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NFC: NCI code identation fixes
[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 1279 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1280}
1281
7a5158ef
JB		 1282static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1283 u16 capab, bool erp_valid, u8 erp)
5628221c 1284{
bda3933a 1285 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1286 u32 changed = 0;
7a5158ef
JB		 1287 bool use_protection;
1288 bool use_short_preamble;
1289 bool use_short_slot;
1290
1291 if (erp_valid) {
1292 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1293 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1294 } else {
1295 use_protection = false;
1296 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1297 }
1298
1299 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1300 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1301 use_short_slot = true;
5628221c 1302
471b3efd 1303 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1304 bss_conf->use_cts_prot = use_protection;
1305 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1306 }
7e9ed188 1307
d43c7b37 1308 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1309 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1310 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1311 }
d9430a32 1312
7a5158ef 1313 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1314 bss_conf->use_short_slot = use_short_slot;
1315 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1316 }
1317
1318 return changed;
1319}
1320
f698d856 1321static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1322 struct cfg80211_bss *cbss,
ae5eb026 1323 u32 bss_info_changed)
f0706e82 1324{
0c1ad2ca 1325 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1326 struct ieee80211_local *local = sdata->local;
68542962 1327 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1328
ae5eb026 1329 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1330 /* set timing information */
68542962
JO		 1331 bss_conf->beacon_int = cbss->beacon_interval;
1332 bss_conf->timestamp = cbss->tsf;
5628221c 1333
77fdaa12
JB		 1334 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1335 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1336 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1337
7ccc8bd7
FF		 1338 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1339 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1340
0c1ad2ca
JB		 1341 sdata->u.mgd.associated = cbss;
1342 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1343
17e4ec14
JM		 1344 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1345
b291ba11
JB		 1346 /* just to be sure */
1347 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1348 IEEE80211_STA_BEACON_POLL);
1349
9ac19a90 1350 ieee80211_led_assoc(local, 1);
9306102e 1351
e5b900d2
JB		 1352 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1353 bss_conf->dtim_period = bss->dtim_period;
1354 else
1355 bss_conf->dtim_period = 0;
1356
68542962 1357 bss_conf->assoc = 1;
96dd22ac
JB		 1358 /*
1359 * For now just always ask the driver to update the basic rateset
1360 * when we have associated, we aren't checking whether it actually
1361 * changed or not.
1362 */
ae5eb026 1363 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1364
1365 /* And the BSSID changed - we're associated now */
1366 bss_info_changed |= BSS_CHANGED_BSSID;
1367
a97c13c3 1368 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1369 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1370 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1371 bss_info_changed |= BSS_CHANGED_CQM;
1372
68542962
JO		 1373 /* Enable ARP filtering */
1374 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1375 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1376 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1377 }
1378
ae5eb026 1379 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1380
056508dc
JB		 1381 mutex_lock(&local->iflist_mtx);
1382 ieee80211_recalc_ps(local, -1);
025e6be2 1383 ieee80211_recalc_smps(local);
056508dc 1384 mutex_unlock(&local->iflist_mtx);
e0cb686f 1385
8a5b33f5 1386 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1387 netif_carrier_on(sdata->dev);
f0706e82
JB		 1388}
1389
e69e95db 1390static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1391 u16 stype, u16 reason, bool tx,
1392 u8 *frame_buf)
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
37ad3888
JB		 1402 if (WARN_ON_ONCE(tx && !frame_buf))
1403 return;
1404
b291ba11
JB		 1405 if (WARN_ON(!ifmgd->associated))
1406 return;
1407
0c1ad2ca 1408 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1409
77fdaa12
JB		 1410 ifmgd->associated = NULL;
1411 memset(ifmgd->bssid, 0, ETH_ALEN);
1412
1413 /*
1414 * we need to commit the associated = NULL change because the
1415 * scan code uses that to determine whether this iface should
1416 * go to/wake up from powersave or not -- and could otherwise
1417 * wake the queues erroneously.
1418 */
1419 smp_mb();
1420
1421 /*
1422 * Thus, we can only afterwards stop the queues -- to account
1423 * for the case where another CPU is finishing a scan at this
1424 * time -- we don't want the scan code to enable queues.
1425 */
aa458d17 1426
8a5b33f5 1427 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1428 netif_carrier_off(sdata->dev);
1429
2a419056 1430 mutex_lock(&local->sta_mtx);
abe60632 1431 sta = sta_info_get(sdata, bssid);
4cad6c7c 1432 if (sta) {
c2c98fde 1433 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1434 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1435 }
2a419056 1436 mutex_unlock(&local->sta_mtx);
aa458d17 1437
37ad3888
JB		 1438 /* deauthenticate/disassociate now */
1439 if (tx || frame_buf)
1440 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1441 tx, frame_buf);
1442
1443 /* flush out frame */
1444 if (tx)
1445 drv_flush(local, false);
1446
1447 /* remove AP and TDLS peers */
1448 sta_info_flush(local, sdata);
1449
1450 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1451 changed |= ieee80211_reset_erp_info(sdata);
1452
f5e5bf25 1453 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1454 changed |= BSS_CHANGED_ASSOC;
1455 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1456
4797938c 1457 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1458 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1459
413ad50a
JB		 1460 /* on the next assoc, re-program HT parameters */
1461 sdata->ht_opmode_valid = false;
ef96a842
BG		 1462 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1463 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1464
a8302de9
VT		 1465 local->power_constr_level = 0;
1466
520eb820
KV		 1467 del_timer_sync(&local->dynamic_ps_timer);
1468 cancel_work_sync(&local->dynamic_ps_enable_work);
1469
e0cb686f
KV		 1470 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1471 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1472 config_changed |= IEEE80211_CONF_CHANGE_PS;
1473 }
a331400b 1474 local->ps_sdata = NULL;
ae5eb026 1475
e0cb686f 1476 ieee80211_hw_config(local, config_changed);
9cef8737 1477
68542962
JO		 1478 /* Disable ARP filtering */
1479 if (sdata->vif.bss_conf.arp_filter_enabled) {
1480 sdata->vif.bss_conf.arp_filter_enabled = false;
1481 changed |= BSS_CHANGED_ARP_FILTER;
1482 }
1483
3abead59
JB		 1484 sdata->vif.bss_conf.qos = false;
1485 changed |= BSS_CHANGED_QOS;
1486
0aaffa9b
JB		 1487 /* The BSSID (not really interesting) and HT changed */
1488 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1489 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1490
3abead59
JB		 1491 /* disassociated - set to defaults now */
1492 ieee80211_set_wmm_default(sdata, false);
1493
b9dcf712
JB		 1494 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1495 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1496 del_timer_sync(&sdata->u.mgd.timer);
1497 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1498}
f0706e82 1499
3cf335d5
KV		 1500void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1501 struct ieee80211_hdr *hdr)
1502{
1503 /*
1504 * We can postpone the mgd.timer whenever receiving unicast frames
1505 * from AP because we know that the connection is working both ways
1506 * at that time. But multicast frames (and hence also beacons) must
1507 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1508 * data idle periods for sending the periodic probe request to the
1509 * AP we're connected to.
3cf335d5 1510 */
b291ba11
JB		 1511 if (is_multicast_ether_addr(hdr->addr1))
1512 return;
1513
be099e82 1514 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1515}
f0706e82 1516
4e5ff376
FF		 1517static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1518{
1519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1520
1521 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1522 IEEE80211_STA_CONNECTION_POLL)))
1523 return;
1524
1525 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1526 IEEE80211_STA_BEACON_POLL);
1527 mutex_lock(&sdata->local->iflist_mtx);
1528 ieee80211_recalc_ps(sdata->local, -1);
1529 mutex_unlock(&sdata->local->iflist_mtx);
1530
1531 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1532 return;
1533
1534 /*
1535 * We've received a probe response, but are not sure whether
1536 * we have or will be receiving any beacons or data, so let's
1537 * schedule the timers again, just in case.
1538 */
1539 ieee80211_sta_reset_beacon_monitor(sdata);
1540
1541 mod_timer(&ifmgd->conn_mon_timer,
1542 round_jiffies_up(jiffies +
1543 IEEE80211_CONNECTION_IDLE_TIME));
1544}
1545
1546void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1547 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1548{
75706d0e 1549 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1550 return;
1551
04ac3c0e
FF		 1552 if (ack)
1553 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1554
1555 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1556 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1557 if (ack)
1558 sdata->u.mgd.probe_send_count = 0;
1559 else
1560 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1561 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1562 }
1563}
1564
a43abf29
ML		 1565static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1566{
1567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1568 const u8 *ssid;
f01a067d 1569 u8 *dst = ifmgd->associated->bssid;
180205bd 1570 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1571
1572 /*
1573 * Try sending broadcast probe requests for the last three
1574 * probe requests after the first ones failed since some
1575 * buggy APs only support broadcast probe requests.
1576 */
1577 if (ifmgd->probe_send_count >= unicast_limit)
1578 dst = NULL;
a43abf29 1579
4e5ff376
FF		 1580 /*
1581 * When the hardware reports an accurate Tx ACK status, it's
1582 * better to send a nullfunc frame instead of a probe request,
1583 * as it will kick us off the AP quickly if we aren't associated
1584 * anymore. The timeout will be reset if the frame is ACKed by
1585 * the AP.
1586 */
04ac3c0e
FF		 1587 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1588 ifmgd->nullfunc_failed = false;
4e5ff376 1589 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1590 } else {
4e5ff376 1591 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1592 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1593 (u32) -1, true, false);
4e5ff376 1594 }
a43abf29
ML		 1595
1596 ifmgd->probe_send_count++;
180205bd 1597 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1598 run_again(ifmgd, ifmgd->probe_timeout);
1599}
1600
b291ba11
JB		 1601static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1602 bool beacon)
04de8381 1603{
04de8381 1604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1605 bool already = false;
34bfc411 1606
9607e6b6 1607 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1608 return;
1609
91a3bd76
LR		 1610 if (sdata->local->scanning)
1611 return;
1612
b8bc4b0a
JB		 1613 if (sdata->local->tmp_channel)
1614 return;
1615
77fdaa12
JB		 1616 mutex_lock(&ifmgd->mtx);
1617
1618 if (!ifmgd->associated)
1619 goto out;
1620
a860402d 1621#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1622 if (beacon && net_ratelimit())
1623 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1624 "- sending probe request\n", sdata->name);
a860402d 1625#endif
04de8381 1626
b291ba11
JB		 1627 /*
1628 * The driver/our work has already reported this event or the
1629 * connection monitoring has kicked in and we have already sent
1630 * a probe request. Or maybe the AP died and the driver keeps
1631 * reporting until we disassociate...
1632 *
1633 * In either case we have to ignore the current call to this
1634 * function (except for setting the correct probe reason bit)
1635 * because otherwise we would reset the timer every time and
1636 * never check whether we received a probe response!
1637 */
1638 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1639 IEEE80211_STA_CONNECTION_POLL))
1640 already = true;
1641
1642 if (beacon)
1643 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1644 else
1645 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1646
1647 if (already)
1648 goto out;
1649
4e751843
JB		 1650 mutex_lock(&sdata->local->iflist_mtx);
1651 ieee80211_recalc_ps(sdata->local, -1);
1652 mutex_unlock(&sdata->local->iflist_mtx);
1653
a43abf29
ML		 1654 ifmgd->probe_send_count = 0;
1655 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1656 out:
1657 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1658}
1659
a619a4c0
JO		 1660struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1661 struct ieee80211_vif *vif)
1662{
1663 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1664 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1665 struct sk_buff *skb;
1666 const u8 *ssid;
1667
1668 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1669 return NULL;
1670
1671 ASSERT_MGD_MTX(ifmgd);
1672
1673 if (!ifmgd->associated)
1674 return NULL;
1675
1676 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1677 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1678 (u32) -1, ssid + 2, ssid[1],
1679 NULL, 0, true);
a619a4c0
JO		 1680
1681 return skb;
1682}
1683EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1684
1e4dcd01
JO		 1685static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1686{
1687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1688 struct ieee80211_local *local = sdata->local;
1689 u8 bssid[ETH_ALEN];
5fef7dbc 1690 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1691
1692 mutex_lock(&ifmgd->mtx);
1693 if (!ifmgd->associated) {
1694 mutex_unlock(&ifmgd->mtx);
1695 return;
1696 }
1697
1698 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1699
180205bd
BG		 1700 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1701 sdata->name, bssid);
1e4dcd01 1702
37ad3888
JB		 1703 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1704 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1705 false, frame_buf);
1e4dcd01 1706 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1707
1e4dcd01
JO		 1708 /*
1709 * must be outside lock due to cfg80211,
1710 * but that's not a problem.
1711 */
5fef7dbc 1712 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1713
1714 mutex_lock(&local->mtx);
1715 ieee80211_recalc_idle(local);
1716 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1717}
1718
1719void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1720{
1721 struct ieee80211_sub_if_data *sdata =
1722 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1723 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1725 struct sta_info *sta;
1726
1727 if (ifmgd->associated) {
30fa9047 1728 rcu_read_lock();
a85e1d55
PS		 1729 sta = sta_info_get(sdata, ifmgd->bssid);
1730 if (sta)
1731 sta->beacon_loss_count++;
30fa9047 1732 rcu_read_unlock();
a85e1d55 1733 }
b291ba11 1734
1e4dcd01
JO		 1735 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1736 __ieee80211_connection_loss(sdata);
1737 else
1738 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1739}
1740
04de8381
KV		 1741void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1742{
1743 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1744 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1745
b5878a2d
JB		 1746 trace_api_beacon_loss(sdata);
1747
1e4dcd01
JO		 1748 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1749 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1750}
1751EXPORT_SYMBOL(ieee80211_beacon_loss);
1752
1e4dcd01
JO		 1753void ieee80211_connection_loss(struct ieee80211_vif *vif)
1754{
1755 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1756 struct ieee80211_hw *hw = &sdata->local->hw;
1757
b5878a2d
JB		 1758 trace_api_connection_loss(sdata);
1759
1e4dcd01
JO		 1760 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1761 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1762}
1763EXPORT_SYMBOL(ieee80211_connection_loss);
1764
1765
66e67e41
JB		 1766static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1767 bool assoc)
1768{
1769 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1770
1771 lockdep_assert_held(&sdata->u.mgd.mtx);
1772
1773 if (auth_data->synced)
1774 drv_finish_tx_sync(sdata->local, sdata,
1775 auth_data->bss->bssid,
1776 IEEE80211_TX_SYNC_AUTH);
1777
1778 if (!assoc) {
1779 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1780
1781 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1782 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1783 }
1784
1785 cfg80211_put_bss(auth_data->bss);
1786 kfree(auth_data);
1787 sdata->u.mgd.auth_data = NULL;
1788}
1789
1790static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1791 struct ieee80211_mgmt *mgmt, size_t len)
1792{
1793 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1794 u8 *pos;
1795 struct ieee802_11_elems elems;
1796
1797 pos = mgmt->u.auth.variable;
1798 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1799 if (!elems.challenge)
1800 return;
1801 auth_data->expected_transaction = 4;
1802 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1803 elems.challenge - 2, elems.challenge_len + 2,
1804 auth_data->bss->bssid, auth_data->bss->bssid,
1805 auth_data->key, auth_data->key_len,
1806 auth_data->key_idx);
1807}
1808
1809static enum rx_mgmt_action __must_check
1810ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1811 struct ieee80211_mgmt *mgmt, size_t len)
1812{
1813 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1814 u8 bssid[ETH_ALEN];
1815 u16 auth_alg, auth_transaction, status_code;
1816 struct sta_info *sta;
1817
1818 lockdep_assert_held(&ifmgd->mtx);
1819
1820 if (len < 24 + 6)
1821 return RX_MGMT_NONE;
1822
1823 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1824 return RX_MGMT_NONE;
1825
1826 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1827
888d04df 1828 if (compare_ether_addr(bssid, mgmt->bssid))
66e67e41
JB		 1829 return RX_MGMT_NONE;
1830
1831 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1832 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1833 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1834
1835 if (auth_alg != ifmgd->auth_data->algorithm ||
1836 auth_transaction != ifmgd->auth_data->expected_transaction)
1837 return RX_MGMT_NONE;
1838
1839 if (status_code != WLAN_STATUS_SUCCESS) {
1840 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1841 sdata->name, mgmt->sa, status_code);
1842 goto out;
1843 }
1844
1845 switch (ifmgd->auth_data->algorithm) {
1846 case WLAN_AUTH_OPEN:
1847 case WLAN_AUTH_LEAP:
1848 case WLAN_AUTH_FT:
1849 break;
1850 case WLAN_AUTH_SHARED_KEY:
1851 if (ifmgd->auth_data->expected_transaction != 4) {
1852 ieee80211_auth_challenge(sdata, mgmt, len);
1853 /* need another frame */
1854 return RX_MGMT_NONE;
1855 }
1856 break;
1857 default:
1858 WARN_ONCE(1, "invalid auth alg %d",
1859 ifmgd->auth_data->algorithm);
1860 return RX_MGMT_NONE;
1861 }
1862
1863 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1864 out:
1865 if (ifmgd->auth_data->synced)
1866 drv_finish_tx_sync(sdata->local, sdata, bssid,
1867 IEEE80211_TX_SYNC_AUTH);
1868 ifmgd->auth_data->synced = false;
1869 ifmgd->auth_data->done = true;
1870 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1871 run_again(ifmgd, ifmgd->auth_data->timeout);
1872
1873 /* move station state to auth */
1874 mutex_lock(&sdata->local->sta_mtx);
1875 sta = sta_info_get(sdata, bssid);
1876 if (!sta) {
1877 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1878 goto out_err;
1879 }
1880 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1881 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1882 sdata->name, bssid);
1883 goto out_err;
1884 }
1885 mutex_unlock(&sdata->local->sta_mtx);
1886
1887 return RX_MGMT_CFG80211_RX_AUTH;
1888 out_err:
1889 mutex_unlock(&sdata->local->sta_mtx);
1890 /* ignore frame -- wait for timeout */
1891 return RX_MGMT_NONE;
1892}
1893
1894
77fdaa12
JB		 1895static enum rx_mgmt_action __must_check
1896ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1897 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1898{
46900298 1899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1900 const u8 *bssid = NULL;
f0706e82
JB		 1901 u16 reason_code;
1902
66e67e41
JB		 1903 lockdep_assert_held(&ifmgd->mtx);
1904
f4ea83dd 1905 if (len < 24 + 2)
77fdaa12 1906 return RX_MGMT_NONE;
f0706e82 1907
66e67e41 1908 if (!ifmgd->associated ||
888d04df 1909 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1910 return RX_MGMT_NONE;
77fdaa12 1911
0c1ad2ca 1912 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1913
1914 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1915
77fdaa12 1916 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1917 sdata->name, bssid, reason_code);
77fdaa12 1918
37ad3888
JB		 1919 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1920
7da7cc1d 1921 mutex_lock(&sdata->local->mtx);
63f170e0 1922 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1923 mutex_unlock(&sdata->local->mtx);
f0706e82 1924
77fdaa12 1925 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1926}
1927
1928
77fdaa12
JB		 1929static enum rx_mgmt_action __must_check
1930ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1931 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1932{
46900298 1933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1934 u16 reason_code;
1935
66e67e41 1936 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1937
66e67e41 1938 if (len < 24 + 2)
77fdaa12
JB		 1939 return RX_MGMT_NONE;
1940
66e67e41 1941 if (!ifmgd->associated ||
888d04df 1942 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1943 return RX_MGMT_NONE;
f0706e82
JB		 1944
1945 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1946
0ff71613 1947 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1948 sdata->name, mgmt->sa, reason_code);
f0706e82 1949
37ad3888
JB		 1950 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1951
7da7cc1d 1952 mutex_lock(&sdata->local->mtx);
bc83b681 1953 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1954 mutex_unlock(&sdata->local->mtx);
37ad3888 1955
77fdaa12 1956 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1957}
1958
c74d084f
CL		 1959static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1960 u8 *supp_rates, unsigned int supp_rates_len,
1961 u32 *rates, u32 *basic_rates,
1962 bool *have_higher_than_11mbit,
1963 int *min_rate, int *min_rate_index)
1964{
1965 int i, j;
1966
1967 for (i = 0; i < supp_rates_len; i++) {
1968 int rate = (supp_rates[i] & 0x7f) * 5;
1969 bool is_basic = !!(supp_rates[i] & 0x80);
1970
1971 if (rate > 110)
1972 *have_higher_than_11mbit = true;
1973
1974 /*
1975 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1976 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1977 *
1978 * Note: Even through the membership selector and the basic
1979 * rate flag share the same bit, they are not exactly
1980 * the same.
1981 */
1982 if (!!(supp_rates[i] & 0x80) &&
1983 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1984 continue;
1985
1986 for (j = 0; j < sband->n_bitrates; j++) {
1987 if (sband->bitrates[j].bitrate == rate) {
1988 *rates |= BIT(j);
1989 if (is_basic)
1990 *basic_rates |= BIT(j);
1991 if (rate < *min_rate) {
1992 *min_rate = rate;
1993 *min_rate_index = j;
1994 }
1995 break;
1996 }
1997 }
1998 }
1999}
f0706e82 2000
66e67e41
JB		 2001static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2002 bool assoc)
2003{
2004 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2005
2006 lockdep_assert_held(&sdata->u.mgd.mtx);
2007
2008 if (assoc_data->synced)
2009 drv_finish_tx_sync(sdata->local, sdata,
2010 assoc_data->bss->bssid,
2011 IEEE80211_TX_SYNC_ASSOC);
2012
2013 if (!assoc) {
2014 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2015
2016 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2017 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2018 }
2019
2020 kfree(assoc_data);
2021 sdata->u.mgd.assoc_data = NULL;
2022}
2023
2024static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2025 struct cfg80211_bss *cbss,
af6b6374 2026 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2027{
46900298 2028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2029 struct ieee80211_local *local = sdata->local;
8318d78a 2030 struct ieee80211_supported_band *sband;
f0706e82 2031 struct sta_info *sta;
af6b6374 2032 u8 *pos;
881d948c 2033 u32 rates, basic_rates;
af6b6374 2034 u16 capab_info, aid;
f0706e82 2035 struct ieee802_11_elems elems;
bda3933a 2036 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2037 u32 changed = 0;
c74d084f 2038 int err;
5d1ec85f 2039 bool have_higher_than_11mbit = false;
ae5eb026 2040 u16 ap_ht_cap_flags;
3432f923 2041 int min_rate = INT_MAX, min_rate_index = -1;
f0706e82 2042
af6b6374 2043 /* AssocResp and ReassocResp have identical structure */
f0706e82 2044
f0706e82 2045 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2046 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2047
1dd84aa2 2048 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 2049 printk(KERN_DEBUG
2050 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2051 sdata->name, aid);
1dd84aa2
JB		 2052 aid &= ~(BIT(15) | BIT(14));
2053
05cb9108
JB		 2054 ifmgd->broken_ap = false;
2055
2056 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2057 printk(KERN_DEBUG
2058 "%s: invalid AID value %d (out of range), turn off PS\n",
2059 sdata->name, aid);
2060 aid = 0;
2061 ifmgd->broken_ap = true;
2062 }
2063
af6b6374
JB		 2064 pos = mgmt->u.assoc_resp.variable;
2065 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2066
f0706e82
JB		 2067 if (!elems.supp_rates) {
2068 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 2069 sdata->name);
af6b6374 2070 return false;
f0706e82
JB		 2071 }
2072
46900298 2073 ifmgd->aid = aid;
f0706e82 2074
2a33bee2
GE		 2075 mutex_lock(&sdata->local->sta_mtx);
2076 /*
2077 * station info was already allocated and inserted before
2078 * the association and should be available to us
2079 */
7852e361 2080 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2081 if (WARN_ON(!sta)) {
2082 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2083 return false;
77fdaa12 2084 }
05e5e883 2085
60f8b39c
JB		 2086 rates = 0;
2087 basic_rates = 0;
66e67e41 2088 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2089
c74d084f
CL		 2090 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
2091 &rates, &basic_rates, &have_higher_than_11mbit,
2092 &min_rate, &min_rate_index);
f0706e82 2093
c74d084f
CL		 2094 ieee80211_get_rates(sband, elems.ext_supp_rates,
2095 elems.ext_supp_rates_len, &rates, &basic_rates,
2096 &have_higher_than_11mbit,
2097 &min_rate, &min_rate_index);
f0706e82 2098
3432f923
EP		 2099 /*
2100 * some buggy APs don't advertise basic_rates. use the lowest
2101 * supported rate instead.
2102 */
2103 if (unlikely(!basic_rates) && min_rate_index >= 0) {
2104 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
2105 "Using min supported rate instead.\n", sdata->name);
2106 basic_rates = BIT(min_rate_index);
2107 }
2108
66e67e41 2109 sta->sta.supp_rates[local->oper_channel->band] = rates;
bda3933a 2110 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 2111
2112 /* cf. IEEE 802.11 9.2.12 */
66e67e41 2113 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 2114 have_higher_than_11mbit)
2115 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2116 else
2117 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2118
ab1faead 2119 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2120 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2121 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 2122
2123 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 2124
4b7679a5 2125 rate_control_rate_init(sta);
f0706e82 2126
46900298 2127 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2128 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2129
ddf4ac53 2130 if (elems.wmm_param)
c2c98fde 2131 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2132
c8987876
JB		 2133 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2134 if (!err)
2135 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2136 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2137 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2138 if (err) {
2139 printk(KERN_DEBUG
2140 "%s: failed to move station %pM to desired state\n",
2141 sdata->name, sta->sta.addr);
2142 WARN_ON(__sta_info_destroy(sta));
2143 mutex_unlock(&sdata->local->sta_mtx);
2144 return false;
2145 }
2146
7852e361 2147 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2148
f2176d72
JO		 2149 /*
2150 * Always handle WMM once after association regardless
2151 * of the first value the AP uses. Setting -1 here has
2152 * that effect because the AP values is an unsigned
2153 * 4-bit value.
2154 */
2155 ifmgd->wmm_last_param_set = -1;
2156
ddf4ac53 2157 if (elems.wmm_param)
4ced3f74 2158 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2159 elems.wmm_param_len);
aa837e1d 2160 else
3abead59
JB		 2161 ieee80211_set_wmm_default(sdata, false);
2162 changed |= BSS_CHANGED_QOS;
f0706e82 2163
ae5eb026 2164 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 2165 (sdata->local->hw.queues >= 4) &&
ab1faead 2166 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 2167 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 2168 cbss->bssid, ap_ht_cap_flags,
2169 false);
ae5eb026 2170
60f8b39c
JB		 2171 /* set AID and assoc capability,
2172 * ieee80211_set_associated() will tell the driver */
2173 bss_conf->aid = aid;
2174 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2175 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2176
d524215f
FF		 2177 /*
2178 * If we're using 4-addr mode, let the AP know that we're
2179 * doing so, so that it can create the STA VLAN on its side
2180 */
2181 if (ifmgd->use_4addr)
2182 ieee80211_send_4addr_nullfunc(local, sdata);
2183
15b7b062 2184 /*
b291ba11
JB		 2185 * Start timer to probe the connection to the AP now.
2186 * Also start the timer that will detect beacon loss.
15b7b062 2187 */
b291ba11 2188 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2189 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2190
af6b6374 2191 return true;
f0706e82
JB		 2192}
2193
66e67e41
JB		 2194static enum rx_mgmt_action __must_check
2195ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2196 struct ieee80211_mgmt *mgmt, size_t len,
2197 struct cfg80211_bss **bss)
2198{
2199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2200 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2201 u16 capab_info, status_code, aid;
2202 struct ieee802_11_elems elems;
2203 u8 *pos;
2204 bool reassoc;
2205
2206 lockdep_assert_held(&ifmgd->mtx);
2207
2208 if (!assoc_data)
2209 return RX_MGMT_NONE;
888d04df 2210 if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2211 return RX_MGMT_NONE;
2212
2213 /*
2214 * AssocResp and ReassocResp have identical structure, so process both
2215 * of them in this function.
2216 */
2217
2218 if (len < 24 + 6)
2219 return RX_MGMT_NONE;
2220
2221 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2222 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2223 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2224 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2225
2226 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2227 "status=%d aid=%d)\n",
2228 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2229 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2230
2231 pos = mgmt->u.assoc_resp.variable;
2232 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2233
2234 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2235 elems.timeout_int && elems.timeout_int_len == 5 &&
2236 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2237 u32 tu, ms;
2238 tu = get_unaligned_le32(elems.timeout_int + 1);
2239 ms = tu * 1024 / 1000;
2240 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2241 "comeback duration %u TU (%u ms)\n",
2242 sdata->name, mgmt->sa, tu, ms);
2243 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2244 if (ms > IEEE80211_ASSOC_TIMEOUT)
2245 run_again(ifmgd, assoc_data->timeout);
2246 return RX_MGMT_NONE;
2247 }
2248
2249 *bss = assoc_data->bss;
2250
2251 if (status_code != WLAN_STATUS_SUCCESS) {
2252 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2253 sdata->name, mgmt->sa, status_code);
2254 ieee80211_destroy_assoc_data(sdata, false);
2255 } else {
2256 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2257
79ebfb85
JB		 2258 /* tell driver about sync done first */
2259 if (assoc_data->synced) {
2260 drv_finish_tx_sync(sdata->local, sdata,
2261 assoc_data->bss->bssid,
2262 IEEE80211_TX_SYNC_ASSOC);
2263 assoc_data->synced = false;
2264 }
f0706e82 2265
66e67e41
JB		 2266 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2267 /* oops -- internal error -- send timeout for now */
79ebfb85 2268 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2269 sta_info_destroy_addr(sdata, mgmt->bssid);
2270 cfg80211_put_bss(*bss);
2271 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2272 }
79ebfb85
JB		 2273
2274 /*
2275 * destroy assoc_data afterwards, as otherwise an idle
2276 * recalc after assoc_data is NULL but before associated
2277 * is set can cause the interface to go idle
2278 */
2279 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2280 }
2281
2282 return RX_MGMT_CFG80211_RX_ASSOC;
2283}
98c8fccf
JB		 2284static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2285 struct ieee80211_mgmt *mgmt,
2286 size_t len,
2287 struct ieee80211_rx_status *rx_status,
2288 struct ieee802_11_elems *elems,
2289 bool beacon)
2290{
2291 struct ieee80211_local *local = sdata->local;
2292 int freq;
c2b13452 2293 struct ieee80211_bss *bss;
98c8fccf 2294 struct ieee80211_channel *channel;
56007a02
JB		 2295 bool need_ps = false;
2296
66e67e41 2297 if (sdata->u.mgd.associated &&
888d04df
FF		 2298 compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
2299 == 0) {
56007a02
JB		 2300 bss = (void *)sdata->u.mgd.associated->priv;
2301 /* not previously set so we may need to recalc */
2302 need_ps = !bss->dtim_period;
2303 }
98c8fccf
JB		 2304
2305 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2306 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2307 rx_status->band);
98c8fccf
JB		 2308 else
2309 freq = rx_status->freq;
2310
2311 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2312
2313 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2314 return;
2315
98c8fccf 2316 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2317 channel, beacon);
77fdaa12
JB		 2318 if (bss)
2319 ieee80211_rx_bss_put(local, bss);
2320
2321 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2322 return;
2323
56007a02
JB		 2324 if (need_ps) {
2325 mutex_lock(&local->iflist_mtx);
2326 ieee80211_recalc_ps(local, -1);
2327 mutex_unlock(&local->iflist_mtx);
2328 }
2329
c481ec97 2330 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2331 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2332 ETH_ALEN) == 0)) {
c481ec97
S		 2333 struct ieee80211_channel_sw_ie *sw_elem =
2334 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2335 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2336 bss, rx_status->mactime);
c481ec97 2337 }
f0706e82
JB		 2338}
2339
2340
f698d856 2341static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2342 struct sk_buff *skb)
f0706e82 2343{
af6b6374 2344 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2345 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2346 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2347 size_t baselen, len = skb->len;
ae6a44e3
EK		 2348 struct ieee802_11_elems elems;
2349
15b7b062
KV		 2350 ifmgd = &sdata->u.mgd;
2351
77fdaa12
JB		 2352 ASSERT_MGD_MTX(ifmgd);
2353
888d04df 2354 if (compare_ether_addr(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2355 return; /* ignore ProbeResp to foreign address */
2356
ae6a44e3
EK		 2357 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2358 if (baselen > len)
2359 return;
2360
2361 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2362 &elems);
2363
98c8fccf 2364 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2365
77fdaa12 2366 if (ifmgd->associated &&
888d04df 2367 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
4e5ff376 2368 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2369
2370 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
888d04df
FF		 2371 compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
2372 == 0) {
66e67e41
JB		 2373 /* got probe response, continue with auth */
2374 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2375 ifmgd->auth_data->tries = 0;
2376 ifmgd->auth_data->timeout = jiffies;
2377 run_again(ifmgd, ifmgd->auth_data->timeout);
2378 }
f0706e82
JB		 2379}
2380
d91f36db
JB		 2381/*
2382 * This is the canonical list of information elements we care about,
2383 * the filter code also gives us all changes to the Microsoft OUI
2384 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2385 *
2386 * We implement beacon filtering in software since that means we can
2387 * avoid processing the frame here and in cfg80211, and userspace
2388 * will not be able to tell whether the hardware supports it or not.
2389 *
2390 * XXX: This list needs to be dynamic -- userspace needs to be able to
2391 * add items it requires. It also needs to be able to tell us to
2392 * look out for other vendor IEs.
2393 */
2394static const u64 care_about_ies =
1d4df3a5
JB		 2395 (1ULL << WLAN_EID_COUNTRY) |
2396 (1ULL << WLAN_EID_ERP_INFO) |
2397 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2398 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2399 (1ULL << WLAN_EID_HT_CAPABILITY) |
2400 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 2401
f698d856 2402static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2403 struct ieee80211_mgmt *mgmt,
2404 size_t len,
2405 struct ieee80211_rx_status *rx_status)
2406{
d91f36db 2407 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2408 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2409 size_t baselen;
2410 struct ieee802_11_elems elems;
f698d856 2411 struct ieee80211_local *local = sdata->local;
471b3efd 2412 u32 changed = 0;
d91f36db 2413 bool erp_valid, directed_tim = false;
7a5158ef 2414 u8 erp_value = 0;
d91f36db 2415 u32 ncrc;
77fdaa12
JB		 2416 u8 *bssid;
2417
66e67e41 2418 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2419
ae6a44e3
EK		 2420 /* Process beacon from the current BSS */
2421 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2422 if (baselen > len)
2423 return;
2424
d91f36db 2425 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2426 return;
f0706e82 2427
66e67e41 2428 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
888d04df
FF		 2429 compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
2430 == 0) {
66e67e41
JB		 2431 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2432 len - baselen, &elems);
77fdaa12 2433
66e67e41
JB		 2434 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2435 false);
2436 ifmgd->assoc_data->have_beacon = true;
2437 ifmgd->assoc_data->sent_assoc = false;
2438 /* continue assoc process */
2439 ifmgd->assoc_data->timeout = jiffies;
2440 run_again(ifmgd, ifmgd->assoc_data->timeout);
2441 return;
2442 }
77fdaa12 2443
66e67e41 2444 if (!ifmgd->associated ||
888d04df 2445 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2446 return;
66e67e41 2447 bssid = ifmgd->associated->bssid;
f0706e82 2448
17e4ec14
JM		 2449 /* Track average RSSI from the Beacon frames of the current AP */
2450 ifmgd->last_beacon_signal = rx_status->signal;
2451 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2452 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2453 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2454 ifmgd->last_cqm_event_signal = 0;
391a200a 2455 ifmgd->count_beacon_signal = 1;
615f7b9b 2456 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2457 } else {
2458 ifmgd->ave_beacon_signal =
2459 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2460 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2461 ifmgd->ave_beacon_signal) / 16;
391a200a 2462 ifmgd->count_beacon_signal++;
17e4ec14 2463 }
615f7b9b
MV		 2464
2465 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2466 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2467 int sig = ifmgd->ave_beacon_signal;
2468 int last_sig = ifmgd->last_ave_beacon_signal;
2469
2470 /*
2471 * if signal crosses either of the boundaries, invoke callback
2472 * with appropriate parameters
2473 */
2474 if (sig > ifmgd->rssi_max_thold &&
2475 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2476 ifmgd->last_ave_beacon_signal = sig;
2477 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2478 } else if (sig < ifmgd->rssi_min_thold &&
2479 (last_sig >= ifmgd->rssi_max_thold ||
2480 last_sig == 0)) {
2481 ifmgd->last_ave_beacon_signal = sig;
2482 drv_rssi_callback(local, RSSI_EVENT_LOW);
2483 }
2484 }
2485
17e4ec14 2486 if (bss_conf->cqm_rssi_thold &&
391a200a 2487 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2488 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2489 int sig = ifmgd->ave_beacon_signal / 16;
2490 int last_event = ifmgd->last_cqm_event_signal;
2491 int thold = bss_conf->cqm_rssi_thold;
2492 int hyst = bss_conf->cqm_rssi_hyst;
2493 if (sig < thold &&
2494 (last_event == 0 || sig < last_event - hyst)) {
2495 ifmgd->last_cqm_event_signal = sig;
2496 ieee80211_cqm_rssi_notify(
2497 &sdata->vif,
2498 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2499 GFP_KERNEL);
2500 } else if (sig > thold &&
2501 (last_event == 0 || sig > last_event + hyst)) {
2502 ifmgd->last_cqm_event_signal = sig;
2503 ieee80211_cqm_rssi_notify(
2504 &sdata->vif,
2505 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2506 GFP_KERNEL);
2507 }
2508 }
2509
b291ba11 2510 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 2511#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2512 if (net_ratelimit()) {
2513 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 2514 "to a received beacon\n", sdata->name);
92778180
JM		 2515 }
2516#endif
b291ba11 2517 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2518 mutex_lock(&local->iflist_mtx);
2519 ieee80211_recalc_ps(local, -1);
2520 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2521 }
2522
b291ba11
JB		 2523 /*
2524 * Push the beacon loss detection into the future since
2525 * we are processing a beacon from the AP just now.
2526 */
d3a910a8 2527 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2528
d91f36db
JB		 2529 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2530 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2531 len - baselen, &elems,
2532 care_about_ies, ncrc);
2533
2534 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2535 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2536 ifmgd->aid);
d91f36db 2537
d8ec4433 2538 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2539 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2540 true);
d91f36db 2541
4ced3f74 2542 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2543 elems.wmm_param_len);
2544 }
fe3fa827 2545
25c9c875 2546 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2547 if (directed_tim) {
572e0012
KV		 2548 if (local->hw.conf.dynamic_ps_timeout > 0) {
2549 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2550 ieee80211_hw_config(local,
2551 IEEE80211_CONF_CHANGE_PS);
2552 ieee80211_send_nullfunc(local, sdata, 0);
2553 } else {
2554 local->pspolling = true;
2555
2556 /*
2557 * Here is assumed that the driver will be
2558 * able to send ps-poll frame and receive a
2559 * response even though power save mode is
2560 * enabled, but some drivers might require
2561 * to disable power save here. This needs
2562 * to be investigated.
2563 */
2564 ieee80211_send_pspoll(local, sdata);
2565 }
a97b77b9
VN		 2566 }
2567 }
7a5158ef 2568
d8ec4433 2569 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2570 return;
2571 ifmgd->beacon_crc = ncrc;
d8ec4433 2572 ifmgd->beacon_crc_valid = true;
30196673 2573
7a5158ef
JB		 2574 if (elems.erp_info && elems.erp_info_len >= 1) {
2575 erp_valid = true;
2576 erp_value = elems.erp_info[0];
2577 } else {
2578 erp_valid = false;
50c4afb9 2579 }
7a5158ef
JB		 2580 changed |= ieee80211_handle_bss_capability(sdata,
2581 le16_to_cpu(mgmt->u.beacon.capab_info),
2582 erp_valid, erp_value);
f0706e82 2583
d3c990fb 2584
53d6f81c 2585 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 2586 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 2587 struct sta_info *sta;
2588 struct ieee80211_supported_band *sband;
2589 u16 ap_ht_cap_flags;
2590
2591 rcu_read_lock();
2592
abe60632 2593 sta = sta_info_get(sdata, bssid);
77fdaa12 2594 if (WARN_ON(!sta)) {
ae5eb026
JB		 2595 rcu_read_unlock();
2596 return;
2597 }
2598
2599 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2600
ef96a842 2601 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
ae5eb026
JB		 2602 elems.ht_cap_elem, &sta->sta.ht_cap);
2603
2604 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2605
2606 rcu_read_unlock();
2607
2608 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 2609 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 2610 }
2611
8b19e6ca 2612 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2613 if (elems.country_elem) {
a8302de9
VT		 2614 /* TODO: IBSS also needs this */
2615 if (elems.pwr_constr_elem)
2616 ieee80211_handle_pwr_constr(sdata,
2617 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2618 elems.pwr_constr_elem,
2619 elems.pwr_constr_elem_len);
3f2355cb
LR		 2620 }
2621
471b3efd 2622 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2623}
2624
1fa57d01
JB		 2625void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2626 struct sk_buff *skb)
f0706e82 2627{
77fdaa12 2628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2629 struct ieee80211_rx_status *rx_status;
f0706e82 2630 struct ieee80211_mgmt *mgmt;
66e67e41 2631 struct cfg80211_bss *bss = NULL;
77fdaa12 2632 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2633 u16 fc;
2634
f0706e82
JB		 2635 rx_status = (struct ieee80211_rx_status *) skb->cb;
2636 mgmt = (struct ieee80211_mgmt *) skb->data;
2637 fc = le16_to_cpu(mgmt->frame_control);
2638
77fdaa12
JB		 2639 mutex_lock(&ifmgd->mtx);
2640
66e67e41
JB		 2641 switch (fc & IEEE80211_FCTL_STYPE) {
2642 case IEEE80211_STYPE_BEACON:
2643 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2644 break;
2645 case IEEE80211_STYPE_PROBE_RESP:
2646 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2647 break;
2648 case IEEE80211_STYPE_AUTH:
2649 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2650 break;
2651 case IEEE80211_STYPE_DEAUTH:
2652 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2653 break;
2654 case IEEE80211_STYPE_DISASSOC:
2655 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2656 break;
2657 case IEEE80211_STYPE_ASSOC_RESP:
2658 case IEEE80211_STYPE_REASSOC_RESP:
2659 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2660 break;
2661 case IEEE80211_STYPE_ACTION:
2662 switch (mgmt->u.action.category) {
2663 case WLAN_CATEGORY_SPECTRUM_MGMT:
2664 ieee80211_sta_process_chanswitch(sdata,
2665 &mgmt->u.action.u.chan_switch.sw_elem,
2666 (void *)ifmgd->associated->priv,
2667 rx_status->mactime);
77fdaa12 2668 break;
77fdaa12 2669 }
77fdaa12 2670 }
77fdaa12
JB		 2671 mutex_unlock(&ifmgd->mtx);
2672
66e67e41
JB		 2673 switch (rma) {
2674 case RX_MGMT_NONE:
2675 /* no action */
2676 break;
2677 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2678 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2679 break;
2680 case RX_MGMT_CFG80211_DISASSOC:
2681 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2682 break;
2683 case RX_MGMT_CFG80211_RX_AUTH:
2684 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2685 break;
2686 case RX_MGMT_CFG80211_RX_ASSOC:
2687 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2688 break;
2689 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2690 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2691 break;
2692 default:
2693 WARN(1, "unexpected: %d", rma);
b054b747 2694 }
f0706e82
JB		 2695}
2696
9c6bd790 2697static void ieee80211_sta_timer(unsigned long data)
f0706e82 2698{
60f8b39c
JB		 2699 struct ieee80211_sub_if_data *sdata =
2700 (struct ieee80211_sub_if_data *) data;
46900298 2701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2702 struct ieee80211_local *local = sdata->local;
f0706e82 2703
5bb644a0
JB		 2704 if (local->quiescing) {
2705 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2706 return;
2707 }
2708
64592c8f 2709 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2710}
2711
04ac3c0e 2712static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2713 u8 *bssid, u8 reason)
04ac3c0e
FF		 2714{
2715 struct ieee80211_local *local = sdata->local;
2716 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2717 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2718
2719 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2720 IEEE80211_STA_BEACON_POLL);
2721
37ad3888
JB		 2722 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2723 false, frame_buf);
04ac3c0e 2724 mutex_unlock(&ifmgd->mtx);
37ad3888 2725
04ac3c0e
FF		 2726 /*
2727 * must be outside lock due to cfg80211,
2728 * but that's not a problem.
2729 */
5fef7dbc 2730 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2731
2732 mutex_lock(&local->mtx);
2733 ieee80211_recalc_idle(local);
2734 mutex_unlock(&local->mtx);
2735
04ac3c0e
FF		 2736 mutex_lock(&ifmgd->mtx);
2737}
2738
66e67e41
JB		 2739static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2740{
2741 struct ieee80211_local *local = sdata->local;
2742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2743 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2744
2745 lockdep_assert_held(&ifmgd->mtx);
2746
2747 if (WARN_ON_ONCE(!auth_data))
2748 return -EINVAL;
2749
2750 if (!auth_data->synced) {
2751 int ret = drv_tx_sync(local, sdata, auth_data->bss->bssid,
2752 IEEE80211_TX_SYNC_AUTH);
2753 if (ret)
2754 return ret;
2755 }
2756 auth_data->synced = true;
2757
2758 auth_data->tries++;
2759
2760 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2761 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2762 sdata->name, auth_data->bss->bssid);
2763
2764 /*
2765 * Most likely AP is not in the range so remove the
2766 * bss struct for that AP.
2767 */
2768 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2769
2770 return -ETIMEDOUT;
2771 }
2772
2773 if (auth_data->bss->proberesp_ies) {
2774 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2775 sdata->name, auth_data->bss->bssid, auth_data->tries,
2776 IEEE80211_AUTH_MAX_TRIES);
2777
2778 auth_data->expected_transaction = 2;
2779 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2780 auth_data->ie, auth_data->ie_len,
2781 auth_data->bss->bssid,
2782 auth_data->bss->bssid, NULL, 0, 0);
2783 } else {
2784 const u8 *ssidie;
2785
2786 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2787 sdata->name, auth_data->bss->bssid, auth_data->tries,
2788 IEEE80211_AUTH_MAX_TRIES);
2789
2790 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2791 if (!ssidie)
2792 return -EINVAL;
2793 /*
2794 * Direct probe is sent to broadcast address as some APs
2795 * will not answer to direct packet in unassociated state.
2796 */
2797 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2798 NULL, 0, (u32) -1, true, false);
2799 }
2800
2801 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2802 run_again(ifmgd, auth_data->timeout);
2803
2804 return 0;
2805}
2806
2807static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2808{
2809 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2810 struct ieee80211_local *local = sdata->local;
2811
2812 lockdep_assert_held(&sdata->u.mgd.mtx);
2813
2814 if (!assoc_data->synced) {
2815 int ret = drv_tx_sync(local, sdata, assoc_data->bss->bssid,
2816 IEEE80211_TX_SYNC_ASSOC);
2817 if (ret)
2818 return ret;
2819 }
2820 assoc_data->synced = true;
2821
2822 assoc_data->tries++;
2823 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2824 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2825 sdata->name, assoc_data->bss->bssid);
2826
2827 /*
2828 * Most likely AP is not in the range so remove the
2829 * bss struct for that AP.
2830 */
2831 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2832
2833 return -ETIMEDOUT;
2834 }
2835
2836 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2837 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2838 IEEE80211_ASSOC_MAX_TRIES);
2839 ieee80211_send_assoc(sdata);
2840
2841 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2842 run_again(&sdata->u.mgd, assoc_data->timeout);
2843
2844 return 0;
2845}
2846
1fa57d01 2847void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2848{
9c6bd790 2849 struct ieee80211_local *local = sdata->local;
1fa57d01 2850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2851
77fdaa12
JB		 2852 mutex_lock(&ifmgd->mtx);
2853
66e67e41
JB		 2854 if (ifmgd->auth_data &&
2855 time_after(jiffies, ifmgd->auth_data->timeout)) {
2856 if (ifmgd->auth_data->done) {
2857 /*
2858 * ok ... we waited for assoc but userspace didn't,
2859 * so let's just kill the auth data
2860 */
2861 ieee80211_destroy_auth_data(sdata, false);
2862 } else if (ieee80211_probe_auth(sdata)) {
2863 u8 bssid[ETH_ALEN];
2864
2865 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2866
2867 ieee80211_destroy_auth_data(sdata, false);
2868
2869 mutex_unlock(&ifmgd->mtx);
2870 cfg80211_send_auth_timeout(sdata->dev, bssid);
2871 mutex_lock(&ifmgd->mtx);
2872 }
2873 } else if (ifmgd->auth_data)
2874 run_again(ifmgd, ifmgd->auth_data->timeout);
2875
2876 if (ifmgd->assoc_data &&
2877 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2878 if (!ifmgd->assoc_data->have_beacon ||
2879 ieee80211_do_assoc(sdata)) {
2880 u8 bssid[ETH_ALEN];
2881
2882 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2883
2884 ieee80211_destroy_assoc_data(sdata, false);
2885
2886 mutex_unlock(&ifmgd->mtx);
2887 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2888 mutex_lock(&ifmgd->mtx);
2889 }
2890 } else if (ifmgd->assoc_data)
2891 run_again(ifmgd, ifmgd->assoc_data->timeout);
2892
b291ba11
JB		 2893 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2894 IEEE80211_STA_CONNECTION_POLL) &&
2895 ifmgd->associated) {
a43abf29 2896 u8 bssid[ETH_ALEN];
72a8a3ed 2897 int max_tries;
a43abf29 2898
0c1ad2ca 2899 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2900
72a8a3ed 2901 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2902 max_tries = max_nullfunc_tries;
72a8a3ed 2903 else
180205bd 2904 max_tries = max_probe_tries;
72a8a3ed 2905
4e5ff376
FF		 2906 /* ACK received for nullfunc probing frame */
2907 if (!ifmgd->probe_send_count)
2908 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2909 else if (ifmgd->nullfunc_failed) {
2910 if (ifmgd->probe_send_count < max_tries) {
2911#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2912 wiphy_debug(local->hw.wiphy,
2913 "%s: No ack for nullfunc frame to"
bfc31df3 2914 " AP %pM, try %d/%i\n",
04ac3c0e 2915 sdata->name, bssid,
bfc31df3 2916 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2917#endif
2918 ieee80211_mgd_probe_ap_send(sdata);
2919 } else {
2920#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2921 wiphy_debug(local->hw.wiphy,
2922 "%s: No ack for nullfunc frame to"
2923 " AP %pM, disconnecting.\n",
c658e5db 2924 sdata->name, bssid);
04ac3c0e 2925#endif
95acac61
JB		 2926 ieee80211_sta_connection_lost(sdata, bssid,
2927 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2928 }
2929 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2930 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2931 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2932#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2933 wiphy_debug(local->hw.wiphy,
2934 "%s: Failed to send nullfunc to AP %pM"
2935 " after %dms, disconnecting.\n",
2936 sdata->name,
180205bd 2937 bssid, probe_wait_ms);
04ac3c0e 2938#endif
95acac61
JB		 2939 ieee80211_sta_connection_lost(sdata, bssid,
2940 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2941 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2942#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2943 wiphy_debug(local->hw.wiphy,
2944 "%s: No probe response from AP %pM"
bfc31df3 2945 " after %dms, try %d/%i\n",
b38afa87 2946 sdata->name,
180205bd 2947 bssid, probe_wait_ms,
bfc31df3 2948 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2949#endif
2950 ieee80211_mgd_probe_ap_send(sdata);
2951 } else {
b291ba11
JB		 2952 /*
2953 * We actually lost the connection ... or did we?
2954 * Let's make sure!
2955 */
b38afa87
BG		 2956 wiphy_debug(local->hw.wiphy,
2957 "%s: No probe response from AP %pM"
2958 " after %dms, disconnecting.\n",
2959 sdata->name,
180205bd 2960 bssid, probe_wait_ms);
04ac3c0e 2961
95acac61
JB		 2962 ieee80211_sta_connection_lost(sdata, bssid,
2963 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2964 }
2965 }
2966
77fdaa12 2967 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2968
2969 mutex_lock(&local->mtx);
2970 ieee80211_recalc_idle(local);
2971 mutex_unlock(&local->mtx);
f0706e82
JB		 2972}
2973
b291ba11
JB		 2974static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2975{
2976 struct ieee80211_sub_if_data *sdata =
2977 (struct ieee80211_sub_if_data *) data;
2978 struct ieee80211_local *local = sdata->local;
2979
2980 if (local->quiescing)
2981 return;
2982
1e4dcd01
JO		 2983 ieee80211_queue_work(&sdata->local->hw,
2984 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2985}
2986
2987static void ieee80211_sta_conn_mon_timer(unsigned long data)
2988{
2989 struct ieee80211_sub_if_data *sdata =
2990 (struct ieee80211_sub_if_data *) data;
2991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2992 struct ieee80211_local *local = sdata->local;
2993
2994 if (local->quiescing)
2995 return;
2996
42935eca 2997 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2998}
2999
3000static void ieee80211_sta_monitor_work(struct work_struct *work)
3001{
3002 struct ieee80211_sub_if_data *sdata =
3003 container_of(work, struct ieee80211_sub_if_data,
3004 u.mgd.monitor_work);
3005
3006 ieee80211_mgd_probe_ap(sdata, false);
3007}
3008
9c6bd790
JB		 3009static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3010{
494f1fe5
EP		 3011 u32 flags;
3012
ad935687 3013 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 3014 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
3015 IEEE80211_STA_CONNECTION_POLL);
ad935687 3016
b291ba11 3017 /* let's probe the connection once */
494f1fe5
EP		 3018 flags = sdata->local->hw.flags;
3019 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3020 ieee80211_queue_work(&sdata->local->hw,
3021 &sdata->u.mgd.monitor_work);
b291ba11 3022 /* and do all the other regular work too */
64592c8f 3023 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3024 }
9c6bd790 3025}
f0706e82 3026
5bb644a0
JB		 3027#ifdef CONFIG_PM
3028void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3029{
3030 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3031
3032 /*
3033 * we need to use atomic bitops for the running bits
3034 * only because both timers might fire at the same
3035 * time -- the code here is properly synchronised.
3036 */
3037
d1f5b7a3
JB		 3038 cancel_work_sync(&ifmgd->request_smps_work);
3039
0ecfe806 3040 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3041 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 3042 if (del_timer_sync(&ifmgd->timer))
3043 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3044
3045 cancel_work_sync(&ifmgd->chswitch_work);
3046 if (del_timer_sync(&ifmgd->chswitch_timer))
3047 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3048
b291ba11
JB		 3049 /* these will just be re-established on connection */
3050 del_timer_sync(&ifmgd->conn_mon_timer);
3051 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3052}
3053
3054void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3055{
3056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3057
676b58c2
RM		 3058 if (!ifmgd->associated)
3059 return;
3060
95acac61
JB		 3061 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3062 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3063 mutex_lock(&ifmgd->mtx);
3064 if (ifmgd->associated) {
3065#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
3066 wiphy_debug(sdata->local->hw.wiphy,
3067 "%s: driver requested disconnect after resume.\n",
3068 sdata->name);
3069#endif
3070 ieee80211_sta_connection_lost(sdata,
3071 ifmgd->associated->bssid,
3072 WLAN_REASON_UNSPECIFIED);
3073 mutex_unlock(&ifmgd->mtx);
3074 return;
3075 }
3076 mutex_unlock(&ifmgd->mtx);
3077 }
3078
5bb644a0
JB		 3079 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3080 add_timer(&ifmgd->timer);
3081 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3082 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3083 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 3084 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 3085}
3086#endif
3087
9c6bd790
JB		 3088/* interface setup */
3089void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3090{
46900298 3091 struct ieee80211_if_managed *ifmgd;
988c0f72 3092
46900298 3093 ifmgd = &sdata->u.mgd;
b291ba11 3094 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3095 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3096 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3097 ieee80211_beacon_connection_loss_work);
d1f5b7a3 3098 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3099 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3100 (unsigned long) sdata);
b291ba11
JB		 3101 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3102 (unsigned long) sdata);
3103 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3104 (unsigned long) sdata);
46900298 3105 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3106 (unsigned long) sdata);
9c6bd790 3107
ab1faead 3108 ifmgd->flags = 0;
1478acb3 3109 ifmgd->powersave = sdata->wdev.ps;
bbbdff9e 3110
77fdaa12 3111 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3112
3113 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3114 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3115 else
3116 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3117}
3118
77fdaa12
JB		 3119/* scan finished notification */
3120void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3121{
77fdaa12 3122 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 3123
77fdaa12
JB		 3124 /* Restart STA timers */
3125 rcu_read_lock();
3126 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3127 ieee80211_restart_sta_timer(sdata);
3128 rcu_read_unlock();
3129}
60f8b39c 3130
77fdaa12
JB		 3131int ieee80211_max_network_latency(struct notifier_block *nb,
3132 unsigned long data, void *dummy)
3133{
3134 s32 latency_usec = (s32) data;
3135 struct ieee80211_local *local =
3136 container_of(nb, struct ieee80211_local,
3137 network_latency_notifier);
1fa6f4af 3138
77fdaa12
JB		 3139 mutex_lock(&local->iflist_mtx);
3140 ieee80211_recalc_ps(local, latency_usec);
3141 mutex_unlock(&local->iflist_mtx);
dfe67012 3142
77fdaa12 3143 return 0;
9c6bd790
JB		 3144}
3145
77fdaa12
JB		 3146/* config hooks */
3147int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3148 struct cfg80211_auth_request *req)
9c6bd790 3149{
66e67e41
JB		 3150 struct ieee80211_local *local = sdata->local;
3151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3152 struct ieee80211_mgd_auth_data *auth_data;
3153 struct sta_info *sta;
77fdaa12 3154 u16 auth_alg;
66e67e41
JB		 3155 int err;
3156
3157 /* prepare auth data structure */
9c6bd790 3158
77fdaa12
JB		 3159 switch (req->auth_type) {
3160 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3161 auth_alg = WLAN_AUTH_OPEN;
3162 break;
3163 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3164 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3165 return -EOPNOTSUPP;
77fdaa12
JB		 3166 auth_alg = WLAN_AUTH_SHARED_KEY;
3167 break;
3168 case NL80211_AUTHTYPE_FT:
3169 auth_alg = WLAN_AUTH_FT;
3170 break;
3171 case NL80211_AUTHTYPE_NETWORK_EAP:
3172 auth_alg = WLAN_AUTH_LEAP;
3173 break;
3174 default:
3175 return -EOPNOTSUPP;
60f8b39c 3176 }
77fdaa12 3177
66e67e41
JB		 3178 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3179 if (!auth_data)
9c6bd790 3180 return -ENOMEM;
77fdaa12 3181
66e67e41 3182 auth_data->bss = req->bss;
77fdaa12
JB		 3183
3184 if (req->ie && req->ie_len) {
66e67e41
JB		 3185 memcpy(auth_data->ie, req->ie, req->ie_len);
3186 auth_data->ie_len = req->ie_len;
9c6bd790 3187 }
77fdaa12 3188
fffd0934 3189 if (req->key && req->key_len) {
66e67e41
JB		 3190 auth_data->key_len = req->key_len;
3191 auth_data->key_idx = req->key_idx;
3192 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3193 }
3194
66e67e41 3195 auth_data->algorithm = auth_alg;
60f8b39c 3196
66e67e41 3197 /* try to authenticate/probe */
2a33bee2 3198
66e67e41 3199 mutex_lock(&ifmgd->mtx);
2a33bee2 3200
66e67e41
JB		 3201 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3202 ifmgd->assoc_data) {
3203 err = -EBUSY;
3204 goto err_free;
2a33bee2
GE		 3205 }
3206
66e67e41
JB		 3207 if (ifmgd->auth_data)
3208 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3209
66e67e41
JB		 3210 /* prep auth_data so we don't go into idle on disassoc */
3211 ifmgd->auth_data = auth_data;
af6b6374 3212
66e67e41 3213 if (ifmgd->associated)
37ad3888 3214 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3215
66e67e41
JB		 3216 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3217 sdata->name, req->bss->bssid);
e5b900d2 3218
66e67e41
JB		 3219 mutex_lock(&local->mtx);
3220 ieee80211_recalc_idle(sdata->local);
3221 mutex_unlock(&local->mtx);
e5b900d2 3222
66e67e41
JB		 3223 /* switch to the right channel */
3224 local->oper_channel = req->bss->channel;
3225 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
af6b6374 3226
66e67e41
JB		 3227 /* set BSSID */
3228 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3229 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
b2abb6e2 3230
66e67e41
JB		 3231 /* add station entry */
3232 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3233 if (!sta) {
3234 err = -ENOMEM;
3235 goto err_clear;
3236 }
68542962 3237
66e67e41
JB		 3238 err = sta_info_insert(sta);
3239 if (err) {
3240 printk(KERN_DEBUG
3241 "%s: failed to insert STA entry for the AP %pM (error %d)\n",
3242 sdata->name, req->bss->bssid, err);
3243 goto err_clear;
af6b6374
JB		 3244 }
3245
66e67e41
JB		 3246 err = ieee80211_probe_auth(sdata);
3247 if (err) {
3248 if (auth_data->synced)
3249 drv_finish_tx_sync(local, sdata, req->bss->bssid,
3250 IEEE80211_TX_SYNC_AUTH);
3251 sta_info_destroy_addr(sdata, req->bss->bssid);
3252 goto err_clear;
3253 }
3254
3255 /* hold our own reference */
3256 cfg80211_ref_bss(auth_data->bss);
3257 err = 0;
3258 goto out_unlock;
3259
3260 err_clear:
3261 ifmgd->auth_data = NULL;
3262 err_free:
3263 kfree(auth_data);
3264 out_unlock:
3265 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3266
66e67e41 3267 return err;
af6b6374
JB		 3268}
3269
77fdaa12
JB		 3270int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3271 struct cfg80211_assoc_request *req)
f0706e82 3272{
66e67e41 3273 struct ieee80211_local *local = sdata->local;
77fdaa12 3274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3275 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41
JB		 3276 struct ieee80211_mgd_assoc_data *assoc_data;
3277 struct sta_info *sta;
3278 const u8 *ssidie;
2a33bee2 3279 int i, err;
f0706e82 3280
66e67e41
JB		 3281 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3282 if (!ssidie)
3283 return -EINVAL;
3284
3285 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3286 if (!assoc_data)
3287 return -ENOMEM;
3288
77fdaa12 3289 mutex_lock(&ifmgd->mtx);
9c87ba67 3290
66e67e41 3291 if (ifmgd->associated)
37ad3888 3292 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3293
3294 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3295 err = -EBUSY;
3296 goto err_free;
af6b6374 3297 }
77fdaa12 3298
66e67e41
JB		 3299 if (ifmgd->assoc_data) {
3300 err = -EBUSY;
3301 goto err_free;
3302 }
77fdaa12 3303
66e67e41
JB		 3304 if (ifmgd->auth_data) {
3305 bool match;
3306
3307 /* keep sta info, bssid if matching */
888d04df 3308 match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
66e67e41 3309 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3310 }
3311
66e67e41
JB		 3312 /* prepare assoc data */
3313
77fdaa12 3314 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3315 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3316
d8ec4433
JO		 3317 ifmgd->beacon_crc_valid = false;
3318
77fdaa12
JB		 3319 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3320 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3321 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3322 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3323 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3324
ef96a842
BG		 3325 if (req->flags & ASSOC_REQ_DISABLE_HT)
3326 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3327
3328 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3329 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3330 sizeof(ifmgd->ht_capa_mask));
3331
77fdaa12 3332 if (req->ie && req->ie_len) {
66e67e41
JB		 3333 memcpy(assoc_data->ie, req->ie, req->ie_len);
3334 assoc_data->ie_len = req->ie_len;
3335 }
f679f65d 3336
66e67e41 3337 assoc_data->bss = req->bss;
f679f65d 3338
af6b6374
JB		 3339 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3340 if (ifmgd->powersave)
3341 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3342 else
3343 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3344 } else
3345 ifmgd->ap_smps = ifmgd->req_smps;
3346
77c8144a
JB		 3347 /*
3348 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3349 * We still associate in non-HT mode (11a/b/g) if any one of these
3350 * ciphers is configured as pairwise.
3351 * We can set this to true for non-11n hardware, that'll be checked
3352 * separately along with the peer capabilities.
3353 */
66e67e41
JB		 3354 assoc_data->capability = req->bss->capability;
3355 assoc_data->wmm_used = bss->wmm_used;
3356 assoc_data->supp_rates = bss->supp_rates;
3357 assoc_data->supp_rates_len = bss->supp_rates_len;
3358 assoc_data->ht_information_ie =
f679f65d 3359 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 3360
ab13315a
KV		 3361 if (bss->wmm_used && bss->uapsd_supported &&
3362 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
66e67e41 3363 assoc_data->uapsd_used = true;
ab13315a
KV		 3364 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3365 } else {
66e67e41 3366 assoc_data->uapsd_used = false;
ab13315a
KV		 3367 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3368 }
3369
66e67e41
JB		 3370 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3371 assoc_data->ssid_len = ssidie[1];
63f170e0 3372
77fdaa12 3373 if (req->prev_bssid)
66e67e41 3374 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3375
3376 if (req->use_mfp) {
3377 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3378 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3379 } else {
3380 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3381 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3382 }
3383
3384 if (req->crypto.control_port)
3385 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3386 else
3387 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3388
a621fa4d
JB		 3389 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3390 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3391
66e67e41
JB		 3392 /* kick off associate process */
3393
3394 ifmgd->assoc_data = assoc_data;
3395
3396 mutex_lock(&local->mtx);
3397 ieee80211_recalc_idle(sdata->local);
3398 mutex_unlock(&local->mtx);
3399
3400 /* switch to the right channel */
3401 local->oper_channel = req->bss->channel;
3402 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3403
3404 rcu_read_lock();
3405 sta = sta_info_get(sdata, req->bss->bssid);
3406 rcu_read_unlock();
3407
3408 if (!sta) {
3409 /* set BSSID */
3410 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3411 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3412
3413 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3414 if (!sta) {
3415 err = -ENOMEM;
3416 goto err_clear;
3417 }
3418
3419 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3420
3421 err = sta_info_insert(sta);
3422 sta = NULL;
3423 if (err) {
3424 printk(KERN_DEBUG
3425 "%s: failed to insert STA entry for the AP (error %d)\n",
3426 sdata->name, err);
3427 goto err_clear;
3428 }
3429 } else
888d04df 3430 WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, req->bss->bssid));
66e67e41
JB		 3431
3432 if (!bss->dtim_period &&
3433 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3434 /*
3435 * Wait up to one beacon interval ...
3436 * should this be more if we miss one?
3437 */
3438 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3439 sdata->name, ifmgd->bssid);
3440 assoc_data->timeout = jiffies +
3441 TU_TO_EXP_TIME(req->bss->beacon_interval);
3442 } else {
3443 assoc_data->have_beacon = true;
3444 assoc_data->sent_assoc = false;
3445 assoc_data->timeout = jiffies;
3446 }
3447 run_again(ifmgd, assoc_data->timeout);
3448
3449 err = 0;
3450 goto out;
3451 err_clear:
3452 ifmgd->assoc_data = NULL;
3453 err_free:
3454 kfree(assoc_data);
3455 out:
3456 mutex_unlock(&ifmgd->mtx);
3457
3458 return err;
f0706e82
JB		 3459}
3460
77fdaa12 3461int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3462 struct cfg80211_deauth_request *req)
f0706e82 3463{
46900298 3464 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3465 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3466
77fdaa12
JB		 3467 mutex_lock(&ifmgd->mtx);
3468
37ad3888 3469 if (ifmgd->auth_data) {
66e67e41 3470 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3471 mutex_unlock(&ifmgd->mtx);
66e67e41 3472 return 0;
af6b6374 3473 }
77fdaa12 3474
37ad3888
JB		 3475 printk(KERN_DEBUG
3476 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3477 sdata->name, req->bssid, req->reason_code);
0ff71613 3478
37ad3888 3479 if (ifmgd->associated &&
888d04df 3480 compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
37ad3888 3481 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3482 req->reason_code, true, frame_buf);
37ad3888
JB		 3483 else
3484 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3485 IEEE80211_STYPE_DEAUTH,
3486 req->reason_code, true,
3487 frame_buf);
3488 mutex_unlock(&ifmgd->mtx);
3489
5fef7dbc 3490 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3491
7da7cc1d 3492 mutex_lock(&sdata->local->mtx);
bc83b681 3493 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3494 mutex_unlock(&sdata->local->mtx);
bc83b681 3495
f0706e82
JB		 3496 return 0;
3497}
84363e6e 3498
77fdaa12 3499int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3500 struct cfg80211_disassoc_request *req)
9c6bd790 3501{
77fdaa12 3502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3503 u8 bssid[ETH_ALEN];
5fef7dbc 3504 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3505
77fdaa12 3506 mutex_lock(&ifmgd->mtx);
10f644a4 3507
8d8b261a
JB		 3508 /*
3509 * cfg80211 should catch this ... but it's racy since
3510 * we can receive a disassoc frame, process it, hand it
3511 * to cfg80211 while that's in a locked section already
3512 * trying to tell us that the user wants to disconnect.
3513 */
0c1ad2ca 3514 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3515 mutex_unlock(&ifmgd->mtx);
3516 return -ENOLINK;
3517 }
3518
0ff71613 3519 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3520 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3521
e69e95db 3522 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3523 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3524 req->reason_code, !req->local_state_change,
3525 frame_buf);
77fdaa12 3526 mutex_unlock(&ifmgd->mtx);
10f644a4 3527
5fef7dbc 3528 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3529
7da7cc1d 3530 mutex_lock(&sdata->local->mtx);
bc83b681 3531 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3532 mutex_unlock(&sdata->local->mtx);
bc83b681 3533
10f644a4
JB		 3534 return 0;
3535}
026331c4 3536
54e4ffb2
JB		 3537void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3538{
3539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3540
3541 mutex_lock(&ifmgd->mtx);
3542 if (ifmgd->assoc_data)
3543 ieee80211_destroy_assoc_data(sdata, false);
3544 if (ifmgd->auth_data)
3545 ieee80211_destroy_auth_data(sdata, false);
3546 del_timer_sync(&ifmgd->timer);
3547 mutex_unlock(&ifmgd->mtx);
3548}
3549
a97c13c3
JO		 3550void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3551 enum nl80211_cqm_rssi_threshold_event rssi_event,
3552 gfp_t gfp)
3553{
3554 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3555
b5878a2d
JB		 3556 trace_api_cqm_rssi_notify(sdata, rssi_event);
3557
a97c13c3
JO		 3558 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3559}
3560EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3561
3562unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3563{
3564 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3565 return sdata->dev->operstate;
3566}
3567EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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