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mwifiex: retrieve correct max_power information in reg_notifier handler
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
66e67e41
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
180205bd
BG		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 48
49/*
7ccc8bd7
FF		 50 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
b291ba11 56 */
7ccc8bd7
FF		 57#define IEEE80211_BEACON_LOSS_COUNT 7
58
b291ba11
JB		 59/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
d1c5091f 63#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 64/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
180205bd
BG		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
f0706e82 74
17e4ec14
JM		 75/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
391a200a
JM		 82/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
5bb644a0
JB		 88#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
5fef7dbc
JB		 91#define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
149 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 150 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 151}
152
be099e82
LR		 153void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
154{
0c699c3a
LR		 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
156
8628172f
SG		 157 if (unlikely(!sdata->u.mgd.associated))
158 return;
159
be099e82
LR		 160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
161 return;
162
163 mod_timer(&sdata->u.mgd.conn_mon_timer,
164 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 165
166 ifmgd->probe_send_count = 0;
be099e82
LR		 167}
168
5484e237 169static int ecw2cw(int ecw)
60f8b39c 170{
5484e237 171 return (1 << ecw) - 1;
60f8b39c
JB		 172}
173
24398e39
JB		 174static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_ht_operation *ht_oper,
176 const u8 *bssid, bool reconfig)
d5522e03
JB		 177{
178 struct ieee80211_local *local = sdata->local;
179 struct ieee80211_supported_band *sband;
d5522e03
JB		 180 struct sta_info *sta;
181 u32 changed = 0;
9ed6bcce 182 u16 ht_opmode;
64f68e5d 183 bool disable_40 = false;
d5522e03
JB		 184
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
d5522e03 186
64f68e5d
JB		 187 switch (sdata->vif.bss_conf.channel_type) {
188 case NL80211_CHAN_HT40PLUS:
189 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
190 disable_40 = true;
191 break;
192 case NL80211_CHAN_HT40MINUS:
193 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
194 disable_40 = true;
195 break;
196 default:
197 break;
198 }
d5522e03 199
24398e39
JB		 200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 202 disable_40 = true;
203
204 mutex_lock(&local->sta_mtx);
205 sta = sta_info_get(sdata, bssid);
d5522e03 206
64f68e5d
JB		 207 WARN_ON_ONCE(!sta);
208
209 if (sta && !sta->supports_40mhz)
210 disable_40 = true;
211
212 if (sta && (!reconfig ||
91a0099c 213 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 214 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 215
64f68e5d
JB		 216 if (disable_40)
217 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
218 else
219 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 220
64f68e5d 221 rate_control_rate_update(local, sband, sta,
8f727ef3 222 IEEE80211_RC_BW_CHANGED);
0aaffa9b 223 }
64f68e5d 224 mutex_unlock(&local->sta_mtx);
d5522e03 225
074d46d1 226 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 227
228 /* if bss configuration changed store the new one */
24398e39 229 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 230 changed |= BSS_CHANGED_HT;
9ed6bcce 231 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 232 }
233
234 return changed;
235}
236
9c6bd790
JB		 237/* frame sending functions */
238
66e67e41
JB		 239static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
240 struct ieee80211_supported_band *sband,
241 u32 *rates)
242{
243 int i, j, count;
244 *rates = 0;
245 count = 0;
246 for (i = 0; i < supp_rates_len; i++) {
247 int rate = (supp_rates[i] & 0x7F) * 5;
248
249 for (j = 0; j < sband->n_bitrates; j++)
250 if (sband->bitrates[j].bitrate == rate) {
251 *rates |= BIT(j);
252 count++;
253 break;
254 }
255 }
256
257 return count;
258}
259
260static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 261 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
265{
66e67e41
JB		 266 u8 *pos;
267 u32 flags = channel->flags;
268 u16 cap;
269 struct ieee80211_sta_ht_cap ht_cap;
270
271 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
272
66e67e41
JB		 273 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
274 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
275
66e67e41
JB		 276 /* determine capability flags */
277 cap = ht_cap.cap;
278
9dde6423 279 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
282 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
283 cap &= ~IEEE80211_HT_CAP_SGI_40;
284 }
285 break;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
287 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
288 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
289 cap &= ~IEEE80211_HT_CAP_SGI_40;
290 }
291 break;
292 }
293
24398e39
JB		 294 /*
295 * If 40 MHz was disabled associate as though we weren't
296 * capable of 40 MHz -- some broken APs will never fall
297 * back to trying to transmit in 20 MHz.
298 */
299 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
300 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
301 cap &= ~IEEE80211_HT_CAP_SGI_40;
302 }
303
66e67e41
JB		 304 /* set SM PS mode properly */
305 cap &= ~IEEE80211_HT_CAP_SM_PS;
306 switch (smps) {
307 case IEEE80211_SMPS_AUTOMATIC:
308 case IEEE80211_SMPS_NUM_MODES:
309 WARN_ON(1);
310 case IEEE80211_SMPS_OFF:
311 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
312 IEEE80211_HT_CAP_SM_PS_SHIFT;
313 break;
314 case IEEE80211_SMPS_STATIC:
315 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
316 IEEE80211_HT_CAP_SM_PS_SHIFT;
317 break;
318 case IEEE80211_SMPS_DYNAMIC:
319 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
320 IEEE80211_HT_CAP_SM_PS_SHIFT;
321 break;
322 }
323
324 /* reserve and fill IE */
325 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
326 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
327}
328
329static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
330{
331 struct ieee80211_local *local = sdata->local;
332 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
333 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
334 struct sk_buff *skb;
335 struct ieee80211_mgmt *mgmt;
336 u8 *pos, qos_info;
337 size_t offset = 0, noffset;
338 int i, count, rates_len, supp_rates_len;
339 u16 capab;
340 struct ieee80211_supported_band *sband;
341 u32 rates = 0;
66e67e41
JB		 342
343 lockdep_assert_held(&ifmgd->mtx);
344
345 sband = local->hw.wiphy->bands[local->oper_channel->band];
346
347 if (assoc_data->supp_rates_len) {
348 /*
349 * Get all rates supported by the device and the AP as
350 * some APs don't like getting a superset of their rates
351 * in the association request (e.g. D-Link DAP 1353 in
352 * b-only mode)...
353 */
354 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
355 assoc_data->supp_rates_len,
356 sband, &rates);
357 } else {
358 /*
359 * In case AP not provide any supported rates information
360 * before association, we send information element(s) with
361 * all rates that we support.
362 */
363 rates = ~0;
364 rates_len = sband->n_bitrates;
365 }
366
367 skb = alloc_skb(local->hw.extra_tx_headroom +
368 sizeof(*mgmt) + /* bit too much but doesn't matter */
369 2 + assoc_data->ssid_len + /* SSID */
370 4 + rates_len + /* (extended) rates */
371 4 + /* power capability */
372 2 + 2 * sband->n_channels + /* supported channels */
373 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
374 assoc_data->ie_len + /* extra IEs */
375 9, /* WMM */
376 GFP_KERNEL);
377 if (!skb)
378 return;
379
380 skb_reserve(skb, local->hw.extra_tx_headroom);
381
382 capab = WLAN_CAPABILITY_ESS;
383
384 if (sband->band == IEEE80211_BAND_2GHZ) {
385 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
386 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
387 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
388 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
389 }
390
391 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
392 capab |= WLAN_CAPABILITY_PRIVACY;
393
394 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
395 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
396 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
397
398 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
399 memset(mgmt, 0, 24);
400 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
401 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
402 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
403
404 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
405 skb_put(skb, 10);
406 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
407 IEEE80211_STYPE_REASSOC_REQ);
408 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
409 mgmt->u.reassoc_req.listen_interval =
410 cpu_to_le16(local->hw.conf.listen_interval);
411 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
412 ETH_ALEN);
413 } else {
414 skb_put(skb, 4);
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_ASSOC_REQ);
417 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.assoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
420 }
421
422 /* SSID */
423 pos = skb_put(skb, 2 + assoc_data->ssid_len);
424 *pos++ = WLAN_EID_SSID;
425 *pos++ = assoc_data->ssid_len;
426 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
427
428 /* add all rates which were marked to be used above */
429 supp_rates_len = rates_len;
430 if (supp_rates_len > 8)
431 supp_rates_len = 8;
432
433 pos = skb_put(skb, supp_rates_len + 2);
434 *pos++ = WLAN_EID_SUPP_RATES;
435 *pos++ = supp_rates_len;
436
437 count = 0;
438 for (i = 0; i < sband->n_bitrates; i++) {
439 if (BIT(i) & rates) {
440 int rate = sband->bitrates[i].bitrate;
441 *pos++ = (u8) (rate / 5);
442 if (++count == 8)
443 break;
444 }
445 }
446
447 if (rates_len > count) {
448 pos = skb_put(skb, rates_len - count + 2);
449 *pos++ = WLAN_EID_EXT_SUPP_RATES;
450 *pos++ = rates_len - count;
451
452 for (i++; i < sband->n_bitrates; i++) {
453 if (BIT(i) & rates) {
454 int rate = sband->bitrates[i].bitrate;
455 *pos++ = (u8) (rate / 5);
456 }
457 }
458 }
459
460 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
461 /* 1. power capabilities */
462 pos = skb_put(skb, 4);
463 *pos++ = WLAN_EID_PWR_CAPABILITY;
464 *pos++ = 2;
465 *pos++ = 0; /* min tx power */
466 *pos++ = local->oper_channel->max_power; /* max tx power */
467
468 /* 2. supported channels */
469 /* TODO: get this in reg domain format */
470 pos = skb_put(skb, 2 * sband->n_channels + 2);
471 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
472 *pos++ = 2 * sband->n_channels;
473 for (i = 0; i < sband->n_channels; i++) {
474 *pos++ = ieee80211_frequency_to_channel(
475 sband->channels[i].center_freq);
476 *pos++ = 1; /* one channel in the subband*/
477 }
478 }
479
480 /* if present, add any custom IEs that go before HT */
481 if (assoc_data->ie_len && assoc_data->ie) {
482 static const u8 before_ht[] = {
483 WLAN_EID_SSID,
484 WLAN_EID_SUPP_RATES,
485 WLAN_EID_EXT_SUPP_RATES,
486 WLAN_EID_PWR_CAPABILITY,
487 WLAN_EID_SUPPORTED_CHANNELS,
488 WLAN_EID_RSN,
489 WLAN_EID_QOS_CAPA,
490 WLAN_EID_RRM_ENABLED_CAPABILITIES,
491 WLAN_EID_MOBILITY_DOMAIN,
492 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
493 };
494 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
495 before_ht, ARRAY_SIZE(before_ht),
496 offset);
497 pos = skb_put(skb, noffset - offset);
498 memcpy(pos, assoc_data->ie + offset, noffset - offset);
499 offset = noffset;
500 }
501
4e74bfdb 502 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
9dde6423 503 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
66e67e41
JB		 504 sband, local->oper_channel, ifmgd->ap_smps);
505
506 /* if present, add any custom non-vendor IEs that go after HT */
507 if (assoc_data->ie_len && assoc_data->ie) {
508 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
509 assoc_data->ie_len,
510 offset);
511 pos = skb_put(skb, noffset - offset);
512 memcpy(pos, assoc_data->ie + offset, noffset - offset);
513 offset = noffset;
514 }
515
76f0303d
JB		 516 if (assoc_data->wmm) {
517 if (assoc_data->uapsd) {
dc41e4d4
EP		 518 qos_info = ifmgd->uapsd_queues;
519 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 520 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
521 } else {
522 qos_info = 0;
523 }
524
525 pos = skb_put(skb, 9);
526 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
527 *pos++ = 7; /* len */
528 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
529 *pos++ = 0x50;
530 *pos++ = 0xf2;
531 *pos++ = 2; /* WME */
532 *pos++ = 0; /* WME info */
533 *pos++ = 1; /* WME ver */
534 *pos++ = qos_info;
535 }
536
537 /* add any remaining custom (i.e. vendor specific here) IEs */
538 if (assoc_data->ie_len && assoc_data->ie) {
539 noffset = assoc_data->ie_len;
540 pos = skb_put(skb, noffset - offset);
541 memcpy(pos, assoc_data->ie + offset, noffset - offset);
542 }
543
544 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
545 ieee80211_tx_skb(sdata, skb);
546}
547
ef422bc0 548static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 549 const u8 *bssid, u16 stype,
5fef7dbc
JB		 550 u16 reason, bool send_frame,
551 u8 *frame_buf)
9ac19a90
JB		 552{
553 struct ieee80211_local *local = sdata->local;
46900298 554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 555 struct sk_buff *skb;
5fef7dbc 556 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 557
5fef7dbc
JB		 558 /* build frame */
559 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
560 mgmt->duration = 0; /* initialize only */
561 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 562 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 563 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 564 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 565 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 566 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
567
5fef7dbc
JB		 568 if (send_frame) {
569 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
570 DEAUTH_DISASSOC_LEN);
571 if (!skb)
572 return;
d5cdfacb 573
5fef7dbc
JB		 574 skb_reserve(skb, local->hw.extra_tx_headroom);
575
576 /* copy in frame */
577 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
578 mgmt, DEAUTH_DISASSOC_LEN);
579
580 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
581 IEEE80211_SKB_CB(skb)->flags |=
582 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 583 ieee80211_tx_skb(sdata, skb);
5fef7dbc 584 }
9ac19a90
JB		 585}
586
572e0012
KV		 587void ieee80211_send_pspoll(struct ieee80211_local *local,
588 struct ieee80211_sub_if_data *sdata)
589{
572e0012
KV		 590 struct ieee80211_pspoll *pspoll;
591 struct sk_buff *skb;
572e0012 592
d8cd189e
KV		 593 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
594 if (!skb)
572e0012 595 return;
572e0012 596
d8cd189e
KV		 597 pspoll = (struct ieee80211_pspoll *) skb->data;
598 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 599
62ae67be
JB		 600 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
601 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 602}
603
965bedad
JB		 604void ieee80211_send_nullfunc(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata,
606 int powersave)
607{
608 struct sk_buff *skb;
d8cd189e 609 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 610 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 611
d8cd189e
KV		 612 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
613 if (!skb)
965bedad 614 return;
965bedad 615
d8cd189e 616 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 617 if (powersave)
d8cd189e 618 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 619
62ae67be 620 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 621 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
622 IEEE80211_STA_CONNECTION_POLL))
623 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
624
62ae67be 625 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 626}
627
d524215f
FF		 628static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
629 struct ieee80211_sub_if_data *sdata)
630{
631 struct sk_buff *skb;
632 struct ieee80211_hdr *nullfunc;
633 __le16 fc;
634
635 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
636 return;
637
638 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 639 if (!skb)
d524215f 640 return;
d15b8459 641
d524215f
FF		 642 skb_reserve(skb, local->hw.extra_tx_headroom);
643
644 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
645 memset(nullfunc, 0, 30);
646 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
647 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
648 nullfunc->frame_control = fc;
649 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
650 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
651 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
652 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
653
654 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
655 ieee80211_tx_skb(sdata, skb);
656}
657
cc32abd4
JB		 658/* spectrum management related things */
659static void ieee80211_chswitch_work(struct work_struct *work)
660{
661 struct ieee80211_sub_if_data *sdata =
662 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
664
9607e6b6 665 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 666 return;
667
77fdaa12
JB		 668 mutex_lock(&ifmgd->mtx);
669 if (!ifmgd->associated)
670 goto out;
cc32abd4
JB		 671
672 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 673 if (!sdata->local->ops->channel_switch) {
674 /* call "hw_config" only if doing sw channel switch */
675 ieee80211_hw_config(sdata->local,
676 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 677 } else {
678 /* update the device channel directly */
679 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 680 }
77fdaa12 681
cc32abd4 682 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 683 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 684
cc32abd4
JB		 685 ieee80211_wake_queues_by_reason(&sdata->local->hw,
686 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 687 out:
688 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
689 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 690}
691
5ce6e438
JB		 692void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
693{
694 struct ieee80211_sub_if_data *sdata;
695 struct ieee80211_if_managed *ifmgd;
696
697 sdata = vif_to_sdata(vif);
698 ifmgd = &sdata->u.mgd;
699
700 trace_api_chswitch_done(sdata, success);
701 if (!success) {
702 /*
703 * If the channel switch was not successful, stay
704 * around on the old channel. We currently lack
705 * good handling of this situation, possibly we
706 * should just drop the association.
707 */
708 sdata->local->csa_channel = sdata->local->oper_channel;
709 }
710
711 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
712}
713EXPORT_SYMBOL(ieee80211_chswitch_done);
714
cc32abd4
JB		 715static void ieee80211_chswitch_timer(unsigned long data)
716{
717 struct ieee80211_sub_if_data *sdata =
718 (struct ieee80211_sub_if_data *) data;
719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
720
5bb644a0
JB		 721 if (sdata->local->quiescing) {
722 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
723 return;
724 }
725
42935eca 726 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 727}
728
729void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
730 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 731 struct ieee80211_bss *bss,
732 u64 timestamp)
cc32abd4 733{
0c1ad2ca
JB		 734 struct cfg80211_bss *cbss =
735 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 736 struct ieee80211_channel *new_ch;
737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 738 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
739 cbss->channel->band);
cc32abd4 740
77fdaa12
JB		 741 ASSERT_MGD_MTX(ifmgd);
742
743 if (!ifmgd->associated)
cc32abd4
JB		 744 return;
745
fbe9c429 746 if (sdata->local->scanning)
cc32abd4
JB		 747 return;
748
749 /* Disregard subsequent beacons if we are already running a timer
750 processing a CSA */
751
752 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
753 return;
754
755 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
756 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
757 return;
758
759 sdata->local->csa_channel = new_ch;
760
5ce6e438
JB		 761 if (sdata->local->ops->channel_switch) {
762 /* use driver's channel switch callback */
763 struct ieee80211_channel_switch ch_switch;
764 memset(&ch_switch, 0, sizeof(ch_switch));
765 ch_switch.timestamp = timestamp;
766 if (sw_elem->mode) {
767 ch_switch.block_tx = true;
768 ieee80211_stop_queues_by_reason(&sdata->local->hw,
769 IEEE80211_QUEUE_STOP_REASON_CSA);
770 }
771 ch_switch.channel = new_ch;
772 ch_switch.count = sw_elem->count;
773 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
774 drv_channel_switch(sdata->local, &ch_switch);
775 return;
776 }
777
778 /* channel switch handled in software */
cc32abd4 779 if (sw_elem->count <= 1) {
42935eca 780 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 781 } else {
9feaddc7
WYG		 782 if (sw_elem->mode)
783 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 784 IEEE80211_QUEUE_STOP_REASON_CSA);
785 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
786 mod_timer(&ifmgd->chswitch_timer,
787 jiffies +
788 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 789 cbss->beacon_interval));
cc32abd4
JB		 790 }
791}
792
793static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
794 u16 capab_info, u8 *pwr_constr_elem,
795 u8 pwr_constr_elem_len)
796{
797 struct ieee80211_conf *conf = &sdata->local->hw.conf;
798
799 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
800 return;
801
802 /* Power constraint IE length should be 1 octet */
803 if (pwr_constr_elem_len != 1)
804 return;
805
a48b13ac 806 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 807 (*pwr_constr_elem != sdata->local->power_constr_level)) {
808 sdata->local->power_constr_level = *pwr_constr_elem;
809 ieee80211_hw_config(sdata->local, 0);
810 }
811}
812
f90754c1
JO		 813void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
814{
815 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
816 struct ieee80211_local *local = sdata->local;
817 struct ieee80211_conf *conf = &local->hw.conf;
818
819 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
820 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
821 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
822
823 local->disable_dynamic_ps = false;
824 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
825}
826EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
827
828void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
829{
830 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
831 struct ieee80211_local *local = sdata->local;
832 struct ieee80211_conf *conf = &local->hw.conf;
833
834 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
835 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
836 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
837
838 local->disable_dynamic_ps = true;
839 conf->dynamic_ps_timeout = 0;
840 del_timer_sync(&local->dynamic_ps_timer);
841 ieee80211_queue_work(&local->hw,
842 &local->dynamic_ps_enable_work);
843}
844EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
845
965bedad
JB		 846/* powersave */
847static void ieee80211_enable_ps(struct ieee80211_local *local,
848 struct ieee80211_sub_if_data *sdata)
849{
850 struct ieee80211_conf *conf = &local->hw.conf;
851
d5edaedc
JB		 852 /*
853 * If we are scanning right now then the parameters will
854 * take effect when scan finishes.
855 */
fbe9c429 856 if (local->scanning)
d5edaedc
JB		 857 return;
858
965bedad
JB		 859 if (conf->dynamic_ps_timeout > 0 &&
860 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
861 mod_timer(&local->dynamic_ps_timer, jiffies +
862 msecs_to_jiffies(conf->dynamic_ps_timeout));
863 } else {
864 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
865 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 866
2a13052f
JO		 867 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
868 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
869 return;
870
871 conf->flags |= IEEE80211_CONF_PS;
872 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 873 }
874}
875
876static void ieee80211_change_ps(struct ieee80211_local *local)
877{
878 struct ieee80211_conf *conf = &local->hw.conf;
879
880 if (local->ps_sdata) {
965bedad
JB		 881 ieee80211_enable_ps(local, local->ps_sdata);
882 } else if (conf->flags & IEEE80211_CONF_PS) {
883 conf->flags &= ~IEEE80211_CONF_PS;
884 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
885 del_timer_sync(&local->dynamic_ps_timer);
886 cancel_work_sync(&local->dynamic_ps_enable_work);
887 }
888}
889
808118cb
JY		 890static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
891{
892 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
893 struct sta_info *sta = NULL;
c2c98fde 894 bool authorized = false;
808118cb
JY		 895
896 if (!mgd->powersave)
897 return false;
898
05cb9108
JB		 899 if (mgd->broken_ap)
900 return false;
901
808118cb
JY		 902 if (!mgd->associated)
903 return false;
904
905 if (!mgd->associated->beacon_ies)
906 return false;
907
908 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
909 IEEE80211_STA_CONNECTION_POLL))
910 return false;
911
912 rcu_read_lock();
913 sta = sta_info_get(sdata, mgd->bssid);
914 if (sta)
c2c98fde 915 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 916 rcu_read_unlock();
917
c2c98fde 918 return authorized;
808118cb
JY		 919}
920
965bedad 921/* need to hold RTNL or interface lock */
10f644a4 922void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 923{
924 struct ieee80211_sub_if_data *sdata, *found = NULL;
925 int count = 0;
195e294d 926 int timeout;
965bedad
JB		 927
928 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
929 local->ps_sdata = NULL;
930 return;
931 }
932
933 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 934 if (!ieee80211_sdata_running(sdata))
965bedad 935 continue;
8c7914de
RM		 936 if (sdata->vif.type == NL80211_IFTYPE_AP) {
937 /* If an AP vif is found, then disable PS
938 * by setting the count to zero thereby setting
939 * ps_sdata to NULL.
940 */
941 count = 0;
942 break;
943 }
965bedad
JB		 944 if (sdata->vif.type != NL80211_IFTYPE_STATION)
945 continue;
946 found = sdata;
947 count++;
948 }
949
808118cb 950 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 951 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 952 s32 beaconint_us;
953
954 if (latency < 0)
ed77134b 955 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 956
957 beaconint_us = ieee80211_tu_to_usec(
958 found->vif.bss_conf.beacon_int);
959
ff616381 960 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 961 if (timeout < 0) {
962 /*
ff616381
JO		 963 * Go to full PSM if the user configures a very low
964 * latency requirement.
0ab82b04
EP		 965 * The 2000 second value is there for compatibility
966 * until the PM_QOS_NETWORK_LATENCY is configured
967 * with real values.
195e294d 968 */
0ab82b04
EP		 969 if (latency > (1900 * USEC_PER_MSEC) &&
970 latency != (2000 * USEC_PER_SEC))
195e294d 971 timeout = 0;
ff616381
JO		 972 else
973 timeout = 100;
195e294d 974 }
f90754c1
JO		 975 local->dynamic_ps_user_timeout = timeout;
976 if (!local->disable_dynamic_ps)
977 conf->dynamic_ps_timeout =
978 local->dynamic_ps_user_timeout;
195e294d 979
04fe2037 980 if (beaconint_us > latency) {
10f644a4 981 local->ps_sdata = NULL;
04fe2037 982 } else {
56007a02 983 struct ieee80211_bss *bss;
04fe2037 984 int maxslp = 1;
56007a02 985 u8 dtimper;
04fe2037 986
56007a02
JB		 987 bss = (void *)found->u.mgd.associated->priv;
988 dtimper = bss->dtim_period;
989
990 /* If the TIM IE is invalid, pretend the value is 1 */
991 if (!dtimper)
992 dtimper = 1;
993 else if (dtimper > 1)
04fe2037
JB		 994 maxslp = min_t(int, dtimper,
995 latency / beaconint_us);
996
9ccebe61 997 local->hw.conf.max_sleep_period = maxslp;
56007a02 998 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 999 local->ps_sdata = found;
04fe2037 1000 }
10f644a4 1001 } else {
965bedad 1002 local->ps_sdata = NULL;
10f644a4 1003 }
965bedad
JB		 1004
1005 ieee80211_change_ps(local);
1006}
1007
1008void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1009{
1010 struct ieee80211_local *local =
1011 container_of(work, struct ieee80211_local,
1012 dynamic_ps_disable_work);
1013
1014 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1015 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1016 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1017 }
1018
1019 ieee80211_wake_queues_by_reason(&local->hw,
1020 IEEE80211_QUEUE_STOP_REASON_PS);
1021}
1022
1023void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1024{
1025 struct ieee80211_local *local =
1026 container_of(work, struct ieee80211_local,
1027 dynamic_ps_enable_work);
1028 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1029 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1030 unsigned long flags;
1031 int q;
965bedad
JB		 1032
1033 /* can only happen when PS was just disabled anyway */
1034 if (!sdata)
1035 return;
1036
5e34069c
CL		 1037 ifmgd = &sdata->u.mgd;
1038
965bedad
JB		 1039 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1040 return;
1041
77b7023a
AN		 1042 if (!local->disable_dynamic_ps &&
1043 local->hw.conf.dynamic_ps_timeout > 0) {
1044 /* don't enter PS if TX frames are pending */
1045 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1046 mod_timer(&local->dynamic_ps_timer, jiffies +
1047 msecs_to_jiffies(
1048 local->hw.conf.dynamic_ps_timeout));
1049 return;
1050 }
77b7023a
AN		 1051
1052 /*
1053 * transmission can be stopped by others which leads to
1054 * dynamic_ps_timer expiry. Postpone the ps timer if it
1055 * is not the actual idle state.
1056 */
1057 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1058 for (q = 0; q < local->hw.queues; q++) {
1059 if (local->queue_stop_reasons[q]) {
1060 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1061 flags);
1062 mod_timer(&local->dynamic_ps_timer, jiffies +
1063 msecs_to_jiffies(
1064 local->hw.conf.dynamic_ps_timeout));
1065 return;
1066 }
1067 }
1068 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1069 }
1ddc2867 1070
375177bf 1071 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1072 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1073 netif_tx_stop_all_queues(sdata->dev);
965bedad 1074
e8306f98
VN		 1075 if (drv_tx_frames_pending(local))
1076 mod_timer(&local->dynamic_ps_timer, jiffies +
1077 msecs_to_jiffies(
1078 local->hw.conf.dynamic_ps_timeout));
1079 else {
1080 ieee80211_send_nullfunc(local, sdata, 1);
1081 /* Flush to get the tx status of nullfunc frame */
1082 drv_flush(local, false);
1083 }
f3e85b9e
VN		 1084 }
1085
2a13052f
JO		 1086 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1087 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1088 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1089 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1090 local->hw.conf.flags |= IEEE80211_CONF_PS;
1091 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1092 }
f3e85b9e 1093
77b7023a
AN		 1094 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1095 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1096}
1097
1098void ieee80211_dynamic_ps_timer(unsigned long data)
1099{
1100 struct ieee80211_local *local = (void *) data;
1101
78f1a8b7 1102 if (local->quiescing || local->suspended)
5bb644a0
JB		 1103 return;
1104
42935eca 1105 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1106}
1107
60f8b39c 1108/* MLME */
f698d856 1109static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1110 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1111 u8 *wmm_param, size_t wmm_param_len)
1112{
f0706e82 1113 struct ieee80211_tx_queue_params params;
4ced3f74 1114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1115 size_t left;
1116 int count;
ab13315a 1117 u8 *pos, uapsd_queues = 0;
f0706e82 1118
e1b3ec1a
SG		 1119 if (!local->ops->conf_tx)
1120 return;
1121
32c5057b 1122 if (local->hw.queues < IEEE80211_NUM_ACS)
3434fbd3
JB		 1123 return;
1124
1125 if (!wmm_param)
1126 return;
1127
f0706e82
JB		 1128 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1129 return;
ab13315a
KV		 1130
1131 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1132 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1133
f0706e82 1134 count = wmm_param[6] & 0x0f;
46900298 1135 if (count == ifmgd->wmm_last_param_set)
f0706e82 1136 return;
46900298 1137 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1138
1139 pos = wmm_param + 8;
1140 left = wmm_param_len - 8;
1141
1142 memset(&params, 0, sizeof(params));
1143
00e96dec 1144 sdata->wmm_acm = 0;
f0706e82
JB		 1145 for (; left >= 4; left -= 4, pos += 4) {
1146 int aci = (pos[0] >> 5) & 0x03;
1147 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1148 bool uapsd = false;
f0706e82
JB		 1149 int queue;
1150
1151 switch (aci) {
0eeb59fe 1152 case 1: /* AC_BK */
e100bb64 1153 queue = 3;
988c0f72 1154 if (acm)
00e96dec 1155 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1156 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1157 uapsd = true;
f0706e82 1158 break;
0eeb59fe 1159 case 2: /* AC_VI */
e100bb64 1160 queue = 1;
988c0f72 1161 if (acm)
00e96dec 1162 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1163 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1164 uapsd = true;
f0706e82 1165 break;
0eeb59fe 1166 case 3: /* AC_VO */
e100bb64 1167 queue = 0;
988c0f72 1168 if (acm)
00e96dec 1169 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1170 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1171 uapsd = true;
f0706e82 1172 break;
0eeb59fe 1173 case 0: /* AC_BE */
f0706e82 1174 default:
e100bb64 1175 queue = 2;
988c0f72 1176 if (acm)
00e96dec 1177 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1178 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1179 uapsd = true;
f0706e82
JB		 1180 break;
1181 }
1182
1183 params.aifs = pos[0] & 0x0f;
1184 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1185 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1186 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1187 params.uapsd = uapsd;
1188
bdcbd8e0
JB		 1189 mlme_dbg(sdata,
1190 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1191 queue, aci, acm,
1192 params.aifs, params.cw_min, params.cw_max,
1193 params.txop, params.uapsd);
f6f3def3
EP		 1194 sdata->tx_conf[queue] = params;
1195 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1196 sdata_err(sdata,
1197 "failed to set TX queue parameters for queue %d\n",
1198 queue);
f0706e82 1199 }
e1b3ec1a
SG		 1200
1201 /* enable WMM or activate new settings */
4ced3f74 1202 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1203}
1204
925e64c3
SG		 1205static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1206{
1207 lockdep_assert_held(&sdata->local->mtx);
1208
1209 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1210 IEEE80211_STA_BEACON_POLL);
1211 ieee80211_run_deferred_scan(sdata->local);
1212}
1213
1214static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1215{
1216 mutex_lock(&sdata->local->mtx);
1217 __ieee80211_stop_poll(sdata);
1218 mutex_unlock(&sdata->local->mtx);
1219}
1220
7a5158ef
JB		 1221static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1222 u16 capab, bool erp_valid, u8 erp)
5628221c 1223{
bda3933a 1224 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1225 u32 changed = 0;
7a5158ef
JB		 1226 bool use_protection;
1227 bool use_short_preamble;
1228 bool use_short_slot;
1229
1230 if (erp_valid) {
1231 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1232 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1233 } else {
1234 use_protection = false;
1235 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1236 }
1237
1238 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1239 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1240 use_short_slot = true;
5628221c 1241
471b3efd 1242 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1243 bss_conf->use_cts_prot = use_protection;
1244 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1245 }
7e9ed188 1246
d43c7b37 1247 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1248 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1249 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1250 }
d9430a32 1251
7a5158ef 1252 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1253 bss_conf->use_short_slot = use_short_slot;
1254 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1255 }
1256
1257 return changed;
1258}
1259
f698d856 1260static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1261 struct cfg80211_bss *cbss,
ae5eb026 1262 u32 bss_info_changed)
f0706e82 1263{
0c1ad2ca 1264 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1265 struct ieee80211_local *local = sdata->local;
68542962 1266 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1267
ae5eb026 1268 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1269 /* set timing information */
68542962 1270 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1271 bss_conf->last_tsf = cbss->tsf;
5628221c 1272
77fdaa12
JB		 1273 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1274 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1275 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1276
7ccc8bd7
FF		 1277 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1278 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1279
0c1ad2ca
JB		 1280 sdata->u.mgd.associated = cbss;
1281 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1282
17e4ec14
JM		 1283 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1284
b291ba11 1285 /* just to be sure */
925e64c3 1286 ieee80211_stop_poll(sdata);
b291ba11 1287
9ac19a90 1288 ieee80211_led_assoc(local, 1);
9306102e 1289
e5b900d2
JB		 1290 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1291 bss_conf->dtim_period = bss->dtim_period;
1292 else
1293 bss_conf->dtim_period = 0;
1294
68542962 1295 bss_conf->assoc = 1;
9cef8737 1296
a97c13c3 1297 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1298 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1299 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1300 bss_info_changed |= BSS_CHANGED_CQM;
1301
68542962
JO		 1302 /* Enable ARP filtering */
1303 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1304 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1305 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1306 }
1307
ae5eb026 1308 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1309
056508dc
JB		 1310 mutex_lock(&local->iflist_mtx);
1311 ieee80211_recalc_ps(local, -1);
025e6be2 1312 ieee80211_recalc_smps(local);
056508dc 1313 mutex_unlock(&local->iflist_mtx);
e0cb686f 1314
8a5b33f5 1315 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1316 netif_carrier_on(sdata->dev);
f0706e82
JB		 1317}
1318
e69e95db 1319static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1320 u16 stype, u16 reason, bool tx,
1321 u8 *frame_buf)
aa458d17 1322{
46900298 1323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1324 struct ieee80211_local *local = sdata->local;
1325 struct sta_info *sta;
3cc5240b 1326 u32 changed = 0;
b291ba11 1327 u8 bssid[ETH_ALEN];
aa458d17 1328
77fdaa12
JB		 1329 ASSERT_MGD_MTX(ifmgd);
1330
37ad3888
JB		 1331 if (WARN_ON_ONCE(tx && !frame_buf))
1332 return;
1333
b291ba11
JB		 1334 if (WARN_ON(!ifmgd->associated))
1335 return;
1336
79543d8e
DS		 1337 ieee80211_stop_poll(sdata);
1338
0c1ad2ca 1339 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1340
77fdaa12
JB		 1341 ifmgd->associated = NULL;
1342 memset(ifmgd->bssid, 0, ETH_ALEN);
1343
1344 /*
1345 * we need to commit the associated = NULL change because the
1346 * scan code uses that to determine whether this iface should
1347 * go to/wake up from powersave or not -- and could otherwise
1348 * wake the queues erroneously.
1349 */
1350 smp_mb();
1351
1352 /*
1353 * Thus, we can only afterwards stop the queues -- to account
1354 * for the case where another CPU is finishing a scan at this
1355 * time -- we don't want the scan code to enable queues.
1356 */
aa458d17 1357
8a5b33f5 1358 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1359 netif_carrier_off(sdata->dev);
1360
2a419056 1361 mutex_lock(&local->sta_mtx);
abe60632 1362 sta = sta_info_get(sdata, bssid);
4cad6c7c 1363 if (sta) {
c2c98fde 1364 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1365 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1366 }
2a419056 1367 mutex_unlock(&local->sta_mtx);
aa458d17 1368
37ad3888
JB		 1369 /* deauthenticate/disassociate now */
1370 if (tx || frame_buf)
1371 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1372 tx, frame_buf);
1373
1374 /* flush out frame */
1375 if (tx)
1376 drv_flush(local, false);
1377
1378 /* remove AP and TDLS peers */
1379 sta_info_flush(local, sdata);
1380
1381 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1382 changed |= ieee80211_reset_erp_info(sdata);
1383
f5e5bf25 1384 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1385 changed |= BSS_CHANGED_ASSOC;
1386 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1387
413ad50a 1388 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1389 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1390 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1391
a8302de9
VT		 1392 local->power_constr_level = 0;
1393
520eb820
KV		 1394 del_timer_sync(&local->dynamic_ps_timer);
1395 cancel_work_sync(&local->dynamic_ps_enable_work);
1396
e0cb686f
KV		 1397 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1398 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1399 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1400 }
a331400b 1401 local->ps_sdata = NULL;
ae5eb026 1402
68542962
JO		 1403 /* Disable ARP filtering */
1404 if (sdata->vif.bss_conf.arp_filter_enabled) {
1405 sdata->vif.bss_conf.arp_filter_enabled = false;
1406 changed |= BSS_CHANGED_ARP_FILTER;
1407 }
1408
3abead59
JB		 1409 sdata->vif.bss_conf.qos = false;
1410 changed |= BSS_CHANGED_QOS;
1411
0aaffa9b
JB		 1412 /* The BSSID (not really interesting) and HT changed */
1413 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1414 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1415
3cc5240b
JB		 1416 /* channel(_type) changes are handled by ieee80211_hw_config */
1417 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1418 ieee80211_hw_config(local, 0);
1419
3abead59
JB		 1420 /* disassociated - set to defaults now */
1421 ieee80211_set_wmm_default(sdata, false);
1422
b9dcf712
JB		 1423 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1424 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1425 del_timer_sync(&sdata->u.mgd.timer);
1426 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1427}
f0706e82 1428
3cf335d5
KV		 1429void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1430 struct ieee80211_hdr *hdr)
1431{
1432 /*
1433 * We can postpone the mgd.timer whenever receiving unicast frames
1434 * from AP because we know that the connection is working both ways
1435 * at that time. But multicast frames (and hence also beacons) must
1436 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1437 * data idle periods for sending the periodic probe request to the
1438 * AP we're connected to.
3cf335d5 1439 */
b291ba11
JB		 1440 if (is_multicast_ether_addr(hdr->addr1))
1441 return;
1442
be099e82 1443 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1444}
f0706e82 1445
4e5ff376
FF		 1446static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1447{
1448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1449 struct ieee80211_local *local = sdata->local;
4e5ff376 1450
133d40f9 1451 mutex_lock(&local->mtx);
4e5ff376 1452 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1453 IEEE80211_STA_CONNECTION_POLL))) {
1454 mutex_unlock(&local->mtx);
1455 return;
1456 }
4e5ff376 1457
925e64c3 1458 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1459
1460 mutex_lock(&local->iflist_mtx);
1461 ieee80211_recalc_ps(local, -1);
1462 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1463
1464 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1465 goto out;
4e5ff376
FF		 1466
1467 /*
1468 * We've received a probe response, but are not sure whether
1469 * we have or will be receiving any beacons or data, so let's
1470 * schedule the timers again, just in case.
1471 */
1472 ieee80211_sta_reset_beacon_monitor(sdata);
1473
1474 mod_timer(&ifmgd->conn_mon_timer,
1475 round_jiffies_up(jiffies +
1476 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1477out:
133d40f9 1478 mutex_unlock(&local->mtx);
4e5ff376
FF		 1479}
1480
1481void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1482 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1483{
75706d0e 1484 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1485 return;
1486
04ac3c0e
FF		 1487 if (ack)
1488 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1489
1490 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1491 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1492 if (ack)
1493 sdata->u.mgd.probe_send_count = 0;
1494 else
1495 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1496 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1497 }
1498}
1499
a43abf29
ML		 1500static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1501{
1502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1503 const u8 *ssid;
f01a067d 1504 u8 *dst = ifmgd->associated->bssid;
180205bd 1505 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1506
1507 /*
1508 * Try sending broadcast probe requests for the last three
1509 * probe requests after the first ones failed since some
1510 * buggy APs only support broadcast probe requests.
1511 */
1512 if (ifmgd->probe_send_count >= unicast_limit)
1513 dst = NULL;
a43abf29 1514
4e5ff376
FF		 1515 /*
1516 * When the hardware reports an accurate Tx ACK status, it's
1517 * better to send a nullfunc frame instead of a probe request,
1518 * as it will kick us off the AP quickly if we aren't associated
1519 * anymore. The timeout will be reset if the frame is ACKed by
1520 * the AP.
1521 */
992e68bf
SD		 1522 ifmgd->probe_send_count++;
1523
04ac3c0e
FF		 1524 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1525 ifmgd->nullfunc_failed = false;
4e5ff376 1526 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1527 } else {
88c868c4
SG		 1528 int ssid_len;
1529
4e5ff376 1530 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1531 if (WARN_ON_ONCE(ssid == NULL))
1532 ssid_len = 0;
1533 else
1534 ssid_len = ssid[1];
1535
1536 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1537 0, (u32) -1, true, false);
4e5ff376 1538 }
a43abf29 1539
180205bd 1540 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1541 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1542 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1543 drv_flush(sdata->local, false);
a43abf29
ML		 1544}
1545
b291ba11
JB		 1546static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1547 bool beacon)
04de8381 1548{
04de8381 1549 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1550 bool already = false;
34bfc411 1551
9607e6b6 1552 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1553 return;
1554
77fdaa12
JB		 1555 mutex_lock(&ifmgd->mtx);
1556
1557 if (!ifmgd->associated)
1558 goto out;
1559
133d40f9
SG		 1560 mutex_lock(&sdata->local->mtx);
1561
1562 if (sdata->local->tmp_channel || sdata->local->scanning) {
1563 mutex_unlock(&sdata->local->mtx);
1564 goto out;
1565 }
1566
e87cc472 1567 if (beacon)
bdcbd8e0
JB		 1568 mlme_dbg_ratelimited(sdata,
1569 "detected beacon loss from AP - sending probe request\n");
1570
6efb71b0
HS		 1571 ieee80211_cqm_rssi_notify(&sdata->vif,
1572 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1573
b291ba11
JB		 1574 /*
1575 * The driver/our work has already reported this event or the
1576 * connection monitoring has kicked in and we have already sent
1577 * a probe request. Or maybe the AP died and the driver keeps
1578 * reporting until we disassociate...
1579 *
1580 * In either case we have to ignore the current call to this
1581 * function (except for setting the correct probe reason bit)
1582 * because otherwise we would reset the timer every time and
1583 * never check whether we received a probe response!
1584 */
1585 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1586 IEEE80211_STA_CONNECTION_POLL))
1587 already = true;
1588
1589 if (beacon)
1590 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1591 else
1592 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1593
133d40f9
SG		 1594 mutex_unlock(&sdata->local->mtx);
1595
b291ba11
JB		 1596 if (already)
1597 goto out;
1598
4e751843
JB		 1599 mutex_lock(&sdata->local->iflist_mtx);
1600 ieee80211_recalc_ps(sdata->local, -1);
1601 mutex_unlock(&sdata->local->iflist_mtx);
1602
a43abf29
ML		 1603 ifmgd->probe_send_count = 0;
1604 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1605 out:
1606 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1607}
1608
a619a4c0
JO		 1609struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1610 struct ieee80211_vif *vif)
1611{
1612 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1614 struct sk_buff *skb;
1615 const u8 *ssid;
88c868c4 1616 int ssid_len;
a619a4c0
JO		 1617
1618 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1619 return NULL;
1620
1621 ASSERT_MGD_MTX(ifmgd);
1622
1623 if (!ifmgd->associated)
1624 return NULL;
1625
1626 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1627 if (WARN_ON_ONCE(ssid == NULL))
1628 ssid_len = 0;
1629 else
1630 ssid_len = ssid[1];
1631
a619a4c0 1632 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
88c868c4 1633 (u32) -1, ssid + 2, ssid_len,
85a237fe 1634 NULL, 0, true);
a619a4c0
JO		 1635
1636 return skb;
1637}
1638EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1639
1e4dcd01
JO		 1640static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1641{
1642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1643 struct ieee80211_local *local = sdata->local;
1644 u8 bssid[ETH_ALEN];
5fef7dbc 1645 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1646
1647 mutex_lock(&ifmgd->mtx);
1648 if (!ifmgd->associated) {
1649 mutex_unlock(&ifmgd->mtx);
1650 return;
1651 }
1652
1653 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1654
bdcbd8e0 1655 sdata_info(sdata, "Connection to AP %pM lost\n", bssid);
1e4dcd01 1656
37ad3888
JB		 1657 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1658 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1659 false, frame_buf);
1e4dcd01 1660 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1661
1e4dcd01
JO		 1662 /*
1663 * must be outside lock due to cfg80211,
1664 * but that's not a problem.
1665 */
5fef7dbc 1666 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1667
1668 mutex_lock(&local->mtx);
1669 ieee80211_recalc_idle(local);
1670 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1671}
1672
1673void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1674{
1675 struct ieee80211_sub_if_data *sdata =
1676 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1677 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1679 struct sta_info *sta;
1680
1681 if (ifmgd->associated) {
30fa9047 1682 rcu_read_lock();
a85e1d55
PS		 1683 sta = sta_info_get(sdata, ifmgd->bssid);
1684 if (sta)
1685 sta->beacon_loss_count++;
30fa9047 1686 rcu_read_unlock();
a85e1d55 1687 }
b291ba11 1688
1e4dcd01
JO		 1689 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1690 __ieee80211_connection_loss(sdata);
1691 else
1692 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1693}
1694
04de8381
KV		 1695void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1696{
1697 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1698 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1699
b5878a2d
JB		 1700 trace_api_beacon_loss(sdata);
1701
1e4dcd01
JO		 1702 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1703 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1704}
1705EXPORT_SYMBOL(ieee80211_beacon_loss);
1706
1e4dcd01
JO		 1707void ieee80211_connection_loss(struct ieee80211_vif *vif)
1708{
1709 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1710 struct ieee80211_hw *hw = &sdata->local->hw;
1711
b5878a2d
JB		 1712 trace_api_connection_loss(sdata);
1713
1e4dcd01
JO		 1714 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1715 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1716}
1717EXPORT_SYMBOL(ieee80211_connection_loss);
1718
1719
66e67e41
JB		 1720static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1721 bool assoc)
1722{
1723 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1724
1725 lockdep_assert_held(&sdata->u.mgd.mtx);
1726
66e67e41
JB		 1727 if (!assoc) {
1728 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1729
1730 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1731 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1732 }
1733
1734 cfg80211_put_bss(auth_data->bss);
1735 kfree(auth_data);
1736 sdata->u.mgd.auth_data = NULL;
1737}
1738
1739static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1740 struct ieee80211_mgmt *mgmt, size_t len)
1741{
1742 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1743 u8 *pos;
1744 struct ieee802_11_elems elems;
1745
1746 pos = mgmt->u.auth.variable;
1747 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1748 if (!elems.challenge)
1749 return;
1750 auth_data->expected_transaction = 4;
1751 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1752 elems.challenge - 2, elems.challenge_len + 2,
1753 auth_data->bss->bssid, auth_data->bss->bssid,
1754 auth_data->key, auth_data->key_len,
1755 auth_data->key_idx);
1756}
1757
1758static enum rx_mgmt_action __must_check
1759ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1760 struct ieee80211_mgmt *mgmt, size_t len)
1761{
1762 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1763 u8 bssid[ETH_ALEN];
1764 u16 auth_alg, auth_transaction, status_code;
1765 struct sta_info *sta;
1766
1767 lockdep_assert_held(&ifmgd->mtx);
1768
1769 if (len < 24 + 6)
1770 return RX_MGMT_NONE;
1771
1772 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1773 return RX_MGMT_NONE;
1774
1775 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1776
b203ca39 1777 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1778 return RX_MGMT_NONE;
1779
1780 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1781 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1782 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1783
1784 if (auth_alg != ifmgd->auth_data->algorithm ||
1785 auth_transaction != ifmgd->auth_data->expected_transaction)
1786 return RX_MGMT_NONE;
1787
1788 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1789 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1790 mgmt->sa, status_code);
dac211ec
EP		 1791 ieee80211_destroy_auth_data(sdata, false);
1792 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1793 }
1794
1795 switch (ifmgd->auth_data->algorithm) {
1796 case WLAN_AUTH_OPEN:
1797 case WLAN_AUTH_LEAP:
1798 case WLAN_AUTH_FT:
1799 break;
1800 case WLAN_AUTH_SHARED_KEY:
1801 if (ifmgd->auth_data->expected_transaction != 4) {
1802 ieee80211_auth_challenge(sdata, mgmt, len);
1803 /* need another frame */
1804 return RX_MGMT_NONE;
1805 }
1806 break;
1807 default:
1808 WARN_ONCE(1, "invalid auth alg %d",
1809 ifmgd->auth_data->algorithm);
1810 return RX_MGMT_NONE;
1811 }
1812
bdcbd8e0 1813 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1814 ifmgd->auth_data->done = true;
1815 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1816 run_again(ifmgd, ifmgd->auth_data->timeout);
1817
1818 /* move station state to auth */
1819 mutex_lock(&sdata->local->sta_mtx);
1820 sta = sta_info_get(sdata, bssid);
1821 if (!sta) {
1822 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1823 goto out_err;
1824 }
1825 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1826 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1827 goto out_err;
1828 }
1829 mutex_unlock(&sdata->local->sta_mtx);
1830
1831 return RX_MGMT_CFG80211_RX_AUTH;
1832 out_err:
1833 mutex_unlock(&sdata->local->sta_mtx);
1834 /* ignore frame -- wait for timeout */
1835 return RX_MGMT_NONE;
1836}
1837
1838
77fdaa12
JB		 1839static enum rx_mgmt_action __must_check
1840ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1841 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1842{
46900298 1843 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1844 const u8 *bssid = NULL;
f0706e82
JB		 1845 u16 reason_code;
1846
66e67e41
JB		 1847 lockdep_assert_held(&ifmgd->mtx);
1848
f4ea83dd 1849 if (len < 24 + 2)
77fdaa12 1850 return RX_MGMT_NONE;
f0706e82 1851
66e67e41 1852 if (!ifmgd->associated ||
b203ca39 1853 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1854 return RX_MGMT_NONE;
77fdaa12 1855
0c1ad2ca 1856 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1857
1858 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1859
bdcbd8e0
JB		 1860 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1861 bssid, reason_code);
77fdaa12 1862
37ad3888
JB		 1863 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1864
7da7cc1d 1865 mutex_lock(&sdata->local->mtx);
63f170e0 1866 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1867 mutex_unlock(&sdata->local->mtx);
f0706e82 1868
77fdaa12 1869 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1870}
1871
1872
77fdaa12
JB		 1873static enum rx_mgmt_action __must_check
1874ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1875 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1876{
46900298 1877 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1878 u16 reason_code;
1879
66e67e41 1880 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1881
66e67e41 1882 if (len < 24 + 2)
77fdaa12
JB		 1883 return RX_MGMT_NONE;
1884
66e67e41 1885 if (!ifmgd->associated ||
b203ca39 1886 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1887 return RX_MGMT_NONE;
f0706e82
JB		 1888
1889 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1890
bdcbd8e0
JB		 1891 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1892 mgmt->sa, reason_code);
f0706e82 1893
37ad3888
JB		 1894 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1895
7da7cc1d 1896 mutex_lock(&sdata->local->mtx);
bc83b681 1897 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1898 mutex_unlock(&sdata->local->mtx);
37ad3888 1899
77fdaa12 1900 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1901}
1902
c74d084f
CL		 1903static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1904 u8 *supp_rates, unsigned int supp_rates_len,
1905 u32 *rates, u32 *basic_rates,
1906 bool *have_higher_than_11mbit,
1907 int *min_rate, int *min_rate_index)
1908{
1909 int i, j;
1910
1911 for (i = 0; i < supp_rates_len; i++) {
1912 int rate = (supp_rates[i] & 0x7f) * 5;
1913 bool is_basic = !!(supp_rates[i] & 0x80);
1914
1915 if (rate > 110)
1916 *have_higher_than_11mbit = true;
1917
1918 /*
1919 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1920 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1921 *
1922 * Note: Even through the membership selector and the basic
1923 * rate flag share the same bit, they are not exactly
1924 * the same.
1925 */
1926 if (!!(supp_rates[i] & 0x80) &&
1927 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1928 continue;
1929
1930 for (j = 0; j < sband->n_bitrates; j++) {
1931 if (sband->bitrates[j].bitrate == rate) {
1932 *rates |= BIT(j);
1933 if (is_basic)
1934 *basic_rates |= BIT(j);
1935 if (rate < *min_rate) {
1936 *min_rate = rate;
1937 *min_rate_index = j;
1938 }
1939 break;
1940 }
1941 }
1942 }
1943}
f0706e82 1944
66e67e41
JB		 1945static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1946 bool assoc)
1947{
1948 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1949
1950 lockdep_assert_held(&sdata->u.mgd.mtx);
1951
66e67e41
JB		 1952 if (!assoc) {
1953 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1954
1955 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1956 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1957 }
1958
1959 kfree(assoc_data);
1960 sdata->u.mgd.assoc_data = NULL;
1961}
1962
1963static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1964 struct cfg80211_bss *cbss,
af6b6374 1965 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1966{
46900298 1967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1968 struct ieee80211_local *local = sdata->local;
8318d78a 1969 struct ieee80211_supported_band *sband;
f0706e82 1970 struct sta_info *sta;
af6b6374 1971 u8 *pos;
af6b6374 1972 u16 capab_info, aid;
f0706e82 1973 struct ieee802_11_elems elems;
bda3933a 1974 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1975 u32 changed = 0;
c74d084f 1976 int err;
f0706e82 1977
af6b6374 1978 /* AssocResp and ReassocResp have identical structure */
f0706e82 1979
f0706e82 1980 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1981 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1982
1dd84aa2 1983 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 1984 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
1985 aid);
1dd84aa2
JB		 1986 aid &= ~(BIT(15) | BIT(14));
1987
05cb9108
JB		 1988 ifmgd->broken_ap = false;
1989
1990 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 1991 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
1992 aid);
05cb9108
JB		 1993 aid = 0;
1994 ifmgd->broken_ap = true;
1995 }
1996
af6b6374
JB		 1997 pos = mgmt->u.assoc_resp.variable;
1998 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1999
f0706e82 2000 if (!elems.supp_rates) {
bdcbd8e0 2001 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2002 return false;
f0706e82
JB		 2003 }
2004
46900298 2005 ifmgd->aid = aid;
f0706e82 2006
2a33bee2
GE		 2007 mutex_lock(&sdata->local->sta_mtx);
2008 /*
2009 * station info was already allocated and inserted before
2010 * the association and should be available to us
2011 */
7852e361 2012 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2013 if (WARN_ON(!sta)) {
2014 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2015 return false;
77fdaa12 2016 }
05e5e883 2017
66e67e41 2018 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2019
ab1faead 2020 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2021 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2022 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2023
64f68e5d
JB		 2024 sta->supports_40mhz =
2025 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2026
4b7679a5 2027 rate_control_rate_init(sta);
f0706e82 2028
46900298 2029 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2030 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2031
ddf4ac53 2032 if (elems.wmm_param)
c2c98fde 2033 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2034
c8987876
JB		 2035 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2036 if (!err)
2037 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2038 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2039 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2040 if (err) {
bdcbd8e0
JB		 2041 sdata_info(sdata,
2042 "failed to move station %pM to desired state\n",
2043 sta->sta.addr);
c8987876
JB		 2044 WARN_ON(__sta_info_destroy(sta));
2045 mutex_unlock(&sdata->local->sta_mtx);
2046 return false;
2047 }
2048
7852e361 2049 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2050
f2176d72
JO		 2051 /*
2052 * Always handle WMM once after association regardless
2053 * of the first value the AP uses. Setting -1 here has
2054 * that effect because the AP values is an unsigned
2055 * 4-bit value.
2056 */
2057 ifmgd->wmm_last_param_set = -1;
2058
ddf4ac53 2059 if (elems.wmm_param)
4ced3f74 2060 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2061 elems.wmm_param_len);
aa837e1d 2062 else
3abead59
JB		 2063 ieee80211_set_wmm_default(sdata, false);
2064 changed |= BSS_CHANGED_QOS;
f0706e82 2065
074d46d1 2066 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2067 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2068 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2069 cbss->bssid, false);
ae5eb026 2070
60f8b39c
JB		 2071 /* set AID and assoc capability,
2072 * ieee80211_set_associated() will tell the driver */
2073 bss_conf->aid = aid;
2074 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2075 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2076
d524215f
FF		 2077 /*
2078 * If we're using 4-addr mode, let the AP know that we're
2079 * doing so, so that it can create the STA VLAN on its side
2080 */
2081 if (ifmgd->use_4addr)
2082 ieee80211_send_4addr_nullfunc(local, sdata);
2083
15b7b062 2084 /*
b291ba11
JB		 2085 * Start timer to probe the connection to the AP now.
2086 * Also start the timer that will detect beacon loss.
15b7b062 2087 */
b291ba11 2088 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2089 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2090
af6b6374 2091 return true;
f0706e82
JB		 2092}
2093
66e67e41
JB		 2094static enum rx_mgmt_action __must_check
2095ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2096 struct ieee80211_mgmt *mgmt, size_t len,
2097 struct cfg80211_bss **bss)
2098{
2099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2100 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2101 u16 capab_info, status_code, aid;
2102 struct ieee802_11_elems elems;
2103 u8 *pos;
2104 bool reassoc;
2105
2106 lockdep_assert_held(&ifmgd->mtx);
2107
2108 if (!assoc_data)
2109 return RX_MGMT_NONE;
b203ca39 2110 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2111 return RX_MGMT_NONE;
2112
2113 /*
2114 * AssocResp and ReassocResp have identical structure, so process both
2115 * of them in this function.
2116 */
2117
2118 if (len < 24 + 6)
2119 return RX_MGMT_NONE;
2120
2121 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2122 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2123 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2124 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2125
bdcbd8e0
JB		 2126 sdata_info(sdata,
2127 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2128 reassoc ? "Rea" : "A", mgmt->sa,
2129 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2130
2131 pos = mgmt->u.assoc_resp.variable;
2132 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2133
2134 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2135 elems.timeout_int && elems.timeout_int_len == 5 &&
2136 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2137 u32 tu, ms;
2138 tu = get_unaligned_le32(elems.timeout_int + 1);
2139 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2140 sdata_info(sdata,
2141 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2142 mgmt->sa, tu, ms);
66e67e41
JB		 2143 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2144 if (ms > IEEE80211_ASSOC_TIMEOUT)
2145 run_again(ifmgd, assoc_data->timeout);
2146 return RX_MGMT_NONE;
2147 }
2148
2149 *bss = assoc_data->bss;
2150
2151 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2152 sdata_info(sdata, "%pM denied association (code=%d)\n",
2153 mgmt->sa, status_code);
66e67e41
JB		 2154 ieee80211_destroy_assoc_data(sdata, false);
2155 } else {
bdcbd8e0 2156 sdata_info(sdata, "associated\n");
66e67e41 2157
66e67e41
JB		 2158 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2159 /* oops -- internal error -- send timeout for now */
79ebfb85 2160 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2161 sta_info_destroy_addr(sdata, mgmt->bssid);
2162 cfg80211_put_bss(*bss);
2163 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2164 }
79ebfb85
JB		 2165
2166 /*
2167 * destroy assoc_data afterwards, as otherwise an idle
2168 * recalc after assoc_data is NULL but before associated
2169 * is set can cause the interface to go idle
2170 */
2171 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2172 }
2173
2174 return RX_MGMT_CFG80211_RX_ASSOC;
2175}
98c8fccf
JB		 2176static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2177 struct ieee80211_mgmt *mgmt,
2178 size_t len,
2179 struct ieee80211_rx_status *rx_status,
2180 struct ieee802_11_elems *elems,
2181 bool beacon)
2182{
2183 struct ieee80211_local *local = sdata->local;
2184 int freq;
c2b13452 2185 struct ieee80211_bss *bss;
98c8fccf 2186 struct ieee80211_channel *channel;
56007a02
JB		 2187 bool need_ps = false;
2188
66e67e41 2189 if (sdata->u.mgd.associated &&
b203ca39 2190 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2191 bss = (void *)sdata->u.mgd.associated->priv;
2192 /* not previously set so we may need to recalc */
2193 need_ps = !bss->dtim_period;
2194 }
98c8fccf
JB		 2195
2196 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2197 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2198 rx_status->band);
98c8fccf
JB		 2199 else
2200 freq = rx_status->freq;
2201
2202 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2203
2204 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2205 return;
2206
98c8fccf 2207 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2208 channel, beacon);
77fdaa12
JB		 2209 if (bss)
2210 ieee80211_rx_bss_put(local, bss);
2211
2212 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2213 return;
2214
56007a02
JB		 2215 if (need_ps) {
2216 mutex_lock(&local->iflist_mtx);
2217 ieee80211_recalc_ps(local, -1);
2218 mutex_unlock(&local->iflist_mtx);
2219 }
2220
c481ec97 2221 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2222 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2223 ETH_ALEN) == 0)) {
c481ec97
S		 2224 struct ieee80211_channel_sw_ie *sw_elem =
2225 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2226 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2227 bss, rx_status->mactime);
c481ec97 2228 }
f0706e82
JB		 2229}
2230
2231
f698d856 2232static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2233 struct sk_buff *skb)
f0706e82 2234{
af6b6374 2235 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2236 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2237 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2238 size_t baselen, len = skb->len;
ae6a44e3
EK		 2239 struct ieee802_11_elems elems;
2240
15b7b062
KV		 2241 ifmgd = &sdata->u.mgd;
2242
77fdaa12
JB		 2243 ASSERT_MGD_MTX(ifmgd);
2244
b203ca39 2245 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2246 return; /* ignore ProbeResp to foreign address */
2247
ae6a44e3
EK		 2248 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2249 if (baselen > len)
2250 return;
2251
2252 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2253 &elems);
2254
98c8fccf 2255 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2256
77fdaa12 2257 if (ifmgd->associated &&
b203ca39 2258 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2259 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2260
2261 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2262 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2263 /* got probe response, continue with auth */
bdcbd8e0 2264 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2265 ifmgd->auth_data->tries = 0;
2266 ifmgd->auth_data->timeout = jiffies;
2267 run_again(ifmgd, ifmgd->auth_data->timeout);
2268 }
f0706e82
JB		 2269}
2270
d91f36db
JB		 2271/*
2272 * This is the canonical list of information elements we care about,
2273 * the filter code also gives us all changes to the Microsoft OUI
2274 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2275 *
2276 * We implement beacon filtering in software since that means we can
2277 * avoid processing the frame here and in cfg80211, and userspace
2278 * will not be able to tell whether the hardware supports it or not.
2279 *
2280 * XXX: This list needs to be dynamic -- userspace needs to be able to
2281 * add items it requires. It also needs to be able to tell us to
2282 * look out for other vendor IEs.
2283 */
2284static const u64 care_about_ies =
1d4df3a5
JB		 2285 (1ULL << WLAN_EID_COUNTRY) |
2286 (1ULL << WLAN_EID_ERP_INFO) |
2287 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2288 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2289 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2290 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2291
f698d856 2292static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2293 struct ieee80211_mgmt *mgmt,
2294 size_t len,
2295 struct ieee80211_rx_status *rx_status)
2296{
d91f36db 2297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2298 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2299 size_t baselen;
2300 struct ieee802_11_elems elems;
f698d856 2301 struct ieee80211_local *local = sdata->local;
471b3efd 2302 u32 changed = 0;
d91f36db 2303 bool erp_valid, directed_tim = false;
7a5158ef 2304 u8 erp_value = 0;
d91f36db 2305 u32 ncrc;
77fdaa12
JB		 2306 u8 *bssid;
2307
66e67e41 2308 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2309
ae6a44e3
EK		 2310 /* Process beacon from the current BSS */
2311 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2312 if (baselen > len)
2313 return;
2314
d91f36db 2315 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2316 return;
f0706e82 2317
66e67e41 2318 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2319 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2320 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2321 len - baselen, &elems);
77fdaa12 2322
66e67e41
JB		 2323 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2324 false);
2325 ifmgd->assoc_data->have_beacon = true;
2326 ifmgd->assoc_data->sent_assoc = false;
2327 /* continue assoc process */
2328 ifmgd->assoc_data->timeout = jiffies;
2329 run_again(ifmgd, ifmgd->assoc_data->timeout);
2330 return;
2331 }
77fdaa12 2332
66e67e41 2333 if (!ifmgd->associated ||
b203ca39 2334 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2335 return;
66e67e41 2336 bssid = ifmgd->associated->bssid;
f0706e82 2337
17e4ec14
JM		 2338 /* Track average RSSI from the Beacon frames of the current AP */
2339 ifmgd->last_beacon_signal = rx_status->signal;
2340 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2341 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2342 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2343 ifmgd->last_cqm_event_signal = 0;
391a200a 2344 ifmgd->count_beacon_signal = 1;
615f7b9b 2345 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2346 } else {
2347 ifmgd->ave_beacon_signal =
2348 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2349 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2350 ifmgd->ave_beacon_signal) / 16;
391a200a 2351 ifmgd->count_beacon_signal++;
17e4ec14 2352 }
615f7b9b
MV		 2353
2354 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2355 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2356 int sig = ifmgd->ave_beacon_signal;
2357 int last_sig = ifmgd->last_ave_beacon_signal;
2358
2359 /*
2360 * if signal crosses either of the boundaries, invoke callback
2361 * with appropriate parameters
2362 */
2363 if (sig > ifmgd->rssi_max_thold &&
2364 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2365 ifmgd->last_ave_beacon_signal = sig;
2366 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2367 } else if (sig < ifmgd->rssi_min_thold &&
2368 (last_sig >= ifmgd->rssi_max_thold ||
2369 last_sig == 0)) {
2370 ifmgd->last_ave_beacon_signal = sig;
2371 drv_rssi_callback(local, RSSI_EVENT_LOW);
2372 }
2373 }
2374
17e4ec14 2375 if (bss_conf->cqm_rssi_thold &&
391a200a 2376 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2377 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2378 int sig = ifmgd->ave_beacon_signal / 16;
2379 int last_event = ifmgd->last_cqm_event_signal;
2380 int thold = bss_conf->cqm_rssi_thold;
2381 int hyst = bss_conf->cqm_rssi_hyst;
2382 if (sig < thold &&
2383 (last_event == 0 || sig < last_event - hyst)) {
2384 ifmgd->last_cqm_event_signal = sig;
2385 ieee80211_cqm_rssi_notify(
2386 &sdata->vif,
2387 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2388 GFP_KERNEL);
2389 } else if (sig > thold &&
2390 (last_event == 0 || sig > last_event + hyst)) {
2391 ifmgd->last_cqm_event_signal = sig;
2392 ieee80211_cqm_rssi_notify(
2393 &sdata->vif,
2394 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2395 GFP_KERNEL);
2396 }
2397 }
2398
b291ba11 2399 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2400 mlme_dbg_ratelimited(sdata,
2401 "cancelling probereq poll due to a received beacon\n");
925e64c3 2402 mutex_lock(&local->mtx);
b291ba11 2403 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2404 ieee80211_run_deferred_scan(local);
2405 mutex_unlock(&local->mtx);
2406
4e751843
JB		 2407 mutex_lock(&local->iflist_mtx);
2408 ieee80211_recalc_ps(local, -1);
2409 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2410 }
2411
b291ba11
JB		 2412 /*
2413 * Push the beacon loss detection into the future since
2414 * we are processing a beacon from the AP just now.
2415 */
d3a910a8 2416 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2417
d91f36db
JB		 2418 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2419 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2420 len - baselen, &elems,
2421 care_about_ies, ncrc);
2422
2423 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2424 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2425 ifmgd->aid);
d91f36db 2426
d8ec4433 2427 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2428 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2429 true);
d91f36db 2430
4ced3f74 2431 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2432 elems.wmm_param_len);
2433 }
fe3fa827 2434
25c9c875 2435 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2436 if (directed_tim) {
572e0012 2437 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2438 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2439 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2440 ieee80211_hw_config(local,
2441 IEEE80211_CONF_CHANGE_PS);
2442 }
572e0012 2443 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2444 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2445 local->pspolling = true;
2446
2447 /*
2448 * Here is assumed that the driver will be
2449 * able to send ps-poll frame and receive a
2450 * response even though power save mode is
2451 * enabled, but some drivers might require
2452 * to disable power save here. This needs
2453 * to be investigated.
2454 */
2455 ieee80211_send_pspoll(local, sdata);
2456 }
a97b77b9
VN		 2457 }
2458 }
7a5158ef 2459
d8ec4433 2460 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2461 return;
2462 ifmgd->beacon_crc = ncrc;
d8ec4433 2463 ifmgd->beacon_crc_valid = true;
30196673 2464
7a5158ef
JB		 2465 if (elems.erp_info && elems.erp_info_len >= 1) {
2466 erp_valid = true;
2467 erp_value = elems.erp_info[0];
2468 } else {
2469 erp_valid = false;
50c4afb9 2470 }
7a5158ef
JB		 2471 changed |= ieee80211_handle_bss_capability(sdata,
2472 le16_to_cpu(mgmt->u.beacon.capab_info),
2473 erp_valid, erp_value);
f0706e82 2474
d3c990fb 2475
074d46d1 2476 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2477 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2478 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2479
2480 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2481
24398e39
JB		 2482 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2483 bssid, true);
d3c990fb
RR		 2484 }
2485
8b19e6ca 2486 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2487 if (elems.country_elem) {
a8302de9
VT		 2488 /* TODO: IBSS also needs this */
2489 if (elems.pwr_constr_elem)
2490 ieee80211_handle_pwr_constr(sdata,
2491 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2492 elems.pwr_constr_elem,
2493 elems.pwr_constr_elem_len);
3f2355cb
LR		 2494 }
2495
471b3efd 2496 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2497}
2498
1fa57d01
JB		 2499void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2500 struct sk_buff *skb)
f0706e82 2501{
77fdaa12 2502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2503 struct ieee80211_rx_status *rx_status;
f0706e82 2504 struct ieee80211_mgmt *mgmt;
66e67e41 2505 struct cfg80211_bss *bss = NULL;
77fdaa12 2506 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2507 u16 fc;
2508
f0706e82
JB		 2509 rx_status = (struct ieee80211_rx_status *) skb->cb;
2510 mgmt = (struct ieee80211_mgmt *) skb->data;
2511 fc = le16_to_cpu(mgmt->frame_control);
2512
77fdaa12
JB		 2513 mutex_lock(&ifmgd->mtx);
2514
66e67e41
JB		 2515 switch (fc & IEEE80211_FCTL_STYPE) {
2516 case IEEE80211_STYPE_BEACON:
2517 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2518 break;
2519 case IEEE80211_STYPE_PROBE_RESP:
2520 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2521 break;
2522 case IEEE80211_STYPE_AUTH:
2523 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2524 break;
2525 case IEEE80211_STYPE_DEAUTH:
2526 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2527 break;
2528 case IEEE80211_STYPE_DISASSOC:
2529 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2530 break;
2531 case IEEE80211_STYPE_ASSOC_RESP:
2532 case IEEE80211_STYPE_REASSOC_RESP:
2533 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2534 break;
2535 case IEEE80211_STYPE_ACTION:
2536 switch (mgmt->u.action.category) {
2537 case WLAN_CATEGORY_SPECTRUM_MGMT:
2538 ieee80211_sta_process_chanswitch(sdata,
2539 &mgmt->u.action.u.chan_switch.sw_elem,
2540 (void *)ifmgd->associated->priv,
2541 rx_status->mactime);
77fdaa12 2542 break;
77fdaa12 2543 }
77fdaa12 2544 }
77fdaa12
JB		 2545 mutex_unlock(&ifmgd->mtx);
2546
66e67e41
JB		 2547 switch (rma) {
2548 case RX_MGMT_NONE:
2549 /* no action */
2550 break;
2551 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2552 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2553 break;
2554 case RX_MGMT_CFG80211_DISASSOC:
2555 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2556 break;
2557 case RX_MGMT_CFG80211_RX_AUTH:
2558 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2559 break;
2560 case RX_MGMT_CFG80211_RX_ASSOC:
2561 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2562 break;
2563 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2564 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2565 break;
2566 default:
2567 WARN(1, "unexpected: %d", rma);
b054b747 2568 }
f0706e82
JB		 2569}
2570
9c6bd790 2571static void ieee80211_sta_timer(unsigned long data)
f0706e82 2572{
60f8b39c
JB		 2573 struct ieee80211_sub_if_data *sdata =
2574 (struct ieee80211_sub_if_data *) data;
46900298 2575 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2576 struct ieee80211_local *local = sdata->local;
f0706e82 2577
5bb644a0
JB		 2578 if (local->quiescing) {
2579 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2580 return;
2581 }
2582
64592c8f 2583 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2584}
2585
04ac3c0e 2586static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2587 u8 *bssid, u8 reason)
04ac3c0e
FF		 2588{
2589 struct ieee80211_local *local = sdata->local;
2590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2591 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2592
37ad3888
JB		 2593 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2594 false, frame_buf);
04ac3c0e 2595 mutex_unlock(&ifmgd->mtx);
37ad3888 2596
04ac3c0e
FF		 2597 /*
2598 * must be outside lock due to cfg80211,
2599 * but that's not a problem.
2600 */
5fef7dbc 2601 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2602
2603 mutex_lock(&local->mtx);
2604 ieee80211_recalc_idle(local);
2605 mutex_unlock(&local->mtx);
2606
04ac3c0e
FF		 2607 mutex_lock(&ifmgd->mtx);
2608}
2609
66e67e41
JB		 2610static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2611{
2612 struct ieee80211_local *local = sdata->local;
2613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2614 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2615
2616 lockdep_assert_held(&ifmgd->mtx);
2617
2618 if (WARN_ON_ONCE(!auth_data))
2619 return -EINVAL;
2620
66e67e41
JB		 2621 auth_data->tries++;
2622
2623 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2624 sdata_info(sdata, "authentication with %pM timed out\n",
2625 auth_data->bss->bssid);
66e67e41
JB		 2626
2627 /*
2628 * Most likely AP is not in the range so remove the
2629 * bss struct for that AP.
2630 */
2631 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2632
2633 return -ETIMEDOUT;
2634 }
2635
2636 if (auth_data->bss->proberesp_ies) {
bdcbd8e0
JB		 2637 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2638 auth_data->bss->bssid, auth_data->tries,
2639 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2640
2641 auth_data->expected_transaction = 2;
2642 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2643 auth_data->ie, auth_data->ie_len,
2644 auth_data->bss->bssid,
2645 auth_data->bss->bssid, NULL, 0, 0);
2646 } else {
2647 const u8 *ssidie;
2648
bdcbd8e0
JB		 2649 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2650 auth_data->bss->bssid, auth_data->tries,
2651 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2652
2653 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2654 if (!ssidie)
2655 return -EINVAL;
2656 /*
2657 * Direct probe is sent to broadcast address as some APs
2658 * will not answer to direct packet in unassociated state.
2659 */
2660 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2661 NULL, 0, (u32) -1, true, false);
2662 }
2663
2664 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2665 run_again(ifmgd, auth_data->timeout);
2666
2667 return 0;
2668}
2669
2670static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2671{
2672 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2673 struct ieee80211_local *local = sdata->local;
2674
2675 lockdep_assert_held(&sdata->u.mgd.mtx);
2676
66e67e41
JB		 2677 assoc_data->tries++;
2678 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2679 sdata_info(sdata, "association with %pM timed out\n",
2680 assoc_data->bss->bssid);
66e67e41
JB		 2681
2682 /*
2683 * Most likely AP is not in the range so remove the
2684 * bss struct for that AP.
2685 */
2686 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2687
2688 return -ETIMEDOUT;
2689 }
2690
bdcbd8e0
JB		 2691 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2692 assoc_data->bss->bssid, assoc_data->tries,
2693 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2694 ieee80211_send_assoc(sdata);
2695
2696 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2697 run_again(&sdata->u.mgd, assoc_data->timeout);
2698
2699 return 0;
2700}
2701
1fa57d01 2702void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2703{
9c6bd790 2704 struct ieee80211_local *local = sdata->local;
1fa57d01 2705 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2706
77fdaa12
JB		 2707 mutex_lock(&ifmgd->mtx);
2708
66e67e41
JB		 2709 if (ifmgd->auth_data &&
2710 time_after(jiffies, ifmgd->auth_data->timeout)) {
2711 if (ifmgd->auth_data->done) {
2712 /*
2713 * ok ... we waited for assoc but userspace didn't,
2714 * so let's just kill the auth data
2715 */
2716 ieee80211_destroy_auth_data(sdata, false);
2717 } else if (ieee80211_probe_auth(sdata)) {
2718 u8 bssid[ETH_ALEN];
2719
2720 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2721
2722 ieee80211_destroy_auth_data(sdata, false);
2723
2724 mutex_unlock(&ifmgd->mtx);
2725 cfg80211_send_auth_timeout(sdata->dev, bssid);
2726 mutex_lock(&ifmgd->mtx);
2727 }
2728 } else if (ifmgd->auth_data)
2729 run_again(ifmgd, ifmgd->auth_data->timeout);
2730
2731 if (ifmgd->assoc_data &&
2732 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2733 if (!ifmgd->assoc_data->have_beacon ||
2734 ieee80211_do_assoc(sdata)) {
2735 u8 bssid[ETH_ALEN];
2736
2737 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2738
2739 ieee80211_destroy_assoc_data(sdata, false);
2740
2741 mutex_unlock(&ifmgd->mtx);
2742 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2743 mutex_lock(&ifmgd->mtx);
2744 }
2745 } else if (ifmgd->assoc_data)
2746 run_again(ifmgd, ifmgd->assoc_data->timeout);
2747
b291ba11
JB		 2748 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2749 IEEE80211_STA_CONNECTION_POLL) &&
2750 ifmgd->associated) {
a43abf29 2751 u8 bssid[ETH_ALEN];
72a8a3ed 2752 int max_tries;
a43abf29 2753
0c1ad2ca 2754 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2755
72a8a3ed 2756 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2757 max_tries = max_nullfunc_tries;
72a8a3ed 2758 else
180205bd 2759 max_tries = max_probe_tries;
72a8a3ed 2760
4e5ff376
FF		 2761 /* ACK received for nullfunc probing frame */
2762 if (!ifmgd->probe_send_count)
2763 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2764 else if (ifmgd->nullfunc_failed) {
2765 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2766 mlme_dbg(sdata,
2767 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2768 bssid, ifmgd->probe_send_count,
2769 max_tries);
04ac3c0e
FF		 2770 ieee80211_mgd_probe_ap_send(sdata);
2771 } else {
bdcbd8e0
JB		 2772 mlme_dbg(sdata,
2773 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2774 bssid);
95acac61
JB		 2775 ieee80211_sta_connection_lost(sdata, bssid,
2776 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2777 }
2778 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2779 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2780 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2781 mlme_dbg(sdata,
2782 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2783 bssid, probe_wait_ms);
95acac61
JB		 2784 ieee80211_sta_connection_lost(sdata, bssid,
2785 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2786 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2787 mlme_dbg(sdata,
2788 "No probe response from AP %pM after %dms, try %d/%i\n",
2789 bssid, probe_wait_ms,
2790 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2791 ieee80211_mgd_probe_ap_send(sdata);
2792 } else {
b291ba11
JB		 2793 /*
2794 * We actually lost the connection ... or did we?
2795 * Let's make sure!
2796 */
b38afa87
BG		 2797 wiphy_debug(local->hw.wiphy,
2798 "%s: No probe response from AP %pM"
2799 " after %dms, disconnecting.\n",
2800 sdata->name,
180205bd 2801 bssid, probe_wait_ms);
04ac3c0e 2802
95acac61
JB		 2803 ieee80211_sta_connection_lost(sdata, bssid,
2804 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2805 }
2806 }
2807
77fdaa12 2808 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2809
2810 mutex_lock(&local->mtx);
2811 ieee80211_recalc_idle(local);
2812 mutex_unlock(&local->mtx);
f0706e82
JB		 2813}
2814
b291ba11
JB		 2815static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2816{
2817 struct ieee80211_sub_if_data *sdata =
2818 (struct ieee80211_sub_if_data *) data;
2819 struct ieee80211_local *local = sdata->local;
2820
2821 if (local->quiescing)
2822 return;
2823
1e4dcd01
JO		 2824 ieee80211_queue_work(&sdata->local->hw,
2825 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2826}
2827
2828static void ieee80211_sta_conn_mon_timer(unsigned long data)
2829{
2830 struct ieee80211_sub_if_data *sdata =
2831 (struct ieee80211_sub_if_data *) data;
2832 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2833 struct ieee80211_local *local = sdata->local;
2834
2835 if (local->quiescing)
2836 return;
2837
42935eca 2838 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2839}
2840
2841static void ieee80211_sta_monitor_work(struct work_struct *work)
2842{
2843 struct ieee80211_sub_if_data *sdata =
2844 container_of(work, struct ieee80211_sub_if_data,
2845 u.mgd.monitor_work);
2846
2847 ieee80211_mgd_probe_ap(sdata, false);
2848}
2849
9c6bd790
JB		 2850static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2851{
494f1fe5
EP		 2852 u32 flags;
2853
ad935687 2854 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2855 __ieee80211_stop_poll(sdata);
ad935687 2856
b291ba11 2857 /* let's probe the connection once */
494f1fe5
EP		 2858 flags = sdata->local->hw.flags;
2859 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2860 ieee80211_queue_work(&sdata->local->hw,
2861 &sdata->u.mgd.monitor_work);
b291ba11 2862 /* and do all the other regular work too */
64592c8f 2863 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2864 }
9c6bd790 2865}
f0706e82 2866
5bb644a0
JB		 2867#ifdef CONFIG_PM
2868void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2869{
2870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2871
2872 /*
2873 * we need to use atomic bitops for the running bits
2874 * only because both timers might fire at the same
2875 * time -- the code here is properly synchronised.
2876 */
2877
d1f5b7a3
JB		 2878 cancel_work_sync(&ifmgd->request_smps_work);
2879
0ecfe806 2880 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2881 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2882 if (del_timer_sync(&ifmgd->timer))
2883 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2884
2885 cancel_work_sync(&ifmgd->chswitch_work);
2886 if (del_timer_sync(&ifmgd->chswitch_timer))
2887 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2888
b291ba11
JB		 2889 /* these will just be re-established on connection */
2890 del_timer_sync(&ifmgd->conn_mon_timer);
2891 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2892}
2893
2894void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2895{
2896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2897
676b58c2
RM		 2898 if (!ifmgd->associated)
2899 return;
2900
95acac61
JB		 2901 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2902 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2903 mutex_lock(&ifmgd->mtx);
2904 if (ifmgd->associated) {
bdcbd8e0
JB		 2905 mlme_dbg(sdata,
2906 "driver requested disconnect after resume\n");
95acac61
JB		 2907 ieee80211_sta_connection_lost(sdata,
2908 ifmgd->associated->bssid,
2909 WLAN_REASON_UNSPECIFIED);
2910 mutex_unlock(&ifmgd->mtx);
2911 return;
2912 }
2913 mutex_unlock(&ifmgd->mtx);
2914 }
2915
5bb644a0
JB		 2916 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2917 add_timer(&ifmgd->timer);
2918 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2919 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2920 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2921
2922 mutex_lock(&sdata->local->mtx);
46090979 2923 ieee80211_restart_sta_timer(sdata);
925e64c3 2924 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2925}
2926#endif
2927
9c6bd790
JB		 2928/* interface setup */
2929void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2930{
46900298 2931 struct ieee80211_if_managed *ifmgd;
988c0f72 2932
46900298 2933 ifmgd = &sdata->u.mgd;
b291ba11 2934 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2935 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2936 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2937 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2938 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2939 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2940 (unsigned long) sdata);
b291ba11
JB		 2941 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2942 (unsigned long) sdata);
2943 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2944 (unsigned long) sdata);
46900298 2945 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2946 (unsigned long) sdata);
9c6bd790 2947
ab1faead 2948 ifmgd->flags = 0;
1478acb3 2949 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2950 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2951 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2952
77fdaa12 2953 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2954
2955 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2956 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2957 else
2958 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2959}
2960
77fdaa12
JB		 2961/* scan finished notification */
2962void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2963{
77fdaa12 2964 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2965
77fdaa12
JB		 2966 /* Restart STA timers */
2967 rcu_read_lock();
2968 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2969 ieee80211_restart_sta_timer(sdata);
2970 rcu_read_unlock();
2971}
60f8b39c 2972
77fdaa12
JB		 2973int ieee80211_max_network_latency(struct notifier_block *nb,
2974 unsigned long data, void *dummy)
2975{
2976 s32 latency_usec = (s32) data;
2977 struct ieee80211_local *local =
2978 container_of(nb, struct ieee80211_local,
2979 network_latency_notifier);
1fa6f4af 2980
77fdaa12
JB		 2981 mutex_lock(&local->iflist_mtx);
2982 ieee80211_recalc_ps(local, latency_usec);
2983 mutex_unlock(&local->iflist_mtx);
dfe67012 2984
77fdaa12 2985 return 0;
9c6bd790
JB		 2986}
2987
a1cf775d 2988static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 2989 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 2990{
2991 struct ieee80211_local *local = sdata->local;
2992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 2993 struct ieee80211_bss *bss = (void *)cbss->priv;
6df653c7 2994 struct sta_info *sta = NULL;
a1cf775d
JB		 2995 bool have_sta = false;
2996 int err;
24398e39
JB		 2997 int ht_cfreq;
2998 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2999 const u8 *ht_oper_ie;
3000 const struct ieee80211_ht_operation *ht_oper = NULL;
3001 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3002
3003 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3004 return -EINVAL;
3005
3006 if (assoc) {
3007 rcu_read_lock();
5d6a1b06 3008 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3009 rcu_read_unlock();
3010 }
3011
3012 if (!have_sta) {
5d6a1b06 3013 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3014 if (!sta)
3015 return -ENOMEM;
3016 }
3017
3018 mutex_lock(&local->mtx);
3019 ieee80211_recalc_idle(sdata->local);
3020 mutex_unlock(&local->mtx);
3021
3022 /* switch to the right channel */
24398e39
JB		 3023 sband = local->hw.wiphy->bands[cbss->channel->band];
3024
3025 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3026
3027 if (sband->ht_cap.ht_supported) {
3028 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3029 cbss->information_elements,
3030 cbss->len_information_elements);
3031 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3032 ht_oper = (void *)(ht_oper_ie + 2);
3033 }
3034
3035 if (ht_oper) {
3036 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3037 cbss->channel->band);
3038 /* check that channel matches the right operating channel */
3039 if (cbss->channel->center_freq != ht_cfreq) {
3040 /*
3041 * It's possible that some APs are confused here;
3042 * Netgear WNDR3700 sometimes reports 4 higher than
3043 * the actual channel in association responses, but
3044 * since we look at probe response/beacon data here
3045 * it should be OK.
3046 */
bdcbd8e0
JB		 3047 sdata_info(sdata,
3048 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3049 cbss->channel->center_freq,
3050 ht_cfreq, ht_oper->primary_chan,
3051 cbss->channel->band);
24398e39
JB		 3052 ht_oper = NULL;
3053 }
3054 }
3055
3056 if (ht_oper) {
3057 channel_type = NL80211_CHAN_HT20;
3058
3059 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3060 switch (ht_oper->ht_param &
3061 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3062 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3063 channel_type = NL80211_CHAN_HT40PLUS;
3064 break;
3065 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3066 channel_type = NL80211_CHAN_HT40MINUS;
3067 break;
3068 }
3069 }
3070 }
3071
3072 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3073 /* can only fail due to HT40+/- mismatch */
3074 channel_type = NL80211_CHAN_HT20;
bdcbd8e0
JB		 3075 sdata_info(sdata,
3076 "disabling 40 MHz due to multi-vif mismatch\n");
24398e39
JB		 3077 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3078 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3079 channel_type));
3080 }
3081
5d6a1b06 3082 local->oper_channel = cbss->channel;
6aee4ca3 3083 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
a1cf775d 3084
6df653c7 3085 if (sta) {
5d6a1b06
JB		 3086 u32 rates = 0, basic_rates = 0;
3087 bool have_higher_than_11mbit;
3088 int min_rate = INT_MAX, min_rate_index = -1;
3089
5d6a1b06
JB		 3090 ieee80211_get_rates(sband, bss->supp_rates,
3091 bss->supp_rates_len,
3092 &rates, &basic_rates,
3093 &have_higher_than_11mbit,
3094 &min_rate, &min_rate_index);
3095
3096 /*
3097 * This used to be a workaround for basic rates missing
3098 * in the association response frame. Now that we no
3099 * longer use the basic rates from there, it probably
3100 * doesn't happen any more, but keep the workaround so
3101 * in case some *other* APs are buggy in different ways
3102 * we can connect -- with a warning.
3103 */
3104 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3105 sdata_info(sdata,
3106 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3107 basic_rates = BIT(min_rate_index);
3108 }
3109
3110 sta->sta.supp_rates[cbss->channel->band] = rates;
3111 sdata->vif.bss_conf.basic_rates = basic_rates;
3112
3113 /* cf. IEEE 802.11 9.2.12 */
3114 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3115 have_higher_than_11mbit)
3116 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3117 else
3118 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3119
3120 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3121
3122 /* tell driver about BSSID and basic rates */
3123 ieee80211_bss_info_change_notify(sdata,
3124 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3125
3126 if (assoc)
3127 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3128
3129 err = sta_info_insert(sta);
3130 sta = NULL;
3131 if (err) {
bdcbd8e0
JB		 3132 sdata_info(sdata,
3133 "failed to insert STA entry for the AP (error %d)\n",
3134 err);
a1cf775d
JB		 3135 return err;
3136 }
3137 } else
b203ca39 3138 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3139
3140 return 0;
3141}
3142
77fdaa12
JB		 3143/* config hooks */
3144int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3145 struct cfg80211_auth_request *req)
9c6bd790 3146{
66e67e41
JB		 3147 struct ieee80211_local *local = sdata->local;
3148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3149 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3150 u16 auth_alg;
66e67e41
JB		 3151 int err;
3152
3153 /* prepare auth data structure */
9c6bd790 3154
77fdaa12
JB		 3155 switch (req->auth_type) {
3156 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3157 auth_alg = WLAN_AUTH_OPEN;
3158 break;
3159 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3160 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3161 return -EOPNOTSUPP;
77fdaa12
JB		 3162 auth_alg = WLAN_AUTH_SHARED_KEY;
3163 break;
3164 case NL80211_AUTHTYPE_FT:
3165 auth_alg = WLAN_AUTH_FT;
3166 break;
3167 case NL80211_AUTHTYPE_NETWORK_EAP:
3168 auth_alg = WLAN_AUTH_LEAP;
3169 break;
3170 default:
3171 return -EOPNOTSUPP;
60f8b39c 3172 }
77fdaa12 3173
66e67e41
JB		 3174 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3175 if (!auth_data)
9c6bd790 3176 return -ENOMEM;
77fdaa12 3177
66e67e41 3178 auth_data->bss = req->bss;
77fdaa12
JB		 3179
3180 if (req->ie && req->ie_len) {
66e67e41
JB		 3181 memcpy(auth_data->ie, req->ie, req->ie_len);
3182 auth_data->ie_len = req->ie_len;
9c6bd790 3183 }
77fdaa12 3184
fffd0934 3185 if (req->key && req->key_len) {
66e67e41
JB		 3186 auth_data->key_len = req->key_len;
3187 auth_data->key_idx = req->key_idx;
3188 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3189 }
3190
66e67e41 3191 auth_data->algorithm = auth_alg;
60f8b39c 3192
66e67e41 3193 /* try to authenticate/probe */
2a33bee2 3194
66e67e41 3195 mutex_lock(&ifmgd->mtx);
2a33bee2 3196
66e67e41
JB		 3197 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3198 ifmgd->assoc_data) {
3199 err = -EBUSY;
3200 goto err_free;
2a33bee2
GE		 3201 }
3202
66e67e41
JB		 3203 if (ifmgd->auth_data)
3204 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3205
66e67e41
JB		 3206 /* prep auth_data so we don't go into idle on disassoc */
3207 ifmgd->auth_data = auth_data;
af6b6374 3208
66e67e41 3209 if (ifmgd->associated)
37ad3888 3210 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3211
bdcbd8e0 3212 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3213
a1cf775d
JB		 3214 err = ieee80211_prep_connection(sdata, req->bss, false);
3215 if (err)
66e67e41 3216 goto err_clear;
af6b6374 3217
66e67e41
JB		 3218 err = ieee80211_probe_auth(sdata);
3219 if (err) {
66e67e41
JB		 3220 sta_info_destroy_addr(sdata, req->bss->bssid);
3221 goto err_clear;
3222 }
3223
3224 /* hold our own reference */
3225 cfg80211_ref_bss(auth_data->bss);
3226 err = 0;
3227 goto out_unlock;
3228
3229 err_clear:
3230 ifmgd->auth_data = NULL;
3231 err_free:
3232 kfree(auth_data);
3233 out_unlock:
3234 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3235
66e67e41 3236 return err;
af6b6374
JB		 3237}
3238
77fdaa12
JB		 3239int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3240 struct cfg80211_assoc_request *req)
f0706e82 3241{
66e67e41 3242 struct ieee80211_local *local = sdata->local;
77fdaa12 3243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3244 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3245 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3246 struct ieee80211_supported_band *sband;
9dde6423 3247 const u8 *ssidie, *ht_ie;
2a33bee2 3248 int i, err;
f0706e82 3249
66e67e41
JB		 3250 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3251 if (!ssidie)
3252 return -EINVAL;
3253
3254 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3255 if (!assoc_data)
3256 return -ENOMEM;
3257
77fdaa12 3258 mutex_lock(&ifmgd->mtx);
9c87ba67 3259
66e67e41 3260 if (ifmgd->associated)
37ad3888 3261 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3262
3263 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3264 err = -EBUSY;
3265 goto err_free;
af6b6374 3266 }
77fdaa12 3267
66e67e41
JB		 3268 if (ifmgd->assoc_data) {
3269 err = -EBUSY;
3270 goto err_free;
3271 }
77fdaa12 3272
66e67e41
JB		 3273 if (ifmgd->auth_data) {
3274 bool match;
3275
3276 /* keep sta info, bssid if matching */
b203ca39 3277 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3278 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3279 }
3280
66e67e41
JB		 3281 /* prepare assoc data */
3282
77fdaa12 3283 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3284 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3285
d8ec4433
JO		 3286 ifmgd->beacon_crc_valid = false;
3287
de5036aa
JB		 3288 /*
3289 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3290 * We still associate in non-HT mode (11a/b/g) if any one of these
3291 * ciphers is configured as pairwise.
3292 * We can set this to true for non-11n hardware, that'll be checked
3293 * separately along with the peer capabilities.
3294 */
1c4cb928 3295 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3296 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3297 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3298 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3299 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3300 netdev_info(sdata->dev,
3301 "disabling HT due to WEP/TKIP use\n");
3302 }
3303 }
77fdaa12 3304
ef96a842
BG		 3305 if (req->flags & ASSOC_REQ_DISABLE_HT)
3306 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3307
4e74bfdb
JB		 3308 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3309 sband = local->hw.wiphy->bands[req->bss->channel->band];
3310 if (!sband->ht_cap.ht_supported ||
1c4cb928 3311 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3312 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3313 netdev_info(sdata->dev,
3314 "disabling HT as WMM/QoS is not supported\n");
3315 }
4e74bfdb 3316
ef96a842
BG		 3317 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3318 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3319 sizeof(ifmgd->ht_capa_mask));
3320
77fdaa12 3321 if (req->ie && req->ie_len) {
66e67e41
JB		 3322 memcpy(assoc_data->ie, req->ie, req->ie_len);
3323 assoc_data->ie_len = req->ie_len;
3324 }
f679f65d 3325
66e67e41 3326 assoc_data->bss = req->bss;
f679f65d 3327
af6b6374
JB		 3328 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3329 if (ifmgd->powersave)
3330 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3331 else
3332 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3333 } else
3334 ifmgd->ap_smps = ifmgd->req_smps;
3335
66e67e41 3336 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3337 assoc_data->wmm = bss->wmm_used &&
3338 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3339 assoc_data->supp_rates = bss->supp_rates;
3340 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3341
3342 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3343 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3344 assoc_data->ap_ht_param =
3345 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3346 else
3347 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3348
ab13315a
KV		 3349 if (bss->wmm_used && bss->uapsd_supported &&
3350 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3351 assoc_data->uapsd = true;
ab13315a
KV		 3352 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3353 } else {
76f0303d 3354 assoc_data->uapsd = false;
ab13315a
KV		 3355 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3356 }
3357
66e67e41
JB		 3358 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3359 assoc_data->ssid_len = ssidie[1];
63f170e0 3360
77fdaa12 3361 if (req->prev_bssid)
66e67e41 3362 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3363
3364 if (req->use_mfp) {
3365 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3366 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3367 } else {
3368 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3369 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3370 }
3371
3372 if (req->crypto.control_port)
3373 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3374 else
3375 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3376
a621fa4d
JB		 3377 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3378 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3379
66e67e41
JB		 3380 /* kick off associate process */
3381
3382 ifmgd->assoc_data = assoc_data;
3383
a1cf775d
JB		 3384 err = ieee80211_prep_connection(sdata, req->bss, true);
3385 if (err)
3386 goto err_clear;
66e67e41
JB		 3387
3388 if (!bss->dtim_period &&
3389 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3390 /*
3391 * Wait up to one beacon interval ...
3392 * should this be more if we miss one?
3393 */
bdcbd8e0
JB		 3394 sdata_info(sdata, "waiting for beacon from %pM\n",
3395 ifmgd->bssid);
3f9768a5 3396 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3397 } else {
3398 assoc_data->have_beacon = true;
3399 assoc_data->sent_assoc = false;
3400 assoc_data->timeout = jiffies;
3401 }
3402 run_again(ifmgd, assoc_data->timeout);
3403
fcff4f10
PS		 3404 if (bss->corrupt_data) {
3405 char *corrupt_type = "data";
3406 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3407 if (bss->corrupt_data &
3408 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3409 corrupt_type = "beacon and probe response";
3410 else
3411 corrupt_type = "beacon";
3412 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3413 corrupt_type = "probe response";
bdcbd8e0
JB		 3414 sdata_info(sdata, "associating with AP with corrupt %s\n",
3415 corrupt_type);
fcff4f10
PS		 3416 }
3417
66e67e41
JB		 3418 err = 0;
3419 goto out;
3420 err_clear:
3421 ifmgd->assoc_data = NULL;
3422 err_free:
3423 kfree(assoc_data);
3424 out:
3425 mutex_unlock(&ifmgd->mtx);
3426
3427 return err;
f0706e82
JB		 3428}
3429
77fdaa12 3430int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3431 struct cfg80211_deauth_request *req)
f0706e82 3432{
46900298 3433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3434 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3435
77fdaa12
JB		 3436 mutex_lock(&ifmgd->mtx);
3437
37ad3888 3438 if (ifmgd->auth_data) {
66e67e41 3439 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3440 mutex_unlock(&ifmgd->mtx);
66e67e41 3441 return 0;
af6b6374 3442 }
77fdaa12 3443
bdcbd8e0
JB		 3444 sdata_info(sdata,
3445 "deauthenticating from %pM by local choice (reason=%d)\n",
3446 req->bssid, req->reason_code);
0ff71613 3447
37ad3888 3448 if (ifmgd->associated &&
b203ca39 3449 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
37ad3888 3450 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3451 req->reason_code, true, frame_buf);
37ad3888
JB		 3452 else
3453 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3454 IEEE80211_STYPE_DEAUTH,
3455 req->reason_code, true,
3456 frame_buf);
3457 mutex_unlock(&ifmgd->mtx);
3458
5fef7dbc 3459 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3460
7da7cc1d 3461 mutex_lock(&sdata->local->mtx);
bc83b681 3462 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3463 mutex_unlock(&sdata->local->mtx);
bc83b681 3464
f0706e82
JB		 3465 return 0;
3466}
84363e6e 3467
77fdaa12 3468int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3469 struct cfg80211_disassoc_request *req)
9c6bd790 3470{
77fdaa12 3471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3472 u8 bssid[ETH_ALEN];
5fef7dbc 3473 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3474
77fdaa12 3475 mutex_lock(&ifmgd->mtx);
10f644a4 3476
8d8b261a
JB		 3477 /*
3478 * cfg80211 should catch this ... but it's racy since
3479 * we can receive a disassoc frame, process it, hand it
3480 * to cfg80211 while that's in a locked section already
3481 * trying to tell us that the user wants to disconnect.
3482 */
0c1ad2ca 3483 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3484 mutex_unlock(&ifmgd->mtx);
3485 return -ENOLINK;
3486 }
3487
bdcbd8e0
JB		 3488 sdata_info(sdata,
3489 "disassociating from %pM by local choice (reason=%d)\n",
3490 req->bss->bssid, req->reason_code);
0ff71613 3491
e69e95db 3492 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3493 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3494 req->reason_code, !req->local_state_change,
3495 frame_buf);
77fdaa12 3496 mutex_unlock(&ifmgd->mtx);
10f644a4 3497
5fef7dbc 3498 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3499
7da7cc1d 3500 mutex_lock(&sdata->local->mtx);
bc83b681 3501 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3502 mutex_unlock(&sdata->local->mtx);
bc83b681 3503
10f644a4
JB		 3504 return 0;
3505}
026331c4 3506
afa762f6 3507void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3508{
3509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3510
3511 mutex_lock(&ifmgd->mtx);
3512 if (ifmgd->assoc_data)
3513 ieee80211_destroy_assoc_data(sdata, false);
3514 if (ifmgd->auth_data)
3515 ieee80211_destroy_auth_data(sdata, false);
3516 del_timer_sync(&ifmgd->timer);
3517 mutex_unlock(&ifmgd->mtx);
3518}
3519
a97c13c3
JO		 3520void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3521 enum nl80211_cqm_rssi_threshold_event rssi_event,
3522 gfp_t gfp)
3523{
3524 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3525
b5878a2d
JB		 3526 trace_api_cqm_rssi_notify(sdata, rssi_event);
3527
a97c13c3
JO		 3528 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3529}
3530EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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