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net/mac80211/scan.c: removes unnecessary semicolon
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
5fef7dbc
JB		 91#define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
7eeff74c
JB		 149 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
150 return;
151
b291ba11 152 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 153 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 154}
155
be099e82
LR		 156void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
157{
0c699c3a
LR		 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159
8628172f
SG		 160 if (unlikely(!sdata->u.mgd.associated))
161 return;
162
be099e82
LR		 163 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
164 return;
165
166 mod_timer(&sdata->u.mgd.conn_mon_timer,
167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 168
169 ifmgd->probe_send_count = 0;
be099e82
LR		 170}
171
5484e237 172static int ecw2cw(int ecw)
60f8b39c 173{
5484e237 174 return (1 << ecw) - 1;
60f8b39c
JB		 175}
176
24398e39
JB		 177static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
178 struct ieee80211_ht_operation *ht_oper,
179 const u8 *bssid, bool reconfig)
d5522e03
JB		 180{
181 struct ieee80211_local *local = sdata->local;
182 struct ieee80211_supported_band *sband;
d5522e03
JB		 183 struct sta_info *sta;
184 u32 changed = 0;
9ed6bcce 185 u16 ht_opmode;
64f68e5d 186 bool disable_40 = false;
d5522e03 187
568d6e28 188 sband = local->hw.wiphy->bands[local->oper_channel->band];
d5522e03 189
64f68e5d
JB		 190 switch (sdata->vif.bss_conf.channel_type) {
191 case NL80211_CHAN_HT40PLUS:
568d6e28 192 if (local->oper_channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d
JB		 193 disable_40 = true;
194 break;
195 case NL80211_CHAN_HT40MINUS:
568d6e28 196 if (local->oper_channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d
JB		 197 disable_40 = true;
198 break;
199 default:
200 break;
201 }
d5522e03 202
24398e39
JB		 203 /* This can change during the lifetime of the BSS */
204 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 205 disable_40 = true;
206
207 mutex_lock(&local->sta_mtx);
208 sta = sta_info_get(sdata, bssid);
d5522e03 209
64f68e5d
JB		 210 WARN_ON_ONCE(!sta);
211
212 if (sta && !sta->supports_40mhz)
213 disable_40 = true;
214
215 if (sta && (!reconfig ||
91a0099c 216 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 217 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 218
64f68e5d
JB		 219 if (disable_40)
220 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
221 else
222 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 223
64f68e5d 224 rate_control_rate_update(local, sband, sta,
8f727ef3 225 IEEE80211_RC_BW_CHANGED);
0aaffa9b 226 }
64f68e5d 227 mutex_unlock(&local->sta_mtx);
d5522e03 228
074d46d1 229 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 230
231 /* if bss configuration changed store the new one */
24398e39 232 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 233 changed |= BSS_CHANGED_HT;
9ed6bcce 234 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 235 }
236
237 return changed;
238}
239
9c6bd790
JB		 240/* frame sending functions */
241
66e67e41
JB		 242static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
243 struct ieee80211_supported_band *sband,
244 u32 *rates)
245{
246 int i, j, count;
247 *rates = 0;
248 count = 0;
249 for (i = 0; i < supp_rates_len; i++) {
250 int rate = (supp_rates[i] & 0x7F) * 5;
251
252 for (j = 0; j < sband->n_bitrates; j++)
253 if (sband->bitrates[j].bitrate == rate) {
254 *rates |= BIT(j);
255 count++;
256 break;
257 }
258 }
259
260 return count;
261}
262
263static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 264 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 265 struct ieee80211_supported_band *sband,
266 struct ieee80211_channel *channel,
267 enum ieee80211_smps_mode smps)
268{
66e67e41
JB		 269 u8 *pos;
270 u32 flags = channel->flags;
271 u16 cap;
272 struct ieee80211_sta_ht_cap ht_cap;
273
274 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
275
66e67e41
JB		 276 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
277 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
278
66e67e41
JB		 279 /* determine capability flags */
280 cap = ht_cap.cap;
281
9dde6423 282 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 283 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
284 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
285 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
286 cap &= ~IEEE80211_HT_CAP_SGI_40;
287 }
288 break;
289 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
290 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
291 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
292 cap &= ~IEEE80211_HT_CAP_SGI_40;
293 }
294 break;
295 }
296
24398e39
JB		 297 /*
298 * If 40 MHz was disabled associate as though we weren't
299 * capable of 40 MHz -- some broken APs will never fall
300 * back to trying to transmit in 20 MHz.
301 */
302 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
303 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
304 cap &= ~IEEE80211_HT_CAP_SGI_40;
305 }
306
66e67e41
JB		 307 /* set SM PS mode properly */
308 cap &= ~IEEE80211_HT_CAP_SM_PS;
309 switch (smps) {
310 case IEEE80211_SMPS_AUTOMATIC:
311 case IEEE80211_SMPS_NUM_MODES:
312 WARN_ON(1);
313 case IEEE80211_SMPS_OFF:
314 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
315 IEEE80211_HT_CAP_SM_PS_SHIFT;
316 break;
317 case IEEE80211_SMPS_STATIC:
318 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
319 IEEE80211_HT_CAP_SM_PS_SHIFT;
320 break;
321 case IEEE80211_SMPS_DYNAMIC:
322 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
323 IEEE80211_HT_CAP_SM_PS_SHIFT;
324 break;
325 }
326
327 /* reserve and fill IE */
328 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
329 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
330}
331
d545daba
MP		 332static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
333 struct sk_buff *skb,
334 struct ieee80211_supported_band *sband)
335{
336 u8 *pos;
337 u32 cap;
338 struct ieee80211_sta_vht_cap vht_cap;
339
340 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
341
342 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
343
344 /* determine capability flags */
345 cap = vht_cap.cap;
346
347 /* reserve and fill IE */
348 pos = skb_put(skb, sizeof(struct ieee80211_vht_capabilities) + 2);
349 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
350}
351
66e67e41
JB		 352static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
353{
354 struct ieee80211_local *local = sdata->local;
355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
356 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
357 struct sk_buff *skb;
358 struct ieee80211_mgmt *mgmt;
359 u8 *pos, qos_info;
360 size_t offset = 0, noffset;
361 int i, count, rates_len, supp_rates_len;
362 u16 capab;
363 struct ieee80211_supported_band *sband;
364 u32 rates = 0;
66e67e41
JB		 365
366 lockdep_assert_held(&ifmgd->mtx);
367
368 sband = local->hw.wiphy->bands[local->oper_channel->band];
369
370 if (assoc_data->supp_rates_len) {
371 /*
372 * Get all rates supported by the device and the AP as
373 * some APs don't like getting a superset of their rates
374 * in the association request (e.g. D-Link DAP 1353 in
375 * b-only mode)...
376 */
377 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
378 assoc_data->supp_rates_len,
379 sband, &rates);
380 } else {
381 /*
382 * In case AP not provide any supported rates information
383 * before association, we send information element(s) with
384 * all rates that we support.
385 */
386 rates = ~0;
387 rates_len = sband->n_bitrates;
388 }
389
390 skb = alloc_skb(local->hw.extra_tx_headroom +
391 sizeof(*mgmt) + /* bit too much but doesn't matter */
392 2 + assoc_data->ssid_len + /* SSID */
393 4 + rates_len + /* (extended) rates */
394 4 + /* power capability */
395 2 + 2 * sband->n_channels + /* supported channels */
396 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d545daba 397 2 + sizeof(struct ieee80211_vht_capabilities) + /* VHT */
66e67e41
JB		 398 assoc_data->ie_len + /* extra IEs */
399 9, /* WMM */
400 GFP_KERNEL);
401 if (!skb)
402 return;
403
404 skb_reserve(skb, local->hw.extra_tx_headroom);
405
406 capab = WLAN_CAPABILITY_ESS;
407
408 if (sband->band == IEEE80211_BAND_2GHZ) {
409 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
410 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
411 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
412 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
413 }
414
415 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
416 capab |= WLAN_CAPABILITY_PRIVACY;
417
418 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
419 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
420 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
421
422 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
423 memset(mgmt, 0, 24);
424 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
425 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
426 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
427
428 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
429 skb_put(skb, 10);
430 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
431 IEEE80211_STYPE_REASSOC_REQ);
432 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
433 mgmt->u.reassoc_req.listen_interval =
434 cpu_to_le16(local->hw.conf.listen_interval);
435 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
436 ETH_ALEN);
437 } else {
438 skb_put(skb, 4);
439 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
440 IEEE80211_STYPE_ASSOC_REQ);
441 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
442 mgmt->u.assoc_req.listen_interval =
443 cpu_to_le16(local->hw.conf.listen_interval);
444 }
445
446 /* SSID */
447 pos = skb_put(skb, 2 + assoc_data->ssid_len);
448 *pos++ = WLAN_EID_SSID;
449 *pos++ = assoc_data->ssid_len;
450 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
451
452 /* add all rates which were marked to be used above */
453 supp_rates_len = rates_len;
454 if (supp_rates_len > 8)
455 supp_rates_len = 8;
456
457 pos = skb_put(skb, supp_rates_len + 2);
458 *pos++ = WLAN_EID_SUPP_RATES;
459 *pos++ = supp_rates_len;
460
461 count = 0;
462 for (i = 0; i < sband->n_bitrates; i++) {
463 if (BIT(i) & rates) {
464 int rate = sband->bitrates[i].bitrate;
465 *pos++ = (u8) (rate / 5);
466 if (++count == 8)
467 break;
468 }
469 }
470
471 if (rates_len > count) {
472 pos = skb_put(skb, rates_len - count + 2);
473 *pos++ = WLAN_EID_EXT_SUPP_RATES;
474 *pos++ = rates_len - count;
475
476 for (i++; i < sband->n_bitrates; i++) {
477 if (BIT(i) & rates) {
478 int rate = sband->bitrates[i].bitrate;
479 *pos++ = (u8) (rate / 5);
480 }
481 }
482 }
483
484 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
485 /* 1. power capabilities */
486 pos = skb_put(skb, 4);
487 *pos++ = WLAN_EID_PWR_CAPABILITY;
488 *pos++ = 2;
489 *pos++ = 0; /* min tx power */
490 *pos++ = local->oper_channel->max_power; /* max tx power */
491
492 /* 2. supported channels */
493 /* TODO: get this in reg domain format */
494 pos = skb_put(skb, 2 * sband->n_channels + 2);
495 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
496 *pos++ = 2 * sband->n_channels;
497 for (i = 0; i < sband->n_channels; i++) {
498 *pos++ = ieee80211_frequency_to_channel(
499 sband->channels[i].center_freq);
500 *pos++ = 1; /* one channel in the subband*/
501 }
502 }
503
504 /* if present, add any custom IEs that go before HT */
505 if (assoc_data->ie_len && assoc_data->ie) {
506 static const u8 before_ht[] = {
507 WLAN_EID_SSID,
508 WLAN_EID_SUPP_RATES,
509 WLAN_EID_EXT_SUPP_RATES,
510 WLAN_EID_PWR_CAPABILITY,
511 WLAN_EID_SUPPORTED_CHANNELS,
512 WLAN_EID_RSN,
513 WLAN_EID_QOS_CAPA,
514 WLAN_EID_RRM_ENABLED_CAPABILITIES,
515 WLAN_EID_MOBILITY_DOMAIN,
516 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
517 };
518 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
519 before_ht, ARRAY_SIZE(before_ht),
520 offset);
521 pos = skb_put(skb, noffset - offset);
522 memcpy(pos, assoc_data->ie + offset, noffset - offset);
523 offset = noffset;
524 }
525
4e74bfdb 526 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
9dde6423 527 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
66e67e41
JB		 528 sband, local->oper_channel, ifmgd->ap_smps);
529
d545daba
MP		 530 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
531 ieee80211_add_vht_ie(sdata, skb, sband);
532
66e67e41
JB		 533 /* if present, add any custom non-vendor IEs that go after HT */
534 if (assoc_data->ie_len && assoc_data->ie) {
535 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
536 assoc_data->ie_len,
537 offset);
538 pos = skb_put(skb, noffset - offset);
539 memcpy(pos, assoc_data->ie + offset, noffset - offset);
540 offset = noffset;
541 }
542
76f0303d
JB		 543 if (assoc_data->wmm) {
544 if (assoc_data->uapsd) {
dc41e4d4
EP		 545 qos_info = ifmgd->uapsd_queues;
546 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 547 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
548 } else {
549 qos_info = 0;
550 }
551
552 pos = skb_put(skb, 9);
553 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
554 *pos++ = 7; /* len */
555 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
556 *pos++ = 0x50;
557 *pos++ = 0xf2;
558 *pos++ = 2; /* WME */
559 *pos++ = 0; /* WME info */
560 *pos++ = 1; /* WME ver */
561 *pos++ = qos_info;
562 }
563
564 /* add any remaining custom (i.e. vendor specific here) IEs */
565 if (assoc_data->ie_len && assoc_data->ie) {
566 noffset = assoc_data->ie_len;
567 pos = skb_put(skb, noffset - offset);
568 memcpy(pos, assoc_data->ie + offset, noffset - offset);
569 }
570
a1845fc7
JB		 571 drv_mgd_prepare_tx(local, sdata);
572
66e67e41
JB		 573 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
574 ieee80211_tx_skb(sdata, skb);
575}
576
ef422bc0 577static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 578 const u8 *bssid, u16 stype,
5fef7dbc
JB		 579 u16 reason, bool send_frame,
580 u8 *frame_buf)
9ac19a90
JB		 581{
582 struct ieee80211_local *local = sdata->local;
46900298 583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 584 struct sk_buff *skb;
5fef7dbc 585 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 586
5fef7dbc
JB		 587 /* build frame */
588 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
589 mgmt->duration = 0; /* initialize only */
590 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 591 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 592 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 593 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 594 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 595 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
596
5fef7dbc
JB		 597 if (send_frame) {
598 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
599 DEAUTH_DISASSOC_LEN);
600 if (!skb)
601 return;
d5cdfacb 602
5fef7dbc
JB		 603 skb_reserve(skb, local->hw.extra_tx_headroom);
604
605 /* copy in frame */
606 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
607 mgmt, DEAUTH_DISASSOC_LEN);
608
609 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
610 IEEE80211_SKB_CB(skb)->flags |=
611 IEEE80211_TX_INTFL_DONT_ENCRYPT;
a1845fc7 612
d5cdfacb 613 ieee80211_tx_skb(sdata, skb);
5fef7dbc 614 }
9ac19a90
JB		 615}
616
572e0012
KV		 617void ieee80211_send_pspoll(struct ieee80211_local *local,
618 struct ieee80211_sub_if_data *sdata)
619{
572e0012
KV		 620 struct ieee80211_pspoll *pspoll;
621 struct sk_buff *skb;
572e0012 622
d8cd189e
KV		 623 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
624 if (!skb)
572e0012 625 return;
572e0012 626
d8cd189e
KV		 627 pspoll = (struct ieee80211_pspoll *) skb->data;
628 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 629
62ae67be
JB		 630 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
631 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 632}
633
965bedad
JB		 634void ieee80211_send_nullfunc(struct ieee80211_local *local,
635 struct ieee80211_sub_if_data *sdata,
636 int powersave)
637{
638 struct sk_buff *skb;
d8cd189e 639 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 641
d8cd189e
KV		 642 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
643 if (!skb)
965bedad 644 return;
965bedad 645
d8cd189e 646 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 647 if (powersave)
d8cd189e 648 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 649
62ae67be 650 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 651 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
652 IEEE80211_STA_CONNECTION_POLL))
653 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
654
62ae67be 655 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 656}
657
d524215f
FF		 658static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
659 struct ieee80211_sub_if_data *sdata)
660{
661 struct sk_buff *skb;
662 struct ieee80211_hdr *nullfunc;
663 __le16 fc;
664
665 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
666 return;
667
668 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 669 if (!skb)
d524215f 670 return;
d15b8459 671
d524215f
FF		 672 skb_reserve(skb, local->hw.extra_tx_headroom);
673
674 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
675 memset(nullfunc, 0, 30);
676 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
677 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
678 nullfunc->frame_control = fc;
679 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
680 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
681 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
682 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
683
684 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
685 ieee80211_tx_skb(sdata, skb);
686}
687
cc32abd4
JB		 688/* spectrum management related things */
689static void ieee80211_chswitch_work(struct work_struct *work)
690{
691 struct ieee80211_sub_if_data *sdata =
692 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
694
9607e6b6 695 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 696 return;
697
77fdaa12
JB		 698 mutex_lock(&ifmgd->mtx);
699 if (!ifmgd->associated)
700 goto out;
cc32abd4
JB		 701
702 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 703 if (!sdata->local->ops->channel_switch) {
704 /* call "hw_config" only if doing sw channel switch */
705 ieee80211_hw_config(sdata->local,
706 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 707 } else {
708 /* update the device channel directly */
709 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 710 }
77fdaa12 711
cc32abd4 712 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 713 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 714
57eebdf3 715 /* XXX: wait for a beacon first? */
cc32abd4
JB		 716 ieee80211_wake_queues_by_reason(&sdata->local->hw,
717 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 718 out:
719 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
720 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 721}
722
5ce6e438
JB		 723void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
724{
725 struct ieee80211_sub_if_data *sdata;
726 struct ieee80211_if_managed *ifmgd;
727
728 sdata = vif_to_sdata(vif);
729 ifmgd = &sdata->u.mgd;
730
731 trace_api_chswitch_done(sdata, success);
732 if (!success) {
882a7c69
JB		 733 sdata_info(sdata,
734 "driver channel switch failed, disconnecting\n");
735 ieee80211_queue_work(&sdata->local->hw,
736 &ifmgd->csa_connection_drop_work);
737 } else {
738 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 739 }
5ce6e438
JB		 740}
741EXPORT_SYMBOL(ieee80211_chswitch_done);
742
cc32abd4
JB		 743static void ieee80211_chswitch_timer(unsigned long data)
744{
745 struct ieee80211_sub_if_data *sdata =
746 (struct ieee80211_sub_if_data *) data;
747 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
748
5bb644a0
JB		 749 if (sdata->local->quiescing) {
750 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
751 return;
752 }
753
42935eca 754 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 755}
756
757void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
758 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 759 struct ieee80211_bss *bss,
760 u64 timestamp)
cc32abd4 761{
0c1ad2ca
JB		 762 struct cfg80211_bss *cbss =
763 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 764 struct ieee80211_channel *new_ch;
765 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 766 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
767 cbss->channel->band);
cc32abd4 768
77fdaa12
JB		 769 ASSERT_MGD_MTX(ifmgd);
770
771 if (!ifmgd->associated)
cc32abd4
JB		 772 return;
773
fbe9c429 774 if (sdata->local->scanning)
cc32abd4
JB		 775 return;
776
777 /* Disregard subsequent beacons if we are already running a timer
778 processing a CSA */
779
780 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
781 return;
782
783 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 784 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
785 sdata_info(sdata,
786 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
787 ifmgd->associated->bssid, new_freq);
788 ieee80211_queue_work(&sdata->local->hw,
789 &ifmgd->csa_connection_drop_work);
cc32abd4 790 return;
882a7c69 791 }
cc32abd4
JB		 792
793 sdata->local->csa_channel = new_ch;
794
57eebdf3
JB		 795 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
796
797 if (sw_elem->mode)
798 ieee80211_stop_queues_by_reason(&sdata->local->hw,
799 IEEE80211_QUEUE_STOP_REASON_CSA);
800
5ce6e438
JB		 801 if (sdata->local->ops->channel_switch) {
802 /* use driver's channel switch callback */
57eebdf3
JB		 803 struct ieee80211_channel_switch ch_switch = {
804 .timestamp = timestamp,
805 .block_tx = sw_elem->mode,
806 .channel = new_ch,
807 .count = sw_elem->count,
808 };
809
5ce6e438
JB		 810 drv_channel_switch(sdata->local, &ch_switch);
811 return;
812 }
813
814 /* channel switch handled in software */
57eebdf3 815 if (sw_elem->count <= 1)
42935eca 816 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 817 else
cc32abd4 818 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 819 TU_TO_EXP_TIME(sw_elem->count *
820 cbss->beacon_interval));
cc32abd4
JB		 821}
822
823static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
761a48d2 824 u16 capab_info, u8 *pwr_constr_elem)
cc32abd4
JB		 825{
826 struct ieee80211_conf *conf = &sdata->local->hw.conf;
827
828 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
829 return;
830
a48b13ac 831 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 832 (*pwr_constr_elem != sdata->local->power_constr_level)) {
833 sdata->local->power_constr_level = *pwr_constr_elem;
834 ieee80211_hw_config(sdata->local, 0);
835 }
836}
837
f90754c1
JO		 838void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
839{
840 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
841 struct ieee80211_local *local = sdata->local;
842 struct ieee80211_conf *conf = &local->hw.conf;
843
844 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
845 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
846 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
847
848 local->disable_dynamic_ps = false;
849 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
850}
851EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
852
853void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
854{
855 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
856 struct ieee80211_local *local = sdata->local;
857 struct ieee80211_conf *conf = &local->hw.conf;
858
859 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
860 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
861 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
862
863 local->disable_dynamic_ps = true;
864 conf->dynamic_ps_timeout = 0;
865 del_timer_sync(&local->dynamic_ps_timer);
866 ieee80211_queue_work(&local->hw,
867 &local->dynamic_ps_enable_work);
868}
869EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
870
965bedad
JB		 871/* powersave */
872static void ieee80211_enable_ps(struct ieee80211_local *local,
873 struct ieee80211_sub_if_data *sdata)
874{
875 struct ieee80211_conf *conf = &local->hw.conf;
876
d5edaedc
JB		 877 /*
878 * If we are scanning right now then the parameters will
879 * take effect when scan finishes.
880 */
fbe9c429 881 if (local->scanning)
d5edaedc
JB		 882 return;
883
965bedad
JB		 884 if (conf->dynamic_ps_timeout > 0 &&
885 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
886 mod_timer(&local->dynamic_ps_timer, jiffies +
887 msecs_to_jiffies(conf->dynamic_ps_timeout));
888 } else {
889 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
890 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 891
2a13052f
JO		 892 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
893 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
894 return;
895
896 conf->flags |= IEEE80211_CONF_PS;
897 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 898 }
899}
900
901static void ieee80211_change_ps(struct ieee80211_local *local)
902{
903 struct ieee80211_conf *conf = &local->hw.conf;
904
905 if (local->ps_sdata) {
965bedad
JB		 906 ieee80211_enable_ps(local, local->ps_sdata);
907 } else if (conf->flags & IEEE80211_CONF_PS) {
908 conf->flags &= ~IEEE80211_CONF_PS;
909 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
910 del_timer_sync(&local->dynamic_ps_timer);
911 cancel_work_sync(&local->dynamic_ps_enable_work);
912 }
913}
914
808118cb
JY		 915static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
916{
917 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
918 struct sta_info *sta = NULL;
c2c98fde 919 bool authorized = false;
808118cb
JY		 920
921 if (!mgd->powersave)
922 return false;
923
05cb9108
JB		 924 if (mgd->broken_ap)
925 return false;
926
808118cb
JY		 927 if (!mgd->associated)
928 return false;
929
808118cb
JY		 930 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
931 IEEE80211_STA_CONNECTION_POLL))
932 return false;
933
934 rcu_read_lock();
935 sta = sta_info_get(sdata, mgd->bssid);
936 if (sta)
c2c98fde 937 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 938 rcu_read_unlock();
939
c2c98fde 940 return authorized;
808118cb
JY		 941}
942
965bedad 943/* need to hold RTNL or interface lock */
10f644a4 944void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 945{
946 struct ieee80211_sub_if_data *sdata, *found = NULL;
947 int count = 0;
195e294d 948 int timeout;
965bedad
JB		 949
950 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
951 local->ps_sdata = NULL;
952 return;
953 }
954
955 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 956 if (!ieee80211_sdata_running(sdata))
965bedad 957 continue;
8c7914de
RM		 958 if (sdata->vif.type == NL80211_IFTYPE_AP) {
959 /* If an AP vif is found, then disable PS
960 * by setting the count to zero thereby setting
961 * ps_sdata to NULL.
962 */
963 count = 0;
964 break;
965 }
965bedad
JB		 966 if (sdata->vif.type != NL80211_IFTYPE_STATION)
967 continue;
968 found = sdata;
969 count++;
970 }
971
808118cb 972 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 973 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 974 s32 beaconint_us;
975
976 if (latency < 0)
ed77134b 977 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 978
979 beaconint_us = ieee80211_tu_to_usec(
980 found->vif.bss_conf.beacon_int);
981
ff616381 982 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 983 if (timeout < 0) {
984 /*
ff616381
JO		 985 * Go to full PSM if the user configures a very low
986 * latency requirement.
0ab82b04
EP		 987 * The 2000 second value is there for compatibility
988 * until the PM_QOS_NETWORK_LATENCY is configured
989 * with real values.
195e294d 990 */
0ab82b04
EP		 991 if (latency > (1900 * USEC_PER_MSEC) &&
992 latency != (2000 * USEC_PER_SEC))
195e294d 993 timeout = 0;
ff616381
JO		 994 else
995 timeout = 100;
195e294d 996 }
f90754c1
JO		 997 local->dynamic_ps_user_timeout = timeout;
998 if (!local->disable_dynamic_ps)
999 conf->dynamic_ps_timeout =
1000 local->dynamic_ps_user_timeout;
195e294d 1001
04fe2037 1002 if (beaconint_us > latency) {
10f644a4 1003 local->ps_sdata = NULL;
04fe2037 1004 } else {
56007a02 1005 struct ieee80211_bss *bss;
04fe2037 1006 int maxslp = 1;
56007a02 1007 u8 dtimper;
04fe2037 1008
56007a02
JB		 1009 bss = (void *)found->u.mgd.associated->priv;
1010 dtimper = bss->dtim_period;
1011
1012 /* If the TIM IE is invalid, pretend the value is 1 */
1013 if (!dtimper)
1014 dtimper = 1;
1015 else if (dtimper > 1)
04fe2037
JB		 1016 maxslp = min_t(int, dtimper,
1017 latency / beaconint_us);
1018
9ccebe61 1019 local->hw.conf.max_sleep_period = maxslp;
56007a02 1020 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1021 local->ps_sdata = found;
04fe2037 1022 }
10f644a4 1023 } else {
965bedad 1024 local->ps_sdata = NULL;
10f644a4 1025 }
965bedad
JB		 1026
1027 ieee80211_change_ps(local);
1028}
1029
ab095877
EP		 1030void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1031{
1032 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1033
1034 if (sdata->vif.bss_conf.ps != ps_allowed) {
1035 sdata->vif.bss_conf.ps = ps_allowed;
1036 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1037 }
1038}
1039
965bedad
JB		 1040void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1041{
1042 struct ieee80211_local *local =
1043 container_of(work, struct ieee80211_local,
1044 dynamic_ps_disable_work);
1045
1046 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1047 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1048 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1049 }
1050
1051 ieee80211_wake_queues_by_reason(&local->hw,
1052 IEEE80211_QUEUE_STOP_REASON_PS);
1053}
1054
1055void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1056{
1057 struct ieee80211_local *local =
1058 container_of(work, struct ieee80211_local,
1059 dynamic_ps_enable_work);
1060 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1061 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1062 unsigned long flags;
1063 int q;
965bedad
JB		 1064
1065 /* can only happen when PS was just disabled anyway */
1066 if (!sdata)
1067 return;
1068
5e34069c
CL		 1069 ifmgd = &sdata->u.mgd;
1070
965bedad
JB		 1071 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1072 return;
1073
77b7023a
AN		 1074 if (!local->disable_dynamic_ps &&
1075 local->hw.conf.dynamic_ps_timeout > 0) {
1076 /* don't enter PS if TX frames are pending */
1077 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1078 mod_timer(&local->dynamic_ps_timer, jiffies +
1079 msecs_to_jiffies(
1080 local->hw.conf.dynamic_ps_timeout));
1081 return;
1082 }
77b7023a
AN		 1083
1084 /*
1085 * transmission can be stopped by others which leads to
1086 * dynamic_ps_timer expiry. Postpone the ps timer if it
1087 * is not the actual idle state.
1088 */
1089 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1090 for (q = 0; q < local->hw.queues; q++) {
1091 if (local->queue_stop_reasons[q]) {
1092 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1093 flags);
1094 mod_timer(&local->dynamic_ps_timer, jiffies +
1095 msecs_to_jiffies(
1096 local->hw.conf.dynamic_ps_timeout));
1097 return;
1098 }
1099 }
1100 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1101 }
1ddc2867 1102
375177bf 1103 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1104 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1105 netif_tx_stop_all_queues(sdata->dev);
965bedad 1106
e8306f98
VN		 1107 if (drv_tx_frames_pending(local))
1108 mod_timer(&local->dynamic_ps_timer, jiffies +
1109 msecs_to_jiffies(
1110 local->hw.conf.dynamic_ps_timeout));
1111 else {
1112 ieee80211_send_nullfunc(local, sdata, 1);
1113 /* Flush to get the tx status of nullfunc frame */
1114 drv_flush(local, false);
1115 }
f3e85b9e
VN		 1116 }
1117
2a13052f
JO		 1118 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1119 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1120 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1121 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1122 local->hw.conf.flags |= IEEE80211_CONF_PS;
1123 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1124 }
f3e85b9e 1125
77b7023a
AN		 1126 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1127 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1128}
1129
1130void ieee80211_dynamic_ps_timer(unsigned long data)
1131{
1132 struct ieee80211_local *local = (void *) data;
1133
78f1a8b7 1134 if (local->quiescing || local->suspended)
5bb644a0
JB		 1135 return;
1136
42935eca 1137 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1138}
1139
60f8b39c 1140/* MLME */
7d25745d 1141static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1142 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1143 u8 *wmm_param, size_t wmm_param_len)
1144{
f0706e82 1145 struct ieee80211_tx_queue_params params;
4ced3f74 1146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1147 size_t left;
1148 int count;
ab13315a 1149 u8 *pos, uapsd_queues = 0;
f0706e82 1150
e1b3ec1a 1151 if (!local->ops->conf_tx)
7d25745d 1152 return false;
e1b3ec1a 1153
32c5057b 1154 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1155 return false;
3434fbd3
JB		 1156
1157 if (!wmm_param)
7d25745d 1158 return false;
3434fbd3 1159
f0706e82 1160 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1161 return false;
ab13315a
KV		 1162
1163 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1164 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1165
f0706e82 1166 count = wmm_param[6] & 0x0f;
46900298 1167 if (count == ifmgd->wmm_last_param_set)
7d25745d 1168 return false;
46900298 1169 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1170
1171 pos = wmm_param + 8;
1172 left = wmm_param_len - 8;
1173
1174 memset(&params, 0, sizeof(params));
1175
00e96dec 1176 sdata->wmm_acm = 0;
f0706e82
JB		 1177 for (; left >= 4; left -= 4, pos += 4) {
1178 int aci = (pos[0] >> 5) & 0x03;
1179 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1180 bool uapsd = false;
f0706e82
JB		 1181 int queue;
1182
1183 switch (aci) {
0eeb59fe 1184 case 1: /* AC_BK */
e100bb64 1185 queue = 3;
988c0f72 1186 if (acm)
00e96dec 1187 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1188 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1189 uapsd = true;
f0706e82 1190 break;
0eeb59fe 1191 case 2: /* AC_VI */
e100bb64 1192 queue = 1;
988c0f72 1193 if (acm)
00e96dec 1194 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1195 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1196 uapsd = true;
f0706e82 1197 break;
0eeb59fe 1198 case 3: /* AC_VO */
e100bb64 1199 queue = 0;
988c0f72 1200 if (acm)
00e96dec 1201 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1202 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1203 uapsd = true;
f0706e82 1204 break;
0eeb59fe 1205 case 0: /* AC_BE */
f0706e82 1206 default:
e100bb64 1207 queue = 2;
988c0f72 1208 if (acm)
00e96dec 1209 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1210 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1211 uapsd = true;
f0706e82
JB		 1212 break;
1213 }
1214
1215 params.aifs = pos[0] & 0x0f;
1216 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1217 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1218 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1219 params.uapsd = uapsd;
1220
bdcbd8e0
JB		 1221 mlme_dbg(sdata,
1222 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1223 queue, aci, acm,
1224 params.aifs, params.cw_min, params.cw_max,
1225 params.txop, params.uapsd);
f6f3def3
EP		 1226 sdata->tx_conf[queue] = params;
1227 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1228 sdata_err(sdata,
1229 "failed to set TX queue parameters for queue %d\n",
1230 queue);
f0706e82 1231 }
e1b3ec1a
SG		 1232
1233 /* enable WMM or activate new settings */
4ced3f74 1234 sdata->vif.bss_conf.qos = true;
7d25745d 1235 return true;
f0706e82
JB		 1236}
1237
925e64c3
SG		 1238static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1239{
1240 lockdep_assert_held(&sdata->local->mtx);
1241
1242 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1243 IEEE80211_STA_BEACON_POLL);
1244 ieee80211_run_deferred_scan(sdata->local);
1245}
1246
1247static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1248{
1249 mutex_lock(&sdata->local->mtx);
1250 __ieee80211_stop_poll(sdata);
1251 mutex_unlock(&sdata->local->mtx);
1252}
1253
7a5158ef
JB		 1254static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1255 u16 capab, bool erp_valid, u8 erp)
5628221c 1256{
bda3933a 1257 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1258 u32 changed = 0;
7a5158ef
JB		 1259 bool use_protection;
1260 bool use_short_preamble;
1261 bool use_short_slot;
1262
1263 if (erp_valid) {
1264 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1265 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1266 } else {
1267 use_protection = false;
1268 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1269 }
1270
1271 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
568d6e28 1272 if (sdata->local->oper_channel->band == IEEE80211_BAND_5GHZ)
43d35343 1273 use_short_slot = true;
5628221c 1274
471b3efd 1275 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1276 bss_conf->use_cts_prot = use_protection;
1277 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1278 }
7e9ed188 1279
d43c7b37 1280 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1281 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1282 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1283 }
d9430a32 1284
7a5158ef 1285 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1286 bss_conf->use_short_slot = use_short_slot;
1287 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1288 }
1289
1290 return changed;
1291}
1292
f698d856 1293static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1294 struct cfg80211_bss *cbss,
ae5eb026 1295 u32 bss_info_changed)
f0706e82 1296{
0c1ad2ca 1297 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1298 struct ieee80211_local *local = sdata->local;
68542962 1299 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1300
ae5eb026 1301 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1302 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1303 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1304
7ccc8bd7
FF		 1305 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1306 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1307
0c1ad2ca
JB		 1308 sdata->u.mgd.associated = cbss;
1309 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1310
17e4ec14
JM		 1311 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1312
b291ba11 1313 /* just to be sure */
925e64c3 1314 ieee80211_stop_poll(sdata);
b291ba11 1315
9ac19a90 1316 ieee80211_led_assoc(local, 1);
9306102e 1317
e5b900d2
JB		 1318 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1319 bss_conf->dtim_period = bss->dtim_period;
1320 else
1321 bss_conf->dtim_period = 0;
1322
68542962 1323 bss_conf->assoc = 1;
9cef8737 1324
a97c13c3 1325 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1326 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1327 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1328 bss_info_changed |= BSS_CHANGED_CQM;
1329
68542962
JO		 1330 /* Enable ARP filtering */
1331 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1332 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1333 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1334 }
1335
ae5eb026 1336 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1337
056508dc
JB		 1338 mutex_lock(&local->iflist_mtx);
1339 ieee80211_recalc_ps(local, -1);
025e6be2 1340 ieee80211_recalc_smps(local);
056508dc 1341 mutex_unlock(&local->iflist_mtx);
e0cb686f 1342
ab095877
EP		 1343 ieee80211_recalc_ps_vif(sdata);
1344
8a5b33f5 1345 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1346 netif_carrier_on(sdata->dev);
f0706e82
JB		 1347}
1348
e69e95db 1349static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1350 u16 stype, u16 reason, bool tx,
1351 u8 *frame_buf)
aa458d17 1352{
46900298 1353 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1354 struct ieee80211_local *local = sdata->local;
1355 struct sta_info *sta;
3cc5240b 1356 u32 changed = 0;
aa458d17 1357
77fdaa12
JB		 1358 ASSERT_MGD_MTX(ifmgd);
1359
37ad3888
JB		 1360 if (WARN_ON_ONCE(tx && !frame_buf))
1361 return;
1362
b291ba11
JB		 1363 if (WARN_ON(!ifmgd->associated))
1364 return;
1365
79543d8e
DS		 1366 ieee80211_stop_poll(sdata);
1367
77fdaa12 1368 ifmgd->associated = NULL;
77fdaa12
JB		 1369
1370 /*
1371 * we need to commit the associated = NULL change because the
1372 * scan code uses that to determine whether this iface should
1373 * go to/wake up from powersave or not -- and could otherwise
1374 * wake the queues erroneously.
1375 */
1376 smp_mb();
1377
1378 /*
1379 * Thus, we can only afterwards stop the queues -- to account
1380 * for the case where another CPU is finishing a scan at this
1381 * time -- we don't want the scan code to enable queues.
1382 */
aa458d17 1383
8a5b33f5 1384 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1385 netif_carrier_off(sdata->dev);
1386
2a419056 1387 mutex_lock(&local->sta_mtx);
88a9e31c 1388 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1389 if (sta) {
c2c98fde 1390 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1391 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1392 }
2a419056 1393 mutex_unlock(&local->sta_mtx);
aa458d17 1394
88bc40e8
EP		 1395 /*
1396 * if we want to get out of ps before disassoc (why?) we have
1397 * to do it before sending disassoc, as otherwise the null-packet
1398 * won't be valid.
1399 */
1400 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1401 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1402 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1403 }
1404 local->ps_sdata = NULL;
1405
ab095877
EP		 1406 /* disable per-vif ps */
1407 ieee80211_recalc_ps_vif(sdata);
1408
f823981e
EP		 1409 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1410 if (tx)
1411 drv_flush(local, false);
1412
37ad3888
JB		 1413 /* deauthenticate/disassociate now */
1414 if (tx || frame_buf)
88a9e31c
EP		 1415 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1416 reason, tx, frame_buf);
37ad3888
JB		 1417
1418 /* flush out frame */
1419 if (tx)
1420 drv_flush(local, false);
1421
88a9e31c
EP		 1422 /* clear bssid only after building the needed mgmt frames */
1423 memset(ifmgd->bssid, 0, ETH_ALEN);
1424
37ad3888
JB		 1425 /* remove AP and TDLS peers */
1426 sta_info_flush(local, sdata);
1427
1428 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1429 changed |= ieee80211_reset_erp_info(sdata);
1430
f5e5bf25 1431 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1432 changed |= BSS_CHANGED_ASSOC;
1433 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1434
413ad50a 1435 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1436 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1437 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1438
a8302de9
VT		 1439 local->power_constr_level = 0;
1440
520eb820
KV		 1441 del_timer_sync(&local->dynamic_ps_timer);
1442 cancel_work_sync(&local->dynamic_ps_enable_work);
1443
68542962
JO		 1444 /* Disable ARP filtering */
1445 if (sdata->vif.bss_conf.arp_filter_enabled) {
1446 sdata->vif.bss_conf.arp_filter_enabled = false;
1447 changed |= BSS_CHANGED_ARP_FILTER;
1448 }
1449
3abead59
JB		 1450 sdata->vif.bss_conf.qos = false;
1451 changed |= BSS_CHANGED_QOS;
1452
0aaffa9b
JB		 1453 /* The BSSID (not really interesting) and HT changed */
1454 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1455 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1456
3cc5240b
JB		 1457 /* channel(_type) changes are handled by ieee80211_hw_config */
1458 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1459 ieee80211_hw_config(local, 0);
1460
3abead59
JB		 1461 /* disassociated - set to defaults now */
1462 ieee80211_set_wmm_default(sdata, false);
1463
b9dcf712
JB		 1464 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1465 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1466 del_timer_sync(&sdata->u.mgd.timer);
1467 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1468
1469 sdata->u.mgd.timers_running = 0;
aa458d17 1470}
f0706e82 1471
3cf335d5
KV		 1472void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1473 struct ieee80211_hdr *hdr)
1474{
1475 /*
1476 * We can postpone the mgd.timer whenever receiving unicast frames
1477 * from AP because we know that the connection is working both ways
1478 * at that time. But multicast frames (and hence also beacons) must
1479 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1480 * data idle periods for sending the periodic probe request to the
1481 * AP we're connected to.
3cf335d5 1482 */
b291ba11
JB		 1483 if (is_multicast_ether_addr(hdr->addr1))
1484 return;
1485
be099e82 1486 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1487}
f0706e82 1488
4e5ff376
FF		 1489static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1490{
1491 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1492 struct ieee80211_local *local = sdata->local;
4e5ff376 1493
133d40f9 1494 mutex_lock(&local->mtx);
4e5ff376 1495 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1496 IEEE80211_STA_CONNECTION_POLL))) {
1497 mutex_unlock(&local->mtx);
1498 return;
1499 }
4e5ff376 1500
925e64c3 1501 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1502
1503 mutex_lock(&local->iflist_mtx);
1504 ieee80211_recalc_ps(local, -1);
1505 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1506
1507 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1508 goto out;
4e5ff376
FF		 1509
1510 /*
1511 * We've received a probe response, but are not sure whether
1512 * we have or will be receiving any beacons or data, so let's
1513 * schedule the timers again, just in case.
1514 */
1515 ieee80211_sta_reset_beacon_monitor(sdata);
1516
1517 mod_timer(&ifmgd->conn_mon_timer,
1518 round_jiffies_up(jiffies +
1519 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1520out:
133d40f9 1521 mutex_unlock(&local->mtx);
4e5ff376
FF		 1522}
1523
1524void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1525 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1526{
75706d0e 1527 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1528 return;
1529
04ac3c0e
FF		 1530 if (ack)
1531 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1532
1533 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1534 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1535 if (ack)
1536 sdata->u.mgd.probe_send_count = 0;
1537 else
1538 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1539 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1540 }
1541}
1542
a43abf29
ML		 1543static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1544{
1545 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1546 const u8 *ssid;
f01a067d 1547 u8 *dst = ifmgd->associated->bssid;
180205bd 1548 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1549
1550 /*
1551 * Try sending broadcast probe requests for the last three
1552 * probe requests after the first ones failed since some
1553 * buggy APs only support broadcast probe requests.
1554 */
1555 if (ifmgd->probe_send_count >= unicast_limit)
1556 dst = NULL;
a43abf29 1557
4e5ff376
FF		 1558 /*
1559 * When the hardware reports an accurate Tx ACK status, it's
1560 * better to send a nullfunc frame instead of a probe request,
1561 * as it will kick us off the AP quickly if we aren't associated
1562 * anymore. The timeout will be reset if the frame is ACKed by
1563 * the AP.
1564 */
992e68bf
SD		 1565 ifmgd->probe_send_count++;
1566
04ac3c0e
FF		 1567 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1568 ifmgd->nullfunc_failed = false;
4e5ff376 1569 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1570 } else {
88c868c4
SG		 1571 int ssid_len;
1572
4e5ff376 1573 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1574 if (WARN_ON_ONCE(ssid == NULL))
1575 ssid_len = 0;
1576 else
1577 ssid_len = ssid[1];
1578
1579 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
fe94fe05
JB		 1580 0, (u32) -1, true, false,
1581 ifmgd->associated->channel);
4e5ff376 1582 }
a43abf29 1583
180205bd 1584 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1585 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1586 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1587 drv_flush(sdata->local, false);
a43abf29
ML		 1588}
1589
b291ba11
JB		 1590static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1591 bool beacon)
04de8381 1592{
04de8381 1593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1594 bool already = false;
34bfc411 1595
9607e6b6 1596 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1597 return;
1598
77fdaa12
JB		 1599 mutex_lock(&ifmgd->mtx);
1600
1601 if (!ifmgd->associated)
1602 goto out;
1603
133d40f9
SG		 1604 mutex_lock(&sdata->local->mtx);
1605
1606 if (sdata->local->tmp_channel || sdata->local->scanning) {
1607 mutex_unlock(&sdata->local->mtx);
1608 goto out;
1609 }
1610
e87cc472 1611 if (beacon)
bdcbd8e0
JB		 1612 mlme_dbg_ratelimited(sdata,
1613 "detected beacon loss from AP - sending probe request\n");
1614
6efb71b0
HS		 1615 ieee80211_cqm_rssi_notify(&sdata->vif,
1616 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1617
b291ba11
JB		 1618 /*
1619 * The driver/our work has already reported this event or the
1620 * connection monitoring has kicked in and we have already sent
1621 * a probe request. Or maybe the AP died and the driver keeps
1622 * reporting until we disassociate...
1623 *
1624 * In either case we have to ignore the current call to this
1625 * function (except for setting the correct probe reason bit)
1626 * because otherwise we would reset the timer every time and
1627 * never check whether we received a probe response!
1628 */
1629 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1630 IEEE80211_STA_CONNECTION_POLL))
1631 already = true;
1632
1633 if (beacon)
1634 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1635 else
1636 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1637
133d40f9
SG		 1638 mutex_unlock(&sdata->local->mtx);
1639
b291ba11
JB		 1640 if (already)
1641 goto out;
1642
4e751843
JB		 1643 mutex_lock(&sdata->local->iflist_mtx);
1644 ieee80211_recalc_ps(sdata->local, -1);
1645 mutex_unlock(&sdata->local->iflist_mtx);
1646
a43abf29
ML		 1647 ifmgd->probe_send_count = 0;
1648 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1649 out:
1650 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1651}
1652
a619a4c0
JO		 1653struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1654 struct ieee80211_vif *vif)
1655{
1656 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1658 struct cfg80211_bss *cbss;
a619a4c0
JO		 1659 struct sk_buff *skb;
1660 const u8 *ssid;
88c868c4 1661 int ssid_len;
a619a4c0
JO		 1662
1663 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1664 return NULL;
1665
1666 ASSERT_MGD_MTX(ifmgd);
1667
d9b3b28b
EP		 1668 if (ifmgd->associated)
1669 cbss = ifmgd->associated;
1670 else if (ifmgd->auth_data)
1671 cbss = ifmgd->auth_data->bss;
1672 else if (ifmgd->assoc_data)
1673 cbss = ifmgd->assoc_data->bss;
1674 else
a619a4c0
JO		 1675 return NULL;
1676
d9b3b28b 1677 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1678 if (WARN_ON_ONCE(ssid == NULL))
1679 ssid_len = 0;
1680 else
1681 ssid_len = ssid[1];
1682
d9b3b28b 1683 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
6b77863b
JB		 1684 (u32) -1,
1685 sdata->local->oper_channel,
1686 ssid + 2, ssid_len,
85a237fe 1687 NULL, 0, true);
a619a4c0
JO		 1688
1689 return skb;
1690}
1691EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1692
882a7c69
JB		 1693static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1694 bool transmit_frame)
1e4dcd01
JO		 1695{
1696 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1697 struct ieee80211_local *local = sdata->local;
5fef7dbc 1698 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1699
1700 mutex_lock(&ifmgd->mtx);
1701 if (!ifmgd->associated) {
1702 mutex_unlock(&ifmgd->mtx);
1703 return;
1704 }
1705
37ad3888
JB		 1706 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1707 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
882a7c69
JB		 1708 transmit_frame, frame_buf);
1709 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1710 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1711
1e4dcd01
JO		 1712 /*
1713 * must be outside lock due to cfg80211,
1714 * but that's not a problem.
1715 */
5fef7dbc 1716 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1717
1718 mutex_lock(&local->mtx);
1719 ieee80211_recalc_idle(local);
1720 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1721}
1722
cc74c0c7 1723static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1724{
1725 struct ieee80211_sub_if_data *sdata =
1726 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1727 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1729 struct sta_info *sta;
1730
1731 if (ifmgd->associated) {
30fa9047 1732 rcu_read_lock();
a85e1d55
PS		 1733 sta = sta_info_get(sdata, ifmgd->bssid);
1734 if (sta)
1735 sta->beacon_loss_count++;
30fa9047 1736 rcu_read_unlock();
a85e1d55 1737 }
b291ba11 1738
882a7c69
JB		 1739 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1740 sdata_info(sdata, "Connection to AP %pM lost\n",
1741 ifmgd->bssid);
1742 __ieee80211_disconnect(sdata, false);
1743 } else {
1e4dcd01 1744 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1745 }
1746}
1747
1748static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1749{
1750 struct ieee80211_sub_if_data *sdata =
1751 container_of(work, struct ieee80211_sub_if_data,
1752 u.mgd.csa_connection_drop_work);
1753
1754 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1755 IEEE80211_QUEUE_STOP_REASON_CSA);
1756 __ieee80211_disconnect(sdata, true);
b291ba11
JB		 1757}
1758
04de8381
KV		 1759void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1760{
1761 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1762 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1763
b5878a2d
JB		 1764 trace_api_beacon_loss(sdata);
1765
1e4dcd01
JO		 1766 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1767 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1768}
1769EXPORT_SYMBOL(ieee80211_beacon_loss);
1770
1e4dcd01
JO		 1771void ieee80211_connection_loss(struct ieee80211_vif *vif)
1772{
1773 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1774 struct ieee80211_hw *hw = &sdata->local->hw;
1775
b5878a2d
JB		 1776 trace_api_connection_loss(sdata);
1777
1e4dcd01
JO		 1778 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1779 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1780}
1781EXPORT_SYMBOL(ieee80211_connection_loss);
1782
1783
66e67e41
JB		 1784static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1785 bool assoc)
1786{
1787 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1788
1789 lockdep_assert_held(&sdata->u.mgd.mtx);
1790
66e67e41
JB		 1791 if (!assoc) {
1792 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1793
1794 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1795 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1796 }
1797
1798 cfg80211_put_bss(auth_data->bss);
1799 kfree(auth_data);
1800 sdata->u.mgd.auth_data = NULL;
1801}
1802
1803static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1804 struct ieee80211_mgmt *mgmt, size_t len)
1805{
1806 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1807 u8 *pos;
1808 struct ieee802_11_elems elems;
1809
1810 pos = mgmt->u.auth.variable;
1811 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1812 if (!elems.challenge)
1813 return;
1814 auth_data->expected_transaction = 4;
a1845fc7 1815 drv_mgd_prepare_tx(sdata->local, sdata);
66e67e41
JB		 1816 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1817 elems.challenge - 2, elems.challenge_len + 2,
1818 auth_data->bss->bssid, auth_data->bss->bssid,
1819 auth_data->key, auth_data->key_len,
1820 auth_data->key_idx);
1821}
1822
1823static enum rx_mgmt_action __must_check
1824ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1825 struct ieee80211_mgmt *mgmt, size_t len)
1826{
1827 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1828 u8 bssid[ETH_ALEN];
1829 u16 auth_alg, auth_transaction, status_code;
1830 struct sta_info *sta;
1831
1832 lockdep_assert_held(&ifmgd->mtx);
1833
1834 if (len < 24 + 6)
1835 return RX_MGMT_NONE;
1836
1837 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1838 return RX_MGMT_NONE;
1839
1840 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1841
b203ca39 1842 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1843 return RX_MGMT_NONE;
1844
1845 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1846 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1847 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1848
1849 if (auth_alg != ifmgd->auth_data->algorithm ||
1850 auth_transaction != ifmgd->auth_data->expected_transaction)
1851 return RX_MGMT_NONE;
1852
1853 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1854 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1855 mgmt->sa, status_code);
dac211ec
EP		 1856 ieee80211_destroy_auth_data(sdata, false);
1857 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1858 }
1859
1860 switch (ifmgd->auth_data->algorithm) {
1861 case WLAN_AUTH_OPEN:
1862 case WLAN_AUTH_LEAP:
1863 case WLAN_AUTH_FT:
1864 break;
1865 case WLAN_AUTH_SHARED_KEY:
1866 if (ifmgd->auth_data->expected_transaction != 4) {
1867 ieee80211_auth_challenge(sdata, mgmt, len);
1868 /* need another frame */
1869 return RX_MGMT_NONE;
1870 }
1871 break;
1872 default:
1873 WARN_ONCE(1, "invalid auth alg %d",
1874 ifmgd->auth_data->algorithm);
1875 return RX_MGMT_NONE;
1876 }
1877
bdcbd8e0 1878 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1879 ifmgd->auth_data->done = true;
1880 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1881 run_again(ifmgd, ifmgd->auth_data->timeout);
1882
1883 /* move station state to auth */
1884 mutex_lock(&sdata->local->sta_mtx);
1885 sta = sta_info_get(sdata, bssid);
1886 if (!sta) {
1887 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1888 goto out_err;
1889 }
1890 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1891 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1892 goto out_err;
1893 }
1894 mutex_unlock(&sdata->local->sta_mtx);
1895
1896 return RX_MGMT_CFG80211_RX_AUTH;
1897 out_err:
1898 mutex_unlock(&sdata->local->sta_mtx);
1899 /* ignore frame -- wait for timeout */
1900 return RX_MGMT_NONE;
1901}
1902
1903
77fdaa12
JB		 1904static enum rx_mgmt_action __must_check
1905ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1906 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1907{
46900298 1908 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1909 const u8 *bssid = NULL;
f0706e82
JB		 1910 u16 reason_code;
1911
66e67e41
JB		 1912 lockdep_assert_held(&ifmgd->mtx);
1913
f4ea83dd 1914 if (len < 24 + 2)
77fdaa12 1915 return RX_MGMT_NONE;
f0706e82 1916
66e67e41 1917 if (!ifmgd->associated ||
b203ca39 1918 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1919 return RX_MGMT_NONE;
77fdaa12 1920
0c1ad2ca 1921 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1922
1923 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1924
bdcbd8e0
JB		 1925 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1926 bssid, reason_code);
77fdaa12 1927
37ad3888
JB		 1928 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1929
7da7cc1d 1930 mutex_lock(&sdata->local->mtx);
63f170e0 1931 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1932 mutex_unlock(&sdata->local->mtx);
f0706e82 1933
77fdaa12 1934 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1935}
1936
1937
77fdaa12
JB		 1938static enum rx_mgmt_action __must_check
1939ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1940 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1941{
46900298 1942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1943 u16 reason_code;
1944
66e67e41 1945 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1946
66e67e41 1947 if (len < 24 + 2)
77fdaa12
JB		 1948 return RX_MGMT_NONE;
1949
66e67e41 1950 if (!ifmgd->associated ||
b203ca39 1951 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1952 return RX_MGMT_NONE;
f0706e82
JB		 1953
1954 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1955
bdcbd8e0
JB		 1956 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1957 mgmt->sa, reason_code);
f0706e82 1958
37ad3888
JB		 1959 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1960
7da7cc1d 1961 mutex_lock(&sdata->local->mtx);
bc83b681 1962 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1963 mutex_unlock(&sdata->local->mtx);
37ad3888 1964
77fdaa12 1965 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1966}
1967
c74d084f
CL		 1968static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1969 u8 *supp_rates, unsigned int supp_rates_len,
1970 u32 *rates, u32 *basic_rates,
1971 bool *have_higher_than_11mbit,
1972 int *min_rate, int *min_rate_index)
1973{
1974 int i, j;
1975
1976 for (i = 0; i < supp_rates_len; i++) {
1977 int rate = (supp_rates[i] & 0x7f) * 5;
1978 bool is_basic = !!(supp_rates[i] & 0x80);
1979
1980 if (rate > 110)
1981 *have_higher_than_11mbit = true;
1982
1983 /*
1984 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1985 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1986 *
1987 * Note: Even through the membership selector and the basic
1988 * rate flag share the same bit, they are not exactly
1989 * the same.
1990 */
1991 if (!!(supp_rates[i] & 0x80) &&
1992 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1993 continue;
1994
1995 for (j = 0; j < sband->n_bitrates; j++) {
1996 if (sband->bitrates[j].bitrate == rate) {
1997 *rates |= BIT(j);
1998 if (is_basic)
1999 *basic_rates |= BIT(j);
2000 if (rate < *min_rate) {
2001 *min_rate = rate;
2002 *min_rate_index = j;
2003 }
2004 break;
2005 }
2006 }
2007 }
2008}
f0706e82 2009
66e67e41
JB		 2010static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2011 bool assoc)
2012{
2013 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2014
2015 lockdep_assert_held(&sdata->u.mgd.mtx);
2016
66e67e41
JB		 2017 if (!assoc) {
2018 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2019
2020 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2021 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2022 }
2023
2024 kfree(assoc_data);
2025 sdata->u.mgd.assoc_data = NULL;
2026}
2027
2028static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2029 struct cfg80211_bss *cbss,
af6b6374 2030 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2031{
46900298 2032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2033 struct ieee80211_local *local = sdata->local;
8318d78a 2034 struct ieee80211_supported_band *sband;
f0706e82 2035 struct sta_info *sta;
af6b6374 2036 u8 *pos;
af6b6374 2037 u16 capab_info, aid;
f0706e82 2038 struct ieee802_11_elems elems;
bda3933a 2039 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2040 u32 changed = 0;
c74d084f 2041 int err;
f0706e82 2042
af6b6374 2043 /* AssocResp and ReassocResp have identical structure */
f0706e82 2044
f0706e82 2045 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2046 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2047
1dd84aa2 2048 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2049 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2050 aid);
1dd84aa2
JB		 2051 aid &= ~(BIT(15) | BIT(14));
2052
05cb9108
JB		 2053 ifmgd->broken_ap = false;
2054
2055 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2056 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2057 aid);
05cb9108
JB		 2058 aid = 0;
2059 ifmgd->broken_ap = true;
2060 }
2061
af6b6374
JB		 2062 pos = mgmt->u.assoc_resp.variable;
2063 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2064
f0706e82 2065 if (!elems.supp_rates) {
bdcbd8e0 2066 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2067 return false;
f0706e82
JB		 2068 }
2069
46900298 2070 ifmgd->aid = aid;
f0706e82 2071
2a33bee2
GE		 2072 mutex_lock(&sdata->local->sta_mtx);
2073 /*
2074 * station info was already allocated and inserted before
2075 * the association and should be available to us
2076 */
7852e361 2077 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2078 if (WARN_ON(!sta)) {
2079 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2080 return false;
77fdaa12 2081 }
05e5e883 2082
66e67e41 2083 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2084
ab1faead 2085 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2086 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2087 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2088
64f68e5d
JB		 2089 sta->supports_40mhz =
2090 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2091
4b7679a5 2092 rate_control_rate_init(sta);
f0706e82 2093
46900298 2094 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2095 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2096
ddf4ac53 2097 if (elems.wmm_param)
c2c98fde 2098 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2099
c8987876
JB		 2100 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2101 if (!err)
2102 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2103 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2104 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2105 if (err) {
bdcbd8e0
JB		 2106 sdata_info(sdata,
2107 "failed to move station %pM to desired state\n",
2108 sta->sta.addr);
c8987876
JB		 2109 WARN_ON(__sta_info_destroy(sta));
2110 mutex_unlock(&sdata->local->sta_mtx);
2111 return false;
2112 }
2113
7852e361 2114 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2115
f2176d72
JO		 2116 /*
2117 * Always handle WMM once after association regardless
2118 * of the first value the AP uses. Setting -1 here has
2119 * that effect because the AP values is an unsigned
2120 * 4-bit value.
2121 */
2122 ifmgd->wmm_last_param_set = -1;
2123
ddf4ac53 2124 if (elems.wmm_param)
4ced3f74 2125 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2126 elems.wmm_param_len);
aa837e1d 2127 else
3abead59
JB		 2128 ieee80211_set_wmm_default(sdata, false);
2129 changed |= BSS_CHANGED_QOS;
f0706e82 2130
074d46d1 2131 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2132 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2133 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2134 cbss->bssid, false);
ae5eb026 2135
60f8b39c
JB		 2136 /* set AID and assoc capability,
2137 * ieee80211_set_associated() will tell the driver */
2138 bss_conf->aid = aid;
2139 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2140 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2141
d524215f
FF		 2142 /*
2143 * If we're using 4-addr mode, let the AP know that we're
2144 * doing so, so that it can create the STA VLAN on its side
2145 */
2146 if (ifmgd->use_4addr)
2147 ieee80211_send_4addr_nullfunc(local, sdata);
2148
15b7b062 2149 /*
b291ba11
JB		 2150 * Start timer to probe the connection to the AP now.
2151 * Also start the timer that will detect beacon loss.
15b7b062 2152 */
b291ba11 2153 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2154 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2155
af6b6374 2156 return true;
f0706e82
JB		 2157}
2158
66e67e41
JB		 2159static enum rx_mgmt_action __must_check
2160ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2161 struct ieee80211_mgmt *mgmt, size_t len,
2162 struct cfg80211_bss **bss)
2163{
2164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2165 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2166 u16 capab_info, status_code, aid;
2167 struct ieee802_11_elems elems;
2168 u8 *pos;
2169 bool reassoc;
2170
2171 lockdep_assert_held(&ifmgd->mtx);
2172
2173 if (!assoc_data)
2174 return RX_MGMT_NONE;
b203ca39 2175 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2176 return RX_MGMT_NONE;
2177
2178 /*
2179 * AssocResp and ReassocResp have identical structure, so process both
2180 * of them in this function.
2181 */
2182
2183 if (len < 24 + 6)
2184 return RX_MGMT_NONE;
2185
2186 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2187 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2188 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2189 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2190
bdcbd8e0
JB		 2191 sdata_info(sdata,
2192 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2193 reassoc ? "Rea" : "A", mgmt->sa,
2194 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2195
2196 pos = mgmt->u.assoc_resp.variable;
2197 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2198
2199 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2200 elems.timeout_int && elems.timeout_int_len == 5 &&
2201 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2202 u32 tu, ms;
2203 tu = get_unaligned_le32(elems.timeout_int + 1);
2204 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2205 sdata_info(sdata,
2206 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2207 mgmt->sa, tu, ms);
66e67e41
JB		 2208 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2209 if (ms > IEEE80211_ASSOC_TIMEOUT)
2210 run_again(ifmgd, assoc_data->timeout);
2211 return RX_MGMT_NONE;
2212 }
2213
2214 *bss = assoc_data->bss;
2215
2216 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2217 sdata_info(sdata, "%pM denied association (code=%d)\n",
2218 mgmt->sa, status_code);
66e67e41
JB		 2219 ieee80211_destroy_assoc_data(sdata, false);
2220 } else {
66e67e41
JB		 2221 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2222 /* oops -- internal error -- send timeout for now */
10a9109f 2223 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2224 cfg80211_put_bss(*bss);
2225 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2226 }
635d999f 2227 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2228
2229 /*
2230 * destroy assoc_data afterwards, as otherwise an idle
2231 * recalc after assoc_data is NULL but before associated
2232 * is set can cause the interface to go idle
2233 */
2234 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2235 }
2236
2237 return RX_MGMT_CFG80211_RX_ASSOC;
2238}
98c8fccf
JB		 2239static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2240 struct ieee80211_mgmt *mgmt,
2241 size_t len,
2242 struct ieee80211_rx_status *rx_status,
2243 struct ieee802_11_elems *elems,
2244 bool beacon)
2245{
2246 struct ieee80211_local *local = sdata->local;
2247 int freq;
c2b13452 2248 struct ieee80211_bss *bss;
98c8fccf 2249 struct ieee80211_channel *channel;
56007a02
JB		 2250 bool need_ps = false;
2251
66e67e41 2252 if (sdata->u.mgd.associated &&
b203ca39 2253 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2254 bss = (void *)sdata->u.mgd.associated->priv;
2255 /* not previously set so we may need to recalc */
2256 need_ps = !bss->dtim_period;
2257 }
98c8fccf
JB		 2258
2259 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2260 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2261 rx_status->band);
98c8fccf
JB		 2262 else
2263 freq = rx_status->freq;
2264
2265 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2266
2267 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2268 return;
2269
98c8fccf 2270 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2271 channel, beacon);
77fdaa12
JB		 2272 if (bss)
2273 ieee80211_rx_bss_put(local, bss);
2274
2275 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2276 return;
2277
56007a02
JB		 2278 if (need_ps) {
2279 mutex_lock(&local->iflist_mtx);
2280 ieee80211_recalc_ps(local, -1);
2281 mutex_unlock(&local->iflist_mtx);
2282 }
2283
5bc1420b
JB		 2284 if (elems->ch_switch_ie &&
2285 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2286 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2287 bss, rx_status->mactime);
f0706e82
JB		 2288}
2289
2290
f698d856 2291static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2292 struct sk_buff *skb)
f0706e82 2293{
af6b6374 2294 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2295 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2296 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2297 size_t baselen, len = skb->len;
ae6a44e3
EK		 2298 struct ieee802_11_elems elems;
2299
15b7b062
KV		 2300 ifmgd = &sdata->u.mgd;
2301
77fdaa12
JB		 2302 ASSERT_MGD_MTX(ifmgd);
2303
b203ca39 2304 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2305 return; /* ignore ProbeResp to foreign address */
2306
ae6a44e3
EK		 2307 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2308 if (baselen > len)
2309 return;
2310
2311 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2312 &elems);
2313
98c8fccf 2314 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2315
77fdaa12 2316 if (ifmgd->associated &&
b203ca39 2317 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2318 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2319
2320 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2321 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2322 /* got probe response, continue with auth */
bdcbd8e0 2323 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2324 ifmgd->auth_data->tries = 0;
2325 ifmgd->auth_data->timeout = jiffies;
2326 run_again(ifmgd, ifmgd->auth_data->timeout);
2327 }
f0706e82
JB		 2328}
2329
d91f36db
JB		 2330/*
2331 * This is the canonical list of information elements we care about,
2332 * the filter code also gives us all changes to the Microsoft OUI
2333 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2334 *
2335 * We implement beacon filtering in software since that means we can
2336 * avoid processing the frame here and in cfg80211, and userspace
2337 * will not be able to tell whether the hardware supports it or not.
2338 *
2339 * XXX: This list needs to be dynamic -- userspace needs to be able to
2340 * add items it requires. It also needs to be able to tell us to
2341 * look out for other vendor IEs.
2342 */
2343static const u64 care_about_ies =
1d4df3a5
JB		 2344 (1ULL << WLAN_EID_COUNTRY) |
2345 (1ULL << WLAN_EID_ERP_INFO) |
2346 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2347 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2348 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2349 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2350
f698d856 2351static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2352 struct ieee80211_mgmt *mgmt,
2353 size_t len,
2354 struct ieee80211_rx_status *rx_status)
2355{
d91f36db 2356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2357 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2358 size_t baselen;
2359 struct ieee802_11_elems elems;
f698d856 2360 struct ieee80211_local *local = sdata->local;
471b3efd 2361 u32 changed = 0;
d91f36db 2362 bool erp_valid, directed_tim = false;
7a5158ef 2363 u8 erp_value = 0;
d91f36db 2364 u32 ncrc;
77fdaa12
JB		 2365 u8 *bssid;
2366
66e67e41 2367 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2368
ae6a44e3
EK		 2369 /* Process beacon from the current BSS */
2370 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2371 if (baselen > len)
2372 return;
2373
568d6e28 2374 if (rx_status->freq != local->oper_channel->center_freq)
f0706e82 2375 return;
f0706e82 2376
66e67e41 2377 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2378 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2379 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2380 len - baselen, &elems);
77fdaa12 2381
66e67e41
JB		 2382 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2383 false);
2384 ifmgd->assoc_data->have_beacon = true;
2385 ifmgd->assoc_data->sent_assoc = false;
2386 /* continue assoc process */
2387 ifmgd->assoc_data->timeout = jiffies;
2388 run_again(ifmgd, ifmgd->assoc_data->timeout);
2389 return;
2390 }
77fdaa12 2391
66e67e41 2392 if (!ifmgd->associated ||
b203ca39 2393 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2394 return;
66e67e41 2395 bssid = ifmgd->associated->bssid;
f0706e82 2396
17e4ec14
JM		 2397 /* Track average RSSI from the Beacon frames of the current AP */
2398 ifmgd->last_beacon_signal = rx_status->signal;
2399 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2400 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2401 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2402 ifmgd->last_cqm_event_signal = 0;
391a200a 2403 ifmgd->count_beacon_signal = 1;
615f7b9b 2404 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2405 } else {
2406 ifmgd->ave_beacon_signal =
2407 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2408 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2409 ifmgd->ave_beacon_signal) / 16;
391a200a 2410 ifmgd->count_beacon_signal++;
17e4ec14 2411 }
615f7b9b
MV		 2412
2413 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2414 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2415 int sig = ifmgd->ave_beacon_signal;
2416 int last_sig = ifmgd->last_ave_beacon_signal;
2417
2418 /*
2419 * if signal crosses either of the boundaries, invoke callback
2420 * with appropriate parameters
2421 */
2422 if (sig > ifmgd->rssi_max_thold &&
2423 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2424 ifmgd->last_ave_beacon_signal = sig;
2425 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2426 } else if (sig < ifmgd->rssi_min_thold &&
2427 (last_sig >= ifmgd->rssi_max_thold ||
2428 last_sig == 0)) {
2429 ifmgd->last_ave_beacon_signal = sig;
2430 drv_rssi_callback(local, RSSI_EVENT_LOW);
2431 }
2432 }
2433
17e4ec14 2434 if (bss_conf->cqm_rssi_thold &&
391a200a 2435 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2436 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2437 int sig = ifmgd->ave_beacon_signal / 16;
2438 int last_event = ifmgd->last_cqm_event_signal;
2439 int thold = bss_conf->cqm_rssi_thold;
2440 int hyst = bss_conf->cqm_rssi_hyst;
2441 if (sig < thold &&
2442 (last_event == 0 || sig < last_event - hyst)) {
2443 ifmgd->last_cqm_event_signal = sig;
2444 ieee80211_cqm_rssi_notify(
2445 &sdata->vif,
2446 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2447 GFP_KERNEL);
2448 } else if (sig > thold &&
2449 (last_event == 0 || sig > last_event + hyst)) {
2450 ifmgd->last_cqm_event_signal = sig;
2451 ieee80211_cqm_rssi_notify(
2452 &sdata->vif,
2453 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2454 GFP_KERNEL);
2455 }
2456 }
2457
b291ba11 2458 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2459 mlme_dbg_ratelimited(sdata,
2460 "cancelling probereq poll due to a received beacon\n");
925e64c3 2461 mutex_lock(&local->mtx);
b291ba11 2462 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2463 ieee80211_run_deferred_scan(local);
2464 mutex_unlock(&local->mtx);
2465
4e751843
JB		 2466 mutex_lock(&local->iflist_mtx);
2467 ieee80211_recalc_ps(local, -1);
2468 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2469 }
2470
b291ba11
JB		 2471 /*
2472 * Push the beacon loss detection into the future since
2473 * we are processing a beacon from the AP just now.
2474 */
d3a910a8 2475 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2476
d91f36db
JB		 2477 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2478 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2479 len - baselen, &elems,
2480 care_about_ies, ncrc);
2481
2482 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2483 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2484 ifmgd->aid);
d91f36db 2485
25c9c875 2486 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2487 if (directed_tim) {
572e0012 2488 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2489 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2490 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2491 ieee80211_hw_config(local,
2492 IEEE80211_CONF_CHANGE_PS);
2493 }
572e0012 2494 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2495 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2496 local->pspolling = true;
2497
2498 /*
2499 * Here is assumed that the driver will be
2500 * able to send ps-poll frame and receive a
2501 * response even though power save mode is
2502 * enabled, but some drivers might require
2503 * to disable power save here. This needs
2504 * to be investigated.
2505 */
2506 ieee80211_send_pspoll(local, sdata);
2507 }
a97b77b9
VN		 2508 }
2509 }
7a5158ef 2510
d8ec4433 2511 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2512 return;
2513 ifmgd->beacon_crc = ncrc;
d8ec4433 2514 ifmgd->beacon_crc_valid = true;
30196673 2515
7d25745d
JB		 2516 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2517 true);
2518
2519 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2520 elems.wmm_param_len))
2521 changed |= BSS_CHANGED_QOS;
2522
7a5158ef
JB		 2523 if (elems.erp_info && elems.erp_info_len >= 1) {
2524 erp_valid = true;
2525 erp_value = elems.erp_info[0];
2526 } else {
2527 erp_valid = false;
50c4afb9 2528 }
7a5158ef
JB		 2529 changed |= ieee80211_handle_bss_capability(sdata,
2530 le16_to_cpu(mgmt->u.beacon.capab_info),
2531 erp_valid, erp_value);
f0706e82 2532
d3c990fb 2533
074d46d1 2534 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2535 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2536 struct ieee80211_supported_band *sband;
ae5eb026 2537
568d6e28 2538 sband = local->hw.wiphy->bands[local->oper_channel->band];
ae5eb026 2539
24398e39
JB		 2540 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2541 bssid, true);
d3c990fb
RR		 2542 }
2543
8b19e6ca 2544 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2545 if (elems.country_elem) {
a8302de9
VT		 2546 /* TODO: IBSS also needs this */
2547 if (elems.pwr_constr_elem)
2548 ieee80211_handle_pwr_constr(sdata,
2549 le16_to_cpu(mgmt->u.probe_resp.capab_info),
761a48d2 2550 elems.pwr_constr_elem);
3f2355cb
LR		 2551 }
2552
471b3efd 2553 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2554}
2555
1fa57d01
JB		 2556void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2557 struct sk_buff *skb)
f0706e82 2558{
77fdaa12 2559 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2560 struct ieee80211_rx_status *rx_status;
f0706e82 2561 struct ieee80211_mgmt *mgmt;
66e67e41 2562 struct cfg80211_bss *bss = NULL;
77fdaa12 2563 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2564 u16 fc;
2565
f0706e82
JB		 2566 rx_status = (struct ieee80211_rx_status *) skb->cb;
2567 mgmt = (struct ieee80211_mgmt *) skb->data;
2568 fc = le16_to_cpu(mgmt->frame_control);
2569
77fdaa12
JB		 2570 mutex_lock(&ifmgd->mtx);
2571
66e67e41
JB		 2572 switch (fc & IEEE80211_FCTL_STYPE) {
2573 case IEEE80211_STYPE_BEACON:
2574 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2575 break;
2576 case IEEE80211_STYPE_PROBE_RESP:
2577 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2578 break;
2579 case IEEE80211_STYPE_AUTH:
2580 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2581 break;
2582 case IEEE80211_STYPE_DEAUTH:
2583 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2584 break;
2585 case IEEE80211_STYPE_DISASSOC:
2586 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2587 break;
2588 case IEEE80211_STYPE_ASSOC_RESP:
2589 case IEEE80211_STYPE_REASSOC_RESP:
2590 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2591 break;
2592 case IEEE80211_STYPE_ACTION:
2593 switch (mgmt->u.action.category) {
2594 case WLAN_CATEGORY_SPECTRUM_MGMT:
2595 ieee80211_sta_process_chanswitch(sdata,
2596 &mgmt->u.action.u.chan_switch.sw_elem,
2597 (void *)ifmgd->associated->priv,
2598 rx_status->mactime);
77fdaa12 2599 break;
77fdaa12 2600 }
77fdaa12 2601 }
77fdaa12
JB		 2602 mutex_unlock(&ifmgd->mtx);
2603
66e67e41
JB		 2604 switch (rma) {
2605 case RX_MGMT_NONE:
2606 /* no action */
2607 break;
2608 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2609 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2610 break;
2611 case RX_MGMT_CFG80211_DISASSOC:
2612 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2613 break;
2614 case RX_MGMT_CFG80211_RX_AUTH:
2615 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2616 break;
2617 case RX_MGMT_CFG80211_RX_ASSOC:
2618 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2619 break;
2620 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2621 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2622 break;
2623 default:
2624 WARN(1, "unexpected: %d", rma);
b054b747 2625 }
f0706e82
JB		 2626}
2627
9c6bd790 2628static void ieee80211_sta_timer(unsigned long data)
f0706e82 2629{
60f8b39c
JB		 2630 struct ieee80211_sub_if_data *sdata =
2631 (struct ieee80211_sub_if_data *) data;
46900298 2632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2633 struct ieee80211_local *local = sdata->local;
f0706e82 2634
5bb644a0
JB		 2635 if (local->quiescing) {
2636 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2637 return;
2638 }
2639
64592c8f 2640 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2641}
2642
04ac3c0e 2643static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2644 u8 *bssid, u8 reason)
04ac3c0e
FF		 2645{
2646 struct ieee80211_local *local = sdata->local;
2647 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2648 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2649
37ad3888
JB		 2650 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2651 false, frame_buf);
04ac3c0e 2652 mutex_unlock(&ifmgd->mtx);
37ad3888 2653
04ac3c0e
FF		 2654 /*
2655 * must be outside lock due to cfg80211,
2656 * but that's not a problem.
2657 */
5fef7dbc 2658 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2659
2660 mutex_lock(&local->mtx);
2661 ieee80211_recalc_idle(local);
2662 mutex_unlock(&local->mtx);
2663
04ac3c0e
FF		 2664 mutex_lock(&ifmgd->mtx);
2665}
2666
66e67e41
JB		 2667static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2668{
2669 struct ieee80211_local *local = sdata->local;
2670 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2671 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2672
2673 lockdep_assert_held(&ifmgd->mtx);
2674
2675 if (WARN_ON_ONCE(!auth_data))
2676 return -EINVAL;
2677
66e67e41
JB		 2678 auth_data->tries++;
2679
2680 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2681 sdata_info(sdata, "authentication with %pM timed out\n",
2682 auth_data->bss->bssid);
66e67e41
JB		 2683
2684 /*
2685 * Most likely AP is not in the range so remove the
2686 * bss struct for that AP.
2687 */
2688 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2689
2690 return -ETIMEDOUT;
2691 }
2692
a1845fc7
JB		 2693 drv_mgd_prepare_tx(local, sdata);
2694
66e67e41 2695 if (auth_data->bss->proberesp_ies) {
bdcbd8e0
JB		 2696 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2697 auth_data->bss->bssid, auth_data->tries,
2698 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2699
2700 auth_data->expected_transaction = 2;
2701 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2702 auth_data->ie, auth_data->ie_len,
2703 auth_data->bss->bssid,
2704 auth_data->bss->bssid, NULL, 0, 0);
2705 } else {
2706 const u8 *ssidie;
2707
bdcbd8e0
JB		 2708 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2709 auth_data->bss->bssid, auth_data->tries,
2710 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2711
2712 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2713 if (!ssidie)
2714 return -EINVAL;
2715 /*
2716 * Direct probe is sent to broadcast address as some APs
2717 * will not answer to direct packet in unassociated state.
2718 */
2719 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
fe94fe05
JB		 2720 NULL, 0, (u32) -1, true, false,
2721 auth_data->bss->channel);
66e67e41
JB		 2722 }
2723
2724 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2725 run_again(ifmgd, auth_data->timeout);
2726
2727 return 0;
2728}
2729
2730static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2731{
2732 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2733 struct ieee80211_local *local = sdata->local;
2734
2735 lockdep_assert_held(&sdata->u.mgd.mtx);
2736
66e67e41
JB		 2737 assoc_data->tries++;
2738 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2739 sdata_info(sdata, "association with %pM timed out\n",
2740 assoc_data->bss->bssid);
66e67e41
JB		 2741
2742 /*
2743 * Most likely AP is not in the range so remove the
2744 * bss struct for that AP.
2745 */
2746 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2747
2748 return -ETIMEDOUT;
2749 }
2750
bdcbd8e0
JB		 2751 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2752 assoc_data->bss->bssid, assoc_data->tries,
2753 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2754 ieee80211_send_assoc(sdata);
2755
2756 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2757 run_again(&sdata->u.mgd, assoc_data->timeout);
2758
2759 return 0;
2760}
2761
1fa57d01 2762void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2763{
9c6bd790 2764 struct ieee80211_local *local = sdata->local;
1fa57d01 2765 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2766
77fdaa12
JB		 2767 mutex_lock(&ifmgd->mtx);
2768
66e67e41
JB		 2769 if (ifmgd->auth_data &&
2770 time_after(jiffies, ifmgd->auth_data->timeout)) {
2771 if (ifmgd->auth_data->done) {
2772 /*
2773 * ok ... we waited for assoc but userspace didn't,
2774 * so let's just kill the auth data
2775 */
2776 ieee80211_destroy_auth_data(sdata, false);
2777 } else if (ieee80211_probe_auth(sdata)) {
2778 u8 bssid[ETH_ALEN];
2779
2780 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2781
2782 ieee80211_destroy_auth_data(sdata, false);
2783
2784 mutex_unlock(&ifmgd->mtx);
2785 cfg80211_send_auth_timeout(sdata->dev, bssid);
2786 mutex_lock(&ifmgd->mtx);
2787 }
2788 } else if (ifmgd->auth_data)
2789 run_again(ifmgd, ifmgd->auth_data->timeout);
2790
2791 if (ifmgd->assoc_data &&
2792 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2793 if (!ifmgd->assoc_data->have_beacon ||
2794 ieee80211_do_assoc(sdata)) {
2795 u8 bssid[ETH_ALEN];
2796
2797 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2798
2799 ieee80211_destroy_assoc_data(sdata, false);
2800
2801 mutex_unlock(&ifmgd->mtx);
2802 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2803 mutex_lock(&ifmgd->mtx);
2804 }
2805 } else if (ifmgd->assoc_data)
2806 run_again(ifmgd, ifmgd->assoc_data->timeout);
2807
b291ba11
JB		 2808 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2809 IEEE80211_STA_CONNECTION_POLL) &&
2810 ifmgd->associated) {
a43abf29 2811 u8 bssid[ETH_ALEN];
72a8a3ed 2812 int max_tries;
a43abf29 2813
0c1ad2ca 2814 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2815
72a8a3ed 2816 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2817 max_tries = max_nullfunc_tries;
72a8a3ed 2818 else
180205bd 2819 max_tries = max_probe_tries;
72a8a3ed 2820
4e5ff376
FF		 2821 /* ACK received for nullfunc probing frame */
2822 if (!ifmgd->probe_send_count)
2823 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2824 else if (ifmgd->nullfunc_failed) {
2825 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2826 mlme_dbg(sdata,
2827 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2828 bssid, ifmgd->probe_send_count,
2829 max_tries);
04ac3c0e
FF		 2830 ieee80211_mgd_probe_ap_send(sdata);
2831 } else {
bdcbd8e0
JB		 2832 mlme_dbg(sdata,
2833 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2834 bssid);
95acac61
JB		 2835 ieee80211_sta_connection_lost(sdata, bssid,
2836 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2837 }
2838 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2839 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2840 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2841 mlme_dbg(sdata,
2842 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2843 bssid, probe_wait_ms);
95acac61
JB		 2844 ieee80211_sta_connection_lost(sdata, bssid,
2845 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2846 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2847 mlme_dbg(sdata,
2848 "No probe response from AP %pM after %dms, try %d/%i\n",
2849 bssid, probe_wait_ms,
2850 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2851 ieee80211_mgd_probe_ap_send(sdata);
2852 } else {
b291ba11
JB		 2853 /*
2854 * We actually lost the connection ... or did we?
2855 * Let's make sure!
2856 */
b38afa87
BG		 2857 wiphy_debug(local->hw.wiphy,
2858 "%s: No probe response from AP %pM"
2859 " after %dms, disconnecting.\n",
2860 sdata->name,
180205bd 2861 bssid, probe_wait_ms);
04ac3c0e 2862
95acac61
JB		 2863 ieee80211_sta_connection_lost(sdata, bssid,
2864 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2865 }
2866 }
2867
77fdaa12 2868 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2869
2870 mutex_lock(&local->mtx);
2871 ieee80211_recalc_idle(local);
2872 mutex_unlock(&local->mtx);
f0706e82
JB		 2873}
2874
b291ba11
JB		 2875static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2876{
2877 struct ieee80211_sub_if_data *sdata =
2878 (struct ieee80211_sub_if_data *) data;
2879 struct ieee80211_local *local = sdata->local;
2880
2881 if (local->quiescing)
2882 return;
2883
1e4dcd01
JO		 2884 ieee80211_queue_work(&sdata->local->hw,
2885 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2886}
2887
2888static void ieee80211_sta_conn_mon_timer(unsigned long data)
2889{
2890 struct ieee80211_sub_if_data *sdata =
2891 (struct ieee80211_sub_if_data *) data;
2892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2893 struct ieee80211_local *local = sdata->local;
2894
2895 if (local->quiescing)
2896 return;
2897
42935eca 2898 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2899}
2900
2901static void ieee80211_sta_monitor_work(struct work_struct *work)
2902{
2903 struct ieee80211_sub_if_data *sdata =
2904 container_of(work, struct ieee80211_sub_if_data,
2905 u.mgd.monitor_work);
2906
2907 ieee80211_mgd_probe_ap(sdata, false);
2908}
2909
9c6bd790
JB		 2910static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2911{
494f1fe5
EP		 2912 u32 flags;
2913
ad935687 2914 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2915 __ieee80211_stop_poll(sdata);
ad935687 2916
b291ba11 2917 /* let's probe the connection once */
494f1fe5
EP		 2918 flags = sdata->local->hw.flags;
2919 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2920 ieee80211_queue_work(&sdata->local->hw,
2921 &sdata->u.mgd.monitor_work);
b291ba11 2922 /* and do all the other regular work too */
64592c8f 2923 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2924 }
9c6bd790 2925}
f0706e82 2926
5bb644a0
JB		 2927#ifdef CONFIG_PM
2928void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2929{
2930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2931
2932 /*
2933 * we need to use atomic bitops for the running bits
2934 * only because both timers might fire at the same
2935 * time -- the code here is properly synchronised.
2936 */
2937
d1f5b7a3
JB		 2938 cancel_work_sync(&ifmgd->request_smps_work);
2939
0ecfe806 2940 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2941 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 2942 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 2943 if (del_timer_sync(&ifmgd->timer))
2944 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2945
2946 cancel_work_sync(&ifmgd->chswitch_work);
2947 if (del_timer_sync(&ifmgd->chswitch_timer))
2948 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2949
b291ba11
JB		 2950 /* these will just be re-established on connection */
2951 del_timer_sync(&ifmgd->conn_mon_timer);
2952 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2953}
2954
2955void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2956{
2957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2958
676b58c2
RM		 2959 if (!ifmgd->associated)
2960 return;
2961
95acac61
JB		 2962 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2963 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2964 mutex_lock(&ifmgd->mtx);
2965 if (ifmgd->associated) {
bdcbd8e0
JB		 2966 mlme_dbg(sdata,
2967 "driver requested disconnect after resume\n");
95acac61
JB		 2968 ieee80211_sta_connection_lost(sdata,
2969 ifmgd->associated->bssid,
2970 WLAN_REASON_UNSPECIFIED);
2971 mutex_unlock(&ifmgd->mtx);
2972 return;
2973 }
2974 mutex_unlock(&ifmgd->mtx);
2975 }
2976
5bb644a0
JB		 2977 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2978 add_timer(&ifmgd->timer);
2979 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2980 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2981 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2982
2983 mutex_lock(&sdata->local->mtx);
46090979 2984 ieee80211_restart_sta_timer(sdata);
925e64c3 2985 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2986}
2987#endif
2988
9c6bd790
JB		 2989/* interface setup */
2990void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2991{
46900298 2992 struct ieee80211_if_managed *ifmgd;
988c0f72 2993
46900298 2994 ifmgd = &sdata->u.mgd;
b291ba11 2995 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2996 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2997 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2998 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 2999 INIT_WORK(&ifmgd->csa_connection_drop_work,
3000 ieee80211_csa_connection_drop_work);
d1f5b7a3 3001 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3002 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3003 (unsigned long) sdata);
b291ba11
JB		 3004 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3005 (unsigned long) sdata);
3006 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3007 (unsigned long) sdata);
46900298 3008 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3009 (unsigned long) sdata);
9c6bd790 3010
ab1faead 3011 ifmgd->flags = 0;
1478acb3 3012 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3013 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3014 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3015
77fdaa12 3016 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3017
3018 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3019 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3020 else
3021 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3022}
3023
77fdaa12
JB		 3024/* scan finished notification */
3025void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3026{
31ee67a1 3027 struct ieee80211_sub_if_data *sdata;
60f8b39c 3028
77fdaa12
JB		 3029 /* Restart STA timers */
3030 rcu_read_lock();
3031 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3032 ieee80211_restart_sta_timer(sdata);
3033 rcu_read_unlock();
3034}
60f8b39c 3035
77fdaa12
JB		 3036int ieee80211_max_network_latency(struct notifier_block *nb,
3037 unsigned long data, void *dummy)
3038{
3039 s32 latency_usec = (s32) data;
3040 struct ieee80211_local *local =
3041 container_of(nb, struct ieee80211_local,
3042 network_latency_notifier);
1fa6f4af 3043
77fdaa12
JB		 3044 mutex_lock(&local->iflist_mtx);
3045 ieee80211_recalc_ps(local, latency_usec);
3046 mutex_unlock(&local->iflist_mtx);
dfe67012 3047
77fdaa12 3048 return 0;
9c6bd790
JB		 3049}
3050
b17166a7
JB		 3051static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3052 struct cfg80211_bss *cbss)
a1cf775d
JB		 3053{
3054 struct ieee80211_local *local = sdata->local;
3055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39
JB		 3056 int ht_cfreq;
3057 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3058 const u8 *ht_oper_ie;
3059 const struct ieee80211_ht_operation *ht_oper = NULL;
3060 struct ieee80211_supported_band *sband;
a1cf775d 3061
24398e39
JB		 3062 sband = local->hw.wiphy->bands[cbss->channel->band];
3063
3064 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3065
3066 if (sband->ht_cap.ht_supported) {
3067 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3068 cbss->information_elements,
3069 cbss->len_information_elements);
3070 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3071 ht_oper = (void *)(ht_oper_ie + 2);
3072 }
3073
3074 if (ht_oper) {
3075 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3076 cbss->channel->band);
3077 /* check that channel matches the right operating channel */
3078 if (cbss->channel->center_freq != ht_cfreq) {
3079 /*
3080 * It's possible that some APs are confused here;
3081 * Netgear WNDR3700 sometimes reports 4 higher than
3082 * the actual channel in association responses, but
3083 * since we look at probe response/beacon data here
3084 * it should be OK.
3085 */
bdcbd8e0
JB		 3086 sdata_info(sdata,
3087 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3088 cbss->channel->center_freq,
3089 ht_cfreq, ht_oper->primary_chan,
3090 cbss->channel->band);
24398e39
JB		 3091 ht_oper = NULL;
3092 }
3093 }
3094
3095 if (ht_oper) {
3096 channel_type = NL80211_CHAN_HT20;
3097
3098 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3099 switch (ht_oper->ht_param &
3100 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3101 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3102 channel_type = NL80211_CHAN_HT40PLUS;
3103 break;
3104 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3105 channel_type = NL80211_CHAN_HT40MINUS;
3106 break;
3107 }
3108 }
3109 }
3110
3111 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3112 /* can only fail due to HT40+/- mismatch */
3113 channel_type = NL80211_CHAN_HT20;
bdcbd8e0
JB		 3114 sdata_info(sdata,
3115 "disabling 40 MHz due to multi-vif mismatch\n");
24398e39
JB		 3116 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3117 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3118 channel_type));
3119 }
3120
5d6a1b06 3121 local->oper_channel = cbss->channel;
6aee4ca3 3122 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
a1cf775d 3123
b17166a7
JB		 3124 return 0;
3125}
3126
3127static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3128 struct cfg80211_bss *cbss, bool assoc)
3129{
3130 struct ieee80211_local *local = sdata->local;
3131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3132 struct ieee80211_bss *bss = (void *)cbss->priv;
3133 struct sta_info *new_sta = NULL;
3134 bool have_sta = false;
3135 int err;
3136
3137 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3138 return -EINVAL;
3139
3140 if (assoc) {
3141 rcu_read_lock();
3142 have_sta = sta_info_get(sdata, cbss->bssid);
3143 rcu_read_unlock();
3144 }
3145
3146 if (!have_sta) {
3147 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3148 if (!new_sta)
3149 return -ENOMEM;
3150 }
3151
3152 mutex_lock(&local->mtx);
3153 ieee80211_recalc_idle(sdata->local);
3154 mutex_unlock(&local->mtx);
3155
13e0c8e3 3156 if (new_sta) {
5d6a1b06
JB		 3157 u32 rates = 0, basic_rates = 0;
3158 bool have_higher_than_11mbit;
3159 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3160 struct ieee80211_supported_band *sband;
3161
3162 sband = local->hw.wiphy->bands[cbss->channel->band];
3163
3164 err = ieee80211_prep_channel(sdata, cbss);
3165 if (err) {
3166 sta_info_free(local, new_sta);
3167 return err;
3168 }
5d6a1b06 3169
5d6a1b06
JB		 3170 ieee80211_get_rates(sband, bss->supp_rates,
3171 bss->supp_rates_len,
3172 &rates, &basic_rates,
3173 &have_higher_than_11mbit,
3174 &min_rate, &min_rate_index);
3175
3176 /*
3177 * This used to be a workaround for basic rates missing
3178 * in the association response frame. Now that we no
3179 * longer use the basic rates from there, it probably
3180 * doesn't happen any more, but keep the workaround so
3181 * in case some *other* APs are buggy in different ways
3182 * we can connect -- with a warning.
3183 */
3184 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3185 sdata_info(sdata,
3186 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3187 basic_rates = BIT(min_rate_index);
3188 }
3189
13e0c8e3 3190 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3191 sdata->vif.bss_conf.basic_rates = basic_rates;
3192
3193 /* cf. IEEE 802.11 9.2.12 */
3194 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3195 have_higher_than_11mbit)
3196 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3197 else
3198 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3199
3200 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3201
8c358bcd
JB		 3202 /* set timing information */
3203 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3204 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3205 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3206
3207 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3208 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3209 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3210 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3211
3212 if (assoc)
13e0c8e3 3213 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3214
13e0c8e3
JB		 3215 err = sta_info_insert(new_sta);
3216 new_sta = NULL;
a1cf775d 3217 if (err) {
bdcbd8e0
JB		 3218 sdata_info(sdata,
3219 "failed to insert STA entry for the AP (error %d)\n",
3220 err);
a1cf775d
JB		 3221 return err;
3222 }
3223 } else
b203ca39 3224 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3225
3226 return 0;
3227}
3228
77fdaa12
JB		 3229/* config hooks */
3230int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3231 struct cfg80211_auth_request *req)
9c6bd790 3232{
66e67e41
JB		 3233 struct ieee80211_local *local = sdata->local;
3234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3235 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3236 u16 auth_alg;
66e67e41
JB		 3237 int err;
3238
3239 /* prepare auth data structure */
9c6bd790 3240
77fdaa12
JB		 3241 switch (req->auth_type) {
3242 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3243 auth_alg = WLAN_AUTH_OPEN;
3244 break;
3245 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3246 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3247 return -EOPNOTSUPP;
77fdaa12
JB		 3248 auth_alg = WLAN_AUTH_SHARED_KEY;
3249 break;
3250 case NL80211_AUTHTYPE_FT:
3251 auth_alg = WLAN_AUTH_FT;
3252 break;
3253 case NL80211_AUTHTYPE_NETWORK_EAP:
3254 auth_alg = WLAN_AUTH_LEAP;
3255 break;
3256 default:
3257 return -EOPNOTSUPP;
60f8b39c 3258 }
77fdaa12 3259
66e67e41
JB		 3260 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3261 if (!auth_data)
9c6bd790 3262 return -ENOMEM;
77fdaa12 3263
66e67e41 3264 auth_data->bss = req->bss;
77fdaa12
JB		 3265
3266 if (req->ie && req->ie_len) {
66e67e41
JB		 3267 memcpy(auth_data->ie, req->ie, req->ie_len);
3268 auth_data->ie_len = req->ie_len;
9c6bd790 3269 }
77fdaa12 3270
fffd0934 3271 if (req->key && req->key_len) {
66e67e41
JB		 3272 auth_data->key_len = req->key_len;
3273 auth_data->key_idx = req->key_idx;
3274 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3275 }
3276
66e67e41 3277 auth_data->algorithm = auth_alg;
60f8b39c 3278
66e67e41 3279 /* try to authenticate/probe */
2a33bee2 3280
66e67e41 3281 mutex_lock(&ifmgd->mtx);
2a33bee2 3282
66e67e41
JB		 3283 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3284 ifmgd->assoc_data) {
3285 err = -EBUSY;
3286 goto err_free;
2a33bee2
GE		 3287 }
3288
66e67e41
JB		 3289 if (ifmgd->auth_data)
3290 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3291
66e67e41
JB		 3292 /* prep auth_data so we don't go into idle on disassoc */
3293 ifmgd->auth_data = auth_data;
af6b6374 3294
66e67e41 3295 if (ifmgd->associated)
37ad3888 3296 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3297
bdcbd8e0 3298 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3299
a1cf775d
JB		 3300 err = ieee80211_prep_connection(sdata, req->bss, false);
3301 if (err)
66e67e41 3302 goto err_clear;
af6b6374 3303
66e67e41
JB		 3304 err = ieee80211_probe_auth(sdata);
3305 if (err) {
66e67e41
JB		 3306 sta_info_destroy_addr(sdata, req->bss->bssid);
3307 goto err_clear;
3308 }
3309
3310 /* hold our own reference */
3311 cfg80211_ref_bss(auth_data->bss);
3312 err = 0;
3313 goto out_unlock;
3314
3315 err_clear:
3d2abdfd
EP		 3316 memset(ifmgd->bssid, 0, ETH_ALEN);
3317 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3318 ifmgd->auth_data = NULL;
3319 err_free:
3320 kfree(auth_data);
3321 out_unlock:
3322 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3323
66e67e41 3324 return err;
af6b6374
JB		 3325}
3326
77fdaa12
JB		 3327int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3328 struct cfg80211_assoc_request *req)
f0706e82 3329{
66e67e41 3330 struct ieee80211_local *local = sdata->local;
77fdaa12 3331 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3332 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3333 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3334 struct ieee80211_supported_band *sband;
9dde6423 3335 const u8 *ssidie, *ht_ie;
2a33bee2 3336 int i, err;
f0706e82 3337
66e67e41
JB		 3338 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3339 if (!ssidie)
3340 return -EINVAL;
3341
3342 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3343 if (!assoc_data)
3344 return -ENOMEM;
3345
77fdaa12 3346 mutex_lock(&ifmgd->mtx);
9c87ba67 3347
66e67e41 3348 if (ifmgd->associated)
37ad3888 3349 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3350
3351 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3352 err = -EBUSY;
3353 goto err_free;
af6b6374 3354 }
77fdaa12 3355
66e67e41
JB		 3356 if (ifmgd->assoc_data) {
3357 err = -EBUSY;
3358 goto err_free;
3359 }
77fdaa12 3360
66e67e41
JB		 3361 if (ifmgd->auth_data) {
3362 bool match;
3363
3364 /* keep sta info, bssid if matching */
b203ca39 3365 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3366 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3367 }
3368
66e67e41 3369 /* prepare assoc data */
19c3b830
JB		 3370
3371 /*
3372 * keep only the 40 MHz disable bit set as it might have
3373 * been set during authentication already, all other bits
3374 * should be reset for a new connection
3375 */
3376 ifmgd->flags &= IEEE80211_STA_DISABLE_40MHZ;
77fdaa12 3377
d8ec4433
JO		 3378 ifmgd->beacon_crc_valid = false;
3379
de5036aa
JB		 3380 /*
3381 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3382 * We still associate in non-HT mode (11a/b/g) if any one of these
3383 * ciphers is configured as pairwise.
3384 * We can set this to true for non-11n hardware, that'll be checked
3385 * separately along with the peer capabilities.
3386 */
1c4cb928 3387 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3388 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3389 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3390 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3391 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba 3392 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3393 netdev_info(sdata->dev,
d545daba 3394 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3395 }
3396 }
77fdaa12 3397
d545daba 3398 if (req->flags & ASSOC_REQ_DISABLE_HT) {
ef96a842 3399 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
d545daba
MP		 3400 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3401 }
ef96a842 3402
4e74bfdb
JB		 3403 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3404 sband = local->hw.wiphy->bands[req->bss->channel->band];
3405 if (!sband->ht_cap.ht_supported ||
1c4cb928 3406 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3407 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1b49de26
JB		 3408 if (!bss->wmm_used)
3409 netdev_info(sdata->dev,
3410 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3411 }
4e74bfdb 3412
d545daba
MP		 3413 /* disable VHT if we don't support it or the AP doesn't use WMM */
3414 if (!sband->vht_cap.vht_supported ||
3415 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3416 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3417 if (!bss->wmm_used)
3418 netdev_info(sdata->dev,
3419 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3420 }
3421
ef96a842
BG		 3422 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3423 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3424 sizeof(ifmgd->ht_capa_mask));
3425
77fdaa12 3426 if (req->ie && req->ie_len) {
66e67e41
JB		 3427 memcpy(assoc_data->ie, req->ie, req->ie_len);
3428 assoc_data->ie_len = req->ie_len;
3429 }
f679f65d 3430
66e67e41 3431 assoc_data->bss = req->bss;
f679f65d 3432
af6b6374
JB		 3433 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3434 if (ifmgd->powersave)
3435 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3436 else
3437 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3438 } else
3439 ifmgd->ap_smps = ifmgd->req_smps;
3440
66e67e41 3441 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3442 assoc_data->wmm = bss->wmm_used &&
3443 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3444 assoc_data->supp_rates = bss->supp_rates;
3445 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3446
3447 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3448 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3449 assoc_data->ap_ht_param =
3450 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3451 else
3452 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3453
ab13315a
KV		 3454 if (bss->wmm_used && bss->uapsd_supported &&
3455 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3456 assoc_data->uapsd = true;
ab13315a
KV		 3457 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3458 } else {
76f0303d 3459 assoc_data->uapsd = false;
ab13315a
KV		 3460 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3461 }
3462
66e67e41
JB		 3463 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3464 assoc_data->ssid_len = ssidie[1];
63f170e0 3465
77fdaa12 3466 if (req->prev_bssid)
66e67e41 3467 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3468
3469 if (req->use_mfp) {
3470 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3471 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3472 } else {
3473 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3474 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3475 }
3476
3477 if (req->crypto.control_port)
3478 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3479 else
3480 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3481
a621fa4d
JB		 3482 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3483 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3484
66e67e41
JB		 3485 /* kick off associate process */
3486
3487 ifmgd->assoc_data = assoc_data;
3488
a1cf775d
JB		 3489 err = ieee80211_prep_connection(sdata, req->bss, true);
3490 if (err)
3491 goto err_clear;
66e67e41
JB		 3492
3493 if (!bss->dtim_period &&
3494 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3495 /*
3496 * Wait up to one beacon interval ...
3497 * should this be more if we miss one?
3498 */
bdcbd8e0
JB		 3499 sdata_info(sdata, "waiting for beacon from %pM\n",
3500 ifmgd->bssid);
3f9768a5 3501 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3502 } else {
3503 assoc_data->have_beacon = true;
3504 assoc_data->sent_assoc = false;
3505 assoc_data->timeout = jiffies;
3506 }
3507 run_again(ifmgd, assoc_data->timeout);
3508
fcff4f10
PS		 3509 if (bss->corrupt_data) {
3510 char *corrupt_type = "data";
3511 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3512 if (bss->corrupt_data &
3513 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3514 corrupt_type = "beacon and probe response";
3515 else
3516 corrupt_type = "beacon";
3517 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3518 corrupt_type = "probe response";
bdcbd8e0
JB		 3519 sdata_info(sdata, "associating with AP with corrupt %s\n",
3520 corrupt_type);
fcff4f10
PS		 3521 }
3522
66e67e41
JB		 3523 err = 0;
3524 goto out;
3525 err_clear:
3d2abdfd
EP		 3526 memset(ifmgd->bssid, 0, ETH_ALEN);
3527 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3528 ifmgd->assoc_data = NULL;
3529 err_free:
3530 kfree(assoc_data);
3531 out:
3532 mutex_unlock(&ifmgd->mtx);
3533
3534 return err;
f0706e82
JB		 3535}
3536
77fdaa12 3537int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3538 struct cfg80211_deauth_request *req)
f0706e82 3539{
46900298 3540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3541 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3542
77fdaa12
JB		 3543 mutex_lock(&ifmgd->mtx);
3544
37ad3888 3545 if (ifmgd->auth_data) {
66e67e41 3546 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3547 mutex_unlock(&ifmgd->mtx);
66e67e41 3548 return 0;
af6b6374 3549 }
77fdaa12 3550
bdcbd8e0
JB		 3551 sdata_info(sdata,
3552 "deauthenticating from %pM by local choice (reason=%d)\n",
3553 req->bssid, req->reason_code);
0ff71613 3554
37ad3888 3555 if (ifmgd->associated &&
8c7d857c 3556 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
37ad3888 3557 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3558 req->reason_code, true, frame_buf);
8c7d857c
EG		 3559 } else {
3560 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 3561 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3562 IEEE80211_STYPE_DEAUTH,
3563 req->reason_code, true,
3564 frame_buf);
8c7d857c
EG		 3565 }
3566
37ad3888
JB		 3567 mutex_unlock(&ifmgd->mtx);
3568
5fef7dbc 3569 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3570
7da7cc1d 3571 mutex_lock(&sdata->local->mtx);
bc83b681 3572 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3573 mutex_unlock(&sdata->local->mtx);
bc83b681 3574
f0706e82
JB		 3575 return 0;
3576}
84363e6e 3577
77fdaa12 3578int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3579 struct cfg80211_disassoc_request *req)
9c6bd790 3580{
77fdaa12 3581 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3582 u8 bssid[ETH_ALEN];
5fef7dbc 3583 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3584
77fdaa12 3585 mutex_lock(&ifmgd->mtx);
10f644a4 3586
8d8b261a
JB		 3587 /*
3588 * cfg80211 should catch this ... but it's racy since
3589 * we can receive a disassoc frame, process it, hand it
3590 * to cfg80211 while that's in a locked section already
3591 * trying to tell us that the user wants to disconnect.
3592 */
0c1ad2ca 3593 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3594 mutex_unlock(&ifmgd->mtx);
3595 return -ENOLINK;
3596 }
3597
bdcbd8e0
JB		 3598 sdata_info(sdata,
3599 "disassociating from %pM by local choice (reason=%d)\n",
3600 req->bss->bssid, req->reason_code);
0ff71613 3601
e69e95db 3602 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3603 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3604 req->reason_code, !req->local_state_change,
3605 frame_buf);
77fdaa12 3606 mutex_unlock(&ifmgd->mtx);
10f644a4 3607
5fef7dbc 3608 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3609
7da7cc1d 3610 mutex_lock(&sdata->local->mtx);
bc83b681 3611 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3612 mutex_unlock(&sdata->local->mtx);
bc83b681 3613
10f644a4
JB		 3614 return 0;
3615}
026331c4 3616
afa762f6 3617void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3618{
3619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3620
3621 mutex_lock(&ifmgd->mtx);
3622 if (ifmgd->assoc_data)
3623 ieee80211_destroy_assoc_data(sdata, false);
3624 if (ifmgd->auth_data)
3625 ieee80211_destroy_auth_data(sdata, false);
3626 del_timer_sync(&ifmgd->timer);
3627 mutex_unlock(&ifmgd->mtx);
3628}
3629
a97c13c3
JO		 3630void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3631 enum nl80211_cqm_rssi_threshold_event rssi_event,
3632 gfp_t gfp)
3633{
3634 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3635
b5878a2d
JB		 3636 trace_api_cqm_rssi_notify(sdata, rssi_event);
3637
a97c13c3
JO		 3638 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3639}
3640EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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