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mac80211: simplify association HT parameters
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
5fef7dbc
JB		 91#define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
149 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 150 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 151}
152
be099e82
LR		 153void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
154{
0c699c3a
LR		 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
156
8628172f
SG		 157 if (unlikely(!sdata->u.mgd.associated))
158 return;
159
be099e82
LR		 160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
161 return;
162
163 mod_timer(&sdata->u.mgd.conn_mon_timer,
164 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 165
166 ifmgd->probe_send_count = 0;
be099e82
LR		 167}
168
5484e237 169static int ecw2cw(int ecw)
60f8b39c 170{
5484e237 171 return (1 << ecw) - 1;
60f8b39c
JB		 172}
173
24398e39
JB		 174static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_ht_operation *ht_oper,
176 const u8 *bssid, bool reconfig)
d5522e03
JB		 177{
178 struct ieee80211_local *local = sdata->local;
179 struct ieee80211_supported_band *sband;
d5522e03
JB		 180 struct sta_info *sta;
181 u32 changed = 0;
9ed6bcce 182 u16 ht_opmode;
64f68e5d 183 bool disable_40 = false;
d5522e03
JB		 184
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
d5522e03 186
64f68e5d
JB		 187 switch (sdata->vif.bss_conf.channel_type) {
188 case NL80211_CHAN_HT40PLUS:
189 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
190 disable_40 = true;
191 break;
192 case NL80211_CHAN_HT40MINUS:
193 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
194 disable_40 = true;
195 break;
196 default:
197 break;
198 }
d5522e03 199
24398e39
JB		 200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 202 disable_40 = true;
203
204 mutex_lock(&local->sta_mtx);
205 sta = sta_info_get(sdata, bssid);
d5522e03 206
64f68e5d
JB		 207 WARN_ON_ONCE(!sta);
208
209 if (sta && !sta->supports_40mhz)
210 disable_40 = true;
211
212 if (sta && (!reconfig ||
91a0099c 213 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 214 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 215
64f68e5d
JB		 216 if (disable_40)
217 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
218 else
219 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 220
64f68e5d 221 rate_control_rate_update(local, sband, sta,
8f727ef3 222 IEEE80211_RC_BW_CHANGED);
0aaffa9b 223 }
64f68e5d 224 mutex_unlock(&local->sta_mtx);
d5522e03 225
074d46d1 226 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 227
228 /* if bss configuration changed store the new one */
24398e39 229 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 230 changed |= BSS_CHANGED_HT;
9ed6bcce 231 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 232 }
233
234 return changed;
235}
236
9c6bd790
JB		 237/* frame sending functions */
238
66e67e41
JB		 239static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
240 struct ieee80211_supported_band *sband,
241 u32 *rates)
242{
243 int i, j, count;
244 *rates = 0;
245 count = 0;
246 for (i = 0; i < supp_rates_len; i++) {
247 int rate = (supp_rates[i] & 0x7F) * 5;
248
249 for (j = 0; j < sband->n_bitrates; j++)
250 if (sband->bitrates[j].bitrate == rate) {
251 *rates |= BIT(j);
252 count++;
253 break;
254 }
255 }
256
257 return count;
258}
259
260static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 261 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
265{
66e67e41
JB		 266 u8 *pos;
267 u32 flags = channel->flags;
268 u16 cap;
269 struct ieee80211_sta_ht_cap ht_cap;
270
271 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
272
66e67e41
JB		 273 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
274 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
275
66e67e41
JB		 276 /* determine capability flags */
277 cap = ht_cap.cap;
278
9dde6423 279 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
282 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
283 cap &= ~IEEE80211_HT_CAP_SGI_40;
284 }
285 break;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
287 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
288 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
289 cap &= ~IEEE80211_HT_CAP_SGI_40;
290 }
291 break;
292 }
293
24398e39
JB		 294 /*
295 * If 40 MHz was disabled associate as though we weren't
296 * capable of 40 MHz -- some broken APs will never fall
297 * back to trying to transmit in 20 MHz.
298 */
299 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
300 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
301 cap &= ~IEEE80211_HT_CAP_SGI_40;
302 }
303
66e67e41
JB		 304 /* set SM PS mode properly */
305 cap &= ~IEEE80211_HT_CAP_SM_PS;
306 switch (smps) {
307 case IEEE80211_SMPS_AUTOMATIC:
308 case IEEE80211_SMPS_NUM_MODES:
309 WARN_ON(1);
310 case IEEE80211_SMPS_OFF:
311 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
312 IEEE80211_HT_CAP_SM_PS_SHIFT;
313 break;
314 case IEEE80211_SMPS_STATIC:
315 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
316 IEEE80211_HT_CAP_SM_PS_SHIFT;
317 break;
318 case IEEE80211_SMPS_DYNAMIC:
319 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
320 IEEE80211_HT_CAP_SM_PS_SHIFT;
321 break;
322 }
323
324 /* reserve and fill IE */
325 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
326 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
327}
328
329static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
330{
331 struct ieee80211_local *local = sdata->local;
332 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
333 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
334 struct sk_buff *skb;
335 struct ieee80211_mgmt *mgmt;
336 u8 *pos, qos_info;
337 size_t offset = 0, noffset;
338 int i, count, rates_len, supp_rates_len;
339 u16 capab;
340 struct ieee80211_supported_band *sband;
341 u32 rates = 0;
66e67e41
JB		 342
343 lockdep_assert_held(&ifmgd->mtx);
344
345 sband = local->hw.wiphy->bands[local->oper_channel->band];
346
347 if (assoc_data->supp_rates_len) {
348 /*
349 * Get all rates supported by the device and the AP as
350 * some APs don't like getting a superset of their rates
351 * in the association request (e.g. D-Link DAP 1353 in
352 * b-only mode)...
353 */
354 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
355 assoc_data->supp_rates_len,
356 sband, &rates);
357 } else {
358 /*
359 * In case AP not provide any supported rates information
360 * before association, we send information element(s) with
361 * all rates that we support.
362 */
363 rates = ~0;
364 rates_len = sband->n_bitrates;
365 }
366
367 skb = alloc_skb(local->hw.extra_tx_headroom +
368 sizeof(*mgmt) + /* bit too much but doesn't matter */
369 2 + assoc_data->ssid_len + /* SSID */
370 4 + rates_len + /* (extended) rates */
371 4 + /* power capability */
372 2 + 2 * sband->n_channels + /* supported channels */
373 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
374 assoc_data->ie_len + /* extra IEs */
375 9, /* WMM */
376 GFP_KERNEL);
377 if (!skb)
378 return;
379
380 skb_reserve(skb, local->hw.extra_tx_headroom);
381
382 capab = WLAN_CAPABILITY_ESS;
383
384 if (sband->band == IEEE80211_BAND_2GHZ) {
385 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
386 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
387 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
388 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
389 }
390
391 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
392 capab |= WLAN_CAPABILITY_PRIVACY;
393
394 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
395 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
396 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
397
398 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
399 memset(mgmt, 0, 24);
400 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
401 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
402 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
403
404 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
405 skb_put(skb, 10);
406 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
407 IEEE80211_STYPE_REASSOC_REQ);
408 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
409 mgmt->u.reassoc_req.listen_interval =
410 cpu_to_le16(local->hw.conf.listen_interval);
411 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
412 ETH_ALEN);
413 } else {
414 skb_put(skb, 4);
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_ASSOC_REQ);
417 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.assoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
420 }
421
422 /* SSID */
423 pos = skb_put(skb, 2 + assoc_data->ssid_len);
424 *pos++ = WLAN_EID_SSID;
425 *pos++ = assoc_data->ssid_len;
426 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
427
428 /* add all rates which were marked to be used above */
429 supp_rates_len = rates_len;
430 if (supp_rates_len > 8)
431 supp_rates_len = 8;
432
433 pos = skb_put(skb, supp_rates_len + 2);
434 *pos++ = WLAN_EID_SUPP_RATES;
435 *pos++ = supp_rates_len;
436
437 count = 0;
438 for (i = 0; i < sband->n_bitrates; i++) {
439 if (BIT(i) & rates) {
440 int rate = sband->bitrates[i].bitrate;
441 *pos++ = (u8) (rate / 5);
442 if (++count == 8)
443 break;
444 }
445 }
446
447 if (rates_len > count) {
448 pos = skb_put(skb, rates_len - count + 2);
449 *pos++ = WLAN_EID_EXT_SUPP_RATES;
450 *pos++ = rates_len - count;
451
452 for (i++; i < sband->n_bitrates; i++) {
453 if (BIT(i) & rates) {
454 int rate = sband->bitrates[i].bitrate;
455 *pos++ = (u8) (rate / 5);
456 }
457 }
458 }
459
460 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
461 /* 1. power capabilities */
462 pos = skb_put(skb, 4);
463 *pos++ = WLAN_EID_PWR_CAPABILITY;
464 *pos++ = 2;
465 *pos++ = 0; /* min tx power */
466 *pos++ = local->oper_channel->max_power; /* max tx power */
467
468 /* 2. supported channels */
469 /* TODO: get this in reg domain format */
470 pos = skb_put(skb, 2 * sband->n_channels + 2);
471 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
472 *pos++ = 2 * sband->n_channels;
473 for (i = 0; i < sband->n_channels; i++) {
474 *pos++ = ieee80211_frequency_to_channel(
475 sband->channels[i].center_freq);
476 *pos++ = 1; /* one channel in the subband*/
477 }
478 }
479
480 /* if present, add any custom IEs that go before HT */
481 if (assoc_data->ie_len && assoc_data->ie) {
482 static const u8 before_ht[] = {
483 WLAN_EID_SSID,
484 WLAN_EID_SUPP_RATES,
485 WLAN_EID_EXT_SUPP_RATES,
486 WLAN_EID_PWR_CAPABILITY,
487 WLAN_EID_SUPPORTED_CHANNELS,
488 WLAN_EID_RSN,
489 WLAN_EID_QOS_CAPA,
490 WLAN_EID_RRM_ENABLED_CAPABILITIES,
491 WLAN_EID_MOBILITY_DOMAIN,
492 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
493 };
494 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
495 before_ht, ARRAY_SIZE(before_ht),
496 offset);
497 pos = skb_put(skb, noffset - offset);
498 memcpy(pos, assoc_data->ie + offset, noffset - offset);
499 offset = noffset;
500 }
501
4e74bfdb 502 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
9dde6423 503 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
66e67e41
JB		 504 sband, local->oper_channel, ifmgd->ap_smps);
505
506 /* if present, add any custom non-vendor IEs that go after HT */
507 if (assoc_data->ie_len && assoc_data->ie) {
508 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
509 assoc_data->ie_len,
510 offset);
511 pos = skb_put(skb, noffset - offset);
512 memcpy(pos, assoc_data->ie + offset, noffset - offset);
513 offset = noffset;
514 }
515
76f0303d
JB		 516 if (assoc_data->wmm) {
517 if (assoc_data->uapsd) {
dc41e4d4
EP		 518 qos_info = ifmgd->uapsd_queues;
519 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 520 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
521 } else {
522 qos_info = 0;
523 }
524
525 pos = skb_put(skb, 9);
526 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
527 *pos++ = 7; /* len */
528 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
529 *pos++ = 0x50;
530 *pos++ = 0xf2;
531 *pos++ = 2; /* WME */
532 *pos++ = 0; /* WME info */
533 *pos++ = 1; /* WME ver */
534 *pos++ = qos_info;
535 }
536
537 /* add any remaining custom (i.e. vendor specific here) IEs */
538 if (assoc_data->ie_len && assoc_data->ie) {
539 noffset = assoc_data->ie_len;
540 pos = skb_put(skb, noffset - offset);
541 memcpy(pos, assoc_data->ie + offset, noffset - offset);
542 }
543
544 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
545 ieee80211_tx_skb(sdata, skb);
546}
547
ef422bc0 548static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 549 const u8 *bssid, u16 stype,
5fef7dbc
JB		 550 u16 reason, bool send_frame,
551 u8 *frame_buf)
9ac19a90
JB		 552{
553 struct ieee80211_local *local = sdata->local;
46900298 554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 555 struct sk_buff *skb;
5fef7dbc 556 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 557
5fef7dbc
JB		 558 /* build frame */
559 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
560 mgmt->duration = 0; /* initialize only */
561 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 562 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 563 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 564 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 565 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 566 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
567
5fef7dbc
JB		 568 if (send_frame) {
569 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
570 DEAUTH_DISASSOC_LEN);
571 if (!skb)
572 return;
d5cdfacb 573
5fef7dbc
JB		 574 skb_reserve(skb, local->hw.extra_tx_headroom);
575
576 /* copy in frame */
577 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
578 mgmt, DEAUTH_DISASSOC_LEN);
579
580 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
581 IEEE80211_SKB_CB(skb)->flags |=
582 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 583 ieee80211_tx_skb(sdata, skb);
5fef7dbc 584 }
9ac19a90
JB		 585}
586
572e0012
KV		 587void ieee80211_send_pspoll(struct ieee80211_local *local,
588 struct ieee80211_sub_if_data *sdata)
589{
572e0012
KV		 590 struct ieee80211_pspoll *pspoll;
591 struct sk_buff *skb;
572e0012 592
d8cd189e
KV		 593 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
594 if (!skb)
572e0012 595 return;
572e0012 596
d8cd189e
KV		 597 pspoll = (struct ieee80211_pspoll *) skb->data;
598 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 599
62ae67be
JB		 600 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
601 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 602}
603
965bedad
JB		 604void ieee80211_send_nullfunc(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata,
606 int powersave)
607{
608 struct sk_buff *skb;
d8cd189e 609 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 610 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 611
d8cd189e
KV		 612 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
613 if (!skb)
965bedad 614 return;
965bedad 615
d8cd189e 616 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 617 if (powersave)
d8cd189e 618 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 619
62ae67be 620 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 621 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
622 IEEE80211_STA_CONNECTION_POLL))
623 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
624
62ae67be 625 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 626}
627
d524215f
FF		 628static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
629 struct ieee80211_sub_if_data *sdata)
630{
631 struct sk_buff *skb;
632 struct ieee80211_hdr *nullfunc;
633 __le16 fc;
634
635 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
636 return;
637
638 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 639 if (!skb)
d524215f 640 return;
d15b8459 641
d524215f
FF		 642 skb_reserve(skb, local->hw.extra_tx_headroom);
643
644 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
645 memset(nullfunc, 0, 30);
646 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
647 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
648 nullfunc->frame_control = fc;
649 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
650 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
651 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
652 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
653
654 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
655 ieee80211_tx_skb(sdata, skb);
656}
657
cc32abd4
JB		 658/* spectrum management related things */
659static void ieee80211_chswitch_work(struct work_struct *work)
660{
661 struct ieee80211_sub_if_data *sdata =
662 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
664
9607e6b6 665 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 666 return;
667
77fdaa12
JB		 668 mutex_lock(&ifmgd->mtx);
669 if (!ifmgd->associated)
670 goto out;
cc32abd4
JB		 671
672 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 673 if (!sdata->local->ops->channel_switch) {
674 /* call "hw_config" only if doing sw channel switch */
675 ieee80211_hw_config(sdata->local,
676 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 677 } else {
678 /* update the device channel directly */
679 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 680 }
77fdaa12 681
cc32abd4 682 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 683 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 684
cc32abd4
JB		 685 ieee80211_wake_queues_by_reason(&sdata->local->hw,
686 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 687 out:
688 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
689 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 690}
691
5ce6e438
JB		 692void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
693{
694 struct ieee80211_sub_if_data *sdata;
695 struct ieee80211_if_managed *ifmgd;
696
697 sdata = vif_to_sdata(vif);
698 ifmgd = &sdata->u.mgd;
699
700 trace_api_chswitch_done(sdata, success);
701 if (!success) {
702 /*
703 * If the channel switch was not successful, stay
704 * around on the old channel. We currently lack
705 * good handling of this situation, possibly we
706 * should just drop the association.
707 */
708 sdata->local->csa_channel = sdata->local->oper_channel;
709 }
710
711 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
712}
713EXPORT_SYMBOL(ieee80211_chswitch_done);
714
cc32abd4
JB		 715static void ieee80211_chswitch_timer(unsigned long data)
716{
717 struct ieee80211_sub_if_data *sdata =
718 (struct ieee80211_sub_if_data *) data;
719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
720
5bb644a0
JB		 721 if (sdata->local->quiescing) {
722 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
723 return;
724 }
725
42935eca 726 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 727}
728
729void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
730 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 731 struct ieee80211_bss *bss,
732 u64 timestamp)
cc32abd4 733{
0c1ad2ca
JB		 734 struct cfg80211_bss *cbss =
735 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 736 struct ieee80211_channel *new_ch;
737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 738 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
739 cbss->channel->band);
cc32abd4 740
77fdaa12
JB		 741 ASSERT_MGD_MTX(ifmgd);
742
743 if (!ifmgd->associated)
cc32abd4
JB		 744 return;
745
fbe9c429 746 if (sdata->local->scanning)
cc32abd4
JB		 747 return;
748
749 /* Disregard subsequent beacons if we are already running a timer
750 processing a CSA */
751
752 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
753 return;
754
755 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
756 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
757 return;
758
759 sdata->local->csa_channel = new_ch;
760
5ce6e438
JB		 761 if (sdata->local->ops->channel_switch) {
762 /* use driver's channel switch callback */
763 struct ieee80211_channel_switch ch_switch;
764 memset(&ch_switch, 0, sizeof(ch_switch));
765 ch_switch.timestamp = timestamp;
766 if (sw_elem->mode) {
767 ch_switch.block_tx = true;
768 ieee80211_stop_queues_by_reason(&sdata->local->hw,
769 IEEE80211_QUEUE_STOP_REASON_CSA);
770 }
771 ch_switch.channel = new_ch;
772 ch_switch.count = sw_elem->count;
773 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
774 drv_channel_switch(sdata->local, &ch_switch);
775 return;
776 }
777
778 /* channel switch handled in software */
cc32abd4 779 if (sw_elem->count <= 1) {
42935eca 780 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 781 } else {
9feaddc7
WYG		 782 if (sw_elem->mode)
783 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 784 IEEE80211_QUEUE_STOP_REASON_CSA);
785 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
786 mod_timer(&ifmgd->chswitch_timer,
787 jiffies +
788 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 789 cbss->beacon_interval));
cc32abd4
JB		 790 }
791}
792
793static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
794 u16 capab_info, u8 *pwr_constr_elem,
795 u8 pwr_constr_elem_len)
796{
797 struct ieee80211_conf *conf = &sdata->local->hw.conf;
798
799 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
800 return;
801
802 /* Power constraint IE length should be 1 octet */
803 if (pwr_constr_elem_len != 1)
804 return;
805
a48b13ac 806 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 807 (*pwr_constr_elem != sdata->local->power_constr_level)) {
808 sdata->local->power_constr_level = *pwr_constr_elem;
809 ieee80211_hw_config(sdata->local, 0);
810 }
811}
812
f90754c1
JO		 813void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
814{
815 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
816 struct ieee80211_local *local = sdata->local;
817 struct ieee80211_conf *conf = &local->hw.conf;
818
819 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
820 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
821 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
822
823 local->disable_dynamic_ps = false;
824 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
825}
826EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
827
828void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
829{
830 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
831 struct ieee80211_local *local = sdata->local;
832 struct ieee80211_conf *conf = &local->hw.conf;
833
834 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
835 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
836 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
837
838 local->disable_dynamic_ps = true;
839 conf->dynamic_ps_timeout = 0;
840 del_timer_sync(&local->dynamic_ps_timer);
841 ieee80211_queue_work(&local->hw,
842 &local->dynamic_ps_enable_work);
843}
844EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
845
965bedad
JB		 846/* powersave */
847static void ieee80211_enable_ps(struct ieee80211_local *local,
848 struct ieee80211_sub_if_data *sdata)
849{
850 struct ieee80211_conf *conf = &local->hw.conf;
851
d5edaedc
JB		 852 /*
853 * If we are scanning right now then the parameters will
854 * take effect when scan finishes.
855 */
fbe9c429 856 if (local->scanning)
d5edaedc
JB		 857 return;
858
965bedad
JB		 859 if (conf->dynamic_ps_timeout > 0 &&
860 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
861 mod_timer(&local->dynamic_ps_timer, jiffies +
862 msecs_to_jiffies(conf->dynamic_ps_timeout));
863 } else {
864 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
865 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 866
2a13052f
JO		 867 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
868 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
869 return;
870
871 conf->flags |= IEEE80211_CONF_PS;
872 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 873 }
874}
875
876static void ieee80211_change_ps(struct ieee80211_local *local)
877{
878 struct ieee80211_conf *conf = &local->hw.conf;
879
880 if (local->ps_sdata) {
965bedad
JB		 881 ieee80211_enable_ps(local, local->ps_sdata);
882 } else if (conf->flags & IEEE80211_CONF_PS) {
883 conf->flags &= ~IEEE80211_CONF_PS;
884 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
885 del_timer_sync(&local->dynamic_ps_timer);
886 cancel_work_sync(&local->dynamic_ps_enable_work);
887 }
888}
889
808118cb
JY		 890static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
891{
892 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
893 struct sta_info *sta = NULL;
c2c98fde 894 bool authorized = false;
808118cb
JY		 895
896 if (!mgd->powersave)
897 return false;
898
05cb9108
JB		 899 if (mgd->broken_ap)
900 return false;
901
808118cb
JY		 902 if (!mgd->associated)
903 return false;
904
905 if (!mgd->associated->beacon_ies)
906 return false;
907
908 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
909 IEEE80211_STA_CONNECTION_POLL))
910 return false;
911
912 rcu_read_lock();
913 sta = sta_info_get(sdata, mgd->bssid);
914 if (sta)
c2c98fde 915 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 916 rcu_read_unlock();
917
c2c98fde 918 return authorized;
808118cb
JY		 919}
920
965bedad 921/* need to hold RTNL or interface lock */
10f644a4 922void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 923{
924 struct ieee80211_sub_if_data *sdata, *found = NULL;
925 int count = 0;
195e294d 926 int timeout;
965bedad
JB		 927
928 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
929 local->ps_sdata = NULL;
930 return;
931 }
932
af6b6374
JB		 933 if (!list_empty(&local->work_list)) {
934 local->ps_sdata = NULL;
935 goto change;
936 }
937
965bedad 938 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 939 if (!ieee80211_sdata_running(sdata))
965bedad 940 continue;
8c7914de
RM		 941 if (sdata->vif.type == NL80211_IFTYPE_AP) {
942 /* If an AP vif is found, then disable PS
943 * by setting the count to zero thereby setting
944 * ps_sdata to NULL.
945 */
946 count = 0;
947 break;
948 }
965bedad
JB		 949 if (sdata->vif.type != NL80211_IFTYPE_STATION)
950 continue;
951 found = sdata;
952 count++;
953 }
954
808118cb 955 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 956 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 957 s32 beaconint_us;
958
959 if (latency < 0)
ed77134b 960 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 961
962 beaconint_us = ieee80211_tu_to_usec(
963 found->vif.bss_conf.beacon_int);
964
ff616381 965 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 966 if (timeout < 0) {
967 /*
ff616381
JO		 968 * Go to full PSM if the user configures a very low
969 * latency requirement.
0ab82b04
EP		 970 * The 2000 second value is there for compatibility
971 * until the PM_QOS_NETWORK_LATENCY is configured
972 * with real values.
195e294d 973 */
0ab82b04
EP		 974 if (latency > (1900 * USEC_PER_MSEC) &&
975 latency != (2000 * USEC_PER_SEC))
195e294d 976 timeout = 0;
ff616381
JO		 977 else
978 timeout = 100;
195e294d 979 }
f90754c1
JO		 980 local->dynamic_ps_user_timeout = timeout;
981 if (!local->disable_dynamic_ps)
982 conf->dynamic_ps_timeout =
983 local->dynamic_ps_user_timeout;
195e294d 984
04fe2037 985 if (beaconint_us > latency) {
10f644a4 986 local->ps_sdata = NULL;
04fe2037 987 } else {
56007a02 988 struct ieee80211_bss *bss;
04fe2037 989 int maxslp = 1;
56007a02 990 u8 dtimper;
04fe2037 991
56007a02
JB		 992 bss = (void *)found->u.mgd.associated->priv;
993 dtimper = bss->dtim_period;
994
995 /* If the TIM IE is invalid, pretend the value is 1 */
996 if (!dtimper)
997 dtimper = 1;
998 else if (dtimper > 1)
04fe2037
JB		 999 maxslp = min_t(int, dtimper,
1000 latency / beaconint_us);
1001
9ccebe61 1002 local->hw.conf.max_sleep_period = maxslp;
56007a02 1003 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1004 local->ps_sdata = found;
04fe2037 1005 }
10f644a4 1006 } else {
965bedad 1007 local->ps_sdata = NULL;
10f644a4 1008 }
965bedad 1009
af6b6374 1010 change:
965bedad
JB		 1011 ieee80211_change_ps(local);
1012}
1013
1014void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1015{
1016 struct ieee80211_local *local =
1017 container_of(work, struct ieee80211_local,
1018 dynamic_ps_disable_work);
1019
1020 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1021 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1022 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1023 }
1024
1025 ieee80211_wake_queues_by_reason(&local->hw,
1026 IEEE80211_QUEUE_STOP_REASON_PS);
1027}
1028
1029void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1030{
1031 struct ieee80211_local *local =
1032 container_of(work, struct ieee80211_local,
1033 dynamic_ps_enable_work);
1034 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1035 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1036 unsigned long flags;
1037 int q;
965bedad
JB		 1038
1039 /* can only happen when PS was just disabled anyway */
1040 if (!sdata)
1041 return;
1042
5e34069c
CL		 1043 ifmgd = &sdata->u.mgd;
1044
965bedad
JB		 1045 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1046 return;
1047
77b7023a
AN		 1048 if (!local->disable_dynamic_ps &&
1049 local->hw.conf.dynamic_ps_timeout > 0) {
1050 /* don't enter PS if TX frames are pending */
1051 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1052 mod_timer(&local->dynamic_ps_timer, jiffies +
1053 msecs_to_jiffies(
1054 local->hw.conf.dynamic_ps_timeout));
1055 return;
1056 }
77b7023a
AN		 1057
1058 /*
1059 * transmission can be stopped by others which leads to
1060 * dynamic_ps_timer expiry. Postpone the ps timer if it
1061 * is not the actual idle state.
1062 */
1063 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1064 for (q = 0; q < local->hw.queues; q++) {
1065 if (local->queue_stop_reasons[q]) {
1066 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1067 flags);
1068 mod_timer(&local->dynamic_ps_timer, jiffies +
1069 msecs_to_jiffies(
1070 local->hw.conf.dynamic_ps_timeout));
1071 return;
1072 }
1073 }
1074 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1075 }
1ddc2867 1076
375177bf 1077 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1078 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1079 netif_tx_stop_all_queues(sdata->dev);
965bedad 1080
e8306f98
VN		 1081 if (drv_tx_frames_pending(local))
1082 mod_timer(&local->dynamic_ps_timer, jiffies +
1083 msecs_to_jiffies(
1084 local->hw.conf.dynamic_ps_timeout));
1085 else {
1086 ieee80211_send_nullfunc(local, sdata, 1);
1087 /* Flush to get the tx status of nullfunc frame */
1088 drv_flush(local, false);
1089 }
f3e85b9e
VN		 1090 }
1091
2a13052f
JO		 1092 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1093 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1094 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1095 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1096 local->hw.conf.flags |= IEEE80211_CONF_PS;
1097 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1098 }
f3e85b9e 1099
77b7023a
AN		 1100 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1101 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1102}
1103
1104void ieee80211_dynamic_ps_timer(unsigned long data)
1105{
1106 struct ieee80211_local *local = (void *) data;
1107
78f1a8b7 1108 if (local->quiescing || local->suspended)
5bb644a0
JB		 1109 return;
1110
42935eca 1111 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1112}
1113
60f8b39c 1114/* MLME */
f698d856 1115static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1116 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1117 u8 *wmm_param, size_t wmm_param_len)
1118{
f0706e82 1119 struct ieee80211_tx_queue_params params;
4ced3f74 1120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1121 size_t left;
1122 int count;
ab13315a 1123 u8 *pos, uapsd_queues = 0;
f0706e82 1124
e1b3ec1a
SG		 1125 if (!local->ops->conf_tx)
1126 return;
1127
32c5057b 1128 if (local->hw.queues < IEEE80211_NUM_ACS)
3434fbd3
JB		 1129 return;
1130
1131 if (!wmm_param)
1132 return;
1133
f0706e82
JB		 1134 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1135 return;
ab13315a
KV		 1136
1137 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1138 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1139
f0706e82 1140 count = wmm_param[6] & 0x0f;
46900298 1141 if (count == ifmgd->wmm_last_param_set)
f0706e82 1142 return;
46900298 1143 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1144
1145 pos = wmm_param + 8;
1146 left = wmm_param_len - 8;
1147
1148 memset(&params, 0, sizeof(params));
1149
f0706e82
JB		 1150 local->wmm_acm = 0;
1151 for (; left >= 4; left -= 4, pos += 4) {
1152 int aci = (pos[0] >> 5) & 0x03;
1153 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1154 bool uapsd = false;
f0706e82
JB		 1155 int queue;
1156
1157 switch (aci) {
0eeb59fe 1158 case 1: /* AC_BK */
e100bb64 1159 queue = 3;
988c0f72 1160 if (acm)
0eeb59fe 1161 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1162 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1163 uapsd = true;
f0706e82 1164 break;
0eeb59fe 1165 case 2: /* AC_VI */
e100bb64 1166 queue = 1;
988c0f72 1167 if (acm)
0eeb59fe 1168 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1169 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1170 uapsd = true;
f0706e82 1171 break;
0eeb59fe 1172 case 3: /* AC_VO */
e100bb64 1173 queue = 0;
988c0f72 1174 if (acm)
0eeb59fe 1175 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1176 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1177 uapsd = true;
f0706e82 1178 break;
0eeb59fe 1179 case 0: /* AC_BE */
f0706e82 1180 default:
e100bb64 1181 queue = 2;
988c0f72 1182 if (acm)
0eeb59fe 1183 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1184 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1185 uapsd = true;
f0706e82
JB		 1186 break;
1187 }
1188
1189 params.aifs = pos[0] & 0x0f;
1190 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1191 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1192 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1193 params.uapsd = uapsd;
1194
f4ea83dd 1195#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1196 wiphy_debug(local->hw.wiphy,
1197 "WMM queue=%d aci=%d acm=%d aifs=%d "
1198 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1199 queue, aci, acm,
1200 params.aifs, params.cw_min, params.cw_max,
1201 params.txop, params.uapsd);
3330d7be 1202#endif
f6f3def3
EP		 1203 sdata->tx_conf[queue] = params;
1204 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1205 wiphy_debug(local->hw.wiphy,
1206 "failed to set TX queue parameters for queue %d\n",
1207 queue);
f0706e82 1208 }
e1b3ec1a
SG		 1209
1210 /* enable WMM or activate new settings */
4ced3f74 1211 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1212}
1213
7a5158ef
JB		 1214static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1215 u16 capab, bool erp_valid, u8 erp)
5628221c 1216{
bda3933a 1217 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1218 u32 changed = 0;
7a5158ef
JB		 1219 bool use_protection;
1220 bool use_short_preamble;
1221 bool use_short_slot;
1222
1223 if (erp_valid) {
1224 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1225 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1226 } else {
1227 use_protection = false;
1228 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1229 }
1230
1231 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1232 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1233 use_short_slot = true;
5628221c 1234
471b3efd 1235 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1236 bss_conf->use_cts_prot = use_protection;
1237 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1238 }
7e9ed188 1239
d43c7b37 1240 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1241 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1242 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1243 }
d9430a32 1244
7a5158ef 1245 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1246 bss_conf->use_short_slot = use_short_slot;
1247 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1248 }
1249
1250 return changed;
1251}
1252
f698d856 1253static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1254 struct cfg80211_bss *cbss,
ae5eb026 1255 u32 bss_info_changed)
f0706e82 1256{
0c1ad2ca 1257 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1258 struct ieee80211_local *local = sdata->local;
68542962 1259 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1260
ae5eb026 1261 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1262 /* set timing information */
68542962 1263 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1264 bss_conf->last_tsf = cbss->tsf;
5628221c 1265
77fdaa12
JB		 1266 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1267 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1268 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1269
7ccc8bd7
FF		 1270 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1271 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1272
0c1ad2ca
JB		 1273 sdata->u.mgd.associated = cbss;
1274 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1275
17e4ec14
JM		 1276 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1277
b291ba11
JB		 1278 /* just to be sure */
1279 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1280 IEEE80211_STA_BEACON_POLL);
1281
9ac19a90 1282 ieee80211_led_assoc(local, 1);
9306102e 1283
e5b900d2
JB		 1284 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1285 bss_conf->dtim_period = bss->dtim_period;
1286 else
1287 bss_conf->dtim_period = 0;
1288
68542962 1289 bss_conf->assoc = 1;
9cef8737 1290
a97c13c3 1291 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1292 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1293 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1294 bss_info_changed |= BSS_CHANGED_CQM;
1295
68542962
JO		 1296 /* Enable ARP filtering */
1297 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1298 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1299 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1300 }
1301
ae5eb026 1302 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1303
056508dc
JB		 1304 mutex_lock(&local->iflist_mtx);
1305 ieee80211_recalc_ps(local, -1);
025e6be2 1306 ieee80211_recalc_smps(local);
056508dc 1307 mutex_unlock(&local->iflist_mtx);
e0cb686f 1308
8a5b33f5 1309 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1310 netif_carrier_on(sdata->dev);
f0706e82
JB		 1311}
1312
e69e95db 1313static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1314 u16 stype, u16 reason, bool tx,
1315 u8 *frame_buf)
aa458d17 1316{
46900298 1317 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1318 struct ieee80211_local *local = sdata->local;
1319 struct sta_info *sta;
3cc5240b 1320 u32 changed = 0;
b291ba11 1321 u8 bssid[ETH_ALEN];
aa458d17 1322
77fdaa12
JB		 1323 ASSERT_MGD_MTX(ifmgd);
1324
37ad3888
JB		 1325 if (WARN_ON_ONCE(tx && !frame_buf))
1326 return;
1327
b291ba11
JB		 1328 if (WARN_ON(!ifmgd->associated))
1329 return;
1330
0c1ad2ca 1331 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1332
77fdaa12
JB		 1333 ifmgd->associated = NULL;
1334 memset(ifmgd->bssid, 0, ETH_ALEN);
1335
1336 /*
1337 * we need to commit the associated = NULL change because the
1338 * scan code uses that to determine whether this iface should
1339 * go to/wake up from powersave or not -- and could otherwise
1340 * wake the queues erroneously.
1341 */
1342 smp_mb();
1343
1344 /*
1345 * Thus, we can only afterwards stop the queues -- to account
1346 * for the case where another CPU is finishing a scan at this
1347 * time -- we don't want the scan code to enable queues.
1348 */
aa458d17 1349
8a5b33f5 1350 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1351 netif_carrier_off(sdata->dev);
1352
2a419056 1353 mutex_lock(&local->sta_mtx);
abe60632 1354 sta = sta_info_get(sdata, bssid);
4cad6c7c 1355 if (sta) {
c2c98fde 1356 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1357 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1358 }
2a419056 1359 mutex_unlock(&local->sta_mtx);
aa458d17 1360
37ad3888
JB		 1361 /* deauthenticate/disassociate now */
1362 if (tx || frame_buf)
1363 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1364 tx, frame_buf);
1365
1366 /* flush out frame */
1367 if (tx)
1368 drv_flush(local, false);
1369
1370 /* remove AP and TDLS peers */
1371 sta_info_flush(local, sdata);
1372
1373 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1374 changed |= ieee80211_reset_erp_info(sdata);
1375
f5e5bf25 1376 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1377 changed |= BSS_CHANGED_ASSOC;
1378 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1379
413ad50a 1380 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1381 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1382 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1383
a8302de9
VT		 1384 local->power_constr_level = 0;
1385
520eb820
KV		 1386 del_timer_sync(&local->dynamic_ps_timer);
1387 cancel_work_sync(&local->dynamic_ps_enable_work);
1388
e0cb686f
KV		 1389 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1390 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1391 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1392 }
a331400b 1393 local->ps_sdata = NULL;
ae5eb026 1394
68542962
JO		 1395 /* Disable ARP filtering */
1396 if (sdata->vif.bss_conf.arp_filter_enabled) {
1397 sdata->vif.bss_conf.arp_filter_enabled = false;
1398 changed |= BSS_CHANGED_ARP_FILTER;
1399 }
1400
3abead59
JB		 1401 sdata->vif.bss_conf.qos = false;
1402 changed |= BSS_CHANGED_QOS;
1403
0aaffa9b
JB		 1404 /* The BSSID (not really interesting) and HT changed */
1405 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1406 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1407
3cc5240b
JB		 1408 /* channel(_type) changes are handled by ieee80211_hw_config */
1409 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1410 ieee80211_hw_config(local, 0);
1411
3abead59
JB		 1412 /* disassociated - set to defaults now */
1413 ieee80211_set_wmm_default(sdata, false);
1414
b9dcf712
JB		 1415 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1416 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1417 del_timer_sync(&sdata->u.mgd.timer);
1418 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1419}
f0706e82 1420
3cf335d5
KV		 1421void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1422 struct ieee80211_hdr *hdr)
1423{
1424 /*
1425 * We can postpone the mgd.timer whenever receiving unicast frames
1426 * from AP because we know that the connection is working both ways
1427 * at that time. But multicast frames (and hence also beacons) must
1428 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1429 * data idle periods for sending the periodic probe request to the
1430 * AP we're connected to.
3cf335d5 1431 */
b291ba11
JB		 1432 if (is_multicast_ether_addr(hdr->addr1))
1433 return;
1434
be099e82 1435 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1436}
f0706e82 1437
4e5ff376
FF		 1438static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1439{
1440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1441 struct ieee80211_local *local = sdata->local;
4e5ff376 1442
133d40f9 1443 mutex_lock(&local->mtx);
4e5ff376 1444 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1445 IEEE80211_STA_CONNECTION_POLL))) {
1446 mutex_unlock(&local->mtx);
1447 return;
1448 }
4e5ff376
FF		 1449
1450 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1451 IEEE80211_STA_BEACON_POLL);
133d40f9
SG		 1452
1453 mutex_lock(&local->iflist_mtx);
1454 ieee80211_recalc_ps(local, -1);
1455 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1456
1457 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1458 goto out;
4e5ff376
FF		 1459
1460 /*
1461 * We've received a probe response, but are not sure whether
1462 * we have or will be receiving any beacons or data, so let's
1463 * schedule the timers again, just in case.
1464 */
1465 ieee80211_sta_reset_beacon_monitor(sdata);
1466
1467 mod_timer(&ifmgd->conn_mon_timer,
1468 round_jiffies_up(jiffies +
1469 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9
SG		 1470out:
1471 ieee80211_run_deferred_scan(local);
1472 mutex_unlock(&local->mtx);
4e5ff376
FF		 1473}
1474
1475void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1476 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1477{
75706d0e 1478 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1479 return;
1480
04ac3c0e
FF		 1481 if (ack)
1482 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1483
1484 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1485 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1486 if (ack)
1487 sdata->u.mgd.probe_send_count = 0;
1488 else
1489 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1490 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1491 }
1492}
1493
a43abf29
ML		 1494static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1495{
1496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1497 const u8 *ssid;
f01a067d 1498 u8 *dst = ifmgd->associated->bssid;
180205bd 1499 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1500
1501 /*
1502 * Try sending broadcast probe requests for the last three
1503 * probe requests after the first ones failed since some
1504 * buggy APs only support broadcast probe requests.
1505 */
1506 if (ifmgd->probe_send_count >= unicast_limit)
1507 dst = NULL;
a43abf29 1508
4e5ff376
FF		 1509 /*
1510 * When the hardware reports an accurate Tx ACK status, it's
1511 * better to send a nullfunc frame instead of a probe request,
1512 * as it will kick us off the AP quickly if we aren't associated
1513 * anymore. The timeout will be reset if the frame is ACKed by
1514 * the AP.
1515 */
992e68bf
SD		 1516 ifmgd->probe_send_count++;
1517
04ac3c0e
FF		 1518 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1519 ifmgd->nullfunc_failed = false;
4e5ff376 1520 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1521 } else {
88c868c4
SG		 1522 int ssid_len;
1523
4e5ff376 1524 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1525 if (WARN_ON_ONCE(ssid == NULL))
1526 ssid_len = 0;
1527 else
1528 ssid_len = ssid[1];
1529
1530 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1531 0, (u32) -1, true, false);
4e5ff376 1532 }
a43abf29 1533
180205bd 1534 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1535 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1536 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1537 drv_flush(sdata->local, false);
a43abf29
ML		 1538}
1539
b291ba11
JB		 1540static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1541 bool beacon)
04de8381 1542{
04de8381 1543 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1544 bool already = false;
34bfc411 1545
9607e6b6 1546 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1547 return;
1548
77fdaa12
JB		 1549 mutex_lock(&ifmgd->mtx);
1550
1551 if (!ifmgd->associated)
1552 goto out;
1553
133d40f9
SG		 1554 mutex_lock(&sdata->local->mtx);
1555
1556 if (sdata->local->tmp_channel || sdata->local->scanning) {
1557 mutex_unlock(&sdata->local->mtx);
1558 goto out;
1559 }
1560
a860402d 1561#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 1562 if (beacon)
1563 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1564 sdata->name);
a860402d 1565#endif
6efb71b0
HS		 1566 ieee80211_cqm_rssi_notify(&sdata->vif,
1567 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1568
b291ba11
JB		 1569 /*
1570 * The driver/our work has already reported this event or the
1571 * connection monitoring has kicked in and we have already sent
1572 * a probe request. Or maybe the AP died and the driver keeps
1573 * reporting until we disassociate...
1574 *
1575 * In either case we have to ignore the current call to this
1576 * function (except for setting the correct probe reason bit)
1577 * because otherwise we would reset the timer every time and
1578 * never check whether we received a probe response!
1579 */
1580 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1581 IEEE80211_STA_CONNECTION_POLL))
1582 already = true;
1583
1584 if (beacon)
1585 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1586 else
1587 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1588
133d40f9
SG		 1589 mutex_unlock(&sdata->local->mtx);
1590
b291ba11
JB		 1591 if (already)
1592 goto out;
1593
4e751843
JB		 1594 mutex_lock(&sdata->local->iflist_mtx);
1595 ieee80211_recalc_ps(sdata->local, -1);
1596 mutex_unlock(&sdata->local->iflist_mtx);
1597
a43abf29
ML		 1598 ifmgd->probe_send_count = 0;
1599 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1600 out:
1601 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1602}
1603
a619a4c0
JO		 1604struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1605 struct ieee80211_vif *vif)
1606{
1607 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1608 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1609 struct sk_buff *skb;
1610 const u8 *ssid;
88c868c4 1611 int ssid_len;
a619a4c0
JO		 1612
1613 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1614 return NULL;
1615
1616 ASSERT_MGD_MTX(ifmgd);
1617
1618 if (!ifmgd->associated)
1619 return NULL;
1620
1621 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1622 if (WARN_ON_ONCE(ssid == NULL))
1623 ssid_len = 0;
1624 else
1625 ssid_len = ssid[1];
1626
a619a4c0 1627 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
88c868c4 1628 (u32) -1, ssid + 2, ssid_len,
85a237fe 1629 NULL, 0, true);
a619a4c0
JO		 1630
1631 return skb;
1632}
1633EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1634
1e4dcd01
JO		 1635static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1636{
1637 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1638 struct ieee80211_local *local = sdata->local;
1639 u8 bssid[ETH_ALEN];
5fef7dbc 1640 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1641
1642 mutex_lock(&ifmgd->mtx);
1643 if (!ifmgd->associated) {
1644 mutex_unlock(&ifmgd->mtx);
1645 return;
1646 }
1647
1648 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1649
f0d23208 1650 pr_debug("%s: Connection to AP %pM lost\n", sdata->name, bssid);
1e4dcd01 1651
37ad3888
JB		 1652 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1653 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1654 false, frame_buf);
1e4dcd01 1655 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1656
1e4dcd01
JO		 1657 /*
1658 * must be outside lock due to cfg80211,
1659 * but that's not a problem.
1660 */
5fef7dbc 1661 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1662
1663 mutex_lock(&local->mtx);
1664 ieee80211_recalc_idle(local);
1665 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1666}
1667
1668void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1669{
1670 struct ieee80211_sub_if_data *sdata =
1671 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1672 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1673 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1674 struct sta_info *sta;
1675
1676 if (ifmgd->associated) {
30fa9047 1677 rcu_read_lock();
a85e1d55
PS		 1678 sta = sta_info_get(sdata, ifmgd->bssid);
1679 if (sta)
1680 sta->beacon_loss_count++;
30fa9047 1681 rcu_read_unlock();
a85e1d55 1682 }
b291ba11 1683
1e4dcd01
JO		 1684 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1685 __ieee80211_connection_loss(sdata);
1686 else
1687 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1688}
1689
04de8381
KV		 1690void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1691{
1692 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1693 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1694
b5878a2d
JB		 1695 trace_api_beacon_loss(sdata);
1696
1e4dcd01
JO		 1697 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1698 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1699}
1700EXPORT_SYMBOL(ieee80211_beacon_loss);
1701
1e4dcd01
JO		 1702void ieee80211_connection_loss(struct ieee80211_vif *vif)
1703{
1704 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1705 struct ieee80211_hw *hw = &sdata->local->hw;
1706
b5878a2d
JB		 1707 trace_api_connection_loss(sdata);
1708
1e4dcd01
JO		 1709 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1710 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1711}
1712EXPORT_SYMBOL(ieee80211_connection_loss);
1713
1714
66e67e41
JB		 1715static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1716 bool assoc)
1717{
1718 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1719
1720 lockdep_assert_held(&sdata->u.mgd.mtx);
1721
66e67e41
JB		 1722 if (!assoc) {
1723 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1724
1725 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1726 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1727 }
1728
1729 cfg80211_put_bss(auth_data->bss);
1730 kfree(auth_data);
1731 sdata->u.mgd.auth_data = NULL;
1732}
1733
1734static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1735 struct ieee80211_mgmt *mgmt, size_t len)
1736{
1737 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1738 u8 *pos;
1739 struct ieee802_11_elems elems;
1740
1741 pos = mgmt->u.auth.variable;
1742 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1743 if (!elems.challenge)
1744 return;
1745 auth_data->expected_transaction = 4;
1746 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1747 elems.challenge - 2, elems.challenge_len + 2,
1748 auth_data->bss->bssid, auth_data->bss->bssid,
1749 auth_data->key, auth_data->key_len,
1750 auth_data->key_idx);
1751}
1752
1753static enum rx_mgmt_action __must_check
1754ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1755 struct ieee80211_mgmt *mgmt, size_t len)
1756{
1757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1758 u8 bssid[ETH_ALEN];
1759 u16 auth_alg, auth_transaction, status_code;
1760 struct sta_info *sta;
1761
1762 lockdep_assert_held(&ifmgd->mtx);
1763
1764 if (len < 24 + 6)
1765 return RX_MGMT_NONE;
1766
1767 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1768 return RX_MGMT_NONE;
1769
1770 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1771
b203ca39 1772 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1773 return RX_MGMT_NONE;
1774
1775 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1776 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1777 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1778
1779 if (auth_alg != ifmgd->auth_data->algorithm ||
1780 auth_transaction != ifmgd->auth_data->expected_transaction)
1781 return RX_MGMT_NONE;
1782
1783 if (status_code != WLAN_STATUS_SUCCESS) {
f0d23208
JP		 1784 pr_debug("%s: %pM denied authentication (status %d)\n",
1785 sdata->name, mgmt->sa, status_code);
dac211ec
EP		 1786 ieee80211_destroy_auth_data(sdata, false);
1787 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1788 }
1789
1790 switch (ifmgd->auth_data->algorithm) {
1791 case WLAN_AUTH_OPEN:
1792 case WLAN_AUTH_LEAP:
1793 case WLAN_AUTH_FT:
1794 break;
1795 case WLAN_AUTH_SHARED_KEY:
1796 if (ifmgd->auth_data->expected_transaction != 4) {
1797 ieee80211_auth_challenge(sdata, mgmt, len);
1798 /* need another frame */
1799 return RX_MGMT_NONE;
1800 }
1801 break;
1802 default:
1803 WARN_ONCE(1, "invalid auth alg %d",
1804 ifmgd->auth_data->algorithm);
1805 return RX_MGMT_NONE;
1806 }
1807
f0d23208 1808 pr_debug("%s: authenticated\n", sdata->name);
66e67e41
JB		 1809 ifmgd->auth_data->done = true;
1810 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1811 run_again(ifmgd, ifmgd->auth_data->timeout);
1812
1813 /* move station state to auth */
1814 mutex_lock(&sdata->local->sta_mtx);
1815 sta = sta_info_get(sdata, bssid);
1816 if (!sta) {
1817 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1818 goto out_err;
1819 }
1820 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
f0d23208 1821 pr_debug("%s: failed moving %pM to auth\n", sdata->name, bssid);
66e67e41
JB		 1822 goto out_err;
1823 }
1824 mutex_unlock(&sdata->local->sta_mtx);
1825
1826 return RX_MGMT_CFG80211_RX_AUTH;
1827 out_err:
1828 mutex_unlock(&sdata->local->sta_mtx);
1829 /* ignore frame -- wait for timeout */
1830 return RX_MGMT_NONE;
1831}
1832
1833
77fdaa12
JB		 1834static enum rx_mgmt_action __must_check
1835ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1836 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1837{
46900298 1838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1839 const u8 *bssid = NULL;
f0706e82
JB		 1840 u16 reason_code;
1841
66e67e41
JB		 1842 lockdep_assert_held(&ifmgd->mtx);
1843
f4ea83dd 1844 if (len < 24 + 2)
77fdaa12 1845 return RX_MGMT_NONE;
f0706e82 1846
66e67e41 1847 if (!ifmgd->associated ||
b203ca39 1848 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1849 return RX_MGMT_NONE;
77fdaa12 1850
0c1ad2ca 1851 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1852
1853 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1854
f0d23208
JP		 1855 pr_debug("%s: deauthenticated from %pM (Reason: %u)\n",
1856 sdata->name, bssid, reason_code);
77fdaa12 1857
37ad3888
JB		 1858 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1859
7da7cc1d 1860 mutex_lock(&sdata->local->mtx);
63f170e0 1861 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1862 mutex_unlock(&sdata->local->mtx);
f0706e82 1863
77fdaa12 1864 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1865}
1866
1867
77fdaa12
JB		 1868static enum rx_mgmt_action __must_check
1869ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1870 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1871{
46900298 1872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1873 u16 reason_code;
1874
66e67e41 1875 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1876
66e67e41 1877 if (len < 24 + 2)
77fdaa12
JB		 1878 return RX_MGMT_NONE;
1879
66e67e41 1880 if (!ifmgd->associated ||
b203ca39 1881 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1882 return RX_MGMT_NONE;
f0706e82
JB		 1883
1884 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1885
f0d23208
JP		 1886 pr_debug("%s: disassociated from %pM (Reason: %u)\n",
1887 sdata->name, mgmt->sa, reason_code);
f0706e82 1888
37ad3888
JB		 1889 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1890
7da7cc1d 1891 mutex_lock(&sdata->local->mtx);
bc83b681 1892 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1893 mutex_unlock(&sdata->local->mtx);
37ad3888 1894
77fdaa12 1895 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1896}
1897
c74d084f
CL		 1898static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1899 u8 *supp_rates, unsigned int supp_rates_len,
1900 u32 *rates, u32 *basic_rates,
1901 bool *have_higher_than_11mbit,
1902 int *min_rate, int *min_rate_index)
1903{
1904 int i, j;
1905
1906 for (i = 0; i < supp_rates_len; i++) {
1907 int rate = (supp_rates[i] & 0x7f) * 5;
1908 bool is_basic = !!(supp_rates[i] & 0x80);
1909
1910 if (rate > 110)
1911 *have_higher_than_11mbit = true;
1912
1913 /*
1914 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1915 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1916 *
1917 * Note: Even through the membership selector and the basic
1918 * rate flag share the same bit, they are not exactly
1919 * the same.
1920 */
1921 if (!!(supp_rates[i] & 0x80) &&
1922 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1923 continue;
1924
1925 for (j = 0; j < sband->n_bitrates; j++) {
1926 if (sband->bitrates[j].bitrate == rate) {
1927 *rates |= BIT(j);
1928 if (is_basic)
1929 *basic_rates |= BIT(j);
1930 if (rate < *min_rate) {
1931 *min_rate = rate;
1932 *min_rate_index = j;
1933 }
1934 break;
1935 }
1936 }
1937 }
1938}
f0706e82 1939
66e67e41
JB		 1940static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1941 bool assoc)
1942{
1943 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1944
1945 lockdep_assert_held(&sdata->u.mgd.mtx);
1946
66e67e41
JB		 1947 if (!assoc) {
1948 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1949
1950 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1951 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1952 }
1953
1954 kfree(assoc_data);
1955 sdata->u.mgd.assoc_data = NULL;
1956}
1957
1958static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1959 struct cfg80211_bss *cbss,
af6b6374 1960 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1961{
46900298 1962 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1963 struct ieee80211_local *local = sdata->local;
8318d78a 1964 struct ieee80211_supported_band *sband;
f0706e82 1965 struct sta_info *sta;
af6b6374 1966 u8 *pos;
af6b6374 1967 u16 capab_info, aid;
f0706e82 1968 struct ieee802_11_elems elems;
bda3933a 1969 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1970 u32 changed = 0;
c74d084f 1971 int err;
f0706e82 1972
af6b6374 1973 /* AssocResp and ReassocResp have identical structure */
f0706e82 1974
f0706e82 1975 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1976 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1977
1dd84aa2 1978 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
f0d23208
JP		 1979 pr_debug("%s: invalid AID value 0x%x; bits 15:14 not set\n",
1980 sdata->name, aid);
1dd84aa2
JB		 1981 aid &= ~(BIT(15) | BIT(14));
1982
05cb9108
JB		 1983 ifmgd->broken_ap = false;
1984
1985 if (aid == 0 || aid > IEEE80211_MAX_AID) {
f0d23208
JP		 1986 pr_debug("%s: invalid AID value %d (out of range), turn off PS\n",
1987 sdata->name, aid);
05cb9108
JB		 1988 aid = 0;
1989 ifmgd->broken_ap = true;
1990 }
1991
af6b6374
JB		 1992 pos = mgmt->u.assoc_resp.variable;
1993 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1994
f0706e82 1995 if (!elems.supp_rates) {
f0d23208
JP		 1996 pr_debug("%s: no SuppRates element in AssocResp\n",
1997 sdata->name);
af6b6374 1998 return false;
f0706e82
JB		 1999 }
2000
46900298 2001 ifmgd->aid = aid;
f0706e82 2002
2a33bee2
GE		 2003 mutex_lock(&sdata->local->sta_mtx);
2004 /*
2005 * station info was already allocated and inserted before
2006 * the association and should be available to us
2007 */
7852e361 2008 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2009 if (WARN_ON(!sta)) {
2010 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2011 return false;
77fdaa12 2012 }
05e5e883 2013
66e67e41 2014 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2015
ab1faead 2016 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2017 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2018 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2019
64f68e5d
JB		 2020 sta->supports_40mhz =
2021 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2022
4b7679a5 2023 rate_control_rate_init(sta);
f0706e82 2024
46900298 2025 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2026 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2027
ddf4ac53 2028 if (elems.wmm_param)
c2c98fde 2029 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2030
c8987876
JB		 2031 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2032 if (!err)
2033 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2034 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2035 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2036 if (err) {
f0d23208
JP		 2037 pr_debug("%s: failed to move station %pM to desired state\n",
2038 sdata->name, sta->sta.addr);
c8987876
JB		 2039 WARN_ON(__sta_info_destroy(sta));
2040 mutex_unlock(&sdata->local->sta_mtx);
2041 return false;
2042 }
2043
7852e361 2044 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2045
f2176d72
JO		 2046 /*
2047 * Always handle WMM once after association regardless
2048 * of the first value the AP uses. Setting -1 here has
2049 * that effect because the AP values is an unsigned
2050 * 4-bit value.
2051 */
2052 ifmgd->wmm_last_param_set = -1;
2053
ddf4ac53 2054 if (elems.wmm_param)
4ced3f74 2055 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2056 elems.wmm_param_len);
aa837e1d 2057 else
3abead59
JB		 2058 ieee80211_set_wmm_default(sdata, false);
2059 changed |= BSS_CHANGED_QOS;
f0706e82 2060
074d46d1 2061 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2062 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2063 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2064 cbss->bssid, false);
ae5eb026 2065
60f8b39c
JB		 2066 /* set AID and assoc capability,
2067 * ieee80211_set_associated() will tell the driver */
2068 bss_conf->aid = aid;
2069 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2070 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2071
d524215f
FF		 2072 /*
2073 * If we're using 4-addr mode, let the AP know that we're
2074 * doing so, so that it can create the STA VLAN on its side
2075 */
2076 if (ifmgd->use_4addr)
2077 ieee80211_send_4addr_nullfunc(local, sdata);
2078
15b7b062 2079 /*
b291ba11
JB		 2080 * Start timer to probe the connection to the AP now.
2081 * Also start the timer that will detect beacon loss.
15b7b062 2082 */
b291ba11 2083 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2084 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2085
af6b6374 2086 return true;
f0706e82
JB		 2087}
2088
66e67e41
JB		 2089static enum rx_mgmt_action __must_check
2090ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2091 struct ieee80211_mgmt *mgmt, size_t len,
2092 struct cfg80211_bss **bss)
2093{
2094 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2095 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2096 u16 capab_info, status_code, aid;
2097 struct ieee802_11_elems elems;
2098 u8 *pos;
2099 bool reassoc;
2100
2101 lockdep_assert_held(&ifmgd->mtx);
2102
2103 if (!assoc_data)
2104 return RX_MGMT_NONE;
b203ca39 2105 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2106 return RX_MGMT_NONE;
2107
2108 /*
2109 * AssocResp and ReassocResp have identical structure, so process both
2110 * of them in this function.
2111 */
2112
2113 if (len < 24 + 6)
2114 return RX_MGMT_NONE;
2115
2116 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2117 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2118 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2119 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2120
f0d23208
JP		 2121 pr_debug("%s: RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2122 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2123 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2124
2125 pos = mgmt->u.assoc_resp.variable;
2126 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2127
2128 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2129 elems.timeout_int && elems.timeout_int_len == 5 &&
2130 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2131 u32 tu, ms;
2132 tu = get_unaligned_le32(elems.timeout_int + 1);
2133 ms = tu * 1024 / 1000;
f0d23208
JP		 2134 pr_debug("%s: %pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2135 sdata->name, mgmt->sa, tu, ms);
66e67e41
JB		 2136 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2137 if (ms > IEEE80211_ASSOC_TIMEOUT)
2138 run_again(ifmgd, assoc_data->timeout);
2139 return RX_MGMT_NONE;
2140 }
2141
2142 *bss = assoc_data->bss;
2143
2144 if (status_code != WLAN_STATUS_SUCCESS) {
f0d23208
JP		 2145 pr_debug("%s: %pM denied association (code=%d)\n",
2146 sdata->name, mgmt->sa, status_code);
66e67e41
JB		 2147 ieee80211_destroy_assoc_data(sdata, false);
2148 } else {
f0d23208 2149 pr_debug("%s: associated\n", sdata->name);
66e67e41 2150
66e67e41
JB		 2151 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2152 /* oops -- internal error -- send timeout for now */
79ebfb85 2153 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2154 sta_info_destroy_addr(sdata, mgmt->bssid);
2155 cfg80211_put_bss(*bss);
2156 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2157 }
79ebfb85
JB		 2158
2159 /*
2160 * destroy assoc_data afterwards, as otherwise an idle
2161 * recalc after assoc_data is NULL but before associated
2162 * is set can cause the interface to go idle
2163 */
2164 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2165 }
2166
2167 return RX_MGMT_CFG80211_RX_ASSOC;
2168}
98c8fccf
JB		 2169static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2170 struct ieee80211_mgmt *mgmt,
2171 size_t len,
2172 struct ieee80211_rx_status *rx_status,
2173 struct ieee802_11_elems *elems,
2174 bool beacon)
2175{
2176 struct ieee80211_local *local = sdata->local;
2177 int freq;
c2b13452 2178 struct ieee80211_bss *bss;
98c8fccf 2179 struct ieee80211_channel *channel;
56007a02
JB		 2180 bool need_ps = false;
2181
66e67e41 2182 if (sdata->u.mgd.associated &&
b203ca39 2183 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2184 bss = (void *)sdata->u.mgd.associated->priv;
2185 /* not previously set so we may need to recalc */
2186 need_ps = !bss->dtim_period;
2187 }
98c8fccf
JB		 2188
2189 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2190 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2191 rx_status->band);
98c8fccf
JB		 2192 else
2193 freq = rx_status->freq;
2194
2195 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2196
2197 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2198 return;
2199
98c8fccf 2200 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2201 channel, beacon);
77fdaa12
JB		 2202 if (bss)
2203 ieee80211_rx_bss_put(local, bss);
2204
2205 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2206 return;
2207
56007a02
JB		 2208 if (need_ps) {
2209 mutex_lock(&local->iflist_mtx);
2210 ieee80211_recalc_ps(local, -1);
2211 mutex_unlock(&local->iflist_mtx);
2212 }
2213
c481ec97 2214 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2215 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2216 ETH_ALEN) == 0)) {
c481ec97
S		 2217 struct ieee80211_channel_sw_ie *sw_elem =
2218 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2219 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2220 bss, rx_status->mactime);
c481ec97 2221 }
f0706e82
JB		 2222}
2223
2224
f698d856 2225static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2226 struct sk_buff *skb)
f0706e82 2227{
af6b6374 2228 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2229 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2230 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2231 size_t baselen, len = skb->len;
ae6a44e3
EK		 2232 struct ieee802_11_elems elems;
2233
15b7b062
KV		 2234 ifmgd = &sdata->u.mgd;
2235
77fdaa12
JB		 2236 ASSERT_MGD_MTX(ifmgd);
2237
b203ca39 2238 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2239 return; /* ignore ProbeResp to foreign address */
2240
ae6a44e3
EK		 2241 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2242 if (baselen > len)
2243 return;
2244
2245 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2246 &elems);
2247
98c8fccf 2248 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2249
77fdaa12 2250 if (ifmgd->associated &&
b203ca39 2251 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2252 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2253
2254 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2255 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2256 /* got probe response, continue with auth */
f0d23208 2257 pr_debug("%s: direct probe responded\n", sdata->name);
66e67e41
JB		 2258 ifmgd->auth_data->tries = 0;
2259 ifmgd->auth_data->timeout = jiffies;
2260 run_again(ifmgd, ifmgd->auth_data->timeout);
2261 }
f0706e82
JB		 2262}
2263
d91f36db
JB		 2264/*
2265 * This is the canonical list of information elements we care about,
2266 * the filter code also gives us all changes to the Microsoft OUI
2267 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2268 *
2269 * We implement beacon filtering in software since that means we can
2270 * avoid processing the frame here and in cfg80211, and userspace
2271 * will not be able to tell whether the hardware supports it or not.
2272 *
2273 * XXX: This list needs to be dynamic -- userspace needs to be able to
2274 * add items it requires. It also needs to be able to tell us to
2275 * look out for other vendor IEs.
2276 */
2277static const u64 care_about_ies =
1d4df3a5
JB		 2278 (1ULL << WLAN_EID_COUNTRY) |
2279 (1ULL << WLAN_EID_ERP_INFO) |
2280 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2281 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2282 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2283 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2284
f698d856 2285static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2286 struct ieee80211_mgmt *mgmt,
2287 size_t len,
2288 struct ieee80211_rx_status *rx_status)
2289{
d91f36db 2290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2291 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2292 size_t baselen;
2293 struct ieee802_11_elems elems;
f698d856 2294 struct ieee80211_local *local = sdata->local;
471b3efd 2295 u32 changed = 0;
d91f36db 2296 bool erp_valid, directed_tim = false;
7a5158ef 2297 u8 erp_value = 0;
d91f36db 2298 u32 ncrc;
77fdaa12
JB		 2299 u8 *bssid;
2300
66e67e41 2301 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2302
ae6a44e3
EK		 2303 /* Process beacon from the current BSS */
2304 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2305 if (baselen > len)
2306 return;
2307
d91f36db 2308 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2309 return;
f0706e82 2310
66e67e41 2311 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2312 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2313 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2314 len - baselen, &elems);
77fdaa12 2315
66e67e41
JB		 2316 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2317 false);
2318 ifmgd->assoc_data->have_beacon = true;
2319 ifmgd->assoc_data->sent_assoc = false;
2320 /* continue assoc process */
2321 ifmgd->assoc_data->timeout = jiffies;
2322 run_again(ifmgd, ifmgd->assoc_data->timeout);
2323 return;
2324 }
77fdaa12 2325
66e67e41 2326 if (!ifmgd->associated ||
b203ca39 2327 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2328 return;
66e67e41 2329 bssid = ifmgd->associated->bssid;
f0706e82 2330
17e4ec14
JM		 2331 /* Track average RSSI from the Beacon frames of the current AP */
2332 ifmgd->last_beacon_signal = rx_status->signal;
2333 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2334 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2335 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2336 ifmgd->last_cqm_event_signal = 0;
391a200a 2337 ifmgd->count_beacon_signal = 1;
615f7b9b 2338 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2339 } else {
2340 ifmgd->ave_beacon_signal =
2341 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2342 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2343 ifmgd->ave_beacon_signal) / 16;
391a200a 2344 ifmgd->count_beacon_signal++;
17e4ec14 2345 }
615f7b9b
MV		 2346
2347 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2348 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2349 int sig = ifmgd->ave_beacon_signal;
2350 int last_sig = ifmgd->last_ave_beacon_signal;
2351
2352 /*
2353 * if signal crosses either of the boundaries, invoke callback
2354 * with appropriate parameters
2355 */
2356 if (sig > ifmgd->rssi_max_thold &&
2357 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2358 ifmgd->last_ave_beacon_signal = sig;
2359 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2360 } else if (sig < ifmgd->rssi_min_thold &&
2361 (last_sig >= ifmgd->rssi_max_thold ||
2362 last_sig == 0)) {
2363 ifmgd->last_ave_beacon_signal = sig;
2364 drv_rssi_callback(local, RSSI_EVENT_LOW);
2365 }
2366 }
2367
17e4ec14 2368 if (bss_conf->cqm_rssi_thold &&
391a200a 2369 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2370 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2371 int sig = ifmgd->ave_beacon_signal / 16;
2372 int last_event = ifmgd->last_cqm_event_signal;
2373 int thold = bss_conf->cqm_rssi_thold;
2374 int hyst = bss_conf->cqm_rssi_hyst;
2375 if (sig < thold &&
2376 (last_event == 0 || sig < last_event - hyst)) {
2377 ifmgd->last_cqm_event_signal = sig;
2378 ieee80211_cqm_rssi_notify(
2379 &sdata->vif,
2380 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2381 GFP_KERNEL);
2382 } else if (sig > thold &&
2383 (last_event == 0 || sig > last_event + hyst)) {
2384 ifmgd->last_cqm_event_signal = sig;
2385 ieee80211_cqm_rssi_notify(
2386 &sdata->vif,
2387 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2388 GFP_KERNEL);
2389 }
2390 }
2391
b291ba11 2392 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180 2393#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 2394 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2395 sdata->name);
92778180 2396#endif
b291ba11 2397 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2398 mutex_lock(&local->iflist_mtx);
2399 ieee80211_recalc_ps(local, -1);
2400 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2401 }
2402
b291ba11
JB		 2403 /*
2404 * Push the beacon loss detection into the future since
2405 * we are processing a beacon from the AP just now.
2406 */
d3a910a8 2407 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2408
d91f36db
JB		 2409 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2410 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2411 len - baselen, &elems,
2412 care_about_ies, ncrc);
2413
2414 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2415 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2416 ifmgd->aid);
d91f36db 2417
d8ec4433 2418 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2419 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2420 true);
d91f36db 2421
4ced3f74 2422 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2423 elems.wmm_param_len);
2424 }
fe3fa827 2425
25c9c875 2426 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2427 if (directed_tim) {
572e0012 2428 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2429 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2430 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2431 ieee80211_hw_config(local,
2432 IEEE80211_CONF_CHANGE_PS);
2433 }
572e0012 2434 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2435 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2436 local->pspolling = true;
2437
2438 /*
2439 * Here is assumed that the driver will be
2440 * able to send ps-poll frame and receive a
2441 * response even though power save mode is
2442 * enabled, but some drivers might require
2443 * to disable power save here. This needs
2444 * to be investigated.
2445 */
2446 ieee80211_send_pspoll(local, sdata);
2447 }
a97b77b9
VN		 2448 }
2449 }
7a5158ef 2450
d8ec4433 2451 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2452 return;
2453 ifmgd->beacon_crc = ncrc;
d8ec4433 2454 ifmgd->beacon_crc_valid = true;
30196673 2455
7a5158ef
JB		 2456 if (elems.erp_info && elems.erp_info_len >= 1) {
2457 erp_valid = true;
2458 erp_value = elems.erp_info[0];
2459 } else {
2460 erp_valid = false;
50c4afb9 2461 }
7a5158ef
JB		 2462 changed |= ieee80211_handle_bss_capability(sdata,
2463 le16_to_cpu(mgmt->u.beacon.capab_info),
2464 erp_valid, erp_value);
f0706e82 2465
d3c990fb 2466
074d46d1 2467 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2468 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2469 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2470
2471 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2472
24398e39
JB		 2473 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2474 bssid, true);
d3c990fb
RR		 2475 }
2476
8b19e6ca 2477 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2478 if (elems.country_elem) {
a8302de9
VT		 2479 /* TODO: IBSS also needs this */
2480 if (elems.pwr_constr_elem)
2481 ieee80211_handle_pwr_constr(sdata,
2482 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2483 elems.pwr_constr_elem,
2484 elems.pwr_constr_elem_len);
3f2355cb
LR		 2485 }
2486
471b3efd 2487 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2488}
2489
1fa57d01
JB		 2490void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2491 struct sk_buff *skb)
f0706e82 2492{
77fdaa12 2493 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2494 struct ieee80211_rx_status *rx_status;
f0706e82 2495 struct ieee80211_mgmt *mgmt;
66e67e41 2496 struct cfg80211_bss *bss = NULL;
77fdaa12 2497 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2498 u16 fc;
2499
f0706e82
JB		 2500 rx_status = (struct ieee80211_rx_status *) skb->cb;
2501 mgmt = (struct ieee80211_mgmt *) skb->data;
2502 fc = le16_to_cpu(mgmt->frame_control);
2503
77fdaa12
JB		 2504 mutex_lock(&ifmgd->mtx);
2505
66e67e41
JB		 2506 switch (fc & IEEE80211_FCTL_STYPE) {
2507 case IEEE80211_STYPE_BEACON:
2508 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2509 break;
2510 case IEEE80211_STYPE_PROBE_RESP:
2511 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2512 break;
2513 case IEEE80211_STYPE_AUTH:
2514 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2515 break;
2516 case IEEE80211_STYPE_DEAUTH:
2517 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2518 break;
2519 case IEEE80211_STYPE_DISASSOC:
2520 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2521 break;
2522 case IEEE80211_STYPE_ASSOC_RESP:
2523 case IEEE80211_STYPE_REASSOC_RESP:
2524 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2525 break;
2526 case IEEE80211_STYPE_ACTION:
2527 switch (mgmt->u.action.category) {
2528 case WLAN_CATEGORY_SPECTRUM_MGMT:
2529 ieee80211_sta_process_chanswitch(sdata,
2530 &mgmt->u.action.u.chan_switch.sw_elem,
2531 (void *)ifmgd->associated->priv,
2532 rx_status->mactime);
77fdaa12 2533 break;
77fdaa12 2534 }
77fdaa12 2535 }
77fdaa12
JB		 2536 mutex_unlock(&ifmgd->mtx);
2537
66e67e41
JB		 2538 switch (rma) {
2539 case RX_MGMT_NONE:
2540 /* no action */
2541 break;
2542 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2543 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2544 break;
2545 case RX_MGMT_CFG80211_DISASSOC:
2546 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2547 break;
2548 case RX_MGMT_CFG80211_RX_AUTH:
2549 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2550 break;
2551 case RX_MGMT_CFG80211_RX_ASSOC:
2552 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2553 break;
2554 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2555 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2556 break;
2557 default:
2558 WARN(1, "unexpected: %d", rma);
b054b747 2559 }
f0706e82
JB		 2560}
2561
9c6bd790 2562static void ieee80211_sta_timer(unsigned long data)
f0706e82 2563{
60f8b39c
JB		 2564 struct ieee80211_sub_if_data *sdata =
2565 (struct ieee80211_sub_if_data *) data;
46900298 2566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2567 struct ieee80211_local *local = sdata->local;
f0706e82 2568
5bb644a0
JB		 2569 if (local->quiescing) {
2570 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2571 return;
2572 }
2573
64592c8f 2574 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2575}
2576
04ac3c0e 2577static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2578 u8 *bssid, u8 reason)
04ac3c0e
FF		 2579{
2580 struct ieee80211_local *local = sdata->local;
2581 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2582 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2583
2584 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2585 IEEE80211_STA_BEACON_POLL);
2586
37ad3888
JB		 2587 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2588 false, frame_buf);
04ac3c0e 2589 mutex_unlock(&ifmgd->mtx);
37ad3888 2590
04ac3c0e
FF		 2591 /*
2592 * must be outside lock due to cfg80211,
2593 * but that's not a problem.
2594 */
5fef7dbc 2595 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2596
2597 mutex_lock(&local->mtx);
2598 ieee80211_recalc_idle(local);
2599 mutex_unlock(&local->mtx);
2600
04ac3c0e
FF		 2601 mutex_lock(&ifmgd->mtx);
2602}
2603
66e67e41
JB		 2604static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2605{
2606 struct ieee80211_local *local = sdata->local;
2607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2608 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2609
2610 lockdep_assert_held(&ifmgd->mtx);
2611
2612 if (WARN_ON_ONCE(!auth_data))
2613 return -EINVAL;
2614
66e67e41
JB		 2615 auth_data->tries++;
2616
2617 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
f0d23208
JP		 2618 pr_debug("%s: authentication with %pM timed out\n",
2619 sdata->name, auth_data->bss->bssid);
66e67e41
JB		 2620
2621 /*
2622 * Most likely AP is not in the range so remove the
2623 * bss struct for that AP.
2624 */
2625 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2626
2627 return -ETIMEDOUT;
2628 }
2629
2630 if (auth_data->bss->proberesp_ies) {
f0d23208
JP		 2631 pr_debug("%s: send auth to %pM (try %d/%d)\n",
2632 sdata->name, auth_data->bss->bssid, auth_data->tries,
2633 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2634
2635 auth_data->expected_transaction = 2;
2636 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2637 auth_data->ie, auth_data->ie_len,
2638 auth_data->bss->bssid,
2639 auth_data->bss->bssid, NULL, 0, 0);
2640 } else {
2641 const u8 *ssidie;
2642
f0d23208
JP		 2643 pr_debug("%s: direct probe to %pM (try %d/%i)\n",
2644 sdata->name, auth_data->bss->bssid, auth_data->tries,
2645 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2646
2647 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2648 if (!ssidie)
2649 return -EINVAL;
2650 /*
2651 * Direct probe is sent to broadcast address as some APs
2652 * will not answer to direct packet in unassociated state.
2653 */
2654 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2655 NULL, 0, (u32) -1, true, false);
2656 }
2657
2658 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2659 run_again(ifmgd, auth_data->timeout);
2660
2661 return 0;
2662}
2663
2664static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2665{
2666 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2667 struct ieee80211_local *local = sdata->local;
2668
2669 lockdep_assert_held(&sdata->u.mgd.mtx);
2670
66e67e41
JB		 2671 assoc_data->tries++;
2672 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
f0d23208
JP		 2673 pr_debug("%s: association with %pM timed out\n",
2674 sdata->name, assoc_data->bss->bssid);
66e67e41
JB		 2675
2676 /*
2677 * Most likely AP is not in the range so remove the
2678 * bss struct for that AP.
2679 */
2680 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2681
2682 return -ETIMEDOUT;
2683 }
2684
f0d23208
JP		 2685 pr_debug("%s: associate with %pM (try %d/%d)\n",
2686 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2687 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2688 ieee80211_send_assoc(sdata);
2689
2690 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2691 run_again(&sdata->u.mgd, assoc_data->timeout);
2692
2693 return 0;
2694}
2695
1fa57d01 2696void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2697{
9c6bd790 2698 struct ieee80211_local *local = sdata->local;
1fa57d01 2699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2700
77fdaa12
JB		 2701 mutex_lock(&ifmgd->mtx);
2702
66e67e41
JB		 2703 if (ifmgd->auth_data &&
2704 time_after(jiffies, ifmgd->auth_data->timeout)) {
2705 if (ifmgd->auth_data->done) {
2706 /*
2707 * ok ... we waited for assoc but userspace didn't,
2708 * so let's just kill the auth data
2709 */
2710 ieee80211_destroy_auth_data(sdata, false);
2711 } else if (ieee80211_probe_auth(sdata)) {
2712 u8 bssid[ETH_ALEN];
2713
2714 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2715
2716 ieee80211_destroy_auth_data(sdata, false);
2717
2718 mutex_unlock(&ifmgd->mtx);
2719 cfg80211_send_auth_timeout(sdata->dev, bssid);
2720 mutex_lock(&ifmgd->mtx);
2721 }
2722 } else if (ifmgd->auth_data)
2723 run_again(ifmgd, ifmgd->auth_data->timeout);
2724
2725 if (ifmgd->assoc_data &&
2726 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2727 if (!ifmgd->assoc_data->have_beacon ||
2728 ieee80211_do_assoc(sdata)) {
2729 u8 bssid[ETH_ALEN];
2730
2731 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2732
2733 ieee80211_destroy_assoc_data(sdata, false);
2734
2735 mutex_unlock(&ifmgd->mtx);
2736 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2737 mutex_lock(&ifmgd->mtx);
2738 }
2739 } else if (ifmgd->assoc_data)
2740 run_again(ifmgd, ifmgd->assoc_data->timeout);
2741
b291ba11
JB		 2742 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2743 IEEE80211_STA_CONNECTION_POLL) &&
2744 ifmgd->associated) {
a43abf29 2745 u8 bssid[ETH_ALEN];
72a8a3ed 2746 int max_tries;
a43abf29 2747
0c1ad2ca 2748 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2749
72a8a3ed 2750 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2751 max_tries = max_nullfunc_tries;
72a8a3ed 2752 else
180205bd 2753 max_tries = max_probe_tries;
72a8a3ed 2754
4e5ff376
FF		 2755 /* ACK received for nullfunc probing frame */
2756 if (!ifmgd->probe_send_count)
2757 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2758 else if (ifmgd->nullfunc_failed) {
2759 if (ifmgd->probe_send_count < max_tries) {
2760#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2761 wiphy_debug(local->hw.wiphy,
2762 "%s: No ack for nullfunc frame to"
bfc31df3 2763 " AP %pM, try %d/%i\n",
04ac3c0e 2764 sdata->name, bssid,
bfc31df3 2765 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2766#endif
2767 ieee80211_mgd_probe_ap_send(sdata);
2768 } else {
2769#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2770 wiphy_debug(local->hw.wiphy,
2771 "%s: No ack for nullfunc frame to"
2772 " AP %pM, disconnecting.\n",
c658e5db 2773 sdata->name, bssid);
04ac3c0e 2774#endif
95acac61
JB		 2775 ieee80211_sta_connection_lost(sdata, bssid,
2776 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2777 }
2778 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2779 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2780 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2781#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2782 wiphy_debug(local->hw.wiphy,
2783 "%s: Failed to send nullfunc to AP %pM"
2784 " after %dms, disconnecting.\n",
2785 sdata->name,
180205bd 2786 bssid, probe_wait_ms);
04ac3c0e 2787#endif
95acac61
JB		 2788 ieee80211_sta_connection_lost(sdata, bssid,
2789 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2790 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2791#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2792 wiphy_debug(local->hw.wiphy,
2793 "%s: No probe response from AP %pM"
bfc31df3 2794 " after %dms, try %d/%i\n",
b38afa87 2795 sdata->name,
180205bd 2796 bssid, probe_wait_ms,
bfc31df3 2797 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2798#endif
2799 ieee80211_mgd_probe_ap_send(sdata);
2800 } else {
b291ba11
JB		 2801 /*
2802 * We actually lost the connection ... or did we?
2803 * Let's make sure!
2804 */
b38afa87
BG		 2805 wiphy_debug(local->hw.wiphy,
2806 "%s: No probe response from AP %pM"
2807 " after %dms, disconnecting.\n",
2808 sdata->name,
180205bd 2809 bssid, probe_wait_ms);
04ac3c0e 2810
95acac61
JB		 2811 ieee80211_sta_connection_lost(sdata, bssid,
2812 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2813 }
2814 }
2815
77fdaa12 2816 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2817
2818 mutex_lock(&local->mtx);
2819 ieee80211_recalc_idle(local);
2820 mutex_unlock(&local->mtx);
f0706e82
JB		 2821}
2822
b291ba11
JB		 2823static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2824{
2825 struct ieee80211_sub_if_data *sdata =
2826 (struct ieee80211_sub_if_data *) data;
2827 struct ieee80211_local *local = sdata->local;
2828
2829 if (local->quiescing)
2830 return;
2831
1e4dcd01
JO		 2832 ieee80211_queue_work(&sdata->local->hw,
2833 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2834}
2835
2836static void ieee80211_sta_conn_mon_timer(unsigned long data)
2837{
2838 struct ieee80211_sub_if_data *sdata =
2839 (struct ieee80211_sub_if_data *) data;
2840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2841 struct ieee80211_local *local = sdata->local;
2842
2843 if (local->quiescing)
2844 return;
2845
42935eca 2846 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2847}
2848
2849static void ieee80211_sta_monitor_work(struct work_struct *work)
2850{
2851 struct ieee80211_sub_if_data *sdata =
2852 container_of(work, struct ieee80211_sub_if_data,
2853 u.mgd.monitor_work);
2854
2855 ieee80211_mgd_probe_ap(sdata, false);
2856}
2857
9c6bd790
JB		 2858static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2859{
494f1fe5
EP		 2860 u32 flags;
2861
ad935687 2862 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2863 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2864 IEEE80211_STA_CONNECTION_POLL);
ad935687 2865
b291ba11 2866 /* let's probe the connection once */
494f1fe5
EP		 2867 flags = sdata->local->hw.flags;
2868 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2869 ieee80211_queue_work(&sdata->local->hw,
2870 &sdata->u.mgd.monitor_work);
b291ba11 2871 /* and do all the other regular work too */
64592c8f 2872 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2873 }
9c6bd790 2874}
f0706e82 2875
5bb644a0
JB		 2876#ifdef CONFIG_PM
2877void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2878{
2879 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2880
2881 /*
2882 * we need to use atomic bitops for the running bits
2883 * only because both timers might fire at the same
2884 * time -- the code here is properly synchronised.
2885 */
2886
d1f5b7a3
JB		 2887 cancel_work_sync(&ifmgd->request_smps_work);
2888
0ecfe806 2889 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2890 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2891 if (del_timer_sync(&ifmgd->timer))
2892 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2893
2894 cancel_work_sync(&ifmgd->chswitch_work);
2895 if (del_timer_sync(&ifmgd->chswitch_timer))
2896 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2897
b291ba11
JB		 2898 /* these will just be re-established on connection */
2899 del_timer_sync(&ifmgd->conn_mon_timer);
2900 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2901}
2902
2903void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2904{
2905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2906
676b58c2
RM		 2907 if (!ifmgd->associated)
2908 return;
2909
95acac61
JB		 2910 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2911 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2912 mutex_lock(&ifmgd->mtx);
2913 if (ifmgd->associated) {
2914#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2915 wiphy_debug(sdata->local->hw.wiphy,
2916 "%s: driver requested disconnect after resume.\n",
2917 sdata->name);
2918#endif
2919 ieee80211_sta_connection_lost(sdata,
2920 ifmgd->associated->bssid,
2921 WLAN_REASON_UNSPECIFIED);
2922 mutex_unlock(&ifmgd->mtx);
2923 return;
2924 }
2925 mutex_unlock(&ifmgd->mtx);
2926 }
2927
5bb644a0
JB		 2928 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2929 add_timer(&ifmgd->timer);
2930 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2931 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2932 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2933 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2934}
2935#endif
2936
9c6bd790
JB		 2937/* interface setup */
2938void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2939{
46900298 2940 struct ieee80211_if_managed *ifmgd;
988c0f72 2941
46900298 2942 ifmgd = &sdata->u.mgd;
b291ba11 2943 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2944 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2945 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2946 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2947 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2948 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2949 (unsigned long) sdata);
b291ba11
JB		 2950 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2951 (unsigned long) sdata);
2952 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2953 (unsigned long) sdata);
46900298 2954 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2955 (unsigned long) sdata);
9c6bd790 2956
ab1faead 2957 ifmgd->flags = 0;
1478acb3 2958 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2959 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2960 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2961
77fdaa12 2962 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2963
2964 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2965 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2966 else
2967 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2968}
2969
77fdaa12
JB		 2970/* scan finished notification */
2971void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2972{
77fdaa12 2973 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2974
77fdaa12
JB		 2975 /* Restart STA timers */
2976 rcu_read_lock();
2977 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2978 ieee80211_restart_sta_timer(sdata);
2979 rcu_read_unlock();
2980}
60f8b39c 2981
77fdaa12
JB		 2982int ieee80211_max_network_latency(struct notifier_block *nb,
2983 unsigned long data, void *dummy)
2984{
2985 s32 latency_usec = (s32) data;
2986 struct ieee80211_local *local =
2987 container_of(nb, struct ieee80211_local,
2988 network_latency_notifier);
1fa6f4af 2989
77fdaa12
JB		 2990 mutex_lock(&local->iflist_mtx);
2991 ieee80211_recalc_ps(local, latency_usec);
2992 mutex_unlock(&local->iflist_mtx);
dfe67012 2993
77fdaa12 2994 return 0;
9c6bd790
JB		 2995}
2996
a1cf775d 2997static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 2998 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 2999{
3000 struct ieee80211_local *local = sdata->local;
3001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3002 struct ieee80211_bss *bss = (void *)cbss->priv;
a1cf775d
JB		 3003 struct sta_info *sta;
3004 bool have_sta = false;
3005 int err;
24398e39
JB		 3006 int ht_cfreq;
3007 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3008 const u8 *ht_oper_ie;
3009 const struct ieee80211_ht_operation *ht_oper = NULL;
3010 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3011
3012 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3013 return -EINVAL;
3014
3015 if (assoc) {
3016 rcu_read_lock();
5d6a1b06 3017 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3018 rcu_read_unlock();
3019 }
3020
3021 if (!have_sta) {
5d6a1b06 3022 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3023 if (!sta)
3024 return -ENOMEM;
3025 }
3026
3027 mutex_lock(&local->mtx);
3028 ieee80211_recalc_idle(sdata->local);
3029 mutex_unlock(&local->mtx);
3030
3031 /* switch to the right channel */
24398e39
JB		 3032 sband = local->hw.wiphy->bands[cbss->channel->band];
3033
3034 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3035
3036 if (sband->ht_cap.ht_supported) {
3037 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3038 cbss->information_elements,
3039 cbss->len_information_elements);
3040 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3041 ht_oper = (void *)(ht_oper_ie + 2);
3042 }
3043
3044 if (ht_oper) {
3045 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3046 cbss->channel->band);
3047 /* check that channel matches the right operating channel */
3048 if (cbss->channel->center_freq != ht_cfreq) {
3049 /*
3050 * It's possible that some APs are confused here;
3051 * Netgear WNDR3700 sometimes reports 4 higher than
3052 * the actual channel in association responses, but
3053 * since we look at probe response/beacon data here
3054 * it should be OK.
3055 */
f0d23208
JP		 3056 pr_debug("%s: Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3057 sdata->name, cbss->channel->center_freq,
3058 ht_cfreq, ht_oper->primary_chan,
3059 cbss->channel->band);
24398e39
JB		 3060 ht_oper = NULL;
3061 }
3062 }
3063
3064 if (ht_oper) {
3065 channel_type = NL80211_CHAN_HT20;
3066
3067 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3068 switch (ht_oper->ht_param &
3069 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3070 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3071 channel_type = NL80211_CHAN_HT40PLUS;
3072 break;
3073 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3074 channel_type = NL80211_CHAN_HT40MINUS;
3075 break;
3076 }
3077 }
3078 }
3079
3080 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3081 /* can only fail due to HT40+/- mismatch */
3082 channel_type = NL80211_CHAN_HT20;
f0d23208
JP		 3083 pr_debug("%s: disabling 40 MHz due to multi-vif mismatch\n",
3084 sdata->name);
24398e39
JB		 3085 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3086 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3087 channel_type));
3088 }
3089
5d6a1b06 3090 local->oper_channel = cbss->channel;
24398e39 3091 ieee80211_hw_config(local, 0);
a1cf775d
JB		 3092
3093 if (!have_sta) {
5d6a1b06
JB		 3094 u32 rates = 0, basic_rates = 0;
3095 bool have_higher_than_11mbit;
3096 int min_rate = INT_MAX, min_rate_index = -1;
3097
5d6a1b06
JB		 3098 ieee80211_get_rates(sband, bss->supp_rates,
3099 bss->supp_rates_len,
3100 &rates, &basic_rates,
3101 &have_higher_than_11mbit,
3102 &min_rate, &min_rate_index);
3103
3104 /*
3105 * This used to be a workaround for basic rates missing
3106 * in the association response frame. Now that we no
3107 * longer use the basic rates from there, it probably
3108 * doesn't happen any more, but keep the workaround so
3109 * in case some *other* APs are buggy in different ways
3110 * we can connect -- with a warning.
3111 */
3112 if (!basic_rates && min_rate_index >= 0) {
f0d23208
JP		 3113 pr_debug("%s: No basic rates, using min rate instead\n",
3114 sdata->name);
5d6a1b06
JB		 3115 basic_rates = BIT(min_rate_index);
3116 }
3117
3118 sta->sta.supp_rates[cbss->channel->band] = rates;
3119 sdata->vif.bss_conf.basic_rates = basic_rates;
3120
3121 /* cf. IEEE 802.11 9.2.12 */
3122 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3123 have_higher_than_11mbit)
3124 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3125 else
3126 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3127
3128 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3129
3130 /* tell driver about BSSID and basic rates */
3131 ieee80211_bss_info_change_notify(sdata,
3132 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3133
3134 if (assoc)
3135 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3136
3137 err = sta_info_insert(sta);
3138 sta = NULL;
3139 if (err) {
f0d23208
JP		 3140 pr_debug("%s: failed to insert STA entry for the AP (error %d)\n",
3141 sdata->name, err);
a1cf775d
JB		 3142 return err;
3143 }
3144 } else
b203ca39 3145 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3146
3147 return 0;
3148}
3149
77fdaa12
JB		 3150/* config hooks */
3151int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3152 struct cfg80211_auth_request *req)
9c6bd790 3153{
66e67e41
JB		 3154 struct ieee80211_local *local = sdata->local;
3155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3156 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3157 u16 auth_alg;
66e67e41
JB		 3158 int err;
3159
3160 /* prepare auth data structure */
9c6bd790 3161
77fdaa12
JB		 3162 switch (req->auth_type) {
3163 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3164 auth_alg = WLAN_AUTH_OPEN;
3165 break;
3166 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3167 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3168 return -EOPNOTSUPP;
77fdaa12
JB		 3169 auth_alg = WLAN_AUTH_SHARED_KEY;
3170 break;
3171 case NL80211_AUTHTYPE_FT:
3172 auth_alg = WLAN_AUTH_FT;
3173 break;
3174 case NL80211_AUTHTYPE_NETWORK_EAP:
3175 auth_alg = WLAN_AUTH_LEAP;
3176 break;
3177 default:
3178 return -EOPNOTSUPP;
60f8b39c 3179 }
77fdaa12 3180
66e67e41
JB		 3181 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3182 if (!auth_data)
9c6bd790 3183 return -ENOMEM;
77fdaa12 3184
66e67e41 3185 auth_data->bss = req->bss;
77fdaa12
JB		 3186
3187 if (req->ie && req->ie_len) {
66e67e41
JB		 3188 memcpy(auth_data->ie, req->ie, req->ie_len);
3189 auth_data->ie_len = req->ie_len;
9c6bd790 3190 }
77fdaa12 3191
fffd0934 3192 if (req->key && req->key_len) {
66e67e41
JB		 3193 auth_data->key_len = req->key_len;
3194 auth_data->key_idx = req->key_idx;
3195 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3196 }
3197
66e67e41 3198 auth_data->algorithm = auth_alg;
60f8b39c 3199
66e67e41 3200 /* try to authenticate/probe */
2a33bee2 3201
66e67e41 3202 mutex_lock(&ifmgd->mtx);
2a33bee2 3203
66e67e41
JB		 3204 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3205 ifmgd->assoc_data) {
3206 err = -EBUSY;
3207 goto err_free;
2a33bee2
GE		 3208 }
3209
66e67e41
JB		 3210 if (ifmgd->auth_data)
3211 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3212
66e67e41
JB		 3213 /* prep auth_data so we don't go into idle on disassoc */
3214 ifmgd->auth_data = auth_data;
af6b6374 3215
66e67e41 3216 if (ifmgd->associated)
37ad3888 3217 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3218
f0d23208 3219 pr_debug("%s: authenticate with %pM\n", sdata->name, req->bss->bssid);
e5b900d2 3220
a1cf775d
JB		 3221 err = ieee80211_prep_connection(sdata, req->bss, false);
3222 if (err)
66e67e41 3223 goto err_clear;
af6b6374 3224
66e67e41
JB		 3225 err = ieee80211_probe_auth(sdata);
3226 if (err) {
66e67e41
JB		 3227 sta_info_destroy_addr(sdata, req->bss->bssid);
3228 goto err_clear;
3229 }
3230
3231 /* hold our own reference */
3232 cfg80211_ref_bss(auth_data->bss);
3233 err = 0;
3234 goto out_unlock;
3235
3236 err_clear:
3237 ifmgd->auth_data = NULL;
3238 err_free:
3239 kfree(auth_data);
3240 out_unlock:
3241 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3242
66e67e41 3243 return err;
af6b6374
JB		 3244}
3245
77fdaa12
JB		 3246int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3247 struct cfg80211_assoc_request *req)
f0706e82 3248{
66e67e41 3249 struct ieee80211_local *local = sdata->local;
77fdaa12 3250 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3251 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3252 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3253 struct ieee80211_supported_band *sband;
9dde6423 3254 const u8 *ssidie, *ht_ie;
2a33bee2 3255 int i, err;
f0706e82 3256
66e67e41
JB		 3257 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3258 if (!ssidie)
3259 return -EINVAL;
3260
3261 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3262 if (!assoc_data)
3263 return -ENOMEM;
3264
77fdaa12 3265 mutex_lock(&ifmgd->mtx);
9c87ba67 3266
66e67e41 3267 if (ifmgd->associated)
37ad3888 3268 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3269
3270 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3271 err = -EBUSY;
3272 goto err_free;
af6b6374 3273 }
77fdaa12 3274
66e67e41
JB		 3275 if (ifmgd->assoc_data) {
3276 err = -EBUSY;
3277 goto err_free;
3278 }
77fdaa12 3279
66e67e41
JB		 3280 if (ifmgd->auth_data) {
3281 bool match;
3282
3283 /* keep sta info, bssid if matching */
b203ca39 3284 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3285 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3286 }
3287
66e67e41
JB		 3288 /* prepare assoc data */
3289
77fdaa12 3290 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3291 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3292
d8ec4433
JO		 3293 ifmgd->beacon_crc_valid = false;
3294
de5036aa
JB		 3295 /*
3296 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3297 * We still associate in non-HT mode (11a/b/g) if any one of these
3298 * ciphers is configured as pairwise.
3299 * We can set this to true for non-11n hardware, that'll be checked
3300 * separately along with the peer capabilities.
3301 */
77fdaa12
JB		 3302 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3303 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3304 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3305 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3306 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3307
ef96a842
BG		 3308 if (req->flags & ASSOC_REQ_DISABLE_HT)
3309 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3310
4e74bfdb
JB		 3311 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3312 sband = local->hw.wiphy->bands[req->bss->channel->band];
3313 if (!sband->ht_cap.ht_supported ||
32c5057b 3314 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
4e74bfdb
JB		 3315 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3316
ef96a842
BG		 3317 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3318 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3319 sizeof(ifmgd->ht_capa_mask));
3320
77fdaa12 3321 if (req->ie && req->ie_len) {
66e67e41
JB		 3322 memcpy(assoc_data->ie, req->ie, req->ie_len);
3323 assoc_data->ie_len = req->ie_len;
3324 }
f679f65d 3325
66e67e41 3326 assoc_data->bss = req->bss;
f679f65d 3327
af6b6374
JB		 3328 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3329 if (ifmgd->powersave)
3330 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3331 else
3332 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3333 } else
3334 ifmgd->ap_smps = ifmgd->req_smps;
3335
66e67e41 3336 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3337 assoc_data->wmm = bss->wmm_used &&
3338 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3339 assoc_data->supp_rates = bss->supp_rates;
3340 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3341
3342 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3343 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3344 assoc_data->ap_ht_param =
3345 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3346 else
3347 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3348
ab13315a
KV		 3349 if (bss->wmm_used && bss->uapsd_supported &&
3350 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3351 assoc_data->uapsd = true;
ab13315a
KV		 3352 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3353 } else {
76f0303d 3354 assoc_data->uapsd = false;
ab13315a
KV		 3355 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3356 }
3357
66e67e41
JB		 3358 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3359 assoc_data->ssid_len = ssidie[1];
63f170e0 3360
77fdaa12 3361 if (req->prev_bssid)
66e67e41 3362 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3363
3364 if (req->use_mfp) {
3365 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3366 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3367 } else {
3368 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3369 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3370 }
3371
3372 if (req->crypto.control_port)
3373 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3374 else
3375 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3376
a621fa4d
JB		 3377 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3378 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3379
66e67e41
JB		 3380 /* kick off associate process */
3381
3382 ifmgd->assoc_data = assoc_data;
3383
a1cf775d
JB		 3384 err = ieee80211_prep_connection(sdata, req->bss, true);
3385 if (err)
3386 goto err_clear;
66e67e41
JB		 3387
3388 if (!bss->dtim_period &&
3389 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3390 /*
3391 * Wait up to one beacon interval ...
3392 * should this be more if we miss one?
3393 */
f0d23208
JP		 3394 pr_debug("%s: waiting for beacon from %pM\n",
3395 sdata->name, ifmgd->bssid);
3f9768a5 3396 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3397 } else {
3398 assoc_data->have_beacon = true;
3399 assoc_data->sent_assoc = false;
3400 assoc_data->timeout = jiffies;
3401 }
3402 run_again(ifmgd, assoc_data->timeout);
3403
fcff4f10
PS		 3404 if (bss->corrupt_data) {
3405 char *corrupt_type = "data";
3406 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3407 if (bss->corrupt_data &
3408 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3409 corrupt_type = "beacon and probe response";
3410 else
3411 corrupt_type = "beacon";
3412 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3413 corrupt_type = "probe response";
f0d23208
JP		 3414 pr_debug("%s: associating with AP with corrupt %s\n",
3415 sdata->name, corrupt_type);
fcff4f10
PS		 3416 }
3417
66e67e41
JB		 3418 err = 0;
3419 goto out;
3420 err_clear:
3421 ifmgd->assoc_data = NULL;
3422 err_free:
3423 kfree(assoc_data);
3424 out:
3425 mutex_unlock(&ifmgd->mtx);
3426
3427 return err;
f0706e82
JB		 3428}
3429
77fdaa12 3430int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3431 struct cfg80211_deauth_request *req)
f0706e82 3432{
46900298 3433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3434 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3435
77fdaa12
JB		 3436 mutex_lock(&ifmgd->mtx);
3437
37ad3888 3438 if (ifmgd->auth_data) {
66e67e41 3439 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3440 mutex_unlock(&ifmgd->mtx);
66e67e41 3441 return 0;
af6b6374 3442 }
77fdaa12 3443
f0d23208
JP		 3444 pr_debug("%s: deauthenticating from %pM by local choice (reason=%d)\n",
3445 sdata->name, req->bssid, req->reason_code);
0ff71613 3446
37ad3888 3447 if (ifmgd->associated &&
b203ca39 3448 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
37ad3888 3449 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3450 req->reason_code, true, frame_buf);
37ad3888
JB		 3451 else
3452 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3453 IEEE80211_STYPE_DEAUTH,
3454 req->reason_code, true,
3455 frame_buf);
3456 mutex_unlock(&ifmgd->mtx);
3457
5fef7dbc 3458 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3459
7da7cc1d 3460 mutex_lock(&sdata->local->mtx);
bc83b681 3461 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3462 mutex_unlock(&sdata->local->mtx);
bc83b681 3463
f0706e82
JB		 3464 return 0;
3465}
84363e6e 3466
77fdaa12 3467int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3468 struct cfg80211_disassoc_request *req)
9c6bd790 3469{
77fdaa12 3470 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3471 u8 bssid[ETH_ALEN];
5fef7dbc 3472 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3473
77fdaa12 3474 mutex_lock(&ifmgd->mtx);
10f644a4 3475
8d8b261a
JB		 3476 /*
3477 * cfg80211 should catch this ... but it's racy since
3478 * we can receive a disassoc frame, process it, hand it
3479 * to cfg80211 while that's in a locked section already
3480 * trying to tell us that the user wants to disconnect.
3481 */
0c1ad2ca 3482 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3483 mutex_unlock(&ifmgd->mtx);
3484 return -ENOLINK;
3485 }
3486
f0d23208
JP		 3487 pr_debug("%s: disassociating from %pM by local choice (reason=%d)\n",
3488 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3489
e69e95db 3490 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3491 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3492 req->reason_code, !req->local_state_change,
3493 frame_buf);
77fdaa12 3494 mutex_unlock(&ifmgd->mtx);
10f644a4 3495
5fef7dbc 3496 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3497
7da7cc1d 3498 mutex_lock(&sdata->local->mtx);
bc83b681 3499 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3500 mutex_unlock(&sdata->local->mtx);
bc83b681 3501
10f644a4
JB		 3502 return 0;
3503}
026331c4 3504
afa762f6 3505void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3506{
3507 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3508
3509 mutex_lock(&ifmgd->mtx);
3510 if (ifmgd->assoc_data)
3511 ieee80211_destroy_assoc_data(sdata, false);
3512 if (ifmgd->auth_data)
3513 ieee80211_destroy_auth_data(sdata, false);
3514 del_timer_sync(&ifmgd->timer);
3515 mutex_unlock(&ifmgd->mtx);
3516}
3517
a97c13c3
JO		 3518void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3519 enum nl80211_cqm_rssi_threshold_event rssi_event,
3520 gfp_t gfp)
3521{
3522 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3523
b5878a2d
JB		 3524 trace_api_cqm_rssi_notify(sdata, rssi_event);
3525
a97c13c3
JO		 3526 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3527}
3528EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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