projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
iwlagn: signedness bug
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
180205bd
BG		 31static int max_nullfunc_tries = 2;
32module_param(max_nullfunc_tries, int, 0644);
33MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
35
36static int max_probe_tries = 5;
37module_param(max_probe_tries, int, 0644);
38MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 40
41/*
7ccc8bd7
FF		 42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
b291ba11 48 */
7ccc8bd7
FF		 49#define IEEE80211_BEACON_LOSS_COUNT 7
50
b291ba11
JB		 51/*
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
54 */
d1c5091f 55#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 56/*
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
60 */
180205bd
BG		 61static int probe_wait_ms = 500;
62module_param(probe_wait_ms, int, 0644);
63MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
f0706e82 66
17e4ec14
JM		 67/*
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
70 * between 1 and 15.
71 */
72#define IEEE80211_SIGNAL_AVE_WEIGHT 3
73
391a200a
JM		 74/*
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
77 */
78#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
79
5bb644a0
JB		 80#define TMR_RUNNING_TIMER 0
81#define TMR_RUNNING_CHANSW 1
82
77fdaa12
JB		 83/*
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
88 */
89enum rx_mgmt_action {
90 /* no action required */
91 RX_MGMT_NONE,
92
77fdaa12
JB		 93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
95
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB		 98};
99
5484e237 100/* utils */
77fdaa12
JB		 101static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
102{
46a5ebaf 103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 104}
105
ca386f31
JB		 106/*
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
114 * do that.
115 */
116static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
118{
119 ASSERT_MGD_MTX(ifmgd);
120
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
124}
125
d3a910a8 126void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 127{
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
129 return;
130
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 133}
134
be099e82
LR		 135void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
136{
0c699c3a
LR		 137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
138
8628172f
SG		 139 if (unlikely(!sdata->u.mgd.associated))
140 return;
141
be099e82
LR		 142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
143 return;
144
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 147
148 ifmgd->probe_send_count = 0;
be099e82
LR		 149}
150
5484e237 151static int ecw2cw(int ecw)
60f8b39c 152{
5484e237 153 return (1 << ecw) - 1;
60f8b39c
JB		 154}
155
d5522e03
JB		 156/*
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
160 */
161static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
77fdaa12 163 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 164{
165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_supported_band *sband;
d5522e03
JB		 167 struct sta_info *sta;
168 u32 changed = 0;
172710bf 169 int hti_cfreq;
9ed6bcce 170 u16 ht_opmode;
0aaffa9b
JB		 171 bool enable_ht = true;
172 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 173 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
174
175 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
176
0aaffa9b
JB		 177 prev_chantype = sdata->vif.bss_conf.channel_type;
178
d5522e03
JB		 179 /* HT is not supported */
180 if (!sband->ht_cap.ht_supported)
181 enable_ht = false;
182
172710bf
BG		 183 if (enable_ht) {
184 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
185 sband->band);
186 /* check that channel matches the right operating channel */
187 if (local->hw.conf.channel->center_freq != hti_cfreq) {
188 /* Some APs mess this up, evidently.
189 * Netgear WNDR3700 sometimes reports 4 higher than
190 * the actual channel, for instance.
191 */
192 printk(KERN_DEBUG
193 "%s: Wrong control channel in association"
194 " response: configured center-freq: %d"
195 " hti-cfreq: %d hti->control_chan: %d"
196 " band: %d. Disabling HT.\n",
197 sdata->name,
198 local->hw.conf.channel->center_freq,
199 hti_cfreq, hti->control_chan,
200 sband->band);
201 enable_ht = false;
202 }
203 }
d5522e03
JB		 204
205 if (enable_ht) {
206 channel_type = NL80211_CHAN_HT20;
207
208 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
209 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
210 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
211 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
212 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 213 if (!(local->hw.conf.channel->flags &
214 IEEE80211_CHAN_NO_HT40PLUS))
215 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 216 break;
217 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 218 if (!(local->hw.conf.channel->flags &
219 IEEE80211_CHAN_NO_HT40MINUS))
220 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 221 break;
222 }
223 }
224 }
225
fe6f212c
RC		 226 if (local->tmp_channel)
227 local->tmp_channel_type = channel_type;
d5522e03 228
0aaffa9b
JB		 229 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
230 /* can only fail due to HT40+/- mismatch */
231 channel_type = NL80211_CHAN_HT20;
232 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
233 }
d5522e03 234
0aaffa9b
JB		 235 /* channel_type change automatically detected */
236 ieee80211_hw_config(local, 0);
d5522e03 237
0aaffa9b 238 if (prev_chantype != channel_type) {
d5522e03 239 rcu_read_lock();
abe60632 240 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 241 if (sta)
242 rate_control_rate_update(local, sband, sta,
4fa00437 243 IEEE80211_RC_HT_CHANGED,
0aaffa9b 244 channel_type);
d5522e03 245 rcu_read_unlock();
0aaffa9b 246 }
d5522e03 247
9ed6bcce 248 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 249
250 /* if bss configuration changed store the new one */
0aaffa9b
JB		 251 if (sdata->ht_opmode_valid != enable_ht ||
252 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
253 prev_chantype != channel_type) {
d5522e03 254 changed |= BSS_CHANGED_HT;
9ed6bcce 255 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 256 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 257 }
258
259 return changed;
260}
261
9c6bd790
JB		 262/* frame sending functions */
263
ef422bc0 264static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 265 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 266 void *cookie, bool send_frame)
9ac19a90
JB		 267{
268 struct ieee80211_local *local = sdata->local;
46900298 269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 270 struct sk_buff *skb;
271 struct ieee80211_mgmt *mgmt;
9aed3cc1 272
65fc73ac 273 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
d15b8459 274 if (!skb)
9ac19a90 275 return;
d15b8459 276
9ac19a90
JB		 277 skb_reserve(skb, local->hw.extra_tx_headroom);
278
279 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
280 memset(mgmt, 0, 24);
77fdaa12 281 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 282 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 283 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 284 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 285 skb_put(skb, 2);
ef422bc0 286 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 287 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
288
53b46b84 289 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 290 if (cookie)
291 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
292 else
293 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 294 else
ce470613
HS		 295 if (cookie)
296 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
297 else
298 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 299 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
300 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 301
302 if (send_frame)
303 ieee80211_tx_skb(sdata, skb);
304 else
305 kfree_skb(skb);
9ac19a90
JB		 306}
307
572e0012
KV		 308void ieee80211_send_pspoll(struct ieee80211_local *local,
309 struct ieee80211_sub_if_data *sdata)
310{
572e0012
KV		 311 struct ieee80211_pspoll *pspoll;
312 struct sk_buff *skb;
572e0012 313
d8cd189e
KV		 314 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
315 if (!skb)
572e0012 316 return;
572e0012 317
d8cd189e
KV		 318 pspoll = (struct ieee80211_pspoll *) skb->data;
319 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 320
62ae67be
JB		 321 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
322 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 323}
324
965bedad
JB		 325void ieee80211_send_nullfunc(struct ieee80211_local *local,
326 struct ieee80211_sub_if_data *sdata,
327 int powersave)
328{
329 struct sk_buff *skb;
d8cd189e 330 struct ieee80211_hdr_3addr *nullfunc;
965bedad 331
d8cd189e
KV		 332 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
333 if (!skb)
965bedad 334 return;
965bedad 335
d8cd189e 336 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 337 if (powersave)
d8cd189e 338 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 339
62ae67be
JB		 340 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
341 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 342}
343
d524215f
FF		 344static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
345 struct ieee80211_sub_if_data *sdata)
346{
347 struct sk_buff *skb;
348 struct ieee80211_hdr *nullfunc;
349 __le16 fc;
350
351 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
352 return;
353
354 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 355 if (!skb)
d524215f 356 return;
d15b8459 357
d524215f
FF		 358 skb_reserve(skb, local->hw.extra_tx_headroom);
359
360 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
361 memset(nullfunc, 0, 30);
362 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
363 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
364 nullfunc->frame_control = fc;
365 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
366 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
367 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
368 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
369
370 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
371 ieee80211_tx_skb(sdata, skb);
372}
373
cc32abd4
JB		 374/* spectrum management related things */
375static void ieee80211_chswitch_work(struct work_struct *work)
376{
377 struct ieee80211_sub_if_data *sdata =
378 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 379 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
380
9607e6b6 381 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 382 return;
383
77fdaa12
JB		 384 mutex_lock(&ifmgd->mtx);
385 if (!ifmgd->associated)
386 goto out;
cc32abd4
JB		 387
388 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 389 if (!sdata->local->ops->channel_switch) {
390 /* call "hw_config" only if doing sw channel switch */
391 ieee80211_hw_config(sdata->local,
392 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 393 } else {
394 /* update the device channel directly */
395 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 396 }
77fdaa12 397
cc32abd4 398 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 399 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 400
cc32abd4
JB		 401 ieee80211_wake_queues_by_reason(&sdata->local->hw,
402 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 403 out:
404 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
405 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 406}
407
5ce6e438
JB		 408void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
409{
410 struct ieee80211_sub_if_data *sdata;
411 struct ieee80211_if_managed *ifmgd;
412
413 sdata = vif_to_sdata(vif);
414 ifmgd = &sdata->u.mgd;
415
416 trace_api_chswitch_done(sdata, success);
417 if (!success) {
418 /*
419 * If the channel switch was not successful, stay
420 * around on the old channel. We currently lack
421 * good handling of this situation, possibly we
422 * should just drop the association.
423 */
424 sdata->local->csa_channel = sdata->local->oper_channel;
425 }
426
427 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
428}
429EXPORT_SYMBOL(ieee80211_chswitch_done);
430
cc32abd4
JB		 431static void ieee80211_chswitch_timer(unsigned long data)
432{
433 struct ieee80211_sub_if_data *sdata =
434 (struct ieee80211_sub_if_data *) data;
435 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
436
5bb644a0
JB		 437 if (sdata->local->quiescing) {
438 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
439 return;
440 }
441
42935eca 442 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 443}
444
445void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
446 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 447 struct ieee80211_bss *bss,
448 u64 timestamp)
cc32abd4 449{
0c1ad2ca
JB		 450 struct cfg80211_bss *cbss =
451 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 452 struct ieee80211_channel *new_ch;
453 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 454 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
455 cbss->channel->band);
cc32abd4 456
77fdaa12
JB		 457 ASSERT_MGD_MTX(ifmgd);
458
459 if (!ifmgd->associated)
cc32abd4
JB		 460 return;
461
fbe9c429 462 if (sdata->local->scanning)
cc32abd4
JB		 463 return;
464
465 /* Disregard subsequent beacons if we are already running a timer
466 processing a CSA */
467
468 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
469 return;
470
471 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
472 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
473 return;
474
475 sdata->local->csa_channel = new_ch;
476
5ce6e438
JB		 477 if (sdata->local->ops->channel_switch) {
478 /* use driver's channel switch callback */
479 struct ieee80211_channel_switch ch_switch;
480 memset(&ch_switch, 0, sizeof(ch_switch));
481 ch_switch.timestamp = timestamp;
482 if (sw_elem->mode) {
483 ch_switch.block_tx = true;
484 ieee80211_stop_queues_by_reason(&sdata->local->hw,
485 IEEE80211_QUEUE_STOP_REASON_CSA);
486 }
487 ch_switch.channel = new_ch;
488 ch_switch.count = sw_elem->count;
489 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
490 drv_channel_switch(sdata->local, &ch_switch);
491 return;
492 }
493
494 /* channel switch handled in software */
cc32abd4 495 if (sw_elem->count <= 1) {
42935eca 496 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 497 } else {
9feaddc7
WYG		 498 if (sw_elem->mode)
499 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 500 IEEE80211_QUEUE_STOP_REASON_CSA);
501 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
502 mod_timer(&ifmgd->chswitch_timer,
503 jiffies +
504 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 505 cbss->beacon_interval));
cc32abd4
JB		 506 }
507}
508
509static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
510 u16 capab_info, u8 *pwr_constr_elem,
511 u8 pwr_constr_elem_len)
512{
513 struct ieee80211_conf *conf = &sdata->local->hw.conf;
514
515 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
516 return;
517
518 /* Power constraint IE length should be 1 octet */
519 if (pwr_constr_elem_len != 1)
520 return;
521
522 if ((*pwr_constr_elem <= conf->channel->max_power) &&
523 (*pwr_constr_elem != sdata->local->power_constr_level)) {
524 sdata->local->power_constr_level = *pwr_constr_elem;
525 ieee80211_hw_config(sdata->local, 0);
526 }
527}
528
f90754c1
JO		 529void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
530{
531 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
532 struct ieee80211_local *local = sdata->local;
533 struct ieee80211_conf *conf = &local->hw.conf;
534
535 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
536 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
537 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
538
539 local->disable_dynamic_ps = false;
540 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
541}
542EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
543
544void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
545{
546 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
547 struct ieee80211_local *local = sdata->local;
548 struct ieee80211_conf *conf = &local->hw.conf;
549
550 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
551 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
552 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
553
554 local->disable_dynamic_ps = true;
555 conf->dynamic_ps_timeout = 0;
556 del_timer_sync(&local->dynamic_ps_timer);
557 ieee80211_queue_work(&local->hw,
558 &local->dynamic_ps_enable_work);
559}
560EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
561
965bedad
JB		 562/* powersave */
563static void ieee80211_enable_ps(struct ieee80211_local *local,
564 struct ieee80211_sub_if_data *sdata)
565{
566 struct ieee80211_conf *conf = &local->hw.conf;
567
d5edaedc
JB		 568 /*
569 * If we are scanning right now then the parameters will
570 * take effect when scan finishes.
571 */
fbe9c429 572 if (local->scanning)
d5edaedc
JB		 573 return;
574
965bedad
JB		 575 if (conf->dynamic_ps_timeout > 0 &&
576 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
577 mod_timer(&local->dynamic_ps_timer, jiffies +
578 msecs_to_jiffies(conf->dynamic_ps_timeout));
579 } else {
580 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
581 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 582
2a13052f
JO		 583 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
584 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
585 return;
586
587 conf->flags |= IEEE80211_CONF_PS;
588 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 589 }
590}
591
592static void ieee80211_change_ps(struct ieee80211_local *local)
593{
594 struct ieee80211_conf *conf = &local->hw.conf;
595
596 if (local->ps_sdata) {
965bedad
JB		 597 ieee80211_enable_ps(local, local->ps_sdata);
598 } else if (conf->flags & IEEE80211_CONF_PS) {
599 conf->flags &= ~IEEE80211_CONF_PS;
600 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
601 del_timer_sync(&local->dynamic_ps_timer);
602 cancel_work_sync(&local->dynamic_ps_enable_work);
603 }
604}
605
808118cb
JY		 606static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
607{
608 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
609 struct sta_info *sta = NULL;
610 u32 sta_flags = 0;
611
612 if (!mgd->powersave)
613 return false;
614
615 if (!mgd->associated)
616 return false;
617
618 if (!mgd->associated->beacon_ies)
619 return false;
620
621 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
622 IEEE80211_STA_CONNECTION_POLL))
623 return false;
624
625 rcu_read_lock();
626 sta = sta_info_get(sdata, mgd->bssid);
627 if (sta)
628 sta_flags = get_sta_flags(sta);
629 rcu_read_unlock();
630
631 if (!(sta_flags & WLAN_STA_AUTHORIZED))
632 return false;
633
634 return true;
635}
636
965bedad 637/* need to hold RTNL or interface lock */
10f644a4 638void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 639{
640 struct ieee80211_sub_if_data *sdata, *found = NULL;
641 int count = 0;
195e294d 642 int timeout;
965bedad
JB		 643
644 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
645 local->ps_sdata = NULL;
646 return;
647 }
648
af6b6374
JB		 649 if (!list_empty(&local->work_list)) {
650 local->ps_sdata = NULL;
651 goto change;
652 }
653
965bedad 654 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 655 if (!ieee80211_sdata_running(sdata))
965bedad 656 continue;
8c7914de
RM		 657 if (sdata->vif.type == NL80211_IFTYPE_AP) {
658 /* If an AP vif is found, then disable PS
659 * by setting the count to zero thereby setting
660 * ps_sdata to NULL.
661 */
662 count = 0;
663 break;
664 }
965bedad
JB		 665 if (sdata->vif.type != NL80211_IFTYPE_STATION)
666 continue;
667 found = sdata;
668 count++;
669 }
670
808118cb 671 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 672 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 673 s32 beaconint_us;
674
675 if (latency < 0)
ed77134b 676 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 677
678 beaconint_us = ieee80211_tu_to_usec(
679 found->vif.bss_conf.beacon_int);
680
ff616381 681 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 682 if (timeout < 0) {
683 /*
ff616381
JO		 684 * Go to full PSM if the user configures a very low
685 * latency requirement.
0ab82b04
EP		 686 * The 2000 second value is there for compatibility
687 * until the PM_QOS_NETWORK_LATENCY is configured
688 * with real values.
195e294d 689 */
0ab82b04
EP		 690 if (latency > (1900 * USEC_PER_MSEC) &&
691 latency != (2000 * USEC_PER_SEC))
195e294d 692 timeout = 0;
ff616381
JO		 693 else
694 timeout = 100;
195e294d 695 }
f90754c1
JO		 696 local->dynamic_ps_user_timeout = timeout;
697 if (!local->disable_dynamic_ps)
698 conf->dynamic_ps_timeout =
699 local->dynamic_ps_user_timeout;
195e294d 700
04fe2037 701 if (beaconint_us > latency) {
10f644a4 702 local->ps_sdata = NULL;
04fe2037 703 } else {
56007a02 704 struct ieee80211_bss *bss;
04fe2037 705 int maxslp = 1;
56007a02 706 u8 dtimper;
04fe2037 707
56007a02
JB		 708 bss = (void *)found->u.mgd.associated->priv;
709 dtimper = bss->dtim_period;
710
711 /* If the TIM IE is invalid, pretend the value is 1 */
712 if (!dtimper)
713 dtimper = 1;
714 else if (dtimper > 1)
04fe2037
JB		 715 maxslp = min_t(int, dtimper,
716 latency / beaconint_us);
717
9ccebe61 718 local->hw.conf.max_sleep_period = maxslp;
56007a02 719 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 720 local->ps_sdata = found;
04fe2037 721 }
10f644a4 722 } else {
965bedad 723 local->ps_sdata = NULL;
10f644a4 724 }
965bedad 725
af6b6374 726 change:
965bedad
JB		 727 ieee80211_change_ps(local);
728}
729
730void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
731{
732 struct ieee80211_local *local =
733 container_of(work, struct ieee80211_local,
734 dynamic_ps_disable_work);
735
736 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
737 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
738 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
739 }
740
741 ieee80211_wake_queues_by_reason(&local->hw,
742 IEEE80211_QUEUE_STOP_REASON_PS);
743}
744
745void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
746{
747 struct ieee80211_local *local =
748 container_of(work, struct ieee80211_local,
749 dynamic_ps_enable_work);
750 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 751 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 752 unsigned long flags;
753 int q;
965bedad
JB		 754
755 /* can only happen when PS was just disabled anyway */
756 if (!sdata)
757 return;
758
5e34069c
CL		 759 ifmgd = &sdata->u.mgd;
760
965bedad
JB		 761 if (local->hw.conf.flags & IEEE80211_CONF_PS)
762 return;
763
77b7023a
AN		 764 if (!local->disable_dynamic_ps &&
765 local->hw.conf.dynamic_ps_timeout > 0) {
766 /* don't enter PS if TX frames are pending */
767 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 768 mod_timer(&local->dynamic_ps_timer, jiffies +
769 msecs_to_jiffies(
770 local->hw.conf.dynamic_ps_timeout));
771 return;
772 }
77b7023a
AN		 773
774 /*
775 * transmission can be stopped by others which leads to
776 * dynamic_ps_timer expiry. Postpone the ps timer if it
777 * is not the actual idle state.
778 */
779 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
780 for (q = 0; q < local->hw.queues; q++) {
781 if (local->queue_stop_reasons[q]) {
782 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
783 flags);
784 mod_timer(&local->dynamic_ps_timer, jiffies +
785 msecs_to_jiffies(
786 local->hw.conf.dynamic_ps_timeout));
787 return;
788 }
789 }
790 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 791 }
1ddc2867 792
375177bf 793 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 794 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
795 netif_tx_stop_all_queues(sdata->dev);
965bedad 796
e8306f98
VN		 797 if (drv_tx_frames_pending(local))
798 mod_timer(&local->dynamic_ps_timer, jiffies +
799 msecs_to_jiffies(
800 local->hw.conf.dynamic_ps_timeout));
801 else {
802 ieee80211_send_nullfunc(local, sdata, 1);
803 /* Flush to get the tx status of nullfunc frame */
804 drv_flush(local, false);
805 }
f3e85b9e
VN		 806 }
807
2a13052f
JO		 808 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
809 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 810 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
811 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
812 local->hw.conf.flags |= IEEE80211_CONF_PS;
813 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
814 }
f3e85b9e 815
77b7023a
AN		 816 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
817 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 818}
819
820void ieee80211_dynamic_ps_timer(unsigned long data)
821{
822 struct ieee80211_local *local = (void *) data;
823
78f1a8b7 824 if (local->quiescing || local->suspended)
5bb644a0
JB		 825 return;
826
42935eca 827 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 828}
829
60f8b39c 830/* MLME */
f698d856 831static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 832 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 833 u8 *wmm_param, size_t wmm_param_len)
834{
f0706e82 835 struct ieee80211_tx_queue_params params;
4ced3f74 836 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 837 size_t left;
838 int count;
ab13315a 839 u8 *pos, uapsd_queues = 0;
f0706e82 840
e1b3ec1a
SG		 841 if (!local->ops->conf_tx)
842 return;
843
af6b6374 844 if (local->hw.queues < 4)
3434fbd3
JB		 845 return;
846
847 if (!wmm_param)
848 return;
849
f0706e82
JB		 850 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
851 return;
ab13315a
KV		 852
853 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 854 uapsd_queues = local->uapsd_queues;
ab13315a 855
f0706e82 856 count = wmm_param[6] & 0x0f;
46900298 857 if (count == ifmgd->wmm_last_param_set)
f0706e82 858 return;
46900298 859 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 860
861 pos = wmm_param + 8;
862 left = wmm_param_len - 8;
863
864 memset(&params, 0, sizeof(params));
865
f0706e82
JB		 866 local->wmm_acm = 0;
867 for (; left >= 4; left -= 4, pos += 4) {
868 int aci = (pos[0] >> 5) & 0x03;
869 int acm = (pos[0] >> 4) & 0x01;
ab13315a 870 bool uapsd = false;
f0706e82
JB		 871 int queue;
872
873 switch (aci) {
0eeb59fe 874 case 1: /* AC_BK */
e100bb64 875 queue = 3;
988c0f72 876 if (acm)
0eeb59fe 877 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 878 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
879 uapsd = true;
f0706e82 880 break;
0eeb59fe 881 case 2: /* AC_VI */
e100bb64 882 queue = 1;
988c0f72 883 if (acm)
0eeb59fe 884 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 885 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
886 uapsd = true;
f0706e82 887 break;
0eeb59fe 888 case 3: /* AC_VO */
e100bb64 889 queue = 0;
988c0f72 890 if (acm)
0eeb59fe 891 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 892 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
893 uapsd = true;
f0706e82 894 break;
0eeb59fe 895 case 0: /* AC_BE */
f0706e82 896 default:
e100bb64 897 queue = 2;
988c0f72 898 if (acm)
0eeb59fe 899 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 900 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
901 uapsd = true;
f0706e82
JB		 902 break;
903 }
904
905 params.aifs = pos[0] & 0x0f;
906 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
907 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 908 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 909 params.uapsd = uapsd;
910
f4ea83dd 911#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 912 wiphy_debug(local->hw.wiphy,
913 "WMM queue=%d aci=%d acm=%d aifs=%d "
914 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
915 queue, aci, acm,
916 params.aifs, params.cw_min, params.cw_max,
917 params.txop, params.uapsd);
3330d7be 918#endif
2683d65b 919 local->tx_conf[queue] = params;
e1b3ec1a 920 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 921 wiphy_debug(local->hw.wiphy,
922 "failed to set TX queue parameters for queue %d\n",
923 queue);
f0706e82 924 }
e1b3ec1a
SG		 925
926 /* enable WMM or activate new settings */
4ced3f74
JB		 927 sdata->vif.bss_conf.qos = true;
928 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 929}
930
7a5158ef
JB		 931static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
932 u16 capab, bool erp_valid, u8 erp)
5628221c 933{
bda3933a 934 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 935 u32 changed = 0;
7a5158ef
JB		 936 bool use_protection;
937 bool use_short_preamble;
938 bool use_short_slot;
939
940 if (erp_valid) {
941 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
942 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
943 } else {
944 use_protection = false;
945 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
946 }
947
948 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 949 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
950 use_short_slot = true;
5628221c 951
471b3efd 952 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 953 bss_conf->use_cts_prot = use_protection;
954 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 955 }
7e9ed188 956
d43c7b37 957 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 958 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 959 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 960 }
d9430a32 961
7a5158ef 962 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 963 bss_conf->use_short_slot = use_short_slot;
964 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 965 }
966
967 return changed;
968}
969
f698d856 970static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 971 struct cfg80211_bss *cbss,
ae5eb026 972 u32 bss_info_changed)
f0706e82 973{
0c1ad2ca 974 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 975 struct ieee80211_local *local = sdata->local;
68542962 976 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 977
ae5eb026 978 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 979 /* set timing information */
68542962
JO		 980 bss_conf->beacon_int = cbss->beacon_interval;
981 bss_conf->timestamp = cbss->tsf;
5628221c 982
77fdaa12
JB		 983 bss_info_changed |= BSS_CHANGED_BEACON_INT;
984 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 985 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 986
7ccc8bd7
FF		 987 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
988 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
989
0c1ad2ca
JB		 990 sdata->u.mgd.associated = cbss;
991 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 992
17e4ec14
JM		 993 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
994
b291ba11
JB		 995 /* just to be sure */
996 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
997 IEEE80211_STA_BEACON_POLL);
998
9ac19a90 999 ieee80211_led_assoc(local, 1);
9306102e 1000
e5b900d2
JB		 1001 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1002 bss_conf->dtim_period = bss->dtim_period;
1003 else
1004 bss_conf->dtim_period = 0;
1005
68542962 1006 bss_conf->assoc = 1;
96dd22ac
JB		 1007 /*
1008 * For now just always ask the driver to update the basic rateset
1009 * when we have associated, we aren't checking whether it actually
1010 * changed or not.
1011 */
ae5eb026 1012 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1013
1014 /* And the BSSID changed - we're associated now */
1015 bss_info_changed |= BSS_CHANGED_BSSID;
1016
a97c13c3
JO		 1017 /* Tell the driver to monitor connection quality (if supported) */
1018 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 1019 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1020 bss_info_changed |= BSS_CHANGED_CQM;
1021
68542962
JO		 1022 /* Enable ARP filtering */
1023 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1024 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1025 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1026 }
1027
ae5eb026 1028 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1029
056508dc
JB		 1030 mutex_lock(&local->iflist_mtx);
1031 ieee80211_recalc_ps(local, -1);
025e6be2 1032 ieee80211_recalc_smps(local);
056508dc 1033 mutex_unlock(&local->iflist_mtx);
e0cb686f 1034
8a5b33f5 1035 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1036 netif_carrier_on(sdata->dev);
f0706e82
JB		 1037}
1038
e69e95db 1039static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1040 bool remove_sta, bool tx)
aa458d17 1041{
46900298 1042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1043 struct ieee80211_local *local = sdata->local;
1044 struct sta_info *sta;
e0cb686f 1045 u32 changed = 0, config_changed = 0;
b291ba11 1046 u8 bssid[ETH_ALEN];
aa458d17 1047
77fdaa12
JB		 1048 ASSERT_MGD_MTX(ifmgd);
1049
b291ba11
JB		 1050 if (WARN_ON(!ifmgd->associated))
1051 return;
1052
0c1ad2ca 1053 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1054
77fdaa12
JB		 1055 ifmgd->associated = NULL;
1056 memset(ifmgd->bssid, 0, ETH_ALEN);
1057
1058 /*
1059 * we need to commit the associated = NULL change because the
1060 * scan code uses that to determine whether this iface should
1061 * go to/wake up from powersave or not -- and could otherwise
1062 * wake the queues erroneously.
1063 */
1064 smp_mb();
1065
1066 /*
1067 * Thus, we can only afterwards stop the queues -- to account
1068 * for the case where another CPU is finishing a scan at this
1069 * time -- we don't want the scan code to enable queues.
1070 */
aa458d17 1071
8a5b33f5 1072 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1073 netif_carrier_off(sdata->dev);
1074
2a419056 1075 mutex_lock(&local->sta_mtx);
abe60632 1076 sta = sta_info_get(sdata, bssid);
4cad6c7c 1077 if (sta) {
2a419056 1078 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 1079 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1080 }
2a419056 1081 mutex_unlock(&local->sta_mtx);
aa458d17 1082
f5e5bf25
TW		 1083 changed |= ieee80211_reset_erp_info(sdata);
1084
f5e5bf25 1085 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1086 changed |= BSS_CHANGED_ASSOC;
1087 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1088
aa837e1d
JB		 1089 ieee80211_set_wmm_default(sdata);
1090
4797938c 1091 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1092 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1093
413ad50a
JB		 1094 /* on the next assoc, re-program HT parameters */
1095 sdata->ht_opmode_valid = false;
1096
a8302de9
VT		 1097 local->power_constr_level = 0;
1098
520eb820
KV		 1099 del_timer_sync(&local->dynamic_ps_timer);
1100 cancel_work_sync(&local->dynamic_ps_enable_work);
1101
e0cb686f
KV		 1102 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1103 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1104 config_changed |= IEEE80211_CONF_CHANGE_PS;
1105 }
a331400b 1106 local->ps_sdata = NULL;
ae5eb026 1107
e0cb686f 1108 ieee80211_hw_config(local, config_changed);
9cef8737 1109
68542962
JO		 1110 /* Disable ARP filtering */
1111 if (sdata->vif.bss_conf.arp_filter_enabled) {
1112 sdata->vif.bss_conf.arp_filter_enabled = false;
1113 changed |= BSS_CHANGED_ARP_FILTER;
1114 }
1115
0aaffa9b
JB		 1116 /* The BSSID (not really interesting) and HT changed */
1117 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1118 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1119
e69e95db
JM		 1120 if (remove_sta)
1121 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1122
1123 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1124 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1125 del_timer_sync(&sdata->u.mgd.timer);
1126 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1127}
f0706e82 1128
3cf335d5
KV		 1129void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1130 struct ieee80211_hdr *hdr)
1131{
1132 /*
1133 * We can postpone the mgd.timer whenever receiving unicast frames
1134 * from AP because we know that the connection is working both ways
1135 * at that time. But multicast frames (and hence also beacons) must
1136 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1137 * data idle periods for sending the periodic probe request to the
1138 * AP we're connected to.
3cf335d5 1139 */
b291ba11
JB		 1140 if (is_multicast_ether_addr(hdr->addr1))
1141 return;
1142
be099e82 1143 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1144}
f0706e82 1145
4e5ff376
FF		 1146static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1147{
1148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1149
1150 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1151 IEEE80211_STA_CONNECTION_POLL)))
1152 return;
1153
1154 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1155 IEEE80211_STA_BEACON_POLL);
1156 mutex_lock(&sdata->local->iflist_mtx);
1157 ieee80211_recalc_ps(sdata->local, -1);
1158 mutex_unlock(&sdata->local->iflist_mtx);
1159
1160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1161 return;
1162
1163 /*
1164 * We've received a probe response, but are not sure whether
1165 * we have or will be receiving any beacons or data, so let's
1166 * schedule the timers again, just in case.
1167 */
1168 ieee80211_sta_reset_beacon_monitor(sdata);
1169
1170 mod_timer(&ifmgd->conn_mon_timer,
1171 round_jiffies_up(jiffies +
1172 IEEE80211_CONNECTION_IDLE_TIME));
1173}
1174
1175void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1176 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1177{
75706d0e 1178 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1179 return;
1180
04ac3c0e
FF		 1181 if (ack)
1182 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1183
1184 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1185 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1186 if (ack)
1187 sdata->u.mgd.probe_send_count = 0;
1188 else
1189 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1190 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1191 }
1192}
1193
a43abf29
ML		 1194static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1195{
1196 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1197 const u8 *ssid;
f01a067d 1198 u8 *dst = ifmgd->associated->bssid;
180205bd 1199 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1200
1201 /*
1202 * Try sending broadcast probe requests for the last three
1203 * probe requests after the first ones failed since some
1204 * buggy APs only support broadcast probe requests.
1205 */
1206 if (ifmgd->probe_send_count >= unicast_limit)
1207 dst = NULL;
a43abf29 1208
4e5ff376
FF		 1209 /*
1210 * When the hardware reports an accurate Tx ACK status, it's
1211 * better to send a nullfunc frame instead of a probe request,
1212 * as it will kick us off the AP quickly if we aren't associated
1213 * anymore. The timeout will be reset if the frame is ACKed by
1214 * the AP.
1215 */
04ac3c0e
FF		 1216 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1217 ifmgd->nullfunc_failed = false;
4e5ff376 1218 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1219 } else {
4e5ff376 1220 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1221 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
85a237fe 1222 (u32) -1, true);
4e5ff376 1223 }
a43abf29
ML		 1224
1225 ifmgd->probe_send_count++;
180205bd 1226 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1227 run_again(ifmgd, ifmgd->probe_timeout);
1228}
1229
b291ba11
JB		 1230static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1231 bool beacon)
04de8381 1232{
04de8381 1233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1234 bool already = false;
34bfc411 1235
9607e6b6 1236 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1237 return;
1238
91a3bd76
LR		 1239 if (sdata->local->scanning)
1240 return;
1241
b8bc4b0a
JB		 1242 if (sdata->local->tmp_channel)
1243 return;
1244
77fdaa12
JB		 1245 mutex_lock(&ifmgd->mtx);
1246
1247 if (!ifmgd->associated)
1248 goto out;
1249
a860402d 1250#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1251 if (beacon && net_ratelimit())
1252 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1253 "- sending probe request\n", sdata->name);
a860402d 1254#endif
04de8381 1255
b291ba11
JB		 1256 /*
1257 * The driver/our work has already reported this event or the
1258 * connection monitoring has kicked in and we have already sent
1259 * a probe request. Or maybe the AP died and the driver keeps
1260 * reporting until we disassociate...
1261 *
1262 * In either case we have to ignore the current call to this
1263 * function (except for setting the correct probe reason bit)
1264 * because otherwise we would reset the timer every time and
1265 * never check whether we received a probe response!
1266 */
1267 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1268 IEEE80211_STA_CONNECTION_POLL))
1269 already = true;
1270
1271 if (beacon)
1272 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1273 else
1274 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1275
1276 if (already)
1277 goto out;
1278
4e751843
JB		 1279 mutex_lock(&sdata->local->iflist_mtx);
1280 ieee80211_recalc_ps(sdata->local, -1);
1281 mutex_unlock(&sdata->local->iflist_mtx);
1282
a43abf29
ML		 1283 ifmgd->probe_send_count = 0;
1284 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1285 out:
1286 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1287}
1288
a619a4c0
JO		 1289struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1290 struct ieee80211_vif *vif)
1291{
1292 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1294 struct sk_buff *skb;
1295 const u8 *ssid;
1296
1297 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1298 return NULL;
1299
1300 ASSERT_MGD_MTX(ifmgd);
1301
1302 if (!ifmgd->associated)
1303 return NULL;
1304
1305 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1306 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1307 (u32) -1, ssid + 2, ssid[1],
1308 NULL, 0, true);
a619a4c0
JO		 1309
1310 return skb;
1311}
1312EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1313
1e4dcd01
JO		 1314static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1315{
1316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1317 struct ieee80211_local *local = sdata->local;
1318 u8 bssid[ETH_ALEN];
1319
1320 mutex_lock(&ifmgd->mtx);
1321 if (!ifmgd->associated) {
1322 mutex_unlock(&ifmgd->mtx);
1323 return;
1324 }
1325
1326 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1327
180205bd
BG		 1328 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1329 sdata->name, bssid);
1e4dcd01 1330
53f73c09 1331 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1332 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1333
1334 mutex_lock(&local->mtx);
1335 ieee80211_recalc_idle(local);
1336 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1337 /*
1338 * must be outside lock due to cfg80211,
1339 * but that's not a problem.
1340 */
1341 ieee80211_send_deauth_disassoc(sdata, bssid,
1342 IEEE80211_STYPE_DEAUTH,
1343 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1344 NULL, true);
1e4dcd01
JO		 1345}
1346
1347void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1348{
1349 struct ieee80211_sub_if_data *sdata =
1350 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1351 u.mgd.beacon_connection_loss_work);
b291ba11 1352
1e4dcd01
JO		 1353 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1354 __ieee80211_connection_loss(sdata);
1355 else
1356 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1357}
1358
04de8381
KV		 1359void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1360{
1361 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1362 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1363
b5878a2d
JB		 1364 trace_api_beacon_loss(sdata);
1365
1e4dcd01
JO		 1366 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1367 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1368}
1369EXPORT_SYMBOL(ieee80211_beacon_loss);
1370
1e4dcd01
JO		 1371void ieee80211_connection_loss(struct ieee80211_vif *vif)
1372{
1373 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1374 struct ieee80211_hw *hw = &sdata->local->hw;
1375
b5878a2d
JB		 1376 trace_api_connection_loss(sdata);
1377
1e4dcd01
JO		 1378 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1379 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1380}
1381EXPORT_SYMBOL(ieee80211_connection_loss);
1382
1383
77fdaa12
JB		 1384static enum rx_mgmt_action __must_check
1385ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1386 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1387{
46900298 1388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1389 const u8 *bssid = NULL;
f0706e82
JB		 1390 u16 reason_code;
1391
f4ea83dd 1392 if (len < 24 + 2)
77fdaa12 1393 return RX_MGMT_NONE;
f0706e82 1394
77fdaa12
JB		 1395 ASSERT_MGD_MTX(ifmgd);
1396
0c1ad2ca 1397 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1398
1399 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1400
77fdaa12 1401 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1402 sdata->name, bssid, reason_code);
77fdaa12 1403
53f73c09 1404 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1405 mutex_lock(&sdata->local->mtx);
63f170e0 1406 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1407 mutex_unlock(&sdata->local->mtx);
f0706e82 1408
77fdaa12 1409 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1410}
1411
1412
77fdaa12
JB		 1413static enum rx_mgmt_action __must_check
1414ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1415 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1416{
46900298 1417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1418 u16 reason_code;
1419
f4ea83dd 1420 if (len < 24 + 2)
77fdaa12 1421 return RX_MGMT_NONE;
f0706e82 1422
77fdaa12
JB		 1423 ASSERT_MGD_MTX(ifmgd);
1424
1425 if (WARN_ON(!ifmgd->associated))
1426 return RX_MGMT_NONE;
1427
0c1ad2ca 1428 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1429 return RX_MGMT_NONE;
f0706e82
JB		 1430
1431 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1432
0ff71613 1433 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1434 sdata->name, mgmt->sa, reason_code);
f0706e82 1435
53f73c09 1436 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1437 mutex_lock(&sdata->local->mtx);
bc83b681 1438 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1439 mutex_unlock(&sdata->local->mtx);
77fdaa12 1440 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1441}
1442
1443
af6b6374
JB		 1444static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1445 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1446{
af6b6374 1447 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1449 struct ieee80211_local *local = sdata->local;
8318d78a 1450 struct ieee80211_supported_band *sband;
f0706e82 1451 struct sta_info *sta;
0c1ad2ca 1452 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1453 u8 *pos;
881d948c 1454 u32 rates, basic_rates;
af6b6374 1455 u16 capab_info, aid;
f0706e82 1456 struct ieee802_11_elems elems;
bda3933a 1457 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1458 u32 changed = 0;
5d1ec85f
JB		 1459 int i, j, err;
1460 bool have_higher_than_11mbit = false;
ae5eb026 1461 u16 ap_ht_cap_flags;
f0706e82 1462
af6b6374 1463 /* AssocResp and ReassocResp have identical structure */
f0706e82 1464
f0706e82 1465 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1466 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1467
1dd84aa2
JB		 1468 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1469 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1470 "set\n", sdata->name, aid);
1dd84aa2
JB		 1471 aid &= ~(BIT(15) | BIT(14));
1472
af6b6374
JB		 1473 pos = mgmt->u.assoc_resp.variable;
1474 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1475
f0706e82
JB		 1476 if (!elems.supp_rates) {
1477 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1478 sdata->name);
af6b6374 1479 return false;
f0706e82
JB		 1480 }
1481
46900298 1482 ifmgd->aid = aid;
f0706e82 1483
2a33bee2
GE		 1484 mutex_lock(&sdata->local->sta_mtx);
1485 /*
1486 * station info was already allocated and inserted before
1487 * the association and should be available to us
1488 */
1489 sta = sta_info_get_rx(sdata, cbss->bssid);
1490 if (WARN_ON(!sta)) {
1491 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 1492 return false;
77fdaa12 1493 }
05e5e883 1494
5d1ec85f
JB		 1495 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1496 WLAN_STA_ASSOC_AP);
1497 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1498 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1499
60f8b39c
JB		 1500 rates = 0;
1501 basic_rates = 0;
e7480bbb 1502 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1503
60f8b39c
JB		 1504 for (i = 0; i < elems.supp_rates_len; i++) {
1505 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1506 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1507
60f8b39c
JB		 1508 if (rate > 110)
1509 have_higher_than_11mbit = true;
1510
1511 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1512 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1513 rates |= BIT(j);
d61272cb
TW		 1514 if (is_basic)
1515 basic_rates |= BIT(j);
1516 break;
1517 }
f709fc69 1518 }
f709fc69
LCC		 1519 }
1520
60f8b39c
JB		 1521 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1522 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1523 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1524
60f8b39c
JB		 1525 if (rate > 110)
1526 have_higher_than_11mbit = true;
f0706e82 1527
60f8b39c 1528 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1529 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1530 rates |= BIT(j);
d61272cb
TW		 1531 if (is_basic)
1532 basic_rates |= BIT(j);
1533 break;
1534 }
60f8b39c 1535 }
1ebebea8 1536 }
f0706e82 1537
e7480bbb 1538 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1539 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1540
1541 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1542 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1543 have_higher_than_11mbit)
1544 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1545 else
1546 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1547
ab1faead 1548 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1549 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1550 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1551
1552 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1553
4b7679a5 1554 rate_control_rate_init(sta);
f0706e82 1555
46900298 1556 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1557 set_sta_flags(sta, WLAN_STA_MFP);
1558
ddf4ac53 1559 if (elems.wmm_param)
60f8b39c 1560 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1561
2a33bee2
GE		 1562 /* sta_info_reinsert will also unlock the mutex lock */
1563 err = sta_info_reinsert(sta);
5d1ec85f
JB		 1564 sta = NULL;
1565 if (err) {
1566 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1567 " the AP (error %d)\n", sdata->name, err);
90be561b 1568 return false;
ddf4ac53
JB		 1569 }
1570
f2176d72
JO		 1571 /*
1572 * Always handle WMM once after association regardless
1573 * of the first value the AP uses. Setting -1 here has
1574 * that effect because the AP values is an unsigned
1575 * 4-bit value.
1576 */
1577 ifmgd->wmm_last_param_set = -1;
1578
ddf4ac53 1579 if (elems.wmm_param)
4ced3f74 1580 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1581 elems.wmm_param_len);
aa837e1d
JB		 1582 else
1583 ieee80211_set_wmm_default(sdata);
f0706e82 1584
e4da8c37
JB		 1585 local->oper_channel = wk->chan;
1586
ae5eb026 1587 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1588 (sdata->local->hw.queues >= 4) &&
ab1faead 1589 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1590 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1591 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1592
60f8b39c
JB		 1593 /* set AID and assoc capability,
1594 * ieee80211_set_associated() will tell the driver */
1595 bss_conf->aid = aid;
1596 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1597 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1598
d524215f
FF		 1599 /*
1600 * If we're using 4-addr mode, let the AP know that we're
1601 * doing so, so that it can create the STA VLAN on its side
1602 */
1603 if (ifmgd->use_4addr)
1604 ieee80211_send_4addr_nullfunc(local, sdata);
1605
15b7b062 1606 /*
b291ba11
JB		 1607 * Start timer to probe the connection to the AP now.
1608 * Also start the timer that will detect beacon loss.
15b7b062 1609 */
b291ba11 1610 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1611 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1612
af6b6374 1613 return true;
f0706e82
JB		 1614}
1615
1616
98c8fccf
JB		 1617static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1618 struct ieee80211_mgmt *mgmt,
1619 size_t len,
1620 struct ieee80211_rx_status *rx_status,
1621 struct ieee802_11_elems *elems,
1622 bool beacon)
1623{
1624 struct ieee80211_local *local = sdata->local;
1625 int freq;
c2b13452 1626 struct ieee80211_bss *bss;
98c8fccf 1627 struct ieee80211_channel *channel;
56007a02
JB		 1628 bool need_ps = false;
1629
1630 if (sdata->u.mgd.associated) {
1631 bss = (void *)sdata->u.mgd.associated->priv;
1632 /* not previously set so we may need to recalc */
1633 need_ps = !bss->dtim_period;
1634 }
98c8fccf
JB		 1635
1636 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1637 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1638 rx_status->band);
98c8fccf
JB		 1639 else
1640 freq = rx_status->freq;
1641
1642 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1643
1644 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1645 return;
1646
98c8fccf 1647 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1648 channel, beacon);
77fdaa12
JB		 1649 if (bss)
1650 ieee80211_rx_bss_put(local, bss);
1651
1652 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1653 return;
1654
56007a02
JB		 1655 if (need_ps) {
1656 mutex_lock(&local->iflist_mtx);
1657 ieee80211_recalc_ps(local, -1);
1658 mutex_unlock(&local->iflist_mtx);
1659 }
1660
c481ec97 1661 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1662 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1663 ETH_ALEN) == 0)) {
c481ec97
S		 1664 struct ieee80211_channel_sw_ie *sw_elem =
1665 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1666 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1667 bss, rx_status->mactime);
c481ec97 1668 }
f0706e82
JB		 1669}
1670
1671
f698d856 1672static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1673 struct sk_buff *skb)
f0706e82 1674{
af6b6374 1675 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1676 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1677 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1678 size_t baselen, len = skb->len;
ae6a44e3
EK		 1679 struct ieee802_11_elems elems;
1680
15b7b062
KV		 1681 ifmgd = &sdata->u.mgd;
1682
77fdaa12
JB		 1683 ASSERT_MGD_MTX(ifmgd);
1684
47846c9b 1685 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1686 return; /* ignore ProbeResp to foreign address */
1687
ae6a44e3
EK		 1688 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1689 if (baselen > len)
1690 return;
1691
1692 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1693 &elems);
1694
98c8fccf 1695 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1696
77fdaa12 1697 if (ifmgd->associated &&
4e5ff376
FF		 1698 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1699 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1700}
1701
d91f36db
JB		 1702/*
1703 * This is the canonical list of information elements we care about,
1704 * the filter code also gives us all changes to the Microsoft OUI
1705 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1706 *
1707 * We implement beacon filtering in software since that means we can
1708 * avoid processing the frame here and in cfg80211, and userspace
1709 * will not be able to tell whether the hardware supports it or not.
1710 *
1711 * XXX: This list needs to be dynamic -- userspace needs to be able to
1712 * add items it requires. It also needs to be able to tell us to
1713 * look out for other vendor IEs.
1714 */
1715static const u64 care_about_ies =
1d4df3a5
JB		 1716 (1ULL << WLAN_EID_COUNTRY) |
1717 (1ULL << WLAN_EID_ERP_INFO) |
1718 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1719 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1720 (1ULL << WLAN_EID_HT_CAPABILITY) |
1721 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1722
f698d856 1723static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1724 struct ieee80211_mgmt *mgmt,
1725 size_t len,
1726 struct ieee80211_rx_status *rx_status)
1727{
d91f36db 1728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1729 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1730 size_t baselen;
1731 struct ieee802_11_elems elems;
f698d856 1732 struct ieee80211_local *local = sdata->local;
471b3efd 1733 u32 changed = 0;
d91f36db 1734 bool erp_valid, directed_tim = false;
7a5158ef 1735 u8 erp_value = 0;
d91f36db 1736 u32 ncrc;
77fdaa12
JB		 1737 u8 *bssid;
1738
1739 ASSERT_MGD_MTX(ifmgd);
f0706e82 1740
ae6a44e3
EK		 1741 /* Process beacon from the current BSS */
1742 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1743 if (baselen > len)
1744 return;
1745
d91f36db 1746 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1747 return;
f0706e82 1748
b291ba11
JB		 1749 /*
1750 * We might have received a number of frames, among them a
1751 * disassoc frame and a beacon...
1752 */
1753 if (!ifmgd->associated)
77fdaa12
JB		 1754 return;
1755
0c1ad2ca 1756 bssid = ifmgd->associated->bssid;
77fdaa12 1757
b291ba11
JB		 1758 /*
1759 * And in theory even frames from a different AP we were just
1760 * associated to a split-second ago!
1761 */
1762 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1763 return;
1764
17e4ec14
JM		 1765 /* Track average RSSI from the Beacon frames of the current AP */
1766 ifmgd->last_beacon_signal = rx_status->signal;
1767 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1768 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1769 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1770 ifmgd->last_cqm_event_signal = 0;
391a200a 1771 ifmgd->count_beacon_signal = 1;
615f7b9b 1772 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 1773 } else {
1774 ifmgd->ave_beacon_signal =
1775 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1776 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1777 ifmgd->ave_beacon_signal) / 16;
391a200a 1778 ifmgd->count_beacon_signal++;
17e4ec14 1779 }
615f7b9b
MV		 1780
1781 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1782 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1783 int sig = ifmgd->ave_beacon_signal;
1784 int last_sig = ifmgd->last_ave_beacon_signal;
1785
1786 /*
1787 * if signal crosses either of the boundaries, invoke callback
1788 * with appropriate parameters
1789 */
1790 if (sig > ifmgd->rssi_max_thold &&
1791 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1792 ifmgd->last_ave_beacon_signal = sig;
1793 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1794 } else if (sig < ifmgd->rssi_min_thold &&
1795 (last_sig >= ifmgd->rssi_max_thold ||
1796 last_sig == 0)) {
1797 ifmgd->last_ave_beacon_signal = sig;
1798 drv_rssi_callback(local, RSSI_EVENT_LOW);
1799 }
1800 }
1801
17e4ec14 1802 if (bss_conf->cqm_rssi_thold &&
391a200a 1803 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1804 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1805 int sig = ifmgd->ave_beacon_signal / 16;
1806 int last_event = ifmgd->last_cqm_event_signal;
1807 int thold = bss_conf->cqm_rssi_thold;
1808 int hyst = bss_conf->cqm_rssi_hyst;
1809 if (sig < thold &&
1810 (last_event == 0 || sig < last_event - hyst)) {
1811 ifmgd->last_cqm_event_signal = sig;
1812 ieee80211_cqm_rssi_notify(
1813 &sdata->vif,
1814 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1815 GFP_KERNEL);
1816 } else if (sig > thold &&
1817 (last_event == 0 || sig > last_event + hyst)) {
1818 ifmgd->last_cqm_event_signal = sig;
1819 ieee80211_cqm_rssi_notify(
1820 &sdata->vif,
1821 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1822 GFP_KERNEL);
1823 }
1824 }
1825
b291ba11 1826 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1827#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1828 if (net_ratelimit()) {
1829 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1830 "to a received beacon\n", sdata->name);
92778180
JM		 1831 }
1832#endif
b291ba11 1833 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1834 mutex_lock(&local->iflist_mtx);
1835 ieee80211_recalc_ps(local, -1);
1836 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1837 }
1838
b291ba11
JB		 1839 /*
1840 * Push the beacon loss detection into the future since
1841 * we are processing a beacon from the AP just now.
1842 */
d3a910a8 1843 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1844
d91f36db
JB		 1845 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1846 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1847 len - baselen, &elems,
1848 care_about_ies, ncrc);
1849
1850 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1851 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1852 ifmgd->aid);
d91f36db 1853
d8ec4433 1854 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1855 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1856 true);
d91f36db 1857
4ced3f74 1858 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1859 elems.wmm_param_len);
1860 }
fe3fa827 1861
25c9c875 1862 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1863 if (directed_tim) {
572e0012
KV		 1864 if (local->hw.conf.dynamic_ps_timeout > 0) {
1865 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1866 ieee80211_hw_config(local,
1867 IEEE80211_CONF_CHANGE_PS);
1868 ieee80211_send_nullfunc(local, sdata, 0);
1869 } else {
1870 local->pspolling = true;
1871
1872 /*
1873 * Here is assumed that the driver will be
1874 * able to send ps-poll frame and receive a
1875 * response even though power save mode is
1876 * enabled, but some drivers might require
1877 * to disable power save here. This needs
1878 * to be investigated.
1879 */
1880 ieee80211_send_pspoll(local, sdata);
1881 }
a97b77b9
VN		 1882 }
1883 }
7a5158ef 1884
d8ec4433 1885 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1886 return;
1887 ifmgd->beacon_crc = ncrc;
d8ec4433 1888 ifmgd->beacon_crc_valid = true;
30196673 1889
7a5158ef
JB		 1890 if (elems.erp_info && elems.erp_info_len >= 1) {
1891 erp_valid = true;
1892 erp_value = elems.erp_info[0];
1893 } else {
1894 erp_valid = false;
50c4afb9 1895 }
7a5158ef
JB		 1896 changed |= ieee80211_handle_bss_capability(sdata,
1897 le16_to_cpu(mgmt->u.beacon.capab_info),
1898 erp_valid, erp_value);
f0706e82 1899
d3c990fb 1900
53d6f81c 1901 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1902 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1903 struct sta_info *sta;
1904 struct ieee80211_supported_band *sband;
1905 u16 ap_ht_cap_flags;
1906
1907 rcu_read_lock();
1908
abe60632 1909 sta = sta_info_get(sdata, bssid);
77fdaa12 1910 if (WARN_ON(!sta)) {
ae5eb026
JB		 1911 rcu_read_unlock();
1912 return;
1913 }
1914
1915 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1916
1917 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1918 elems.ht_cap_elem, &sta->sta.ht_cap);
1919
1920 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1921
1922 rcu_read_unlock();
1923
693828fe
RM		 1924 /*
1925 * Whenever the AP announces the HT mode change that can be
1926 * 40MHz intolerant or etc., it would be safer to stop tx
1927 * queues before doing hw config to avoid buffer overflow.
1928 */
1929 ieee80211_stop_queues_by_reason(&sdata->local->hw,
1930 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
1931
1932 /* flush out all packets */
1933 synchronize_net();
1934
1935 drv_flush(local, false);
1936
ae5eb026 1937 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1938 bssid, ap_ht_cap_flags);
693828fe
RM		 1939
1940 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1941 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
d3c990fb
RR		 1942 }
1943
8b19e6ca 1944 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1945 if (elems.country_elem) {
a8302de9
VT		 1946 /* TODO: IBSS also needs this */
1947 if (elems.pwr_constr_elem)
1948 ieee80211_handle_pwr_constr(sdata,
1949 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1950 elems.pwr_constr_elem,
1951 elems.pwr_constr_elem_len);
3f2355cb
LR		 1952 }
1953
471b3efd 1954 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1955}
1956
1fa57d01
JB		 1957void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1958 struct sk_buff *skb)
f0706e82 1959{
77fdaa12 1960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1961 struct ieee80211_rx_status *rx_status;
f0706e82 1962 struct ieee80211_mgmt *mgmt;
77fdaa12 1963 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1964 u16 fc;
1965
f0706e82
JB		 1966 rx_status = (struct ieee80211_rx_status *) skb->cb;
1967 mgmt = (struct ieee80211_mgmt *) skb->data;
1968 fc = le16_to_cpu(mgmt->frame_control);
1969
77fdaa12
JB		 1970 mutex_lock(&ifmgd->mtx);
1971
1972 if (ifmgd->associated &&
0c1ad2ca 1973 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1974 switch (fc & IEEE80211_FCTL_STYPE) {
1975 case IEEE80211_STYPE_BEACON:
1976 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1977 rx_status);
1978 break;
1979 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1980 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1981 break;
1982 case IEEE80211_STYPE_DEAUTH:
63f170e0 1983 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1984 break;
1985 case IEEE80211_STYPE_DISASSOC:
1986 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1987 break;
1988 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1989 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1990 case WLAN_CATEGORY_SPECTRUM_MGMT:
1991 ieee80211_sta_process_chanswitch(sdata,
1992 &mgmt->u.action.u.chan_switch.sw_elem,
1993 (void *)ifmgd->associated->priv,
1994 rx_status->mactime);
1995 break;
1996 }
77fdaa12
JB		 1997 }
1998 mutex_unlock(&ifmgd->mtx);
1999
2000 switch (rma) {
2001 case RX_MGMT_NONE:
2002 /* no action */
2003 break;
2004 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2005 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2006 break;
2007 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2008 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2009 break;
2010 default:
2011 WARN(1, "unexpected: %d", rma);
2012 }
36b3a628 2013 return;
77fdaa12
JB		 2014 }
2015
77fdaa12
JB		 2016 mutex_unlock(&ifmgd->mtx);
2017
63f170e0 2018 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 2019 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2020 struct ieee80211_local *local = sdata->local;
2021 struct ieee80211_work *wk;
2022
a1699b75 2023 mutex_lock(&local->mtx);
b054b747
JB		 2024 list_for_each_entry(wk, &local->work_list, list) {
2025 if (wk->sdata != sdata)
2026 continue;
2027
e5b900d2
JB		 2028 if (wk->type != IEEE80211_WORK_ASSOC &&
2029 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 2030 continue;
2031
2032 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2033 continue;
2034 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2035 continue;
2036
2037 /*
2038 * Printing the message only here means we can't
2039 * spuriously print it, but it also means that it
2040 * won't be printed when the frame comes in before
2041 * we even tried to associate or in similar cases.
2042 *
2043 * Ultimately, I suspect cfg80211 should print the
2044 * messages instead.
2045 */
2046 printk(KERN_DEBUG
2047 "%s: deauthenticated from %pM (Reason: %u)\n",
2048 sdata->name, mgmt->bssid,
2049 le16_to_cpu(mgmt->u.deauth.reason_code));
2050
2051 list_del_rcu(&wk->list);
2052 free_work(wk);
2053 break;
2054 }
a1699b75 2055 mutex_unlock(&local->mtx);
f0706e82 2056
ce470613 2057 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2058 }
f0706e82
JB		 2059}
2060
9c6bd790 2061static void ieee80211_sta_timer(unsigned long data)
f0706e82 2062{
60f8b39c
JB		 2063 struct ieee80211_sub_if_data *sdata =
2064 (struct ieee80211_sub_if_data *) data;
46900298 2065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2066 struct ieee80211_local *local = sdata->local;
f0706e82 2067
5bb644a0
JB		 2068 if (local->quiescing) {
2069 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2070 return;
2071 }
2072
64592c8f 2073 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2074}
2075
04ac3c0e 2076static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2077 u8 *bssid, u8 reason)
04ac3c0e
FF		 2078{
2079 struct ieee80211_local *local = sdata->local;
2080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2081
2082 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2083 IEEE80211_STA_BEACON_POLL);
2084
2085 ieee80211_set_disassoc(sdata, true, true);
2086 mutex_unlock(&ifmgd->mtx);
2087 mutex_lock(&local->mtx);
2088 ieee80211_recalc_idle(local);
2089 mutex_unlock(&local->mtx);
2090 /*
2091 * must be outside lock due to cfg80211,
2092 * but that's not a problem.
2093 */
2094 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2095 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e
FF		 2096 NULL, true);
2097 mutex_lock(&ifmgd->mtx);
2098}
2099
1fa57d01 2100void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2101{
9c6bd790 2102 struct ieee80211_local *local = sdata->local;
1fa57d01 2103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2104
77fdaa12
JB		 2105 /* then process the rest of the work */
2106 mutex_lock(&ifmgd->mtx);
2107
b291ba11
JB		 2108 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2109 IEEE80211_STA_CONNECTION_POLL) &&
2110 ifmgd->associated) {
a43abf29 2111 u8 bssid[ETH_ALEN];
72a8a3ed 2112 int max_tries;
a43abf29 2113
0c1ad2ca 2114 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2115
72a8a3ed 2116 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2117 max_tries = max_nullfunc_tries;
72a8a3ed 2118 else
180205bd 2119 max_tries = max_probe_tries;
72a8a3ed 2120
4e5ff376
FF		 2121 /* ACK received for nullfunc probing frame */
2122 if (!ifmgd->probe_send_count)
2123 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2124 else if (ifmgd->nullfunc_failed) {
2125 if (ifmgd->probe_send_count < max_tries) {
2126#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2127 wiphy_debug(local->hw.wiphy,
2128 "%s: No ack for nullfunc frame to"
bfc31df3 2129 " AP %pM, try %d/%i\n",
04ac3c0e 2130 sdata->name, bssid,
bfc31df3 2131 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2132#endif
2133 ieee80211_mgd_probe_ap_send(sdata);
2134 } else {
2135#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2136 wiphy_debug(local->hw.wiphy,
2137 "%s: No ack for nullfunc frame to"
2138 " AP %pM, disconnecting.\n",
c658e5db 2139 sdata->name, bssid);
04ac3c0e 2140#endif
95acac61
JB		 2141 ieee80211_sta_connection_lost(sdata, bssid,
2142 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2143 }
2144 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2145 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2146 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2147#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2148 wiphy_debug(local->hw.wiphy,
2149 "%s: Failed to send nullfunc to AP %pM"
2150 " after %dms, disconnecting.\n",
2151 sdata->name,
180205bd 2152 bssid, probe_wait_ms);
04ac3c0e 2153#endif
95acac61
JB		 2154 ieee80211_sta_connection_lost(sdata, bssid,
2155 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2156 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2157#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2158 wiphy_debug(local->hw.wiphy,
2159 "%s: No probe response from AP %pM"
bfc31df3 2160 " after %dms, try %d/%i\n",
b38afa87 2161 sdata->name,
180205bd 2162 bssid, probe_wait_ms,
bfc31df3 2163 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2164#endif
2165 ieee80211_mgd_probe_ap_send(sdata);
2166 } else {
b291ba11
JB		 2167 /*
2168 * We actually lost the connection ... or did we?
2169 * Let's make sure!
2170 */
b38afa87
BG		 2171 wiphy_debug(local->hw.wiphy,
2172 "%s: No probe response from AP %pM"
2173 " after %dms, disconnecting.\n",
2174 sdata->name,
180205bd 2175 bssid, probe_wait_ms);
04ac3c0e 2176
95acac61
JB		 2177 ieee80211_sta_connection_lost(sdata, bssid,
2178 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2179 }
2180 }
2181
77fdaa12 2182 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2183}
2184
b291ba11
JB		 2185static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2186{
2187 struct ieee80211_sub_if_data *sdata =
2188 (struct ieee80211_sub_if_data *) data;
2189 struct ieee80211_local *local = sdata->local;
2190
2191 if (local->quiescing)
2192 return;
2193
1e4dcd01
JO		 2194 ieee80211_queue_work(&sdata->local->hw,
2195 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2196}
2197
2198static void ieee80211_sta_conn_mon_timer(unsigned long data)
2199{
2200 struct ieee80211_sub_if_data *sdata =
2201 (struct ieee80211_sub_if_data *) data;
2202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2203 struct ieee80211_local *local = sdata->local;
2204
2205 if (local->quiescing)
2206 return;
2207
42935eca 2208 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2209}
2210
2211static void ieee80211_sta_monitor_work(struct work_struct *work)
2212{
2213 struct ieee80211_sub_if_data *sdata =
2214 container_of(work, struct ieee80211_sub_if_data,
2215 u.mgd.monitor_work);
2216
2217 ieee80211_mgd_probe_ap(sdata, false);
2218}
2219
9c6bd790
JB		 2220static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2221{
ad935687 2222 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2223 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2224 IEEE80211_STA_CONNECTION_POLL);
ad935687 2225
b291ba11 2226 /* let's probe the connection once */
42935eca 2227 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2228 &sdata->u.mgd.monitor_work);
2229 /* and do all the other regular work too */
64592c8f 2230 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2231 }
9c6bd790 2232}
f0706e82 2233
5bb644a0
JB		 2234#ifdef CONFIG_PM
2235void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2236{
2237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2238
2239 /*
2240 * we need to use atomic bitops for the running bits
2241 * only because both timers might fire at the same
2242 * time -- the code here is properly synchronised.
2243 */
2244
d1f5b7a3
JB		 2245 cancel_work_sync(&ifmgd->request_smps_work);
2246
1e4dcd01 2247 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2248 if (del_timer_sync(&ifmgd->timer))
2249 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2250
2251 cancel_work_sync(&ifmgd->chswitch_work);
2252 if (del_timer_sync(&ifmgd->chswitch_timer))
2253 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2254
2255 cancel_work_sync(&ifmgd->monitor_work);
2256 /* these will just be re-established on connection */
2257 del_timer_sync(&ifmgd->conn_mon_timer);
2258 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2259}
2260
2261void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2262{
2263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2264
676b58c2
RM		 2265 if (!ifmgd->associated)
2266 return;
2267
95acac61
JB		 2268 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2269 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2270 mutex_lock(&ifmgd->mtx);
2271 if (ifmgd->associated) {
2272#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2273 wiphy_debug(sdata->local->hw.wiphy,
2274 "%s: driver requested disconnect after resume.\n",
2275 sdata->name);
2276#endif
2277 ieee80211_sta_connection_lost(sdata,
2278 ifmgd->associated->bssid,
2279 WLAN_REASON_UNSPECIFIED);
2280 mutex_unlock(&ifmgd->mtx);
2281 return;
2282 }
2283 mutex_unlock(&ifmgd->mtx);
2284 }
2285
5bb644a0
JB		 2286 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2287 add_timer(&ifmgd->timer);
2288 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2289 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2290 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2291 ieee80211_restart_sta_timer(sdata);
a6af1d84 2292 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 2293}
2294#endif
2295
9c6bd790
JB		 2296/* interface setup */
2297void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2298{
46900298 2299 struct ieee80211_if_managed *ifmgd;
988c0f72 2300
46900298 2301 ifmgd = &sdata->u.mgd;
b291ba11 2302 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2303 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2304 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2305 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2306 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2307 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2308 (unsigned long) sdata);
b291ba11
JB		 2309 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2310 (unsigned long) sdata);
2311 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2312 (unsigned long) sdata);
46900298 2313 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2314 (unsigned long) sdata);
9c6bd790 2315
ab1faead 2316 ifmgd->flags = 0;
bbbdff9e 2317
77fdaa12 2318 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2319
2320 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2321 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2322 else
2323 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2324}
2325
77fdaa12
JB		 2326/* scan finished notification */
2327void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2328{
77fdaa12 2329 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2330
77fdaa12
JB		 2331 /* Restart STA timers */
2332 rcu_read_lock();
2333 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2334 ieee80211_restart_sta_timer(sdata);
2335 rcu_read_unlock();
2336}
60f8b39c 2337
77fdaa12
JB		 2338int ieee80211_max_network_latency(struct notifier_block *nb,
2339 unsigned long data, void *dummy)
2340{
2341 s32 latency_usec = (s32) data;
2342 struct ieee80211_local *local =
2343 container_of(nb, struct ieee80211_local,
2344 network_latency_notifier);
1fa6f4af 2345
77fdaa12
JB		 2346 mutex_lock(&local->iflist_mtx);
2347 ieee80211_recalc_ps(local, latency_usec);
2348 mutex_unlock(&local->iflist_mtx);
dfe67012 2349
77fdaa12 2350 return 0;
9c6bd790
JB		 2351}
2352
77fdaa12 2353/* config hooks */
af6b6374
JB		 2354static enum work_done_result
2355ieee80211_probe_auth_done(struct ieee80211_work *wk,
2356 struct sk_buff *skb)
2357{
b2abb6e2
JB		 2358 struct ieee80211_local *local = wk->sdata->local;
2359
af6b6374
JB		 2360 if (!skb) {
2361 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2362 goto destroy;
af6b6374
JB		 2363 }
2364
2365 if (wk->type == IEEE80211_WORK_AUTH) {
2366 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
b2abb6e2 2367 goto destroy;
af6b6374
JB		 2368 }
2369
2370 mutex_lock(&wk->sdata->u.mgd.mtx);
2371 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2372 mutex_unlock(&wk->sdata->u.mgd.mtx);
2373
2374 wk->type = IEEE80211_WORK_AUTH;
2375 wk->probe_auth.tries = 0;
2376 return WORK_DONE_REQUEUE;
b2abb6e2
JB		 2377 destroy:
2378 if (wk->probe_auth.synced)
2379 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2380 IEEE80211_TX_SYNC_AUTH);
2381
2382 return WORK_DONE_DESTROY;
af6b6374
JB		 2383}
2384
77fdaa12
JB		 2385int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2386 struct cfg80211_auth_request *req)
9c6bd790 2387{
77fdaa12 2388 const u8 *ssid;
f679f65d 2389 struct ieee80211_work *wk;
77fdaa12 2390 u16 auth_alg;
9c6bd790 2391
d5cdfacb
JM		 2392 if (req->local_state_change)
2393 return 0; /* no need to update mac80211 state */
2394
77fdaa12
JB		 2395 switch (req->auth_type) {
2396 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2397 auth_alg = WLAN_AUTH_OPEN;
2398 break;
2399 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2400 if (IS_ERR(sdata->local->wep_tx_tfm))
2401 return -EOPNOTSUPP;
77fdaa12
JB		 2402 auth_alg = WLAN_AUTH_SHARED_KEY;
2403 break;
2404 case NL80211_AUTHTYPE_FT:
2405 auth_alg = WLAN_AUTH_FT;
2406 break;
2407 case NL80211_AUTHTYPE_NETWORK_EAP:
2408 auth_alg = WLAN_AUTH_LEAP;
2409 break;
2410 default:
2411 return -EOPNOTSUPP;
60f8b39c 2412 }
77fdaa12
JB		 2413
2414 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2415 if (!wk)
9c6bd790 2416 return -ENOMEM;
77fdaa12 2417
5e124bd5 2418 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2419
2420 if (req->ie && req->ie_len) {
2421 memcpy(wk->ie, req->ie, req->ie_len);
2422 wk->ie_len = req->ie_len;
9c6bd790 2423 }
77fdaa12 2424
fffd0934 2425 if (req->key && req->key_len) {
af6b6374
JB		 2426 wk->probe_auth.key_len = req->key_len;
2427 wk->probe_auth.key_idx = req->key_idx;
2428 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2429 }
2430
77fdaa12 2431 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2432 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2433 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2434
af6b6374
JB		 2435 wk->probe_auth.algorithm = auth_alg;
2436 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2437
070bb547
JB		 2438 /* if we already have a probe, don't probe again */
2439 if (req->bss->proberesp_ies)
2440 wk->type = IEEE80211_WORK_AUTH;
2441 else
2442 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2443 wk->chan = req->bss->channel;
4d51e149 2444 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2445 wk->sdata = sdata;
2446 wk->done = ieee80211_probe_auth_done;
77fdaa12 2447
af6b6374 2448 ieee80211_add_work(wk);
9c6bd790 2449 return 0;
60f8b39c
JB		 2450}
2451
2a33bee2
GE		 2452/* create and insert a dummy station entry */
2453static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2454 u8 *bssid) {
2455 struct sta_info *sta;
2456 int err;
2457
2458 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
d15b8459 2459 if (!sta)
2a33bee2 2460 return -ENOMEM;
2a33bee2
GE		 2461
2462 sta->dummy = true;
2463
2464 err = sta_info_insert(sta);
2465 sta = NULL;
2466 if (err) {
2467 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2468 " the AP (error %d)\n", sdata->name, err);
2469 return err;
2470 }
2471
2472 return 0;
2473}
2474
af6b6374
JB		 2475static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2476 struct sk_buff *skb)
2477{
b2abb6e2 2478 struct ieee80211_local *local = wk->sdata->local;
af6b6374 2479 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2480 struct ieee80211_rx_status *rx_status;
2481 struct ieee802_11_elems elems;
2a33bee2 2482 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374
JB		 2483 u16 status;
2484
2485 if (!skb) {
2a33bee2 2486 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374 2487 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2488 goto destroy;
af6b6374
JB		 2489 }
2490
e5b900d2
JB		 2491 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2492 mutex_lock(&wk->sdata->u.mgd.mtx);
2493 rx_status = (void *) skb->cb;
2494 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2495 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2496 &elems, true);
2497 mutex_unlock(&wk->sdata->u.mgd.mtx);
2498
2499 wk->type = IEEE80211_WORK_ASSOC;
2500 /* not really done yet */
2501 return WORK_DONE_REQUEUE;
2502 }
2503
af6b6374
JB		 2504 mgmt = (void *)skb->data;
2505 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2506
2507 if (status == WLAN_STATUS_SUCCESS) {
b2abb6e2
JB		 2508 if (wk->assoc.synced)
2509 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2510 IEEE80211_TX_SYNC_ASSOC);
2511
af6b6374
JB		 2512 mutex_lock(&wk->sdata->u.mgd.mtx);
2513 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2514 mutex_unlock(&wk->sdata->u.mgd.mtx);
2515 /* oops -- internal error -- send timeout for now */
2a33bee2 2516 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2517 cfg80211_send_assoc_timeout(wk->sdata->dev,
2518 wk->filter_ta);
2519 return WORK_DONE_DESTROY;
2520 }
68542962
JO		 2521
2522 mutex_unlock(&wk->sdata->u.mgd.mtx);
2a33bee2
GE		 2523 } else {
2524 /* assoc failed - destroy the dummy station entry */
2525 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2526 }
2527
2528 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
b2abb6e2
JB		 2529 destroy:
2530 if (wk->assoc.synced)
2531 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2532 IEEE80211_TX_SYNC_ASSOC);
2533
af6b6374
JB		 2534 return WORK_DONE_DESTROY;
2535}
2536
77fdaa12
JB		 2537int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2538 struct cfg80211_assoc_request *req)
f0706e82 2539{
77fdaa12 2540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2541 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2542 struct ieee80211_work *wk;
63f170e0 2543 const u8 *ssid;
2a33bee2 2544 int i, err;
f0706e82 2545
77fdaa12 2546 mutex_lock(&ifmgd->mtx);
af6b6374 2547 if (ifmgd->associated) {
9c87ba67
JM		 2548 if (!req->prev_bssid ||
2549 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2550 ETH_ALEN)) {
2551 /*
2552 * We are already associated and the request was not a
2553 * reassociation request from the current BSS, so
2554 * reject it.
2555 */
2556 mutex_unlock(&ifmgd->mtx);
2557 return -EALREADY;
2558 }
2559
2560 /* Trying to reassociate - clear previous association state */
53f73c09 2561 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2562 }
2563 mutex_unlock(&ifmgd->mtx);
77fdaa12 2564
63f170e0 2565 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2566 if (!wk)
2567 return -ENOMEM;
77fdaa12 2568
2a33bee2
GE		 2569 /*
2570 * create a dummy station info entry in order
2571 * to start accepting incoming EAPOL packets from the station
2572 */
2573 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2574 if (err) {
2575 kfree(wk);
2576 return err;
2577 }
2578
77fdaa12 2579 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2580 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2581
d8ec4433
JO		 2582 ifmgd->beacon_crc_valid = false;
2583
77fdaa12
JB		 2584 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2585 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2586 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2587 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2588 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2589
77fdaa12
JB		 2590
2591 if (req->ie && req->ie_len) {
2592 memcpy(wk->ie, req->ie, req->ie_len);
2593 wk->ie_len = req->ie_len;
2594 } else
2595 wk->ie_len = 0;
2596
0c1ad2ca 2597 wk->assoc.bss = req->bss;
f679f65d 2598
af6b6374 2599 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2600
af6b6374
JB		 2601 /* new association always uses requested smps mode */
2602 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2603 if (ifmgd->powersave)
2604 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2605 else
2606 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2607 } else
2608 ifmgd->ap_smps = ifmgd->req_smps;
2609
2610 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2611 /*
2612 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2613 * We still associate in non-HT mode (11a/b/g) if any one of these
2614 * ciphers is configured as pairwise.
2615 * We can set this to true for non-11n hardware, that'll be checked
2616 * separately along with the peer capabilities.
2617 */
af6b6374 2618 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2619 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2620 wk->assoc.wmm_used = bss->wmm_used;
2621 wk->assoc.supp_rates = bss->supp_rates;
2622 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2623 wk->assoc.ht_information_ie =
2624 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2625
ab13315a
KV		 2626 if (bss->wmm_used && bss->uapsd_supported &&
2627 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2628 wk->assoc.uapsd_used = true;
2629 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2630 } else {
2631 wk->assoc.uapsd_used = false;
2632 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2633 }
2634
63f170e0 2635 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2636 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2637 wk->assoc.ssid_len = ssid[1];
63f170e0 2638
77fdaa12 2639 if (req->prev_bssid)
f679f65d 2640 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2641
f679f65d 2642 wk->chan = req->bss->channel;
4d51e149 2643 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2644 wk->sdata = sdata;
2645 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2646 if (!bss->dtim_period &&
2647 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2648 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2649 else
2650 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2651
2652 if (req->use_mfp) {
2653 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2654 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2655 } else {
2656 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2657 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2658 }
2659
2660 if (req->crypto.control_port)
2661 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2662 else
2663 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2664
a621fa4d
JB		 2665 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2666 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2667
af6b6374
JB		 2668 ieee80211_add_work(wk);
2669 return 0;
f0706e82
JB		 2670}
2671
77fdaa12 2672int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2673 struct cfg80211_deauth_request *req,
2674 void *cookie)
f0706e82 2675{
af6b6374 2676 struct ieee80211_local *local = sdata->local;
46900298 2677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2678 struct ieee80211_work *wk;
05e48e8e
JM		 2679 u8 bssid[ETH_ALEN];
2680 bool assoc_bss = false;
f0706e82 2681
77fdaa12
JB		 2682 mutex_lock(&ifmgd->mtx);
2683
05e48e8e 2684 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2685 if (ifmgd->associated == req->bss) {
53f73c09 2686 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2687 mutex_unlock(&ifmgd->mtx);
05e48e8e 2688 assoc_bss = true;
af6b6374
JB		 2689 } else {
2690 bool not_auth_yet = false;
f0706e82 2691
a58ce43f 2692 mutex_unlock(&ifmgd->mtx);
a58ce43f 2693
a1699b75 2694 mutex_lock(&local->mtx);
af6b6374 2695 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2696 if (wk->sdata != sdata)
af6b6374 2697 continue;
29165e4c
JB		 2698
2699 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2700 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2701 wk->type != IEEE80211_WORK_ASSOC &&
2702 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2703 continue;
2704
af6b6374
JB		 2705 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2706 continue;
29165e4c
JB		 2707
2708 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2709 list_del_rcu(&wk->list);
af6b6374
JB		 2710 free_work(wk);
2711 break;
2712 }
a1699b75 2713 mutex_unlock(&local->mtx);
af6b6374
JB		 2714
2715 /*
2716 * If somebody requests authentication and we haven't
2717 * sent out an auth frame yet there's no need to send
2718 * out a deauth frame either. If the state was PROBE,
2719 * then this is the case. If it's AUTH we have sent a
2720 * frame, and if it's IDLE we have completed the auth
2721 * process already.
2722 */
2723 if (not_auth_yet) {
2724 __cfg80211_auth_canceled(sdata->dev, bssid);
2725 return 0;
2726 }
2727 }
77fdaa12 2728
0ff71613 2729 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2730 sdata->name, bssid, req->reason_code);
0ff71613 2731
d5cdfacb
JM		 2732 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2733 req->reason_code, cookie,
2734 !req->local_state_change);
05e48e8e
JM		 2735 if (assoc_bss)
2736 sta_info_destroy_addr(sdata, bssid);
f0706e82 2737
7da7cc1d 2738 mutex_lock(&sdata->local->mtx);
bc83b681 2739 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2740 mutex_unlock(&sdata->local->mtx);
bc83b681 2741
f0706e82
JB		 2742 return 0;
2743}
84363e6e 2744
77fdaa12 2745int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2746 struct cfg80211_disassoc_request *req,
2747 void *cookie)
9c6bd790 2748{
77fdaa12 2749 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2750 u8 bssid[ETH_ALEN];
9c6bd790 2751
77fdaa12 2752 mutex_lock(&ifmgd->mtx);
10f644a4 2753
8d8b261a
JB		 2754 /*
2755 * cfg80211 should catch this ... but it's racy since
2756 * we can receive a disassoc frame, process it, hand it
2757 * to cfg80211 while that's in a locked section already
2758 * trying to tell us that the user wants to disconnect.
2759 */
0c1ad2ca 2760 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2761 mutex_unlock(&ifmgd->mtx);
2762 return -ENOLINK;
2763 }
2764
0ff71613 2765 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2766 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2767
e69e95db 2768 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2769 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2770
2771 mutex_unlock(&ifmgd->mtx);
10f644a4 2772
77fdaa12 2773 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2774 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2775 cookie, !req->local_state_change);
e69e95db 2776 sta_info_destroy_addr(sdata, bssid);
bc83b681 2777
7da7cc1d 2778 mutex_lock(&sdata->local->mtx);
bc83b681 2779 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2780 mutex_unlock(&sdata->local->mtx);
bc83b681 2781
10f644a4
JB		 2782 return 0;
2783}
026331c4 2784
a97c13c3
JO		 2785void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2786 enum nl80211_cqm_rssi_threshold_event rssi_event,
2787 gfp_t gfp)
2788{
2789 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2790
b5878a2d
JB		 2791 trace_api_cqm_rssi_notify(sdata, rssi_event);
2792
a97c13c3
JO		 2793 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2794}
2795EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 2796
2797unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2798{
2799 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2800 return sdata->dev->operstate;
2801}
2802EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
This page took 0.667789 seconds and 5 git commands to generate.