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NFC: Fix possible NULL ptr deref when getting the name of a socket
[mirror_ubuntu-zesty-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
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
24398e39
JB		 174static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_ht_operation *ht_oper,
176 const u8 *bssid, bool reconfig)
d5522e03
JB		 177{
178 struct ieee80211_local *local = sdata->local;
179 struct ieee80211_supported_band *sband;
d5522e03
JB		 180 struct sta_info *sta;
181 u32 changed = 0;
9ed6bcce 182 u16 ht_opmode;
64f68e5d 183 bool disable_40 = false;
d5522e03
JB		 184
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
d5522e03 186
64f68e5d
JB		 187 switch (sdata->vif.bss_conf.channel_type) {
188 case NL80211_CHAN_HT40PLUS:
189 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
190 disable_40 = true;
191 break;
192 case NL80211_CHAN_HT40MINUS:
193 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
194 disable_40 = true;
195 break;
196 default:
197 break;
198 }
d5522e03 199
24398e39
JB		 200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 202 disable_40 = true;
203
204 mutex_lock(&local->sta_mtx);
205 sta = sta_info_get(sdata, bssid);
d5522e03 206
64f68e5d
JB		 207 WARN_ON_ONCE(!sta);
208
209 if (sta && !sta->supports_40mhz)
210 disable_40 = true;
211
212 if (sta && (!reconfig ||
91a0099c 213 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 214 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 215
64f68e5d
JB		 216 if (disable_40)
217 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
218 else
219 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 220
64f68e5d 221 rate_control_rate_update(local, sband, sta,
8f727ef3 222 IEEE80211_RC_BW_CHANGED);
0aaffa9b 223 }
64f68e5d 224 mutex_unlock(&local->sta_mtx);
d5522e03 225
074d46d1 226 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 227
228 /* if bss configuration changed store the new one */
24398e39 229 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 230 changed |= BSS_CHANGED_HT;
9ed6bcce 231 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 232 }
233
234 return changed;
235}
236
9c6bd790
JB		 237/* frame sending functions */
238
66e67e41
JB		 239static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
240 struct ieee80211_supported_band *sband,
241 u32 *rates)
242{
243 int i, j, count;
244 *rates = 0;
245 count = 0;
246 for (i = 0; i < supp_rates_len; i++) {
247 int rate = (supp_rates[i] & 0x7F) * 5;
248
249 for (j = 0; j < sband->n_bitrates; j++)
250 if (sband->bitrates[j].bitrate == rate) {
251 *rates |= BIT(j);
252 count++;
253 break;
254 }
255 }
256
257 return count;
258}
259
260static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
074d46d1 261 struct sk_buff *skb, const u8 *ht_oper_ie,
66e67e41
JB		 262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
265{
074d46d1 266 struct ieee80211_ht_operation *ht_oper;
66e67e41
JB		 267 u8 *pos;
268 u32 flags = channel->flags;
269 u16 cap;
270 struct ieee80211_sta_ht_cap ht_cap;
271
272 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
273
074d46d1 274 if (!ht_oper_ie)
66e67e41
JB		 275 return;
276
074d46d1 277 if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation))
66e67e41
JB		 278 return;
279
280 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
281 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
282
074d46d1 283 ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2);
66e67e41
JB		 284
285 /* determine capability flags */
286 cap = ht_cap.cap;
287
074d46d1 288 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 289 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
290 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
291 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
292 cap &= ~IEEE80211_HT_CAP_SGI_40;
293 }
294 break;
295 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
296 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
297 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
298 cap &= ~IEEE80211_HT_CAP_SGI_40;
299 }
300 break;
301 }
302
24398e39
JB		 303 /*
304 * If 40 MHz was disabled associate as though we weren't
305 * capable of 40 MHz -- some broken APs will never fall
306 * back to trying to transmit in 20 MHz.
307 */
308 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
309 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
310 cap &= ~IEEE80211_HT_CAP_SGI_40;
311 }
312
66e67e41
JB		 313 /* set SM PS mode properly */
314 cap &= ~IEEE80211_HT_CAP_SM_PS;
315 switch (smps) {
316 case IEEE80211_SMPS_AUTOMATIC:
317 case IEEE80211_SMPS_NUM_MODES:
318 WARN_ON(1);
319 case IEEE80211_SMPS_OFF:
320 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
321 IEEE80211_HT_CAP_SM_PS_SHIFT;
322 break;
323 case IEEE80211_SMPS_STATIC:
324 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
326 break;
327 case IEEE80211_SMPS_DYNAMIC:
328 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
330 break;
331 }
332
333 /* reserve and fill IE */
334 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
335 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
336}
337
338static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
339{
340 struct ieee80211_local *local = sdata->local;
341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
342 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
343 struct sk_buff *skb;
344 struct ieee80211_mgmt *mgmt;
345 u8 *pos, qos_info;
346 size_t offset = 0, noffset;
347 int i, count, rates_len, supp_rates_len;
348 u16 capab;
349 struct ieee80211_supported_band *sband;
350 u32 rates = 0;
66e67e41
JB		 351
352 lockdep_assert_held(&ifmgd->mtx);
353
354 sband = local->hw.wiphy->bands[local->oper_channel->band];
355
356 if (assoc_data->supp_rates_len) {
357 /*
358 * Get all rates supported by the device and the AP as
359 * some APs don't like getting a superset of their rates
360 * in the association request (e.g. D-Link DAP 1353 in
361 * b-only mode)...
362 */
363 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
364 assoc_data->supp_rates_len,
365 sband, &rates);
366 } else {
367 /*
368 * In case AP not provide any supported rates information
369 * before association, we send information element(s) with
370 * all rates that we support.
371 */
372 rates = ~0;
373 rates_len = sband->n_bitrates;
374 }
375
376 skb = alloc_skb(local->hw.extra_tx_headroom +
377 sizeof(*mgmt) + /* bit too much but doesn't matter */
378 2 + assoc_data->ssid_len + /* SSID */
379 4 + rates_len + /* (extended) rates */
380 4 + /* power capability */
381 2 + 2 * sband->n_channels + /* supported channels */
382 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
383 assoc_data->ie_len + /* extra IEs */
384 9, /* WMM */
385 GFP_KERNEL);
386 if (!skb)
387 return;
388
389 skb_reserve(skb, local->hw.extra_tx_headroom);
390
391 capab = WLAN_CAPABILITY_ESS;
392
393 if (sband->band == IEEE80211_BAND_2GHZ) {
394 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
395 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
396 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
397 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
398 }
399
400 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
401 capab |= WLAN_CAPABILITY_PRIVACY;
402
403 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
404 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
405 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
406
407 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
408 memset(mgmt, 0, 24);
409 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
410 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
411 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
412
413 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
414 skb_put(skb, 10);
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_REASSOC_REQ);
417 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.reassoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
420 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
421 ETH_ALEN);
422 } else {
423 skb_put(skb, 4);
424 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
425 IEEE80211_STYPE_ASSOC_REQ);
426 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
427 mgmt->u.assoc_req.listen_interval =
428 cpu_to_le16(local->hw.conf.listen_interval);
429 }
430
431 /* SSID */
432 pos = skb_put(skb, 2 + assoc_data->ssid_len);
433 *pos++ = WLAN_EID_SSID;
434 *pos++ = assoc_data->ssid_len;
435 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
436
437 /* add all rates which were marked to be used above */
438 supp_rates_len = rates_len;
439 if (supp_rates_len > 8)
440 supp_rates_len = 8;
441
442 pos = skb_put(skb, supp_rates_len + 2);
443 *pos++ = WLAN_EID_SUPP_RATES;
444 *pos++ = supp_rates_len;
445
446 count = 0;
447 for (i = 0; i < sband->n_bitrates; i++) {
448 if (BIT(i) & rates) {
449 int rate = sband->bitrates[i].bitrate;
450 *pos++ = (u8) (rate / 5);
451 if (++count == 8)
452 break;
453 }
454 }
455
456 if (rates_len > count) {
457 pos = skb_put(skb, rates_len - count + 2);
458 *pos++ = WLAN_EID_EXT_SUPP_RATES;
459 *pos++ = rates_len - count;
460
461 for (i++; i < sband->n_bitrates; i++) {
462 if (BIT(i) & rates) {
463 int rate = sband->bitrates[i].bitrate;
464 *pos++ = (u8) (rate / 5);
465 }
466 }
467 }
468
469 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
470 /* 1. power capabilities */
471 pos = skb_put(skb, 4);
472 *pos++ = WLAN_EID_PWR_CAPABILITY;
473 *pos++ = 2;
474 *pos++ = 0; /* min tx power */
475 *pos++ = local->oper_channel->max_power; /* max tx power */
476
477 /* 2. supported channels */
478 /* TODO: get this in reg domain format */
479 pos = skb_put(skb, 2 * sband->n_channels + 2);
480 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
481 *pos++ = 2 * sband->n_channels;
482 for (i = 0; i < sband->n_channels; i++) {
483 *pos++ = ieee80211_frequency_to_channel(
484 sband->channels[i].center_freq);
485 *pos++ = 1; /* one channel in the subband*/
486 }
487 }
488
489 /* if present, add any custom IEs that go before HT */
490 if (assoc_data->ie_len && assoc_data->ie) {
491 static const u8 before_ht[] = {
492 WLAN_EID_SSID,
493 WLAN_EID_SUPP_RATES,
494 WLAN_EID_EXT_SUPP_RATES,
495 WLAN_EID_PWR_CAPABILITY,
496 WLAN_EID_SUPPORTED_CHANNELS,
497 WLAN_EID_RSN,
498 WLAN_EID_QOS_CAPA,
499 WLAN_EID_RRM_ENABLED_CAPABILITIES,
500 WLAN_EID_MOBILITY_DOMAIN,
501 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
502 };
503 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
504 before_ht, ARRAY_SIZE(before_ht),
505 offset);
506 pos = skb_put(skb, noffset - offset);
507 memcpy(pos, assoc_data->ie + offset, noffset - offset);
508 offset = noffset;
509 }
510
4e74bfdb 511 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
074d46d1 512 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie,
66e67e41
JB		 513 sband, local->oper_channel, ifmgd->ap_smps);
514
515 /* if present, add any custom non-vendor IEs that go after HT */
516 if (assoc_data->ie_len && assoc_data->ie) {
517 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
518 assoc_data->ie_len,
519 offset);
520 pos = skb_put(skb, noffset - offset);
521 memcpy(pos, assoc_data->ie + offset, noffset - offset);
522 offset = noffset;
523 }
524
76f0303d
JB		 525 if (assoc_data->wmm) {
526 if (assoc_data->uapsd) {
dc41e4d4
EP		 527 qos_info = ifmgd->uapsd_queues;
528 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 529 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
530 } else {
531 qos_info = 0;
532 }
533
534 pos = skb_put(skb, 9);
535 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
536 *pos++ = 7; /* len */
537 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
538 *pos++ = 0x50;
539 *pos++ = 0xf2;
540 *pos++ = 2; /* WME */
541 *pos++ = 0; /* WME info */
542 *pos++ = 1; /* WME ver */
543 *pos++ = qos_info;
544 }
545
546 /* add any remaining custom (i.e. vendor specific here) IEs */
547 if (assoc_data->ie_len && assoc_data->ie) {
548 noffset = assoc_data->ie_len;
549 pos = skb_put(skb, noffset - offset);
550 memcpy(pos, assoc_data->ie + offset, noffset - offset);
551 }
552
553 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
554 ieee80211_tx_skb(sdata, skb);
555}
556
ef422bc0 557static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 558 const u8 *bssid, u16 stype,
5fef7dbc
JB		 559 u16 reason, bool send_frame,
560 u8 *frame_buf)
9ac19a90
JB		 561{
562 struct ieee80211_local *local = sdata->local;
46900298 563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 564 struct sk_buff *skb;
5fef7dbc 565 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 566
5fef7dbc
JB		 567 /* build frame */
568 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
569 mgmt->duration = 0; /* initialize only */
570 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 571 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 572 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 573 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 574 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 575 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
576
5fef7dbc
JB		 577 if (send_frame) {
578 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
579 DEAUTH_DISASSOC_LEN);
580 if (!skb)
581 return;
d5cdfacb 582
5fef7dbc
JB		 583 skb_reserve(skb, local->hw.extra_tx_headroom);
584
585 /* copy in frame */
586 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
587 mgmt, DEAUTH_DISASSOC_LEN);
588
589 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
590 IEEE80211_SKB_CB(skb)->flags |=
591 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 592 ieee80211_tx_skb(sdata, skb);
5fef7dbc 593 }
9ac19a90
JB		 594}
595
572e0012
KV		 596void ieee80211_send_pspoll(struct ieee80211_local *local,
597 struct ieee80211_sub_if_data *sdata)
598{
572e0012
KV		 599 struct ieee80211_pspoll *pspoll;
600 struct sk_buff *skb;
572e0012 601
d8cd189e
KV		 602 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
603 if (!skb)
572e0012 604 return;
572e0012 605
d8cd189e
KV		 606 pspoll = (struct ieee80211_pspoll *) skb->data;
607 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 608
62ae67be
JB		 609 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
610 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 611}
612
965bedad
JB		 613void ieee80211_send_nullfunc(struct ieee80211_local *local,
614 struct ieee80211_sub_if_data *sdata,
615 int powersave)
616{
617 struct sk_buff *skb;
d8cd189e 618 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 620
d8cd189e
KV		 621 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
622 if (!skb)
965bedad 623 return;
965bedad 624
d8cd189e 625 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 626 if (powersave)
d8cd189e 627 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 628
62ae67be 629 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 630 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
631 IEEE80211_STA_CONNECTION_POLL))
632 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
633
62ae67be 634 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 635}
636
d524215f
FF		 637static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
638 struct ieee80211_sub_if_data *sdata)
639{
640 struct sk_buff *skb;
641 struct ieee80211_hdr *nullfunc;
642 __le16 fc;
643
644 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
645 return;
646
647 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 648 if (!skb)
d524215f 649 return;
d15b8459 650
d524215f
FF		 651 skb_reserve(skb, local->hw.extra_tx_headroom);
652
653 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
654 memset(nullfunc, 0, 30);
655 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
656 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
657 nullfunc->frame_control = fc;
658 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
659 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
660 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
661 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
662
663 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
664 ieee80211_tx_skb(sdata, skb);
665}
666
cc32abd4
JB		 667/* spectrum management related things */
668static void ieee80211_chswitch_work(struct work_struct *work)
669{
670 struct ieee80211_sub_if_data *sdata =
671 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
673
9607e6b6 674 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 675 return;
676
77fdaa12
JB		 677 mutex_lock(&ifmgd->mtx);
678 if (!ifmgd->associated)
679 goto out;
cc32abd4
JB		 680
681 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 682 if (!sdata->local->ops->channel_switch) {
683 /* call "hw_config" only if doing sw channel switch */
684 ieee80211_hw_config(sdata->local,
685 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 686 } else {
687 /* update the device channel directly */
688 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 689 }
77fdaa12 690
cc32abd4 691 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 692 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 693
cc32abd4
JB		 694 ieee80211_wake_queues_by_reason(&sdata->local->hw,
695 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 696 out:
697 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
698 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 699}
700
5ce6e438
JB		 701void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
702{
703 struct ieee80211_sub_if_data *sdata;
704 struct ieee80211_if_managed *ifmgd;
705
706 sdata = vif_to_sdata(vif);
707 ifmgd = &sdata->u.mgd;
708
709 trace_api_chswitch_done(sdata, success);
710 if (!success) {
711 /*
712 * If the channel switch was not successful, stay
713 * around on the old channel. We currently lack
714 * good handling of this situation, possibly we
715 * should just drop the association.
716 */
717 sdata->local->csa_channel = sdata->local->oper_channel;
718 }
719
720 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
721}
722EXPORT_SYMBOL(ieee80211_chswitch_done);
723
cc32abd4
JB		 724static void ieee80211_chswitch_timer(unsigned long data)
725{
726 struct ieee80211_sub_if_data *sdata =
727 (struct ieee80211_sub_if_data *) data;
728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
729
5bb644a0
JB		 730 if (sdata->local->quiescing) {
731 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
732 return;
733 }
734
42935eca 735 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 736}
737
738void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
739 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 740 struct ieee80211_bss *bss,
741 u64 timestamp)
cc32abd4 742{
0c1ad2ca
JB		 743 struct cfg80211_bss *cbss =
744 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 745 struct ieee80211_channel *new_ch;
746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 747 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
748 cbss->channel->band);
cc32abd4 749
77fdaa12
JB		 750 ASSERT_MGD_MTX(ifmgd);
751
752 if (!ifmgd->associated)
cc32abd4
JB		 753 return;
754
fbe9c429 755 if (sdata->local->scanning)
cc32abd4
JB		 756 return;
757
758 /* Disregard subsequent beacons if we are already running a timer
759 processing a CSA */
760
761 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
762 return;
763
764 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
765 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
766 return;
767
768 sdata->local->csa_channel = new_ch;
769
5ce6e438
JB		 770 if (sdata->local->ops->channel_switch) {
771 /* use driver's channel switch callback */
772 struct ieee80211_channel_switch ch_switch;
773 memset(&ch_switch, 0, sizeof(ch_switch));
774 ch_switch.timestamp = timestamp;
775 if (sw_elem->mode) {
776 ch_switch.block_tx = true;
777 ieee80211_stop_queues_by_reason(&sdata->local->hw,
778 IEEE80211_QUEUE_STOP_REASON_CSA);
779 }
780 ch_switch.channel = new_ch;
781 ch_switch.count = sw_elem->count;
782 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
783 drv_channel_switch(sdata->local, &ch_switch);
784 return;
785 }
786
787 /* channel switch handled in software */
cc32abd4 788 if (sw_elem->count <= 1) {
42935eca 789 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 790 } else {
9feaddc7
WYG		 791 if (sw_elem->mode)
792 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 793 IEEE80211_QUEUE_STOP_REASON_CSA);
794 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
795 mod_timer(&ifmgd->chswitch_timer,
796 jiffies +
797 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 798 cbss->beacon_interval));
cc32abd4
JB		 799 }
800}
801
802static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
803 u16 capab_info, u8 *pwr_constr_elem,
804 u8 pwr_constr_elem_len)
805{
806 struct ieee80211_conf *conf = &sdata->local->hw.conf;
807
808 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
809 return;
810
811 /* Power constraint IE length should be 1 octet */
812 if (pwr_constr_elem_len != 1)
813 return;
814
a48b13ac 815 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 816 (*pwr_constr_elem != sdata->local->power_constr_level)) {
817 sdata->local->power_constr_level = *pwr_constr_elem;
818 ieee80211_hw_config(sdata->local, 0);
819 }
820}
821
f90754c1
JO		 822void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
823{
824 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
825 struct ieee80211_local *local = sdata->local;
826 struct ieee80211_conf *conf = &local->hw.conf;
827
828 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
829 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
830 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
831
832 local->disable_dynamic_ps = false;
833 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
834}
835EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
836
837void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
838{
839 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
840 struct ieee80211_local *local = sdata->local;
841 struct ieee80211_conf *conf = &local->hw.conf;
842
843 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
844 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
845 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
846
847 local->disable_dynamic_ps = true;
848 conf->dynamic_ps_timeout = 0;
849 del_timer_sync(&local->dynamic_ps_timer);
850 ieee80211_queue_work(&local->hw,
851 &local->dynamic_ps_enable_work);
852}
853EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
854
965bedad
JB		 855/* powersave */
856static void ieee80211_enable_ps(struct ieee80211_local *local,
857 struct ieee80211_sub_if_data *sdata)
858{
859 struct ieee80211_conf *conf = &local->hw.conf;
860
d5edaedc
JB		 861 /*
862 * If we are scanning right now then the parameters will
863 * take effect when scan finishes.
864 */
fbe9c429 865 if (local->scanning)
d5edaedc
JB		 866 return;
867
965bedad
JB		 868 if (conf->dynamic_ps_timeout > 0 &&
869 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
870 mod_timer(&local->dynamic_ps_timer, jiffies +
871 msecs_to_jiffies(conf->dynamic_ps_timeout));
872 } else {
873 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
874 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 875
2a13052f
JO		 876 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
877 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
878 return;
879
880 conf->flags |= IEEE80211_CONF_PS;
881 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 882 }
883}
884
885static void ieee80211_change_ps(struct ieee80211_local *local)
886{
887 struct ieee80211_conf *conf = &local->hw.conf;
888
889 if (local->ps_sdata) {
965bedad
JB		 890 ieee80211_enable_ps(local, local->ps_sdata);
891 } else if (conf->flags & IEEE80211_CONF_PS) {
892 conf->flags &= ~IEEE80211_CONF_PS;
893 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
894 del_timer_sync(&local->dynamic_ps_timer);
895 cancel_work_sync(&local->dynamic_ps_enable_work);
896 }
897}
898
808118cb
JY		 899static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
900{
901 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
902 struct sta_info *sta = NULL;
c2c98fde 903 bool authorized = false;
808118cb
JY		 904
905 if (!mgd->powersave)
906 return false;
907
05cb9108
JB		 908 if (mgd->broken_ap)
909 return false;
910
808118cb
JY		 911 if (!mgd->associated)
912 return false;
913
914 if (!mgd->associated->beacon_ies)
915 return false;
916
917 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
918 IEEE80211_STA_CONNECTION_POLL))
919 return false;
920
921 rcu_read_lock();
922 sta = sta_info_get(sdata, mgd->bssid);
923 if (sta)
c2c98fde 924 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 925 rcu_read_unlock();
926
c2c98fde 927 return authorized;
808118cb
JY		 928}
929
965bedad 930/* need to hold RTNL or interface lock */
10f644a4 931void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 932{
933 struct ieee80211_sub_if_data *sdata, *found = NULL;
934 int count = 0;
195e294d 935 int timeout;
965bedad
JB		 936
937 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
938 local->ps_sdata = NULL;
939 return;
940 }
941
af6b6374
JB		 942 if (!list_empty(&local->work_list)) {
943 local->ps_sdata = NULL;
944 goto change;
945 }
946
965bedad 947 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 948 if (!ieee80211_sdata_running(sdata))
965bedad 949 continue;
8c7914de
RM		 950 if (sdata->vif.type == NL80211_IFTYPE_AP) {
951 /* If an AP vif is found, then disable PS
952 * by setting the count to zero thereby setting
953 * ps_sdata to NULL.
954 */
955 count = 0;
956 break;
957 }
965bedad
JB		 958 if (sdata->vif.type != NL80211_IFTYPE_STATION)
959 continue;
960 found = sdata;
961 count++;
962 }
963
808118cb 964 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 965 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 966 s32 beaconint_us;
967
968 if (latency < 0)
ed77134b 969 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 970
971 beaconint_us = ieee80211_tu_to_usec(
972 found->vif.bss_conf.beacon_int);
973
ff616381 974 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 975 if (timeout < 0) {
976 /*
ff616381
JO		 977 * Go to full PSM if the user configures a very low
978 * latency requirement.
0ab82b04
EP		 979 * The 2000 second value is there for compatibility
980 * until the PM_QOS_NETWORK_LATENCY is configured
981 * with real values.
195e294d 982 */
0ab82b04
EP		 983 if (latency > (1900 * USEC_PER_MSEC) &&
984 latency != (2000 * USEC_PER_SEC))
195e294d 985 timeout = 0;
ff616381
JO		 986 else
987 timeout = 100;
195e294d 988 }
f90754c1
JO		 989 local->dynamic_ps_user_timeout = timeout;
990 if (!local->disable_dynamic_ps)
991 conf->dynamic_ps_timeout =
992 local->dynamic_ps_user_timeout;
195e294d 993
04fe2037 994 if (beaconint_us > latency) {
10f644a4 995 local->ps_sdata = NULL;
04fe2037 996 } else {
56007a02 997 struct ieee80211_bss *bss;
04fe2037 998 int maxslp = 1;
56007a02 999 u8 dtimper;
04fe2037 1000
56007a02
JB		 1001 bss = (void *)found->u.mgd.associated->priv;
1002 dtimper = bss->dtim_period;
1003
1004 /* If the TIM IE is invalid, pretend the value is 1 */
1005 if (!dtimper)
1006 dtimper = 1;
1007 else if (dtimper > 1)
04fe2037
JB		 1008 maxslp = min_t(int, dtimper,
1009 latency / beaconint_us);
1010
9ccebe61 1011 local->hw.conf.max_sleep_period = maxslp;
56007a02 1012 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1013 local->ps_sdata = found;
04fe2037 1014 }
10f644a4 1015 } else {
965bedad 1016 local->ps_sdata = NULL;
10f644a4 1017 }
965bedad 1018
af6b6374 1019 change:
965bedad
JB		 1020 ieee80211_change_ps(local);
1021}
1022
1023void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1024{
1025 struct ieee80211_local *local =
1026 container_of(work, struct ieee80211_local,
1027 dynamic_ps_disable_work);
1028
1029 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1030 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1031 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1032 }
1033
1034 ieee80211_wake_queues_by_reason(&local->hw,
1035 IEEE80211_QUEUE_STOP_REASON_PS);
1036}
1037
1038void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1039{
1040 struct ieee80211_local *local =
1041 container_of(work, struct ieee80211_local,
1042 dynamic_ps_enable_work);
1043 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1044 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1045 unsigned long flags;
1046 int q;
965bedad
JB		 1047
1048 /* can only happen when PS was just disabled anyway */
1049 if (!sdata)
1050 return;
1051
5e34069c
CL		 1052 ifmgd = &sdata->u.mgd;
1053
965bedad
JB		 1054 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1055 return;
1056
77b7023a
AN		 1057 if (!local->disable_dynamic_ps &&
1058 local->hw.conf.dynamic_ps_timeout > 0) {
1059 /* don't enter PS if TX frames are pending */
1060 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1061 mod_timer(&local->dynamic_ps_timer, jiffies +
1062 msecs_to_jiffies(
1063 local->hw.conf.dynamic_ps_timeout));
1064 return;
1065 }
77b7023a
AN		 1066
1067 /*
1068 * transmission can be stopped by others which leads to
1069 * dynamic_ps_timer expiry. Postpone the ps timer if it
1070 * is not the actual idle state.
1071 */
1072 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1073 for (q = 0; q < local->hw.queues; q++) {
1074 if (local->queue_stop_reasons[q]) {
1075 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1076 flags);
1077 mod_timer(&local->dynamic_ps_timer, jiffies +
1078 msecs_to_jiffies(
1079 local->hw.conf.dynamic_ps_timeout));
1080 return;
1081 }
1082 }
1083 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1084 }
1ddc2867 1085
375177bf 1086 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1087 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1088 netif_tx_stop_all_queues(sdata->dev);
965bedad 1089
e8306f98
VN		 1090 if (drv_tx_frames_pending(local))
1091 mod_timer(&local->dynamic_ps_timer, jiffies +
1092 msecs_to_jiffies(
1093 local->hw.conf.dynamic_ps_timeout));
1094 else {
1095 ieee80211_send_nullfunc(local, sdata, 1);
1096 /* Flush to get the tx status of nullfunc frame */
1097 drv_flush(local, false);
1098 }
f3e85b9e
VN		 1099 }
1100
2a13052f
JO		 1101 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1102 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1103 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1104 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1105 local->hw.conf.flags |= IEEE80211_CONF_PS;
1106 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1107 }
f3e85b9e 1108
77b7023a
AN		 1109 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1110 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1111}
1112
1113void ieee80211_dynamic_ps_timer(unsigned long data)
1114{
1115 struct ieee80211_local *local = (void *) data;
1116
78f1a8b7 1117 if (local->quiescing || local->suspended)
5bb644a0
JB		 1118 return;
1119
42935eca 1120 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1121}
1122
60f8b39c 1123/* MLME */
f698d856 1124static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1125 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1126 u8 *wmm_param, size_t wmm_param_len)
1127{
f0706e82 1128 struct ieee80211_tx_queue_params params;
4ced3f74 1129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1130 size_t left;
1131 int count;
ab13315a 1132 u8 *pos, uapsd_queues = 0;
f0706e82 1133
e1b3ec1a
SG		 1134 if (!local->ops->conf_tx)
1135 return;
1136
32c5057b 1137 if (local->hw.queues < IEEE80211_NUM_ACS)
3434fbd3
JB		 1138 return;
1139
1140 if (!wmm_param)
1141 return;
1142
f0706e82
JB		 1143 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1144 return;
ab13315a
KV		 1145
1146 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1147 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1148
f0706e82 1149 count = wmm_param[6] & 0x0f;
46900298 1150 if (count == ifmgd->wmm_last_param_set)
f0706e82 1151 return;
46900298 1152 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1153
1154 pos = wmm_param + 8;
1155 left = wmm_param_len - 8;
1156
1157 memset(&params, 0, sizeof(params));
1158
f0706e82
JB		 1159 local->wmm_acm = 0;
1160 for (; left >= 4; left -= 4, pos += 4) {
1161 int aci = (pos[0] >> 5) & 0x03;
1162 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1163 bool uapsd = false;
f0706e82
JB		 1164 int queue;
1165
1166 switch (aci) {
0eeb59fe 1167 case 1: /* AC_BK */
e100bb64 1168 queue = 3;
988c0f72 1169 if (acm)
0eeb59fe 1170 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1171 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1172 uapsd = true;
f0706e82 1173 break;
0eeb59fe 1174 case 2: /* AC_VI */
e100bb64 1175 queue = 1;
988c0f72 1176 if (acm)
0eeb59fe 1177 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1178 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1179 uapsd = true;
f0706e82 1180 break;
0eeb59fe 1181 case 3: /* AC_VO */
e100bb64 1182 queue = 0;
988c0f72 1183 if (acm)
0eeb59fe 1184 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1185 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1186 uapsd = true;
f0706e82 1187 break;
0eeb59fe 1188 case 0: /* AC_BE */
f0706e82 1189 default:
e100bb64 1190 queue = 2;
988c0f72 1191 if (acm)
0eeb59fe 1192 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1193 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1194 uapsd = true;
f0706e82
JB		 1195 break;
1196 }
1197
1198 params.aifs = pos[0] & 0x0f;
1199 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1200 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1201 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1202 params.uapsd = uapsd;
1203
f4ea83dd 1204#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1205 wiphy_debug(local->hw.wiphy,
1206 "WMM queue=%d aci=%d acm=%d aifs=%d "
1207 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1208 queue, aci, acm,
1209 params.aifs, params.cw_min, params.cw_max,
1210 params.txop, params.uapsd);
3330d7be 1211#endif
f6f3def3
EP		 1212 sdata->tx_conf[queue] = params;
1213 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1214 wiphy_debug(local->hw.wiphy,
1215 "failed to set TX queue parameters for queue %d\n",
1216 queue);
f0706e82 1217 }
e1b3ec1a
SG		 1218
1219 /* enable WMM or activate new settings */
4ced3f74 1220 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1221}
1222
925e64c3
SG		 1223static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1224{
1225 lockdep_assert_held(&sdata->local->mtx);
1226
1227 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1228 IEEE80211_STA_BEACON_POLL);
1229 ieee80211_run_deferred_scan(sdata->local);
1230}
1231
1232static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1233{
1234 mutex_lock(&sdata->local->mtx);
1235 __ieee80211_stop_poll(sdata);
1236 mutex_unlock(&sdata->local->mtx);
1237}
1238
7a5158ef
JB		 1239static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1240 u16 capab, bool erp_valid, u8 erp)
5628221c 1241{
bda3933a 1242 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1243 u32 changed = 0;
7a5158ef
JB		 1244 bool use_protection;
1245 bool use_short_preamble;
1246 bool use_short_slot;
1247
1248 if (erp_valid) {
1249 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1250 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1251 } else {
1252 use_protection = false;
1253 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1254 }
1255
1256 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1257 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1258 use_short_slot = true;
5628221c 1259
471b3efd 1260 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1261 bss_conf->use_cts_prot = use_protection;
1262 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1263 }
7e9ed188 1264
d43c7b37 1265 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1266 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1267 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1268 }
d9430a32 1269
7a5158ef 1270 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1271 bss_conf->use_short_slot = use_short_slot;
1272 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1273 }
1274
1275 return changed;
1276}
1277
f698d856 1278static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1279 struct cfg80211_bss *cbss,
ae5eb026 1280 u32 bss_info_changed)
f0706e82 1281{
0c1ad2ca 1282 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1283 struct ieee80211_local *local = sdata->local;
68542962 1284 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1285
ae5eb026 1286 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1287 /* set timing information */
68542962 1288 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1289 bss_conf->last_tsf = cbss->tsf;
5628221c 1290
77fdaa12
JB		 1291 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1292 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1293 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1294
7ccc8bd7
FF		 1295 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1296 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1297
0c1ad2ca
JB		 1298 sdata->u.mgd.associated = cbss;
1299 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1300
17e4ec14
JM		 1301 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1302
b291ba11 1303 /* just to be sure */
925e64c3 1304 ieee80211_stop_poll(sdata);
b291ba11 1305
9ac19a90 1306 ieee80211_led_assoc(local, 1);
9306102e 1307
e5b900d2
JB		 1308 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1309 bss_conf->dtim_period = bss->dtim_period;
1310 else
1311 bss_conf->dtim_period = 0;
1312
68542962 1313 bss_conf->assoc = 1;
9cef8737 1314
a97c13c3 1315 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1316 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1317 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1318 bss_info_changed |= BSS_CHANGED_CQM;
1319
68542962
JO		 1320 /* Enable ARP filtering */
1321 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1322 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1323 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1324 }
1325
ae5eb026 1326 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1327
056508dc
JB		 1328 mutex_lock(&local->iflist_mtx);
1329 ieee80211_recalc_ps(local, -1);
025e6be2 1330 ieee80211_recalc_smps(local);
056508dc 1331 mutex_unlock(&local->iflist_mtx);
e0cb686f 1332
8a5b33f5 1333 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1334 netif_carrier_on(sdata->dev);
f0706e82
JB		 1335}
1336
e69e95db 1337static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1338 u16 stype, u16 reason, bool tx,
1339 u8 *frame_buf)
aa458d17 1340{
46900298 1341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1342 struct ieee80211_local *local = sdata->local;
1343 struct sta_info *sta;
3cc5240b 1344 u32 changed = 0;
b291ba11 1345 u8 bssid[ETH_ALEN];
aa458d17 1346
77fdaa12
JB		 1347 ASSERT_MGD_MTX(ifmgd);
1348
37ad3888
JB		 1349 if (WARN_ON_ONCE(tx && !frame_buf))
1350 return;
1351
b291ba11
JB		 1352 if (WARN_ON(!ifmgd->associated))
1353 return;
1354
0c1ad2ca 1355 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1356
77fdaa12
JB		 1357 ifmgd->associated = NULL;
1358 memset(ifmgd->bssid, 0, ETH_ALEN);
1359
1360 /*
1361 * we need to commit the associated = NULL change because the
1362 * scan code uses that to determine whether this iface should
1363 * go to/wake up from powersave or not -- and could otherwise
1364 * wake the queues erroneously.
1365 */
1366 smp_mb();
1367
1368 /*
1369 * Thus, we can only afterwards stop the queues -- to account
1370 * for the case where another CPU is finishing a scan at this
1371 * time -- we don't want the scan code to enable queues.
1372 */
aa458d17 1373
8a5b33f5 1374 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1375 netif_carrier_off(sdata->dev);
1376
2a419056 1377 mutex_lock(&local->sta_mtx);
abe60632 1378 sta = sta_info_get(sdata, bssid);
4cad6c7c 1379 if (sta) {
c2c98fde 1380 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1381 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1382 }
2a419056 1383 mutex_unlock(&local->sta_mtx);
aa458d17 1384
37ad3888
JB		 1385 /* deauthenticate/disassociate now */
1386 if (tx || frame_buf)
1387 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1388 tx, frame_buf);
1389
1390 /* flush out frame */
1391 if (tx)
1392 drv_flush(local, false);
1393
1394 /* remove AP and TDLS peers */
1395 sta_info_flush(local, sdata);
1396
1397 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1398 changed |= ieee80211_reset_erp_info(sdata);
1399
f5e5bf25 1400 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1401 changed |= BSS_CHANGED_ASSOC;
1402 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1403
413ad50a 1404 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1405 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1406 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1407
a8302de9
VT		 1408 local->power_constr_level = 0;
1409
520eb820
KV		 1410 del_timer_sync(&local->dynamic_ps_timer);
1411 cancel_work_sync(&local->dynamic_ps_enable_work);
1412
e0cb686f
KV		 1413 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1414 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1415 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1416 }
a331400b 1417 local->ps_sdata = NULL;
ae5eb026 1418
68542962
JO		 1419 /* Disable ARP filtering */
1420 if (sdata->vif.bss_conf.arp_filter_enabled) {
1421 sdata->vif.bss_conf.arp_filter_enabled = false;
1422 changed |= BSS_CHANGED_ARP_FILTER;
1423 }
1424
3abead59
JB		 1425 sdata->vif.bss_conf.qos = false;
1426 changed |= BSS_CHANGED_QOS;
1427
0aaffa9b
JB		 1428 /* The BSSID (not really interesting) and HT changed */
1429 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1430 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1431
3cc5240b
JB		 1432 /* channel(_type) changes are handled by ieee80211_hw_config */
1433 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1434 ieee80211_hw_config(local, 0);
1435
3abead59
JB		 1436 /* disassociated - set to defaults now */
1437 ieee80211_set_wmm_default(sdata, false);
1438
b9dcf712
JB		 1439 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1440 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1441 del_timer_sync(&sdata->u.mgd.timer);
1442 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1443}
f0706e82 1444
3cf335d5
KV		 1445void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1446 struct ieee80211_hdr *hdr)
1447{
1448 /*
1449 * We can postpone the mgd.timer whenever receiving unicast frames
1450 * from AP because we know that the connection is working both ways
1451 * at that time. But multicast frames (and hence also beacons) must
1452 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1453 * data idle periods for sending the periodic probe request to the
1454 * AP we're connected to.
3cf335d5 1455 */
b291ba11
JB		 1456 if (is_multicast_ether_addr(hdr->addr1))
1457 return;
1458
be099e82 1459 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1460}
f0706e82 1461
4e5ff376
FF		 1462static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1463{
1464 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1465 struct ieee80211_local *local = sdata->local;
4e5ff376 1466
133d40f9 1467 mutex_lock(&local->mtx);
4e5ff376 1468 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1469 IEEE80211_STA_CONNECTION_POLL))) {
1470 mutex_unlock(&local->mtx);
1471 return;
1472 }
4e5ff376 1473
925e64c3 1474 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1475
1476 mutex_lock(&local->iflist_mtx);
1477 ieee80211_recalc_ps(local, -1);
1478 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1479
1480 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1481 goto out;
4e5ff376
FF		 1482
1483 /*
1484 * We've received a probe response, but are not sure whether
1485 * we have or will be receiving any beacons or data, so let's
1486 * schedule the timers again, just in case.
1487 */
1488 ieee80211_sta_reset_beacon_monitor(sdata);
1489
1490 mod_timer(&ifmgd->conn_mon_timer,
1491 round_jiffies_up(jiffies +
1492 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1493out:
133d40f9 1494 mutex_unlock(&local->mtx);
4e5ff376
FF		 1495}
1496
1497void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1498 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1499{
75706d0e 1500 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1501 return;
1502
04ac3c0e
FF		 1503 if (ack)
1504 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1505
1506 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1507 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1508 if (ack)
1509 sdata->u.mgd.probe_send_count = 0;
1510 else
1511 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1512 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1513 }
1514}
1515
a43abf29
ML		 1516static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1517{
1518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1519 const u8 *ssid;
f01a067d 1520 u8 *dst = ifmgd->associated->bssid;
180205bd 1521 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1522
1523 /*
1524 * Try sending broadcast probe requests for the last three
1525 * probe requests after the first ones failed since some
1526 * buggy APs only support broadcast probe requests.
1527 */
1528 if (ifmgd->probe_send_count >= unicast_limit)
1529 dst = NULL;
a43abf29 1530
4e5ff376
FF		 1531 /*
1532 * When the hardware reports an accurate Tx ACK status, it's
1533 * better to send a nullfunc frame instead of a probe request,
1534 * as it will kick us off the AP quickly if we aren't associated
1535 * anymore. The timeout will be reset if the frame is ACKed by
1536 * the AP.
1537 */
992e68bf
SD		 1538 ifmgd->probe_send_count++;
1539
04ac3c0e
FF		 1540 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1541 ifmgd->nullfunc_failed = false;
4e5ff376 1542 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1543 } else {
88c868c4
SG		 1544 int ssid_len;
1545
4e5ff376 1546 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1547 if (WARN_ON_ONCE(ssid == NULL))
1548 ssid_len = 0;
1549 else
1550 ssid_len = ssid[1];
1551
1552 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1553 0, (u32) -1, true, false);
4e5ff376 1554 }
a43abf29 1555
180205bd 1556 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1557 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1558 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1559 drv_flush(sdata->local, false);
a43abf29
ML		 1560}
1561
b291ba11
JB		 1562static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1563 bool beacon)
04de8381 1564{
04de8381 1565 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1566 bool already = false;
34bfc411 1567
9607e6b6 1568 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1569 return;
1570
77fdaa12
JB		 1571 mutex_lock(&ifmgd->mtx);
1572
1573 if (!ifmgd->associated)
1574 goto out;
1575
133d40f9
SG		 1576 mutex_lock(&sdata->local->mtx);
1577
1578 if (sdata->local->tmp_channel || sdata->local->scanning) {
1579 mutex_unlock(&sdata->local->mtx);
1580 goto out;
1581 }
1582
a860402d 1583#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 1584 if (beacon)
1585 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1586 sdata->name);
a860402d 1587#endif
04de8381 1588
b291ba11
JB		 1589 /*
1590 * The driver/our work has already reported this event or the
1591 * connection monitoring has kicked in and we have already sent
1592 * a probe request. Or maybe the AP died and the driver keeps
1593 * reporting until we disassociate...
1594 *
1595 * In either case we have to ignore the current call to this
1596 * function (except for setting the correct probe reason bit)
1597 * because otherwise we would reset the timer every time and
1598 * never check whether we received a probe response!
1599 */
1600 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1601 IEEE80211_STA_CONNECTION_POLL))
1602 already = true;
1603
1604 if (beacon)
1605 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1606 else
1607 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1608
133d40f9
SG		 1609 mutex_unlock(&sdata->local->mtx);
1610
b291ba11
JB		 1611 if (already)
1612 goto out;
1613
4e751843
JB		 1614 mutex_lock(&sdata->local->iflist_mtx);
1615 ieee80211_recalc_ps(sdata->local, -1);
1616 mutex_unlock(&sdata->local->iflist_mtx);
1617
a43abf29
ML		 1618 ifmgd->probe_send_count = 0;
1619 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1620 out:
1621 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1622}
1623
a619a4c0
JO		 1624struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1625 struct ieee80211_vif *vif)
1626{
1627 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1629 struct sk_buff *skb;
1630 const u8 *ssid;
88c868c4 1631 int ssid_len;
a619a4c0
JO		 1632
1633 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1634 return NULL;
1635
1636 ASSERT_MGD_MTX(ifmgd);
1637
1638 if (!ifmgd->associated)
1639 return NULL;
1640
1641 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1642 if (WARN_ON_ONCE(ssid == NULL))
1643 ssid_len = 0;
1644 else
1645 ssid_len = ssid[1];
1646
a619a4c0 1647 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
88c868c4 1648 (u32) -1, ssid + 2, ssid_len,
85a237fe 1649 NULL, 0, true);
a619a4c0
JO		 1650
1651 return skb;
1652}
1653EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1654
1e4dcd01
JO		 1655static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1656{
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1658 struct ieee80211_local *local = sdata->local;
1659 u8 bssid[ETH_ALEN];
5fef7dbc 1660 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1661
1662 mutex_lock(&ifmgd->mtx);
1663 if (!ifmgd->associated) {
1664 mutex_unlock(&ifmgd->mtx);
1665 return;
1666 }
1667
1668 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1669
180205bd
BG		 1670 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1671 sdata->name, bssid);
1e4dcd01 1672
37ad3888
JB		 1673 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1674 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1675 false, frame_buf);
1e4dcd01 1676 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1677
1e4dcd01
JO		 1678 /*
1679 * must be outside lock due to cfg80211,
1680 * but that's not a problem.
1681 */
5fef7dbc 1682 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1683
1684 mutex_lock(&local->mtx);
1685 ieee80211_recalc_idle(local);
1686 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1687}
1688
1689void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1690{
1691 struct ieee80211_sub_if_data *sdata =
1692 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1693 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1694 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1695 struct sta_info *sta;
1696
1697 if (ifmgd->associated) {
30fa9047 1698 rcu_read_lock();
a85e1d55
PS		 1699 sta = sta_info_get(sdata, ifmgd->bssid);
1700 if (sta)
1701 sta->beacon_loss_count++;
30fa9047 1702 rcu_read_unlock();
a85e1d55 1703 }
b291ba11 1704
1e4dcd01
JO		 1705 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1706 __ieee80211_connection_loss(sdata);
1707 else
1708 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1709}
1710
04de8381
KV		 1711void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1712{
1713 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1714 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1715
b5878a2d
JB		 1716 trace_api_beacon_loss(sdata);
1717
1e4dcd01
JO		 1718 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1719 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1720}
1721EXPORT_SYMBOL(ieee80211_beacon_loss);
1722
1e4dcd01
JO		 1723void ieee80211_connection_loss(struct ieee80211_vif *vif)
1724{
1725 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1726 struct ieee80211_hw *hw = &sdata->local->hw;
1727
b5878a2d
JB		 1728 trace_api_connection_loss(sdata);
1729
1e4dcd01
JO		 1730 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1731 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1732}
1733EXPORT_SYMBOL(ieee80211_connection_loss);
1734
1735
66e67e41
JB		 1736static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1737 bool assoc)
1738{
1739 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1740
1741 lockdep_assert_held(&sdata->u.mgd.mtx);
1742
66e67e41
JB		 1743 if (!assoc) {
1744 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1745
1746 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1747 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1748 }
1749
1750 cfg80211_put_bss(auth_data->bss);
1751 kfree(auth_data);
1752 sdata->u.mgd.auth_data = NULL;
1753}
1754
1755static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1756 struct ieee80211_mgmt *mgmt, size_t len)
1757{
1758 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1759 u8 *pos;
1760 struct ieee802_11_elems elems;
1761
1762 pos = mgmt->u.auth.variable;
1763 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1764 if (!elems.challenge)
1765 return;
1766 auth_data->expected_transaction = 4;
1767 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1768 elems.challenge - 2, elems.challenge_len + 2,
1769 auth_data->bss->bssid, auth_data->bss->bssid,
1770 auth_data->key, auth_data->key_len,
1771 auth_data->key_idx);
1772}
1773
1774static enum rx_mgmt_action __must_check
1775ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1776 struct ieee80211_mgmt *mgmt, size_t len)
1777{
1778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1779 u8 bssid[ETH_ALEN];
1780 u16 auth_alg, auth_transaction, status_code;
1781 struct sta_info *sta;
1782
1783 lockdep_assert_held(&ifmgd->mtx);
1784
1785 if (len < 24 + 6)
1786 return RX_MGMT_NONE;
1787
1788 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1789 return RX_MGMT_NONE;
1790
1791 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1792
b203ca39 1793 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1794 return RX_MGMT_NONE;
1795
1796 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1797 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1798 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1799
1800 if (auth_alg != ifmgd->auth_data->algorithm ||
1801 auth_transaction != ifmgd->auth_data->expected_transaction)
1802 return RX_MGMT_NONE;
1803
1804 if (status_code != WLAN_STATUS_SUCCESS) {
1805 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1806 sdata->name, mgmt->sa, status_code);
1807 goto out;
1808 }
1809
1810 switch (ifmgd->auth_data->algorithm) {
1811 case WLAN_AUTH_OPEN:
1812 case WLAN_AUTH_LEAP:
1813 case WLAN_AUTH_FT:
1814 break;
1815 case WLAN_AUTH_SHARED_KEY:
1816 if (ifmgd->auth_data->expected_transaction != 4) {
1817 ieee80211_auth_challenge(sdata, mgmt, len);
1818 /* need another frame */
1819 return RX_MGMT_NONE;
1820 }
1821 break;
1822 default:
1823 WARN_ONCE(1, "invalid auth alg %d",
1824 ifmgd->auth_data->algorithm);
1825 return RX_MGMT_NONE;
1826 }
1827
1828 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1829 out:
66e67e41
JB		 1830 ifmgd->auth_data->done = true;
1831 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1832 run_again(ifmgd, ifmgd->auth_data->timeout);
1833
1834 /* move station state to auth */
1835 mutex_lock(&sdata->local->sta_mtx);
1836 sta = sta_info_get(sdata, bssid);
1837 if (!sta) {
1838 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1839 goto out_err;
1840 }
1841 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1842 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1843 sdata->name, bssid);
1844 goto out_err;
1845 }
1846 mutex_unlock(&sdata->local->sta_mtx);
1847
1848 return RX_MGMT_CFG80211_RX_AUTH;
1849 out_err:
1850 mutex_unlock(&sdata->local->sta_mtx);
1851 /* ignore frame -- wait for timeout */
1852 return RX_MGMT_NONE;
1853}
1854
1855
77fdaa12
JB		 1856static enum rx_mgmt_action __must_check
1857ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1858 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1859{
46900298 1860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1861 const u8 *bssid = NULL;
f0706e82
JB		 1862 u16 reason_code;
1863
66e67e41
JB		 1864 lockdep_assert_held(&ifmgd->mtx);
1865
f4ea83dd 1866 if (len < 24 + 2)
77fdaa12 1867 return RX_MGMT_NONE;
f0706e82 1868
66e67e41 1869 if (!ifmgd->associated ||
b203ca39 1870 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1871 return RX_MGMT_NONE;
77fdaa12 1872
0c1ad2ca 1873 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1874
1875 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1876
77fdaa12 1877 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1878 sdata->name, bssid, reason_code);
77fdaa12 1879
37ad3888
JB		 1880 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1881
7da7cc1d 1882 mutex_lock(&sdata->local->mtx);
63f170e0 1883 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1884 mutex_unlock(&sdata->local->mtx);
f0706e82 1885
77fdaa12 1886 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1887}
1888
1889
77fdaa12
JB		 1890static enum rx_mgmt_action __must_check
1891ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1892 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1893{
46900298 1894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1895 u16 reason_code;
1896
66e67e41 1897 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1898
66e67e41 1899 if (len < 24 + 2)
77fdaa12
JB		 1900 return RX_MGMT_NONE;
1901
66e67e41 1902 if (!ifmgd->associated ||
b203ca39 1903 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1904 return RX_MGMT_NONE;
f0706e82
JB		 1905
1906 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1907
0ff71613 1908 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1909 sdata->name, mgmt->sa, reason_code);
f0706e82 1910
37ad3888
JB		 1911 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1912
7da7cc1d 1913 mutex_lock(&sdata->local->mtx);
bc83b681 1914 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1915 mutex_unlock(&sdata->local->mtx);
37ad3888 1916
77fdaa12 1917 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1918}
1919
c74d084f
CL		 1920static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1921 u8 *supp_rates, unsigned int supp_rates_len,
1922 u32 *rates, u32 *basic_rates,
1923 bool *have_higher_than_11mbit,
1924 int *min_rate, int *min_rate_index)
1925{
1926 int i, j;
1927
1928 for (i = 0; i < supp_rates_len; i++) {
1929 int rate = (supp_rates[i] & 0x7f) * 5;
1930 bool is_basic = !!(supp_rates[i] & 0x80);
1931
1932 if (rate > 110)
1933 *have_higher_than_11mbit = true;
1934
1935 /*
1936 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1937 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1938 *
1939 * Note: Even through the membership selector and the basic
1940 * rate flag share the same bit, they are not exactly
1941 * the same.
1942 */
1943 if (!!(supp_rates[i] & 0x80) &&
1944 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1945 continue;
1946
1947 for (j = 0; j < sband->n_bitrates; j++) {
1948 if (sband->bitrates[j].bitrate == rate) {
1949 *rates |= BIT(j);
1950 if (is_basic)
1951 *basic_rates |= BIT(j);
1952 if (rate < *min_rate) {
1953 *min_rate = rate;
1954 *min_rate_index = j;
1955 }
1956 break;
1957 }
1958 }
1959 }
1960}
f0706e82 1961
66e67e41
JB		 1962static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1963 bool assoc)
1964{
1965 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1966
1967 lockdep_assert_held(&sdata->u.mgd.mtx);
1968
66e67e41
JB		 1969 if (!assoc) {
1970 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1971
1972 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1973 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1974 }
1975
1976 kfree(assoc_data);
1977 sdata->u.mgd.assoc_data = NULL;
1978}
1979
1980static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1981 struct cfg80211_bss *cbss,
af6b6374 1982 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1983{
46900298 1984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1985 struct ieee80211_local *local = sdata->local;
8318d78a 1986 struct ieee80211_supported_band *sband;
f0706e82 1987 struct sta_info *sta;
af6b6374 1988 u8 *pos;
af6b6374 1989 u16 capab_info, aid;
f0706e82 1990 struct ieee802_11_elems elems;
bda3933a 1991 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1992 u32 changed = 0;
c74d084f 1993 int err;
f0706e82 1994
af6b6374 1995 /* AssocResp and ReassocResp have identical structure */
f0706e82 1996
f0706e82 1997 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1998 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1999
1dd84aa2 2000 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 2001 printk(KERN_DEBUG
2002 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2003 sdata->name, aid);
1dd84aa2
JB		 2004 aid &= ~(BIT(15) | BIT(14));
2005
05cb9108
JB		 2006 ifmgd->broken_ap = false;
2007
2008 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2009 printk(KERN_DEBUG
2010 "%s: invalid AID value %d (out of range), turn off PS\n",
2011 sdata->name, aid);
2012 aid = 0;
2013 ifmgd->broken_ap = true;
2014 }
2015
af6b6374
JB		 2016 pos = mgmt->u.assoc_resp.variable;
2017 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2018
f0706e82
JB		 2019 if (!elems.supp_rates) {
2020 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 2021 sdata->name);
af6b6374 2022 return false;
f0706e82
JB		 2023 }
2024
46900298 2025 ifmgd->aid = aid;
f0706e82 2026
2a33bee2
GE		 2027 mutex_lock(&sdata->local->sta_mtx);
2028 /*
2029 * station info was already allocated and inserted before
2030 * the association and should be available to us
2031 */
7852e361 2032 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2033 if (WARN_ON(!sta)) {
2034 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2035 return false;
77fdaa12 2036 }
05e5e883 2037
66e67e41 2038 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2039
ab1faead 2040 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2041 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2042 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2043
64f68e5d
JB		 2044 sta->supports_40mhz =
2045 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2046
4b7679a5 2047 rate_control_rate_init(sta);
f0706e82 2048
46900298 2049 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2050 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2051
ddf4ac53 2052 if (elems.wmm_param)
c2c98fde 2053 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2054
c8987876
JB		 2055 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2056 if (!err)
2057 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2058 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2059 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2060 if (err) {
2061 printk(KERN_DEBUG
2062 "%s: failed to move station %pM to desired state\n",
2063 sdata->name, sta->sta.addr);
2064 WARN_ON(__sta_info_destroy(sta));
2065 mutex_unlock(&sdata->local->sta_mtx);
2066 return false;
2067 }
2068
7852e361 2069 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2070
f2176d72
JO		 2071 /*
2072 * Always handle WMM once after association regardless
2073 * of the first value the AP uses. Setting -1 here has
2074 * that effect because the AP values is an unsigned
2075 * 4-bit value.
2076 */
2077 ifmgd->wmm_last_param_set = -1;
2078
ddf4ac53 2079 if (elems.wmm_param)
4ced3f74 2080 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2081 elems.wmm_param_len);
aa837e1d 2082 else
3abead59
JB		 2083 ieee80211_set_wmm_default(sdata, false);
2084 changed |= BSS_CHANGED_QOS;
f0706e82 2085
074d46d1 2086 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2087 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2088 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2089 cbss->bssid, false);
ae5eb026 2090
60f8b39c
JB		 2091 /* set AID and assoc capability,
2092 * ieee80211_set_associated() will tell the driver */
2093 bss_conf->aid = aid;
2094 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2095 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2096
d524215f
FF		 2097 /*
2098 * If we're using 4-addr mode, let the AP know that we're
2099 * doing so, so that it can create the STA VLAN on its side
2100 */
2101 if (ifmgd->use_4addr)
2102 ieee80211_send_4addr_nullfunc(local, sdata);
2103
15b7b062 2104 /*
b291ba11
JB		 2105 * Start timer to probe the connection to the AP now.
2106 * Also start the timer that will detect beacon loss.
15b7b062 2107 */
b291ba11 2108 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2109 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2110
af6b6374 2111 return true;
f0706e82
JB		 2112}
2113
66e67e41
JB		 2114static enum rx_mgmt_action __must_check
2115ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2116 struct ieee80211_mgmt *mgmt, size_t len,
2117 struct cfg80211_bss **bss)
2118{
2119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2120 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2121 u16 capab_info, status_code, aid;
2122 struct ieee802_11_elems elems;
2123 u8 *pos;
2124 bool reassoc;
2125
2126 lockdep_assert_held(&ifmgd->mtx);
2127
2128 if (!assoc_data)
2129 return RX_MGMT_NONE;
b203ca39 2130 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2131 return RX_MGMT_NONE;
2132
2133 /*
2134 * AssocResp and ReassocResp have identical structure, so process both
2135 * of them in this function.
2136 */
2137
2138 if (len < 24 + 6)
2139 return RX_MGMT_NONE;
2140
2141 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2142 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2143 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2144 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2145
2146 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2147 "status=%d aid=%d)\n",
2148 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2149 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2150
2151 pos = mgmt->u.assoc_resp.variable;
2152 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2153
2154 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2155 elems.timeout_int && elems.timeout_int_len == 5 &&
2156 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2157 u32 tu, ms;
2158 tu = get_unaligned_le32(elems.timeout_int + 1);
2159 ms = tu * 1024 / 1000;
2160 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2161 "comeback duration %u TU (%u ms)\n",
2162 sdata->name, mgmt->sa, tu, ms);
2163 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2164 if (ms > IEEE80211_ASSOC_TIMEOUT)
2165 run_again(ifmgd, assoc_data->timeout);
2166 return RX_MGMT_NONE;
2167 }
2168
2169 *bss = assoc_data->bss;
2170
2171 if (status_code != WLAN_STATUS_SUCCESS) {
2172 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2173 sdata->name, mgmt->sa, status_code);
2174 ieee80211_destroy_assoc_data(sdata, false);
2175 } else {
2176 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2177
66e67e41
JB		 2178 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2179 /* oops -- internal error -- send timeout for now */
79ebfb85 2180 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2181 sta_info_destroy_addr(sdata, mgmt->bssid);
2182 cfg80211_put_bss(*bss);
2183 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2184 }
79ebfb85
JB		 2185
2186 /*
2187 * destroy assoc_data afterwards, as otherwise an idle
2188 * recalc after assoc_data is NULL but before associated
2189 * is set can cause the interface to go idle
2190 */
2191 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2192 }
2193
2194 return RX_MGMT_CFG80211_RX_ASSOC;
2195}
98c8fccf
JB		 2196static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2197 struct ieee80211_mgmt *mgmt,
2198 size_t len,
2199 struct ieee80211_rx_status *rx_status,
2200 struct ieee802_11_elems *elems,
2201 bool beacon)
2202{
2203 struct ieee80211_local *local = sdata->local;
2204 int freq;
c2b13452 2205 struct ieee80211_bss *bss;
98c8fccf 2206 struct ieee80211_channel *channel;
56007a02
JB		 2207 bool need_ps = false;
2208
66e67e41 2209 if (sdata->u.mgd.associated &&
b203ca39 2210 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2211 bss = (void *)sdata->u.mgd.associated->priv;
2212 /* not previously set so we may need to recalc */
2213 need_ps = !bss->dtim_period;
2214 }
98c8fccf
JB		 2215
2216 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2217 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2218 rx_status->band);
98c8fccf
JB		 2219 else
2220 freq = rx_status->freq;
2221
2222 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2223
2224 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2225 return;
2226
98c8fccf 2227 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2228 channel, beacon);
77fdaa12
JB		 2229 if (bss)
2230 ieee80211_rx_bss_put(local, bss);
2231
2232 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2233 return;
2234
56007a02
JB		 2235 if (need_ps) {
2236 mutex_lock(&local->iflist_mtx);
2237 ieee80211_recalc_ps(local, -1);
2238 mutex_unlock(&local->iflist_mtx);
2239 }
2240
c481ec97 2241 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2242 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2243 ETH_ALEN) == 0)) {
c481ec97
S		 2244 struct ieee80211_channel_sw_ie *sw_elem =
2245 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2246 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2247 bss, rx_status->mactime);
c481ec97 2248 }
f0706e82
JB		 2249}
2250
2251
f698d856 2252static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2253 struct sk_buff *skb)
f0706e82 2254{
af6b6374 2255 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2256 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2257 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2258 size_t baselen, len = skb->len;
ae6a44e3
EK		 2259 struct ieee802_11_elems elems;
2260
15b7b062
KV		 2261 ifmgd = &sdata->u.mgd;
2262
77fdaa12
JB		 2263 ASSERT_MGD_MTX(ifmgd);
2264
b203ca39 2265 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2266 return; /* ignore ProbeResp to foreign address */
2267
ae6a44e3
EK		 2268 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2269 if (baselen > len)
2270 return;
2271
2272 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2273 &elems);
2274
98c8fccf 2275 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2276
77fdaa12 2277 if (ifmgd->associated &&
b203ca39 2278 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2279 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2280
2281 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2282 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41
JB		 2283 /* got probe response, continue with auth */
2284 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2285 ifmgd->auth_data->tries = 0;
2286 ifmgd->auth_data->timeout = jiffies;
2287 run_again(ifmgd, ifmgd->auth_data->timeout);
2288 }
f0706e82
JB		 2289}
2290
d91f36db
JB		 2291/*
2292 * This is the canonical list of information elements we care about,
2293 * the filter code also gives us all changes to the Microsoft OUI
2294 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2295 *
2296 * We implement beacon filtering in software since that means we can
2297 * avoid processing the frame here and in cfg80211, and userspace
2298 * will not be able to tell whether the hardware supports it or not.
2299 *
2300 * XXX: This list needs to be dynamic -- userspace needs to be able to
2301 * add items it requires. It also needs to be able to tell us to
2302 * look out for other vendor IEs.
2303 */
2304static const u64 care_about_ies =
1d4df3a5
JB		 2305 (1ULL << WLAN_EID_COUNTRY) |
2306 (1ULL << WLAN_EID_ERP_INFO) |
2307 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2308 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2309 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2310 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2311
f698d856 2312static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2313 struct ieee80211_mgmt *mgmt,
2314 size_t len,
2315 struct ieee80211_rx_status *rx_status)
2316{
d91f36db 2317 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2318 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2319 size_t baselen;
2320 struct ieee802_11_elems elems;
f698d856 2321 struct ieee80211_local *local = sdata->local;
471b3efd 2322 u32 changed = 0;
d91f36db 2323 bool erp_valid, directed_tim = false;
7a5158ef 2324 u8 erp_value = 0;
d91f36db 2325 u32 ncrc;
77fdaa12
JB		 2326 u8 *bssid;
2327
66e67e41 2328 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2329
ae6a44e3
EK		 2330 /* Process beacon from the current BSS */
2331 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2332 if (baselen > len)
2333 return;
2334
d91f36db 2335 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2336 return;
f0706e82 2337
66e67e41 2338 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2339 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2340 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2341 len - baselen, &elems);
77fdaa12 2342
66e67e41
JB		 2343 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2344 false);
2345 ifmgd->assoc_data->have_beacon = true;
2346 ifmgd->assoc_data->sent_assoc = false;
2347 /* continue assoc process */
2348 ifmgd->assoc_data->timeout = jiffies;
2349 run_again(ifmgd, ifmgd->assoc_data->timeout);
2350 return;
2351 }
77fdaa12 2352
66e67e41 2353 if (!ifmgd->associated ||
b203ca39 2354 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2355 return;
66e67e41 2356 bssid = ifmgd->associated->bssid;
f0706e82 2357
17e4ec14
JM		 2358 /* Track average RSSI from the Beacon frames of the current AP */
2359 ifmgd->last_beacon_signal = rx_status->signal;
2360 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2361 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2362 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2363 ifmgd->last_cqm_event_signal = 0;
391a200a 2364 ifmgd->count_beacon_signal = 1;
615f7b9b 2365 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2366 } else {
2367 ifmgd->ave_beacon_signal =
2368 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2369 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2370 ifmgd->ave_beacon_signal) / 16;
391a200a 2371 ifmgd->count_beacon_signal++;
17e4ec14 2372 }
615f7b9b
MV		 2373
2374 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2375 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2376 int sig = ifmgd->ave_beacon_signal;
2377 int last_sig = ifmgd->last_ave_beacon_signal;
2378
2379 /*
2380 * if signal crosses either of the boundaries, invoke callback
2381 * with appropriate parameters
2382 */
2383 if (sig > ifmgd->rssi_max_thold &&
2384 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2385 ifmgd->last_ave_beacon_signal = sig;
2386 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2387 } else if (sig < ifmgd->rssi_min_thold &&
2388 (last_sig >= ifmgd->rssi_max_thold ||
2389 last_sig == 0)) {
2390 ifmgd->last_ave_beacon_signal = sig;
2391 drv_rssi_callback(local, RSSI_EVENT_LOW);
2392 }
2393 }
2394
17e4ec14 2395 if (bss_conf->cqm_rssi_thold &&
391a200a 2396 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2397 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2398 int sig = ifmgd->ave_beacon_signal / 16;
2399 int last_event = ifmgd->last_cqm_event_signal;
2400 int thold = bss_conf->cqm_rssi_thold;
2401 int hyst = bss_conf->cqm_rssi_hyst;
2402 if (sig < thold &&
2403 (last_event == 0 || sig < last_event - hyst)) {
2404 ifmgd->last_cqm_event_signal = sig;
2405 ieee80211_cqm_rssi_notify(
2406 &sdata->vif,
2407 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2408 GFP_KERNEL);
2409 } else if (sig > thold &&
2410 (last_event == 0 || sig > last_event + hyst)) {
2411 ifmgd->last_cqm_event_signal = sig;
2412 ieee80211_cqm_rssi_notify(
2413 &sdata->vif,
2414 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2415 GFP_KERNEL);
2416 }
2417 }
2418
b291ba11 2419 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180 2420#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 2421 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2422 sdata->name);
92778180 2423#endif
925e64c3 2424 mutex_lock(&local->mtx);
b291ba11 2425 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2426 ieee80211_run_deferred_scan(local);
2427 mutex_unlock(&local->mtx);
2428
4e751843
JB		 2429 mutex_lock(&local->iflist_mtx);
2430 ieee80211_recalc_ps(local, -1);
2431 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2432 }
2433
b291ba11
JB		 2434 /*
2435 * Push the beacon loss detection into the future since
2436 * we are processing a beacon from the AP just now.
2437 */
d3a910a8 2438 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2439
d91f36db
JB		 2440 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2441 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2442 len - baselen, &elems,
2443 care_about_ies, ncrc);
2444
2445 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2446 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2447 ifmgd->aid);
d91f36db 2448
d8ec4433 2449 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2450 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2451 true);
d91f36db 2452
4ced3f74 2453 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2454 elems.wmm_param_len);
2455 }
fe3fa827 2456
25c9c875 2457 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2458 if (directed_tim) {
572e0012 2459 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2460 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2461 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2462 ieee80211_hw_config(local,
2463 IEEE80211_CONF_CHANGE_PS);
2464 }
572e0012 2465 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2466 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2467 local->pspolling = true;
2468
2469 /*
2470 * Here is assumed that the driver will be
2471 * able to send ps-poll frame and receive a
2472 * response even though power save mode is
2473 * enabled, but some drivers might require
2474 * to disable power save here. This needs
2475 * to be investigated.
2476 */
2477 ieee80211_send_pspoll(local, sdata);
2478 }
a97b77b9
VN		 2479 }
2480 }
7a5158ef 2481
d8ec4433 2482 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2483 return;
2484 ifmgd->beacon_crc = ncrc;
d8ec4433 2485 ifmgd->beacon_crc_valid = true;
30196673 2486
7a5158ef
JB		 2487 if (elems.erp_info && elems.erp_info_len >= 1) {
2488 erp_valid = true;
2489 erp_value = elems.erp_info[0];
2490 } else {
2491 erp_valid = false;
50c4afb9 2492 }
7a5158ef
JB		 2493 changed |= ieee80211_handle_bss_capability(sdata,
2494 le16_to_cpu(mgmt->u.beacon.capab_info),
2495 erp_valid, erp_value);
f0706e82 2496
d3c990fb 2497
074d46d1 2498 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2499 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2500 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2501
2502 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2503
24398e39
JB		 2504 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2505 bssid, true);
d3c990fb
RR		 2506 }
2507
8b19e6ca 2508 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2509 if (elems.country_elem) {
a8302de9
VT		 2510 /* TODO: IBSS also needs this */
2511 if (elems.pwr_constr_elem)
2512 ieee80211_handle_pwr_constr(sdata,
2513 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2514 elems.pwr_constr_elem,
2515 elems.pwr_constr_elem_len);
3f2355cb
LR		 2516 }
2517
471b3efd 2518 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2519}
2520
1fa57d01
JB		 2521void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2522 struct sk_buff *skb)
f0706e82 2523{
77fdaa12 2524 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2525 struct ieee80211_rx_status *rx_status;
f0706e82 2526 struct ieee80211_mgmt *mgmt;
66e67e41 2527 struct cfg80211_bss *bss = NULL;
77fdaa12 2528 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2529 u16 fc;
2530
f0706e82
JB		 2531 rx_status = (struct ieee80211_rx_status *) skb->cb;
2532 mgmt = (struct ieee80211_mgmt *) skb->data;
2533 fc = le16_to_cpu(mgmt->frame_control);
2534
77fdaa12
JB		 2535 mutex_lock(&ifmgd->mtx);
2536
66e67e41
JB		 2537 switch (fc & IEEE80211_FCTL_STYPE) {
2538 case IEEE80211_STYPE_BEACON:
2539 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2540 break;
2541 case IEEE80211_STYPE_PROBE_RESP:
2542 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2543 break;
2544 case IEEE80211_STYPE_AUTH:
2545 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2546 break;
2547 case IEEE80211_STYPE_DEAUTH:
2548 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2549 break;
2550 case IEEE80211_STYPE_DISASSOC:
2551 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2552 break;
2553 case IEEE80211_STYPE_ASSOC_RESP:
2554 case IEEE80211_STYPE_REASSOC_RESP:
2555 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2556 break;
2557 case IEEE80211_STYPE_ACTION:
2558 switch (mgmt->u.action.category) {
2559 case WLAN_CATEGORY_SPECTRUM_MGMT:
2560 ieee80211_sta_process_chanswitch(sdata,
2561 &mgmt->u.action.u.chan_switch.sw_elem,
2562 (void *)ifmgd->associated->priv,
2563 rx_status->mactime);
77fdaa12 2564 break;
77fdaa12 2565 }
77fdaa12 2566 }
77fdaa12
JB		 2567 mutex_unlock(&ifmgd->mtx);
2568
66e67e41
JB		 2569 switch (rma) {
2570 case RX_MGMT_NONE:
2571 /* no action */
2572 break;
2573 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2574 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2575 break;
2576 case RX_MGMT_CFG80211_DISASSOC:
2577 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2578 break;
2579 case RX_MGMT_CFG80211_RX_AUTH:
2580 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2581 break;
2582 case RX_MGMT_CFG80211_RX_ASSOC:
2583 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2584 break;
2585 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2586 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2587 break;
2588 default:
2589 WARN(1, "unexpected: %d", rma);
b054b747 2590 }
f0706e82
JB		 2591}
2592
9c6bd790 2593static void ieee80211_sta_timer(unsigned long data)
f0706e82 2594{
60f8b39c
JB		 2595 struct ieee80211_sub_if_data *sdata =
2596 (struct ieee80211_sub_if_data *) data;
46900298 2597 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2598 struct ieee80211_local *local = sdata->local;
f0706e82 2599
5bb644a0
JB		 2600 if (local->quiescing) {
2601 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2602 return;
2603 }
2604
64592c8f 2605 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2606}
2607
04ac3c0e 2608static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2609 u8 *bssid, u8 reason)
04ac3c0e
FF		 2610{
2611 struct ieee80211_local *local = sdata->local;
2612 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2613 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2614
925e64c3 2615 ieee80211_stop_poll(sdata);
04ac3c0e 2616
37ad3888
JB		 2617 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2618 false, frame_buf);
04ac3c0e 2619 mutex_unlock(&ifmgd->mtx);
37ad3888 2620
04ac3c0e
FF		 2621 /*
2622 * must be outside lock due to cfg80211,
2623 * but that's not a problem.
2624 */
5fef7dbc 2625 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2626
2627 mutex_lock(&local->mtx);
2628 ieee80211_recalc_idle(local);
2629 mutex_unlock(&local->mtx);
2630
04ac3c0e
FF		 2631 mutex_lock(&ifmgd->mtx);
2632}
2633
66e67e41
JB		 2634static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2635{
2636 struct ieee80211_local *local = sdata->local;
2637 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2638 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2639
2640 lockdep_assert_held(&ifmgd->mtx);
2641
2642 if (WARN_ON_ONCE(!auth_data))
2643 return -EINVAL;
2644
66e67e41
JB		 2645 auth_data->tries++;
2646
2647 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2648 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2649 sdata->name, auth_data->bss->bssid);
2650
2651 /*
2652 * Most likely AP is not in the range so remove the
2653 * bss struct for that AP.
2654 */
2655 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2656
2657 return -ETIMEDOUT;
2658 }
2659
2660 if (auth_data->bss->proberesp_ies) {
2661 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2662 sdata->name, auth_data->bss->bssid, auth_data->tries,
2663 IEEE80211_AUTH_MAX_TRIES);
2664
2665 auth_data->expected_transaction = 2;
2666 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2667 auth_data->ie, auth_data->ie_len,
2668 auth_data->bss->bssid,
2669 auth_data->bss->bssid, NULL, 0, 0);
2670 } else {
2671 const u8 *ssidie;
2672
2673 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2674 sdata->name, auth_data->bss->bssid, auth_data->tries,
2675 IEEE80211_AUTH_MAX_TRIES);
2676
2677 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2678 if (!ssidie)
2679 return -EINVAL;
2680 /*
2681 * Direct probe is sent to broadcast address as some APs
2682 * will not answer to direct packet in unassociated state.
2683 */
2684 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2685 NULL, 0, (u32) -1, true, false);
2686 }
2687
2688 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2689 run_again(ifmgd, auth_data->timeout);
2690
2691 return 0;
2692}
2693
2694static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2695{
2696 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2697 struct ieee80211_local *local = sdata->local;
2698
2699 lockdep_assert_held(&sdata->u.mgd.mtx);
2700
66e67e41
JB		 2701 assoc_data->tries++;
2702 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2703 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2704 sdata->name, assoc_data->bss->bssid);
2705
2706 /*
2707 * Most likely AP is not in the range so remove the
2708 * bss struct for that AP.
2709 */
2710 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2711
2712 return -ETIMEDOUT;
2713 }
2714
2715 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2716 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2717 IEEE80211_ASSOC_MAX_TRIES);
2718 ieee80211_send_assoc(sdata);
2719
2720 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2721 run_again(&sdata->u.mgd, assoc_data->timeout);
2722
2723 return 0;
2724}
2725
1fa57d01 2726void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2727{
9c6bd790 2728 struct ieee80211_local *local = sdata->local;
1fa57d01 2729 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2730
77fdaa12
JB		 2731 mutex_lock(&ifmgd->mtx);
2732
66e67e41
JB		 2733 if (ifmgd->auth_data &&
2734 time_after(jiffies, ifmgd->auth_data->timeout)) {
2735 if (ifmgd->auth_data->done) {
2736 /*
2737 * ok ... we waited for assoc but userspace didn't,
2738 * so let's just kill the auth data
2739 */
2740 ieee80211_destroy_auth_data(sdata, false);
2741 } else if (ieee80211_probe_auth(sdata)) {
2742 u8 bssid[ETH_ALEN];
2743
2744 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2745
2746 ieee80211_destroy_auth_data(sdata, false);
2747
2748 mutex_unlock(&ifmgd->mtx);
2749 cfg80211_send_auth_timeout(sdata->dev, bssid);
2750 mutex_lock(&ifmgd->mtx);
2751 }
2752 } else if (ifmgd->auth_data)
2753 run_again(ifmgd, ifmgd->auth_data->timeout);
2754
2755 if (ifmgd->assoc_data &&
2756 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2757 if (!ifmgd->assoc_data->have_beacon ||
2758 ieee80211_do_assoc(sdata)) {
2759 u8 bssid[ETH_ALEN];
2760
2761 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2762
2763 ieee80211_destroy_assoc_data(sdata, false);
2764
2765 mutex_unlock(&ifmgd->mtx);
2766 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2767 mutex_lock(&ifmgd->mtx);
2768 }
2769 } else if (ifmgd->assoc_data)
2770 run_again(ifmgd, ifmgd->assoc_data->timeout);
2771
b291ba11
JB		 2772 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2773 IEEE80211_STA_CONNECTION_POLL) &&
2774 ifmgd->associated) {
a43abf29 2775 u8 bssid[ETH_ALEN];
72a8a3ed 2776 int max_tries;
a43abf29 2777
0c1ad2ca 2778 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2779
72a8a3ed 2780 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2781 max_tries = max_nullfunc_tries;
72a8a3ed 2782 else
180205bd 2783 max_tries = max_probe_tries;
72a8a3ed 2784
4e5ff376
FF		 2785 /* ACK received for nullfunc probing frame */
2786 if (!ifmgd->probe_send_count)
2787 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2788 else if (ifmgd->nullfunc_failed) {
2789 if (ifmgd->probe_send_count < max_tries) {
2790#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2791 wiphy_debug(local->hw.wiphy,
2792 "%s: No ack for nullfunc frame to"
bfc31df3 2793 " AP %pM, try %d/%i\n",
04ac3c0e 2794 sdata->name, bssid,
bfc31df3 2795 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2796#endif
2797 ieee80211_mgd_probe_ap_send(sdata);
2798 } else {
2799#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2800 wiphy_debug(local->hw.wiphy,
2801 "%s: No ack for nullfunc frame to"
2802 " AP %pM, disconnecting.\n",
c658e5db 2803 sdata->name, bssid);
04ac3c0e 2804#endif
95acac61
JB		 2805 ieee80211_sta_connection_lost(sdata, bssid,
2806 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2807 }
2808 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2809 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2810 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2811#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2812 wiphy_debug(local->hw.wiphy,
2813 "%s: Failed to send nullfunc to AP %pM"
2814 " after %dms, disconnecting.\n",
2815 sdata->name,
180205bd 2816 bssid, probe_wait_ms);
04ac3c0e 2817#endif
95acac61
JB		 2818 ieee80211_sta_connection_lost(sdata, bssid,
2819 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2820 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2821#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2822 wiphy_debug(local->hw.wiphy,
2823 "%s: No probe response from AP %pM"
bfc31df3 2824 " after %dms, try %d/%i\n",
b38afa87 2825 sdata->name,
180205bd 2826 bssid, probe_wait_ms,
bfc31df3 2827 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2828#endif
2829 ieee80211_mgd_probe_ap_send(sdata);
2830 } else {
b291ba11
JB		 2831 /*
2832 * We actually lost the connection ... or did we?
2833 * Let's make sure!
2834 */
b38afa87
BG		 2835 wiphy_debug(local->hw.wiphy,
2836 "%s: No probe response from AP %pM"
2837 " after %dms, disconnecting.\n",
2838 sdata->name,
180205bd 2839 bssid, probe_wait_ms);
04ac3c0e 2840
95acac61
JB		 2841 ieee80211_sta_connection_lost(sdata, bssid,
2842 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2843 }
2844 }
2845
77fdaa12 2846 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2847
2848 mutex_lock(&local->mtx);
2849 ieee80211_recalc_idle(local);
2850 mutex_unlock(&local->mtx);
f0706e82
JB		 2851}
2852
b291ba11
JB		 2853static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2854{
2855 struct ieee80211_sub_if_data *sdata =
2856 (struct ieee80211_sub_if_data *) data;
2857 struct ieee80211_local *local = sdata->local;
2858
2859 if (local->quiescing)
2860 return;
2861
1e4dcd01
JO		 2862 ieee80211_queue_work(&sdata->local->hw,
2863 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2864}
2865
2866static void ieee80211_sta_conn_mon_timer(unsigned long data)
2867{
2868 struct ieee80211_sub_if_data *sdata =
2869 (struct ieee80211_sub_if_data *) data;
2870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2871 struct ieee80211_local *local = sdata->local;
2872
2873 if (local->quiescing)
2874 return;
2875
42935eca 2876 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2877}
2878
2879static void ieee80211_sta_monitor_work(struct work_struct *work)
2880{
2881 struct ieee80211_sub_if_data *sdata =
2882 container_of(work, struct ieee80211_sub_if_data,
2883 u.mgd.monitor_work);
2884
2885 ieee80211_mgd_probe_ap(sdata, false);
2886}
2887
9c6bd790
JB		 2888static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2889{
494f1fe5
EP		 2890 u32 flags;
2891
ad935687 2892 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2893 __ieee80211_stop_poll(sdata);
ad935687 2894
b291ba11 2895 /* let's probe the connection once */
494f1fe5
EP		 2896 flags = sdata->local->hw.flags;
2897 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2898 ieee80211_queue_work(&sdata->local->hw,
2899 &sdata->u.mgd.monitor_work);
b291ba11 2900 /* and do all the other regular work too */
64592c8f 2901 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2902 }
9c6bd790 2903}
f0706e82 2904
5bb644a0
JB		 2905#ifdef CONFIG_PM
2906void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2907{
2908 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2909
2910 /*
2911 * we need to use atomic bitops for the running bits
2912 * only because both timers might fire at the same
2913 * time -- the code here is properly synchronised.
2914 */
2915
d1f5b7a3
JB		 2916 cancel_work_sync(&ifmgd->request_smps_work);
2917
0ecfe806 2918 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2919 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2920 if (del_timer_sync(&ifmgd->timer))
2921 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2922
2923 cancel_work_sync(&ifmgd->chswitch_work);
2924 if (del_timer_sync(&ifmgd->chswitch_timer))
2925 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2926
b291ba11
JB		 2927 /* these will just be re-established on connection */
2928 del_timer_sync(&ifmgd->conn_mon_timer);
2929 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2930}
2931
2932void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2933{
2934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2935
676b58c2
RM		 2936 if (!ifmgd->associated)
2937 return;
2938
95acac61
JB		 2939 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2940 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2941 mutex_lock(&ifmgd->mtx);
2942 if (ifmgd->associated) {
2943#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2944 wiphy_debug(sdata->local->hw.wiphy,
2945 "%s: driver requested disconnect after resume.\n",
2946 sdata->name);
2947#endif
2948 ieee80211_sta_connection_lost(sdata,
2949 ifmgd->associated->bssid,
2950 WLAN_REASON_UNSPECIFIED);
2951 mutex_unlock(&ifmgd->mtx);
2952 return;
2953 }
2954 mutex_unlock(&ifmgd->mtx);
2955 }
2956
5bb644a0
JB		 2957 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2958 add_timer(&ifmgd->timer);
2959 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2960 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2961 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2962
2963 mutex_lock(&sdata->local->mtx);
46090979 2964 ieee80211_restart_sta_timer(sdata);
925e64c3 2965 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2966}
2967#endif
2968
9c6bd790
JB		 2969/* interface setup */
2970void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2971{
46900298 2972 struct ieee80211_if_managed *ifmgd;
988c0f72 2973
46900298 2974 ifmgd = &sdata->u.mgd;
b291ba11 2975 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2976 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2977 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2978 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2979 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2980 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2981 (unsigned long) sdata);
b291ba11
JB		 2982 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2983 (unsigned long) sdata);
2984 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2985 (unsigned long) sdata);
46900298 2986 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2987 (unsigned long) sdata);
9c6bd790 2988
ab1faead 2989 ifmgd->flags = 0;
1478acb3 2990 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2991 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2992 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2993
77fdaa12 2994 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2995
2996 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2997 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2998 else
2999 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3000}
3001
77fdaa12
JB		 3002/* scan finished notification */
3003void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3004{
77fdaa12 3005 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 3006
77fdaa12
JB		 3007 /* Restart STA timers */
3008 rcu_read_lock();
3009 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3010 ieee80211_restart_sta_timer(sdata);
3011 rcu_read_unlock();
3012}
60f8b39c 3013
77fdaa12
JB		 3014int ieee80211_max_network_latency(struct notifier_block *nb,
3015 unsigned long data, void *dummy)
3016{
3017 s32 latency_usec = (s32) data;
3018 struct ieee80211_local *local =
3019 container_of(nb, struct ieee80211_local,
3020 network_latency_notifier);
1fa6f4af 3021
77fdaa12
JB		 3022 mutex_lock(&local->iflist_mtx);
3023 ieee80211_recalc_ps(local, latency_usec);
3024 mutex_unlock(&local->iflist_mtx);
dfe67012 3025
77fdaa12 3026 return 0;
9c6bd790
JB		 3027}
3028
a1cf775d 3029static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 3030 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 3031{
3032 struct ieee80211_local *local = sdata->local;
3033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3034 struct ieee80211_bss *bss = (void *)cbss->priv;
a1cf775d
JB		 3035 struct sta_info *sta;
3036 bool have_sta = false;
3037 int err;
24398e39
JB		 3038 int ht_cfreq;
3039 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3040 const u8 *ht_oper_ie;
3041 const struct ieee80211_ht_operation *ht_oper = NULL;
3042 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3043
3044 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3045 return -EINVAL;
3046
3047 if (assoc) {
3048 rcu_read_lock();
5d6a1b06 3049 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3050 rcu_read_unlock();
3051 }
3052
3053 if (!have_sta) {
5d6a1b06 3054 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3055 if (!sta)
3056 return -ENOMEM;
3057 }
3058
3059 mutex_lock(&local->mtx);
3060 ieee80211_recalc_idle(sdata->local);
3061 mutex_unlock(&local->mtx);
3062
3063 /* switch to the right channel */
24398e39
JB		 3064 sband = local->hw.wiphy->bands[cbss->channel->band];
3065
3066 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3067
3068 if (sband->ht_cap.ht_supported) {
3069 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3070 cbss->information_elements,
3071 cbss->len_information_elements);
3072 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3073 ht_oper = (void *)(ht_oper_ie + 2);
3074 }
3075
3076 if (ht_oper) {
3077 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3078 cbss->channel->band);
3079 /* check that channel matches the right operating channel */
3080 if (cbss->channel->center_freq != ht_cfreq) {
3081 /*
3082 * It's possible that some APs are confused here;
3083 * Netgear WNDR3700 sometimes reports 4 higher than
3084 * the actual channel in association responses, but
3085 * since we look at probe response/beacon data here
3086 * it should be OK.
3087 */
3088 printk(KERN_DEBUG
3089 "%s: Wrong control channel: center-freq: %d"
3090 " ht-cfreq: %d ht->primary_chan: %d"
3091 " band: %d. Disabling HT.\n",
3092 sdata->name, cbss->channel->center_freq,
3093 ht_cfreq, ht_oper->primary_chan,
3094 cbss->channel->band);
3095 ht_oper = NULL;
3096 }
3097 }
3098
3099 if (ht_oper) {
3100 channel_type = NL80211_CHAN_HT20;
3101
3102 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3103 switch (ht_oper->ht_param &
3104 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3105 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3106 channel_type = NL80211_CHAN_HT40PLUS;
3107 break;
3108 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3109 channel_type = NL80211_CHAN_HT40MINUS;
3110 break;
3111 }
3112 }
3113 }
3114
3115 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3116 /* can only fail due to HT40+/- mismatch */
3117 channel_type = NL80211_CHAN_HT20;
3118 printk(KERN_DEBUG
3119 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3120 sdata->name);
3121 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3122 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3123 channel_type));
3124 }
3125
5d6a1b06 3126 local->oper_channel = cbss->channel;
24398e39 3127 ieee80211_hw_config(local, 0);
a1cf775d
JB		 3128
3129 if (!have_sta) {
5d6a1b06
JB		 3130 u32 rates = 0, basic_rates = 0;
3131 bool have_higher_than_11mbit;
3132 int min_rate = INT_MAX, min_rate_index = -1;
3133
5d6a1b06
JB		 3134 ieee80211_get_rates(sband, bss->supp_rates,
3135 bss->supp_rates_len,
3136 &rates, &basic_rates,
3137 &have_higher_than_11mbit,
3138 &min_rate, &min_rate_index);
3139
3140 /*
3141 * This used to be a workaround for basic rates missing
3142 * in the association response frame. Now that we no
3143 * longer use the basic rates from there, it probably
3144 * doesn't happen any more, but keep the workaround so
3145 * in case some *other* APs are buggy in different ways
3146 * we can connect -- with a warning.
3147 */
3148 if (!basic_rates && min_rate_index >= 0) {
3149 printk(KERN_DEBUG
3150 "%s: No basic rates, using min rate instead.\n",
3151 sdata->name);
3152 basic_rates = BIT(min_rate_index);
3153 }
3154
3155 sta->sta.supp_rates[cbss->channel->band] = rates;
3156 sdata->vif.bss_conf.basic_rates = basic_rates;
3157
3158 /* cf. IEEE 802.11 9.2.12 */
3159 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3160 have_higher_than_11mbit)
3161 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3162 else
3163 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3164
3165 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3166
3167 /* tell driver about BSSID and basic rates */
3168 ieee80211_bss_info_change_notify(sdata,
3169 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3170
3171 if (assoc)
3172 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3173
3174 err = sta_info_insert(sta);
3175 sta = NULL;
3176 if (err) {
3177 printk(KERN_DEBUG
3178 "%s: failed to insert STA entry for the AP (error %d)\n",
3179 sdata->name, err);
3180 return err;
3181 }
3182 } else
b203ca39 3183 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3184
3185 return 0;
3186}
3187
77fdaa12
JB		 3188/* config hooks */
3189int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3190 struct cfg80211_auth_request *req)
9c6bd790 3191{
66e67e41
JB		 3192 struct ieee80211_local *local = sdata->local;
3193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3194 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3195 u16 auth_alg;
66e67e41
JB		 3196 int err;
3197
3198 /* prepare auth data structure */
9c6bd790 3199
77fdaa12
JB		 3200 switch (req->auth_type) {
3201 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3202 auth_alg = WLAN_AUTH_OPEN;
3203 break;
3204 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3205 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3206 return -EOPNOTSUPP;
77fdaa12
JB		 3207 auth_alg = WLAN_AUTH_SHARED_KEY;
3208 break;
3209 case NL80211_AUTHTYPE_FT:
3210 auth_alg = WLAN_AUTH_FT;
3211 break;
3212 case NL80211_AUTHTYPE_NETWORK_EAP:
3213 auth_alg = WLAN_AUTH_LEAP;
3214 break;
3215 default:
3216 return -EOPNOTSUPP;
60f8b39c 3217 }
77fdaa12 3218
66e67e41
JB		 3219 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3220 if (!auth_data)
9c6bd790 3221 return -ENOMEM;
77fdaa12 3222
66e67e41 3223 auth_data->bss = req->bss;
77fdaa12
JB		 3224
3225 if (req->ie && req->ie_len) {
66e67e41
JB		 3226 memcpy(auth_data->ie, req->ie, req->ie_len);
3227 auth_data->ie_len = req->ie_len;
9c6bd790 3228 }
77fdaa12 3229
fffd0934 3230 if (req->key && req->key_len) {
66e67e41
JB		 3231 auth_data->key_len = req->key_len;
3232 auth_data->key_idx = req->key_idx;
3233 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3234 }
3235
66e67e41 3236 auth_data->algorithm = auth_alg;
60f8b39c 3237
66e67e41 3238 /* try to authenticate/probe */
2a33bee2 3239
66e67e41 3240 mutex_lock(&ifmgd->mtx);
2a33bee2 3241
66e67e41
JB		 3242 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3243 ifmgd->assoc_data) {
3244 err = -EBUSY;
3245 goto err_free;
2a33bee2
GE		 3246 }
3247
66e67e41
JB		 3248 if (ifmgd->auth_data)
3249 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3250
66e67e41
JB		 3251 /* prep auth_data so we don't go into idle on disassoc */
3252 ifmgd->auth_data = auth_data;
af6b6374 3253
66e67e41 3254 if (ifmgd->associated)
37ad3888 3255 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3256
66e67e41
JB		 3257 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3258 sdata->name, req->bss->bssid);
e5b900d2 3259
a1cf775d
JB		 3260 err = ieee80211_prep_connection(sdata, req->bss, false);
3261 if (err)
66e67e41 3262 goto err_clear;
af6b6374 3263
66e67e41
JB		 3264 err = ieee80211_probe_auth(sdata);
3265 if (err) {
66e67e41
JB		 3266 sta_info_destroy_addr(sdata, req->bss->bssid);
3267 goto err_clear;
3268 }
3269
3270 /* hold our own reference */
3271 cfg80211_ref_bss(auth_data->bss);
3272 err = 0;
3273 goto out_unlock;
3274
3275 err_clear:
3276 ifmgd->auth_data = NULL;
3277 err_free:
3278 kfree(auth_data);
3279 out_unlock:
3280 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3281
66e67e41 3282 return err;
af6b6374
JB		 3283}
3284
77fdaa12
JB		 3285int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3286 struct cfg80211_assoc_request *req)
f0706e82 3287{
66e67e41 3288 struct ieee80211_local *local = sdata->local;
77fdaa12 3289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3290 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3291 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3292 struct ieee80211_supported_band *sband;
66e67e41 3293 const u8 *ssidie;
2a33bee2 3294 int i, err;
f0706e82 3295
66e67e41
JB		 3296 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3297 if (!ssidie)
3298 return -EINVAL;
3299
3300 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3301 if (!assoc_data)
3302 return -ENOMEM;
3303
77fdaa12 3304 mutex_lock(&ifmgd->mtx);
9c87ba67 3305
66e67e41 3306 if (ifmgd->associated)
37ad3888 3307 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3308
3309 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3310 err = -EBUSY;
3311 goto err_free;
af6b6374 3312 }
77fdaa12 3313
66e67e41
JB		 3314 if (ifmgd->assoc_data) {
3315 err = -EBUSY;
3316 goto err_free;
3317 }
77fdaa12 3318
66e67e41
JB		 3319 if (ifmgd->auth_data) {
3320 bool match;
3321
3322 /* keep sta info, bssid if matching */
b203ca39 3323 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3324 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3325 }
3326
66e67e41
JB		 3327 /* prepare assoc data */
3328
77fdaa12 3329 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3330 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3331
d8ec4433
JO		 3332 ifmgd->beacon_crc_valid = false;
3333
de5036aa
JB		 3334 /*
3335 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3336 * We still associate in non-HT mode (11a/b/g) if any one of these
3337 * ciphers is configured as pairwise.
3338 * We can set this to true for non-11n hardware, that'll be checked
3339 * separately along with the peer capabilities.
3340 */
77fdaa12
JB		 3341 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3342 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3343 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3344 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3345 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3346
ef96a842
BG		 3347 if (req->flags & ASSOC_REQ_DISABLE_HT)
3348 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3349
4e74bfdb
JB		 3350 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3351 sband = local->hw.wiphy->bands[req->bss->channel->band];
3352 if (!sband->ht_cap.ht_supported ||
32c5057b 3353 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
4e74bfdb
JB		 3354 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3355
ef96a842
BG		 3356 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3357 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3358 sizeof(ifmgd->ht_capa_mask));
3359
77fdaa12 3360 if (req->ie && req->ie_len) {
66e67e41
JB		 3361 memcpy(assoc_data->ie, req->ie, req->ie_len);
3362 assoc_data->ie_len = req->ie_len;
3363 }
f679f65d 3364
66e67e41 3365 assoc_data->bss = req->bss;
f679f65d 3366
af6b6374
JB		 3367 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3368 if (ifmgd->powersave)
3369 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3370 else
3371 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3372 } else
3373 ifmgd->ap_smps = ifmgd->req_smps;
3374
66e67e41 3375 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3376 assoc_data->wmm = bss->wmm_used &&
3377 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3378 assoc_data->supp_rates = bss->supp_rates;
3379 assoc_data->supp_rates_len = bss->supp_rates_len;
074d46d1
JB		 3380 assoc_data->ht_operation_ie =
3381 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
63f170e0 3382
ab13315a
KV		 3383 if (bss->wmm_used && bss->uapsd_supported &&
3384 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3385 assoc_data->uapsd = true;
ab13315a
KV		 3386 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3387 } else {
76f0303d 3388 assoc_data->uapsd = false;
ab13315a
KV		 3389 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3390 }
3391
66e67e41
JB		 3392 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3393 assoc_data->ssid_len = ssidie[1];
63f170e0 3394
77fdaa12 3395 if (req->prev_bssid)
66e67e41 3396 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3397
3398 if (req->use_mfp) {
3399 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3400 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3401 } else {
3402 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3403 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3404 }
3405
3406 if (req->crypto.control_port)
3407 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3408 else
3409 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3410
a621fa4d
JB		 3411 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3412 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3413
66e67e41
JB		 3414 /* kick off associate process */
3415
3416 ifmgd->assoc_data = assoc_data;
3417
a1cf775d
JB		 3418 err = ieee80211_prep_connection(sdata, req->bss, true);
3419 if (err)
3420 goto err_clear;
66e67e41
JB		 3421
3422 if (!bss->dtim_period &&
3423 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3424 /*
3425 * Wait up to one beacon interval ...
3426 * should this be more if we miss one?
3427 */
3428 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3429 sdata->name, ifmgd->bssid);
3f9768a5 3430 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3431 } else {
3432 assoc_data->have_beacon = true;
3433 assoc_data->sent_assoc = false;
3434 assoc_data->timeout = jiffies;
3435 }
3436 run_again(ifmgd, assoc_data->timeout);
3437
fcff4f10
PS		 3438 if (bss->corrupt_data) {
3439 char *corrupt_type = "data";
3440 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3441 if (bss->corrupt_data &
3442 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3443 corrupt_type = "beacon and probe response";
3444 else
3445 corrupt_type = "beacon";
3446 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3447 corrupt_type = "probe response";
3448 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3449 sdata->name, corrupt_type);
3450 }
3451
66e67e41
JB		 3452 err = 0;
3453 goto out;
3454 err_clear:
3455 ifmgd->assoc_data = NULL;
3456 err_free:
3457 kfree(assoc_data);
3458 out:
3459 mutex_unlock(&ifmgd->mtx);
3460
3461 return err;
f0706e82
JB		 3462}
3463
77fdaa12 3464int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3465 struct cfg80211_deauth_request *req)
f0706e82 3466{
46900298 3467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3468 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3469
77fdaa12
JB		 3470 mutex_lock(&ifmgd->mtx);
3471
37ad3888 3472 if (ifmgd->auth_data) {
66e67e41 3473 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3474 mutex_unlock(&ifmgd->mtx);
66e67e41 3475 return 0;
af6b6374 3476 }
77fdaa12 3477
37ad3888
JB		 3478 printk(KERN_DEBUG
3479 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3480 sdata->name, req->bssid, req->reason_code);
0ff71613 3481
37ad3888 3482 if (ifmgd->associated &&
b203ca39 3483 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
37ad3888 3484 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3485 req->reason_code, true, frame_buf);
37ad3888
JB		 3486 else
3487 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3488 IEEE80211_STYPE_DEAUTH,
3489 req->reason_code, true,
3490 frame_buf);
3491 mutex_unlock(&ifmgd->mtx);
3492
5fef7dbc 3493 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3494
7da7cc1d 3495 mutex_lock(&sdata->local->mtx);
bc83b681 3496 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3497 mutex_unlock(&sdata->local->mtx);
bc83b681 3498
f0706e82
JB		 3499 return 0;
3500}
84363e6e 3501
77fdaa12 3502int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3503 struct cfg80211_disassoc_request *req)
9c6bd790 3504{
77fdaa12 3505 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3506 u8 bssid[ETH_ALEN];
5fef7dbc 3507 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3508
77fdaa12 3509 mutex_lock(&ifmgd->mtx);
10f644a4 3510
8d8b261a
JB		 3511 /*
3512 * cfg80211 should catch this ... but it's racy since
3513 * we can receive a disassoc frame, process it, hand it
3514 * to cfg80211 while that's in a locked section already
3515 * trying to tell us that the user wants to disconnect.
3516 */
0c1ad2ca 3517 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3518 mutex_unlock(&ifmgd->mtx);
3519 return -ENOLINK;
3520 }
3521
0ff71613 3522 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3523 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3524
e69e95db 3525 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3526 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3527 req->reason_code, !req->local_state_change,
3528 frame_buf);
77fdaa12 3529 mutex_unlock(&ifmgd->mtx);
10f644a4 3530
5fef7dbc 3531 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3532
7da7cc1d 3533 mutex_lock(&sdata->local->mtx);
bc83b681 3534 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3535 mutex_unlock(&sdata->local->mtx);
bc83b681 3536
10f644a4
JB		 3537 return 0;
3538}
026331c4 3539
afa762f6 3540void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3541{
3542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3543
3544 mutex_lock(&ifmgd->mtx);
3545 if (ifmgd->assoc_data)
3546 ieee80211_destroy_assoc_data(sdata, false);
3547 if (ifmgd->auth_data)
3548 ieee80211_destroy_auth_data(sdata, false);
3549 del_timer_sync(&ifmgd->timer);
3550 mutex_unlock(&ifmgd->mtx);
3551}
3552
a97c13c3
JO		 3553void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3554 enum nl80211_cqm_rssi_threshold_event rssi_event,
3555 gfp_t gfp)
3556{
3557 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3558
b5878a2d
JB		 3559 trace_api_cqm_rssi_notify(sdata, rssi_event);
3560
a97c13c3
JO		 3561 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3562}
3563EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3564
3565unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3566{
3567 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3568 return sdata->dev->operstate;
3569}
3570EXPORT_SYMBOL(ieee80211_get_operstate);
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