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Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
77fdaa12
JB		 91/*
92 * All cfg80211 functions have to be called outside a locked
93 * section so that they can acquire a lock themselves... This
94 * is much simpler than queuing up things in cfg80211, but we
95 * do need some indirection for that here.
96 */
97enum rx_mgmt_action {
98 /* no action required */
99 RX_MGMT_NONE,
100
77fdaa12
JB		 101 /* caller must call cfg80211_send_deauth() */
102 RX_MGMT_CFG80211_DEAUTH,
103
104 /* caller must call cfg80211_send_disassoc() */
105 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 106
107 /* caller must call cfg80211_send_rx_auth() */
108 RX_MGMT_CFG80211_RX_AUTH,
109
110 /* caller must call cfg80211_send_rx_assoc() */
111 RX_MGMT_CFG80211_RX_ASSOC,
112
113 /* caller must call cfg80211_send_assoc_timeout() */
114 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 115};
116
5484e237 117/* utils */
77fdaa12
JB		 118static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
119{
46a5ebaf 120 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 121}
122
ca386f31
JB		 123/*
124 * We can have multiple work items (and connection probing)
125 * scheduling this timer, but we need to take care to only
126 * reschedule it when it should fire _earlier_ than it was
127 * asked for before, or if it's not pending right now. This
128 * function ensures that. Note that it then is required to
129 * run this function for all timeouts after the first one
130 * has happened -- the work that runs from this timer will
131 * do that.
132 */
66e67e41 133static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 134{
135 ASSERT_MGD_MTX(ifmgd);
136
137 if (!timer_pending(&ifmgd->timer) ||
138 time_before(timeout, ifmgd->timer.expires))
139 mod_timer(&ifmgd->timer, timeout);
140}
141
d3a910a8 142void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 143{
c1288b12 144 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 145 return;
146
7eeff74c
JB		 147 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
148 return;
149
b291ba11 150 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 151 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 152}
153
be099e82
LR		 154void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
155{
0c699c3a
LR		 156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157
8628172f
SG		 158 if (unlikely(!sdata->u.mgd.associated))
159 return;
160
be099e82
LR		 161 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
162 return;
163
164 mod_timer(&sdata->u.mgd.conn_mon_timer,
165 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 166
167 ifmgd->probe_send_count = 0;
be099e82
LR		 168}
169
5484e237 170static int ecw2cw(int ecw)
60f8b39c 171{
5484e237 172 return (1 << ecw) - 1;
60f8b39c
JB		 173}
174
24398e39
JB		 175static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
176 struct ieee80211_ht_operation *ht_oper,
177 const u8 *bssid, bool reconfig)
d5522e03
JB		 178{
179 struct ieee80211_local *local = sdata->local;
180 struct ieee80211_supported_band *sband;
d5522e03
JB		 181 struct sta_info *sta;
182 u32 changed = 0;
9ed6bcce 183 u16 ht_opmode;
64f68e5d 184 bool disable_40 = false;
d5522e03 185
568d6e28 186 sband = local->hw.wiphy->bands[local->oper_channel->band];
d5522e03 187
64f68e5d
JB		 188 switch (sdata->vif.bss_conf.channel_type) {
189 case NL80211_CHAN_HT40PLUS:
568d6e28 190 if (local->oper_channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d
JB		 191 disable_40 = true;
192 break;
193 case NL80211_CHAN_HT40MINUS:
568d6e28 194 if (local->oper_channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d
JB		 195 disable_40 = true;
196 break;
197 default:
198 break;
199 }
d5522e03 200
24398e39
JB		 201 /* This can change during the lifetime of the BSS */
202 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 203 disable_40 = true;
204
205 mutex_lock(&local->sta_mtx);
206 sta = sta_info_get(sdata, bssid);
d5522e03 207
64f68e5d
JB		 208 WARN_ON_ONCE(!sta);
209
210 if (sta && !sta->supports_40mhz)
211 disable_40 = true;
212
213 if (sta && (!reconfig ||
91a0099c 214 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 215 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 216
64f68e5d
JB		 217 if (disable_40)
218 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
219 else
220 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 221
64f68e5d 222 rate_control_rate_update(local, sband, sta,
8f727ef3 223 IEEE80211_RC_BW_CHANGED);
0aaffa9b 224 }
64f68e5d 225 mutex_unlock(&local->sta_mtx);
d5522e03 226
074d46d1 227 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 228
229 /* if bss configuration changed store the new one */
24398e39 230 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 231 changed |= BSS_CHANGED_HT;
9ed6bcce 232 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 233 }
234
235 return changed;
236}
237
9c6bd790
JB		 238/* frame sending functions */
239
66e67e41
JB		 240static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
241 struct ieee80211_supported_band *sband,
242 u32 *rates)
243{
244 int i, j, count;
245 *rates = 0;
246 count = 0;
247 for (i = 0; i < supp_rates_len; i++) {
248 int rate = (supp_rates[i] & 0x7F) * 5;
249
250 for (j = 0; j < sband->n_bitrates; j++)
251 if (sband->bitrates[j].bitrate == rate) {
252 *rates |= BIT(j);
253 count++;
254 break;
255 }
256 }
257
258 return count;
259}
260
261static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 262 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 263 struct ieee80211_supported_band *sband,
264 struct ieee80211_channel *channel,
265 enum ieee80211_smps_mode smps)
266{
66e67e41
JB		 267 u8 *pos;
268 u32 flags = channel->flags;
269 u16 cap;
270 struct ieee80211_sta_ht_cap ht_cap;
271
272 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
273
66e67e41
JB		 274 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
275 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
276
66e67e41
JB		 277 /* determine capability flags */
278 cap = ht_cap.cap;
279
9dde6423 280 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 281 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
282 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
283 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
284 cap &= ~IEEE80211_HT_CAP_SGI_40;
285 }
286 break;
287 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
288 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
289 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
290 cap &= ~IEEE80211_HT_CAP_SGI_40;
291 }
292 break;
293 }
294
24398e39
JB		 295 /*
296 * If 40 MHz was disabled associate as though we weren't
297 * capable of 40 MHz -- some broken APs will never fall
298 * back to trying to transmit in 20 MHz.
299 */
300 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
301 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
302 cap &= ~IEEE80211_HT_CAP_SGI_40;
303 }
304
66e67e41
JB		 305 /* set SM PS mode properly */
306 cap &= ~IEEE80211_HT_CAP_SM_PS;
307 switch (smps) {
308 case IEEE80211_SMPS_AUTOMATIC:
309 case IEEE80211_SMPS_NUM_MODES:
310 WARN_ON(1);
311 case IEEE80211_SMPS_OFF:
312 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
313 IEEE80211_HT_CAP_SM_PS_SHIFT;
314 break;
315 case IEEE80211_SMPS_STATIC:
316 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
317 IEEE80211_HT_CAP_SM_PS_SHIFT;
318 break;
319 case IEEE80211_SMPS_DYNAMIC:
320 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
321 IEEE80211_HT_CAP_SM_PS_SHIFT;
322 break;
323 }
324
325 /* reserve and fill IE */
326 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
327 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
328}
329
d545daba
MP		 330static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
331 struct sk_buff *skb,
332 struct ieee80211_supported_band *sband)
333{
334 u8 *pos;
335 u32 cap;
336 struct ieee80211_sta_vht_cap vht_cap;
337
338 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
339
340 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
341
342 /* determine capability flags */
343 cap = vht_cap.cap;
344
345 /* reserve and fill IE */
346 pos = skb_put(skb, sizeof(struct ieee80211_vht_capabilities) + 2);
347 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
348}
349
66e67e41
JB		 350static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
351{
352 struct ieee80211_local *local = sdata->local;
353 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
354 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
355 struct sk_buff *skb;
356 struct ieee80211_mgmt *mgmt;
357 u8 *pos, qos_info;
358 size_t offset = 0, noffset;
359 int i, count, rates_len, supp_rates_len;
360 u16 capab;
361 struct ieee80211_supported_band *sband;
362 u32 rates = 0;
66e67e41
JB		 363
364 lockdep_assert_held(&ifmgd->mtx);
365
366 sband = local->hw.wiphy->bands[local->oper_channel->band];
367
368 if (assoc_data->supp_rates_len) {
369 /*
370 * Get all rates supported by the device and the AP as
371 * some APs don't like getting a superset of their rates
372 * in the association request (e.g. D-Link DAP 1353 in
373 * b-only mode)...
374 */
375 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
376 assoc_data->supp_rates_len,
377 sband, &rates);
378 } else {
379 /*
380 * In case AP not provide any supported rates information
381 * before association, we send information element(s) with
382 * all rates that we support.
383 */
384 rates = ~0;
385 rates_len = sband->n_bitrates;
386 }
387
388 skb = alloc_skb(local->hw.extra_tx_headroom +
389 sizeof(*mgmt) + /* bit too much but doesn't matter */
390 2 + assoc_data->ssid_len + /* SSID */
391 4 + rates_len + /* (extended) rates */
392 4 + /* power capability */
393 2 + 2 * sband->n_channels + /* supported channels */
394 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d545daba 395 2 + sizeof(struct ieee80211_vht_capabilities) + /* VHT */
66e67e41
JB		 396 assoc_data->ie_len + /* extra IEs */
397 9, /* WMM */
398 GFP_KERNEL);
399 if (!skb)
400 return;
401
402 skb_reserve(skb, local->hw.extra_tx_headroom);
403
404 capab = WLAN_CAPABILITY_ESS;
405
406 if (sband->band == IEEE80211_BAND_2GHZ) {
407 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
408 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
409 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
410 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
411 }
412
413 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
414 capab |= WLAN_CAPABILITY_PRIVACY;
415
416 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
417 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
418 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
419
420 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
421 memset(mgmt, 0, 24);
422 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
423 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
424 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
425
426 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
427 skb_put(skb, 10);
428 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
429 IEEE80211_STYPE_REASSOC_REQ);
430 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
431 mgmt->u.reassoc_req.listen_interval =
432 cpu_to_le16(local->hw.conf.listen_interval);
433 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
434 ETH_ALEN);
435 } else {
436 skb_put(skb, 4);
437 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
438 IEEE80211_STYPE_ASSOC_REQ);
439 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
440 mgmt->u.assoc_req.listen_interval =
441 cpu_to_le16(local->hw.conf.listen_interval);
442 }
443
444 /* SSID */
445 pos = skb_put(skb, 2 + assoc_data->ssid_len);
446 *pos++ = WLAN_EID_SSID;
447 *pos++ = assoc_data->ssid_len;
448 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
449
450 /* add all rates which were marked to be used above */
451 supp_rates_len = rates_len;
452 if (supp_rates_len > 8)
453 supp_rates_len = 8;
454
455 pos = skb_put(skb, supp_rates_len + 2);
456 *pos++ = WLAN_EID_SUPP_RATES;
457 *pos++ = supp_rates_len;
458
459 count = 0;
460 for (i = 0; i < sband->n_bitrates; i++) {
461 if (BIT(i) & rates) {
462 int rate = sband->bitrates[i].bitrate;
463 *pos++ = (u8) (rate / 5);
464 if (++count == 8)
465 break;
466 }
467 }
468
469 if (rates_len > count) {
470 pos = skb_put(skb, rates_len - count + 2);
471 *pos++ = WLAN_EID_EXT_SUPP_RATES;
472 *pos++ = rates_len - count;
473
474 for (i++; i < sband->n_bitrates; i++) {
475 if (BIT(i) & rates) {
476 int rate = sband->bitrates[i].bitrate;
477 *pos++ = (u8) (rate / 5);
478 }
479 }
480 }
481
482 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
483 /* 1. power capabilities */
484 pos = skb_put(skb, 4);
485 *pos++ = WLAN_EID_PWR_CAPABILITY;
486 *pos++ = 2;
487 *pos++ = 0; /* min tx power */
488 *pos++ = local->oper_channel->max_power; /* max tx power */
489
490 /* 2. supported channels */
491 /* TODO: get this in reg domain format */
492 pos = skb_put(skb, 2 * sband->n_channels + 2);
493 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
494 *pos++ = 2 * sband->n_channels;
495 for (i = 0; i < sband->n_channels; i++) {
496 *pos++ = ieee80211_frequency_to_channel(
497 sband->channels[i].center_freq);
498 *pos++ = 1; /* one channel in the subband*/
499 }
500 }
501
502 /* if present, add any custom IEs that go before HT */
503 if (assoc_data->ie_len && assoc_data->ie) {
504 static const u8 before_ht[] = {
505 WLAN_EID_SSID,
506 WLAN_EID_SUPP_RATES,
507 WLAN_EID_EXT_SUPP_RATES,
508 WLAN_EID_PWR_CAPABILITY,
509 WLAN_EID_SUPPORTED_CHANNELS,
510 WLAN_EID_RSN,
511 WLAN_EID_QOS_CAPA,
512 WLAN_EID_RRM_ENABLED_CAPABILITIES,
513 WLAN_EID_MOBILITY_DOMAIN,
514 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
515 };
516 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
517 before_ht, ARRAY_SIZE(before_ht),
518 offset);
519 pos = skb_put(skb, noffset - offset);
520 memcpy(pos, assoc_data->ie + offset, noffset - offset);
521 offset = noffset;
522 }
523
4e74bfdb 524 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
9dde6423 525 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
66e67e41
JB		 526 sband, local->oper_channel, ifmgd->ap_smps);
527
d545daba
MP		 528 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
529 ieee80211_add_vht_ie(sdata, skb, sband);
530
66e67e41
JB		 531 /* if present, add any custom non-vendor IEs that go after HT */
532 if (assoc_data->ie_len && assoc_data->ie) {
533 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
534 assoc_data->ie_len,
535 offset);
536 pos = skb_put(skb, noffset - offset);
537 memcpy(pos, assoc_data->ie + offset, noffset - offset);
538 offset = noffset;
539 }
540
76f0303d
JB		 541 if (assoc_data->wmm) {
542 if (assoc_data->uapsd) {
dc41e4d4
EP		 543 qos_info = ifmgd->uapsd_queues;
544 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 545 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
546 } else {
547 qos_info = 0;
548 }
549
550 pos = skb_put(skb, 9);
551 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
552 *pos++ = 7; /* len */
553 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
554 *pos++ = 0x50;
555 *pos++ = 0xf2;
556 *pos++ = 2; /* WME */
557 *pos++ = 0; /* WME info */
558 *pos++ = 1; /* WME ver */
559 *pos++ = qos_info;
560 }
561
562 /* add any remaining custom (i.e. vendor specific here) IEs */
563 if (assoc_data->ie_len && assoc_data->ie) {
564 noffset = assoc_data->ie_len;
565 pos = skb_put(skb, noffset - offset);
566 memcpy(pos, assoc_data->ie + offset, noffset - offset);
567 }
568
a1845fc7
JB		 569 drv_mgd_prepare_tx(local, sdata);
570
66e67e41
JB		 571 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
572 ieee80211_tx_skb(sdata, skb);
573}
574
572e0012
KV		 575void ieee80211_send_pspoll(struct ieee80211_local *local,
576 struct ieee80211_sub_if_data *sdata)
577{
572e0012
KV		 578 struct ieee80211_pspoll *pspoll;
579 struct sk_buff *skb;
572e0012 580
d8cd189e
KV		 581 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
582 if (!skb)
572e0012 583 return;
572e0012 584
d8cd189e
KV		 585 pspoll = (struct ieee80211_pspoll *) skb->data;
586 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 587
62ae67be
JB		 588 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
589 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 590}
591
965bedad
JB		 592void ieee80211_send_nullfunc(struct ieee80211_local *local,
593 struct ieee80211_sub_if_data *sdata,
594 int powersave)
595{
596 struct sk_buff *skb;
d8cd189e 597 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 598 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 599
d8cd189e
KV		 600 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
601 if (!skb)
965bedad 602 return;
965bedad 603
d8cd189e 604 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 605 if (powersave)
d8cd189e 606 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 607
62ae67be 608 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 609 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
610 IEEE80211_STA_CONNECTION_POLL))
611 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
612
62ae67be 613 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 614}
615
d524215f
FF		 616static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
617 struct ieee80211_sub_if_data *sdata)
618{
619 struct sk_buff *skb;
620 struct ieee80211_hdr *nullfunc;
621 __le16 fc;
622
623 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
624 return;
625
626 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 627 if (!skb)
d524215f 628 return;
d15b8459 629
d524215f
FF		 630 skb_reserve(skb, local->hw.extra_tx_headroom);
631
632 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
633 memset(nullfunc, 0, 30);
634 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
635 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
636 nullfunc->frame_control = fc;
637 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
638 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
639 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
640 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
641
642 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
643 ieee80211_tx_skb(sdata, skb);
644}
645
cc32abd4
JB		 646/* spectrum management related things */
647static void ieee80211_chswitch_work(struct work_struct *work)
648{
649 struct ieee80211_sub_if_data *sdata =
650 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 651 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
652
9607e6b6 653 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 654 return;
655
77fdaa12
JB		 656 mutex_lock(&ifmgd->mtx);
657 if (!ifmgd->associated)
658 goto out;
cc32abd4
JB		 659
660 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 661 if (!sdata->local->ops->channel_switch) {
662 /* call "hw_config" only if doing sw channel switch */
663 ieee80211_hw_config(sdata->local,
664 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 665 } else {
666 /* update the device channel directly */
667 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 668 }
77fdaa12 669
cc32abd4 670 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 671 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 672
57eebdf3 673 /* XXX: wait for a beacon first? */
cc32abd4
JB		 674 ieee80211_wake_queues_by_reason(&sdata->local->hw,
675 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 676 out:
677 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
678 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 679}
680
5ce6e438
JB		 681void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
682{
683 struct ieee80211_sub_if_data *sdata;
684 struct ieee80211_if_managed *ifmgd;
685
686 sdata = vif_to_sdata(vif);
687 ifmgd = &sdata->u.mgd;
688
689 trace_api_chswitch_done(sdata, success);
690 if (!success) {
882a7c69
JB		 691 sdata_info(sdata,
692 "driver channel switch failed, disconnecting\n");
693 ieee80211_queue_work(&sdata->local->hw,
694 &ifmgd->csa_connection_drop_work);
695 } else {
696 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 697 }
5ce6e438
JB		 698}
699EXPORT_SYMBOL(ieee80211_chswitch_done);
700
cc32abd4
JB		 701static void ieee80211_chswitch_timer(unsigned long data)
702{
703 struct ieee80211_sub_if_data *sdata =
704 (struct ieee80211_sub_if_data *) data;
705 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
706
5bb644a0
JB		 707 if (sdata->local->quiescing) {
708 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
709 return;
710 }
711
42935eca 712 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 713}
714
715void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
716 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 717 struct ieee80211_bss *bss,
718 u64 timestamp)
cc32abd4 719{
0c1ad2ca
JB		 720 struct cfg80211_bss *cbss =
721 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 722 struct ieee80211_channel *new_ch;
723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 724 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
725 cbss->channel->band);
cc32abd4 726
77fdaa12
JB		 727 ASSERT_MGD_MTX(ifmgd);
728
729 if (!ifmgd->associated)
cc32abd4
JB		 730 return;
731
fbe9c429 732 if (sdata->local->scanning)
cc32abd4
JB		 733 return;
734
735 /* Disregard subsequent beacons if we are already running a timer
736 processing a CSA */
737
738 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
739 return;
740
741 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 742 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
743 sdata_info(sdata,
744 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
745 ifmgd->associated->bssid, new_freq);
746 ieee80211_queue_work(&sdata->local->hw,
747 &ifmgd->csa_connection_drop_work);
cc32abd4 748 return;
882a7c69 749 }
cc32abd4
JB		 750
751 sdata->local->csa_channel = new_ch;
752
57eebdf3
JB		 753 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
754
755 if (sw_elem->mode)
756 ieee80211_stop_queues_by_reason(&sdata->local->hw,
757 IEEE80211_QUEUE_STOP_REASON_CSA);
758
5ce6e438
JB		 759 if (sdata->local->ops->channel_switch) {
760 /* use driver's channel switch callback */
57eebdf3
JB		 761 struct ieee80211_channel_switch ch_switch = {
762 .timestamp = timestamp,
763 .block_tx = sw_elem->mode,
764 .channel = new_ch,
765 .count = sw_elem->count,
766 };
767
5ce6e438
JB		 768 drv_channel_switch(sdata->local, &ch_switch);
769 return;
770 }
771
772 /* channel switch handled in software */
57eebdf3 773 if (sw_elem->count <= 1)
42935eca 774 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 775 else
cc32abd4 776 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 777 TU_TO_EXP_TIME(sw_elem->count *
778 cbss->beacon_interval));
cc32abd4
JB		 779}
780
781static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
04b7b2ff
JB		 782 struct ieee80211_channel *channel,
783 const u8 *country_ie, u8 country_ie_len,
784 const u8 *pwr_constr_elem)
cc32abd4 785{
04b7b2ff
JB		 786 struct ieee80211_country_ie_triplet *triplet;
787 int chan = ieee80211_frequency_to_channel(channel->center_freq);
788 int i, chan_pwr, chan_increment, new_ap_level;
789 bool have_chan_pwr = false;
cc32abd4 790
04b7b2ff
JB		 791 /* Invalid IE */
792 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
cc32abd4
JB		 793 return;
794
04b7b2ff
JB		 795 triplet = (void *)(country_ie + 3);
796 country_ie_len -= 3;
797
798 switch (channel->band) {
799 default:
800 WARN_ON_ONCE(1);
801 /* fall through */
802 case IEEE80211_BAND_2GHZ:
803 case IEEE80211_BAND_60GHZ:
804 chan_increment = 1;
805 break;
806 case IEEE80211_BAND_5GHZ:
807 chan_increment = 4;
808 break;
cc32abd4 809 }
04b7b2ff
JB		 810
811 /* find channel */
812 while (country_ie_len >= 3) {
813 u8 first_channel = triplet->chans.first_channel;
814
815 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
816 goto next;
817
818 for (i = 0; i < triplet->chans.num_channels; i++) {
819 if (first_channel + i * chan_increment == chan) {
820 have_chan_pwr = true;
821 chan_pwr = triplet->chans.max_power;
822 break;
823 }
824 }
825 if (have_chan_pwr)
826 break;
827
828 next:
829 triplet++;
830 country_ie_len -= 3;
831 }
832
833 if (!have_chan_pwr)
834 return;
835
836 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
837
838 if (sdata->local->ap_power_level == new_ap_level)
839 return;
840
841 sdata_info(sdata,
842 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
843 new_ap_level, chan_pwr, *pwr_constr_elem,
844 sdata->u.mgd.bssid);
845 sdata->local->ap_power_level = new_ap_level;
846 ieee80211_hw_config(sdata->local, 0);
cc32abd4
JB		 847}
848
f90754c1
JO		 849void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
850{
851 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
852 struct ieee80211_local *local = sdata->local;
853 struct ieee80211_conf *conf = &local->hw.conf;
854
855 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
856 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
857 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
858
859 local->disable_dynamic_ps = false;
860 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
861}
862EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
863
864void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
865{
866 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
867 struct ieee80211_local *local = sdata->local;
868 struct ieee80211_conf *conf = &local->hw.conf;
869
870 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
871 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
872 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
873
874 local->disable_dynamic_ps = true;
875 conf->dynamic_ps_timeout = 0;
876 del_timer_sync(&local->dynamic_ps_timer);
877 ieee80211_queue_work(&local->hw,
878 &local->dynamic_ps_enable_work);
879}
880EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
881
965bedad
JB		 882/* powersave */
883static void ieee80211_enable_ps(struct ieee80211_local *local,
884 struct ieee80211_sub_if_data *sdata)
885{
886 struct ieee80211_conf *conf = &local->hw.conf;
887
d5edaedc
JB		 888 /*
889 * If we are scanning right now then the parameters will
890 * take effect when scan finishes.
891 */
fbe9c429 892 if (local->scanning)
d5edaedc
JB		 893 return;
894
965bedad
JB		 895 if (conf->dynamic_ps_timeout > 0 &&
896 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
897 mod_timer(&local->dynamic_ps_timer, jiffies +
898 msecs_to_jiffies(conf->dynamic_ps_timeout));
899 } else {
900 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
901 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 902
2a13052f
JO		 903 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
904 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
905 return;
906
907 conf->flags |= IEEE80211_CONF_PS;
908 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 909 }
910}
911
912static void ieee80211_change_ps(struct ieee80211_local *local)
913{
914 struct ieee80211_conf *conf = &local->hw.conf;
915
916 if (local->ps_sdata) {
965bedad
JB		 917 ieee80211_enable_ps(local, local->ps_sdata);
918 } else if (conf->flags & IEEE80211_CONF_PS) {
919 conf->flags &= ~IEEE80211_CONF_PS;
920 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
921 del_timer_sync(&local->dynamic_ps_timer);
922 cancel_work_sync(&local->dynamic_ps_enable_work);
923 }
924}
925
808118cb
JY		 926static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
927{
928 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
929 struct sta_info *sta = NULL;
c2c98fde 930 bool authorized = false;
808118cb
JY		 931
932 if (!mgd->powersave)
933 return false;
934
05cb9108
JB		 935 if (mgd->broken_ap)
936 return false;
937
808118cb
JY		 938 if (!mgd->associated)
939 return false;
940
808118cb
JY		 941 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
942 IEEE80211_STA_CONNECTION_POLL))
943 return false;
944
945 rcu_read_lock();
946 sta = sta_info_get(sdata, mgd->bssid);
947 if (sta)
c2c98fde 948 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 949 rcu_read_unlock();
950
c2c98fde 951 return authorized;
808118cb
JY		 952}
953
965bedad 954/* need to hold RTNL or interface lock */
10f644a4 955void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 956{
957 struct ieee80211_sub_if_data *sdata, *found = NULL;
958 int count = 0;
195e294d 959 int timeout;
965bedad
JB		 960
961 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
962 local->ps_sdata = NULL;
963 return;
964 }
965
966 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 967 if (!ieee80211_sdata_running(sdata))
965bedad 968 continue;
8c7914de
RM		 969 if (sdata->vif.type == NL80211_IFTYPE_AP) {
970 /* If an AP vif is found, then disable PS
971 * by setting the count to zero thereby setting
972 * ps_sdata to NULL.
973 */
974 count = 0;
975 break;
976 }
965bedad
JB		 977 if (sdata->vif.type != NL80211_IFTYPE_STATION)
978 continue;
979 found = sdata;
980 count++;
981 }
982
808118cb 983 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 984 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 985 s32 beaconint_us;
986
987 if (latency < 0)
ed77134b 988 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 989
990 beaconint_us = ieee80211_tu_to_usec(
991 found->vif.bss_conf.beacon_int);
992
ff616381 993 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 994 if (timeout < 0) {
995 /*
ff616381
JO		 996 * Go to full PSM if the user configures a very low
997 * latency requirement.
0ab82b04
EP		 998 * The 2000 second value is there for compatibility
999 * until the PM_QOS_NETWORK_LATENCY is configured
1000 * with real values.
195e294d 1001 */
0ab82b04
EP		 1002 if (latency > (1900 * USEC_PER_MSEC) &&
1003 latency != (2000 * USEC_PER_SEC))
195e294d 1004 timeout = 0;
ff616381
JO		 1005 else
1006 timeout = 100;
195e294d 1007 }
f90754c1
JO		 1008 local->dynamic_ps_user_timeout = timeout;
1009 if (!local->disable_dynamic_ps)
1010 conf->dynamic_ps_timeout =
1011 local->dynamic_ps_user_timeout;
195e294d 1012
04fe2037 1013 if (beaconint_us > latency) {
10f644a4 1014 local->ps_sdata = NULL;
04fe2037 1015 } else {
56007a02 1016 struct ieee80211_bss *bss;
04fe2037 1017 int maxslp = 1;
56007a02 1018 u8 dtimper;
04fe2037 1019
56007a02
JB		 1020 bss = (void *)found->u.mgd.associated->priv;
1021 dtimper = bss->dtim_period;
1022
1023 /* If the TIM IE is invalid, pretend the value is 1 */
1024 if (!dtimper)
1025 dtimper = 1;
1026 else if (dtimper > 1)
04fe2037
JB		 1027 maxslp = min_t(int, dtimper,
1028 latency / beaconint_us);
1029
9ccebe61 1030 local->hw.conf.max_sleep_period = maxslp;
56007a02 1031 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1032 local->ps_sdata = found;
04fe2037 1033 }
10f644a4 1034 } else {
965bedad 1035 local->ps_sdata = NULL;
10f644a4 1036 }
965bedad
JB		 1037
1038 ieee80211_change_ps(local);
1039}
1040
ab095877
EP		 1041void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1042{
1043 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1044
1045 if (sdata->vif.bss_conf.ps != ps_allowed) {
1046 sdata->vif.bss_conf.ps = ps_allowed;
1047 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1048 }
1049}
1050
965bedad
JB		 1051void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1052{
1053 struct ieee80211_local *local =
1054 container_of(work, struct ieee80211_local,
1055 dynamic_ps_disable_work);
1056
1057 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1058 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1059 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1060 }
1061
1062 ieee80211_wake_queues_by_reason(&local->hw,
1063 IEEE80211_QUEUE_STOP_REASON_PS);
1064}
1065
1066void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1067{
1068 struct ieee80211_local *local =
1069 container_of(work, struct ieee80211_local,
1070 dynamic_ps_enable_work);
1071 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1072 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1073 unsigned long flags;
1074 int q;
965bedad
JB		 1075
1076 /* can only happen when PS was just disabled anyway */
1077 if (!sdata)
1078 return;
1079
5e34069c
CL		 1080 ifmgd = &sdata->u.mgd;
1081
965bedad
JB		 1082 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1083 return;
1084
77b7023a
AN		 1085 if (!local->disable_dynamic_ps &&
1086 local->hw.conf.dynamic_ps_timeout > 0) {
1087 /* don't enter PS if TX frames are pending */
1088 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1089 mod_timer(&local->dynamic_ps_timer, jiffies +
1090 msecs_to_jiffies(
1091 local->hw.conf.dynamic_ps_timeout));
1092 return;
1093 }
77b7023a
AN		 1094
1095 /*
1096 * transmission can be stopped by others which leads to
1097 * dynamic_ps_timer expiry. Postpone the ps timer if it
1098 * is not the actual idle state.
1099 */
1100 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1101 for (q = 0; q < local->hw.queues; q++) {
1102 if (local->queue_stop_reasons[q]) {
1103 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1104 flags);
1105 mod_timer(&local->dynamic_ps_timer, jiffies +
1106 msecs_to_jiffies(
1107 local->hw.conf.dynamic_ps_timeout));
1108 return;
1109 }
1110 }
1111 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1112 }
1ddc2867 1113
375177bf 1114 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1115 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1116 netif_tx_stop_all_queues(sdata->dev);
965bedad 1117
e8306f98
VN		 1118 if (drv_tx_frames_pending(local))
1119 mod_timer(&local->dynamic_ps_timer, jiffies +
1120 msecs_to_jiffies(
1121 local->hw.conf.dynamic_ps_timeout));
1122 else {
1123 ieee80211_send_nullfunc(local, sdata, 1);
1124 /* Flush to get the tx status of nullfunc frame */
1125 drv_flush(local, false);
1126 }
f3e85b9e
VN		 1127 }
1128
2a13052f
JO		 1129 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1130 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1131 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1132 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1133 local->hw.conf.flags |= IEEE80211_CONF_PS;
1134 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1135 }
f3e85b9e 1136
77b7023a
AN		 1137 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1138 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1139}
1140
1141void ieee80211_dynamic_ps_timer(unsigned long data)
1142{
1143 struct ieee80211_local *local = (void *) data;
1144
78f1a8b7 1145 if (local->quiescing || local->suspended)
5bb644a0
JB		 1146 return;
1147
42935eca 1148 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1149}
1150
60f8b39c 1151/* MLME */
7d25745d 1152static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1153 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1154 u8 *wmm_param, size_t wmm_param_len)
1155{
f0706e82 1156 struct ieee80211_tx_queue_params params;
4ced3f74 1157 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1158 size_t left;
1159 int count;
ab13315a 1160 u8 *pos, uapsd_queues = 0;
f0706e82 1161
e1b3ec1a 1162 if (!local->ops->conf_tx)
7d25745d 1163 return false;
e1b3ec1a 1164
32c5057b 1165 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1166 return false;
3434fbd3
JB		 1167
1168 if (!wmm_param)
7d25745d 1169 return false;
3434fbd3 1170
f0706e82 1171 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1172 return false;
ab13315a
KV		 1173
1174 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1175 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1176
f0706e82 1177 count = wmm_param[6] & 0x0f;
46900298 1178 if (count == ifmgd->wmm_last_param_set)
7d25745d 1179 return false;
46900298 1180 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1181
1182 pos = wmm_param + 8;
1183 left = wmm_param_len - 8;
1184
1185 memset(&params, 0, sizeof(params));
1186
00e96dec 1187 sdata->wmm_acm = 0;
f0706e82
JB		 1188 for (; left >= 4; left -= 4, pos += 4) {
1189 int aci = (pos[0] >> 5) & 0x03;
1190 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1191 bool uapsd = false;
f0706e82
JB		 1192 int queue;
1193
1194 switch (aci) {
0eeb59fe 1195 case 1: /* AC_BK */
e100bb64 1196 queue = 3;
988c0f72 1197 if (acm)
00e96dec 1198 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1199 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1200 uapsd = true;
f0706e82 1201 break;
0eeb59fe 1202 case 2: /* AC_VI */
e100bb64 1203 queue = 1;
988c0f72 1204 if (acm)
00e96dec 1205 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1206 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1207 uapsd = true;
f0706e82 1208 break;
0eeb59fe 1209 case 3: /* AC_VO */
e100bb64 1210 queue = 0;
988c0f72 1211 if (acm)
00e96dec 1212 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1213 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1214 uapsd = true;
f0706e82 1215 break;
0eeb59fe 1216 case 0: /* AC_BE */
f0706e82 1217 default:
e100bb64 1218 queue = 2;
988c0f72 1219 if (acm)
00e96dec 1220 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1221 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1222 uapsd = true;
f0706e82
JB		 1223 break;
1224 }
1225
1226 params.aifs = pos[0] & 0x0f;
1227 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1228 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1229 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1230 params.uapsd = uapsd;
1231
bdcbd8e0
JB		 1232 mlme_dbg(sdata,
1233 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1234 queue, aci, acm,
1235 params.aifs, params.cw_min, params.cw_max,
1236 params.txop, params.uapsd);
f6f3def3
EP		 1237 sdata->tx_conf[queue] = params;
1238 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1239 sdata_err(sdata,
1240 "failed to set TX queue parameters for queue %d\n",
1241 queue);
f0706e82 1242 }
e1b3ec1a
SG		 1243
1244 /* enable WMM or activate new settings */
4ced3f74 1245 sdata->vif.bss_conf.qos = true;
7d25745d 1246 return true;
f0706e82
JB		 1247}
1248
925e64c3
SG		 1249static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1250{
1251 lockdep_assert_held(&sdata->local->mtx);
1252
1253 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1254 IEEE80211_STA_BEACON_POLL);
1255 ieee80211_run_deferred_scan(sdata->local);
1256}
1257
1258static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1259{
1260 mutex_lock(&sdata->local->mtx);
1261 __ieee80211_stop_poll(sdata);
1262 mutex_unlock(&sdata->local->mtx);
1263}
1264
7a5158ef
JB		 1265static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1266 u16 capab, bool erp_valid, u8 erp)
5628221c 1267{
bda3933a 1268 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1269 u32 changed = 0;
7a5158ef
JB		 1270 bool use_protection;
1271 bool use_short_preamble;
1272 bool use_short_slot;
1273
1274 if (erp_valid) {
1275 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1276 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1277 } else {
1278 use_protection = false;
1279 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1280 }
1281
1282 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
568d6e28 1283 if (sdata->local->oper_channel->band == IEEE80211_BAND_5GHZ)
43d35343 1284 use_short_slot = true;
5628221c 1285
471b3efd 1286 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1287 bss_conf->use_cts_prot = use_protection;
1288 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1289 }
7e9ed188 1290
d43c7b37 1291 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1292 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1293 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1294 }
d9430a32 1295
7a5158ef 1296 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1297 bss_conf->use_short_slot = use_short_slot;
1298 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1299 }
1300
1301 return changed;
1302}
1303
f698d856 1304static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1305 struct cfg80211_bss *cbss,
ae5eb026 1306 u32 bss_info_changed)
f0706e82 1307{
0c1ad2ca 1308 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1309 struct ieee80211_local *local = sdata->local;
68542962 1310 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1311
ae5eb026 1312 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1313 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1314 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1315
7ccc8bd7
FF		 1316 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1317 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1318
0c1ad2ca
JB		 1319 sdata->u.mgd.associated = cbss;
1320 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1321
17e4ec14
JM		 1322 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1323
b291ba11 1324 /* just to be sure */
925e64c3 1325 ieee80211_stop_poll(sdata);
b291ba11 1326
9ac19a90 1327 ieee80211_led_assoc(local, 1);
9306102e 1328
e5b900d2
JB		 1329 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1330 bss_conf->dtim_period = bss->dtim_period;
1331 else
1332 bss_conf->dtim_period = 0;
1333
68542962 1334 bss_conf->assoc = 1;
9cef8737 1335
a97c13c3 1336 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1337 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1338 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1339 bss_info_changed |= BSS_CHANGED_CQM;
1340
68542962
JO		 1341 /* Enable ARP filtering */
1342 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1343 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1344 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1345 }
1346
ae5eb026 1347 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1348
056508dc
JB		 1349 mutex_lock(&local->iflist_mtx);
1350 ieee80211_recalc_ps(local, -1);
1351 mutex_unlock(&local->iflist_mtx);
e0cb686f 1352
5d8e4237 1353 ieee80211_recalc_smps(local);
ab095877
EP		 1354 ieee80211_recalc_ps_vif(sdata);
1355
8a5b33f5 1356 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1357 netif_carrier_on(sdata->dev);
f0706e82
JB		 1358}
1359
e69e95db 1360static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1361 u16 stype, u16 reason, bool tx,
1362 u8 *frame_buf)
aa458d17 1363{
46900298 1364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1365 struct ieee80211_local *local = sdata->local;
1366 struct sta_info *sta;
3cc5240b 1367 u32 changed = 0;
aa458d17 1368
77fdaa12
JB		 1369 ASSERT_MGD_MTX(ifmgd);
1370
37ad3888
JB		 1371 if (WARN_ON_ONCE(tx && !frame_buf))
1372 return;
1373
b291ba11
JB		 1374 if (WARN_ON(!ifmgd->associated))
1375 return;
1376
79543d8e
DS		 1377 ieee80211_stop_poll(sdata);
1378
77fdaa12 1379 ifmgd->associated = NULL;
77fdaa12
JB		 1380
1381 /*
1382 * we need to commit the associated = NULL change because the
1383 * scan code uses that to determine whether this iface should
1384 * go to/wake up from powersave or not -- and could otherwise
1385 * wake the queues erroneously.
1386 */
1387 smp_mb();
1388
1389 /*
1390 * Thus, we can only afterwards stop the queues -- to account
1391 * for the case where another CPU is finishing a scan at this
1392 * time -- we don't want the scan code to enable queues.
1393 */
aa458d17 1394
8a5b33f5 1395 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1396 netif_carrier_off(sdata->dev);
1397
2a419056 1398 mutex_lock(&local->sta_mtx);
88a9e31c 1399 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1400 if (sta) {
c2c98fde 1401 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
7f161146 1402 ieee80211_sta_tear_down_BA_sessions(sta, false);
4cad6c7c 1403 }
2a419056 1404 mutex_unlock(&local->sta_mtx);
aa458d17 1405
88bc40e8
EP		 1406 /*
1407 * if we want to get out of ps before disassoc (why?) we have
1408 * to do it before sending disassoc, as otherwise the null-packet
1409 * won't be valid.
1410 */
1411 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1412 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1413 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1414 }
1415 local->ps_sdata = NULL;
1416
ab095877
EP		 1417 /* disable per-vif ps */
1418 ieee80211_recalc_ps_vif(sdata);
1419
f823981e
EP		 1420 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1421 if (tx)
1422 drv_flush(local, false);
1423
37ad3888
JB		 1424 /* deauthenticate/disassociate now */
1425 if (tx || frame_buf)
88a9e31c
EP		 1426 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1427 reason, tx, frame_buf);
37ad3888
JB		 1428
1429 /* flush out frame */
1430 if (tx)
1431 drv_flush(local, false);
1432
88a9e31c
EP		 1433 /* clear bssid only after building the needed mgmt frames */
1434 memset(ifmgd->bssid, 0, ETH_ALEN);
1435
37ad3888
JB		 1436 /* remove AP and TDLS peers */
1437 sta_info_flush(local, sdata);
1438
1439 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1440 changed |= ieee80211_reset_erp_info(sdata);
1441
f5e5bf25 1442 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1443 changed |= BSS_CHANGED_ASSOC;
1444 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1445
413ad50a 1446 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1447 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1448 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1449
04b7b2ff 1450 local->ap_power_level = 0;
a8302de9 1451
520eb820
KV		 1452 del_timer_sync(&local->dynamic_ps_timer);
1453 cancel_work_sync(&local->dynamic_ps_enable_work);
1454
68542962
JO		 1455 /* Disable ARP filtering */
1456 if (sdata->vif.bss_conf.arp_filter_enabled) {
1457 sdata->vif.bss_conf.arp_filter_enabled = false;
1458 changed |= BSS_CHANGED_ARP_FILTER;
1459 }
1460
3abead59
JB		 1461 sdata->vif.bss_conf.qos = false;
1462 changed |= BSS_CHANGED_QOS;
1463
0aaffa9b
JB		 1464 /* The BSSID (not really interesting) and HT changed */
1465 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1466 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1467
3cc5240b
JB		 1468 /* channel(_type) changes are handled by ieee80211_hw_config */
1469 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1470 ieee80211_hw_config(local, 0);
1471
3abead59
JB		 1472 /* disassociated - set to defaults now */
1473 ieee80211_set_wmm_default(sdata, false);
1474
b9dcf712
JB		 1475 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1476 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1477 del_timer_sync(&sdata->u.mgd.timer);
1478 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1479
1480 sdata->u.mgd.timers_running = 0;
aa458d17 1481}
f0706e82 1482
3cf335d5
KV		 1483void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1484 struct ieee80211_hdr *hdr)
1485{
1486 /*
1487 * We can postpone the mgd.timer whenever receiving unicast frames
1488 * from AP because we know that the connection is working both ways
1489 * at that time. But multicast frames (and hence also beacons) must
1490 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1491 * data idle periods for sending the periodic probe request to the
1492 * AP we're connected to.
3cf335d5 1493 */
b291ba11
JB		 1494 if (is_multicast_ether_addr(hdr->addr1))
1495 return;
1496
be099e82 1497 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1498}
f0706e82 1499
4e5ff376
FF		 1500static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1501{
1502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1503 struct ieee80211_local *local = sdata->local;
4e5ff376 1504
133d40f9 1505 mutex_lock(&local->mtx);
4e5ff376 1506 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1507 IEEE80211_STA_CONNECTION_POLL))) {
1508 mutex_unlock(&local->mtx);
1509 return;
1510 }
4e5ff376 1511
925e64c3 1512 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1513
1514 mutex_lock(&local->iflist_mtx);
1515 ieee80211_recalc_ps(local, -1);
1516 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1517
1518 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1519 goto out;
4e5ff376
FF		 1520
1521 /*
1522 * We've received a probe response, but are not sure whether
1523 * we have or will be receiving any beacons or data, so let's
1524 * schedule the timers again, just in case.
1525 */
1526 ieee80211_sta_reset_beacon_monitor(sdata);
1527
1528 mod_timer(&ifmgd->conn_mon_timer,
1529 round_jiffies_up(jiffies +
1530 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1531out:
133d40f9 1532 mutex_unlock(&local->mtx);
4e5ff376
FF		 1533}
1534
1535void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1536 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1537{
75706d0e 1538 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1539 return;
1540
04ac3c0e
FF		 1541 if (ack)
1542 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1543
1544 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1545 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1546 if (ack)
1547 sdata->u.mgd.probe_send_count = 0;
1548 else
1549 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1550 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1551 }
1552}
1553
a43abf29
ML		 1554static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1555{
1556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1557 const u8 *ssid;
f01a067d 1558 u8 *dst = ifmgd->associated->bssid;
180205bd 1559 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1560
1561 /*
1562 * Try sending broadcast probe requests for the last three
1563 * probe requests after the first ones failed since some
1564 * buggy APs only support broadcast probe requests.
1565 */
1566 if (ifmgd->probe_send_count >= unicast_limit)
1567 dst = NULL;
a43abf29 1568
4e5ff376
FF		 1569 /*
1570 * When the hardware reports an accurate Tx ACK status, it's
1571 * better to send a nullfunc frame instead of a probe request,
1572 * as it will kick us off the AP quickly if we aren't associated
1573 * anymore. The timeout will be reset if the frame is ACKed by
1574 * the AP.
1575 */
992e68bf
SD		 1576 ifmgd->probe_send_count++;
1577
04ac3c0e
FF		 1578 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1579 ifmgd->nullfunc_failed = false;
4e5ff376 1580 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1581 } else {
88c868c4
SG		 1582 int ssid_len;
1583
4e5ff376 1584 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1585 if (WARN_ON_ONCE(ssid == NULL))
1586 ssid_len = 0;
1587 else
1588 ssid_len = ssid[1];
1589
1590 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
fe94fe05
JB		 1591 0, (u32) -1, true, false,
1592 ifmgd->associated->channel);
4e5ff376 1593 }
a43abf29 1594
180205bd 1595 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1596 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1597 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1598 drv_flush(sdata->local, false);
a43abf29
ML		 1599}
1600
b291ba11
JB		 1601static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1602 bool beacon)
04de8381 1603{
04de8381 1604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1605 bool already = false;
34bfc411 1606
9607e6b6 1607 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1608 return;
1609
77fdaa12
JB		 1610 mutex_lock(&ifmgd->mtx);
1611
1612 if (!ifmgd->associated)
1613 goto out;
1614
133d40f9
SG		 1615 mutex_lock(&sdata->local->mtx);
1616
1617 if (sdata->local->tmp_channel || sdata->local->scanning) {
1618 mutex_unlock(&sdata->local->mtx);
1619 goto out;
1620 }
1621
e87cc472 1622 if (beacon)
bdcbd8e0
JB		 1623 mlme_dbg_ratelimited(sdata,
1624 "detected beacon loss from AP - sending probe request\n");
1625
6efb71b0
HS		 1626 ieee80211_cqm_rssi_notify(&sdata->vif,
1627 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1628
b291ba11
JB		 1629 /*
1630 * The driver/our work has already reported this event or the
1631 * connection monitoring has kicked in and we have already sent
1632 * a probe request. Or maybe the AP died and the driver keeps
1633 * reporting until we disassociate...
1634 *
1635 * In either case we have to ignore the current call to this
1636 * function (except for setting the correct probe reason bit)
1637 * because otherwise we would reset the timer every time and
1638 * never check whether we received a probe response!
1639 */
1640 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1641 IEEE80211_STA_CONNECTION_POLL))
1642 already = true;
1643
1644 if (beacon)
1645 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1646 else
1647 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1648
133d40f9
SG		 1649 mutex_unlock(&sdata->local->mtx);
1650
b291ba11
JB		 1651 if (already)
1652 goto out;
1653
4e751843
JB		 1654 mutex_lock(&sdata->local->iflist_mtx);
1655 ieee80211_recalc_ps(sdata->local, -1);
1656 mutex_unlock(&sdata->local->iflist_mtx);
1657
a43abf29
ML		 1658 ifmgd->probe_send_count = 0;
1659 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1660 out:
1661 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1662}
1663
a619a4c0
JO		 1664struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1665 struct ieee80211_vif *vif)
1666{
1667 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1669 struct cfg80211_bss *cbss;
a619a4c0
JO		 1670 struct sk_buff *skb;
1671 const u8 *ssid;
88c868c4 1672 int ssid_len;
a619a4c0
JO		 1673
1674 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1675 return NULL;
1676
1677 ASSERT_MGD_MTX(ifmgd);
1678
d9b3b28b
EP		 1679 if (ifmgd->associated)
1680 cbss = ifmgd->associated;
1681 else if (ifmgd->auth_data)
1682 cbss = ifmgd->auth_data->bss;
1683 else if (ifmgd->assoc_data)
1684 cbss = ifmgd->assoc_data->bss;
1685 else
a619a4c0
JO		 1686 return NULL;
1687
d9b3b28b 1688 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1689 if (WARN_ON_ONCE(ssid == NULL))
1690 ssid_len = 0;
1691 else
1692 ssid_len = ssid[1];
1693
d9b3b28b 1694 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
6b77863b
JB		 1695 (u32) -1,
1696 sdata->local->oper_channel,
1697 ssid + 2, ssid_len,
85a237fe 1698 NULL, 0, true);
a619a4c0
JO		 1699
1700 return skb;
1701}
1702EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1703
882a7c69
JB		 1704static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1705 bool transmit_frame)
1e4dcd01
JO		 1706{
1707 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1708 struct ieee80211_local *local = sdata->local;
6ae16775 1709 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1710
1711 mutex_lock(&ifmgd->mtx);
1712 if (!ifmgd->associated) {
1713 mutex_unlock(&ifmgd->mtx);
1714 return;
1715 }
1716
37ad3888
JB		 1717 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1718 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
882a7c69
JB		 1719 transmit_frame, frame_buf);
1720 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1721 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1722
1e4dcd01
JO		 1723 /*
1724 * must be outside lock due to cfg80211,
1725 * but that's not a problem.
1726 */
6ae16775 1727 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 1728
1729 mutex_lock(&local->mtx);
1730 ieee80211_recalc_idle(local);
1731 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1732}
1733
cc74c0c7 1734static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1735{
1736 struct ieee80211_sub_if_data *sdata =
1737 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1738 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1740 struct sta_info *sta;
1741
1742 if (ifmgd->associated) {
30fa9047 1743 rcu_read_lock();
a85e1d55
PS		 1744 sta = sta_info_get(sdata, ifmgd->bssid);
1745 if (sta)
1746 sta->beacon_loss_count++;
30fa9047 1747 rcu_read_unlock();
a85e1d55 1748 }
b291ba11 1749
882a7c69
JB		 1750 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1751 sdata_info(sdata, "Connection to AP %pM lost\n",
1752 ifmgd->bssid);
1753 __ieee80211_disconnect(sdata, false);
1754 } else {
1e4dcd01 1755 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1756 }
1757}
1758
1759static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1760{
1761 struct ieee80211_sub_if_data *sdata =
1762 container_of(work, struct ieee80211_sub_if_data,
1763 u.mgd.csa_connection_drop_work);
1764
1765 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1766 IEEE80211_QUEUE_STOP_REASON_CSA);
1767 __ieee80211_disconnect(sdata, true);
b291ba11
JB		 1768}
1769
04de8381
KV		 1770void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1771{
1772 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1773 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1774
b5878a2d
JB		 1775 trace_api_beacon_loss(sdata);
1776
1e4dcd01
JO		 1777 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1778 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1779}
1780EXPORT_SYMBOL(ieee80211_beacon_loss);
1781
1e4dcd01
JO		 1782void ieee80211_connection_loss(struct ieee80211_vif *vif)
1783{
1784 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1785 struct ieee80211_hw *hw = &sdata->local->hw;
1786
b5878a2d
JB		 1787 trace_api_connection_loss(sdata);
1788
1e4dcd01
JO		 1789 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1790 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1791}
1792EXPORT_SYMBOL(ieee80211_connection_loss);
1793
1794
66e67e41
JB		 1795static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1796 bool assoc)
1797{
1798 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1799
1800 lockdep_assert_held(&sdata->u.mgd.mtx);
1801
66e67e41
JB		 1802 if (!assoc) {
1803 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1804
1805 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1806 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1807 }
1808
1809 cfg80211_put_bss(auth_data->bss);
1810 kfree(auth_data);
1811 sdata->u.mgd.auth_data = NULL;
1812}
1813
1814static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1815 struct ieee80211_mgmt *mgmt, size_t len)
1816{
1817 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1818 u8 *pos;
1819 struct ieee802_11_elems elems;
1820
1821 pos = mgmt->u.auth.variable;
1822 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1823 if (!elems.challenge)
1824 return;
1825 auth_data->expected_transaction = 4;
a1845fc7 1826 drv_mgd_prepare_tx(sdata->local, sdata);
66e67e41
JB		 1827 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1828 elems.challenge - 2, elems.challenge_len + 2,
1829 auth_data->bss->bssid, auth_data->bss->bssid,
1830 auth_data->key, auth_data->key_len,
1831 auth_data->key_idx);
1832}
1833
1834static enum rx_mgmt_action __must_check
1835ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1836 struct ieee80211_mgmt *mgmt, size_t len)
1837{
1838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1839 u8 bssid[ETH_ALEN];
1840 u16 auth_alg, auth_transaction, status_code;
1841 struct sta_info *sta;
1842
1843 lockdep_assert_held(&ifmgd->mtx);
1844
1845 if (len < 24 + 6)
1846 return RX_MGMT_NONE;
1847
1848 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1849 return RX_MGMT_NONE;
1850
1851 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1852
b203ca39 1853 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1854 return RX_MGMT_NONE;
1855
1856 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1857 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1858 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1859
1860 if (auth_alg != ifmgd->auth_data->algorithm ||
1861 auth_transaction != ifmgd->auth_data->expected_transaction)
1862 return RX_MGMT_NONE;
1863
1864 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1865 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1866 mgmt->sa, status_code);
dac211ec
EP		 1867 ieee80211_destroy_auth_data(sdata, false);
1868 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1869 }
1870
1871 switch (ifmgd->auth_data->algorithm) {
1872 case WLAN_AUTH_OPEN:
1873 case WLAN_AUTH_LEAP:
1874 case WLAN_AUTH_FT:
1875 break;
1876 case WLAN_AUTH_SHARED_KEY:
1877 if (ifmgd->auth_data->expected_transaction != 4) {
1878 ieee80211_auth_challenge(sdata, mgmt, len);
1879 /* need another frame */
1880 return RX_MGMT_NONE;
1881 }
1882 break;
1883 default:
1884 WARN_ONCE(1, "invalid auth alg %d",
1885 ifmgd->auth_data->algorithm);
1886 return RX_MGMT_NONE;
1887 }
1888
bdcbd8e0 1889 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1890 ifmgd->auth_data->done = true;
1891 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1892 run_again(ifmgd, ifmgd->auth_data->timeout);
1893
1894 /* move station state to auth */
1895 mutex_lock(&sdata->local->sta_mtx);
1896 sta = sta_info_get(sdata, bssid);
1897 if (!sta) {
1898 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1899 goto out_err;
1900 }
1901 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1902 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1903 goto out_err;
1904 }
1905 mutex_unlock(&sdata->local->sta_mtx);
1906
1907 return RX_MGMT_CFG80211_RX_AUTH;
1908 out_err:
1909 mutex_unlock(&sdata->local->sta_mtx);
1910 /* ignore frame -- wait for timeout */
1911 return RX_MGMT_NONE;
1912}
1913
1914
77fdaa12
JB		 1915static enum rx_mgmt_action __must_check
1916ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1917 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1918{
46900298 1919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1920 const u8 *bssid = NULL;
f0706e82
JB		 1921 u16 reason_code;
1922
66e67e41
JB		 1923 lockdep_assert_held(&ifmgd->mtx);
1924
f4ea83dd 1925 if (len < 24 + 2)
77fdaa12 1926 return RX_MGMT_NONE;
f0706e82 1927
66e67e41 1928 if (!ifmgd->associated ||
b203ca39 1929 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1930 return RX_MGMT_NONE;
77fdaa12 1931
0c1ad2ca 1932 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1933
1934 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1935
bdcbd8e0
JB		 1936 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1937 bssid, reason_code);
77fdaa12 1938
37ad3888
JB		 1939 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1940
7da7cc1d 1941 mutex_lock(&sdata->local->mtx);
63f170e0 1942 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1943 mutex_unlock(&sdata->local->mtx);
f0706e82 1944
77fdaa12 1945 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1946}
1947
1948
77fdaa12
JB		 1949static enum rx_mgmt_action __must_check
1950ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1951 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1952{
46900298 1953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1954 u16 reason_code;
1955
66e67e41 1956 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1957
66e67e41 1958 if (len < 24 + 2)
77fdaa12
JB		 1959 return RX_MGMT_NONE;
1960
66e67e41 1961 if (!ifmgd->associated ||
b203ca39 1962 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1963 return RX_MGMT_NONE;
f0706e82
JB		 1964
1965 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1966
bdcbd8e0
JB		 1967 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1968 mgmt->sa, reason_code);
f0706e82 1969
37ad3888
JB		 1970 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1971
7da7cc1d 1972 mutex_lock(&sdata->local->mtx);
bc83b681 1973 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1974 mutex_unlock(&sdata->local->mtx);
37ad3888 1975
77fdaa12 1976 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1977}
1978
c74d084f
CL		 1979static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1980 u8 *supp_rates, unsigned int supp_rates_len,
1981 u32 *rates, u32 *basic_rates,
1982 bool *have_higher_than_11mbit,
1983 int *min_rate, int *min_rate_index)
1984{
1985 int i, j;
1986
1987 for (i = 0; i < supp_rates_len; i++) {
1988 int rate = (supp_rates[i] & 0x7f) * 5;
1989 bool is_basic = !!(supp_rates[i] & 0x80);
1990
1991 if (rate > 110)
1992 *have_higher_than_11mbit = true;
1993
1994 /*
1995 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1996 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1997 *
1998 * Note: Even through the membership selector and the basic
1999 * rate flag share the same bit, they are not exactly
2000 * the same.
2001 */
2002 if (!!(supp_rates[i] & 0x80) &&
2003 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2004 continue;
2005
2006 for (j = 0; j < sband->n_bitrates; j++) {
2007 if (sband->bitrates[j].bitrate == rate) {
2008 *rates |= BIT(j);
2009 if (is_basic)
2010 *basic_rates |= BIT(j);
2011 if (rate < *min_rate) {
2012 *min_rate = rate;
2013 *min_rate_index = j;
2014 }
2015 break;
2016 }
2017 }
2018 }
2019}
f0706e82 2020
66e67e41
JB		 2021static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2022 bool assoc)
2023{
2024 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2025
2026 lockdep_assert_held(&sdata->u.mgd.mtx);
2027
66e67e41
JB		 2028 if (!assoc) {
2029 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2030
2031 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2032 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2033 }
2034
2035 kfree(assoc_data);
2036 sdata->u.mgd.assoc_data = NULL;
2037}
2038
2039static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2040 struct cfg80211_bss *cbss,
af6b6374 2041 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2042{
46900298 2043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2044 struct ieee80211_local *local = sdata->local;
8318d78a 2045 struct ieee80211_supported_band *sband;
f0706e82 2046 struct sta_info *sta;
af6b6374 2047 u8 *pos;
af6b6374 2048 u16 capab_info, aid;
f0706e82 2049 struct ieee802_11_elems elems;
bda3933a 2050 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2051 u32 changed = 0;
c74d084f 2052 int err;
f0706e82 2053
af6b6374 2054 /* AssocResp and ReassocResp have identical structure */
f0706e82 2055
f0706e82 2056 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2057 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2058
1dd84aa2 2059 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2060 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2061 aid);
1dd84aa2
JB		 2062 aid &= ~(BIT(15) | BIT(14));
2063
05cb9108
JB		 2064 ifmgd->broken_ap = false;
2065
2066 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2067 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2068 aid);
05cb9108
JB		 2069 aid = 0;
2070 ifmgd->broken_ap = true;
2071 }
2072
af6b6374
JB		 2073 pos = mgmt->u.assoc_resp.variable;
2074 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2075
f0706e82 2076 if (!elems.supp_rates) {
bdcbd8e0 2077 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2078 return false;
f0706e82
JB		 2079 }
2080
46900298 2081 ifmgd->aid = aid;
f0706e82 2082
2a33bee2
GE		 2083 mutex_lock(&sdata->local->sta_mtx);
2084 /*
2085 * station info was already allocated and inserted before
2086 * the association and should be available to us
2087 */
7852e361 2088 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2089 if (WARN_ON(!sta)) {
2090 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2091 return false;
77fdaa12 2092 }
05e5e883 2093
66e67e41 2094 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2095
ab1faead 2096 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2097 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2098 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2099
64f68e5d
JB		 2100 sta->supports_40mhz =
2101 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2102
4b7679a5 2103 rate_control_rate_init(sta);
f0706e82 2104
46900298 2105 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2106 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2107
ddf4ac53 2108 if (elems.wmm_param)
c2c98fde 2109 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2110
c8987876
JB		 2111 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2112 if (!err)
2113 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2114 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2115 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2116 if (err) {
bdcbd8e0
JB		 2117 sdata_info(sdata,
2118 "failed to move station %pM to desired state\n",
2119 sta->sta.addr);
c8987876
JB		 2120 WARN_ON(__sta_info_destroy(sta));
2121 mutex_unlock(&sdata->local->sta_mtx);
2122 return false;
2123 }
2124
7852e361 2125 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2126
f2176d72
JO		 2127 /*
2128 * Always handle WMM once after association regardless
2129 * of the first value the AP uses. Setting -1 here has
2130 * that effect because the AP values is an unsigned
2131 * 4-bit value.
2132 */
2133 ifmgd->wmm_last_param_set = -1;
2134
ddf4ac53 2135 if (elems.wmm_param)
4ced3f74 2136 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2137 elems.wmm_param_len);
aa837e1d 2138 else
3abead59
JB		 2139 ieee80211_set_wmm_default(sdata, false);
2140 changed |= BSS_CHANGED_QOS;
f0706e82 2141
074d46d1 2142 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2143 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2144 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2145 cbss->bssid, false);
ae5eb026 2146
60f8b39c
JB		 2147 /* set AID and assoc capability,
2148 * ieee80211_set_associated() will tell the driver */
2149 bss_conf->aid = aid;
2150 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2151 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2152
d524215f
FF		 2153 /*
2154 * If we're using 4-addr mode, let the AP know that we're
2155 * doing so, so that it can create the STA VLAN on its side
2156 */
2157 if (ifmgd->use_4addr)
2158 ieee80211_send_4addr_nullfunc(local, sdata);
2159
15b7b062 2160 /*
b291ba11
JB		 2161 * Start timer to probe the connection to the AP now.
2162 * Also start the timer that will detect beacon loss.
15b7b062 2163 */
b291ba11 2164 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2165 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2166
af6b6374 2167 return true;
f0706e82
JB		 2168}
2169
66e67e41
JB		 2170static enum rx_mgmt_action __must_check
2171ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2172 struct ieee80211_mgmt *mgmt, size_t len,
2173 struct cfg80211_bss **bss)
2174{
2175 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2176 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2177 u16 capab_info, status_code, aid;
2178 struct ieee802_11_elems elems;
2179 u8 *pos;
2180 bool reassoc;
2181
2182 lockdep_assert_held(&ifmgd->mtx);
2183
2184 if (!assoc_data)
2185 return RX_MGMT_NONE;
b203ca39 2186 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2187 return RX_MGMT_NONE;
2188
2189 /*
2190 * AssocResp and ReassocResp have identical structure, so process both
2191 * of them in this function.
2192 */
2193
2194 if (len < 24 + 6)
2195 return RX_MGMT_NONE;
2196
2197 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2198 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2199 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2200 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2201
bdcbd8e0
JB		 2202 sdata_info(sdata,
2203 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2204 reassoc ? "Rea" : "A", mgmt->sa,
2205 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2206
2207 pos = mgmt->u.assoc_resp.variable;
2208 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2209
2210 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2211 elems.timeout_int && elems.timeout_int_len == 5 &&
2212 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2213 u32 tu, ms;
2214 tu = get_unaligned_le32(elems.timeout_int + 1);
2215 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2216 sdata_info(sdata,
2217 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2218 mgmt->sa, tu, ms);
66e67e41
JB		 2219 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2220 if (ms > IEEE80211_ASSOC_TIMEOUT)
2221 run_again(ifmgd, assoc_data->timeout);
2222 return RX_MGMT_NONE;
2223 }
2224
2225 *bss = assoc_data->bss;
2226
2227 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2228 sdata_info(sdata, "%pM denied association (code=%d)\n",
2229 mgmt->sa, status_code);
66e67e41
JB		 2230 ieee80211_destroy_assoc_data(sdata, false);
2231 } else {
66e67e41
JB		 2232 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2233 /* oops -- internal error -- send timeout for now */
10a9109f 2234 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2235 cfg80211_put_bss(*bss);
2236 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2237 }
635d999f 2238 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2239
2240 /*
2241 * destroy assoc_data afterwards, as otherwise an idle
2242 * recalc after assoc_data is NULL but before associated
2243 * is set can cause the interface to go idle
2244 */
2245 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2246 }
2247
2248 return RX_MGMT_CFG80211_RX_ASSOC;
2249}
98c8fccf
JB		 2250static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2251 struct ieee80211_mgmt *mgmt,
2252 size_t len,
2253 struct ieee80211_rx_status *rx_status,
2254 struct ieee802_11_elems *elems,
2255 bool beacon)
2256{
2257 struct ieee80211_local *local = sdata->local;
2258 int freq;
c2b13452 2259 struct ieee80211_bss *bss;
98c8fccf 2260 struct ieee80211_channel *channel;
56007a02
JB		 2261 bool need_ps = false;
2262
66e67e41 2263 if (sdata->u.mgd.associated &&
b203ca39 2264 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2265 bss = (void *)sdata->u.mgd.associated->priv;
2266 /* not previously set so we may need to recalc */
2267 need_ps = !bss->dtim_period;
2268 }
98c8fccf
JB		 2269
2270 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2271 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2272 rx_status->band);
98c8fccf
JB		 2273 else
2274 freq = rx_status->freq;
2275
2276 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2277
2278 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2279 return;
2280
98c8fccf 2281 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2282 channel, beacon);
77fdaa12
JB		 2283 if (bss)
2284 ieee80211_rx_bss_put(local, bss);
2285
2286 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2287 return;
2288
56007a02
JB		 2289 if (need_ps) {
2290 mutex_lock(&local->iflist_mtx);
2291 ieee80211_recalc_ps(local, -1);
2292 mutex_unlock(&local->iflist_mtx);
2293 }
2294
5bc1420b
JB		 2295 if (elems->ch_switch_ie &&
2296 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2297 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2298 bss, rx_status->mactime);
f0706e82
JB		 2299}
2300
2301
f698d856 2302static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2303 struct sk_buff *skb)
f0706e82 2304{
af6b6374 2305 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2306 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2307 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2308 size_t baselen, len = skb->len;
ae6a44e3
EK		 2309 struct ieee802_11_elems elems;
2310
15b7b062
KV		 2311 ifmgd = &sdata->u.mgd;
2312
77fdaa12
JB		 2313 ASSERT_MGD_MTX(ifmgd);
2314
b203ca39 2315 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2316 return; /* ignore ProbeResp to foreign address */
2317
ae6a44e3
EK		 2318 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2319 if (baselen > len)
2320 return;
2321
2322 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2323 &elems);
2324
98c8fccf 2325 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2326
77fdaa12 2327 if (ifmgd->associated &&
b203ca39 2328 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2329 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2330
2331 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2332 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2333 /* got probe response, continue with auth */
bdcbd8e0 2334 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2335 ifmgd->auth_data->tries = 0;
2336 ifmgd->auth_data->timeout = jiffies;
2337 run_again(ifmgd, ifmgd->auth_data->timeout);
2338 }
f0706e82
JB		 2339}
2340
d91f36db
JB		 2341/*
2342 * This is the canonical list of information elements we care about,
2343 * the filter code also gives us all changes to the Microsoft OUI
2344 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2345 *
2346 * We implement beacon filtering in software since that means we can
2347 * avoid processing the frame here and in cfg80211, and userspace
2348 * will not be able to tell whether the hardware supports it or not.
2349 *
2350 * XXX: This list needs to be dynamic -- userspace needs to be able to
2351 * add items it requires. It also needs to be able to tell us to
2352 * look out for other vendor IEs.
2353 */
2354static const u64 care_about_ies =
1d4df3a5
JB		 2355 (1ULL << WLAN_EID_COUNTRY) |
2356 (1ULL << WLAN_EID_ERP_INFO) |
2357 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2358 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2359 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2360 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2361
f698d856 2362static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2363 struct ieee80211_mgmt *mgmt,
2364 size_t len,
2365 struct ieee80211_rx_status *rx_status)
2366{
d91f36db 2367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2368 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2369 size_t baselen;
2370 struct ieee802_11_elems elems;
f698d856 2371 struct ieee80211_local *local = sdata->local;
471b3efd 2372 u32 changed = 0;
d91f36db 2373 bool erp_valid, directed_tim = false;
7a5158ef 2374 u8 erp_value = 0;
d91f36db 2375 u32 ncrc;
77fdaa12
JB		 2376 u8 *bssid;
2377
66e67e41 2378 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2379
ae6a44e3
EK		 2380 /* Process beacon from the current BSS */
2381 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2382 if (baselen > len)
2383 return;
2384
568d6e28 2385 if (rx_status->freq != local->oper_channel->center_freq)
f0706e82 2386 return;
f0706e82 2387
66e67e41 2388 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2389 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2390 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2391 len - baselen, &elems);
77fdaa12 2392
66e67e41
JB		 2393 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2394 false);
2395 ifmgd->assoc_data->have_beacon = true;
2396 ifmgd->assoc_data->sent_assoc = false;
2397 /* continue assoc process */
2398 ifmgd->assoc_data->timeout = jiffies;
2399 run_again(ifmgd, ifmgd->assoc_data->timeout);
2400 return;
2401 }
77fdaa12 2402
66e67e41 2403 if (!ifmgd->associated ||
b203ca39 2404 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2405 return;
66e67e41 2406 bssid = ifmgd->associated->bssid;
f0706e82 2407
17e4ec14
JM		 2408 /* Track average RSSI from the Beacon frames of the current AP */
2409 ifmgd->last_beacon_signal = rx_status->signal;
2410 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2411 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2412 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2413 ifmgd->last_cqm_event_signal = 0;
391a200a 2414 ifmgd->count_beacon_signal = 1;
615f7b9b 2415 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2416 } else {
2417 ifmgd->ave_beacon_signal =
2418 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2419 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2420 ifmgd->ave_beacon_signal) / 16;
391a200a 2421 ifmgd->count_beacon_signal++;
17e4ec14 2422 }
615f7b9b
MV		 2423
2424 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2425 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2426 int sig = ifmgd->ave_beacon_signal;
2427 int last_sig = ifmgd->last_ave_beacon_signal;
2428
2429 /*
2430 * if signal crosses either of the boundaries, invoke callback
2431 * with appropriate parameters
2432 */
2433 if (sig > ifmgd->rssi_max_thold &&
2434 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2435 ifmgd->last_ave_beacon_signal = sig;
2436 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2437 } else if (sig < ifmgd->rssi_min_thold &&
2438 (last_sig >= ifmgd->rssi_max_thold ||
2439 last_sig == 0)) {
2440 ifmgd->last_ave_beacon_signal = sig;
2441 drv_rssi_callback(local, RSSI_EVENT_LOW);
2442 }
2443 }
2444
17e4ec14 2445 if (bss_conf->cqm_rssi_thold &&
391a200a 2446 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2447 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2448 int sig = ifmgd->ave_beacon_signal / 16;
2449 int last_event = ifmgd->last_cqm_event_signal;
2450 int thold = bss_conf->cqm_rssi_thold;
2451 int hyst = bss_conf->cqm_rssi_hyst;
2452 if (sig < thold &&
2453 (last_event == 0 || sig < last_event - hyst)) {
2454 ifmgd->last_cqm_event_signal = sig;
2455 ieee80211_cqm_rssi_notify(
2456 &sdata->vif,
2457 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2458 GFP_KERNEL);
2459 } else if (sig > thold &&
2460 (last_event == 0 || sig > last_event + hyst)) {
2461 ifmgd->last_cqm_event_signal = sig;
2462 ieee80211_cqm_rssi_notify(
2463 &sdata->vif,
2464 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2465 GFP_KERNEL);
2466 }
2467 }
2468
b291ba11 2469 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2470 mlme_dbg_ratelimited(sdata,
2471 "cancelling probereq poll due to a received beacon\n");
925e64c3 2472 mutex_lock(&local->mtx);
b291ba11 2473 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2474 ieee80211_run_deferred_scan(local);
2475 mutex_unlock(&local->mtx);
2476
4e751843
JB		 2477 mutex_lock(&local->iflist_mtx);
2478 ieee80211_recalc_ps(local, -1);
2479 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2480 }
2481
b291ba11
JB		 2482 /*
2483 * Push the beacon loss detection into the future since
2484 * we are processing a beacon from the AP just now.
2485 */
d3a910a8 2486 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2487
d91f36db
JB		 2488 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2489 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2490 len - baselen, &elems,
2491 care_about_ies, ncrc);
2492
2493 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2494 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2495 ifmgd->aid);
d91f36db 2496
25c9c875 2497 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2498 if (directed_tim) {
572e0012 2499 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2500 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2501 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2502 ieee80211_hw_config(local,
2503 IEEE80211_CONF_CHANGE_PS);
2504 }
572e0012 2505 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2506 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2507 local->pspolling = true;
2508
2509 /*
2510 * Here is assumed that the driver will be
2511 * able to send ps-poll frame and receive a
2512 * response even though power save mode is
2513 * enabled, but some drivers might require
2514 * to disable power save here. This needs
2515 * to be investigated.
2516 */
2517 ieee80211_send_pspoll(local, sdata);
2518 }
a97b77b9
VN		 2519 }
2520 }
7a5158ef 2521
d8ec4433 2522 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2523 return;
2524 ifmgd->beacon_crc = ncrc;
d8ec4433 2525 ifmgd->beacon_crc_valid = true;
30196673 2526
7d25745d
JB		 2527 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2528 true);
2529
2530 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2531 elems.wmm_param_len))
2532 changed |= BSS_CHANGED_QOS;
2533
7a5158ef
JB		 2534 if (elems.erp_info && elems.erp_info_len >= 1) {
2535 erp_valid = true;
2536 erp_value = elems.erp_info[0];
2537 } else {
2538 erp_valid = false;
50c4afb9 2539 }
7a5158ef
JB		 2540 changed |= ieee80211_handle_bss_capability(sdata,
2541 le16_to_cpu(mgmt->u.beacon.capab_info),
2542 erp_valid, erp_value);
f0706e82 2543
d3c990fb 2544
074d46d1 2545 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2546 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2547 struct ieee80211_supported_band *sband;
ae5eb026 2548
568d6e28 2549 sband = local->hw.wiphy->bands[local->oper_channel->band];
ae5eb026 2550
24398e39
JB		 2551 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2552 bssid, true);
d3c990fb
RR		 2553 }
2554
04b7b2ff
JB		 2555 if (elems.country_elem && elems.pwr_constr_elem &&
2556 mgmt->u.probe_resp.capab_info &
2557 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
2558 ieee80211_handle_pwr_constr(sdata, local->oper_channel,
2559 elems.country_elem,
2560 elems.country_elem_len,
2561 elems.pwr_constr_elem);
3f2355cb 2562
471b3efd 2563 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2564}
2565
1fa57d01
JB		 2566void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2567 struct sk_buff *skb)
f0706e82 2568{
77fdaa12 2569 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2570 struct ieee80211_rx_status *rx_status;
f0706e82 2571 struct ieee80211_mgmt *mgmt;
66e67e41 2572 struct cfg80211_bss *bss = NULL;
77fdaa12 2573 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2574 u16 fc;
2575
f0706e82
JB		 2576 rx_status = (struct ieee80211_rx_status *) skb->cb;
2577 mgmt = (struct ieee80211_mgmt *) skb->data;
2578 fc = le16_to_cpu(mgmt->frame_control);
2579
77fdaa12
JB		 2580 mutex_lock(&ifmgd->mtx);
2581
66e67e41
JB		 2582 switch (fc & IEEE80211_FCTL_STYPE) {
2583 case IEEE80211_STYPE_BEACON:
2584 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2585 break;
2586 case IEEE80211_STYPE_PROBE_RESP:
2587 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2588 break;
2589 case IEEE80211_STYPE_AUTH:
2590 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2591 break;
2592 case IEEE80211_STYPE_DEAUTH:
2593 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2594 break;
2595 case IEEE80211_STYPE_DISASSOC:
2596 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2597 break;
2598 case IEEE80211_STYPE_ASSOC_RESP:
2599 case IEEE80211_STYPE_REASSOC_RESP:
2600 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2601 break;
2602 case IEEE80211_STYPE_ACTION:
2603 switch (mgmt->u.action.category) {
2604 case WLAN_CATEGORY_SPECTRUM_MGMT:
2605 ieee80211_sta_process_chanswitch(sdata,
2606 &mgmt->u.action.u.chan_switch.sw_elem,
2607 (void *)ifmgd->associated->priv,
2608 rx_status->mactime);
77fdaa12 2609 break;
77fdaa12 2610 }
77fdaa12 2611 }
77fdaa12
JB		 2612 mutex_unlock(&ifmgd->mtx);
2613
66e67e41
JB		 2614 switch (rma) {
2615 case RX_MGMT_NONE:
2616 /* no action */
2617 break;
2618 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2619 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2620 break;
2621 case RX_MGMT_CFG80211_DISASSOC:
2622 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2623 break;
2624 case RX_MGMT_CFG80211_RX_AUTH:
2625 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2626 break;
2627 case RX_MGMT_CFG80211_RX_ASSOC:
2628 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2629 break;
2630 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2631 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2632 break;
2633 default:
2634 WARN(1, "unexpected: %d", rma);
b054b747 2635 }
f0706e82
JB		 2636}
2637
9c6bd790 2638static void ieee80211_sta_timer(unsigned long data)
f0706e82 2639{
60f8b39c
JB		 2640 struct ieee80211_sub_if_data *sdata =
2641 (struct ieee80211_sub_if_data *) data;
46900298 2642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2643 struct ieee80211_local *local = sdata->local;
f0706e82 2644
5bb644a0
JB		 2645 if (local->quiescing) {
2646 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2647 return;
2648 }
2649
64592c8f 2650 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2651}
2652
04ac3c0e 2653static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2654 u8 *bssid, u8 reason)
04ac3c0e
FF		 2655{
2656 struct ieee80211_local *local = sdata->local;
2657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2658 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2659
37ad3888
JB		 2660 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2661 false, frame_buf);
04ac3c0e 2662 mutex_unlock(&ifmgd->mtx);
37ad3888 2663
04ac3c0e
FF		 2664 /*
2665 * must be outside lock due to cfg80211,
2666 * but that's not a problem.
2667 */
6ae16775 2668 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 2669
2670 mutex_lock(&local->mtx);
2671 ieee80211_recalc_idle(local);
2672 mutex_unlock(&local->mtx);
2673
04ac3c0e
FF		 2674 mutex_lock(&ifmgd->mtx);
2675}
2676
66e67e41
JB		 2677static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2678{
2679 struct ieee80211_local *local = sdata->local;
2680 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2681 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2682
2683 lockdep_assert_held(&ifmgd->mtx);
2684
2685 if (WARN_ON_ONCE(!auth_data))
2686 return -EINVAL;
2687
66e67e41
JB		 2688 auth_data->tries++;
2689
2690 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2691 sdata_info(sdata, "authentication with %pM timed out\n",
2692 auth_data->bss->bssid);
66e67e41
JB		 2693
2694 /*
2695 * Most likely AP is not in the range so remove the
2696 * bss struct for that AP.
2697 */
2698 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2699
2700 return -ETIMEDOUT;
2701 }
2702
a1845fc7
JB		 2703 drv_mgd_prepare_tx(local, sdata);
2704
66e67e41 2705 if (auth_data->bss->proberesp_ies) {
bdcbd8e0
JB		 2706 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2707 auth_data->bss->bssid, auth_data->tries,
2708 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2709
2710 auth_data->expected_transaction = 2;
2711 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2712 auth_data->ie, auth_data->ie_len,
2713 auth_data->bss->bssid,
2714 auth_data->bss->bssid, NULL, 0, 0);
2715 } else {
2716 const u8 *ssidie;
2717
bdcbd8e0
JB		 2718 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2719 auth_data->bss->bssid, auth_data->tries,
2720 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2721
2722 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2723 if (!ssidie)
2724 return -EINVAL;
2725 /*
2726 * Direct probe is sent to broadcast address as some APs
2727 * will not answer to direct packet in unassociated state.
2728 */
2729 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
fe94fe05
JB		 2730 NULL, 0, (u32) -1, true, false,
2731 auth_data->bss->channel);
66e67e41
JB		 2732 }
2733
2734 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2735 run_again(ifmgd, auth_data->timeout);
2736
2737 return 0;
2738}
2739
2740static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2741{
2742 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2743 struct ieee80211_local *local = sdata->local;
2744
2745 lockdep_assert_held(&sdata->u.mgd.mtx);
2746
66e67e41
JB		 2747 assoc_data->tries++;
2748 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2749 sdata_info(sdata, "association with %pM timed out\n",
2750 assoc_data->bss->bssid);
66e67e41
JB		 2751
2752 /*
2753 * Most likely AP is not in the range so remove the
2754 * bss struct for that AP.
2755 */
2756 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2757
2758 return -ETIMEDOUT;
2759 }
2760
bdcbd8e0
JB		 2761 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2762 assoc_data->bss->bssid, assoc_data->tries,
2763 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2764 ieee80211_send_assoc(sdata);
2765
2766 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2767 run_again(&sdata->u.mgd, assoc_data->timeout);
2768
2769 return 0;
2770}
2771
1fa57d01 2772void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2773{
9c6bd790 2774 struct ieee80211_local *local = sdata->local;
1fa57d01 2775 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2776
77fdaa12
JB		 2777 mutex_lock(&ifmgd->mtx);
2778
66e67e41
JB		 2779 if (ifmgd->auth_data &&
2780 time_after(jiffies, ifmgd->auth_data->timeout)) {
2781 if (ifmgd->auth_data->done) {
2782 /*
2783 * ok ... we waited for assoc but userspace didn't,
2784 * so let's just kill the auth data
2785 */
2786 ieee80211_destroy_auth_data(sdata, false);
2787 } else if (ieee80211_probe_auth(sdata)) {
2788 u8 bssid[ETH_ALEN];
2789
2790 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2791
2792 ieee80211_destroy_auth_data(sdata, false);
2793
2794 mutex_unlock(&ifmgd->mtx);
2795 cfg80211_send_auth_timeout(sdata->dev, bssid);
2796 mutex_lock(&ifmgd->mtx);
2797 }
2798 } else if (ifmgd->auth_data)
2799 run_again(ifmgd, ifmgd->auth_data->timeout);
2800
2801 if (ifmgd->assoc_data &&
2802 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2803 if (!ifmgd->assoc_data->have_beacon ||
2804 ieee80211_do_assoc(sdata)) {
2805 u8 bssid[ETH_ALEN];
2806
2807 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2808
2809 ieee80211_destroy_assoc_data(sdata, false);
2810
2811 mutex_unlock(&ifmgd->mtx);
2812 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2813 mutex_lock(&ifmgd->mtx);
2814 }
2815 } else if (ifmgd->assoc_data)
2816 run_again(ifmgd, ifmgd->assoc_data->timeout);
2817
b291ba11
JB		 2818 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2819 IEEE80211_STA_CONNECTION_POLL) &&
2820 ifmgd->associated) {
a43abf29 2821 u8 bssid[ETH_ALEN];
72a8a3ed 2822 int max_tries;
a43abf29 2823
0c1ad2ca 2824 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2825
72a8a3ed 2826 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2827 max_tries = max_nullfunc_tries;
72a8a3ed 2828 else
180205bd 2829 max_tries = max_probe_tries;
72a8a3ed 2830
4e5ff376
FF		 2831 /* ACK received for nullfunc probing frame */
2832 if (!ifmgd->probe_send_count)
2833 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2834 else if (ifmgd->nullfunc_failed) {
2835 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2836 mlme_dbg(sdata,
2837 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2838 bssid, ifmgd->probe_send_count,
2839 max_tries);
04ac3c0e
FF		 2840 ieee80211_mgd_probe_ap_send(sdata);
2841 } else {
bdcbd8e0
JB		 2842 mlme_dbg(sdata,
2843 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2844 bssid);
95acac61
JB		 2845 ieee80211_sta_connection_lost(sdata, bssid,
2846 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2847 }
2848 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2849 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2850 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2851 mlme_dbg(sdata,
2852 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2853 bssid, probe_wait_ms);
95acac61
JB		 2854 ieee80211_sta_connection_lost(sdata, bssid,
2855 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2856 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2857 mlme_dbg(sdata,
2858 "No probe response from AP %pM after %dms, try %d/%i\n",
2859 bssid, probe_wait_ms,
2860 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2861 ieee80211_mgd_probe_ap_send(sdata);
2862 } else {
b291ba11
JB		 2863 /*
2864 * We actually lost the connection ... or did we?
2865 * Let's make sure!
2866 */
b38afa87
BG		 2867 wiphy_debug(local->hw.wiphy,
2868 "%s: No probe response from AP %pM"
2869 " after %dms, disconnecting.\n",
2870 sdata->name,
180205bd 2871 bssid, probe_wait_ms);
04ac3c0e 2872
95acac61
JB		 2873 ieee80211_sta_connection_lost(sdata, bssid,
2874 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2875 }
2876 }
2877
77fdaa12 2878 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2879
2880 mutex_lock(&local->mtx);
2881 ieee80211_recalc_idle(local);
2882 mutex_unlock(&local->mtx);
f0706e82
JB		 2883}
2884
b291ba11
JB		 2885static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2886{
2887 struct ieee80211_sub_if_data *sdata =
2888 (struct ieee80211_sub_if_data *) data;
2889 struct ieee80211_local *local = sdata->local;
2890
2891 if (local->quiescing)
2892 return;
2893
1e4dcd01
JO		 2894 ieee80211_queue_work(&sdata->local->hw,
2895 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2896}
2897
2898static void ieee80211_sta_conn_mon_timer(unsigned long data)
2899{
2900 struct ieee80211_sub_if_data *sdata =
2901 (struct ieee80211_sub_if_data *) data;
2902 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2903 struct ieee80211_local *local = sdata->local;
2904
2905 if (local->quiescing)
2906 return;
2907
42935eca 2908 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2909}
2910
2911static void ieee80211_sta_monitor_work(struct work_struct *work)
2912{
2913 struct ieee80211_sub_if_data *sdata =
2914 container_of(work, struct ieee80211_sub_if_data,
2915 u.mgd.monitor_work);
2916
2917 ieee80211_mgd_probe_ap(sdata, false);
2918}
2919
9c6bd790
JB		 2920static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2921{
494f1fe5
EP		 2922 u32 flags;
2923
ad935687 2924 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2925 __ieee80211_stop_poll(sdata);
ad935687 2926
b291ba11 2927 /* let's probe the connection once */
494f1fe5
EP		 2928 flags = sdata->local->hw.flags;
2929 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2930 ieee80211_queue_work(&sdata->local->hw,
2931 &sdata->u.mgd.monitor_work);
b291ba11 2932 /* and do all the other regular work too */
64592c8f 2933 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2934 }
9c6bd790 2935}
f0706e82 2936
5bb644a0
JB		 2937#ifdef CONFIG_PM
2938void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2939{
2940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2941
2942 /*
2943 * we need to use atomic bitops for the running bits
2944 * only because both timers might fire at the same
2945 * time -- the code here is properly synchronised.
2946 */
2947
d1f5b7a3
JB		 2948 cancel_work_sync(&ifmgd->request_smps_work);
2949
0ecfe806 2950 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2951 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 2952 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 2953 if (del_timer_sync(&ifmgd->timer))
2954 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2955
2956 cancel_work_sync(&ifmgd->chswitch_work);
2957 if (del_timer_sync(&ifmgd->chswitch_timer))
2958 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2959
b291ba11
JB		 2960 /* these will just be re-established on connection */
2961 del_timer_sync(&ifmgd->conn_mon_timer);
2962 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2963}
2964
2965void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2966{
2967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2968
676b58c2
RM		 2969 if (!ifmgd->associated)
2970 return;
2971
95acac61
JB		 2972 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2973 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2974 mutex_lock(&ifmgd->mtx);
2975 if (ifmgd->associated) {
bdcbd8e0
JB		 2976 mlme_dbg(sdata,
2977 "driver requested disconnect after resume\n");
95acac61
JB		 2978 ieee80211_sta_connection_lost(sdata,
2979 ifmgd->associated->bssid,
2980 WLAN_REASON_UNSPECIFIED);
2981 mutex_unlock(&ifmgd->mtx);
2982 return;
2983 }
2984 mutex_unlock(&ifmgd->mtx);
2985 }
2986
5bb644a0
JB		 2987 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2988 add_timer(&ifmgd->timer);
2989 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2990 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2991 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2992
2993 mutex_lock(&sdata->local->mtx);
46090979 2994 ieee80211_restart_sta_timer(sdata);
925e64c3 2995 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2996}
2997#endif
2998
9c6bd790
JB		 2999/* interface setup */
3000void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3001{
46900298 3002 struct ieee80211_if_managed *ifmgd;
988c0f72 3003
46900298 3004 ifmgd = &sdata->u.mgd;
b291ba11 3005 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3006 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3007 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3008 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3009 INIT_WORK(&ifmgd->csa_connection_drop_work,
3010 ieee80211_csa_connection_drop_work);
d1f5b7a3 3011 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3012 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3013 (unsigned long) sdata);
b291ba11
JB		 3014 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3015 (unsigned long) sdata);
3016 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3017 (unsigned long) sdata);
46900298 3018 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3019 (unsigned long) sdata);
9c6bd790 3020
ab1faead 3021 ifmgd->flags = 0;
1478acb3 3022 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3023 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3024 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3025
77fdaa12 3026 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3027
3028 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3029 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3030 else
3031 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3032}
3033
77fdaa12
JB		 3034/* scan finished notification */
3035void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3036{
31ee67a1 3037 struct ieee80211_sub_if_data *sdata;
60f8b39c 3038
77fdaa12
JB		 3039 /* Restart STA timers */
3040 rcu_read_lock();
3041 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3042 ieee80211_restart_sta_timer(sdata);
3043 rcu_read_unlock();
3044}
60f8b39c 3045
77fdaa12
JB		 3046int ieee80211_max_network_latency(struct notifier_block *nb,
3047 unsigned long data, void *dummy)
3048{
3049 s32 latency_usec = (s32) data;
3050 struct ieee80211_local *local =
3051 container_of(nb, struct ieee80211_local,
3052 network_latency_notifier);
1fa6f4af 3053
77fdaa12
JB		 3054 mutex_lock(&local->iflist_mtx);
3055 ieee80211_recalc_ps(local, latency_usec);
3056 mutex_unlock(&local->iflist_mtx);
dfe67012 3057
77fdaa12 3058 return 0;
9c6bd790
JB		 3059}
3060
b17166a7
JB		 3061static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3062 struct cfg80211_bss *cbss)
a1cf775d
JB		 3063{
3064 struct ieee80211_local *local = sdata->local;
3065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39
JB		 3066 int ht_cfreq;
3067 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3068 const u8 *ht_oper_ie;
3069 const struct ieee80211_ht_operation *ht_oper = NULL;
3070 struct ieee80211_supported_band *sband;
a1cf775d 3071
24398e39
JB		 3072 sband = local->hw.wiphy->bands[cbss->channel->band];
3073
3074 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3075
3076 if (sband->ht_cap.ht_supported) {
3077 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3078 cbss->information_elements,
3079 cbss->len_information_elements);
3080 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3081 ht_oper = (void *)(ht_oper_ie + 2);
3082 }
3083
3084 if (ht_oper) {
3085 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3086 cbss->channel->band);
3087 /* check that channel matches the right operating channel */
3088 if (cbss->channel->center_freq != ht_cfreq) {
3089 /*
3090 * It's possible that some APs are confused here;
3091 * Netgear WNDR3700 sometimes reports 4 higher than
3092 * the actual channel in association responses, but
3093 * since we look at probe response/beacon data here
3094 * it should be OK.
3095 */
bdcbd8e0
JB		 3096 sdata_info(sdata,
3097 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3098 cbss->channel->center_freq,
3099 ht_cfreq, ht_oper->primary_chan,
3100 cbss->channel->band);
24398e39 3101 ht_oper = NULL;
3a40414f
JB		 3102 } else {
3103 channel_type = NL80211_CHAN_HT20;
24398e39
JB		 3104 }
3105 }
3106
3a40414f
JB		 3107 if (ht_oper && sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3108 /*
3109 * cfg80211 already verified that the channel itself can
3110 * be used, but it didn't check that we can do the right
3111 * HT type, so do that here as well. If HT40 isn't allowed
3112 * on this channel, disable 40 MHz operation.
3113 */
24398e39 3114
3a40414f
JB		 3115 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3116 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3117 if (cbss->channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
3118 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3119 else
24398e39 3120 channel_type = NL80211_CHAN_HT40PLUS;
3a40414f
JB		 3121 break;
3122 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3123 if (cbss->channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
3124 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3125 else
24398e39 3126 channel_type = NL80211_CHAN_HT40MINUS;
3a40414f 3127 break;
24398e39
JB		 3128 }
3129 }
3130
3131 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3132 /* can only fail due to HT40+/- mismatch */
3133 channel_type = NL80211_CHAN_HT20;
bdcbd8e0
JB		 3134 sdata_info(sdata,
3135 "disabling 40 MHz due to multi-vif mismatch\n");
24398e39
JB		 3136 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3137 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3138 channel_type));
3139 }
3140
5d6a1b06 3141 local->oper_channel = cbss->channel;
6aee4ca3 3142 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
a1cf775d 3143
b17166a7
JB		 3144 return 0;
3145}
3146
3147static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3148 struct cfg80211_bss *cbss, bool assoc)
3149{
3150 struct ieee80211_local *local = sdata->local;
3151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3152 struct ieee80211_bss *bss = (void *)cbss->priv;
3153 struct sta_info *new_sta = NULL;
3154 bool have_sta = false;
3155 int err;
3156
3157 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3158 return -EINVAL;
3159
3160 if (assoc) {
3161 rcu_read_lock();
3162 have_sta = sta_info_get(sdata, cbss->bssid);
3163 rcu_read_unlock();
3164 }
3165
3166 if (!have_sta) {
3167 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3168 if (!new_sta)
3169 return -ENOMEM;
3170 }
3171
3172 mutex_lock(&local->mtx);
3173 ieee80211_recalc_idle(sdata->local);
3174 mutex_unlock(&local->mtx);
3175
13e0c8e3 3176 if (new_sta) {
5d6a1b06
JB		 3177 u32 rates = 0, basic_rates = 0;
3178 bool have_higher_than_11mbit;
3179 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3180 struct ieee80211_supported_band *sband;
3181
3182 sband = local->hw.wiphy->bands[cbss->channel->band];
3183
3184 err = ieee80211_prep_channel(sdata, cbss);
3185 if (err) {
3186 sta_info_free(local, new_sta);
3187 return err;
3188 }
5d6a1b06 3189
5d6a1b06
JB		 3190 ieee80211_get_rates(sband, bss->supp_rates,
3191 bss->supp_rates_len,
3192 &rates, &basic_rates,
3193 &have_higher_than_11mbit,
3194 &min_rate, &min_rate_index);
3195
3196 /*
3197 * This used to be a workaround for basic rates missing
3198 * in the association response frame. Now that we no
3199 * longer use the basic rates from there, it probably
3200 * doesn't happen any more, but keep the workaround so
3201 * in case some *other* APs are buggy in different ways
3202 * we can connect -- with a warning.
3203 */
3204 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3205 sdata_info(sdata,
3206 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3207 basic_rates = BIT(min_rate_index);
3208 }
3209
13e0c8e3 3210 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3211 sdata->vif.bss_conf.basic_rates = basic_rates;
3212
3213 /* cf. IEEE 802.11 9.2.12 */
3214 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3215 have_higher_than_11mbit)
3216 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3217 else
3218 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3219
3220 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3221
8c358bcd
JB		 3222 /* set timing information */
3223 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3224 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3225 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3226
3227 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3228 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3229 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3230 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3231
3232 if (assoc)
13e0c8e3 3233 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3234
13e0c8e3
JB		 3235 err = sta_info_insert(new_sta);
3236 new_sta = NULL;
a1cf775d 3237 if (err) {
bdcbd8e0
JB		 3238 sdata_info(sdata,
3239 "failed to insert STA entry for the AP (error %d)\n",
3240 err);
a1cf775d
JB		 3241 return err;
3242 }
3243 } else
b203ca39 3244 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3245
3246 return 0;
3247}
3248
77fdaa12
JB		 3249/* config hooks */
3250int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3251 struct cfg80211_auth_request *req)
9c6bd790 3252{
66e67e41
JB		 3253 struct ieee80211_local *local = sdata->local;
3254 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3255 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3256 u16 auth_alg;
66e67e41
JB		 3257 int err;
3258
3259 /* prepare auth data structure */
9c6bd790 3260
77fdaa12
JB		 3261 switch (req->auth_type) {
3262 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3263 auth_alg = WLAN_AUTH_OPEN;
3264 break;
3265 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3266 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3267 return -EOPNOTSUPP;
77fdaa12
JB		 3268 auth_alg = WLAN_AUTH_SHARED_KEY;
3269 break;
3270 case NL80211_AUTHTYPE_FT:
3271 auth_alg = WLAN_AUTH_FT;
3272 break;
3273 case NL80211_AUTHTYPE_NETWORK_EAP:
3274 auth_alg = WLAN_AUTH_LEAP;
3275 break;
3276 default:
3277 return -EOPNOTSUPP;
60f8b39c 3278 }
77fdaa12 3279
66e67e41
JB		 3280 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3281 if (!auth_data)
9c6bd790 3282 return -ENOMEM;
77fdaa12 3283
66e67e41 3284 auth_data->bss = req->bss;
77fdaa12
JB		 3285
3286 if (req->ie && req->ie_len) {
66e67e41
JB		 3287 memcpy(auth_data->ie, req->ie, req->ie_len);
3288 auth_data->ie_len = req->ie_len;
9c6bd790 3289 }
77fdaa12 3290
fffd0934 3291 if (req->key && req->key_len) {
66e67e41
JB		 3292 auth_data->key_len = req->key_len;
3293 auth_data->key_idx = req->key_idx;
3294 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3295 }
3296
66e67e41 3297 auth_data->algorithm = auth_alg;
60f8b39c 3298
66e67e41 3299 /* try to authenticate/probe */
2a33bee2 3300
66e67e41 3301 mutex_lock(&ifmgd->mtx);
2a33bee2 3302
66e67e41
JB		 3303 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3304 ifmgd->assoc_data) {
3305 err = -EBUSY;
3306 goto err_free;
2a33bee2
GE		 3307 }
3308
66e67e41
JB		 3309 if (ifmgd->auth_data)
3310 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3311
66e67e41
JB		 3312 /* prep auth_data so we don't go into idle on disassoc */
3313 ifmgd->auth_data = auth_data;
af6b6374 3314
66e67e41 3315 if (ifmgd->associated)
37ad3888 3316 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3317
bdcbd8e0 3318 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3319
a1cf775d
JB		 3320 err = ieee80211_prep_connection(sdata, req->bss, false);
3321 if (err)
66e67e41 3322 goto err_clear;
af6b6374 3323
66e67e41
JB		 3324 err = ieee80211_probe_auth(sdata);
3325 if (err) {
66e67e41
JB		 3326 sta_info_destroy_addr(sdata, req->bss->bssid);
3327 goto err_clear;
3328 }
3329
3330 /* hold our own reference */
3331 cfg80211_ref_bss(auth_data->bss);
3332 err = 0;
3333 goto out_unlock;
3334
3335 err_clear:
3d2abdfd
EP		 3336 memset(ifmgd->bssid, 0, ETH_ALEN);
3337 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3338 ifmgd->auth_data = NULL;
3339 err_free:
3340 kfree(auth_data);
3341 out_unlock:
3342 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3343
66e67e41 3344 return err;
af6b6374
JB		 3345}
3346
77fdaa12
JB		 3347int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3348 struct cfg80211_assoc_request *req)
f0706e82 3349{
66e67e41 3350 struct ieee80211_local *local = sdata->local;
77fdaa12 3351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3352 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3353 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3354 struct ieee80211_supported_band *sband;
9dde6423 3355 const u8 *ssidie, *ht_ie;
2a33bee2 3356 int i, err;
f0706e82 3357
66e67e41
JB		 3358 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3359 if (!ssidie)
3360 return -EINVAL;
3361
3362 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3363 if (!assoc_data)
3364 return -ENOMEM;
3365
77fdaa12 3366 mutex_lock(&ifmgd->mtx);
9c87ba67 3367
66e67e41 3368 if (ifmgd->associated)
37ad3888 3369 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3370
3371 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3372 err = -EBUSY;
3373 goto err_free;
af6b6374 3374 }
77fdaa12 3375
66e67e41
JB		 3376 if (ifmgd->assoc_data) {
3377 err = -EBUSY;
3378 goto err_free;
3379 }
77fdaa12 3380
66e67e41
JB		 3381 if (ifmgd->auth_data) {
3382 bool match;
3383
3384 /* keep sta info, bssid if matching */
b203ca39 3385 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3386 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3387 }
3388
66e67e41 3389 /* prepare assoc data */
19c3b830
JB		 3390
3391 /*
3392 * keep only the 40 MHz disable bit set as it might have
3393 * been set during authentication already, all other bits
3394 * should be reset for a new connection
3395 */
3396 ifmgd->flags &= IEEE80211_STA_DISABLE_40MHZ;
77fdaa12 3397
d8ec4433
JO		 3398 ifmgd->beacon_crc_valid = false;
3399
de5036aa
JB		 3400 /*
3401 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3402 * We still associate in non-HT mode (11a/b/g) if any one of these
3403 * ciphers is configured as pairwise.
3404 * We can set this to true for non-11n hardware, that'll be checked
3405 * separately along with the peer capabilities.
3406 */
1c4cb928 3407 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3408 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3409 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3410 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3411 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba 3412 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3413 netdev_info(sdata->dev,
d545daba 3414 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3415 }
3416 }
77fdaa12 3417
d545daba 3418 if (req->flags & ASSOC_REQ_DISABLE_HT) {
ef96a842 3419 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba
MP		 3420 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3421 }
ef96a842 3422
4e74bfdb
JB		 3423 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3424 sband = local->hw.wiphy->bands[req->bss->channel->band];
3425 if (!sband->ht_cap.ht_supported ||
1c4cb928 3426 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3427 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1b49de26
JB		 3428 if (!bss->wmm_used)
3429 netdev_info(sdata->dev,
3430 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3431 }
4e74bfdb 3432
d545daba
MP		 3433 /* disable VHT if we don't support it or the AP doesn't use WMM */
3434 if (!sband->vht_cap.vht_supported ||
3435 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3436 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3437 if (!bss->wmm_used)
3438 netdev_info(sdata->dev,
3439 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3440 }
3441
ef96a842
BG		 3442 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3443 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3444 sizeof(ifmgd->ht_capa_mask));
3445
77fdaa12 3446 if (req->ie && req->ie_len) {
66e67e41
JB		 3447 memcpy(assoc_data->ie, req->ie, req->ie_len);
3448 assoc_data->ie_len = req->ie_len;
3449 }
f679f65d 3450
66e67e41 3451 assoc_data->bss = req->bss;
f679f65d 3452
af6b6374
JB		 3453 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3454 if (ifmgd->powersave)
3455 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3456 else
3457 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3458 } else
3459 ifmgd->ap_smps = ifmgd->req_smps;
3460
66e67e41 3461 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3462 assoc_data->wmm = bss->wmm_used &&
3463 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3464 assoc_data->supp_rates = bss->supp_rates;
3465 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3466
3467 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3468 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3469 assoc_data->ap_ht_param =
3470 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3471 else
3472 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3473
ab13315a
KV		 3474 if (bss->wmm_used && bss->uapsd_supported &&
3475 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3476 assoc_data->uapsd = true;
ab13315a
KV		 3477 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3478 } else {
76f0303d 3479 assoc_data->uapsd = false;
ab13315a
KV		 3480 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3481 }
3482
66e67e41
JB		 3483 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3484 assoc_data->ssid_len = ssidie[1];
63f170e0 3485
77fdaa12 3486 if (req->prev_bssid)
66e67e41 3487 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3488
3489 if (req->use_mfp) {
3490 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3491 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3492 } else {
3493 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3494 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3495 }
3496
3497 if (req->crypto.control_port)
3498 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3499 else
3500 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3501
a621fa4d
JB		 3502 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3503 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3504
66e67e41
JB		 3505 /* kick off associate process */
3506
3507 ifmgd->assoc_data = assoc_data;
3508
a1cf775d
JB		 3509 err = ieee80211_prep_connection(sdata, req->bss, true);
3510 if (err)
3511 goto err_clear;
66e67e41
JB		 3512
3513 if (!bss->dtim_period &&
3514 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3515 /*
3516 * Wait up to one beacon interval ...
3517 * should this be more if we miss one?
3518 */
bdcbd8e0
JB		 3519 sdata_info(sdata, "waiting for beacon from %pM\n",
3520 ifmgd->bssid);
3f9768a5 3521 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3522 } else {
3523 assoc_data->have_beacon = true;
3524 assoc_data->sent_assoc = false;
3525 assoc_data->timeout = jiffies;
3526 }
3527 run_again(ifmgd, assoc_data->timeout);
3528
fcff4f10
PS		 3529 if (bss->corrupt_data) {
3530 char *corrupt_type = "data";
3531 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3532 if (bss->corrupt_data &
3533 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3534 corrupt_type = "beacon and probe response";
3535 else
3536 corrupt_type = "beacon";
3537 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3538 corrupt_type = "probe response";
bdcbd8e0
JB		 3539 sdata_info(sdata, "associating with AP with corrupt %s\n",
3540 corrupt_type);
fcff4f10
PS		 3541 }
3542
66e67e41
JB		 3543 err = 0;
3544 goto out;
3545 err_clear:
3d2abdfd
EP		 3546 memset(ifmgd->bssid, 0, ETH_ALEN);
3547 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3548 ifmgd->assoc_data = NULL;
3549 err_free:
3550 kfree(assoc_data);
3551 out:
3552 mutex_unlock(&ifmgd->mtx);
3553
3554 return err;
f0706e82
JB		 3555}
3556
77fdaa12 3557int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3558 struct cfg80211_deauth_request *req)
f0706e82 3559{
46900298 3560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3561 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 3562 bool tx = !req->local_state_change;
f0706e82 3563
77fdaa12
JB		 3564 mutex_lock(&ifmgd->mtx);
3565
37ad3888 3566 if (ifmgd->auth_data) {
66e67e41 3567 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3568 mutex_unlock(&ifmgd->mtx);
66e67e41 3569 return 0;
af6b6374 3570 }
77fdaa12 3571
bdcbd8e0
JB		 3572 sdata_info(sdata,
3573 "deauthenticating from %pM by local choice (reason=%d)\n",
3574 req->bssid, req->reason_code);
0ff71613 3575
37ad3888 3576 if (ifmgd->associated &&
8c7d857c 3577 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
37ad3888 3578 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6863255b 3579 req->reason_code, tx, frame_buf);
8c7d857c
EG		 3580 } else {
3581 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 3582 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3583 IEEE80211_STYPE_DEAUTH,
6863255b 3584 req->reason_code, tx,
37ad3888 3585 frame_buf);
8c7d857c
EG		 3586 }
3587
37ad3888
JB		 3588 mutex_unlock(&ifmgd->mtx);
3589
6ae16775
AQ		 3590 __cfg80211_send_deauth(sdata->dev, frame_buf,
3591 IEEE80211_DEAUTH_FRAME_LEN);
f0706e82 3592
7da7cc1d 3593 mutex_lock(&sdata->local->mtx);
bc83b681 3594 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3595 mutex_unlock(&sdata->local->mtx);
bc83b681 3596
f0706e82
JB		 3597 return 0;
3598}
84363e6e 3599
77fdaa12 3600int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3601 struct cfg80211_disassoc_request *req)
9c6bd790 3602{
77fdaa12 3603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3604 u8 bssid[ETH_ALEN];
6ae16775 3605 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 3606
77fdaa12 3607 mutex_lock(&ifmgd->mtx);
10f644a4 3608
8d8b261a
JB		 3609 /*
3610 * cfg80211 should catch this ... but it's racy since
3611 * we can receive a disassoc frame, process it, hand it
3612 * to cfg80211 while that's in a locked section already
3613 * trying to tell us that the user wants to disconnect.
3614 */
0c1ad2ca 3615 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3616 mutex_unlock(&ifmgd->mtx);
3617 return -ENOLINK;
3618 }
3619
bdcbd8e0
JB		 3620 sdata_info(sdata,
3621 "disassociating from %pM by local choice (reason=%d)\n",
3622 req->bss->bssid, req->reason_code);
0ff71613 3623
e69e95db 3624 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3625 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3626 req->reason_code, !req->local_state_change,
3627 frame_buf);
77fdaa12 3628 mutex_unlock(&ifmgd->mtx);
10f644a4 3629
6ae16775
AQ		 3630 __cfg80211_send_disassoc(sdata->dev, frame_buf,
3631 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 3632
7da7cc1d 3633 mutex_lock(&sdata->local->mtx);
bc83b681 3634 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3635 mutex_unlock(&sdata->local->mtx);
bc83b681 3636
10f644a4
JB		 3637 return 0;
3638}
026331c4 3639
afa762f6 3640void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3641{
3642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3643
3644 mutex_lock(&ifmgd->mtx);
3645 if (ifmgd->assoc_data)
3646 ieee80211_destroy_assoc_data(sdata, false);
3647 if (ifmgd->auth_data)
3648 ieee80211_destroy_auth_data(sdata, false);
3649 del_timer_sync(&ifmgd->timer);
3650 mutex_unlock(&ifmgd->mtx);
3651}
3652
a97c13c3
JO		 3653void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3654 enum nl80211_cqm_rssi_threshold_event rssi_event,
3655 gfp_t gfp)
3656{
3657 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3658
b5878a2d
JB		 3659 trace_api_cqm_rssi_notify(sdata, rssi_event);
3660
a97c13c3
JO		 3661 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3662}
3663EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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