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cfg80211: respect iface combinations when starting operation
[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
808118cb
JY		 905 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
906 IEEE80211_STA_CONNECTION_POLL))
907 return false;
908
909 rcu_read_lock();
910 sta = sta_info_get(sdata, mgd->bssid);
911 if (sta)
c2c98fde 912 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 913 rcu_read_unlock();
914
c2c98fde 915 return authorized;
808118cb
JY		 916}
917
965bedad 918/* need to hold RTNL or interface lock */
10f644a4 919void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 920{
921 struct ieee80211_sub_if_data *sdata, *found = NULL;
922 int count = 0;
195e294d 923 int timeout;
965bedad
JB		 924
925 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
926 local->ps_sdata = NULL;
927 return;
928 }
929
930 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 931 if (!ieee80211_sdata_running(sdata))
965bedad 932 continue;
8c7914de
RM		 933 if (sdata->vif.type == NL80211_IFTYPE_AP) {
934 /* If an AP vif is found, then disable PS
935 * by setting the count to zero thereby setting
936 * ps_sdata to NULL.
937 */
938 count = 0;
939 break;
940 }
965bedad
JB		 941 if (sdata->vif.type != NL80211_IFTYPE_STATION)
942 continue;
943 found = sdata;
944 count++;
945 }
946
808118cb 947 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 948 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 949 s32 beaconint_us;
950
951 if (latency < 0)
ed77134b 952 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 953
954 beaconint_us = ieee80211_tu_to_usec(
955 found->vif.bss_conf.beacon_int);
956
ff616381 957 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 958 if (timeout < 0) {
959 /*
ff616381
JO		 960 * Go to full PSM if the user configures a very low
961 * latency requirement.
0ab82b04
EP		 962 * The 2000 second value is there for compatibility
963 * until the PM_QOS_NETWORK_LATENCY is configured
964 * with real values.
195e294d 965 */
0ab82b04
EP		 966 if (latency > (1900 * USEC_PER_MSEC) &&
967 latency != (2000 * USEC_PER_SEC))
195e294d 968 timeout = 0;
ff616381
JO		 969 else
970 timeout = 100;
195e294d 971 }
f90754c1
JO		 972 local->dynamic_ps_user_timeout = timeout;
973 if (!local->disable_dynamic_ps)
974 conf->dynamic_ps_timeout =
975 local->dynamic_ps_user_timeout;
195e294d 976
04fe2037 977 if (beaconint_us > latency) {
10f644a4 978 local->ps_sdata = NULL;
04fe2037 979 } else {
56007a02 980 struct ieee80211_bss *bss;
04fe2037 981 int maxslp = 1;
56007a02 982 u8 dtimper;
04fe2037 983
56007a02
JB		 984 bss = (void *)found->u.mgd.associated->priv;
985 dtimper = bss->dtim_period;
986
987 /* If the TIM IE is invalid, pretend the value is 1 */
988 if (!dtimper)
989 dtimper = 1;
990 else if (dtimper > 1)
04fe2037
JB		 991 maxslp = min_t(int, dtimper,
992 latency / beaconint_us);
993
9ccebe61 994 local->hw.conf.max_sleep_period = maxslp;
56007a02 995 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 996 local->ps_sdata = found;
04fe2037 997 }
10f644a4 998 } else {
965bedad 999 local->ps_sdata = NULL;
10f644a4 1000 }
965bedad
JB		 1001
1002 ieee80211_change_ps(local);
1003}
1004
1005void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1006{
1007 struct ieee80211_local *local =
1008 container_of(work, struct ieee80211_local,
1009 dynamic_ps_disable_work);
1010
1011 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1012 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1013 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1014 }
1015
1016 ieee80211_wake_queues_by_reason(&local->hw,
1017 IEEE80211_QUEUE_STOP_REASON_PS);
1018}
1019
1020void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1021{
1022 struct ieee80211_local *local =
1023 container_of(work, struct ieee80211_local,
1024 dynamic_ps_enable_work);
1025 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1026 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1027 unsigned long flags;
1028 int q;
965bedad
JB		 1029
1030 /* can only happen when PS was just disabled anyway */
1031 if (!sdata)
1032 return;
1033
5e34069c
CL		 1034 ifmgd = &sdata->u.mgd;
1035
965bedad
JB		 1036 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1037 return;
1038
77b7023a
AN		 1039 if (!local->disable_dynamic_ps &&
1040 local->hw.conf.dynamic_ps_timeout > 0) {
1041 /* don't enter PS if TX frames are pending */
1042 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1043 mod_timer(&local->dynamic_ps_timer, jiffies +
1044 msecs_to_jiffies(
1045 local->hw.conf.dynamic_ps_timeout));
1046 return;
1047 }
77b7023a
AN		 1048
1049 /*
1050 * transmission can be stopped by others which leads to
1051 * dynamic_ps_timer expiry. Postpone the ps timer if it
1052 * is not the actual idle state.
1053 */
1054 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1055 for (q = 0; q < local->hw.queues; q++) {
1056 if (local->queue_stop_reasons[q]) {
1057 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1058 flags);
1059 mod_timer(&local->dynamic_ps_timer, jiffies +
1060 msecs_to_jiffies(
1061 local->hw.conf.dynamic_ps_timeout));
1062 return;
1063 }
1064 }
1065 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1066 }
1ddc2867 1067
375177bf 1068 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1069 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1070 netif_tx_stop_all_queues(sdata->dev);
965bedad 1071
e8306f98
VN		 1072 if (drv_tx_frames_pending(local))
1073 mod_timer(&local->dynamic_ps_timer, jiffies +
1074 msecs_to_jiffies(
1075 local->hw.conf.dynamic_ps_timeout));
1076 else {
1077 ieee80211_send_nullfunc(local, sdata, 1);
1078 /* Flush to get the tx status of nullfunc frame */
1079 drv_flush(local, false);
1080 }
f3e85b9e
VN		 1081 }
1082
2a13052f
JO		 1083 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1084 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1085 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1086 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1087 local->hw.conf.flags |= IEEE80211_CONF_PS;
1088 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1089 }
f3e85b9e 1090
77b7023a
AN		 1091 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1092 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1093}
1094
1095void ieee80211_dynamic_ps_timer(unsigned long data)
1096{
1097 struct ieee80211_local *local = (void *) data;
1098
78f1a8b7 1099 if (local->quiescing || local->suspended)
5bb644a0
JB		 1100 return;
1101
42935eca 1102 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1103}
1104
60f8b39c 1105/* MLME */
f698d856 1106static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1107 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1108 u8 *wmm_param, size_t wmm_param_len)
1109{
f0706e82 1110 struct ieee80211_tx_queue_params params;
4ced3f74 1111 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1112 size_t left;
1113 int count;
ab13315a 1114 u8 *pos, uapsd_queues = 0;
f0706e82 1115
e1b3ec1a
SG		 1116 if (!local->ops->conf_tx)
1117 return;
1118
32c5057b 1119 if (local->hw.queues < IEEE80211_NUM_ACS)
3434fbd3
JB		 1120 return;
1121
1122 if (!wmm_param)
1123 return;
1124
f0706e82
JB		 1125 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1126 return;
ab13315a
KV		 1127
1128 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1129 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1130
f0706e82 1131 count = wmm_param[6] & 0x0f;
46900298 1132 if (count == ifmgd->wmm_last_param_set)
f0706e82 1133 return;
46900298 1134 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1135
1136 pos = wmm_param + 8;
1137 left = wmm_param_len - 8;
1138
1139 memset(&params, 0, sizeof(params));
1140
00e96dec 1141 sdata->wmm_acm = 0;
f0706e82
JB		 1142 for (; left >= 4; left -= 4, pos += 4) {
1143 int aci = (pos[0] >> 5) & 0x03;
1144 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1145 bool uapsd = false;
f0706e82
JB		 1146 int queue;
1147
1148 switch (aci) {
0eeb59fe 1149 case 1: /* AC_BK */
e100bb64 1150 queue = 3;
988c0f72 1151 if (acm)
00e96dec 1152 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1153 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1154 uapsd = true;
f0706e82 1155 break;
0eeb59fe 1156 case 2: /* AC_VI */
e100bb64 1157 queue = 1;
988c0f72 1158 if (acm)
00e96dec 1159 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1160 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1161 uapsd = true;
f0706e82 1162 break;
0eeb59fe 1163 case 3: /* AC_VO */
e100bb64 1164 queue = 0;
988c0f72 1165 if (acm)
00e96dec 1166 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1167 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1168 uapsd = true;
f0706e82 1169 break;
0eeb59fe 1170 case 0: /* AC_BE */
f0706e82 1171 default:
e100bb64 1172 queue = 2;
988c0f72 1173 if (acm)
00e96dec 1174 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1175 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1176 uapsd = true;
f0706e82
JB		 1177 break;
1178 }
1179
1180 params.aifs = pos[0] & 0x0f;
1181 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1182 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1183 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1184 params.uapsd = uapsd;
1185
bdcbd8e0
JB		 1186 mlme_dbg(sdata,
1187 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1188 queue, aci, acm,
1189 params.aifs, params.cw_min, params.cw_max,
1190 params.txop, params.uapsd);
f6f3def3
EP		 1191 sdata->tx_conf[queue] = params;
1192 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1193 sdata_err(sdata,
1194 "failed to set TX queue parameters for queue %d\n",
1195 queue);
f0706e82 1196 }
e1b3ec1a
SG		 1197
1198 /* enable WMM or activate new settings */
4ced3f74 1199 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1200}
1201
925e64c3
SG		 1202static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1203{
1204 lockdep_assert_held(&sdata->local->mtx);
1205
1206 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1207 IEEE80211_STA_BEACON_POLL);
1208 ieee80211_run_deferred_scan(sdata->local);
1209}
1210
1211static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1212{
1213 mutex_lock(&sdata->local->mtx);
1214 __ieee80211_stop_poll(sdata);
1215 mutex_unlock(&sdata->local->mtx);
1216}
1217
7a5158ef
JB		 1218static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1219 u16 capab, bool erp_valid, u8 erp)
5628221c 1220{
bda3933a 1221 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1222 u32 changed = 0;
7a5158ef
JB		 1223 bool use_protection;
1224 bool use_short_preamble;
1225 bool use_short_slot;
1226
1227 if (erp_valid) {
1228 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1229 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1230 } else {
1231 use_protection = false;
1232 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1233 }
1234
1235 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1236 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1237 use_short_slot = true;
5628221c 1238
471b3efd 1239 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1240 bss_conf->use_cts_prot = use_protection;
1241 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1242 }
7e9ed188 1243
d43c7b37 1244 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1245 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1246 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1247 }
d9430a32 1248
7a5158ef 1249 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1250 bss_conf->use_short_slot = use_short_slot;
1251 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1252 }
1253
1254 return changed;
1255}
1256
f698d856 1257static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1258 struct cfg80211_bss *cbss,
ae5eb026 1259 u32 bss_info_changed)
f0706e82 1260{
0c1ad2ca 1261 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1262 struct ieee80211_local *local = sdata->local;
68542962 1263 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1264
ae5eb026 1265 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1266 /* set timing information */
68542962 1267 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1268 bss_conf->last_tsf = cbss->tsf;
5628221c 1269
77fdaa12
JB		 1270 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1271 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1272 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1273
7ccc8bd7
FF		 1274 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1275 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1276
0c1ad2ca
JB		 1277 sdata->u.mgd.associated = cbss;
1278 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1279
17e4ec14
JM		 1280 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1281
b291ba11 1282 /* just to be sure */
925e64c3 1283 ieee80211_stop_poll(sdata);
b291ba11 1284
9ac19a90 1285 ieee80211_led_assoc(local, 1);
9306102e 1286
e5b900d2
JB		 1287 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1288 bss_conf->dtim_period = bss->dtim_period;
1289 else
1290 bss_conf->dtim_period = 0;
1291
68542962 1292 bss_conf->assoc = 1;
9cef8737 1293
a97c13c3 1294 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1295 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1296 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1297 bss_info_changed |= BSS_CHANGED_CQM;
1298
68542962
JO		 1299 /* Enable ARP filtering */
1300 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1301 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1302 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1303 }
1304
ae5eb026 1305 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1306
056508dc
JB		 1307 mutex_lock(&local->iflist_mtx);
1308 ieee80211_recalc_ps(local, -1);
025e6be2 1309 ieee80211_recalc_smps(local);
056508dc 1310 mutex_unlock(&local->iflist_mtx);
e0cb686f 1311
8a5b33f5 1312 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1313 netif_carrier_on(sdata->dev);
f0706e82
JB		 1314}
1315
e69e95db 1316static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1317 u16 stype, u16 reason, bool tx,
1318 u8 *frame_buf)
aa458d17 1319{
46900298 1320 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1321 struct ieee80211_local *local = sdata->local;
1322 struct sta_info *sta;
3cc5240b 1323 u32 changed = 0;
b291ba11 1324 u8 bssid[ETH_ALEN];
aa458d17 1325
77fdaa12
JB		 1326 ASSERT_MGD_MTX(ifmgd);
1327
37ad3888
JB		 1328 if (WARN_ON_ONCE(tx && !frame_buf))
1329 return;
1330
b291ba11
JB		 1331 if (WARN_ON(!ifmgd->associated))
1332 return;
1333
79543d8e
DS		 1334 ieee80211_stop_poll(sdata);
1335
0c1ad2ca 1336 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1337
77fdaa12
JB		 1338 ifmgd->associated = NULL;
1339 memset(ifmgd->bssid, 0, ETH_ALEN);
1340
1341 /*
1342 * we need to commit the associated = NULL change because the
1343 * scan code uses that to determine whether this iface should
1344 * go to/wake up from powersave or not -- and could otherwise
1345 * wake the queues erroneously.
1346 */
1347 smp_mb();
1348
1349 /*
1350 * Thus, we can only afterwards stop the queues -- to account
1351 * for the case where another CPU is finishing a scan at this
1352 * time -- we don't want the scan code to enable queues.
1353 */
aa458d17 1354
8a5b33f5 1355 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1356 netif_carrier_off(sdata->dev);
1357
2a419056 1358 mutex_lock(&local->sta_mtx);
abe60632 1359 sta = sta_info_get(sdata, bssid);
4cad6c7c 1360 if (sta) {
c2c98fde 1361 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1362 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1363 }
2a419056 1364 mutex_unlock(&local->sta_mtx);
aa458d17 1365
f823981e
EP		 1366 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1367 if (tx)
1368 drv_flush(local, false);
1369
37ad3888
JB		 1370 /* deauthenticate/disassociate now */
1371 if (tx || frame_buf)
1372 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1373 tx, frame_buf);
1374
1375 /* flush out frame */
1376 if (tx)
1377 drv_flush(local, false);
1378
1379 /* remove AP and TDLS peers */
1380 sta_info_flush(local, sdata);
1381
1382 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1383 changed |= ieee80211_reset_erp_info(sdata);
1384
f5e5bf25 1385 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1386 changed |= BSS_CHANGED_ASSOC;
1387 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1388
413ad50a 1389 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1390 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1391 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1392
a8302de9
VT		 1393 local->power_constr_level = 0;
1394
520eb820
KV		 1395 del_timer_sync(&local->dynamic_ps_timer);
1396 cancel_work_sync(&local->dynamic_ps_enable_work);
1397
e0cb686f
KV		 1398 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1399 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1401 }
a331400b 1402 local->ps_sdata = NULL;
ae5eb026 1403
68542962
JO		 1404 /* Disable ARP filtering */
1405 if (sdata->vif.bss_conf.arp_filter_enabled) {
1406 sdata->vif.bss_conf.arp_filter_enabled = false;
1407 changed |= BSS_CHANGED_ARP_FILTER;
1408 }
1409
3abead59
JB		 1410 sdata->vif.bss_conf.qos = false;
1411 changed |= BSS_CHANGED_QOS;
1412
0aaffa9b
JB		 1413 /* The BSSID (not really interesting) and HT changed */
1414 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1415 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1416
3cc5240b
JB		 1417 /* channel(_type) changes are handled by ieee80211_hw_config */
1418 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1419 ieee80211_hw_config(local, 0);
1420
3abead59
JB		 1421 /* disassociated - set to defaults now */
1422 ieee80211_set_wmm_default(sdata, false);
1423
b9dcf712
JB		 1424 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1425 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1426 del_timer_sync(&sdata->u.mgd.timer);
1427 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1428}
f0706e82 1429
3cf335d5
KV		 1430void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1431 struct ieee80211_hdr *hdr)
1432{
1433 /*
1434 * We can postpone the mgd.timer whenever receiving unicast frames
1435 * from AP because we know that the connection is working both ways
1436 * at that time. But multicast frames (and hence also beacons) must
1437 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1438 * data idle periods for sending the periodic probe request to the
1439 * AP we're connected to.
3cf335d5 1440 */
b291ba11
JB		 1441 if (is_multicast_ether_addr(hdr->addr1))
1442 return;
1443
be099e82 1444 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1445}
f0706e82 1446
4e5ff376
FF		 1447static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1448{
1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1450 struct ieee80211_local *local = sdata->local;
4e5ff376 1451
133d40f9 1452 mutex_lock(&local->mtx);
4e5ff376 1453 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1454 IEEE80211_STA_CONNECTION_POLL))) {
1455 mutex_unlock(&local->mtx);
1456 return;
1457 }
4e5ff376 1458
925e64c3 1459 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1460
1461 mutex_lock(&local->iflist_mtx);
1462 ieee80211_recalc_ps(local, -1);
1463 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1464
1465 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1466 goto out;
4e5ff376
FF		 1467
1468 /*
1469 * We've received a probe response, but are not sure whether
1470 * we have or will be receiving any beacons or data, so let's
1471 * schedule the timers again, just in case.
1472 */
1473 ieee80211_sta_reset_beacon_monitor(sdata);
1474
1475 mod_timer(&ifmgd->conn_mon_timer,
1476 round_jiffies_up(jiffies +
1477 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1478out:
133d40f9 1479 mutex_unlock(&local->mtx);
4e5ff376
FF		 1480}
1481
1482void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1483 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1484{
75706d0e 1485 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1486 return;
1487
04ac3c0e
FF		 1488 if (ack)
1489 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1490
1491 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1492 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1493 if (ack)
1494 sdata->u.mgd.probe_send_count = 0;
1495 else
1496 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1497 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1498 }
1499}
1500
a43abf29
ML		 1501static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1502{
1503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1504 const u8 *ssid;
f01a067d 1505 u8 *dst = ifmgd->associated->bssid;
180205bd 1506 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1507
1508 /*
1509 * Try sending broadcast probe requests for the last three
1510 * probe requests after the first ones failed since some
1511 * buggy APs only support broadcast probe requests.
1512 */
1513 if (ifmgd->probe_send_count >= unicast_limit)
1514 dst = NULL;
a43abf29 1515
4e5ff376
FF		 1516 /*
1517 * When the hardware reports an accurate Tx ACK status, it's
1518 * better to send a nullfunc frame instead of a probe request,
1519 * as it will kick us off the AP quickly if we aren't associated
1520 * anymore. The timeout will be reset if the frame is ACKed by
1521 * the AP.
1522 */
992e68bf
SD		 1523 ifmgd->probe_send_count++;
1524
04ac3c0e
FF		 1525 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1526 ifmgd->nullfunc_failed = false;
4e5ff376 1527 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1528 } else {
88c868c4
SG		 1529 int ssid_len;
1530
4e5ff376 1531 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1532 if (WARN_ON_ONCE(ssid == NULL))
1533 ssid_len = 0;
1534 else
1535 ssid_len = ssid[1];
1536
1537 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1538 0, (u32) -1, true, false);
4e5ff376 1539 }
a43abf29 1540
180205bd 1541 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1542 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1543 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1544 drv_flush(sdata->local, false);
a43abf29
ML		 1545}
1546
b291ba11
JB		 1547static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1548 bool beacon)
04de8381 1549{
04de8381 1550 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1551 bool already = false;
34bfc411 1552
9607e6b6 1553 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1554 return;
1555
77fdaa12
JB		 1556 mutex_lock(&ifmgd->mtx);
1557
1558 if (!ifmgd->associated)
1559 goto out;
1560
133d40f9
SG		 1561 mutex_lock(&sdata->local->mtx);
1562
1563 if (sdata->local->tmp_channel || sdata->local->scanning) {
1564 mutex_unlock(&sdata->local->mtx);
1565 goto out;
1566 }
1567
e87cc472 1568 if (beacon)
bdcbd8e0
JB		 1569 mlme_dbg_ratelimited(sdata,
1570 "detected beacon loss from AP - sending probe request\n");
1571
6efb71b0
HS		 1572 ieee80211_cqm_rssi_notify(&sdata->vif,
1573 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1574
b291ba11
JB		 1575 /*
1576 * The driver/our work has already reported this event or the
1577 * connection monitoring has kicked in and we have already sent
1578 * a probe request. Or maybe the AP died and the driver keeps
1579 * reporting until we disassociate...
1580 *
1581 * In either case we have to ignore the current call to this
1582 * function (except for setting the correct probe reason bit)
1583 * because otherwise we would reset the timer every time and
1584 * never check whether we received a probe response!
1585 */
1586 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1587 IEEE80211_STA_CONNECTION_POLL))
1588 already = true;
1589
1590 if (beacon)
1591 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1592 else
1593 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1594
133d40f9
SG		 1595 mutex_unlock(&sdata->local->mtx);
1596
b291ba11
JB		 1597 if (already)
1598 goto out;
1599
4e751843
JB		 1600 mutex_lock(&sdata->local->iflist_mtx);
1601 ieee80211_recalc_ps(sdata->local, -1);
1602 mutex_unlock(&sdata->local->iflist_mtx);
1603
a43abf29
ML		 1604 ifmgd->probe_send_count = 0;
1605 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1606 out:
1607 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1608}
1609
a619a4c0
JO		 1610struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1611 struct ieee80211_vif *vif)
1612{
1613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1615 struct sk_buff *skb;
1616 const u8 *ssid;
88c868c4 1617 int ssid_len;
a619a4c0
JO		 1618
1619 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1620 return NULL;
1621
1622 ASSERT_MGD_MTX(ifmgd);
1623
1624 if (!ifmgd->associated)
1625 return NULL;
1626
1627 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1628 if (WARN_ON_ONCE(ssid == NULL))
1629 ssid_len = 0;
1630 else
1631 ssid_len = ssid[1];
1632
a619a4c0 1633 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
88c868c4 1634 (u32) -1, ssid + 2, ssid_len,
85a237fe 1635 NULL, 0, true);
a619a4c0
JO		 1636
1637 return skb;
1638}
1639EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1640
1e4dcd01
JO		 1641static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1642{
1643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1644 struct ieee80211_local *local = sdata->local;
1645 u8 bssid[ETH_ALEN];
5fef7dbc 1646 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1647
1648 mutex_lock(&ifmgd->mtx);
1649 if (!ifmgd->associated) {
1650 mutex_unlock(&ifmgd->mtx);
1651 return;
1652 }
1653
1654 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1655
bdcbd8e0 1656 sdata_info(sdata, "Connection to AP %pM lost\n", bssid);
1e4dcd01 1657
37ad3888
JB		 1658 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1659 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1660 false, frame_buf);
1e4dcd01 1661 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1662
1e4dcd01
JO		 1663 /*
1664 * must be outside lock due to cfg80211,
1665 * but that's not a problem.
1666 */
5fef7dbc 1667 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1668
1669 mutex_lock(&local->mtx);
1670 ieee80211_recalc_idle(local);
1671 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1672}
1673
1674void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1675{
1676 struct ieee80211_sub_if_data *sdata =
1677 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1678 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1680 struct sta_info *sta;
1681
1682 if (ifmgd->associated) {
30fa9047 1683 rcu_read_lock();
a85e1d55
PS		 1684 sta = sta_info_get(sdata, ifmgd->bssid);
1685 if (sta)
1686 sta->beacon_loss_count++;
30fa9047 1687 rcu_read_unlock();
a85e1d55 1688 }
b291ba11 1689
1e4dcd01
JO		 1690 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1691 __ieee80211_connection_loss(sdata);
1692 else
1693 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1694}
1695
04de8381
KV		 1696void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1697{
1698 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1699 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1700
b5878a2d
JB		 1701 trace_api_beacon_loss(sdata);
1702
1e4dcd01
JO		 1703 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1704 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1705}
1706EXPORT_SYMBOL(ieee80211_beacon_loss);
1707
1e4dcd01
JO		 1708void ieee80211_connection_loss(struct ieee80211_vif *vif)
1709{
1710 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1711 struct ieee80211_hw *hw = &sdata->local->hw;
1712
b5878a2d
JB		 1713 trace_api_connection_loss(sdata);
1714
1e4dcd01
JO		 1715 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1716 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1717}
1718EXPORT_SYMBOL(ieee80211_connection_loss);
1719
1720
66e67e41
JB		 1721static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1722 bool assoc)
1723{
1724 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1725
1726 lockdep_assert_held(&sdata->u.mgd.mtx);
1727
66e67e41
JB		 1728 if (!assoc) {
1729 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1730
1731 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1732 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1733 }
1734
1735 cfg80211_put_bss(auth_data->bss);
1736 kfree(auth_data);
1737 sdata->u.mgd.auth_data = NULL;
1738}
1739
1740static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1741 struct ieee80211_mgmt *mgmt, size_t len)
1742{
1743 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1744 u8 *pos;
1745 struct ieee802_11_elems elems;
1746
1747 pos = mgmt->u.auth.variable;
1748 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1749 if (!elems.challenge)
1750 return;
1751 auth_data->expected_transaction = 4;
1752 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1753 elems.challenge - 2, elems.challenge_len + 2,
1754 auth_data->bss->bssid, auth_data->bss->bssid,
1755 auth_data->key, auth_data->key_len,
1756 auth_data->key_idx);
1757}
1758
1759static enum rx_mgmt_action __must_check
1760ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1761 struct ieee80211_mgmt *mgmt, size_t len)
1762{
1763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1764 u8 bssid[ETH_ALEN];
1765 u16 auth_alg, auth_transaction, status_code;
1766 struct sta_info *sta;
1767
1768 lockdep_assert_held(&ifmgd->mtx);
1769
1770 if (len < 24 + 6)
1771 return RX_MGMT_NONE;
1772
1773 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1774 return RX_MGMT_NONE;
1775
1776 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1777
b203ca39 1778 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1779 return RX_MGMT_NONE;
1780
1781 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1782 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1783 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1784
1785 if (auth_alg != ifmgd->auth_data->algorithm ||
1786 auth_transaction != ifmgd->auth_data->expected_transaction)
1787 return RX_MGMT_NONE;
1788
1789 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1790 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1791 mgmt->sa, status_code);
dac211ec
EP		 1792 ieee80211_destroy_auth_data(sdata, false);
1793 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1794 }
1795
1796 switch (ifmgd->auth_data->algorithm) {
1797 case WLAN_AUTH_OPEN:
1798 case WLAN_AUTH_LEAP:
1799 case WLAN_AUTH_FT:
1800 break;
1801 case WLAN_AUTH_SHARED_KEY:
1802 if (ifmgd->auth_data->expected_transaction != 4) {
1803 ieee80211_auth_challenge(sdata, mgmt, len);
1804 /* need another frame */
1805 return RX_MGMT_NONE;
1806 }
1807 break;
1808 default:
1809 WARN_ONCE(1, "invalid auth alg %d",
1810 ifmgd->auth_data->algorithm);
1811 return RX_MGMT_NONE;
1812 }
1813
bdcbd8e0 1814 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1815 ifmgd->auth_data->done = true;
1816 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1817 run_again(ifmgd, ifmgd->auth_data->timeout);
1818
1819 /* move station state to auth */
1820 mutex_lock(&sdata->local->sta_mtx);
1821 sta = sta_info_get(sdata, bssid);
1822 if (!sta) {
1823 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1824 goto out_err;
1825 }
1826 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1827 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1828 goto out_err;
1829 }
1830 mutex_unlock(&sdata->local->sta_mtx);
1831
1832 return RX_MGMT_CFG80211_RX_AUTH;
1833 out_err:
1834 mutex_unlock(&sdata->local->sta_mtx);
1835 /* ignore frame -- wait for timeout */
1836 return RX_MGMT_NONE;
1837}
1838
1839
77fdaa12
JB		 1840static enum rx_mgmt_action __must_check
1841ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1842 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1843{
46900298 1844 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1845 const u8 *bssid = NULL;
f0706e82
JB		 1846 u16 reason_code;
1847
66e67e41
JB		 1848 lockdep_assert_held(&ifmgd->mtx);
1849
f4ea83dd 1850 if (len < 24 + 2)
77fdaa12 1851 return RX_MGMT_NONE;
f0706e82 1852
66e67e41 1853 if (!ifmgd->associated ||
b203ca39 1854 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1855 return RX_MGMT_NONE;
77fdaa12 1856
0c1ad2ca 1857 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1858
1859 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1860
bdcbd8e0
JB		 1861 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1862 bssid, reason_code);
77fdaa12 1863
37ad3888
JB		 1864 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1865
7da7cc1d 1866 mutex_lock(&sdata->local->mtx);
63f170e0 1867 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1868 mutex_unlock(&sdata->local->mtx);
f0706e82 1869
77fdaa12 1870 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1871}
1872
1873
77fdaa12
JB		 1874static enum rx_mgmt_action __must_check
1875ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1876 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1877{
46900298 1878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1879 u16 reason_code;
1880
66e67e41 1881 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1882
66e67e41 1883 if (len < 24 + 2)
77fdaa12
JB		 1884 return RX_MGMT_NONE;
1885
66e67e41 1886 if (!ifmgd->associated ||
b203ca39 1887 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1888 return RX_MGMT_NONE;
f0706e82
JB		 1889
1890 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1891
bdcbd8e0
JB		 1892 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1893 mgmt->sa, reason_code);
f0706e82 1894
37ad3888
JB		 1895 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1896
7da7cc1d 1897 mutex_lock(&sdata->local->mtx);
bc83b681 1898 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1899 mutex_unlock(&sdata->local->mtx);
37ad3888 1900
77fdaa12 1901 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1902}
1903
c74d084f
CL		 1904static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1905 u8 *supp_rates, unsigned int supp_rates_len,
1906 u32 *rates, u32 *basic_rates,
1907 bool *have_higher_than_11mbit,
1908 int *min_rate, int *min_rate_index)
1909{
1910 int i, j;
1911
1912 for (i = 0; i < supp_rates_len; i++) {
1913 int rate = (supp_rates[i] & 0x7f) * 5;
1914 bool is_basic = !!(supp_rates[i] & 0x80);
1915
1916 if (rate > 110)
1917 *have_higher_than_11mbit = true;
1918
1919 /*
1920 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1921 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1922 *
1923 * Note: Even through the membership selector and the basic
1924 * rate flag share the same bit, they are not exactly
1925 * the same.
1926 */
1927 if (!!(supp_rates[i] & 0x80) &&
1928 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1929 continue;
1930
1931 for (j = 0; j < sband->n_bitrates; j++) {
1932 if (sband->bitrates[j].bitrate == rate) {
1933 *rates |= BIT(j);
1934 if (is_basic)
1935 *basic_rates |= BIT(j);
1936 if (rate < *min_rate) {
1937 *min_rate = rate;
1938 *min_rate_index = j;
1939 }
1940 break;
1941 }
1942 }
1943 }
1944}
f0706e82 1945
66e67e41
JB		 1946static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1947 bool assoc)
1948{
1949 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1950
1951 lockdep_assert_held(&sdata->u.mgd.mtx);
1952
66e67e41
JB		 1953 if (!assoc) {
1954 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1955
1956 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1957 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1958 }
1959
1960 kfree(assoc_data);
1961 sdata->u.mgd.assoc_data = NULL;
1962}
1963
1964static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1965 struct cfg80211_bss *cbss,
af6b6374 1966 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1967{
46900298 1968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1969 struct ieee80211_local *local = sdata->local;
8318d78a 1970 struct ieee80211_supported_band *sband;
f0706e82 1971 struct sta_info *sta;
af6b6374 1972 u8 *pos;
af6b6374 1973 u16 capab_info, aid;
f0706e82 1974 struct ieee802_11_elems elems;
bda3933a 1975 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1976 u32 changed = 0;
c74d084f 1977 int err;
f0706e82 1978
af6b6374 1979 /* AssocResp and ReassocResp have identical structure */
f0706e82 1980
f0706e82 1981 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1982 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1983
1dd84aa2 1984 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 1985 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
1986 aid);
1dd84aa2
JB		 1987 aid &= ~(BIT(15) | BIT(14));
1988
05cb9108
JB		 1989 ifmgd->broken_ap = false;
1990
1991 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 1992 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
1993 aid);
05cb9108
JB		 1994 aid = 0;
1995 ifmgd->broken_ap = true;
1996 }
1997
af6b6374
JB		 1998 pos = mgmt->u.assoc_resp.variable;
1999 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2000
f0706e82 2001 if (!elems.supp_rates) {
bdcbd8e0 2002 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2003 return false;
f0706e82
JB		 2004 }
2005
46900298 2006 ifmgd->aid = aid;
f0706e82 2007
2a33bee2
GE		 2008 mutex_lock(&sdata->local->sta_mtx);
2009 /*
2010 * station info was already allocated and inserted before
2011 * the association and should be available to us
2012 */
7852e361 2013 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2014 if (WARN_ON(!sta)) {
2015 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2016 return false;
77fdaa12 2017 }
05e5e883 2018
66e67e41 2019 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2020
ab1faead 2021 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2022 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2023 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2024
64f68e5d
JB		 2025 sta->supports_40mhz =
2026 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2027
4b7679a5 2028 rate_control_rate_init(sta);
f0706e82 2029
46900298 2030 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2031 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2032
ddf4ac53 2033 if (elems.wmm_param)
c2c98fde 2034 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2035
c8987876
JB		 2036 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2037 if (!err)
2038 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2039 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2040 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2041 if (err) {
bdcbd8e0
JB		 2042 sdata_info(sdata,
2043 "failed to move station %pM to desired state\n",
2044 sta->sta.addr);
c8987876
JB		 2045 WARN_ON(__sta_info_destroy(sta));
2046 mutex_unlock(&sdata->local->sta_mtx);
2047 return false;
2048 }
2049
7852e361 2050 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2051
f2176d72
JO		 2052 /*
2053 * Always handle WMM once after association regardless
2054 * of the first value the AP uses. Setting -1 here has
2055 * that effect because the AP values is an unsigned
2056 * 4-bit value.
2057 */
2058 ifmgd->wmm_last_param_set = -1;
2059
ddf4ac53 2060 if (elems.wmm_param)
4ced3f74 2061 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2062 elems.wmm_param_len);
aa837e1d 2063 else
3abead59
JB		 2064 ieee80211_set_wmm_default(sdata, false);
2065 changed |= BSS_CHANGED_QOS;
f0706e82 2066
074d46d1 2067 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2068 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2069 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2070 cbss->bssid, false);
ae5eb026 2071
60f8b39c
JB		 2072 /* set AID and assoc capability,
2073 * ieee80211_set_associated() will tell the driver */
2074 bss_conf->aid = aid;
2075 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2076 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2077
d524215f
FF		 2078 /*
2079 * If we're using 4-addr mode, let the AP know that we're
2080 * doing so, so that it can create the STA VLAN on its side
2081 */
2082 if (ifmgd->use_4addr)
2083 ieee80211_send_4addr_nullfunc(local, sdata);
2084
15b7b062 2085 /*
b291ba11
JB		 2086 * Start timer to probe the connection to the AP now.
2087 * Also start the timer that will detect beacon loss.
15b7b062 2088 */
b291ba11 2089 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2090 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2091
af6b6374 2092 return true;
f0706e82
JB		 2093}
2094
66e67e41
JB		 2095static enum rx_mgmt_action __must_check
2096ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2097 struct ieee80211_mgmt *mgmt, size_t len,
2098 struct cfg80211_bss **bss)
2099{
2100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2101 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2102 u16 capab_info, status_code, aid;
2103 struct ieee802_11_elems elems;
2104 u8 *pos;
2105 bool reassoc;
2106
2107 lockdep_assert_held(&ifmgd->mtx);
2108
2109 if (!assoc_data)
2110 return RX_MGMT_NONE;
b203ca39 2111 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2112 return RX_MGMT_NONE;
2113
2114 /*
2115 * AssocResp and ReassocResp have identical structure, so process both
2116 * of them in this function.
2117 */
2118
2119 if (len < 24 + 6)
2120 return RX_MGMT_NONE;
2121
2122 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2123 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2124 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2125 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2126
bdcbd8e0
JB		 2127 sdata_info(sdata,
2128 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2129 reassoc ? "Rea" : "A", mgmt->sa,
2130 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2131
2132 pos = mgmt->u.assoc_resp.variable;
2133 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2134
2135 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2136 elems.timeout_int && elems.timeout_int_len == 5 &&
2137 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2138 u32 tu, ms;
2139 tu = get_unaligned_le32(elems.timeout_int + 1);
2140 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2141 sdata_info(sdata,
2142 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2143 mgmt->sa, tu, ms);
66e67e41
JB		 2144 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2145 if (ms > IEEE80211_ASSOC_TIMEOUT)
2146 run_again(ifmgd, assoc_data->timeout);
2147 return RX_MGMT_NONE;
2148 }
2149
2150 *bss = assoc_data->bss;
2151
2152 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2153 sdata_info(sdata, "%pM denied association (code=%d)\n",
2154 mgmt->sa, status_code);
66e67e41
JB		 2155 ieee80211_destroy_assoc_data(sdata, false);
2156 } else {
bdcbd8e0 2157 sdata_info(sdata, "associated\n");
66e67e41 2158
66e67e41
JB		 2159 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2160 /* oops -- internal error -- send timeout for now */
79ebfb85 2161 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2162 sta_info_destroy_addr(sdata, mgmt->bssid);
2163 cfg80211_put_bss(*bss);
2164 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2165 }
79ebfb85
JB		 2166
2167 /*
2168 * destroy assoc_data afterwards, as otherwise an idle
2169 * recalc after assoc_data is NULL but before associated
2170 * is set can cause the interface to go idle
2171 */
2172 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2173 }
2174
2175 return RX_MGMT_CFG80211_RX_ASSOC;
2176}
98c8fccf
JB		 2177static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2178 struct ieee80211_mgmt *mgmt,
2179 size_t len,
2180 struct ieee80211_rx_status *rx_status,
2181 struct ieee802_11_elems *elems,
2182 bool beacon)
2183{
2184 struct ieee80211_local *local = sdata->local;
2185 int freq;
c2b13452 2186 struct ieee80211_bss *bss;
98c8fccf 2187 struct ieee80211_channel *channel;
56007a02
JB		 2188 bool need_ps = false;
2189
66e67e41 2190 if (sdata->u.mgd.associated &&
b203ca39 2191 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2192 bss = (void *)sdata->u.mgd.associated->priv;
2193 /* not previously set so we may need to recalc */
2194 need_ps = !bss->dtim_period;
2195 }
98c8fccf
JB		 2196
2197 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2198 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2199 rx_status->band);
98c8fccf
JB		 2200 else
2201 freq = rx_status->freq;
2202
2203 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2204
2205 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2206 return;
2207
98c8fccf 2208 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2209 channel, beacon);
77fdaa12
JB		 2210 if (bss)
2211 ieee80211_rx_bss_put(local, bss);
2212
2213 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2214 return;
2215
56007a02
JB		 2216 if (need_ps) {
2217 mutex_lock(&local->iflist_mtx);
2218 ieee80211_recalc_ps(local, -1);
2219 mutex_unlock(&local->iflist_mtx);
2220 }
2221
c481ec97 2222 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2223 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2224 ETH_ALEN) == 0)) {
c481ec97
S		 2225 struct ieee80211_channel_sw_ie *sw_elem =
2226 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2227 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2228 bss, rx_status->mactime);
c481ec97 2229 }
f0706e82
JB		 2230}
2231
2232
f698d856 2233static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2234 struct sk_buff *skb)
f0706e82 2235{
af6b6374 2236 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2237 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2238 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2239 size_t baselen, len = skb->len;
ae6a44e3
EK		 2240 struct ieee802_11_elems elems;
2241
15b7b062
KV		 2242 ifmgd = &sdata->u.mgd;
2243
77fdaa12
JB		 2244 ASSERT_MGD_MTX(ifmgd);
2245
b203ca39 2246 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2247 return; /* ignore ProbeResp to foreign address */
2248
ae6a44e3
EK		 2249 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2250 if (baselen > len)
2251 return;
2252
2253 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2254 &elems);
2255
98c8fccf 2256 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2257
77fdaa12 2258 if (ifmgd->associated &&
b203ca39 2259 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2260 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2261
2262 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2263 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2264 /* got probe response, continue with auth */
bdcbd8e0 2265 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2266 ifmgd->auth_data->tries = 0;
2267 ifmgd->auth_data->timeout = jiffies;
2268 run_again(ifmgd, ifmgd->auth_data->timeout);
2269 }
f0706e82
JB		 2270}
2271
d91f36db
JB		 2272/*
2273 * This is the canonical list of information elements we care about,
2274 * the filter code also gives us all changes to the Microsoft OUI
2275 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2276 *
2277 * We implement beacon filtering in software since that means we can
2278 * avoid processing the frame here and in cfg80211, and userspace
2279 * will not be able to tell whether the hardware supports it or not.
2280 *
2281 * XXX: This list needs to be dynamic -- userspace needs to be able to
2282 * add items it requires. It also needs to be able to tell us to
2283 * look out for other vendor IEs.
2284 */
2285static const u64 care_about_ies =
1d4df3a5
JB		 2286 (1ULL << WLAN_EID_COUNTRY) |
2287 (1ULL << WLAN_EID_ERP_INFO) |
2288 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2289 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2290 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2291 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2292
f698d856 2293static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2294 struct ieee80211_mgmt *mgmt,
2295 size_t len,
2296 struct ieee80211_rx_status *rx_status)
2297{
d91f36db 2298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2299 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2300 size_t baselen;
2301 struct ieee802_11_elems elems;
f698d856 2302 struct ieee80211_local *local = sdata->local;
471b3efd 2303 u32 changed = 0;
d91f36db 2304 bool erp_valid, directed_tim = false;
7a5158ef 2305 u8 erp_value = 0;
d91f36db 2306 u32 ncrc;
77fdaa12
JB		 2307 u8 *bssid;
2308
66e67e41 2309 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2310
ae6a44e3
EK		 2311 /* Process beacon from the current BSS */
2312 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2313 if (baselen > len)
2314 return;
2315
d91f36db 2316 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2317 return;
f0706e82 2318
66e67e41 2319 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2320 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2321 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2322 len - baselen, &elems);
77fdaa12 2323
66e67e41
JB		 2324 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2325 false);
2326 ifmgd->assoc_data->have_beacon = true;
2327 ifmgd->assoc_data->sent_assoc = false;
2328 /* continue assoc process */
2329 ifmgd->assoc_data->timeout = jiffies;
2330 run_again(ifmgd, ifmgd->assoc_data->timeout);
2331 return;
2332 }
77fdaa12 2333
66e67e41 2334 if (!ifmgd->associated ||
b203ca39 2335 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2336 return;
66e67e41 2337 bssid = ifmgd->associated->bssid;
f0706e82 2338
17e4ec14
JM		 2339 /* Track average RSSI from the Beacon frames of the current AP */
2340 ifmgd->last_beacon_signal = rx_status->signal;
2341 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2342 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2343 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2344 ifmgd->last_cqm_event_signal = 0;
391a200a 2345 ifmgd->count_beacon_signal = 1;
615f7b9b 2346 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2347 } else {
2348 ifmgd->ave_beacon_signal =
2349 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2350 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2351 ifmgd->ave_beacon_signal) / 16;
391a200a 2352 ifmgd->count_beacon_signal++;
17e4ec14 2353 }
615f7b9b
MV		 2354
2355 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2356 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2357 int sig = ifmgd->ave_beacon_signal;
2358 int last_sig = ifmgd->last_ave_beacon_signal;
2359
2360 /*
2361 * if signal crosses either of the boundaries, invoke callback
2362 * with appropriate parameters
2363 */
2364 if (sig > ifmgd->rssi_max_thold &&
2365 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2366 ifmgd->last_ave_beacon_signal = sig;
2367 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2368 } else if (sig < ifmgd->rssi_min_thold &&
2369 (last_sig >= ifmgd->rssi_max_thold ||
2370 last_sig == 0)) {
2371 ifmgd->last_ave_beacon_signal = sig;
2372 drv_rssi_callback(local, RSSI_EVENT_LOW);
2373 }
2374 }
2375
17e4ec14 2376 if (bss_conf->cqm_rssi_thold &&
391a200a 2377 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2378 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2379 int sig = ifmgd->ave_beacon_signal / 16;
2380 int last_event = ifmgd->last_cqm_event_signal;
2381 int thold = bss_conf->cqm_rssi_thold;
2382 int hyst = bss_conf->cqm_rssi_hyst;
2383 if (sig < thold &&
2384 (last_event == 0 || sig < last_event - hyst)) {
2385 ifmgd->last_cqm_event_signal = sig;
2386 ieee80211_cqm_rssi_notify(
2387 &sdata->vif,
2388 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2389 GFP_KERNEL);
2390 } else if (sig > thold &&
2391 (last_event == 0 || sig > last_event + hyst)) {
2392 ifmgd->last_cqm_event_signal = sig;
2393 ieee80211_cqm_rssi_notify(
2394 &sdata->vif,
2395 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2396 GFP_KERNEL);
2397 }
2398 }
2399
b291ba11 2400 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2401 mlme_dbg_ratelimited(sdata,
2402 "cancelling probereq poll due to a received beacon\n");
925e64c3 2403 mutex_lock(&local->mtx);
b291ba11 2404 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2405 ieee80211_run_deferred_scan(local);
2406 mutex_unlock(&local->mtx);
2407
4e751843
JB		 2408 mutex_lock(&local->iflist_mtx);
2409 ieee80211_recalc_ps(local, -1);
2410 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2411 }
2412
b291ba11
JB		 2413 /*
2414 * Push the beacon loss detection into the future since
2415 * we are processing a beacon from the AP just now.
2416 */
d3a910a8 2417 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2418
d91f36db
JB		 2419 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2420 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2421 len - baselen, &elems,
2422 care_about_ies, ncrc);
2423
2424 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2425 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2426 ifmgd->aid);
d91f36db 2427
d8ec4433 2428 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2429 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2430 true);
d91f36db 2431
4ced3f74 2432 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2433 elems.wmm_param_len);
2434 }
fe3fa827 2435
25c9c875 2436 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2437 if (directed_tim) {
572e0012 2438 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2439 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2440 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2441 ieee80211_hw_config(local,
2442 IEEE80211_CONF_CHANGE_PS);
2443 }
572e0012 2444 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2445 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2446 local->pspolling = true;
2447
2448 /*
2449 * Here is assumed that the driver will be
2450 * able to send ps-poll frame and receive a
2451 * response even though power save mode is
2452 * enabled, but some drivers might require
2453 * to disable power save here. This needs
2454 * to be investigated.
2455 */
2456 ieee80211_send_pspoll(local, sdata);
2457 }
a97b77b9
VN		 2458 }
2459 }
7a5158ef 2460
d8ec4433 2461 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2462 return;
2463 ifmgd->beacon_crc = ncrc;
d8ec4433 2464 ifmgd->beacon_crc_valid = true;
30196673 2465
7a5158ef
JB		 2466 if (elems.erp_info && elems.erp_info_len >= 1) {
2467 erp_valid = true;
2468 erp_value = elems.erp_info[0];
2469 } else {
2470 erp_valid = false;
50c4afb9 2471 }
7a5158ef
JB		 2472 changed |= ieee80211_handle_bss_capability(sdata,
2473 le16_to_cpu(mgmt->u.beacon.capab_info),
2474 erp_valid, erp_value);
f0706e82 2475
d3c990fb 2476
074d46d1 2477 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2478 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2479 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2480
2481 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2482
24398e39
JB		 2483 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2484 bssid, true);
d3c990fb
RR		 2485 }
2486
8b19e6ca 2487 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2488 if (elems.country_elem) {
a8302de9
VT		 2489 /* TODO: IBSS also needs this */
2490 if (elems.pwr_constr_elem)
2491 ieee80211_handle_pwr_constr(sdata,
2492 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2493 elems.pwr_constr_elem,
2494 elems.pwr_constr_elem_len);
3f2355cb
LR		 2495 }
2496
471b3efd 2497 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2498}
2499
1fa57d01
JB		 2500void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2501 struct sk_buff *skb)
f0706e82 2502{
77fdaa12 2503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2504 struct ieee80211_rx_status *rx_status;
f0706e82 2505 struct ieee80211_mgmt *mgmt;
66e67e41 2506 struct cfg80211_bss *bss = NULL;
77fdaa12 2507 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2508 u16 fc;
2509
f0706e82
JB		 2510 rx_status = (struct ieee80211_rx_status *) skb->cb;
2511 mgmt = (struct ieee80211_mgmt *) skb->data;
2512 fc = le16_to_cpu(mgmt->frame_control);
2513
77fdaa12
JB		 2514 mutex_lock(&ifmgd->mtx);
2515
66e67e41
JB		 2516 switch (fc & IEEE80211_FCTL_STYPE) {
2517 case IEEE80211_STYPE_BEACON:
2518 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2519 break;
2520 case IEEE80211_STYPE_PROBE_RESP:
2521 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2522 break;
2523 case IEEE80211_STYPE_AUTH:
2524 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2525 break;
2526 case IEEE80211_STYPE_DEAUTH:
2527 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2528 break;
2529 case IEEE80211_STYPE_DISASSOC:
2530 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2531 break;
2532 case IEEE80211_STYPE_ASSOC_RESP:
2533 case IEEE80211_STYPE_REASSOC_RESP:
2534 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2535 break;
2536 case IEEE80211_STYPE_ACTION:
2537 switch (mgmt->u.action.category) {
2538 case WLAN_CATEGORY_SPECTRUM_MGMT:
2539 ieee80211_sta_process_chanswitch(sdata,
2540 &mgmt->u.action.u.chan_switch.sw_elem,
2541 (void *)ifmgd->associated->priv,
2542 rx_status->mactime);
77fdaa12 2543 break;
77fdaa12 2544 }
77fdaa12 2545 }
77fdaa12
JB		 2546 mutex_unlock(&ifmgd->mtx);
2547
66e67e41
JB		 2548 switch (rma) {
2549 case RX_MGMT_NONE:
2550 /* no action */
2551 break;
2552 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2553 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2554 break;
2555 case RX_MGMT_CFG80211_DISASSOC:
2556 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2557 break;
2558 case RX_MGMT_CFG80211_RX_AUTH:
2559 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2560 break;
2561 case RX_MGMT_CFG80211_RX_ASSOC:
2562 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2563 break;
2564 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2565 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2566 break;
2567 default:
2568 WARN(1, "unexpected: %d", rma);
b054b747 2569 }
f0706e82
JB		 2570}
2571
9c6bd790 2572static void ieee80211_sta_timer(unsigned long data)
f0706e82 2573{
60f8b39c
JB		 2574 struct ieee80211_sub_if_data *sdata =
2575 (struct ieee80211_sub_if_data *) data;
46900298 2576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2577 struct ieee80211_local *local = sdata->local;
f0706e82 2578
5bb644a0
JB		 2579 if (local->quiescing) {
2580 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2581 return;
2582 }
2583
64592c8f 2584 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2585}
2586
04ac3c0e 2587static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2588 u8 *bssid, u8 reason)
04ac3c0e
FF		 2589{
2590 struct ieee80211_local *local = sdata->local;
2591 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2592 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2593
37ad3888
JB		 2594 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2595 false, frame_buf);
04ac3c0e 2596 mutex_unlock(&ifmgd->mtx);
37ad3888 2597
04ac3c0e
FF		 2598 /*
2599 * must be outside lock due to cfg80211,
2600 * but that's not a problem.
2601 */
5fef7dbc 2602 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2603
2604 mutex_lock(&local->mtx);
2605 ieee80211_recalc_idle(local);
2606 mutex_unlock(&local->mtx);
2607
04ac3c0e
FF		 2608 mutex_lock(&ifmgd->mtx);
2609}
2610
66e67e41
JB		 2611static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2612{
2613 struct ieee80211_local *local = sdata->local;
2614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2615 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2616
2617 lockdep_assert_held(&ifmgd->mtx);
2618
2619 if (WARN_ON_ONCE(!auth_data))
2620 return -EINVAL;
2621
66e67e41
JB		 2622 auth_data->tries++;
2623
2624 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2625 sdata_info(sdata, "authentication with %pM timed out\n",
2626 auth_data->bss->bssid);
66e67e41
JB		 2627
2628 /*
2629 * Most likely AP is not in the range so remove the
2630 * bss struct for that AP.
2631 */
2632 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2633
2634 return -ETIMEDOUT;
2635 }
2636
2637 if (auth_data->bss->proberesp_ies) {
bdcbd8e0
JB		 2638 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2639 auth_data->bss->bssid, auth_data->tries,
2640 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2641
2642 auth_data->expected_transaction = 2;
2643 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2644 auth_data->ie, auth_data->ie_len,
2645 auth_data->bss->bssid,
2646 auth_data->bss->bssid, NULL, 0, 0);
2647 } else {
2648 const u8 *ssidie;
2649
bdcbd8e0
JB		 2650 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2651 auth_data->bss->bssid, auth_data->tries,
2652 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2653
2654 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2655 if (!ssidie)
2656 return -EINVAL;
2657 /*
2658 * Direct probe is sent to broadcast address as some APs
2659 * will not answer to direct packet in unassociated state.
2660 */
2661 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2662 NULL, 0, (u32) -1, true, false);
2663 }
2664
2665 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2666 run_again(ifmgd, auth_data->timeout);
2667
2668 return 0;
2669}
2670
2671static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2672{
2673 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2674 struct ieee80211_local *local = sdata->local;
2675
2676 lockdep_assert_held(&sdata->u.mgd.mtx);
2677
66e67e41
JB		 2678 assoc_data->tries++;
2679 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2680 sdata_info(sdata, "association with %pM timed out\n",
2681 assoc_data->bss->bssid);
66e67e41
JB		 2682
2683 /*
2684 * Most likely AP is not in the range so remove the
2685 * bss struct for that AP.
2686 */
2687 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2688
2689 return -ETIMEDOUT;
2690 }
2691
bdcbd8e0
JB		 2692 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2693 assoc_data->bss->bssid, assoc_data->tries,
2694 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2695 ieee80211_send_assoc(sdata);
2696
2697 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2698 run_again(&sdata->u.mgd, assoc_data->timeout);
2699
2700 return 0;
2701}
2702
1fa57d01 2703void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2704{
9c6bd790 2705 struct ieee80211_local *local = sdata->local;
1fa57d01 2706 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2707
77fdaa12
JB		 2708 mutex_lock(&ifmgd->mtx);
2709
66e67e41
JB		 2710 if (ifmgd->auth_data &&
2711 time_after(jiffies, ifmgd->auth_data->timeout)) {
2712 if (ifmgd->auth_data->done) {
2713 /*
2714 * ok ... we waited for assoc but userspace didn't,
2715 * so let's just kill the auth data
2716 */
2717 ieee80211_destroy_auth_data(sdata, false);
2718 } else if (ieee80211_probe_auth(sdata)) {
2719 u8 bssid[ETH_ALEN];
2720
2721 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2722
2723 ieee80211_destroy_auth_data(sdata, false);
2724
2725 mutex_unlock(&ifmgd->mtx);
2726 cfg80211_send_auth_timeout(sdata->dev, bssid);
2727 mutex_lock(&ifmgd->mtx);
2728 }
2729 } else if (ifmgd->auth_data)
2730 run_again(ifmgd, ifmgd->auth_data->timeout);
2731
2732 if (ifmgd->assoc_data &&
2733 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2734 if (!ifmgd->assoc_data->have_beacon ||
2735 ieee80211_do_assoc(sdata)) {
2736 u8 bssid[ETH_ALEN];
2737
2738 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2739
2740 ieee80211_destroy_assoc_data(sdata, false);
2741
2742 mutex_unlock(&ifmgd->mtx);
2743 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2744 mutex_lock(&ifmgd->mtx);
2745 }
2746 } else if (ifmgd->assoc_data)
2747 run_again(ifmgd, ifmgd->assoc_data->timeout);
2748
b291ba11
JB		 2749 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2750 IEEE80211_STA_CONNECTION_POLL) &&
2751 ifmgd->associated) {
a43abf29 2752 u8 bssid[ETH_ALEN];
72a8a3ed 2753 int max_tries;
a43abf29 2754
0c1ad2ca 2755 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2756
72a8a3ed 2757 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2758 max_tries = max_nullfunc_tries;
72a8a3ed 2759 else
180205bd 2760 max_tries = max_probe_tries;
72a8a3ed 2761
4e5ff376
FF		 2762 /* ACK received for nullfunc probing frame */
2763 if (!ifmgd->probe_send_count)
2764 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2765 else if (ifmgd->nullfunc_failed) {
2766 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2767 mlme_dbg(sdata,
2768 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2769 bssid, ifmgd->probe_send_count,
2770 max_tries);
04ac3c0e
FF		 2771 ieee80211_mgd_probe_ap_send(sdata);
2772 } else {
bdcbd8e0
JB		 2773 mlme_dbg(sdata,
2774 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2775 bssid);
95acac61
JB		 2776 ieee80211_sta_connection_lost(sdata, bssid,
2777 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2778 }
2779 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2780 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2781 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2782 mlme_dbg(sdata,
2783 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2784 bssid, probe_wait_ms);
95acac61
JB		 2785 ieee80211_sta_connection_lost(sdata, bssid,
2786 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2787 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2788 mlme_dbg(sdata,
2789 "No probe response from AP %pM after %dms, try %d/%i\n",
2790 bssid, probe_wait_ms,
2791 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2792 ieee80211_mgd_probe_ap_send(sdata);
2793 } else {
b291ba11
JB		 2794 /*
2795 * We actually lost the connection ... or did we?
2796 * Let's make sure!
2797 */
b38afa87
BG		 2798 wiphy_debug(local->hw.wiphy,
2799 "%s: No probe response from AP %pM"
2800 " after %dms, disconnecting.\n",
2801 sdata->name,
180205bd 2802 bssid, probe_wait_ms);
04ac3c0e 2803
95acac61
JB		 2804 ieee80211_sta_connection_lost(sdata, bssid,
2805 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2806 }
2807 }
2808
77fdaa12 2809 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2810
2811 mutex_lock(&local->mtx);
2812 ieee80211_recalc_idle(local);
2813 mutex_unlock(&local->mtx);
f0706e82
JB		 2814}
2815
b291ba11
JB		 2816static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2817{
2818 struct ieee80211_sub_if_data *sdata =
2819 (struct ieee80211_sub_if_data *) data;
2820 struct ieee80211_local *local = sdata->local;
2821
2822 if (local->quiescing)
2823 return;
2824
1e4dcd01
JO		 2825 ieee80211_queue_work(&sdata->local->hw,
2826 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2827}
2828
2829static void ieee80211_sta_conn_mon_timer(unsigned long data)
2830{
2831 struct ieee80211_sub_if_data *sdata =
2832 (struct ieee80211_sub_if_data *) data;
2833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2834 struct ieee80211_local *local = sdata->local;
2835
2836 if (local->quiescing)
2837 return;
2838
42935eca 2839 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2840}
2841
2842static void ieee80211_sta_monitor_work(struct work_struct *work)
2843{
2844 struct ieee80211_sub_if_data *sdata =
2845 container_of(work, struct ieee80211_sub_if_data,
2846 u.mgd.monitor_work);
2847
2848 ieee80211_mgd_probe_ap(sdata, false);
2849}
2850
9c6bd790
JB		 2851static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2852{
494f1fe5
EP		 2853 u32 flags;
2854
ad935687 2855 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2856 __ieee80211_stop_poll(sdata);
ad935687 2857
b291ba11 2858 /* let's probe the connection once */
494f1fe5
EP		 2859 flags = sdata->local->hw.flags;
2860 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2861 ieee80211_queue_work(&sdata->local->hw,
2862 &sdata->u.mgd.monitor_work);
b291ba11 2863 /* and do all the other regular work too */
64592c8f 2864 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2865 }
9c6bd790 2866}
f0706e82 2867
5bb644a0
JB		 2868#ifdef CONFIG_PM
2869void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2870{
2871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2872
2873 /*
2874 * we need to use atomic bitops for the running bits
2875 * only because both timers might fire at the same
2876 * time -- the code here is properly synchronised.
2877 */
2878
d1f5b7a3
JB		 2879 cancel_work_sync(&ifmgd->request_smps_work);
2880
0ecfe806 2881 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2882 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2883 if (del_timer_sync(&ifmgd->timer))
2884 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2885
2886 cancel_work_sync(&ifmgd->chswitch_work);
2887 if (del_timer_sync(&ifmgd->chswitch_timer))
2888 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2889
b291ba11
JB		 2890 /* these will just be re-established on connection */
2891 del_timer_sync(&ifmgd->conn_mon_timer);
2892 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2893}
2894
2895void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2896{
2897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2898
676b58c2
RM		 2899 if (!ifmgd->associated)
2900 return;
2901
95acac61
JB		 2902 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2903 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2904 mutex_lock(&ifmgd->mtx);
2905 if (ifmgd->associated) {
bdcbd8e0
JB		 2906 mlme_dbg(sdata,
2907 "driver requested disconnect after resume\n");
95acac61
JB		 2908 ieee80211_sta_connection_lost(sdata,
2909 ifmgd->associated->bssid,
2910 WLAN_REASON_UNSPECIFIED);
2911 mutex_unlock(&ifmgd->mtx);
2912 return;
2913 }
2914 mutex_unlock(&ifmgd->mtx);
2915 }
2916
5bb644a0
JB		 2917 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2918 add_timer(&ifmgd->timer);
2919 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2920 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2921 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2922
2923 mutex_lock(&sdata->local->mtx);
46090979 2924 ieee80211_restart_sta_timer(sdata);
925e64c3 2925 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2926}
2927#endif
2928
9c6bd790
JB		 2929/* interface setup */
2930void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2931{
46900298 2932 struct ieee80211_if_managed *ifmgd;
988c0f72 2933
46900298 2934 ifmgd = &sdata->u.mgd;
b291ba11 2935 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2936 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2937 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2938 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2939 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2940 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2941 (unsigned long) sdata);
b291ba11
JB		 2942 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2943 (unsigned long) sdata);
2944 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2945 (unsigned long) sdata);
46900298 2946 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2947 (unsigned long) sdata);
9c6bd790 2948
ab1faead 2949 ifmgd->flags = 0;
1478acb3 2950 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2951 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2952 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2953
77fdaa12 2954 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2955
2956 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2957 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2958 else
2959 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2960}
2961
77fdaa12
JB		 2962/* scan finished notification */
2963void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2964{
77fdaa12 2965 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2966
77fdaa12
JB		 2967 /* Restart STA timers */
2968 rcu_read_lock();
2969 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2970 ieee80211_restart_sta_timer(sdata);
2971 rcu_read_unlock();
2972}
60f8b39c 2973
77fdaa12
JB		 2974int ieee80211_max_network_latency(struct notifier_block *nb,
2975 unsigned long data, void *dummy)
2976{
2977 s32 latency_usec = (s32) data;
2978 struct ieee80211_local *local =
2979 container_of(nb, struct ieee80211_local,
2980 network_latency_notifier);
1fa6f4af 2981
77fdaa12
JB		 2982 mutex_lock(&local->iflist_mtx);
2983 ieee80211_recalc_ps(local, latency_usec);
2984 mutex_unlock(&local->iflist_mtx);
dfe67012 2985
77fdaa12 2986 return 0;
9c6bd790
JB		 2987}
2988
a1cf775d 2989static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 2990 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 2991{
2992 struct ieee80211_local *local = sdata->local;
2993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 2994 struct ieee80211_bss *bss = (void *)cbss->priv;
6df653c7 2995 struct sta_info *sta = NULL;
a1cf775d
JB		 2996 bool have_sta = false;
2997 int err;
24398e39
JB		 2998 int ht_cfreq;
2999 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3000 const u8 *ht_oper_ie;
3001 const struct ieee80211_ht_operation *ht_oper = NULL;
3002 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3003
3004 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3005 return -EINVAL;
3006
3007 if (assoc) {
3008 rcu_read_lock();
5d6a1b06 3009 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3010 rcu_read_unlock();
3011 }
3012
3013 if (!have_sta) {
5d6a1b06 3014 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3015 if (!sta)
3016 return -ENOMEM;
3017 }
3018
3019 mutex_lock(&local->mtx);
3020 ieee80211_recalc_idle(sdata->local);
3021 mutex_unlock(&local->mtx);
3022
3023 /* switch to the right channel */
24398e39
JB		 3024 sband = local->hw.wiphy->bands[cbss->channel->band];
3025
3026 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3027
3028 if (sband->ht_cap.ht_supported) {
3029 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3030 cbss->information_elements,
3031 cbss->len_information_elements);
3032 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3033 ht_oper = (void *)(ht_oper_ie + 2);
3034 }
3035
3036 if (ht_oper) {
3037 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3038 cbss->channel->band);
3039 /* check that channel matches the right operating channel */
3040 if (cbss->channel->center_freq != ht_cfreq) {
3041 /*
3042 * It's possible that some APs are confused here;
3043 * Netgear WNDR3700 sometimes reports 4 higher than
3044 * the actual channel in association responses, but
3045 * since we look at probe response/beacon data here
3046 * it should be OK.
3047 */
bdcbd8e0
JB		 3048 sdata_info(sdata,
3049 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3050 cbss->channel->center_freq,
3051 ht_cfreq, ht_oper->primary_chan,
3052 cbss->channel->band);
24398e39
JB		 3053 ht_oper = NULL;
3054 }
3055 }
3056
3057 if (ht_oper) {
3058 channel_type = NL80211_CHAN_HT20;
3059
3060 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3061 switch (ht_oper->ht_param &
3062 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3063 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3064 channel_type = NL80211_CHAN_HT40PLUS;
3065 break;
3066 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3067 channel_type = NL80211_CHAN_HT40MINUS;
3068 break;
3069 }
3070 }
3071 }
3072
3073 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3074 /* can only fail due to HT40+/- mismatch */
3075 channel_type = NL80211_CHAN_HT20;
bdcbd8e0
JB		 3076 sdata_info(sdata,
3077 "disabling 40 MHz due to multi-vif mismatch\n");
24398e39
JB		 3078 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3079 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3080 channel_type));
3081 }
3082
5d6a1b06 3083 local->oper_channel = cbss->channel;
6aee4ca3 3084 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
a1cf775d 3085
6df653c7 3086 if (sta) {
5d6a1b06
JB		 3087 u32 rates = 0, basic_rates = 0;
3088 bool have_higher_than_11mbit;
3089 int min_rate = INT_MAX, min_rate_index = -1;
3090
5d6a1b06
JB		 3091 ieee80211_get_rates(sband, bss->supp_rates,
3092 bss->supp_rates_len,
3093 &rates, &basic_rates,
3094 &have_higher_than_11mbit,
3095 &min_rate, &min_rate_index);
3096
3097 /*
3098 * This used to be a workaround for basic rates missing
3099 * in the association response frame. Now that we no
3100 * longer use the basic rates from there, it probably
3101 * doesn't happen any more, but keep the workaround so
3102 * in case some *other* APs are buggy in different ways
3103 * we can connect -- with a warning.
3104 */
3105 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3106 sdata_info(sdata,
3107 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3108 basic_rates = BIT(min_rate_index);
3109 }
3110
3111 sta->sta.supp_rates[cbss->channel->band] = rates;
3112 sdata->vif.bss_conf.basic_rates = basic_rates;
3113
3114 /* cf. IEEE 802.11 9.2.12 */
3115 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3116 have_higher_than_11mbit)
3117 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3118 else
3119 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3120
3121 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3122
3123 /* tell driver about BSSID and basic rates */
3124 ieee80211_bss_info_change_notify(sdata,
3125 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3126
3127 if (assoc)
3128 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3129
3130 err = sta_info_insert(sta);
3131 sta = NULL;
3132 if (err) {
bdcbd8e0
JB		 3133 sdata_info(sdata,
3134 "failed to insert STA entry for the AP (error %d)\n",
3135 err);
a1cf775d
JB		 3136 return err;
3137 }
3138 } else
b203ca39 3139 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3140
3141 return 0;
3142}
3143
77fdaa12
JB		 3144/* config hooks */
3145int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3146 struct cfg80211_auth_request *req)
9c6bd790 3147{
66e67e41
JB		 3148 struct ieee80211_local *local = sdata->local;
3149 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3150 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3151 u16 auth_alg;
66e67e41
JB		 3152 int err;
3153
3154 /* prepare auth data structure */
9c6bd790 3155
77fdaa12
JB		 3156 switch (req->auth_type) {
3157 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3158 auth_alg = WLAN_AUTH_OPEN;
3159 break;
3160 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3161 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3162 return -EOPNOTSUPP;
77fdaa12
JB		 3163 auth_alg = WLAN_AUTH_SHARED_KEY;
3164 break;
3165 case NL80211_AUTHTYPE_FT:
3166 auth_alg = WLAN_AUTH_FT;
3167 break;
3168 case NL80211_AUTHTYPE_NETWORK_EAP:
3169 auth_alg = WLAN_AUTH_LEAP;
3170 break;
3171 default:
3172 return -EOPNOTSUPP;
60f8b39c 3173 }
77fdaa12 3174
66e67e41
JB		 3175 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3176 if (!auth_data)
9c6bd790 3177 return -ENOMEM;
77fdaa12 3178
66e67e41 3179 auth_data->bss = req->bss;
77fdaa12
JB		 3180
3181 if (req->ie && req->ie_len) {
66e67e41
JB		 3182 memcpy(auth_data->ie, req->ie, req->ie_len);
3183 auth_data->ie_len = req->ie_len;
9c6bd790 3184 }
77fdaa12 3185
fffd0934 3186 if (req->key && req->key_len) {
66e67e41
JB		 3187 auth_data->key_len = req->key_len;
3188 auth_data->key_idx = req->key_idx;
3189 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3190 }
3191
66e67e41 3192 auth_data->algorithm = auth_alg;
60f8b39c 3193
66e67e41 3194 /* try to authenticate/probe */
2a33bee2 3195
66e67e41 3196 mutex_lock(&ifmgd->mtx);
2a33bee2 3197
66e67e41
JB		 3198 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3199 ifmgd->assoc_data) {
3200 err = -EBUSY;
3201 goto err_free;
2a33bee2
GE		 3202 }
3203
66e67e41
JB		 3204 if (ifmgd->auth_data)
3205 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3206
66e67e41
JB		 3207 /* prep auth_data so we don't go into idle on disassoc */
3208 ifmgd->auth_data = auth_data;
af6b6374 3209
66e67e41 3210 if (ifmgd->associated)
37ad3888 3211 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3212
bdcbd8e0 3213 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3214
a1cf775d
JB		 3215 err = ieee80211_prep_connection(sdata, req->bss, false);
3216 if (err)
66e67e41 3217 goto err_clear;
af6b6374 3218
66e67e41
JB		 3219 err = ieee80211_probe_auth(sdata);
3220 if (err) {
66e67e41
JB		 3221 sta_info_destroy_addr(sdata, req->bss->bssid);
3222 goto err_clear;
3223 }
3224
3225 /* hold our own reference */
3226 cfg80211_ref_bss(auth_data->bss);
3227 err = 0;
3228 goto out_unlock;
3229
3230 err_clear:
3231 ifmgd->auth_data = NULL;
3232 err_free:
3233 kfree(auth_data);
3234 out_unlock:
3235 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3236
66e67e41 3237 return err;
af6b6374
JB		 3238}
3239
77fdaa12
JB		 3240int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3241 struct cfg80211_assoc_request *req)
f0706e82 3242{
66e67e41 3243 struct ieee80211_local *local = sdata->local;
77fdaa12 3244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3245 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3246 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3247 struct ieee80211_supported_band *sband;
9dde6423 3248 const u8 *ssidie, *ht_ie;
2a33bee2 3249 int i, err;
f0706e82 3250
66e67e41
JB		 3251 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3252 if (!ssidie)
3253 return -EINVAL;
3254
3255 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3256 if (!assoc_data)
3257 return -ENOMEM;
3258
77fdaa12 3259 mutex_lock(&ifmgd->mtx);
9c87ba67 3260
66e67e41 3261 if (ifmgd->associated)
37ad3888 3262 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3263
3264 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3265 err = -EBUSY;
3266 goto err_free;
af6b6374 3267 }
77fdaa12 3268
66e67e41
JB		 3269 if (ifmgd->assoc_data) {
3270 err = -EBUSY;
3271 goto err_free;
3272 }
77fdaa12 3273
66e67e41
JB		 3274 if (ifmgd->auth_data) {
3275 bool match;
3276
3277 /* keep sta info, bssid if matching */
b203ca39 3278 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3279 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3280 }
3281
66e67e41
JB		 3282 /* prepare assoc data */
3283
77fdaa12 3284 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3285 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3286
d8ec4433
JO		 3287 ifmgd->beacon_crc_valid = false;
3288
de5036aa
JB		 3289 /*
3290 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3291 * We still associate in non-HT mode (11a/b/g) if any one of these
3292 * ciphers is configured as pairwise.
3293 * We can set this to true for non-11n hardware, that'll be checked
3294 * separately along with the peer capabilities.
3295 */
1c4cb928 3296 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3297 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3298 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3299 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3300 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3301 netdev_info(sdata->dev,
3302 "disabling HT due to WEP/TKIP use\n");
3303 }
3304 }
77fdaa12 3305
ef96a842
BG		 3306 if (req->flags & ASSOC_REQ_DISABLE_HT)
3307 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3308
4e74bfdb
JB		 3309 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3310 sband = local->hw.wiphy->bands[req->bss->channel->band];
3311 if (!sband->ht_cap.ht_supported ||
1c4cb928 3312 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3313 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3314 netdev_info(sdata->dev,
3315 "disabling HT as WMM/QoS is not supported\n");
3316 }
4e74bfdb 3317
ef96a842
BG		 3318 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3319 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3320 sizeof(ifmgd->ht_capa_mask));
3321
77fdaa12 3322 if (req->ie && req->ie_len) {
66e67e41
JB		 3323 memcpy(assoc_data->ie, req->ie, req->ie_len);
3324 assoc_data->ie_len = req->ie_len;
3325 }
f679f65d 3326
66e67e41 3327 assoc_data->bss = req->bss;
f679f65d 3328
af6b6374
JB		 3329 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3330 if (ifmgd->powersave)
3331 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3332 else
3333 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3334 } else
3335 ifmgd->ap_smps = ifmgd->req_smps;
3336
66e67e41 3337 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3338 assoc_data->wmm = bss->wmm_used &&
3339 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3340 assoc_data->supp_rates = bss->supp_rates;
3341 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3342
3343 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3344 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3345 assoc_data->ap_ht_param =
3346 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3347 else
3348 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3349
ab13315a
KV		 3350 if (bss->wmm_used && bss->uapsd_supported &&
3351 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3352 assoc_data->uapsd = true;
ab13315a
KV		 3353 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3354 } else {
76f0303d 3355 assoc_data->uapsd = false;
ab13315a
KV		 3356 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3357 }
3358
66e67e41
JB		 3359 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3360 assoc_data->ssid_len = ssidie[1];
63f170e0 3361
77fdaa12 3362 if (req->prev_bssid)
66e67e41 3363 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3364
3365 if (req->use_mfp) {
3366 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3367 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3368 } else {
3369 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3370 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3371 }
3372
3373 if (req->crypto.control_port)
3374 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3375 else
3376 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3377
a621fa4d
JB		 3378 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3379 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3380
66e67e41
JB		 3381 /* kick off associate process */
3382
3383 ifmgd->assoc_data = assoc_data;
3384
a1cf775d
JB		 3385 err = ieee80211_prep_connection(sdata, req->bss, true);
3386 if (err)
3387 goto err_clear;
66e67e41
JB		 3388
3389 if (!bss->dtim_period &&
3390 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3391 /*
3392 * Wait up to one beacon interval ...
3393 * should this be more if we miss one?
3394 */
bdcbd8e0
JB		 3395 sdata_info(sdata, "waiting for beacon from %pM\n",
3396 ifmgd->bssid);
3f9768a5 3397 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3398 } else {
3399 assoc_data->have_beacon = true;
3400 assoc_data->sent_assoc = false;
3401 assoc_data->timeout = jiffies;
3402 }
3403 run_again(ifmgd, assoc_data->timeout);
3404
fcff4f10
PS		 3405 if (bss->corrupt_data) {
3406 char *corrupt_type = "data";
3407 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3408 if (bss->corrupt_data &
3409 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3410 corrupt_type = "beacon and probe response";
3411 else
3412 corrupt_type = "beacon";
3413 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3414 corrupt_type = "probe response";
bdcbd8e0
JB		 3415 sdata_info(sdata, "associating with AP with corrupt %s\n",
3416 corrupt_type);
fcff4f10
PS		 3417 }
3418
66e67e41
JB		 3419 err = 0;
3420 goto out;
3421 err_clear:
3422 ifmgd->assoc_data = NULL;
3423 err_free:
3424 kfree(assoc_data);
3425 out:
3426 mutex_unlock(&ifmgd->mtx);
3427
3428 return err;
f0706e82
JB		 3429}
3430
77fdaa12 3431int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3432 struct cfg80211_deauth_request *req)
f0706e82 3433{
46900298 3434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3435 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3436
77fdaa12
JB		 3437 mutex_lock(&ifmgd->mtx);
3438
37ad3888 3439 if (ifmgd->auth_data) {
66e67e41 3440 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3441 mutex_unlock(&ifmgd->mtx);
66e67e41 3442 return 0;
af6b6374 3443 }
77fdaa12 3444
bdcbd8e0
JB		 3445 sdata_info(sdata,
3446 "deauthenticating from %pM by local choice (reason=%d)\n",
3447 req->bssid, req->reason_code);
0ff71613 3448
37ad3888 3449 if (ifmgd->associated &&
b203ca39 3450 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
37ad3888 3451 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3452 req->reason_code, true, frame_buf);
37ad3888
JB		 3453 else
3454 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3455 IEEE80211_STYPE_DEAUTH,
3456 req->reason_code, true,
3457 frame_buf);
3458 mutex_unlock(&ifmgd->mtx);
3459
5fef7dbc 3460 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3461
7da7cc1d 3462 mutex_lock(&sdata->local->mtx);
bc83b681 3463 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3464 mutex_unlock(&sdata->local->mtx);
bc83b681 3465
f0706e82
JB		 3466 return 0;
3467}
84363e6e 3468
77fdaa12 3469int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3470 struct cfg80211_disassoc_request *req)
9c6bd790 3471{
77fdaa12 3472 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3473 u8 bssid[ETH_ALEN];
5fef7dbc 3474 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3475
77fdaa12 3476 mutex_lock(&ifmgd->mtx);
10f644a4 3477
8d8b261a
JB		 3478 /*
3479 * cfg80211 should catch this ... but it's racy since
3480 * we can receive a disassoc frame, process it, hand it
3481 * to cfg80211 while that's in a locked section already
3482 * trying to tell us that the user wants to disconnect.
3483 */
0c1ad2ca 3484 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3485 mutex_unlock(&ifmgd->mtx);
3486 return -ENOLINK;
3487 }
3488
bdcbd8e0
JB		 3489 sdata_info(sdata,
3490 "disassociating from %pM by local choice (reason=%d)\n",
3491 req->bss->bssid, req->reason_code);
0ff71613 3492
e69e95db 3493 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3494 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3495 req->reason_code, !req->local_state_change,
3496 frame_buf);
77fdaa12 3497 mutex_unlock(&ifmgd->mtx);
10f644a4 3498
5fef7dbc 3499 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3500
7da7cc1d 3501 mutex_lock(&sdata->local->mtx);
bc83b681 3502 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3503 mutex_unlock(&sdata->local->mtx);
bc83b681 3504
10f644a4
JB		 3505 return 0;
3506}
026331c4 3507
afa762f6 3508void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3509{
3510 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3511
3512 mutex_lock(&ifmgd->mtx);
3513 if (ifmgd->assoc_data)
3514 ieee80211_destroy_assoc_data(sdata, false);
3515 if (ifmgd->auth_data)
3516 ieee80211_destroy_auth_data(sdata, false);
3517 del_timer_sync(&ifmgd->timer);
3518 mutex_unlock(&ifmgd->mtx);
3519}
3520
a97c13c3
JO		 3521void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3522 enum nl80211_cqm_rssi_threshold_event rssi_event,
3523 gfp_t gfp)
3524{
3525 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3526
b5878a2d
JB		 3527 trace_api_cqm_rssi_notify(sdata, rssi_event);
3528
a97c13c3
JO		 3529 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3530}
3531EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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