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mac80211: fix ieee80211_set_disassoc() sending DelBA
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
5fef7dbc
JB		 91#define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
149 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 150 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 151}
152
be099e82
LR		 153void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
154{
0c699c3a
LR		 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
156
8628172f
SG		 157 if (unlikely(!sdata->u.mgd.associated))
158 return;
159
be099e82
LR		 160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
161 return;
162
163 mod_timer(&sdata->u.mgd.conn_mon_timer,
164 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 165
166 ifmgd->probe_send_count = 0;
be099e82
LR		 167}
168
5484e237 169static int ecw2cw(int ecw)
60f8b39c 170{
5484e237 171 return (1 << ecw) - 1;
60f8b39c
JB		 172}
173
d5522e03
JB		 174/*
175 * ieee80211_enable_ht should be called only after the operating band
176 * has been determined as ht configuration depends on the hw's
177 * HT abilities for a specific band.
178 */
179static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
180 struct ieee80211_ht_info *hti,
7cc44ed4
RM		 181 const u8 *bssid, u16 ap_ht_cap_flags,
182 bool beacon_htcap_ie)
d5522e03
JB		 183{
184 struct ieee80211_local *local = sdata->local;
185 struct ieee80211_supported_band *sband;
d5522e03
JB		 186 struct sta_info *sta;
187 u32 changed = 0;
172710bf 188 int hti_cfreq;
9ed6bcce 189 u16 ht_opmode;
0aaffa9b
JB		 190 bool enable_ht = true;
191 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 192 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
193
194 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
195
0aaffa9b
JB		 196 prev_chantype = sdata->vif.bss_conf.channel_type;
197
d5522e03
JB		 198 /* HT is not supported */
199 if (!sband->ht_cap.ht_supported)
200 enable_ht = false;
201
172710bf
BG		 202 if (enable_ht) {
203 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
204 sband->band);
205 /* check that channel matches the right operating channel */
206 if (local->hw.conf.channel->center_freq != hti_cfreq) {
207 /* Some APs mess this up, evidently.
208 * Netgear WNDR3700 sometimes reports 4 higher than
209 * the actual channel, for instance.
210 */
211 printk(KERN_DEBUG
212 "%s: Wrong control channel in association"
213 " response: configured center-freq: %d"
214 " hti-cfreq: %d hti->control_chan: %d"
215 " band: %d. Disabling HT.\n",
216 sdata->name,
217 local->hw.conf.channel->center_freq,
218 hti_cfreq, hti->control_chan,
219 sband->band);
220 enable_ht = false;
221 }
222 }
d5522e03
JB		 223
224 if (enable_ht) {
225 channel_type = NL80211_CHAN_HT20;
226
227 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
ef96a842 228 !ieee80111_cfg_override_disables_ht40(sdata) &&
d5522e03
JB		 229 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
230 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
231 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
232 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 233 if (!(local->hw.conf.channel->flags &
234 IEEE80211_CHAN_NO_HT40PLUS))
235 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 236 break;
237 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 238 if (!(local->hw.conf.channel->flags &
239 IEEE80211_CHAN_NO_HT40MINUS))
240 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 241 break;
242 }
243 }
244 }
245
fe6f212c
RC		 246 if (local->tmp_channel)
247 local->tmp_channel_type = channel_type;
d5522e03 248
0aaffa9b
JB		 249 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
250 /* can only fail due to HT40+/- mismatch */
251 channel_type = NL80211_CHAN_HT20;
252 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
253 }
d5522e03 254
7cc44ed4
RM		 255 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
256 /*
257 * Whenever the AP announces the HT mode change that can be
258 * 40MHz intolerant or etc., it would be safer to stop tx
259 * queues before doing hw config to avoid buffer overflow.
260 */
261 ieee80211_stop_queues_by_reason(&sdata->local->hw,
262 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
263
264 /* flush out all packets */
265 synchronize_net();
266
267 drv_flush(local, false);
268 }
269
0aaffa9b
JB		 270 /* channel_type change automatically detected */
271 ieee80211_hw_config(local, 0);
d5522e03 272
0aaffa9b 273 if (prev_chantype != channel_type) {
d5522e03 274 rcu_read_lock();
abe60632 275 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 276 if (sta)
277 rate_control_rate_update(local, sband, sta,
4fa00437 278 IEEE80211_RC_HT_CHANGED,
0aaffa9b 279 channel_type);
d5522e03 280 rcu_read_unlock();
7cc44ed4
RM		 281
282 if (beacon_htcap_ie)
283 ieee80211_wake_queues_by_reason(&sdata->local->hw,
284 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 285 }
d5522e03 286
9ed6bcce 287 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 288
289 /* if bss configuration changed store the new one */
0aaffa9b
JB		 290 if (sdata->ht_opmode_valid != enable_ht ||
291 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
292 prev_chantype != channel_type) {
d5522e03 293 changed |= BSS_CHANGED_HT;
9ed6bcce 294 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 295 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 296 }
297
298 return changed;
299}
300
9c6bd790
JB		 301/* frame sending functions */
302
66e67e41
JB		 303static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
304 struct ieee80211_supported_band *sband,
305 u32 *rates)
306{
307 int i, j, count;
308 *rates = 0;
309 count = 0;
310 for (i = 0; i < supp_rates_len; i++) {
311 int rate = (supp_rates[i] & 0x7F) * 5;
312
313 for (j = 0; j < sband->n_bitrates; j++)
314 if (sband->bitrates[j].bitrate == rate) {
315 *rates |= BIT(j);
316 count++;
317 break;
318 }
319 }
320
321 return count;
322}
323
324static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
325 struct sk_buff *skb, const u8 *ht_info_ie,
326 struct ieee80211_supported_band *sband,
327 struct ieee80211_channel *channel,
328 enum ieee80211_smps_mode smps)
329{
330 struct ieee80211_ht_info *ht_info;
331 u8 *pos;
332 u32 flags = channel->flags;
333 u16 cap;
334 struct ieee80211_sta_ht_cap ht_cap;
335
336 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
337
338 if (!sband->ht_cap.ht_supported)
339 return;
340
341 if (!ht_info_ie)
342 return;
343
344 if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info))
345 return;
346
347 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
348 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
349
350 ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2);
351
352 /* determine capability flags */
353 cap = ht_cap.cap;
354
355 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
356 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
357 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
358 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
359 cap &= ~IEEE80211_HT_CAP_SGI_40;
360 }
361 break;
362 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
363 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
364 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
365 cap &= ~IEEE80211_HT_CAP_SGI_40;
366 }
367 break;
368 }
369
370 /* set SM PS mode properly */
371 cap &= ~IEEE80211_HT_CAP_SM_PS;
372 switch (smps) {
373 case IEEE80211_SMPS_AUTOMATIC:
374 case IEEE80211_SMPS_NUM_MODES:
375 WARN_ON(1);
376 case IEEE80211_SMPS_OFF:
377 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
378 IEEE80211_HT_CAP_SM_PS_SHIFT;
379 break;
380 case IEEE80211_SMPS_STATIC:
381 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
382 IEEE80211_HT_CAP_SM_PS_SHIFT;
383 break;
384 case IEEE80211_SMPS_DYNAMIC:
385 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
386 IEEE80211_HT_CAP_SM_PS_SHIFT;
387 break;
388 }
389
390 /* reserve and fill IE */
391 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
392 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
393}
394
395static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
396{
397 struct ieee80211_local *local = sdata->local;
398 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
399 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
400 struct sk_buff *skb;
401 struct ieee80211_mgmt *mgmt;
402 u8 *pos, qos_info;
403 size_t offset = 0, noffset;
404 int i, count, rates_len, supp_rates_len;
405 u16 capab;
406 struct ieee80211_supported_band *sband;
407 u32 rates = 0;
408 struct ieee80211_bss *bss = (void *)assoc_data->bss->priv;
409
410 lockdep_assert_held(&ifmgd->mtx);
411
412 sband = local->hw.wiphy->bands[local->oper_channel->band];
413
414 if (assoc_data->supp_rates_len) {
415 /*
416 * Get all rates supported by the device and the AP as
417 * some APs don't like getting a superset of their rates
418 * in the association request (e.g. D-Link DAP 1353 in
419 * b-only mode)...
420 */
421 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
422 assoc_data->supp_rates_len,
423 sband, &rates);
424 } else {
425 /*
426 * In case AP not provide any supported rates information
427 * before association, we send information element(s) with
428 * all rates that we support.
429 */
430 rates = ~0;
431 rates_len = sband->n_bitrates;
432 }
433
434 skb = alloc_skb(local->hw.extra_tx_headroom +
435 sizeof(*mgmt) + /* bit too much but doesn't matter */
436 2 + assoc_data->ssid_len + /* SSID */
437 4 + rates_len + /* (extended) rates */
438 4 + /* power capability */
439 2 + 2 * sband->n_channels + /* supported channels */
440 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
441 assoc_data->ie_len + /* extra IEs */
442 9, /* WMM */
443 GFP_KERNEL);
444 if (!skb)
445 return;
446
447 skb_reserve(skb, local->hw.extra_tx_headroom);
448
449 capab = WLAN_CAPABILITY_ESS;
450
451 if (sband->band == IEEE80211_BAND_2GHZ) {
452 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
453 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
454 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
455 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
456 }
457
458 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
459 capab |= WLAN_CAPABILITY_PRIVACY;
460
461 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
462 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
463 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
464
465 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
466 memset(mgmt, 0, 24);
467 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
468 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
469 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
470
471 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
472 skb_put(skb, 10);
473 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
474 IEEE80211_STYPE_REASSOC_REQ);
475 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
476 mgmt->u.reassoc_req.listen_interval =
477 cpu_to_le16(local->hw.conf.listen_interval);
478 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
479 ETH_ALEN);
480 } else {
481 skb_put(skb, 4);
482 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
483 IEEE80211_STYPE_ASSOC_REQ);
484 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
485 mgmt->u.assoc_req.listen_interval =
486 cpu_to_le16(local->hw.conf.listen_interval);
487 }
488
489 /* SSID */
490 pos = skb_put(skb, 2 + assoc_data->ssid_len);
491 *pos++ = WLAN_EID_SSID;
492 *pos++ = assoc_data->ssid_len;
493 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
494
495 /* add all rates which were marked to be used above */
496 supp_rates_len = rates_len;
497 if (supp_rates_len > 8)
498 supp_rates_len = 8;
499
500 pos = skb_put(skb, supp_rates_len + 2);
501 *pos++ = WLAN_EID_SUPP_RATES;
502 *pos++ = supp_rates_len;
503
504 count = 0;
505 for (i = 0; i < sband->n_bitrates; i++) {
506 if (BIT(i) & rates) {
507 int rate = sband->bitrates[i].bitrate;
508 *pos++ = (u8) (rate / 5);
509 if (++count == 8)
510 break;
511 }
512 }
513
514 if (rates_len > count) {
515 pos = skb_put(skb, rates_len - count + 2);
516 *pos++ = WLAN_EID_EXT_SUPP_RATES;
517 *pos++ = rates_len - count;
518
519 for (i++; i < sband->n_bitrates; i++) {
520 if (BIT(i) & rates) {
521 int rate = sband->bitrates[i].bitrate;
522 *pos++ = (u8) (rate / 5);
523 }
524 }
525 }
526
527 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
528 /* 1. power capabilities */
529 pos = skb_put(skb, 4);
530 *pos++ = WLAN_EID_PWR_CAPABILITY;
531 *pos++ = 2;
532 *pos++ = 0; /* min tx power */
533 *pos++ = local->oper_channel->max_power; /* max tx power */
534
535 /* 2. supported channels */
536 /* TODO: get this in reg domain format */
537 pos = skb_put(skb, 2 * sband->n_channels + 2);
538 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
539 *pos++ = 2 * sband->n_channels;
540 for (i = 0; i < sband->n_channels; i++) {
541 *pos++ = ieee80211_frequency_to_channel(
542 sband->channels[i].center_freq);
543 *pos++ = 1; /* one channel in the subband*/
544 }
545 }
546
547 /* if present, add any custom IEs that go before HT */
548 if (assoc_data->ie_len && assoc_data->ie) {
549 static const u8 before_ht[] = {
550 WLAN_EID_SSID,
551 WLAN_EID_SUPP_RATES,
552 WLAN_EID_EXT_SUPP_RATES,
553 WLAN_EID_PWR_CAPABILITY,
554 WLAN_EID_SUPPORTED_CHANNELS,
555 WLAN_EID_RSN,
556 WLAN_EID_QOS_CAPA,
557 WLAN_EID_RRM_ENABLED_CAPABILITIES,
558 WLAN_EID_MOBILITY_DOMAIN,
559 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
560 };
561 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
562 before_ht, ARRAY_SIZE(before_ht),
563 offset);
564 pos = skb_put(skb, noffset - offset);
565 memcpy(pos, assoc_data->ie + offset, noffset - offset);
566 offset = noffset;
567 }
568
569 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N) &&
570 bss->wmm_used && local->hw.queues >= 4)
571 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_information_ie,
572 sband, local->oper_channel, ifmgd->ap_smps);
573
574 /* if present, add any custom non-vendor IEs that go after HT */
575 if (assoc_data->ie_len && assoc_data->ie) {
576 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
577 assoc_data->ie_len,
578 offset);
579 pos = skb_put(skb, noffset - offset);
580 memcpy(pos, assoc_data->ie + offset, noffset - offset);
581 offset = noffset;
582 }
583
584 if (assoc_data->wmm_used && local->hw.queues >= 4) {
585 if (assoc_data->uapsd_used) {
586 qos_info = local->uapsd_queues;
587 qos_info |= (local->uapsd_max_sp_len <<
588 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
589 } else {
590 qos_info = 0;
591 }
592
593 pos = skb_put(skb, 9);
594 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
595 *pos++ = 7; /* len */
596 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
597 *pos++ = 0x50;
598 *pos++ = 0xf2;
599 *pos++ = 2; /* WME */
600 *pos++ = 0; /* WME info */
601 *pos++ = 1; /* WME ver */
602 *pos++ = qos_info;
603 }
604
605 /* add any remaining custom (i.e. vendor specific here) IEs */
606 if (assoc_data->ie_len && assoc_data->ie) {
607 noffset = assoc_data->ie_len;
608 pos = skb_put(skb, noffset - offset);
609 memcpy(pos, assoc_data->ie + offset, noffset - offset);
610 }
611
612 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
613 ieee80211_tx_skb(sdata, skb);
614}
615
ef422bc0 616static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 617 const u8 *bssid, u16 stype,
5fef7dbc
JB		 618 u16 reason, bool send_frame,
619 u8 *frame_buf)
9ac19a90
JB		 620{
621 struct ieee80211_local *local = sdata->local;
46900298 622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 623 struct sk_buff *skb;
5fef7dbc 624 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 625
5fef7dbc
JB		 626 /* build frame */
627 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
628 mgmt->duration = 0; /* initialize only */
629 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 630 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 631 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 632 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 633 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 634 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
635
5fef7dbc
JB		 636 if (send_frame) {
637 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
638 DEAUTH_DISASSOC_LEN);
639 if (!skb)
640 return;
d5cdfacb 641
5fef7dbc
JB		 642 skb_reserve(skb, local->hw.extra_tx_headroom);
643
644 /* copy in frame */
645 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
646 mgmt, DEAUTH_DISASSOC_LEN);
647
648 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
649 IEEE80211_SKB_CB(skb)->flags |=
650 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 651 ieee80211_tx_skb(sdata, skb);
5fef7dbc 652 }
9ac19a90
JB		 653}
654
572e0012
KV		 655void ieee80211_send_pspoll(struct ieee80211_local *local,
656 struct ieee80211_sub_if_data *sdata)
657{
572e0012
KV		 658 struct ieee80211_pspoll *pspoll;
659 struct sk_buff *skb;
572e0012 660
d8cd189e
KV		 661 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
662 if (!skb)
572e0012 663 return;
572e0012 664
d8cd189e
KV		 665 pspoll = (struct ieee80211_pspoll *) skb->data;
666 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 667
62ae67be
JB		 668 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
669 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 670}
671
965bedad
JB		 672void ieee80211_send_nullfunc(struct ieee80211_local *local,
673 struct ieee80211_sub_if_data *sdata,
674 int powersave)
675{
676 struct sk_buff *skb;
d8cd189e 677 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 679
d8cd189e
KV		 680 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
681 if (!skb)
965bedad 682 return;
965bedad 683
d8cd189e 684 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 685 if (powersave)
d8cd189e 686 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 687
62ae67be 688 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 689 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
690 IEEE80211_STA_CONNECTION_POLL))
691 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
692
62ae67be 693 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 694}
695
d524215f
FF		 696static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
697 struct ieee80211_sub_if_data *sdata)
698{
699 struct sk_buff *skb;
700 struct ieee80211_hdr *nullfunc;
701 __le16 fc;
702
703 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
704 return;
705
706 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 707 if (!skb)
d524215f 708 return;
d15b8459 709
d524215f
FF		 710 skb_reserve(skb, local->hw.extra_tx_headroom);
711
712 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
713 memset(nullfunc, 0, 30);
714 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
715 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
716 nullfunc->frame_control = fc;
717 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
718 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
719 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
720 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
721
722 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
723 ieee80211_tx_skb(sdata, skb);
724}
725
cc32abd4
JB		 726/* spectrum management related things */
727static void ieee80211_chswitch_work(struct work_struct *work)
728{
729 struct ieee80211_sub_if_data *sdata =
730 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
732
9607e6b6 733 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 734 return;
735
77fdaa12
JB		 736 mutex_lock(&ifmgd->mtx);
737 if (!ifmgd->associated)
738 goto out;
cc32abd4
JB		 739
740 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 741 if (!sdata->local->ops->channel_switch) {
742 /* call "hw_config" only if doing sw channel switch */
743 ieee80211_hw_config(sdata->local,
744 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 745 } else {
746 /* update the device channel directly */
747 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 748 }
77fdaa12 749
cc32abd4 750 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 751 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 752
cc32abd4
JB		 753 ieee80211_wake_queues_by_reason(&sdata->local->hw,
754 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 755 out:
756 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
757 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 758}
759
5ce6e438
JB		 760void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
761{
762 struct ieee80211_sub_if_data *sdata;
763 struct ieee80211_if_managed *ifmgd;
764
765 sdata = vif_to_sdata(vif);
766 ifmgd = &sdata->u.mgd;
767
768 trace_api_chswitch_done(sdata, success);
769 if (!success) {
770 /*
771 * If the channel switch was not successful, stay
772 * around on the old channel. We currently lack
773 * good handling of this situation, possibly we
774 * should just drop the association.
775 */
776 sdata->local->csa_channel = sdata->local->oper_channel;
777 }
778
779 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
780}
781EXPORT_SYMBOL(ieee80211_chswitch_done);
782
cc32abd4
JB		 783static void ieee80211_chswitch_timer(unsigned long data)
784{
785 struct ieee80211_sub_if_data *sdata =
786 (struct ieee80211_sub_if_data *) data;
787 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
788
5bb644a0
JB		 789 if (sdata->local->quiescing) {
790 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
791 return;
792 }
793
42935eca 794 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 795}
796
797void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
798 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 799 struct ieee80211_bss *bss,
800 u64 timestamp)
cc32abd4 801{
0c1ad2ca
JB		 802 struct cfg80211_bss *cbss =
803 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 804 struct ieee80211_channel *new_ch;
805 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 806 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
807 cbss->channel->band);
cc32abd4 808
77fdaa12
JB		 809 ASSERT_MGD_MTX(ifmgd);
810
811 if (!ifmgd->associated)
cc32abd4
JB		 812 return;
813
fbe9c429 814 if (sdata->local->scanning)
cc32abd4
JB		 815 return;
816
817 /* Disregard subsequent beacons if we are already running a timer
818 processing a CSA */
819
820 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
821 return;
822
823 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
824 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
825 return;
826
827 sdata->local->csa_channel = new_ch;
828
5ce6e438
JB		 829 if (sdata->local->ops->channel_switch) {
830 /* use driver's channel switch callback */
831 struct ieee80211_channel_switch ch_switch;
832 memset(&ch_switch, 0, sizeof(ch_switch));
833 ch_switch.timestamp = timestamp;
834 if (sw_elem->mode) {
835 ch_switch.block_tx = true;
836 ieee80211_stop_queues_by_reason(&sdata->local->hw,
837 IEEE80211_QUEUE_STOP_REASON_CSA);
838 }
839 ch_switch.channel = new_ch;
840 ch_switch.count = sw_elem->count;
841 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
842 drv_channel_switch(sdata->local, &ch_switch);
843 return;
844 }
845
846 /* channel switch handled in software */
cc32abd4 847 if (sw_elem->count <= 1) {
42935eca 848 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 849 } else {
9feaddc7
WYG		 850 if (sw_elem->mode)
851 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 852 IEEE80211_QUEUE_STOP_REASON_CSA);
853 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
854 mod_timer(&ifmgd->chswitch_timer,
855 jiffies +
856 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 857 cbss->beacon_interval));
cc32abd4
JB		 858 }
859}
860
861static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
862 u16 capab_info, u8 *pwr_constr_elem,
863 u8 pwr_constr_elem_len)
864{
865 struct ieee80211_conf *conf = &sdata->local->hw.conf;
866
867 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
868 return;
869
870 /* Power constraint IE length should be 1 octet */
871 if (pwr_constr_elem_len != 1)
872 return;
873
a48b13ac 874 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 875 (*pwr_constr_elem != sdata->local->power_constr_level)) {
876 sdata->local->power_constr_level = *pwr_constr_elem;
877 ieee80211_hw_config(sdata->local, 0);
878 }
879}
880
f90754c1
JO		 881void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
882{
883 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
884 struct ieee80211_local *local = sdata->local;
885 struct ieee80211_conf *conf = &local->hw.conf;
886
887 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
888 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
889 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
890
891 local->disable_dynamic_ps = false;
892 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
893}
894EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
895
896void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
897{
898 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
899 struct ieee80211_local *local = sdata->local;
900 struct ieee80211_conf *conf = &local->hw.conf;
901
902 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
903 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
904 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
905
906 local->disable_dynamic_ps = true;
907 conf->dynamic_ps_timeout = 0;
908 del_timer_sync(&local->dynamic_ps_timer);
909 ieee80211_queue_work(&local->hw,
910 &local->dynamic_ps_enable_work);
911}
912EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
913
965bedad
JB		 914/* powersave */
915static void ieee80211_enable_ps(struct ieee80211_local *local,
916 struct ieee80211_sub_if_data *sdata)
917{
918 struct ieee80211_conf *conf = &local->hw.conf;
919
d5edaedc
JB		 920 /*
921 * If we are scanning right now then the parameters will
922 * take effect when scan finishes.
923 */
fbe9c429 924 if (local->scanning)
d5edaedc
JB		 925 return;
926
965bedad
JB		 927 if (conf->dynamic_ps_timeout > 0 &&
928 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
929 mod_timer(&local->dynamic_ps_timer, jiffies +
930 msecs_to_jiffies(conf->dynamic_ps_timeout));
931 } else {
932 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
933 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 934
2a13052f
JO		 935 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
936 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
937 return;
938
939 conf->flags |= IEEE80211_CONF_PS;
940 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 941 }
942}
943
944static void ieee80211_change_ps(struct ieee80211_local *local)
945{
946 struct ieee80211_conf *conf = &local->hw.conf;
947
948 if (local->ps_sdata) {
965bedad
JB		 949 ieee80211_enable_ps(local, local->ps_sdata);
950 } else if (conf->flags & IEEE80211_CONF_PS) {
951 conf->flags &= ~IEEE80211_CONF_PS;
952 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
953 del_timer_sync(&local->dynamic_ps_timer);
954 cancel_work_sync(&local->dynamic_ps_enable_work);
955 }
956}
957
808118cb
JY		 958static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
959{
960 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
961 struct sta_info *sta = NULL;
c2c98fde 962 bool authorized = false;
808118cb
JY		 963
964 if (!mgd->powersave)
965 return false;
966
05cb9108
JB		 967 if (mgd->broken_ap)
968 return false;
969
808118cb
JY		 970 if (!mgd->associated)
971 return false;
972
973 if (!mgd->associated->beacon_ies)
974 return false;
975
976 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
977 IEEE80211_STA_CONNECTION_POLL))
978 return false;
979
980 rcu_read_lock();
981 sta = sta_info_get(sdata, mgd->bssid);
982 if (sta)
c2c98fde 983 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 984 rcu_read_unlock();
985
c2c98fde 986 return authorized;
808118cb
JY		 987}
988
965bedad 989/* need to hold RTNL or interface lock */
10f644a4 990void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 991{
992 struct ieee80211_sub_if_data *sdata, *found = NULL;
993 int count = 0;
195e294d 994 int timeout;
965bedad
JB		 995
996 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
997 local->ps_sdata = NULL;
998 return;
999 }
1000
af6b6374
JB		 1001 if (!list_empty(&local->work_list)) {
1002 local->ps_sdata = NULL;
1003 goto change;
1004 }
1005
965bedad 1006 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1007 if (!ieee80211_sdata_running(sdata))
965bedad 1008 continue;
8c7914de
RM		 1009 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1010 /* If an AP vif is found, then disable PS
1011 * by setting the count to zero thereby setting
1012 * ps_sdata to NULL.
1013 */
1014 count = 0;
1015 break;
1016 }
965bedad
JB		 1017 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1018 continue;
1019 found = sdata;
1020 count++;
1021 }
1022
808118cb 1023 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1024 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1025 s32 beaconint_us;
1026
1027 if (latency < 0)
ed77134b 1028 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1029
1030 beaconint_us = ieee80211_tu_to_usec(
1031 found->vif.bss_conf.beacon_int);
1032
ff616381 1033 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1034 if (timeout < 0) {
1035 /*
ff616381
JO		 1036 * Go to full PSM if the user configures a very low
1037 * latency requirement.
0ab82b04
EP		 1038 * The 2000 second value is there for compatibility
1039 * until the PM_QOS_NETWORK_LATENCY is configured
1040 * with real values.
195e294d 1041 */
0ab82b04
EP		 1042 if (latency > (1900 * USEC_PER_MSEC) &&
1043 latency != (2000 * USEC_PER_SEC))
195e294d 1044 timeout = 0;
ff616381
JO		 1045 else
1046 timeout = 100;
195e294d 1047 }
f90754c1
JO		 1048 local->dynamic_ps_user_timeout = timeout;
1049 if (!local->disable_dynamic_ps)
1050 conf->dynamic_ps_timeout =
1051 local->dynamic_ps_user_timeout;
195e294d 1052
04fe2037 1053 if (beaconint_us > latency) {
10f644a4 1054 local->ps_sdata = NULL;
04fe2037 1055 } else {
56007a02 1056 struct ieee80211_bss *bss;
04fe2037 1057 int maxslp = 1;
56007a02 1058 u8 dtimper;
04fe2037 1059
56007a02
JB		 1060 bss = (void *)found->u.mgd.associated->priv;
1061 dtimper = bss->dtim_period;
1062
1063 /* If the TIM IE is invalid, pretend the value is 1 */
1064 if (!dtimper)
1065 dtimper = 1;
1066 else if (dtimper > 1)
04fe2037
JB		 1067 maxslp = min_t(int, dtimper,
1068 latency / beaconint_us);
1069
9ccebe61 1070 local->hw.conf.max_sleep_period = maxslp;
56007a02 1071 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1072 local->ps_sdata = found;
04fe2037 1073 }
10f644a4 1074 } else {
965bedad 1075 local->ps_sdata = NULL;
10f644a4 1076 }
965bedad 1077
af6b6374 1078 change:
965bedad
JB		 1079 ieee80211_change_ps(local);
1080}
1081
1082void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1083{
1084 struct ieee80211_local *local =
1085 container_of(work, struct ieee80211_local,
1086 dynamic_ps_disable_work);
1087
1088 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1089 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1090 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1091 }
1092
1093 ieee80211_wake_queues_by_reason(&local->hw,
1094 IEEE80211_QUEUE_STOP_REASON_PS);
1095}
1096
1097void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1098{
1099 struct ieee80211_local *local =
1100 container_of(work, struct ieee80211_local,
1101 dynamic_ps_enable_work);
1102 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1103 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1104 unsigned long flags;
1105 int q;
965bedad
JB		 1106
1107 /* can only happen when PS was just disabled anyway */
1108 if (!sdata)
1109 return;
1110
5e34069c
CL		 1111 ifmgd = &sdata->u.mgd;
1112
965bedad
JB		 1113 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1114 return;
1115
77b7023a
AN		 1116 if (!local->disable_dynamic_ps &&
1117 local->hw.conf.dynamic_ps_timeout > 0) {
1118 /* don't enter PS if TX frames are pending */
1119 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1120 mod_timer(&local->dynamic_ps_timer, jiffies +
1121 msecs_to_jiffies(
1122 local->hw.conf.dynamic_ps_timeout));
1123 return;
1124 }
77b7023a
AN		 1125
1126 /*
1127 * transmission can be stopped by others which leads to
1128 * dynamic_ps_timer expiry. Postpone the ps timer if it
1129 * is not the actual idle state.
1130 */
1131 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1132 for (q = 0; q < local->hw.queues; q++) {
1133 if (local->queue_stop_reasons[q]) {
1134 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1135 flags);
1136 mod_timer(&local->dynamic_ps_timer, jiffies +
1137 msecs_to_jiffies(
1138 local->hw.conf.dynamic_ps_timeout));
1139 return;
1140 }
1141 }
1142 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1143 }
1ddc2867 1144
375177bf 1145 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1146 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1147 netif_tx_stop_all_queues(sdata->dev);
965bedad 1148
e8306f98
VN		 1149 if (drv_tx_frames_pending(local))
1150 mod_timer(&local->dynamic_ps_timer, jiffies +
1151 msecs_to_jiffies(
1152 local->hw.conf.dynamic_ps_timeout));
1153 else {
1154 ieee80211_send_nullfunc(local, sdata, 1);
1155 /* Flush to get the tx status of nullfunc frame */
1156 drv_flush(local, false);
1157 }
f3e85b9e
VN		 1158 }
1159
2a13052f
JO		 1160 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1161 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1162 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1163 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1164 local->hw.conf.flags |= IEEE80211_CONF_PS;
1165 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1166 }
f3e85b9e 1167
77b7023a
AN		 1168 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1169 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1170}
1171
1172void ieee80211_dynamic_ps_timer(unsigned long data)
1173{
1174 struct ieee80211_local *local = (void *) data;
1175
78f1a8b7 1176 if (local->quiescing || local->suspended)
5bb644a0
JB		 1177 return;
1178
42935eca 1179 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1180}
1181
60f8b39c 1182/* MLME */
f698d856 1183static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1184 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1185 u8 *wmm_param, size_t wmm_param_len)
1186{
f0706e82 1187 struct ieee80211_tx_queue_params params;
4ced3f74 1188 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1189 size_t left;
1190 int count;
ab13315a 1191 u8 *pos, uapsd_queues = 0;
f0706e82 1192
e1b3ec1a
SG		 1193 if (!local->ops->conf_tx)
1194 return;
1195
af6b6374 1196 if (local->hw.queues < 4)
3434fbd3
JB		 1197 return;
1198
1199 if (!wmm_param)
1200 return;
1201
f0706e82
JB		 1202 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1203 return;
ab13315a
KV		 1204
1205 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 1206 uapsd_queues = local->uapsd_queues;
ab13315a 1207
f0706e82 1208 count = wmm_param[6] & 0x0f;
46900298 1209 if (count == ifmgd->wmm_last_param_set)
f0706e82 1210 return;
46900298 1211 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1212
1213 pos = wmm_param + 8;
1214 left = wmm_param_len - 8;
1215
1216 memset(&params, 0, sizeof(params));
1217
f0706e82
JB		 1218 local->wmm_acm = 0;
1219 for (; left >= 4; left -= 4, pos += 4) {
1220 int aci = (pos[0] >> 5) & 0x03;
1221 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1222 bool uapsd = false;
f0706e82
JB		 1223 int queue;
1224
1225 switch (aci) {
0eeb59fe 1226 case 1: /* AC_BK */
e100bb64 1227 queue = 3;
988c0f72 1228 if (acm)
0eeb59fe 1229 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1230 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1231 uapsd = true;
f0706e82 1232 break;
0eeb59fe 1233 case 2: /* AC_VI */
e100bb64 1234 queue = 1;
988c0f72 1235 if (acm)
0eeb59fe 1236 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1237 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1238 uapsd = true;
f0706e82 1239 break;
0eeb59fe 1240 case 3: /* AC_VO */
e100bb64 1241 queue = 0;
988c0f72 1242 if (acm)
0eeb59fe 1243 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1244 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1245 uapsd = true;
f0706e82 1246 break;
0eeb59fe 1247 case 0: /* AC_BE */
f0706e82 1248 default:
e100bb64 1249 queue = 2;
988c0f72 1250 if (acm)
0eeb59fe 1251 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1252 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1253 uapsd = true;
f0706e82
JB		 1254 break;
1255 }
1256
1257 params.aifs = pos[0] & 0x0f;
1258 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1259 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1260 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1261 params.uapsd = uapsd;
1262
f4ea83dd 1263#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1264 wiphy_debug(local->hw.wiphy,
1265 "WMM queue=%d aci=%d acm=%d aifs=%d "
1266 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1267 queue, aci, acm,
1268 params.aifs, params.cw_min, params.cw_max,
1269 params.txop, params.uapsd);
3330d7be 1270#endif
f6f3def3
EP		 1271 sdata->tx_conf[queue] = params;
1272 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1273 wiphy_debug(local->hw.wiphy,
1274 "failed to set TX queue parameters for queue %d\n",
1275 queue);
f0706e82 1276 }
e1b3ec1a
SG		 1277
1278 /* enable WMM or activate new settings */
4ced3f74
JB		 1279 sdata->vif.bss_conf.qos = true;
1280 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 1281}
1282
7a5158ef
JB		 1283static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1284 u16 capab, bool erp_valid, u8 erp)
5628221c 1285{
bda3933a 1286 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1287 u32 changed = 0;
7a5158ef
JB		 1288 bool use_protection;
1289 bool use_short_preamble;
1290 bool use_short_slot;
1291
1292 if (erp_valid) {
1293 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1294 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1295 } else {
1296 use_protection = false;
1297 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1298 }
1299
1300 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1301 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1302 use_short_slot = true;
5628221c 1303
471b3efd 1304 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1305 bss_conf->use_cts_prot = use_protection;
1306 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1307 }
7e9ed188 1308
d43c7b37 1309 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1310 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1311 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1312 }
d9430a32 1313
7a5158ef 1314 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1315 bss_conf->use_short_slot = use_short_slot;
1316 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1317 }
1318
1319 return changed;
1320}
1321
f698d856 1322static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1323 struct cfg80211_bss *cbss,
ae5eb026 1324 u32 bss_info_changed)
f0706e82 1325{
0c1ad2ca 1326 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1327 struct ieee80211_local *local = sdata->local;
68542962 1328 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1329
ae5eb026 1330 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1331 /* set timing information */
68542962
JO		 1332 bss_conf->beacon_int = cbss->beacon_interval;
1333 bss_conf->timestamp = cbss->tsf;
5628221c 1334
77fdaa12
JB		 1335 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1336 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1337 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1338
7ccc8bd7
FF		 1339 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1340 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1341
0c1ad2ca
JB		 1342 sdata->u.mgd.associated = cbss;
1343 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1344
17e4ec14
JM		 1345 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1346
b291ba11
JB		 1347 /* just to be sure */
1348 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1349 IEEE80211_STA_BEACON_POLL);
1350
9ac19a90 1351 ieee80211_led_assoc(local, 1);
9306102e 1352
e5b900d2
JB		 1353 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1354 bss_conf->dtim_period = bss->dtim_period;
1355 else
1356 bss_conf->dtim_period = 0;
1357
68542962 1358 bss_conf->assoc = 1;
96dd22ac
JB		 1359 /*
1360 * For now just always ask the driver to update the basic rateset
1361 * when we have associated, we aren't checking whether it actually
1362 * changed or not.
1363 */
ae5eb026 1364 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1365
1366 /* And the BSSID changed - we're associated now */
1367 bss_info_changed |= BSS_CHANGED_BSSID;
1368
a97c13c3 1369 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1370 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1371 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1372 bss_info_changed |= BSS_CHANGED_CQM;
1373
68542962
JO		 1374 /* Enable ARP filtering */
1375 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1376 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1377 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1378 }
1379
ae5eb026 1380 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1381
056508dc
JB		 1382 mutex_lock(&local->iflist_mtx);
1383 ieee80211_recalc_ps(local, -1);
025e6be2 1384 ieee80211_recalc_smps(local);
056508dc 1385 mutex_unlock(&local->iflist_mtx);
e0cb686f 1386
8a5b33f5 1387 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1388 netif_carrier_on(sdata->dev);
f0706e82
JB		 1389}
1390
e69e95db 1391static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1392 bool remove_sta, bool tx)
aa458d17 1393{
46900298 1394 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1395 struct ieee80211_local *local = sdata->local;
1396 struct sta_info *sta;
e0cb686f 1397 u32 changed = 0, config_changed = 0;
b291ba11 1398 u8 bssid[ETH_ALEN];
aa458d17 1399
77fdaa12
JB		 1400 ASSERT_MGD_MTX(ifmgd);
1401
b291ba11
JB		 1402 if (WARN_ON(!ifmgd->associated))
1403 return;
1404
0c1ad2ca 1405 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1406
77fdaa12
JB		 1407 ifmgd->associated = NULL;
1408 memset(ifmgd->bssid, 0, ETH_ALEN);
1409
1410 /*
1411 * we need to commit the associated = NULL change because the
1412 * scan code uses that to determine whether this iface should
1413 * go to/wake up from powersave or not -- and could otherwise
1414 * wake the queues erroneously.
1415 */
1416 smp_mb();
1417
1418 /*
1419 * Thus, we can only afterwards stop the queues -- to account
1420 * for the case where another CPU is finishing a scan at this
1421 * time -- we don't want the scan code to enable queues.
1422 */
aa458d17 1423
8a5b33f5 1424 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1425 netif_carrier_off(sdata->dev);
1426
2a419056 1427 mutex_lock(&local->sta_mtx);
abe60632 1428 sta = sta_info_get(sdata, bssid);
4cad6c7c 1429 if (sta) {
c2c98fde 1430 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1431 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1432 }
2a419056 1433 mutex_unlock(&local->sta_mtx);
aa458d17 1434
f5e5bf25
TW		 1435 changed |= ieee80211_reset_erp_info(sdata);
1436
f5e5bf25 1437 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1438 changed |= BSS_CHANGED_ASSOC;
1439 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1440
aa837e1d
JB		 1441 ieee80211_set_wmm_default(sdata);
1442
4797938c 1443 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1444 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1445
413ad50a
JB		 1446 /* on the next assoc, re-program HT parameters */
1447 sdata->ht_opmode_valid = false;
ef96a842
BG		 1448 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1449 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1450
a8302de9
VT		 1451 local->power_constr_level = 0;
1452
520eb820
KV		 1453 del_timer_sync(&local->dynamic_ps_timer);
1454 cancel_work_sync(&local->dynamic_ps_enable_work);
1455
e0cb686f
KV		 1456 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1457 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1458 config_changed |= IEEE80211_CONF_CHANGE_PS;
1459 }
a331400b 1460 local->ps_sdata = NULL;
ae5eb026 1461
e0cb686f 1462 ieee80211_hw_config(local, config_changed);
9cef8737 1463
68542962
JO		 1464 /* Disable ARP filtering */
1465 if (sdata->vif.bss_conf.arp_filter_enabled) {
1466 sdata->vif.bss_conf.arp_filter_enabled = false;
1467 changed |= BSS_CHANGED_ARP_FILTER;
1468 }
1469
0aaffa9b
JB		 1470 /* The BSSID (not really interesting) and HT changed */
1471 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1472 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1473
07ba55d7 1474 /* remove AP and TDLS peers */
e69e95db 1475 if (remove_sta)
07ba55d7 1476 sta_info_flush(local, sdata);
b9dcf712
JB		 1477
1478 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1479 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1480 del_timer_sync(&sdata->u.mgd.timer);
1481 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1482}
f0706e82 1483
3cf335d5
KV		 1484void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1485 struct ieee80211_hdr *hdr)
1486{
1487 /*
1488 * We can postpone the mgd.timer whenever receiving unicast frames
1489 * from AP because we know that the connection is working both ways
1490 * at that time. But multicast frames (and hence also beacons) must
1491 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1492 * data idle periods for sending the periodic probe request to the
1493 * AP we're connected to.
3cf335d5 1494 */
b291ba11
JB		 1495 if (is_multicast_ether_addr(hdr->addr1))
1496 return;
1497
be099e82 1498 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1499}
f0706e82 1500
4e5ff376
FF		 1501static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1502{
1503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1504
1505 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1506 IEEE80211_STA_CONNECTION_POLL)))
1507 return;
1508
1509 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1510 IEEE80211_STA_BEACON_POLL);
1511 mutex_lock(&sdata->local->iflist_mtx);
1512 ieee80211_recalc_ps(sdata->local, -1);
1513 mutex_unlock(&sdata->local->iflist_mtx);
1514
1515 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1516 return;
1517
1518 /*
1519 * We've received a probe response, but are not sure whether
1520 * we have or will be receiving any beacons or data, so let's
1521 * schedule the timers again, just in case.
1522 */
1523 ieee80211_sta_reset_beacon_monitor(sdata);
1524
1525 mod_timer(&ifmgd->conn_mon_timer,
1526 round_jiffies_up(jiffies +
1527 IEEE80211_CONNECTION_IDLE_TIME));
1528}
1529
1530void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1531 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1532{
75706d0e 1533 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1534 return;
1535
04ac3c0e
FF		 1536 if (ack)
1537 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1538
1539 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1540 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1541 if (ack)
1542 sdata->u.mgd.probe_send_count = 0;
1543 else
1544 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1545 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1546 }
1547}
1548
a43abf29
ML		 1549static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1550{
1551 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1552 const u8 *ssid;
f01a067d 1553 u8 *dst = ifmgd->associated->bssid;
180205bd 1554 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1555
1556 /*
1557 * Try sending broadcast probe requests for the last three
1558 * probe requests after the first ones failed since some
1559 * buggy APs only support broadcast probe requests.
1560 */
1561 if (ifmgd->probe_send_count >= unicast_limit)
1562 dst = NULL;
a43abf29 1563
4e5ff376
FF		 1564 /*
1565 * When the hardware reports an accurate Tx ACK status, it's
1566 * better to send a nullfunc frame instead of a probe request,
1567 * as it will kick us off the AP quickly if we aren't associated
1568 * anymore. The timeout will be reset if the frame is ACKed by
1569 * the AP.
1570 */
04ac3c0e
FF		 1571 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1572 ifmgd->nullfunc_failed = false;
4e5ff376 1573 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1574 } else {
4e5ff376 1575 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1576 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1577 (u32) -1, true, false);
4e5ff376 1578 }
a43abf29
ML		 1579
1580 ifmgd->probe_send_count++;
180205bd 1581 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1582 run_again(ifmgd, ifmgd->probe_timeout);
1583}
1584
b291ba11
JB		 1585static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1586 bool beacon)
04de8381 1587{
04de8381 1588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1589 bool already = false;
34bfc411 1590
9607e6b6 1591 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1592 return;
1593
91a3bd76
LR		 1594 if (sdata->local->scanning)
1595 return;
1596
b8bc4b0a
JB		 1597 if (sdata->local->tmp_channel)
1598 return;
1599
77fdaa12
JB		 1600 mutex_lock(&ifmgd->mtx);
1601
1602 if (!ifmgd->associated)
1603 goto out;
1604
a860402d 1605#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1606 if (beacon && net_ratelimit())
1607 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1608 "- sending probe request\n", sdata->name);
a860402d 1609#endif
04de8381 1610
b291ba11
JB		 1611 /*
1612 * The driver/our work has already reported this event or the
1613 * connection monitoring has kicked in and we have already sent
1614 * a probe request. Or maybe the AP died and the driver keeps
1615 * reporting until we disassociate...
1616 *
1617 * In either case we have to ignore the current call to this
1618 * function (except for setting the correct probe reason bit)
1619 * because otherwise we would reset the timer every time and
1620 * never check whether we received a probe response!
1621 */
1622 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1623 IEEE80211_STA_CONNECTION_POLL))
1624 already = true;
1625
1626 if (beacon)
1627 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1628 else
1629 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1630
1631 if (already)
1632 goto out;
1633
4e751843
JB		 1634 mutex_lock(&sdata->local->iflist_mtx);
1635 ieee80211_recalc_ps(sdata->local, -1);
1636 mutex_unlock(&sdata->local->iflist_mtx);
1637
a43abf29
ML		 1638 ifmgd->probe_send_count = 0;
1639 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1640 out:
1641 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1642}
1643
a619a4c0
JO		 1644struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1645 struct ieee80211_vif *vif)
1646{
1647 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1648 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1649 struct sk_buff *skb;
1650 const u8 *ssid;
1651
1652 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1653 return NULL;
1654
1655 ASSERT_MGD_MTX(ifmgd);
1656
1657 if (!ifmgd->associated)
1658 return NULL;
1659
1660 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1661 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1662 (u32) -1, ssid + 2, ssid[1],
1663 NULL, 0, true);
a619a4c0
JO		 1664
1665 return skb;
1666}
1667EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1668
1e4dcd01
JO		 1669static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1670{
1671 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1672 struct ieee80211_local *local = sdata->local;
1673 u8 bssid[ETH_ALEN];
5fef7dbc 1674 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1675
1676 mutex_lock(&ifmgd->mtx);
1677 if (!ifmgd->associated) {
1678 mutex_unlock(&ifmgd->mtx);
1679 return;
1680 }
1681
1682 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1683
180205bd
BG		 1684 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1685 sdata->name, bssid);
1e4dcd01 1686
02d83e60 1687 ieee80211_set_disassoc(sdata, true, false);
1e4dcd01 1688 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1689
1e4dcd01
JO		 1690 /*
1691 * must be outside lock due to cfg80211,
1692 * but that's not a problem.
1693 */
1694 ieee80211_send_deauth_disassoc(sdata, bssid,
1695 IEEE80211_STYPE_DEAUTH,
1696 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
5fef7dbc
JB		 1697 false, frame_buf);
1698 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1699
1700 mutex_lock(&local->mtx);
1701 ieee80211_recalc_idle(local);
1702 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1703}
1704
1705void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1706{
1707 struct ieee80211_sub_if_data *sdata =
1708 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1709 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1711 struct sta_info *sta;
1712
1713 if (ifmgd->associated) {
30fa9047 1714 rcu_read_lock();
a85e1d55
PS		 1715 sta = sta_info_get(sdata, ifmgd->bssid);
1716 if (sta)
1717 sta->beacon_loss_count++;
30fa9047 1718 rcu_read_unlock();
a85e1d55 1719 }
b291ba11 1720
1e4dcd01
JO		 1721 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1722 __ieee80211_connection_loss(sdata);
1723 else
1724 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1725}
1726
04de8381
KV		 1727void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1728{
1729 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1730 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1731
b5878a2d
JB		 1732 trace_api_beacon_loss(sdata);
1733
1e4dcd01
JO		 1734 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1735 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1736}
1737EXPORT_SYMBOL(ieee80211_beacon_loss);
1738
1e4dcd01
JO		 1739void ieee80211_connection_loss(struct ieee80211_vif *vif)
1740{
1741 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1742 struct ieee80211_hw *hw = &sdata->local->hw;
1743
b5878a2d
JB		 1744 trace_api_connection_loss(sdata);
1745
1e4dcd01
JO		 1746 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1747 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1748}
1749EXPORT_SYMBOL(ieee80211_connection_loss);
1750
1751
66e67e41
JB		 1752static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1753 bool assoc)
1754{
1755 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1756
1757 lockdep_assert_held(&sdata->u.mgd.mtx);
1758
1759 if (auth_data->synced)
1760 drv_finish_tx_sync(sdata->local, sdata,
1761 auth_data->bss->bssid,
1762 IEEE80211_TX_SYNC_AUTH);
1763
1764 if (!assoc) {
1765 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1766
1767 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1768 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1769 }
1770
1771 cfg80211_put_bss(auth_data->bss);
1772 kfree(auth_data);
1773 sdata->u.mgd.auth_data = NULL;
1774}
1775
1776static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1777 struct ieee80211_mgmt *mgmt, size_t len)
1778{
1779 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1780 u8 *pos;
1781 struct ieee802_11_elems elems;
1782
1783 pos = mgmt->u.auth.variable;
1784 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1785 if (!elems.challenge)
1786 return;
1787 auth_data->expected_transaction = 4;
1788 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1789 elems.challenge - 2, elems.challenge_len + 2,
1790 auth_data->bss->bssid, auth_data->bss->bssid,
1791 auth_data->key, auth_data->key_len,
1792 auth_data->key_idx);
1793}
1794
1795static enum rx_mgmt_action __must_check
1796ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1797 struct ieee80211_mgmt *mgmt, size_t len)
1798{
1799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1800 u8 bssid[ETH_ALEN];
1801 u16 auth_alg, auth_transaction, status_code;
1802 struct sta_info *sta;
1803
1804 lockdep_assert_held(&ifmgd->mtx);
1805
1806 if (len < 24 + 6)
1807 return RX_MGMT_NONE;
1808
1809 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1810 return RX_MGMT_NONE;
1811
1812 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1813
1814 if (memcmp(bssid, mgmt->bssid, ETH_ALEN))
1815 return RX_MGMT_NONE;
1816
1817 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1818 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1819 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1820
1821 if (auth_alg != ifmgd->auth_data->algorithm ||
1822 auth_transaction != ifmgd->auth_data->expected_transaction)
1823 return RX_MGMT_NONE;
1824
1825 if (status_code != WLAN_STATUS_SUCCESS) {
1826 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1827 sdata->name, mgmt->sa, status_code);
1828 goto out;
1829 }
1830
1831 switch (ifmgd->auth_data->algorithm) {
1832 case WLAN_AUTH_OPEN:
1833 case WLAN_AUTH_LEAP:
1834 case WLAN_AUTH_FT:
1835 break;
1836 case WLAN_AUTH_SHARED_KEY:
1837 if (ifmgd->auth_data->expected_transaction != 4) {
1838 ieee80211_auth_challenge(sdata, mgmt, len);
1839 /* need another frame */
1840 return RX_MGMT_NONE;
1841 }
1842 break;
1843 default:
1844 WARN_ONCE(1, "invalid auth alg %d",
1845 ifmgd->auth_data->algorithm);
1846 return RX_MGMT_NONE;
1847 }
1848
1849 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1850 out:
1851 if (ifmgd->auth_data->synced)
1852 drv_finish_tx_sync(sdata->local, sdata, bssid,
1853 IEEE80211_TX_SYNC_AUTH);
1854 ifmgd->auth_data->synced = false;
1855 ifmgd->auth_data->done = true;
1856 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1857 run_again(ifmgd, ifmgd->auth_data->timeout);
1858
1859 /* move station state to auth */
1860 mutex_lock(&sdata->local->sta_mtx);
1861 sta = sta_info_get(sdata, bssid);
1862 if (!sta) {
1863 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1864 goto out_err;
1865 }
1866 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1867 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1868 sdata->name, bssid);
1869 goto out_err;
1870 }
1871 mutex_unlock(&sdata->local->sta_mtx);
1872
1873 return RX_MGMT_CFG80211_RX_AUTH;
1874 out_err:
1875 mutex_unlock(&sdata->local->sta_mtx);
1876 /* ignore frame -- wait for timeout */
1877 return RX_MGMT_NONE;
1878}
1879
1880
77fdaa12
JB		 1881static enum rx_mgmt_action __must_check
1882ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1883 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1884{
46900298 1885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1886 const u8 *bssid = NULL;
f0706e82
JB		 1887 u16 reason_code;
1888
66e67e41
JB		 1889 lockdep_assert_held(&ifmgd->mtx);
1890
f4ea83dd 1891 if (len < 24 + 2)
77fdaa12 1892 return RX_MGMT_NONE;
f0706e82 1893
66e67e41
JB		 1894 if (!ifmgd->associated ||
1895 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
1896 return RX_MGMT_NONE;
77fdaa12 1897
0c1ad2ca 1898 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1899
1900 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1901
77fdaa12 1902 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1903 sdata->name, bssid, reason_code);
77fdaa12 1904
53f73c09 1905 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1906 mutex_lock(&sdata->local->mtx);
63f170e0 1907 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1908 mutex_unlock(&sdata->local->mtx);
f0706e82 1909
77fdaa12 1910 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1911}
1912
1913
77fdaa12
JB		 1914static enum rx_mgmt_action __must_check
1915ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1916 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1917{
46900298 1918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1919 u16 reason_code;
1920
66e67e41 1921 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1922
66e67e41 1923 if (len < 24 + 2)
77fdaa12
JB		 1924 return RX_MGMT_NONE;
1925
66e67e41
JB		 1926 if (!ifmgd->associated ||
1927 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
77fdaa12 1928 return RX_MGMT_NONE;
f0706e82
JB		 1929
1930 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1931
0ff71613 1932 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1933 sdata->name, mgmt->sa, reason_code);
f0706e82 1934
53f73c09 1935 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1936 mutex_lock(&sdata->local->mtx);
bc83b681 1937 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1938 mutex_unlock(&sdata->local->mtx);
77fdaa12 1939 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1940}
1941
c74d084f
CL		 1942static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1943 u8 *supp_rates, unsigned int supp_rates_len,
1944 u32 *rates, u32 *basic_rates,
1945 bool *have_higher_than_11mbit,
1946 int *min_rate, int *min_rate_index)
1947{
1948 int i, j;
1949
1950 for (i = 0; i < supp_rates_len; i++) {
1951 int rate = (supp_rates[i] & 0x7f) * 5;
1952 bool is_basic = !!(supp_rates[i] & 0x80);
1953
1954 if (rate > 110)
1955 *have_higher_than_11mbit = true;
1956
1957 /*
1958 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1959 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1960 *
1961 * Note: Even through the membership selector and the basic
1962 * rate flag share the same bit, they are not exactly
1963 * the same.
1964 */
1965 if (!!(supp_rates[i] & 0x80) &&
1966 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1967 continue;
1968
1969 for (j = 0; j < sband->n_bitrates; j++) {
1970 if (sband->bitrates[j].bitrate == rate) {
1971 *rates |= BIT(j);
1972 if (is_basic)
1973 *basic_rates |= BIT(j);
1974 if (rate < *min_rate) {
1975 *min_rate = rate;
1976 *min_rate_index = j;
1977 }
1978 break;
1979 }
1980 }
1981 }
1982}
f0706e82 1983
66e67e41
JB		 1984static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1985 bool assoc)
1986{
1987 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1988
1989 lockdep_assert_held(&sdata->u.mgd.mtx);
1990
1991 if (assoc_data->synced)
1992 drv_finish_tx_sync(sdata->local, sdata,
1993 assoc_data->bss->bssid,
1994 IEEE80211_TX_SYNC_ASSOC);
1995
1996 if (!assoc) {
1997 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1998
1999 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2000 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2001 }
2002
2003 kfree(assoc_data);
2004 sdata->u.mgd.assoc_data = NULL;
2005}
2006
2007static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2008 struct cfg80211_bss *cbss,
af6b6374 2009 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2010{
46900298 2011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2012 struct ieee80211_local *local = sdata->local;
8318d78a 2013 struct ieee80211_supported_band *sband;
f0706e82 2014 struct sta_info *sta;
af6b6374 2015 u8 *pos;
881d948c 2016 u32 rates, basic_rates;
af6b6374 2017 u16 capab_info, aid;
f0706e82 2018 struct ieee802_11_elems elems;
bda3933a 2019 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2020 u32 changed = 0;
c74d084f 2021 int err;
5d1ec85f 2022 bool have_higher_than_11mbit = false;
ae5eb026 2023 u16 ap_ht_cap_flags;
3432f923 2024 int min_rate = INT_MAX, min_rate_index = -1;
f0706e82 2025
af6b6374 2026 /* AssocResp and ReassocResp have identical structure */
f0706e82 2027
f0706e82 2028 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2029 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2030
1dd84aa2 2031 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 2032 printk(KERN_DEBUG
2033 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2034 sdata->name, aid);
1dd84aa2
JB		 2035 aid &= ~(BIT(15) | BIT(14));
2036
05cb9108
JB		 2037 ifmgd->broken_ap = false;
2038
2039 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2040 printk(KERN_DEBUG
2041 "%s: invalid AID value %d (out of range), turn off PS\n",
2042 sdata->name, aid);
2043 aid = 0;
2044 ifmgd->broken_ap = true;
2045 }
2046
af6b6374
JB		 2047 pos = mgmt->u.assoc_resp.variable;
2048 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2049
f0706e82
JB		 2050 if (!elems.supp_rates) {
2051 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 2052 sdata->name);
af6b6374 2053 return false;
f0706e82
JB		 2054 }
2055
46900298 2056 ifmgd->aid = aid;
f0706e82 2057
2a33bee2
GE		 2058 mutex_lock(&sdata->local->sta_mtx);
2059 /*
2060 * station info was already allocated and inserted before
2061 * the association and should be available to us
2062 */
7852e361 2063 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2064 if (WARN_ON(!sta)) {
2065 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2066 return false;
77fdaa12 2067 }
05e5e883 2068
60f8b39c
JB		 2069 rates = 0;
2070 basic_rates = 0;
66e67e41 2071 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2072
c74d084f
CL		 2073 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
2074 &rates, &basic_rates, &have_higher_than_11mbit,
2075 &min_rate, &min_rate_index);
f0706e82 2076
c74d084f
CL		 2077 ieee80211_get_rates(sband, elems.ext_supp_rates,
2078 elems.ext_supp_rates_len, &rates, &basic_rates,
2079 &have_higher_than_11mbit,
2080 &min_rate, &min_rate_index);
f0706e82 2081
3432f923
EP		 2082 /*
2083 * some buggy APs don't advertise basic_rates. use the lowest
2084 * supported rate instead.
2085 */
2086 if (unlikely(!basic_rates) && min_rate_index >= 0) {
2087 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
2088 "Using min supported rate instead.\n", sdata->name);
2089 basic_rates = BIT(min_rate_index);
2090 }
2091
66e67e41 2092 sta->sta.supp_rates[local->oper_channel->band] = rates;
bda3933a 2093 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 2094
2095 /* cf. IEEE 802.11 9.2.12 */
66e67e41 2096 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 2097 have_higher_than_11mbit)
2098 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2099 else
2100 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2101
ab1faead 2102 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2103 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2104 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 2105
2106 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 2107
4b7679a5 2108 rate_control_rate_init(sta);
f0706e82 2109
46900298 2110 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2111 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2112
ddf4ac53 2113 if (elems.wmm_param)
c2c98fde 2114 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2115
c8987876
JB		 2116 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2117 if (!err)
2118 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2119 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2120 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2121 if (err) {
2122 printk(KERN_DEBUG
2123 "%s: failed to move station %pM to desired state\n",
2124 sdata->name, sta->sta.addr);
2125 WARN_ON(__sta_info_destroy(sta));
2126 mutex_unlock(&sdata->local->sta_mtx);
2127 return false;
2128 }
2129
7852e361 2130 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2131
f2176d72
JO		 2132 /*
2133 * Always handle WMM once after association regardless
2134 * of the first value the AP uses. Setting -1 here has
2135 * that effect because the AP values is an unsigned
2136 * 4-bit value.
2137 */
2138 ifmgd->wmm_last_param_set = -1;
2139
ddf4ac53 2140 if (elems.wmm_param)
4ced3f74 2141 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2142 elems.wmm_param_len);
aa837e1d
JB		 2143 else
2144 ieee80211_set_wmm_default(sdata);
f0706e82 2145
ae5eb026 2146 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 2147 (sdata->local->hw.queues >= 4) &&
ab1faead 2148 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 2149 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 2150 cbss->bssid, ap_ht_cap_flags,
2151 false);
ae5eb026 2152
60f8b39c
JB		 2153 /* set AID and assoc capability,
2154 * ieee80211_set_associated() will tell the driver */
2155 bss_conf->aid = aid;
2156 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2157 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2158
d524215f
FF		 2159 /*
2160 * If we're using 4-addr mode, let the AP know that we're
2161 * doing so, so that it can create the STA VLAN on its side
2162 */
2163 if (ifmgd->use_4addr)
2164 ieee80211_send_4addr_nullfunc(local, sdata);
2165
15b7b062 2166 /*
b291ba11
JB		 2167 * Start timer to probe the connection to the AP now.
2168 * Also start the timer that will detect beacon loss.
15b7b062 2169 */
b291ba11 2170 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2171 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2172
af6b6374 2173 return true;
f0706e82
JB		 2174}
2175
66e67e41
JB		 2176static enum rx_mgmt_action __must_check
2177ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2178 struct ieee80211_mgmt *mgmt, size_t len,
2179 struct cfg80211_bss **bss)
2180{
2181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2182 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2183 u16 capab_info, status_code, aid;
2184 struct ieee802_11_elems elems;
2185 u8 *pos;
2186 bool reassoc;
2187
2188 lockdep_assert_held(&ifmgd->mtx);
2189
2190 if (!assoc_data)
2191 return RX_MGMT_NONE;
2192 if (memcmp(assoc_data->bss->bssid, mgmt->bssid, ETH_ALEN))
2193 return RX_MGMT_NONE;
2194
2195 /*
2196 * AssocResp and ReassocResp have identical structure, so process both
2197 * of them in this function.
2198 */
2199
2200 if (len < 24 + 6)
2201 return RX_MGMT_NONE;
2202
2203 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2204 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2205 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2206 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2207
2208 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2209 "status=%d aid=%d)\n",
2210 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2211 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2212
2213 pos = mgmt->u.assoc_resp.variable;
2214 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2215
2216 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2217 elems.timeout_int && elems.timeout_int_len == 5 &&
2218 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2219 u32 tu, ms;
2220 tu = get_unaligned_le32(elems.timeout_int + 1);
2221 ms = tu * 1024 / 1000;
2222 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2223 "comeback duration %u TU (%u ms)\n",
2224 sdata->name, mgmt->sa, tu, ms);
2225 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2226 if (ms > IEEE80211_ASSOC_TIMEOUT)
2227 run_again(ifmgd, assoc_data->timeout);
2228 return RX_MGMT_NONE;
2229 }
2230
2231 *bss = assoc_data->bss;
2232
2233 if (status_code != WLAN_STATUS_SUCCESS) {
2234 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2235 sdata->name, mgmt->sa, status_code);
2236 ieee80211_destroy_assoc_data(sdata, false);
2237 } else {
2238 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2239
79ebfb85
JB		 2240 /* tell driver about sync done first */
2241 if (assoc_data->synced) {
2242 drv_finish_tx_sync(sdata->local, sdata,
2243 assoc_data->bss->bssid,
2244 IEEE80211_TX_SYNC_ASSOC);
2245 assoc_data->synced = false;
2246 }
f0706e82 2247
66e67e41
JB		 2248 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2249 /* oops -- internal error -- send timeout for now */
79ebfb85 2250 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2251 sta_info_destroy_addr(sdata, mgmt->bssid);
2252 cfg80211_put_bss(*bss);
2253 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2254 }
79ebfb85
JB		 2255
2256 /*
2257 * destroy assoc_data afterwards, as otherwise an idle
2258 * recalc after assoc_data is NULL but before associated
2259 * is set can cause the interface to go idle
2260 */
2261 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2262 }
2263
2264 return RX_MGMT_CFG80211_RX_ASSOC;
2265}
98c8fccf
JB		 2266static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2267 struct ieee80211_mgmt *mgmt,
2268 size_t len,
2269 struct ieee80211_rx_status *rx_status,
2270 struct ieee802_11_elems *elems,
2271 bool beacon)
2272{
2273 struct ieee80211_local *local = sdata->local;
2274 int freq;
c2b13452 2275 struct ieee80211_bss *bss;
98c8fccf 2276 struct ieee80211_channel *channel;
56007a02
JB		 2277 bool need_ps = false;
2278
66e67e41
JB		 2279 if (sdata->u.mgd.associated &&
2280 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
2281 ETH_ALEN) == 0) {
56007a02
JB		 2282 bss = (void *)sdata->u.mgd.associated->priv;
2283 /* not previously set so we may need to recalc */
2284 need_ps = !bss->dtim_period;
2285 }
98c8fccf
JB		 2286
2287 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2288 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2289 rx_status->band);
98c8fccf
JB		 2290 else
2291 freq = rx_status->freq;
2292
2293 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2294
2295 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2296 return;
2297
98c8fccf 2298 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2299 channel, beacon);
77fdaa12
JB		 2300 if (bss)
2301 ieee80211_rx_bss_put(local, bss);
2302
2303 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2304 return;
2305
56007a02
JB		 2306 if (need_ps) {
2307 mutex_lock(&local->iflist_mtx);
2308 ieee80211_recalc_ps(local, -1);
2309 mutex_unlock(&local->iflist_mtx);
2310 }
2311
c481ec97 2312 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2313 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2314 ETH_ALEN) == 0)) {
c481ec97
S		 2315 struct ieee80211_channel_sw_ie *sw_elem =
2316 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2317 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2318 bss, rx_status->mactime);
c481ec97 2319 }
f0706e82
JB		 2320}
2321
2322
f698d856 2323static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2324 struct sk_buff *skb)
f0706e82 2325{
af6b6374 2326 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2327 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2328 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2329 size_t baselen, len = skb->len;
ae6a44e3
EK		 2330 struct ieee802_11_elems elems;
2331
15b7b062
KV		 2332 ifmgd = &sdata->u.mgd;
2333
77fdaa12
JB		 2334 ASSERT_MGD_MTX(ifmgd);
2335
47846c9b 2336 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 2337 return; /* ignore ProbeResp to foreign address */
2338
ae6a44e3
EK		 2339 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2340 if (baselen > len)
2341 return;
2342
2343 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2344 &elems);
2345
98c8fccf 2346 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2347
77fdaa12 2348 if (ifmgd->associated &&
4e5ff376
FF		 2349 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
2350 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2351
2352 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2353 memcmp(mgmt->bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN) == 0) {
2354 /* got probe response, continue with auth */
2355 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2356 ifmgd->auth_data->tries = 0;
2357 ifmgd->auth_data->timeout = jiffies;
2358 run_again(ifmgd, ifmgd->auth_data->timeout);
2359 }
f0706e82
JB		 2360}
2361
d91f36db
JB		 2362/*
2363 * This is the canonical list of information elements we care about,
2364 * the filter code also gives us all changes to the Microsoft OUI
2365 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2366 *
2367 * We implement beacon filtering in software since that means we can
2368 * avoid processing the frame here and in cfg80211, and userspace
2369 * will not be able to tell whether the hardware supports it or not.
2370 *
2371 * XXX: This list needs to be dynamic -- userspace needs to be able to
2372 * add items it requires. It also needs to be able to tell us to
2373 * look out for other vendor IEs.
2374 */
2375static const u64 care_about_ies =
1d4df3a5
JB		 2376 (1ULL << WLAN_EID_COUNTRY) |
2377 (1ULL << WLAN_EID_ERP_INFO) |
2378 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2379 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2380 (1ULL << WLAN_EID_HT_CAPABILITY) |
2381 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 2382
f698d856 2383static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2384 struct ieee80211_mgmt *mgmt,
2385 size_t len,
2386 struct ieee80211_rx_status *rx_status)
2387{
d91f36db 2388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2389 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2390 size_t baselen;
2391 struct ieee802_11_elems elems;
f698d856 2392 struct ieee80211_local *local = sdata->local;
471b3efd 2393 u32 changed = 0;
d91f36db 2394 bool erp_valid, directed_tim = false;
7a5158ef 2395 u8 erp_value = 0;
d91f36db 2396 u32 ncrc;
77fdaa12
JB		 2397 u8 *bssid;
2398
66e67e41 2399 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2400
ae6a44e3
EK		 2401 /* Process beacon from the current BSS */
2402 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2403 if (baselen > len)
2404 return;
2405
d91f36db 2406 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2407 return;
f0706e82 2408
66e67e41
JB		 2409 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
2410 memcmp(mgmt->bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN) == 0) {
2411 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2412 len - baselen, &elems);
77fdaa12 2413
66e67e41
JB		 2414 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2415 false);
2416 ifmgd->assoc_data->have_beacon = true;
2417 ifmgd->assoc_data->sent_assoc = false;
2418 /* continue assoc process */
2419 ifmgd->assoc_data->timeout = jiffies;
2420 run_again(ifmgd, ifmgd->assoc_data->timeout);
2421 return;
2422 }
77fdaa12 2423
66e67e41
JB		 2424 if (!ifmgd->associated ||
2425 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
f0706e82 2426 return;
66e67e41 2427 bssid = ifmgd->associated->bssid;
f0706e82 2428
17e4ec14
JM		 2429 /* Track average RSSI from the Beacon frames of the current AP */
2430 ifmgd->last_beacon_signal = rx_status->signal;
2431 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2432 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2433 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2434 ifmgd->last_cqm_event_signal = 0;
391a200a 2435 ifmgd->count_beacon_signal = 1;
615f7b9b 2436 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2437 } else {
2438 ifmgd->ave_beacon_signal =
2439 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2440 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2441 ifmgd->ave_beacon_signal) / 16;
391a200a 2442 ifmgd->count_beacon_signal++;
17e4ec14 2443 }
615f7b9b
MV		 2444
2445 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2446 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2447 int sig = ifmgd->ave_beacon_signal;
2448 int last_sig = ifmgd->last_ave_beacon_signal;
2449
2450 /*
2451 * if signal crosses either of the boundaries, invoke callback
2452 * with appropriate parameters
2453 */
2454 if (sig > ifmgd->rssi_max_thold &&
2455 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2456 ifmgd->last_ave_beacon_signal = sig;
2457 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2458 } else if (sig < ifmgd->rssi_min_thold &&
2459 (last_sig >= ifmgd->rssi_max_thold ||
2460 last_sig == 0)) {
2461 ifmgd->last_ave_beacon_signal = sig;
2462 drv_rssi_callback(local, RSSI_EVENT_LOW);
2463 }
2464 }
2465
17e4ec14 2466 if (bss_conf->cqm_rssi_thold &&
391a200a 2467 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2468 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2469 int sig = ifmgd->ave_beacon_signal / 16;
2470 int last_event = ifmgd->last_cqm_event_signal;
2471 int thold = bss_conf->cqm_rssi_thold;
2472 int hyst = bss_conf->cqm_rssi_hyst;
2473 if (sig < thold &&
2474 (last_event == 0 || sig < last_event - hyst)) {
2475 ifmgd->last_cqm_event_signal = sig;
2476 ieee80211_cqm_rssi_notify(
2477 &sdata->vif,
2478 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2479 GFP_KERNEL);
2480 } else if (sig > thold &&
2481 (last_event == 0 || sig > last_event + hyst)) {
2482 ifmgd->last_cqm_event_signal = sig;
2483 ieee80211_cqm_rssi_notify(
2484 &sdata->vif,
2485 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2486 GFP_KERNEL);
2487 }
2488 }
2489
b291ba11 2490 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 2491#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2492 if (net_ratelimit()) {
2493 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 2494 "to a received beacon\n", sdata->name);
92778180
JM		 2495 }
2496#endif
b291ba11 2497 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2498 mutex_lock(&local->iflist_mtx);
2499 ieee80211_recalc_ps(local, -1);
2500 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2501 }
2502
b291ba11
JB		 2503 /*
2504 * Push the beacon loss detection into the future since
2505 * we are processing a beacon from the AP just now.
2506 */
d3a910a8 2507 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2508
d91f36db
JB		 2509 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2510 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2511 len - baselen, &elems,
2512 care_about_ies, ncrc);
2513
2514 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2515 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2516 ifmgd->aid);
d91f36db 2517
d8ec4433 2518 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2519 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2520 true);
d91f36db 2521
4ced3f74 2522 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2523 elems.wmm_param_len);
2524 }
fe3fa827 2525
25c9c875 2526 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2527 if (directed_tim) {
572e0012
KV		 2528 if (local->hw.conf.dynamic_ps_timeout > 0) {
2529 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2530 ieee80211_hw_config(local,
2531 IEEE80211_CONF_CHANGE_PS);
2532 ieee80211_send_nullfunc(local, sdata, 0);
2533 } else {
2534 local->pspolling = true;
2535
2536 /*
2537 * Here is assumed that the driver will be
2538 * able to send ps-poll frame and receive a
2539 * response even though power save mode is
2540 * enabled, but some drivers might require
2541 * to disable power save here. This needs
2542 * to be investigated.
2543 */
2544 ieee80211_send_pspoll(local, sdata);
2545 }
a97b77b9
VN		 2546 }
2547 }
7a5158ef 2548
d8ec4433 2549 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2550 return;
2551 ifmgd->beacon_crc = ncrc;
d8ec4433 2552 ifmgd->beacon_crc_valid = true;
30196673 2553
7a5158ef
JB		 2554 if (elems.erp_info && elems.erp_info_len >= 1) {
2555 erp_valid = true;
2556 erp_value = elems.erp_info[0];
2557 } else {
2558 erp_valid = false;
50c4afb9 2559 }
7a5158ef
JB		 2560 changed |= ieee80211_handle_bss_capability(sdata,
2561 le16_to_cpu(mgmt->u.beacon.capab_info),
2562 erp_valid, erp_value);
f0706e82 2563
d3c990fb 2564
53d6f81c 2565 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 2566 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 2567 struct sta_info *sta;
2568 struct ieee80211_supported_band *sband;
2569 u16 ap_ht_cap_flags;
2570
2571 rcu_read_lock();
2572
abe60632 2573 sta = sta_info_get(sdata, bssid);
77fdaa12 2574 if (WARN_ON(!sta)) {
ae5eb026
JB		 2575 rcu_read_unlock();
2576 return;
2577 }
2578
2579 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2580
ef96a842 2581 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
ae5eb026
JB		 2582 elems.ht_cap_elem, &sta->sta.ht_cap);
2583
2584 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2585
2586 rcu_read_unlock();
2587
2588 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 2589 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 2590 }
2591
8b19e6ca 2592 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2593 if (elems.country_elem) {
a8302de9
VT		 2594 /* TODO: IBSS also needs this */
2595 if (elems.pwr_constr_elem)
2596 ieee80211_handle_pwr_constr(sdata,
2597 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2598 elems.pwr_constr_elem,
2599 elems.pwr_constr_elem_len);
3f2355cb
LR		 2600 }
2601
471b3efd 2602 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2603}
2604
1fa57d01
JB		 2605void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2606 struct sk_buff *skb)
f0706e82 2607{
77fdaa12 2608 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2609 struct ieee80211_rx_status *rx_status;
f0706e82 2610 struct ieee80211_mgmt *mgmt;
66e67e41 2611 struct cfg80211_bss *bss = NULL;
77fdaa12 2612 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2613 u16 fc;
2614
f0706e82
JB		 2615 rx_status = (struct ieee80211_rx_status *) skb->cb;
2616 mgmt = (struct ieee80211_mgmt *) skb->data;
2617 fc = le16_to_cpu(mgmt->frame_control);
2618
77fdaa12
JB		 2619 mutex_lock(&ifmgd->mtx);
2620
66e67e41
JB		 2621 switch (fc & IEEE80211_FCTL_STYPE) {
2622 case IEEE80211_STYPE_BEACON:
2623 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2624 break;
2625 case IEEE80211_STYPE_PROBE_RESP:
2626 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2627 break;
2628 case IEEE80211_STYPE_AUTH:
2629 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2630 break;
2631 case IEEE80211_STYPE_DEAUTH:
2632 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2633 break;
2634 case IEEE80211_STYPE_DISASSOC:
2635 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2636 break;
2637 case IEEE80211_STYPE_ASSOC_RESP:
2638 case IEEE80211_STYPE_REASSOC_RESP:
2639 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2640 break;
2641 case IEEE80211_STYPE_ACTION:
2642 switch (mgmt->u.action.category) {
2643 case WLAN_CATEGORY_SPECTRUM_MGMT:
2644 ieee80211_sta_process_chanswitch(sdata,
2645 &mgmt->u.action.u.chan_switch.sw_elem,
2646 (void *)ifmgd->associated->priv,
2647 rx_status->mactime);
77fdaa12 2648 break;
77fdaa12 2649 }
77fdaa12 2650 }
77fdaa12
JB		 2651 mutex_unlock(&ifmgd->mtx);
2652
66e67e41
JB		 2653 switch (rma) {
2654 case RX_MGMT_NONE:
2655 /* no action */
2656 break;
2657 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2658 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2659 break;
2660 case RX_MGMT_CFG80211_DISASSOC:
2661 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2662 break;
2663 case RX_MGMT_CFG80211_RX_AUTH:
2664 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2665 break;
2666 case RX_MGMT_CFG80211_RX_ASSOC:
2667 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2668 break;
2669 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2670 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2671 break;
2672 default:
2673 WARN(1, "unexpected: %d", rma);
b054b747 2674 }
f0706e82
JB		 2675}
2676
9c6bd790 2677static void ieee80211_sta_timer(unsigned long data)
f0706e82 2678{
60f8b39c
JB		 2679 struct ieee80211_sub_if_data *sdata =
2680 (struct ieee80211_sub_if_data *) data;
46900298 2681 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2682 struct ieee80211_local *local = sdata->local;
f0706e82 2683
5bb644a0
JB		 2684 if (local->quiescing) {
2685 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2686 return;
2687 }
2688
64592c8f 2689 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2690}
2691
04ac3c0e 2692static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2693 u8 *bssid, u8 reason)
04ac3c0e
FF		 2694{
2695 struct ieee80211_local *local = sdata->local;
2696 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2697 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2698
2699 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2700 IEEE80211_STA_BEACON_POLL);
2701
02d83e60 2702 ieee80211_set_disassoc(sdata, true, false);
04ac3c0e 2703 mutex_unlock(&ifmgd->mtx);
04ac3c0e
FF		 2704 /*
2705 * must be outside lock due to cfg80211,
2706 * but that's not a problem.
2707 */
2708 ieee80211_send_deauth_disassoc(sdata, bssid,
63c9c5e7 2709 IEEE80211_STYPE_DEAUTH,
5fef7dbc
JB		 2710 reason, false, frame_buf);
2711 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2712
2713 mutex_lock(&local->mtx);
2714 ieee80211_recalc_idle(local);
2715 mutex_unlock(&local->mtx);
2716
04ac3c0e
FF		 2717 mutex_lock(&ifmgd->mtx);
2718}
2719
66e67e41
JB		 2720static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2721{
2722 struct ieee80211_local *local = sdata->local;
2723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2724 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2725
2726 lockdep_assert_held(&ifmgd->mtx);
2727
2728 if (WARN_ON_ONCE(!auth_data))
2729 return -EINVAL;
2730
2731 if (!auth_data->synced) {
2732 int ret = drv_tx_sync(local, sdata, auth_data->bss->bssid,
2733 IEEE80211_TX_SYNC_AUTH);
2734 if (ret)
2735 return ret;
2736 }
2737 auth_data->synced = true;
2738
2739 auth_data->tries++;
2740
2741 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2742 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2743 sdata->name, auth_data->bss->bssid);
2744
2745 /*
2746 * Most likely AP is not in the range so remove the
2747 * bss struct for that AP.
2748 */
2749 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2750
2751 return -ETIMEDOUT;
2752 }
2753
2754 if (auth_data->bss->proberesp_ies) {
2755 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2756 sdata->name, auth_data->bss->bssid, auth_data->tries,
2757 IEEE80211_AUTH_MAX_TRIES);
2758
2759 auth_data->expected_transaction = 2;
2760 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2761 auth_data->ie, auth_data->ie_len,
2762 auth_data->bss->bssid,
2763 auth_data->bss->bssid, NULL, 0, 0);
2764 } else {
2765 const u8 *ssidie;
2766
2767 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2768 sdata->name, auth_data->bss->bssid, auth_data->tries,
2769 IEEE80211_AUTH_MAX_TRIES);
2770
2771 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2772 if (!ssidie)
2773 return -EINVAL;
2774 /*
2775 * Direct probe is sent to broadcast address as some APs
2776 * will not answer to direct packet in unassociated state.
2777 */
2778 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2779 NULL, 0, (u32) -1, true, false);
2780 }
2781
2782 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2783 run_again(ifmgd, auth_data->timeout);
2784
2785 return 0;
2786}
2787
2788static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2789{
2790 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2791 struct ieee80211_local *local = sdata->local;
2792
2793 lockdep_assert_held(&sdata->u.mgd.mtx);
2794
2795 if (!assoc_data->synced) {
2796 int ret = drv_tx_sync(local, sdata, assoc_data->bss->bssid,
2797 IEEE80211_TX_SYNC_ASSOC);
2798 if (ret)
2799 return ret;
2800 }
2801 assoc_data->synced = true;
2802
2803 assoc_data->tries++;
2804 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2805 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2806 sdata->name, assoc_data->bss->bssid);
2807
2808 /*
2809 * Most likely AP is not in the range so remove the
2810 * bss struct for that AP.
2811 */
2812 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2813
2814 return -ETIMEDOUT;
2815 }
2816
2817 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2818 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2819 IEEE80211_ASSOC_MAX_TRIES);
2820 ieee80211_send_assoc(sdata);
2821
2822 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2823 run_again(&sdata->u.mgd, assoc_data->timeout);
2824
2825 return 0;
2826}
2827
1fa57d01 2828void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2829{
9c6bd790 2830 struct ieee80211_local *local = sdata->local;
1fa57d01 2831 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2832
77fdaa12
JB		 2833 mutex_lock(&ifmgd->mtx);
2834
66e67e41
JB		 2835 if (ifmgd->auth_data &&
2836 time_after(jiffies, ifmgd->auth_data->timeout)) {
2837 if (ifmgd->auth_data->done) {
2838 /*
2839 * ok ... we waited for assoc but userspace didn't,
2840 * so let's just kill the auth data
2841 */
2842 ieee80211_destroy_auth_data(sdata, false);
2843 } else if (ieee80211_probe_auth(sdata)) {
2844 u8 bssid[ETH_ALEN];
2845
2846 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2847
2848 ieee80211_destroy_auth_data(sdata, false);
2849
2850 mutex_unlock(&ifmgd->mtx);
2851 cfg80211_send_auth_timeout(sdata->dev, bssid);
2852 mutex_lock(&ifmgd->mtx);
2853 }
2854 } else if (ifmgd->auth_data)
2855 run_again(ifmgd, ifmgd->auth_data->timeout);
2856
2857 if (ifmgd->assoc_data &&
2858 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2859 if (!ifmgd->assoc_data->have_beacon ||
2860 ieee80211_do_assoc(sdata)) {
2861 u8 bssid[ETH_ALEN];
2862
2863 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2864
2865 ieee80211_destroy_assoc_data(sdata, false);
2866
2867 mutex_unlock(&ifmgd->mtx);
2868 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2869 mutex_lock(&ifmgd->mtx);
2870 }
2871 } else if (ifmgd->assoc_data)
2872 run_again(ifmgd, ifmgd->assoc_data->timeout);
2873
b291ba11
JB		 2874 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2875 IEEE80211_STA_CONNECTION_POLL) &&
2876 ifmgd->associated) {
a43abf29 2877 u8 bssid[ETH_ALEN];
72a8a3ed 2878 int max_tries;
a43abf29 2879
0c1ad2ca 2880 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2881
72a8a3ed 2882 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2883 max_tries = max_nullfunc_tries;
72a8a3ed 2884 else
180205bd 2885 max_tries = max_probe_tries;
72a8a3ed 2886
4e5ff376
FF		 2887 /* ACK received for nullfunc probing frame */
2888 if (!ifmgd->probe_send_count)
2889 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2890 else if (ifmgd->nullfunc_failed) {
2891 if (ifmgd->probe_send_count < max_tries) {
2892#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2893 wiphy_debug(local->hw.wiphy,
2894 "%s: No ack for nullfunc frame to"
bfc31df3 2895 " AP %pM, try %d/%i\n",
04ac3c0e 2896 sdata->name, bssid,
bfc31df3 2897 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2898#endif
2899 ieee80211_mgd_probe_ap_send(sdata);
2900 } else {
2901#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2902 wiphy_debug(local->hw.wiphy,
2903 "%s: No ack for nullfunc frame to"
2904 " AP %pM, disconnecting.\n",
c658e5db 2905 sdata->name, bssid);
04ac3c0e 2906#endif
95acac61
JB		 2907 ieee80211_sta_connection_lost(sdata, bssid,
2908 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2909 }
2910 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2911 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2912 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2913#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2914 wiphy_debug(local->hw.wiphy,
2915 "%s: Failed to send nullfunc to AP %pM"
2916 " after %dms, disconnecting.\n",
2917 sdata->name,
180205bd 2918 bssid, probe_wait_ms);
04ac3c0e 2919#endif
95acac61
JB		 2920 ieee80211_sta_connection_lost(sdata, bssid,
2921 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2922 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2923#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2924 wiphy_debug(local->hw.wiphy,
2925 "%s: No probe response from AP %pM"
bfc31df3 2926 " after %dms, try %d/%i\n",
b38afa87 2927 sdata->name,
180205bd 2928 bssid, probe_wait_ms,
bfc31df3 2929 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2930#endif
2931 ieee80211_mgd_probe_ap_send(sdata);
2932 } else {
b291ba11
JB		 2933 /*
2934 * We actually lost the connection ... or did we?
2935 * Let's make sure!
2936 */
b38afa87
BG		 2937 wiphy_debug(local->hw.wiphy,
2938 "%s: No probe response from AP %pM"
2939 " after %dms, disconnecting.\n",
2940 sdata->name,
180205bd 2941 bssid, probe_wait_ms);
04ac3c0e 2942
95acac61
JB		 2943 ieee80211_sta_connection_lost(sdata, bssid,
2944 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2945 }
2946 }
2947
77fdaa12 2948 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2949
2950 mutex_lock(&local->mtx);
2951 ieee80211_recalc_idle(local);
2952 mutex_unlock(&local->mtx);
f0706e82
JB		 2953}
2954
b291ba11
JB		 2955static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2956{
2957 struct ieee80211_sub_if_data *sdata =
2958 (struct ieee80211_sub_if_data *) data;
2959 struct ieee80211_local *local = sdata->local;
2960
2961 if (local->quiescing)
2962 return;
2963
1e4dcd01
JO		 2964 ieee80211_queue_work(&sdata->local->hw,
2965 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2966}
2967
2968static void ieee80211_sta_conn_mon_timer(unsigned long data)
2969{
2970 struct ieee80211_sub_if_data *sdata =
2971 (struct ieee80211_sub_if_data *) data;
2972 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2973 struct ieee80211_local *local = sdata->local;
2974
2975 if (local->quiescing)
2976 return;
2977
42935eca 2978 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2979}
2980
2981static void ieee80211_sta_monitor_work(struct work_struct *work)
2982{
2983 struct ieee80211_sub_if_data *sdata =
2984 container_of(work, struct ieee80211_sub_if_data,
2985 u.mgd.monitor_work);
2986
2987 ieee80211_mgd_probe_ap(sdata, false);
2988}
2989
9c6bd790
JB		 2990static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2991{
494f1fe5
EP		 2992 u32 flags;
2993
ad935687 2994 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2995 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2996 IEEE80211_STA_CONNECTION_POLL);
ad935687 2997
b291ba11 2998 /* let's probe the connection once */
494f1fe5
EP		 2999 flags = sdata->local->hw.flags;
3000 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3001 ieee80211_queue_work(&sdata->local->hw,
3002 &sdata->u.mgd.monitor_work);
b291ba11 3003 /* and do all the other regular work too */
64592c8f 3004 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3005 }
9c6bd790 3006}
f0706e82 3007
5bb644a0
JB		 3008#ifdef CONFIG_PM
3009void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3010{
3011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3012
3013 /*
3014 * we need to use atomic bitops for the running bits
3015 * only because both timers might fire at the same
3016 * time -- the code here is properly synchronised.
3017 */
3018
d1f5b7a3
JB		 3019 cancel_work_sync(&ifmgd->request_smps_work);
3020
0ecfe806 3021 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3022 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 3023 if (del_timer_sync(&ifmgd->timer))
3024 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3025
3026 cancel_work_sync(&ifmgd->chswitch_work);
3027 if (del_timer_sync(&ifmgd->chswitch_timer))
3028 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3029
b291ba11
JB		 3030 /* these will just be re-established on connection */
3031 del_timer_sync(&ifmgd->conn_mon_timer);
3032 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3033}
3034
3035void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3036{
3037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3038
676b58c2
RM		 3039 if (!ifmgd->associated)
3040 return;
3041
95acac61
JB		 3042 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3043 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3044 mutex_lock(&ifmgd->mtx);
3045 if (ifmgd->associated) {
3046#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
3047 wiphy_debug(sdata->local->hw.wiphy,
3048 "%s: driver requested disconnect after resume.\n",
3049 sdata->name);
3050#endif
3051 ieee80211_sta_connection_lost(sdata,
3052 ifmgd->associated->bssid,
3053 WLAN_REASON_UNSPECIFIED);
3054 mutex_unlock(&ifmgd->mtx);
3055 return;
3056 }
3057 mutex_unlock(&ifmgd->mtx);
3058 }
3059
5bb644a0
JB		 3060 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3061 add_timer(&ifmgd->timer);
3062 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3063 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3064 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 3065 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 3066}
3067#endif
3068
9c6bd790
JB		 3069/* interface setup */
3070void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3071{
46900298 3072 struct ieee80211_if_managed *ifmgd;
988c0f72 3073
46900298 3074 ifmgd = &sdata->u.mgd;
b291ba11 3075 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3076 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3077 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3078 ieee80211_beacon_connection_loss_work);
d1f5b7a3 3079 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3080 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3081 (unsigned long) sdata);
b291ba11
JB		 3082 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3083 (unsigned long) sdata);
3084 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3085 (unsigned long) sdata);
46900298 3086 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3087 (unsigned long) sdata);
9c6bd790 3088
ab1faead 3089 ifmgd->flags = 0;
1478acb3 3090 ifmgd->powersave = sdata->wdev.ps;
bbbdff9e 3091
77fdaa12 3092 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3093
3094 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3095 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3096 else
3097 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3098}
3099
77fdaa12
JB		 3100/* scan finished notification */
3101void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3102{
77fdaa12 3103 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 3104
77fdaa12
JB		 3105 /* Restart STA timers */
3106 rcu_read_lock();
3107 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3108 ieee80211_restart_sta_timer(sdata);
3109 rcu_read_unlock();
3110}
60f8b39c 3111
77fdaa12
JB		 3112int ieee80211_max_network_latency(struct notifier_block *nb,
3113 unsigned long data, void *dummy)
3114{
3115 s32 latency_usec = (s32) data;
3116 struct ieee80211_local *local =
3117 container_of(nb, struct ieee80211_local,
3118 network_latency_notifier);
1fa6f4af 3119
77fdaa12
JB		 3120 mutex_lock(&local->iflist_mtx);
3121 ieee80211_recalc_ps(local, latency_usec);
3122 mutex_unlock(&local->iflist_mtx);
dfe67012 3123
77fdaa12 3124 return 0;
9c6bd790
JB		 3125}
3126
77fdaa12
JB		 3127/* config hooks */
3128int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3129 struct cfg80211_auth_request *req)
9c6bd790 3130{
66e67e41
JB		 3131 struct ieee80211_local *local = sdata->local;
3132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3133 struct ieee80211_mgd_auth_data *auth_data;
3134 struct sta_info *sta;
77fdaa12 3135 u16 auth_alg;
66e67e41
JB		 3136 int err;
3137
3138 /* prepare auth data structure */
9c6bd790 3139
77fdaa12
JB		 3140 switch (req->auth_type) {
3141 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3142 auth_alg = WLAN_AUTH_OPEN;
3143 break;
3144 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3145 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3146 return -EOPNOTSUPP;
77fdaa12
JB		 3147 auth_alg = WLAN_AUTH_SHARED_KEY;
3148 break;
3149 case NL80211_AUTHTYPE_FT:
3150 auth_alg = WLAN_AUTH_FT;
3151 break;
3152 case NL80211_AUTHTYPE_NETWORK_EAP:
3153 auth_alg = WLAN_AUTH_LEAP;
3154 break;
3155 default:
3156 return -EOPNOTSUPP;
60f8b39c 3157 }
77fdaa12 3158
66e67e41
JB		 3159 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3160 if (!auth_data)
9c6bd790 3161 return -ENOMEM;
77fdaa12 3162
66e67e41 3163 auth_data->bss = req->bss;
77fdaa12
JB		 3164
3165 if (req->ie && req->ie_len) {
66e67e41
JB		 3166 memcpy(auth_data->ie, req->ie, req->ie_len);
3167 auth_data->ie_len = req->ie_len;
9c6bd790 3168 }
77fdaa12 3169
fffd0934 3170 if (req->key && req->key_len) {
66e67e41
JB		 3171 auth_data->key_len = req->key_len;
3172 auth_data->key_idx = req->key_idx;
3173 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3174 }
3175
66e67e41 3176 auth_data->algorithm = auth_alg;
60f8b39c 3177
66e67e41 3178 /* try to authenticate/probe */
2a33bee2 3179
66e67e41 3180 mutex_lock(&ifmgd->mtx);
2a33bee2 3181
66e67e41
JB		 3182 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3183 ifmgd->assoc_data) {
3184 err = -EBUSY;
3185 goto err_free;
2a33bee2
GE		 3186 }
3187
66e67e41
JB		 3188 if (ifmgd->auth_data)
3189 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3190
66e67e41
JB		 3191 /* prep auth_data so we don't go into idle on disassoc */
3192 ifmgd->auth_data = auth_data;
af6b6374 3193
66e67e41
JB		 3194 if (ifmgd->associated)
3195 ieee80211_set_disassoc(sdata, true, false);
af6b6374 3196
66e67e41
JB		 3197 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3198 sdata->name, req->bss->bssid);
e5b900d2 3199
66e67e41
JB		 3200 mutex_lock(&local->mtx);
3201 ieee80211_recalc_idle(sdata->local);
3202 mutex_unlock(&local->mtx);
e5b900d2 3203
66e67e41
JB		 3204 /* switch to the right channel */
3205 local->oper_channel = req->bss->channel;
3206 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
af6b6374 3207
66e67e41
JB		 3208 /* set BSSID */
3209 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3210 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
b2abb6e2 3211
66e67e41
JB		 3212 /* add station entry */
3213 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3214 if (!sta) {
3215 err = -ENOMEM;
3216 goto err_clear;
3217 }
68542962 3218
66e67e41
JB		 3219 err = sta_info_insert(sta);
3220 if (err) {
3221 printk(KERN_DEBUG
3222 "%s: failed to insert STA entry for the AP %pM (error %d)\n",
3223 sdata->name, req->bss->bssid, err);
3224 goto err_clear;
af6b6374
JB		 3225 }
3226
66e67e41
JB		 3227 err = ieee80211_probe_auth(sdata);
3228 if (err) {
3229 if (auth_data->synced)
3230 drv_finish_tx_sync(local, sdata, req->bss->bssid,
3231 IEEE80211_TX_SYNC_AUTH);
3232 sta_info_destroy_addr(sdata, req->bss->bssid);
3233 goto err_clear;
3234 }
3235
3236 /* hold our own reference */
3237 cfg80211_ref_bss(auth_data->bss);
3238 err = 0;
3239 goto out_unlock;
3240
3241 err_clear:
3242 ifmgd->auth_data = NULL;
3243 err_free:
3244 kfree(auth_data);
3245 out_unlock:
3246 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3247
66e67e41 3248 return err;
af6b6374
JB		 3249}
3250
77fdaa12
JB		 3251int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3252 struct cfg80211_assoc_request *req)
f0706e82 3253{
66e67e41 3254 struct ieee80211_local *local = sdata->local;
77fdaa12 3255 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3256 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41
JB		 3257 struct ieee80211_mgd_assoc_data *assoc_data;
3258 struct sta_info *sta;
3259 const u8 *ssidie;
2a33bee2 3260 int i, err;
f0706e82 3261
66e67e41
JB		 3262 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3263 if (!ssidie)
3264 return -EINVAL;
3265
3266 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3267 if (!assoc_data)
3268 return -ENOMEM;
3269
77fdaa12 3270 mutex_lock(&ifmgd->mtx);
9c87ba67 3271
66e67e41 3272 if (ifmgd->associated)
53f73c09 3273 ieee80211_set_disassoc(sdata, true, false);
66e67e41
JB		 3274
3275 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3276 err = -EBUSY;
3277 goto err_free;
af6b6374 3278 }
77fdaa12 3279
66e67e41
JB		 3280 if (ifmgd->assoc_data) {
3281 err = -EBUSY;
3282 goto err_free;
3283 }
77fdaa12 3284
66e67e41
JB		 3285 if (ifmgd->auth_data) {
3286 bool match;
3287
3288 /* keep sta info, bssid if matching */
3289 match = memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN) == 0;
3290 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3291 }
3292
66e67e41
JB		 3293 /* prepare assoc data */
3294
77fdaa12 3295 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3296 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3297
d8ec4433
JO		 3298 ifmgd->beacon_crc_valid = false;
3299
77fdaa12
JB		 3300 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3301 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3302 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3303 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3304 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3305
ef96a842
BG		 3306 if (req->flags & ASSOC_REQ_DISABLE_HT)
3307 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3308
3309 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3310 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3311 sizeof(ifmgd->ht_capa_mask));
3312
77fdaa12 3313 if (req->ie && req->ie_len) {
66e67e41
JB		 3314 memcpy(assoc_data->ie, req->ie, req->ie_len);
3315 assoc_data->ie_len = req->ie_len;
3316 }
f679f65d 3317
66e67e41 3318 assoc_data->bss = req->bss;
f679f65d 3319
af6b6374
JB		 3320 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3321 if (ifmgd->powersave)
3322 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3323 else
3324 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3325 } else
3326 ifmgd->ap_smps = ifmgd->req_smps;
3327
77c8144a
JB		 3328 /*
3329 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3330 * We still associate in non-HT mode (11a/b/g) if any one of these
3331 * ciphers is configured as pairwise.
3332 * We can set this to true for non-11n hardware, that'll be checked
3333 * separately along with the peer capabilities.
3334 */
66e67e41
JB		 3335 assoc_data->capability = req->bss->capability;
3336 assoc_data->wmm_used = bss->wmm_used;
3337 assoc_data->supp_rates = bss->supp_rates;
3338 assoc_data->supp_rates_len = bss->supp_rates_len;
3339 assoc_data->ht_information_ie =
f679f65d 3340 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 3341
ab13315a
KV		 3342 if (bss->wmm_used && bss->uapsd_supported &&
3343 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
66e67e41 3344 assoc_data->uapsd_used = true;
ab13315a
KV		 3345 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3346 } else {
66e67e41 3347 assoc_data->uapsd_used = false;
ab13315a
KV		 3348 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3349 }
3350
66e67e41
JB		 3351 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3352 assoc_data->ssid_len = ssidie[1];
63f170e0 3353
77fdaa12 3354 if (req->prev_bssid)
66e67e41 3355 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3356
3357 if (req->use_mfp) {
3358 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3359 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3360 } else {
3361 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3362 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3363 }
3364
3365 if (req->crypto.control_port)
3366 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3367 else
3368 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3369
a621fa4d
JB		 3370 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3371 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3372
66e67e41
JB		 3373 /* kick off associate process */
3374
3375 ifmgd->assoc_data = assoc_data;
3376
3377 mutex_lock(&local->mtx);
3378 ieee80211_recalc_idle(sdata->local);
3379 mutex_unlock(&local->mtx);
3380
3381 /* switch to the right channel */
3382 local->oper_channel = req->bss->channel;
3383 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3384
3385 rcu_read_lock();
3386 sta = sta_info_get(sdata, req->bss->bssid);
3387 rcu_read_unlock();
3388
3389 if (!sta) {
3390 /* set BSSID */
3391 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3392 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3393
3394 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3395 if (!sta) {
3396 err = -ENOMEM;
3397 goto err_clear;
3398 }
3399
3400 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3401
3402 err = sta_info_insert(sta);
3403 sta = NULL;
3404 if (err) {
3405 printk(KERN_DEBUG
3406 "%s: failed to insert STA entry for the AP (error %d)\n",
3407 sdata->name, err);
3408 goto err_clear;
3409 }
3410 } else
3411 WARN_ON_ONCE(memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN));
3412
3413 if (!bss->dtim_period &&
3414 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3415 /*
3416 * Wait up to one beacon interval ...
3417 * should this be more if we miss one?
3418 */
3419 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3420 sdata->name, ifmgd->bssid);
3421 assoc_data->timeout = jiffies +
3422 TU_TO_EXP_TIME(req->bss->beacon_interval);
3423 } else {
3424 assoc_data->have_beacon = true;
3425 assoc_data->sent_assoc = false;
3426 assoc_data->timeout = jiffies;
3427 }
3428 run_again(ifmgd, assoc_data->timeout);
3429
3430 err = 0;
3431 goto out;
3432 err_clear:
3433 ifmgd->assoc_data = NULL;
3434 err_free:
3435 kfree(assoc_data);
3436 out:
3437 mutex_unlock(&ifmgd->mtx);
3438
3439 return err;
f0706e82
JB		 3440}
3441
77fdaa12 3442int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3443 struct cfg80211_deauth_request *req)
f0706e82 3444{
46900298 3445 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
05e48e8e 3446 bool assoc_bss = false;
5fef7dbc 3447 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3448
77fdaa12
JB		 3449 mutex_lock(&ifmgd->mtx);
3450
95de817b
JB		 3451 if (ifmgd->associated &&
3452 memcmp(ifmgd->associated->bssid, req->bssid, ETH_ALEN) == 0) {
53f73c09 3453 ieee80211_set_disassoc(sdata, false, true);
05e48e8e 3454 assoc_bss = true;
66e67e41
JB		 3455 } else if (ifmgd->auth_data) {
3456 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3457 mutex_unlock(&ifmgd->mtx);
66e67e41 3458 return 0;
af6b6374 3459 }
66e67e41 3460 mutex_unlock(&ifmgd->mtx);
77fdaa12 3461
0ff71613 3462 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3463 sdata->name, req->bssid, req->reason_code);
0ff71613 3464
63c9c5e7
JB		 3465 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3466 IEEE80211_STYPE_DEAUTH,
5fef7dbc
JB		 3467 req->reason_code, true, frame_buf);
3468 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
05e48e8e 3469 if (assoc_bss)
07ba55d7 3470 sta_info_flush(sdata->local, sdata);
f0706e82 3471
7da7cc1d 3472 mutex_lock(&sdata->local->mtx);
bc83b681 3473 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3474 mutex_unlock(&sdata->local->mtx);
bc83b681 3475
f0706e82
JB		 3476 return 0;
3477}
84363e6e 3478
77fdaa12 3479int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3480 struct cfg80211_disassoc_request *req)
9c6bd790 3481{
77fdaa12 3482 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3483 u8 bssid[ETH_ALEN];
5fef7dbc 3484 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3485
77fdaa12 3486 mutex_lock(&ifmgd->mtx);
10f644a4 3487
8d8b261a
JB		 3488 /*
3489 * cfg80211 should catch this ... but it's racy since
3490 * we can receive a disassoc frame, process it, hand it
3491 * to cfg80211 while that's in a locked section already
3492 * trying to tell us that the user wants to disconnect.
3493 */
0c1ad2ca 3494 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3495 mutex_unlock(&ifmgd->mtx);
3496 return -ENOLINK;
3497 }
3498
0ff71613 3499 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3500 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3501
e69e95db 3502 memcpy(bssid, req->bss->bssid, ETH_ALEN);
02d83e60 3503 ieee80211_set_disassoc(sdata, false, !req->local_state_change);
77fdaa12
JB		 3504
3505 mutex_unlock(&ifmgd->mtx);
10f644a4 3506
77fdaa12 3507 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
5fef7dbc
JB		 3508 IEEE80211_STYPE_DISASSOC,
3509 req->reason_code,
3510 !req->local_state_change, frame_buf);
3511 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
07ba55d7 3512 sta_info_flush(sdata->local, sdata);
bc83b681 3513
7da7cc1d 3514 mutex_lock(&sdata->local->mtx);
bc83b681 3515 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3516 mutex_unlock(&sdata->local->mtx);
bc83b681 3517
10f644a4
JB		 3518 return 0;
3519}
026331c4 3520
54e4ffb2
JB		 3521void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3522{
3523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3524
3525 mutex_lock(&ifmgd->mtx);
3526 if (ifmgd->assoc_data)
3527 ieee80211_destroy_assoc_data(sdata, false);
3528 if (ifmgd->auth_data)
3529 ieee80211_destroy_auth_data(sdata, false);
3530 del_timer_sync(&ifmgd->timer);
3531 mutex_unlock(&ifmgd->mtx);
3532}
3533
a97c13c3
JO		 3534void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3535 enum nl80211_cqm_rssi_threshold_event rssi_event,
3536 gfp_t gfp)
3537{
3538 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3539
b5878a2d
JB		 3540 trace_api_cqm_rssi_notify(sdata, rssi_event);
3541
a97c13c3
JO		 3542 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3543}
3544EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3545
3546unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3547{
3548 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3549 return sdata->dev->operstate;
3550}
3551EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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