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Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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,
074d46d1 261 struct sk_buff *skb, const u8 *ht_oper_ie,
66e67e41
JB		 262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
265{
074d46d1 266 struct ieee80211_ht_operation *ht_oper;
66e67e41
JB		 267 u8 *pos;
268 u32 flags = channel->flags;
269 u16 cap;
270 struct ieee80211_sta_ht_cap ht_cap;
271
272 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
273
074d46d1 274 if (!ht_oper_ie)
66e67e41
JB		 275 return;
276
074d46d1 277 if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation))
66e67e41
JB		 278 return;
279
280 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
281 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
282
074d46d1 283 ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2);
66e67e41
JB		 284
285 /* determine capability flags */
286 cap = ht_cap.cap;
287
074d46d1 288 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 289 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
290 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
291 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
292 cap &= ~IEEE80211_HT_CAP_SGI_40;
293 }
294 break;
295 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
296 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
297 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
298 cap &= ~IEEE80211_HT_CAP_SGI_40;
299 }
300 break;
301 }
302
24398e39
JB		 303 /*
304 * If 40 MHz was disabled associate as though we weren't
305 * capable of 40 MHz -- some broken APs will never fall
306 * back to trying to transmit in 20 MHz.
307 */
308 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
309 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
310 cap &= ~IEEE80211_HT_CAP_SGI_40;
311 }
312
66e67e41
JB		 313 /* set SM PS mode properly */
314 cap &= ~IEEE80211_HT_CAP_SM_PS;
315 switch (smps) {
316 case IEEE80211_SMPS_AUTOMATIC:
317 case IEEE80211_SMPS_NUM_MODES:
318 WARN_ON(1);
319 case IEEE80211_SMPS_OFF:
320 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
321 IEEE80211_HT_CAP_SM_PS_SHIFT;
322 break;
323 case IEEE80211_SMPS_STATIC:
324 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
326 break;
327 case IEEE80211_SMPS_DYNAMIC:
328 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
330 break;
331 }
332
333 /* reserve and fill IE */
334 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
335 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
336}
337
338static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
339{
340 struct ieee80211_local *local = sdata->local;
341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
342 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
343 struct sk_buff *skb;
344 struct ieee80211_mgmt *mgmt;
345 u8 *pos, qos_info;
346 size_t offset = 0, noffset;
347 int i, count, rates_len, supp_rates_len;
348 u16 capab;
349 struct ieee80211_supported_band *sband;
350 u32 rates = 0;
66e67e41
JB		 351
352 lockdep_assert_held(&ifmgd->mtx);
353
354 sband = local->hw.wiphy->bands[local->oper_channel->band];
355
356 if (assoc_data->supp_rates_len) {
357 /*
358 * Get all rates supported by the device and the AP as
359 * some APs don't like getting a superset of their rates
360 * in the association request (e.g. D-Link DAP 1353 in
361 * b-only mode)...
362 */
363 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
364 assoc_data->supp_rates_len,
365 sband, &rates);
366 } else {
367 /*
368 * In case AP not provide any supported rates information
369 * before association, we send information element(s) with
370 * all rates that we support.
371 */
372 rates = ~0;
373 rates_len = sband->n_bitrates;
374 }
375
376 skb = alloc_skb(local->hw.extra_tx_headroom +
377 sizeof(*mgmt) + /* bit too much but doesn't matter */
378 2 + assoc_data->ssid_len + /* SSID */
379 4 + rates_len + /* (extended) rates */
380 4 + /* power capability */
381 2 + 2 * sband->n_channels + /* supported channels */
382 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
383 assoc_data->ie_len + /* extra IEs */
384 9, /* WMM */
385 GFP_KERNEL);
386 if (!skb)
387 return;
388
389 skb_reserve(skb, local->hw.extra_tx_headroom);
390
391 capab = WLAN_CAPABILITY_ESS;
392
393 if (sband->band == IEEE80211_BAND_2GHZ) {
394 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
395 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
396 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
397 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
398 }
399
400 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
401 capab |= WLAN_CAPABILITY_PRIVACY;
402
403 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
404 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
405 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
406
407 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
408 memset(mgmt, 0, 24);
409 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
410 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
411 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
412
413 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
414 skb_put(skb, 10);
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_REASSOC_REQ);
417 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.reassoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
420 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
421 ETH_ALEN);
422 } else {
423 skb_put(skb, 4);
424 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
425 IEEE80211_STYPE_ASSOC_REQ);
426 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
427 mgmt->u.assoc_req.listen_interval =
428 cpu_to_le16(local->hw.conf.listen_interval);
429 }
430
431 /* SSID */
432 pos = skb_put(skb, 2 + assoc_data->ssid_len);
433 *pos++ = WLAN_EID_SSID;
434 *pos++ = assoc_data->ssid_len;
435 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
436
437 /* add all rates which were marked to be used above */
438 supp_rates_len = rates_len;
439 if (supp_rates_len > 8)
440 supp_rates_len = 8;
441
442 pos = skb_put(skb, supp_rates_len + 2);
443 *pos++ = WLAN_EID_SUPP_RATES;
444 *pos++ = supp_rates_len;
445
446 count = 0;
447 for (i = 0; i < sband->n_bitrates; i++) {
448 if (BIT(i) & rates) {
449 int rate = sband->bitrates[i].bitrate;
450 *pos++ = (u8) (rate / 5);
451 if (++count == 8)
452 break;
453 }
454 }
455
456 if (rates_len > count) {
457 pos = skb_put(skb, rates_len - count + 2);
458 *pos++ = WLAN_EID_EXT_SUPP_RATES;
459 *pos++ = rates_len - count;
460
461 for (i++; i < sband->n_bitrates; i++) {
462 if (BIT(i) & rates) {
463 int rate = sband->bitrates[i].bitrate;
464 *pos++ = (u8) (rate / 5);
465 }
466 }
467 }
468
469 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
470 /* 1. power capabilities */
471 pos = skb_put(skb, 4);
472 *pos++ = WLAN_EID_PWR_CAPABILITY;
473 *pos++ = 2;
474 *pos++ = 0; /* min tx power */
475 *pos++ = local->oper_channel->max_power; /* max tx power */
476
477 /* 2. supported channels */
478 /* TODO: get this in reg domain format */
479 pos = skb_put(skb, 2 * sband->n_channels + 2);
480 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
481 *pos++ = 2 * sband->n_channels;
482 for (i = 0; i < sband->n_channels; i++) {
483 *pos++ = ieee80211_frequency_to_channel(
484 sband->channels[i].center_freq);
485 *pos++ = 1; /* one channel in the subband*/
486 }
487 }
488
489 /* if present, add any custom IEs that go before HT */
490 if (assoc_data->ie_len && assoc_data->ie) {
491 static const u8 before_ht[] = {
492 WLAN_EID_SSID,
493 WLAN_EID_SUPP_RATES,
494 WLAN_EID_EXT_SUPP_RATES,
495 WLAN_EID_PWR_CAPABILITY,
496 WLAN_EID_SUPPORTED_CHANNELS,
497 WLAN_EID_RSN,
498 WLAN_EID_QOS_CAPA,
499 WLAN_EID_RRM_ENABLED_CAPABILITIES,
500 WLAN_EID_MOBILITY_DOMAIN,
501 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
502 };
503 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
504 before_ht, ARRAY_SIZE(before_ht),
505 offset);
506 pos = skb_put(skb, noffset - offset);
507 memcpy(pos, assoc_data->ie + offset, noffset - offset);
508 offset = noffset;
509 }
510
4e74bfdb 511 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
074d46d1 512 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie,
66e67e41
JB		 513 sband, local->oper_channel, ifmgd->ap_smps);
514
515 /* if present, add any custom non-vendor IEs that go after HT */
516 if (assoc_data->ie_len && assoc_data->ie) {
517 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
518 assoc_data->ie_len,
519 offset);
520 pos = skb_put(skb, noffset - offset);
521 memcpy(pos, assoc_data->ie + offset, noffset - offset);
522 offset = noffset;
523 }
524
76f0303d
JB		 525 if (assoc_data->wmm) {
526 if (assoc_data->uapsd) {
dc41e4d4
EP		 527 qos_info = ifmgd->uapsd_queues;
528 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 529 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
530 } else {
531 qos_info = 0;
532 }
533
534 pos = skb_put(skb, 9);
535 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
536 *pos++ = 7; /* len */
537 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
538 *pos++ = 0x50;
539 *pos++ = 0xf2;
540 *pos++ = 2; /* WME */
541 *pos++ = 0; /* WME info */
542 *pos++ = 1; /* WME ver */
543 *pos++ = qos_info;
544 }
545
546 /* add any remaining custom (i.e. vendor specific here) IEs */
547 if (assoc_data->ie_len && assoc_data->ie) {
548 noffset = assoc_data->ie_len;
549 pos = skb_put(skb, noffset - offset);
550 memcpy(pos, assoc_data->ie + offset, noffset - offset);
551 }
552
553 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
554 ieee80211_tx_skb(sdata, skb);
555}
556
ef422bc0 557static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 558 const u8 *bssid, u16 stype,
5fef7dbc
JB		 559 u16 reason, bool send_frame,
560 u8 *frame_buf)
9ac19a90
JB		 561{
562 struct ieee80211_local *local = sdata->local;
46900298 563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 564 struct sk_buff *skb;
5fef7dbc 565 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 566
5fef7dbc
JB		 567 /* build frame */
568 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
569 mgmt->duration = 0; /* initialize only */
570 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 571 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 572 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 573 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 574 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 575 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
576
5fef7dbc
JB		 577 if (send_frame) {
578 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
579 DEAUTH_DISASSOC_LEN);
580 if (!skb)
581 return;
d5cdfacb 582
5fef7dbc
JB		 583 skb_reserve(skb, local->hw.extra_tx_headroom);
584
585 /* copy in frame */
586 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
587 mgmt, DEAUTH_DISASSOC_LEN);
588
589 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
590 IEEE80211_SKB_CB(skb)->flags |=
591 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 592 ieee80211_tx_skb(sdata, skb);
5fef7dbc 593 }
9ac19a90
JB		 594}
595
572e0012
KV		 596void ieee80211_send_pspoll(struct ieee80211_local *local,
597 struct ieee80211_sub_if_data *sdata)
598{
572e0012
KV		 599 struct ieee80211_pspoll *pspoll;
600 struct sk_buff *skb;
572e0012 601
d8cd189e
KV		 602 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
603 if (!skb)
572e0012 604 return;
572e0012 605
d8cd189e
KV		 606 pspoll = (struct ieee80211_pspoll *) skb->data;
607 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 608
62ae67be
JB		 609 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
610 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 611}
612
965bedad
JB		 613void ieee80211_send_nullfunc(struct ieee80211_local *local,
614 struct ieee80211_sub_if_data *sdata,
615 int powersave)
616{
617 struct sk_buff *skb;
d8cd189e 618 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 620
d8cd189e
KV		 621 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
622 if (!skb)
965bedad 623 return;
965bedad 624
d8cd189e 625 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 626 if (powersave)
d8cd189e 627 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 628
62ae67be 629 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 630 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
631 IEEE80211_STA_CONNECTION_POLL))
632 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
633
62ae67be 634 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 635}
636
d524215f
FF		 637static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
638 struct ieee80211_sub_if_data *sdata)
639{
640 struct sk_buff *skb;
641 struct ieee80211_hdr *nullfunc;
642 __le16 fc;
643
644 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
645 return;
646
647 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 648 if (!skb)
d524215f 649 return;
d15b8459 650
d524215f
FF		 651 skb_reserve(skb, local->hw.extra_tx_headroom);
652
653 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
654 memset(nullfunc, 0, 30);
655 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
656 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
657 nullfunc->frame_control = fc;
658 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
659 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
660 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
661 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
662
663 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
664 ieee80211_tx_skb(sdata, skb);
665}
666
cc32abd4
JB		 667/* spectrum management related things */
668static void ieee80211_chswitch_work(struct work_struct *work)
669{
670 struct ieee80211_sub_if_data *sdata =
671 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
673
9607e6b6 674 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 675 return;
676
77fdaa12
JB		 677 mutex_lock(&ifmgd->mtx);
678 if (!ifmgd->associated)
679 goto out;
cc32abd4
JB		 680
681 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 682 if (!sdata->local->ops->channel_switch) {
683 /* call "hw_config" only if doing sw channel switch */
684 ieee80211_hw_config(sdata->local,
685 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 686 } else {
687 /* update the device channel directly */
688 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 689 }
77fdaa12 690
cc32abd4 691 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 692 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 693
cc32abd4
JB		 694 ieee80211_wake_queues_by_reason(&sdata->local->hw,
695 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 696 out:
697 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
698 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 699}
700
5ce6e438
JB		 701void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
702{
703 struct ieee80211_sub_if_data *sdata;
704 struct ieee80211_if_managed *ifmgd;
705
706 sdata = vif_to_sdata(vif);
707 ifmgd = &sdata->u.mgd;
708
709 trace_api_chswitch_done(sdata, success);
710 if (!success) {
711 /*
712 * If the channel switch was not successful, stay
713 * around on the old channel. We currently lack
714 * good handling of this situation, possibly we
715 * should just drop the association.
716 */
717 sdata->local->csa_channel = sdata->local->oper_channel;
718 }
719
720 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
721}
722EXPORT_SYMBOL(ieee80211_chswitch_done);
723
cc32abd4
JB		 724static void ieee80211_chswitch_timer(unsigned long data)
725{
726 struct ieee80211_sub_if_data *sdata =
727 (struct ieee80211_sub_if_data *) data;
728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
729
5bb644a0
JB		 730 if (sdata->local->quiescing) {
731 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
732 return;
733 }
734
42935eca 735 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 736}
737
738void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
739 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 740 struct ieee80211_bss *bss,
741 u64 timestamp)
cc32abd4 742{
0c1ad2ca
JB		 743 struct cfg80211_bss *cbss =
744 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 745 struct ieee80211_channel *new_ch;
746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 747 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
748 cbss->channel->band);
cc32abd4 749
77fdaa12
JB		 750 ASSERT_MGD_MTX(ifmgd);
751
752 if (!ifmgd->associated)
cc32abd4
JB		 753 return;
754
fbe9c429 755 if (sdata->local->scanning)
cc32abd4
JB		 756 return;
757
758 /* Disregard subsequent beacons if we are already running a timer
759 processing a CSA */
760
761 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
762 return;
763
764 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
765 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
766 return;
767
768 sdata->local->csa_channel = new_ch;
769
5ce6e438
JB		 770 if (sdata->local->ops->channel_switch) {
771 /* use driver's channel switch callback */
772 struct ieee80211_channel_switch ch_switch;
773 memset(&ch_switch, 0, sizeof(ch_switch));
774 ch_switch.timestamp = timestamp;
775 if (sw_elem->mode) {
776 ch_switch.block_tx = true;
777 ieee80211_stop_queues_by_reason(&sdata->local->hw,
778 IEEE80211_QUEUE_STOP_REASON_CSA);
779 }
780 ch_switch.channel = new_ch;
781 ch_switch.count = sw_elem->count;
782 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
783 drv_channel_switch(sdata->local, &ch_switch);
784 return;
785 }
786
787 /* channel switch handled in software */
cc32abd4 788 if (sw_elem->count <= 1) {
42935eca 789 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 790 } else {
9feaddc7
WYG		 791 if (sw_elem->mode)
792 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 793 IEEE80211_QUEUE_STOP_REASON_CSA);
794 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
795 mod_timer(&ifmgd->chswitch_timer,
796 jiffies +
797 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 798 cbss->beacon_interval));
cc32abd4
JB		 799 }
800}
801
802static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
803 u16 capab_info, u8 *pwr_constr_elem,
804 u8 pwr_constr_elem_len)
805{
806 struct ieee80211_conf *conf = &sdata->local->hw.conf;
807
808 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
809 return;
810
811 /* Power constraint IE length should be 1 octet */
812 if (pwr_constr_elem_len != 1)
813 return;
814
a48b13ac 815 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 816 (*pwr_constr_elem != sdata->local->power_constr_level)) {
817 sdata->local->power_constr_level = *pwr_constr_elem;
818 ieee80211_hw_config(sdata->local, 0);
819 }
820}
821
f90754c1
JO		 822void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
823{
824 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
825 struct ieee80211_local *local = sdata->local;
826 struct ieee80211_conf *conf = &local->hw.conf;
827
828 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
829 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
830 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
831
832 local->disable_dynamic_ps = false;
833 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
834}
835EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
836
837void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
838{
839 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
840 struct ieee80211_local *local = sdata->local;
841 struct ieee80211_conf *conf = &local->hw.conf;
842
843 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
844 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
845 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
846
847 local->disable_dynamic_ps = true;
848 conf->dynamic_ps_timeout = 0;
849 del_timer_sync(&local->dynamic_ps_timer);
850 ieee80211_queue_work(&local->hw,
851 &local->dynamic_ps_enable_work);
852}
853EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
854
965bedad
JB		 855/* powersave */
856static void ieee80211_enable_ps(struct ieee80211_local *local,
857 struct ieee80211_sub_if_data *sdata)
858{
859 struct ieee80211_conf *conf = &local->hw.conf;
860
d5edaedc
JB		 861 /*
862 * If we are scanning right now then the parameters will
863 * take effect when scan finishes.
864 */
fbe9c429 865 if (local->scanning)
d5edaedc
JB		 866 return;
867
965bedad
JB		 868 if (conf->dynamic_ps_timeout > 0 &&
869 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
870 mod_timer(&local->dynamic_ps_timer, jiffies +
871 msecs_to_jiffies(conf->dynamic_ps_timeout));
872 } else {
873 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
874 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 875
2a13052f
JO		 876 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
877 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
878 return;
879
880 conf->flags |= IEEE80211_CONF_PS;
881 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 882 }
883}
884
885static void ieee80211_change_ps(struct ieee80211_local *local)
886{
887 struct ieee80211_conf *conf = &local->hw.conf;
888
889 if (local->ps_sdata) {
965bedad
JB		 890 ieee80211_enable_ps(local, local->ps_sdata);
891 } else if (conf->flags & IEEE80211_CONF_PS) {
892 conf->flags &= ~IEEE80211_CONF_PS;
893 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
894 del_timer_sync(&local->dynamic_ps_timer);
895 cancel_work_sync(&local->dynamic_ps_enable_work);
896 }
897}
898
808118cb
JY		 899static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
900{
901 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
902 struct sta_info *sta = NULL;
c2c98fde 903 bool authorized = false;
808118cb
JY		 904
905 if (!mgd->powersave)
906 return false;
907
05cb9108
JB		 908 if (mgd->broken_ap)
909 return false;
910
808118cb
JY		 911 if (!mgd->associated)
912 return false;
913
914 if (!mgd->associated->beacon_ies)
915 return false;
916
917 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
918 IEEE80211_STA_CONNECTION_POLL))
919 return false;
920
921 rcu_read_lock();
922 sta = sta_info_get(sdata, mgd->bssid);
923 if (sta)
c2c98fde 924 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 925 rcu_read_unlock();
926
c2c98fde 927 return authorized;
808118cb
JY		 928}
929
965bedad 930/* need to hold RTNL or interface lock */
10f644a4 931void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 932{
933 struct ieee80211_sub_if_data *sdata, *found = NULL;
934 int count = 0;
195e294d 935 int timeout;
965bedad
JB		 936
937 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
938 local->ps_sdata = NULL;
939 return;
940 }
941
af6b6374
JB		 942 if (!list_empty(&local->work_list)) {
943 local->ps_sdata = NULL;
944 goto change;
945 }
946
965bedad 947 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 948 if (!ieee80211_sdata_running(sdata))
965bedad 949 continue;
8c7914de
RM		 950 if (sdata->vif.type == NL80211_IFTYPE_AP) {
951 /* If an AP vif is found, then disable PS
952 * by setting the count to zero thereby setting
953 * ps_sdata to NULL.
954 */
955 count = 0;
956 break;
957 }
965bedad
JB		 958 if (sdata->vif.type != NL80211_IFTYPE_STATION)
959 continue;
960 found = sdata;
961 count++;
962 }
963
808118cb 964 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 965 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 966 s32 beaconint_us;
967
968 if (latency < 0)
ed77134b 969 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 970
971 beaconint_us = ieee80211_tu_to_usec(
972 found->vif.bss_conf.beacon_int);
973
ff616381 974 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 975 if (timeout < 0) {
976 /*
ff616381
JO		 977 * Go to full PSM if the user configures a very low
978 * latency requirement.
0ab82b04
EP		 979 * The 2000 second value is there for compatibility
980 * until the PM_QOS_NETWORK_LATENCY is configured
981 * with real values.
195e294d 982 */
0ab82b04
EP		 983 if (latency > (1900 * USEC_PER_MSEC) &&
984 latency != (2000 * USEC_PER_SEC))
195e294d 985 timeout = 0;
ff616381
JO		 986 else
987 timeout = 100;
195e294d 988 }
f90754c1
JO		 989 local->dynamic_ps_user_timeout = timeout;
990 if (!local->disable_dynamic_ps)
991 conf->dynamic_ps_timeout =
992 local->dynamic_ps_user_timeout;
195e294d 993
04fe2037 994 if (beaconint_us > latency) {
10f644a4 995 local->ps_sdata = NULL;
04fe2037 996 } else {
56007a02 997 struct ieee80211_bss *bss;
04fe2037 998 int maxslp = 1;
56007a02 999 u8 dtimper;
04fe2037 1000
56007a02
JB		 1001 bss = (void *)found->u.mgd.associated->priv;
1002 dtimper = bss->dtim_period;
1003
1004 /* If the TIM IE is invalid, pretend the value is 1 */
1005 if (!dtimper)
1006 dtimper = 1;
1007 else if (dtimper > 1)
04fe2037
JB		 1008 maxslp = min_t(int, dtimper,
1009 latency / beaconint_us);
1010
9ccebe61 1011 local->hw.conf.max_sleep_period = maxslp;
56007a02 1012 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1013 local->ps_sdata = found;
04fe2037 1014 }
10f644a4 1015 } else {
965bedad 1016 local->ps_sdata = NULL;
10f644a4 1017 }
965bedad 1018
af6b6374 1019 change:
965bedad
JB		 1020 ieee80211_change_ps(local);
1021}
1022
1023void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1024{
1025 struct ieee80211_local *local =
1026 container_of(work, struct ieee80211_local,
1027 dynamic_ps_disable_work);
1028
1029 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1030 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1031 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1032 }
1033
1034 ieee80211_wake_queues_by_reason(&local->hw,
1035 IEEE80211_QUEUE_STOP_REASON_PS);
1036}
1037
1038void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1039{
1040 struct ieee80211_local *local =
1041 container_of(work, struct ieee80211_local,
1042 dynamic_ps_enable_work);
1043 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1044 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1045 unsigned long flags;
1046 int q;
965bedad
JB		 1047
1048 /* can only happen when PS was just disabled anyway */
1049 if (!sdata)
1050 return;
1051
5e34069c
CL		 1052 ifmgd = &sdata->u.mgd;
1053
965bedad
JB		 1054 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1055 return;
1056
77b7023a
AN		 1057 if (!local->disable_dynamic_ps &&
1058 local->hw.conf.dynamic_ps_timeout > 0) {
1059 /* don't enter PS if TX frames are pending */
1060 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1061 mod_timer(&local->dynamic_ps_timer, jiffies +
1062 msecs_to_jiffies(
1063 local->hw.conf.dynamic_ps_timeout));
1064 return;
1065 }
77b7023a
AN		 1066
1067 /*
1068 * transmission can be stopped by others which leads to
1069 * dynamic_ps_timer expiry. Postpone the ps timer if it
1070 * is not the actual idle state.
1071 */
1072 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1073 for (q = 0; q < local->hw.queues; q++) {
1074 if (local->queue_stop_reasons[q]) {
1075 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1076 flags);
1077 mod_timer(&local->dynamic_ps_timer, jiffies +
1078 msecs_to_jiffies(
1079 local->hw.conf.dynamic_ps_timeout));
1080 return;
1081 }
1082 }
1083 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1084 }
1ddc2867 1085
375177bf 1086 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1087 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1088 netif_tx_stop_all_queues(sdata->dev);
965bedad 1089
e8306f98
VN		 1090 if (drv_tx_frames_pending(local))
1091 mod_timer(&local->dynamic_ps_timer, jiffies +
1092 msecs_to_jiffies(
1093 local->hw.conf.dynamic_ps_timeout));
1094 else {
1095 ieee80211_send_nullfunc(local, sdata, 1);
1096 /* Flush to get the tx status of nullfunc frame */
1097 drv_flush(local, false);
1098 }
f3e85b9e
VN		 1099 }
1100
2a13052f
JO		 1101 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1102 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1103 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1104 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1105 local->hw.conf.flags |= IEEE80211_CONF_PS;
1106 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1107 }
f3e85b9e 1108
77b7023a
AN		 1109 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1110 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1111}
1112
1113void ieee80211_dynamic_ps_timer(unsigned long data)
1114{
1115 struct ieee80211_local *local = (void *) data;
1116
78f1a8b7 1117 if (local->quiescing || local->suspended)
5bb644a0
JB		 1118 return;
1119
42935eca 1120 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1121}
1122
60f8b39c 1123/* MLME */
f698d856 1124static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1125 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1126 u8 *wmm_param, size_t wmm_param_len)
1127{
f0706e82 1128 struct ieee80211_tx_queue_params params;
4ced3f74 1129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1130 size_t left;
1131 int count;
ab13315a 1132 u8 *pos, uapsd_queues = 0;
f0706e82 1133
e1b3ec1a
SG		 1134 if (!local->ops->conf_tx)
1135 return;
1136
32c5057b 1137 if (local->hw.queues < IEEE80211_NUM_ACS)
3434fbd3
JB		 1138 return;
1139
1140 if (!wmm_param)
1141 return;
1142
f0706e82
JB		 1143 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1144 return;
ab13315a
KV		 1145
1146 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1147 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1148
f0706e82 1149 count = wmm_param[6] & 0x0f;
46900298 1150 if (count == ifmgd->wmm_last_param_set)
f0706e82 1151 return;
46900298 1152 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1153
1154 pos = wmm_param + 8;
1155 left = wmm_param_len - 8;
1156
1157 memset(&params, 0, sizeof(params));
1158
f0706e82
JB		 1159 local->wmm_acm = 0;
1160 for (; left >= 4; left -= 4, pos += 4) {
1161 int aci = (pos[0] >> 5) & 0x03;
1162 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1163 bool uapsd = false;
f0706e82
JB		 1164 int queue;
1165
1166 switch (aci) {
0eeb59fe 1167 case 1: /* AC_BK */
e100bb64 1168 queue = 3;
988c0f72 1169 if (acm)
0eeb59fe 1170 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1171 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1172 uapsd = true;
f0706e82 1173 break;
0eeb59fe 1174 case 2: /* AC_VI */
e100bb64 1175 queue = 1;
988c0f72 1176 if (acm)
0eeb59fe 1177 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1178 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1179 uapsd = true;
f0706e82 1180 break;
0eeb59fe 1181 case 3: /* AC_VO */
e100bb64 1182 queue = 0;
988c0f72 1183 if (acm)
0eeb59fe 1184 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1185 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1186 uapsd = true;
f0706e82 1187 break;
0eeb59fe 1188 case 0: /* AC_BE */
f0706e82 1189 default:
e100bb64 1190 queue = 2;
988c0f72 1191 if (acm)
0eeb59fe 1192 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1193 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1194 uapsd = true;
f0706e82
JB		 1195 break;
1196 }
1197
1198 params.aifs = pos[0] & 0x0f;
1199 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1200 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1201 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1202 params.uapsd = uapsd;
1203
f4ea83dd 1204#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1205 wiphy_debug(local->hw.wiphy,
1206 "WMM queue=%d aci=%d acm=%d aifs=%d "
1207 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1208 queue, aci, acm,
1209 params.aifs, params.cw_min, params.cw_max,
1210 params.txop, params.uapsd);
3330d7be 1211#endif
f6f3def3
EP		 1212 sdata->tx_conf[queue] = params;
1213 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1214 wiphy_debug(local->hw.wiphy,
1215 "failed to set TX queue parameters for queue %d\n",
1216 queue);
f0706e82 1217 }
e1b3ec1a
SG		 1218
1219 /* enable WMM or activate new settings */
4ced3f74 1220 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1221}
1222
925e64c3
SG		 1223static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1224{
1225 lockdep_assert_held(&sdata->local->mtx);
1226
1227 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1228 IEEE80211_STA_BEACON_POLL);
1229 ieee80211_run_deferred_scan(sdata->local);
1230}
1231
1232static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1233{
1234 mutex_lock(&sdata->local->mtx);
1235 __ieee80211_stop_poll(sdata);
1236 mutex_unlock(&sdata->local->mtx);
1237}
1238
7a5158ef
JB		 1239static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1240 u16 capab, bool erp_valid, u8 erp)
5628221c 1241{
bda3933a 1242 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1243 u32 changed = 0;
7a5158ef
JB		 1244 bool use_protection;
1245 bool use_short_preamble;
1246 bool use_short_slot;
1247
1248 if (erp_valid) {
1249 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1250 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1251 } else {
1252 use_protection = false;
1253 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1254 }
1255
1256 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1257 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1258 use_short_slot = true;
5628221c 1259
471b3efd 1260 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1261 bss_conf->use_cts_prot = use_protection;
1262 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1263 }
7e9ed188 1264
d43c7b37 1265 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1266 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1267 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1268 }
d9430a32 1269
7a5158ef 1270 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1271 bss_conf->use_short_slot = use_short_slot;
1272 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1273 }
1274
1275 return changed;
1276}
1277
f698d856 1278static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1279 struct cfg80211_bss *cbss,
ae5eb026 1280 u32 bss_info_changed)
f0706e82 1281{
0c1ad2ca 1282 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1283 struct ieee80211_local *local = sdata->local;
68542962 1284 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1285
ae5eb026 1286 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1287 /* set timing information */
68542962 1288 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1289 bss_conf->last_tsf = cbss->tsf;
5628221c 1290
77fdaa12
JB		 1291 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1292 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1293 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1294
7ccc8bd7
FF		 1295 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1296 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1297
0c1ad2ca
JB		 1298 sdata->u.mgd.associated = cbss;
1299 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1300
17e4ec14
JM		 1301 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1302
b291ba11 1303 /* just to be sure */
925e64c3 1304 ieee80211_stop_poll(sdata);
b291ba11 1305
9ac19a90 1306 ieee80211_led_assoc(local, 1);
9306102e 1307
e5b900d2
JB		 1308 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1309 bss_conf->dtim_period = bss->dtim_period;
1310 else
1311 bss_conf->dtim_period = 0;
1312
68542962 1313 bss_conf->assoc = 1;
9cef8737 1314
a97c13c3 1315 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1316 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1317 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1318 bss_info_changed |= BSS_CHANGED_CQM;
1319
68542962
JO		 1320 /* Enable ARP filtering */
1321 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1322 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1323 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1324 }
1325
ae5eb026 1326 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1327
056508dc
JB		 1328 mutex_lock(&local->iflist_mtx);
1329 ieee80211_recalc_ps(local, -1);
025e6be2 1330 ieee80211_recalc_smps(local);
056508dc 1331 mutex_unlock(&local->iflist_mtx);
e0cb686f 1332
8a5b33f5 1333 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1334 netif_carrier_on(sdata->dev);
f0706e82
JB		 1335}
1336
e69e95db 1337static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1338 u16 stype, u16 reason, bool tx,
1339 u8 *frame_buf)
aa458d17 1340{
46900298 1341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1342 struct ieee80211_local *local = sdata->local;
1343 struct sta_info *sta;
3cc5240b 1344 u32 changed = 0;
aa458d17 1345
77fdaa12
JB		 1346 ASSERT_MGD_MTX(ifmgd);
1347
37ad3888
JB		 1348 if (WARN_ON_ONCE(tx && !frame_buf))
1349 return;
1350
b291ba11
JB		 1351 if (WARN_ON(!ifmgd->associated))
1352 return;
1353
79543d8e
DS		 1354 ieee80211_stop_poll(sdata);
1355
77fdaa12 1356 ifmgd->associated = NULL;
77fdaa12
JB		 1357
1358 /*
1359 * we need to commit the associated = NULL change because the
1360 * scan code uses that to determine whether this iface should
1361 * go to/wake up from powersave or not -- and could otherwise
1362 * wake the queues erroneously.
1363 */
1364 smp_mb();
1365
1366 /*
1367 * Thus, we can only afterwards stop the queues -- to account
1368 * for the case where another CPU is finishing a scan at this
1369 * time -- we don't want the scan code to enable queues.
1370 */
aa458d17 1371
8a5b33f5 1372 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1373 netif_carrier_off(sdata->dev);
1374
2a419056 1375 mutex_lock(&local->sta_mtx);
88a9e31c 1376 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1377 if (sta) {
c2c98fde 1378 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1379 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1380 }
2a419056 1381 mutex_unlock(&local->sta_mtx);
aa458d17 1382
37ad3888
JB		 1383 /* deauthenticate/disassociate now */
1384 if (tx || frame_buf)
88a9e31c
EP		 1385 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1386 reason, tx, frame_buf);
37ad3888
JB		 1387
1388 /* flush out frame */
1389 if (tx)
1390 drv_flush(local, false);
1391
88a9e31c
EP		 1392 /* clear bssid only after building the needed mgmt frames */
1393 memset(ifmgd->bssid, 0, ETH_ALEN);
1394
37ad3888
JB		 1395 /* remove AP and TDLS peers */
1396 sta_info_flush(local, sdata);
1397
1398 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1399 changed |= ieee80211_reset_erp_info(sdata);
1400
f5e5bf25 1401 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1402 changed |= BSS_CHANGED_ASSOC;
1403 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1404
413ad50a 1405 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1406 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1407 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1408
a8302de9
VT		 1409 local->power_constr_level = 0;
1410
520eb820
KV		 1411 del_timer_sync(&local->dynamic_ps_timer);
1412 cancel_work_sync(&local->dynamic_ps_enable_work);
1413
e0cb686f
KV		 1414 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1415 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1416 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1417 }
a331400b 1418 local->ps_sdata = NULL;
ae5eb026 1419
68542962
JO		 1420 /* Disable ARP filtering */
1421 if (sdata->vif.bss_conf.arp_filter_enabled) {
1422 sdata->vif.bss_conf.arp_filter_enabled = false;
1423 changed |= BSS_CHANGED_ARP_FILTER;
1424 }
1425
3abead59
JB		 1426 sdata->vif.bss_conf.qos = false;
1427 changed |= BSS_CHANGED_QOS;
1428
0aaffa9b
JB		 1429 /* The BSSID (not really interesting) and HT changed */
1430 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1431 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1432
3cc5240b
JB		 1433 /* channel(_type) changes are handled by ieee80211_hw_config */
1434 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1435 ieee80211_hw_config(local, 0);
1436
3abead59
JB		 1437 /* disassociated - set to defaults now */
1438 ieee80211_set_wmm_default(sdata, false);
1439
b9dcf712
JB		 1440 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1441 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1442 del_timer_sync(&sdata->u.mgd.timer);
1443 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1444}
f0706e82 1445
3cf335d5
KV		 1446void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1447 struct ieee80211_hdr *hdr)
1448{
1449 /*
1450 * We can postpone the mgd.timer whenever receiving unicast frames
1451 * from AP because we know that the connection is working both ways
1452 * at that time. But multicast frames (and hence also beacons) must
1453 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1454 * data idle periods for sending the periodic probe request to the
1455 * AP we're connected to.
3cf335d5 1456 */
b291ba11
JB		 1457 if (is_multicast_ether_addr(hdr->addr1))
1458 return;
1459
be099e82 1460 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1461}
f0706e82 1462
4e5ff376
FF		 1463static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1464{
1465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1466 struct ieee80211_local *local = sdata->local;
4e5ff376 1467
133d40f9 1468 mutex_lock(&local->mtx);
4e5ff376 1469 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1470 IEEE80211_STA_CONNECTION_POLL))) {
1471 mutex_unlock(&local->mtx);
1472 return;
1473 }
4e5ff376 1474
925e64c3 1475 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1476
1477 mutex_lock(&local->iflist_mtx);
1478 ieee80211_recalc_ps(local, -1);
1479 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1480
1481 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1482 goto out;
4e5ff376
FF		 1483
1484 /*
1485 * We've received a probe response, but are not sure whether
1486 * we have or will be receiving any beacons or data, so let's
1487 * schedule the timers again, just in case.
1488 */
1489 ieee80211_sta_reset_beacon_monitor(sdata);
1490
1491 mod_timer(&ifmgd->conn_mon_timer,
1492 round_jiffies_up(jiffies +
1493 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1494out:
133d40f9 1495 mutex_unlock(&local->mtx);
4e5ff376
FF		 1496}
1497
1498void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1499 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1500{
75706d0e 1501 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1502 return;
1503
04ac3c0e
FF		 1504 if (ack)
1505 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1506
1507 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1508 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1509 if (ack)
1510 sdata->u.mgd.probe_send_count = 0;
1511 else
1512 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1513 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1514 }
1515}
1516
a43abf29
ML		 1517static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1518{
1519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1520 const u8 *ssid;
f01a067d 1521 u8 *dst = ifmgd->associated->bssid;
180205bd 1522 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1523
1524 /*
1525 * Try sending broadcast probe requests for the last three
1526 * probe requests after the first ones failed since some
1527 * buggy APs only support broadcast probe requests.
1528 */
1529 if (ifmgd->probe_send_count >= unicast_limit)
1530 dst = NULL;
a43abf29 1531
4e5ff376
FF		 1532 /*
1533 * When the hardware reports an accurate Tx ACK status, it's
1534 * better to send a nullfunc frame instead of a probe request,
1535 * as it will kick us off the AP quickly if we aren't associated
1536 * anymore. The timeout will be reset if the frame is ACKed by
1537 * the AP.
1538 */
992e68bf
SD		 1539 ifmgd->probe_send_count++;
1540
04ac3c0e
FF		 1541 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1542 ifmgd->nullfunc_failed = false;
4e5ff376 1543 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1544 } else {
88c868c4
SG		 1545 int ssid_len;
1546
4e5ff376 1547 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1548 if (WARN_ON_ONCE(ssid == NULL))
1549 ssid_len = 0;
1550 else
1551 ssid_len = ssid[1];
1552
1553 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1554 0, (u32) -1, true, false);
4e5ff376 1555 }
a43abf29 1556
180205bd 1557 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1558 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1559 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1560 drv_flush(sdata->local, false);
a43abf29
ML		 1561}
1562
b291ba11
JB		 1563static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1564 bool beacon)
04de8381 1565{
04de8381 1566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1567 bool already = false;
34bfc411 1568
9607e6b6 1569 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1570 return;
1571
77fdaa12
JB		 1572 mutex_lock(&ifmgd->mtx);
1573
1574 if (!ifmgd->associated)
1575 goto out;
1576
133d40f9
SG		 1577 mutex_lock(&sdata->local->mtx);
1578
1579 if (sdata->local->tmp_channel || sdata->local->scanning) {
1580 mutex_unlock(&sdata->local->mtx);
1581 goto out;
1582 }
1583
a860402d 1584#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 1585 if (beacon)
1586 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1587 sdata->name);
a860402d 1588#endif
04de8381 1589
b291ba11
JB		 1590 /*
1591 * The driver/our work has already reported this event or the
1592 * connection monitoring has kicked in and we have already sent
1593 * a probe request. Or maybe the AP died and the driver keeps
1594 * reporting until we disassociate...
1595 *
1596 * In either case we have to ignore the current call to this
1597 * function (except for setting the correct probe reason bit)
1598 * because otherwise we would reset the timer every time and
1599 * never check whether we received a probe response!
1600 */
1601 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1602 IEEE80211_STA_CONNECTION_POLL))
1603 already = true;
1604
1605 if (beacon)
1606 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1607 else
1608 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1609
133d40f9
SG		 1610 mutex_unlock(&sdata->local->mtx);
1611
b291ba11
JB		 1612 if (already)
1613 goto out;
1614
4e751843
JB		 1615 mutex_lock(&sdata->local->iflist_mtx);
1616 ieee80211_recalc_ps(sdata->local, -1);
1617 mutex_unlock(&sdata->local->iflist_mtx);
1618
a43abf29
ML		 1619 ifmgd->probe_send_count = 0;
1620 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1621 out:
1622 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1623}
1624
a619a4c0
JO		 1625struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1626 struct ieee80211_vif *vif)
1627{
1628 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1630 struct sk_buff *skb;
1631 const u8 *ssid;
88c868c4 1632 int ssid_len;
a619a4c0
JO		 1633
1634 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1635 return NULL;
1636
1637 ASSERT_MGD_MTX(ifmgd);
1638
1639 if (!ifmgd->associated)
1640 return NULL;
1641
1642 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1643 if (WARN_ON_ONCE(ssid == NULL))
1644 ssid_len = 0;
1645 else
1646 ssid_len = ssid[1];
1647
a619a4c0 1648 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
88c868c4 1649 (u32) -1, ssid + 2, ssid_len,
85a237fe 1650 NULL, 0, true);
a619a4c0
JO		 1651
1652 return skb;
1653}
1654EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1655
1e4dcd01
JO		 1656static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1657{
1658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1659 struct ieee80211_local *local = sdata->local;
1660 u8 bssid[ETH_ALEN];
5fef7dbc 1661 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1662
1663 mutex_lock(&ifmgd->mtx);
1664 if (!ifmgd->associated) {
1665 mutex_unlock(&ifmgd->mtx);
1666 return;
1667 }
1668
1669 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1670
180205bd
BG		 1671 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1672 sdata->name, bssid);
1e4dcd01 1673
37ad3888
JB		 1674 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1675 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1676 false, frame_buf);
1e4dcd01 1677 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1678
1e4dcd01
JO		 1679 /*
1680 * must be outside lock due to cfg80211,
1681 * but that's not a problem.
1682 */
5fef7dbc 1683 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1684
1685 mutex_lock(&local->mtx);
1686 ieee80211_recalc_idle(local);
1687 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1688}
1689
1690void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1691{
1692 struct ieee80211_sub_if_data *sdata =
1693 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1694 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1696 struct sta_info *sta;
1697
1698 if (ifmgd->associated) {
30fa9047 1699 rcu_read_lock();
a85e1d55
PS		 1700 sta = sta_info_get(sdata, ifmgd->bssid);
1701 if (sta)
1702 sta->beacon_loss_count++;
30fa9047 1703 rcu_read_unlock();
a85e1d55 1704 }
b291ba11 1705
1e4dcd01
JO		 1706 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1707 __ieee80211_connection_loss(sdata);
1708 else
1709 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1710}
1711
04de8381
KV		 1712void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1713{
1714 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1715 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1716
b5878a2d
JB		 1717 trace_api_beacon_loss(sdata);
1718
1e4dcd01
JO		 1719 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1720 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1721}
1722EXPORT_SYMBOL(ieee80211_beacon_loss);
1723
1e4dcd01
JO		 1724void ieee80211_connection_loss(struct ieee80211_vif *vif)
1725{
1726 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1727 struct ieee80211_hw *hw = &sdata->local->hw;
1728
b5878a2d
JB		 1729 trace_api_connection_loss(sdata);
1730
1e4dcd01
JO		 1731 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1732 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1733}
1734EXPORT_SYMBOL(ieee80211_connection_loss);
1735
1736
66e67e41
JB		 1737static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1738 bool assoc)
1739{
1740 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1741
1742 lockdep_assert_held(&sdata->u.mgd.mtx);
1743
66e67e41
JB		 1744 if (!assoc) {
1745 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1746
1747 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1748 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1749 }
1750
1751 cfg80211_put_bss(auth_data->bss);
1752 kfree(auth_data);
1753 sdata->u.mgd.auth_data = NULL;
1754}
1755
1756static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1757 struct ieee80211_mgmt *mgmt, size_t len)
1758{
1759 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1760 u8 *pos;
1761 struct ieee802_11_elems elems;
1762
1763 pos = mgmt->u.auth.variable;
1764 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1765 if (!elems.challenge)
1766 return;
1767 auth_data->expected_transaction = 4;
1768 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1769 elems.challenge - 2, elems.challenge_len + 2,
1770 auth_data->bss->bssid, auth_data->bss->bssid,
1771 auth_data->key, auth_data->key_len,
1772 auth_data->key_idx);
1773}
1774
1775static enum rx_mgmt_action __must_check
1776ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1777 struct ieee80211_mgmt *mgmt, size_t len)
1778{
1779 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1780 u8 bssid[ETH_ALEN];
1781 u16 auth_alg, auth_transaction, status_code;
1782 struct sta_info *sta;
1783
1784 lockdep_assert_held(&ifmgd->mtx);
1785
1786 if (len < 24 + 6)
1787 return RX_MGMT_NONE;
1788
1789 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1790 return RX_MGMT_NONE;
1791
1792 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1793
b203ca39 1794 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1795 return RX_MGMT_NONE;
1796
1797 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1798 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1799 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1800
1801 if (auth_alg != ifmgd->auth_data->algorithm ||
1802 auth_transaction != ifmgd->auth_data->expected_transaction)
1803 return RX_MGMT_NONE;
1804
1805 if (status_code != WLAN_STATUS_SUCCESS) {
1806 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1807 sdata->name, mgmt->sa, status_code);
1808 goto out;
1809 }
1810
1811 switch (ifmgd->auth_data->algorithm) {
1812 case WLAN_AUTH_OPEN:
1813 case WLAN_AUTH_LEAP:
1814 case WLAN_AUTH_FT:
1815 break;
1816 case WLAN_AUTH_SHARED_KEY:
1817 if (ifmgd->auth_data->expected_transaction != 4) {
1818 ieee80211_auth_challenge(sdata, mgmt, len);
1819 /* need another frame */
1820 return RX_MGMT_NONE;
1821 }
1822 break;
1823 default:
1824 WARN_ONCE(1, "invalid auth alg %d",
1825 ifmgd->auth_data->algorithm);
1826 return RX_MGMT_NONE;
1827 }
1828
1829 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1830 out:
66e67e41
JB		 1831 ifmgd->auth_data->done = true;
1832 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1833 run_again(ifmgd, ifmgd->auth_data->timeout);
1834
1835 /* move station state to auth */
1836 mutex_lock(&sdata->local->sta_mtx);
1837 sta = sta_info_get(sdata, bssid);
1838 if (!sta) {
1839 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1840 goto out_err;
1841 }
1842 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1843 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1844 sdata->name, bssid);
1845 goto out_err;
1846 }
1847 mutex_unlock(&sdata->local->sta_mtx);
1848
1849 return RX_MGMT_CFG80211_RX_AUTH;
1850 out_err:
1851 mutex_unlock(&sdata->local->sta_mtx);
1852 /* ignore frame -- wait for timeout */
1853 return RX_MGMT_NONE;
1854}
1855
1856
77fdaa12
JB		 1857static enum rx_mgmt_action __must_check
1858ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1859 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1860{
46900298 1861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1862 const u8 *bssid = NULL;
f0706e82
JB		 1863 u16 reason_code;
1864
66e67e41
JB		 1865 lockdep_assert_held(&ifmgd->mtx);
1866
f4ea83dd 1867 if (len < 24 + 2)
77fdaa12 1868 return RX_MGMT_NONE;
f0706e82 1869
66e67e41 1870 if (!ifmgd->associated ||
b203ca39 1871 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1872 return RX_MGMT_NONE;
77fdaa12 1873
0c1ad2ca 1874 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1875
1876 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1877
77fdaa12 1878 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1879 sdata->name, bssid, reason_code);
77fdaa12 1880
37ad3888
JB		 1881 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1882
7da7cc1d 1883 mutex_lock(&sdata->local->mtx);
63f170e0 1884 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1885 mutex_unlock(&sdata->local->mtx);
f0706e82 1886
77fdaa12 1887 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1888}
1889
1890
77fdaa12
JB		 1891static enum rx_mgmt_action __must_check
1892ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1893 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1894{
46900298 1895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1896 u16 reason_code;
1897
66e67e41 1898 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1899
66e67e41 1900 if (len < 24 + 2)
77fdaa12
JB		 1901 return RX_MGMT_NONE;
1902
66e67e41 1903 if (!ifmgd->associated ||
b203ca39 1904 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1905 return RX_MGMT_NONE;
f0706e82
JB		 1906
1907 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1908
0ff71613 1909 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1910 sdata->name, mgmt->sa, reason_code);
f0706e82 1911
37ad3888
JB		 1912 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1913
7da7cc1d 1914 mutex_lock(&sdata->local->mtx);
bc83b681 1915 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1916 mutex_unlock(&sdata->local->mtx);
37ad3888 1917
77fdaa12 1918 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1919}
1920
c74d084f
CL		 1921static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1922 u8 *supp_rates, unsigned int supp_rates_len,
1923 u32 *rates, u32 *basic_rates,
1924 bool *have_higher_than_11mbit,
1925 int *min_rate, int *min_rate_index)
1926{
1927 int i, j;
1928
1929 for (i = 0; i < supp_rates_len; i++) {
1930 int rate = (supp_rates[i] & 0x7f) * 5;
1931 bool is_basic = !!(supp_rates[i] & 0x80);
1932
1933 if (rate > 110)
1934 *have_higher_than_11mbit = true;
1935
1936 /*
1937 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1938 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1939 *
1940 * Note: Even through the membership selector and the basic
1941 * rate flag share the same bit, they are not exactly
1942 * the same.
1943 */
1944 if (!!(supp_rates[i] & 0x80) &&
1945 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1946 continue;
1947
1948 for (j = 0; j < sband->n_bitrates; j++) {
1949 if (sband->bitrates[j].bitrate == rate) {
1950 *rates |= BIT(j);
1951 if (is_basic)
1952 *basic_rates |= BIT(j);
1953 if (rate < *min_rate) {
1954 *min_rate = rate;
1955 *min_rate_index = j;
1956 }
1957 break;
1958 }
1959 }
1960 }
1961}
f0706e82 1962
66e67e41
JB		 1963static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1964 bool assoc)
1965{
1966 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1967
1968 lockdep_assert_held(&sdata->u.mgd.mtx);
1969
66e67e41
JB		 1970 if (!assoc) {
1971 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1972
1973 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1974 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1975 }
1976
1977 kfree(assoc_data);
1978 sdata->u.mgd.assoc_data = NULL;
1979}
1980
1981static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1982 struct cfg80211_bss *cbss,
af6b6374 1983 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1984{
46900298 1985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1986 struct ieee80211_local *local = sdata->local;
8318d78a 1987 struct ieee80211_supported_band *sband;
f0706e82 1988 struct sta_info *sta;
af6b6374 1989 u8 *pos;
af6b6374 1990 u16 capab_info, aid;
f0706e82 1991 struct ieee802_11_elems elems;
bda3933a 1992 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1993 u32 changed = 0;
c74d084f 1994 int err;
f0706e82 1995
af6b6374 1996 /* AssocResp and ReassocResp have identical structure */
f0706e82 1997
f0706e82 1998 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1999 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2000
1dd84aa2 2001 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 2002 printk(KERN_DEBUG
2003 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
2004 sdata->name, aid);
1dd84aa2
JB		 2005 aid &= ~(BIT(15) | BIT(14));
2006
05cb9108
JB		 2007 ifmgd->broken_ap = false;
2008
2009 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2010 printk(KERN_DEBUG
2011 "%s: invalid AID value %d (out of range), turn off PS\n",
2012 sdata->name, aid);
2013 aid = 0;
2014 ifmgd->broken_ap = true;
2015 }
2016
af6b6374
JB		 2017 pos = mgmt->u.assoc_resp.variable;
2018 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2019
f0706e82
JB		 2020 if (!elems.supp_rates) {
2021 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 2022 sdata->name);
af6b6374 2023 return false;
f0706e82
JB		 2024 }
2025
46900298 2026 ifmgd->aid = aid;
f0706e82 2027
2a33bee2
GE		 2028 mutex_lock(&sdata->local->sta_mtx);
2029 /*
2030 * station info was already allocated and inserted before
2031 * the association and should be available to us
2032 */
7852e361 2033 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2034 if (WARN_ON(!sta)) {
2035 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2036 return false;
77fdaa12 2037 }
05e5e883 2038
66e67e41 2039 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2040
ab1faead 2041 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2042 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2043 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2044
64f68e5d
JB		 2045 sta->supports_40mhz =
2046 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2047
4b7679a5 2048 rate_control_rate_init(sta);
f0706e82 2049
46900298 2050 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2051 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2052
ddf4ac53 2053 if (elems.wmm_param)
c2c98fde 2054 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2055
c8987876
JB		 2056 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2057 if (!err)
2058 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2059 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2060 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2061 if (err) {
2062 printk(KERN_DEBUG
2063 "%s: failed to move station %pM to desired state\n",
2064 sdata->name, sta->sta.addr);
2065 WARN_ON(__sta_info_destroy(sta));
2066 mutex_unlock(&sdata->local->sta_mtx);
2067 return false;
2068 }
2069
7852e361 2070 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2071
f2176d72
JO		 2072 /*
2073 * Always handle WMM once after association regardless
2074 * of the first value the AP uses. Setting -1 here has
2075 * that effect because the AP values is an unsigned
2076 * 4-bit value.
2077 */
2078 ifmgd->wmm_last_param_set = -1;
2079
ddf4ac53 2080 if (elems.wmm_param)
4ced3f74 2081 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2082 elems.wmm_param_len);
aa837e1d 2083 else
3abead59
JB		 2084 ieee80211_set_wmm_default(sdata, false);
2085 changed |= BSS_CHANGED_QOS;
f0706e82 2086
074d46d1 2087 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2088 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2089 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2090 cbss->bssid, false);
ae5eb026 2091
60f8b39c
JB		 2092 /* set AID and assoc capability,
2093 * ieee80211_set_associated() will tell the driver */
2094 bss_conf->aid = aid;
2095 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2096 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2097
d524215f
FF		 2098 /*
2099 * If we're using 4-addr mode, let the AP know that we're
2100 * doing so, so that it can create the STA VLAN on its side
2101 */
2102 if (ifmgd->use_4addr)
2103 ieee80211_send_4addr_nullfunc(local, sdata);
2104
15b7b062 2105 /*
b291ba11
JB		 2106 * Start timer to probe the connection to the AP now.
2107 * Also start the timer that will detect beacon loss.
15b7b062 2108 */
b291ba11 2109 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2110 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2111
af6b6374 2112 return true;
f0706e82
JB		 2113}
2114
66e67e41
JB		 2115static enum rx_mgmt_action __must_check
2116ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2117 struct ieee80211_mgmt *mgmt, size_t len,
2118 struct cfg80211_bss **bss)
2119{
2120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2121 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2122 u16 capab_info, status_code, aid;
2123 struct ieee802_11_elems elems;
2124 u8 *pos;
2125 bool reassoc;
2126
2127 lockdep_assert_held(&ifmgd->mtx);
2128
2129 if (!assoc_data)
2130 return RX_MGMT_NONE;
b203ca39 2131 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2132 return RX_MGMT_NONE;
2133
2134 /*
2135 * AssocResp and ReassocResp have identical structure, so process both
2136 * of them in this function.
2137 */
2138
2139 if (len < 24 + 6)
2140 return RX_MGMT_NONE;
2141
2142 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2143 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2144 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2145 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2146
2147 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2148 "status=%d aid=%d)\n",
2149 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2150 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2151
2152 pos = mgmt->u.assoc_resp.variable;
2153 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2154
2155 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2156 elems.timeout_int && elems.timeout_int_len == 5 &&
2157 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2158 u32 tu, ms;
2159 tu = get_unaligned_le32(elems.timeout_int + 1);
2160 ms = tu * 1024 / 1000;
2161 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2162 "comeback duration %u TU (%u ms)\n",
2163 sdata->name, mgmt->sa, tu, ms);
2164 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2165 if (ms > IEEE80211_ASSOC_TIMEOUT)
2166 run_again(ifmgd, assoc_data->timeout);
2167 return RX_MGMT_NONE;
2168 }
2169
2170 *bss = assoc_data->bss;
2171
2172 if (status_code != WLAN_STATUS_SUCCESS) {
2173 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2174 sdata->name, mgmt->sa, status_code);
2175 ieee80211_destroy_assoc_data(sdata, false);
2176 } else {
66e67e41
JB		 2177 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2178 /* oops -- internal error -- send timeout for now */
10a9109f 2179 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2180 cfg80211_put_bss(*bss);
2181 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2182 }
10a9109f 2183 printk(KERN_DEBUG "%s: associated\n", sdata->name);
79ebfb85
JB		 2184
2185 /*
2186 * destroy assoc_data afterwards, as otherwise an idle
2187 * recalc after assoc_data is NULL but before associated
2188 * is set can cause the interface to go idle
2189 */
2190 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2191 }
2192
2193 return RX_MGMT_CFG80211_RX_ASSOC;
2194}
98c8fccf
JB		 2195static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2196 struct ieee80211_mgmt *mgmt,
2197 size_t len,
2198 struct ieee80211_rx_status *rx_status,
2199 struct ieee802_11_elems *elems,
2200 bool beacon)
2201{
2202 struct ieee80211_local *local = sdata->local;
2203 int freq;
c2b13452 2204 struct ieee80211_bss *bss;
98c8fccf 2205 struct ieee80211_channel *channel;
56007a02
JB		 2206 bool need_ps = false;
2207
66e67e41 2208 if (sdata->u.mgd.associated &&
b203ca39 2209 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2210 bss = (void *)sdata->u.mgd.associated->priv;
2211 /* not previously set so we may need to recalc */
2212 need_ps = !bss->dtim_period;
2213 }
98c8fccf
JB		 2214
2215 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2216 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2217 rx_status->band);
98c8fccf
JB		 2218 else
2219 freq = rx_status->freq;
2220
2221 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2222
2223 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2224 return;
2225
98c8fccf 2226 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2227 channel, beacon);
77fdaa12
JB		 2228 if (bss)
2229 ieee80211_rx_bss_put(local, bss);
2230
2231 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2232 return;
2233
56007a02
JB		 2234 if (need_ps) {
2235 mutex_lock(&local->iflist_mtx);
2236 ieee80211_recalc_ps(local, -1);
2237 mutex_unlock(&local->iflist_mtx);
2238 }
2239
c481ec97 2240 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2241 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2242 ETH_ALEN) == 0)) {
c481ec97
S		 2243 struct ieee80211_channel_sw_ie *sw_elem =
2244 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2245 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2246 bss, rx_status->mactime);
c481ec97 2247 }
f0706e82
JB		 2248}
2249
2250
f698d856 2251static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2252 struct sk_buff *skb)
f0706e82 2253{
af6b6374 2254 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2255 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2256 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2257 size_t baselen, len = skb->len;
ae6a44e3
EK		 2258 struct ieee802_11_elems elems;
2259
15b7b062
KV		 2260 ifmgd = &sdata->u.mgd;
2261
77fdaa12
JB		 2262 ASSERT_MGD_MTX(ifmgd);
2263
b203ca39 2264 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2265 return; /* ignore ProbeResp to foreign address */
2266
ae6a44e3
EK		 2267 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2268 if (baselen > len)
2269 return;
2270
2271 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2272 &elems);
2273
98c8fccf 2274 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2275
77fdaa12 2276 if (ifmgd->associated &&
b203ca39 2277 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2278 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2279
2280 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2281 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41
JB		 2282 /* got probe response, continue with auth */
2283 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2284 ifmgd->auth_data->tries = 0;
2285 ifmgd->auth_data->timeout = jiffies;
2286 run_again(ifmgd, ifmgd->auth_data->timeout);
2287 }
f0706e82
JB		 2288}
2289
d91f36db
JB		 2290/*
2291 * This is the canonical list of information elements we care about,
2292 * the filter code also gives us all changes to the Microsoft OUI
2293 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2294 *
2295 * We implement beacon filtering in software since that means we can
2296 * avoid processing the frame here and in cfg80211, and userspace
2297 * will not be able to tell whether the hardware supports it or not.
2298 *
2299 * XXX: This list needs to be dynamic -- userspace needs to be able to
2300 * add items it requires. It also needs to be able to tell us to
2301 * look out for other vendor IEs.
2302 */
2303static const u64 care_about_ies =
1d4df3a5
JB		 2304 (1ULL << WLAN_EID_COUNTRY) |
2305 (1ULL << WLAN_EID_ERP_INFO) |
2306 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2307 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2308 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2309 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2310
f698d856 2311static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2312 struct ieee80211_mgmt *mgmt,
2313 size_t len,
2314 struct ieee80211_rx_status *rx_status)
2315{
d91f36db 2316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2317 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2318 size_t baselen;
2319 struct ieee802_11_elems elems;
f698d856 2320 struct ieee80211_local *local = sdata->local;
471b3efd 2321 u32 changed = 0;
d91f36db 2322 bool erp_valid, directed_tim = false;
7a5158ef 2323 u8 erp_value = 0;
d91f36db 2324 u32 ncrc;
77fdaa12
JB		 2325 u8 *bssid;
2326
66e67e41 2327 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2328
ae6a44e3
EK		 2329 /* Process beacon from the current BSS */
2330 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2331 if (baselen > len)
2332 return;
2333
d91f36db 2334 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2335 return;
f0706e82 2336
66e67e41 2337 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2338 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2339 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2340 len - baselen, &elems);
77fdaa12 2341
66e67e41
JB		 2342 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2343 false);
2344 ifmgd->assoc_data->have_beacon = true;
2345 ifmgd->assoc_data->sent_assoc = false;
2346 /* continue assoc process */
2347 ifmgd->assoc_data->timeout = jiffies;
2348 run_again(ifmgd, ifmgd->assoc_data->timeout);
2349 return;
2350 }
77fdaa12 2351
66e67e41 2352 if (!ifmgd->associated ||
b203ca39 2353 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2354 return;
66e67e41 2355 bssid = ifmgd->associated->bssid;
f0706e82 2356
17e4ec14
JM		 2357 /* Track average RSSI from the Beacon frames of the current AP */
2358 ifmgd->last_beacon_signal = rx_status->signal;
2359 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2360 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2361 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2362 ifmgd->last_cqm_event_signal = 0;
391a200a 2363 ifmgd->count_beacon_signal = 1;
615f7b9b 2364 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2365 } else {
2366 ifmgd->ave_beacon_signal =
2367 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2368 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2369 ifmgd->ave_beacon_signal) / 16;
391a200a 2370 ifmgd->count_beacon_signal++;
17e4ec14 2371 }
615f7b9b
MV		 2372
2373 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2374 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2375 int sig = ifmgd->ave_beacon_signal;
2376 int last_sig = ifmgd->last_ave_beacon_signal;
2377
2378 /*
2379 * if signal crosses either of the boundaries, invoke callback
2380 * with appropriate parameters
2381 */
2382 if (sig > ifmgd->rssi_max_thold &&
2383 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2384 ifmgd->last_ave_beacon_signal = sig;
2385 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2386 } else if (sig < ifmgd->rssi_min_thold &&
2387 (last_sig >= ifmgd->rssi_max_thold ||
2388 last_sig == 0)) {
2389 ifmgd->last_ave_beacon_signal = sig;
2390 drv_rssi_callback(local, RSSI_EVENT_LOW);
2391 }
2392 }
2393
17e4ec14 2394 if (bss_conf->cqm_rssi_thold &&
391a200a 2395 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2396 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2397 int sig = ifmgd->ave_beacon_signal / 16;
2398 int last_event = ifmgd->last_cqm_event_signal;
2399 int thold = bss_conf->cqm_rssi_thold;
2400 int hyst = bss_conf->cqm_rssi_hyst;
2401 if (sig < thold &&
2402 (last_event == 0 || sig < last_event - hyst)) {
2403 ifmgd->last_cqm_event_signal = sig;
2404 ieee80211_cqm_rssi_notify(
2405 &sdata->vif,
2406 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2407 GFP_KERNEL);
2408 } else if (sig > thold &&
2409 (last_event == 0 || sig > last_event + hyst)) {
2410 ifmgd->last_cqm_event_signal = sig;
2411 ieee80211_cqm_rssi_notify(
2412 &sdata->vif,
2413 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2414 GFP_KERNEL);
2415 }
2416 }
2417
b291ba11 2418 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180 2419#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 2420 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2421 sdata->name);
92778180 2422#endif
925e64c3 2423 mutex_lock(&local->mtx);
b291ba11 2424 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2425 ieee80211_run_deferred_scan(local);
2426 mutex_unlock(&local->mtx);
2427
4e751843
JB		 2428 mutex_lock(&local->iflist_mtx);
2429 ieee80211_recalc_ps(local, -1);
2430 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2431 }
2432
b291ba11
JB		 2433 /*
2434 * Push the beacon loss detection into the future since
2435 * we are processing a beacon from the AP just now.
2436 */
d3a910a8 2437 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2438
d91f36db
JB		 2439 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2440 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2441 len - baselen, &elems,
2442 care_about_ies, ncrc);
2443
2444 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2445 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2446 ifmgd->aid);
d91f36db 2447
d8ec4433 2448 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2449 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2450 true);
d91f36db 2451
4ced3f74 2452 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2453 elems.wmm_param_len);
2454 }
fe3fa827 2455
25c9c875 2456 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2457 if (directed_tim) {
572e0012 2458 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2459 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2460 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2461 ieee80211_hw_config(local,
2462 IEEE80211_CONF_CHANGE_PS);
2463 }
572e0012 2464 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2465 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2466 local->pspolling = true;
2467
2468 /*
2469 * Here is assumed that the driver will be
2470 * able to send ps-poll frame and receive a
2471 * response even though power save mode is
2472 * enabled, but some drivers might require
2473 * to disable power save here. This needs
2474 * to be investigated.
2475 */
2476 ieee80211_send_pspoll(local, sdata);
2477 }
a97b77b9
VN		 2478 }
2479 }
7a5158ef 2480
d8ec4433 2481 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2482 return;
2483 ifmgd->beacon_crc = ncrc;
d8ec4433 2484 ifmgd->beacon_crc_valid = true;
30196673 2485
7a5158ef
JB		 2486 if (elems.erp_info && elems.erp_info_len >= 1) {
2487 erp_valid = true;
2488 erp_value = elems.erp_info[0];
2489 } else {
2490 erp_valid = false;
50c4afb9 2491 }
7a5158ef
JB		 2492 changed |= ieee80211_handle_bss_capability(sdata,
2493 le16_to_cpu(mgmt->u.beacon.capab_info),
2494 erp_valid, erp_value);
f0706e82 2495
d3c990fb 2496
074d46d1 2497 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2498 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2499 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2500
2501 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2502
24398e39
JB		 2503 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2504 bssid, true);
d3c990fb
RR		 2505 }
2506
8b19e6ca 2507 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2508 if (elems.country_elem) {
a8302de9
VT		 2509 /* TODO: IBSS also needs this */
2510 if (elems.pwr_constr_elem)
2511 ieee80211_handle_pwr_constr(sdata,
2512 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2513 elems.pwr_constr_elem,
2514 elems.pwr_constr_elem_len);
3f2355cb
LR		 2515 }
2516
471b3efd 2517 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2518}
2519
1fa57d01
JB		 2520void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2521 struct sk_buff *skb)
f0706e82 2522{
77fdaa12 2523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2524 struct ieee80211_rx_status *rx_status;
f0706e82 2525 struct ieee80211_mgmt *mgmt;
66e67e41 2526 struct cfg80211_bss *bss = NULL;
77fdaa12 2527 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2528 u16 fc;
2529
f0706e82
JB		 2530 rx_status = (struct ieee80211_rx_status *) skb->cb;
2531 mgmt = (struct ieee80211_mgmt *) skb->data;
2532 fc = le16_to_cpu(mgmt->frame_control);
2533
77fdaa12
JB		 2534 mutex_lock(&ifmgd->mtx);
2535
66e67e41
JB		 2536 switch (fc & IEEE80211_FCTL_STYPE) {
2537 case IEEE80211_STYPE_BEACON:
2538 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2539 break;
2540 case IEEE80211_STYPE_PROBE_RESP:
2541 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2542 break;
2543 case IEEE80211_STYPE_AUTH:
2544 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2545 break;
2546 case IEEE80211_STYPE_DEAUTH:
2547 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2548 break;
2549 case IEEE80211_STYPE_DISASSOC:
2550 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2551 break;
2552 case IEEE80211_STYPE_ASSOC_RESP:
2553 case IEEE80211_STYPE_REASSOC_RESP:
2554 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2555 break;
2556 case IEEE80211_STYPE_ACTION:
2557 switch (mgmt->u.action.category) {
2558 case WLAN_CATEGORY_SPECTRUM_MGMT:
2559 ieee80211_sta_process_chanswitch(sdata,
2560 &mgmt->u.action.u.chan_switch.sw_elem,
2561 (void *)ifmgd->associated->priv,
2562 rx_status->mactime);
77fdaa12 2563 break;
77fdaa12 2564 }
77fdaa12 2565 }
77fdaa12
JB		 2566 mutex_unlock(&ifmgd->mtx);
2567
66e67e41
JB		 2568 switch (rma) {
2569 case RX_MGMT_NONE:
2570 /* no action */
2571 break;
2572 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2573 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2574 break;
2575 case RX_MGMT_CFG80211_DISASSOC:
2576 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2577 break;
2578 case RX_MGMT_CFG80211_RX_AUTH:
2579 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2580 break;
2581 case RX_MGMT_CFG80211_RX_ASSOC:
2582 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2583 break;
2584 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2585 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2586 break;
2587 default:
2588 WARN(1, "unexpected: %d", rma);
b054b747 2589 }
f0706e82
JB		 2590}
2591
9c6bd790 2592static void ieee80211_sta_timer(unsigned long data)
f0706e82 2593{
60f8b39c
JB		 2594 struct ieee80211_sub_if_data *sdata =
2595 (struct ieee80211_sub_if_data *) data;
46900298 2596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2597 struct ieee80211_local *local = sdata->local;
f0706e82 2598
5bb644a0
JB		 2599 if (local->quiescing) {
2600 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2601 return;
2602 }
2603
64592c8f 2604 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2605}
2606
04ac3c0e 2607static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2608 u8 *bssid, u8 reason)
04ac3c0e
FF		 2609{
2610 struct ieee80211_local *local = sdata->local;
2611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2612 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2613
37ad3888
JB		 2614 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2615 false, frame_buf);
04ac3c0e 2616 mutex_unlock(&ifmgd->mtx);
37ad3888 2617
04ac3c0e
FF		 2618 /*
2619 * must be outside lock due to cfg80211,
2620 * but that's not a problem.
2621 */
5fef7dbc 2622 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2623
2624 mutex_lock(&local->mtx);
2625 ieee80211_recalc_idle(local);
2626 mutex_unlock(&local->mtx);
2627
04ac3c0e
FF		 2628 mutex_lock(&ifmgd->mtx);
2629}
2630
66e67e41
JB		 2631static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2632{
2633 struct ieee80211_local *local = sdata->local;
2634 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2635 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2636
2637 lockdep_assert_held(&ifmgd->mtx);
2638
2639 if (WARN_ON_ONCE(!auth_data))
2640 return -EINVAL;
2641
66e67e41
JB		 2642 auth_data->tries++;
2643
2644 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2645 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2646 sdata->name, auth_data->bss->bssid);
2647
2648 /*
2649 * Most likely AP is not in the range so remove the
2650 * bss struct for that AP.
2651 */
2652 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2653
2654 return -ETIMEDOUT;
2655 }
2656
2657 if (auth_data->bss->proberesp_ies) {
2658 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2659 sdata->name, auth_data->bss->bssid, auth_data->tries,
2660 IEEE80211_AUTH_MAX_TRIES);
2661
2662 auth_data->expected_transaction = 2;
2663 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2664 auth_data->ie, auth_data->ie_len,
2665 auth_data->bss->bssid,
2666 auth_data->bss->bssid, NULL, 0, 0);
2667 } else {
2668 const u8 *ssidie;
2669
2670 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2671 sdata->name, auth_data->bss->bssid, auth_data->tries,
2672 IEEE80211_AUTH_MAX_TRIES);
2673
2674 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2675 if (!ssidie)
2676 return -EINVAL;
2677 /*
2678 * Direct probe is sent to broadcast address as some APs
2679 * will not answer to direct packet in unassociated state.
2680 */
2681 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2682 NULL, 0, (u32) -1, true, false);
2683 }
2684
2685 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2686 run_again(ifmgd, auth_data->timeout);
2687
2688 return 0;
2689}
2690
2691static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2692{
2693 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2694 struct ieee80211_local *local = sdata->local;
2695
2696 lockdep_assert_held(&sdata->u.mgd.mtx);
2697
66e67e41
JB		 2698 assoc_data->tries++;
2699 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2700 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2701 sdata->name, assoc_data->bss->bssid);
2702
2703 /*
2704 * Most likely AP is not in the range so remove the
2705 * bss struct for that AP.
2706 */
2707 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2708
2709 return -ETIMEDOUT;
2710 }
2711
2712 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2713 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2714 IEEE80211_ASSOC_MAX_TRIES);
2715 ieee80211_send_assoc(sdata);
2716
2717 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2718 run_again(&sdata->u.mgd, assoc_data->timeout);
2719
2720 return 0;
2721}
2722
1fa57d01 2723void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2724{
9c6bd790 2725 struct ieee80211_local *local = sdata->local;
1fa57d01 2726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2727
77fdaa12
JB		 2728 mutex_lock(&ifmgd->mtx);
2729
66e67e41
JB		 2730 if (ifmgd->auth_data &&
2731 time_after(jiffies, ifmgd->auth_data->timeout)) {
2732 if (ifmgd->auth_data->done) {
2733 /*
2734 * ok ... we waited for assoc but userspace didn't,
2735 * so let's just kill the auth data
2736 */
2737 ieee80211_destroy_auth_data(sdata, false);
2738 } else if (ieee80211_probe_auth(sdata)) {
2739 u8 bssid[ETH_ALEN];
2740
2741 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2742
2743 ieee80211_destroy_auth_data(sdata, false);
2744
2745 mutex_unlock(&ifmgd->mtx);
2746 cfg80211_send_auth_timeout(sdata->dev, bssid);
2747 mutex_lock(&ifmgd->mtx);
2748 }
2749 } else if (ifmgd->auth_data)
2750 run_again(ifmgd, ifmgd->auth_data->timeout);
2751
2752 if (ifmgd->assoc_data &&
2753 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2754 if (!ifmgd->assoc_data->have_beacon ||
2755 ieee80211_do_assoc(sdata)) {
2756 u8 bssid[ETH_ALEN];
2757
2758 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2759
2760 ieee80211_destroy_assoc_data(sdata, false);
2761
2762 mutex_unlock(&ifmgd->mtx);
2763 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2764 mutex_lock(&ifmgd->mtx);
2765 }
2766 } else if (ifmgd->assoc_data)
2767 run_again(ifmgd, ifmgd->assoc_data->timeout);
2768
b291ba11
JB		 2769 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2770 IEEE80211_STA_CONNECTION_POLL) &&
2771 ifmgd->associated) {
a43abf29 2772 u8 bssid[ETH_ALEN];
72a8a3ed 2773 int max_tries;
a43abf29 2774
0c1ad2ca 2775 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2776
72a8a3ed 2777 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2778 max_tries = max_nullfunc_tries;
72a8a3ed 2779 else
180205bd 2780 max_tries = max_probe_tries;
72a8a3ed 2781
4e5ff376
FF		 2782 /* ACK received for nullfunc probing frame */
2783 if (!ifmgd->probe_send_count)
2784 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2785 else if (ifmgd->nullfunc_failed) {
2786 if (ifmgd->probe_send_count < max_tries) {
2787#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2788 wiphy_debug(local->hw.wiphy,
2789 "%s: No ack for nullfunc frame to"
bfc31df3 2790 " AP %pM, try %d/%i\n",
04ac3c0e 2791 sdata->name, bssid,
bfc31df3 2792 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2793#endif
2794 ieee80211_mgd_probe_ap_send(sdata);
2795 } else {
2796#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2797 wiphy_debug(local->hw.wiphy,
2798 "%s: No ack for nullfunc frame to"
2799 " AP %pM, disconnecting.\n",
c658e5db 2800 sdata->name, bssid);
04ac3c0e 2801#endif
95acac61
JB		 2802 ieee80211_sta_connection_lost(sdata, bssid,
2803 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2804 }
2805 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2806 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2807 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2808#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2809 wiphy_debug(local->hw.wiphy,
2810 "%s: Failed to send nullfunc to AP %pM"
2811 " after %dms, disconnecting.\n",
2812 sdata->name,
180205bd 2813 bssid, probe_wait_ms);
04ac3c0e 2814#endif
95acac61
JB		 2815 ieee80211_sta_connection_lost(sdata, bssid,
2816 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2817 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2818#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2819 wiphy_debug(local->hw.wiphy,
2820 "%s: No probe response from AP %pM"
bfc31df3 2821 " after %dms, try %d/%i\n",
b38afa87 2822 sdata->name,
180205bd 2823 bssid, probe_wait_ms,
bfc31df3 2824 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2825#endif
2826 ieee80211_mgd_probe_ap_send(sdata);
2827 } else {
b291ba11
JB		 2828 /*
2829 * We actually lost the connection ... or did we?
2830 * Let's make sure!
2831 */
b38afa87
BG		 2832 wiphy_debug(local->hw.wiphy,
2833 "%s: No probe response from AP %pM"
2834 " after %dms, disconnecting.\n",
2835 sdata->name,
180205bd 2836 bssid, probe_wait_ms);
04ac3c0e 2837
95acac61
JB		 2838 ieee80211_sta_connection_lost(sdata, bssid,
2839 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2840 }
2841 }
2842
77fdaa12 2843 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2844
2845 mutex_lock(&local->mtx);
2846 ieee80211_recalc_idle(local);
2847 mutex_unlock(&local->mtx);
f0706e82
JB		 2848}
2849
b291ba11
JB		 2850static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2851{
2852 struct ieee80211_sub_if_data *sdata =
2853 (struct ieee80211_sub_if_data *) data;
2854 struct ieee80211_local *local = sdata->local;
2855
2856 if (local->quiescing)
2857 return;
2858
1e4dcd01
JO		 2859 ieee80211_queue_work(&sdata->local->hw,
2860 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2861}
2862
2863static void ieee80211_sta_conn_mon_timer(unsigned long data)
2864{
2865 struct ieee80211_sub_if_data *sdata =
2866 (struct ieee80211_sub_if_data *) data;
2867 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2868 struct ieee80211_local *local = sdata->local;
2869
2870 if (local->quiescing)
2871 return;
2872
42935eca 2873 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2874}
2875
2876static void ieee80211_sta_monitor_work(struct work_struct *work)
2877{
2878 struct ieee80211_sub_if_data *sdata =
2879 container_of(work, struct ieee80211_sub_if_data,
2880 u.mgd.monitor_work);
2881
2882 ieee80211_mgd_probe_ap(sdata, false);
2883}
2884
9c6bd790
JB		 2885static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2886{
494f1fe5
EP		 2887 u32 flags;
2888
ad935687 2889 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2890 __ieee80211_stop_poll(sdata);
ad935687 2891
b291ba11 2892 /* let's probe the connection once */
494f1fe5
EP		 2893 flags = sdata->local->hw.flags;
2894 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2895 ieee80211_queue_work(&sdata->local->hw,
2896 &sdata->u.mgd.monitor_work);
b291ba11 2897 /* and do all the other regular work too */
64592c8f 2898 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2899 }
9c6bd790 2900}
f0706e82 2901
5bb644a0
JB		 2902#ifdef CONFIG_PM
2903void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2904{
2905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2906
2907 /*
2908 * we need to use atomic bitops for the running bits
2909 * only because both timers might fire at the same
2910 * time -- the code here is properly synchronised.
2911 */
2912
d1f5b7a3
JB		 2913 cancel_work_sync(&ifmgd->request_smps_work);
2914
0ecfe806 2915 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2916 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2917 if (del_timer_sync(&ifmgd->timer))
2918 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2919
2920 cancel_work_sync(&ifmgd->chswitch_work);
2921 if (del_timer_sync(&ifmgd->chswitch_timer))
2922 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2923
b291ba11
JB		 2924 /* these will just be re-established on connection */
2925 del_timer_sync(&ifmgd->conn_mon_timer);
2926 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2927}
2928
2929void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2930{
2931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2932
676b58c2
RM		 2933 if (!ifmgd->associated)
2934 return;
2935
95acac61
JB		 2936 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2937 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2938 mutex_lock(&ifmgd->mtx);
2939 if (ifmgd->associated) {
2940#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2941 wiphy_debug(sdata->local->hw.wiphy,
2942 "%s: driver requested disconnect after resume.\n",
2943 sdata->name);
2944#endif
2945 ieee80211_sta_connection_lost(sdata,
2946 ifmgd->associated->bssid,
2947 WLAN_REASON_UNSPECIFIED);
2948 mutex_unlock(&ifmgd->mtx);
2949 return;
2950 }
2951 mutex_unlock(&ifmgd->mtx);
2952 }
2953
5bb644a0
JB		 2954 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2955 add_timer(&ifmgd->timer);
2956 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2957 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2958 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2959
2960 mutex_lock(&sdata->local->mtx);
46090979 2961 ieee80211_restart_sta_timer(sdata);
925e64c3 2962 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2963}
2964#endif
2965
9c6bd790
JB		 2966/* interface setup */
2967void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2968{
46900298 2969 struct ieee80211_if_managed *ifmgd;
988c0f72 2970
46900298 2971 ifmgd = &sdata->u.mgd;
b291ba11 2972 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2973 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2974 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2975 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2976 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2977 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2978 (unsigned long) sdata);
b291ba11
JB		 2979 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2980 (unsigned long) sdata);
2981 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2982 (unsigned long) sdata);
46900298 2983 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2984 (unsigned long) sdata);
9c6bd790 2985
ab1faead 2986 ifmgd->flags = 0;
1478acb3 2987 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2988 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2989 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2990
77fdaa12 2991 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2992
2993 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2994 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2995 else
2996 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2997}
2998
77fdaa12
JB		 2999/* scan finished notification */
3000void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3001{
77fdaa12 3002 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 3003
77fdaa12
JB		 3004 /* Restart STA timers */
3005 rcu_read_lock();
3006 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3007 ieee80211_restart_sta_timer(sdata);
3008 rcu_read_unlock();
3009}
60f8b39c 3010
77fdaa12
JB		 3011int ieee80211_max_network_latency(struct notifier_block *nb,
3012 unsigned long data, void *dummy)
3013{
3014 s32 latency_usec = (s32) data;
3015 struct ieee80211_local *local =
3016 container_of(nb, struct ieee80211_local,
3017 network_latency_notifier);
1fa6f4af 3018
77fdaa12
JB		 3019 mutex_lock(&local->iflist_mtx);
3020 ieee80211_recalc_ps(local, latency_usec);
3021 mutex_unlock(&local->iflist_mtx);
dfe67012 3022
77fdaa12 3023 return 0;
9c6bd790
JB		 3024}
3025
a1cf775d 3026static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 3027 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 3028{
3029 struct ieee80211_local *local = sdata->local;
3030 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3031 struct ieee80211_bss *bss = (void *)cbss->priv;
a1cf775d
JB		 3032 struct sta_info *sta;
3033 bool have_sta = false;
3034 int err;
24398e39
JB		 3035 int ht_cfreq;
3036 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3037 const u8 *ht_oper_ie;
3038 const struct ieee80211_ht_operation *ht_oper = NULL;
3039 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3040
3041 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3042 return -EINVAL;
3043
3044 if (assoc) {
3045 rcu_read_lock();
5d6a1b06 3046 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3047 rcu_read_unlock();
3048 }
3049
3050 if (!have_sta) {
5d6a1b06 3051 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3052 if (!sta)
3053 return -ENOMEM;
3054 }
3055
3056 mutex_lock(&local->mtx);
3057 ieee80211_recalc_idle(sdata->local);
3058 mutex_unlock(&local->mtx);
3059
3060 /* switch to the right channel */
24398e39
JB		 3061 sband = local->hw.wiphy->bands[cbss->channel->band];
3062
3063 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3064
3065 if (sband->ht_cap.ht_supported) {
3066 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3067 cbss->information_elements,
3068 cbss->len_information_elements);
3069 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3070 ht_oper = (void *)(ht_oper_ie + 2);
3071 }
3072
3073 if (ht_oper) {
3074 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3075 cbss->channel->band);
3076 /* check that channel matches the right operating channel */
3077 if (cbss->channel->center_freq != ht_cfreq) {
3078 /*
3079 * It's possible that some APs are confused here;
3080 * Netgear WNDR3700 sometimes reports 4 higher than
3081 * the actual channel in association responses, but
3082 * since we look at probe response/beacon data here
3083 * it should be OK.
3084 */
3085 printk(KERN_DEBUG
3086 "%s: Wrong control channel: center-freq: %d"
3087 " ht-cfreq: %d ht->primary_chan: %d"
3088 " band: %d. Disabling HT.\n",
3089 sdata->name, cbss->channel->center_freq,
3090 ht_cfreq, ht_oper->primary_chan,
3091 cbss->channel->band);
3092 ht_oper = NULL;
3093 }
3094 }
3095
3096 if (ht_oper) {
3097 channel_type = NL80211_CHAN_HT20;
3098
3099 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3100 switch (ht_oper->ht_param &
3101 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3102 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3103 channel_type = NL80211_CHAN_HT40PLUS;
3104 break;
3105 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3106 channel_type = NL80211_CHAN_HT40MINUS;
3107 break;
3108 }
3109 }
3110 }
3111
3112 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3113 /* can only fail due to HT40+/- mismatch */
3114 channel_type = NL80211_CHAN_HT20;
3115 printk(KERN_DEBUG
3116 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3117 sdata->name);
3118 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3119 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3120 channel_type));
3121 }
3122
5d6a1b06 3123 local->oper_channel = cbss->channel;
6aee4ca3 3124 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
a1cf775d
JB		 3125
3126 if (!have_sta) {
5d6a1b06
JB		 3127 u32 rates = 0, basic_rates = 0;
3128 bool have_higher_than_11mbit;
3129 int min_rate = INT_MAX, min_rate_index = -1;
3130
5d6a1b06
JB		 3131 ieee80211_get_rates(sband, bss->supp_rates,
3132 bss->supp_rates_len,
3133 &rates, &basic_rates,
3134 &have_higher_than_11mbit,
3135 &min_rate, &min_rate_index);
3136
3137 /*
3138 * This used to be a workaround for basic rates missing
3139 * in the association response frame. Now that we no
3140 * longer use the basic rates from there, it probably
3141 * doesn't happen any more, but keep the workaround so
3142 * in case some *other* APs are buggy in different ways
3143 * we can connect -- with a warning.
3144 */
3145 if (!basic_rates && min_rate_index >= 0) {
3146 printk(KERN_DEBUG
3147 "%s: No basic rates, using min rate instead.\n",
3148 sdata->name);
3149 basic_rates = BIT(min_rate_index);
3150 }
3151
3152 sta->sta.supp_rates[cbss->channel->band] = rates;
3153 sdata->vif.bss_conf.basic_rates = basic_rates;
3154
3155 /* cf. IEEE 802.11 9.2.12 */
3156 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3157 have_higher_than_11mbit)
3158 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3159 else
3160 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3161
3162 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3163
3164 /* tell driver about BSSID and basic rates */
3165 ieee80211_bss_info_change_notify(sdata,
3166 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3167
3168 if (assoc)
3169 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3170
3171 err = sta_info_insert(sta);
3172 sta = NULL;
3173 if (err) {
3174 printk(KERN_DEBUG
3175 "%s: failed to insert STA entry for the AP (error %d)\n",
3176 sdata->name, err);
3177 return err;
3178 }
3179 } else
b203ca39 3180 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3181
3182 return 0;
3183}
3184
77fdaa12
JB		 3185/* config hooks */
3186int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3187 struct cfg80211_auth_request *req)
9c6bd790 3188{
66e67e41
JB		 3189 struct ieee80211_local *local = sdata->local;
3190 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3191 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3192 u16 auth_alg;
66e67e41
JB		 3193 int err;
3194
3195 /* prepare auth data structure */
9c6bd790 3196
77fdaa12
JB		 3197 switch (req->auth_type) {
3198 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3199 auth_alg = WLAN_AUTH_OPEN;
3200 break;
3201 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3202 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3203 return -EOPNOTSUPP;
77fdaa12
JB		 3204 auth_alg = WLAN_AUTH_SHARED_KEY;
3205 break;
3206 case NL80211_AUTHTYPE_FT:
3207 auth_alg = WLAN_AUTH_FT;
3208 break;
3209 case NL80211_AUTHTYPE_NETWORK_EAP:
3210 auth_alg = WLAN_AUTH_LEAP;
3211 break;
3212 default:
3213 return -EOPNOTSUPP;
60f8b39c 3214 }
77fdaa12 3215
66e67e41
JB		 3216 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3217 if (!auth_data)
9c6bd790 3218 return -ENOMEM;
77fdaa12 3219
66e67e41 3220 auth_data->bss = req->bss;
77fdaa12
JB		 3221
3222 if (req->ie && req->ie_len) {
66e67e41
JB		 3223 memcpy(auth_data->ie, req->ie, req->ie_len);
3224 auth_data->ie_len = req->ie_len;
9c6bd790 3225 }
77fdaa12 3226
fffd0934 3227 if (req->key && req->key_len) {
66e67e41
JB		 3228 auth_data->key_len = req->key_len;
3229 auth_data->key_idx = req->key_idx;
3230 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3231 }
3232
66e67e41 3233 auth_data->algorithm = auth_alg;
60f8b39c 3234
66e67e41 3235 /* try to authenticate/probe */
2a33bee2 3236
66e67e41 3237 mutex_lock(&ifmgd->mtx);
2a33bee2 3238
66e67e41
JB		 3239 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3240 ifmgd->assoc_data) {
3241 err = -EBUSY;
3242 goto err_free;
2a33bee2
GE		 3243 }
3244
66e67e41
JB		 3245 if (ifmgd->auth_data)
3246 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3247
66e67e41
JB		 3248 /* prep auth_data so we don't go into idle on disassoc */
3249 ifmgd->auth_data = auth_data;
af6b6374 3250
66e67e41 3251 if (ifmgd->associated)
37ad3888 3252 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3253
66e67e41
JB		 3254 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3255 sdata->name, req->bss->bssid);
e5b900d2 3256
a1cf775d
JB		 3257 err = ieee80211_prep_connection(sdata, req->bss, false);
3258 if (err)
66e67e41 3259 goto err_clear;
af6b6374 3260
66e67e41
JB		 3261 err = ieee80211_probe_auth(sdata);
3262 if (err) {
66e67e41
JB		 3263 sta_info_destroy_addr(sdata, req->bss->bssid);
3264 goto err_clear;
3265 }
3266
3267 /* hold our own reference */
3268 cfg80211_ref_bss(auth_data->bss);
3269 err = 0;
3270 goto out_unlock;
3271
3272 err_clear:
3273 ifmgd->auth_data = NULL;
3274 err_free:
3275 kfree(auth_data);
3276 out_unlock:
3277 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3278
66e67e41 3279 return err;
af6b6374
JB		 3280}
3281
77fdaa12
JB		 3282int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3283 struct cfg80211_assoc_request *req)
f0706e82 3284{
66e67e41 3285 struct ieee80211_local *local = sdata->local;
77fdaa12 3286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3287 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3288 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3289 struct ieee80211_supported_band *sband;
66e67e41 3290 const u8 *ssidie;
2a33bee2 3291 int i, err;
f0706e82 3292
66e67e41
JB		 3293 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3294 if (!ssidie)
3295 return -EINVAL;
3296
3297 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3298 if (!assoc_data)
3299 return -ENOMEM;
3300
77fdaa12 3301 mutex_lock(&ifmgd->mtx);
9c87ba67 3302
66e67e41 3303 if (ifmgd->associated)
37ad3888 3304 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3305
3306 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3307 err = -EBUSY;
3308 goto err_free;
af6b6374 3309 }
77fdaa12 3310
66e67e41
JB		 3311 if (ifmgd->assoc_data) {
3312 err = -EBUSY;
3313 goto err_free;
3314 }
77fdaa12 3315
66e67e41
JB		 3316 if (ifmgd->auth_data) {
3317 bool match;
3318
3319 /* keep sta info, bssid if matching */
b203ca39 3320 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3321 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3322 }
3323
66e67e41
JB		 3324 /* prepare assoc data */
3325
77fdaa12 3326 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3327 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3328
d8ec4433
JO		 3329 ifmgd->beacon_crc_valid = false;
3330
de5036aa
JB		 3331 /*
3332 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3333 * We still associate in non-HT mode (11a/b/g) if any one of these
3334 * ciphers is configured as pairwise.
3335 * We can set this to true for non-11n hardware, that'll be checked
3336 * separately along with the peer capabilities.
3337 */
77fdaa12
JB		 3338 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3339 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3340 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3341 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3342 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3343
ef96a842
BG		 3344 if (req->flags & ASSOC_REQ_DISABLE_HT)
3345 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3346
4e74bfdb
JB		 3347 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3348 sband = local->hw.wiphy->bands[req->bss->channel->band];
3349 if (!sband->ht_cap.ht_supported ||
32c5057b 3350 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used)
4e74bfdb
JB		 3351 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3352
ef96a842
BG		 3353 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3354 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3355 sizeof(ifmgd->ht_capa_mask));
3356
77fdaa12 3357 if (req->ie && req->ie_len) {
66e67e41
JB		 3358 memcpy(assoc_data->ie, req->ie, req->ie_len);
3359 assoc_data->ie_len = req->ie_len;
3360 }
f679f65d 3361
66e67e41 3362 assoc_data->bss = req->bss;
f679f65d 3363
af6b6374
JB		 3364 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3365 if (ifmgd->powersave)
3366 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3367 else
3368 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3369 } else
3370 ifmgd->ap_smps = ifmgd->req_smps;
3371
66e67e41 3372 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3373 assoc_data->wmm = bss->wmm_used &&
3374 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3375 assoc_data->supp_rates = bss->supp_rates;
3376 assoc_data->supp_rates_len = bss->supp_rates_len;
074d46d1
JB		 3377 assoc_data->ht_operation_ie =
3378 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
63f170e0 3379
ab13315a
KV		 3380 if (bss->wmm_used && bss->uapsd_supported &&
3381 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3382 assoc_data->uapsd = true;
ab13315a
KV		 3383 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3384 } else {
76f0303d 3385 assoc_data->uapsd = false;
ab13315a
KV		 3386 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3387 }
3388
66e67e41
JB		 3389 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3390 assoc_data->ssid_len = ssidie[1];
63f170e0 3391
77fdaa12 3392 if (req->prev_bssid)
66e67e41 3393 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3394
3395 if (req->use_mfp) {
3396 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3397 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3398 } else {
3399 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3400 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3401 }
3402
3403 if (req->crypto.control_port)
3404 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3405 else
3406 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3407
a621fa4d
JB		 3408 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3409 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3410
66e67e41
JB		 3411 /* kick off associate process */
3412
3413 ifmgd->assoc_data = assoc_data;
3414
a1cf775d
JB		 3415 err = ieee80211_prep_connection(sdata, req->bss, true);
3416 if (err)
3417 goto err_clear;
66e67e41
JB		 3418
3419 if (!bss->dtim_period &&
3420 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3421 /*
3422 * Wait up to one beacon interval ...
3423 * should this be more if we miss one?
3424 */
3425 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3426 sdata->name, ifmgd->bssid);
3f9768a5 3427 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3428 } else {
3429 assoc_data->have_beacon = true;
3430 assoc_data->sent_assoc = false;
3431 assoc_data->timeout = jiffies;
3432 }
3433 run_again(ifmgd, assoc_data->timeout);
3434
fcff4f10
PS		 3435 if (bss->corrupt_data) {
3436 char *corrupt_type = "data";
3437 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3438 if (bss->corrupt_data &
3439 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3440 corrupt_type = "beacon and probe response";
3441 else
3442 corrupt_type = "beacon";
3443 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3444 corrupt_type = "probe response";
3445 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3446 sdata->name, corrupt_type);
3447 }
3448
66e67e41
JB		 3449 err = 0;
3450 goto out;
3451 err_clear:
3452 ifmgd->assoc_data = NULL;
3453 err_free:
3454 kfree(assoc_data);
3455 out:
3456 mutex_unlock(&ifmgd->mtx);
3457
3458 return err;
f0706e82
JB		 3459}
3460
77fdaa12 3461int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3462 struct cfg80211_deauth_request *req)
f0706e82 3463{
46900298 3464 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3465 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3466
77fdaa12
JB		 3467 mutex_lock(&ifmgd->mtx);
3468
37ad3888 3469 if (ifmgd->auth_data) {
66e67e41 3470 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3471 mutex_unlock(&ifmgd->mtx);
66e67e41 3472 return 0;
af6b6374 3473 }
77fdaa12 3474
37ad3888
JB		 3475 printk(KERN_DEBUG
3476 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3477 sdata->name, req->bssid, req->reason_code);
0ff71613 3478
37ad3888 3479 if (ifmgd->associated &&
b203ca39 3480 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
37ad3888 3481 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3482 req->reason_code, true, frame_buf);
37ad3888
JB		 3483 else
3484 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3485 IEEE80211_STYPE_DEAUTH,
3486 req->reason_code, true,
3487 frame_buf);
3488 mutex_unlock(&ifmgd->mtx);
3489
5fef7dbc 3490 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3491
7da7cc1d 3492 mutex_lock(&sdata->local->mtx);
bc83b681 3493 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3494 mutex_unlock(&sdata->local->mtx);
bc83b681 3495
f0706e82
JB		 3496 return 0;
3497}
84363e6e 3498
77fdaa12 3499int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3500 struct cfg80211_disassoc_request *req)
9c6bd790 3501{
77fdaa12 3502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3503 u8 bssid[ETH_ALEN];
5fef7dbc 3504 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3505
77fdaa12 3506 mutex_lock(&ifmgd->mtx);
10f644a4 3507
8d8b261a
JB		 3508 /*
3509 * cfg80211 should catch this ... but it's racy since
3510 * we can receive a disassoc frame, process it, hand it
3511 * to cfg80211 while that's in a locked section already
3512 * trying to tell us that the user wants to disconnect.
3513 */
0c1ad2ca 3514 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3515 mutex_unlock(&ifmgd->mtx);
3516 return -ENOLINK;
3517 }
3518
0ff71613 3519 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3520 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3521
e69e95db 3522 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3523 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3524 req->reason_code, !req->local_state_change,
3525 frame_buf);
77fdaa12 3526 mutex_unlock(&ifmgd->mtx);
10f644a4 3527
5fef7dbc 3528 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3529
7da7cc1d 3530 mutex_lock(&sdata->local->mtx);
bc83b681 3531 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3532 mutex_unlock(&sdata->local->mtx);
bc83b681 3533
10f644a4
JB		 3534 return 0;
3535}
026331c4 3536
afa762f6 3537void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3538{
3539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3540
3541 mutex_lock(&ifmgd->mtx);
3542 if (ifmgd->assoc_data)
3543 ieee80211_destroy_assoc_data(sdata, false);
3544 if (ifmgd->auth_data)
3545 ieee80211_destroy_auth_data(sdata, false);
3546 del_timer_sync(&ifmgd->timer);
3547 mutex_unlock(&ifmgd->mtx);
3548}
3549
a97c13c3
JO		 3550void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3551 enum nl80211_cqm_rssi_threshold_event rssi_event,
3552 gfp_t gfp)
3553{
3554 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3555
b5878a2d
JB		 3556 trace_api_cqm_rssi_notify(sdata, rssi_event);
3557
a97c13c3
JO		 3558 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3559}
3560EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3561
3562unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3563{
3564 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3565 return sdata->dev->operstate;
3566}
3567EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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