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mac80211: don't react to beacon loss if HW monitoring
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
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
JB		 612
613 drv_mgd_prepare_tx(local, sdata);
614
d5cdfacb 615 ieee80211_tx_skb(sdata, skb);
5fef7dbc 616 }
9ac19a90
JB		 617}
618
572e0012
KV		 619void ieee80211_send_pspoll(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata)
621{
572e0012
KV		 622 struct ieee80211_pspoll *pspoll;
623 struct sk_buff *skb;
572e0012 624
d8cd189e
KV		 625 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
626 if (!skb)
572e0012 627 return;
572e0012 628
d8cd189e
KV		 629 pspoll = (struct ieee80211_pspoll *) skb->data;
630 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 631
62ae67be
JB		 632 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
633 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 634}
635
965bedad
JB		 636void ieee80211_send_nullfunc(struct ieee80211_local *local,
637 struct ieee80211_sub_if_data *sdata,
638 int powersave)
639{
640 struct sk_buff *skb;
d8cd189e 641 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 643
d8cd189e
KV		 644 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
645 if (!skb)
965bedad 646 return;
965bedad 647
d8cd189e 648 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 649 if (powersave)
d8cd189e 650 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 651
62ae67be 652 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 653 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
654 IEEE80211_STA_CONNECTION_POLL))
655 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
656
62ae67be 657 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 658}
659
d524215f
FF		 660static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
661 struct ieee80211_sub_if_data *sdata)
662{
663 struct sk_buff *skb;
664 struct ieee80211_hdr *nullfunc;
665 __le16 fc;
666
667 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
668 return;
669
670 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 671 if (!skb)
d524215f 672 return;
d15b8459 673
d524215f
FF		 674 skb_reserve(skb, local->hw.extra_tx_headroom);
675
676 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
677 memset(nullfunc, 0, 30);
678 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
679 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
680 nullfunc->frame_control = fc;
681 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
682 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
683 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
684 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
685
686 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
687 ieee80211_tx_skb(sdata, skb);
688}
689
cc32abd4
JB		 690/* spectrum management related things */
691static void ieee80211_chswitch_work(struct work_struct *work)
692{
693 struct ieee80211_sub_if_data *sdata =
694 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
696
9607e6b6 697 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 698 return;
699
77fdaa12
JB		 700 mutex_lock(&ifmgd->mtx);
701 if (!ifmgd->associated)
702 goto out;
cc32abd4
JB		 703
704 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 705 if (!sdata->local->ops->channel_switch) {
706 /* call "hw_config" only if doing sw channel switch */
707 ieee80211_hw_config(sdata->local,
708 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 709 } else {
710 /* update the device channel directly */
711 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 712 }
77fdaa12 713
cc32abd4 714 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 715 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 716
cc32abd4
JB		 717 ieee80211_wake_queues_by_reason(&sdata->local->hw,
718 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 719 out:
720 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
721 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 722}
723
5ce6e438
JB		 724void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
725{
726 struct ieee80211_sub_if_data *sdata;
727 struct ieee80211_if_managed *ifmgd;
728
729 sdata = vif_to_sdata(vif);
730 ifmgd = &sdata->u.mgd;
731
732 trace_api_chswitch_done(sdata, success);
733 if (!success) {
734 /*
735 * If the channel switch was not successful, stay
736 * around on the old channel. We currently lack
737 * good handling of this situation, possibly we
738 * should just drop the association.
739 */
740 sdata->local->csa_channel = sdata->local->oper_channel;
741 }
742
743 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
744}
745EXPORT_SYMBOL(ieee80211_chswitch_done);
746
cc32abd4
JB		 747static void ieee80211_chswitch_timer(unsigned long data)
748{
749 struct ieee80211_sub_if_data *sdata =
750 (struct ieee80211_sub_if_data *) data;
751 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
752
5bb644a0
JB		 753 if (sdata->local->quiescing) {
754 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
755 return;
756 }
757
42935eca 758 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 759}
760
761void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
762 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 763 struct ieee80211_bss *bss,
764 u64 timestamp)
cc32abd4 765{
0c1ad2ca
JB		 766 struct cfg80211_bss *cbss =
767 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 768 struct ieee80211_channel *new_ch;
769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 770 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
771 cbss->channel->band);
cc32abd4 772
77fdaa12
JB		 773 ASSERT_MGD_MTX(ifmgd);
774
775 if (!ifmgd->associated)
cc32abd4
JB		 776 return;
777
fbe9c429 778 if (sdata->local->scanning)
cc32abd4
JB		 779 return;
780
781 /* Disregard subsequent beacons if we are already running a timer
782 processing a CSA */
783
784 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
785 return;
786
787 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
788 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
789 return;
790
791 sdata->local->csa_channel = new_ch;
792
5ce6e438
JB		 793 if (sdata->local->ops->channel_switch) {
794 /* use driver's channel switch callback */
795 struct ieee80211_channel_switch ch_switch;
796 memset(&ch_switch, 0, sizeof(ch_switch));
797 ch_switch.timestamp = timestamp;
798 if (sw_elem->mode) {
799 ch_switch.block_tx = true;
800 ieee80211_stop_queues_by_reason(&sdata->local->hw,
801 IEEE80211_QUEUE_STOP_REASON_CSA);
802 }
803 ch_switch.channel = new_ch;
804 ch_switch.count = sw_elem->count;
805 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
806 drv_channel_switch(sdata->local, &ch_switch);
807 return;
808 }
809
810 /* channel switch handled in software */
cc32abd4 811 if (sw_elem->count <= 1) {
42935eca 812 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 813 } else {
9feaddc7
WYG		 814 if (sw_elem->mode)
815 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 816 IEEE80211_QUEUE_STOP_REASON_CSA);
817 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
818 mod_timer(&ifmgd->chswitch_timer,
819 jiffies +
820 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 821 cbss->beacon_interval));
cc32abd4
JB		 822 }
823}
824
825static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
826 u16 capab_info, u8 *pwr_constr_elem,
827 u8 pwr_constr_elem_len)
828{
829 struct ieee80211_conf *conf = &sdata->local->hw.conf;
830
831 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
832 return;
833
834 /* Power constraint IE length should be 1 octet */
835 if (pwr_constr_elem_len != 1)
836 return;
837
a48b13ac 838 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 839 (*pwr_constr_elem != sdata->local->power_constr_level)) {
840 sdata->local->power_constr_level = *pwr_constr_elem;
841 ieee80211_hw_config(sdata->local, 0);
842 }
843}
844
f90754c1
JO		 845void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
846{
847 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
848 struct ieee80211_local *local = sdata->local;
849 struct ieee80211_conf *conf = &local->hw.conf;
850
851 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
852 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
853 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
854
855 local->disable_dynamic_ps = false;
856 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
857}
858EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
859
860void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
861{
862 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
863 struct ieee80211_local *local = sdata->local;
864 struct ieee80211_conf *conf = &local->hw.conf;
865
866 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
867 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
868 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
869
870 local->disable_dynamic_ps = true;
871 conf->dynamic_ps_timeout = 0;
872 del_timer_sync(&local->dynamic_ps_timer);
873 ieee80211_queue_work(&local->hw,
874 &local->dynamic_ps_enable_work);
875}
876EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
877
965bedad
JB		 878/* powersave */
879static void ieee80211_enable_ps(struct ieee80211_local *local,
880 struct ieee80211_sub_if_data *sdata)
881{
882 struct ieee80211_conf *conf = &local->hw.conf;
883
d5edaedc
JB		 884 /*
885 * If we are scanning right now then the parameters will
886 * take effect when scan finishes.
887 */
fbe9c429 888 if (local->scanning)
d5edaedc
JB		 889 return;
890
965bedad
JB		 891 if (conf->dynamic_ps_timeout > 0 &&
892 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
893 mod_timer(&local->dynamic_ps_timer, jiffies +
894 msecs_to_jiffies(conf->dynamic_ps_timeout));
895 } else {
896 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
897 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 898
2a13052f
JO		 899 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
900 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
901 return;
902
903 conf->flags |= IEEE80211_CONF_PS;
904 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 905 }
906}
907
908static void ieee80211_change_ps(struct ieee80211_local *local)
909{
910 struct ieee80211_conf *conf = &local->hw.conf;
911
912 if (local->ps_sdata) {
965bedad
JB		 913 ieee80211_enable_ps(local, local->ps_sdata);
914 } else if (conf->flags & IEEE80211_CONF_PS) {
915 conf->flags &= ~IEEE80211_CONF_PS;
916 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
917 del_timer_sync(&local->dynamic_ps_timer);
918 cancel_work_sync(&local->dynamic_ps_enable_work);
919 }
920}
921
808118cb
JY		 922static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
923{
924 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
925 struct sta_info *sta = NULL;
c2c98fde 926 bool authorized = false;
808118cb
JY		 927
928 if (!mgd->powersave)
929 return false;
930
05cb9108
JB		 931 if (mgd->broken_ap)
932 return false;
933
808118cb
JY		 934 if (!mgd->associated)
935 return false;
936
808118cb
JY		 937 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
938 IEEE80211_STA_CONNECTION_POLL))
939 return false;
940
941 rcu_read_lock();
942 sta = sta_info_get(sdata, mgd->bssid);
943 if (sta)
c2c98fde 944 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 945 rcu_read_unlock();
946
c2c98fde 947 return authorized;
808118cb
JY		 948}
949
965bedad 950/* need to hold RTNL or interface lock */
10f644a4 951void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 952{
953 struct ieee80211_sub_if_data *sdata, *found = NULL;
954 int count = 0;
195e294d 955 int timeout;
965bedad
JB		 956
957 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
958 local->ps_sdata = NULL;
959 return;
960 }
961
962 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 963 if (!ieee80211_sdata_running(sdata))
965bedad 964 continue;
8c7914de
RM		 965 if (sdata->vif.type == NL80211_IFTYPE_AP) {
966 /* If an AP vif is found, then disable PS
967 * by setting the count to zero thereby setting
968 * ps_sdata to NULL.
969 */
970 count = 0;
971 break;
972 }
965bedad
JB		 973 if (sdata->vif.type != NL80211_IFTYPE_STATION)
974 continue;
975 found = sdata;
976 count++;
977 }
978
808118cb 979 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 980 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 981 s32 beaconint_us;
982
983 if (latency < 0)
ed77134b 984 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 985
986 beaconint_us = ieee80211_tu_to_usec(
987 found->vif.bss_conf.beacon_int);
988
ff616381 989 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 990 if (timeout < 0) {
991 /*
ff616381
JO		 992 * Go to full PSM if the user configures a very low
993 * latency requirement.
0ab82b04
EP		 994 * The 2000 second value is there for compatibility
995 * until the PM_QOS_NETWORK_LATENCY is configured
996 * with real values.
195e294d 997 */
0ab82b04
EP		 998 if (latency > (1900 * USEC_PER_MSEC) &&
999 latency != (2000 * USEC_PER_SEC))
195e294d 1000 timeout = 0;
ff616381
JO		 1001 else
1002 timeout = 100;
195e294d 1003 }
f90754c1
JO		 1004 local->dynamic_ps_user_timeout = timeout;
1005 if (!local->disable_dynamic_ps)
1006 conf->dynamic_ps_timeout =
1007 local->dynamic_ps_user_timeout;
195e294d 1008
04fe2037 1009 if (beaconint_us > latency) {
10f644a4 1010 local->ps_sdata = NULL;
04fe2037 1011 } else {
56007a02 1012 struct ieee80211_bss *bss;
04fe2037 1013 int maxslp = 1;
56007a02 1014 u8 dtimper;
04fe2037 1015
56007a02
JB		 1016 bss = (void *)found->u.mgd.associated->priv;
1017 dtimper = bss->dtim_period;
1018
1019 /* If the TIM IE is invalid, pretend the value is 1 */
1020 if (!dtimper)
1021 dtimper = 1;
1022 else if (dtimper > 1)
04fe2037
JB		 1023 maxslp = min_t(int, dtimper,
1024 latency / beaconint_us);
1025
9ccebe61 1026 local->hw.conf.max_sleep_period = maxslp;
56007a02 1027 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1028 local->ps_sdata = found;
04fe2037 1029 }
10f644a4 1030 } else {
965bedad 1031 local->ps_sdata = NULL;
10f644a4 1032 }
965bedad
JB		 1033
1034 ieee80211_change_ps(local);
1035}
1036
1037void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1038{
1039 struct ieee80211_local *local =
1040 container_of(work, struct ieee80211_local,
1041 dynamic_ps_disable_work);
1042
1043 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1044 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1045 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1046 }
1047
1048 ieee80211_wake_queues_by_reason(&local->hw,
1049 IEEE80211_QUEUE_STOP_REASON_PS);
1050}
1051
1052void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1053{
1054 struct ieee80211_local *local =
1055 container_of(work, struct ieee80211_local,
1056 dynamic_ps_enable_work);
1057 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1058 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1059 unsigned long flags;
1060 int q;
965bedad
JB		 1061
1062 /* can only happen when PS was just disabled anyway */
1063 if (!sdata)
1064 return;
1065
5e34069c
CL		 1066 ifmgd = &sdata->u.mgd;
1067
965bedad
JB		 1068 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1069 return;
1070
77b7023a
AN		 1071 if (!local->disable_dynamic_ps &&
1072 local->hw.conf.dynamic_ps_timeout > 0) {
1073 /* don't enter PS if TX frames are pending */
1074 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1075 mod_timer(&local->dynamic_ps_timer, jiffies +
1076 msecs_to_jiffies(
1077 local->hw.conf.dynamic_ps_timeout));
1078 return;
1079 }
77b7023a
AN		 1080
1081 /*
1082 * transmission can be stopped by others which leads to
1083 * dynamic_ps_timer expiry. Postpone the ps timer if it
1084 * is not the actual idle state.
1085 */
1086 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1087 for (q = 0; q < local->hw.queues; q++) {
1088 if (local->queue_stop_reasons[q]) {
1089 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1090 flags);
1091 mod_timer(&local->dynamic_ps_timer, jiffies +
1092 msecs_to_jiffies(
1093 local->hw.conf.dynamic_ps_timeout));
1094 return;
1095 }
1096 }
1097 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1098 }
1ddc2867 1099
375177bf 1100 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1101 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1102 netif_tx_stop_all_queues(sdata->dev);
965bedad 1103
e8306f98
VN		 1104 if (drv_tx_frames_pending(local))
1105 mod_timer(&local->dynamic_ps_timer, jiffies +
1106 msecs_to_jiffies(
1107 local->hw.conf.dynamic_ps_timeout));
1108 else {
1109 ieee80211_send_nullfunc(local, sdata, 1);
1110 /* Flush to get the tx status of nullfunc frame */
1111 drv_flush(local, false);
1112 }
f3e85b9e
VN		 1113 }
1114
2a13052f
JO		 1115 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1116 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1117 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1118 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1119 local->hw.conf.flags |= IEEE80211_CONF_PS;
1120 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1121 }
f3e85b9e 1122
77b7023a
AN		 1123 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1124 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1125}
1126
1127void ieee80211_dynamic_ps_timer(unsigned long data)
1128{
1129 struct ieee80211_local *local = (void *) data;
1130
78f1a8b7 1131 if (local->quiescing || local->suspended)
5bb644a0
JB		 1132 return;
1133
42935eca 1134 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1135}
1136
60f8b39c 1137/* MLME */
7d25745d 1138static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1139 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1140 u8 *wmm_param, size_t wmm_param_len)
1141{
f0706e82 1142 struct ieee80211_tx_queue_params params;
4ced3f74 1143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1144 size_t left;
1145 int count;
ab13315a 1146 u8 *pos, uapsd_queues = 0;
f0706e82 1147
e1b3ec1a 1148 if (!local->ops->conf_tx)
7d25745d 1149 return false;
e1b3ec1a 1150
32c5057b 1151 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1152 return false;
3434fbd3
JB		 1153
1154 if (!wmm_param)
7d25745d 1155 return false;
3434fbd3 1156
f0706e82 1157 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1158 return false;
ab13315a
KV		 1159
1160 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1161 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1162
f0706e82 1163 count = wmm_param[6] & 0x0f;
46900298 1164 if (count == ifmgd->wmm_last_param_set)
7d25745d 1165 return false;
46900298 1166 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1167
1168 pos = wmm_param + 8;
1169 left = wmm_param_len - 8;
1170
1171 memset(&params, 0, sizeof(params));
1172
00e96dec 1173 sdata->wmm_acm = 0;
f0706e82
JB		 1174 for (; left >= 4; left -= 4, pos += 4) {
1175 int aci = (pos[0] >> 5) & 0x03;
1176 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1177 bool uapsd = false;
f0706e82
JB		 1178 int queue;
1179
1180 switch (aci) {
0eeb59fe 1181 case 1: /* AC_BK */
e100bb64 1182 queue = 3;
988c0f72 1183 if (acm)
00e96dec 1184 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1185 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1186 uapsd = true;
f0706e82 1187 break;
0eeb59fe 1188 case 2: /* AC_VI */
e100bb64 1189 queue = 1;
988c0f72 1190 if (acm)
00e96dec 1191 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1192 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1193 uapsd = true;
f0706e82 1194 break;
0eeb59fe 1195 case 3: /* AC_VO */
e100bb64 1196 queue = 0;
988c0f72 1197 if (acm)
00e96dec 1198 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1199 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1200 uapsd = true;
f0706e82 1201 break;
0eeb59fe 1202 case 0: /* AC_BE */
f0706e82 1203 default:
e100bb64 1204 queue = 2;
988c0f72 1205 if (acm)
00e96dec 1206 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1207 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1208 uapsd = true;
f0706e82
JB		 1209 break;
1210 }
1211
1212 params.aifs = pos[0] & 0x0f;
1213 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1214 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1215 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1216 params.uapsd = uapsd;
1217
bdcbd8e0
JB		 1218 mlme_dbg(sdata,
1219 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1220 queue, aci, acm,
1221 params.aifs, params.cw_min, params.cw_max,
1222 params.txop, params.uapsd);
f6f3def3
EP		 1223 sdata->tx_conf[queue] = params;
1224 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1225 sdata_err(sdata,
1226 "failed to set TX queue parameters for queue %d\n",
1227 queue);
f0706e82 1228 }
e1b3ec1a
SG		 1229
1230 /* enable WMM or activate new settings */
4ced3f74 1231 sdata->vif.bss_conf.qos = true;
7d25745d 1232 return true;
f0706e82
JB		 1233}
1234
925e64c3
SG		 1235static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1236{
1237 lockdep_assert_held(&sdata->local->mtx);
1238
1239 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1240 IEEE80211_STA_BEACON_POLL);
1241 ieee80211_run_deferred_scan(sdata->local);
1242}
1243
1244static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1245{
1246 mutex_lock(&sdata->local->mtx);
1247 __ieee80211_stop_poll(sdata);
1248 mutex_unlock(&sdata->local->mtx);
1249}
1250
7a5158ef
JB		 1251static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1252 u16 capab, bool erp_valid, u8 erp)
5628221c 1253{
bda3933a 1254 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1255 u32 changed = 0;
7a5158ef
JB		 1256 bool use_protection;
1257 bool use_short_preamble;
1258 bool use_short_slot;
1259
1260 if (erp_valid) {
1261 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1262 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1263 } else {
1264 use_protection = false;
1265 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1266 }
1267
1268 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1269 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1270 use_short_slot = true;
5628221c 1271
471b3efd 1272 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1273 bss_conf->use_cts_prot = use_protection;
1274 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1275 }
7e9ed188 1276
d43c7b37 1277 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1278 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1279 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1280 }
d9430a32 1281
7a5158ef 1282 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1283 bss_conf->use_short_slot = use_short_slot;
1284 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1285 }
1286
1287 return changed;
1288}
1289
f698d856 1290static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1291 struct cfg80211_bss *cbss,
ae5eb026 1292 u32 bss_info_changed)
f0706e82 1293{
0c1ad2ca 1294 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1295 struct ieee80211_local *local = sdata->local;
68542962 1296 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1297
ae5eb026 1298 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1299 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1300 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1301
7ccc8bd7
FF		 1302 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1303 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1304
0c1ad2ca
JB		 1305 sdata->u.mgd.associated = cbss;
1306 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1307
17e4ec14
JM		 1308 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1309
b291ba11 1310 /* just to be sure */
925e64c3 1311 ieee80211_stop_poll(sdata);
b291ba11 1312
9ac19a90 1313 ieee80211_led_assoc(local, 1);
9306102e 1314
e5b900d2
JB		 1315 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1316 bss_conf->dtim_period = bss->dtim_period;
1317 else
1318 bss_conf->dtim_period = 0;
1319
68542962 1320 bss_conf->assoc = 1;
9cef8737 1321
a97c13c3 1322 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1323 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1324 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1325 bss_info_changed |= BSS_CHANGED_CQM;
1326
68542962
JO		 1327 /* Enable ARP filtering */
1328 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1329 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1330 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1331 }
1332
ae5eb026 1333 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1334
056508dc
JB		 1335 mutex_lock(&local->iflist_mtx);
1336 ieee80211_recalc_ps(local, -1);
025e6be2 1337 ieee80211_recalc_smps(local);
056508dc 1338 mutex_unlock(&local->iflist_mtx);
e0cb686f 1339
8a5b33f5 1340 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1341 netif_carrier_on(sdata->dev);
f0706e82
JB		 1342}
1343
e69e95db 1344static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1345 u16 stype, u16 reason, bool tx,
1346 u8 *frame_buf)
aa458d17 1347{
46900298 1348 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1349 struct ieee80211_local *local = sdata->local;
1350 struct sta_info *sta;
3cc5240b 1351 u32 changed = 0;
aa458d17 1352
77fdaa12
JB		 1353 ASSERT_MGD_MTX(ifmgd);
1354
37ad3888
JB		 1355 if (WARN_ON_ONCE(tx && !frame_buf))
1356 return;
1357
b291ba11
JB		 1358 if (WARN_ON(!ifmgd->associated))
1359 return;
1360
79543d8e
DS		 1361 ieee80211_stop_poll(sdata);
1362
77fdaa12 1363 ifmgd->associated = NULL;
77fdaa12
JB		 1364
1365 /*
1366 * we need to commit the associated = NULL change because the
1367 * scan code uses that to determine whether this iface should
1368 * go to/wake up from powersave or not -- and could otherwise
1369 * wake the queues erroneously.
1370 */
1371 smp_mb();
1372
1373 /*
1374 * Thus, we can only afterwards stop the queues -- to account
1375 * for the case where another CPU is finishing a scan at this
1376 * time -- we don't want the scan code to enable queues.
1377 */
aa458d17 1378
8a5b33f5 1379 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1380 netif_carrier_off(sdata->dev);
1381
2a419056 1382 mutex_lock(&local->sta_mtx);
88a9e31c 1383 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1384 if (sta) {
c2c98fde 1385 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1386 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1387 }
2a419056 1388 mutex_unlock(&local->sta_mtx);
aa458d17 1389
88bc40e8
EP		 1390 /*
1391 * if we want to get out of ps before disassoc (why?) we have
1392 * to do it before sending disassoc, as otherwise the null-packet
1393 * won't be valid.
1394 */
1395 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1396 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1397 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1398 }
1399 local->ps_sdata = NULL;
1400
f823981e
EP		 1401 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1402 if (tx)
1403 drv_flush(local, false);
1404
37ad3888
JB		 1405 /* deauthenticate/disassociate now */
1406 if (tx || frame_buf)
88a9e31c
EP		 1407 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1408 reason, tx, frame_buf);
37ad3888
JB		 1409
1410 /* flush out frame */
1411 if (tx)
1412 drv_flush(local, false);
1413
88a9e31c
EP		 1414 /* clear bssid only after building the needed mgmt frames */
1415 memset(ifmgd->bssid, 0, ETH_ALEN);
1416
37ad3888
JB		 1417 /* remove AP and TDLS peers */
1418 sta_info_flush(local, sdata);
1419
1420 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1421 changed |= ieee80211_reset_erp_info(sdata);
1422
f5e5bf25 1423 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1424 changed |= BSS_CHANGED_ASSOC;
1425 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1426
413ad50a 1427 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1428 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1429 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1430
a8302de9
VT		 1431 local->power_constr_level = 0;
1432
520eb820
KV		 1433 del_timer_sync(&local->dynamic_ps_timer);
1434 cancel_work_sync(&local->dynamic_ps_enable_work);
1435
68542962
JO		 1436 /* Disable ARP filtering */
1437 if (sdata->vif.bss_conf.arp_filter_enabled) {
1438 sdata->vif.bss_conf.arp_filter_enabled = false;
1439 changed |= BSS_CHANGED_ARP_FILTER;
1440 }
1441
3abead59
JB		 1442 sdata->vif.bss_conf.qos = false;
1443 changed |= BSS_CHANGED_QOS;
1444
0aaffa9b
JB		 1445 /* The BSSID (not really interesting) and HT changed */
1446 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1447 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1448
3cc5240b
JB		 1449 /* channel(_type) changes are handled by ieee80211_hw_config */
1450 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1451 ieee80211_hw_config(local, 0);
1452
3abead59
JB		 1453 /* disassociated - set to defaults now */
1454 ieee80211_set_wmm_default(sdata, false);
1455
b9dcf712
JB		 1456 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1457 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1458 del_timer_sync(&sdata->u.mgd.timer);
1459 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1460}
f0706e82 1461
3cf335d5
KV		 1462void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1463 struct ieee80211_hdr *hdr)
1464{
1465 /*
1466 * We can postpone the mgd.timer whenever receiving unicast frames
1467 * from AP because we know that the connection is working both ways
1468 * at that time. But multicast frames (and hence also beacons) must
1469 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1470 * data idle periods for sending the periodic probe request to the
1471 * AP we're connected to.
3cf335d5 1472 */
b291ba11
JB		 1473 if (is_multicast_ether_addr(hdr->addr1))
1474 return;
1475
be099e82 1476 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1477}
f0706e82 1478
4e5ff376
FF		 1479static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1480{
1481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1482 struct ieee80211_local *local = sdata->local;
4e5ff376 1483
133d40f9 1484 mutex_lock(&local->mtx);
4e5ff376 1485 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1486 IEEE80211_STA_CONNECTION_POLL))) {
1487 mutex_unlock(&local->mtx);
1488 return;
1489 }
4e5ff376 1490
925e64c3 1491 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1492
1493 mutex_lock(&local->iflist_mtx);
1494 ieee80211_recalc_ps(local, -1);
1495 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1496
1497 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1498 goto out;
4e5ff376
FF		 1499
1500 /*
1501 * We've received a probe response, but are not sure whether
1502 * we have or will be receiving any beacons or data, so let's
1503 * schedule the timers again, just in case.
1504 */
1505 ieee80211_sta_reset_beacon_monitor(sdata);
1506
1507 mod_timer(&ifmgd->conn_mon_timer,
1508 round_jiffies_up(jiffies +
1509 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1510out:
133d40f9 1511 mutex_unlock(&local->mtx);
4e5ff376
FF		 1512}
1513
1514void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1515 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1516{
75706d0e 1517 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1518 return;
1519
04ac3c0e
FF		 1520 if (ack)
1521 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1522
1523 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1524 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1525 if (ack)
1526 sdata->u.mgd.probe_send_count = 0;
1527 else
1528 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1529 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1530 }
1531}
1532
a43abf29
ML		 1533static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1534{
1535 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1536 const u8 *ssid;
f01a067d 1537 u8 *dst = ifmgd->associated->bssid;
180205bd 1538 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1539
1540 /*
1541 * Try sending broadcast probe requests for the last three
1542 * probe requests after the first ones failed since some
1543 * buggy APs only support broadcast probe requests.
1544 */
1545 if (ifmgd->probe_send_count >= unicast_limit)
1546 dst = NULL;
a43abf29 1547
4e5ff376
FF		 1548 /*
1549 * When the hardware reports an accurate Tx ACK status, it's
1550 * better to send a nullfunc frame instead of a probe request,
1551 * as it will kick us off the AP quickly if we aren't associated
1552 * anymore. The timeout will be reset if the frame is ACKed by
1553 * the AP.
1554 */
992e68bf
SD		 1555 ifmgd->probe_send_count++;
1556
04ac3c0e
FF		 1557 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1558 ifmgd->nullfunc_failed = false;
4e5ff376 1559 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1560 } else {
88c868c4
SG		 1561 int ssid_len;
1562
4e5ff376 1563 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1564 if (WARN_ON_ONCE(ssid == NULL))
1565 ssid_len = 0;
1566 else
1567 ssid_len = ssid[1];
1568
1569 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1570 0, (u32) -1, true, false);
4e5ff376 1571 }
a43abf29 1572
180205bd 1573 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1574 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1575 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1576 drv_flush(sdata->local, false);
a43abf29
ML		 1577}
1578
b291ba11
JB		 1579static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1580 bool beacon)
04de8381 1581{
04de8381 1582 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1583 bool already = false;
34bfc411 1584
9607e6b6 1585 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1586 return;
1587
77fdaa12
JB		 1588 mutex_lock(&ifmgd->mtx);
1589
1590 if (!ifmgd->associated)
1591 goto out;
1592
133d40f9
SG		 1593 mutex_lock(&sdata->local->mtx);
1594
1595 if (sdata->local->tmp_channel || sdata->local->scanning) {
1596 mutex_unlock(&sdata->local->mtx);
1597 goto out;
1598 }
1599
e87cc472 1600 if (beacon)
bdcbd8e0
JB		 1601 mlme_dbg_ratelimited(sdata,
1602 "detected beacon loss from AP - sending probe request\n");
1603
6efb71b0
HS		 1604 ieee80211_cqm_rssi_notify(&sdata->vif,
1605 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1606
b291ba11
JB		 1607 /*
1608 * The driver/our work has already reported this event or the
1609 * connection monitoring has kicked in and we have already sent
1610 * a probe request. Or maybe the AP died and the driver keeps
1611 * reporting until we disassociate...
1612 *
1613 * In either case we have to ignore the current call to this
1614 * function (except for setting the correct probe reason bit)
1615 * because otherwise we would reset the timer every time and
1616 * never check whether we received a probe response!
1617 */
1618 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1619 IEEE80211_STA_CONNECTION_POLL))
1620 already = true;
1621
1622 if (beacon)
1623 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1624 else
1625 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1626
133d40f9
SG		 1627 mutex_unlock(&sdata->local->mtx);
1628
b291ba11
JB		 1629 if (already)
1630 goto out;
1631
4e751843
JB		 1632 mutex_lock(&sdata->local->iflist_mtx);
1633 ieee80211_recalc_ps(sdata->local, -1);
1634 mutex_unlock(&sdata->local->iflist_mtx);
1635
a43abf29
ML		 1636 ifmgd->probe_send_count = 0;
1637 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1638 out:
1639 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1640}
1641
a619a4c0
JO		 1642struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1643 struct ieee80211_vif *vif)
1644{
1645 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1646 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1647 struct cfg80211_bss *cbss;
a619a4c0
JO		 1648 struct sk_buff *skb;
1649 const u8 *ssid;
88c868c4 1650 int ssid_len;
a619a4c0
JO		 1651
1652 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1653 return NULL;
1654
1655 ASSERT_MGD_MTX(ifmgd);
1656
d9b3b28b
EP		 1657 if (ifmgd->associated)
1658 cbss = ifmgd->associated;
1659 else if (ifmgd->auth_data)
1660 cbss = ifmgd->auth_data->bss;
1661 else if (ifmgd->assoc_data)
1662 cbss = ifmgd->assoc_data->bss;
1663 else
a619a4c0
JO		 1664 return NULL;
1665
d9b3b28b 1666 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1667 if (WARN_ON_ONCE(ssid == NULL))
1668 ssid_len = 0;
1669 else
1670 ssid_len = ssid[1];
1671
d9b3b28b 1672 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
88c868c4 1673 (u32) -1, ssid + 2, ssid_len,
85a237fe 1674 NULL, 0, true);
a619a4c0
JO		 1675
1676 return skb;
1677}
1678EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1679
1e4dcd01
JO		 1680static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1681{
1682 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1683 struct ieee80211_local *local = sdata->local;
1684 u8 bssid[ETH_ALEN];
5fef7dbc 1685 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1686
1687 mutex_lock(&ifmgd->mtx);
1688 if (!ifmgd->associated) {
1689 mutex_unlock(&ifmgd->mtx);
1690 return;
1691 }
1692
1693 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1694
bdcbd8e0 1695 sdata_info(sdata, "Connection to AP %pM lost\n", bssid);
1e4dcd01 1696
37ad3888
JB		 1697 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1698 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1699 false, frame_buf);
1e4dcd01 1700 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1701
1e4dcd01
JO		 1702 /*
1703 * must be outside lock due to cfg80211,
1704 * but that's not a problem.
1705 */
5fef7dbc 1706 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1707
1708 mutex_lock(&local->mtx);
1709 ieee80211_recalc_idle(local);
1710 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1711}
1712
1713void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1714{
1715 struct ieee80211_sub_if_data *sdata =
1716 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1717 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1718 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1719 struct sta_info *sta;
1720
1721 if (ifmgd->associated) {
30fa9047 1722 rcu_read_lock();
a85e1d55
PS		 1723 sta = sta_info_get(sdata, ifmgd->bssid);
1724 if (sta)
1725 sta->beacon_loss_count++;
30fa9047 1726 rcu_read_unlock();
a85e1d55 1727 }
b291ba11 1728
1e4dcd01
JO		 1729 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1730 __ieee80211_connection_loss(sdata);
1731 else
1732 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1733}
1734
04de8381
KV		 1735void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1736{
1737 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1738 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1739
b5878a2d
JB		 1740 trace_api_beacon_loss(sdata);
1741
1e4dcd01
JO		 1742 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1743 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1744}
1745EXPORT_SYMBOL(ieee80211_beacon_loss);
1746
1e4dcd01
JO		 1747void ieee80211_connection_loss(struct ieee80211_vif *vif)
1748{
1749 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1750 struct ieee80211_hw *hw = &sdata->local->hw;
1751
b5878a2d
JB		 1752 trace_api_connection_loss(sdata);
1753
1e4dcd01
JO		 1754 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1755 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1756}
1757EXPORT_SYMBOL(ieee80211_connection_loss);
1758
1759
66e67e41
JB		 1760static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1761 bool assoc)
1762{
1763 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1764
1765 lockdep_assert_held(&sdata->u.mgd.mtx);
1766
66e67e41
JB		 1767 if (!assoc) {
1768 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1769
1770 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1771 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1772 }
1773
1774 cfg80211_put_bss(auth_data->bss);
1775 kfree(auth_data);
1776 sdata->u.mgd.auth_data = NULL;
1777}
1778
1779static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1780 struct ieee80211_mgmt *mgmt, size_t len)
1781{
1782 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1783 u8 *pos;
1784 struct ieee802_11_elems elems;
1785
1786 pos = mgmt->u.auth.variable;
1787 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1788 if (!elems.challenge)
1789 return;
1790 auth_data->expected_transaction = 4;
a1845fc7 1791 drv_mgd_prepare_tx(sdata->local, sdata);
66e67e41
JB		 1792 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1793 elems.challenge - 2, elems.challenge_len + 2,
1794 auth_data->bss->bssid, auth_data->bss->bssid,
1795 auth_data->key, auth_data->key_len,
1796 auth_data->key_idx);
1797}
1798
1799static enum rx_mgmt_action __must_check
1800ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1801 struct ieee80211_mgmt *mgmt, size_t len)
1802{
1803 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1804 u8 bssid[ETH_ALEN];
1805 u16 auth_alg, auth_transaction, status_code;
1806 struct sta_info *sta;
1807
1808 lockdep_assert_held(&ifmgd->mtx);
1809
1810 if (len < 24 + 6)
1811 return RX_MGMT_NONE;
1812
1813 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1814 return RX_MGMT_NONE;
1815
1816 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1817
b203ca39 1818 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1819 return RX_MGMT_NONE;
1820
1821 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1822 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1823 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1824
1825 if (auth_alg != ifmgd->auth_data->algorithm ||
1826 auth_transaction != ifmgd->auth_data->expected_transaction)
1827 return RX_MGMT_NONE;
1828
1829 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1830 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1831 mgmt->sa, status_code);
dac211ec
EP		 1832 ieee80211_destroy_auth_data(sdata, false);
1833 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1834 }
1835
1836 switch (ifmgd->auth_data->algorithm) {
1837 case WLAN_AUTH_OPEN:
1838 case WLAN_AUTH_LEAP:
1839 case WLAN_AUTH_FT:
1840 break;
1841 case WLAN_AUTH_SHARED_KEY:
1842 if (ifmgd->auth_data->expected_transaction != 4) {
1843 ieee80211_auth_challenge(sdata, mgmt, len);
1844 /* need another frame */
1845 return RX_MGMT_NONE;
1846 }
1847 break;
1848 default:
1849 WARN_ONCE(1, "invalid auth alg %d",
1850 ifmgd->auth_data->algorithm);
1851 return RX_MGMT_NONE;
1852 }
1853
bdcbd8e0 1854 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1855 ifmgd->auth_data->done = true;
1856 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1857 run_again(ifmgd, ifmgd->auth_data->timeout);
1858
1859 /* move station state to auth */
1860 mutex_lock(&sdata->local->sta_mtx);
1861 sta = sta_info_get(sdata, bssid);
1862 if (!sta) {
1863 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1864 goto out_err;
1865 }
1866 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1867 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1868 goto out_err;
1869 }
1870 mutex_unlock(&sdata->local->sta_mtx);
1871
1872 return RX_MGMT_CFG80211_RX_AUTH;
1873 out_err:
1874 mutex_unlock(&sdata->local->sta_mtx);
1875 /* ignore frame -- wait for timeout */
1876 return RX_MGMT_NONE;
1877}
1878
1879
77fdaa12
JB		 1880static enum rx_mgmt_action __must_check
1881ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1882 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1883{
46900298 1884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1885 const u8 *bssid = NULL;
f0706e82
JB		 1886 u16 reason_code;
1887
66e67e41
JB		 1888 lockdep_assert_held(&ifmgd->mtx);
1889
f4ea83dd 1890 if (len < 24 + 2)
77fdaa12 1891 return RX_MGMT_NONE;
f0706e82 1892
66e67e41 1893 if (!ifmgd->associated ||
b203ca39 1894 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1895 return RX_MGMT_NONE;
77fdaa12 1896
0c1ad2ca 1897 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1898
1899 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1900
bdcbd8e0
JB		 1901 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1902 bssid, reason_code);
77fdaa12 1903
37ad3888
JB		 1904 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1905
7da7cc1d 1906 mutex_lock(&sdata->local->mtx);
63f170e0 1907 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1908 mutex_unlock(&sdata->local->mtx);
f0706e82 1909
77fdaa12 1910 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1911}
1912
1913
77fdaa12
JB		 1914static enum rx_mgmt_action __must_check
1915ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1916 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1917{
46900298 1918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1919 u16 reason_code;
1920
66e67e41 1921 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1922
66e67e41 1923 if (len < 24 + 2)
77fdaa12
JB		 1924 return RX_MGMT_NONE;
1925
66e67e41 1926 if (!ifmgd->associated ||
b203ca39 1927 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1928 return RX_MGMT_NONE;
f0706e82
JB		 1929
1930 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1931
bdcbd8e0
JB		 1932 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1933 mgmt->sa, reason_code);
f0706e82 1934
37ad3888
JB		 1935 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1936
7da7cc1d 1937 mutex_lock(&sdata->local->mtx);
bc83b681 1938 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1939 mutex_unlock(&sdata->local->mtx);
37ad3888 1940
77fdaa12 1941 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1942}
1943
c74d084f
CL		 1944static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1945 u8 *supp_rates, unsigned int supp_rates_len,
1946 u32 *rates, u32 *basic_rates,
1947 bool *have_higher_than_11mbit,
1948 int *min_rate, int *min_rate_index)
1949{
1950 int i, j;
1951
1952 for (i = 0; i < supp_rates_len; i++) {
1953 int rate = (supp_rates[i] & 0x7f) * 5;
1954 bool is_basic = !!(supp_rates[i] & 0x80);
1955
1956 if (rate > 110)
1957 *have_higher_than_11mbit = true;
1958
1959 /*
1960 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1961 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1962 *
1963 * Note: Even through the membership selector and the basic
1964 * rate flag share the same bit, they are not exactly
1965 * the same.
1966 */
1967 if (!!(supp_rates[i] & 0x80) &&
1968 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1969 continue;
1970
1971 for (j = 0; j < sband->n_bitrates; j++) {
1972 if (sband->bitrates[j].bitrate == rate) {
1973 *rates |= BIT(j);
1974 if (is_basic)
1975 *basic_rates |= BIT(j);
1976 if (rate < *min_rate) {
1977 *min_rate = rate;
1978 *min_rate_index = j;
1979 }
1980 break;
1981 }
1982 }
1983 }
1984}
f0706e82 1985
66e67e41
JB		 1986static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1987 bool assoc)
1988{
1989 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1990
1991 lockdep_assert_held(&sdata->u.mgd.mtx);
1992
66e67e41
JB		 1993 if (!assoc) {
1994 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1995
1996 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1997 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1998 }
1999
2000 kfree(assoc_data);
2001 sdata->u.mgd.assoc_data = NULL;
2002}
2003
2004static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2005 struct cfg80211_bss *cbss,
af6b6374 2006 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2007{
46900298 2008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2009 struct ieee80211_local *local = sdata->local;
8318d78a 2010 struct ieee80211_supported_band *sband;
f0706e82 2011 struct sta_info *sta;
af6b6374 2012 u8 *pos;
af6b6374 2013 u16 capab_info, aid;
f0706e82 2014 struct ieee802_11_elems elems;
bda3933a 2015 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2016 u32 changed = 0;
c74d084f 2017 int err;
f0706e82 2018
af6b6374 2019 /* AssocResp and ReassocResp have identical structure */
f0706e82 2020
f0706e82 2021 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2022 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2023
1dd84aa2 2024 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2025 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2026 aid);
1dd84aa2
JB		 2027 aid &= ~(BIT(15) | BIT(14));
2028
05cb9108
JB		 2029 ifmgd->broken_ap = false;
2030
2031 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2032 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2033 aid);
05cb9108
JB		 2034 aid = 0;
2035 ifmgd->broken_ap = true;
2036 }
2037
af6b6374
JB		 2038 pos = mgmt->u.assoc_resp.variable;
2039 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2040
f0706e82 2041 if (!elems.supp_rates) {
bdcbd8e0 2042 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2043 return false;
f0706e82
JB		 2044 }
2045
46900298 2046 ifmgd->aid = aid;
f0706e82 2047
2a33bee2
GE		 2048 mutex_lock(&sdata->local->sta_mtx);
2049 /*
2050 * station info was already allocated and inserted before
2051 * the association and should be available to us
2052 */
7852e361 2053 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2054 if (WARN_ON(!sta)) {
2055 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2056 return false;
77fdaa12 2057 }
05e5e883 2058
66e67e41 2059 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2060
ab1faead 2061 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2062 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2063 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2064
64f68e5d
JB		 2065 sta->supports_40mhz =
2066 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2067
4b7679a5 2068 rate_control_rate_init(sta);
f0706e82 2069
46900298 2070 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2071 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2072
ddf4ac53 2073 if (elems.wmm_param)
c2c98fde 2074 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2075
c8987876
JB		 2076 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2077 if (!err)
2078 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2079 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2080 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2081 if (err) {
bdcbd8e0
JB		 2082 sdata_info(sdata,
2083 "failed to move station %pM to desired state\n",
2084 sta->sta.addr);
c8987876
JB		 2085 WARN_ON(__sta_info_destroy(sta));
2086 mutex_unlock(&sdata->local->sta_mtx);
2087 return false;
2088 }
2089
7852e361 2090 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2091
f2176d72
JO		 2092 /*
2093 * Always handle WMM once after association regardless
2094 * of the first value the AP uses. Setting -1 here has
2095 * that effect because the AP values is an unsigned
2096 * 4-bit value.
2097 */
2098 ifmgd->wmm_last_param_set = -1;
2099
ddf4ac53 2100 if (elems.wmm_param)
4ced3f74 2101 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2102 elems.wmm_param_len);
aa837e1d 2103 else
3abead59
JB		 2104 ieee80211_set_wmm_default(sdata, false);
2105 changed |= BSS_CHANGED_QOS;
f0706e82 2106
074d46d1 2107 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2108 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2109 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2110 cbss->bssid, false);
ae5eb026 2111
60f8b39c
JB		 2112 /* set AID and assoc capability,
2113 * ieee80211_set_associated() will tell the driver */
2114 bss_conf->aid = aid;
2115 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2116 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2117
d524215f
FF		 2118 /*
2119 * If we're using 4-addr mode, let the AP know that we're
2120 * doing so, so that it can create the STA VLAN on its side
2121 */
2122 if (ifmgd->use_4addr)
2123 ieee80211_send_4addr_nullfunc(local, sdata);
2124
15b7b062 2125 /*
b291ba11
JB		 2126 * Start timer to probe the connection to the AP now.
2127 * Also start the timer that will detect beacon loss.
15b7b062 2128 */
b291ba11 2129 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2130 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2131
af6b6374 2132 return true;
f0706e82
JB		 2133}
2134
66e67e41
JB		 2135static enum rx_mgmt_action __must_check
2136ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2137 struct ieee80211_mgmt *mgmt, size_t len,
2138 struct cfg80211_bss **bss)
2139{
2140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2141 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2142 u16 capab_info, status_code, aid;
2143 struct ieee802_11_elems elems;
2144 u8 *pos;
2145 bool reassoc;
2146
2147 lockdep_assert_held(&ifmgd->mtx);
2148
2149 if (!assoc_data)
2150 return RX_MGMT_NONE;
b203ca39 2151 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2152 return RX_MGMT_NONE;
2153
2154 /*
2155 * AssocResp and ReassocResp have identical structure, so process both
2156 * of them in this function.
2157 */
2158
2159 if (len < 24 + 6)
2160 return RX_MGMT_NONE;
2161
2162 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2163 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2164 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2165 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2166
bdcbd8e0
JB		 2167 sdata_info(sdata,
2168 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2169 reassoc ? "Rea" : "A", mgmt->sa,
2170 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2171
2172 pos = mgmt->u.assoc_resp.variable;
2173 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2174
2175 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2176 elems.timeout_int && elems.timeout_int_len == 5 &&
2177 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2178 u32 tu, ms;
2179 tu = get_unaligned_le32(elems.timeout_int + 1);
2180 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2181 sdata_info(sdata,
2182 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2183 mgmt->sa, tu, ms);
66e67e41
JB		 2184 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2185 if (ms > IEEE80211_ASSOC_TIMEOUT)
2186 run_again(ifmgd, assoc_data->timeout);
2187 return RX_MGMT_NONE;
2188 }
2189
2190 *bss = assoc_data->bss;
2191
2192 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2193 sdata_info(sdata, "%pM denied association (code=%d)\n",
2194 mgmt->sa, status_code);
66e67e41
JB		 2195 ieee80211_destroy_assoc_data(sdata, false);
2196 } else {
66e67e41
JB		 2197 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2198 /* oops -- internal error -- send timeout for now */
10a9109f 2199 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2200 cfg80211_put_bss(*bss);
2201 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2202 }
635d999f 2203 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2204
2205 /*
2206 * destroy assoc_data afterwards, as otherwise an idle
2207 * recalc after assoc_data is NULL but before associated
2208 * is set can cause the interface to go idle
2209 */
2210 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2211 }
2212
2213 return RX_MGMT_CFG80211_RX_ASSOC;
2214}
98c8fccf
JB		 2215static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2216 struct ieee80211_mgmt *mgmt,
2217 size_t len,
2218 struct ieee80211_rx_status *rx_status,
2219 struct ieee802_11_elems *elems,
2220 bool beacon)
2221{
2222 struct ieee80211_local *local = sdata->local;
2223 int freq;
c2b13452 2224 struct ieee80211_bss *bss;
98c8fccf 2225 struct ieee80211_channel *channel;
56007a02
JB		 2226 bool need_ps = false;
2227
66e67e41 2228 if (sdata->u.mgd.associated &&
b203ca39 2229 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2230 bss = (void *)sdata->u.mgd.associated->priv;
2231 /* not previously set so we may need to recalc */
2232 need_ps = !bss->dtim_period;
2233 }
98c8fccf
JB		 2234
2235 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2236 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2237 rx_status->band);
98c8fccf
JB		 2238 else
2239 freq = rx_status->freq;
2240
2241 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2242
2243 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2244 return;
2245
98c8fccf 2246 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2247 channel, beacon);
77fdaa12
JB		 2248 if (bss)
2249 ieee80211_rx_bss_put(local, bss);
2250
2251 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2252 return;
2253
56007a02
JB		 2254 if (need_ps) {
2255 mutex_lock(&local->iflist_mtx);
2256 ieee80211_recalc_ps(local, -1);
2257 mutex_unlock(&local->iflist_mtx);
2258 }
2259
c481ec97 2260 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2261 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2262 ETH_ALEN) == 0)) {
c481ec97
S		 2263 struct ieee80211_channel_sw_ie *sw_elem =
2264 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2265 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2266 bss, rx_status->mactime);
c481ec97 2267 }
f0706e82
JB		 2268}
2269
2270
f698d856 2271static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2272 struct sk_buff *skb)
f0706e82 2273{
af6b6374 2274 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2275 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2276 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2277 size_t baselen, len = skb->len;
ae6a44e3
EK		 2278 struct ieee802_11_elems elems;
2279
15b7b062
KV		 2280 ifmgd = &sdata->u.mgd;
2281
77fdaa12
JB		 2282 ASSERT_MGD_MTX(ifmgd);
2283
b203ca39 2284 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2285 return; /* ignore ProbeResp to foreign address */
2286
ae6a44e3
EK		 2287 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2288 if (baselen > len)
2289 return;
2290
2291 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2292 &elems);
2293
98c8fccf 2294 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2295
77fdaa12 2296 if (ifmgd->associated &&
b203ca39 2297 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2298 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2299
2300 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2301 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2302 /* got probe response, continue with auth */
bdcbd8e0 2303 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2304 ifmgd->auth_data->tries = 0;
2305 ifmgd->auth_data->timeout = jiffies;
2306 run_again(ifmgd, ifmgd->auth_data->timeout);
2307 }
f0706e82
JB		 2308}
2309
d91f36db
JB		 2310/*
2311 * This is the canonical list of information elements we care about,
2312 * the filter code also gives us all changes to the Microsoft OUI
2313 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2314 *
2315 * We implement beacon filtering in software since that means we can
2316 * avoid processing the frame here and in cfg80211, and userspace
2317 * will not be able to tell whether the hardware supports it or not.
2318 *
2319 * XXX: This list needs to be dynamic -- userspace needs to be able to
2320 * add items it requires. It also needs to be able to tell us to
2321 * look out for other vendor IEs.
2322 */
2323static const u64 care_about_ies =
1d4df3a5
JB		 2324 (1ULL << WLAN_EID_COUNTRY) |
2325 (1ULL << WLAN_EID_ERP_INFO) |
2326 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2327 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2328 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2329 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2330
f698d856 2331static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2332 struct ieee80211_mgmt *mgmt,
2333 size_t len,
2334 struct ieee80211_rx_status *rx_status)
2335{
d91f36db 2336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2337 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2338 size_t baselen;
2339 struct ieee802_11_elems elems;
f698d856 2340 struct ieee80211_local *local = sdata->local;
471b3efd 2341 u32 changed = 0;
d91f36db 2342 bool erp_valid, directed_tim = false;
7a5158ef 2343 u8 erp_value = 0;
d91f36db 2344 u32 ncrc;
77fdaa12
JB		 2345 u8 *bssid;
2346
66e67e41 2347 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2348
ae6a44e3
EK		 2349 /* Process beacon from the current BSS */
2350 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2351 if (baselen > len)
2352 return;
2353
d91f36db 2354 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2355 return;
f0706e82 2356
66e67e41 2357 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2358 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2359 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2360 len - baselen, &elems);
77fdaa12 2361
66e67e41
JB		 2362 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2363 false);
2364 ifmgd->assoc_data->have_beacon = true;
2365 ifmgd->assoc_data->sent_assoc = false;
2366 /* continue assoc process */
2367 ifmgd->assoc_data->timeout = jiffies;
2368 run_again(ifmgd, ifmgd->assoc_data->timeout);
2369 return;
2370 }
77fdaa12 2371
66e67e41 2372 if (!ifmgd->associated ||
b203ca39 2373 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2374 return;
66e67e41 2375 bssid = ifmgd->associated->bssid;
f0706e82 2376
17e4ec14
JM		 2377 /* Track average RSSI from the Beacon frames of the current AP */
2378 ifmgd->last_beacon_signal = rx_status->signal;
2379 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2380 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2381 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2382 ifmgd->last_cqm_event_signal = 0;
391a200a 2383 ifmgd->count_beacon_signal = 1;
615f7b9b 2384 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2385 } else {
2386 ifmgd->ave_beacon_signal =
2387 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2388 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2389 ifmgd->ave_beacon_signal) / 16;
391a200a 2390 ifmgd->count_beacon_signal++;
17e4ec14 2391 }
615f7b9b
MV		 2392
2393 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2394 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2395 int sig = ifmgd->ave_beacon_signal;
2396 int last_sig = ifmgd->last_ave_beacon_signal;
2397
2398 /*
2399 * if signal crosses either of the boundaries, invoke callback
2400 * with appropriate parameters
2401 */
2402 if (sig > ifmgd->rssi_max_thold &&
2403 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2404 ifmgd->last_ave_beacon_signal = sig;
2405 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2406 } else if (sig < ifmgd->rssi_min_thold &&
2407 (last_sig >= ifmgd->rssi_max_thold ||
2408 last_sig == 0)) {
2409 ifmgd->last_ave_beacon_signal = sig;
2410 drv_rssi_callback(local, RSSI_EVENT_LOW);
2411 }
2412 }
2413
17e4ec14 2414 if (bss_conf->cqm_rssi_thold &&
391a200a 2415 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2416 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2417 int sig = ifmgd->ave_beacon_signal / 16;
2418 int last_event = ifmgd->last_cqm_event_signal;
2419 int thold = bss_conf->cqm_rssi_thold;
2420 int hyst = bss_conf->cqm_rssi_hyst;
2421 if (sig < thold &&
2422 (last_event == 0 || sig < last_event - hyst)) {
2423 ifmgd->last_cqm_event_signal = sig;
2424 ieee80211_cqm_rssi_notify(
2425 &sdata->vif,
2426 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2427 GFP_KERNEL);
2428 } else if (sig > thold &&
2429 (last_event == 0 || sig > last_event + hyst)) {
2430 ifmgd->last_cqm_event_signal = sig;
2431 ieee80211_cqm_rssi_notify(
2432 &sdata->vif,
2433 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2434 GFP_KERNEL);
2435 }
2436 }
2437
b291ba11 2438 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2439 mlme_dbg_ratelimited(sdata,
2440 "cancelling probereq poll due to a received beacon\n");
925e64c3 2441 mutex_lock(&local->mtx);
b291ba11 2442 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2443 ieee80211_run_deferred_scan(local);
2444 mutex_unlock(&local->mtx);
2445
4e751843
JB		 2446 mutex_lock(&local->iflist_mtx);
2447 ieee80211_recalc_ps(local, -1);
2448 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2449 }
2450
b291ba11
JB		 2451 /*
2452 * Push the beacon loss detection into the future since
2453 * we are processing a beacon from the AP just now.
2454 */
d3a910a8 2455 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2456
d91f36db
JB		 2457 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2458 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2459 len - baselen, &elems,
2460 care_about_ies, ncrc);
2461
2462 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2463 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2464 ifmgd->aid);
d91f36db 2465
25c9c875 2466 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2467 if (directed_tim) {
572e0012 2468 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2469 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2470 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2471 ieee80211_hw_config(local,
2472 IEEE80211_CONF_CHANGE_PS);
2473 }
572e0012 2474 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2475 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2476 local->pspolling = true;
2477
2478 /*
2479 * Here is assumed that the driver will be
2480 * able to send ps-poll frame and receive a
2481 * response even though power save mode is
2482 * enabled, but some drivers might require
2483 * to disable power save here. This needs
2484 * to be investigated.
2485 */
2486 ieee80211_send_pspoll(local, sdata);
2487 }
a97b77b9
VN		 2488 }
2489 }
7a5158ef 2490
d8ec4433 2491 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2492 return;
2493 ifmgd->beacon_crc = ncrc;
d8ec4433 2494 ifmgd->beacon_crc_valid = true;
30196673 2495
7d25745d
JB		 2496 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2497 true);
2498
2499 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2500 elems.wmm_param_len))
2501 changed |= BSS_CHANGED_QOS;
2502
7a5158ef
JB		 2503 if (elems.erp_info && elems.erp_info_len >= 1) {
2504 erp_valid = true;
2505 erp_value = elems.erp_info[0];
2506 } else {
2507 erp_valid = false;
50c4afb9 2508 }
7a5158ef
JB		 2509 changed |= ieee80211_handle_bss_capability(sdata,
2510 le16_to_cpu(mgmt->u.beacon.capab_info),
2511 erp_valid, erp_value);
f0706e82 2512
d3c990fb 2513
074d46d1 2514 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2515 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2516 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2517
2518 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2519
24398e39
JB		 2520 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2521 bssid, true);
d3c990fb
RR		 2522 }
2523
8b19e6ca 2524 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2525 if (elems.country_elem) {
a8302de9
VT		 2526 /* TODO: IBSS also needs this */
2527 if (elems.pwr_constr_elem)
2528 ieee80211_handle_pwr_constr(sdata,
2529 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2530 elems.pwr_constr_elem,
2531 elems.pwr_constr_elem_len);
3f2355cb
LR		 2532 }
2533
471b3efd 2534 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2535}
2536
1fa57d01
JB		 2537void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2538 struct sk_buff *skb)
f0706e82 2539{
77fdaa12 2540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2541 struct ieee80211_rx_status *rx_status;
f0706e82 2542 struct ieee80211_mgmt *mgmt;
66e67e41 2543 struct cfg80211_bss *bss = NULL;
77fdaa12 2544 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2545 u16 fc;
2546
f0706e82
JB		 2547 rx_status = (struct ieee80211_rx_status *) skb->cb;
2548 mgmt = (struct ieee80211_mgmt *) skb->data;
2549 fc = le16_to_cpu(mgmt->frame_control);
2550
77fdaa12
JB		 2551 mutex_lock(&ifmgd->mtx);
2552
66e67e41
JB		 2553 switch (fc & IEEE80211_FCTL_STYPE) {
2554 case IEEE80211_STYPE_BEACON:
2555 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2556 break;
2557 case IEEE80211_STYPE_PROBE_RESP:
2558 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2559 break;
2560 case IEEE80211_STYPE_AUTH:
2561 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2562 break;
2563 case IEEE80211_STYPE_DEAUTH:
2564 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2565 break;
2566 case IEEE80211_STYPE_DISASSOC:
2567 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2568 break;
2569 case IEEE80211_STYPE_ASSOC_RESP:
2570 case IEEE80211_STYPE_REASSOC_RESP:
2571 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2572 break;
2573 case IEEE80211_STYPE_ACTION:
2574 switch (mgmt->u.action.category) {
2575 case WLAN_CATEGORY_SPECTRUM_MGMT:
2576 ieee80211_sta_process_chanswitch(sdata,
2577 &mgmt->u.action.u.chan_switch.sw_elem,
2578 (void *)ifmgd->associated->priv,
2579 rx_status->mactime);
77fdaa12 2580 break;
77fdaa12 2581 }
77fdaa12 2582 }
77fdaa12
JB		 2583 mutex_unlock(&ifmgd->mtx);
2584
66e67e41
JB		 2585 switch (rma) {
2586 case RX_MGMT_NONE:
2587 /* no action */
2588 break;
2589 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2590 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2591 break;
2592 case RX_MGMT_CFG80211_DISASSOC:
2593 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2594 break;
2595 case RX_MGMT_CFG80211_RX_AUTH:
2596 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2597 break;
2598 case RX_MGMT_CFG80211_RX_ASSOC:
2599 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2600 break;
2601 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2602 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2603 break;
2604 default:
2605 WARN(1, "unexpected: %d", rma);
b054b747 2606 }
f0706e82
JB		 2607}
2608
9c6bd790 2609static void ieee80211_sta_timer(unsigned long data)
f0706e82 2610{
60f8b39c
JB		 2611 struct ieee80211_sub_if_data *sdata =
2612 (struct ieee80211_sub_if_data *) data;
46900298 2613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2614 struct ieee80211_local *local = sdata->local;
f0706e82 2615
5bb644a0
JB		 2616 if (local->quiescing) {
2617 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2618 return;
2619 }
2620
64592c8f 2621 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2622}
2623
04ac3c0e 2624static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2625 u8 *bssid, u8 reason)
04ac3c0e
FF		 2626{
2627 struct ieee80211_local *local = sdata->local;
2628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2629 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2630
37ad3888
JB		 2631 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2632 false, frame_buf);
04ac3c0e 2633 mutex_unlock(&ifmgd->mtx);
37ad3888 2634
04ac3c0e
FF		 2635 /*
2636 * must be outside lock due to cfg80211,
2637 * but that's not a problem.
2638 */
5fef7dbc 2639 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2640
2641 mutex_lock(&local->mtx);
2642 ieee80211_recalc_idle(local);
2643 mutex_unlock(&local->mtx);
2644
04ac3c0e
FF		 2645 mutex_lock(&ifmgd->mtx);
2646}
2647
66e67e41
JB		 2648static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2649{
2650 struct ieee80211_local *local = sdata->local;
2651 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2652 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2653
2654 lockdep_assert_held(&ifmgd->mtx);
2655
2656 if (WARN_ON_ONCE(!auth_data))
2657 return -EINVAL;
2658
66e67e41
JB		 2659 auth_data->tries++;
2660
2661 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2662 sdata_info(sdata, "authentication with %pM timed out\n",
2663 auth_data->bss->bssid);
66e67e41
JB		 2664
2665 /*
2666 * Most likely AP is not in the range so remove the
2667 * bss struct for that AP.
2668 */
2669 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2670
2671 return -ETIMEDOUT;
2672 }
2673
a1845fc7
JB		 2674 drv_mgd_prepare_tx(local, sdata);
2675
66e67e41 2676 if (auth_data->bss->proberesp_ies) {
bdcbd8e0
JB		 2677 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2678 auth_data->bss->bssid, auth_data->tries,
2679 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2680
2681 auth_data->expected_transaction = 2;
2682 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2683 auth_data->ie, auth_data->ie_len,
2684 auth_data->bss->bssid,
2685 auth_data->bss->bssid, NULL, 0, 0);
2686 } else {
2687 const u8 *ssidie;
2688
bdcbd8e0
JB		 2689 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2690 auth_data->bss->bssid, auth_data->tries,
2691 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2692
2693 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2694 if (!ssidie)
2695 return -EINVAL;
2696 /*
2697 * Direct probe is sent to broadcast address as some APs
2698 * will not answer to direct packet in unassociated state.
2699 */
2700 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2701 NULL, 0, (u32) -1, true, false);
2702 }
2703
2704 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2705 run_again(ifmgd, auth_data->timeout);
2706
2707 return 0;
2708}
2709
2710static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2711{
2712 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2713 struct ieee80211_local *local = sdata->local;
2714
2715 lockdep_assert_held(&sdata->u.mgd.mtx);
2716
66e67e41
JB		 2717 assoc_data->tries++;
2718 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2719 sdata_info(sdata, "association with %pM timed out\n",
2720 assoc_data->bss->bssid);
66e67e41
JB		 2721
2722 /*
2723 * Most likely AP is not in the range so remove the
2724 * bss struct for that AP.
2725 */
2726 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2727
2728 return -ETIMEDOUT;
2729 }
2730
bdcbd8e0
JB		 2731 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2732 assoc_data->bss->bssid, assoc_data->tries,
2733 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2734 ieee80211_send_assoc(sdata);
2735
2736 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2737 run_again(&sdata->u.mgd, assoc_data->timeout);
2738
2739 return 0;
2740}
2741
1fa57d01 2742void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2743{
9c6bd790 2744 struct ieee80211_local *local = sdata->local;
1fa57d01 2745 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2746
77fdaa12
JB		 2747 mutex_lock(&ifmgd->mtx);
2748
66e67e41
JB		 2749 if (ifmgd->auth_data &&
2750 time_after(jiffies, ifmgd->auth_data->timeout)) {
2751 if (ifmgd->auth_data->done) {
2752 /*
2753 * ok ... we waited for assoc but userspace didn't,
2754 * so let's just kill the auth data
2755 */
2756 ieee80211_destroy_auth_data(sdata, false);
2757 } else if (ieee80211_probe_auth(sdata)) {
2758 u8 bssid[ETH_ALEN];
2759
2760 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2761
2762 ieee80211_destroy_auth_data(sdata, false);
2763
2764 mutex_unlock(&ifmgd->mtx);
2765 cfg80211_send_auth_timeout(sdata->dev, bssid);
2766 mutex_lock(&ifmgd->mtx);
2767 }
2768 } else if (ifmgd->auth_data)
2769 run_again(ifmgd, ifmgd->auth_data->timeout);
2770
2771 if (ifmgd->assoc_data &&
2772 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2773 if (!ifmgd->assoc_data->have_beacon ||
2774 ieee80211_do_assoc(sdata)) {
2775 u8 bssid[ETH_ALEN];
2776
2777 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2778
2779 ieee80211_destroy_assoc_data(sdata, false);
2780
2781 mutex_unlock(&ifmgd->mtx);
2782 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2783 mutex_lock(&ifmgd->mtx);
2784 }
2785 } else if (ifmgd->assoc_data)
2786 run_again(ifmgd, ifmgd->assoc_data->timeout);
2787
b291ba11
JB		 2788 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2789 IEEE80211_STA_CONNECTION_POLL) &&
2790 ifmgd->associated) {
a43abf29 2791 u8 bssid[ETH_ALEN];
72a8a3ed 2792 int max_tries;
a43abf29 2793
0c1ad2ca 2794 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2795
72a8a3ed 2796 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2797 max_tries = max_nullfunc_tries;
72a8a3ed 2798 else
180205bd 2799 max_tries = max_probe_tries;
72a8a3ed 2800
4e5ff376
FF		 2801 /* ACK received for nullfunc probing frame */
2802 if (!ifmgd->probe_send_count)
2803 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2804 else if (ifmgd->nullfunc_failed) {
2805 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2806 mlme_dbg(sdata,
2807 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2808 bssid, ifmgd->probe_send_count,
2809 max_tries);
04ac3c0e
FF		 2810 ieee80211_mgd_probe_ap_send(sdata);
2811 } else {
bdcbd8e0
JB		 2812 mlme_dbg(sdata,
2813 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2814 bssid);
95acac61
JB		 2815 ieee80211_sta_connection_lost(sdata, bssid,
2816 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2817 }
2818 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2819 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2820 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2821 mlme_dbg(sdata,
2822 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2823 bssid, probe_wait_ms);
95acac61
JB		 2824 ieee80211_sta_connection_lost(sdata, bssid,
2825 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2826 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2827 mlme_dbg(sdata,
2828 "No probe response from AP %pM after %dms, try %d/%i\n",
2829 bssid, probe_wait_ms,
2830 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2831 ieee80211_mgd_probe_ap_send(sdata);
2832 } else {
b291ba11
JB		 2833 /*
2834 * We actually lost the connection ... or did we?
2835 * Let's make sure!
2836 */
b38afa87
BG		 2837 wiphy_debug(local->hw.wiphy,
2838 "%s: No probe response from AP %pM"
2839 " after %dms, disconnecting.\n",
2840 sdata->name,
180205bd 2841 bssid, probe_wait_ms);
04ac3c0e 2842
95acac61
JB		 2843 ieee80211_sta_connection_lost(sdata, bssid,
2844 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2845 }
2846 }
2847
77fdaa12 2848 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2849
2850 mutex_lock(&local->mtx);
2851 ieee80211_recalc_idle(local);
2852 mutex_unlock(&local->mtx);
f0706e82
JB		 2853}
2854
b291ba11
JB		 2855static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2856{
2857 struct ieee80211_sub_if_data *sdata =
2858 (struct ieee80211_sub_if_data *) data;
2859 struct ieee80211_local *local = sdata->local;
2860
2861 if (local->quiescing)
2862 return;
2863
1e4dcd01
JO		 2864 ieee80211_queue_work(&sdata->local->hw,
2865 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2866}
2867
2868static void ieee80211_sta_conn_mon_timer(unsigned long data)
2869{
2870 struct ieee80211_sub_if_data *sdata =
2871 (struct ieee80211_sub_if_data *) data;
2872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2873 struct ieee80211_local *local = sdata->local;
2874
2875 if (local->quiescing)
2876 return;
2877
42935eca 2878 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2879}
2880
2881static void ieee80211_sta_monitor_work(struct work_struct *work)
2882{
2883 struct ieee80211_sub_if_data *sdata =
2884 container_of(work, struct ieee80211_sub_if_data,
2885 u.mgd.monitor_work);
2886
2887 ieee80211_mgd_probe_ap(sdata, false);
2888}
2889
9c6bd790
JB		 2890static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2891{
494f1fe5
EP		 2892 u32 flags;
2893
ad935687 2894 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2895 __ieee80211_stop_poll(sdata);
ad935687 2896
b291ba11 2897 /* let's probe the connection once */
494f1fe5
EP		 2898 flags = sdata->local->hw.flags;
2899 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2900 ieee80211_queue_work(&sdata->local->hw,
2901 &sdata->u.mgd.monitor_work);
b291ba11 2902 /* and do all the other regular work too */
64592c8f 2903 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2904 }
9c6bd790 2905}
f0706e82 2906
5bb644a0
JB		 2907#ifdef CONFIG_PM
2908void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2909{
2910 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2911
2912 /*
2913 * we need to use atomic bitops for the running bits
2914 * only because both timers might fire at the same
2915 * time -- the code here is properly synchronised.
2916 */
2917
d1f5b7a3
JB		 2918 cancel_work_sync(&ifmgd->request_smps_work);
2919
0ecfe806 2920 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2921 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2922 if (del_timer_sync(&ifmgd->timer))
2923 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2924
2925 cancel_work_sync(&ifmgd->chswitch_work);
2926 if (del_timer_sync(&ifmgd->chswitch_timer))
2927 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2928
b291ba11
JB		 2929 /* these will just be re-established on connection */
2930 del_timer_sync(&ifmgd->conn_mon_timer);
2931 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2932}
2933
2934void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2935{
2936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2937
676b58c2
RM		 2938 if (!ifmgd->associated)
2939 return;
2940
95acac61
JB		 2941 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2942 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2943 mutex_lock(&ifmgd->mtx);
2944 if (ifmgd->associated) {
bdcbd8e0
JB		 2945 mlme_dbg(sdata,
2946 "driver requested disconnect after resume\n");
95acac61
JB		 2947 ieee80211_sta_connection_lost(sdata,
2948 ifmgd->associated->bssid,
2949 WLAN_REASON_UNSPECIFIED);
2950 mutex_unlock(&ifmgd->mtx);
2951 return;
2952 }
2953 mutex_unlock(&ifmgd->mtx);
2954 }
2955
5bb644a0
JB		 2956 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2957 add_timer(&ifmgd->timer);
2958 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2959 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2960 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2961
2962 mutex_lock(&sdata->local->mtx);
46090979 2963 ieee80211_restart_sta_timer(sdata);
925e64c3 2964 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2965}
2966#endif
2967
9c6bd790
JB		 2968/* interface setup */
2969void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2970{
46900298 2971 struct ieee80211_if_managed *ifmgd;
988c0f72 2972
46900298 2973 ifmgd = &sdata->u.mgd;
b291ba11 2974 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2975 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2976 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2977 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2978 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2979 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2980 (unsigned long) sdata);
b291ba11
JB		 2981 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2982 (unsigned long) sdata);
2983 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2984 (unsigned long) sdata);
46900298 2985 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2986 (unsigned long) sdata);
9c6bd790 2987
ab1faead 2988 ifmgd->flags = 0;
1478acb3 2989 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2990 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2991 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2992
77fdaa12 2993 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2994
2995 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2996 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2997 else
2998 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2999}
3000
77fdaa12
JB		 3001/* scan finished notification */
3002void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3003{
31ee67a1 3004 struct ieee80211_sub_if_data *sdata;
60f8b39c 3005
77fdaa12
JB		 3006 /* Restart STA timers */
3007 rcu_read_lock();
3008 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3009 ieee80211_restart_sta_timer(sdata);
3010 rcu_read_unlock();
3011}
60f8b39c 3012
77fdaa12
JB		 3013int ieee80211_max_network_latency(struct notifier_block *nb,
3014 unsigned long data, void *dummy)
3015{
3016 s32 latency_usec = (s32) data;
3017 struct ieee80211_local *local =
3018 container_of(nb, struct ieee80211_local,
3019 network_latency_notifier);
1fa6f4af 3020
77fdaa12
JB		 3021 mutex_lock(&local->iflist_mtx);
3022 ieee80211_recalc_ps(local, latency_usec);
3023 mutex_unlock(&local->iflist_mtx);
dfe67012 3024
77fdaa12 3025 return 0;
9c6bd790
JB		 3026}
3027
a1cf775d 3028static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 3029 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 3030{
3031 struct ieee80211_local *local = sdata->local;
3032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3033 struct ieee80211_bss *bss = (void *)cbss->priv;
6df653c7 3034 struct sta_info *sta = NULL;
a1cf775d
JB		 3035 bool have_sta = false;
3036 int err;
24398e39
JB		 3037 int ht_cfreq;
3038 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3039 const u8 *ht_oper_ie;
3040 const struct ieee80211_ht_operation *ht_oper = NULL;
3041 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3042
3043 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3044 return -EINVAL;
3045
3046 if (assoc) {
3047 rcu_read_lock();
5d6a1b06 3048 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3049 rcu_read_unlock();
3050 }
3051
3052 if (!have_sta) {
5d6a1b06 3053 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3054 if (!sta)
3055 return -ENOMEM;
3056 }
3057
3058 mutex_lock(&local->mtx);
3059 ieee80211_recalc_idle(sdata->local);
3060 mutex_unlock(&local->mtx);
3061
3062 /* switch to the right channel */
24398e39
JB		 3063 sband = local->hw.wiphy->bands[cbss->channel->band];
3064
3065 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3066
3067 if (sband->ht_cap.ht_supported) {
3068 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3069 cbss->information_elements,
3070 cbss->len_information_elements);
3071 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3072 ht_oper = (void *)(ht_oper_ie + 2);
3073 }
3074
3075 if (ht_oper) {
3076 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3077 cbss->channel->band);
3078 /* check that channel matches the right operating channel */
3079 if (cbss->channel->center_freq != ht_cfreq) {
3080 /*
3081 * It's possible that some APs are confused here;
3082 * Netgear WNDR3700 sometimes reports 4 higher than
3083 * the actual channel in association responses, but
3084 * since we look at probe response/beacon data here
3085 * it should be OK.
3086 */
bdcbd8e0
JB		 3087 sdata_info(sdata,
3088 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3089 cbss->channel->center_freq,
3090 ht_cfreq, ht_oper->primary_chan,
3091 cbss->channel->band);
24398e39
JB		 3092 ht_oper = NULL;
3093 }
3094 }
3095
3096 if (ht_oper) {
3097 channel_type = NL80211_CHAN_HT20;
3098
3099 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3100 switch (ht_oper->ht_param &
3101 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3102 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3103 channel_type = NL80211_CHAN_HT40PLUS;
3104 break;
3105 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3106 channel_type = NL80211_CHAN_HT40MINUS;
3107 break;
3108 }
3109 }
3110 }
3111
3112 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3113 /* can only fail due to HT40+/- mismatch */
3114 channel_type = NL80211_CHAN_HT20;
bdcbd8e0
JB		 3115 sdata_info(sdata,
3116 "disabling 40 MHz due to multi-vif mismatch\n");
24398e39
JB		 3117 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3118 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3119 channel_type));
3120 }
3121
5d6a1b06 3122 local->oper_channel = cbss->channel;
6aee4ca3 3123 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
a1cf775d 3124
6df653c7 3125 if (sta) {
5d6a1b06
JB		 3126 u32 rates = 0, basic_rates = 0;
3127 bool have_higher_than_11mbit;
3128 int min_rate = INT_MAX, min_rate_index = -1;
3129
5d6a1b06
JB		 3130 ieee80211_get_rates(sband, bss->supp_rates,
3131 bss->supp_rates_len,
3132 &rates, &basic_rates,
3133 &have_higher_than_11mbit,
3134 &min_rate, &min_rate_index);
3135
3136 /*
3137 * This used to be a workaround for basic rates missing
3138 * in the association response frame. Now that we no
3139 * longer use the basic rates from there, it probably
3140 * doesn't happen any more, but keep the workaround so
3141 * in case some *other* APs are buggy in different ways
3142 * we can connect -- with a warning.
3143 */
3144 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3145 sdata_info(sdata,
3146 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3147 basic_rates = BIT(min_rate_index);
3148 }
3149
3150 sta->sta.supp_rates[cbss->channel->band] = rates;
3151 sdata->vif.bss_conf.basic_rates = basic_rates;
3152
3153 /* cf. IEEE 802.11 9.2.12 */
3154 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3155 have_higher_than_11mbit)
3156 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3157 else
3158 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3159
3160 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3161
8c358bcd
JB		 3162 /* set timing information */
3163 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3164 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3165 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3166
3167 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3168 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3169 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3170 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3171
3172 if (assoc)
3173 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3174
3175 err = sta_info_insert(sta);
3176 sta = NULL;
3177 if (err) {
bdcbd8e0
JB		 3178 sdata_info(sdata,
3179 "failed to insert STA entry for the AP (error %d)\n",
3180 err);
a1cf775d
JB		 3181 return err;
3182 }
3183 } else
b203ca39 3184 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3185
3186 return 0;
3187}
3188
77fdaa12
JB		 3189/* config hooks */
3190int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3191 struct cfg80211_auth_request *req)
9c6bd790 3192{
66e67e41
JB		 3193 struct ieee80211_local *local = sdata->local;
3194 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3195 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3196 u16 auth_alg;
66e67e41
JB		 3197 int err;
3198
3199 /* prepare auth data structure */
9c6bd790 3200
77fdaa12
JB		 3201 switch (req->auth_type) {
3202 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3203 auth_alg = WLAN_AUTH_OPEN;
3204 break;
3205 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3206 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3207 return -EOPNOTSUPP;
77fdaa12
JB		 3208 auth_alg = WLAN_AUTH_SHARED_KEY;
3209 break;
3210 case NL80211_AUTHTYPE_FT:
3211 auth_alg = WLAN_AUTH_FT;
3212 break;
3213 case NL80211_AUTHTYPE_NETWORK_EAP:
3214 auth_alg = WLAN_AUTH_LEAP;
3215 break;
3216 default:
3217 return -EOPNOTSUPP;
60f8b39c 3218 }
77fdaa12 3219
66e67e41
JB		 3220 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3221 if (!auth_data)
9c6bd790 3222 return -ENOMEM;
77fdaa12 3223
66e67e41 3224 auth_data->bss = req->bss;
77fdaa12
JB		 3225
3226 if (req->ie && req->ie_len) {
66e67e41
JB		 3227 memcpy(auth_data->ie, req->ie, req->ie_len);
3228 auth_data->ie_len = req->ie_len;
9c6bd790 3229 }
77fdaa12 3230
fffd0934 3231 if (req->key && req->key_len) {
66e67e41
JB		 3232 auth_data->key_len = req->key_len;
3233 auth_data->key_idx = req->key_idx;
3234 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3235 }
3236
66e67e41 3237 auth_data->algorithm = auth_alg;
60f8b39c 3238
66e67e41 3239 /* try to authenticate/probe */
2a33bee2 3240
66e67e41 3241 mutex_lock(&ifmgd->mtx);
2a33bee2 3242
66e67e41
JB		 3243 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3244 ifmgd->assoc_data) {
3245 err = -EBUSY;
3246 goto err_free;
2a33bee2
GE		 3247 }
3248
66e67e41
JB		 3249 if (ifmgd->auth_data)
3250 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3251
66e67e41
JB		 3252 /* prep auth_data so we don't go into idle on disassoc */
3253 ifmgd->auth_data = auth_data;
af6b6374 3254
66e67e41 3255 if (ifmgd->associated)
37ad3888 3256 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3257
bdcbd8e0 3258 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3259
a1cf775d
JB		 3260 err = ieee80211_prep_connection(sdata, req->bss, false);
3261 if (err)
66e67e41 3262 goto err_clear;
af6b6374 3263
66e67e41
JB		 3264 err = ieee80211_probe_auth(sdata);
3265 if (err) {
66e67e41
JB		 3266 sta_info_destroy_addr(sdata, req->bss->bssid);
3267 goto err_clear;
3268 }
3269
3270 /* hold our own reference */
3271 cfg80211_ref_bss(auth_data->bss);
3272 err = 0;
3273 goto out_unlock;
3274
3275 err_clear:
3276 ifmgd->auth_data = NULL;
3277 err_free:
3278 kfree(auth_data);
3279 out_unlock:
3280 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3281
66e67e41 3282 return err;
af6b6374
JB		 3283}
3284
77fdaa12
JB		 3285int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3286 struct cfg80211_assoc_request *req)
f0706e82 3287{
66e67e41 3288 struct ieee80211_local *local = sdata->local;
77fdaa12 3289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3290 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3291 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3292 struct ieee80211_supported_band *sband;
9dde6423 3293 const u8 *ssidie, *ht_ie;
2a33bee2 3294 int i, err;
f0706e82 3295
66e67e41
JB		 3296 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3297 if (!ssidie)
3298 return -EINVAL;
3299
3300 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3301 if (!assoc_data)
3302 return -ENOMEM;
3303
77fdaa12 3304 mutex_lock(&ifmgd->mtx);
9c87ba67 3305
66e67e41 3306 if (ifmgd->associated)
37ad3888 3307 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3308
3309 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3310 err = -EBUSY;
3311 goto err_free;
af6b6374 3312 }
77fdaa12 3313
66e67e41
JB		 3314 if (ifmgd->assoc_data) {
3315 err = -EBUSY;
3316 goto err_free;
3317 }
77fdaa12 3318
66e67e41
JB		 3319 if (ifmgd->auth_data) {
3320 bool match;
3321
3322 /* keep sta info, bssid if matching */
b203ca39 3323 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3324 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3325 }
3326
66e67e41
JB		 3327 /* prepare assoc data */
3328
77fdaa12 3329 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3330 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
d545daba 3331 ifmgd->flags &= ~IEEE80211_STA_DISABLE_VHT;
77fdaa12 3332
d8ec4433
JO		 3333 ifmgd->beacon_crc_valid = false;
3334
de5036aa
JB		 3335 /*
3336 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3337 * We still associate in non-HT mode (11a/b/g) if any one of these
3338 * ciphers is configured as pairwise.
3339 * We can set this to true for non-11n hardware, that'll be checked
3340 * separately along with the peer capabilities.
3341 */
1c4cb928 3342 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3343 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3344 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3345 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3346 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba 3347 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3348 netdev_info(sdata->dev,
d545daba 3349 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3350 }
3351 }
77fdaa12 3352
d545daba 3353 if (req->flags & ASSOC_REQ_DISABLE_HT) {
ef96a842 3354 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba
MP		 3355 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3356 }
ef96a842 3357
4e74bfdb
JB		 3358 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3359 sband = local->hw.wiphy->bands[req->bss->channel->band];
3360 if (!sband->ht_cap.ht_supported ||
1c4cb928 3361 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3362 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3363 netdev_info(sdata->dev,
3364 "disabling HT as WMM/QoS is not supported\n");
3365 }
4e74bfdb 3366
d545daba
MP		 3367 /* disable VHT if we don't support it or the AP doesn't use WMM */
3368 if (!sband->vht_cap.vht_supported ||
3369 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3370 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3371 netdev_info(sdata->dev,
3372 "disabling VHT as WMM/QoS is not supported\n");
3373 }
3374
ef96a842
BG		 3375 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3376 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3377 sizeof(ifmgd->ht_capa_mask));
3378
77fdaa12 3379 if (req->ie && req->ie_len) {
66e67e41
JB		 3380 memcpy(assoc_data->ie, req->ie, req->ie_len);
3381 assoc_data->ie_len = req->ie_len;
3382 }
f679f65d 3383
66e67e41 3384 assoc_data->bss = req->bss;
f679f65d 3385
af6b6374
JB		 3386 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3387 if (ifmgd->powersave)
3388 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3389 else
3390 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3391 } else
3392 ifmgd->ap_smps = ifmgd->req_smps;
3393
66e67e41 3394 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3395 assoc_data->wmm = bss->wmm_used &&
3396 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3397 assoc_data->supp_rates = bss->supp_rates;
3398 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3399
3400 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3401 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3402 assoc_data->ap_ht_param =
3403 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3404 else
3405 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3406
ab13315a
KV		 3407 if (bss->wmm_used && bss->uapsd_supported &&
3408 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3409 assoc_data->uapsd = true;
ab13315a
KV		 3410 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3411 } else {
76f0303d 3412 assoc_data->uapsd = false;
ab13315a
KV		 3413 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3414 }
3415
66e67e41
JB		 3416 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3417 assoc_data->ssid_len = ssidie[1];
63f170e0 3418
77fdaa12 3419 if (req->prev_bssid)
66e67e41 3420 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3421
3422 if (req->use_mfp) {
3423 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3424 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3425 } else {
3426 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3427 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3428 }
3429
3430 if (req->crypto.control_port)
3431 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3432 else
3433 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3434
a621fa4d
JB		 3435 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3436 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3437
66e67e41
JB		 3438 /* kick off associate process */
3439
3440 ifmgd->assoc_data = assoc_data;
3441
a1cf775d
JB		 3442 err = ieee80211_prep_connection(sdata, req->bss, true);
3443 if (err)
3444 goto err_clear;
66e67e41
JB		 3445
3446 if (!bss->dtim_period &&
3447 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3448 /*
3449 * Wait up to one beacon interval ...
3450 * should this be more if we miss one?
3451 */
bdcbd8e0
JB		 3452 sdata_info(sdata, "waiting for beacon from %pM\n",
3453 ifmgd->bssid);
3f9768a5 3454 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3455 } else {
3456 assoc_data->have_beacon = true;
3457 assoc_data->sent_assoc = false;
3458 assoc_data->timeout = jiffies;
3459 }
3460 run_again(ifmgd, assoc_data->timeout);
3461
fcff4f10
PS		 3462 if (bss->corrupt_data) {
3463 char *corrupt_type = "data";
3464 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3465 if (bss->corrupt_data &
3466 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3467 corrupt_type = "beacon and probe response";
3468 else
3469 corrupt_type = "beacon";
3470 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3471 corrupt_type = "probe response";
bdcbd8e0
JB		 3472 sdata_info(sdata, "associating with AP with corrupt %s\n",
3473 corrupt_type);
fcff4f10
PS		 3474 }
3475
66e67e41
JB		 3476 err = 0;
3477 goto out;
3478 err_clear:
3479 ifmgd->assoc_data = NULL;
3480 err_free:
3481 kfree(assoc_data);
3482 out:
3483 mutex_unlock(&ifmgd->mtx);
3484
3485 return err;
f0706e82
JB		 3486}
3487
77fdaa12 3488int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3489 struct cfg80211_deauth_request *req)
f0706e82 3490{
46900298 3491 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3492 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3493
77fdaa12
JB		 3494 mutex_lock(&ifmgd->mtx);
3495
37ad3888 3496 if (ifmgd->auth_data) {
66e67e41 3497 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3498 mutex_unlock(&ifmgd->mtx);
66e67e41 3499 return 0;
af6b6374 3500 }
77fdaa12 3501
bdcbd8e0
JB		 3502 sdata_info(sdata,
3503 "deauthenticating from %pM by local choice (reason=%d)\n",
3504 req->bssid, req->reason_code);
0ff71613 3505
37ad3888 3506 if (ifmgd->associated &&
b203ca39 3507 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
37ad3888 3508 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3509 req->reason_code, true, frame_buf);
37ad3888
JB		 3510 else
3511 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3512 IEEE80211_STYPE_DEAUTH,
3513 req->reason_code, true,
3514 frame_buf);
3515 mutex_unlock(&ifmgd->mtx);
3516
5fef7dbc 3517 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3518
7da7cc1d 3519 mutex_lock(&sdata->local->mtx);
bc83b681 3520 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3521 mutex_unlock(&sdata->local->mtx);
bc83b681 3522
f0706e82
JB		 3523 return 0;
3524}
84363e6e 3525
77fdaa12 3526int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3527 struct cfg80211_disassoc_request *req)
9c6bd790 3528{
77fdaa12 3529 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3530 u8 bssid[ETH_ALEN];
5fef7dbc 3531 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3532
77fdaa12 3533 mutex_lock(&ifmgd->mtx);
10f644a4 3534
8d8b261a
JB		 3535 /*
3536 * cfg80211 should catch this ... but it's racy since
3537 * we can receive a disassoc frame, process it, hand it
3538 * to cfg80211 while that's in a locked section already
3539 * trying to tell us that the user wants to disconnect.
3540 */
0c1ad2ca 3541 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3542 mutex_unlock(&ifmgd->mtx);
3543 return -ENOLINK;
3544 }
3545
bdcbd8e0
JB		 3546 sdata_info(sdata,
3547 "disassociating from %pM by local choice (reason=%d)\n",
3548 req->bss->bssid, req->reason_code);
0ff71613 3549
e69e95db 3550 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3551 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3552 req->reason_code, !req->local_state_change,
3553 frame_buf);
77fdaa12 3554 mutex_unlock(&ifmgd->mtx);
10f644a4 3555
5fef7dbc 3556 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3557
7da7cc1d 3558 mutex_lock(&sdata->local->mtx);
bc83b681 3559 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3560 mutex_unlock(&sdata->local->mtx);
bc83b681 3561
10f644a4
JB		 3562 return 0;
3563}
026331c4 3564
afa762f6 3565void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3566{
3567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3568
3569 mutex_lock(&ifmgd->mtx);
3570 if (ifmgd->assoc_data)
3571 ieee80211_destroy_assoc_data(sdata, false);
3572 if (ifmgd->auth_data)
3573 ieee80211_destroy_auth_data(sdata, false);
3574 del_timer_sync(&ifmgd->timer);
3575 mutex_unlock(&ifmgd->mtx);
3576}
3577
a97c13c3
JO		 3578void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3579 enum nl80211_cqm_rssi_threshold_event rssi_event,
3580 gfp_t gfp)
3581{
3582 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3583
b5878a2d
JB		 3584 trace_api_cqm_rssi_notify(sdata, rssi_event);
3585
a97c13c3
JO		 3586 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3587}
3588EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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