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wireless: Fix typo in mac80211_hwsim.c
[mirror_ubuntu-zesty-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
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
147 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 148 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 149}
150
be099e82
LR		 151void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
152{
0c699c3a
LR		 153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154
8628172f
SG		 155 if (unlikely(!sdata->u.mgd.associated))
156 return;
157
be099e82
LR		 158 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
159 return;
160
161 mod_timer(&sdata->u.mgd.conn_mon_timer,
162 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 163
164 ifmgd->probe_send_count = 0;
be099e82
LR		 165}
166
5484e237 167static int ecw2cw(int ecw)
60f8b39c 168{
5484e237 169 return (1 << ecw) - 1;
60f8b39c
JB		 170}
171
d5522e03
JB		 172/*
173 * ieee80211_enable_ht should be called only after the operating band
174 * has been determined as ht configuration depends on the hw's
175 * HT abilities for a specific band.
176 */
177static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
178 struct ieee80211_ht_info *hti,
7cc44ed4
RM		 179 const u8 *bssid, u16 ap_ht_cap_flags,
180 bool beacon_htcap_ie)
d5522e03
JB		 181{
182 struct ieee80211_local *local = sdata->local;
183 struct ieee80211_supported_band *sband;
d5522e03
JB		 184 struct sta_info *sta;
185 u32 changed = 0;
172710bf 186 int hti_cfreq;
9ed6bcce 187 u16 ht_opmode;
0aaffa9b
JB		 188 bool enable_ht = true;
189 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 190 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
191
192 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
193
0aaffa9b
JB		 194 prev_chantype = sdata->vif.bss_conf.channel_type;
195
d5522e03
JB		 196 /* HT is not supported */
197 if (!sband->ht_cap.ht_supported)
198 enable_ht = false;
199
172710bf
BG		 200 if (enable_ht) {
201 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
202 sband->band);
203 /* check that channel matches the right operating channel */
204 if (local->hw.conf.channel->center_freq != hti_cfreq) {
205 /* Some APs mess this up, evidently.
206 * Netgear WNDR3700 sometimes reports 4 higher than
207 * the actual channel, for instance.
208 */
209 printk(KERN_DEBUG
210 "%s: Wrong control channel in association"
211 " response: configured center-freq: %d"
212 " hti-cfreq: %d hti->control_chan: %d"
213 " band: %d. Disabling HT.\n",
214 sdata->name,
215 local->hw.conf.channel->center_freq,
216 hti_cfreq, hti->control_chan,
217 sband->band);
218 enable_ht = false;
219 }
220 }
d5522e03
JB		 221
222 if (enable_ht) {
223 channel_type = NL80211_CHAN_HT20;
224
225 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
ef96a842 226 !ieee80111_cfg_override_disables_ht40(sdata) &&
d5522e03
JB		 227 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
228 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
229 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
230 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 231 if (!(local->hw.conf.channel->flags &
232 IEEE80211_CHAN_NO_HT40PLUS))
233 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 234 break;
235 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 236 if (!(local->hw.conf.channel->flags &
237 IEEE80211_CHAN_NO_HT40MINUS))
238 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 239 break;
240 }
241 }
242 }
243
fe6f212c
RC		 244 if (local->tmp_channel)
245 local->tmp_channel_type = channel_type;
d5522e03 246
0aaffa9b
JB		 247 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
248 /* can only fail due to HT40+/- mismatch */
249 channel_type = NL80211_CHAN_HT20;
250 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
251 }
d5522e03 252
7cc44ed4
RM		 253 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
254 /*
255 * Whenever the AP announces the HT mode change that can be
256 * 40MHz intolerant or etc., it would be safer to stop tx
257 * queues before doing hw config to avoid buffer overflow.
258 */
259 ieee80211_stop_queues_by_reason(&sdata->local->hw,
260 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
261
262 /* flush out all packets */
263 synchronize_net();
264
265 drv_flush(local, false);
266 }
267
0aaffa9b
JB		 268 /* channel_type change automatically detected */
269 ieee80211_hw_config(local, 0);
d5522e03 270
0aaffa9b 271 if (prev_chantype != channel_type) {
d5522e03 272 rcu_read_lock();
abe60632 273 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 274 if (sta)
275 rate_control_rate_update(local, sband, sta,
4fa00437 276 IEEE80211_RC_HT_CHANGED,
0aaffa9b 277 channel_type);
d5522e03 278 rcu_read_unlock();
7cc44ed4
RM		 279
280 if (beacon_htcap_ie)
281 ieee80211_wake_queues_by_reason(&sdata->local->hw,
282 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 283 }
d5522e03 284
9ed6bcce 285 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 286
287 /* if bss configuration changed store the new one */
0aaffa9b
JB		 288 if (sdata->ht_opmode_valid != enable_ht ||
289 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
290 prev_chantype != channel_type) {
d5522e03 291 changed |= BSS_CHANGED_HT;
9ed6bcce 292 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 293 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 294 }
295
296 return changed;
297}
298
9c6bd790
JB		 299/* frame sending functions */
300
66e67e41
JB		 301static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
302 struct ieee80211_supported_band *sband,
303 u32 *rates)
304{
305 int i, j, count;
306 *rates = 0;
307 count = 0;
308 for (i = 0; i < supp_rates_len; i++) {
309 int rate = (supp_rates[i] & 0x7F) * 5;
310
311 for (j = 0; j < sband->n_bitrates; j++)
312 if (sband->bitrates[j].bitrate == rate) {
313 *rates |= BIT(j);
314 count++;
315 break;
316 }
317 }
318
319 return count;
320}
321
322static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
323 struct sk_buff *skb, const u8 *ht_info_ie,
324 struct ieee80211_supported_band *sband,
325 struct ieee80211_channel *channel,
326 enum ieee80211_smps_mode smps)
327{
328 struct ieee80211_ht_info *ht_info;
329 u8 *pos;
330 u32 flags = channel->flags;
331 u16 cap;
332 struct ieee80211_sta_ht_cap ht_cap;
333
334 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
335
336 if (!sband->ht_cap.ht_supported)
337 return;
338
339 if (!ht_info_ie)
340 return;
341
342 if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info))
343 return;
344
345 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
346 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
347
348 ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2);
349
350 /* determine capability flags */
351 cap = ht_cap.cap;
352
353 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
354 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
355 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
356 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
357 cap &= ~IEEE80211_HT_CAP_SGI_40;
358 }
359 break;
360 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
361 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
362 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
363 cap &= ~IEEE80211_HT_CAP_SGI_40;
364 }
365 break;
366 }
367
368 /* set SM PS mode properly */
369 cap &= ~IEEE80211_HT_CAP_SM_PS;
370 switch (smps) {
371 case IEEE80211_SMPS_AUTOMATIC:
372 case IEEE80211_SMPS_NUM_MODES:
373 WARN_ON(1);
374 case IEEE80211_SMPS_OFF:
375 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
376 IEEE80211_HT_CAP_SM_PS_SHIFT;
377 break;
378 case IEEE80211_SMPS_STATIC:
379 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
380 IEEE80211_HT_CAP_SM_PS_SHIFT;
381 break;
382 case IEEE80211_SMPS_DYNAMIC:
383 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
384 IEEE80211_HT_CAP_SM_PS_SHIFT;
385 break;
386 }
387
388 /* reserve and fill IE */
389 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
390 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
391}
392
393static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
394{
395 struct ieee80211_local *local = sdata->local;
396 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
397 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
398 struct sk_buff *skb;
399 struct ieee80211_mgmt *mgmt;
400 u8 *pos, qos_info;
401 size_t offset = 0, noffset;
402 int i, count, rates_len, supp_rates_len;
403 u16 capab;
404 struct ieee80211_supported_band *sband;
405 u32 rates = 0;
406 struct ieee80211_bss *bss = (void *)assoc_data->bss->priv;
407
408 lockdep_assert_held(&ifmgd->mtx);
409
410 sband = local->hw.wiphy->bands[local->oper_channel->band];
411
412 if (assoc_data->supp_rates_len) {
413 /*
414 * Get all rates supported by the device and the AP as
415 * some APs don't like getting a superset of their rates
416 * in the association request (e.g. D-Link DAP 1353 in
417 * b-only mode)...
418 */
419 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
420 assoc_data->supp_rates_len,
421 sband, &rates);
422 } else {
423 /*
424 * In case AP not provide any supported rates information
425 * before association, we send information element(s) with
426 * all rates that we support.
427 */
428 rates = ~0;
429 rates_len = sband->n_bitrates;
430 }
431
432 skb = alloc_skb(local->hw.extra_tx_headroom +
433 sizeof(*mgmt) + /* bit too much but doesn't matter */
434 2 + assoc_data->ssid_len + /* SSID */
435 4 + rates_len + /* (extended) rates */
436 4 + /* power capability */
437 2 + 2 * sband->n_channels + /* supported channels */
438 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
439 assoc_data->ie_len + /* extra IEs */
440 9, /* WMM */
441 GFP_KERNEL);
442 if (!skb)
443 return;
444
445 skb_reserve(skb, local->hw.extra_tx_headroom);
446
447 capab = WLAN_CAPABILITY_ESS;
448
449 if (sband->band == IEEE80211_BAND_2GHZ) {
450 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
451 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
452 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
453 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
454 }
455
456 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
457 capab |= WLAN_CAPABILITY_PRIVACY;
458
459 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
460 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
461 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
462
463 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
464 memset(mgmt, 0, 24);
465 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
466 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
467 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
468
469 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
470 skb_put(skb, 10);
471 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
472 IEEE80211_STYPE_REASSOC_REQ);
473 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
474 mgmt->u.reassoc_req.listen_interval =
475 cpu_to_le16(local->hw.conf.listen_interval);
476 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
477 ETH_ALEN);
478 } else {
479 skb_put(skb, 4);
480 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
481 IEEE80211_STYPE_ASSOC_REQ);
482 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
483 mgmt->u.assoc_req.listen_interval =
484 cpu_to_le16(local->hw.conf.listen_interval);
485 }
486
487 /* SSID */
488 pos = skb_put(skb, 2 + assoc_data->ssid_len);
489 *pos++ = WLAN_EID_SSID;
490 *pos++ = assoc_data->ssid_len;
491 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
492
493 /* add all rates which were marked to be used above */
494 supp_rates_len = rates_len;
495 if (supp_rates_len > 8)
496 supp_rates_len = 8;
497
498 pos = skb_put(skb, supp_rates_len + 2);
499 *pos++ = WLAN_EID_SUPP_RATES;
500 *pos++ = supp_rates_len;
501
502 count = 0;
503 for (i = 0; i < sband->n_bitrates; i++) {
504 if (BIT(i) & rates) {
505 int rate = sband->bitrates[i].bitrate;
506 *pos++ = (u8) (rate / 5);
507 if (++count == 8)
508 break;
509 }
510 }
511
512 if (rates_len > count) {
513 pos = skb_put(skb, rates_len - count + 2);
514 *pos++ = WLAN_EID_EXT_SUPP_RATES;
515 *pos++ = rates_len - count;
516
517 for (i++; i < sband->n_bitrates; i++) {
518 if (BIT(i) & rates) {
519 int rate = sband->bitrates[i].bitrate;
520 *pos++ = (u8) (rate / 5);
521 }
522 }
523 }
524
525 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
526 /* 1. power capabilities */
527 pos = skb_put(skb, 4);
528 *pos++ = WLAN_EID_PWR_CAPABILITY;
529 *pos++ = 2;
530 *pos++ = 0; /* min tx power */
531 *pos++ = local->oper_channel->max_power; /* max tx power */
532
533 /* 2. supported channels */
534 /* TODO: get this in reg domain format */
535 pos = skb_put(skb, 2 * sband->n_channels + 2);
536 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
537 *pos++ = 2 * sband->n_channels;
538 for (i = 0; i < sband->n_channels; i++) {
539 *pos++ = ieee80211_frequency_to_channel(
540 sband->channels[i].center_freq);
541 *pos++ = 1; /* one channel in the subband*/
542 }
543 }
544
545 /* if present, add any custom IEs that go before HT */
546 if (assoc_data->ie_len && assoc_data->ie) {
547 static const u8 before_ht[] = {
548 WLAN_EID_SSID,
549 WLAN_EID_SUPP_RATES,
550 WLAN_EID_EXT_SUPP_RATES,
551 WLAN_EID_PWR_CAPABILITY,
552 WLAN_EID_SUPPORTED_CHANNELS,
553 WLAN_EID_RSN,
554 WLAN_EID_QOS_CAPA,
555 WLAN_EID_RRM_ENABLED_CAPABILITIES,
556 WLAN_EID_MOBILITY_DOMAIN,
557 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
558 };
559 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
560 before_ht, ARRAY_SIZE(before_ht),
561 offset);
562 pos = skb_put(skb, noffset - offset);
563 memcpy(pos, assoc_data->ie + offset, noffset - offset);
564 offset = noffset;
565 }
566
567 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N) &&
568 bss->wmm_used && local->hw.queues >= 4)
569 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_information_ie,
570 sband, local->oper_channel, ifmgd->ap_smps);
571
572 /* if present, add any custom non-vendor IEs that go after HT */
573 if (assoc_data->ie_len && assoc_data->ie) {
574 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
575 assoc_data->ie_len,
576 offset);
577 pos = skb_put(skb, noffset - offset);
578 memcpy(pos, assoc_data->ie + offset, noffset - offset);
579 offset = noffset;
580 }
581
582 if (assoc_data->wmm_used && local->hw.queues >= 4) {
583 if (assoc_data->uapsd_used) {
584 qos_info = local->uapsd_queues;
585 qos_info |= (local->uapsd_max_sp_len <<
586 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
587 } else {
588 qos_info = 0;
589 }
590
591 pos = skb_put(skb, 9);
592 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
593 *pos++ = 7; /* len */
594 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
595 *pos++ = 0x50;
596 *pos++ = 0xf2;
597 *pos++ = 2; /* WME */
598 *pos++ = 0; /* WME info */
599 *pos++ = 1; /* WME ver */
600 *pos++ = qos_info;
601 }
602
603 /* add any remaining custom (i.e. vendor specific here) IEs */
604 if (assoc_data->ie_len && assoc_data->ie) {
605 noffset = assoc_data->ie_len;
606 pos = skb_put(skb, noffset - offset);
607 memcpy(pos, assoc_data->ie + offset, noffset - offset);
608 }
609
610 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
611 ieee80211_tx_skb(sdata, skb);
612}
613
ef422bc0 614static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 615 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 616 void *cookie, bool send_frame)
9ac19a90
JB		 617{
618 struct ieee80211_local *local = sdata->local;
46900298 619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 620 struct sk_buff *skb;
621 struct ieee80211_mgmt *mgmt;
9aed3cc1 622
65fc73ac 623 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
d15b8459 624 if (!skb)
9ac19a90 625 return;
d15b8459 626
9ac19a90
JB		 627 skb_reserve(skb, local->hw.extra_tx_headroom);
628
629 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
630 memset(mgmt, 0, 24);
77fdaa12 631 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 632 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 633 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 634 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 635 skb_put(skb, 2);
ef422bc0 636 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 637 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
638
53b46b84 639 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 640 if (cookie)
641 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
642 else
643 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 644 else
ce470613
HS		 645 if (cookie)
646 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
647 else
648 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 649 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
650 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 651
652 if (send_frame)
653 ieee80211_tx_skb(sdata, skb);
654 else
655 kfree_skb(skb);
9ac19a90
JB		 656}
657
572e0012
KV		 658void ieee80211_send_pspoll(struct ieee80211_local *local,
659 struct ieee80211_sub_if_data *sdata)
660{
572e0012
KV		 661 struct ieee80211_pspoll *pspoll;
662 struct sk_buff *skb;
572e0012 663
d8cd189e
KV		 664 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
665 if (!skb)
572e0012 666 return;
572e0012 667
d8cd189e
KV		 668 pspoll = (struct ieee80211_pspoll *) skb->data;
669 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 670
62ae67be
JB		 671 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
672 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 673}
674
965bedad
JB		 675void ieee80211_send_nullfunc(struct ieee80211_local *local,
676 struct ieee80211_sub_if_data *sdata,
677 int powersave)
678{
679 struct sk_buff *skb;
d8cd189e 680 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 681 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 682
d8cd189e
KV		 683 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
684 if (!skb)
965bedad 685 return;
965bedad 686
d8cd189e 687 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 688 if (powersave)
d8cd189e 689 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 690
62ae67be 691 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 692 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
693 IEEE80211_STA_CONNECTION_POLL))
694 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
695
62ae67be 696 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 697}
698
d524215f
FF		 699static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
700 struct ieee80211_sub_if_data *sdata)
701{
702 struct sk_buff *skb;
703 struct ieee80211_hdr *nullfunc;
704 __le16 fc;
705
706 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
707 return;
708
709 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 710 if (!skb)
d524215f 711 return;
d15b8459 712
d524215f
FF		 713 skb_reserve(skb, local->hw.extra_tx_headroom);
714
715 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
716 memset(nullfunc, 0, 30);
717 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
718 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
719 nullfunc->frame_control = fc;
720 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
721 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
722 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
723 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
724
725 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
726 ieee80211_tx_skb(sdata, skb);
727}
728
cc32abd4
JB		 729/* spectrum management related things */
730static void ieee80211_chswitch_work(struct work_struct *work)
731{
732 struct ieee80211_sub_if_data *sdata =
733 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 734 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
735
9607e6b6 736 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 737 return;
738
77fdaa12
JB		 739 mutex_lock(&ifmgd->mtx);
740 if (!ifmgd->associated)
741 goto out;
cc32abd4
JB		 742
743 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 744 if (!sdata->local->ops->channel_switch) {
745 /* call "hw_config" only if doing sw channel switch */
746 ieee80211_hw_config(sdata->local,
747 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 748 } else {
749 /* update the device channel directly */
750 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 751 }
77fdaa12 752
cc32abd4 753 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 754 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 755
cc32abd4
JB		 756 ieee80211_wake_queues_by_reason(&sdata->local->hw,
757 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 758 out:
759 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
760 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 761}
762
5ce6e438
JB		 763void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
764{
765 struct ieee80211_sub_if_data *sdata;
766 struct ieee80211_if_managed *ifmgd;
767
768 sdata = vif_to_sdata(vif);
769 ifmgd = &sdata->u.mgd;
770
771 trace_api_chswitch_done(sdata, success);
772 if (!success) {
773 /*
774 * If the channel switch was not successful, stay
775 * around on the old channel. We currently lack
776 * good handling of this situation, possibly we
777 * should just drop the association.
778 */
779 sdata->local->csa_channel = sdata->local->oper_channel;
780 }
781
782 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
783}
784EXPORT_SYMBOL(ieee80211_chswitch_done);
785
cc32abd4
JB		 786static void ieee80211_chswitch_timer(unsigned long data)
787{
788 struct ieee80211_sub_if_data *sdata =
789 (struct ieee80211_sub_if_data *) data;
790 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
791
5bb644a0
JB		 792 if (sdata->local->quiescing) {
793 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
794 return;
795 }
796
42935eca 797 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 798}
799
800void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
801 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 802 struct ieee80211_bss *bss,
803 u64 timestamp)
cc32abd4 804{
0c1ad2ca
JB		 805 struct cfg80211_bss *cbss =
806 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 807 struct ieee80211_channel *new_ch;
808 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 809 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
810 cbss->channel->band);
cc32abd4 811
77fdaa12
JB		 812 ASSERT_MGD_MTX(ifmgd);
813
814 if (!ifmgd->associated)
cc32abd4
JB		 815 return;
816
fbe9c429 817 if (sdata->local->scanning)
cc32abd4
JB		 818 return;
819
820 /* Disregard subsequent beacons if we are already running a timer
821 processing a CSA */
822
823 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
824 return;
825
826 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
827 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
828 return;
829
830 sdata->local->csa_channel = new_ch;
831
5ce6e438
JB		 832 if (sdata->local->ops->channel_switch) {
833 /* use driver's channel switch callback */
834 struct ieee80211_channel_switch ch_switch;
835 memset(&ch_switch, 0, sizeof(ch_switch));
836 ch_switch.timestamp = timestamp;
837 if (sw_elem->mode) {
838 ch_switch.block_tx = true;
839 ieee80211_stop_queues_by_reason(&sdata->local->hw,
840 IEEE80211_QUEUE_STOP_REASON_CSA);
841 }
842 ch_switch.channel = new_ch;
843 ch_switch.count = sw_elem->count;
844 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
845 drv_channel_switch(sdata->local, &ch_switch);
846 return;
847 }
848
849 /* channel switch handled in software */
cc32abd4 850 if (sw_elem->count <= 1) {
42935eca 851 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 852 } else {
9feaddc7
WYG		 853 if (sw_elem->mode)
854 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 855 IEEE80211_QUEUE_STOP_REASON_CSA);
856 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
857 mod_timer(&ifmgd->chswitch_timer,
858 jiffies +
859 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 860 cbss->beacon_interval));
cc32abd4
JB		 861 }
862}
863
864static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
865 u16 capab_info, u8 *pwr_constr_elem,
866 u8 pwr_constr_elem_len)
867{
868 struct ieee80211_conf *conf = &sdata->local->hw.conf;
869
870 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
871 return;
872
873 /* Power constraint IE length should be 1 octet */
874 if (pwr_constr_elem_len != 1)
875 return;
876
a48b13ac 877 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 878 (*pwr_constr_elem != sdata->local->power_constr_level)) {
879 sdata->local->power_constr_level = *pwr_constr_elem;
880 ieee80211_hw_config(sdata->local, 0);
881 }
882}
883
f90754c1
JO		 884void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
885{
886 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
887 struct ieee80211_local *local = sdata->local;
888 struct ieee80211_conf *conf = &local->hw.conf;
889
890 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
891 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
892 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
893
894 local->disable_dynamic_ps = false;
895 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
896}
897EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
898
899void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
900{
901 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
902 struct ieee80211_local *local = sdata->local;
903 struct ieee80211_conf *conf = &local->hw.conf;
904
905 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
906 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
907 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
908
909 local->disable_dynamic_ps = true;
910 conf->dynamic_ps_timeout = 0;
911 del_timer_sync(&local->dynamic_ps_timer);
912 ieee80211_queue_work(&local->hw,
913 &local->dynamic_ps_enable_work);
914}
915EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
916
965bedad
JB		 917/* powersave */
918static void ieee80211_enable_ps(struct ieee80211_local *local,
919 struct ieee80211_sub_if_data *sdata)
920{
921 struct ieee80211_conf *conf = &local->hw.conf;
922
d5edaedc
JB		 923 /*
924 * If we are scanning right now then the parameters will
925 * take effect when scan finishes.
926 */
fbe9c429 927 if (local->scanning)
d5edaedc
JB		 928 return;
929
965bedad
JB		 930 if (conf->dynamic_ps_timeout > 0 &&
931 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
932 mod_timer(&local->dynamic_ps_timer, jiffies +
933 msecs_to_jiffies(conf->dynamic_ps_timeout));
934 } else {
935 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
936 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 937
2a13052f
JO		 938 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
939 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
940 return;
941
942 conf->flags |= IEEE80211_CONF_PS;
943 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 944 }
945}
946
947static void ieee80211_change_ps(struct ieee80211_local *local)
948{
949 struct ieee80211_conf *conf = &local->hw.conf;
950
951 if (local->ps_sdata) {
965bedad
JB		 952 ieee80211_enable_ps(local, local->ps_sdata);
953 } else if (conf->flags & IEEE80211_CONF_PS) {
954 conf->flags &= ~IEEE80211_CONF_PS;
955 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
956 del_timer_sync(&local->dynamic_ps_timer);
957 cancel_work_sync(&local->dynamic_ps_enable_work);
958 }
959}
960
808118cb
JY		 961static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
962{
963 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
964 struct sta_info *sta = NULL;
c2c98fde 965 bool authorized = false;
808118cb
JY		 966
967 if (!mgd->powersave)
968 return false;
969
05cb9108
JB		 970 if (mgd->broken_ap)
971 return false;
972
808118cb
JY		 973 if (!mgd->associated)
974 return false;
975
976 if (!mgd->associated->beacon_ies)
977 return false;
978
979 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
980 IEEE80211_STA_CONNECTION_POLL))
981 return false;
982
983 rcu_read_lock();
984 sta = sta_info_get(sdata, mgd->bssid);
985 if (sta)
c2c98fde 986 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 987 rcu_read_unlock();
988
c2c98fde 989 return authorized;
808118cb
JY		 990}
991
965bedad 992/* need to hold RTNL or interface lock */
10f644a4 993void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 994{
995 struct ieee80211_sub_if_data *sdata, *found = NULL;
996 int count = 0;
195e294d 997 int timeout;
965bedad
JB		 998
999 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1000 local->ps_sdata = NULL;
1001 return;
1002 }
1003
af6b6374
JB		 1004 if (!list_empty(&local->work_list)) {
1005 local->ps_sdata = NULL;
1006 goto change;
1007 }
1008
965bedad 1009 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1010 if (!ieee80211_sdata_running(sdata))
965bedad 1011 continue;
8c7914de
RM		 1012 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1013 /* If an AP vif is found, then disable PS
1014 * by setting the count to zero thereby setting
1015 * ps_sdata to NULL.
1016 */
1017 count = 0;
1018 break;
1019 }
965bedad
JB		 1020 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1021 continue;
1022 found = sdata;
1023 count++;
1024 }
1025
808118cb 1026 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1027 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1028 s32 beaconint_us;
1029
1030 if (latency < 0)
ed77134b 1031 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1032
1033 beaconint_us = ieee80211_tu_to_usec(
1034 found->vif.bss_conf.beacon_int);
1035
ff616381 1036 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1037 if (timeout < 0) {
1038 /*
ff616381
JO		 1039 * Go to full PSM if the user configures a very low
1040 * latency requirement.
0ab82b04
EP		 1041 * The 2000 second value is there for compatibility
1042 * until the PM_QOS_NETWORK_LATENCY is configured
1043 * with real values.
195e294d 1044 */
0ab82b04
EP		 1045 if (latency > (1900 * USEC_PER_MSEC) &&
1046 latency != (2000 * USEC_PER_SEC))
195e294d 1047 timeout = 0;
ff616381
JO		 1048 else
1049 timeout = 100;
195e294d 1050 }
f90754c1
JO		 1051 local->dynamic_ps_user_timeout = timeout;
1052 if (!local->disable_dynamic_ps)
1053 conf->dynamic_ps_timeout =
1054 local->dynamic_ps_user_timeout;
195e294d 1055
04fe2037 1056 if (beaconint_us > latency) {
10f644a4 1057 local->ps_sdata = NULL;
04fe2037 1058 } else {
56007a02 1059 struct ieee80211_bss *bss;
04fe2037 1060 int maxslp = 1;
56007a02 1061 u8 dtimper;
04fe2037 1062
56007a02
JB		 1063 bss = (void *)found->u.mgd.associated->priv;
1064 dtimper = bss->dtim_period;
1065
1066 /* If the TIM IE is invalid, pretend the value is 1 */
1067 if (!dtimper)
1068 dtimper = 1;
1069 else if (dtimper > 1)
04fe2037
JB		 1070 maxslp = min_t(int, dtimper,
1071 latency / beaconint_us);
1072
9ccebe61 1073 local->hw.conf.max_sleep_period = maxslp;
56007a02 1074 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1075 local->ps_sdata = found;
04fe2037 1076 }
10f644a4 1077 } else {
965bedad 1078 local->ps_sdata = NULL;
10f644a4 1079 }
965bedad 1080
af6b6374 1081 change:
965bedad
JB		 1082 ieee80211_change_ps(local);
1083}
1084
1085void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1086{
1087 struct ieee80211_local *local =
1088 container_of(work, struct ieee80211_local,
1089 dynamic_ps_disable_work);
1090
1091 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1092 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1093 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1094 }
1095
1096 ieee80211_wake_queues_by_reason(&local->hw,
1097 IEEE80211_QUEUE_STOP_REASON_PS);
1098}
1099
1100void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1101{
1102 struct ieee80211_local *local =
1103 container_of(work, struct ieee80211_local,
1104 dynamic_ps_enable_work);
1105 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1106 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1107 unsigned long flags;
1108 int q;
965bedad
JB		 1109
1110 /* can only happen when PS was just disabled anyway */
1111 if (!sdata)
1112 return;
1113
5e34069c
CL		 1114 ifmgd = &sdata->u.mgd;
1115
965bedad
JB		 1116 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1117 return;
1118
77b7023a
AN		 1119 if (!local->disable_dynamic_ps &&
1120 local->hw.conf.dynamic_ps_timeout > 0) {
1121 /* don't enter PS if TX frames are pending */
1122 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1123 mod_timer(&local->dynamic_ps_timer, jiffies +
1124 msecs_to_jiffies(
1125 local->hw.conf.dynamic_ps_timeout));
1126 return;
1127 }
77b7023a
AN		 1128
1129 /*
1130 * transmission can be stopped by others which leads to
1131 * dynamic_ps_timer expiry. Postpone the ps timer if it
1132 * is not the actual idle state.
1133 */
1134 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1135 for (q = 0; q < local->hw.queues; q++) {
1136 if (local->queue_stop_reasons[q]) {
1137 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1138 flags);
1139 mod_timer(&local->dynamic_ps_timer, jiffies +
1140 msecs_to_jiffies(
1141 local->hw.conf.dynamic_ps_timeout));
1142 return;
1143 }
1144 }
1145 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1146 }
1ddc2867 1147
375177bf 1148 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1149 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1150 netif_tx_stop_all_queues(sdata->dev);
965bedad 1151
e8306f98
VN		 1152 if (drv_tx_frames_pending(local))
1153 mod_timer(&local->dynamic_ps_timer, jiffies +
1154 msecs_to_jiffies(
1155 local->hw.conf.dynamic_ps_timeout));
1156 else {
1157 ieee80211_send_nullfunc(local, sdata, 1);
1158 /* Flush to get the tx status of nullfunc frame */
1159 drv_flush(local, false);
1160 }
f3e85b9e
VN		 1161 }
1162
2a13052f
JO		 1163 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1164 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1165 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1166 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1167 local->hw.conf.flags |= IEEE80211_CONF_PS;
1168 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1169 }
f3e85b9e 1170
77b7023a
AN		 1171 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1172 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1173}
1174
1175void ieee80211_dynamic_ps_timer(unsigned long data)
1176{
1177 struct ieee80211_local *local = (void *) data;
1178
78f1a8b7 1179 if (local->quiescing || local->suspended)
5bb644a0
JB		 1180 return;
1181
42935eca 1182 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1183}
1184
60f8b39c 1185/* MLME */
f698d856 1186static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1187 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1188 u8 *wmm_param, size_t wmm_param_len)
1189{
f0706e82 1190 struct ieee80211_tx_queue_params params;
4ced3f74 1191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1192 size_t left;
1193 int count;
ab13315a 1194 u8 *pos, uapsd_queues = 0;
f0706e82 1195
e1b3ec1a
SG		 1196 if (!local->ops->conf_tx)
1197 return;
1198
af6b6374 1199 if (local->hw.queues < 4)
3434fbd3
JB		 1200 return;
1201
1202 if (!wmm_param)
1203 return;
1204
f0706e82
JB		 1205 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1206 return;
ab13315a
KV		 1207
1208 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 1209 uapsd_queues = local->uapsd_queues;
ab13315a 1210
f0706e82 1211 count = wmm_param[6] & 0x0f;
46900298 1212 if (count == ifmgd->wmm_last_param_set)
f0706e82 1213 return;
46900298 1214 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1215
1216 pos = wmm_param + 8;
1217 left = wmm_param_len - 8;
1218
1219 memset(&params, 0, sizeof(params));
1220
f0706e82
JB		 1221 local->wmm_acm = 0;
1222 for (; left >= 4; left -= 4, pos += 4) {
1223 int aci = (pos[0] >> 5) & 0x03;
1224 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1225 bool uapsd = false;
f0706e82
JB		 1226 int queue;
1227
1228 switch (aci) {
0eeb59fe 1229 case 1: /* AC_BK */
e100bb64 1230 queue = 3;
988c0f72 1231 if (acm)
0eeb59fe 1232 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1233 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1234 uapsd = true;
f0706e82 1235 break;
0eeb59fe 1236 case 2: /* AC_VI */
e100bb64 1237 queue = 1;
988c0f72 1238 if (acm)
0eeb59fe 1239 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1240 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1241 uapsd = true;
f0706e82 1242 break;
0eeb59fe 1243 case 3: /* AC_VO */
e100bb64 1244 queue = 0;
988c0f72 1245 if (acm)
0eeb59fe 1246 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1247 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1248 uapsd = true;
f0706e82 1249 break;
0eeb59fe 1250 case 0: /* AC_BE */
f0706e82 1251 default:
e100bb64 1252 queue = 2;
988c0f72 1253 if (acm)
0eeb59fe 1254 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1255 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1256 uapsd = true;
f0706e82
JB		 1257 break;
1258 }
1259
1260 params.aifs = pos[0] & 0x0f;
1261 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1262 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1263 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1264 params.uapsd = uapsd;
1265
f4ea83dd 1266#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1267 wiphy_debug(local->hw.wiphy,
1268 "WMM queue=%d aci=%d acm=%d aifs=%d "
1269 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1270 queue, aci, acm,
1271 params.aifs, params.cw_min, params.cw_max,
1272 params.txop, params.uapsd);
3330d7be 1273#endif
f6f3def3
EP		 1274 sdata->tx_conf[queue] = params;
1275 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1276 wiphy_debug(local->hw.wiphy,
1277 "failed to set TX queue parameters for queue %d\n",
1278 queue);
f0706e82 1279 }
e1b3ec1a
SG		 1280
1281 /* enable WMM or activate new settings */
4ced3f74
JB		 1282 sdata->vif.bss_conf.qos = true;
1283 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 1284}
1285
7a5158ef
JB		 1286static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1287 u16 capab, bool erp_valid, u8 erp)
5628221c 1288{
bda3933a 1289 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1290 u32 changed = 0;
7a5158ef
JB		 1291 bool use_protection;
1292 bool use_short_preamble;
1293 bool use_short_slot;
1294
1295 if (erp_valid) {
1296 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1297 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1298 } else {
1299 use_protection = false;
1300 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1301 }
1302
1303 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1304 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1305 use_short_slot = true;
5628221c 1306
471b3efd 1307 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1308 bss_conf->use_cts_prot = use_protection;
1309 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1310 }
7e9ed188 1311
d43c7b37 1312 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1313 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1314 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1315 }
d9430a32 1316
7a5158ef 1317 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1318 bss_conf->use_short_slot = use_short_slot;
1319 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1320 }
1321
1322 return changed;
1323}
1324
f698d856 1325static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1326 struct cfg80211_bss *cbss,
ae5eb026 1327 u32 bss_info_changed)
f0706e82 1328{
0c1ad2ca 1329 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1330 struct ieee80211_local *local = sdata->local;
68542962 1331 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1332
ae5eb026 1333 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1334 /* set timing information */
68542962
JO		 1335 bss_conf->beacon_int = cbss->beacon_interval;
1336 bss_conf->timestamp = cbss->tsf;
5628221c 1337
77fdaa12
JB		 1338 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1339 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1340 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1341
7ccc8bd7
FF		 1342 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1343 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1344
0c1ad2ca
JB		 1345 sdata->u.mgd.associated = cbss;
1346 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1347
17e4ec14
JM		 1348 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1349
b291ba11
JB		 1350 /* just to be sure */
1351 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1352 IEEE80211_STA_BEACON_POLL);
1353
9ac19a90 1354 ieee80211_led_assoc(local, 1);
9306102e 1355
e5b900d2
JB		 1356 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1357 bss_conf->dtim_period = bss->dtim_period;
1358 else
1359 bss_conf->dtim_period = 0;
1360
68542962 1361 bss_conf->assoc = 1;
96dd22ac
JB		 1362 /*
1363 * For now just always ask the driver to update the basic rateset
1364 * when we have associated, we aren't checking whether it actually
1365 * changed or not.
1366 */
ae5eb026 1367 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1368
1369 /* And the BSSID changed - we're associated now */
1370 bss_info_changed |= BSS_CHANGED_BSSID;
1371
a97c13c3 1372 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1373 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1374 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1375 bss_info_changed |= BSS_CHANGED_CQM;
1376
68542962
JO		 1377 /* Enable ARP filtering */
1378 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1379 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1380 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1381 }
1382
ae5eb026 1383 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1384
056508dc
JB		 1385 mutex_lock(&local->iflist_mtx);
1386 ieee80211_recalc_ps(local, -1);
025e6be2 1387 ieee80211_recalc_smps(local);
056508dc 1388 mutex_unlock(&local->iflist_mtx);
e0cb686f 1389
8a5b33f5 1390 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1391 netif_carrier_on(sdata->dev);
f0706e82
JB		 1392}
1393
e69e95db 1394static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1395 bool remove_sta, bool tx)
aa458d17 1396{
46900298 1397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1398 struct ieee80211_local *local = sdata->local;
1399 struct sta_info *sta;
e0cb686f 1400 u32 changed = 0, config_changed = 0;
b291ba11 1401 u8 bssid[ETH_ALEN];
aa458d17 1402
77fdaa12
JB		 1403 ASSERT_MGD_MTX(ifmgd);
1404
b291ba11
JB		 1405 if (WARN_ON(!ifmgd->associated))
1406 return;
1407
0c1ad2ca 1408 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1409
77fdaa12
JB		 1410 ifmgd->associated = NULL;
1411 memset(ifmgd->bssid, 0, ETH_ALEN);
1412
1413 /*
1414 * we need to commit the associated = NULL change because the
1415 * scan code uses that to determine whether this iface should
1416 * go to/wake up from powersave or not -- and could otherwise
1417 * wake the queues erroneously.
1418 */
1419 smp_mb();
1420
1421 /*
1422 * Thus, we can only afterwards stop the queues -- to account
1423 * for the case where another CPU is finishing a scan at this
1424 * time -- we don't want the scan code to enable queues.
1425 */
aa458d17 1426
8a5b33f5 1427 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1428 netif_carrier_off(sdata->dev);
1429
2a419056 1430 mutex_lock(&local->sta_mtx);
abe60632 1431 sta = sta_info_get(sdata, bssid);
4cad6c7c 1432 if (sta) {
c2c98fde 1433 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1434 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1435 }
2a419056 1436 mutex_unlock(&local->sta_mtx);
aa458d17 1437
f5e5bf25
TW		 1438 changed |= ieee80211_reset_erp_info(sdata);
1439
f5e5bf25 1440 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1441 changed |= BSS_CHANGED_ASSOC;
1442 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1443
aa837e1d
JB		 1444 ieee80211_set_wmm_default(sdata);
1445
4797938c 1446 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1447 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1448
413ad50a
JB		 1449 /* on the next assoc, re-program HT parameters */
1450 sdata->ht_opmode_valid = false;
ef96a842
BG		 1451 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1452 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1453
a8302de9
VT		 1454 local->power_constr_level = 0;
1455
520eb820
KV		 1456 del_timer_sync(&local->dynamic_ps_timer);
1457 cancel_work_sync(&local->dynamic_ps_enable_work);
1458
e0cb686f
KV		 1459 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1460 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1461 config_changed |= IEEE80211_CONF_CHANGE_PS;
1462 }
a331400b 1463 local->ps_sdata = NULL;
ae5eb026 1464
e0cb686f 1465 ieee80211_hw_config(local, config_changed);
9cef8737 1466
68542962
JO		 1467 /* Disable ARP filtering */
1468 if (sdata->vif.bss_conf.arp_filter_enabled) {
1469 sdata->vif.bss_conf.arp_filter_enabled = false;
1470 changed |= BSS_CHANGED_ARP_FILTER;
1471 }
1472
0aaffa9b
JB		 1473 /* The BSSID (not really interesting) and HT changed */
1474 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1475 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1476
07ba55d7 1477 /* remove AP and TDLS peers */
e69e95db 1478 if (remove_sta)
07ba55d7 1479 sta_info_flush(local, sdata);
b9dcf712
JB		 1480
1481 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1482 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1483 del_timer_sync(&sdata->u.mgd.timer);
1484 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1485}
f0706e82 1486
3cf335d5
KV		 1487void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1488 struct ieee80211_hdr *hdr)
1489{
1490 /*
1491 * We can postpone the mgd.timer whenever receiving unicast frames
1492 * from AP because we know that the connection is working both ways
1493 * at that time. But multicast frames (and hence also beacons) must
1494 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1495 * data idle periods for sending the periodic probe request to the
1496 * AP we're connected to.
3cf335d5 1497 */
b291ba11
JB		 1498 if (is_multicast_ether_addr(hdr->addr1))
1499 return;
1500
be099e82 1501 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1502}
f0706e82 1503
4e5ff376
FF		 1504static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1505{
1506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1507
1508 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1509 IEEE80211_STA_CONNECTION_POLL)))
1510 return;
1511
1512 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1513 IEEE80211_STA_BEACON_POLL);
1514 mutex_lock(&sdata->local->iflist_mtx);
1515 ieee80211_recalc_ps(sdata->local, -1);
1516 mutex_unlock(&sdata->local->iflist_mtx);
1517
1518 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1519 return;
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));
1531}
1532
1533void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1534 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1535{
75706d0e 1536 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1537 return;
1538
04ac3c0e
FF		 1539 if (ack)
1540 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1541
1542 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1543 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1544 if (ack)
1545 sdata->u.mgd.probe_send_count = 0;
1546 else
1547 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1548 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1549 }
1550}
1551
a43abf29
ML		 1552static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1553{
1554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1555 const u8 *ssid;
f01a067d 1556 u8 *dst = ifmgd->associated->bssid;
180205bd 1557 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1558
1559 /*
1560 * Try sending broadcast probe requests for the last three
1561 * probe requests after the first ones failed since some
1562 * buggy APs only support broadcast probe requests.
1563 */
1564 if (ifmgd->probe_send_count >= unicast_limit)
1565 dst = NULL;
a43abf29 1566
4e5ff376
FF		 1567 /*
1568 * When the hardware reports an accurate Tx ACK status, it's
1569 * better to send a nullfunc frame instead of a probe request,
1570 * as it will kick us off the AP quickly if we aren't associated
1571 * anymore. The timeout will be reset if the frame is ACKed by
1572 * the AP.
1573 */
04ac3c0e
FF		 1574 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1575 ifmgd->nullfunc_failed = false;
4e5ff376 1576 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1577 } else {
4e5ff376 1578 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1579 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1580 (u32) -1, true, false);
4e5ff376 1581 }
a43abf29
ML		 1582
1583 ifmgd->probe_send_count++;
180205bd 1584 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1585 run_again(ifmgd, ifmgd->probe_timeout);
1586}
1587
b291ba11
JB		 1588static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1589 bool beacon)
04de8381 1590{
04de8381 1591 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1592 bool already = false;
34bfc411 1593
9607e6b6 1594 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1595 return;
1596
91a3bd76
LR		 1597 if (sdata->local->scanning)
1598 return;
1599
b8bc4b0a
JB		 1600 if (sdata->local->tmp_channel)
1601 return;
1602
77fdaa12
JB		 1603 mutex_lock(&ifmgd->mtx);
1604
1605 if (!ifmgd->associated)
1606 goto out;
1607
a860402d 1608#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1609 if (beacon && net_ratelimit())
1610 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1611 "- sending probe request\n", sdata->name);
a860402d 1612#endif
04de8381 1613
b291ba11
JB		 1614 /*
1615 * The driver/our work has already reported this event or the
1616 * connection monitoring has kicked in and we have already sent
1617 * a probe request. Or maybe the AP died and the driver keeps
1618 * reporting until we disassociate...
1619 *
1620 * In either case we have to ignore the current call to this
1621 * function (except for setting the correct probe reason bit)
1622 * because otherwise we would reset the timer every time and
1623 * never check whether we received a probe response!
1624 */
1625 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1626 IEEE80211_STA_CONNECTION_POLL))
1627 already = true;
1628
1629 if (beacon)
1630 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1631 else
1632 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1633
1634 if (already)
1635 goto out;
1636
4e751843
JB		 1637 mutex_lock(&sdata->local->iflist_mtx);
1638 ieee80211_recalc_ps(sdata->local, -1);
1639 mutex_unlock(&sdata->local->iflist_mtx);
1640
a43abf29
ML		 1641 ifmgd->probe_send_count = 0;
1642 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1643 out:
1644 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1645}
1646
a619a4c0
JO		 1647struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1648 struct ieee80211_vif *vif)
1649{
1650 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1651 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1652 struct sk_buff *skb;
1653 const u8 *ssid;
1654
1655 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1656 return NULL;
1657
1658 ASSERT_MGD_MTX(ifmgd);
1659
1660 if (!ifmgd->associated)
1661 return NULL;
1662
1663 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1664 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1665 (u32) -1, ssid + 2, ssid[1],
1666 NULL, 0, true);
a619a4c0
JO		 1667
1668 return skb;
1669}
1670EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1671
1e4dcd01
JO		 1672static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1673{
1674 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1675 struct ieee80211_local *local = sdata->local;
1676 u8 bssid[ETH_ALEN];
1677
1678 mutex_lock(&ifmgd->mtx);
1679 if (!ifmgd->associated) {
1680 mutex_unlock(&ifmgd->mtx);
1681 return;
1682 }
1683
1684 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1685
180205bd
BG		 1686 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1687 sdata->name, bssid);
1e4dcd01 1688
53f73c09 1689 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1690 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1691
1e4dcd01
JO		 1692 /*
1693 * must be outside lock due to cfg80211,
1694 * but that's not a problem.
1695 */
1696 ieee80211_send_deauth_disassoc(sdata, bssid,
1697 IEEE80211_STYPE_DEAUTH,
1698 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1699 NULL, true);
fcac4fb0
FF		 1700
1701 mutex_lock(&local->mtx);
1702 ieee80211_recalc_idle(local);
1703 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1704}
1705
1706void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1707{
1708 struct ieee80211_sub_if_data *sdata =
1709 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1710 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1711 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1712 struct sta_info *sta;
1713
1714 if (ifmgd->associated) {
30fa9047 1715 rcu_read_lock();
a85e1d55
PS		 1716 sta = sta_info_get(sdata, ifmgd->bssid);
1717 if (sta)
1718 sta->beacon_loss_count++;
30fa9047 1719 rcu_read_unlock();
a85e1d55 1720 }
b291ba11 1721
1e4dcd01
JO		 1722 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1723 __ieee80211_connection_loss(sdata);
1724 else
1725 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1726}
1727
04de8381
KV		 1728void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1729{
1730 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1731 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1732
b5878a2d
JB		 1733 trace_api_beacon_loss(sdata);
1734
1e4dcd01
JO		 1735 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1736 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1737}
1738EXPORT_SYMBOL(ieee80211_beacon_loss);
1739
1e4dcd01
JO		 1740void ieee80211_connection_loss(struct ieee80211_vif *vif)
1741{
1742 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1743 struct ieee80211_hw *hw = &sdata->local->hw;
1744
b5878a2d
JB		 1745 trace_api_connection_loss(sdata);
1746
1e4dcd01
JO		 1747 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1748 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1749}
1750EXPORT_SYMBOL(ieee80211_connection_loss);
1751
1752
66e67e41
JB		 1753static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1754 bool assoc)
1755{
1756 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1757
1758 lockdep_assert_held(&sdata->u.mgd.mtx);
1759
1760 if (auth_data->synced)
1761 drv_finish_tx_sync(sdata->local, sdata,
1762 auth_data->bss->bssid,
1763 IEEE80211_TX_SYNC_AUTH);
1764
1765 if (!assoc) {
1766 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1767
1768 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1769 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1770 }
1771
1772 cfg80211_put_bss(auth_data->bss);
1773 kfree(auth_data);
1774 sdata->u.mgd.auth_data = NULL;
1775}
1776
1777static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1778 struct ieee80211_mgmt *mgmt, size_t len)
1779{
1780 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1781 u8 *pos;
1782 struct ieee802_11_elems elems;
1783
1784 pos = mgmt->u.auth.variable;
1785 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1786 if (!elems.challenge)
1787 return;
1788 auth_data->expected_transaction = 4;
1789 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1790 elems.challenge - 2, elems.challenge_len + 2,
1791 auth_data->bss->bssid, auth_data->bss->bssid,
1792 auth_data->key, auth_data->key_len,
1793 auth_data->key_idx);
1794}
1795
1796static enum rx_mgmt_action __must_check
1797ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1798 struct ieee80211_mgmt *mgmt, size_t len)
1799{
1800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1801 u8 bssid[ETH_ALEN];
1802 u16 auth_alg, auth_transaction, status_code;
1803 struct sta_info *sta;
1804
1805 lockdep_assert_held(&ifmgd->mtx);
1806
1807 if (len < 24 + 6)
1808 return RX_MGMT_NONE;
1809
1810 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1811 return RX_MGMT_NONE;
1812
1813 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1814
1815 if (memcmp(bssid, mgmt->bssid, ETH_ALEN))
1816 return RX_MGMT_NONE;
1817
1818 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1819 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1820 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1821
1822 if (auth_alg != ifmgd->auth_data->algorithm ||
1823 auth_transaction != ifmgd->auth_data->expected_transaction)
1824 return RX_MGMT_NONE;
1825
1826 if (status_code != WLAN_STATUS_SUCCESS) {
1827 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1828 sdata->name, mgmt->sa, status_code);
1829 goto out;
1830 }
1831
1832 switch (ifmgd->auth_data->algorithm) {
1833 case WLAN_AUTH_OPEN:
1834 case WLAN_AUTH_LEAP:
1835 case WLAN_AUTH_FT:
1836 break;
1837 case WLAN_AUTH_SHARED_KEY:
1838 if (ifmgd->auth_data->expected_transaction != 4) {
1839 ieee80211_auth_challenge(sdata, mgmt, len);
1840 /* need another frame */
1841 return RX_MGMT_NONE;
1842 }
1843 break;
1844 default:
1845 WARN_ONCE(1, "invalid auth alg %d",
1846 ifmgd->auth_data->algorithm);
1847 return RX_MGMT_NONE;
1848 }
1849
1850 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1851 out:
1852 if (ifmgd->auth_data->synced)
1853 drv_finish_tx_sync(sdata->local, sdata, bssid,
1854 IEEE80211_TX_SYNC_AUTH);
1855 ifmgd->auth_data->synced = false;
1856 ifmgd->auth_data->done = true;
1857 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1858 run_again(ifmgd, ifmgd->auth_data->timeout);
1859
1860 /* move station state to auth */
1861 mutex_lock(&sdata->local->sta_mtx);
1862 sta = sta_info_get(sdata, bssid);
1863 if (!sta) {
1864 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1865 goto out_err;
1866 }
1867 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1868 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1869 sdata->name, bssid);
1870 goto out_err;
1871 }
1872 mutex_unlock(&sdata->local->sta_mtx);
1873
1874 return RX_MGMT_CFG80211_RX_AUTH;
1875 out_err:
1876 mutex_unlock(&sdata->local->sta_mtx);
1877 /* ignore frame -- wait for timeout */
1878 return RX_MGMT_NONE;
1879}
1880
1881
77fdaa12
JB		 1882static enum rx_mgmt_action __must_check
1883ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1884 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1885{
46900298 1886 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1887 const u8 *bssid = NULL;
f0706e82
JB		 1888 u16 reason_code;
1889
66e67e41
JB		 1890 lockdep_assert_held(&ifmgd->mtx);
1891
f4ea83dd 1892 if (len < 24 + 2)
77fdaa12 1893 return RX_MGMT_NONE;
f0706e82 1894
66e67e41
JB		 1895 if (!ifmgd->associated ||
1896 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
1897 return RX_MGMT_NONE;
77fdaa12 1898
0c1ad2ca 1899 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1900
1901 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1902
77fdaa12 1903 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1904 sdata->name, bssid, reason_code);
77fdaa12 1905
53f73c09 1906 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1907 mutex_lock(&sdata->local->mtx);
63f170e0 1908 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1909 mutex_unlock(&sdata->local->mtx);
f0706e82 1910
77fdaa12 1911 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1912}
1913
1914
77fdaa12
JB		 1915static enum rx_mgmt_action __must_check
1916ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1917 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1918{
46900298 1919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1920 u16 reason_code;
1921
66e67e41 1922 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1923
66e67e41 1924 if (len < 24 + 2)
77fdaa12
JB		 1925 return RX_MGMT_NONE;
1926
66e67e41
JB		 1927 if (!ifmgd->associated ||
1928 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
77fdaa12 1929 return RX_MGMT_NONE;
f0706e82
JB		 1930
1931 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1932
0ff71613 1933 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1934 sdata->name, mgmt->sa, reason_code);
f0706e82 1935
53f73c09 1936 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1937 mutex_lock(&sdata->local->mtx);
bc83b681 1938 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1939 mutex_unlock(&sdata->local->mtx);
77fdaa12 1940 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1941}
1942
c74d084f
CL		 1943static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1944 u8 *supp_rates, unsigned int supp_rates_len,
1945 u32 *rates, u32 *basic_rates,
1946 bool *have_higher_than_11mbit,
1947 int *min_rate, int *min_rate_index)
1948{
1949 int i, j;
1950
1951 for (i = 0; i < supp_rates_len; i++) {
1952 int rate = (supp_rates[i] & 0x7f) * 5;
1953 bool is_basic = !!(supp_rates[i] & 0x80);
1954
1955 if (rate > 110)
1956 *have_higher_than_11mbit = true;
1957
1958 /*
1959 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1960 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1961 *
1962 * Note: Even through the membership selector and the basic
1963 * rate flag share the same bit, they are not exactly
1964 * the same.
1965 */
1966 if (!!(supp_rates[i] & 0x80) &&
1967 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1968 continue;
1969
1970 for (j = 0; j < sband->n_bitrates; j++) {
1971 if (sband->bitrates[j].bitrate == rate) {
1972 *rates |= BIT(j);
1973 if (is_basic)
1974 *basic_rates |= BIT(j);
1975 if (rate < *min_rate) {
1976 *min_rate = rate;
1977 *min_rate_index = j;
1978 }
1979 break;
1980 }
1981 }
1982 }
1983}
f0706e82 1984
66e67e41
JB		 1985static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1986 bool assoc)
1987{
1988 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1989
1990 lockdep_assert_held(&sdata->u.mgd.mtx);
1991
1992 if (assoc_data->synced)
1993 drv_finish_tx_sync(sdata->local, sdata,
1994 assoc_data->bss->bssid,
1995 IEEE80211_TX_SYNC_ASSOC);
1996
1997 if (!assoc) {
1998 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1999
2000 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2001 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2002 }
2003
2004 kfree(assoc_data);
2005 sdata->u.mgd.assoc_data = NULL;
2006}
2007
2008static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2009 struct cfg80211_bss *cbss,
af6b6374 2010 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2011{
46900298 2012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2013 struct ieee80211_local *local = sdata->local;
8318d78a 2014 struct ieee80211_supported_band *sband;
f0706e82 2015 struct sta_info *sta;
af6b6374 2016 u8 *pos;
881d948c 2017 u32 rates, basic_rates;
af6b6374 2018 u16 capab_info, aid;
f0706e82 2019 struct ieee802_11_elems elems;
bda3933a 2020 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2021 u32 changed = 0;
c74d084f 2022 int err;
5d1ec85f 2023 bool have_higher_than_11mbit = false;
ae5eb026 2024 u16 ap_ht_cap_flags;
3432f923 2025 int min_rate = INT_MAX, min_rate_index = -1;
f0706e82 2026
af6b6374 2027 /* AssocResp and ReassocResp have identical structure */
f0706e82 2028
f0706e82 2029 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2030 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2031
1dd84aa2 2032 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 2033 printk(KERN_DEBUG
2034 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2035 sdata->name, aid);
1dd84aa2
JB		 2036 aid &= ~(BIT(15) | BIT(14));
2037
05cb9108
JB		 2038 ifmgd->broken_ap = false;
2039
2040 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2041 printk(KERN_DEBUG
2042 "%s: invalid AID value %d (out of range), turn off PS\n",
2043 sdata->name, aid);
2044 aid = 0;
2045 ifmgd->broken_ap = true;
2046 }
2047
af6b6374
JB		 2048 pos = mgmt->u.assoc_resp.variable;
2049 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2050
f0706e82
JB		 2051 if (!elems.supp_rates) {
2052 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 2053 sdata->name);
af6b6374 2054 return false;
f0706e82
JB		 2055 }
2056
46900298 2057 ifmgd->aid = aid;
f0706e82 2058
2a33bee2
GE		 2059 mutex_lock(&sdata->local->sta_mtx);
2060 /*
2061 * station info was already allocated and inserted before
2062 * the association and should be available to us
2063 */
7852e361 2064 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2065 if (WARN_ON(!sta)) {
2066 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2067 return false;
77fdaa12 2068 }
05e5e883 2069
60f8b39c
JB		 2070 rates = 0;
2071 basic_rates = 0;
66e67e41 2072 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2073
c74d084f
CL		 2074 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
2075 &rates, &basic_rates, &have_higher_than_11mbit,
2076 &min_rate, &min_rate_index);
f0706e82 2077
c74d084f
CL		 2078 ieee80211_get_rates(sband, elems.ext_supp_rates,
2079 elems.ext_supp_rates_len, &rates, &basic_rates,
2080 &have_higher_than_11mbit,
2081 &min_rate, &min_rate_index);
f0706e82 2082
3432f923
EP		 2083 /*
2084 * some buggy APs don't advertise basic_rates. use the lowest
2085 * supported rate instead.
2086 */
2087 if (unlikely(!basic_rates) && min_rate_index >= 0) {
2088 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
2089 "Using min supported rate instead.\n", sdata->name);
2090 basic_rates = BIT(min_rate_index);
2091 }
2092
66e67e41 2093 sta->sta.supp_rates[local->oper_channel->band] = rates;
bda3933a 2094 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 2095
2096 /* cf. IEEE 802.11 9.2.12 */
66e67e41 2097 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 2098 have_higher_than_11mbit)
2099 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2100 else
2101 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2102
ab1faead 2103 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2104 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2105 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 2106
2107 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 2108
4b7679a5 2109 rate_control_rate_init(sta);
f0706e82 2110
46900298 2111 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2112 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2113
ddf4ac53 2114 if (elems.wmm_param)
c2c98fde 2115 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2116
c8987876
JB		 2117 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2118 if (!err)
2119 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2120 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2121 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2122 if (err) {
2123 printk(KERN_DEBUG
2124 "%s: failed to move station %pM to desired state\n",
2125 sdata->name, sta->sta.addr);
2126 WARN_ON(__sta_info_destroy(sta));
2127 mutex_unlock(&sdata->local->sta_mtx);
2128 return false;
2129 }
2130
7852e361 2131 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2132
f2176d72
JO		 2133 /*
2134 * Always handle WMM once after association regardless
2135 * of the first value the AP uses. Setting -1 here has
2136 * that effect because the AP values is an unsigned
2137 * 4-bit value.
2138 */
2139 ifmgd->wmm_last_param_set = -1;
2140
ddf4ac53 2141 if (elems.wmm_param)
4ced3f74 2142 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2143 elems.wmm_param_len);
aa837e1d
JB		 2144 else
2145 ieee80211_set_wmm_default(sdata);
f0706e82 2146
ae5eb026 2147 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 2148 (sdata->local->hw.queues >= 4) &&
ab1faead 2149 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 2150 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 2151 cbss->bssid, ap_ht_cap_flags,
2152 false);
ae5eb026 2153
60f8b39c
JB		 2154 /* set AID and assoc capability,
2155 * ieee80211_set_associated() will tell the driver */
2156 bss_conf->aid = aid;
2157 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2158 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2159
d524215f
FF		 2160 /*
2161 * If we're using 4-addr mode, let the AP know that we're
2162 * doing so, so that it can create the STA VLAN on its side
2163 */
2164 if (ifmgd->use_4addr)
2165 ieee80211_send_4addr_nullfunc(local, sdata);
2166
15b7b062 2167 /*
b291ba11
JB		 2168 * Start timer to probe the connection to the AP now.
2169 * Also start the timer that will detect beacon loss.
15b7b062 2170 */
b291ba11 2171 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2172 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2173
af6b6374 2174 return true;
f0706e82
JB		 2175}
2176
66e67e41
JB		 2177static enum rx_mgmt_action __must_check
2178ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2179 struct ieee80211_mgmt *mgmt, size_t len,
2180 struct cfg80211_bss **bss)
2181{
2182 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2183 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2184 u16 capab_info, status_code, aid;
2185 struct ieee802_11_elems elems;
2186 u8 *pos;
2187 bool reassoc;
2188
2189 lockdep_assert_held(&ifmgd->mtx);
2190
2191 if (!assoc_data)
2192 return RX_MGMT_NONE;
2193 if (memcmp(assoc_data->bss->bssid, mgmt->bssid, ETH_ALEN))
2194 return RX_MGMT_NONE;
2195
2196 /*
2197 * AssocResp and ReassocResp have identical structure, so process both
2198 * of them in this function.
2199 */
2200
2201 if (len < 24 + 6)
2202 return RX_MGMT_NONE;
2203
2204 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2205 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2206 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2207 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2208
2209 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2210 "status=%d aid=%d)\n",
2211 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2212 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2213
2214 pos = mgmt->u.assoc_resp.variable;
2215 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2216
2217 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2218 elems.timeout_int && elems.timeout_int_len == 5 &&
2219 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2220 u32 tu, ms;
2221 tu = get_unaligned_le32(elems.timeout_int + 1);
2222 ms = tu * 1024 / 1000;
2223 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2224 "comeback duration %u TU (%u ms)\n",
2225 sdata->name, mgmt->sa, tu, ms);
2226 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2227 if (ms > IEEE80211_ASSOC_TIMEOUT)
2228 run_again(ifmgd, assoc_data->timeout);
2229 return RX_MGMT_NONE;
2230 }
2231
2232 *bss = assoc_data->bss;
2233
2234 if (status_code != WLAN_STATUS_SUCCESS) {
2235 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2236 sdata->name, mgmt->sa, status_code);
2237 ieee80211_destroy_assoc_data(sdata, false);
2238 } else {
2239 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2240
2241 ieee80211_destroy_assoc_data(sdata, true);
f0706e82 2242
66e67e41
JB		 2243 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2244 /* oops -- internal error -- send timeout for now */
2245 sta_info_destroy_addr(sdata, mgmt->bssid);
2246 cfg80211_put_bss(*bss);
2247 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2248 }
2249 }
2250
2251 return RX_MGMT_CFG80211_RX_ASSOC;
2252}
98c8fccf
JB		 2253static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2254 struct ieee80211_mgmt *mgmt,
2255 size_t len,
2256 struct ieee80211_rx_status *rx_status,
2257 struct ieee802_11_elems *elems,
2258 bool beacon)
2259{
2260 struct ieee80211_local *local = sdata->local;
2261 int freq;
c2b13452 2262 struct ieee80211_bss *bss;
98c8fccf 2263 struct ieee80211_channel *channel;
56007a02
JB		 2264 bool need_ps = false;
2265
66e67e41
JB		 2266 if (sdata->u.mgd.associated &&
2267 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2268 ETH_ALEN) == 0) {
56007a02
JB		 2269 bss = (void *)sdata->u.mgd.associated->priv;
2270 /* not previously set so we may need to recalc */
2271 need_ps = !bss->dtim_period;
2272 }
98c8fccf
JB		 2273
2274 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2275 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2276 rx_status->band);
98c8fccf
JB		 2277 else
2278 freq = rx_status->freq;
2279
2280 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2281
2282 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2283 return;
2284
98c8fccf 2285 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2286 channel, beacon);
77fdaa12
JB		 2287 if (bss)
2288 ieee80211_rx_bss_put(local, bss);
2289
2290 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2291 return;
2292
56007a02
JB		 2293 if (need_ps) {
2294 mutex_lock(&local->iflist_mtx);
2295 ieee80211_recalc_ps(local, -1);
2296 mutex_unlock(&local->iflist_mtx);
2297 }
2298
c481ec97 2299 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2300 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2301 ETH_ALEN) == 0)) {
c481ec97
S		 2302 struct ieee80211_channel_sw_ie *sw_elem =
2303 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2304 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2305 bss, rx_status->mactime);
c481ec97 2306 }
f0706e82
JB		 2307}
2308
2309
f698d856 2310static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2311 struct sk_buff *skb)
f0706e82 2312{
af6b6374 2313 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2314 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2315 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2316 size_t baselen, len = skb->len;
ae6a44e3
EK		 2317 struct ieee802_11_elems elems;
2318
15b7b062
KV		 2319 ifmgd = &sdata->u.mgd;
2320
77fdaa12
JB		 2321 ASSERT_MGD_MTX(ifmgd);
2322
47846c9b 2323 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 2324 return; /* ignore ProbeResp to foreign address */
2325
ae6a44e3
EK		 2326 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2327 if (baselen > len)
2328 return;
2329
2330 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2331 &elems);
2332
98c8fccf 2333 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2334
77fdaa12 2335 if (ifmgd->associated &&
4e5ff376
FF		 2336 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
2337 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2338
2339 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2340 memcmp(mgmt->bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN) == 0) {
2341 /* got probe response, continue with auth */
2342 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2343 ifmgd->auth_data->tries = 0;
2344 ifmgd->auth_data->timeout = jiffies;
2345 run_again(ifmgd, ifmgd->auth_data->timeout);
2346 }
f0706e82
JB		 2347}
2348
d91f36db
JB		 2349/*
2350 * This is the canonical list of information elements we care about,
2351 * the filter code also gives us all changes to the Microsoft OUI
2352 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2353 *
2354 * We implement beacon filtering in software since that means we can
2355 * avoid processing the frame here and in cfg80211, and userspace
2356 * will not be able to tell whether the hardware supports it or not.
2357 *
2358 * XXX: This list needs to be dynamic -- userspace needs to be able to
2359 * add items it requires. It also needs to be able to tell us to
2360 * look out for other vendor IEs.
2361 */
2362static const u64 care_about_ies =
1d4df3a5
JB		 2363 (1ULL << WLAN_EID_COUNTRY) |
2364 (1ULL << WLAN_EID_ERP_INFO) |
2365 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2366 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2367 (1ULL << WLAN_EID_HT_CAPABILITY) |
2368 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 2369
f698d856 2370static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2371 struct ieee80211_mgmt *mgmt,
2372 size_t len,
2373 struct ieee80211_rx_status *rx_status)
2374{
d91f36db 2375 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2376 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2377 size_t baselen;
2378 struct ieee802_11_elems elems;
f698d856 2379 struct ieee80211_local *local = sdata->local;
471b3efd 2380 u32 changed = 0;
d91f36db 2381 bool erp_valid, directed_tim = false;
7a5158ef 2382 u8 erp_value = 0;
d91f36db 2383 u32 ncrc;
77fdaa12
JB		 2384 u8 *bssid;
2385
66e67e41 2386 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2387
ae6a44e3
EK		 2388 /* Process beacon from the current BSS */
2389 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2390 if (baselen > len)
2391 return;
2392
d91f36db 2393 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2394 return;
f0706e82 2395
66e67e41
JB		 2396 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2397 memcmp(mgmt->bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN) == 0) {
2398 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2399 len - baselen, &elems);
77fdaa12 2400
66e67e41
JB		 2401 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2402 false);
2403 ifmgd->assoc_data->have_beacon = true;
2404 ifmgd->assoc_data->sent_assoc = false;
2405 /* continue assoc process */
2406 ifmgd->assoc_data->timeout = jiffies;
2407 run_again(ifmgd, ifmgd->assoc_data->timeout);
2408 return;
2409 }
77fdaa12 2410
66e67e41
JB		 2411 if (!ifmgd->associated ||
2412 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
f0706e82 2413 return;
66e67e41 2414 bssid = ifmgd->associated->bssid;
f0706e82 2415
17e4ec14
JM		 2416 /* Track average RSSI from the Beacon frames of the current AP */
2417 ifmgd->last_beacon_signal = rx_status->signal;
2418 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2419 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2420 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2421 ifmgd->last_cqm_event_signal = 0;
391a200a 2422 ifmgd->count_beacon_signal = 1;
615f7b9b 2423 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2424 } else {
2425 ifmgd->ave_beacon_signal =
2426 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2427 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2428 ifmgd->ave_beacon_signal) / 16;
391a200a 2429 ifmgd->count_beacon_signal++;
17e4ec14 2430 }
615f7b9b
MV		 2431
2432 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2433 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2434 int sig = ifmgd->ave_beacon_signal;
2435 int last_sig = ifmgd->last_ave_beacon_signal;
2436
2437 /*
2438 * if signal crosses either of the boundaries, invoke callback
2439 * with appropriate parameters
2440 */
2441 if (sig > ifmgd->rssi_max_thold &&
2442 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2443 ifmgd->last_ave_beacon_signal = sig;
2444 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2445 } else if (sig < ifmgd->rssi_min_thold &&
2446 (last_sig >= ifmgd->rssi_max_thold ||
2447 last_sig == 0)) {
2448 ifmgd->last_ave_beacon_signal = sig;
2449 drv_rssi_callback(local, RSSI_EVENT_LOW);
2450 }
2451 }
2452
17e4ec14 2453 if (bss_conf->cqm_rssi_thold &&
391a200a 2454 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2455 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2456 int sig = ifmgd->ave_beacon_signal / 16;
2457 int last_event = ifmgd->last_cqm_event_signal;
2458 int thold = bss_conf->cqm_rssi_thold;
2459 int hyst = bss_conf->cqm_rssi_hyst;
2460 if (sig < thold &&
2461 (last_event == 0 || sig < last_event - hyst)) {
2462 ifmgd->last_cqm_event_signal = sig;
2463 ieee80211_cqm_rssi_notify(
2464 &sdata->vif,
2465 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2466 GFP_KERNEL);
2467 } else if (sig > thold &&
2468 (last_event == 0 || sig > last_event + hyst)) {
2469 ifmgd->last_cqm_event_signal = sig;
2470 ieee80211_cqm_rssi_notify(
2471 &sdata->vif,
2472 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2473 GFP_KERNEL);
2474 }
2475 }
2476
b291ba11 2477 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 2478#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2479 if (net_ratelimit()) {
2480 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 2481 "to a received beacon\n", sdata->name);
92778180
JM		 2482 }
2483#endif
b291ba11 2484 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2485 mutex_lock(&local->iflist_mtx);
2486 ieee80211_recalc_ps(local, -1);
2487 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2488 }
2489
b291ba11
JB		 2490 /*
2491 * Push the beacon loss detection into the future since
2492 * we are processing a beacon from the AP just now.
2493 */
d3a910a8 2494 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2495
d91f36db
JB		 2496 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2497 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2498 len - baselen, &elems,
2499 care_about_ies, ncrc);
2500
2501 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2502 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2503 ifmgd->aid);
d91f36db 2504
d8ec4433 2505 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2506 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2507 true);
d91f36db 2508
4ced3f74 2509 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2510 elems.wmm_param_len);
2511 }
fe3fa827 2512
25c9c875 2513 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2514 if (directed_tim) {
572e0012
KV		 2515 if (local->hw.conf.dynamic_ps_timeout > 0) {
2516 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2517 ieee80211_hw_config(local,
2518 IEEE80211_CONF_CHANGE_PS);
2519 ieee80211_send_nullfunc(local, sdata, 0);
2520 } else {
2521 local->pspolling = true;
2522
2523 /*
2524 * Here is assumed that the driver will be
2525 * able to send ps-poll frame and receive a
2526 * response even though power save mode is
2527 * enabled, but some drivers might require
2528 * to disable power save here. This needs
2529 * to be investigated.
2530 */
2531 ieee80211_send_pspoll(local, sdata);
2532 }
a97b77b9
VN		 2533 }
2534 }
7a5158ef 2535
d8ec4433 2536 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2537 return;
2538 ifmgd->beacon_crc = ncrc;
d8ec4433 2539 ifmgd->beacon_crc_valid = true;
30196673 2540
7a5158ef
JB		 2541 if (elems.erp_info && elems.erp_info_len >= 1) {
2542 erp_valid = true;
2543 erp_value = elems.erp_info[0];
2544 } else {
2545 erp_valid = false;
50c4afb9 2546 }
7a5158ef
JB		 2547 changed |= ieee80211_handle_bss_capability(sdata,
2548 le16_to_cpu(mgmt->u.beacon.capab_info),
2549 erp_valid, erp_value);
f0706e82 2550
d3c990fb 2551
53d6f81c 2552 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 2553 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 2554 struct sta_info *sta;
2555 struct ieee80211_supported_band *sband;
2556 u16 ap_ht_cap_flags;
2557
2558 rcu_read_lock();
2559
abe60632 2560 sta = sta_info_get(sdata, bssid);
77fdaa12 2561 if (WARN_ON(!sta)) {
ae5eb026
JB		 2562 rcu_read_unlock();
2563 return;
2564 }
2565
2566 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2567
ef96a842 2568 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
ae5eb026
JB		 2569 elems.ht_cap_elem, &sta->sta.ht_cap);
2570
2571 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2572
2573 rcu_read_unlock();
2574
2575 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 2576 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 2577 }
2578
8b19e6ca 2579 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2580 if (elems.country_elem) {
a8302de9
VT		 2581 /* TODO: IBSS also needs this */
2582 if (elems.pwr_constr_elem)
2583 ieee80211_handle_pwr_constr(sdata,
2584 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2585 elems.pwr_constr_elem,
2586 elems.pwr_constr_elem_len);
3f2355cb
LR		 2587 }
2588
471b3efd 2589 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2590}
2591
1fa57d01
JB		 2592void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2593 struct sk_buff *skb)
f0706e82 2594{
77fdaa12 2595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2596 struct ieee80211_rx_status *rx_status;
f0706e82 2597 struct ieee80211_mgmt *mgmt;
66e67e41 2598 struct cfg80211_bss *bss = NULL;
77fdaa12 2599 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2600 u16 fc;
2601
f0706e82
JB		 2602 rx_status = (struct ieee80211_rx_status *) skb->cb;
2603 mgmt = (struct ieee80211_mgmt *) skb->data;
2604 fc = le16_to_cpu(mgmt->frame_control);
2605
77fdaa12
JB		 2606 mutex_lock(&ifmgd->mtx);
2607
66e67e41
JB		 2608 switch (fc & IEEE80211_FCTL_STYPE) {
2609 case IEEE80211_STYPE_BEACON:
2610 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2611 break;
2612 case IEEE80211_STYPE_PROBE_RESP:
2613 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2614 break;
2615 case IEEE80211_STYPE_AUTH:
2616 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2617 break;
2618 case IEEE80211_STYPE_DEAUTH:
2619 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2620 break;
2621 case IEEE80211_STYPE_DISASSOC:
2622 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2623 break;
2624 case IEEE80211_STYPE_ASSOC_RESP:
2625 case IEEE80211_STYPE_REASSOC_RESP:
2626 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2627 break;
2628 case IEEE80211_STYPE_ACTION:
2629 switch (mgmt->u.action.category) {
2630 case WLAN_CATEGORY_SPECTRUM_MGMT:
2631 ieee80211_sta_process_chanswitch(sdata,
2632 &mgmt->u.action.u.chan_switch.sw_elem,
2633 (void *)ifmgd->associated->priv,
2634 rx_status->mactime);
77fdaa12 2635 break;
77fdaa12 2636 }
77fdaa12 2637 }
77fdaa12
JB		 2638 mutex_unlock(&ifmgd->mtx);
2639
66e67e41
JB		 2640 switch (rma) {
2641 case RX_MGMT_NONE:
2642 /* no action */
2643 break;
2644 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2645 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2646 break;
2647 case RX_MGMT_CFG80211_DISASSOC:
2648 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2649 break;
2650 case RX_MGMT_CFG80211_RX_AUTH:
2651 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2652 break;
2653 case RX_MGMT_CFG80211_RX_ASSOC:
2654 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2655 break;
2656 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2657 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2658 break;
2659 default:
2660 WARN(1, "unexpected: %d", rma);
b054b747 2661 }
f0706e82
JB		 2662}
2663
9c6bd790 2664static void ieee80211_sta_timer(unsigned long data)
f0706e82 2665{
60f8b39c
JB		 2666 struct ieee80211_sub_if_data *sdata =
2667 (struct ieee80211_sub_if_data *) data;
46900298 2668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2669 struct ieee80211_local *local = sdata->local;
f0706e82 2670
5bb644a0
JB		 2671 if (local->quiescing) {
2672 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2673 return;
2674 }
2675
64592c8f 2676 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2677}
2678
04ac3c0e 2679static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2680 u8 *bssid, u8 reason)
04ac3c0e
FF		 2681{
2682 struct ieee80211_local *local = sdata->local;
2683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2684
2685 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2686 IEEE80211_STA_BEACON_POLL);
2687
2688 ieee80211_set_disassoc(sdata, true, true);
2689 mutex_unlock(&ifmgd->mtx);
04ac3c0e
FF		 2690 /*
2691 * must be outside lock due to cfg80211,
2692 * but that's not a problem.
2693 */
2694 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2695 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e 2696 NULL, true);
fcac4fb0
FF		 2697
2698 mutex_lock(&local->mtx);
2699 ieee80211_recalc_idle(local);
2700 mutex_unlock(&local->mtx);
2701
04ac3c0e
FF		 2702 mutex_lock(&ifmgd->mtx);
2703}
2704
66e67e41
JB		 2705static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2706{
2707 struct ieee80211_local *local = sdata->local;
2708 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2709 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2710
2711 lockdep_assert_held(&ifmgd->mtx);
2712
2713 if (WARN_ON_ONCE(!auth_data))
2714 return -EINVAL;
2715
2716 if (!auth_data->synced) {
2717 int ret = drv_tx_sync(local, sdata, auth_data->bss->bssid,
2718 IEEE80211_TX_SYNC_AUTH);
2719 if (ret)
2720 return ret;
2721 }
2722 auth_data->synced = true;
2723
2724 auth_data->tries++;
2725
2726 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2727 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2728 sdata->name, auth_data->bss->bssid);
2729
2730 /*
2731 * Most likely AP is not in the range so remove the
2732 * bss struct for that AP.
2733 */
2734 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2735
2736 return -ETIMEDOUT;
2737 }
2738
2739 if (auth_data->bss->proberesp_ies) {
2740 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2741 sdata->name, auth_data->bss->bssid, auth_data->tries,
2742 IEEE80211_AUTH_MAX_TRIES);
2743
2744 auth_data->expected_transaction = 2;
2745 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2746 auth_data->ie, auth_data->ie_len,
2747 auth_data->bss->bssid,
2748 auth_data->bss->bssid, NULL, 0, 0);
2749 } else {
2750 const u8 *ssidie;
2751
2752 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2753 sdata->name, auth_data->bss->bssid, auth_data->tries,
2754 IEEE80211_AUTH_MAX_TRIES);
2755
2756 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2757 if (!ssidie)
2758 return -EINVAL;
2759 /*
2760 * Direct probe is sent to broadcast address as some APs
2761 * will not answer to direct packet in unassociated state.
2762 */
2763 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2764 NULL, 0, (u32) -1, true, false);
2765 }
2766
2767 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2768 run_again(ifmgd, auth_data->timeout);
2769
2770 return 0;
2771}
2772
2773static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2774{
2775 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2776 struct ieee80211_local *local = sdata->local;
2777
2778 lockdep_assert_held(&sdata->u.mgd.mtx);
2779
2780 if (!assoc_data->synced) {
2781 int ret = drv_tx_sync(local, sdata, assoc_data->bss->bssid,
2782 IEEE80211_TX_SYNC_ASSOC);
2783 if (ret)
2784 return ret;
2785 }
2786 assoc_data->synced = true;
2787
2788 assoc_data->tries++;
2789 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2790 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2791 sdata->name, assoc_data->bss->bssid);
2792
2793 /*
2794 * Most likely AP is not in the range so remove the
2795 * bss struct for that AP.
2796 */
2797 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2798
2799 return -ETIMEDOUT;
2800 }
2801
2802 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2803 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2804 IEEE80211_ASSOC_MAX_TRIES);
2805 ieee80211_send_assoc(sdata);
2806
2807 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2808 run_again(&sdata->u.mgd, assoc_data->timeout);
2809
2810 return 0;
2811}
2812
1fa57d01 2813void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2814{
9c6bd790 2815 struct ieee80211_local *local = sdata->local;
1fa57d01 2816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2817
77fdaa12
JB		 2818 mutex_lock(&ifmgd->mtx);
2819
66e67e41
JB		 2820 if (ifmgd->auth_data &&
2821 time_after(jiffies, ifmgd->auth_data->timeout)) {
2822 if (ifmgd->auth_data->done) {
2823 /*
2824 * ok ... we waited for assoc but userspace didn't,
2825 * so let's just kill the auth data
2826 */
2827 ieee80211_destroy_auth_data(sdata, false);
2828 } else if (ieee80211_probe_auth(sdata)) {
2829 u8 bssid[ETH_ALEN];
2830
2831 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2832
2833 ieee80211_destroy_auth_data(sdata, false);
2834
2835 mutex_unlock(&ifmgd->mtx);
2836 cfg80211_send_auth_timeout(sdata->dev, bssid);
2837 mutex_lock(&ifmgd->mtx);
2838 }
2839 } else if (ifmgd->auth_data)
2840 run_again(ifmgd, ifmgd->auth_data->timeout);
2841
2842 if (ifmgd->assoc_data &&
2843 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2844 if (!ifmgd->assoc_data->have_beacon ||
2845 ieee80211_do_assoc(sdata)) {
2846 u8 bssid[ETH_ALEN];
2847
2848 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2849
2850 ieee80211_destroy_assoc_data(sdata, false);
2851
2852 mutex_unlock(&ifmgd->mtx);
2853 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2854 mutex_lock(&ifmgd->mtx);
2855 }
2856 } else if (ifmgd->assoc_data)
2857 run_again(ifmgd, ifmgd->assoc_data->timeout);
2858
b291ba11
JB		 2859 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2860 IEEE80211_STA_CONNECTION_POLL) &&
2861 ifmgd->associated) {
a43abf29 2862 u8 bssid[ETH_ALEN];
72a8a3ed 2863 int max_tries;
a43abf29 2864
0c1ad2ca 2865 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2866
72a8a3ed 2867 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2868 max_tries = max_nullfunc_tries;
72a8a3ed 2869 else
180205bd 2870 max_tries = max_probe_tries;
72a8a3ed 2871
4e5ff376
FF		 2872 /* ACK received for nullfunc probing frame */
2873 if (!ifmgd->probe_send_count)
2874 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2875 else if (ifmgd->nullfunc_failed) {
2876 if (ifmgd->probe_send_count < max_tries) {
2877#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2878 wiphy_debug(local->hw.wiphy,
2879 "%s: No ack for nullfunc frame to"
bfc31df3 2880 " AP %pM, try %d/%i\n",
04ac3c0e 2881 sdata->name, bssid,
bfc31df3 2882 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2883#endif
2884 ieee80211_mgd_probe_ap_send(sdata);
2885 } else {
2886#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2887 wiphy_debug(local->hw.wiphy,
2888 "%s: No ack for nullfunc frame to"
2889 " AP %pM, disconnecting.\n",
c658e5db 2890 sdata->name, bssid);
04ac3c0e 2891#endif
95acac61
JB		 2892 ieee80211_sta_connection_lost(sdata, bssid,
2893 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2894 }
2895 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2896 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2897 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2898#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2899 wiphy_debug(local->hw.wiphy,
2900 "%s: Failed to send nullfunc to AP %pM"
2901 " after %dms, disconnecting.\n",
2902 sdata->name,
180205bd 2903 bssid, probe_wait_ms);
04ac3c0e 2904#endif
95acac61
JB		 2905 ieee80211_sta_connection_lost(sdata, bssid,
2906 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2907 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2908#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2909 wiphy_debug(local->hw.wiphy,
2910 "%s: No probe response from AP %pM"
bfc31df3 2911 " after %dms, try %d/%i\n",
b38afa87 2912 sdata->name,
180205bd 2913 bssid, probe_wait_ms,
bfc31df3 2914 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2915#endif
2916 ieee80211_mgd_probe_ap_send(sdata);
2917 } else {
b291ba11
JB		 2918 /*
2919 * We actually lost the connection ... or did we?
2920 * Let's make sure!
2921 */
b38afa87
BG		 2922 wiphy_debug(local->hw.wiphy,
2923 "%s: No probe response from AP %pM"
2924 " after %dms, disconnecting.\n",
2925 sdata->name,
180205bd 2926 bssid, probe_wait_ms);
04ac3c0e 2927
95acac61
JB		 2928 ieee80211_sta_connection_lost(sdata, bssid,
2929 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2930 }
2931 }
2932
77fdaa12 2933 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2934
2935 mutex_lock(&local->mtx);
2936 ieee80211_recalc_idle(local);
2937 mutex_unlock(&local->mtx);
f0706e82
JB		 2938}
2939
b291ba11
JB		 2940static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2941{
2942 struct ieee80211_sub_if_data *sdata =
2943 (struct ieee80211_sub_if_data *) data;
2944 struct ieee80211_local *local = sdata->local;
2945
2946 if (local->quiescing)
2947 return;
2948
1e4dcd01
JO		 2949 ieee80211_queue_work(&sdata->local->hw,
2950 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2951}
2952
2953static void ieee80211_sta_conn_mon_timer(unsigned long data)
2954{
2955 struct ieee80211_sub_if_data *sdata =
2956 (struct ieee80211_sub_if_data *) data;
2957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2958 struct ieee80211_local *local = sdata->local;
2959
2960 if (local->quiescing)
2961 return;
2962
42935eca 2963 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2964}
2965
2966static void ieee80211_sta_monitor_work(struct work_struct *work)
2967{
2968 struct ieee80211_sub_if_data *sdata =
2969 container_of(work, struct ieee80211_sub_if_data,
2970 u.mgd.monitor_work);
2971
2972 ieee80211_mgd_probe_ap(sdata, false);
2973}
2974
9c6bd790
JB		 2975static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2976{
ad935687 2977 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2978 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2979 IEEE80211_STA_CONNECTION_POLL);
ad935687 2980
b291ba11 2981 /* let's probe the connection once */
42935eca 2982 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2983 &sdata->u.mgd.monitor_work);
2984 /* and do all the other regular work too */
64592c8f 2985 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2986 }
9c6bd790 2987}
f0706e82 2988
5bb644a0
JB		 2989#ifdef CONFIG_PM
2990void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2991{
2992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2993
2994 /*
2995 * we need to use atomic bitops for the running bits
2996 * only because both timers might fire at the same
2997 * time -- the code here is properly synchronised.
2998 */
2999
d1f5b7a3
JB		 3000 cancel_work_sync(&ifmgd->request_smps_work);
3001
0ecfe806 3002 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3003 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 3004 if (del_timer_sync(&ifmgd->timer))
3005 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3006
3007 cancel_work_sync(&ifmgd->chswitch_work);
3008 if (del_timer_sync(&ifmgd->chswitch_timer))
3009 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3010
b291ba11
JB		 3011 /* these will just be re-established on connection */
3012 del_timer_sync(&ifmgd->conn_mon_timer);
3013 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3014}
3015
3016void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3017{
3018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3019
676b58c2
RM		 3020 if (!ifmgd->associated)
3021 return;
3022
95acac61
JB		 3023 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3024 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3025 mutex_lock(&ifmgd->mtx);
3026 if (ifmgd->associated) {
3027#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
3028 wiphy_debug(sdata->local->hw.wiphy,
3029 "%s: driver requested disconnect after resume.\n",
3030 sdata->name);
3031#endif
3032 ieee80211_sta_connection_lost(sdata,
3033 ifmgd->associated->bssid,
3034 WLAN_REASON_UNSPECIFIED);
3035 mutex_unlock(&ifmgd->mtx);
3036 return;
3037 }
3038 mutex_unlock(&ifmgd->mtx);
3039 }
3040
5bb644a0
JB		 3041 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3042 add_timer(&ifmgd->timer);
3043 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3044 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3045 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 3046 ieee80211_restart_sta_timer(sdata);
a6af1d84 3047 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 3048}
3049#endif
3050
9c6bd790
JB		 3051/* interface setup */
3052void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3053{
46900298 3054 struct ieee80211_if_managed *ifmgd;
988c0f72 3055
46900298 3056 ifmgd = &sdata->u.mgd;
b291ba11 3057 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3058 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3059 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3060 ieee80211_beacon_connection_loss_work);
d1f5b7a3 3061 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3062 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3063 (unsigned long) sdata);
b291ba11
JB		 3064 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3065 (unsigned long) sdata);
3066 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3067 (unsigned long) sdata);
46900298 3068 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3069 (unsigned long) sdata);
9c6bd790 3070
ab1faead 3071 ifmgd->flags = 0;
1478acb3 3072 ifmgd->powersave = sdata->wdev.ps;
bbbdff9e 3073
77fdaa12 3074 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3075
3076 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3077 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3078 else
3079 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3080}
3081
77fdaa12
JB		 3082/* scan finished notification */
3083void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3084{
77fdaa12 3085 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 3086
77fdaa12
JB		 3087 /* Restart STA timers */
3088 rcu_read_lock();
3089 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3090 ieee80211_restart_sta_timer(sdata);
3091 rcu_read_unlock();
3092}
60f8b39c 3093
77fdaa12
JB		 3094int ieee80211_max_network_latency(struct notifier_block *nb,
3095 unsigned long data, void *dummy)
3096{
3097 s32 latency_usec = (s32) data;
3098 struct ieee80211_local *local =
3099 container_of(nb, struct ieee80211_local,
3100 network_latency_notifier);
1fa6f4af 3101
77fdaa12
JB		 3102 mutex_lock(&local->iflist_mtx);
3103 ieee80211_recalc_ps(local, latency_usec);
3104 mutex_unlock(&local->iflist_mtx);
dfe67012 3105
77fdaa12 3106 return 0;
9c6bd790
JB		 3107}
3108
77fdaa12
JB		 3109/* config hooks */
3110int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3111 struct cfg80211_auth_request *req)
9c6bd790 3112{
66e67e41
JB		 3113 struct ieee80211_local *local = sdata->local;
3114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3115 struct ieee80211_mgd_auth_data *auth_data;
3116 struct sta_info *sta;
77fdaa12 3117 u16 auth_alg;
66e67e41
JB		 3118 int err;
3119
3120 /* prepare auth data structure */
9c6bd790 3121
77fdaa12
JB		 3122 switch (req->auth_type) {
3123 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3124 auth_alg = WLAN_AUTH_OPEN;
3125 break;
3126 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3127 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3128 return -EOPNOTSUPP;
77fdaa12
JB		 3129 auth_alg = WLAN_AUTH_SHARED_KEY;
3130 break;
3131 case NL80211_AUTHTYPE_FT:
3132 auth_alg = WLAN_AUTH_FT;
3133 break;
3134 case NL80211_AUTHTYPE_NETWORK_EAP:
3135 auth_alg = WLAN_AUTH_LEAP;
3136 break;
3137 default:
3138 return -EOPNOTSUPP;
60f8b39c 3139 }
77fdaa12 3140
66e67e41
JB		 3141 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3142 if (!auth_data)
9c6bd790 3143 return -ENOMEM;
77fdaa12 3144
66e67e41 3145 auth_data->bss = req->bss;
77fdaa12
JB		 3146
3147 if (req->ie && req->ie_len) {
66e67e41
JB		 3148 memcpy(auth_data->ie, req->ie, req->ie_len);
3149 auth_data->ie_len = req->ie_len;
9c6bd790 3150 }
77fdaa12 3151
fffd0934 3152 if (req->key && req->key_len) {
66e67e41
JB		 3153 auth_data->key_len = req->key_len;
3154 auth_data->key_idx = req->key_idx;
3155 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3156 }
3157
66e67e41 3158 auth_data->algorithm = auth_alg;
60f8b39c 3159
66e67e41 3160 /* try to authenticate/probe */
2a33bee2 3161
66e67e41 3162 mutex_lock(&ifmgd->mtx);
2a33bee2 3163
66e67e41
JB		 3164 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3165 ifmgd->assoc_data) {
3166 err = -EBUSY;
3167 goto err_free;
2a33bee2
GE		 3168 }
3169
66e67e41
JB		 3170 if (ifmgd->auth_data)
3171 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3172
66e67e41
JB		 3173 /* prep auth_data so we don't go into idle on disassoc */
3174 ifmgd->auth_data = auth_data;
af6b6374 3175
66e67e41
JB		 3176 if (ifmgd->associated)
3177 ieee80211_set_disassoc(sdata, true, false);
af6b6374 3178
66e67e41
JB		 3179 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3180 sdata->name, req->bss->bssid);
e5b900d2 3181
66e67e41
JB		 3182 mutex_lock(&local->mtx);
3183 ieee80211_recalc_idle(sdata->local);
3184 mutex_unlock(&local->mtx);
e5b900d2 3185
66e67e41
JB		 3186 /* switch to the right channel */
3187 local->oper_channel = req->bss->channel;
3188 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
af6b6374 3189
66e67e41
JB		 3190 /* set BSSID */
3191 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3192 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
b2abb6e2 3193
66e67e41
JB		 3194 /* add station entry */
3195 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3196 if (!sta) {
3197 err = -ENOMEM;
3198 goto err_clear;
3199 }
68542962 3200
66e67e41
JB		 3201 err = sta_info_insert(sta);
3202 if (err) {
3203 printk(KERN_DEBUG
3204 "%s: failed to insert STA entry for the AP %pM (error %d)\n",
3205 sdata->name, req->bss->bssid, err);
3206 goto err_clear;
af6b6374
JB		 3207 }
3208
66e67e41
JB		 3209 err = ieee80211_probe_auth(sdata);
3210 if (err) {
3211 if (auth_data->synced)
3212 drv_finish_tx_sync(local, sdata, req->bss->bssid,
3213 IEEE80211_TX_SYNC_AUTH);
3214 sta_info_destroy_addr(sdata, req->bss->bssid);
3215 goto err_clear;
3216 }
3217
3218 /* hold our own reference */
3219 cfg80211_ref_bss(auth_data->bss);
3220 err = 0;
3221 goto out_unlock;
3222
3223 err_clear:
3224 ifmgd->auth_data = NULL;
3225 err_free:
3226 kfree(auth_data);
3227 out_unlock:
3228 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3229
66e67e41 3230 return err;
af6b6374
JB		 3231}
3232
77fdaa12
JB		 3233int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3234 struct cfg80211_assoc_request *req)
f0706e82 3235{
66e67e41 3236 struct ieee80211_local *local = sdata->local;
77fdaa12 3237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3238 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41
JB		 3239 struct ieee80211_mgd_assoc_data *assoc_data;
3240 struct sta_info *sta;
3241 const u8 *ssidie;
2a33bee2 3242 int i, err;
f0706e82 3243
66e67e41
JB		 3244 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3245 if (!ssidie)
3246 return -EINVAL;
3247
3248 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3249 if (!assoc_data)
3250 return -ENOMEM;
3251
77fdaa12 3252 mutex_lock(&ifmgd->mtx);
9c87ba67 3253
66e67e41 3254 if (ifmgd->associated)
53f73c09 3255 ieee80211_set_disassoc(sdata, true, false);
66e67e41
JB		 3256
3257 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3258 err = -EBUSY;
3259 goto err_free;
af6b6374 3260 }
77fdaa12 3261
66e67e41
JB		 3262 if (ifmgd->assoc_data) {
3263 err = -EBUSY;
3264 goto err_free;
3265 }
77fdaa12 3266
66e67e41
JB		 3267 if (ifmgd->auth_data) {
3268 bool match;
3269
3270 /* keep sta info, bssid if matching */
3271 match = memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN) == 0;
3272 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3273 }
3274
66e67e41
JB		 3275 /* prepare assoc data */
3276
77fdaa12 3277 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3278 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3279
d8ec4433
JO		 3280 ifmgd->beacon_crc_valid = false;
3281
77fdaa12
JB		 3282 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3283 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3284 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3285 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3286 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3287
ef96a842
BG		 3288 if (req->flags & ASSOC_REQ_DISABLE_HT)
3289 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3290
3291 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3292 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3293 sizeof(ifmgd->ht_capa_mask));
3294
77fdaa12 3295 if (req->ie && req->ie_len) {
66e67e41
JB		 3296 memcpy(assoc_data->ie, req->ie, req->ie_len);
3297 assoc_data->ie_len = req->ie_len;
3298 }
f679f65d 3299
66e67e41 3300 assoc_data->bss = req->bss;
f679f65d 3301
af6b6374
JB		 3302 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3303 if (ifmgd->powersave)
3304 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3305 else
3306 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3307 } else
3308 ifmgd->ap_smps = ifmgd->req_smps;
3309
77c8144a
JB		 3310 /*
3311 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3312 * We still associate in non-HT mode (11a/b/g) if any one of these
3313 * ciphers is configured as pairwise.
3314 * We can set this to true for non-11n hardware, that'll be checked
3315 * separately along with the peer capabilities.
3316 */
66e67e41
JB		 3317 assoc_data->capability = req->bss->capability;
3318 assoc_data->wmm_used = bss->wmm_used;
3319 assoc_data->supp_rates = bss->supp_rates;
3320 assoc_data->supp_rates_len = bss->supp_rates_len;
3321 assoc_data->ht_information_ie =
f679f65d 3322 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 3323
ab13315a
KV		 3324 if (bss->wmm_used && bss->uapsd_supported &&
3325 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
66e67e41 3326 assoc_data->uapsd_used = true;
ab13315a
KV		 3327 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3328 } else {
66e67e41 3329 assoc_data->uapsd_used = false;
ab13315a
KV		 3330 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3331 }
3332
66e67e41
JB		 3333 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3334 assoc_data->ssid_len = ssidie[1];
63f170e0 3335
77fdaa12 3336 if (req->prev_bssid)
66e67e41 3337 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3338
3339 if (req->use_mfp) {
3340 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3341 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3342 } else {
3343 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3344 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3345 }
3346
3347 if (req->crypto.control_port)
3348 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3349 else
3350 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3351
a621fa4d
JB		 3352 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3353 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3354
66e67e41
JB		 3355 /* kick off associate process */
3356
3357 ifmgd->assoc_data = assoc_data;
3358
3359 mutex_lock(&local->mtx);
3360 ieee80211_recalc_idle(sdata->local);
3361 mutex_unlock(&local->mtx);
3362
3363 /* switch to the right channel */
3364 local->oper_channel = req->bss->channel;
3365 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3366
3367 rcu_read_lock();
3368 sta = sta_info_get(sdata, req->bss->bssid);
3369 rcu_read_unlock();
3370
3371 if (!sta) {
3372 /* set BSSID */
3373 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3374 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3375
3376 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3377 if (!sta) {
3378 err = -ENOMEM;
3379 goto err_clear;
3380 }
3381
3382 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3383
3384 err = sta_info_insert(sta);
3385 sta = NULL;
3386 if (err) {
3387 printk(KERN_DEBUG
3388 "%s: failed to insert STA entry for the AP (error %d)\n",
3389 sdata->name, err);
3390 goto err_clear;
3391 }
3392 } else
3393 WARN_ON_ONCE(memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN));
3394
3395 if (!bss->dtim_period &&
3396 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3397 /*
3398 * Wait up to one beacon interval ...
3399 * should this be more if we miss one?
3400 */
3401 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3402 sdata->name, ifmgd->bssid);
3403 assoc_data->timeout = jiffies +
3404 TU_TO_EXP_TIME(req->bss->beacon_interval);
3405 } else {
3406 assoc_data->have_beacon = true;
3407 assoc_data->sent_assoc = false;
3408 assoc_data->timeout = jiffies;
3409 }
3410 run_again(ifmgd, assoc_data->timeout);
3411
3412 err = 0;
3413 goto out;
3414 err_clear:
3415 ifmgd->assoc_data = NULL;
3416 err_free:
3417 kfree(assoc_data);
3418 out:
3419 mutex_unlock(&ifmgd->mtx);
3420
3421 return err;
f0706e82
JB		 3422}
3423
77fdaa12 3424int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 3425 struct cfg80211_deauth_request *req,
3426 void *cookie)
f0706e82 3427{
46900298 3428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
05e48e8e 3429 bool assoc_bss = false;
f0706e82 3430
77fdaa12
JB		 3431 mutex_lock(&ifmgd->mtx);
3432
95de817b
JB		 3433 if (ifmgd->associated &&
3434 memcmp(ifmgd->associated->bssid, req->bssid, ETH_ALEN) == 0) {
53f73c09 3435 ieee80211_set_disassoc(sdata, false, true);
05e48e8e 3436 assoc_bss = true;
66e67e41
JB		 3437 } else if (ifmgd->auth_data) {
3438 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3439 mutex_unlock(&ifmgd->mtx);
66e67e41 3440 return 0;
af6b6374 3441 }
66e67e41 3442 mutex_unlock(&ifmgd->mtx);
77fdaa12 3443
0ff71613 3444 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3445 sdata->name, req->bssid, req->reason_code);
0ff71613 3446
95de817b
JB		 3447 ieee80211_send_deauth_disassoc(sdata, req->bssid, IEEE80211_STYPE_DEAUTH,
3448 req->reason_code, cookie, true);
05e48e8e 3449 if (assoc_bss)
07ba55d7 3450 sta_info_flush(sdata->local, sdata);
f0706e82 3451
7da7cc1d 3452 mutex_lock(&sdata->local->mtx);
bc83b681 3453 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3454 mutex_unlock(&sdata->local->mtx);
bc83b681 3455
f0706e82
JB		 3456 return 0;
3457}
84363e6e 3458
77fdaa12 3459int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 3460 struct cfg80211_disassoc_request *req,
3461 void *cookie)
9c6bd790 3462{
77fdaa12 3463 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3464 u8 bssid[ETH_ALEN];
9c6bd790 3465
77fdaa12 3466 mutex_lock(&ifmgd->mtx);
10f644a4 3467
8d8b261a
JB		 3468 /*
3469 * cfg80211 should catch this ... but it's racy since
3470 * we can receive a disassoc frame, process it, hand it
3471 * to cfg80211 while that's in a locked section already
3472 * trying to tell us that the user wants to disconnect.
3473 */
0c1ad2ca 3474 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3475 mutex_unlock(&ifmgd->mtx);
3476 return -ENOLINK;
3477 }
3478
0ff71613 3479 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3480 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3481
e69e95db 3482 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 3483 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 3484
3485 mutex_unlock(&ifmgd->mtx);
10f644a4 3486
77fdaa12 3487 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 3488 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 3489 cookie, !req->local_state_change);
07ba55d7 3490 sta_info_flush(sdata->local, sdata);
bc83b681 3491
7da7cc1d 3492 mutex_lock(&sdata->local->mtx);
bc83b681 3493 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3494 mutex_unlock(&sdata->local->mtx);
bc83b681 3495
10f644a4
JB		 3496 return 0;
3497}
026331c4 3498
a97c13c3
JO		 3499void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3500 enum nl80211_cqm_rssi_threshold_event rssi_event,
3501 gfp_t gfp)
3502{
3503 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3504
b5878a2d
JB		 3505 trace_api_cqm_rssi_notify(sdata, rssi_event);
3506
a97c13c3
JO		 3507 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3508}
3509EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3510
3511unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3512{
3513 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3514 return sdata->dev->operstate;
3515}
3516EXPORT_SYMBOL(ieee80211_get_operstate);
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