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mac80211: move misplaced comment
[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;
3cc5240b 1397 u32 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
413ad50a
JB		 1457 /* on the next assoc, re-program HT parameters */
1458 sdata->ht_opmode_valid = false;
ef96a842
BG		 1459 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1460 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1461
a8302de9
VT		 1462 local->power_constr_level = 0;
1463
520eb820
KV		 1464 del_timer_sync(&local->dynamic_ps_timer);
1465 cancel_work_sync(&local->dynamic_ps_enable_work);
1466
e0cb686f
KV		 1467 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1468 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1469 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1470 }
a331400b 1471 local->ps_sdata = NULL;
ae5eb026 1472
68542962
JO		 1473 /* Disable ARP filtering */
1474 if (sdata->vif.bss_conf.arp_filter_enabled) {
1475 sdata->vif.bss_conf.arp_filter_enabled = false;
1476 changed |= BSS_CHANGED_ARP_FILTER;
1477 }
1478
3abead59
JB		 1479 sdata->vif.bss_conf.qos = false;
1480 changed |= BSS_CHANGED_QOS;
1481
0aaffa9b
JB		 1482 /* The BSSID (not really interesting) and HT changed */
1483 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1484 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1485
3cc5240b
JB		 1486 /* channel(_type) changes are handled by ieee80211_hw_config */
1487 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1488 ieee80211_hw_config(local, 0);
1489
3abead59
JB		 1490 /* disassociated - set to defaults now */
1491 ieee80211_set_wmm_default(sdata, false);
1492
b9dcf712
JB		 1493 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1494 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1495 del_timer_sync(&sdata->u.mgd.timer);
1496 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1497}
f0706e82 1498
3cf335d5
KV		 1499void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1500 struct ieee80211_hdr *hdr)
1501{
1502 /*
1503 * We can postpone the mgd.timer whenever receiving unicast frames
1504 * from AP because we know that the connection is working both ways
1505 * at that time. But multicast frames (and hence also beacons) must
1506 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1507 * data idle periods for sending the periodic probe request to the
1508 * AP we're connected to.
3cf335d5 1509 */
b291ba11
JB		 1510 if (is_multicast_ether_addr(hdr->addr1))
1511 return;
1512
be099e82 1513 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1514}
f0706e82 1515
4e5ff376
FF		 1516static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1517{
1518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1519
1520 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1521 IEEE80211_STA_CONNECTION_POLL)))
1522 return;
1523
1524 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1525 IEEE80211_STA_BEACON_POLL);
1526 mutex_lock(&sdata->local->iflist_mtx);
1527 ieee80211_recalc_ps(sdata->local, -1);
1528 mutex_unlock(&sdata->local->iflist_mtx);
1529
1530 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1531 return;
1532
1533 /*
1534 * We've received a probe response, but are not sure whether
1535 * we have or will be receiving any beacons or data, so let's
1536 * schedule the timers again, just in case.
1537 */
1538 ieee80211_sta_reset_beacon_monitor(sdata);
1539
1540 mod_timer(&ifmgd->conn_mon_timer,
1541 round_jiffies_up(jiffies +
1542 IEEE80211_CONNECTION_IDLE_TIME));
1543}
1544
1545void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1546 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1547{
75706d0e 1548 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1549 return;
1550
04ac3c0e
FF		 1551 if (ack)
1552 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1553
1554 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1555 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1556 if (ack)
1557 sdata->u.mgd.probe_send_count = 0;
1558 else
1559 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1560 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1561 }
1562}
1563
a43abf29
ML		 1564static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1565{
1566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1567 const u8 *ssid;
f01a067d 1568 u8 *dst = ifmgd->associated->bssid;
180205bd 1569 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1570
1571 /*
1572 * Try sending broadcast probe requests for the last three
1573 * probe requests after the first ones failed since some
1574 * buggy APs only support broadcast probe requests.
1575 */
1576 if (ifmgd->probe_send_count >= unicast_limit)
1577 dst = NULL;
a43abf29 1578
4e5ff376
FF		 1579 /*
1580 * When the hardware reports an accurate Tx ACK status, it's
1581 * better to send a nullfunc frame instead of a probe request,
1582 * as it will kick us off the AP quickly if we aren't associated
1583 * anymore. The timeout will be reset if the frame is ACKed by
1584 * the AP.
1585 */
04ac3c0e
FF		 1586 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1587 ifmgd->nullfunc_failed = false;
4e5ff376 1588 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1589 } else {
4e5ff376 1590 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1591 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1592 (u32) -1, true, false);
4e5ff376 1593 }
a43abf29
ML		 1594
1595 ifmgd->probe_send_count++;
180205bd 1596 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1597 run_again(ifmgd, ifmgd->probe_timeout);
1598}
1599
b291ba11
JB		 1600static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1601 bool beacon)
04de8381 1602{
04de8381 1603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1604 bool already = false;
34bfc411 1605
9607e6b6 1606 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1607 return;
1608
91a3bd76
LR		 1609 if (sdata->local->scanning)
1610 return;
1611
b8bc4b0a
JB		 1612 if (sdata->local->tmp_channel)
1613 return;
1614
77fdaa12
JB		 1615 mutex_lock(&ifmgd->mtx);
1616
1617 if (!ifmgd->associated)
1618 goto out;
1619
a860402d 1620#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1621 if (beacon && net_ratelimit())
1622 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1623 "- sending probe request\n", sdata->name);
a860402d 1624#endif
04de8381 1625
b291ba11
JB		 1626 /*
1627 * The driver/our work has already reported this event or the
1628 * connection monitoring has kicked in and we have already sent
1629 * a probe request. Or maybe the AP died and the driver keeps
1630 * reporting until we disassociate...
1631 *
1632 * In either case we have to ignore the current call to this
1633 * function (except for setting the correct probe reason bit)
1634 * because otherwise we would reset the timer every time and
1635 * never check whether we received a probe response!
1636 */
1637 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1638 IEEE80211_STA_CONNECTION_POLL))
1639 already = true;
1640
1641 if (beacon)
1642 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1643 else
1644 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1645
1646 if (already)
1647 goto out;
1648
4e751843
JB		 1649 mutex_lock(&sdata->local->iflist_mtx);
1650 ieee80211_recalc_ps(sdata->local, -1);
1651 mutex_unlock(&sdata->local->iflist_mtx);
1652
a43abf29
ML		 1653 ifmgd->probe_send_count = 0;
1654 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1655 out:
1656 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1657}
1658
a619a4c0
JO		 1659struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1660 struct ieee80211_vif *vif)
1661{
1662 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1664 struct sk_buff *skb;
1665 const u8 *ssid;
1666
1667 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1668 return NULL;
1669
1670 ASSERT_MGD_MTX(ifmgd);
1671
1672 if (!ifmgd->associated)
1673 return NULL;
1674
1675 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1676 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1677 (u32) -1, ssid + 2, ssid[1],
1678 NULL, 0, true);
a619a4c0
JO		 1679
1680 return skb;
1681}
1682EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1683
1e4dcd01
JO		 1684static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1685{
1686 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1687 struct ieee80211_local *local = sdata->local;
1688 u8 bssid[ETH_ALEN];
5fef7dbc 1689 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1690
1691 mutex_lock(&ifmgd->mtx);
1692 if (!ifmgd->associated) {
1693 mutex_unlock(&ifmgd->mtx);
1694 return;
1695 }
1696
1697 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1698
180205bd
BG		 1699 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1700 sdata->name, bssid);
1e4dcd01 1701
37ad3888
JB		 1702 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1703 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1704 false, frame_buf);
1e4dcd01 1705 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1706
1e4dcd01
JO		 1707 /*
1708 * must be outside lock due to cfg80211,
1709 * but that's not a problem.
1710 */
5fef7dbc 1711 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1712
1713 mutex_lock(&local->mtx);
1714 ieee80211_recalc_idle(local);
1715 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1716}
1717
1718void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1719{
1720 struct ieee80211_sub_if_data *sdata =
1721 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1722 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1724 struct sta_info *sta;
1725
1726 if (ifmgd->associated) {
30fa9047 1727 rcu_read_lock();
a85e1d55
PS		 1728 sta = sta_info_get(sdata, ifmgd->bssid);
1729 if (sta)
1730 sta->beacon_loss_count++;
30fa9047 1731 rcu_read_unlock();
a85e1d55 1732 }
b291ba11 1733
1e4dcd01
JO		 1734 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1735 __ieee80211_connection_loss(sdata);
1736 else
1737 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1738}
1739
04de8381
KV		 1740void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1741{
1742 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1743 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1744
b5878a2d
JB		 1745 trace_api_beacon_loss(sdata);
1746
1e4dcd01
JO		 1747 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1748 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1749}
1750EXPORT_SYMBOL(ieee80211_beacon_loss);
1751
1e4dcd01
JO		 1752void ieee80211_connection_loss(struct ieee80211_vif *vif)
1753{
1754 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1755 struct ieee80211_hw *hw = &sdata->local->hw;
1756
b5878a2d
JB		 1757 trace_api_connection_loss(sdata);
1758
1e4dcd01
JO		 1759 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1760 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1761}
1762EXPORT_SYMBOL(ieee80211_connection_loss);
1763
1764
66e67e41
JB		 1765static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1766 bool assoc)
1767{
1768 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1769
1770 lockdep_assert_held(&sdata->u.mgd.mtx);
1771
66e67e41
JB		 1772 if (!assoc) {
1773 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1774
1775 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1776 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1777 }
1778
1779 cfg80211_put_bss(auth_data->bss);
1780 kfree(auth_data);
1781 sdata->u.mgd.auth_data = NULL;
1782}
1783
1784static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1785 struct ieee80211_mgmt *mgmt, size_t len)
1786{
1787 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1788 u8 *pos;
1789 struct ieee802_11_elems elems;
1790
1791 pos = mgmt->u.auth.variable;
1792 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1793 if (!elems.challenge)
1794 return;
1795 auth_data->expected_transaction = 4;
1796 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1797 elems.challenge - 2, elems.challenge_len + 2,
1798 auth_data->bss->bssid, auth_data->bss->bssid,
1799 auth_data->key, auth_data->key_len,
1800 auth_data->key_idx);
1801}
1802
1803static enum rx_mgmt_action __must_check
1804ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1805 struct ieee80211_mgmt *mgmt, size_t len)
1806{
1807 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1808 u8 bssid[ETH_ALEN];
1809 u16 auth_alg, auth_transaction, status_code;
1810 struct sta_info *sta;
1811
1812 lockdep_assert_held(&ifmgd->mtx);
1813
1814 if (len < 24 + 6)
1815 return RX_MGMT_NONE;
1816
1817 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1818 return RX_MGMT_NONE;
1819
1820 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1821
888d04df 1822 if (compare_ether_addr(bssid, mgmt->bssid))
66e67e41
JB		 1823 return RX_MGMT_NONE;
1824
1825 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1826 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1827 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1828
1829 if (auth_alg != ifmgd->auth_data->algorithm ||
1830 auth_transaction != ifmgd->auth_data->expected_transaction)
1831 return RX_MGMT_NONE;
1832
1833 if (status_code != WLAN_STATUS_SUCCESS) {
1834 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1835 sdata->name, mgmt->sa, status_code);
1836 goto out;
1837 }
1838
1839 switch (ifmgd->auth_data->algorithm) {
1840 case WLAN_AUTH_OPEN:
1841 case WLAN_AUTH_LEAP:
1842 case WLAN_AUTH_FT:
1843 break;
1844 case WLAN_AUTH_SHARED_KEY:
1845 if (ifmgd->auth_data->expected_transaction != 4) {
1846 ieee80211_auth_challenge(sdata, mgmt, len);
1847 /* need another frame */
1848 return RX_MGMT_NONE;
1849 }
1850 break;
1851 default:
1852 WARN_ONCE(1, "invalid auth alg %d",
1853 ifmgd->auth_data->algorithm);
1854 return RX_MGMT_NONE;
1855 }
1856
1857 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1858 out:
66e67e41
JB		 1859 ifmgd->auth_data->done = true;
1860 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1861 run_again(ifmgd, ifmgd->auth_data->timeout);
1862
1863 /* move station state to auth */
1864 mutex_lock(&sdata->local->sta_mtx);
1865 sta = sta_info_get(sdata, bssid);
1866 if (!sta) {
1867 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1868 goto out_err;
1869 }
1870 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1871 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1872 sdata->name, bssid);
1873 goto out_err;
1874 }
1875 mutex_unlock(&sdata->local->sta_mtx);
1876
1877 return RX_MGMT_CFG80211_RX_AUTH;
1878 out_err:
1879 mutex_unlock(&sdata->local->sta_mtx);
1880 /* ignore frame -- wait for timeout */
1881 return RX_MGMT_NONE;
1882}
1883
1884
77fdaa12
JB		 1885static enum rx_mgmt_action __must_check
1886ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1887 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1888{
46900298 1889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1890 const u8 *bssid = NULL;
f0706e82
JB		 1891 u16 reason_code;
1892
66e67e41
JB		 1893 lockdep_assert_held(&ifmgd->mtx);
1894
f4ea83dd 1895 if (len < 24 + 2)
77fdaa12 1896 return RX_MGMT_NONE;
f0706e82 1897
66e67e41 1898 if (!ifmgd->associated ||
888d04df 1899 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1900 return RX_MGMT_NONE;
77fdaa12 1901
0c1ad2ca 1902 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1903
1904 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1905
77fdaa12 1906 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1907 sdata->name, bssid, reason_code);
77fdaa12 1908
37ad3888
JB		 1909 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1910
7da7cc1d 1911 mutex_lock(&sdata->local->mtx);
63f170e0 1912 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1913 mutex_unlock(&sdata->local->mtx);
f0706e82 1914
77fdaa12 1915 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1916}
1917
1918
77fdaa12
JB		 1919static enum rx_mgmt_action __must_check
1920ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1921 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1922{
46900298 1923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1924 u16 reason_code;
1925
66e67e41 1926 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1927
66e67e41 1928 if (len < 24 + 2)
77fdaa12
JB		 1929 return RX_MGMT_NONE;
1930
66e67e41 1931 if (!ifmgd->associated ||
888d04df 1932 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1933 return RX_MGMT_NONE;
f0706e82
JB		 1934
1935 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1936
0ff71613 1937 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1938 sdata->name, mgmt->sa, reason_code);
f0706e82 1939
37ad3888
JB		 1940 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1941
7da7cc1d 1942 mutex_lock(&sdata->local->mtx);
bc83b681 1943 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1944 mutex_unlock(&sdata->local->mtx);
37ad3888 1945
77fdaa12 1946 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1947}
1948
c74d084f
CL		 1949static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1950 u8 *supp_rates, unsigned int supp_rates_len,
1951 u32 *rates, u32 *basic_rates,
1952 bool *have_higher_than_11mbit,
1953 int *min_rate, int *min_rate_index)
1954{
1955 int i, j;
1956
1957 for (i = 0; i < supp_rates_len; i++) {
1958 int rate = (supp_rates[i] & 0x7f) * 5;
1959 bool is_basic = !!(supp_rates[i] & 0x80);
1960
1961 if (rate > 110)
1962 *have_higher_than_11mbit = true;
1963
1964 /*
1965 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1966 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1967 *
1968 * Note: Even through the membership selector and the basic
1969 * rate flag share the same bit, they are not exactly
1970 * the same.
1971 */
1972 if (!!(supp_rates[i] & 0x80) &&
1973 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1974 continue;
1975
1976 for (j = 0; j < sband->n_bitrates; j++) {
1977 if (sband->bitrates[j].bitrate == rate) {
1978 *rates |= BIT(j);
1979 if (is_basic)
1980 *basic_rates |= BIT(j);
1981 if (rate < *min_rate) {
1982 *min_rate = rate;
1983 *min_rate_index = j;
1984 }
1985 break;
1986 }
1987 }
1988 }
1989}
f0706e82 1990
66e67e41
JB		 1991static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1992 bool assoc)
1993{
1994 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1995
1996 lockdep_assert_held(&sdata->u.mgd.mtx);
1997
66e67e41
JB		 1998 if (!assoc) {
1999 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2000
2001 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2002 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2003 }
2004
2005 kfree(assoc_data);
2006 sdata->u.mgd.assoc_data = NULL;
2007}
2008
2009static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2010 struct cfg80211_bss *cbss,
af6b6374 2011 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2012{
46900298 2013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2014 struct ieee80211_local *local = sdata->local;
8318d78a 2015 struct ieee80211_supported_band *sband;
f0706e82 2016 struct sta_info *sta;
af6b6374 2017 u8 *pos;
881d948c 2018 u32 rates, basic_rates;
af6b6374 2019 u16 capab_info, aid;
f0706e82 2020 struct ieee802_11_elems elems;
bda3933a 2021 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2022 u32 changed = 0;
c74d084f 2023 int err;
5d1ec85f 2024 bool have_higher_than_11mbit = false;
ae5eb026 2025 u16 ap_ht_cap_flags;
3432f923 2026 int min_rate = INT_MAX, min_rate_index = -1;
f0706e82 2027
af6b6374 2028 /* AssocResp and ReassocResp have identical structure */
f0706e82 2029
f0706e82 2030 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2031 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2032
1dd84aa2 2033 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 2034 printk(KERN_DEBUG
2035 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2036 sdata->name, aid);
1dd84aa2
JB		 2037 aid &= ~(BIT(15) | BIT(14));
2038
05cb9108
JB		 2039 ifmgd->broken_ap = false;
2040
2041 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2042 printk(KERN_DEBUG
2043 "%s: invalid AID value %d (out of range), turn off PS\n",
2044 sdata->name, aid);
2045 aid = 0;
2046 ifmgd->broken_ap = true;
2047 }
2048
af6b6374
JB		 2049 pos = mgmt->u.assoc_resp.variable;
2050 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2051
f0706e82
JB		 2052 if (!elems.supp_rates) {
2053 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 2054 sdata->name);
af6b6374 2055 return false;
f0706e82
JB		 2056 }
2057
46900298 2058 ifmgd->aid = aid;
f0706e82 2059
2a33bee2
GE		 2060 mutex_lock(&sdata->local->sta_mtx);
2061 /*
2062 * station info was already allocated and inserted before
2063 * the association and should be available to us
2064 */
7852e361 2065 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2066 if (WARN_ON(!sta)) {
2067 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2068 return false;
77fdaa12 2069 }
05e5e883 2070
60f8b39c
JB		 2071 rates = 0;
2072 basic_rates = 0;
66e67e41 2073 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2074
c74d084f
CL		 2075 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
2076 &rates, &basic_rates, &have_higher_than_11mbit,
2077 &min_rate, &min_rate_index);
f0706e82 2078
c74d084f
CL		 2079 ieee80211_get_rates(sband, elems.ext_supp_rates,
2080 elems.ext_supp_rates_len, &rates, &basic_rates,
2081 &have_higher_than_11mbit,
2082 &min_rate, &min_rate_index);
f0706e82 2083
3432f923
EP		 2084 /*
2085 * some buggy APs don't advertise basic_rates. use the lowest
2086 * supported rate instead.
2087 */
2088 if (unlikely(!basic_rates) && min_rate_index >= 0) {
2089 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
2090 "Using min supported rate instead.\n", sdata->name);
2091 basic_rates = BIT(min_rate_index);
2092 }
2093
66e67e41 2094 sta->sta.supp_rates[local->oper_channel->band] = rates;
bda3933a 2095 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 2096
2097 /* cf. IEEE 802.11 9.2.12 */
66e67e41 2098 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 2099 have_higher_than_11mbit)
2100 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2101 else
2102 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2103
ab1faead 2104 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2105 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2106 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 2107
2108 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 2109
4b7679a5 2110 rate_control_rate_init(sta);
f0706e82 2111
46900298 2112 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2113 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2114
ddf4ac53 2115 if (elems.wmm_param)
c2c98fde 2116 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2117
c8987876
JB		 2118 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2119 if (!err)
2120 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2121 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2122 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2123 if (err) {
2124 printk(KERN_DEBUG
2125 "%s: failed to move station %pM to desired state\n",
2126 sdata->name, sta->sta.addr);
2127 WARN_ON(__sta_info_destroy(sta));
2128 mutex_unlock(&sdata->local->sta_mtx);
2129 return false;
2130 }
2131
7852e361 2132 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2133
f2176d72
JO		 2134 /*
2135 * Always handle WMM once after association regardless
2136 * of the first value the AP uses. Setting -1 here has
2137 * that effect because the AP values is an unsigned
2138 * 4-bit value.
2139 */
2140 ifmgd->wmm_last_param_set = -1;
2141
ddf4ac53 2142 if (elems.wmm_param)
4ced3f74 2143 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2144 elems.wmm_param_len);
aa837e1d 2145 else
3abead59
JB		 2146 ieee80211_set_wmm_default(sdata, false);
2147 changed |= BSS_CHANGED_QOS;
f0706e82 2148
ae5eb026 2149 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 2150 (sdata->local->hw.queues >= 4) &&
ab1faead 2151 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 2152 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 2153 cbss->bssid, ap_ht_cap_flags,
2154 false);
ae5eb026 2155
60f8b39c
JB		 2156 /* set AID and assoc capability,
2157 * ieee80211_set_associated() will tell the driver */
2158 bss_conf->aid = aid;
2159 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2160 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2161
d524215f
FF		 2162 /*
2163 * If we're using 4-addr mode, let the AP know that we're
2164 * doing so, so that it can create the STA VLAN on its side
2165 */
2166 if (ifmgd->use_4addr)
2167 ieee80211_send_4addr_nullfunc(local, sdata);
2168
15b7b062 2169 /*
b291ba11
JB		 2170 * Start timer to probe the connection to the AP now.
2171 * Also start the timer that will detect beacon loss.
15b7b062 2172 */
b291ba11 2173 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2174 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2175
af6b6374 2176 return true;
f0706e82
JB		 2177}
2178
66e67e41
JB		 2179static enum rx_mgmt_action __must_check
2180ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2181 struct ieee80211_mgmt *mgmt, size_t len,
2182 struct cfg80211_bss **bss)
2183{
2184 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2185 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2186 u16 capab_info, status_code, aid;
2187 struct ieee802_11_elems elems;
2188 u8 *pos;
2189 bool reassoc;
2190
2191 lockdep_assert_held(&ifmgd->mtx);
2192
2193 if (!assoc_data)
2194 return RX_MGMT_NONE;
888d04df 2195 if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2196 return RX_MGMT_NONE;
2197
2198 /*
2199 * AssocResp and ReassocResp have identical structure, so process both
2200 * of them in this function.
2201 */
2202
2203 if (len < 24 + 6)
2204 return RX_MGMT_NONE;
2205
2206 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2207 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2208 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2209 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2210
2211 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2212 "status=%d aid=%d)\n",
2213 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2214 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2215
2216 pos = mgmt->u.assoc_resp.variable;
2217 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2218
2219 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2220 elems.timeout_int && elems.timeout_int_len == 5 &&
2221 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2222 u32 tu, ms;
2223 tu = get_unaligned_le32(elems.timeout_int + 1);
2224 ms = tu * 1024 / 1000;
2225 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2226 "comeback duration %u TU (%u ms)\n",
2227 sdata->name, mgmt->sa, tu, ms);
2228 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2229 if (ms > IEEE80211_ASSOC_TIMEOUT)
2230 run_again(ifmgd, assoc_data->timeout);
2231 return RX_MGMT_NONE;
2232 }
2233
2234 *bss = assoc_data->bss;
2235
2236 if (status_code != WLAN_STATUS_SUCCESS) {
2237 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2238 sdata->name, mgmt->sa, status_code);
2239 ieee80211_destroy_assoc_data(sdata, false);
2240 } else {
2241 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2242
66e67e41
JB		 2243 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2244 /* oops -- internal error -- send timeout for now */
79ebfb85 2245 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2246 sta_info_destroy_addr(sdata, mgmt->bssid);
2247 cfg80211_put_bss(*bss);
2248 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2249 }
79ebfb85
JB		 2250
2251 /*
2252 * destroy assoc_data afterwards, as otherwise an idle
2253 * recalc after assoc_data is NULL but before associated
2254 * is set can cause the interface to go idle
2255 */
2256 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2257 }
2258
2259 return RX_MGMT_CFG80211_RX_ASSOC;
2260}
98c8fccf
JB		 2261static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2262 struct ieee80211_mgmt *mgmt,
2263 size_t len,
2264 struct ieee80211_rx_status *rx_status,
2265 struct ieee802_11_elems *elems,
2266 bool beacon)
2267{
2268 struct ieee80211_local *local = sdata->local;
2269 int freq;
c2b13452 2270 struct ieee80211_bss *bss;
98c8fccf 2271 struct ieee80211_channel *channel;
56007a02
JB		 2272 bool need_ps = false;
2273
66e67e41 2274 if (sdata->u.mgd.associated &&
888d04df
FF		 2275 compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
2276 == 0) {
56007a02
JB		 2277 bss = (void *)sdata->u.mgd.associated->priv;
2278 /* not previously set so we may need to recalc */
2279 need_ps = !bss->dtim_period;
2280 }
98c8fccf
JB		 2281
2282 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2283 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2284 rx_status->band);
98c8fccf
JB		 2285 else
2286 freq = rx_status->freq;
2287
2288 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2289
2290 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2291 return;
2292
98c8fccf 2293 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2294 channel, beacon);
77fdaa12
JB		 2295 if (bss)
2296 ieee80211_rx_bss_put(local, bss);
2297
2298 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2299 return;
2300
56007a02
JB		 2301 if (need_ps) {
2302 mutex_lock(&local->iflist_mtx);
2303 ieee80211_recalc_ps(local, -1);
2304 mutex_unlock(&local->iflist_mtx);
2305 }
2306
c481ec97 2307 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2308 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2309 ETH_ALEN) == 0)) {
c481ec97
S		 2310 struct ieee80211_channel_sw_ie *sw_elem =
2311 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2312 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2313 bss, rx_status->mactime);
c481ec97 2314 }
f0706e82
JB		 2315}
2316
2317
f698d856 2318static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2319 struct sk_buff *skb)
f0706e82 2320{
af6b6374 2321 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2322 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2323 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2324 size_t baselen, len = skb->len;
ae6a44e3
EK		 2325 struct ieee802_11_elems elems;
2326
15b7b062
KV		 2327 ifmgd = &sdata->u.mgd;
2328
77fdaa12
JB		 2329 ASSERT_MGD_MTX(ifmgd);
2330
888d04df 2331 if (compare_ether_addr(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2332 return; /* ignore ProbeResp to foreign address */
2333
ae6a44e3
EK		 2334 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2335 if (baselen > len)
2336 return;
2337
2338 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2339 &elems);
2340
98c8fccf 2341 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2342
77fdaa12 2343 if (ifmgd->associated &&
888d04df 2344 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
4e5ff376 2345 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2346
2347 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
888d04df
FF		 2348 compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
2349 == 0) {
66e67e41
JB		 2350 /* got probe response, continue with auth */
2351 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2352 ifmgd->auth_data->tries = 0;
2353 ifmgd->auth_data->timeout = jiffies;
2354 run_again(ifmgd, ifmgd->auth_data->timeout);
2355 }
f0706e82
JB		 2356}
2357
d91f36db
JB		 2358/*
2359 * This is the canonical list of information elements we care about,
2360 * the filter code also gives us all changes to the Microsoft OUI
2361 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2362 *
2363 * We implement beacon filtering in software since that means we can
2364 * avoid processing the frame here and in cfg80211, and userspace
2365 * will not be able to tell whether the hardware supports it or not.
2366 *
2367 * XXX: This list needs to be dynamic -- userspace needs to be able to
2368 * add items it requires. It also needs to be able to tell us to
2369 * look out for other vendor IEs.
2370 */
2371static const u64 care_about_ies =
1d4df3a5
JB		 2372 (1ULL << WLAN_EID_COUNTRY) |
2373 (1ULL << WLAN_EID_ERP_INFO) |
2374 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2375 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2376 (1ULL << WLAN_EID_HT_CAPABILITY) |
2377 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 2378
f698d856 2379static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2380 struct ieee80211_mgmt *mgmt,
2381 size_t len,
2382 struct ieee80211_rx_status *rx_status)
2383{
d91f36db 2384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2385 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2386 size_t baselen;
2387 struct ieee802_11_elems elems;
f698d856 2388 struct ieee80211_local *local = sdata->local;
471b3efd 2389 u32 changed = 0;
d91f36db 2390 bool erp_valid, directed_tim = false;
7a5158ef 2391 u8 erp_value = 0;
d91f36db 2392 u32 ncrc;
77fdaa12
JB		 2393 u8 *bssid;
2394
66e67e41 2395 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2396
ae6a44e3
EK		 2397 /* Process beacon from the current BSS */
2398 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2399 if (baselen > len)
2400 return;
2401
d91f36db 2402 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2403 return;
f0706e82 2404
66e67e41 2405 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
888d04df
FF		 2406 compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
2407 == 0) {
66e67e41
JB		 2408 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2409 len - baselen, &elems);
77fdaa12 2410
66e67e41
JB		 2411 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2412 false);
2413 ifmgd->assoc_data->have_beacon = true;
2414 ifmgd->assoc_data->sent_assoc = false;
2415 /* continue assoc process */
2416 ifmgd->assoc_data->timeout = jiffies;
2417 run_again(ifmgd, ifmgd->assoc_data->timeout);
2418 return;
2419 }
77fdaa12 2420
66e67e41 2421 if (!ifmgd->associated ||
888d04df 2422 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2423 return;
66e67e41 2424 bssid = ifmgd->associated->bssid;
f0706e82 2425
17e4ec14
JM		 2426 /* Track average RSSI from the Beacon frames of the current AP */
2427 ifmgd->last_beacon_signal = rx_status->signal;
2428 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2429 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2430 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2431 ifmgd->last_cqm_event_signal = 0;
391a200a 2432 ifmgd->count_beacon_signal = 1;
615f7b9b 2433 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2434 } else {
2435 ifmgd->ave_beacon_signal =
2436 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2437 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2438 ifmgd->ave_beacon_signal) / 16;
391a200a 2439 ifmgd->count_beacon_signal++;
17e4ec14 2440 }
615f7b9b
MV		 2441
2442 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2443 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2444 int sig = ifmgd->ave_beacon_signal;
2445 int last_sig = ifmgd->last_ave_beacon_signal;
2446
2447 /*
2448 * if signal crosses either of the boundaries, invoke callback
2449 * with appropriate parameters
2450 */
2451 if (sig > ifmgd->rssi_max_thold &&
2452 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2453 ifmgd->last_ave_beacon_signal = sig;
2454 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2455 } else if (sig < ifmgd->rssi_min_thold &&
2456 (last_sig >= ifmgd->rssi_max_thold ||
2457 last_sig == 0)) {
2458 ifmgd->last_ave_beacon_signal = sig;
2459 drv_rssi_callback(local, RSSI_EVENT_LOW);
2460 }
2461 }
2462
17e4ec14 2463 if (bss_conf->cqm_rssi_thold &&
391a200a 2464 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2465 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2466 int sig = ifmgd->ave_beacon_signal / 16;
2467 int last_event = ifmgd->last_cqm_event_signal;
2468 int thold = bss_conf->cqm_rssi_thold;
2469 int hyst = bss_conf->cqm_rssi_hyst;
2470 if (sig < thold &&
2471 (last_event == 0 || sig < last_event - hyst)) {
2472 ifmgd->last_cqm_event_signal = sig;
2473 ieee80211_cqm_rssi_notify(
2474 &sdata->vif,
2475 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2476 GFP_KERNEL);
2477 } else if (sig > thold &&
2478 (last_event == 0 || sig > last_event + hyst)) {
2479 ifmgd->last_cqm_event_signal = sig;
2480 ieee80211_cqm_rssi_notify(
2481 &sdata->vif,
2482 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2483 GFP_KERNEL);
2484 }
2485 }
2486
b291ba11 2487 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 2488#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2489 if (net_ratelimit()) {
2490 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 2491 "to a received beacon\n", sdata->name);
92778180
JM		 2492 }
2493#endif
b291ba11 2494 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2495 mutex_lock(&local->iflist_mtx);
2496 ieee80211_recalc_ps(local, -1);
2497 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2498 }
2499
b291ba11
JB		 2500 /*
2501 * Push the beacon loss detection into the future since
2502 * we are processing a beacon from the AP just now.
2503 */
d3a910a8 2504 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2505
d91f36db
JB		 2506 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2507 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2508 len - baselen, &elems,
2509 care_about_ies, ncrc);
2510
2511 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2512 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2513 ifmgd->aid);
d91f36db 2514
d8ec4433 2515 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2516 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2517 true);
d91f36db 2518
4ced3f74 2519 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2520 elems.wmm_param_len);
2521 }
fe3fa827 2522
25c9c875 2523 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2524 if (directed_tim) {
572e0012
KV		 2525 if (local->hw.conf.dynamic_ps_timeout > 0) {
2526 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2527 ieee80211_hw_config(local,
2528 IEEE80211_CONF_CHANGE_PS);
2529 ieee80211_send_nullfunc(local, sdata, 0);
2530 } else {
2531 local->pspolling = true;
2532
2533 /*
2534 * Here is assumed that the driver will be
2535 * able to send ps-poll frame and receive a
2536 * response even though power save mode is
2537 * enabled, but some drivers might require
2538 * to disable power save here. This needs
2539 * to be investigated.
2540 */
2541 ieee80211_send_pspoll(local, sdata);
2542 }
a97b77b9
VN		 2543 }
2544 }
7a5158ef 2545
d8ec4433 2546 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2547 return;
2548 ifmgd->beacon_crc = ncrc;
d8ec4433 2549 ifmgd->beacon_crc_valid = true;
30196673 2550
7a5158ef
JB		 2551 if (elems.erp_info && elems.erp_info_len >= 1) {
2552 erp_valid = true;
2553 erp_value = elems.erp_info[0];
2554 } else {
2555 erp_valid = false;
50c4afb9 2556 }
7a5158ef
JB		 2557 changed |= ieee80211_handle_bss_capability(sdata,
2558 le16_to_cpu(mgmt->u.beacon.capab_info),
2559 erp_valid, erp_value);
f0706e82 2560
d3c990fb 2561
53d6f81c 2562 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 2563 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 2564 struct sta_info *sta;
2565 struct ieee80211_supported_band *sband;
2566 u16 ap_ht_cap_flags;
2567
2568 rcu_read_lock();
2569
abe60632 2570 sta = sta_info_get(sdata, bssid);
77fdaa12 2571 if (WARN_ON(!sta)) {
ae5eb026
JB		 2572 rcu_read_unlock();
2573 return;
2574 }
2575
2576 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2577
ef96a842 2578 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
ae5eb026
JB		 2579 elems.ht_cap_elem, &sta->sta.ht_cap);
2580
2581 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2582
2583 rcu_read_unlock();
2584
2585 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 2586 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 2587 }
2588
8b19e6ca 2589 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2590 if (elems.country_elem) {
a8302de9
VT		 2591 /* TODO: IBSS also needs this */
2592 if (elems.pwr_constr_elem)
2593 ieee80211_handle_pwr_constr(sdata,
2594 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2595 elems.pwr_constr_elem,
2596 elems.pwr_constr_elem_len);
3f2355cb
LR		 2597 }
2598
471b3efd 2599 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2600}
2601
1fa57d01
JB		 2602void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2603 struct sk_buff *skb)
f0706e82 2604{
77fdaa12 2605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2606 struct ieee80211_rx_status *rx_status;
f0706e82 2607 struct ieee80211_mgmt *mgmt;
66e67e41 2608 struct cfg80211_bss *bss = NULL;
77fdaa12 2609 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2610 u16 fc;
2611
f0706e82
JB		 2612 rx_status = (struct ieee80211_rx_status *) skb->cb;
2613 mgmt = (struct ieee80211_mgmt *) skb->data;
2614 fc = le16_to_cpu(mgmt->frame_control);
2615
77fdaa12
JB		 2616 mutex_lock(&ifmgd->mtx);
2617
66e67e41
JB		 2618 switch (fc & IEEE80211_FCTL_STYPE) {
2619 case IEEE80211_STYPE_BEACON:
2620 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2621 break;
2622 case IEEE80211_STYPE_PROBE_RESP:
2623 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2624 break;
2625 case IEEE80211_STYPE_AUTH:
2626 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2627 break;
2628 case IEEE80211_STYPE_DEAUTH:
2629 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2630 break;
2631 case IEEE80211_STYPE_DISASSOC:
2632 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2633 break;
2634 case IEEE80211_STYPE_ASSOC_RESP:
2635 case IEEE80211_STYPE_REASSOC_RESP:
2636 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2637 break;
2638 case IEEE80211_STYPE_ACTION:
2639 switch (mgmt->u.action.category) {
2640 case WLAN_CATEGORY_SPECTRUM_MGMT:
2641 ieee80211_sta_process_chanswitch(sdata,
2642 &mgmt->u.action.u.chan_switch.sw_elem,
2643 (void *)ifmgd->associated->priv,
2644 rx_status->mactime);
77fdaa12 2645 break;
77fdaa12 2646 }
77fdaa12 2647 }
77fdaa12
JB		 2648 mutex_unlock(&ifmgd->mtx);
2649
66e67e41
JB		 2650 switch (rma) {
2651 case RX_MGMT_NONE:
2652 /* no action */
2653 break;
2654 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2655 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2656 break;
2657 case RX_MGMT_CFG80211_DISASSOC:
2658 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2659 break;
2660 case RX_MGMT_CFG80211_RX_AUTH:
2661 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2662 break;
2663 case RX_MGMT_CFG80211_RX_ASSOC:
2664 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2665 break;
2666 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2667 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2668 break;
2669 default:
2670 WARN(1, "unexpected: %d", rma);
b054b747 2671 }
f0706e82
JB		 2672}
2673
9c6bd790 2674static void ieee80211_sta_timer(unsigned long data)
f0706e82 2675{
60f8b39c
JB		 2676 struct ieee80211_sub_if_data *sdata =
2677 (struct ieee80211_sub_if_data *) data;
46900298 2678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2679 struct ieee80211_local *local = sdata->local;
f0706e82 2680
5bb644a0
JB		 2681 if (local->quiescing) {
2682 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2683 return;
2684 }
2685
64592c8f 2686 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2687}
2688
04ac3c0e 2689static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2690 u8 *bssid, u8 reason)
04ac3c0e
FF		 2691{
2692 struct ieee80211_local *local = sdata->local;
2693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2694 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2695
2696 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2697 IEEE80211_STA_BEACON_POLL);
2698
37ad3888
JB		 2699 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2700 false, frame_buf);
04ac3c0e 2701 mutex_unlock(&ifmgd->mtx);
37ad3888 2702
04ac3c0e
FF		 2703 /*
2704 * must be outside lock due to cfg80211,
2705 * but that's not a problem.
2706 */
5fef7dbc 2707 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2708
2709 mutex_lock(&local->mtx);
2710 ieee80211_recalc_idle(local);
2711 mutex_unlock(&local->mtx);
2712
04ac3c0e
FF		 2713 mutex_lock(&ifmgd->mtx);
2714}
2715
66e67e41
JB		 2716static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2717{
2718 struct ieee80211_local *local = sdata->local;
2719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2720 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2721
2722 lockdep_assert_held(&ifmgd->mtx);
2723
2724 if (WARN_ON_ONCE(!auth_data))
2725 return -EINVAL;
2726
66e67e41
JB		 2727 auth_data->tries++;
2728
2729 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2730 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2731 sdata->name, auth_data->bss->bssid);
2732
2733 /*
2734 * Most likely AP is not in the range so remove the
2735 * bss struct for that AP.
2736 */
2737 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2738
2739 return -ETIMEDOUT;
2740 }
2741
2742 if (auth_data->bss->proberesp_ies) {
2743 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2744 sdata->name, auth_data->bss->bssid, auth_data->tries,
2745 IEEE80211_AUTH_MAX_TRIES);
2746
2747 auth_data->expected_transaction = 2;
2748 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2749 auth_data->ie, auth_data->ie_len,
2750 auth_data->bss->bssid,
2751 auth_data->bss->bssid, NULL, 0, 0);
2752 } else {
2753 const u8 *ssidie;
2754
2755 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2756 sdata->name, auth_data->bss->bssid, auth_data->tries,
2757 IEEE80211_AUTH_MAX_TRIES);
2758
2759 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2760 if (!ssidie)
2761 return -EINVAL;
2762 /*
2763 * Direct probe is sent to broadcast address as some APs
2764 * will not answer to direct packet in unassociated state.
2765 */
2766 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2767 NULL, 0, (u32) -1, true, false);
2768 }
2769
2770 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2771 run_again(ifmgd, auth_data->timeout);
2772
2773 return 0;
2774}
2775
2776static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2777{
2778 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2779 struct ieee80211_local *local = sdata->local;
2780
2781 lockdep_assert_held(&sdata->u.mgd.mtx);
2782
66e67e41
JB		 2783 assoc_data->tries++;
2784 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2785 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2786 sdata->name, assoc_data->bss->bssid);
2787
2788 /*
2789 * Most likely AP is not in the range so remove the
2790 * bss struct for that AP.
2791 */
2792 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2793
2794 return -ETIMEDOUT;
2795 }
2796
2797 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2798 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2799 IEEE80211_ASSOC_MAX_TRIES);
2800 ieee80211_send_assoc(sdata);
2801
2802 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2803 run_again(&sdata->u.mgd, assoc_data->timeout);
2804
2805 return 0;
2806}
2807
1fa57d01 2808void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2809{
9c6bd790 2810 struct ieee80211_local *local = sdata->local;
1fa57d01 2811 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2812
77fdaa12
JB		 2813 mutex_lock(&ifmgd->mtx);
2814
66e67e41
JB		 2815 if (ifmgd->auth_data &&
2816 time_after(jiffies, ifmgd->auth_data->timeout)) {
2817 if (ifmgd->auth_data->done) {
2818 /*
2819 * ok ... we waited for assoc but userspace didn't,
2820 * so let's just kill the auth data
2821 */
2822 ieee80211_destroy_auth_data(sdata, false);
2823 } else if (ieee80211_probe_auth(sdata)) {
2824 u8 bssid[ETH_ALEN];
2825
2826 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2827
2828 ieee80211_destroy_auth_data(sdata, false);
2829
2830 mutex_unlock(&ifmgd->mtx);
2831 cfg80211_send_auth_timeout(sdata->dev, bssid);
2832 mutex_lock(&ifmgd->mtx);
2833 }
2834 } else if (ifmgd->auth_data)
2835 run_again(ifmgd, ifmgd->auth_data->timeout);
2836
2837 if (ifmgd->assoc_data &&
2838 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2839 if (!ifmgd->assoc_data->have_beacon ||
2840 ieee80211_do_assoc(sdata)) {
2841 u8 bssid[ETH_ALEN];
2842
2843 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2844
2845 ieee80211_destroy_assoc_data(sdata, false);
2846
2847 mutex_unlock(&ifmgd->mtx);
2848 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2849 mutex_lock(&ifmgd->mtx);
2850 }
2851 } else if (ifmgd->assoc_data)
2852 run_again(ifmgd, ifmgd->assoc_data->timeout);
2853
b291ba11
JB		 2854 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2855 IEEE80211_STA_CONNECTION_POLL) &&
2856 ifmgd->associated) {
a43abf29 2857 u8 bssid[ETH_ALEN];
72a8a3ed 2858 int max_tries;
a43abf29 2859
0c1ad2ca 2860 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2861
72a8a3ed 2862 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2863 max_tries = max_nullfunc_tries;
72a8a3ed 2864 else
180205bd 2865 max_tries = max_probe_tries;
72a8a3ed 2866
4e5ff376
FF		 2867 /* ACK received for nullfunc probing frame */
2868 if (!ifmgd->probe_send_count)
2869 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2870 else if (ifmgd->nullfunc_failed) {
2871 if (ifmgd->probe_send_count < max_tries) {
2872#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2873 wiphy_debug(local->hw.wiphy,
2874 "%s: No ack for nullfunc frame to"
bfc31df3 2875 " AP %pM, try %d/%i\n",
04ac3c0e 2876 sdata->name, bssid,
bfc31df3 2877 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2878#endif
2879 ieee80211_mgd_probe_ap_send(sdata);
2880 } else {
2881#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2882 wiphy_debug(local->hw.wiphy,
2883 "%s: No ack for nullfunc frame to"
2884 " AP %pM, disconnecting.\n",
c658e5db 2885 sdata->name, bssid);
04ac3c0e 2886#endif
95acac61
JB		 2887 ieee80211_sta_connection_lost(sdata, bssid,
2888 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2889 }
2890 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2891 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2892 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2893#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2894 wiphy_debug(local->hw.wiphy,
2895 "%s: Failed to send nullfunc to AP %pM"
2896 " after %dms, disconnecting.\n",
2897 sdata->name,
180205bd 2898 bssid, probe_wait_ms);
04ac3c0e 2899#endif
95acac61
JB		 2900 ieee80211_sta_connection_lost(sdata, bssid,
2901 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2902 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2903#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2904 wiphy_debug(local->hw.wiphy,
2905 "%s: No probe response from AP %pM"
bfc31df3 2906 " after %dms, try %d/%i\n",
b38afa87 2907 sdata->name,
180205bd 2908 bssid, probe_wait_ms,
bfc31df3 2909 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2910#endif
2911 ieee80211_mgd_probe_ap_send(sdata);
2912 } else {
b291ba11
JB		 2913 /*
2914 * We actually lost the connection ... or did we?
2915 * Let's make sure!
2916 */
b38afa87
BG		 2917 wiphy_debug(local->hw.wiphy,
2918 "%s: No probe response from AP %pM"
2919 " after %dms, disconnecting.\n",
2920 sdata->name,
180205bd 2921 bssid, probe_wait_ms);
04ac3c0e 2922
95acac61
JB		 2923 ieee80211_sta_connection_lost(sdata, bssid,
2924 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2925 }
2926 }
2927
77fdaa12 2928 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2929
2930 mutex_lock(&local->mtx);
2931 ieee80211_recalc_idle(local);
2932 mutex_unlock(&local->mtx);
f0706e82
JB		 2933}
2934
b291ba11
JB		 2935static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2936{
2937 struct ieee80211_sub_if_data *sdata =
2938 (struct ieee80211_sub_if_data *) data;
2939 struct ieee80211_local *local = sdata->local;
2940
2941 if (local->quiescing)
2942 return;
2943
1e4dcd01
JO		 2944 ieee80211_queue_work(&sdata->local->hw,
2945 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2946}
2947
2948static void ieee80211_sta_conn_mon_timer(unsigned long data)
2949{
2950 struct ieee80211_sub_if_data *sdata =
2951 (struct ieee80211_sub_if_data *) data;
2952 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2953 struct ieee80211_local *local = sdata->local;
2954
2955 if (local->quiescing)
2956 return;
2957
42935eca 2958 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2959}
2960
2961static void ieee80211_sta_monitor_work(struct work_struct *work)
2962{
2963 struct ieee80211_sub_if_data *sdata =
2964 container_of(work, struct ieee80211_sub_if_data,
2965 u.mgd.monitor_work);
2966
2967 ieee80211_mgd_probe_ap(sdata, false);
2968}
2969
9c6bd790
JB		 2970static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2971{
494f1fe5
EP		 2972 u32 flags;
2973
ad935687 2974 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2975 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2976 IEEE80211_STA_CONNECTION_POLL);
ad935687 2977
b291ba11 2978 /* let's probe the connection once */
494f1fe5
EP		 2979 flags = sdata->local->hw.flags;
2980 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2981 ieee80211_queue_work(&sdata->local->hw,
2982 &sdata->u.mgd.monitor_work);
b291ba11 2983 /* and do all the other regular work too */
64592c8f 2984 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2985 }
9c6bd790 2986}
f0706e82 2987
5bb644a0
JB		 2988#ifdef CONFIG_PM
2989void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2990{
2991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2992
2993 /*
2994 * we need to use atomic bitops for the running bits
2995 * only because both timers might fire at the same
2996 * time -- the code here is properly synchronised.
2997 */
2998
d1f5b7a3
JB		 2999 cancel_work_sync(&ifmgd->request_smps_work);
3000
0ecfe806 3001 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3002 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 3003 if (del_timer_sync(&ifmgd->timer))
3004 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3005
3006 cancel_work_sync(&ifmgd->chswitch_work);
3007 if (del_timer_sync(&ifmgd->chswitch_timer))
3008 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3009
b291ba11
JB		 3010 /* these will just be re-established on connection */
3011 del_timer_sync(&ifmgd->conn_mon_timer);
3012 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3013}
3014
3015void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3016{
3017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3018
676b58c2
RM		 3019 if (!ifmgd->associated)
3020 return;
3021
95acac61
JB		 3022 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3023 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3024 mutex_lock(&ifmgd->mtx);
3025 if (ifmgd->associated) {
3026#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
3027 wiphy_debug(sdata->local->hw.wiphy,
3028 "%s: driver requested disconnect after resume.\n",
3029 sdata->name);
3030#endif
3031 ieee80211_sta_connection_lost(sdata,
3032 ifmgd->associated->bssid,
3033 WLAN_REASON_UNSPECIFIED);
3034 mutex_unlock(&ifmgd->mtx);
3035 return;
3036 }
3037 mutex_unlock(&ifmgd->mtx);
3038 }
3039
5bb644a0
JB		 3040 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3041 add_timer(&ifmgd->timer);
3042 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3043 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3044 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 3045 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 3046}
3047#endif
3048
9c6bd790
JB		 3049/* interface setup */
3050void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3051{
46900298 3052 struct ieee80211_if_managed *ifmgd;
988c0f72 3053
46900298 3054 ifmgd = &sdata->u.mgd;
b291ba11 3055 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3056 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3057 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3058 ieee80211_beacon_connection_loss_work);
d1f5b7a3 3059 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3060 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3061 (unsigned long) sdata);
b291ba11
JB		 3062 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3063 (unsigned long) sdata);
3064 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3065 (unsigned long) sdata);
46900298 3066 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3067 (unsigned long) sdata);
9c6bd790 3068
ab1faead 3069 ifmgd->flags = 0;
1478acb3 3070 ifmgd->powersave = sdata->wdev.ps;
bbbdff9e 3071
77fdaa12 3072 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3073
3074 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3075 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3076 else
3077 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3078}
3079
77fdaa12
JB		 3080/* scan finished notification */
3081void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3082{
77fdaa12 3083 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 3084
77fdaa12
JB		 3085 /* Restart STA timers */
3086 rcu_read_lock();
3087 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3088 ieee80211_restart_sta_timer(sdata);
3089 rcu_read_unlock();
3090}
60f8b39c 3091
77fdaa12
JB		 3092int ieee80211_max_network_latency(struct notifier_block *nb,
3093 unsigned long data, void *dummy)
3094{
3095 s32 latency_usec = (s32) data;
3096 struct ieee80211_local *local =
3097 container_of(nb, struct ieee80211_local,
3098 network_latency_notifier);
1fa6f4af 3099
77fdaa12
JB		 3100 mutex_lock(&local->iflist_mtx);
3101 ieee80211_recalc_ps(local, latency_usec);
3102 mutex_unlock(&local->iflist_mtx);
dfe67012 3103
77fdaa12 3104 return 0;
9c6bd790
JB		 3105}
3106
77fdaa12
JB		 3107/* config hooks */
3108int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3109 struct cfg80211_auth_request *req)
9c6bd790 3110{
66e67e41
JB		 3111 struct ieee80211_local *local = sdata->local;
3112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3113 struct ieee80211_mgd_auth_data *auth_data;
3114 struct sta_info *sta;
77fdaa12 3115 u16 auth_alg;
66e67e41
JB		 3116 int err;
3117
3118 /* prepare auth data structure */
9c6bd790 3119
77fdaa12
JB		 3120 switch (req->auth_type) {
3121 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3122 auth_alg = WLAN_AUTH_OPEN;
3123 break;
3124 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3125 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3126 return -EOPNOTSUPP;
77fdaa12
JB		 3127 auth_alg = WLAN_AUTH_SHARED_KEY;
3128 break;
3129 case NL80211_AUTHTYPE_FT:
3130 auth_alg = WLAN_AUTH_FT;
3131 break;
3132 case NL80211_AUTHTYPE_NETWORK_EAP:
3133 auth_alg = WLAN_AUTH_LEAP;
3134 break;
3135 default:
3136 return -EOPNOTSUPP;
60f8b39c 3137 }
77fdaa12 3138
66e67e41
JB		 3139 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3140 if (!auth_data)
9c6bd790 3141 return -ENOMEM;
77fdaa12 3142
66e67e41 3143 auth_data->bss = req->bss;
77fdaa12
JB		 3144
3145 if (req->ie && req->ie_len) {
66e67e41
JB		 3146 memcpy(auth_data->ie, req->ie, req->ie_len);
3147 auth_data->ie_len = req->ie_len;
9c6bd790 3148 }
77fdaa12 3149
fffd0934 3150 if (req->key && req->key_len) {
66e67e41
JB		 3151 auth_data->key_len = req->key_len;
3152 auth_data->key_idx = req->key_idx;
3153 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3154 }
3155
66e67e41 3156 auth_data->algorithm = auth_alg;
60f8b39c 3157
66e67e41 3158 /* try to authenticate/probe */
2a33bee2 3159
66e67e41 3160 mutex_lock(&ifmgd->mtx);
2a33bee2 3161
66e67e41
JB		 3162 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3163 ifmgd->assoc_data) {
3164 err = -EBUSY;
3165 goto err_free;
2a33bee2
GE		 3166 }
3167
66e67e41
JB		 3168 if (ifmgd->auth_data)
3169 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3170
66e67e41
JB		 3171 /* prep auth_data so we don't go into idle on disassoc */
3172 ifmgd->auth_data = auth_data;
af6b6374 3173
66e67e41 3174 if (ifmgd->associated)
37ad3888 3175 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3176
66e67e41
JB		 3177 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3178 sdata->name, req->bss->bssid);
e5b900d2 3179
66e67e41
JB		 3180 mutex_lock(&local->mtx);
3181 ieee80211_recalc_idle(sdata->local);
3182 mutex_unlock(&local->mtx);
e5b900d2 3183
66e67e41
JB		 3184 /* switch to the right channel */
3185 local->oper_channel = req->bss->channel;
3186 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
af6b6374 3187
66e67e41
JB		 3188 /* set BSSID */
3189 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3190 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
b2abb6e2 3191
66e67e41
JB		 3192 /* add station entry */
3193 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3194 if (!sta) {
3195 err = -ENOMEM;
3196 goto err_clear;
3197 }
68542962 3198
66e67e41
JB		 3199 err = sta_info_insert(sta);
3200 if (err) {
3201 printk(KERN_DEBUG
3202 "%s: failed to insert STA entry for the AP %pM (error %d)\n",
3203 sdata->name, req->bss->bssid, err);
3204 goto err_clear;
af6b6374
JB		 3205 }
3206
66e67e41
JB		 3207 err = ieee80211_probe_auth(sdata);
3208 if (err) {
66e67e41
JB		 3209 sta_info_destroy_addr(sdata, req->bss->bssid);
3210 goto err_clear;
3211 }
3212
3213 /* hold our own reference */
3214 cfg80211_ref_bss(auth_data->bss);
3215 err = 0;
3216 goto out_unlock;
3217
3218 err_clear:
3219 ifmgd->auth_data = NULL;
3220 err_free:
3221 kfree(auth_data);
3222 out_unlock:
3223 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3224
66e67e41 3225 return err;
af6b6374
JB		 3226}
3227
77fdaa12
JB		 3228int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3229 struct cfg80211_assoc_request *req)
f0706e82 3230{
66e67e41 3231 struct ieee80211_local *local = sdata->local;
77fdaa12 3232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3233 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41
JB		 3234 struct ieee80211_mgd_assoc_data *assoc_data;
3235 struct sta_info *sta;
3236 const u8 *ssidie;
2a33bee2 3237 int i, err;
f0706e82 3238
66e67e41
JB		 3239 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3240 if (!ssidie)
3241 return -EINVAL;
3242
3243 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3244 if (!assoc_data)
3245 return -ENOMEM;
3246
77fdaa12 3247 mutex_lock(&ifmgd->mtx);
9c87ba67 3248
66e67e41 3249 if (ifmgd->associated)
37ad3888 3250 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3251
3252 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3253 err = -EBUSY;
3254 goto err_free;
af6b6374 3255 }
77fdaa12 3256
66e67e41
JB		 3257 if (ifmgd->assoc_data) {
3258 err = -EBUSY;
3259 goto err_free;
3260 }
77fdaa12 3261
66e67e41
JB		 3262 if (ifmgd->auth_data) {
3263 bool match;
3264
3265 /* keep sta info, bssid if matching */
888d04df 3266 match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
66e67e41 3267 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3268 }
3269
66e67e41
JB		 3270 /* prepare assoc data */
3271
77fdaa12 3272 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3273 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3274
d8ec4433
JO		 3275 ifmgd->beacon_crc_valid = false;
3276
de5036aa
JB		 3277 /*
3278 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3279 * We still associate in non-HT mode (11a/b/g) if any one of these
3280 * ciphers is configured as pairwise.
3281 * We can set this to true for non-11n hardware, that'll be checked
3282 * separately along with the peer capabilities.
3283 */
77fdaa12
JB		 3284 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3285 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3286 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3287 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3288 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3289
ef96a842
BG		 3290 if (req->flags & ASSOC_REQ_DISABLE_HT)
3291 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3292
3293 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3294 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3295 sizeof(ifmgd->ht_capa_mask));
3296
77fdaa12 3297 if (req->ie && req->ie_len) {
66e67e41
JB		 3298 memcpy(assoc_data->ie, req->ie, req->ie_len);
3299 assoc_data->ie_len = req->ie_len;
3300 }
f679f65d 3301
66e67e41 3302 assoc_data->bss = req->bss;
f679f65d 3303
af6b6374
JB		 3304 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3305 if (ifmgd->powersave)
3306 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3307 else
3308 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3309 } else
3310 ifmgd->ap_smps = ifmgd->req_smps;
3311
66e67e41
JB		 3312 assoc_data->capability = req->bss->capability;
3313 assoc_data->wmm_used = bss->wmm_used;
3314 assoc_data->supp_rates = bss->supp_rates;
3315 assoc_data->supp_rates_len = bss->supp_rates_len;
3316 assoc_data->ht_information_ie =
f679f65d 3317 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 3318
ab13315a
KV		 3319 if (bss->wmm_used && bss->uapsd_supported &&
3320 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
66e67e41 3321 assoc_data->uapsd_used = true;
ab13315a
KV		 3322 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3323 } else {
66e67e41 3324 assoc_data->uapsd_used = false;
ab13315a
KV		 3325 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3326 }
3327
66e67e41
JB		 3328 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3329 assoc_data->ssid_len = ssidie[1];
63f170e0 3330
77fdaa12 3331 if (req->prev_bssid)
66e67e41 3332 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3333
3334 if (req->use_mfp) {
3335 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3336 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3337 } else {
3338 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3339 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3340 }
3341
3342 if (req->crypto.control_port)
3343 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3344 else
3345 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3346
a621fa4d
JB		 3347 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3348 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3349
66e67e41
JB		 3350 /* kick off associate process */
3351
3352 ifmgd->assoc_data = assoc_data;
3353
3354 mutex_lock(&local->mtx);
3355 ieee80211_recalc_idle(sdata->local);
3356 mutex_unlock(&local->mtx);
3357
3358 /* switch to the right channel */
3359 local->oper_channel = req->bss->channel;
3360 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3361
3362 rcu_read_lock();
3363 sta = sta_info_get(sdata, req->bss->bssid);
3364 rcu_read_unlock();
3365
3366 if (!sta) {
3367 /* set BSSID */
3368 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3369 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3370
3371 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3372 if (!sta) {
3373 err = -ENOMEM;
3374 goto err_clear;
3375 }
3376
3377 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3378
3379 err = sta_info_insert(sta);
3380 sta = NULL;
3381 if (err) {
3382 printk(KERN_DEBUG
3383 "%s: failed to insert STA entry for the AP (error %d)\n",
3384 sdata->name, err);
3385 goto err_clear;
3386 }
3387 } else
888d04df 3388 WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, req->bss->bssid));
66e67e41
JB		 3389
3390 if (!bss->dtim_period &&
3391 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3392 /*
3393 * Wait up to one beacon interval ...
3394 * should this be more if we miss one?
3395 */
3396 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3397 sdata->name, ifmgd->bssid);
3398 assoc_data->timeout = jiffies +
3399 TU_TO_EXP_TIME(req->bss->beacon_interval);
3400 } else {
3401 assoc_data->have_beacon = true;
3402 assoc_data->sent_assoc = false;
3403 assoc_data->timeout = jiffies;
3404 }
3405 run_again(ifmgd, assoc_data->timeout);
3406
fcff4f10
PS		 3407 if (bss->corrupt_data) {
3408 char *corrupt_type = "data";
3409 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3410 if (bss->corrupt_data &
3411 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3412 corrupt_type = "beacon and probe response";
3413 else
3414 corrupt_type = "beacon";
3415 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3416 corrupt_type = "probe response";
3417 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3418 sdata->name, corrupt_type);
3419 }
3420
66e67e41
JB		 3421 err = 0;
3422 goto out;
3423 err_clear:
3424 ifmgd->assoc_data = NULL;
3425 err_free:
3426 kfree(assoc_data);
3427 out:
3428 mutex_unlock(&ifmgd->mtx);
3429
3430 return err;
f0706e82
JB		 3431}
3432
77fdaa12 3433int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3434 struct cfg80211_deauth_request *req)
f0706e82 3435{
46900298 3436 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3437 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3438
77fdaa12
JB		 3439 mutex_lock(&ifmgd->mtx);
3440
37ad3888 3441 if (ifmgd->auth_data) {
66e67e41 3442 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3443 mutex_unlock(&ifmgd->mtx);
66e67e41 3444 return 0;
af6b6374 3445 }
77fdaa12 3446
37ad3888
JB		 3447 printk(KERN_DEBUG
3448 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3449 sdata->name, req->bssid, req->reason_code);
0ff71613 3450
37ad3888 3451 if (ifmgd->associated &&
888d04df 3452 compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
37ad3888 3453 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3454 req->reason_code, true, frame_buf);
37ad3888
JB		 3455 else
3456 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3457 IEEE80211_STYPE_DEAUTH,
3458 req->reason_code, true,
3459 frame_buf);
3460 mutex_unlock(&ifmgd->mtx);
3461
5fef7dbc 3462 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3463
7da7cc1d 3464 mutex_lock(&sdata->local->mtx);
bc83b681 3465 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3466 mutex_unlock(&sdata->local->mtx);
bc83b681 3467
f0706e82
JB		 3468 return 0;
3469}
84363e6e 3470
77fdaa12 3471int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3472 struct cfg80211_disassoc_request *req)
9c6bd790 3473{
77fdaa12 3474 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3475 u8 bssid[ETH_ALEN];
5fef7dbc 3476 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3477
77fdaa12 3478 mutex_lock(&ifmgd->mtx);
10f644a4 3479
8d8b261a
JB		 3480 /*
3481 * cfg80211 should catch this ... but it's racy since
3482 * we can receive a disassoc frame, process it, hand it
3483 * to cfg80211 while that's in a locked section already
3484 * trying to tell us that the user wants to disconnect.
3485 */
0c1ad2ca 3486 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3487 mutex_unlock(&ifmgd->mtx);
3488 return -ENOLINK;
3489 }
3490
0ff71613 3491 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3492 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3493
e69e95db 3494 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3495 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3496 req->reason_code, !req->local_state_change,
3497 frame_buf);
77fdaa12 3498 mutex_unlock(&ifmgd->mtx);
10f644a4 3499
5fef7dbc 3500 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3501
7da7cc1d 3502 mutex_lock(&sdata->local->mtx);
bc83b681 3503 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3504 mutex_unlock(&sdata->local->mtx);
bc83b681 3505
10f644a4
JB		 3506 return 0;
3507}
026331c4 3508
54e4ffb2
JB		 3509void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3510{
3511 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3512
3513 mutex_lock(&ifmgd->mtx);
3514 if (ifmgd->assoc_data)
3515 ieee80211_destroy_assoc_data(sdata, false);
3516 if (ifmgd->auth_data)
3517 ieee80211_destroy_auth_data(sdata, false);
3518 del_timer_sync(&ifmgd->timer);
3519 mutex_unlock(&ifmgd->mtx);
3520}
3521
a97c13c3
JO		 3522void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3523 enum nl80211_cqm_rssi_threshold_event rssi_event,
3524 gfp_t gfp)
3525{
3526 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3527
b5878a2d
JB		 3528 trace_api_cqm_rssi_notify(sdata, rssi_event);
3529
a97c13c3
JO		 3530 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3531}
3532EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3533
3534unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3535{
3536 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3537 return sdata->dev->operstate;
3538}
3539EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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