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mac80211: simplify HT checks
[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];
0aaffa9b
JB		 195 prev_chantype = sdata->vif.bss_conf.channel_type;
196
d5522e03 197
4e74bfdb
JB		 198 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
199 sband->band);
200 /* check that channel matches the right operating channel */
201 if (local->hw.conf.channel->center_freq != hti_cfreq) {
202 /* Some APs mess this up, evidently.
203 * Netgear WNDR3700 sometimes reports 4 higher than
204 * the actual channel, for instance.
205 */
206 printk(KERN_DEBUG
207 "%s: Wrong control channel in association"
208 " response: configured center-freq: %d"
209 " hti-cfreq: %d hti->control_chan: %d"
210 " band: %d. Disabling HT.\n",
211 sdata->name,
212 local->hw.conf.channel->center_freq,
213 hti_cfreq, hti->control_chan,
214 sband->band);
215 enable_ht = false;
172710bf 216 }
d5522e03
JB		 217
218 if (enable_ht) {
219 channel_type = NL80211_CHAN_HT20;
220
221 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
ef96a842 222 !ieee80111_cfg_override_disables_ht40(sdata) &&
d5522e03
JB		 223 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
224 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
225 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
226 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 227 if (!(local->hw.conf.channel->flags &
228 IEEE80211_CHAN_NO_HT40PLUS))
229 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 230 break;
231 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 232 if (!(local->hw.conf.channel->flags &
233 IEEE80211_CHAN_NO_HT40MINUS))
234 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 235 break;
236 }
237 }
238 }
239
fe6f212c
RC		 240 if (local->tmp_channel)
241 local->tmp_channel_type = channel_type;
d5522e03 242
0aaffa9b
JB		 243 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
244 /* can only fail due to HT40+/- mismatch */
245 channel_type = NL80211_CHAN_HT20;
246 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
247 }
d5522e03 248
7cc44ed4
RM		 249 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
250 /*
251 * Whenever the AP announces the HT mode change that can be
252 * 40MHz intolerant or etc., it would be safer to stop tx
253 * queues before doing hw config to avoid buffer overflow.
254 */
255 ieee80211_stop_queues_by_reason(&sdata->local->hw,
256 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
257
258 /* flush out all packets */
259 synchronize_net();
260
261 drv_flush(local, false);
262 }
263
0aaffa9b
JB		 264 /* channel_type change automatically detected */
265 ieee80211_hw_config(local, 0);
d5522e03 266
0aaffa9b 267 if (prev_chantype != channel_type) {
d5522e03 268 rcu_read_lock();
abe60632 269 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 270 if (sta)
271 rate_control_rate_update(local, sband, sta,
4fa00437 272 IEEE80211_RC_HT_CHANGED,
0aaffa9b 273 channel_type);
d5522e03 274 rcu_read_unlock();
7cc44ed4
RM		 275
276 if (beacon_htcap_ie)
277 ieee80211_wake_queues_by_reason(&sdata->local->hw,
278 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 279 }
d5522e03 280
9ed6bcce 281 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 282
283 /* if bss configuration changed store the new one */
0aaffa9b
JB		 284 if (sdata->ht_opmode_valid != enable_ht ||
285 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
286 prev_chantype != channel_type) {
d5522e03 287 changed |= BSS_CHANGED_HT;
9ed6bcce 288 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 289 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 290 }
291
292 return changed;
293}
294
9c6bd790
JB		 295/* frame sending functions */
296
66e67e41
JB		 297static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
298 struct ieee80211_supported_band *sband,
299 u32 *rates)
300{
301 int i, j, count;
302 *rates = 0;
303 count = 0;
304 for (i = 0; i < supp_rates_len; i++) {
305 int rate = (supp_rates[i] & 0x7F) * 5;
306
307 for (j = 0; j < sband->n_bitrates; j++)
308 if (sband->bitrates[j].bitrate == rate) {
309 *rates |= BIT(j);
310 count++;
311 break;
312 }
313 }
314
315 return count;
316}
317
318static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
319 struct sk_buff *skb, const u8 *ht_info_ie,
320 struct ieee80211_supported_band *sband,
321 struct ieee80211_channel *channel,
322 enum ieee80211_smps_mode smps)
323{
324 struct ieee80211_ht_info *ht_info;
325 u8 *pos;
326 u32 flags = channel->flags;
327 u16 cap;
328 struct ieee80211_sta_ht_cap ht_cap;
329
330 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
331
66e67e41
JB		 332 if (!ht_info_ie)
333 return;
334
335 if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info))
336 return;
337
338 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
339 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
340
341 ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2);
342
343 /* determine capability flags */
344 cap = ht_cap.cap;
345
346 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
347 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
348 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
349 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
350 cap &= ~IEEE80211_HT_CAP_SGI_40;
351 }
352 break;
353 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
354 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
355 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
356 cap &= ~IEEE80211_HT_CAP_SGI_40;
357 }
358 break;
359 }
360
361 /* set SM PS mode properly */
362 cap &= ~IEEE80211_HT_CAP_SM_PS;
363 switch (smps) {
364 case IEEE80211_SMPS_AUTOMATIC:
365 case IEEE80211_SMPS_NUM_MODES:
366 WARN_ON(1);
367 case IEEE80211_SMPS_OFF:
368 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
369 IEEE80211_HT_CAP_SM_PS_SHIFT;
370 break;
371 case IEEE80211_SMPS_STATIC:
372 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
373 IEEE80211_HT_CAP_SM_PS_SHIFT;
374 break;
375 case IEEE80211_SMPS_DYNAMIC:
376 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
377 IEEE80211_HT_CAP_SM_PS_SHIFT;
378 break;
379 }
380
381 /* reserve and fill IE */
382 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
383 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
384}
385
386static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
387{
388 struct ieee80211_local *local = sdata->local;
389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
390 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
391 struct sk_buff *skb;
392 struct ieee80211_mgmt *mgmt;
393 u8 *pos, qos_info;
394 size_t offset = 0, noffset;
395 int i, count, rates_len, supp_rates_len;
396 u16 capab;
397 struct ieee80211_supported_band *sband;
398 u32 rates = 0;
66e67e41
JB		 399
400 lockdep_assert_held(&ifmgd->mtx);
401
402 sband = local->hw.wiphy->bands[local->oper_channel->band];
403
404 if (assoc_data->supp_rates_len) {
405 /*
406 * Get all rates supported by the device and the AP as
407 * some APs don't like getting a superset of their rates
408 * in the association request (e.g. D-Link DAP 1353 in
409 * b-only mode)...
410 */
411 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
412 assoc_data->supp_rates_len,
413 sband, &rates);
414 } else {
415 /*
416 * In case AP not provide any supported rates information
417 * before association, we send information element(s) with
418 * all rates that we support.
419 */
420 rates = ~0;
421 rates_len = sband->n_bitrates;
422 }
423
424 skb = alloc_skb(local->hw.extra_tx_headroom +
425 sizeof(*mgmt) + /* bit too much but doesn't matter */
426 2 + assoc_data->ssid_len + /* SSID */
427 4 + rates_len + /* (extended) rates */
428 4 + /* power capability */
429 2 + 2 * sband->n_channels + /* supported channels */
430 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
431 assoc_data->ie_len + /* extra IEs */
432 9, /* WMM */
433 GFP_KERNEL);
434 if (!skb)
435 return;
436
437 skb_reserve(skb, local->hw.extra_tx_headroom);
438
439 capab = WLAN_CAPABILITY_ESS;
440
441 if (sband->band == IEEE80211_BAND_2GHZ) {
442 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
443 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
444 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
445 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
446 }
447
448 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
449 capab |= WLAN_CAPABILITY_PRIVACY;
450
451 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
452 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
453 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
454
455 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
456 memset(mgmt, 0, 24);
457 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
458 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
459 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
460
461 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
462 skb_put(skb, 10);
463 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
464 IEEE80211_STYPE_REASSOC_REQ);
465 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
466 mgmt->u.reassoc_req.listen_interval =
467 cpu_to_le16(local->hw.conf.listen_interval);
468 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
469 ETH_ALEN);
470 } else {
471 skb_put(skb, 4);
472 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
473 IEEE80211_STYPE_ASSOC_REQ);
474 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
475 mgmt->u.assoc_req.listen_interval =
476 cpu_to_le16(local->hw.conf.listen_interval);
477 }
478
479 /* SSID */
480 pos = skb_put(skb, 2 + assoc_data->ssid_len);
481 *pos++ = WLAN_EID_SSID;
482 *pos++ = assoc_data->ssid_len;
483 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
484
485 /* add all rates which were marked to be used above */
486 supp_rates_len = rates_len;
487 if (supp_rates_len > 8)
488 supp_rates_len = 8;
489
490 pos = skb_put(skb, supp_rates_len + 2);
491 *pos++ = WLAN_EID_SUPP_RATES;
492 *pos++ = supp_rates_len;
493
494 count = 0;
495 for (i = 0; i < sband->n_bitrates; i++) {
496 if (BIT(i) & rates) {
497 int rate = sband->bitrates[i].bitrate;
498 *pos++ = (u8) (rate / 5);
499 if (++count == 8)
500 break;
501 }
502 }
503
504 if (rates_len > count) {
505 pos = skb_put(skb, rates_len - count + 2);
506 *pos++ = WLAN_EID_EXT_SUPP_RATES;
507 *pos++ = rates_len - count;
508
509 for (i++; i < sband->n_bitrates; i++) {
510 if (BIT(i) & rates) {
511 int rate = sband->bitrates[i].bitrate;
512 *pos++ = (u8) (rate / 5);
513 }
514 }
515 }
516
517 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
518 /* 1. power capabilities */
519 pos = skb_put(skb, 4);
520 *pos++ = WLAN_EID_PWR_CAPABILITY;
521 *pos++ = 2;
522 *pos++ = 0; /* min tx power */
523 *pos++ = local->oper_channel->max_power; /* max tx power */
524
525 /* 2. supported channels */
526 /* TODO: get this in reg domain format */
527 pos = skb_put(skb, 2 * sband->n_channels + 2);
528 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
529 *pos++ = 2 * sband->n_channels;
530 for (i = 0; i < sband->n_channels; i++) {
531 *pos++ = ieee80211_frequency_to_channel(
532 sband->channels[i].center_freq);
533 *pos++ = 1; /* one channel in the subband*/
534 }
535 }
536
537 /* if present, add any custom IEs that go before HT */
538 if (assoc_data->ie_len && assoc_data->ie) {
539 static const u8 before_ht[] = {
540 WLAN_EID_SSID,
541 WLAN_EID_SUPP_RATES,
542 WLAN_EID_EXT_SUPP_RATES,
543 WLAN_EID_PWR_CAPABILITY,
544 WLAN_EID_SUPPORTED_CHANNELS,
545 WLAN_EID_RSN,
546 WLAN_EID_QOS_CAPA,
547 WLAN_EID_RRM_ENABLED_CAPABILITIES,
548 WLAN_EID_MOBILITY_DOMAIN,
549 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
550 };
551 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
552 before_ht, ARRAY_SIZE(before_ht),
553 offset);
554 pos = skb_put(skb, noffset - offset);
555 memcpy(pos, assoc_data->ie + offset, noffset - offset);
556 offset = noffset;
557 }
558
4e74bfdb 559 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
66e67e41
JB		 560 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_information_ie,
561 sband, local->oper_channel, ifmgd->ap_smps);
562
563 /* if present, add any custom non-vendor IEs that go after HT */
564 if (assoc_data->ie_len && assoc_data->ie) {
565 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
566 assoc_data->ie_len,
567 offset);
568 pos = skb_put(skb, noffset - offset);
569 memcpy(pos, assoc_data->ie + offset, noffset - offset);
570 offset = noffset;
571 }
572
573 if (assoc_data->wmm_used && local->hw.queues >= 4) {
574 if (assoc_data->uapsd_used) {
575 qos_info = local->uapsd_queues;
576 qos_info |= (local->uapsd_max_sp_len <<
577 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
578 } else {
579 qos_info = 0;
580 }
581
582 pos = skb_put(skb, 9);
583 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
584 *pos++ = 7; /* len */
585 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
586 *pos++ = 0x50;
587 *pos++ = 0xf2;
588 *pos++ = 2; /* WME */
589 *pos++ = 0; /* WME info */
590 *pos++ = 1; /* WME ver */
591 *pos++ = qos_info;
592 }
593
594 /* add any remaining custom (i.e. vendor specific here) IEs */
595 if (assoc_data->ie_len && assoc_data->ie) {
596 noffset = assoc_data->ie_len;
597 pos = skb_put(skb, noffset - offset);
598 memcpy(pos, assoc_data->ie + offset, noffset - offset);
599 }
600
601 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
602 ieee80211_tx_skb(sdata, skb);
603}
604
ef422bc0 605static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 606 const u8 *bssid, u16 stype,
5fef7dbc
JB		 607 u16 reason, bool send_frame,
608 u8 *frame_buf)
9ac19a90
JB		 609{
610 struct ieee80211_local *local = sdata->local;
46900298 611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 612 struct sk_buff *skb;
5fef7dbc 613 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 614
5fef7dbc
JB		 615 /* build frame */
616 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
617 mgmt->duration = 0; /* initialize only */
618 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 619 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 620 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 621 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 622 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 623 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
624
5fef7dbc
JB		 625 if (send_frame) {
626 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
627 DEAUTH_DISASSOC_LEN);
628 if (!skb)
629 return;
d5cdfacb 630
5fef7dbc
JB		 631 skb_reserve(skb, local->hw.extra_tx_headroom);
632
633 /* copy in frame */
634 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
635 mgmt, DEAUTH_DISASSOC_LEN);
636
637 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
638 IEEE80211_SKB_CB(skb)->flags |=
639 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 640 ieee80211_tx_skb(sdata, skb);
5fef7dbc 641 }
9ac19a90
JB		 642}
643
572e0012
KV		 644void ieee80211_send_pspoll(struct ieee80211_local *local,
645 struct ieee80211_sub_if_data *sdata)
646{
572e0012
KV		 647 struct ieee80211_pspoll *pspoll;
648 struct sk_buff *skb;
572e0012 649
d8cd189e
KV		 650 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
651 if (!skb)
572e0012 652 return;
572e0012 653
d8cd189e
KV		 654 pspoll = (struct ieee80211_pspoll *) skb->data;
655 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 656
62ae67be
JB		 657 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
658 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 659}
660
965bedad
JB		 661void ieee80211_send_nullfunc(struct ieee80211_local *local,
662 struct ieee80211_sub_if_data *sdata,
663 int powersave)
664{
665 struct sk_buff *skb;
d8cd189e 666 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 667 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 668
d8cd189e
KV		 669 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
670 if (!skb)
965bedad 671 return;
965bedad 672
d8cd189e 673 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 674 if (powersave)
d8cd189e 675 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 676
62ae67be 677 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 678 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
679 IEEE80211_STA_CONNECTION_POLL))
680 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
681
62ae67be 682 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 683}
684
d524215f
FF		 685static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
686 struct ieee80211_sub_if_data *sdata)
687{
688 struct sk_buff *skb;
689 struct ieee80211_hdr *nullfunc;
690 __le16 fc;
691
692 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
693 return;
694
695 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 696 if (!skb)
d524215f 697 return;
d15b8459 698
d524215f
FF		 699 skb_reserve(skb, local->hw.extra_tx_headroom);
700
701 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
702 memset(nullfunc, 0, 30);
703 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
704 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
705 nullfunc->frame_control = fc;
706 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
707 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
708 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
709 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
710
711 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
712 ieee80211_tx_skb(sdata, skb);
713}
714
cc32abd4
JB		 715/* spectrum management related things */
716static void ieee80211_chswitch_work(struct work_struct *work)
717{
718 struct ieee80211_sub_if_data *sdata =
719 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
721
9607e6b6 722 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 723 return;
724
77fdaa12
JB		 725 mutex_lock(&ifmgd->mtx);
726 if (!ifmgd->associated)
727 goto out;
cc32abd4
JB		 728
729 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 730 if (!sdata->local->ops->channel_switch) {
731 /* call "hw_config" only if doing sw channel switch */
732 ieee80211_hw_config(sdata->local,
733 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 734 } else {
735 /* update the device channel directly */
736 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 737 }
77fdaa12 738
cc32abd4 739 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 740 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 741
cc32abd4
JB		 742 ieee80211_wake_queues_by_reason(&sdata->local->hw,
743 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 744 out:
745 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
746 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 747}
748
5ce6e438
JB		 749void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
750{
751 struct ieee80211_sub_if_data *sdata;
752 struct ieee80211_if_managed *ifmgd;
753
754 sdata = vif_to_sdata(vif);
755 ifmgd = &sdata->u.mgd;
756
757 trace_api_chswitch_done(sdata, success);
758 if (!success) {
759 /*
760 * If the channel switch was not successful, stay
761 * around on the old channel. We currently lack
762 * good handling of this situation, possibly we
763 * should just drop the association.
764 */
765 sdata->local->csa_channel = sdata->local->oper_channel;
766 }
767
768 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
769}
770EXPORT_SYMBOL(ieee80211_chswitch_done);
771
cc32abd4
JB		 772static void ieee80211_chswitch_timer(unsigned long data)
773{
774 struct ieee80211_sub_if_data *sdata =
775 (struct ieee80211_sub_if_data *) data;
776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
777
5bb644a0
JB		 778 if (sdata->local->quiescing) {
779 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
780 return;
781 }
782
42935eca 783 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 784}
785
786void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
787 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 788 struct ieee80211_bss *bss,
789 u64 timestamp)
cc32abd4 790{
0c1ad2ca
JB		 791 struct cfg80211_bss *cbss =
792 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 793 struct ieee80211_channel *new_ch;
794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 795 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
796 cbss->channel->band);
cc32abd4 797
77fdaa12
JB		 798 ASSERT_MGD_MTX(ifmgd);
799
800 if (!ifmgd->associated)
cc32abd4
JB		 801 return;
802
fbe9c429 803 if (sdata->local->scanning)
cc32abd4
JB		 804 return;
805
806 /* Disregard subsequent beacons if we are already running a timer
807 processing a CSA */
808
809 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
810 return;
811
812 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
813 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
814 return;
815
816 sdata->local->csa_channel = new_ch;
817
5ce6e438
JB		 818 if (sdata->local->ops->channel_switch) {
819 /* use driver's channel switch callback */
820 struct ieee80211_channel_switch ch_switch;
821 memset(&ch_switch, 0, sizeof(ch_switch));
822 ch_switch.timestamp = timestamp;
823 if (sw_elem->mode) {
824 ch_switch.block_tx = true;
825 ieee80211_stop_queues_by_reason(&sdata->local->hw,
826 IEEE80211_QUEUE_STOP_REASON_CSA);
827 }
828 ch_switch.channel = new_ch;
829 ch_switch.count = sw_elem->count;
830 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
831 drv_channel_switch(sdata->local, &ch_switch);
832 return;
833 }
834
835 /* channel switch handled in software */
cc32abd4 836 if (sw_elem->count <= 1) {
42935eca 837 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 838 } else {
9feaddc7
WYG		 839 if (sw_elem->mode)
840 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 841 IEEE80211_QUEUE_STOP_REASON_CSA);
842 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
843 mod_timer(&ifmgd->chswitch_timer,
844 jiffies +
845 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 846 cbss->beacon_interval));
cc32abd4
JB		 847 }
848}
849
850static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
851 u16 capab_info, u8 *pwr_constr_elem,
852 u8 pwr_constr_elem_len)
853{
854 struct ieee80211_conf *conf = &sdata->local->hw.conf;
855
856 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
857 return;
858
859 /* Power constraint IE length should be 1 octet */
860 if (pwr_constr_elem_len != 1)
861 return;
862
a48b13ac 863 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 864 (*pwr_constr_elem != sdata->local->power_constr_level)) {
865 sdata->local->power_constr_level = *pwr_constr_elem;
866 ieee80211_hw_config(sdata->local, 0);
867 }
868}
869
f90754c1
JO		 870void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
871{
872 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
873 struct ieee80211_local *local = sdata->local;
874 struct ieee80211_conf *conf = &local->hw.conf;
875
876 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
877 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
878 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
879
880 local->disable_dynamic_ps = false;
881 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
882}
883EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
884
885void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
886{
887 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
888 struct ieee80211_local *local = sdata->local;
889 struct ieee80211_conf *conf = &local->hw.conf;
890
891 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
892 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
893 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
894
895 local->disable_dynamic_ps = true;
896 conf->dynamic_ps_timeout = 0;
897 del_timer_sync(&local->dynamic_ps_timer);
898 ieee80211_queue_work(&local->hw,
899 &local->dynamic_ps_enable_work);
900}
901EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
902
965bedad
JB		 903/* powersave */
904static void ieee80211_enable_ps(struct ieee80211_local *local,
905 struct ieee80211_sub_if_data *sdata)
906{
907 struct ieee80211_conf *conf = &local->hw.conf;
908
d5edaedc
JB		 909 /*
910 * If we are scanning right now then the parameters will
911 * take effect when scan finishes.
912 */
fbe9c429 913 if (local->scanning)
d5edaedc
JB		 914 return;
915
965bedad
JB		 916 if (conf->dynamic_ps_timeout > 0 &&
917 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
918 mod_timer(&local->dynamic_ps_timer, jiffies +
919 msecs_to_jiffies(conf->dynamic_ps_timeout));
920 } else {
921 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
922 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 923
2a13052f
JO		 924 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
925 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
926 return;
927
928 conf->flags |= IEEE80211_CONF_PS;
929 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 930 }
931}
932
933static void ieee80211_change_ps(struct ieee80211_local *local)
934{
935 struct ieee80211_conf *conf = &local->hw.conf;
936
937 if (local->ps_sdata) {
965bedad
JB		 938 ieee80211_enable_ps(local, local->ps_sdata);
939 } else if (conf->flags & IEEE80211_CONF_PS) {
940 conf->flags &= ~IEEE80211_CONF_PS;
941 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
942 del_timer_sync(&local->dynamic_ps_timer);
943 cancel_work_sync(&local->dynamic_ps_enable_work);
944 }
945}
946
808118cb
JY		 947static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
948{
949 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
950 struct sta_info *sta = NULL;
c2c98fde 951 bool authorized = false;
808118cb
JY		 952
953 if (!mgd->powersave)
954 return false;
955
05cb9108
JB		 956 if (mgd->broken_ap)
957 return false;
958
808118cb
JY		 959 if (!mgd->associated)
960 return false;
961
962 if (!mgd->associated->beacon_ies)
963 return false;
964
965 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
966 IEEE80211_STA_CONNECTION_POLL))
967 return false;
968
969 rcu_read_lock();
970 sta = sta_info_get(sdata, mgd->bssid);
971 if (sta)
c2c98fde 972 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 973 rcu_read_unlock();
974
c2c98fde 975 return authorized;
808118cb
JY		 976}
977
965bedad 978/* need to hold RTNL or interface lock */
10f644a4 979void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 980{
981 struct ieee80211_sub_if_data *sdata, *found = NULL;
982 int count = 0;
195e294d 983 int timeout;
965bedad
JB		 984
985 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
986 local->ps_sdata = NULL;
987 return;
988 }
989
af6b6374
JB		 990 if (!list_empty(&local->work_list)) {
991 local->ps_sdata = NULL;
992 goto change;
993 }
994
965bedad 995 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 996 if (!ieee80211_sdata_running(sdata))
965bedad 997 continue;
8c7914de
RM		 998 if (sdata->vif.type == NL80211_IFTYPE_AP) {
999 /* If an AP vif is found, then disable PS
1000 * by setting the count to zero thereby setting
1001 * ps_sdata to NULL.
1002 */
1003 count = 0;
1004 break;
1005 }
965bedad
JB		 1006 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1007 continue;
1008 found = sdata;
1009 count++;
1010 }
1011
808118cb 1012 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1013 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1014 s32 beaconint_us;
1015
1016 if (latency < 0)
ed77134b 1017 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1018
1019 beaconint_us = ieee80211_tu_to_usec(
1020 found->vif.bss_conf.beacon_int);
1021
ff616381 1022 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1023 if (timeout < 0) {
1024 /*
ff616381
JO		 1025 * Go to full PSM if the user configures a very low
1026 * latency requirement.
0ab82b04
EP		 1027 * The 2000 second value is there for compatibility
1028 * until the PM_QOS_NETWORK_LATENCY is configured
1029 * with real values.
195e294d 1030 */
0ab82b04
EP		 1031 if (latency > (1900 * USEC_PER_MSEC) &&
1032 latency != (2000 * USEC_PER_SEC))
195e294d 1033 timeout = 0;
ff616381
JO		 1034 else
1035 timeout = 100;
195e294d 1036 }
f90754c1
JO		 1037 local->dynamic_ps_user_timeout = timeout;
1038 if (!local->disable_dynamic_ps)
1039 conf->dynamic_ps_timeout =
1040 local->dynamic_ps_user_timeout;
195e294d 1041
04fe2037 1042 if (beaconint_us > latency) {
10f644a4 1043 local->ps_sdata = NULL;
04fe2037 1044 } else {
56007a02 1045 struct ieee80211_bss *bss;
04fe2037 1046 int maxslp = 1;
56007a02 1047 u8 dtimper;
04fe2037 1048
56007a02
JB		 1049 bss = (void *)found->u.mgd.associated->priv;
1050 dtimper = bss->dtim_period;
1051
1052 /* If the TIM IE is invalid, pretend the value is 1 */
1053 if (!dtimper)
1054 dtimper = 1;
1055 else if (dtimper > 1)
04fe2037
JB		 1056 maxslp = min_t(int, dtimper,
1057 latency / beaconint_us);
1058
9ccebe61 1059 local->hw.conf.max_sleep_period = maxslp;
56007a02 1060 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1061 local->ps_sdata = found;
04fe2037 1062 }
10f644a4 1063 } else {
965bedad 1064 local->ps_sdata = NULL;
10f644a4 1065 }
965bedad 1066
af6b6374 1067 change:
965bedad
JB		 1068 ieee80211_change_ps(local);
1069}
1070
1071void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1072{
1073 struct ieee80211_local *local =
1074 container_of(work, struct ieee80211_local,
1075 dynamic_ps_disable_work);
1076
1077 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1078 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1079 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1080 }
1081
1082 ieee80211_wake_queues_by_reason(&local->hw,
1083 IEEE80211_QUEUE_STOP_REASON_PS);
1084}
1085
1086void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1087{
1088 struct ieee80211_local *local =
1089 container_of(work, struct ieee80211_local,
1090 dynamic_ps_enable_work);
1091 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1092 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1093 unsigned long flags;
1094 int q;
965bedad
JB		 1095
1096 /* can only happen when PS was just disabled anyway */
1097 if (!sdata)
1098 return;
1099
5e34069c
CL		 1100 ifmgd = &sdata->u.mgd;
1101
965bedad
JB		 1102 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1103 return;
1104
77b7023a
AN		 1105 if (!local->disable_dynamic_ps &&
1106 local->hw.conf.dynamic_ps_timeout > 0) {
1107 /* don't enter PS if TX frames are pending */
1108 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1109 mod_timer(&local->dynamic_ps_timer, jiffies +
1110 msecs_to_jiffies(
1111 local->hw.conf.dynamic_ps_timeout));
1112 return;
1113 }
77b7023a
AN		 1114
1115 /*
1116 * transmission can be stopped by others which leads to
1117 * dynamic_ps_timer expiry. Postpone the ps timer if it
1118 * is not the actual idle state.
1119 */
1120 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1121 for (q = 0; q < local->hw.queues; q++) {
1122 if (local->queue_stop_reasons[q]) {
1123 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1124 flags);
1125 mod_timer(&local->dynamic_ps_timer, jiffies +
1126 msecs_to_jiffies(
1127 local->hw.conf.dynamic_ps_timeout));
1128 return;
1129 }
1130 }
1131 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1132 }
1ddc2867 1133
375177bf 1134 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1135 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1136 netif_tx_stop_all_queues(sdata->dev);
965bedad 1137
e8306f98
VN		 1138 if (drv_tx_frames_pending(local))
1139 mod_timer(&local->dynamic_ps_timer, jiffies +
1140 msecs_to_jiffies(
1141 local->hw.conf.dynamic_ps_timeout));
1142 else {
1143 ieee80211_send_nullfunc(local, sdata, 1);
1144 /* Flush to get the tx status of nullfunc frame */
1145 drv_flush(local, false);
1146 }
f3e85b9e
VN		 1147 }
1148
2a13052f
JO		 1149 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1150 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1151 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1152 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1153 local->hw.conf.flags |= IEEE80211_CONF_PS;
1154 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1155 }
f3e85b9e 1156
77b7023a
AN		 1157 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1158 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1159}
1160
1161void ieee80211_dynamic_ps_timer(unsigned long data)
1162{
1163 struct ieee80211_local *local = (void *) data;
1164
78f1a8b7 1165 if (local->quiescing || local->suspended)
5bb644a0
JB		 1166 return;
1167
42935eca 1168 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1169}
1170
60f8b39c 1171/* MLME */
f698d856 1172static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1173 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1174 u8 *wmm_param, size_t wmm_param_len)
1175{
f0706e82 1176 struct ieee80211_tx_queue_params params;
4ced3f74 1177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1178 size_t left;
1179 int count;
ab13315a 1180 u8 *pos, uapsd_queues = 0;
f0706e82 1181
e1b3ec1a
SG		 1182 if (!local->ops->conf_tx)
1183 return;
1184
af6b6374 1185 if (local->hw.queues < 4)
3434fbd3
JB		 1186 return;
1187
1188 if (!wmm_param)
1189 return;
1190
f0706e82
JB		 1191 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1192 return;
ab13315a
KV		 1193
1194 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 1195 uapsd_queues = local->uapsd_queues;
ab13315a 1196
f0706e82 1197 count = wmm_param[6] & 0x0f;
46900298 1198 if (count == ifmgd->wmm_last_param_set)
f0706e82 1199 return;
46900298 1200 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1201
1202 pos = wmm_param + 8;
1203 left = wmm_param_len - 8;
1204
1205 memset(&params, 0, sizeof(params));
1206
f0706e82
JB		 1207 local->wmm_acm = 0;
1208 for (; left >= 4; left -= 4, pos += 4) {
1209 int aci = (pos[0] >> 5) & 0x03;
1210 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1211 bool uapsd = false;
f0706e82
JB		 1212 int queue;
1213
1214 switch (aci) {
0eeb59fe 1215 case 1: /* AC_BK */
e100bb64 1216 queue = 3;
988c0f72 1217 if (acm)
0eeb59fe 1218 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1219 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1220 uapsd = true;
f0706e82 1221 break;
0eeb59fe 1222 case 2: /* AC_VI */
e100bb64 1223 queue = 1;
988c0f72 1224 if (acm)
0eeb59fe 1225 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1226 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1227 uapsd = true;
f0706e82 1228 break;
0eeb59fe 1229 case 3: /* AC_VO */
e100bb64 1230 queue = 0;
988c0f72 1231 if (acm)
0eeb59fe 1232 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1233 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1234 uapsd = true;
f0706e82 1235 break;
0eeb59fe 1236 case 0: /* AC_BE */
f0706e82 1237 default:
e100bb64 1238 queue = 2;
988c0f72 1239 if (acm)
0eeb59fe 1240 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1241 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1242 uapsd = true;
f0706e82
JB		 1243 break;
1244 }
1245
1246 params.aifs = pos[0] & 0x0f;
1247 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1248 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1249 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1250 params.uapsd = uapsd;
1251
f4ea83dd 1252#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1253 wiphy_debug(local->hw.wiphy,
1254 "WMM queue=%d aci=%d acm=%d aifs=%d "
1255 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1256 queue, aci, acm,
1257 params.aifs, params.cw_min, params.cw_max,
1258 params.txop, params.uapsd);
3330d7be 1259#endif
f6f3def3
EP		 1260 sdata->tx_conf[queue] = params;
1261 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1262 wiphy_debug(local->hw.wiphy,
1263 "failed to set TX queue parameters for queue %d\n",
1264 queue);
f0706e82 1265 }
e1b3ec1a
SG		 1266
1267 /* enable WMM or activate new settings */
4ced3f74 1268 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1269}
1270
7a5158ef
JB		 1271static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1272 u16 capab, bool erp_valid, u8 erp)
5628221c 1273{
bda3933a 1274 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1275 u32 changed = 0;
7a5158ef
JB		 1276 bool use_protection;
1277 bool use_short_preamble;
1278 bool use_short_slot;
1279
1280 if (erp_valid) {
1281 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1282 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1283 } else {
1284 use_protection = false;
1285 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1286 }
1287
1288 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1289 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1290 use_short_slot = true;
5628221c 1291
471b3efd 1292 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1293 bss_conf->use_cts_prot = use_protection;
1294 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1295 }
7e9ed188 1296
d43c7b37 1297 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1298 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1299 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1300 }
d9430a32 1301
7a5158ef 1302 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1303 bss_conf->use_short_slot = use_short_slot;
1304 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1305 }
1306
1307 return changed;
1308}
1309
f698d856 1310static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1311 struct cfg80211_bss *cbss,
ae5eb026 1312 u32 bss_info_changed)
f0706e82 1313{
0c1ad2ca 1314 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1315 struct ieee80211_local *local = sdata->local;
68542962 1316 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1317
ae5eb026 1318 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1319 /* set timing information */
68542962
JO		 1320 bss_conf->beacon_int = cbss->beacon_interval;
1321 bss_conf->timestamp = cbss->tsf;
5628221c 1322
77fdaa12
JB		 1323 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1324 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1325 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1326
7ccc8bd7
FF		 1327 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1328 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1329
0c1ad2ca
JB		 1330 sdata->u.mgd.associated = cbss;
1331 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1332
17e4ec14
JM		 1333 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1334
b291ba11
JB		 1335 /* just to be sure */
1336 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1337 IEEE80211_STA_BEACON_POLL);
1338
9ac19a90 1339 ieee80211_led_assoc(local, 1);
9306102e 1340
e5b900d2
JB		 1341 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1342 bss_conf->dtim_period = bss->dtim_period;
1343 else
1344 bss_conf->dtim_period = 0;
1345
68542962 1346 bss_conf->assoc = 1;
96dd22ac
JB		 1347 /*
1348 * For now just always ask the driver to update the basic rateset
1349 * when we have associated, we aren't checking whether it actually
1350 * changed or not.
1351 */
ae5eb026 1352 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1353
1354 /* And the BSSID changed - we're associated now */
1355 bss_info_changed |= BSS_CHANGED_BSSID;
1356
a97c13c3 1357 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1358 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1359 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1360 bss_info_changed |= BSS_CHANGED_CQM;
1361
68542962
JO		 1362 /* Enable ARP filtering */
1363 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1364 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1365 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1366 }
1367
ae5eb026 1368 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1369
056508dc
JB		 1370 mutex_lock(&local->iflist_mtx);
1371 ieee80211_recalc_ps(local, -1);
025e6be2 1372 ieee80211_recalc_smps(local);
056508dc 1373 mutex_unlock(&local->iflist_mtx);
e0cb686f 1374
8a5b33f5 1375 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1376 netif_carrier_on(sdata->dev);
f0706e82
JB		 1377}
1378
e69e95db 1379static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1380 u16 stype, u16 reason, bool tx,
1381 u8 *frame_buf)
aa458d17 1382{
46900298 1383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1384 struct ieee80211_local *local = sdata->local;
1385 struct sta_info *sta;
3cc5240b 1386 u32 changed = 0;
b291ba11 1387 u8 bssid[ETH_ALEN];
aa458d17 1388
77fdaa12
JB		 1389 ASSERT_MGD_MTX(ifmgd);
1390
37ad3888
JB		 1391 if (WARN_ON_ONCE(tx && !frame_buf))
1392 return;
1393
b291ba11
JB		 1394 if (WARN_ON(!ifmgd->associated))
1395 return;
1396
0c1ad2ca 1397 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1398
77fdaa12
JB		 1399 ifmgd->associated = NULL;
1400 memset(ifmgd->bssid, 0, ETH_ALEN);
1401
1402 /*
1403 * we need to commit the associated = NULL change because the
1404 * scan code uses that to determine whether this iface should
1405 * go to/wake up from powersave or not -- and could otherwise
1406 * wake the queues erroneously.
1407 */
1408 smp_mb();
1409
1410 /*
1411 * Thus, we can only afterwards stop the queues -- to account
1412 * for the case where another CPU is finishing a scan at this
1413 * time -- we don't want the scan code to enable queues.
1414 */
aa458d17 1415
8a5b33f5 1416 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1417 netif_carrier_off(sdata->dev);
1418
2a419056 1419 mutex_lock(&local->sta_mtx);
abe60632 1420 sta = sta_info_get(sdata, bssid);
4cad6c7c 1421 if (sta) {
c2c98fde 1422 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1423 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1424 }
2a419056 1425 mutex_unlock(&local->sta_mtx);
aa458d17 1426
37ad3888
JB		 1427 /* deauthenticate/disassociate now */
1428 if (tx || frame_buf)
1429 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1430 tx, frame_buf);
1431
1432 /* flush out frame */
1433 if (tx)
1434 drv_flush(local, false);
1435
1436 /* remove AP and TDLS peers */
1437 sta_info_flush(local, sdata);
1438
1439 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1440 changed |= ieee80211_reset_erp_info(sdata);
1441
f5e5bf25 1442 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1443 changed |= BSS_CHANGED_ASSOC;
1444 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1445
413ad50a
JB		 1446 /* on the next assoc, re-program HT parameters */
1447 sdata->ht_opmode_valid = false;
ef96a842
BG		 1448 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1449 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1450
a8302de9
VT		 1451 local->power_constr_level = 0;
1452
520eb820
KV		 1453 del_timer_sync(&local->dynamic_ps_timer);
1454 cancel_work_sync(&local->dynamic_ps_enable_work);
1455
e0cb686f
KV		 1456 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1457 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1458 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1459 }
a331400b 1460 local->ps_sdata = NULL;
ae5eb026 1461
68542962
JO		 1462 /* Disable ARP filtering */
1463 if (sdata->vif.bss_conf.arp_filter_enabled) {
1464 sdata->vif.bss_conf.arp_filter_enabled = false;
1465 changed |= BSS_CHANGED_ARP_FILTER;
1466 }
1467
3abead59
JB		 1468 sdata->vif.bss_conf.qos = false;
1469 changed |= BSS_CHANGED_QOS;
1470
0aaffa9b
JB		 1471 /* The BSSID (not really interesting) and HT changed */
1472 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1473 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1474
3cc5240b
JB		 1475 /* channel(_type) changes are handled by ieee80211_hw_config */
1476 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1477 ieee80211_hw_config(local, 0);
1478
3abead59
JB		 1479 /* disassociated - set to defaults now */
1480 ieee80211_set_wmm_default(sdata, false);
1481
b9dcf712
JB		 1482 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1483 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1484 del_timer_sync(&sdata->u.mgd.timer);
1485 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1486}
f0706e82 1487
3cf335d5
KV		 1488void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1489 struct ieee80211_hdr *hdr)
1490{
1491 /*
1492 * We can postpone the mgd.timer whenever receiving unicast frames
1493 * from AP because we know that the connection is working both ways
1494 * at that time. But multicast frames (and hence also beacons) must
1495 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1496 * data idle periods for sending the periodic probe request to the
1497 * AP we're connected to.
3cf335d5 1498 */
b291ba11
JB		 1499 if (is_multicast_ether_addr(hdr->addr1))
1500 return;
1501
be099e82 1502 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1503}
f0706e82 1504
4e5ff376
FF		 1505static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1506{
1507 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1508
1509 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1510 IEEE80211_STA_CONNECTION_POLL)))
1511 return;
1512
1513 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1514 IEEE80211_STA_BEACON_POLL);
1515 mutex_lock(&sdata->local->iflist_mtx);
1516 ieee80211_recalc_ps(sdata->local, -1);
1517 mutex_unlock(&sdata->local->iflist_mtx);
1518
1519 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1520 return;
1521
1522 /*
1523 * We've received a probe response, but are not sure whether
1524 * we have or will be receiving any beacons or data, so let's
1525 * schedule the timers again, just in case.
1526 */
1527 ieee80211_sta_reset_beacon_monitor(sdata);
1528
1529 mod_timer(&ifmgd->conn_mon_timer,
1530 round_jiffies_up(jiffies +
1531 IEEE80211_CONNECTION_IDLE_TIME));
1532}
1533
1534void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1535 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1536{
75706d0e 1537 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1538 return;
1539
04ac3c0e
FF		 1540 if (ack)
1541 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1542
1543 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1544 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1545 if (ack)
1546 sdata->u.mgd.probe_send_count = 0;
1547 else
1548 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1549 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1550 }
1551}
1552
a43abf29
ML		 1553static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1554{
1555 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1556 const u8 *ssid;
f01a067d 1557 u8 *dst = ifmgd->associated->bssid;
180205bd 1558 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1559
1560 /*
1561 * Try sending broadcast probe requests for the last three
1562 * probe requests after the first ones failed since some
1563 * buggy APs only support broadcast probe requests.
1564 */
1565 if (ifmgd->probe_send_count >= unicast_limit)
1566 dst = NULL;
a43abf29 1567
4e5ff376
FF		 1568 /*
1569 * When the hardware reports an accurate Tx ACK status, it's
1570 * better to send a nullfunc frame instead of a probe request,
1571 * as it will kick us off the AP quickly if we aren't associated
1572 * anymore. The timeout will be reset if the frame is ACKed by
1573 * the AP.
1574 */
04ac3c0e
FF		 1575 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1576 ifmgd->nullfunc_failed = false;
4e5ff376 1577 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1578 } else {
4e5ff376 1579 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1580 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1581 (u32) -1, true, false);
4e5ff376 1582 }
a43abf29
ML		 1583
1584 ifmgd->probe_send_count++;
180205bd 1585 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1586 run_again(ifmgd, ifmgd->probe_timeout);
1587}
1588
b291ba11
JB		 1589static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1590 bool beacon)
04de8381 1591{
04de8381 1592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1593 bool already = false;
34bfc411 1594
9607e6b6 1595 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1596 return;
1597
91a3bd76
LR		 1598 if (sdata->local->scanning)
1599 return;
1600
b8bc4b0a
JB		 1601 if (sdata->local->tmp_channel)
1602 return;
1603
77fdaa12
JB		 1604 mutex_lock(&ifmgd->mtx);
1605
1606 if (!ifmgd->associated)
1607 goto out;
1608
a860402d 1609#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1610 if (beacon && net_ratelimit())
1611 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1612 "- sending probe request\n", sdata->name);
a860402d 1613#endif
04de8381 1614
b291ba11
JB		 1615 /*
1616 * The driver/our work has already reported this event or the
1617 * connection monitoring has kicked in and we have already sent
1618 * a probe request. Or maybe the AP died and the driver keeps
1619 * reporting until we disassociate...
1620 *
1621 * In either case we have to ignore the current call to this
1622 * function (except for setting the correct probe reason bit)
1623 * because otherwise we would reset the timer every time and
1624 * never check whether we received a probe response!
1625 */
1626 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1627 IEEE80211_STA_CONNECTION_POLL))
1628 already = true;
1629
1630 if (beacon)
1631 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1632 else
1633 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1634
1635 if (already)
1636 goto out;
1637
4e751843
JB		 1638 mutex_lock(&sdata->local->iflist_mtx);
1639 ieee80211_recalc_ps(sdata->local, -1);
1640 mutex_unlock(&sdata->local->iflist_mtx);
1641
a43abf29
ML		 1642 ifmgd->probe_send_count = 0;
1643 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1644 out:
1645 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1646}
1647
a619a4c0
JO		 1648struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1649 struct ieee80211_vif *vif)
1650{
1651 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1653 struct sk_buff *skb;
1654 const u8 *ssid;
1655
1656 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1657 return NULL;
1658
1659 ASSERT_MGD_MTX(ifmgd);
1660
1661 if (!ifmgd->associated)
1662 return NULL;
1663
1664 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1665 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1666 (u32) -1, ssid + 2, ssid[1],
1667 NULL, 0, true);
a619a4c0
JO		 1668
1669 return skb;
1670}
1671EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1672
1e4dcd01
JO		 1673static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1674{
1675 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1676 struct ieee80211_local *local = sdata->local;
1677 u8 bssid[ETH_ALEN];
5fef7dbc 1678 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1679
1680 mutex_lock(&ifmgd->mtx);
1681 if (!ifmgd->associated) {
1682 mutex_unlock(&ifmgd->mtx);
1683 return;
1684 }
1685
1686 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1687
180205bd
BG		 1688 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1689 sdata->name, bssid);
1e4dcd01 1690
37ad3888
JB		 1691 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1692 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1693 false, frame_buf);
1e4dcd01 1694 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1695
1e4dcd01
JO		 1696 /*
1697 * must be outside lock due to cfg80211,
1698 * but that's not a problem.
1699 */
5fef7dbc 1700 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1701
1702 mutex_lock(&local->mtx);
1703 ieee80211_recalc_idle(local);
1704 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1705}
1706
1707void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1708{
1709 struct ieee80211_sub_if_data *sdata =
1710 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1711 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1713 struct sta_info *sta;
1714
1715 if (ifmgd->associated) {
30fa9047 1716 rcu_read_lock();
a85e1d55
PS		 1717 sta = sta_info_get(sdata, ifmgd->bssid);
1718 if (sta)
1719 sta->beacon_loss_count++;
30fa9047 1720 rcu_read_unlock();
a85e1d55 1721 }
b291ba11 1722
1e4dcd01
JO		 1723 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1724 __ieee80211_connection_loss(sdata);
1725 else
1726 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1727}
1728
04de8381
KV		 1729void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1730{
1731 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1732 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1733
b5878a2d
JB		 1734 trace_api_beacon_loss(sdata);
1735
1e4dcd01
JO		 1736 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1737 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1738}
1739EXPORT_SYMBOL(ieee80211_beacon_loss);
1740
1e4dcd01
JO		 1741void ieee80211_connection_loss(struct ieee80211_vif *vif)
1742{
1743 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1744 struct ieee80211_hw *hw = &sdata->local->hw;
1745
b5878a2d
JB		 1746 trace_api_connection_loss(sdata);
1747
1e4dcd01
JO		 1748 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1749 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1750}
1751EXPORT_SYMBOL(ieee80211_connection_loss);
1752
1753
66e67e41
JB		 1754static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1755 bool assoc)
1756{
1757 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1758
1759 lockdep_assert_held(&sdata->u.mgd.mtx);
1760
66e67e41
JB		 1761 if (!assoc) {
1762 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1763
1764 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1765 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1766 }
1767
1768 cfg80211_put_bss(auth_data->bss);
1769 kfree(auth_data);
1770 sdata->u.mgd.auth_data = NULL;
1771}
1772
1773static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1774 struct ieee80211_mgmt *mgmt, size_t len)
1775{
1776 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1777 u8 *pos;
1778 struct ieee802_11_elems elems;
1779
1780 pos = mgmt->u.auth.variable;
1781 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1782 if (!elems.challenge)
1783 return;
1784 auth_data->expected_transaction = 4;
1785 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1786 elems.challenge - 2, elems.challenge_len + 2,
1787 auth_data->bss->bssid, auth_data->bss->bssid,
1788 auth_data->key, auth_data->key_len,
1789 auth_data->key_idx);
1790}
1791
1792static enum rx_mgmt_action __must_check
1793ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1794 struct ieee80211_mgmt *mgmt, size_t len)
1795{
1796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1797 u8 bssid[ETH_ALEN];
1798 u16 auth_alg, auth_transaction, status_code;
1799 struct sta_info *sta;
1800
1801 lockdep_assert_held(&ifmgd->mtx);
1802
1803 if (len < 24 + 6)
1804 return RX_MGMT_NONE;
1805
1806 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1807 return RX_MGMT_NONE;
1808
1809 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1810
888d04df 1811 if (compare_ether_addr(bssid, mgmt->bssid))
66e67e41
JB		 1812 return RX_MGMT_NONE;
1813
1814 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1815 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1816 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1817
1818 if (auth_alg != ifmgd->auth_data->algorithm ||
1819 auth_transaction != ifmgd->auth_data->expected_transaction)
1820 return RX_MGMT_NONE;
1821
1822 if (status_code != WLAN_STATUS_SUCCESS) {
1823 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1824 sdata->name, mgmt->sa, status_code);
1825 goto out;
1826 }
1827
1828 switch (ifmgd->auth_data->algorithm) {
1829 case WLAN_AUTH_OPEN:
1830 case WLAN_AUTH_LEAP:
1831 case WLAN_AUTH_FT:
1832 break;
1833 case WLAN_AUTH_SHARED_KEY:
1834 if (ifmgd->auth_data->expected_transaction != 4) {
1835 ieee80211_auth_challenge(sdata, mgmt, len);
1836 /* need another frame */
1837 return RX_MGMT_NONE;
1838 }
1839 break;
1840 default:
1841 WARN_ONCE(1, "invalid auth alg %d",
1842 ifmgd->auth_data->algorithm);
1843 return RX_MGMT_NONE;
1844 }
1845
1846 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1847 out:
66e67e41
JB		 1848 ifmgd->auth_data->done = true;
1849 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1850 run_again(ifmgd, ifmgd->auth_data->timeout);
1851
1852 /* move station state to auth */
1853 mutex_lock(&sdata->local->sta_mtx);
1854 sta = sta_info_get(sdata, bssid);
1855 if (!sta) {
1856 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1857 goto out_err;
1858 }
1859 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1860 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1861 sdata->name, bssid);
1862 goto out_err;
1863 }
1864 mutex_unlock(&sdata->local->sta_mtx);
1865
1866 return RX_MGMT_CFG80211_RX_AUTH;
1867 out_err:
1868 mutex_unlock(&sdata->local->sta_mtx);
1869 /* ignore frame -- wait for timeout */
1870 return RX_MGMT_NONE;
1871}
1872
1873
77fdaa12
JB		 1874static enum rx_mgmt_action __must_check
1875ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1876 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1877{
46900298 1878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1879 const u8 *bssid = NULL;
f0706e82
JB		 1880 u16 reason_code;
1881
66e67e41
JB		 1882 lockdep_assert_held(&ifmgd->mtx);
1883
f4ea83dd 1884 if (len < 24 + 2)
77fdaa12 1885 return RX_MGMT_NONE;
f0706e82 1886
66e67e41 1887 if (!ifmgd->associated ||
888d04df 1888 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1889 return RX_MGMT_NONE;
77fdaa12 1890
0c1ad2ca 1891 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1892
1893 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1894
77fdaa12 1895 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1896 sdata->name, bssid, reason_code);
77fdaa12 1897
37ad3888
JB		 1898 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1899
7da7cc1d 1900 mutex_lock(&sdata->local->mtx);
63f170e0 1901 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1902 mutex_unlock(&sdata->local->mtx);
f0706e82 1903
77fdaa12 1904 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1905}
1906
1907
77fdaa12
JB		 1908static enum rx_mgmt_action __must_check
1909ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1910 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1911{
46900298 1912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1913 u16 reason_code;
1914
66e67e41 1915 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1916
66e67e41 1917 if (len < 24 + 2)
77fdaa12
JB		 1918 return RX_MGMT_NONE;
1919
66e67e41 1920 if (!ifmgd->associated ||
888d04df 1921 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1922 return RX_MGMT_NONE;
f0706e82
JB		 1923
1924 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1925
0ff71613 1926 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1927 sdata->name, mgmt->sa, reason_code);
f0706e82 1928
37ad3888
JB		 1929 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1930
7da7cc1d 1931 mutex_lock(&sdata->local->mtx);
bc83b681 1932 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1933 mutex_unlock(&sdata->local->mtx);
37ad3888 1934
77fdaa12 1935 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1936}
1937
c74d084f
CL		 1938static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1939 u8 *supp_rates, unsigned int supp_rates_len,
1940 u32 *rates, u32 *basic_rates,
1941 bool *have_higher_than_11mbit,
1942 int *min_rate, int *min_rate_index)
1943{
1944 int i, j;
1945
1946 for (i = 0; i < supp_rates_len; i++) {
1947 int rate = (supp_rates[i] & 0x7f) * 5;
1948 bool is_basic = !!(supp_rates[i] & 0x80);
1949
1950 if (rate > 110)
1951 *have_higher_than_11mbit = true;
1952
1953 /*
1954 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1955 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1956 *
1957 * Note: Even through the membership selector and the basic
1958 * rate flag share the same bit, they are not exactly
1959 * the same.
1960 */
1961 if (!!(supp_rates[i] & 0x80) &&
1962 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1963 continue;
1964
1965 for (j = 0; j < sband->n_bitrates; j++) {
1966 if (sband->bitrates[j].bitrate == rate) {
1967 *rates |= BIT(j);
1968 if (is_basic)
1969 *basic_rates |= BIT(j);
1970 if (rate < *min_rate) {
1971 *min_rate = rate;
1972 *min_rate_index = j;
1973 }
1974 break;
1975 }
1976 }
1977 }
1978}
f0706e82 1979
66e67e41
JB		 1980static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1981 bool assoc)
1982{
1983 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1984
1985 lockdep_assert_held(&sdata->u.mgd.mtx);
1986
66e67e41
JB		 1987 if (!assoc) {
1988 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1989
1990 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1991 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1992 }
1993
1994 kfree(assoc_data);
1995 sdata->u.mgd.assoc_data = NULL;
1996}
1997
1998static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1999 struct cfg80211_bss *cbss,
af6b6374 2000 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2001{
46900298 2002 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2003 struct ieee80211_local *local = sdata->local;
8318d78a 2004 struct ieee80211_supported_band *sband;
f0706e82 2005 struct sta_info *sta;
af6b6374 2006 u8 *pos;
881d948c 2007 u32 rates, basic_rates;
af6b6374 2008 u16 capab_info, aid;
f0706e82 2009 struct ieee802_11_elems elems;
bda3933a 2010 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2011 u32 changed = 0;
c74d084f 2012 int err;
5d1ec85f 2013 bool have_higher_than_11mbit = false;
ae5eb026 2014 u16 ap_ht_cap_flags;
3432f923 2015 int min_rate = INT_MAX, min_rate_index = -1;
f0706e82 2016
af6b6374 2017 /* AssocResp and ReassocResp have identical structure */
f0706e82 2018
f0706e82 2019 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2020 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2021
1dd84aa2 2022 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 2023 printk(KERN_DEBUG
2024 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2025 sdata->name, aid);
1dd84aa2
JB		 2026 aid &= ~(BIT(15) | BIT(14));
2027
05cb9108
JB		 2028 ifmgd->broken_ap = false;
2029
2030 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2031 printk(KERN_DEBUG
2032 "%s: invalid AID value %d (out of range), turn off PS\n",
2033 sdata->name, aid);
2034 aid = 0;
2035 ifmgd->broken_ap = true;
2036 }
2037
af6b6374
JB		 2038 pos = mgmt->u.assoc_resp.variable;
2039 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2040
f0706e82
JB		 2041 if (!elems.supp_rates) {
2042 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 2043 sdata->name);
af6b6374 2044 return false;
f0706e82
JB		 2045 }
2046
46900298 2047 ifmgd->aid = aid;
f0706e82 2048
2a33bee2
GE		 2049 mutex_lock(&sdata->local->sta_mtx);
2050 /*
2051 * station info was already allocated and inserted before
2052 * the association and should be available to us
2053 */
7852e361 2054 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2055 if (WARN_ON(!sta)) {
2056 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2057 return false;
77fdaa12 2058 }
05e5e883 2059
60f8b39c
JB		 2060 rates = 0;
2061 basic_rates = 0;
66e67e41 2062 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2063
c74d084f
CL		 2064 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
2065 &rates, &basic_rates, &have_higher_than_11mbit,
2066 &min_rate, &min_rate_index);
f0706e82 2067
c74d084f
CL		 2068 ieee80211_get_rates(sband, elems.ext_supp_rates,
2069 elems.ext_supp_rates_len, &rates, &basic_rates,
2070 &have_higher_than_11mbit,
2071 &min_rate, &min_rate_index);
f0706e82 2072
3432f923
EP		 2073 /*
2074 * some buggy APs don't advertise basic_rates. use the lowest
2075 * supported rate instead.
2076 */
2077 if (unlikely(!basic_rates) && min_rate_index >= 0) {
2078 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
2079 "Using min supported rate instead.\n", sdata->name);
2080 basic_rates = BIT(min_rate_index);
2081 }
2082
66e67e41 2083 sta->sta.supp_rates[local->oper_channel->band] = rates;
bda3933a 2084 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 2085
2086 /* cf. IEEE 802.11 9.2.12 */
66e67e41 2087 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 2088 have_higher_than_11mbit)
2089 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2090 else
2091 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2092
ab1faead 2093 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2094 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2095 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 2096
2097 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 2098
4b7679a5 2099 rate_control_rate_init(sta);
f0706e82 2100
46900298 2101 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2102 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2103
ddf4ac53 2104 if (elems.wmm_param)
c2c98fde 2105 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2106
c8987876
JB		 2107 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2108 if (!err)
2109 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2110 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2111 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2112 if (err) {
2113 printk(KERN_DEBUG
2114 "%s: failed to move station %pM to desired state\n",
2115 sdata->name, sta->sta.addr);
2116 WARN_ON(__sta_info_destroy(sta));
2117 mutex_unlock(&sdata->local->sta_mtx);
2118 return false;
2119 }
2120
7852e361 2121 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2122
f2176d72
JO		 2123 /*
2124 * Always handle WMM once after association regardless
2125 * of the first value the AP uses. Setting -1 here has
2126 * that effect because the AP values is an unsigned
2127 * 4-bit value.
2128 */
2129 ifmgd->wmm_last_param_set = -1;
2130
ddf4ac53 2131 if (elems.wmm_param)
4ced3f74 2132 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2133 elems.wmm_param_len);
aa837e1d 2134 else
3abead59
JB		 2135 ieee80211_set_wmm_default(sdata, false);
2136 changed |= BSS_CHANGED_QOS;
f0706e82 2137
ae5eb026 2138 if (elems.ht_info_elem && elems.wmm_param &&
ab1faead 2139 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 2140 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 2141 cbss->bssid, ap_ht_cap_flags,
2142 false);
ae5eb026 2143
60f8b39c
JB		 2144 /* set AID and assoc capability,
2145 * ieee80211_set_associated() will tell the driver */
2146 bss_conf->aid = aid;
2147 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2148 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2149
d524215f
FF		 2150 /*
2151 * If we're using 4-addr mode, let the AP know that we're
2152 * doing so, so that it can create the STA VLAN on its side
2153 */
2154 if (ifmgd->use_4addr)
2155 ieee80211_send_4addr_nullfunc(local, sdata);
2156
15b7b062 2157 /*
b291ba11
JB		 2158 * Start timer to probe the connection to the AP now.
2159 * Also start the timer that will detect beacon loss.
15b7b062 2160 */
b291ba11 2161 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2162 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2163
af6b6374 2164 return true;
f0706e82
JB		 2165}
2166
66e67e41
JB		 2167static enum rx_mgmt_action __must_check
2168ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2169 struct ieee80211_mgmt *mgmt, size_t len,
2170 struct cfg80211_bss **bss)
2171{
2172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2173 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2174 u16 capab_info, status_code, aid;
2175 struct ieee802_11_elems elems;
2176 u8 *pos;
2177 bool reassoc;
2178
2179 lockdep_assert_held(&ifmgd->mtx);
2180
2181 if (!assoc_data)
2182 return RX_MGMT_NONE;
888d04df 2183 if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2184 return RX_MGMT_NONE;
2185
2186 /*
2187 * AssocResp and ReassocResp have identical structure, so process both
2188 * of them in this function.
2189 */
2190
2191 if (len < 24 + 6)
2192 return RX_MGMT_NONE;
2193
2194 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2195 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2196 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2197 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2198
2199 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2200 "status=%d aid=%d)\n",
2201 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2202 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2203
2204 pos = mgmt->u.assoc_resp.variable;
2205 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2206
2207 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2208 elems.timeout_int && elems.timeout_int_len == 5 &&
2209 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2210 u32 tu, ms;
2211 tu = get_unaligned_le32(elems.timeout_int + 1);
2212 ms = tu * 1024 / 1000;
2213 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2214 "comeback duration %u TU (%u ms)\n",
2215 sdata->name, mgmt->sa, tu, ms);
2216 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2217 if (ms > IEEE80211_ASSOC_TIMEOUT)
2218 run_again(ifmgd, assoc_data->timeout);
2219 return RX_MGMT_NONE;
2220 }
2221
2222 *bss = assoc_data->bss;
2223
2224 if (status_code != WLAN_STATUS_SUCCESS) {
2225 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2226 sdata->name, mgmt->sa, status_code);
2227 ieee80211_destroy_assoc_data(sdata, false);
2228 } else {
2229 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2230
66e67e41
JB		 2231 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2232 /* oops -- internal error -- send timeout for now */
79ebfb85 2233 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2234 sta_info_destroy_addr(sdata, mgmt->bssid);
2235 cfg80211_put_bss(*bss);
2236 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2237 }
79ebfb85
JB		 2238
2239 /*
2240 * destroy assoc_data afterwards, as otherwise an idle
2241 * recalc after assoc_data is NULL but before associated
2242 * is set can cause the interface to go idle
2243 */
2244 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2245 }
2246
2247 return RX_MGMT_CFG80211_RX_ASSOC;
2248}
98c8fccf
JB		 2249static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2250 struct ieee80211_mgmt *mgmt,
2251 size_t len,
2252 struct ieee80211_rx_status *rx_status,
2253 struct ieee802_11_elems *elems,
2254 bool beacon)
2255{
2256 struct ieee80211_local *local = sdata->local;
2257 int freq;
c2b13452 2258 struct ieee80211_bss *bss;
98c8fccf 2259 struct ieee80211_channel *channel;
56007a02
JB		 2260 bool need_ps = false;
2261
66e67e41 2262 if (sdata->u.mgd.associated &&
888d04df
FF		 2263 compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
2264 == 0) {
56007a02
JB		 2265 bss = (void *)sdata->u.mgd.associated->priv;
2266 /* not previously set so we may need to recalc */
2267 need_ps = !bss->dtim_period;
2268 }
98c8fccf
JB		 2269
2270 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2271 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2272 rx_status->band);
98c8fccf
JB		 2273 else
2274 freq = rx_status->freq;
2275
2276 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2277
2278 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2279 return;
2280
98c8fccf 2281 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2282 channel, beacon);
77fdaa12
JB		 2283 if (bss)
2284 ieee80211_rx_bss_put(local, bss);
2285
2286 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2287 return;
2288
56007a02
JB		 2289 if (need_ps) {
2290 mutex_lock(&local->iflist_mtx);
2291 ieee80211_recalc_ps(local, -1);
2292 mutex_unlock(&local->iflist_mtx);
2293 }
2294
c481ec97 2295 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2296 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2297 ETH_ALEN) == 0)) {
c481ec97
S		 2298 struct ieee80211_channel_sw_ie *sw_elem =
2299 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2300 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2301 bss, rx_status->mactime);
c481ec97 2302 }
f0706e82
JB		 2303}
2304
2305
f698d856 2306static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2307 struct sk_buff *skb)
f0706e82 2308{
af6b6374 2309 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2310 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2311 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2312 size_t baselen, len = skb->len;
ae6a44e3
EK		 2313 struct ieee802_11_elems elems;
2314
15b7b062
KV		 2315 ifmgd = &sdata->u.mgd;
2316
77fdaa12
JB		 2317 ASSERT_MGD_MTX(ifmgd);
2318
888d04df 2319 if (compare_ether_addr(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2320 return; /* ignore ProbeResp to foreign address */
2321
ae6a44e3
EK		 2322 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2323 if (baselen > len)
2324 return;
2325
2326 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2327 &elems);
2328
98c8fccf 2329 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2330
77fdaa12 2331 if (ifmgd->associated &&
888d04df 2332 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
4e5ff376 2333 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2334
2335 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
888d04df
FF		 2336 compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
2337 == 0) {
66e67e41
JB		 2338 /* got probe response, continue with auth */
2339 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2340 ifmgd->auth_data->tries = 0;
2341 ifmgd->auth_data->timeout = jiffies;
2342 run_again(ifmgd, ifmgd->auth_data->timeout);
2343 }
f0706e82
JB		 2344}
2345
d91f36db
JB		 2346/*
2347 * This is the canonical list of information elements we care about,
2348 * the filter code also gives us all changes to the Microsoft OUI
2349 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2350 *
2351 * We implement beacon filtering in software since that means we can
2352 * avoid processing the frame here and in cfg80211, and userspace
2353 * will not be able to tell whether the hardware supports it or not.
2354 *
2355 * XXX: This list needs to be dynamic -- userspace needs to be able to
2356 * add items it requires. It also needs to be able to tell us to
2357 * look out for other vendor IEs.
2358 */
2359static const u64 care_about_ies =
1d4df3a5
JB		 2360 (1ULL << WLAN_EID_COUNTRY) |
2361 (1ULL << WLAN_EID_ERP_INFO) |
2362 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2363 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2364 (1ULL << WLAN_EID_HT_CAPABILITY) |
2365 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 2366
f698d856 2367static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2368 struct ieee80211_mgmt *mgmt,
2369 size_t len,
2370 struct ieee80211_rx_status *rx_status)
2371{
d91f36db 2372 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2373 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2374 size_t baselen;
2375 struct ieee802_11_elems elems;
f698d856 2376 struct ieee80211_local *local = sdata->local;
471b3efd 2377 u32 changed = 0;
d91f36db 2378 bool erp_valid, directed_tim = false;
7a5158ef 2379 u8 erp_value = 0;
d91f36db 2380 u32 ncrc;
77fdaa12
JB		 2381 u8 *bssid;
2382
66e67e41 2383 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2384
ae6a44e3
EK		 2385 /* Process beacon from the current BSS */
2386 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2387 if (baselen > len)
2388 return;
2389
d91f36db 2390 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2391 return;
f0706e82 2392
66e67e41 2393 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
888d04df
FF		 2394 compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
2395 == 0) {
66e67e41
JB		 2396 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2397 len - baselen, &elems);
77fdaa12 2398
66e67e41
JB		 2399 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2400 false);
2401 ifmgd->assoc_data->have_beacon = true;
2402 ifmgd->assoc_data->sent_assoc = false;
2403 /* continue assoc process */
2404 ifmgd->assoc_data->timeout = jiffies;
2405 run_again(ifmgd, ifmgd->assoc_data->timeout);
2406 return;
2407 }
77fdaa12 2408
66e67e41 2409 if (!ifmgd->associated ||
888d04df 2410 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2411 return;
66e67e41 2412 bssid = ifmgd->associated->bssid;
f0706e82 2413
17e4ec14
JM		 2414 /* Track average RSSI from the Beacon frames of the current AP */
2415 ifmgd->last_beacon_signal = rx_status->signal;
2416 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2417 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2418 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2419 ifmgd->last_cqm_event_signal = 0;
391a200a 2420 ifmgd->count_beacon_signal = 1;
615f7b9b 2421 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2422 } else {
2423 ifmgd->ave_beacon_signal =
2424 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2425 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2426 ifmgd->ave_beacon_signal) / 16;
391a200a 2427 ifmgd->count_beacon_signal++;
17e4ec14 2428 }
615f7b9b
MV		 2429
2430 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2431 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2432 int sig = ifmgd->ave_beacon_signal;
2433 int last_sig = ifmgd->last_ave_beacon_signal;
2434
2435 /*
2436 * if signal crosses either of the boundaries, invoke callback
2437 * with appropriate parameters
2438 */
2439 if (sig > ifmgd->rssi_max_thold &&
2440 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2441 ifmgd->last_ave_beacon_signal = sig;
2442 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2443 } else if (sig < ifmgd->rssi_min_thold &&
2444 (last_sig >= ifmgd->rssi_max_thold ||
2445 last_sig == 0)) {
2446 ifmgd->last_ave_beacon_signal = sig;
2447 drv_rssi_callback(local, RSSI_EVENT_LOW);
2448 }
2449 }
2450
17e4ec14 2451 if (bss_conf->cqm_rssi_thold &&
391a200a 2452 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2453 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2454 int sig = ifmgd->ave_beacon_signal / 16;
2455 int last_event = ifmgd->last_cqm_event_signal;
2456 int thold = bss_conf->cqm_rssi_thold;
2457 int hyst = bss_conf->cqm_rssi_hyst;
2458 if (sig < thold &&
2459 (last_event == 0 || sig < last_event - hyst)) {
2460 ifmgd->last_cqm_event_signal = sig;
2461 ieee80211_cqm_rssi_notify(
2462 &sdata->vif,
2463 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2464 GFP_KERNEL);
2465 } else if (sig > thold &&
2466 (last_event == 0 || sig > last_event + hyst)) {
2467 ifmgd->last_cqm_event_signal = sig;
2468 ieee80211_cqm_rssi_notify(
2469 &sdata->vif,
2470 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2471 GFP_KERNEL);
2472 }
2473 }
2474
b291ba11 2475 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 2476#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2477 if (net_ratelimit()) {
2478 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 2479 "to a received beacon\n", sdata->name);
92778180
JM		 2480 }
2481#endif
b291ba11 2482 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2483 mutex_lock(&local->iflist_mtx);
2484 ieee80211_recalc_ps(local, -1);
2485 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2486 }
2487
b291ba11
JB		 2488 /*
2489 * Push the beacon loss detection into the future since
2490 * we are processing a beacon from the AP just now.
2491 */
d3a910a8 2492 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2493
d91f36db
JB		 2494 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2495 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2496 len - baselen, &elems,
2497 care_about_ies, ncrc);
2498
2499 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2500 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2501 ifmgd->aid);
d91f36db 2502
d8ec4433 2503 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2504 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2505 true);
d91f36db 2506
4ced3f74 2507 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2508 elems.wmm_param_len);
2509 }
fe3fa827 2510
25c9c875 2511 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2512 if (directed_tim) {
572e0012
KV		 2513 if (local->hw.conf.dynamic_ps_timeout > 0) {
2514 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2515 ieee80211_hw_config(local,
2516 IEEE80211_CONF_CHANGE_PS);
2517 ieee80211_send_nullfunc(local, sdata, 0);
2518 } else {
2519 local->pspolling = true;
2520
2521 /*
2522 * Here is assumed that the driver will be
2523 * able to send ps-poll frame and receive a
2524 * response even though power save mode is
2525 * enabled, but some drivers might require
2526 * to disable power save here. This needs
2527 * to be investigated.
2528 */
2529 ieee80211_send_pspoll(local, sdata);
2530 }
a97b77b9
VN		 2531 }
2532 }
7a5158ef 2533
d8ec4433 2534 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2535 return;
2536 ifmgd->beacon_crc = ncrc;
d8ec4433 2537 ifmgd->beacon_crc_valid = true;
30196673 2538
7a5158ef
JB		 2539 if (elems.erp_info && elems.erp_info_len >= 1) {
2540 erp_valid = true;
2541 erp_value = elems.erp_info[0];
2542 } else {
2543 erp_valid = false;
50c4afb9 2544 }
7a5158ef
JB		 2545 changed |= ieee80211_handle_bss_capability(sdata,
2546 le16_to_cpu(mgmt->u.beacon.capab_info),
2547 erp_valid, erp_value);
f0706e82 2548
d3c990fb 2549
53d6f81c 2550 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 2551 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 2552 struct sta_info *sta;
2553 struct ieee80211_supported_band *sband;
2554 u16 ap_ht_cap_flags;
2555
2556 rcu_read_lock();
2557
abe60632 2558 sta = sta_info_get(sdata, bssid);
77fdaa12 2559 if (WARN_ON(!sta)) {
ae5eb026
JB		 2560 rcu_read_unlock();
2561 return;
2562 }
2563
2564 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2565
ef96a842 2566 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
ae5eb026
JB		 2567 elems.ht_cap_elem, &sta->sta.ht_cap);
2568
2569 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2570
2571 rcu_read_unlock();
2572
2573 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 2574 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 2575 }
2576
8b19e6ca 2577 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2578 if (elems.country_elem) {
a8302de9
VT		 2579 /* TODO: IBSS also needs this */
2580 if (elems.pwr_constr_elem)
2581 ieee80211_handle_pwr_constr(sdata,
2582 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2583 elems.pwr_constr_elem,
2584 elems.pwr_constr_elem_len);
3f2355cb
LR		 2585 }
2586
471b3efd 2587 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2588}
2589
1fa57d01
JB		 2590void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2591 struct sk_buff *skb)
f0706e82 2592{
77fdaa12 2593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2594 struct ieee80211_rx_status *rx_status;
f0706e82 2595 struct ieee80211_mgmt *mgmt;
66e67e41 2596 struct cfg80211_bss *bss = NULL;
77fdaa12 2597 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2598 u16 fc;
2599
f0706e82
JB		 2600 rx_status = (struct ieee80211_rx_status *) skb->cb;
2601 mgmt = (struct ieee80211_mgmt *) skb->data;
2602 fc = le16_to_cpu(mgmt->frame_control);
2603
77fdaa12
JB		 2604 mutex_lock(&ifmgd->mtx);
2605
66e67e41
JB		 2606 switch (fc & IEEE80211_FCTL_STYPE) {
2607 case IEEE80211_STYPE_BEACON:
2608 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2609 break;
2610 case IEEE80211_STYPE_PROBE_RESP:
2611 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2612 break;
2613 case IEEE80211_STYPE_AUTH:
2614 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2615 break;
2616 case IEEE80211_STYPE_DEAUTH:
2617 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2618 break;
2619 case IEEE80211_STYPE_DISASSOC:
2620 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2621 break;
2622 case IEEE80211_STYPE_ASSOC_RESP:
2623 case IEEE80211_STYPE_REASSOC_RESP:
2624 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2625 break;
2626 case IEEE80211_STYPE_ACTION:
2627 switch (mgmt->u.action.category) {
2628 case WLAN_CATEGORY_SPECTRUM_MGMT:
2629 ieee80211_sta_process_chanswitch(sdata,
2630 &mgmt->u.action.u.chan_switch.sw_elem,
2631 (void *)ifmgd->associated->priv,
2632 rx_status->mactime);
77fdaa12 2633 break;
77fdaa12 2634 }
77fdaa12 2635 }
77fdaa12
JB		 2636 mutex_unlock(&ifmgd->mtx);
2637
66e67e41
JB		 2638 switch (rma) {
2639 case RX_MGMT_NONE:
2640 /* no action */
2641 break;
2642 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2643 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2644 break;
2645 case RX_MGMT_CFG80211_DISASSOC:
2646 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2647 break;
2648 case RX_MGMT_CFG80211_RX_AUTH:
2649 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2650 break;
2651 case RX_MGMT_CFG80211_RX_ASSOC:
2652 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2653 break;
2654 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2655 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2656 break;
2657 default:
2658 WARN(1, "unexpected: %d", rma);
b054b747 2659 }
f0706e82
JB		 2660}
2661
9c6bd790 2662static void ieee80211_sta_timer(unsigned long data)
f0706e82 2663{
60f8b39c
JB		 2664 struct ieee80211_sub_if_data *sdata =
2665 (struct ieee80211_sub_if_data *) data;
46900298 2666 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2667 struct ieee80211_local *local = sdata->local;
f0706e82 2668
5bb644a0
JB		 2669 if (local->quiescing) {
2670 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2671 return;
2672 }
2673
64592c8f 2674 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2675}
2676
04ac3c0e 2677static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2678 u8 *bssid, u8 reason)
04ac3c0e
FF		 2679{
2680 struct ieee80211_local *local = sdata->local;
2681 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2682 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2683
2684 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2685 IEEE80211_STA_BEACON_POLL);
2686
37ad3888
JB		 2687 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2688 false, frame_buf);
04ac3c0e 2689 mutex_unlock(&ifmgd->mtx);
37ad3888 2690
04ac3c0e
FF		 2691 /*
2692 * must be outside lock due to cfg80211,
2693 * but that's not a problem.
2694 */
5fef7dbc 2695 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2696
2697 mutex_lock(&local->mtx);
2698 ieee80211_recalc_idle(local);
2699 mutex_unlock(&local->mtx);
2700
04ac3c0e
FF		 2701 mutex_lock(&ifmgd->mtx);
2702}
2703
66e67e41
JB		 2704static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2705{
2706 struct ieee80211_local *local = sdata->local;
2707 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2708 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2709
2710 lockdep_assert_held(&ifmgd->mtx);
2711
2712 if (WARN_ON_ONCE(!auth_data))
2713 return -EINVAL;
2714
66e67e41
JB		 2715 auth_data->tries++;
2716
2717 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2718 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2719 sdata->name, auth_data->bss->bssid);
2720
2721 /*
2722 * Most likely AP is not in the range so remove the
2723 * bss struct for that AP.
2724 */
2725 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2726
2727 return -ETIMEDOUT;
2728 }
2729
2730 if (auth_data->bss->proberesp_ies) {
2731 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2732 sdata->name, auth_data->bss->bssid, auth_data->tries,
2733 IEEE80211_AUTH_MAX_TRIES);
2734
2735 auth_data->expected_transaction = 2;
2736 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2737 auth_data->ie, auth_data->ie_len,
2738 auth_data->bss->bssid,
2739 auth_data->bss->bssid, NULL, 0, 0);
2740 } else {
2741 const u8 *ssidie;
2742
2743 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2744 sdata->name, auth_data->bss->bssid, auth_data->tries,
2745 IEEE80211_AUTH_MAX_TRIES);
2746
2747 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2748 if (!ssidie)
2749 return -EINVAL;
2750 /*
2751 * Direct probe is sent to broadcast address as some APs
2752 * will not answer to direct packet in unassociated state.
2753 */
2754 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2755 NULL, 0, (u32) -1, true, false);
2756 }
2757
2758 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2759 run_again(ifmgd, auth_data->timeout);
2760
2761 return 0;
2762}
2763
2764static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2765{
2766 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2767 struct ieee80211_local *local = sdata->local;
2768
2769 lockdep_assert_held(&sdata->u.mgd.mtx);
2770
66e67e41
JB		 2771 assoc_data->tries++;
2772 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2773 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2774 sdata->name, assoc_data->bss->bssid);
2775
2776 /*
2777 * Most likely AP is not in the range so remove the
2778 * bss struct for that AP.
2779 */
2780 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2781
2782 return -ETIMEDOUT;
2783 }
2784
2785 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2786 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2787 IEEE80211_ASSOC_MAX_TRIES);
2788 ieee80211_send_assoc(sdata);
2789
2790 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2791 run_again(&sdata->u.mgd, assoc_data->timeout);
2792
2793 return 0;
2794}
2795
1fa57d01 2796void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2797{
9c6bd790 2798 struct ieee80211_local *local = sdata->local;
1fa57d01 2799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2800
77fdaa12
JB		 2801 mutex_lock(&ifmgd->mtx);
2802
66e67e41
JB		 2803 if (ifmgd->auth_data &&
2804 time_after(jiffies, ifmgd->auth_data->timeout)) {
2805 if (ifmgd->auth_data->done) {
2806 /*
2807 * ok ... we waited for assoc but userspace didn't,
2808 * so let's just kill the auth data
2809 */
2810 ieee80211_destroy_auth_data(sdata, false);
2811 } else if (ieee80211_probe_auth(sdata)) {
2812 u8 bssid[ETH_ALEN];
2813
2814 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2815
2816 ieee80211_destroy_auth_data(sdata, false);
2817
2818 mutex_unlock(&ifmgd->mtx);
2819 cfg80211_send_auth_timeout(sdata->dev, bssid);
2820 mutex_lock(&ifmgd->mtx);
2821 }
2822 } else if (ifmgd->auth_data)
2823 run_again(ifmgd, ifmgd->auth_data->timeout);
2824
2825 if (ifmgd->assoc_data &&
2826 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2827 if (!ifmgd->assoc_data->have_beacon ||
2828 ieee80211_do_assoc(sdata)) {
2829 u8 bssid[ETH_ALEN];
2830
2831 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2832
2833 ieee80211_destroy_assoc_data(sdata, false);
2834
2835 mutex_unlock(&ifmgd->mtx);
2836 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2837 mutex_lock(&ifmgd->mtx);
2838 }
2839 } else if (ifmgd->assoc_data)
2840 run_again(ifmgd, ifmgd->assoc_data->timeout);
2841
b291ba11
JB		 2842 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2843 IEEE80211_STA_CONNECTION_POLL) &&
2844 ifmgd->associated) {
a43abf29 2845 u8 bssid[ETH_ALEN];
72a8a3ed 2846 int max_tries;
a43abf29 2847
0c1ad2ca 2848 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2849
72a8a3ed 2850 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2851 max_tries = max_nullfunc_tries;
72a8a3ed 2852 else
180205bd 2853 max_tries = max_probe_tries;
72a8a3ed 2854
4e5ff376
FF		 2855 /* ACK received for nullfunc probing frame */
2856 if (!ifmgd->probe_send_count)
2857 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2858 else if (ifmgd->nullfunc_failed) {
2859 if (ifmgd->probe_send_count < max_tries) {
2860#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2861 wiphy_debug(local->hw.wiphy,
2862 "%s: No ack for nullfunc frame to"
bfc31df3 2863 " AP %pM, try %d/%i\n",
04ac3c0e 2864 sdata->name, bssid,
bfc31df3 2865 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2866#endif
2867 ieee80211_mgd_probe_ap_send(sdata);
2868 } else {
2869#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2870 wiphy_debug(local->hw.wiphy,
2871 "%s: No ack for nullfunc frame to"
2872 " AP %pM, disconnecting.\n",
c658e5db 2873 sdata->name, bssid);
04ac3c0e 2874#endif
95acac61
JB		 2875 ieee80211_sta_connection_lost(sdata, bssid,
2876 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2877 }
2878 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2879 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2880 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2881#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2882 wiphy_debug(local->hw.wiphy,
2883 "%s: Failed to send nullfunc to AP %pM"
2884 " after %dms, disconnecting.\n",
2885 sdata->name,
180205bd 2886 bssid, probe_wait_ms);
04ac3c0e 2887#endif
95acac61
JB		 2888 ieee80211_sta_connection_lost(sdata, bssid,
2889 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2890 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2891#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2892 wiphy_debug(local->hw.wiphy,
2893 "%s: No probe response from AP %pM"
bfc31df3 2894 " after %dms, try %d/%i\n",
b38afa87 2895 sdata->name,
180205bd 2896 bssid, probe_wait_ms,
bfc31df3 2897 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2898#endif
2899 ieee80211_mgd_probe_ap_send(sdata);
2900 } else {
b291ba11
JB		 2901 /*
2902 * We actually lost the connection ... or did we?
2903 * Let's make sure!
2904 */
b38afa87
BG		 2905 wiphy_debug(local->hw.wiphy,
2906 "%s: No probe response from AP %pM"
2907 " after %dms, disconnecting.\n",
2908 sdata->name,
180205bd 2909 bssid, probe_wait_ms);
04ac3c0e 2910
95acac61
JB		 2911 ieee80211_sta_connection_lost(sdata, bssid,
2912 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2913 }
2914 }
2915
77fdaa12 2916 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2917
2918 mutex_lock(&local->mtx);
2919 ieee80211_recalc_idle(local);
2920 mutex_unlock(&local->mtx);
f0706e82
JB		 2921}
2922
b291ba11
JB		 2923static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2924{
2925 struct ieee80211_sub_if_data *sdata =
2926 (struct ieee80211_sub_if_data *) data;
2927 struct ieee80211_local *local = sdata->local;
2928
2929 if (local->quiescing)
2930 return;
2931
1e4dcd01
JO		 2932 ieee80211_queue_work(&sdata->local->hw,
2933 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2934}
2935
2936static void ieee80211_sta_conn_mon_timer(unsigned long data)
2937{
2938 struct ieee80211_sub_if_data *sdata =
2939 (struct ieee80211_sub_if_data *) data;
2940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2941 struct ieee80211_local *local = sdata->local;
2942
2943 if (local->quiescing)
2944 return;
2945
42935eca 2946 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2947}
2948
2949static void ieee80211_sta_monitor_work(struct work_struct *work)
2950{
2951 struct ieee80211_sub_if_data *sdata =
2952 container_of(work, struct ieee80211_sub_if_data,
2953 u.mgd.monitor_work);
2954
2955 ieee80211_mgd_probe_ap(sdata, false);
2956}
2957
9c6bd790
JB		 2958static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2959{
494f1fe5
EP		 2960 u32 flags;
2961
ad935687 2962 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2963 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2964 IEEE80211_STA_CONNECTION_POLL);
ad935687 2965
b291ba11 2966 /* let's probe the connection once */
494f1fe5
EP		 2967 flags = sdata->local->hw.flags;
2968 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2969 ieee80211_queue_work(&sdata->local->hw,
2970 &sdata->u.mgd.monitor_work);
b291ba11 2971 /* and do all the other regular work too */
64592c8f 2972 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2973 }
9c6bd790 2974}
f0706e82 2975
5bb644a0
JB		 2976#ifdef CONFIG_PM
2977void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2978{
2979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2980
2981 /*
2982 * we need to use atomic bitops for the running bits
2983 * only because both timers might fire at the same
2984 * time -- the code here is properly synchronised.
2985 */
2986
d1f5b7a3
JB		 2987 cancel_work_sync(&ifmgd->request_smps_work);
2988
0ecfe806 2989 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2990 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2991 if (del_timer_sync(&ifmgd->timer))
2992 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2993
2994 cancel_work_sync(&ifmgd->chswitch_work);
2995 if (del_timer_sync(&ifmgd->chswitch_timer))
2996 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2997
b291ba11
JB		 2998 /* these will just be re-established on connection */
2999 del_timer_sync(&ifmgd->conn_mon_timer);
3000 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3001}
3002
3003void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3004{
3005 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3006
676b58c2
RM		 3007 if (!ifmgd->associated)
3008 return;
3009
95acac61
JB		 3010 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3011 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3012 mutex_lock(&ifmgd->mtx);
3013 if (ifmgd->associated) {
3014#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
3015 wiphy_debug(sdata->local->hw.wiphy,
3016 "%s: driver requested disconnect after resume.\n",
3017 sdata->name);
3018#endif
3019 ieee80211_sta_connection_lost(sdata,
3020 ifmgd->associated->bssid,
3021 WLAN_REASON_UNSPECIFIED);
3022 mutex_unlock(&ifmgd->mtx);
3023 return;
3024 }
3025 mutex_unlock(&ifmgd->mtx);
3026 }
3027
5bb644a0
JB		 3028 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3029 add_timer(&ifmgd->timer);
3030 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3031 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3032 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 3033 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 3034}
3035#endif
3036
9c6bd790
JB		 3037/* interface setup */
3038void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3039{
46900298 3040 struct ieee80211_if_managed *ifmgd;
988c0f72 3041
46900298 3042 ifmgd = &sdata->u.mgd;
b291ba11 3043 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3044 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3045 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3046 ieee80211_beacon_connection_loss_work);
d1f5b7a3 3047 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3048 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3049 (unsigned long) sdata);
b291ba11
JB		 3050 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3051 (unsigned long) sdata);
3052 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3053 (unsigned long) sdata);
46900298 3054 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3055 (unsigned long) sdata);
9c6bd790 3056
ab1faead 3057 ifmgd->flags = 0;
1478acb3 3058 ifmgd->powersave = sdata->wdev.ps;
bbbdff9e 3059
77fdaa12 3060 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3061
3062 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3063 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3064 else
3065 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3066}
3067
77fdaa12
JB		 3068/* scan finished notification */
3069void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3070{
77fdaa12 3071 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 3072
77fdaa12
JB		 3073 /* Restart STA timers */
3074 rcu_read_lock();
3075 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3076 ieee80211_restart_sta_timer(sdata);
3077 rcu_read_unlock();
3078}
60f8b39c 3079
77fdaa12
JB		 3080int ieee80211_max_network_latency(struct notifier_block *nb,
3081 unsigned long data, void *dummy)
3082{
3083 s32 latency_usec = (s32) data;
3084 struct ieee80211_local *local =
3085 container_of(nb, struct ieee80211_local,
3086 network_latency_notifier);
1fa6f4af 3087
77fdaa12
JB		 3088 mutex_lock(&local->iflist_mtx);
3089 ieee80211_recalc_ps(local, latency_usec);
3090 mutex_unlock(&local->iflist_mtx);
dfe67012 3091
77fdaa12 3092 return 0;
9c6bd790
JB		 3093}
3094
77fdaa12
JB		 3095/* config hooks */
3096int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3097 struct cfg80211_auth_request *req)
9c6bd790 3098{
66e67e41
JB		 3099 struct ieee80211_local *local = sdata->local;
3100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3101 struct ieee80211_mgd_auth_data *auth_data;
3102 struct sta_info *sta;
77fdaa12 3103 u16 auth_alg;
66e67e41
JB		 3104 int err;
3105
3106 /* prepare auth data structure */
9c6bd790 3107
77fdaa12
JB		 3108 switch (req->auth_type) {
3109 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3110 auth_alg = WLAN_AUTH_OPEN;
3111 break;
3112 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3113 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3114 return -EOPNOTSUPP;
77fdaa12
JB		 3115 auth_alg = WLAN_AUTH_SHARED_KEY;
3116 break;
3117 case NL80211_AUTHTYPE_FT:
3118 auth_alg = WLAN_AUTH_FT;
3119 break;
3120 case NL80211_AUTHTYPE_NETWORK_EAP:
3121 auth_alg = WLAN_AUTH_LEAP;
3122 break;
3123 default:
3124 return -EOPNOTSUPP;
60f8b39c 3125 }
77fdaa12 3126
66e67e41
JB		 3127 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3128 if (!auth_data)
9c6bd790 3129 return -ENOMEM;
77fdaa12 3130
66e67e41 3131 auth_data->bss = req->bss;
77fdaa12
JB		 3132
3133 if (req->ie && req->ie_len) {
66e67e41
JB		 3134 memcpy(auth_data->ie, req->ie, req->ie_len);
3135 auth_data->ie_len = req->ie_len;
9c6bd790 3136 }
77fdaa12 3137
fffd0934 3138 if (req->key && req->key_len) {
66e67e41
JB		 3139 auth_data->key_len = req->key_len;
3140 auth_data->key_idx = req->key_idx;
3141 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3142 }
3143
66e67e41 3144 auth_data->algorithm = auth_alg;
60f8b39c 3145
66e67e41 3146 /* try to authenticate/probe */
2a33bee2 3147
66e67e41 3148 mutex_lock(&ifmgd->mtx);
2a33bee2 3149
66e67e41
JB		 3150 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3151 ifmgd->assoc_data) {
3152 err = -EBUSY;
3153 goto err_free;
2a33bee2
GE		 3154 }
3155
66e67e41
JB		 3156 if (ifmgd->auth_data)
3157 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3158
66e67e41
JB		 3159 /* prep auth_data so we don't go into idle on disassoc */
3160 ifmgd->auth_data = auth_data;
af6b6374 3161
66e67e41 3162 if (ifmgd->associated)
37ad3888 3163 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3164
66e67e41
JB		 3165 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3166 sdata->name, req->bss->bssid);
e5b900d2 3167
66e67e41
JB		 3168 mutex_lock(&local->mtx);
3169 ieee80211_recalc_idle(sdata->local);
3170 mutex_unlock(&local->mtx);
e5b900d2 3171
66e67e41
JB		 3172 /* switch to the right channel */
3173 local->oper_channel = req->bss->channel;
3174 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
af6b6374 3175
66e67e41
JB		 3176 /* set BSSID */
3177 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3178 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
b2abb6e2 3179
66e67e41
JB		 3180 /* add station entry */
3181 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3182 if (!sta) {
3183 err = -ENOMEM;
3184 goto err_clear;
3185 }
68542962 3186
66e67e41
JB		 3187 err = sta_info_insert(sta);
3188 if (err) {
3189 printk(KERN_DEBUG
3190 "%s: failed to insert STA entry for the AP %pM (error %d)\n",
3191 sdata->name, req->bss->bssid, err);
3192 goto err_clear;
af6b6374
JB		 3193 }
3194
66e67e41
JB		 3195 err = ieee80211_probe_auth(sdata);
3196 if (err) {
66e67e41
JB		 3197 sta_info_destroy_addr(sdata, req->bss->bssid);
3198 goto err_clear;
3199 }
3200
3201 /* hold our own reference */
3202 cfg80211_ref_bss(auth_data->bss);
3203 err = 0;
3204 goto out_unlock;
3205
3206 err_clear:
3207 ifmgd->auth_data = NULL;
3208 err_free:
3209 kfree(auth_data);
3210 out_unlock:
3211 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3212
66e67e41 3213 return err;
af6b6374
JB		 3214}
3215
77fdaa12
JB		 3216int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3217 struct cfg80211_assoc_request *req)
f0706e82 3218{
66e67e41 3219 struct ieee80211_local *local = sdata->local;
77fdaa12 3220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3221 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3222 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3223 struct ieee80211_supported_band *sband;
66e67e41
JB		 3224 struct sta_info *sta;
3225 const u8 *ssidie;
2a33bee2 3226 int i, err;
f0706e82 3227
66e67e41
JB		 3228 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3229 if (!ssidie)
3230 return -EINVAL;
3231
3232 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3233 if (!assoc_data)
3234 return -ENOMEM;
3235
77fdaa12 3236 mutex_lock(&ifmgd->mtx);
9c87ba67 3237
66e67e41 3238 if (ifmgd->associated)
37ad3888 3239 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3240
3241 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3242 err = -EBUSY;
3243 goto err_free;
af6b6374 3244 }
77fdaa12 3245
66e67e41
JB		 3246 if (ifmgd->assoc_data) {
3247 err = -EBUSY;
3248 goto err_free;
3249 }
77fdaa12 3250
66e67e41
JB		 3251 if (ifmgd->auth_data) {
3252 bool match;
3253
3254 /* keep sta info, bssid if matching */
888d04df 3255 match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
66e67e41 3256 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3257 }
3258
66e67e41
JB		 3259 /* prepare assoc data */
3260
77fdaa12 3261 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3262 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3263
d8ec4433
JO		 3264 ifmgd->beacon_crc_valid = false;
3265
de5036aa
JB		 3266 /*
3267 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3268 * We still associate in non-HT mode (11a/b/g) if any one of these
3269 * ciphers is configured as pairwise.
3270 * We can set this to true for non-11n hardware, that'll be checked
3271 * separately along with the peer capabilities.
3272 */
77fdaa12
JB		 3273 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3274 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3275 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3276 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3277 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3278
ef96a842
BG		 3279 if (req->flags & ASSOC_REQ_DISABLE_HT)
3280 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3281
4e74bfdb
JB		 3282 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3283 sband = local->hw.wiphy->bands[req->bss->channel->band];
3284 if (!sband->ht_cap.ht_supported ||
3285 local->hw.queues < 4 || !bss->wmm_used)
3286 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3287
ef96a842
BG		 3288 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3289 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3290 sizeof(ifmgd->ht_capa_mask));
3291
77fdaa12 3292 if (req->ie && req->ie_len) {
66e67e41
JB		 3293 memcpy(assoc_data->ie, req->ie, req->ie_len);
3294 assoc_data->ie_len = req->ie_len;
3295 }
f679f65d 3296
66e67e41 3297 assoc_data->bss = req->bss;
f679f65d 3298
af6b6374
JB		 3299 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3300 if (ifmgd->powersave)
3301 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3302 else
3303 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3304 } else
3305 ifmgd->ap_smps = ifmgd->req_smps;
3306
66e67e41
JB		 3307 assoc_data->capability = req->bss->capability;
3308 assoc_data->wmm_used = bss->wmm_used;
3309 assoc_data->supp_rates = bss->supp_rates;
3310 assoc_data->supp_rates_len = bss->supp_rates_len;
3311 assoc_data->ht_information_ie =
f679f65d 3312 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 3313
ab13315a
KV		 3314 if (bss->wmm_used && bss->uapsd_supported &&
3315 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
66e67e41 3316 assoc_data->uapsd_used = true;
ab13315a
KV		 3317 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3318 } else {
66e67e41 3319 assoc_data->uapsd_used = false;
ab13315a
KV		 3320 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3321 }
3322
66e67e41
JB		 3323 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3324 assoc_data->ssid_len = ssidie[1];
63f170e0 3325
77fdaa12 3326 if (req->prev_bssid)
66e67e41 3327 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3328
3329 if (req->use_mfp) {
3330 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3331 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3332 } else {
3333 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3334 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3335 }
3336
3337 if (req->crypto.control_port)
3338 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3339 else
3340 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3341
a621fa4d
JB		 3342 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3343 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3344
66e67e41
JB		 3345 /* kick off associate process */
3346
3347 ifmgd->assoc_data = assoc_data;
3348
3349 mutex_lock(&local->mtx);
3350 ieee80211_recalc_idle(sdata->local);
3351 mutex_unlock(&local->mtx);
3352
3353 /* switch to the right channel */
3354 local->oper_channel = req->bss->channel;
3355 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
3356
3357 rcu_read_lock();
3358 sta = sta_info_get(sdata, req->bss->bssid);
3359 rcu_read_unlock();
3360
3361 if (!sta) {
3362 /* set BSSID */
3363 memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN);
3364 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
3365
3366 sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL);
3367 if (!sta) {
3368 err = -ENOMEM;
3369 goto err_clear;
3370 }
3371
3372 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3373
3374 err = sta_info_insert(sta);
3375 sta = NULL;
3376 if (err) {
3377 printk(KERN_DEBUG
3378 "%s: failed to insert STA entry for the AP (error %d)\n",
3379 sdata->name, err);
3380 goto err_clear;
3381 }
3382 } else
888d04df 3383 WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, req->bss->bssid));
66e67e41
JB		 3384
3385 if (!bss->dtim_period &&
3386 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3387 /*
3388 * Wait up to one beacon interval ...
3389 * should this be more if we miss one?
3390 */
3391 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3392 sdata->name, ifmgd->bssid);
3393 assoc_data->timeout = jiffies +
3394 TU_TO_EXP_TIME(req->bss->beacon_interval);
3395 } else {
3396 assoc_data->have_beacon = true;
3397 assoc_data->sent_assoc = false;
3398 assoc_data->timeout = jiffies;
3399 }
3400 run_again(ifmgd, assoc_data->timeout);
3401
fcff4f10
PS		 3402 if (bss->corrupt_data) {
3403 char *corrupt_type = "data";
3404 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3405 if (bss->corrupt_data &
3406 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3407 corrupt_type = "beacon and probe response";
3408 else
3409 corrupt_type = "beacon";
3410 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3411 corrupt_type = "probe response";
3412 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3413 sdata->name, corrupt_type);
3414 }
3415
66e67e41
JB		 3416 err = 0;
3417 goto out;
3418 err_clear:
3419 ifmgd->assoc_data = NULL;
3420 err_free:
3421 kfree(assoc_data);
3422 out:
3423 mutex_unlock(&ifmgd->mtx);
3424
3425 return err;
f0706e82
JB		 3426}
3427
77fdaa12 3428int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3429 struct cfg80211_deauth_request *req)
f0706e82 3430{
46900298 3431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3432 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3433
77fdaa12
JB		 3434 mutex_lock(&ifmgd->mtx);
3435
37ad3888 3436 if (ifmgd->auth_data) {
66e67e41 3437 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3438 mutex_unlock(&ifmgd->mtx);
66e67e41 3439 return 0;
af6b6374 3440 }
77fdaa12 3441
37ad3888
JB		 3442 printk(KERN_DEBUG
3443 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3444 sdata->name, req->bssid, req->reason_code);
0ff71613 3445
37ad3888 3446 if (ifmgd->associated &&
888d04df 3447 compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
37ad3888 3448 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3449 req->reason_code, true, frame_buf);
37ad3888
JB		 3450 else
3451 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3452 IEEE80211_STYPE_DEAUTH,
3453 req->reason_code, true,
3454 frame_buf);
3455 mutex_unlock(&ifmgd->mtx);
3456
5fef7dbc 3457 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3458
7da7cc1d 3459 mutex_lock(&sdata->local->mtx);
bc83b681 3460 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3461 mutex_unlock(&sdata->local->mtx);
bc83b681 3462
f0706e82
JB		 3463 return 0;
3464}
84363e6e 3465
77fdaa12 3466int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3467 struct cfg80211_disassoc_request *req)
9c6bd790 3468{
77fdaa12 3469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3470 u8 bssid[ETH_ALEN];
5fef7dbc 3471 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3472
77fdaa12 3473 mutex_lock(&ifmgd->mtx);
10f644a4 3474
8d8b261a
JB		 3475 /*
3476 * cfg80211 should catch this ... but it's racy since
3477 * we can receive a disassoc frame, process it, hand it
3478 * to cfg80211 while that's in a locked section already
3479 * trying to tell us that the user wants to disconnect.
3480 */
0c1ad2ca 3481 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3482 mutex_unlock(&ifmgd->mtx);
3483 return -ENOLINK;
3484 }
3485
0ff71613 3486 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3487 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3488
e69e95db 3489 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3490 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3491 req->reason_code, !req->local_state_change,
3492 frame_buf);
77fdaa12 3493 mutex_unlock(&ifmgd->mtx);
10f644a4 3494
5fef7dbc 3495 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3496
7da7cc1d 3497 mutex_lock(&sdata->local->mtx);
bc83b681 3498 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3499 mutex_unlock(&sdata->local->mtx);
bc83b681 3500
10f644a4
JB		 3501 return 0;
3502}
026331c4 3503
54e4ffb2
JB		 3504void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3505{
3506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3507
3508 mutex_lock(&ifmgd->mtx);
3509 if (ifmgd->assoc_data)
3510 ieee80211_destroy_assoc_data(sdata, false);
3511 if (ifmgd->auth_data)
3512 ieee80211_destroy_auth_data(sdata, false);
3513 del_timer_sync(&ifmgd->timer);
3514 mutex_unlock(&ifmgd->mtx);
3515}
3516
a97c13c3
JO		 3517void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3518 enum nl80211_cqm_rssi_threshold_event rssi_event,
3519 gfp_t gfp)
3520{
3521 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3522
b5878a2d
JB		 3523 trace_api_cqm_rssi_notify(sdata, rssi_event);
3524
a97c13c3
JO		 3525 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3526}
3527EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3528
3529unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3530{
3531 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3532 return sdata->dev->operstate;
3533}
3534EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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