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mac80211: set HT channel before association
[mirror_ubuntu-bionic-kernel.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;
24398e39 183 enum nl80211_channel_type channel_type;
d5522e03
JB		 184
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
24398e39 186 channel_type = local->hw.conf.channel_type;
d5522e03 187
24398e39
JB		 188 if (WARN_ON_ONCE(channel_type == NL80211_CHAN_NO_HT))
189 return 0;
3117bbdb 190
24398e39 191 channel_type = ieee80211_get_tx_channel_type(local, channel_type);
d5522e03 192
24398e39
JB		 193 /* This can change during the lifetime of the BSS */
194 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
195 channel_type = NL80211_CHAN_HT20;
d5522e03 196
24398e39
JB		 197 if (!reconfig || (sdata->u.mgd.tx_chantype != channel_type)) {
198 if (reconfig) {
199 /*
200 * Whenever the AP announces the HT mode changed
201 * (e.g. 40 MHz intolerant) stop queues to avoid
202 * sending out frames while the rate control is
203 * reconfiguring.
204 */
205 ieee80211_stop_queues_by_reason(&sdata->local->hw,
7cc44ed4
RM		 206 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
207
24398e39
JB		 208 /* flush out all packets */
209 synchronize_net();
7cc44ed4 210
24398e39
JB		 211 drv_flush(local, false);
212 }
d5522e03
JB		 213
214 rcu_read_lock();
abe60632 215 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 216 if (sta)
217 rate_control_rate_update(local, sband, sta,
4fa00437 218 IEEE80211_RC_HT_CHANGED,
24398e39 219 channel_type);
d5522e03 220 rcu_read_unlock();
7cc44ed4 221
24398e39
JB		 222 sdata->u.mgd.tx_chantype = channel_type;
223
224 if (reconfig)
7cc44ed4
RM		 225 ieee80211_wake_queues_by_reason(&sdata->local->hw,
226 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 227 }
d5522e03 228
074d46d1 229 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 230
231 /* if bss configuration changed store the new one */
24398e39 232 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 233 changed |= BSS_CHANGED_HT;
9ed6bcce 234 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 235 }
236
237 return changed;
238}
239
9c6bd790
JB		 240/* frame sending functions */
241
66e67e41
JB		 242static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
243 struct ieee80211_supported_band *sband,
244 u32 *rates)
245{
246 int i, j, count;
247 *rates = 0;
248 count = 0;
249 for (i = 0; i < supp_rates_len; i++) {
250 int rate = (supp_rates[i] & 0x7F) * 5;
251
252 for (j = 0; j < sband->n_bitrates; j++)
253 if (sband->bitrates[j].bitrate == rate) {
254 *rates |= BIT(j);
255 count++;
256 break;
257 }
258 }
259
260 return count;
261}
262
263static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
074d46d1 264 struct sk_buff *skb, const u8 *ht_oper_ie,
66e67e41
JB		 265 struct ieee80211_supported_band *sband,
266 struct ieee80211_channel *channel,
267 enum ieee80211_smps_mode smps)
268{
074d46d1 269 struct ieee80211_ht_operation *ht_oper;
66e67e41
JB		 270 u8 *pos;
271 u32 flags = channel->flags;
272 u16 cap;
273 struct ieee80211_sta_ht_cap ht_cap;
274
275 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
276
074d46d1 277 if (!ht_oper_ie)
66e67e41
JB		 278 return;
279
074d46d1 280 if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation))
66e67e41
JB		 281 return;
282
283 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
284 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
285
074d46d1 286 ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2);
66e67e41
JB		 287
288 /* determine capability flags */
289 cap = ht_cap.cap;
290
074d46d1 291 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 292 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
293 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
294 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
295 cap &= ~IEEE80211_HT_CAP_SGI_40;
296 }
297 break;
298 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
299 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
300 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
301 cap &= ~IEEE80211_HT_CAP_SGI_40;
302 }
303 break;
304 }
305
24398e39
JB		 306 /*
307 * If 40 MHz was disabled associate as though we weren't
308 * capable of 40 MHz -- some broken APs will never fall
309 * back to trying to transmit in 20 MHz.
310 */
311 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
312 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
313 cap &= ~IEEE80211_HT_CAP_SGI_40;
314 }
315
66e67e41
JB		 316 /* set SM PS mode properly */
317 cap &= ~IEEE80211_HT_CAP_SM_PS;
318 switch (smps) {
319 case IEEE80211_SMPS_AUTOMATIC:
320 case IEEE80211_SMPS_NUM_MODES:
321 WARN_ON(1);
322 case IEEE80211_SMPS_OFF:
323 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
324 IEEE80211_HT_CAP_SM_PS_SHIFT;
325 break;
326 case IEEE80211_SMPS_STATIC:
327 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
328 IEEE80211_HT_CAP_SM_PS_SHIFT;
329 break;
330 case IEEE80211_SMPS_DYNAMIC:
331 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
332 IEEE80211_HT_CAP_SM_PS_SHIFT;
333 break;
334 }
335
336 /* reserve and fill IE */
337 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
338 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
339}
340
341static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
342{
343 struct ieee80211_local *local = sdata->local;
344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
345 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
346 struct sk_buff *skb;
347 struct ieee80211_mgmt *mgmt;
348 u8 *pos, qos_info;
349 size_t offset = 0, noffset;
350 int i, count, rates_len, supp_rates_len;
351 u16 capab;
352 struct ieee80211_supported_band *sband;
353 u32 rates = 0;
66e67e41
JB		 354
355 lockdep_assert_held(&ifmgd->mtx);
356
357 sband = local->hw.wiphy->bands[local->oper_channel->band];
358
359 if (assoc_data->supp_rates_len) {
360 /*
361 * Get all rates supported by the device and the AP as
362 * some APs don't like getting a superset of their rates
363 * in the association request (e.g. D-Link DAP 1353 in
364 * b-only mode)...
365 */
366 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
367 assoc_data->supp_rates_len,
368 sband, &rates);
369 } else {
370 /*
371 * In case AP not provide any supported rates information
372 * before association, we send information element(s) with
373 * all rates that we support.
374 */
375 rates = ~0;
376 rates_len = sband->n_bitrates;
377 }
378
379 skb = alloc_skb(local->hw.extra_tx_headroom +
380 sizeof(*mgmt) + /* bit too much but doesn't matter */
381 2 + assoc_data->ssid_len + /* SSID */
382 4 + rates_len + /* (extended) rates */
383 4 + /* power capability */
384 2 + 2 * sband->n_channels + /* supported channels */
385 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
386 assoc_data->ie_len + /* extra IEs */
387 9, /* WMM */
388 GFP_KERNEL);
389 if (!skb)
390 return;
391
392 skb_reserve(skb, local->hw.extra_tx_headroom);
393
394 capab = WLAN_CAPABILITY_ESS;
395
396 if (sband->band == IEEE80211_BAND_2GHZ) {
397 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
398 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
399 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
400 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
401 }
402
403 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
404 capab |= WLAN_CAPABILITY_PRIVACY;
405
406 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
407 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
408 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
409
410 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
411 memset(mgmt, 0, 24);
412 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
413 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
414 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
415
416 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
417 skb_put(skb, 10);
418 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
419 IEEE80211_STYPE_REASSOC_REQ);
420 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
421 mgmt->u.reassoc_req.listen_interval =
422 cpu_to_le16(local->hw.conf.listen_interval);
423 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
424 ETH_ALEN);
425 } else {
426 skb_put(skb, 4);
427 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
428 IEEE80211_STYPE_ASSOC_REQ);
429 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
430 mgmt->u.assoc_req.listen_interval =
431 cpu_to_le16(local->hw.conf.listen_interval);
432 }
433
434 /* SSID */
435 pos = skb_put(skb, 2 + assoc_data->ssid_len);
436 *pos++ = WLAN_EID_SSID;
437 *pos++ = assoc_data->ssid_len;
438 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
439
440 /* add all rates which were marked to be used above */
441 supp_rates_len = rates_len;
442 if (supp_rates_len > 8)
443 supp_rates_len = 8;
444
445 pos = skb_put(skb, supp_rates_len + 2);
446 *pos++ = WLAN_EID_SUPP_RATES;
447 *pos++ = supp_rates_len;
448
449 count = 0;
450 for (i = 0; i < sband->n_bitrates; i++) {
451 if (BIT(i) & rates) {
452 int rate = sband->bitrates[i].bitrate;
453 *pos++ = (u8) (rate / 5);
454 if (++count == 8)
455 break;
456 }
457 }
458
459 if (rates_len > count) {
460 pos = skb_put(skb, rates_len - count + 2);
461 *pos++ = WLAN_EID_EXT_SUPP_RATES;
462 *pos++ = rates_len - count;
463
464 for (i++; i < sband->n_bitrates; i++) {
465 if (BIT(i) & rates) {
466 int rate = sband->bitrates[i].bitrate;
467 *pos++ = (u8) (rate / 5);
468 }
469 }
470 }
471
472 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
473 /* 1. power capabilities */
474 pos = skb_put(skb, 4);
475 *pos++ = WLAN_EID_PWR_CAPABILITY;
476 *pos++ = 2;
477 *pos++ = 0; /* min tx power */
478 *pos++ = local->oper_channel->max_power; /* max tx power */
479
480 /* 2. supported channels */
481 /* TODO: get this in reg domain format */
482 pos = skb_put(skb, 2 * sband->n_channels + 2);
483 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
484 *pos++ = 2 * sband->n_channels;
485 for (i = 0; i < sband->n_channels; i++) {
486 *pos++ = ieee80211_frequency_to_channel(
487 sband->channels[i].center_freq);
488 *pos++ = 1; /* one channel in the subband*/
489 }
490 }
491
492 /* if present, add any custom IEs that go before HT */
493 if (assoc_data->ie_len && assoc_data->ie) {
494 static const u8 before_ht[] = {
495 WLAN_EID_SSID,
496 WLAN_EID_SUPP_RATES,
497 WLAN_EID_EXT_SUPP_RATES,
498 WLAN_EID_PWR_CAPABILITY,
499 WLAN_EID_SUPPORTED_CHANNELS,
500 WLAN_EID_RSN,
501 WLAN_EID_QOS_CAPA,
502 WLAN_EID_RRM_ENABLED_CAPABILITIES,
503 WLAN_EID_MOBILITY_DOMAIN,
504 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
505 };
506 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
507 before_ht, ARRAY_SIZE(before_ht),
508 offset);
509 pos = skb_put(skb, noffset - offset);
510 memcpy(pos, assoc_data->ie + offset, noffset - offset);
511 offset = noffset;
512 }
513
4e74bfdb 514 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
074d46d1 515 ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie,
66e67e41
JB		 516 sband, local->oper_channel, ifmgd->ap_smps);
517
518 /* if present, add any custom non-vendor IEs that go after HT */
519 if (assoc_data->ie_len && assoc_data->ie) {
520 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
521 assoc_data->ie_len,
522 offset);
523 pos = skb_put(skb, noffset - offset);
524 memcpy(pos, assoc_data->ie + offset, noffset - offset);
525 offset = noffset;
526 }
527
76f0303d
JB		 528 if (assoc_data->wmm) {
529 if (assoc_data->uapsd) {
dc41e4d4
EP		 530 qos_info = ifmgd->uapsd_queues;
531 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 532 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
533 } else {
534 qos_info = 0;
535 }
536
537 pos = skb_put(skb, 9);
538 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
539 *pos++ = 7; /* len */
540 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
541 *pos++ = 0x50;
542 *pos++ = 0xf2;
543 *pos++ = 2; /* WME */
544 *pos++ = 0; /* WME info */
545 *pos++ = 1; /* WME ver */
546 *pos++ = qos_info;
547 }
548
549 /* add any remaining custom (i.e. vendor specific here) IEs */
550 if (assoc_data->ie_len && assoc_data->ie) {
551 noffset = assoc_data->ie_len;
552 pos = skb_put(skb, noffset - offset);
553 memcpy(pos, assoc_data->ie + offset, noffset - offset);
554 }
555
556 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
557 ieee80211_tx_skb(sdata, skb);
558}
559
ef422bc0 560static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 561 const u8 *bssid, u16 stype,
5fef7dbc
JB		 562 u16 reason, bool send_frame,
563 u8 *frame_buf)
9ac19a90
JB		 564{
565 struct ieee80211_local *local = sdata->local;
46900298 566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 567 struct sk_buff *skb;
5fef7dbc 568 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 569
5fef7dbc
JB		 570 /* build frame */
571 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
572 mgmt->duration = 0; /* initialize only */
573 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 574 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 575 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 576 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 577 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 578 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
579
5fef7dbc
JB		 580 if (send_frame) {
581 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
582 DEAUTH_DISASSOC_LEN);
583 if (!skb)
584 return;
d5cdfacb 585
5fef7dbc
JB		 586 skb_reserve(skb, local->hw.extra_tx_headroom);
587
588 /* copy in frame */
589 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
590 mgmt, DEAUTH_DISASSOC_LEN);
591
592 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
593 IEEE80211_SKB_CB(skb)->flags |=
594 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 595 ieee80211_tx_skb(sdata, skb);
5fef7dbc 596 }
9ac19a90
JB		 597}
598
572e0012
KV		 599void ieee80211_send_pspoll(struct ieee80211_local *local,
600 struct ieee80211_sub_if_data *sdata)
601{
572e0012
KV		 602 struct ieee80211_pspoll *pspoll;
603 struct sk_buff *skb;
572e0012 604
d8cd189e
KV		 605 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
606 if (!skb)
572e0012 607 return;
572e0012 608
d8cd189e
KV		 609 pspoll = (struct ieee80211_pspoll *) skb->data;
610 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 611
62ae67be
JB		 612 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
613 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 614}
615
965bedad
JB		 616void ieee80211_send_nullfunc(struct ieee80211_local *local,
617 struct ieee80211_sub_if_data *sdata,
618 int powersave)
619{
620 struct sk_buff *skb;
d8cd189e 621 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 623
d8cd189e
KV		 624 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
625 if (!skb)
965bedad 626 return;
965bedad 627
d8cd189e 628 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 629 if (powersave)
d8cd189e 630 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 631
62ae67be 632 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 633 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
634 IEEE80211_STA_CONNECTION_POLL))
635 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
636
62ae67be 637 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 638}
639
d524215f
FF		 640static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
641 struct ieee80211_sub_if_data *sdata)
642{
643 struct sk_buff *skb;
644 struct ieee80211_hdr *nullfunc;
645 __le16 fc;
646
647 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
648 return;
649
650 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 651 if (!skb)
d524215f 652 return;
d15b8459 653
d524215f
FF		 654 skb_reserve(skb, local->hw.extra_tx_headroom);
655
656 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
657 memset(nullfunc, 0, 30);
658 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
659 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
660 nullfunc->frame_control = fc;
661 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
662 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
663 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
664 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
665
666 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
667 ieee80211_tx_skb(sdata, skb);
668}
669
cc32abd4
JB		 670/* spectrum management related things */
671static void ieee80211_chswitch_work(struct work_struct *work)
672{
673 struct ieee80211_sub_if_data *sdata =
674 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 675 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
676
9607e6b6 677 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 678 return;
679
77fdaa12
JB		 680 mutex_lock(&ifmgd->mtx);
681 if (!ifmgd->associated)
682 goto out;
cc32abd4
JB		 683
684 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 685 if (!sdata->local->ops->channel_switch) {
686 /* call "hw_config" only if doing sw channel switch */
687 ieee80211_hw_config(sdata->local,
688 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 689 } else {
690 /* update the device channel directly */
691 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 692 }
77fdaa12 693
cc32abd4 694 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 695 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 696
cc32abd4
JB		 697 ieee80211_wake_queues_by_reason(&sdata->local->hw,
698 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 699 out:
700 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
701 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 702}
703
5ce6e438
JB		 704void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
705{
706 struct ieee80211_sub_if_data *sdata;
707 struct ieee80211_if_managed *ifmgd;
708
709 sdata = vif_to_sdata(vif);
710 ifmgd = &sdata->u.mgd;
711
712 trace_api_chswitch_done(sdata, success);
713 if (!success) {
714 /*
715 * If the channel switch was not successful, stay
716 * around on the old channel. We currently lack
717 * good handling of this situation, possibly we
718 * should just drop the association.
719 */
720 sdata->local->csa_channel = sdata->local->oper_channel;
721 }
722
723 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
724}
725EXPORT_SYMBOL(ieee80211_chswitch_done);
726
cc32abd4
JB		 727static void ieee80211_chswitch_timer(unsigned long data)
728{
729 struct ieee80211_sub_if_data *sdata =
730 (struct ieee80211_sub_if_data *) data;
731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
732
5bb644a0
JB		 733 if (sdata->local->quiescing) {
734 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
735 return;
736 }
737
42935eca 738 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 739}
740
741void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
742 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 743 struct ieee80211_bss *bss,
744 u64 timestamp)
cc32abd4 745{
0c1ad2ca
JB		 746 struct cfg80211_bss *cbss =
747 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 748 struct ieee80211_channel *new_ch;
749 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 750 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
751 cbss->channel->band);
cc32abd4 752
77fdaa12
JB		 753 ASSERT_MGD_MTX(ifmgd);
754
755 if (!ifmgd->associated)
cc32abd4
JB		 756 return;
757
fbe9c429 758 if (sdata->local->scanning)
cc32abd4
JB		 759 return;
760
761 /* Disregard subsequent beacons if we are already running a timer
762 processing a CSA */
763
764 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
765 return;
766
767 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
768 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
769 return;
770
771 sdata->local->csa_channel = new_ch;
772
5ce6e438
JB		 773 if (sdata->local->ops->channel_switch) {
774 /* use driver's channel switch callback */
775 struct ieee80211_channel_switch ch_switch;
776 memset(&ch_switch, 0, sizeof(ch_switch));
777 ch_switch.timestamp = timestamp;
778 if (sw_elem->mode) {
779 ch_switch.block_tx = true;
780 ieee80211_stop_queues_by_reason(&sdata->local->hw,
781 IEEE80211_QUEUE_STOP_REASON_CSA);
782 }
783 ch_switch.channel = new_ch;
784 ch_switch.count = sw_elem->count;
785 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
786 drv_channel_switch(sdata->local, &ch_switch);
787 return;
788 }
789
790 /* channel switch handled in software */
cc32abd4 791 if (sw_elem->count <= 1) {
42935eca 792 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 793 } else {
9feaddc7
WYG		 794 if (sw_elem->mode)
795 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 796 IEEE80211_QUEUE_STOP_REASON_CSA);
797 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
798 mod_timer(&ifmgd->chswitch_timer,
799 jiffies +
800 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 801 cbss->beacon_interval));
cc32abd4
JB		 802 }
803}
804
805static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
806 u16 capab_info, u8 *pwr_constr_elem,
807 u8 pwr_constr_elem_len)
808{
809 struct ieee80211_conf *conf = &sdata->local->hw.conf;
810
811 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
812 return;
813
814 /* Power constraint IE length should be 1 octet */
815 if (pwr_constr_elem_len != 1)
816 return;
817
a48b13ac 818 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 819 (*pwr_constr_elem != sdata->local->power_constr_level)) {
820 sdata->local->power_constr_level = *pwr_constr_elem;
821 ieee80211_hw_config(sdata->local, 0);
822 }
823}
824
f90754c1
JO		 825void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
826{
827 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
828 struct ieee80211_local *local = sdata->local;
829 struct ieee80211_conf *conf = &local->hw.conf;
830
831 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
832 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
833 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
834
835 local->disable_dynamic_ps = false;
836 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
837}
838EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
839
840void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
841{
842 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
843 struct ieee80211_local *local = sdata->local;
844 struct ieee80211_conf *conf = &local->hw.conf;
845
846 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
847 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
848 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
849
850 local->disable_dynamic_ps = true;
851 conf->dynamic_ps_timeout = 0;
852 del_timer_sync(&local->dynamic_ps_timer);
853 ieee80211_queue_work(&local->hw,
854 &local->dynamic_ps_enable_work);
855}
856EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
857
965bedad
JB		 858/* powersave */
859static void ieee80211_enable_ps(struct ieee80211_local *local,
860 struct ieee80211_sub_if_data *sdata)
861{
862 struct ieee80211_conf *conf = &local->hw.conf;
863
d5edaedc
JB		 864 /*
865 * If we are scanning right now then the parameters will
866 * take effect when scan finishes.
867 */
fbe9c429 868 if (local->scanning)
d5edaedc
JB		 869 return;
870
965bedad
JB		 871 if (conf->dynamic_ps_timeout > 0 &&
872 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
873 mod_timer(&local->dynamic_ps_timer, jiffies +
874 msecs_to_jiffies(conf->dynamic_ps_timeout));
875 } else {
876 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
877 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 878
2a13052f
JO		 879 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
880 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
881 return;
882
883 conf->flags |= IEEE80211_CONF_PS;
884 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 885 }
886}
887
888static void ieee80211_change_ps(struct ieee80211_local *local)
889{
890 struct ieee80211_conf *conf = &local->hw.conf;
891
892 if (local->ps_sdata) {
965bedad
JB		 893 ieee80211_enable_ps(local, local->ps_sdata);
894 } else if (conf->flags & IEEE80211_CONF_PS) {
895 conf->flags &= ~IEEE80211_CONF_PS;
896 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
897 del_timer_sync(&local->dynamic_ps_timer);
898 cancel_work_sync(&local->dynamic_ps_enable_work);
899 }
900}
901
808118cb
JY		 902static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
903{
904 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
905 struct sta_info *sta = NULL;
c2c98fde 906 bool authorized = false;
808118cb
JY		 907
908 if (!mgd->powersave)
909 return false;
910
05cb9108
JB		 911 if (mgd->broken_ap)
912 return false;
913
808118cb
JY		 914 if (!mgd->associated)
915 return false;
916
917 if (!mgd->associated->beacon_ies)
918 return false;
919
920 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
921 IEEE80211_STA_CONNECTION_POLL))
922 return false;
923
924 rcu_read_lock();
925 sta = sta_info_get(sdata, mgd->bssid);
926 if (sta)
c2c98fde 927 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 928 rcu_read_unlock();
929
c2c98fde 930 return authorized;
808118cb
JY		 931}
932
965bedad 933/* need to hold RTNL or interface lock */
10f644a4 934void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 935{
936 struct ieee80211_sub_if_data *sdata, *found = NULL;
937 int count = 0;
195e294d 938 int timeout;
965bedad
JB		 939
940 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
941 local->ps_sdata = NULL;
942 return;
943 }
944
af6b6374
JB		 945 if (!list_empty(&local->work_list)) {
946 local->ps_sdata = NULL;
947 goto change;
948 }
949
965bedad 950 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 951 if (!ieee80211_sdata_running(sdata))
965bedad 952 continue;
8c7914de
RM		 953 if (sdata->vif.type == NL80211_IFTYPE_AP) {
954 /* If an AP vif is found, then disable PS
955 * by setting the count to zero thereby setting
956 * ps_sdata to NULL.
957 */
958 count = 0;
959 break;
960 }
965bedad
JB		 961 if (sdata->vif.type != NL80211_IFTYPE_STATION)
962 continue;
963 found = sdata;
964 count++;
965 }
966
808118cb 967 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 968 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 969 s32 beaconint_us;
970
971 if (latency < 0)
ed77134b 972 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 973
974 beaconint_us = ieee80211_tu_to_usec(
975 found->vif.bss_conf.beacon_int);
976
ff616381 977 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 978 if (timeout < 0) {
979 /*
ff616381
JO		 980 * Go to full PSM if the user configures a very low
981 * latency requirement.
0ab82b04
EP		 982 * The 2000 second value is there for compatibility
983 * until the PM_QOS_NETWORK_LATENCY is configured
984 * with real values.
195e294d 985 */
0ab82b04
EP		 986 if (latency > (1900 * USEC_PER_MSEC) &&
987 latency != (2000 * USEC_PER_SEC))
195e294d 988 timeout = 0;
ff616381
JO		 989 else
990 timeout = 100;
195e294d 991 }
f90754c1
JO		 992 local->dynamic_ps_user_timeout = timeout;
993 if (!local->disable_dynamic_ps)
994 conf->dynamic_ps_timeout =
995 local->dynamic_ps_user_timeout;
195e294d 996
04fe2037 997 if (beaconint_us > latency) {
10f644a4 998 local->ps_sdata = NULL;
04fe2037 999 } else {
56007a02 1000 struct ieee80211_bss *bss;
04fe2037 1001 int maxslp = 1;
56007a02 1002 u8 dtimper;
04fe2037 1003
56007a02
JB		 1004 bss = (void *)found->u.mgd.associated->priv;
1005 dtimper = bss->dtim_period;
1006
1007 /* If the TIM IE is invalid, pretend the value is 1 */
1008 if (!dtimper)
1009 dtimper = 1;
1010 else if (dtimper > 1)
04fe2037
JB		 1011 maxslp = min_t(int, dtimper,
1012 latency / beaconint_us);
1013
9ccebe61 1014 local->hw.conf.max_sleep_period = maxslp;
56007a02 1015 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1016 local->ps_sdata = found;
04fe2037 1017 }
10f644a4 1018 } else {
965bedad 1019 local->ps_sdata = NULL;
10f644a4 1020 }
965bedad 1021
af6b6374 1022 change:
965bedad
JB		 1023 ieee80211_change_ps(local);
1024}
1025
1026void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1027{
1028 struct ieee80211_local *local =
1029 container_of(work, struct ieee80211_local,
1030 dynamic_ps_disable_work);
1031
1032 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1033 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1034 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1035 }
1036
1037 ieee80211_wake_queues_by_reason(&local->hw,
1038 IEEE80211_QUEUE_STOP_REASON_PS);
1039}
1040
1041void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1042{
1043 struct ieee80211_local *local =
1044 container_of(work, struct ieee80211_local,
1045 dynamic_ps_enable_work);
1046 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1047 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1048 unsigned long flags;
1049 int q;
965bedad
JB		 1050
1051 /* can only happen when PS was just disabled anyway */
1052 if (!sdata)
1053 return;
1054
5e34069c
CL		 1055 ifmgd = &sdata->u.mgd;
1056
965bedad
JB		 1057 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1058 return;
1059
77b7023a
AN		 1060 if (!local->disable_dynamic_ps &&
1061 local->hw.conf.dynamic_ps_timeout > 0) {
1062 /* don't enter PS if TX frames are pending */
1063 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1064 mod_timer(&local->dynamic_ps_timer, jiffies +
1065 msecs_to_jiffies(
1066 local->hw.conf.dynamic_ps_timeout));
1067 return;
1068 }
77b7023a
AN		 1069
1070 /*
1071 * transmission can be stopped by others which leads to
1072 * dynamic_ps_timer expiry. Postpone the ps timer if it
1073 * is not the actual idle state.
1074 */
1075 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1076 for (q = 0; q < local->hw.queues; q++) {
1077 if (local->queue_stop_reasons[q]) {
1078 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1079 flags);
1080 mod_timer(&local->dynamic_ps_timer, jiffies +
1081 msecs_to_jiffies(
1082 local->hw.conf.dynamic_ps_timeout));
1083 return;
1084 }
1085 }
1086 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1087 }
1ddc2867 1088
375177bf 1089 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1090 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1091 netif_tx_stop_all_queues(sdata->dev);
965bedad 1092
e8306f98
VN		 1093 if (drv_tx_frames_pending(local))
1094 mod_timer(&local->dynamic_ps_timer, jiffies +
1095 msecs_to_jiffies(
1096 local->hw.conf.dynamic_ps_timeout));
1097 else {
1098 ieee80211_send_nullfunc(local, sdata, 1);
1099 /* Flush to get the tx status of nullfunc frame */
1100 drv_flush(local, false);
1101 }
f3e85b9e
VN		 1102 }
1103
2a13052f
JO		 1104 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1105 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1106 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1107 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1108 local->hw.conf.flags |= IEEE80211_CONF_PS;
1109 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1110 }
f3e85b9e 1111
77b7023a
AN		 1112 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1113 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1114}
1115
1116void ieee80211_dynamic_ps_timer(unsigned long data)
1117{
1118 struct ieee80211_local *local = (void *) data;
1119
78f1a8b7 1120 if (local->quiescing || local->suspended)
5bb644a0
JB		 1121 return;
1122
42935eca 1123 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1124}
1125
60f8b39c 1126/* MLME */
f698d856 1127static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1128 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1129 u8 *wmm_param, size_t wmm_param_len)
1130{
f0706e82 1131 struct ieee80211_tx_queue_params params;
4ced3f74 1132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1133 size_t left;
1134 int count;
ab13315a 1135 u8 *pos, uapsd_queues = 0;
f0706e82 1136
e1b3ec1a
SG		 1137 if (!local->ops->conf_tx)
1138 return;
1139
af6b6374 1140 if (local->hw.queues < 4)
3434fbd3
JB		 1141 return;
1142
1143 if (!wmm_param)
1144 return;
1145
f0706e82
JB		 1146 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1147 return;
ab13315a
KV		 1148
1149 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1150 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1151
f0706e82 1152 count = wmm_param[6] & 0x0f;
46900298 1153 if (count == ifmgd->wmm_last_param_set)
f0706e82 1154 return;
46900298 1155 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1156
1157 pos = wmm_param + 8;
1158 left = wmm_param_len - 8;
1159
1160 memset(&params, 0, sizeof(params));
1161
f0706e82
JB		 1162 local->wmm_acm = 0;
1163 for (; left >= 4; left -= 4, pos += 4) {
1164 int aci = (pos[0] >> 5) & 0x03;
1165 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1166 bool uapsd = false;
f0706e82
JB		 1167 int queue;
1168
1169 switch (aci) {
0eeb59fe 1170 case 1: /* AC_BK */
e100bb64 1171 queue = 3;
988c0f72 1172 if (acm)
0eeb59fe 1173 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1174 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1175 uapsd = true;
f0706e82 1176 break;
0eeb59fe 1177 case 2: /* AC_VI */
e100bb64 1178 queue = 1;
988c0f72 1179 if (acm)
0eeb59fe 1180 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1181 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1182 uapsd = true;
f0706e82 1183 break;
0eeb59fe 1184 case 3: /* AC_VO */
e100bb64 1185 queue = 0;
988c0f72 1186 if (acm)
0eeb59fe 1187 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1188 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1189 uapsd = true;
f0706e82 1190 break;
0eeb59fe 1191 case 0: /* AC_BE */
f0706e82 1192 default:
e100bb64 1193 queue = 2;
988c0f72 1194 if (acm)
0eeb59fe 1195 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1196 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1197 uapsd = true;
f0706e82
JB		 1198 break;
1199 }
1200
1201 params.aifs = pos[0] & 0x0f;
1202 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1203 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1204 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1205 params.uapsd = uapsd;
1206
f4ea83dd 1207#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1208 wiphy_debug(local->hw.wiphy,
1209 "WMM queue=%d aci=%d acm=%d aifs=%d "
1210 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1211 queue, aci, acm,
1212 params.aifs, params.cw_min, params.cw_max,
1213 params.txop, params.uapsd);
3330d7be 1214#endif
f6f3def3
EP		 1215 sdata->tx_conf[queue] = params;
1216 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1217 wiphy_debug(local->hw.wiphy,
1218 "failed to set TX queue parameters for queue %d\n",
1219 queue);
f0706e82 1220 }
e1b3ec1a
SG		 1221
1222 /* enable WMM or activate new settings */
4ced3f74 1223 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1224}
1225
7a5158ef
JB		 1226static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1227 u16 capab, bool erp_valid, u8 erp)
5628221c 1228{
bda3933a 1229 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1230 u32 changed = 0;
7a5158ef
JB		 1231 bool use_protection;
1232 bool use_short_preamble;
1233 bool use_short_slot;
1234
1235 if (erp_valid) {
1236 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1237 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1238 } else {
1239 use_protection = false;
1240 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1241 }
1242
1243 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1244 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1245 use_short_slot = true;
5628221c 1246
471b3efd 1247 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1248 bss_conf->use_cts_prot = use_protection;
1249 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1250 }
7e9ed188 1251
d43c7b37 1252 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1253 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1254 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1255 }
d9430a32 1256
7a5158ef 1257 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1258 bss_conf->use_short_slot = use_short_slot;
1259 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1260 }
1261
1262 return changed;
1263}
1264
f698d856 1265static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1266 struct cfg80211_bss *cbss,
ae5eb026 1267 u32 bss_info_changed)
f0706e82 1268{
0c1ad2ca 1269 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1270 struct ieee80211_local *local = sdata->local;
68542962 1271 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1272
ae5eb026 1273 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1274 /* set timing information */
68542962 1275 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1276 bss_conf->last_tsf = cbss->tsf;
5628221c 1277
77fdaa12
JB		 1278 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1279 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1280 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1281
7ccc8bd7
FF		 1282 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1283 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1284
0c1ad2ca
JB		 1285 sdata->u.mgd.associated = cbss;
1286 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1287
17e4ec14
JM		 1288 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1289
b291ba11
JB		 1290 /* just to be sure */
1291 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1292 IEEE80211_STA_BEACON_POLL);
1293
9ac19a90 1294 ieee80211_led_assoc(local, 1);
9306102e 1295
e5b900d2
JB		 1296 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1297 bss_conf->dtim_period = bss->dtim_period;
1298 else
1299 bss_conf->dtim_period = 0;
1300
68542962 1301 bss_conf->assoc = 1;
9cef8737 1302
a97c13c3 1303 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1304 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1305 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1306 bss_info_changed |= BSS_CHANGED_CQM;
1307
68542962
JO		 1308 /* Enable ARP filtering */
1309 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1310 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1311 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1312 }
1313
ae5eb026 1314 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1315
056508dc
JB		 1316 mutex_lock(&local->iflist_mtx);
1317 ieee80211_recalc_ps(local, -1);
025e6be2 1318 ieee80211_recalc_smps(local);
056508dc 1319 mutex_unlock(&local->iflist_mtx);
e0cb686f 1320
8a5b33f5 1321 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1322 netif_carrier_on(sdata->dev);
f0706e82
JB		 1323}
1324
e69e95db 1325static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1326 u16 stype, u16 reason, bool tx,
1327 u8 *frame_buf)
aa458d17 1328{
46900298 1329 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1330 struct ieee80211_local *local = sdata->local;
1331 struct sta_info *sta;
3cc5240b 1332 u32 changed = 0;
b291ba11 1333 u8 bssid[ETH_ALEN];
aa458d17 1334
77fdaa12
JB		 1335 ASSERT_MGD_MTX(ifmgd);
1336
37ad3888
JB		 1337 if (WARN_ON_ONCE(tx && !frame_buf))
1338 return;
1339
b291ba11
JB		 1340 if (WARN_ON(!ifmgd->associated))
1341 return;
1342
0c1ad2ca 1343 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1344
77fdaa12
JB		 1345 ifmgd->associated = NULL;
1346 memset(ifmgd->bssid, 0, ETH_ALEN);
1347
1348 /*
1349 * we need to commit the associated = NULL change because the
1350 * scan code uses that to determine whether this iface should
1351 * go to/wake up from powersave or not -- and could otherwise
1352 * wake the queues erroneously.
1353 */
1354 smp_mb();
1355
1356 /*
1357 * Thus, we can only afterwards stop the queues -- to account
1358 * for the case where another CPU is finishing a scan at this
1359 * time -- we don't want the scan code to enable queues.
1360 */
aa458d17 1361
8a5b33f5 1362 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1363 netif_carrier_off(sdata->dev);
1364
2a419056 1365 mutex_lock(&local->sta_mtx);
abe60632 1366 sta = sta_info_get(sdata, bssid);
4cad6c7c 1367 if (sta) {
c2c98fde 1368 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1369 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1370 }
2a419056 1371 mutex_unlock(&local->sta_mtx);
aa458d17 1372
37ad3888
JB		 1373 /* deauthenticate/disassociate now */
1374 if (tx || frame_buf)
1375 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1376 tx, frame_buf);
1377
1378 /* flush out frame */
1379 if (tx)
1380 drv_flush(local, false);
1381
1382 /* remove AP and TDLS peers */
1383 sta_info_flush(local, sdata);
1384
1385 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1386 changed |= ieee80211_reset_erp_info(sdata);
1387
f5e5bf25 1388 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1389 changed |= BSS_CHANGED_ASSOC;
1390 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1391
413ad50a 1392 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1393 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1394 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1395
a8302de9
VT		 1396 local->power_constr_level = 0;
1397
520eb820
KV		 1398 del_timer_sync(&local->dynamic_ps_timer);
1399 cancel_work_sync(&local->dynamic_ps_enable_work);
1400
e0cb686f
KV		 1401 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1402 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1403 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1404 }
a331400b 1405 local->ps_sdata = NULL;
ae5eb026 1406
68542962
JO		 1407 /* Disable ARP filtering */
1408 if (sdata->vif.bss_conf.arp_filter_enabled) {
1409 sdata->vif.bss_conf.arp_filter_enabled = false;
1410 changed |= BSS_CHANGED_ARP_FILTER;
1411 }
1412
3abead59
JB		 1413 sdata->vif.bss_conf.qos = false;
1414 changed |= BSS_CHANGED_QOS;
1415
0aaffa9b
JB		 1416 /* The BSSID (not really interesting) and HT changed */
1417 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1418 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1419
3cc5240b
JB		 1420 /* channel(_type) changes are handled by ieee80211_hw_config */
1421 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1422 ieee80211_hw_config(local, 0);
1423
3abead59
JB		 1424 /* disassociated - set to defaults now */
1425 ieee80211_set_wmm_default(sdata, false);
1426
b9dcf712
JB		 1427 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1428 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1429 del_timer_sync(&sdata->u.mgd.timer);
1430 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1431}
f0706e82 1432
3cf335d5
KV		 1433void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1434 struct ieee80211_hdr *hdr)
1435{
1436 /*
1437 * We can postpone the mgd.timer whenever receiving unicast frames
1438 * from AP because we know that the connection is working both ways
1439 * at that time. But multicast frames (and hence also beacons) must
1440 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1441 * data idle periods for sending the periodic probe request to the
1442 * AP we're connected to.
3cf335d5 1443 */
b291ba11
JB		 1444 if (is_multicast_ether_addr(hdr->addr1))
1445 return;
1446
be099e82 1447 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1448}
f0706e82 1449
4e5ff376
FF		 1450static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1451{
1452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1453
1454 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1455 IEEE80211_STA_CONNECTION_POLL)))
1456 return;
1457
1458 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1459 IEEE80211_STA_BEACON_POLL);
1460 mutex_lock(&sdata->local->iflist_mtx);
1461 ieee80211_recalc_ps(sdata->local, -1);
1462 mutex_unlock(&sdata->local->iflist_mtx);
1463
1464 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1465 return;
1466
1467 /*
1468 * We've received a probe response, but are not sure whether
1469 * we have or will be receiving any beacons or data, so let's
1470 * schedule the timers again, just in case.
1471 */
1472 ieee80211_sta_reset_beacon_monitor(sdata);
1473
1474 mod_timer(&ifmgd->conn_mon_timer,
1475 round_jiffies_up(jiffies +
1476 IEEE80211_CONNECTION_IDLE_TIME));
1477}
1478
1479void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1480 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1481{
75706d0e 1482 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1483 return;
1484
04ac3c0e
FF		 1485 if (ack)
1486 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1487
1488 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1489 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1490 if (ack)
1491 sdata->u.mgd.probe_send_count = 0;
1492 else
1493 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1494 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1495 }
1496}
1497
a43abf29
ML		 1498static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1499{
1500 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1501 const u8 *ssid;
f01a067d 1502 u8 *dst = ifmgd->associated->bssid;
180205bd 1503 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1504
1505 /*
1506 * Try sending broadcast probe requests for the last three
1507 * probe requests after the first ones failed since some
1508 * buggy APs only support broadcast probe requests.
1509 */
1510 if (ifmgd->probe_send_count >= unicast_limit)
1511 dst = NULL;
a43abf29 1512
4e5ff376
FF		 1513 /*
1514 * When the hardware reports an accurate Tx ACK status, it's
1515 * better to send a nullfunc frame instead of a probe request,
1516 * as it will kick us off the AP quickly if we aren't associated
1517 * anymore. The timeout will be reset if the frame is ACKed by
1518 * the AP.
1519 */
04ac3c0e
FF		 1520 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1521 ifmgd->nullfunc_failed = false;
4e5ff376 1522 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1523 } else {
4e5ff376 1524 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1525 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1526 (u32) -1, true, false);
4e5ff376 1527 }
a43abf29
ML		 1528
1529 ifmgd->probe_send_count++;
180205bd 1530 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1531 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1532 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1533 drv_flush(sdata->local, false);
a43abf29
ML		 1534}
1535
b291ba11
JB		 1536static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1537 bool beacon)
04de8381 1538{
04de8381 1539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1540 bool already = false;
34bfc411 1541
9607e6b6 1542 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1543 return;
1544
91a3bd76
LR		 1545 if (sdata->local->scanning)
1546 return;
1547
b8bc4b0a
JB		 1548 if (sdata->local->tmp_channel)
1549 return;
1550
77fdaa12
JB		 1551 mutex_lock(&ifmgd->mtx);
1552
1553 if (!ifmgd->associated)
1554 goto out;
1555
a860402d 1556#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1557 if (beacon && net_ratelimit())
1558 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1559 "- sending probe request\n", sdata->name);
a860402d 1560#endif
04de8381 1561
b291ba11
JB		 1562 /*
1563 * The driver/our work has already reported this event or the
1564 * connection monitoring has kicked in and we have already sent
1565 * a probe request. Or maybe the AP died and the driver keeps
1566 * reporting until we disassociate...
1567 *
1568 * In either case we have to ignore the current call to this
1569 * function (except for setting the correct probe reason bit)
1570 * because otherwise we would reset the timer every time and
1571 * never check whether we received a probe response!
1572 */
1573 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1574 IEEE80211_STA_CONNECTION_POLL))
1575 already = true;
1576
1577 if (beacon)
1578 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1579 else
1580 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1581
1582 if (already)
1583 goto out;
1584
4e751843
JB		 1585 mutex_lock(&sdata->local->iflist_mtx);
1586 ieee80211_recalc_ps(sdata->local, -1);
1587 mutex_unlock(&sdata->local->iflist_mtx);
1588
a43abf29
ML		 1589 ifmgd->probe_send_count = 0;
1590 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1591 out:
1592 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1593}
1594
a619a4c0
JO		 1595struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1596 struct ieee80211_vif *vif)
1597{
1598 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1600 struct sk_buff *skb;
1601 const u8 *ssid;
1602
1603 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1604 return NULL;
1605
1606 ASSERT_MGD_MTX(ifmgd);
1607
1608 if (!ifmgd->associated)
1609 return NULL;
1610
1611 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1612 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1613 (u32) -1, ssid + 2, ssid[1],
1614 NULL, 0, true);
a619a4c0
JO		 1615
1616 return skb;
1617}
1618EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1619
1e4dcd01
JO		 1620static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1621{
1622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1623 struct ieee80211_local *local = sdata->local;
1624 u8 bssid[ETH_ALEN];
5fef7dbc 1625 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1626
1627 mutex_lock(&ifmgd->mtx);
1628 if (!ifmgd->associated) {
1629 mutex_unlock(&ifmgd->mtx);
1630 return;
1631 }
1632
1633 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1634
180205bd
BG		 1635 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1636 sdata->name, bssid);
1e4dcd01 1637
37ad3888
JB		 1638 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1639 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1640 false, frame_buf);
1e4dcd01 1641 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1642
1e4dcd01
JO		 1643 /*
1644 * must be outside lock due to cfg80211,
1645 * but that's not a problem.
1646 */
5fef7dbc 1647 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1648
1649 mutex_lock(&local->mtx);
1650 ieee80211_recalc_idle(local);
1651 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1652}
1653
1654void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1655{
1656 struct ieee80211_sub_if_data *sdata =
1657 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1658 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1659 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1660 struct sta_info *sta;
1661
1662 if (ifmgd->associated) {
30fa9047 1663 rcu_read_lock();
a85e1d55
PS		 1664 sta = sta_info_get(sdata, ifmgd->bssid);
1665 if (sta)
1666 sta->beacon_loss_count++;
30fa9047 1667 rcu_read_unlock();
a85e1d55 1668 }
b291ba11 1669
1e4dcd01
JO		 1670 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1671 __ieee80211_connection_loss(sdata);
1672 else
1673 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1674}
1675
04de8381
KV		 1676void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1677{
1678 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1679 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1680
b5878a2d
JB		 1681 trace_api_beacon_loss(sdata);
1682
1e4dcd01
JO		 1683 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1684 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1685}
1686EXPORT_SYMBOL(ieee80211_beacon_loss);
1687
1e4dcd01
JO		 1688void ieee80211_connection_loss(struct ieee80211_vif *vif)
1689{
1690 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1691 struct ieee80211_hw *hw = &sdata->local->hw;
1692
b5878a2d
JB		 1693 trace_api_connection_loss(sdata);
1694
1e4dcd01
JO		 1695 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1696 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1697}
1698EXPORT_SYMBOL(ieee80211_connection_loss);
1699
1700
66e67e41
JB		 1701static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1702 bool assoc)
1703{
1704 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1705
1706 lockdep_assert_held(&sdata->u.mgd.mtx);
1707
66e67e41
JB		 1708 if (!assoc) {
1709 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1710
1711 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1712 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1713 }
1714
1715 cfg80211_put_bss(auth_data->bss);
1716 kfree(auth_data);
1717 sdata->u.mgd.auth_data = NULL;
1718}
1719
1720static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1721 struct ieee80211_mgmt *mgmt, size_t len)
1722{
1723 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1724 u8 *pos;
1725 struct ieee802_11_elems elems;
1726
1727 pos = mgmt->u.auth.variable;
1728 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1729 if (!elems.challenge)
1730 return;
1731 auth_data->expected_transaction = 4;
1732 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1733 elems.challenge - 2, elems.challenge_len + 2,
1734 auth_data->bss->bssid, auth_data->bss->bssid,
1735 auth_data->key, auth_data->key_len,
1736 auth_data->key_idx);
1737}
1738
1739static enum rx_mgmt_action __must_check
1740ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1741 struct ieee80211_mgmt *mgmt, size_t len)
1742{
1743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1744 u8 bssid[ETH_ALEN];
1745 u16 auth_alg, auth_transaction, status_code;
1746 struct sta_info *sta;
1747
1748 lockdep_assert_held(&ifmgd->mtx);
1749
1750 if (len < 24 + 6)
1751 return RX_MGMT_NONE;
1752
1753 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1754 return RX_MGMT_NONE;
1755
1756 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1757
888d04df 1758 if (compare_ether_addr(bssid, mgmt->bssid))
66e67e41
JB		 1759 return RX_MGMT_NONE;
1760
1761 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1762 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1763 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1764
1765 if (auth_alg != ifmgd->auth_data->algorithm ||
1766 auth_transaction != ifmgd->auth_data->expected_transaction)
1767 return RX_MGMT_NONE;
1768
1769 if (status_code != WLAN_STATUS_SUCCESS) {
1770 printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n",
1771 sdata->name, mgmt->sa, status_code);
1772 goto out;
1773 }
1774
1775 switch (ifmgd->auth_data->algorithm) {
1776 case WLAN_AUTH_OPEN:
1777 case WLAN_AUTH_LEAP:
1778 case WLAN_AUTH_FT:
1779 break;
1780 case WLAN_AUTH_SHARED_KEY:
1781 if (ifmgd->auth_data->expected_transaction != 4) {
1782 ieee80211_auth_challenge(sdata, mgmt, len);
1783 /* need another frame */
1784 return RX_MGMT_NONE;
1785 }
1786 break;
1787 default:
1788 WARN_ONCE(1, "invalid auth alg %d",
1789 ifmgd->auth_data->algorithm);
1790 return RX_MGMT_NONE;
1791 }
1792
1793 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
1794 out:
66e67e41
JB		 1795 ifmgd->auth_data->done = true;
1796 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1797 run_again(ifmgd, ifmgd->auth_data->timeout);
1798
1799 /* move station state to auth */
1800 mutex_lock(&sdata->local->sta_mtx);
1801 sta = sta_info_get(sdata, bssid);
1802 if (!sta) {
1803 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1804 goto out_err;
1805 }
1806 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
1807 printk(KERN_DEBUG "%s: failed moving %pM to auth\n",
1808 sdata->name, bssid);
1809 goto out_err;
1810 }
1811 mutex_unlock(&sdata->local->sta_mtx);
1812
1813 return RX_MGMT_CFG80211_RX_AUTH;
1814 out_err:
1815 mutex_unlock(&sdata->local->sta_mtx);
1816 /* ignore frame -- wait for timeout */
1817 return RX_MGMT_NONE;
1818}
1819
1820
77fdaa12
JB		 1821static enum rx_mgmt_action __must_check
1822ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1823 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1824{
46900298 1825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1826 const u8 *bssid = NULL;
f0706e82
JB		 1827 u16 reason_code;
1828
66e67e41
JB		 1829 lockdep_assert_held(&ifmgd->mtx);
1830
f4ea83dd 1831 if (len < 24 + 2)
77fdaa12 1832 return RX_MGMT_NONE;
f0706e82 1833
66e67e41 1834 if (!ifmgd->associated ||
888d04df 1835 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1836 return RX_MGMT_NONE;
77fdaa12 1837
0c1ad2ca 1838 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1839
1840 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1841
77fdaa12 1842 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1843 sdata->name, bssid, reason_code);
77fdaa12 1844
37ad3888
JB		 1845 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1846
7da7cc1d 1847 mutex_lock(&sdata->local->mtx);
63f170e0 1848 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1849 mutex_unlock(&sdata->local->mtx);
f0706e82 1850
77fdaa12 1851 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1852}
1853
1854
77fdaa12
JB		 1855static enum rx_mgmt_action __must_check
1856ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1857 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1858{
46900298 1859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1860 u16 reason_code;
1861
66e67e41 1862 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1863
66e67e41 1864 if (len < 24 + 2)
77fdaa12
JB		 1865 return RX_MGMT_NONE;
1866
66e67e41 1867 if (!ifmgd->associated ||
888d04df 1868 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1869 return RX_MGMT_NONE;
f0706e82
JB		 1870
1871 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1872
0ff71613 1873 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1874 sdata->name, mgmt->sa, reason_code);
f0706e82 1875
37ad3888
JB		 1876 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1877
7da7cc1d 1878 mutex_lock(&sdata->local->mtx);
bc83b681 1879 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1880 mutex_unlock(&sdata->local->mtx);
37ad3888 1881
77fdaa12 1882 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1883}
1884
c74d084f
CL		 1885static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1886 u8 *supp_rates, unsigned int supp_rates_len,
1887 u32 *rates, u32 *basic_rates,
1888 bool *have_higher_than_11mbit,
1889 int *min_rate, int *min_rate_index)
1890{
1891 int i, j;
1892
1893 for (i = 0; i < supp_rates_len; i++) {
1894 int rate = (supp_rates[i] & 0x7f) * 5;
1895 bool is_basic = !!(supp_rates[i] & 0x80);
1896
1897 if (rate > 110)
1898 *have_higher_than_11mbit = true;
1899
1900 /*
1901 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1902 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1903 *
1904 * Note: Even through the membership selector and the basic
1905 * rate flag share the same bit, they are not exactly
1906 * the same.
1907 */
1908 if (!!(supp_rates[i] & 0x80) &&
1909 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1910 continue;
1911
1912 for (j = 0; j < sband->n_bitrates; j++) {
1913 if (sband->bitrates[j].bitrate == rate) {
1914 *rates |= BIT(j);
1915 if (is_basic)
1916 *basic_rates |= BIT(j);
1917 if (rate < *min_rate) {
1918 *min_rate = rate;
1919 *min_rate_index = j;
1920 }
1921 break;
1922 }
1923 }
1924 }
1925}
f0706e82 1926
66e67e41
JB		 1927static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1928 bool assoc)
1929{
1930 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1931
1932 lockdep_assert_held(&sdata->u.mgd.mtx);
1933
66e67e41
JB		 1934 if (!assoc) {
1935 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1936
1937 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1938 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1939 }
1940
1941 kfree(assoc_data);
1942 sdata->u.mgd.assoc_data = NULL;
1943}
1944
1945static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1946 struct cfg80211_bss *cbss,
af6b6374 1947 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1948{
46900298 1949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1950 struct ieee80211_local *local = sdata->local;
8318d78a 1951 struct ieee80211_supported_band *sband;
f0706e82 1952 struct sta_info *sta;
af6b6374 1953 u8 *pos;
af6b6374 1954 u16 capab_info, aid;
f0706e82 1955 struct ieee802_11_elems elems;
bda3933a 1956 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1957 u32 changed = 0;
c74d084f 1958 int err;
f0706e82 1959
af6b6374 1960 /* AssocResp and ReassocResp have identical structure */
f0706e82 1961
f0706e82 1962 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1963 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1964
1dd84aa2 1965 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 1966 printk(KERN_DEBUG
1967 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1968 sdata->name, aid);
1dd84aa2
JB		 1969 aid &= ~(BIT(15) | BIT(14));
1970
05cb9108
JB		 1971 ifmgd->broken_ap = false;
1972
1973 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1974 printk(KERN_DEBUG
1975 "%s: invalid AID value %d (out of range), turn off PS\n",
1976 sdata->name, aid);
1977 aid = 0;
1978 ifmgd->broken_ap = true;
1979 }
1980
af6b6374
JB		 1981 pos = mgmt->u.assoc_resp.variable;
1982 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1983
f0706e82
JB		 1984 if (!elems.supp_rates) {
1985 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1986 sdata->name);
af6b6374 1987 return false;
f0706e82
JB		 1988 }
1989
46900298 1990 ifmgd->aid = aid;
f0706e82 1991
2a33bee2
GE		 1992 mutex_lock(&sdata->local->sta_mtx);
1993 /*
1994 * station info was already allocated and inserted before
1995 * the association and should be available to us
1996 */
7852e361 1997 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 1998 if (WARN_ON(!sta)) {
1999 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2000 return false;
77fdaa12 2001 }
05e5e883 2002
66e67e41 2003 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2004
ab1faead 2005 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2006 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2007 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2008
4b7679a5 2009 rate_control_rate_init(sta);
f0706e82 2010
46900298 2011 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2012 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2013
ddf4ac53 2014 if (elems.wmm_param)
c2c98fde 2015 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2016
c8987876
JB		 2017 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2018 if (!err)
2019 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2020 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2021 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2022 if (err) {
2023 printk(KERN_DEBUG
2024 "%s: failed to move station %pM to desired state\n",
2025 sdata->name, sta->sta.addr);
2026 WARN_ON(__sta_info_destroy(sta));
2027 mutex_unlock(&sdata->local->sta_mtx);
2028 return false;
2029 }
2030
7852e361 2031 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2032
f2176d72
JO		 2033 /*
2034 * Always handle WMM once after association regardless
2035 * of the first value the AP uses. Setting -1 here has
2036 * that effect because the AP values is an unsigned
2037 * 4-bit value.
2038 */
2039 ifmgd->wmm_last_param_set = -1;
2040
ddf4ac53 2041 if (elems.wmm_param)
4ced3f74 2042 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2043 elems.wmm_param_len);
aa837e1d 2044 else
3abead59
JB		 2045 ieee80211_set_wmm_default(sdata, false);
2046 changed |= BSS_CHANGED_QOS;
f0706e82 2047
074d46d1 2048 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2049 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2050 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2051 cbss->bssid, false);
ae5eb026 2052
60f8b39c
JB		 2053 /* set AID and assoc capability,
2054 * ieee80211_set_associated() will tell the driver */
2055 bss_conf->aid = aid;
2056 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2057 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2058
d524215f
FF		 2059 /*
2060 * If we're using 4-addr mode, let the AP know that we're
2061 * doing so, so that it can create the STA VLAN on its side
2062 */
2063 if (ifmgd->use_4addr)
2064 ieee80211_send_4addr_nullfunc(local, sdata);
2065
15b7b062 2066 /*
b291ba11
JB		 2067 * Start timer to probe the connection to the AP now.
2068 * Also start the timer that will detect beacon loss.
15b7b062 2069 */
b291ba11 2070 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2071 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2072
af6b6374 2073 return true;
f0706e82
JB		 2074}
2075
66e67e41
JB		 2076static enum rx_mgmt_action __must_check
2077ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2078 struct ieee80211_mgmt *mgmt, size_t len,
2079 struct cfg80211_bss **bss)
2080{
2081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2082 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2083 u16 capab_info, status_code, aid;
2084 struct ieee802_11_elems elems;
2085 u8 *pos;
2086 bool reassoc;
2087
2088 lockdep_assert_held(&ifmgd->mtx);
2089
2090 if (!assoc_data)
2091 return RX_MGMT_NONE;
888d04df 2092 if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2093 return RX_MGMT_NONE;
2094
2095 /*
2096 * AssocResp and ReassocResp have identical structure, so process both
2097 * of them in this function.
2098 */
2099
2100 if (len < 24 + 6)
2101 return RX_MGMT_NONE;
2102
2103 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2104 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2105 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2106 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2107
2108 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
2109 "status=%d aid=%d)\n",
2110 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2111 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2112
2113 pos = mgmt->u.assoc_resp.variable;
2114 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2115
2116 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2117 elems.timeout_int && elems.timeout_int_len == 5 &&
2118 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2119 u32 tu, ms;
2120 tu = get_unaligned_le32(elems.timeout_int + 1);
2121 ms = tu * 1024 / 1000;
2122 printk(KERN_DEBUG "%s: %pM rejected association temporarily; "
2123 "comeback duration %u TU (%u ms)\n",
2124 sdata->name, mgmt->sa, tu, ms);
2125 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2126 if (ms > IEEE80211_ASSOC_TIMEOUT)
2127 run_again(ifmgd, assoc_data->timeout);
2128 return RX_MGMT_NONE;
2129 }
2130
2131 *bss = assoc_data->bss;
2132
2133 if (status_code != WLAN_STATUS_SUCCESS) {
2134 printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n",
2135 sdata->name, mgmt->sa, status_code);
2136 ieee80211_destroy_assoc_data(sdata, false);
2137 } else {
2138 printk(KERN_DEBUG "%s: associated\n", sdata->name);
2139
66e67e41
JB		 2140 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2141 /* oops -- internal error -- send timeout for now */
79ebfb85 2142 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2143 sta_info_destroy_addr(sdata, mgmt->bssid);
2144 cfg80211_put_bss(*bss);
2145 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2146 }
79ebfb85
JB		 2147
2148 /*
2149 * destroy assoc_data afterwards, as otherwise an idle
2150 * recalc after assoc_data is NULL but before associated
2151 * is set can cause the interface to go idle
2152 */
2153 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2154 }
2155
2156 return RX_MGMT_CFG80211_RX_ASSOC;
2157}
98c8fccf
JB		 2158static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2159 struct ieee80211_mgmt *mgmt,
2160 size_t len,
2161 struct ieee80211_rx_status *rx_status,
2162 struct ieee802_11_elems *elems,
2163 bool beacon)
2164{
2165 struct ieee80211_local *local = sdata->local;
2166 int freq;
c2b13452 2167 struct ieee80211_bss *bss;
98c8fccf 2168 struct ieee80211_channel *channel;
56007a02
JB		 2169 bool need_ps = false;
2170
66e67e41 2171 if (sdata->u.mgd.associated &&
888d04df
FF		 2172 compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
2173 == 0) {
56007a02
JB		 2174 bss = (void *)sdata->u.mgd.associated->priv;
2175 /* not previously set so we may need to recalc */
2176 need_ps = !bss->dtim_period;
2177 }
98c8fccf
JB		 2178
2179 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2180 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2181 rx_status->band);
98c8fccf
JB		 2182 else
2183 freq = rx_status->freq;
2184
2185 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2186
2187 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2188 return;
2189
98c8fccf 2190 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2191 channel, beacon);
77fdaa12
JB		 2192 if (bss)
2193 ieee80211_rx_bss_put(local, bss);
2194
2195 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2196 return;
2197
56007a02
JB		 2198 if (need_ps) {
2199 mutex_lock(&local->iflist_mtx);
2200 ieee80211_recalc_ps(local, -1);
2201 mutex_unlock(&local->iflist_mtx);
2202 }
2203
c481ec97 2204 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2205 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2206 ETH_ALEN) == 0)) {
c481ec97
S		 2207 struct ieee80211_channel_sw_ie *sw_elem =
2208 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2209 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2210 bss, rx_status->mactime);
c481ec97 2211 }
f0706e82
JB		 2212}
2213
2214
f698d856 2215static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2216 struct sk_buff *skb)
f0706e82 2217{
af6b6374 2218 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2219 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2220 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2221 size_t baselen, len = skb->len;
ae6a44e3
EK		 2222 struct ieee802_11_elems elems;
2223
15b7b062
KV		 2224 ifmgd = &sdata->u.mgd;
2225
77fdaa12
JB		 2226 ASSERT_MGD_MTX(ifmgd);
2227
888d04df 2228 if (compare_ether_addr(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2229 return; /* ignore ProbeResp to foreign address */
2230
ae6a44e3
EK		 2231 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2232 if (baselen > len)
2233 return;
2234
2235 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2236 &elems);
2237
98c8fccf 2238 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2239
77fdaa12 2240 if (ifmgd->associated &&
888d04df 2241 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
4e5ff376 2242 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2243
2244 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
888d04df
FF		 2245 compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
2246 == 0) {
66e67e41
JB		 2247 /* got probe response, continue with auth */
2248 printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
2249 ifmgd->auth_data->tries = 0;
2250 ifmgd->auth_data->timeout = jiffies;
2251 run_again(ifmgd, ifmgd->auth_data->timeout);
2252 }
f0706e82
JB		 2253}
2254
d91f36db
JB		 2255/*
2256 * This is the canonical list of information elements we care about,
2257 * the filter code also gives us all changes to the Microsoft OUI
2258 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2259 *
2260 * We implement beacon filtering in software since that means we can
2261 * avoid processing the frame here and in cfg80211, and userspace
2262 * will not be able to tell whether the hardware supports it or not.
2263 *
2264 * XXX: This list needs to be dynamic -- userspace needs to be able to
2265 * add items it requires. It also needs to be able to tell us to
2266 * look out for other vendor IEs.
2267 */
2268static const u64 care_about_ies =
1d4df3a5
JB		 2269 (1ULL << WLAN_EID_COUNTRY) |
2270 (1ULL << WLAN_EID_ERP_INFO) |
2271 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2272 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2273 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2274 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2275
f698d856 2276static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2277 struct ieee80211_mgmt *mgmt,
2278 size_t len,
2279 struct ieee80211_rx_status *rx_status)
2280{
d91f36db 2281 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2282 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2283 size_t baselen;
2284 struct ieee802_11_elems elems;
f698d856 2285 struct ieee80211_local *local = sdata->local;
471b3efd 2286 u32 changed = 0;
d91f36db 2287 bool erp_valid, directed_tim = false;
7a5158ef 2288 u8 erp_value = 0;
d91f36db 2289 u32 ncrc;
77fdaa12
JB		 2290 u8 *bssid;
2291
66e67e41 2292 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2293
ae6a44e3
EK		 2294 /* Process beacon from the current BSS */
2295 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2296 if (baselen > len)
2297 return;
2298
d91f36db 2299 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2300 return;
f0706e82 2301
66e67e41 2302 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
888d04df
FF		 2303 compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
2304 == 0) {
66e67e41
JB		 2305 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2306 len - baselen, &elems);
77fdaa12 2307
66e67e41
JB		 2308 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2309 false);
2310 ifmgd->assoc_data->have_beacon = true;
2311 ifmgd->assoc_data->sent_assoc = false;
2312 /* continue assoc process */
2313 ifmgd->assoc_data->timeout = jiffies;
2314 run_again(ifmgd, ifmgd->assoc_data->timeout);
2315 return;
2316 }
77fdaa12 2317
66e67e41 2318 if (!ifmgd->associated ||
888d04df 2319 compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2320 return;
66e67e41 2321 bssid = ifmgd->associated->bssid;
f0706e82 2322
17e4ec14
JM		 2323 /* Track average RSSI from the Beacon frames of the current AP */
2324 ifmgd->last_beacon_signal = rx_status->signal;
2325 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2326 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2327 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2328 ifmgd->last_cqm_event_signal = 0;
391a200a 2329 ifmgd->count_beacon_signal = 1;
615f7b9b 2330 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2331 } else {
2332 ifmgd->ave_beacon_signal =
2333 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2334 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2335 ifmgd->ave_beacon_signal) / 16;
391a200a 2336 ifmgd->count_beacon_signal++;
17e4ec14 2337 }
615f7b9b
MV		 2338
2339 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2340 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2341 int sig = ifmgd->ave_beacon_signal;
2342 int last_sig = ifmgd->last_ave_beacon_signal;
2343
2344 /*
2345 * if signal crosses either of the boundaries, invoke callback
2346 * with appropriate parameters
2347 */
2348 if (sig > ifmgd->rssi_max_thold &&
2349 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2350 ifmgd->last_ave_beacon_signal = sig;
2351 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2352 } else if (sig < ifmgd->rssi_min_thold &&
2353 (last_sig >= ifmgd->rssi_max_thold ||
2354 last_sig == 0)) {
2355 ifmgd->last_ave_beacon_signal = sig;
2356 drv_rssi_callback(local, RSSI_EVENT_LOW);
2357 }
2358 }
2359
17e4ec14 2360 if (bss_conf->cqm_rssi_thold &&
391a200a 2361 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2362 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2363 int sig = ifmgd->ave_beacon_signal / 16;
2364 int last_event = ifmgd->last_cqm_event_signal;
2365 int thold = bss_conf->cqm_rssi_thold;
2366 int hyst = bss_conf->cqm_rssi_hyst;
2367 if (sig < thold &&
2368 (last_event == 0 || sig < last_event - hyst)) {
2369 ifmgd->last_cqm_event_signal = sig;
2370 ieee80211_cqm_rssi_notify(
2371 &sdata->vif,
2372 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2373 GFP_KERNEL);
2374 } else if (sig > thold &&
2375 (last_event == 0 || sig > last_event + hyst)) {
2376 ifmgd->last_cqm_event_signal = sig;
2377 ieee80211_cqm_rssi_notify(
2378 &sdata->vif,
2379 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2380 GFP_KERNEL);
2381 }
2382 }
2383
b291ba11 2384 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 2385#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2386 if (net_ratelimit()) {
2387 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 2388 "to a received beacon\n", sdata->name);
92778180
JM		 2389 }
2390#endif
b291ba11 2391 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 2392 mutex_lock(&local->iflist_mtx);
2393 ieee80211_recalc_ps(local, -1);
2394 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2395 }
2396
b291ba11
JB		 2397 /*
2398 * Push the beacon loss detection into the future since
2399 * we are processing a beacon from the AP just now.
2400 */
d3a910a8 2401 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2402
d91f36db
JB		 2403 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2404 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2405 len - baselen, &elems,
2406 care_about_ies, ncrc);
2407
2408 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2409 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2410 ifmgd->aid);
d91f36db 2411
d8ec4433 2412 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2413 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2414 true);
d91f36db 2415
4ced3f74 2416 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2417 elems.wmm_param_len);
2418 }
fe3fa827 2419
25c9c875 2420 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2421 if (directed_tim) {
572e0012 2422 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2423 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2424 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2425 ieee80211_hw_config(local,
2426 IEEE80211_CONF_CHANGE_PS);
2427 }
572e0012 2428 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2429 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2430 local->pspolling = true;
2431
2432 /*
2433 * Here is assumed that the driver will be
2434 * able to send ps-poll frame and receive a
2435 * response even though power save mode is
2436 * enabled, but some drivers might require
2437 * to disable power save here. This needs
2438 * to be investigated.
2439 */
2440 ieee80211_send_pspoll(local, sdata);
2441 }
a97b77b9
VN		 2442 }
2443 }
7a5158ef 2444
d8ec4433 2445 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2446 return;
2447 ifmgd->beacon_crc = ncrc;
d8ec4433 2448 ifmgd->beacon_crc_valid = true;
30196673 2449
7a5158ef
JB		 2450 if (elems.erp_info && elems.erp_info_len >= 1) {
2451 erp_valid = true;
2452 erp_value = elems.erp_info[0];
2453 } else {
2454 erp_valid = false;
50c4afb9 2455 }
7a5158ef
JB		 2456 changed |= ieee80211_handle_bss_capability(sdata,
2457 le16_to_cpu(mgmt->u.beacon.capab_info),
2458 erp_valid, erp_value);
f0706e82 2459
d3c990fb 2460
074d46d1 2461 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2462 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2463 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2464
2465 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2466
24398e39
JB		 2467 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2468 bssid, true);
d3c990fb
RR		 2469 }
2470
8b19e6ca 2471 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2472 if (elems.country_elem) {
a8302de9
VT		 2473 /* TODO: IBSS also needs this */
2474 if (elems.pwr_constr_elem)
2475 ieee80211_handle_pwr_constr(sdata,
2476 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2477 elems.pwr_constr_elem,
2478 elems.pwr_constr_elem_len);
3f2355cb
LR		 2479 }
2480
471b3efd 2481 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2482}
2483
1fa57d01
JB		 2484void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2485 struct sk_buff *skb)
f0706e82 2486{
77fdaa12 2487 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2488 struct ieee80211_rx_status *rx_status;
f0706e82 2489 struct ieee80211_mgmt *mgmt;
66e67e41 2490 struct cfg80211_bss *bss = NULL;
77fdaa12 2491 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2492 u16 fc;
2493
f0706e82
JB		 2494 rx_status = (struct ieee80211_rx_status *) skb->cb;
2495 mgmt = (struct ieee80211_mgmt *) skb->data;
2496 fc = le16_to_cpu(mgmt->frame_control);
2497
77fdaa12
JB		 2498 mutex_lock(&ifmgd->mtx);
2499
66e67e41
JB		 2500 switch (fc & IEEE80211_FCTL_STYPE) {
2501 case IEEE80211_STYPE_BEACON:
2502 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2503 break;
2504 case IEEE80211_STYPE_PROBE_RESP:
2505 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2506 break;
2507 case IEEE80211_STYPE_AUTH:
2508 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2509 break;
2510 case IEEE80211_STYPE_DEAUTH:
2511 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2512 break;
2513 case IEEE80211_STYPE_DISASSOC:
2514 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2515 break;
2516 case IEEE80211_STYPE_ASSOC_RESP:
2517 case IEEE80211_STYPE_REASSOC_RESP:
2518 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2519 break;
2520 case IEEE80211_STYPE_ACTION:
2521 switch (mgmt->u.action.category) {
2522 case WLAN_CATEGORY_SPECTRUM_MGMT:
2523 ieee80211_sta_process_chanswitch(sdata,
2524 &mgmt->u.action.u.chan_switch.sw_elem,
2525 (void *)ifmgd->associated->priv,
2526 rx_status->mactime);
77fdaa12 2527 break;
77fdaa12 2528 }
77fdaa12 2529 }
77fdaa12
JB		 2530 mutex_unlock(&ifmgd->mtx);
2531
66e67e41
JB		 2532 switch (rma) {
2533 case RX_MGMT_NONE:
2534 /* no action */
2535 break;
2536 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2537 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2538 break;
2539 case RX_MGMT_CFG80211_DISASSOC:
2540 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2541 break;
2542 case RX_MGMT_CFG80211_RX_AUTH:
2543 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2544 break;
2545 case RX_MGMT_CFG80211_RX_ASSOC:
2546 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2547 break;
2548 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2549 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2550 break;
2551 default:
2552 WARN(1, "unexpected: %d", rma);
b054b747 2553 }
f0706e82
JB		 2554}
2555
9c6bd790 2556static void ieee80211_sta_timer(unsigned long data)
f0706e82 2557{
60f8b39c
JB		 2558 struct ieee80211_sub_if_data *sdata =
2559 (struct ieee80211_sub_if_data *) data;
46900298 2560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2561 struct ieee80211_local *local = sdata->local;
f0706e82 2562
5bb644a0
JB		 2563 if (local->quiescing) {
2564 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2565 return;
2566 }
2567
64592c8f 2568 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2569}
2570
04ac3c0e 2571static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2572 u8 *bssid, u8 reason)
04ac3c0e
FF		 2573{
2574 struct ieee80211_local *local = sdata->local;
2575 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2576 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e
FF		 2577
2578 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2579 IEEE80211_STA_BEACON_POLL);
2580
37ad3888
JB		 2581 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2582 false, frame_buf);
04ac3c0e 2583 mutex_unlock(&ifmgd->mtx);
37ad3888 2584
04ac3c0e
FF		 2585 /*
2586 * must be outside lock due to cfg80211,
2587 * but that's not a problem.
2588 */
5fef7dbc 2589 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2590
2591 mutex_lock(&local->mtx);
2592 ieee80211_recalc_idle(local);
2593 mutex_unlock(&local->mtx);
2594
04ac3c0e
FF		 2595 mutex_lock(&ifmgd->mtx);
2596}
2597
66e67e41
JB		 2598static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2599{
2600 struct ieee80211_local *local = sdata->local;
2601 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2602 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2603
2604 lockdep_assert_held(&ifmgd->mtx);
2605
2606 if (WARN_ON_ONCE(!auth_data))
2607 return -EINVAL;
2608
66e67e41
JB		 2609 auth_data->tries++;
2610
2611 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
2612 printk(KERN_DEBUG "%s: authentication with %pM timed out\n",
2613 sdata->name, auth_data->bss->bssid);
2614
2615 /*
2616 * Most likely AP is not in the range so remove the
2617 * bss struct for that AP.
2618 */
2619 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2620
2621 return -ETIMEDOUT;
2622 }
2623
2624 if (auth_data->bss->proberesp_ies) {
2625 printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n",
2626 sdata->name, auth_data->bss->bssid, auth_data->tries,
2627 IEEE80211_AUTH_MAX_TRIES);
2628
2629 auth_data->expected_transaction = 2;
2630 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2631 auth_data->ie, auth_data->ie_len,
2632 auth_data->bss->bssid,
2633 auth_data->bss->bssid, NULL, 0, 0);
2634 } else {
2635 const u8 *ssidie;
2636
2637 printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
2638 sdata->name, auth_data->bss->bssid, auth_data->tries,
2639 IEEE80211_AUTH_MAX_TRIES);
2640
2641 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2642 if (!ssidie)
2643 return -EINVAL;
2644 /*
2645 * Direct probe is sent to broadcast address as some APs
2646 * will not answer to direct packet in unassociated state.
2647 */
2648 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2649 NULL, 0, (u32) -1, true, false);
2650 }
2651
2652 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2653 run_again(ifmgd, auth_data->timeout);
2654
2655 return 0;
2656}
2657
2658static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2659{
2660 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2661 struct ieee80211_local *local = sdata->local;
2662
2663 lockdep_assert_held(&sdata->u.mgd.mtx);
2664
66e67e41
JB		 2665 assoc_data->tries++;
2666 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
2667 printk(KERN_DEBUG "%s: association with %pM timed out\n",
2668 sdata->name, assoc_data->bss->bssid);
2669
2670 /*
2671 * Most likely AP is not in the range so remove the
2672 * bss struct for that AP.
2673 */
2674 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2675
2676 return -ETIMEDOUT;
2677 }
2678
2679 printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n",
2680 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2681 IEEE80211_ASSOC_MAX_TRIES);
2682 ieee80211_send_assoc(sdata);
2683
2684 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2685 run_again(&sdata->u.mgd, assoc_data->timeout);
2686
2687 return 0;
2688}
2689
1fa57d01 2690void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2691{
9c6bd790 2692 struct ieee80211_local *local = sdata->local;
1fa57d01 2693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2694
77fdaa12
JB		 2695 mutex_lock(&ifmgd->mtx);
2696
66e67e41
JB		 2697 if (ifmgd->auth_data &&
2698 time_after(jiffies, ifmgd->auth_data->timeout)) {
2699 if (ifmgd->auth_data->done) {
2700 /*
2701 * ok ... we waited for assoc but userspace didn't,
2702 * so let's just kill the auth data
2703 */
2704 ieee80211_destroy_auth_data(sdata, false);
2705 } else if (ieee80211_probe_auth(sdata)) {
2706 u8 bssid[ETH_ALEN];
2707
2708 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2709
2710 ieee80211_destroy_auth_data(sdata, false);
2711
2712 mutex_unlock(&ifmgd->mtx);
2713 cfg80211_send_auth_timeout(sdata->dev, bssid);
2714 mutex_lock(&ifmgd->mtx);
2715 }
2716 } else if (ifmgd->auth_data)
2717 run_again(ifmgd, ifmgd->auth_data->timeout);
2718
2719 if (ifmgd->assoc_data &&
2720 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2721 if (!ifmgd->assoc_data->have_beacon ||
2722 ieee80211_do_assoc(sdata)) {
2723 u8 bssid[ETH_ALEN];
2724
2725 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2726
2727 ieee80211_destroy_assoc_data(sdata, false);
2728
2729 mutex_unlock(&ifmgd->mtx);
2730 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2731 mutex_lock(&ifmgd->mtx);
2732 }
2733 } else if (ifmgd->assoc_data)
2734 run_again(ifmgd, ifmgd->assoc_data->timeout);
2735
b291ba11
JB		 2736 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2737 IEEE80211_STA_CONNECTION_POLL) &&
2738 ifmgd->associated) {
a43abf29 2739 u8 bssid[ETH_ALEN];
72a8a3ed 2740 int max_tries;
a43abf29 2741
0c1ad2ca 2742 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2743
72a8a3ed 2744 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2745 max_tries = max_nullfunc_tries;
72a8a3ed 2746 else
180205bd 2747 max_tries = max_probe_tries;
72a8a3ed 2748
4e5ff376
FF		 2749 /* ACK received for nullfunc probing frame */
2750 if (!ifmgd->probe_send_count)
2751 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2752 else if (ifmgd->nullfunc_failed) {
2753 if (ifmgd->probe_send_count < max_tries) {
2754#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2755 wiphy_debug(local->hw.wiphy,
2756 "%s: No ack for nullfunc frame to"
bfc31df3 2757 " AP %pM, try %d/%i\n",
04ac3c0e 2758 sdata->name, bssid,
bfc31df3 2759 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2760#endif
2761 ieee80211_mgd_probe_ap_send(sdata);
2762 } else {
2763#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2764 wiphy_debug(local->hw.wiphy,
2765 "%s: No ack for nullfunc frame to"
2766 " AP %pM, disconnecting.\n",
c658e5db 2767 sdata->name, bssid);
04ac3c0e 2768#endif
95acac61
JB		 2769 ieee80211_sta_connection_lost(sdata, bssid,
2770 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2771 }
2772 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2773 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2774 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2775#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2776 wiphy_debug(local->hw.wiphy,
2777 "%s: Failed to send nullfunc to AP %pM"
2778 " after %dms, disconnecting.\n",
2779 sdata->name,
180205bd 2780 bssid, probe_wait_ms);
04ac3c0e 2781#endif
95acac61
JB		 2782 ieee80211_sta_connection_lost(sdata, bssid,
2783 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2784 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2785#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2786 wiphy_debug(local->hw.wiphy,
2787 "%s: No probe response from AP %pM"
bfc31df3 2788 " after %dms, try %d/%i\n",
b38afa87 2789 sdata->name,
180205bd 2790 bssid, probe_wait_ms,
bfc31df3 2791 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2792#endif
2793 ieee80211_mgd_probe_ap_send(sdata);
2794 } else {
b291ba11
JB		 2795 /*
2796 * We actually lost the connection ... or did we?
2797 * Let's make sure!
2798 */
b38afa87
BG		 2799 wiphy_debug(local->hw.wiphy,
2800 "%s: No probe response from AP %pM"
2801 " after %dms, disconnecting.\n",
2802 sdata->name,
180205bd 2803 bssid, probe_wait_ms);
04ac3c0e 2804
95acac61
JB		 2805 ieee80211_sta_connection_lost(sdata, bssid,
2806 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2807 }
2808 }
2809
77fdaa12 2810 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2811
2812 mutex_lock(&local->mtx);
2813 ieee80211_recalc_idle(local);
2814 mutex_unlock(&local->mtx);
f0706e82
JB		 2815}
2816
b291ba11
JB		 2817static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2818{
2819 struct ieee80211_sub_if_data *sdata =
2820 (struct ieee80211_sub_if_data *) data;
2821 struct ieee80211_local *local = sdata->local;
2822
2823 if (local->quiescing)
2824 return;
2825
1e4dcd01
JO		 2826 ieee80211_queue_work(&sdata->local->hw,
2827 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2828}
2829
2830static void ieee80211_sta_conn_mon_timer(unsigned long data)
2831{
2832 struct ieee80211_sub_if_data *sdata =
2833 (struct ieee80211_sub_if_data *) data;
2834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2835 struct ieee80211_local *local = sdata->local;
2836
2837 if (local->quiescing)
2838 return;
2839
42935eca 2840 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2841}
2842
2843static void ieee80211_sta_monitor_work(struct work_struct *work)
2844{
2845 struct ieee80211_sub_if_data *sdata =
2846 container_of(work, struct ieee80211_sub_if_data,
2847 u.mgd.monitor_work);
2848
2849 ieee80211_mgd_probe_ap(sdata, false);
2850}
2851
9c6bd790
JB		 2852static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2853{
494f1fe5
EP		 2854 u32 flags;
2855
ad935687 2856 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2857 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2858 IEEE80211_STA_CONNECTION_POLL);
ad935687 2859
b291ba11 2860 /* let's probe the connection once */
494f1fe5
EP		 2861 flags = sdata->local->hw.flags;
2862 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2863 ieee80211_queue_work(&sdata->local->hw,
2864 &sdata->u.mgd.monitor_work);
b291ba11 2865 /* and do all the other regular work too */
64592c8f 2866 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2867 }
9c6bd790 2868}
f0706e82 2869
5bb644a0
JB		 2870#ifdef CONFIG_PM
2871void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2872{
2873 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2874
2875 /*
2876 * we need to use atomic bitops for the running bits
2877 * only because both timers might fire at the same
2878 * time -- the code here is properly synchronised.
2879 */
2880
d1f5b7a3
JB		 2881 cancel_work_sync(&ifmgd->request_smps_work);
2882
0ecfe806 2883 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2884 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2885 if (del_timer_sync(&ifmgd->timer))
2886 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2887
2888 cancel_work_sync(&ifmgd->chswitch_work);
2889 if (del_timer_sync(&ifmgd->chswitch_timer))
2890 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2891
b291ba11
JB		 2892 /* these will just be re-established on connection */
2893 del_timer_sync(&ifmgd->conn_mon_timer);
2894 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2895}
2896
2897void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2898{
2899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2900
676b58c2
RM		 2901 if (!ifmgd->associated)
2902 return;
2903
95acac61
JB		 2904 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2905 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2906 mutex_lock(&ifmgd->mtx);
2907 if (ifmgd->associated) {
2908#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2909 wiphy_debug(sdata->local->hw.wiphy,
2910 "%s: driver requested disconnect after resume.\n",
2911 sdata->name);
2912#endif
2913 ieee80211_sta_connection_lost(sdata,
2914 ifmgd->associated->bssid,
2915 WLAN_REASON_UNSPECIFIED);
2916 mutex_unlock(&ifmgd->mtx);
2917 return;
2918 }
2919 mutex_unlock(&ifmgd->mtx);
2920 }
2921
5bb644a0
JB		 2922 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2923 add_timer(&ifmgd->timer);
2924 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2925 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2926 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2927 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2928}
2929#endif
2930
9c6bd790
JB		 2931/* interface setup */
2932void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2933{
46900298 2934 struct ieee80211_if_managed *ifmgd;
988c0f72 2935
46900298 2936 ifmgd = &sdata->u.mgd;
b291ba11 2937 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2938 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2939 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2940 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2941 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2942 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2943 (unsigned long) sdata);
b291ba11
JB		 2944 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2945 (unsigned long) sdata);
2946 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2947 (unsigned long) sdata);
46900298 2948 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2949 (unsigned long) sdata);
9c6bd790 2950
ab1faead 2951 ifmgd->flags = 0;
1478acb3 2952 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2953 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2954 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2955
77fdaa12 2956 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2957
2958 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2959 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2960 else
2961 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2962}
2963
77fdaa12
JB		 2964/* scan finished notification */
2965void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2966{
77fdaa12 2967 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2968
77fdaa12
JB		 2969 /* Restart STA timers */
2970 rcu_read_lock();
2971 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2972 ieee80211_restart_sta_timer(sdata);
2973 rcu_read_unlock();
2974}
60f8b39c 2975
77fdaa12
JB		 2976int ieee80211_max_network_latency(struct notifier_block *nb,
2977 unsigned long data, void *dummy)
2978{
2979 s32 latency_usec = (s32) data;
2980 struct ieee80211_local *local =
2981 container_of(nb, struct ieee80211_local,
2982 network_latency_notifier);
1fa6f4af 2983
77fdaa12
JB		 2984 mutex_lock(&local->iflist_mtx);
2985 ieee80211_recalc_ps(local, latency_usec);
2986 mutex_unlock(&local->iflist_mtx);
dfe67012 2987
77fdaa12 2988 return 0;
9c6bd790
JB		 2989}
2990
a1cf775d 2991static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 2992 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 2993{
2994 struct ieee80211_local *local = sdata->local;
2995 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 2996 struct ieee80211_bss *bss = (void *)cbss->priv;
a1cf775d
JB		 2997 struct sta_info *sta;
2998 bool have_sta = false;
2999 int err;
24398e39
JB		 3000 int ht_cfreq;
3001 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3002 const u8 *ht_oper_ie;
3003 const struct ieee80211_ht_operation *ht_oper = NULL;
3004 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3005
3006 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3007 return -EINVAL;
3008
3009 if (assoc) {
3010 rcu_read_lock();
5d6a1b06 3011 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3012 rcu_read_unlock();
3013 }
3014
3015 if (!have_sta) {
5d6a1b06 3016 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3017 if (!sta)
3018 return -ENOMEM;
3019 }
3020
3021 mutex_lock(&local->mtx);
3022 ieee80211_recalc_idle(sdata->local);
3023 mutex_unlock(&local->mtx);
3024
3025 /* switch to the right channel */
24398e39
JB		 3026 sband = local->hw.wiphy->bands[cbss->channel->band];
3027
3028 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3029
3030 if (sband->ht_cap.ht_supported) {
3031 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3032 cbss->information_elements,
3033 cbss->len_information_elements);
3034 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3035 ht_oper = (void *)(ht_oper_ie + 2);
3036 }
3037
3038 if (ht_oper) {
3039 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3040 cbss->channel->band);
3041 /* check that channel matches the right operating channel */
3042 if (cbss->channel->center_freq != ht_cfreq) {
3043 /*
3044 * It's possible that some APs are confused here;
3045 * Netgear WNDR3700 sometimes reports 4 higher than
3046 * the actual channel in association responses, but
3047 * since we look at probe response/beacon data here
3048 * it should be OK.
3049 */
3050 printk(KERN_DEBUG
3051 "%s: Wrong control channel: center-freq: %d"
3052 " ht-cfreq: %d ht->primary_chan: %d"
3053 " band: %d. Disabling HT.\n",
3054 sdata->name, cbss->channel->center_freq,
3055 ht_cfreq, ht_oper->primary_chan,
3056 cbss->channel->band);
3057 ht_oper = NULL;
3058 }
3059 }
3060
3061 if (ht_oper) {
3062 channel_type = NL80211_CHAN_HT20;
3063
3064 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3065 switch (ht_oper->ht_param &
3066 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3067 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3068 channel_type = NL80211_CHAN_HT40PLUS;
3069 break;
3070 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3071 channel_type = NL80211_CHAN_HT40MINUS;
3072 break;
3073 }
3074 }
3075 }
3076
3077 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3078 /* can only fail due to HT40+/- mismatch */
3079 channel_type = NL80211_CHAN_HT20;
3080 printk(KERN_DEBUG
3081 "%s: disabling 40 MHz due to multi-vif mismatch\n",
3082 sdata->name);
3083 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3084 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3085 channel_type));
3086 }
3087
5d6a1b06 3088 local->oper_channel = cbss->channel;
24398e39 3089 ieee80211_hw_config(local, 0);
a1cf775d
JB		 3090
3091 if (!have_sta) {
5d6a1b06
JB		 3092 u32 rates = 0, basic_rates = 0;
3093 bool have_higher_than_11mbit;
3094 int min_rate = INT_MAX, min_rate_index = -1;
3095
5d6a1b06
JB		 3096 ieee80211_get_rates(sband, bss->supp_rates,
3097 bss->supp_rates_len,
3098 &rates, &basic_rates,
3099 &have_higher_than_11mbit,
3100 &min_rate, &min_rate_index);
3101
3102 /*
3103 * This used to be a workaround for basic rates missing
3104 * in the association response frame. Now that we no
3105 * longer use the basic rates from there, it probably
3106 * doesn't happen any more, but keep the workaround so
3107 * in case some *other* APs are buggy in different ways
3108 * we can connect -- with a warning.
3109 */
3110 if (!basic_rates && min_rate_index >= 0) {
3111 printk(KERN_DEBUG
3112 "%s: No basic rates, using min rate instead.\n",
3113 sdata->name);
3114 basic_rates = BIT(min_rate_index);
3115 }
3116
3117 sta->sta.supp_rates[cbss->channel->band] = rates;
3118 sdata->vif.bss_conf.basic_rates = basic_rates;
3119
3120 /* cf. IEEE 802.11 9.2.12 */
3121 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3122 have_higher_than_11mbit)
3123 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3124 else
3125 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3126
3127 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3128
3129 /* tell driver about BSSID and basic rates */
3130 ieee80211_bss_info_change_notify(sdata,
3131 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3132
3133 if (assoc)
3134 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3135
3136 err = sta_info_insert(sta);
3137 sta = NULL;
3138 if (err) {
3139 printk(KERN_DEBUG
3140 "%s: failed to insert STA entry for the AP (error %d)\n",
3141 sdata->name, err);
3142 return err;
3143 }
3144 } else
5d6a1b06 3145 WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3146
3147 return 0;
3148}
3149
77fdaa12
JB		 3150/* config hooks */
3151int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3152 struct cfg80211_auth_request *req)
9c6bd790 3153{
66e67e41
JB		 3154 struct ieee80211_local *local = sdata->local;
3155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3156 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3157 u16 auth_alg;
66e67e41
JB		 3158 int err;
3159
3160 /* prepare auth data structure */
9c6bd790 3161
77fdaa12
JB		 3162 switch (req->auth_type) {
3163 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3164 auth_alg = WLAN_AUTH_OPEN;
3165 break;
3166 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3167 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3168 return -EOPNOTSUPP;
77fdaa12
JB		 3169 auth_alg = WLAN_AUTH_SHARED_KEY;
3170 break;
3171 case NL80211_AUTHTYPE_FT:
3172 auth_alg = WLAN_AUTH_FT;
3173 break;
3174 case NL80211_AUTHTYPE_NETWORK_EAP:
3175 auth_alg = WLAN_AUTH_LEAP;
3176 break;
3177 default:
3178 return -EOPNOTSUPP;
60f8b39c 3179 }
77fdaa12 3180
66e67e41
JB		 3181 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3182 if (!auth_data)
9c6bd790 3183 return -ENOMEM;
77fdaa12 3184
66e67e41 3185 auth_data->bss = req->bss;
77fdaa12
JB		 3186
3187 if (req->ie && req->ie_len) {
66e67e41
JB		 3188 memcpy(auth_data->ie, req->ie, req->ie_len);
3189 auth_data->ie_len = req->ie_len;
9c6bd790 3190 }
77fdaa12 3191
fffd0934 3192 if (req->key && req->key_len) {
66e67e41
JB		 3193 auth_data->key_len = req->key_len;
3194 auth_data->key_idx = req->key_idx;
3195 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3196 }
3197
66e67e41 3198 auth_data->algorithm = auth_alg;
60f8b39c 3199
66e67e41 3200 /* try to authenticate/probe */
2a33bee2 3201
66e67e41 3202 mutex_lock(&ifmgd->mtx);
2a33bee2 3203
66e67e41
JB		 3204 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3205 ifmgd->assoc_data) {
3206 err = -EBUSY;
3207 goto err_free;
2a33bee2
GE		 3208 }
3209
66e67e41
JB		 3210 if (ifmgd->auth_data)
3211 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3212
66e67e41
JB		 3213 /* prep auth_data so we don't go into idle on disassoc */
3214 ifmgd->auth_data = auth_data;
af6b6374 3215
66e67e41 3216 if (ifmgd->associated)
37ad3888 3217 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3218
66e67e41
JB		 3219 printk(KERN_DEBUG "%s: authenticate with %pM\n",
3220 sdata->name, req->bss->bssid);
e5b900d2 3221
a1cf775d
JB		 3222 err = ieee80211_prep_connection(sdata, req->bss, false);
3223 if (err)
66e67e41 3224 goto err_clear;
af6b6374 3225
66e67e41
JB		 3226 err = ieee80211_probe_auth(sdata);
3227 if (err) {
66e67e41
JB		 3228 sta_info_destroy_addr(sdata, req->bss->bssid);
3229 goto err_clear;
3230 }
3231
3232 /* hold our own reference */
3233 cfg80211_ref_bss(auth_data->bss);
3234 err = 0;
3235 goto out_unlock;
3236
3237 err_clear:
3238 ifmgd->auth_data = NULL;
3239 err_free:
3240 kfree(auth_data);
3241 out_unlock:
3242 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3243
66e67e41 3244 return err;
af6b6374
JB		 3245}
3246
77fdaa12
JB		 3247int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3248 struct cfg80211_assoc_request *req)
f0706e82 3249{
66e67e41 3250 struct ieee80211_local *local = sdata->local;
77fdaa12 3251 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3252 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3253 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3254 struct ieee80211_supported_band *sband;
66e67e41 3255 const u8 *ssidie;
2a33bee2 3256 int i, err;
f0706e82 3257
66e67e41
JB		 3258 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3259 if (!ssidie)
3260 return -EINVAL;
3261
3262 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3263 if (!assoc_data)
3264 return -ENOMEM;
3265
77fdaa12 3266 mutex_lock(&ifmgd->mtx);
9c87ba67 3267
66e67e41 3268 if (ifmgd->associated)
37ad3888 3269 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3270
3271 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3272 err = -EBUSY;
3273 goto err_free;
af6b6374 3274 }
77fdaa12 3275
66e67e41
JB		 3276 if (ifmgd->assoc_data) {
3277 err = -EBUSY;
3278 goto err_free;
3279 }
77fdaa12 3280
66e67e41
JB		 3281 if (ifmgd->auth_data) {
3282 bool match;
3283
3284 /* keep sta info, bssid if matching */
888d04df 3285 match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
66e67e41 3286 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3287 }
3288
66e67e41
JB		 3289 /* prepare assoc data */
3290
77fdaa12 3291 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3292 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3293
d8ec4433
JO		 3294 ifmgd->beacon_crc_valid = false;
3295
de5036aa
JB		 3296 /*
3297 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3298 * We still associate in non-HT mode (11a/b/g) if any one of these
3299 * ciphers is configured as pairwise.
3300 * We can set this to true for non-11n hardware, that'll be checked
3301 * separately along with the peer capabilities.
3302 */
77fdaa12
JB		 3303 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
3304 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3305 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
3306 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
3307 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3308
ef96a842
BG		 3309 if (req->flags & ASSOC_REQ_DISABLE_HT)
3310 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3311
4e74bfdb
JB		 3312 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3313 sband = local->hw.wiphy->bands[req->bss->channel->band];
3314 if (!sband->ht_cap.ht_supported ||
3315 local->hw.queues < 4 || !bss->wmm_used)
3316 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3317
ef96a842
BG		 3318 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3319 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3320 sizeof(ifmgd->ht_capa_mask));
3321
77fdaa12 3322 if (req->ie && req->ie_len) {
66e67e41
JB		 3323 memcpy(assoc_data->ie, req->ie, req->ie_len);
3324 assoc_data->ie_len = req->ie_len;
3325 }
f679f65d 3326
66e67e41 3327 assoc_data->bss = req->bss;
f679f65d 3328
af6b6374
JB		 3329 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3330 if (ifmgd->powersave)
3331 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3332 else
3333 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3334 } else
3335 ifmgd->ap_smps = ifmgd->req_smps;
3336
66e67e41 3337 assoc_data->capability = req->bss->capability;
76f0303d 3338 assoc_data->wmm = bss->wmm_used && (local->hw.queues >= 4);
66e67e41
JB		 3339 assoc_data->supp_rates = bss->supp_rates;
3340 assoc_data->supp_rates_len = bss->supp_rates_len;
074d46d1
JB		 3341 assoc_data->ht_operation_ie =
3342 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
63f170e0 3343
ab13315a
KV		 3344 if (bss->wmm_used && bss->uapsd_supported &&
3345 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3346 assoc_data->uapsd = true;
ab13315a
KV		 3347 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3348 } else {
76f0303d 3349 assoc_data->uapsd = false;
ab13315a
KV		 3350 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3351 }
3352
66e67e41
JB		 3353 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3354 assoc_data->ssid_len = ssidie[1];
63f170e0 3355
77fdaa12 3356 if (req->prev_bssid)
66e67e41 3357 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3358
3359 if (req->use_mfp) {
3360 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3361 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3362 } else {
3363 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3364 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3365 }
3366
3367 if (req->crypto.control_port)
3368 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3369 else
3370 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3371
a621fa4d
JB		 3372 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3373 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3374
66e67e41
JB		 3375 /* kick off associate process */
3376
3377 ifmgd->assoc_data = assoc_data;
3378
a1cf775d
JB		 3379 err = ieee80211_prep_connection(sdata, req->bss, true);
3380 if (err)
3381 goto err_clear;
66e67e41
JB		 3382
3383 if (!bss->dtim_period &&
3384 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3385 /*
3386 * Wait up to one beacon interval ...
3387 * should this be more if we miss one?
3388 */
3389 printk(KERN_DEBUG "%s: waiting for beacon from %pM\n",
3390 sdata->name, ifmgd->bssid);
3391 assoc_data->timeout = jiffies +
3392 TU_TO_EXP_TIME(req->bss->beacon_interval);
3393 } else {
3394 assoc_data->have_beacon = true;
3395 assoc_data->sent_assoc = false;
3396 assoc_data->timeout = jiffies;
3397 }
3398 run_again(ifmgd, assoc_data->timeout);
3399
fcff4f10
PS		 3400 if (bss->corrupt_data) {
3401 char *corrupt_type = "data";
3402 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3403 if (bss->corrupt_data &
3404 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3405 corrupt_type = "beacon and probe response";
3406 else
3407 corrupt_type = "beacon";
3408 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3409 corrupt_type = "probe response";
3410 printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n",
3411 sdata->name, corrupt_type);
3412 }
3413
66e67e41
JB		 3414 err = 0;
3415 goto out;
3416 err_clear:
3417 ifmgd->assoc_data = NULL;
3418 err_free:
3419 kfree(assoc_data);
3420 out:
3421 mutex_unlock(&ifmgd->mtx);
3422
3423 return err;
f0706e82
JB		 3424}
3425
77fdaa12 3426int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3427 struct cfg80211_deauth_request *req)
f0706e82 3428{
46900298 3429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3430 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3431
77fdaa12
JB		 3432 mutex_lock(&ifmgd->mtx);
3433
37ad3888 3434 if (ifmgd->auth_data) {
66e67e41 3435 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3436 mutex_unlock(&ifmgd->mtx);
66e67e41 3437 return 0;
af6b6374 3438 }
77fdaa12 3439
37ad3888
JB		 3440 printk(KERN_DEBUG
3441 "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 3442 sdata->name, req->bssid, req->reason_code);
0ff71613 3443
37ad3888 3444 if (ifmgd->associated &&
888d04df 3445 compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
37ad3888 3446 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3447 req->reason_code, true, frame_buf);
37ad3888
JB		 3448 else
3449 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3450 IEEE80211_STYPE_DEAUTH,
3451 req->reason_code, true,
3452 frame_buf);
3453 mutex_unlock(&ifmgd->mtx);
3454
5fef7dbc 3455 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3456
7da7cc1d 3457 mutex_lock(&sdata->local->mtx);
bc83b681 3458 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3459 mutex_unlock(&sdata->local->mtx);
bc83b681 3460
f0706e82
JB		 3461 return 0;
3462}
84363e6e 3463
77fdaa12 3464int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3465 struct cfg80211_disassoc_request *req)
9c6bd790 3466{
77fdaa12 3467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3468 u8 bssid[ETH_ALEN];
5fef7dbc 3469 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3470
77fdaa12 3471 mutex_lock(&ifmgd->mtx);
10f644a4 3472
8d8b261a
JB		 3473 /*
3474 * cfg80211 should catch this ... but it's racy since
3475 * we can receive a disassoc frame, process it, hand it
3476 * to cfg80211 while that's in a locked section already
3477 * trying to tell us that the user wants to disconnect.
3478 */
0c1ad2ca 3479 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3480 mutex_unlock(&ifmgd->mtx);
3481 return -ENOLINK;
3482 }
3483
0ff71613 3484 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 3485 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3486
e69e95db 3487 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3488 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3489 req->reason_code, !req->local_state_change,
3490 frame_buf);
77fdaa12 3491 mutex_unlock(&ifmgd->mtx);
10f644a4 3492
5fef7dbc 3493 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3494
7da7cc1d 3495 mutex_lock(&sdata->local->mtx);
bc83b681 3496 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3497 mutex_unlock(&sdata->local->mtx);
bc83b681 3498
10f644a4
JB		 3499 return 0;
3500}
026331c4 3501
54e4ffb2
JB		 3502void ieee80211_mgd_teardown(struct ieee80211_sub_if_data *sdata)
3503{
3504 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3505
3506 mutex_lock(&ifmgd->mtx);
3507 if (ifmgd->assoc_data)
3508 ieee80211_destroy_assoc_data(sdata, false);
3509 if (ifmgd->auth_data)
3510 ieee80211_destroy_auth_data(sdata, false);
3511 del_timer_sync(&ifmgd->timer);
3512 mutex_unlock(&ifmgd->mtx);
3513}
3514
a97c13c3
JO		 3515void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3516 enum nl80211_cqm_rssi_threshold_event rssi_event,
3517 gfp_t gfp)
3518{
3519 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3520
b5878a2d
JB		 3521 trace_api_cqm_rssi_notify(sdata, rssi_event);
3522
a97c13c3
JO		 3523 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3524}
3525EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 3526
3527unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
3528{
3529 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3530 return sdata->dev->operstate;
3531}
3532EXPORT_SYMBOL(ieee80211_get_operstate);
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