605
133d40f9
SG		 1606 mutex_lock(&sdata->local->mtx);
1607
1608 if (sdata->local->tmp_channel || sdata->local->scanning) {
1609 mutex_unlock(&sdata->local->mtx);
1610 goto out;
1611 }
1612
e87cc472 1613 if (beacon)
bdcbd8e0
JB		 1614 mlme_dbg_ratelimited(sdata,
1615 "detected beacon loss from AP - sending probe request\n");
1616
6efb71b0
HS		 1617 ieee80211_cqm_rssi_notify(&sdata->vif,
1618 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1619
b291ba11
JB		 1620 /*
1621 * The driver/our work has already reported this event or the
1622 * connection monitoring has kicked in and we have already sent
1623 * a probe request. Or maybe the AP died and the driver keeps
1624 * reporting until we disassociate...
1625 *
1626 * In either case we have to ignore the current call to this
1627 * function (except for setting the correct probe reason bit)
1628 * because otherwise we would reset the timer every time and
1629 * never check whether we received a probe response!
1630 */
1631 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1632 IEEE80211_STA_CONNECTION_POLL))
1633 already = true;
1634
1635 if (beacon)
1636 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1637 else
1638 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1639
133d40f9
SG		 1640 mutex_unlock(&sdata->local->mtx);
1641
b291ba11
JB		 1642 if (already)
1643 goto out;
1644
4e751843
JB		 1645 mutex_lock(&sdata->local->iflist_mtx);
1646 ieee80211_recalc_ps(sdata->local, -1);
1647 mutex_unlock(&sdata->local->iflist_mtx);
1648
a43abf29
ML		 1649 ifmgd->probe_send_count = 0;
1650 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1651 out:
1652 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1653}
1654
a619a4c0
JO		 1655struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1656 struct ieee80211_vif *vif)
1657{
1658 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1659 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1660 struct cfg80211_bss *cbss;
a619a4c0
JO		 1661 struct sk_buff *skb;
1662 const u8 *ssid;
88c868c4 1663 int ssid_len;
a619a4c0
JO		 1664
1665 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1666 return NULL;
1667
1668 ASSERT_MGD_MTX(ifmgd);
1669
d9b3b28b
EP		 1670 if (ifmgd->associated)
1671 cbss = ifmgd->associated;
1672 else if (ifmgd->auth_data)
1673 cbss = ifmgd->auth_data->bss;
1674 else if (ifmgd->assoc_data)
1675 cbss = ifmgd->assoc_data->bss;
1676 else
a619a4c0
JO		 1677 return NULL;
1678
d9b3b28b 1679 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1680 if (WARN_ON_ONCE(ssid == NULL))
1681 ssid_len = 0;
1682 else
1683 ssid_len = ssid[1];
1684
d9b3b28b 1685 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
88c868c4 1686 (u32) -1, ssid + 2, ssid_len,
85a237fe 1687 NULL, 0, true);
a619a4c0
JO		 1688
1689 return skb;
1690}
1691EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1692
1e4dcd01
JO		 1693static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1694{
1695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1696 struct ieee80211_local *local = sdata->local;
1697 u8 bssid[ETH_ALEN];
5fef7dbc 1698 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1699
1700 mutex_lock(&ifmgd->mtx);
1701 if (!ifmgd->associated) {
1702 mutex_unlock(&ifmgd->mtx);
1703 return;
1704 }
1705
1706 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1707
bdcbd8e0 1708 sdata_info(sdata, "Connection to AP %pM lost\n", bssid);
1e4dcd01 1709
37ad3888
JB		 1710 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1711 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1712 false, frame_buf);
1e4dcd01 1713 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1714
1e4dcd01
JO		 1715 /*
1716 * must be outside lock due to cfg80211,
1717 * but that's not a problem.
1718 */
5fef7dbc 1719 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1720
1721 mutex_lock(&local->mtx);
1722 ieee80211_recalc_idle(local);
1723 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1724}
1725
1726void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1727{
1728 struct ieee80211_sub_if_data *sdata =
1729 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1730 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1732 struct sta_info *sta;
1733
1734 if (ifmgd->associated) {
30fa9047 1735 rcu_read_lock();
a85e1d55
PS		 1736 sta = sta_info_get(sdata, ifmgd->bssid);
1737 if (sta)
1738 sta->beacon_loss_count++;
30fa9047 1739 rcu_read_unlock();
a85e1d55 1740 }
b291ba11 1741
1e4dcd01
JO		 1742 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1743 __ieee80211_connection_loss(sdata);
1744 else
1745 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1746}
1747
04de8381
KV		 1748void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1749{
1750 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1751 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1752
b5878a2d
JB		 1753 trace_api_beacon_loss(sdata);
1754
1e4dcd01
JO		 1755 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1756 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1757}
1758EXPORT_SYMBOL(ieee80211_beacon_loss);
1759
1e4dcd01
JO		 1760void ieee80211_connection_loss(struct ieee80211_vif *vif)
1761{
1762 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1763 struct ieee80211_hw *hw = &sdata->local->hw;
1764
b5878a2d
JB		 1765 trace_api_connection_loss(sdata);
1766
1e4dcd01
JO		 1767 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1768 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1769}
1770EXPORT_SYMBOL(ieee80211_connection_loss);
1771
1772
66e67e41
JB		 1773static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1774 bool assoc)
1775{
1776 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1777
1778 lockdep_assert_held(&sdata->u.mgd.mtx);
1779
66e67e41
JB		 1780 if (!assoc) {
1781 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1782
1783 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1784 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1785 }
1786
1787 cfg80211_put_bss(auth_data->bss);
1788 kfree(auth_data);
1789 sdata->u.mgd.auth_data = NULL;
1790}
1791
1792static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1793 struct ieee80211_mgmt *mgmt, size_t len)
1794{
1795 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1796 u8 *pos;
1797 struct ieee802_11_elems elems;
1798
1799 pos = mgmt->u.auth.variable;
1800 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1801 if (!elems.challenge)
1802 return;
1803 auth_data->expected_transaction = 4;
a1845fc7 1804 drv_mgd_prepare_tx(sdata->local, sdata);
66e67e41
JB		 1805 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1806 elems.challenge - 2, elems.challenge_len + 2,
1807 auth_data->bss->bssid, auth_data->bss->bssid,
1808 auth_data->key, auth_data->key_len,
1809 auth_data->key_idx);
1810}
1811
1812static enum rx_mgmt_action __must_check
1813ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1814 struct ieee80211_mgmt *mgmt, size_t len)
1815{
1816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1817 u8 bssid[ETH_ALEN];
1818 u16 auth_alg, auth_transaction, status_code;
1819 struct sta_info *sta;
1820
1821 lockdep_assert_held(&ifmgd->mtx);
1822
1823 if (len < 24 + 6)
1824 return RX_MGMT_NONE;
1825
1826 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1827 return RX_MGMT_NONE;
1828
1829 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1830
b203ca39 1831 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1832 return RX_MGMT_NONE;
1833
1834 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1835 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1836 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1837
1838 if (auth_alg != ifmgd->auth_data->algorithm ||
1839 auth_transaction != ifmgd->auth_data->expected_transaction)
1840 return RX_MGMT_NONE;
1841
1842 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1843 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1844 mgmt->sa, status_code);
dac211ec
EP		 1845 ieee80211_destroy_auth_data(sdata, false);
1846 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1847 }
1848
1849 switch (ifmgd->auth_data->algorithm) {
1850 case WLAN_AUTH_OPEN:
1851 case WLAN_AUTH_LEAP:
1852 case WLAN_AUTH_FT:
1853 break;
1854 case WLAN_AUTH_SHARED_KEY:
1855 if (ifmgd->auth_data->expected_transaction != 4) {
1856 ieee80211_auth_challenge(sdata, mgmt, len);
1857 /* need another frame */
1858 return RX_MGMT_NONE;
1859 }
1860 break;
1861 default:
1862 WARN_ONCE(1, "invalid auth alg %d",
1863 ifmgd->auth_data->algorithm);
1864 return RX_MGMT_NONE;
1865 }
1866
bdcbd8e0 1867 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1868 ifmgd->auth_data->done = true;
1869 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1870 run_again(ifmgd, ifmgd->auth_data->timeout);
1871
1872 /* move station state to auth */
1873 mutex_lock(&sdata->local->sta_mtx);
1874 sta = sta_info_get(sdata, bssid);
1875 if (!sta) {
1876 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1877 goto out_err;
1878 }
1879 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1880 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1881 goto out_err;
1882 }
1883 mutex_unlock(&sdata->local->sta_mtx);
1884
1885 return RX_MGMT_CFG80211_RX_AUTH;
1886 out_err:
1887 mutex_unlock(&sdata->local->sta_mtx);
1888 /* ignore frame -- wait for timeout */
1889 return RX_MGMT_NONE;
1890}
1891
1892
77fdaa12
JB		 1893static enum rx_mgmt_action __must_check
1894ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1895 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1896{
46900298 1897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1898 const u8 *bssid = NULL;
f0706e82
JB		 1899 u16 reason_code;
1900
66e67e41
JB		 1901 lockdep_assert_held(&ifmgd->mtx);
1902
f4ea83dd 1903 if (len < 24 + 2)
77fdaa12 1904 return RX_MGMT_NONE;
f0706e82 1905
66e67e41 1906 if (!ifmgd->associated ||
b203ca39 1907 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1908 return RX_MGMT_NONE;
77fdaa12 1909
0c1ad2ca 1910 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1911
1912 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1913
bdcbd8e0
JB		 1914 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1915 bssid, reason_code);
77fdaa12 1916
37ad3888
JB		 1917 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1918
7da7cc1d 1919 mutex_lock(&sdata->local->mtx);
63f170e0 1920 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1921 mutex_unlock(&sdata->local->mtx);
f0706e82 1922
77fdaa12 1923 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1924}
1925
1926
77fdaa12
JB		 1927static enum rx_mgmt_action __must_check
1928ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1929 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1930{
46900298 1931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1932 u16 reason_code;
1933
66e67e41 1934 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1935
66e67e41 1936 if (len < 24 + 2)
77fdaa12
JB		 1937 return RX_MGMT_NONE;
1938
66e67e41 1939 if (!ifmgd->associated ||
b203ca39 1940 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1941 return RX_MGMT_NONE;
f0706e82
JB		 1942
1943 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1944
bdcbd8e0
JB		 1945 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1946 mgmt->sa, reason_code);
f0706e82 1947
37ad3888
JB		 1948 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1949
7da7cc1d 1950 mutex_lock(&sdata->local->mtx);
bc83b681 1951 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1952 mutex_unlock(&sdata->local->mtx);
37ad3888 1953
77fdaa12 1954 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1955}
1956
c74d084f
CL		 1957static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1958 u8 *supp_rates, unsigned int supp_rates_len,
1959 u32 *rates, u32 *basic_rates,
1960 bool *have_higher_than_11mbit,
1961 int *min_rate, int *min_rate_index)
1962{
1963 int i, j;
1964
1965 for (i = 0; i < supp_rates_len; i++) {
1966 int rate = (supp_rates[i] & 0x7f) * 5;
1967 bool is_basic = !!(supp_rates[i] & 0x80);
1968
1969 if (rate > 110)
1970 *have_higher_than_11mbit = true;
1971
1972 /*
1973 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1974 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1975 *
1976 * Note: Even through the membership selector and the basic
1977 * rate flag share the same bit, they are not exactly
1978 * the same.
1979 */
1980 if (!!(supp_rates[i] & 0x80) &&
1981 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1982 continue;
1983
1984 for (j = 0; j < sband->n_bitrates; j++) {
1985 if (sband->bitrates[j].bitrate == rate) {
1986 *rates |= BIT(j);
1987 if (is_basic)
1988 *basic_rates |= BIT(j);
1989 if (rate < *min_rate) {
1990 *min_rate = rate;
1991 *min_rate_index = j;
1992 }
1993 break;
1994 }
1995 }
1996 }
1997}
f0706e82 1998
66e67e41
JB		 1999static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2000 bool assoc)
2001{
2002 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2003
2004 lockdep_assert_held(&sdata->u.mgd.mtx);
2005
66e67e41
JB		 2006 if (!assoc) {
2007 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2008
2009 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2010 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2011 }
2012
2013 kfree(assoc_data);
2014 sdata->u.mgd.assoc_data = NULL;
2015}
2016
2017static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2018 struct cfg80211_bss *cbss,
af6b6374 2019 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2020{
46900298 2021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2022 struct ieee80211_local *local = sdata->local;
8318d78a 2023 struct ieee80211_supported_band *sband;
f0706e82 2024 struct sta_info *sta;
af6b6374 2025 u8 *pos;
af6b6374 2026 u16 capab_info, aid;
f0706e82 2027 struct ieee802_11_elems elems;
bda3933a 2028 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2029 u32 changed = 0;
c74d084f 2030 int err;
f0706e82 2031
af6b6374 2032 /* AssocResp and ReassocResp have identical structure */
f0706e82 2033
f0706e82 2034 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2035 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2036
1dd84aa2 2037 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2038 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2039 aid);
1dd84aa2
JB		 2040 aid &= ~(BIT(15) | BIT(14));
2041
05cb9108
JB		 2042 ifmgd->broken_ap = false;
2043
2044 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2045 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2046 aid);
05cb9108
JB		 2047 aid = 0;
2048 ifmgd->broken_ap = true;
2049 }
2050
af6b6374
JB		 2051 pos = mgmt->u.assoc_resp.variable;
2052 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2053
f0706e82 2054 if (!elems.supp_rates) {
bdcbd8e0 2055 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2056 return false;
f0706e82
JB		 2057 }
2058
46900298 2059 ifmgd->aid = aid;
f0706e82 2060
2a33bee2
GE		 2061 mutex_lock(&sdata->local->sta_mtx);
2062 /*
2063 * station info was already allocated and inserted before
2064 * the association and should be available to us
2065 */
7852e361 2066 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2067 if (WARN_ON(!sta)) {
2068 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2069 return false;
77fdaa12 2070 }
05e5e883 2071
66e67e41 2072 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2073
ab1faead 2074 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2075 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2076 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2077
64f68e5d
JB		 2078 sta->supports_40mhz =
2079 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2080
4b7679a5 2081 rate_control_rate_init(sta);
f0706e82 2082
46900298 2083 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2084 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2085
ddf4ac53 2086 if (elems.wmm_param)
c2c98fde 2087 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2088
c8987876
JB		 2089 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2090 if (!err)
2091 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2092 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2093 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2094 if (err) {
bdcbd8e0
JB		 2095 sdata_info(sdata,
2096 "failed to move station %pM to desired state\n",
2097 sta->sta.addr);
c8987876
JB		 2098 WARN_ON(__sta_info_destroy(sta));
2099 mutex_unlock(&sdata->local->sta_mtx);
2100 return false;
2101 }
2102
7852e361 2103 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2104
f2176d72
JO		 2105 /*
2106 * Always handle WMM once after association regardless
2107 * of the first value the AP uses. Setting -1 here has
2108 * that effect because the AP values is an unsigned
2109 * 4-bit value.
2110 */
2111 ifmgd->wmm_last_param_set = -1;
2112
ddf4ac53 2113 if (elems.wmm_param)
4ced3f74 2114 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2115 elems.wmm_param_len);
aa837e1d 2116 else
3abead59
JB		 2117 ieee80211_set_wmm_default(sdata, false);
2118 changed |= BSS_CHANGED_QOS;
f0706e82 2119
074d46d1 2120 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2121 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2122 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2123 cbss->bssid, false);
ae5eb026 2124
60f8b39c
JB		 2125 /* set AID and assoc capability,
2126 * ieee80211_set_associated() will tell the driver */
2127 bss_conf->aid = aid;
2128 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2129 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2130
d524215f
FF		 2131 /*
2132 * If we're using 4-addr mode, let the AP know that we're
2133 * doing so, so that it can create the STA VLAN on its side
2134 */
2135 if (ifmgd->use_4addr)
2136 ieee80211_send_4addr_nullfunc(local, sdata);
2137
15b7b062 2138 /*
b291ba11
JB		 2139 * Start timer to probe the connection to the AP now.
2140 * Also start the timer that will detect beacon loss.
15b7b062 2141 */
b291ba11 2142 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2143 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2144
af6b6374 2145 return true;
f0706e82
JB		 2146}
2147
66e67e41
JB		 2148static enum rx_mgmt_action __must_check
2149ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2150 struct ieee80211_mgmt *mgmt, size_t len,
2151 struct cfg80211_bss **bss)
2152{
2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2154 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2155 u16 capab_info, status_code, aid;
2156 struct ieee802_11_elems elems;
2157 u8 *pos;
2158 bool reassoc;
2159
2160 lockdep_assert_held(&ifmgd->mtx);
2161
2162 if (!assoc_data)
2163 return RX_MGMT_NONE;
b203ca39 2164 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2165 return RX_MGMT_NONE;
2166
2167 /*
2168 * AssocResp and ReassocResp have identical structure, so process both
2169 * of them in this function.
2170 */
2171
2172 if (len < 24 + 6)
2173 return RX_MGMT_NONE;
2174
2175 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2176 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2177 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2178 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2179
bdcbd8e0
JB		 2180 sdata_info(sdata,
2181 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2182 reassoc ? "Rea" : "A", mgmt->sa,
2183 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2184
2185 pos = mgmt->u.assoc_resp.variable;
2186 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2187
2188 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2189 elems.timeout_int && elems.timeout_int_len == 5 &&
2190 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2191 u32 tu, ms;
2192 tu = get_unaligned_le32(elems.timeout_int + 1);
2193 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2194 sdata_info(sdata,
2195 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2196 mgmt->sa, tu, ms);
66e67e41
JB		 2197 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2198 if (ms > IEEE80211_ASSOC_TIMEOUT)
2199 run_again(ifmgd, assoc_data->timeout);
2200 return RX_MGMT_NONE;
2201 }
2202
2203 *bss = assoc_data->bss;
2204
2205 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2206 sdata_info(sdata, "%pM denied association (code=%d)\n",
2207 mgmt->sa, status_code);
66e67e41
JB		 2208 ieee80211_destroy_assoc_data(sdata, false);
2209 } else {
66e67e41
JB		 2210 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2211 /* oops -- internal error -- send timeout for now */
10a9109f 2212 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2213 cfg80211_put_bss(*bss);
2214 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2215 }
635d999f 2216 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2217
2218 /*
2219 * destroy assoc_data afterwards, as otherwise an idle
2220 * recalc after assoc_data is NULL but before associated
2221 * is set can cause the interface to go idle
2222 */
2223 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2224 }
2225
2226 return RX_MGMT_CFG80211_RX_ASSOC;
2227}
98c8fccf
JB		 2228static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2229 struct ieee80211_mgmt *mgmt,
2230 size_t len,
2231 struct ieee80211_rx_status *rx_status,
2232 struct ieee802_11_elems *elems,
2233 bool beacon)
2234{
2235 struct ieee80211_local *local = sdata->local;
2236 int freq;
c2b13452 2237 struct ieee80211_bss *bss;
98c8fccf 2238 struct ieee80211_channel *channel;
56007a02
JB		 2239 bool need_ps = false;
2240
66e67e41 2241 if (sdata->u.mgd.associated &&
b203ca39 2242 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2243 bss = (void *)sdata->u.mgd.associated->priv;
2244 /* not previously set so we may need to recalc */
2245 need_ps = !bss->dtim_period;
2246 }
98c8fccf
JB		 2247
2248 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2249 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2250 rx_status->band);
98c8fccf
JB		 2251 else
2252 freq = rx_status->freq;
2253
2254 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2255
2256 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2257 return;
2258
98c8fccf 2259 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2260 channel, beacon);
77fdaa12
JB		 2261 if (bss)
2262 ieee80211_rx_bss_put(local, bss);
2263
2264 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2265 return;
2266
56007a02
JB		 2267 if (need_ps) {
2268 mutex_lock(&local->iflist_mtx);
2269 ieee80211_recalc_ps(local, -1);
2270 mutex_unlock(&local->iflist_mtx);
2271 }
2272
c481ec97 2273 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2274 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2275 ETH_ALEN) == 0)) {
c481ec97
S		 2276 struct ieee80211_channel_sw_ie *sw_elem =
2277 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2278 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2279 bss, rx_status->mactime);
c481ec97 2280 }
f0706e82
JB		 2281}
2282
2283
f698d856 2284static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2285 struct sk_buff *skb)
f0706e82 2286{
af6b6374 2287 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2288 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2289 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2290 size_t baselen, len = skb->len;
ae6a44e3
EK		 2291 struct ieee802_11_elems elems;
2292
15b7b062
KV		 2293 ifmgd = &sdata->u.mgd;
2294
77fdaa12
JB		 2295 ASSERT_MGD_MTX(ifmgd);
2296
b203ca39 2297 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2298 return; /* ignore ProbeResp to foreign address */
2299
ae6a44e3
EK		 2300 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2301 if (baselen > len)
2302 return;
2303
2304 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2305 &elems);
2306
98c8fccf 2307 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2308
77fdaa12 2309 if (ifmgd->associated &&
b203ca39 2310 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2311 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2312
2313 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2314 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2315 /* got probe response, continue with auth */
bdcbd8e0 2316 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2317 ifmgd->auth_data->tries = 0;
2318 ifmgd->auth_data->timeout = jiffies;
2319 run_again(ifmgd, ifmgd->auth_data->timeout);
2320 }
f0706e82
JB		 2321}
2322
d91f36db
JB		 2323/*
2324 * This is the canonical list of information elements we care about,
2325 * the filter code also gives us all changes to the Microsoft OUI
2326 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2327 *
2328 * We implement beacon filtering in software since that means we can
2329 * avoid processing the frame here and in cfg80211, and userspace
2330 * will not be able to tell whether the hardware supports it or not.
2331 *
2332 * XXX: This list needs to be dynamic -- userspace needs to be able to
2333 * add items it requires. It also needs to be able to tell us to
2334 * look out for other vendor IEs.
2335 */
2336static const u64 care_about_ies =
1d4df3a5
JB		 2337 (1ULL << WLAN_EID_COUNTRY) |
2338 (1ULL << WLAN_EID_ERP_INFO) |
2339 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2340 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2341 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2342 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2343
f698d856 2344static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2345 struct ieee80211_mgmt *mgmt,
2346 size_t len,
2347 struct ieee80211_rx_status *rx_status)
2348{
d91f36db 2349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2350 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2351 size_t baselen;
2352 struct ieee802_11_elems elems;
f698d856 2353 struct ieee80211_local *local = sdata->local;
471b3efd 2354 u32 changed = 0;
d91f36db 2355 bool erp_valid, directed_tim = false;
7a5158ef 2356 u8 erp_value = 0;
d91f36db 2357 u32 ncrc;
77fdaa12
JB		 2358 u8 *bssid;
2359
66e67e41 2360 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2361
ae6a44e3
EK		 2362 /* Process beacon from the current BSS */
2363 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2364 if (baselen > len)
2365 return;
2366
d91f36db 2367 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2368 return;
f0706e82 2369
66e67e41 2370 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2371 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2372 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2373 len - baselen, &elems);
77fdaa12 2374
66e67e41
JB		 2375 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2376 false);
2377 ifmgd->assoc_data->have_beacon = true;
2378 ifmgd->assoc_data->sent_assoc = false;
2379 /* continue assoc process */
2380 ifmgd->assoc_data->timeout = jiffies;
2381 run_again(ifmgd, ifmgd->assoc_data->timeout);
2382 return;
2383 }
77fdaa12 2384
66e67e41 2385 if (!ifmgd->associated ||
b203ca39 2386 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2387 return;
66e67e41 2388 bssid = ifmgd->associated->bssid;
f0706e82 2389
17e4ec14
JM		 2390 /* Track average RSSI from the Beacon frames of the current AP */
2391 ifmgd->last_beacon_signal = rx_status->signal;
2392 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2393 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2394 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2395 ifmgd->last_cqm_event_signal = 0;
391a200a 2396 ifmgd->count_beacon_signal = 1;
615f7b9b 2397 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2398 } else {
2399 ifmgd->ave_beacon_signal =
2400 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2401 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2402 ifmgd->ave_beacon_signal) / 16;
391a200a 2403 ifmgd->count_beacon_signal++;
17e4ec14 2404 }
615f7b9b
MV		 2405
2406 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2407 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2408 int sig = ifmgd->ave_beacon_signal;
2409 int last_sig = ifmgd->last_ave_beacon_signal;
2410
2411 /*
2412 * if signal crosses either of the boundaries, invoke callback
2413 * with appropriate parameters
2414 */
2415 if (sig > ifmgd->rssi_max_thold &&
2416 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2417 ifmgd->last_ave_beacon_signal = sig;
2418 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2419 } else if (sig < ifmgd->rssi_min_thold &&
2420 (last_sig >= ifmgd->rssi_max_thold ||
2421 last_sig == 0)) {
2422 ifmgd->last_ave_beacon_signal = sig;
2423 drv_rssi_callback(local, RSSI_EVENT_LOW);
2424 }
2425 }
2426
17e4ec14 2427 if (bss_conf->cqm_rssi_thold &&
391a200a 2428 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2429 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2430 int sig = ifmgd->ave_beacon_signal / 16;
2431 int last_event = ifmgd->last_cqm_event_signal;
2432 int thold = bss_conf->cqm_rssi_thold;
2433 int hyst = bss_conf->cqm_rssi_hyst;
2434 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_LOW,
2440 GFP_KERNEL);
2441 } else if (sig > thold &&
2442 (last_event == 0 || sig > last_event + hyst)) {
2443 ifmgd->last_cqm_event_signal = sig;
2444 ieee80211_cqm_rssi_notify(
2445 &sdata->vif,
2446 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2447 GFP_KERNEL);
2448 }
2449 }
2450
b291ba11 2451 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2452 mlme_dbg_ratelimited(sdata,
2453 "cancelling probereq poll due to a received beacon\n");
925e64c3 2454 mutex_lock(&local->mtx);
b291ba11 2455 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2456 ieee80211_run_deferred_scan(local);
2457 mutex_unlock(&local->mtx);
2458
4e751843
JB		 2459 mutex_lock(&local->iflist_mtx);
2460 ieee80211_recalc_ps(local, -1);
2461 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2462 }
2463
b291ba11
JB		 2464 /*
2465 * Push the beacon loss detection into the future since
2466 * we are processing a beacon from the AP just now.
2467 */
d3a910a8 2468 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2469
d91f36db
JB		 2470 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2471 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2472 len - baselen, &elems,
2473 care_about_ies, ncrc);
2474
2475 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2476 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2477 ifmgd->aid);
d91f36db 2478
25c9c875 2479 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2480 if (directed_tim) {
572e0012 2481 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2482 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2483 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2484 ieee80211_hw_config(local,
2485 IEEE80211_CONF_CHANGE_PS);
2486 }
572e0012 2487 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2488 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2489 local->pspolling = true;
2490
2491 /*
2492 * Here is assumed that the driver will be
2493 * able to send ps-poll frame and receive a
2494 * response even though power save mode is
2495 * enabled, but some drivers might require
2496 * to disable power save here. This needs
2497 * to be investigated.
2498 */
2499 ieee80211_send_pspoll(local, sdata);
2500 }
a97b77b9
VN		 2501 }
2502 }
7a5158ef 2503
d8ec4433 2504 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2505 return;
2506 ifmgd->beacon_crc = ncrc;
d8ec4433 2507 ifmgd->beacon_crc_valid = true;
30196673 2508
7d25745d
JB		 2509 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2510 true);
2511
2512 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2513 elems.wmm_param_len))
2514 changed |= BSS_CHANGED_QOS;
2515
7a5158ef
JB		 2516 if (elems.erp_info && elems.erp_info_len >= 1) {
2517 erp_valid = true;
2518 erp_value = elems.erp_info[0];
2519 } else {
2520 erp_valid = false;
50c4afb9 2521 }
7a5158ef
JB		 2522 changed |= ieee80211_handle_bss_capability(sdata,
2523 le16_to_cpu(mgmt->u.beacon.capab_info),
2524 erp_valid, erp_value);
f0706e82 2525
d3c990fb 2526
074d46d1 2527 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2528 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2529 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2530
2531 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2532
24398e39
JB		 2533 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2534 bssid, true);
d3c990fb
RR		 2535 }
2536
8b19e6ca 2537 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2538 if (elems.country_elem) {
a8302de9
VT		 2539 /* TODO: IBSS also needs this */
2540 if (elems.pwr_constr_elem)
2541 ieee80211_handle_pwr_constr(sdata,
2542 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2543 elems.pwr_constr_elem,
2544 elems.pwr_constr_elem_len);
3f2355cb
LR		 2545 }
2546
471b3efd 2547 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2548}
2549
1fa57d01
JB		 2550void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2551 struct sk_buff *skb)
f0706e82 2552{
77fdaa12 2553 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2554 struct ieee80211_rx_status *rx_status;
f0706e82 2555 struct ieee80211_mgmt *mgmt;
66e67e41 2556 struct cfg80211_bss *bss = NULL;
77fdaa12 2557 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2558 u16 fc;
2559
f0706e82
JB		 2560 rx_status = (struct ieee80211_rx_status *) skb->cb;
2561 mgmt = (struct ieee80211_mgmt *) skb->data;
2562 fc = le16_to_cpu(mgmt->frame_control);
2563
77fdaa12
JB		 2564 mutex_lock(&ifmgd->mtx);
2565
66e67e41
JB		 2566 switch (fc & IEEE80211_FCTL_STYPE) {
2567 case IEEE80211_STYPE_BEACON:
2568 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2569 break;
2570 case IEEE80211_STYPE_PROBE_RESP:
2571 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2572 break;
2573 case IEEE80211_STYPE_AUTH:
2574 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2575 break;
2576 case IEEE80211_STYPE_DEAUTH:
2577 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2578 break;
2579 case IEEE80211_STYPE_DISASSOC:
2580 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2581 break;
2582 case IEEE80211_STYPE_ASSOC_RESP:
2583 case IEEE80211_STYPE_REASSOC_RESP:
2584 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2585 break;
2586 case IEEE80211_STYPE_ACTION:
2587 switch (mgmt->u.action.category) {
2588 case WLAN_CATEGORY_SPECTRUM_MGMT:
2589 ieee80211_sta_process_chanswitch(sdata,
2590 &mgmt->u.action.u.chan_switch.sw_elem,
2591 (void *)ifmgd->associated->priv,
2592 rx_status->mactime);
77fdaa12 2593 break;
77fdaa12 2594 }
77fdaa12 2595 }
77fdaa12
JB		 2596 mutex_unlock(&ifmgd->mtx);
2597
66e67e41
JB		 2598 switch (rma) {
2599 case RX_MGMT_NONE:
2600 /* no action */
2601 break;
2602 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2603 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2604 break;
2605 case RX_MGMT_CFG80211_DISASSOC:
2606 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2607 break;
2608 case RX_MGMT_CFG80211_RX_AUTH:
2609 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2610 break;
2611 case RX_MGMT_CFG80211_RX_ASSOC:
2612 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2613 break;
2614 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2615 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2616 break;
2617 default:
2618 WARN(1, "unexpected: %d", rma);
b054b747 2619 }
f0706e82
JB		 2620}
2621
9c6bd790 2622static void ieee80211_sta_timer(unsigned long data)
f0706e82 2623{
60f8b39c
JB		 2624 struct ieee80211_sub_if_data *sdata =
2625 (struct ieee80211_sub_if_data *) data;
46900298 2626 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2627 struct ieee80211_local *local = sdata->local;
f0706e82 2628
5bb644a0
JB		 2629 if (local->quiescing) {
2630 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2631 return;
2632 }
2633
64592c8f 2634 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2635}
2636
04ac3c0e 2637static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2638 u8 *bssid, u8 reason)
04ac3c0e
FF		 2639{
2640 struct ieee80211_local *local = sdata->local;
2641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2642 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2643
37ad3888
JB		 2644 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2645 false, frame_buf);
04ac3c0e 2646 mutex_unlock(&ifmgd->mtx);
37ad3888 2647
04ac3c0e
FF		 2648 /*
2649 * must be outside lock due to cfg80211,
2650 * but that's not a problem.
2651 */
5fef7dbc 2652 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2653
2654 mutex_lock(&local->mtx);
2655 ieee80211_recalc_idle(local);
2656 mutex_unlock(&local->mtx);
2657
04ac3c0e
FF		 2658 mutex_lock(&ifmgd->mtx);
2659}
2660
66e67e41
JB		 2661static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2662{
2663 struct ieee80211_local *local = sdata->local;
2664 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2665 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2666
2667 lockdep_assert_held(&ifmgd->mtx);
2668
2669 if (WARN_ON_ONCE(!auth_data))
2670 return -EINVAL;
2671
66e67e41
JB		 2672 auth_data->tries++;
2673
2674 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2675 sdata_info(sdata, "authentication with %pM timed out\n",
2676 auth_data->bss->bssid);
66e67e41
JB		 2677
2678 /*
2679 * Most likely AP is not in the range so remove the
2680 * bss struct for that AP.
2681 */
2682 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2683
2684 return -ETIMEDOUT;
2685 }
2686
a1845fc7
JB		 2687 drv_mgd_prepare_tx(local, sdata);
2688
66e67e41 2689 if (auth_data->bss->proberesp_ies) {
bdcbd8e0
JB		 2690 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2691 auth_data->bss->bssid, auth_data->tries,
2692 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2693
2694 auth_data->expected_transaction = 2;
2695 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2696 auth_data->ie, auth_data->ie_len,
2697 auth_data->bss->bssid,
2698 auth_data->bss->bssid, NULL, 0, 0);
2699 } else {
2700 const u8 *ssidie;
2701
bdcbd8e0
JB		 2702 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2703 auth_data->bss->bssid, auth_data->tries,
2704 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2705
2706 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2707 if (!ssidie)
2708 return -EINVAL;
2709 /*
2710 * Direct probe is sent to broadcast address as some APs
2711 * will not answer to direct packet in unassociated state.
2712 */
2713 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2714 NULL, 0, (u32) -1, true, false);
2715 }
2716
2717 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2718 run_again(ifmgd, auth_data->timeout);
2719
2720 return 0;
2721}
2722
2723static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2724{
2725 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2726 struct ieee80211_local *local = sdata->local;
2727
2728 lockdep_assert_held(&sdata->u.mgd.mtx);
2729
66e67e41
JB		 2730 assoc_data->tries++;
2731 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2732 sdata_info(sdata, "association with %pM timed out\n",
2733 assoc_data->bss->bssid);
66e67e41
JB		 2734
2735 /*
2736 * Most likely AP is not in the range so remove the
2737 * bss struct for that AP.
2738 */
2739 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2740
2741 return -ETIMEDOUT;
2742 }
2743
bdcbd8e0
JB		 2744 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2745 assoc_data->bss->bssid, assoc_data->tries,
2746 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2747 ieee80211_send_assoc(sdata);
2748
2749 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2750 run_again(&sdata->u.mgd, assoc_data->timeout);
2751
2752 return 0;
2753}
2754
1fa57d01 2755void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2756{
9c6bd790 2757 struct ieee80211_local *local = sdata->local;
1fa57d01 2758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2759
77fdaa12
JB		 2760 mutex_lock(&ifmgd->mtx);
2761
66e67e41
JB		 2762 if (ifmgd->auth_data &&
2763 time_after(jiffies, ifmgd->auth_data->timeout)) {
2764 if (ifmgd->auth_data->done) {
2765 /*
2766 * ok ... we waited for assoc but userspace didn't,
2767 * so let's just kill the auth data
2768 */
2769 ieee80211_destroy_auth_data(sdata, false);
2770 } else if (ieee80211_probe_auth(sdata)) {
2771 u8 bssid[ETH_ALEN];
2772
2773 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2774
2775 ieee80211_destroy_auth_data(sdata, false);
2776
2777 mutex_unlock(&ifmgd->mtx);
2778 cfg80211_send_auth_timeout(sdata->dev, bssid);
2779 mutex_lock(&ifmgd->mtx);
2780 }
2781 } else if (ifmgd->auth_data)
2782 run_again(ifmgd, ifmgd->auth_data->timeout);
2783
2784 if (ifmgd->assoc_data &&
2785 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2786 if (!ifmgd->assoc_data->have_beacon ||
2787 ieee80211_do_assoc(sdata)) {
2788 u8 bssid[ETH_ALEN];
2789
2790 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2791
2792 ieee80211_destroy_assoc_data(sdata, false);
2793
2794 mutex_unlock(&ifmgd->mtx);
2795 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2796 mutex_lock(&ifmgd->mtx);
2797 }
2798 } else if (ifmgd->assoc_data)
2799 run_again(ifmgd, ifmgd->assoc_data->timeout);
2800
b291ba11
JB		 2801 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2802 IEEE80211_STA_CONNECTION_POLL) &&
2803 ifmgd->associated) {
a43abf29 2804 u8 bssid[ETH_ALEN];
72a8a3ed 2805 int max_tries;
a43abf29 2806
0c1ad2ca 2807 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2808
72a8a3ed 2809 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2810 max_tries = max_nullfunc_tries;
72a8a3ed 2811 else
180205bd 2812 max_tries = max_probe_tries;
72a8a3ed 2813
4e5ff376
FF		 2814 /* ACK received for nullfunc probing frame */
2815 if (!ifmgd->probe_send_count)
2816 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2817 else if (ifmgd->nullfunc_failed) {
2818 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2819 mlme_dbg(sdata,
2820 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2821 bssid, ifmgd->probe_send_count,
2822 max_tries);
04ac3c0e
FF		 2823 ieee80211_mgd_probe_ap_send(sdata);
2824 } else {
bdcbd8e0
JB		 2825 mlme_dbg(sdata,
2826 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2827 bssid);
95acac61
JB		 2828 ieee80211_sta_connection_lost(sdata, bssid,
2829 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2830 }
2831 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2832 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2833 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2834 mlme_dbg(sdata,
2835 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2836 bssid, probe_wait_ms);
95acac61
JB		 2837 ieee80211_sta_connection_lost(sdata, bssid,
2838 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2839 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2840 mlme_dbg(sdata,
2841 "No probe response from AP %pM after %dms, try %d/%i\n",
2842 bssid, probe_wait_ms,
2843 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2844 ieee80211_mgd_probe_ap_send(sdata);
2845 } else {
b291ba11
JB		 2846 /*
2847 * We actually lost the connection ... or did we?
2848 * Let's make sure!
2849 */
b38afa87
BG		 2850 wiphy_debug(local->hw.wiphy,
2851 "%s: No probe response from AP %pM"
2852 " after %dms, disconnecting.\n",
2853 sdata->name,
180205bd 2854 bssid, probe_wait_ms);
04ac3c0e 2855
95acac61
JB		 2856 ieee80211_sta_connection_lost(sdata, bssid,
2857 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2858 }
2859 }
2860
77fdaa12 2861 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2862
2863 mutex_lock(&local->mtx);
2864 ieee80211_recalc_idle(local);
2865 mutex_unlock(&local->mtx);
f0706e82
JB		 2866}
2867
b291ba11
JB		 2868static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2869{
2870 struct ieee80211_sub_if_data *sdata =
2871 (struct ieee80211_sub_if_data *) data;
2872 struct ieee80211_local *local = sdata->local;
2873
2874 if (local->quiescing)
2875 return;
2876
1e4dcd01
JO		 2877 ieee80211_queue_work(&sdata->local->hw,
2878 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2879}
2880
2881static void ieee80211_sta_conn_mon_timer(unsigned long data)
2882{
2883 struct ieee80211_sub_if_data *sdata =
2884 (struct ieee80211_sub_if_data *) data;
2885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2886 struct ieee80211_local *local = sdata->local;
2887
2888 if (local->quiescing)
2889 return;
2890
42935eca 2891 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2892}
2893
2894static void ieee80211_sta_monitor_work(struct work_struct *work)
2895{
2896 struct ieee80211_sub_if_data *sdata =
2897 container_of(work, struct ieee80211_sub_if_data,
2898 u.mgd.monitor_work);
2899
2900 ieee80211_mgd_probe_ap(sdata, false);
2901}
2902
9c6bd790
JB		 2903static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2904{
494f1fe5
EP		 2905 u32 flags;
2906
ad935687 2907 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2908 __ieee80211_stop_poll(sdata);
ad935687 2909
b291ba11 2910 /* let's probe the connection once */
494f1fe5
EP		 2911 flags = sdata->local->hw.flags;
2912 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2913 ieee80211_queue_work(&sdata->local->hw,
2914 &sdata->u.mgd.monitor_work);
b291ba11 2915 /* and do all the other regular work too */
64592c8f 2916 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2917 }
9c6bd790 2918}
f0706e82 2919
5bb644a0
JB		 2920#ifdef CONFIG_PM
2921void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2922{
2923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2924
2925 /*
2926 * we need to use atomic bitops for the running bits
2927 * only because both timers might fire at the same
2928 * time -- the code here is properly synchronised.
2929 */
2930
d1f5b7a3
JB		 2931 cancel_work_sync(&ifmgd->request_smps_work);
2932
0ecfe806 2933 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2934 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2935 if (del_timer_sync(&ifmgd->timer))
2936 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2937
2938 cancel_work_sync(&ifmgd->chswitch_work);
2939 if (del_timer_sync(&ifmgd->chswitch_timer))
2940 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2941
b291ba11
JB		 2942 /* these will just be re-established on connection */
2943 del_timer_sync(&ifmgd->conn_mon_timer);
2944 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2945}
2946
2947void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2948{
2949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2950
676b58c2
RM		 2951 if (!ifmgd->associated)
2952 return;
2953
95acac61
JB		 2954 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2955 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2956 mutex_lock(&ifmgd->mtx);
2957 if (ifmgd->associated) {
bdcbd8e0
JB		 2958 mlme_dbg(sdata,
2959 "driver requested disconnect after resume\n");
95acac61
JB		 2960 ieee80211_sta_connection_lost(sdata,
2961 ifmgd->associated->bssid,
2962 WLAN_REASON_UNSPECIFIED);
2963 mutex_unlock(&ifmgd->mtx);
2964 return;
2965 }
2966 mutex_unlock(&ifmgd->mtx);
2967 }
2968
5bb644a0
JB		 2969 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2970 add_timer(&ifmgd->timer);
2971 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2972 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2973 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2974
2975 mutex_lock(&sdata->local->mtx);
46090979 2976 ieee80211_restart_sta_timer(sdata);
925e64c3 2977 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2978}
2979#endif
2980
9c6bd790
JB		 2981/* interface setup */
2982void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2983{
46900298 2984 struct ieee80211_if_managed *ifmgd;
988c0f72 2985
46900298 2986 ifmgd = &sdata->u.mgd;
b291ba11 2987 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2988 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2989 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2990 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2991 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2992 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2993 (unsigned long) sdata);
b291ba11
JB		 2994 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2995 (unsigned long) sdata);
2996 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2997 (unsigned long) sdata);
46900298 2998 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2999 (unsigned long) sdata);
9c6bd790 3000
ab1faead 3001 ifmgd->flags = 0;
1478acb3 3002 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3003 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3004 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3005
77fdaa12 3006 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3007
3008 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3009 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3010 else
3011 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3012}
3013
77fdaa12
JB		 3014/* scan finished notification */
3015void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3016{
31ee67a1 3017 struct ieee80211_sub_if_data *sdata;
60f8b39c 3018
77fdaa12
JB		 3019 /* Restart STA timers */
3020 rcu_read_lock();
3021 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3022 ieee80211_restart_sta_timer(sdata);
3023 rcu_read_unlock();
3024}
60f8b39c 3025
77fdaa12
JB		 3026int ieee80211_max_network_latency(struct notifier_block *nb,
3027 unsigned long data, void *dummy)
3028{
3029 s32 latency_usec = (s32) data;
3030 struct ieee80211_local *local =
3031 container_of(nb, struct ieee80211_local,
3032 network_latency_notifier);
1fa6f4af 3033
77fdaa12
JB		 3034 mutex_lock(&local->iflist_mtx);
3035 ieee80211_recalc_ps(local, latency_usec);
3036 mutex_unlock(&local->iflist_mtx);
dfe67012 3037
77fdaa12 3038 return 0;
9c6bd790
JB		 3039}
3040
a1cf775d 3041static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 3042 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 3043{
3044 struct ieee80211_local *local = sdata->local;
3045 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3046 struct ieee80211_bss *bss = (void *)cbss->priv;
6df653c7 3047 struct sta_info *sta = NULL;
a1cf775d
JB		 3048 bool have_sta = false;
3049 int err;
24398e39
JB		 3050 int ht_cfreq;
3051 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3052 const u8 *ht_oper_ie;
3053 const struct ieee80211_ht_operation *ht_oper = NULL;
3054 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3055
3056 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3057 return -EINVAL;
3058
3059 if (assoc) {
3060 rcu_read_lock();
5d6a1b06 3061 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3062 rcu_read_unlock();
3063 }
3064
3065 if (!have_sta) {
5d6a1b06 3066 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3067 if (!sta)
3068 return -ENOMEM;
3069 }
3070
3071 mutex_lock(&local->mtx);
3072 ieee80211_recalc_idle(sdata->local);
3073 mutex_unlock(&local->mtx);
3074
3075 /* switch to the right channel */
24398e39
JB		 3076 sband = local->hw.wiphy->bands[cbss->channel->band];
3077
3078 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3079
3080 if (sband->ht_cap.ht_supported) {
3081 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3082 cbss->information_elements,
3083 cbss->len_information_elements);
3084 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3085 ht_oper = (void *)(ht_oper_ie + 2);
3086 }
3087
3088 if (ht_oper) {
3089 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3090 cbss->channel->band);
3091 /* check that channel matches the right operating channel */
3092 if (cbss->channel->center_freq != ht_cfreq) {
3093 /*
3094 * It's possible that some APs are confused here;
3095 * Netgear WNDR3700 sometimes reports 4 higher than
3096 * the actual channel in association responses, but
3097 * since we look at probe response/beacon data here
3098 * it should be OK.
3099 */
bdcbd8e0
JB		 3100 sdata_info(sdata,
3101 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3102 cbss->channel->center_freq,
3103 ht_cfreq, ht_oper->primary_chan,
3104 cbss->channel->band);
24398e39
JB		 3105 ht_oper = NULL;
3106 }
3107 }
3108
3109 if (ht_oper) {
3110 channel_type = NL80211_CHAN_HT20;
3111
3112 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3113 switch (ht_oper->ht_param &
3114 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3115 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3116 channel_type = NL80211_CHAN_HT40PLUS;
3117 break;
3118 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3119 channel_type = NL80211_CHAN_HT40MINUS;
3120 break;
3121 }
3122 }
3123 }
3124
3125 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3126 /* can only fail due to HT40+/- mismatch */
3127 channel_type = NL80211_CHAN_HT20;
bdcbd8e0
JB		 3128 sdata_info(sdata,
3129 "disabling 40 MHz due to multi-vif mismatch\n");
24398e39
JB		 3130 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3131 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3132 channel_type));
3133 }
3134
5d6a1b06 3135 local->oper_channel = cbss->channel;
6aee4ca3 3136 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
a1cf775d 3137
6df653c7 3138 if (sta) {
5d6a1b06
JB		 3139 u32 rates = 0, basic_rates = 0;
3140 bool have_higher_than_11mbit;
3141 int min_rate = INT_MAX, min_rate_index = -1;
3142
5d6a1b06
JB		 3143 ieee80211_get_rates(sband, bss->supp_rates,
3144 bss->supp_rates_len,
3145 &rates, &basic_rates,
3146 &have_higher_than_11mbit,
3147 &min_rate, &min_rate_index);
3148
3149 /*
3150 * This used to be a workaround for basic rates missing
3151 * in the association response frame. Now that we no
3152 * longer use the basic rates from there, it probably
3153 * doesn't happen any more, but keep the workaround so
3154 * in case some *other* APs are buggy in different ways
3155 * we can connect -- with a warning.
3156 */
3157 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3158 sdata_info(sdata,
3159 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3160 basic_rates = BIT(min_rate_index);
3161 }
3162
3163 sta->sta.supp_rates[cbss->channel->band] = rates;
3164 sdata->vif.bss_conf.basic_rates = basic_rates;
3165
3166 /* cf. IEEE 802.11 9.2.12 */
3167 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3168 have_higher_than_11mbit)
3169 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3170 else
3171 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3172
3173 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3174
8c358bcd
JB		 3175 /* set timing information */
3176 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3177 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3178 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3179
3180 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3181 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3182 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3183 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3184
3185 if (assoc)
3186 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3187
3188 err = sta_info_insert(sta);
3189 sta = NULL;
3190 if (err) {
bdcbd8e0
JB		 3191 sdata_info(sdata,
3192 "failed to insert STA entry for the AP (error %d)\n",
3193 err);
a1cf775d
JB		 3194 return err;
3195 }
3196 } else
b203ca39 3197 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3198
3199 return 0;
3200}
3201
77fdaa12
JB		 3202/* config hooks */
3203int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3204 struct cfg80211_auth_request *req)
9c6bd790 3205{
66e67e41
JB		 3206 struct ieee80211_local *local = sdata->local;
3207 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3208 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3209 u16 auth_alg;
66e67e41
JB		 3210 int err;
3211
3212 /* prepare auth data structure */
9c6bd790 3213
77fdaa12
JB		 3214 switch (req->auth_type) {
3215 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3216 auth_alg = WLAN_AUTH_OPEN;
3217 break;
3218 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3219 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3220 return -EOPNOTSUPP;
77fdaa12
JB		 3221 auth_alg = WLAN_AUTH_SHARED_KEY;
3222 break;
3223 case NL80211_AUTHTYPE_FT:
3224 auth_alg = WLAN_AUTH_FT;
3225 break;
3226 case NL80211_AUTHTYPE_NETWORK_EAP:
3227 auth_alg = WLAN_AUTH_LEAP;
3228 break;
3229 default:
3230 return -EOPNOTSUPP;
60f8b39c 3231 }
77fdaa12 3232
66e67e41
JB		 3233 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3234 if (!auth_data)
9c6bd790 3235 return -ENOMEM;
77fdaa12 3236
66e67e41 3237 auth_data->bss = req->bss;
77fdaa12
JB		 3238
3239 if (req->ie && req->ie_len) {
66e67e41
JB		 3240 memcpy(auth_data->ie, req->ie, req->ie_len);
3241 auth_data->ie_len = req->ie_len;
9c6bd790 3242 }
77fdaa12 3243
fffd0934 3244 if (req->key && req->key_len) {
66e67e41
JB		 3245 auth_data->key_len = req->key_len;
3246 auth_data->key_idx = req->key_idx;
3247 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3248 }
3249
66e67e41 3250 auth_data->algorithm = auth_alg;
60f8b39c 3251
66e67e41 3252 /* try to authenticate/probe */
2a33bee2 3253
66e67e41 3254 mutex_lock(&ifmgd->mtx);
2a33bee2 3255
66e67e41
JB		 3256 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3257 ifmgd->assoc_data) {
3258 err = -EBUSY;
3259 goto err_free;
2a33bee2
GE		 3260 }
3261
66e67e41
JB		 3262 if (ifmgd->auth_data)
3263 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3264
66e67e41
JB		 3265 /* prep auth_data so we don't go into idle on disassoc */
3266 ifmgd->auth_data = auth_data;
af6b6374 3267
66e67e41 3268 if (ifmgd->associated)
37ad3888 3269 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3270
bdcbd8e0 3271 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3272
a1cf775d
JB		 3273 err = ieee80211_prep_connection(sdata, req->bss, false);
3274 if (err)
66e67e41 3275 goto err_clear;
af6b6374 3276
66e67e41
JB		 3277 err = ieee80211_probe_auth(sdata);
3278 if (err) {
66e67e41
JB		 3279 sta_info_destroy_addr(sdata, req->bss->bssid);
3280 goto err_clear;
3281 }
3282
3283 /* hold our own reference */
3284 cfg80211_ref_bss(auth_data->bss);
3285 err = 0;
3286 goto out_unlock;
3287
3288 err_clear:
3289 ifmgd->auth_data = NULL;
3290 err_free:
3291 kfree(auth_data);
3292 out_unlock:
3293 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3294
66e67e41 3295 return err;
af6b6374
JB		 3296}
3297
77fdaa12
JB		 3298int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3299 struct cfg80211_assoc_request *req)
f0706e82 3300{
66e67e41 3301 struct ieee80211_local *local = sdata->local;
77fdaa12 3302 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3303 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3304 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3305 struct ieee80211_supported_band *sband;
9dde6423 3306 const u8 *ssidie, *ht_ie;
2a33bee2 3307 int i, err;
f0706e82 3308
66e67e41
JB		 3309 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3310 if (!ssidie)
3311 return -EINVAL;
3312
3313 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3314 if (!assoc_data)
3315 return -ENOMEM;
3316
77fdaa12 3317 mutex_lock(&ifmgd->mtx);
9c87ba67 3318
66e67e41 3319 if (ifmgd->associated)
37ad3888 3320 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3321
3322 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3323 err = -EBUSY;
3324 goto err_free;
af6b6374 3325 }
77fdaa12 3326
66e67e41
JB		 3327 if (ifmgd->assoc_data) {
3328 err = -EBUSY;
3329 goto err_free;
3330 }
77fdaa12 3331
66e67e41
JB		 3332 if (ifmgd->auth_data) {
3333 bool match;
3334
3335 /* keep sta info, bssid if matching */
b203ca39 3336 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3337 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3338 }
3339
66e67e41
JB		 3340 /* prepare assoc data */
3341
77fdaa12 3342 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3343 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
d545daba 3344 ifmgd->flags &= ~IEEE80211_STA_DISABLE_VHT;
77fdaa12 3345
d8ec4433
JO		 3346 ifmgd->beacon_crc_valid = false;
3347
de5036aa
JB		 3348 /*
3349 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3350 * We still associate in non-HT mode (11a/b/g) if any one of these
3351 * ciphers is configured as pairwise.
3352 * We can set this to true for non-11n hardware, that'll be checked
3353 * separately along with the peer capabilities.
3354 */
1c4cb928 3355 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3356 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3357 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3358 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3359 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba 3360 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3361 netdev_info(sdata->dev,
d545daba 3362 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3363 }
3364 }
77fdaa12 3365
d545daba 3366 if (req->flags & ASSOC_REQ_DISABLE_HT) {
ef96a842 3367 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba
MP		 3368 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3369 }
ef96a842 3370
4e74bfdb
JB		 3371 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3372 sband = local->hw.wiphy->bands[req->bss->channel->band];
3373 if (!sband->ht_cap.ht_supported ||
1c4cb928 3374 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3375 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3376 netdev_info(sdata->dev,
3377 "disabling HT as WMM/QoS is not supported\n");
3378 }
4e74bfdb 3379
d545daba
MP		 3380 /* disable VHT if we don't support it or the AP doesn't use WMM */
3381 if (!sband->vht_cap.vht_supported ||
3382 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3383 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3384 netdev_info(sdata->dev,
3385 "disabling VHT as WMM/QoS is not supported\n");
3386 }
3387
ef96a842
BG		 3388 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3389 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3390 sizeof(ifmgd->ht_capa_mask));
3391
77fdaa12 3392 if (req->ie && req->ie_len) {
66e67e41
JB		 3393 memcpy(assoc_data->ie, req->ie, req->ie_len);
3394 assoc_data->ie_len = req->ie_len;
3395 }
f679f65d 3396
66e67e41 3397 assoc_data->bss = req->bss;
f679f65d 3398
af6b6374
JB		 3399 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3400 if (ifmgd->powersave)
3401 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3402 else
3403 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3404 } else
3405 ifmgd->ap_smps = ifmgd->req_smps;
3406
66e67e41 3407 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3408 assoc_data->wmm = bss->wmm_used &&
3409 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3410 assoc_data->supp_rates = bss->supp_rates;
3411 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3412
3413 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3414 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3415 assoc_data->ap_ht_param =
3416 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3417 else
3418 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3419
ab13315a
KV		 3420 if (bss->wmm_used && bss->uapsd_supported &&
3421 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3422 assoc_data->uapsd = true;
ab13315a
KV		 3423 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3424 } else {
76f0303d 3425 assoc_data->uapsd = false;
ab13315a
KV		 3426 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3427 }
3428
66e67e41
JB		 3429 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3430 assoc_data->ssid_len = ssidie[1];
63f170e0 3431
77fdaa12 3432 if (req->prev_bssid)
66e67e41 3433 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3434
3435 if (req->use_mfp) {
3436 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3437 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3438 } else {
3439 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3440 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3441 }
3442
3443 if (req->crypto.control_port)
3444 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3445 else
3446 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3447
a621fa4d
JB		 3448 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3449 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3450
66e67e41
JB		 3451 /* kick off associate process */
3452
3453 ifmgd->assoc_data = assoc_data;
3454
a1cf775d
JB		 3455 err = ieee80211_prep_connection(sdata, req->bss, true);
3456 if (err)
3457 goto err_clear;
66e67e41
JB		 3458
3459 if (!bss->dtim_period &&
3460 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3461 /*
3462 * Wait up to one beacon interval ...
3463 * should this be more if we miss one?
3464 */
bdcbd8e0
JB		 3465 sdata_info(sdata, "waiting for beacon from %pM\n",
3466 ifmgd->bssid);
3f9768a5 3467 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3468 } else {
3469 assoc_data->have_beacon = true;
3470 assoc_data->sent_assoc = false;
3471 assoc_data->timeout = jiffies;
3472 }
3473 run_again(ifmgd, assoc_data->timeout);
3474
fcff4f10
PS		 3475 if (bss->corrupt_data) {
3476 char *corrupt_type = "data";
3477 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3478 if (bss->corrupt_data &
3479 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3480 corrupt_type = "beacon and probe response";
3481 else
3482 corrupt_type = "beacon";
3483 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3484 corrupt_type = "probe response";
bdcbd8e0
JB		 3485 sdata_info(sdata, "associating with AP with corrupt %s\n",
3486 corrupt_type);
fcff4f10
PS		 3487 }
3488
66e67e41
JB		 3489 err = 0;
3490 goto out;
3491 err_clear:
3492 ifmgd->assoc_data = NULL;
3493 err_free:
3494 kfree(assoc_data);
3495 out:
3496 mutex_unlock(&ifmgd->mtx);
3497
3498 return err;
f0706e82
JB		 3499}
3500
77fdaa12 3501int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3502 struct cfg80211_deauth_request *req)
f0706e82 3503{
46900298 3504 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3505 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3506
77fdaa12
JB		 3507 mutex_lock(&ifmgd->mtx);
3508
37ad3888 3509 if (ifmgd->auth_data) {
66e67e41 3510 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3511 mutex_unlock(&ifmgd->mtx);
66e67e41 3512 return 0;
af6b6374 3513 }
77fdaa12 3514
bdcbd8e0
JB		 3515 sdata_info(sdata,
3516 "deauthenticating from %pM by local choice (reason=%d)\n",
3517 req->bssid, req->reason_code);
0ff71613 3518
37ad3888 3519 if (ifmgd->associated &&
8c7d857c 3520 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
37ad3888 3521 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3522 req->reason_code, true, frame_buf);
8c7d857c
EG		 3523 } else {
3524 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 3525 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3526 IEEE80211_STYPE_DEAUTH,
3527 req->reason_code, true,
3528 frame_buf);
8c7d857c
EG		 3529 }
3530
37ad3888
JB		 3531 mutex_unlock(&ifmgd->mtx);
3532
5fef7dbc 3533 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3534
7da7cc1d 3535 mutex_lock(&sdata->local->mtx);
bc83b681 3536 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3537 mutex_unlock(&sdata->local->mtx);
bc83b681 3538
f0706e82
JB		 3539 return 0;
3540}
84363e6e 3541
77fdaa12 3542int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3543 struct cfg80211_disassoc_request *req)
9c6bd790 3544{
77fdaa12 3545 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3546 u8 bssid[ETH_ALEN];
5fef7dbc 3547 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3548
77fdaa12 3549 mutex_lock(&ifmgd->mtx);
10f644a4 3550
8d8b261a
JB		 3551 /*
3552 * cfg80211 should catch this ... but it's racy since
3553 * we can receive a disassoc frame, process it, hand it
3554 * to cfg80211 while that's in a locked section already
3555 * trying to tell us that the user wants to disconnect.
3556 */
0c1ad2ca 3557 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3558 mutex_unlock(&ifmgd->mtx);
3559 return -ENOLINK;
3560 }
3561
bdcbd8e0
JB		 3562 sdata_info(sdata,
3563 "disassociating from %pM by local choice (reason=%d)\n",
3564 req->bss->bssid, req->reason_code);
0ff71613 3565
e69e95db 3566 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3567 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3568 req->reason_code, !req->local_state_change,
3569 frame_buf);
77fdaa12 3570 mutex_unlock(&ifmgd->mtx);
10f644a4 3571
5fef7dbc 3572 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3573
7da7cc1d 3574 mutex_lock(&sdata->local->mtx);
bc83b681 3575 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3576 mutex_unlock(&sdata->local->mtx);
bc83b681 3577
10f644a4
JB		 3578 return 0;
3579}
026331c4 3580
afa762f6 3581void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3582{
3583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3584
3585 mutex_lock(&ifmgd->mtx);
3586 if (ifmgd->assoc_data)
3587 ieee80211_destroy_assoc_data(sdata, false);
3588 if (ifmgd->auth_data)
3589 ieee80211_destroy_auth_data(sdata, false);
3590 del_timer_sync(&ifmgd->timer);
3591 mutex_unlock(&ifmgd->mtx);
3592}
3593
a97c13c3
JO		 3594void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3595 enum nl80211_cqm_rssi_threshold_event rssi_event,
3596 gfp_t gfp)
3597{
3598 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3599
b5878a2d
JB		 3600 trace_api_cqm_rssi_notify(sdata, rssi_event);
3601
a97c13c3
JO		 3602 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3603}
3604EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
ubuntu-zesty-kernel mirror