2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
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 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 Intel Deutschland GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/pm_qos.h>
24 #include <linux/crc32.h>
25 #include <linux/slab.h>
26 #include <linux/export.h>
27 #include <net/mac80211.h>
28 #include <asm/unaligned.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
45 static int max_nullfunc_tries
= 2;
46 module_param(max_nullfunc_tries
, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries
,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
50 static int max_probe_tries
= 5;
51 module_param(max_probe_tries
, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries
,
53 "Maximum probe tries before disconnecting (reason 4).");
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
63 static int beacon_loss_count
= 7;
64 module_param(beacon_loss_count
, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count
,
66 "Number of beacon intervals before we decide beacon was lost.");
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
78 static int probe_wait_ms
= 500;
79 module_param(probe_wait_ms
, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms
,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
85 * Weight given to the latest Beacon frame when calculating average signal
86 * strength for Beacon frames received in the current BSS. This must be
89 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
92 * How many Beacon frames need to have been used in average signal strength
93 * before starting to indicate signal change events.
95 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
98 * We can have multiple work items (and connection probing)
99 * scheduling this timer, but we need to take care to only
100 * reschedule it when it should fire _earlier_ than it was
101 * asked for before, or if it's not pending right now. This
102 * function ensures that. Note that it then is required to
103 * run this function for all timeouts after the first one
104 * has happened -- the work that runs from this timer will
107 static void run_again(struct ieee80211_sub_if_data
*sdata
,
108 unsigned long timeout
)
110 sdata_assert_lock(sdata
);
112 if (!timer_pending(&sdata
->u
.mgd
.timer
) ||
113 time_before(timeout
, sdata
->u
.mgd
.timer
.expires
))
114 mod_timer(&sdata
->u
.mgd
.timer
, timeout
);
117 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
119 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
122 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
125 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
126 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
129 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
131 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
133 if (unlikely(!sdata
->u
.mgd
.associated
))
136 ifmgd
->probe_send_count
= 0;
138 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
141 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
142 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
145 static int ecw2cw(int ecw
)
147 return (1 << ecw
) - 1;
151 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
152 struct ieee80211_supported_band
*sband
,
153 struct ieee80211_channel
*channel
,
154 const struct ieee80211_ht_cap
*ht_cap
,
155 const struct ieee80211_ht_operation
*ht_oper
,
156 const struct ieee80211_vht_operation
*vht_oper
,
157 struct cfg80211_chan_def
*chandef
, bool tracking
)
159 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
160 struct cfg80211_chan_def vht_chandef
;
161 struct ieee80211_sta_ht_cap sta_ht_cap
;
164 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
165 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
167 chandef
->chan
= channel
;
168 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
169 chandef
->center_freq1
= channel
->center_freq
;
170 chandef
->center_freq2
= 0;
172 if (!ht_cap
|| !ht_oper
|| !sta_ht_cap
.ht_supported
) {
173 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
177 chandef
->width
= NL80211_CHAN_WIDTH_20
;
179 if (!(ht_cap
->cap_info
&
180 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
))) {
181 ret
= IEEE80211_STA_DISABLE_40MHZ
;
182 vht_chandef
= *chandef
;
186 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
188 /* check that channel matches the right operating channel */
189 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
191 * It's possible that some APs are confused here;
192 * Netgear WNDR3700 sometimes reports 4 higher than
193 * the actual channel in association responses, but
194 * since we look at probe response/beacon data here
198 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
199 channel
->center_freq
, ht_cfreq
,
200 ht_oper
->primary_chan
, channel
->band
);
201 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
205 /* check 40 MHz support, if we have it */
206 if (sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
207 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
208 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
209 chandef
->width
= NL80211_CHAN_WIDTH_40
;
210 chandef
->center_freq1
+= 10;
212 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
213 chandef
->width
= NL80211_CHAN_WIDTH_40
;
214 chandef
->center_freq1
-= 10;
218 /* 40 MHz (and 80 MHz) must be supported for VHT */
219 ret
= IEEE80211_STA_DISABLE_VHT
;
220 /* also mark 40 MHz disabled */
221 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
225 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
226 ret
= IEEE80211_STA_DISABLE_VHT
;
230 vht_chandef
.chan
= channel
;
231 vht_chandef
.center_freq1
=
232 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
234 vht_chandef
.center_freq2
= 0;
236 switch (vht_oper
->chan_width
) {
237 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
238 vht_chandef
.width
= chandef
->width
;
239 vht_chandef
.center_freq1
= chandef
->center_freq1
;
241 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
242 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
244 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
245 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
247 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
248 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
249 vht_chandef
.center_freq2
=
250 ieee80211_channel_to_frequency(
251 vht_oper
->center_freq_seg2_idx
,
255 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
257 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
258 vht_oper
->chan_width
);
259 ret
= IEEE80211_STA_DISABLE_VHT
;
263 if (!cfg80211_chandef_valid(&vht_chandef
)) {
264 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
266 "AP VHT information is invalid, disable VHT\n");
267 ret
= IEEE80211_STA_DISABLE_VHT
;
271 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
276 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
277 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
279 "AP VHT information doesn't match HT, disable VHT\n");
280 ret
= IEEE80211_STA_DISABLE_VHT
;
284 *chandef
= vht_chandef
;
290 * When tracking the current AP, don't do any further checks if the
291 * new chandef is identical to the one we're currently using for the
292 * connection. This keeps us from playing ping-pong with regulatory,
293 * without it the following can happen (for example):
294 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
295 * - AP advertises regdom US
296 * - CRDA loads regdom US with 80 MHz prohibited (old database)
297 * - the code below detects an unsupported channel, downgrades, and
298 * we disconnect from the AP in the caller
299 * - disconnect causes CRDA to reload world regdomain and the game
301 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
303 * It seems possible that there are still scenarios with CSA or real
304 * bandwidth changes where a this could happen, but those cases are
305 * less common and wouldn't completely prevent using the AP.
308 cfg80211_chandef_identical(chandef
, &sdata
->vif
.bss_conf
.chandef
))
311 /* don't print the message below for VHT mismatch if VHT is disabled */
312 if (ret
& IEEE80211_STA_DISABLE_VHT
)
313 vht_chandef
= *chandef
;
316 * Ignore the DISABLED flag when we're already connected and only
317 * tracking the APs beacon for bandwidth changes - otherwise we
318 * might get disconnected here if we connect to an AP, update our
319 * regulatory information based on the AP's country IE and the
320 * information we have is wrong/outdated and disables the channel
321 * that we're actually using for the connection to the AP.
323 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
325 IEEE80211_CHAN_DISABLED
)) {
326 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
327 ret
= IEEE80211_STA_DISABLE_HT
|
328 IEEE80211_STA_DISABLE_VHT
;
332 ret
|= ieee80211_chandef_downgrade(chandef
);
335 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
337 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
339 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
343 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
344 struct sta_info
*sta
,
345 const struct ieee80211_ht_cap
*ht_cap
,
346 const struct ieee80211_ht_operation
*ht_oper
,
347 const struct ieee80211_vht_operation
*vht_oper
,
348 const u8
*bssid
, u32
*changed
)
350 struct ieee80211_local
*local
= sdata
->local
;
351 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
352 struct ieee80211_supported_band
*sband
;
353 struct ieee80211_channel
*chan
;
354 struct cfg80211_chan_def chandef
;
357 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
360 /* if HT was/is disabled, don't track any bandwidth changes */
361 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
364 /* don't check VHT if we associated as non-VHT station */
365 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
368 if (WARN_ON_ONCE(!sta
))
372 * if bss configuration changed store the new one -
373 * this may be applicable even if channel is identical
375 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
376 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
377 *changed
|= BSS_CHANGED_HT
;
378 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
381 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
382 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
384 /* calculate new channel (type) based on HT/VHT operation IEs */
385 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
,
386 ht_cap
, ht_oper
, vht_oper
,
390 * Downgrade the new channel if we associated with restricted
391 * capabilities. For example, if we associated as a 20 MHz STA
392 * to a 40 MHz AP (due to regulatory, capabilities or config
393 * reasons) then switching to a 40 MHz channel now won't do us
394 * any good -- we couldn't use it with the AP.
396 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
397 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
398 flags
|= ieee80211_chandef_downgrade(&chandef
);
399 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
400 chandef
.width
== NL80211_CHAN_WIDTH_160
)
401 flags
|= ieee80211_chandef_downgrade(&chandef
);
402 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
403 chandef
.width
> NL80211_CHAN_WIDTH_20
)
404 flags
|= ieee80211_chandef_downgrade(&chandef
);
406 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
410 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
411 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
412 chandef
.center_freq1
, chandef
.center_freq2
);
414 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
415 IEEE80211_STA_DISABLE_VHT
|
416 IEEE80211_STA_DISABLE_40MHZ
|
417 IEEE80211_STA_DISABLE_80P80MHZ
|
418 IEEE80211_STA_DISABLE_160MHZ
)) ||
419 !cfg80211_chandef_valid(&chandef
)) {
421 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
426 switch (chandef
.width
) {
427 case NL80211_CHAN_WIDTH_20_NOHT
:
428 case NL80211_CHAN_WIDTH_20
:
429 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
431 case NL80211_CHAN_WIDTH_40
:
432 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
434 case NL80211_CHAN_WIDTH_80
:
435 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
437 case NL80211_CHAN_WIDTH_80P80
:
438 case NL80211_CHAN_WIDTH_160
:
439 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
445 if (new_sta_bw
> sta
->cur_max_bandwidth
)
446 new_sta_bw
= sta
->cur_max_bandwidth
;
448 if (new_sta_bw
< sta
->sta
.bandwidth
) {
449 sta
->sta
.bandwidth
= new_sta_bw
;
450 rate_control_rate_update(local
, sband
, sta
,
451 IEEE80211_RC_BW_CHANGED
);
454 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
457 "AP %pM changed bandwidth to incompatible one - disconnect\n",
462 if (new_sta_bw
> sta
->sta
.bandwidth
) {
463 sta
->sta
.bandwidth
= new_sta_bw
;
464 rate_control_rate_update(local
, sband
, sta
,
465 IEEE80211_RC_BW_CHANGED
);
471 /* frame sending functions */
473 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
474 struct sk_buff
*skb
, u8 ap_ht_param
,
475 struct ieee80211_supported_band
*sband
,
476 struct ieee80211_channel
*channel
,
477 enum ieee80211_smps_mode smps
)
480 u32 flags
= channel
->flags
;
482 struct ieee80211_sta_ht_cap ht_cap
;
484 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
486 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
487 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
489 /* determine capability flags */
492 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
493 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
494 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
495 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
496 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
499 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
500 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
501 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
502 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
508 * If 40 MHz was disabled associate as though we weren't
509 * capable of 40 MHz -- some broken APs will never fall
510 * back to trying to transmit in 20 MHz.
512 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
513 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
514 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
517 /* set SM PS mode properly */
518 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
520 case IEEE80211_SMPS_AUTOMATIC
:
521 case IEEE80211_SMPS_NUM_MODES
:
523 case IEEE80211_SMPS_OFF
:
524 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
525 IEEE80211_HT_CAP_SM_PS_SHIFT
;
527 case IEEE80211_SMPS_STATIC
:
528 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
529 IEEE80211_HT_CAP_SM_PS_SHIFT
;
531 case IEEE80211_SMPS_DYNAMIC
:
532 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
533 IEEE80211_HT_CAP_SM_PS_SHIFT
;
537 /* reserve and fill IE */
538 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
539 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
542 /* This function determines vht capability flags for the association
544 * Note - the function may set the owner of the MU-MIMO capability
546 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
548 struct ieee80211_supported_band
*sband
,
549 struct ieee80211_vht_cap
*ap_vht_cap
)
551 struct ieee80211_local
*local
= sdata
->local
;
554 struct ieee80211_sta_vht_cap vht_cap
;
555 u32 mask
, ap_bf_sts
, our_bf_sts
;
557 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
559 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
560 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
562 /* determine capability flags */
565 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
566 u32 bw
= cap
& IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
568 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
569 if (bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
||
570 bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
)
571 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
574 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
575 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
576 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
580 * Some APs apparently get confused if our capabilities are better
581 * than theirs, so restrict what we advertise in the assoc request.
583 if (!(ap_vht_cap
->vht_cap_info
&
584 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
585 cap
&= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
586 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
);
587 else if (!(ap_vht_cap
->vht_cap_info
&
588 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE
)))
589 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
592 * If some other vif is using the MU-MIMO capablity we cannot associate
593 * using MU-MIMO - this will lead to contradictions in the group-id
595 * Ownership is defined since association request, in order to avoid
596 * simultaneous associations with MU-MIMO.
598 if (cap
& IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
) {
599 bool disable_mu_mimo
= false;
600 struct ieee80211_sub_if_data
*other
;
602 list_for_each_entry_rcu(other
, &local
->interfaces
, list
) {
603 if (other
->flags
& IEEE80211_SDATA_MU_MIMO_OWNER
) {
604 disable_mu_mimo
= true;
609 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
611 sdata
->flags
|= IEEE80211_SDATA_MU_MIMO_OWNER
;
614 mask
= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK
;
616 ap_bf_sts
= le32_to_cpu(ap_vht_cap
->vht_cap_info
) & mask
;
617 our_bf_sts
= cap
& mask
;
619 if (ap_bf_sts
< our_bf_sts
) {
624 /* reserve and fill IE */
625 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
626 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
629 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
631 struct ieee80211_local
*local
= sdata
->local
;
632 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
633 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
635 struct ieee80211_mgmt
*mgmt
;
637 size_t offset
= 0, noffset
;
638 int i
, count
, rates_len
, supp_rates_len
, shift
;
640 struct ieee80211_supported_band
*sband
;
641 struct ieee80211_chanctx_conf
*chanctx_conf
;
642 struct ieee80211_channel
*chan
;
643 u32 rate_flags
, rates
= 0;
645 sdata_assert_lock(sdata
);
648 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
649 if (WARN_ON(!chanctx_conf
)) {
653 chan
= chanctx_conf
->def
.chan
;
654 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
656 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
657 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
659 if (assoc_data
->supp_rates_len
) {
661 * Get all rates supported by the device and the AP as
662 * some APs don't like getting a superset of their rates
663 * in the association request (e.g. D-Link DAP 1353 in
666 rates_len
= ieee80211_parse_bitrates(&chanctx_conf
->def
, sband
,
667 assoc_data
->supp_rates
,
668 assoc_data
->supp_rates_len
,
672 * In case AP not provide any supported rates information
673 * before association, we send information element(s) with
674 * all rates that we support.
677 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
678 if ((rate_flags
& sband
->bitrates
[i
].flags
)
686 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
687 sizeof(*mgmt
) + /* bit too much but doesn't matter */
688 2 + assoc_data
->ssid_len
+ /* SSID */
689 4 + rates_len
+ /* (extended) rates */
690 4 + /* power capability */
691 2 + 2 * sband
->n_channels
+ /* supported channels */
692 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
693 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
694 assoc_data
->ie_len
+ /* extra IEs */
700 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
702 capab
= WLAN_CAPABILITY_ESS
;
704 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
705 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
706 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
709 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
710 capab
|= WLAN_CAPABILITY_PRIVACY
;
712 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
713 ieee80211_hw_check(&local
->hw
, SPECTRUM_MGMT
))
714 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
716 if (ifmgd
->flags
& IEEE80211_STA_ENABLE_RRM
)
717 capab
|= WLAN_CAPABILITY_RADIO_MEASURE
;
719 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
721 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
722 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
723 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
725 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
727 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
728 IEEE80211_STYPE_REASSOC_REQ
);
729 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
730 mgmt
->u
.reassoc_req
.listen_interval
=
731 cpu_to_le16(local
->hw
.conf
.listen_interval
);
732 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
736 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
737 IEEE80211_STYPE_ASSOC_REQ
);
738 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
739 mgmt
->u
.assoc_req
.listen_interval
=
740 cpu_to_le16(local
->hw
.conf
.listen_interval
);
744 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
745 *pos
++ = WLAN_EID_SSID
;
746 *pos
++ = assoc_data
->ssid_len
;
747 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
749 /* add all rates which were marked to be used above */
750 supp_rates_len
= rates_len
;
751 if (supp_rates_len
> 8)
754 pos
= skb_put(skb
, supp_rates_len
+ 2);
755 *pos
++ = WLAN_EID_SUPP_RATES
;
756 *pos
++ = supp_rates_len
;
759 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
760 if (BIT(i
) & rates
) {
761 int rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
769 if (rates_len
> count
) {
770 pos
= skb_put(skb
, rates_len
- count
+ 2);
771 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
772 *pos
++ = rates_len
- count
;
774 for (i
++; i
< sband
->n_bitrates
; i
++) {
775 if (BIT(i
) & rates
) {
777 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
784 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
||
785 capab
& WLAN_CAPABILITY_RADIO_MEASURE
) {
786 pos
= skb_put(skb
, 4);
787 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
789 *pos
++ = 0; /* min tx power */
791 *pos
++ = ieee80211_chandef_max_power(&chanctx_conf
->def
);
794 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
795 /* TODO: get this in reg domain format */
796 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
797 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
798 *pos
++ = 2 * sband
->n_channels
;
799 for (i
= 0; i
< sband
->n_channels
; i
++) {
800 *pos
++ = ieee80211_frequency_to_channel(
801 sband
->channels
[i
].center_freq
);
802 *pos
++ = 1; /* one channel in the subband*/
806 /* if present, add any custom IEs that go before HT */
807 if (assoc_data
->ie_len
) {
808 static const u8 before_ht
[] = {
811 WLAN_EID_EXT_SUPP_RATES
,
812 WLAN_EID_PWR_CAPABILITY
,
813 WLAN_EID_SUPPORTED_CHANNELS
,
816 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
817 WLAN_EID_MOBILITY_DOMAIN
,
818 WLAN_EID_FAST_BSS_TRANSITION
, /* reassoc only */
819 WLAN_EID_RIC_DATA
, /* reassoc only */
820 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
822 static const u8 after_ric
[] = {
823 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
824 WLAN_EID_HT_CAPABILITY
,
825 WLAN_EID_BSS_COEX_2040
,
826 WLAN_EID_EXT_CAPABILITY
,
827 WLAN_EID_QOS_TRAFFIC_CAPA
,
828 WLAN_EID_TIM_BCAST_REQ
,
829 WLAN_EID_INTERWORKING
,
830 /* 60GHz doesn't happen right now */
831 WLAN_EID_VHT_CAPABILITY
,
832 WLAN_EID_OPMODE_NOTIF
,
835 noffset
= ieee80211_ie_split_ric(assoc_data
->ie
,
838 ARRAY_SIZE(before_ht
),
840 ARRAY_SIZE(after_ric
),
842 pos
= skb_put(skb
, noffset
- offset
);
843 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
847 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
848 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
849 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
851 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
852 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
853 sband
, chan
, sdata
->smps_mode
);
855 /* if present, add any custom IEs that go before VHT */
856 if (assoc_data
->ie_len
) {
857 static const u8 before_vht
[] = {
860 WLAN_EID_EXT_SUPP_RATES
,
861 WLAN_EID_PWR_CAPABILITY
,
862 WLAN_EID_SUPPORTED_CHANNELS
,
865 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
866 WLAN_EID_MOBILITY_DOMAIN
,
867 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
868 WLAN_EID_HT_CAPABILITY
,
869 WLAN_EID_BSS_COEX_2040
,
870 WLAN_EID_EXT_CAPABILITY
,
871 WLAN_EID_QOS_TRAFFIC_CAPA
,
872 WLAN_EID_TIM_BCAST_REQ
,
873 WLAN_EID_INTERWORKING
,
876 /* RIC already taken above, so no need to handle here anymore */
877 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
878 before_vht
, ARRAY_SIZE(before_vht
),
880 pos
= skb_put(skb
, noffset
- offset
);
881 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
885 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
886 ieee80211_add_vht_ie(sdata
, skb
, sband
,
887 &assoc_data
->ap_vht_cap
);
889 /* if present, add any custom non-vendor IEs that go after HT */
890 if (assoc_data
->ie_len
) {
891 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
894 pos
= skb_put(skb
, noffset
- offset
);
895 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
899 if (assoc_data
->wmm
) {
900 if (assoc_data
->uapsd
) {
901 qos_info
= ifmgd
->uapsd_queues
;
902 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
903 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
908 pos
= ieee80211_add_wmm_info_ie(skb_put(skb
, 9), qos_info
);
911 /* add any remaining custom (i.e. vendor specific here) IEs */
912 if (assoc_data
->ie_len
) {
913 noffset
= assoc_data
->ie_len
;
914 pos
= skb_put(skb
, noffset
- offset
);
915 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
918 drv_mgd_prepare_tx(local
, sdata
);
920 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
921 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
922 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
923 IEEE80211_TX_INTFL_MLME_CONN_TX
;
924 ieee80211_tx_skb(sdata
, skb
);
927 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
928 struct ieee80211_sub_if_data
*sdata
)
930 struct ieee80211_pspoll
*pspoll
;
933 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
937 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
938 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
940 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
941 ieee80211_tx_skb(sdata
, skb
);
944 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
945 struct ieee80211_sub_if_data
*sdata
,
949 struct ieee80211_hdr_3addr
*nullfunc
;
950 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
952 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
956 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
958 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
960 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
961 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
963 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
964 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
966 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
967 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
969 ieee80211_tx_skb(sdata
, skb
);
972 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
973 struct ieee80211_sub_if_data
*sdata
)
976 struct ieee80211_hdr
*nullfunc
;
979 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
982 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
986 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
988 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
989 memset(nullfunc
, 0, 30);
990 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
991 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
992 nullfunc
->frame_control
= fc
;
993 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
994 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
995 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
996 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
998 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
999 ieee80211_tx_skb(sdata
, skb
);
1002 /* spectrum management related things */
1003 static void ieee80211_chswitch_work(struct work_struct
*work
)
1005 struct ieee80211_sub_if_data
*sdata
=
1006 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
1007 struct ieee80211_local
*local
= sdata
->local
;
1008 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1011 if (!ieee80211_sdata_running(sdata
))
1015 mutex_lock(&local
->mtx
);
1016 mutex_lock(&local
->chanctx_mtx
);
1018 if (!ifmgd
->associated
)
1021 if (!sdata
->vif
.csa_active
)
1025 * using reservation isn't immediate as it may be deferred until later
1026 * with multi-vif. once reservation is complete it will re-schedule the
1027 * work with no reserved_chanctx so verify chandef to check if it
1028 * completed successfully
1031 if (sdata
->reserved_chanctx
) {
1033 * with multi-vif csa driver may call ieee80211_csa_finish()
1034 * many times while waiting for other interfaces to use their
1037 if (sdata
->reserved_ready
)
1040 ret
= ieee80211_vif_use_reserved_context(sdata
);
1043 "failed to use reserved channel context, disconnecting (err=%d)\n",
1045 ieee80211_queue_work(&sdata
->local
->hw
,
1046 &ifmgd
->csa_connection_drop_work
);
1053 if (!cfg80211_chandef_identical(&sdata
->vif
.bss_conf
.chandef
,
1054 &sdata
->csa_chandef
)) {
1056 "failed to finalize channel switch, disconnecting\n");
1057 ieee80211_queue_work(&sdata
->local
->hw
,
1058 &ifmgd
->csa_connection_drop_work
);
1062 /* XXX: shouldn't really modify cfg80211-owned data! */
1063 ifmgd
->associated
->channel
= sdata
->csa_chandef
.chan
;
1065 ifmgd
->csa_waiting_bcn
= true;
1067 ieee80211_sta_reset_beacon_monitor(sdata
);
1068 ieee80211_sta_reset_conn_monitor(sdata
);
1071 mutex_unlock(&local
->chanctx_mtx
);
1072 mutex_unlock(&local
->mtx
);
1073 sdata_unlock(sdata
);
1076 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data
*sdata
)
1078 struct ieee80211_local
*local
= sdata
->local
;
1079 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1082 sdata_assert_lock(sdata
);
1084 WARN_ON(!sdata
->vif
.csa_active
);
1086 if (sdata
->csa_block_tx
) {
1087 ieee80211_wake_vif_queues(local
, sdata
,
1088 IEEE80211_QUEUE_STOP_REASON_CSA
);
1089 sdata
->csa_block_tx
= false;
1092 sdata
->vif
.csa_active
= false;
1093 ifmgd
->csa_waiting_bcn
= false;
1095 ret
= drv_post_channel_switch(sdata
);
1098 "driver post channel switch failed, disconnecting\n");
1099 ieee80211_queue_work(&local
->hw
,
1100 &ifmgd
->csa_connection_drop_work
);
1104 cfg80211_ch_switch_notify(sdata
->dev
, &sdata
->reserved_chandef
);
1107 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
1109 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1110 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1112 trace_api_chswitch_done(sdata
, success
);
1115 "driver channel switch failed, disconnecting\n");
1116 ieee80211_queue_work(&sdata
->local
->hw
,
1117 &ifmgd
->csa_connection_drop_work
);
1119 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1122 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1124 static void ieee80211_chswitch_timer(unsigned long data
)
1126 struct ieee80211_sub_if_data
*sdata
=
1127 (struct ieee80211_sub_if_data
*) data
;
1129 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1133 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1134 u64 timestamp
, u32 device_timestamp
,
1135 struct ieee802_11_elems
*elems
,
1138 struct ieee80211_local
*local
= sdata
->local
;
1139 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1140 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1141 struct ieee80211_chanctx_conf
*conf
;
1142 struct ieee80211_chanctx
*chanctx
;
1143 enum ieee80211_band current_band
;
1144 struct ieee80211_csa_ie csa_ie
;
1145 struct ieee80211_channel_switch ch_switch
;
1148 sdata_assert_lock(sdata
);
1153 if (local
->scanning
)
1156 /* disregard subsequent announcements if we are already processing */
1157 if (sdata
->vif
.csa_active
)
1160 current_band
= cbss
->channel
->band
;
1161 memset(&csa_ie
, 0, sizeof(csa_ie
));
1162 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, current_band
,
1164 ifmgd
->associated
->bssid
, &csa_ie
);
1166 ieee80211_queue_work(&local
->hw
,
1167 &ifmgd
->csa_connection_drop_work
);
1171 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
1172 IEEE80211_CHAN_DISABLED
)) {
1174 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1175 ifmgd
->associated
->bssid
,
1176 csa_ie
.chandef
.chan
->center_freq
,
1177 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
1178 csa_ie
.chandef
.center_freq2
);
1179 ieee80211_queue_work(&local
->hw
,
1180 &ifmgd
->csa_connection_drop_work
);
1184 if (cfg80211_chandef_identical(&csa_ie
.chandef
,
1185 &sdata
->vif
.bss_conf
.chandef
)) {
1186 if (ifmgd
->csa_ignored_same_chan
)
1189 "AP %pM tries to chanswitch to same channel, ignore\n",
1190 ifmgd
->associated
->bssid
);
1191 ifmgd
->csa_ignored_same_chan
= true;
1196 * Drop all TDLS peers - either we disconnect or move to a different
1197 * channel from this point on. There's no telling what our peer will do.
1198 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1199 * have an incompatible wider chandef.
1201 ieee80211_teardown_tdls_peers(sdata
);
1203 mutex_lock(&local
->mtx
);
1204 mutex_lock(&local
->chanctx_mtx
);
1205 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1206 lockdep_is_held(&local
->chanctx_mtx
));
1209 "no channel context assigned to vif?, disconnecting\n");
1210 goto drop_connection
;
1213 chanctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1215 if (local
->use_chanctx
&&
1216 !ieee80211_hw_check(&local
->hw
, CHANCTX_STA_CSA
)) {
1218 "driver doesn't support chan-switch with channel contexts\n");
1219 goto drop_connection
;
1222 ch_switch
.timestamp
= timestamp
;
1223 ch_switch
.device_timestamp
= device_timestamp
;
1224 ch_switch
.block_tx
= csa_ie
.mode
;
1225 ch_switch
.chandef
= csa_ie
.chandef
;
1226 ch_switch
.count
= csa_ie
.count
;
1228 if (drv_pre_channel_switch(sdata
, &ch_switch
)) {
1230 "preparing for channel switch failed, disconnecting\n");
1231 goto drop_connection
;
1234 res
= ieee80211_vif_reserve_chanctx(sdata
, &csa_ie
.chandef
,
1235 chanctx
->mode
, false);
1238 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1240 goto drop_connection
;
1242 mutex_unlock(&local
->chanctx_mtx
);
1244 sdata
->vif
.csa_active
= true;
1245 sdata
->csa_chandef
= csa_ie
.chandef
;
1246 sdata
->csa_block_tx
= csa_ie
.mode
;
1247 ifmgd
->csa_ignored_same_chan
= false;
1249 if (sdata
->csa_block_tx
)
1250 ieee80211_stop_vif_queues(local
, sdata
,
1251 IEEE80211_QUEUE_STOP_REASON_CSA
);
1252 mutex_unlock(&local
->mtx
);
1254 cfg80211_ch_switch_started_notify(sdata
->dev
, &csa_ie
.chandef
,
1257 if (local
->ops
->channel_switch
) {
1258 /* use driver's channel switch callback */
1259 drv_channel_switch(local
, sdata
, &ch_switch
);
1263 /* channel switch handled in software */
1264 if (csa_ie
.count
<= 1)
1265 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1267 mod_timer(&ifmgd
->chswitch_timer
,
1268 TU_TO_EXP_TIME((csa_ie
.count
- 1) *
1269 cbss
->beacon_interval
));
1272 ieee80211_queue_work(&local
->hw
, &ifmgd
->csa_connection_drop_work
);
1273 mutex_unlock(&local
->chanctx_mtx
);
1274 mutex_unlock(&local
->mtx
);
1278 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1279 struct ieee80211_channel
*channel
,
1280 const u8
*country_ie
, u8 country_ie_len
,
1281 const u8
*pwr_constr_elem
,
1282 int *chan_pwr
, int *pwr_reduction
)
1284 struct ieee80211_country_ie_triplet
*triplet
;
1285 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1286 int i
, chan_increment
;
1287 bool have_chan_pwr
= false;
1290 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1293 triplet
= (void *)(country_ie
+ 3);
1294 country_ie_len
-= 3;
1296 switch (channel
->band
) {
1300 case IEEE80211_BAND_2GHZ
:
1301 case IEEE80211_BAND_60GHZ
:
1304 case IEEE80211_BAND_5GHZ
:
1310 while (country_ie_len
>= 3) {
1311 u8 first_channel
= triplet
->chans
.first_channel
;
1313 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1316 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1317 if (first_channel
+ i
* chan_increment
== chan
) {
1318 have_chan_pwr
= true;
1319 *chan_pwr
= triplet
->chans
.max_power
;
1328 country_ie_len
-= 3;
1331 if (have_chan_pwr
&& pwr_constr_elem
)
1332 *pwr_reduction
= *pwr_constr_elem
;
1336 return have_chan_pwr
;
1339 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data
*sdata
,
1340 struct ieee80211_channel
*channel
,
1341 const u8
*cisco_dtpc_ie
,
1344 /* From practical testing, the first data byte of the DTPC element
1345 * seems to contain the requested dBm level, and the CLI on Cisco
1346 * APs clearly state the range is -127 to 127 dBm, which indicates
1347 * a signed byte, although it seemingly never actually goes negative.
1348 * The other byte seems to always be zero.
1350 *pwr_level
= (__s8
)cisco_dtpc_ie
[4];
1353 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1354 struct ieee80211_channel
*channel
,
1355 struct ieee80211_mgmt
*mgmt
,
1356 const u8
*country_ie
, u8 country_ie_len
,
1357 const u8
*pwr_constr_ie
,
1358 const u8
*cisco_dtpc_ie
)
1360 bool has_80211h_pwr
= false, has_cisco_pwr
= false;
1361 int chan_pwr
= 0, pwr_reduction_80211h
= 0;
1362 int pwr_level_cisco
, pwr_level_80211h
;
1364 __le16 capab
= mgmt
->u
.probe_resp
.capab_info
;
1367 (capab
& cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
) ||
1368 capab
& cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE
))) {
1369 has_80211h_pwr
= ieee80211_find_80211h_pwr_constr(
1370 sdata
, channel
, country_ie
, country_ie_len
,
1371 pwr_constr_ie
, &chan_pwr
, &pwr_reduction_80211h
);
1373 max_t(int, 0, chan_pwr
- pwr_reduction_80211h
);
1376 if (cisco_dtpc_ie
) {
1377 ieee80211_find_cisco_dtpc(
1378 sdata
, channel
, cisco_dtpc_ie
, &pwr_level_cisco
);
1379 has_cisco_pwr
= true;
1382 if (!has_80211h_pwr
&& !has_cisco_pwr
)
1385 /* If we have both 802.11h and Cisco DTPC, apply both limits
1386 * by picking the smallest of the two power levels advertised.
1388 if (has_80211h_pwr
&&
1389 (!has_cisco_pwr
|| pwr_level_80211h
<= pwr_level_cisco
)) {
1391 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1392 pwr_level_80211h
, chan_pwr
, pwr_reduction_80211h
,
1393 sdata
->u
.mgd
.bssid
);
1394 new_ap_level
= pwr_level_80211h
;
1395 } else { /* has_cisco_pwr is always true here. */
1397 "Limiting TX power to %d dBm as advertised by %pM\n",
1398 pwr_level_cisco
, sdata
->u
.mgd
.bssid
);
1399 new_ap_level
= pwr_level_cisco
;
1402 if (sdata
->ap_power_level
== new_ap_level
)
1405 sdata
->ap_power_level
= new_ap_level
;
1406 if (__ieee80211_recalc_txpower(sdata
))
1407 return BSS_CHANGED_TXPOWER
;
1412 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1413 struct ieee80211_sub_if_data
*sdata
)
1415 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1418 * If we are scanning right now then the parameters will
1419 * take effect when scan finishes.
1421 if (local
->scanning
)
1424 if (conf
->dynamic_ps_timeout
> 0 &&
1425 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
)) {
1426 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1427 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1429 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
))
1430 ieee80211_send_nullfunc(local
, sdata
, 1);
1432 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1433 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
1436 conf
->flags
|= IEEE80211_CONF_PS
;
1437 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1441 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1443 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1445 if (local
->ps_sdata
) {
1446 ieee80211_enable_ps(local
, local
->ps_sdata
);
1447 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1448 conf
->flags
&= ~IEEE80211_CONF_PS
;
1449 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1450 del_timer_sync(&local
->dynamic_ps_timer
);
1451 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1455 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1457 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1458 struct sta_info
*sta
= NULL
;
1459 bool authorized
= false;
1461 if (!mgd
->powersave
)
1467 if (!mgd
->associated
)
1470 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1473 if (!mgd
->have_beacon
)
1477 sta
= sta_info_get(sdata
, mgd
->bssid
);
1479 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1485 /* need to hold RTNL or interface lock */
1486 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1488 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1492 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
)) {
1493 local
->ps_sdata
= NULL
;
1497 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1498 if (!ieee80211_sdata_running(sdata
))
1500 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1501 /* If an AP vif is found, then disable PS
1502 * by setting the count to zero thereby setting
1508 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1514 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1518 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1520 beaconint_us
= ieee80211_tu_to_usec(
1521 found
->vif
.bss_conf
.beacon_int
);
1523 timeout
= local
->dynamic_ps_forced_timeout
;
1526 * Go to full PSM if the user configures a very low
1527 * latency requirement.
1528 * The 2000 second value is there for compatibility
1529 * until the PM_QOS_NETWORK_LATENCY is configured
1532 if (latency
> (1900 * USEC_PER_MSEC
) &&
1533 latency
!= (2000 * USEC_PER_SEC
))
1538 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1540 if (beaconint_us
> latency
) {
1541 local
->ps_sdata
= NULL
;
1544 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1546 /* If the TIM IE is invalid, pretend the value is 1 */
1549 else if (dtimper
> 1)
1550 maxslp
= min_t(int, dtimper
,
1551 latency
/ beaconint_us
);
1553 local
->hw
.conf
.max_sleep_period
= maxslp
;
1554 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1555 local
->ps_sdata
= found
;
1558 local
->ps_sdata
= NULL
;
1561 ieee80211_change_ps(local
);
1564 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1566 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1568 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1569 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1570 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1574 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1576 struct ieee80211_local
*local
=
1577 container_of(work
, struct ieee80211_local
,
1578 dynamic_ps_disable_work
);
1580 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1581 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1582 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1585 ieee80211_wake_queues_by_reason(&local
->hw
,
1586 IEEE80211_MAX_QUEUE_MAP
,
1587 IEEE80211_QUEUE_STOP_REASON_PS
,
1591 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1593 struct ieee80211_local
*local
=
1594 container_of(work
, struct ieee80211_local
,
1595 dynamic_ps_enable_work
);
1596 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1597 struct ieee80211_if_managed
*ifmgd
;
1598 unsigned long flags
;
1601 /* can only happen when PS was just disabled anyway */
1605 ifmgd
= &sdata
->u
.mgd
;
1607 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1610 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1611 /* don't enter PS if TX frames are pending */
1612 if (drv_tx_frames_pending(local
)) {
1613 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1615 local
->hw
.conf
.dynamic_ps_timeout
));
1620 * transmission can be stopped by others which leads to
1621 * dynamic_ps_timer expiry. Postpone the ps timer if it
1622 * is not the actual idle state.
1624 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1625 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1626 if (local
->queue_stop_reasons
[q
]) {
1627 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1629 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1631 local
->hw
.conf
.dynamic_ps_timeout
));
1635 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1638 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1639 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1640 if (drv_tx_frames_pending(local
)) {
1641 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1643 local
->hw
.conf
.dynamic_ps_timeout
));
1645 ieee80211_send_nullfunc(local
, sdata
, 1);
1646 /* Flush to get the tx status of nullfunc frame */
1647 ieee80211_flush_queues(local
, sdata
, false);
1651 if (!(ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
) &&
1652 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
)) ||
1653 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1654 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1655 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1656 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1660 void ieee80211_dynamic_ps_timer(unsigned long data
)
1662 struct ieee80211_local
*local
= (void *) data
;
1664 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1667 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1669 struct delayed_work
*delayed_work
=
1670 container_of(work
, struct delayed_work
, work
);
1671 struct ieee80211_sub_if_data
*sdata
=
1672 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1673 dfs_cac_timer_work
);
1674 struct cfg80211_chan_def chandef
= sdata
->vif
.bss_conf
.chandef
;
1676 mutex_lock(&sdata
->local
->mtx
);
1677 if (sdata
->wdev
.cac_started
) {
1678 ieee80211_vif_release_channel(sdata
);
1679 cfg80211_cac_event(sdata
->dev
, &chandef
,
1680 NL80211_RADAR_CAC_FINISHED
,
1683 mutex_unlock(&sdata
->local
->mtx
);
1687 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1689 struct ieee80211_local
*local
= sdata
->local
;
1690 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1694 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1697 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1698 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
1700 unsigned long now
= jiffies
;
1702 if (tx_tspec
->action
== TX_TSPEC_ACTION_NONE
&&
1703 tx_tspec
->admitted_time
&&
1704 time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1705 tx_tspec
->consumed_tx_time
= 0;
1706 tx_tspec
->time_slice_start
= now
;
1708 if (tx_tspec
->downgraded
)
1710 TX_TSPEC_ACTION_STOP_DOWNGRADE
;
1713 switch (tx_tspec
->action
) {
1714 case TX_TSPEC_ACTION_STOP_DOWNGRADE
:
1715 /* take the original parameters */
1716 if (drv_conf_tx(local
, sdata
, ac
, &sdata
->tx_conf
[ac
]))
1718 "failed to set TX queue parameters for queue %d\n",
1720 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1721 tx_tspec
->downgraded
= false;
1724 case TX_TSPEC_ACTION_DOWNGRADE
:
1725 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1726 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1730 /* downgrade next lower non-ACM AC */
1731 for (non_acm_ac
= ac
+ 1;
1732 non_acm_ac
< IEEE80211_NUM_ACS
;
1734 if (!(sdata
->wmm_acm
& BIT(7 - 2 * non_acm_ac
)))
1736 /* The loop will result in using BK even if it requires
1737 * admission control, such configuration makes no sense
1738 * and we have to transmit somehow - the AC selection
1739 * does the same thing.
1741 if (drv_conf_tx(local
, sdata
, ac
,
1742 &sdata
->tx_conf
[non_acm_ac
]))
1744 "failed to set TX queue parameters for queue %d\n",
1746 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1748 schedule_delayed_work(&ifmgd
->tx_tspec_wk
,
1749 tx_tspec
->time_slice_start
+ HZ
- now
+ 1);
1751 case TX_TSPEC_ACTION_NONE
:
1760 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1762 if (__ieee80211_sta_handle_tspec_ac_params(sdata
))
1763 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
1766 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct
*work
)
1768 struct ieee80211_sub_if_data
*sdata
;
1770 sdata
= container_of(work
, struct ieee80211_sub_if_data
,
1771 u
.mgd
.tx_tspec_wk
.work
);
1772 ieee80211_sta_handle_tspec_ac_params(sdata
);
1776 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1777 struct ieee80211_sub_if_data
*sdata
,
1778 const u8
*wmm_param
, size_t wmm_param_len
)
1780 struct ieee80211_tx_queue_params params
;
1781 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1785 u8 uapsd_queues
= 0;
1787 if (!local
->ops
->conf_tx
)
1790 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1796 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1799 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1800 uapsd_queues
= ifmgd
->uapsd_queues
;
1802 count
= wmm_param
[6] & 0x0f;
1803 if (count
== ifmgd
->wmm_last_param_set
)
1805 ifmgd
->wmm_last_param_set
= count
;
1807 pos
= wmm_param
+ 8;
1808 left
= wmm_param_len
- 8;
1810 memset(¶ms
, 0, sizeof(params
));
1813 for (; left
>= 4; left
-= 4, pos
+= 4) {
1814 int aci
= (pos
[0] >> 5) & 0x03;
1815 int acm
= (pos
[0] >> 4) & 0x01;
1823 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1824 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1830 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1831 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1837 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1838 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1845 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1846 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1851 params
.aifs
= pos
[0] & 0x0f;
1852 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1853 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1854 params
.txop
= get_unaligned_le16(pos
+ 2);
1856 params
.uapsd
= uapsd
;
1859 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1861 params
.aifs
, params
.cw_min
, params
.cw_max
,
1862 params
.txop
, params
.uapsd
,
1863 ifmgd
->tx_tspec
[queue
].downgraded
);
1864 sdata
->tx_conf
[queue
] = params
;
1865 if (!ifmgd
->tx_tspec
[queue
].downgraded
&&
1866 drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1868 "failed to set TX queue parameters for queue %d\n",
1872 /* enable WMM or activate new settings */
1873 sdata
->vif
.bss_conf
.qos
= true;
1877 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1879 lockdep_assert_held(&sdata
->local
->mtx
);
1881 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1882 ieee80211_run_deferred_scan(sdata
->local
);
1885 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1887 mutex_lock(&sdata
->local
->mtx
);
1888 __ieee80211_stop_poll(sdata
);
1889 mutex_unlock(&sdata
->local
->mtx
);
1892 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1893 u16 capab
, bool erp_valid
, u8 erp
)
1895 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1897 bool use_protection
;
1898 bool use_short_preamble
;
1899 bool use_short_slot
;
1902 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1903 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1905 use_protection
= false;
1906 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1909 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1910 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1911 use_short_slot
= true;
1913 if (use_protection
!= bss_conf
->use_cts_prot
) {
1914 bss_conf
->use_cts_prot
= use_protection
;
1915 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1918 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1919 bss_conf
->use_short_preamble
= use_short_preamble
;
1920 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1923 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1924 bss_conf
->use_short_slot
= use_short_slot
;
1925 changed
|= BSS_CHANGED_ERP_SLOT
;
1931 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1932 struct cfg80211_bss
*cbss
,
1933 u32 bss_info_changed
)
1935 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1936 struct ieee80211_local
*local
= sdata
->local
;
1937 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1939 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1940 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1941 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1943 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1944 beacon_loss_count
* bss_conf
->beacon_int
));
1946 sdata
->u
.mgd
.associated
= cbss
;
1947 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1949 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1951 if (sdata
->vif
.p2p
) {
1952 const struct cfg80211_bss_ies
*ies
;
1955 ies
= rcu_dereference(cbss
->ies
);
1959 ret
= cfg80211_get_p2p_attr(
1960 ies
->data
, ies
->len
,
1961 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1962 (u8
*) &bss_conf
->p2p_noa_attr
,
1963 sizeof(bss_conf
->p2p_noa_attr
));
1965 sdata
->u
.mgd
.p2p_noa_index
=
1966 bss_conf
->p2p_noa_attr
.index
;
1967 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1973 /* just to be sure */
1974 ieee80211_stop_poll(sdata
);
1976 ieee80211_led_assoc(local
, 1);
1978 if (sdata
->u
.mgd
.have_beacon
) {
1980 * If the AP is buggy we may get here with no DTIM period
1981 * known, so assume it's 1 which is the only safe assumption
1982 * in that case, although if the TIM IE is broken powersave
1983 * probably just won't work at all.
1985 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1986 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1987 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1989 bss_conf
->beacon_rate
= NULL
;
1990 bss_conf
->dtim_period
= 0;
1993 bss_conf
->assoc
= 1;
1995 /* Tell the driver to monitor connection quality (if supported) */
1996 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1997 bss_conf
->cqm_rssi_thold
)
1998 bss_info_changed
|= BSS_CHANGED_CQM
;
2000 /* Enable ARP filtering */
2001 if (bss_conf
->arp_addr_cnt
)
2002 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
2004 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
2006 mutex_lock(&local
->iflist_mtx
);
2007 ieee80211_recalc_ps(local
, -1);
2008 mutex_unlock(&local
->iflist_mtx
);
2010 ieee80211_recalc_smps(sdata
);
2011 ieee80211_recalc_ps_vif(sdata
);
2013 netif_carrier_on(sdata
->dev
);
2016 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
2017 u16 stype
, u16 reason
, bool tx
,
2020 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2021 struct ieee80211_local
*local
= sdata
->local
;
2024 sdata_assert_lock(sdata
);
2026 if (WARN_ON_ONCE(tx
&& !frame_buf
))
2029 if (WARN_ON(!ifmgd
->associated
))
2032 ieee80211_stop_poll(sdata
);
2034 ifmgd
->associated
= NULL
;
2035 netif_carrier_off(sdata
->dev
);
2038 * if we want to get out of ps before disassoc (why?) we have
2039 * to do it before sending disassoc, as otherwise the null-packet
2042 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2043 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2044 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2046 local
->ps_sdata
= NULL
;
2048 /* disable per-vif ps */
2049 ieee80211_recalc_ps_vif(sdata
);
2051 /* make sure ongoing transmission finishes */
2055 * drop any frame before deauth/disassoc, this can be data or
2056 * management frame. Since we are disconnecting, we should not
2057 * insist sending these frames which can take time and delay
2058 * the disconnection and possible the roaming.
2061 ieee80211_flush_queues(local
, sdata
, true);
2063 /* deauthenticate/disassociate now */
2064 if (tx
|| frame_buf
)
2065 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
2066 reason
, tx
, frame_buf
);
2068 /* flush out frame - make sure the deauth was actually sent */
2070 ieee80211_flush_queues(local
, sdata
, false);
2072 /* clear bssid only after building the needed mgmt frames */
2073 eth_zero_addr(ifmgd
->bssid
);
2075 /* remove AP and TDLS peers */
2076 sta_info_flush(sdata
);
2078 /* finally reset all BSS / config parameters */
2079 changed
|= ieee80211_reset_erp_info(sdata
);
2081 ieee80211_led_assoc(local
, 0);
2082 changed
|= BSS_CHANGED_ASSOC
;
2083 sdata
->vif
.bss_conf
.assoc
= false;
2085 ifmgd
->p2p_noa_index
= -1;
2086 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
2087 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
2089 /* on the next assoc, re-program HT/VHT parameters */
2090 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
2091 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
2092 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
2093 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
2094 sdata
->flags
&= ~IEEE80211_SDATA_MU_MIMO_OWNER
;
2096 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
2098 del_timer_sync(&local
->dynamic_ps_timer
);
2099 cancel_work_sync(&local
->dynamic_ps_enable_work
);
2101 /* Disable ARP filtering */
2102 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
2103 changed
|= BSS_CHANGED_ARP_FILTER
;
2105 sdata
->vif
.bss_conf
.qos
= false;
2106 changed
|= BSS_CHANGED_QOS
;
2108 /* The BSSID (not really interesting) and HT changed */
2109 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
2110 ieee80211_bss_info_change_notify(sdata
, changed
);
2112 /* disassociated - set to defaults now */
2113 ieee80211_set_wmm_default(sdata
, false);
2115 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
2116 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
2117 del_timer_sync(&sdata
->u
.mgd
.timer
);
2118 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
2120 sdata
->vif
.bss_conf
.dtim_period
= 0;
2121 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
2123 ifmgd
->have_beacon
= false;
2126 mutex_lock(&local
->mtx
);
2127 ieee80211_vif_release_channel(sdata
);
2129 sdata
->vif
.csa_active
= false;
2130 ifmgd
->csa_waiting_bcn
= false;
2131 ifmgd
->csa_ignored_same_chan
= false;
2132 if (sdata
->csa_block_tx
) {
2133 ieee80211_wake_vif_queues(local
, sdata
,
2134 IEEE80211_QUEUE_STOP_REASON_CSA
);
2135 sdata
->csa_block_tx
= false;
2137 mutex_unlock(&local
->mtx
);
2139 /* existing TX TSPEC sessions no longer exist */
2140 memset(ifmgd
->tx_tspec
, 0, sizeof(ifmgd
->tx_tspec
));
2141 cancel_delayed_work_sync(&ifmgd
->tx_tspec_wk
);
2143 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2146 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
2147 struct ieee80211_hdr
*hdr
)
2150 * We can postpone the mgd.timer whenever receiving unicast frames
2151 * from AP because we know that the connection is working both ways
2152 * at that time. But multicast frames (and hence also beacons) must
2153 * be ignored here, because we need to trigger the timer during
2154 * data idle periods for sending the periodic probe request to the
2155 * AP we're connected to.
2157 if (is_multicast_ether_addr(hdr
->addr1
))
2160 ieee80211_sta_reset_conn_monitor(sdata
);
2163 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
2165 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2166 struct ieee80211_local
*local
= sdata
->local
;
2168 mutex_lock(&local
->mtx
);
2169 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
2172 __ieee80211_stop_poll(sdata
);
2174 mutex_lock(&local
->iflist_mtx
);
2175 ieee80211_recalc_ps(local
, -1);
2176 mutex_unlock(&local
->iflist_mtx
);
2178 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
2182 * We've received a probe response, but are not sure whether
2183 * we have or will be receiving any beacons or data, so let's
2184 * schedule the timers again, just in case.
2186 ieee80211_sta_reset_beacon_monitor(sdata
);
2188 mod_timer(&ifmgd
->conn_mon_timer
,
2189 round_jiffies_up(jiffies
+
2190 IEEE80211_CONNECTION_IDLE_TIME
));
2192 mutex_unlock(&local
->mtx
);
2195 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data
*sdata
,
2196 struct ieee80211_hdr
*hdr
,
2199 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2200 u16 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
2201 int ac
= ieee80211_ac_from_tid(tid
);
2202 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
2203 unsigned long now
= jiffies
;
2205 if (likely(!tx_tspec
->admitted_time
))
2208 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
2209 tx_tspec
->consumed_tx_time
= 0;
2210 tx_tspec
->time_slice_start
= now
;
2212 if (tx_tspec
->downgraded
) {
2213 tx_tspec
->action
= TX_TSPEC_ACTION_STOP_DOWNGRADE
;
2214 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2218 if (tx_tspec
->downgraded
)
2221 tx_tspec
->consumed_tx_time
+= tx_time
;
2223 if (tx_tspec
->consumed_tx_time
>= tx_tspec
->admitted_time
) {
2224 tx_tspec
->downgraded
= true;
2225 tx_tspec
->action
= TX_TSPEC_ACTION_DOWNGRADE
;
2226 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2230 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
2231 struct ieee80211_hdr
*hdr
, bool ack
, u16 tx_time
)
2233 ieee80211_sta_tx_wmm_ac_notify(sdata
, hdr
, tx_time
);
2235 if (!ieee80211_is_data(hdr
->frame_control
))
2238 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
2239 sdata
->u
.mgd
.probe_send_count
> 0) {
2241 ieee80211_sta_reset_conn_monitor(sdata
);
2243 sdata
->u
.mgd
.nullfunc_failed
= true;
2244 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2249 ieee80211_sta_reset_conn_monitor(sdata
);
2252 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2254 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2256 u8
*dst
= ifmgd
->associated
->bssid
;
2257 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2260 * Try sending broadcast probe requests for the last three
2261 * probe requests after the first ones failed since some
2262 * buggy APs only support broadcast probe requests.
2264 if (ifmgd
->probe_send_count
>= unicast_limit
)
2268 * When the hardware reports an accurate Tx ACK status, it's
2269 * better to send a nullfunc frame instead of a probe request,
2270 * as it will kick us off the AP quickly if we aren't associated
2271 * anymore. The timeout will be reset if the frame is ACKed by
2274 ifmgd
->probe_send_count
++;
2276 if (ieee80211_hw_check(&sdata
->local
->hw
, REPORTS_TX_ACK_STATUS
)) {
2277 ifmgd
->nullfunc_failed
= false;
2278 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
2283 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2284 if (WARN_ON_ONCE(ssid
== NULL
))
2289 ieee80211_send_probe_req(sdata
, sdata
->vif
.addr
, dst
,
2290 ssid
+ 2, ssid_len
, NULL
,
2291 0, (u32
) -1, true, 0,
2292 ifmgd
->associated
->channel
, false);
2296 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2297 run_again(sdata
, ifmgd
->probe_timeout
);
2300 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2303 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2304 bool already
= false;
2306 if (!ieee80211_sdata_running(sdata
))
2311 if (!ifmgd
->associated
)
2314 mutex_lock(&sdata
->local
->mtx
);
2316 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2317 mutex_unlock(&sdata
->local
->mtx
);
2322 mlme_dbg_ratelimited(sdata
,
2323 "detected beacon loss from AP (missed %d beacons) - probing\n",
2326 ieee80211_cqm_beacon_loss_notify(&sdata
->vif
, GFP_KERNEL
);
2330 * The driver/our work has already reported this event or the
2331 * connection monitoring has kicked in and we have already sent
2332 * a probe request. Or maybe the AP died and the driver keeps
2333 * reporting until we disassociate...
2335 * In either case we have to ignore the current call to this
2336 * function (except for setting the correct probe reason bit)
2337 * because otherwise we would reset the timer every time and
2338 * never check whether we received a probe response!
2340 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
2343 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2345 mutex_unlock(&sdata
->local
->mtx
);
2350 mutex_lock(&sdata
->local
->iflist_mtx
);
2351 ieee80211_recalc_ps(sdata
->local
, -1);
2352 mutex_unlock(&sdata
->local
->iflist_mtx
);
2354 ifmgd
->probe_send_count
= 0;
2355 ieee80211_mgd_probe_ap_send(sdata
);
2357 sdata_unlock(sdata
);
2360 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2361 struct ieee80211_vif
*vif
)
2363 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2364 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2365 struct cfg80211_bss
*cbss
;
2366 struct sk_buff
*skb
;
2370 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2373 sdata_assert_lock(sdata
);
2375 if (ifmgd
->associated
)
2376 cbss
= ifmgd
->associated
;
2377 else if (ifmgd
->auth_data
)
2378 cbss
= ifmgd
->auth_data
->bss
;
2379 else if (ifmgd
->assoc_data
)
2380 cbss
= ifmgd
->assoc_data
->bss
;
2385 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2386 if (WARN_ON_ONCE(ssid
== NULL
))
2391 skb
= ieee80211_build_probe_req(sdata
, sdata
->vif
.addr
, cbss
->bssid
,
2392 (u32
) -1, cbss
->channel
,
2399 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2401 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data
*sdata
,
2402 const u8
*buf
, size_t len
, bool tx
,
2405 struct ieee80211_event event
= {
2407 .u
.mlme
.data
= tx
? DEAUTH_TX_EVENT
: DEAUTH_RX_EVENT
,
2408 .u
.mlme
.reason
= reason
,
2412 cfg80211_tx_mlme_mgmt(sdata
->dev
, buf
, len
);
2414 cfg80211_rx_mlme_mgmt(sdata
->dev
, buf
, len
);
2416 drv_event_callback(sdata
->local
, sdata
, &event
);
2419 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2421 struct ieee80211_local
*local
= sdata
->local
;
2422 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2423 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2426 if (!ifmgd
->associated
) {
2427 sdata_unlock(sdata
);
2431 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2432 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2434 mutex_lock(&local
->mtx
);
2435 sdata
->vif
.csa_active
= false;
2436 ifmgd
->csa_waiting_bcn
= false;
2437 if (sdata
->csa_block_tx
) {
2438 ieee80211_wake_vif_queues(local
, sdata
,
2439 IEEE80211_QUEUE_STOP_REASON_CSA
);
2440 sdata
->csa_block_tx
= false;
2442 mutex_unlock(&local
->mtx
);
2444 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
2445 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2447 sdata_unlock(sdata
);
2450 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2452 struct ieee80211_sub_if_data
*sdata
=
2453 container_of(work
, struct ieee80211_sub_if_data
,
2454 u
.mgd
.beacon_connection_loss_work
);
2455 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2456 struct sta_info
*sta
;
2458 if (ifmgd
->associated
) {
2460 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2462 sta
->beacon_loss_count
++;
2466 if (ifmgd
->connection_loss
) {
2467 sdata_info(sdata
, "Connection to AP %pM lost\n",
2469 __ieee80211_disconnect(sdata
);
2471 ieee80211_mgd_probe_ap(sdata
, true);
2475 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2477 struct ieee80211_sub_if_data
*sdata
=
2478 container_of(work
, struct ieee80211_sub_if_data
,
2479 u
.mgd
.csa_connection_drop_work
);
2481 __ieee80211_disconnect(sdata
);
2484 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2486 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2487 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2489 trace_api_beacon_loss(sdata
);
2491 sdata
->u
.mgd
.connection_loss
= false;
2492 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2494 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2496 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2498 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2499 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2501 trace_api_connection_loss(sdata
);
2503 sdata
->u
.mgd
.connection_loss
= true;
2504 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2506 EXPORT_SYMBOL(ieee80211_connection_loss
);
2509 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2512 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2514 sdata_assert_lock(sdata
);
2518 * we are not authenticated yet, the only timer that could be
2519 * running is the timeout for the authentication response which
2520 * which is not relevant anymore.
2522 del_timer_sync(&sdata
->u
.mgd
.timer
);
2523 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2525 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2526 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2527 sdata
->u
.mgd
.flags
= 0;
2528 mutex_lock(&sdata
->local
->mtx
);
2529 ieee80211_vif_release_channel(sdata
);
2530 mutex_unlock(&sdata
->local
->mtx
);
2533 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2535 sdata
->u
.mgd
.auth_data
= NULL
;
2538 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2541 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2543 sdata_assert_lock(sdata
);
2547 * we are not associated yet, the only timer that could be
2548 * running is the timeout for the association response which
2549 * which is not relevant anymore.
2551 del_timer_sync(&sdata
->u
.mgd
.timer
);
2552 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2554 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2555 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2556 sdata
->u
.mgd
.flags
= 0;
2557 sdata
->flags
&= ~IEEE80211_SDATA_MU_MIMO_OWNER
;
2558 mutex_lock(&sdata
->local
->mtx
);
2559 ieee80211_vif_release_channel(sdata
);
2560 mutex_unlock(&sdata
->local
->mtx
);
2564 sdata
->u
.mgd
.assoc_data
= NULL
;
2567 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2568 struct ieee80211_mgmt
*mgmt
, size_t len
)
2570 struct ieee80211_local
*local
= sdata
->local
;
2571 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2573 struct ieee802_11_elems elems
;
2576 pos
= mgmt
->u
.auth
.variable
;
2577 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2578 if (!elems
.challenge
)
2580 auth_data
->expected_transaction
= 4;
2581 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2582 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
2583 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2584 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2585 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2586 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2587 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2588 auth_data
->key
, auth_data
->key_len
,
2589 auth_data
->key_idx
, tx_flags
);
2592 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2593 struct ieee80211_mgmt
*mgmt
, size_t len
)
2595 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2597 u16 auth_alg
, auth_transaction
, status_code
;
2598 struct sta_info
*sta
;
2599 struct ieee80211_event event
= {
2601 .u
.mlme
.data
= AUTH_EVENT
,
2604 sdata_assert_lock(sdata
);
2609 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2612 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2614 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2617 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2618 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2619 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2621 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2622 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2623 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2624 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2626 ifmgd
->auth_data
->expected_transaction
);
2630 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2631 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2632 mgmt
->sa
, status_code
);
2633 ieee80211_destroy_auth_data(sdata
, false);
2634 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2635 event
.u
.mlme
.status
= MLME_DENIED
;
2636 event
.u
.mlme
.reason
= status_code
;
2637 drv_event_callback(sdata
->local
, sdata
, &event
);
2641 switch (ifmgd
->auth_data
->algorithm
) {
2642 case WLAN_AUTH_OPEN
:
2643 case WLAN_AUTH_LEAP
:
2647 case WLAN_AUTH_SHARED_KEY
:
2648 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2649 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2650 /* need another frame */
2655 WARN_ONCE(1, "invalid auth alg %d",
2656 ifmgd
->auth_data
->algorithm
);
2660 event
.u
.mlme
.status
= MLME_SUCCESS
;
2661 drv_event_callback(sdata
->local
, sdata
, &event
);
2662 sdata_info(sdata
, "authenticated\n");
2663 ifmgd
->auth_data
->done
= true;
2664 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2665 ifmgd
->auth_data
->timeout_started
= true;
2666 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2668 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2669 ifmgd
->auth_data
->expected_transaction
!= 2) {
2671 * Report auth frame to user space for processing since another
2672 * round of Authentication frames is still needed.
2674 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2678 /* move station state to auth */
2679 mutex_lock(&sdata
->local
->sta_mtx
);
2680 sta
= sta_info_get(sdata
, bssid
);
2682 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2685 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2686 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2689 mutex_unlock(&sdata
->local
->sta_mtx
);
2691 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2694 mutex_unlock(&sdata
->local
->sta_mtx
);
2695 /* ignore frame -- wait for timeout */
2698 #define case_WLAN(type) \
2699 case WLAN_REASON_##type: return #type
2701 static const char *ieee80211_get_reason_code_string(u16 reason_code
)
2703 switch (reason_code
) {
2704 case_WLAN(UNSPECIFIED
);
2705 case_WLAN(PREV_AUTH_NOT_VALID
);
2706 case_WLAN(DEAUTH_LEAVING
);
2707 case_WLAN(DISASSOC_DUE_TO_INACTIVITY
);
2708 case_WLAN(DISASSOC_AP_BUSY
);
2709 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA
);
2710 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA
);
2711 case_WLAN(DISASSOC_STA_HAS_LEFT
);
2712 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH
);
2713 case_WLAN(DISASSOC_BAD_POWER
);
2714 case_WLAN(DISASSOC_BAD_SUPP_CHAN
);
2715 case_WLAN(INVALID_IE
);
2716 case_WLAN(MIC_FAILURE
);
2717 case_WLAN(4WAY_HANDSHAKE_TIMEOUT
);
2718 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT
);
2719 case_WLAN(IE_DIFFERENT
);
2720 case_WLAN(INVALID_GROUP_CIPHER
);
2721 case_WLAN(INVALID_PAIRWISE_CIPHER
);
2722 case_WLAN(INVALID_AKMP
);
2723 case_WLAN(UNSUPP_RSN_VERSION
);
2724 case_WLAN(INVALID_RSN_IE_CAP
);
2725 case_WLAN(IEEE8021X_FAILED
);
2726 case_WLAN(CIPHER_SUITE_REJECTED
);
2727 case_WLAN(DISASSOC_UNSPECIFIED_QOS
);
2728 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH
);
2729 case_WLAN(DISASSOC_LOW_ACK
);
2730 case_WLAN(DISASSOC_QAP_EXCEED_TXOP
);
2731 case_WLAN(QSTA_LEAVE_QBSS
);
2732 case_WLAN(QSTA_NOT_USE
);
2733 case_WLAN(QSTA_REQUIRE_SETUP
);
2734 case_WLAN(QSTA_TIMEOUT
);
2735 case_WLAN(QSTA_CIPHER_NOT_SUPP
);
2736 case_WLAN(MESH_PEER_CANCELED
);
2737 case_WLAN(MESH_MAX_PEERS
);
2738 case_WLAN(MESH_CONFIG
);
2739 case_WLAN(MESH_CLOSE
);
2740 case_WLAN(MESH_MAX_RETRIES
);
2741 case_WLAN(MESH_CONFIRM_TIMEOUT
);
2742 case_WLAN(MESH_INVALID_GTK
);
2743 case_WLAN(MESH_INCONSISTENT_PARAM
);
2744 case_WLAN(MESH_INVALID_SECURITY
);
2745 case_WLAN(MESH_PATH_ERROR
);
2746 case_WLAN(MESH_PATH_NOFORWARD
);
2747 case_WLAN(MESH_PATH_DEST_UNREACHABLE
);
2748 case_WLAN(MAC_EXISTS_IN_MBSS
);
2749 case_WLAN(MESH_CHAN_REGULATORY
);
2750 case_WLAN(MESH_CHAN
);
2751 default: return "<unknown>";
2755 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2756 struct ieee80211_mgmt
*mgmt
, size_t len
)
2758 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2759 u16 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2761 sdata_assert_lock(sdata
);
2766 if (ifmgd
->associated
&&
2767 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
)) {
2768 const u8
*bssid
= ifmgd
->associated
->bssid
;
2770 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u=%s)\n",
2772 ieee80211_get_reason_code_string(reason_code
));
2774 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2776 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false,
2781 if (ifmgd
->assoc_data
&&
2782 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2783 const u8
*bssid
= ifmgd
->assoc_data
->bss
->bssid
;
2786 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2788 ieee80211_get_reason_code_string(reason_code
));
2790 ieee80211_destroy_assoc_data(sdata
, false);
2792 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2798 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2799 struct ieee80211_mgmt
*mgmt
, size_t len
)
2801 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2804 sdata_assert_lock(sdata
);
2809 if (!ifmgd
->associated
||
2810 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2813 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2815 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2816 mgmt
->sa
, reason_code
);
2818 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2820 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false, reason_code
);
2823 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2824 u8
*supp_rates
, unsigned int supp_rates_len
,
2825 u32
*rates
, u32
*basic_rates
,
2826 bool *have_higher_than_11mbit
,
2827 int *min_rate
, int *min_rate_index
,
2828 int shift
, u32 rate_flags
)
2832 for (i
= 0; i
< supp_rates_len
; i
++) {
2833 int rate
= supp_rates
[i
] & 0x7f;
2834 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2836 if ((rate
* 5 * (1 << shift
)) > 110)
2837 *have_higher_than_11mbit
= true;
2840 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2841 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2843 * Note: Even through the membership selector and the basic
2844 * rate flag share the same bit, they are not exactly
2847 if (!!(supp_rates
[i
] & 0x80) &&
2848 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2851 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2852 struct ieee80211_rate
*br
;
2855 br
= &sband
->bitrates
[j
];
2856 if ((rate_flags
& br
->flags
) != rate_flags
)
2859 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2860 if (brate
== rate
) {
2863 *basic_rates
|= BIT(j
);
2864 if ((rate
* 5) < *min_rate
) {
2865 *min_rate
= rate
* 5;
2866 *min_rate_index
= j
;
2874 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2875 struct cfg80211_bss
*cbss
,
2876 struct ieee80211_mgmt
*mgmt
, size_t len
)
2878 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2879 struct ieee80211_local
*local
= sdata
->local
;
2880 struct ieee80211_supported_band
*sband
;
2881 struct sta_info
*sta
;
2883 u16 capab_info
, aid
;
2884 struct ieee802_11_elems elems
;
2885 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2886 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2887 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2892 /* AssocResp and ReassocResp have identical structure */
2894 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2895 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2897 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2898 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2900 aid
&= ~(BIT(15) | BIT(14));
2902 ifmgd
->broken_ap
= false;
2904 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2905 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2908 ifmgd
->broken_ap
= true;
2911 pos
= mgmt
->u
.assoc_resp
.variable
;
2912 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2914 if (!elems
.supp_rates
) {
2915 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2920 ifmgd
->tdls_chan_switch_prohibited
=
2921 elems
.ext_capab
&& elems
.ext_capab_len
>= 5 &&
2922 (elems
.ext_capab
[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED
);
2925 * Some APs are erroneously not including some information in their
2926 * (re)association response frames. Try to recover by using the data
2927 * from the beacon or probe response. This seems to afflict mobile
2928 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2929 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2931 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2932 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2933 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2934 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2935 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2936 const struct cfg80211_bss_ies
*ies
;
2937 struct ieee802_11_elems bss_elems
;
2940 ies
= rcu_dereference(cbss
->ies
);
2942 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2948 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2950 if (assoc_data
->wmm
&&
2951 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2952 elems
.wmm_param
= bss_elems
.wmm_param
;
2954 "AP bug: WMM param missing from AssocResp\n");
2958 * Also check if we requested HT/VHT, otherwise the AP doesn't
2959 * have to include the IEs in the (re)association response.
2961 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2962 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2963 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2965 "AP bug: HT capability missing from AssocResp\n");
2967 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2968 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2969 elems
.ht_operation
= bss_elems
.ht_operation
;
2971 "AP bug: HT operation missing from AssocResp\n");
2973 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2974 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2975 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2977 "AP bug: VHT capa missing from AssocResp\n");
2979 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2980 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2981 elems
.vht_operation
= bss_elems
.vht_operation
;
2983 "AP bug: VHT operation missing from AssocResp\n");
2988 * We previously checked these in the beacon/probe response, so
2989 * they should be present here. This is just a safety net.
2991 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2992 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2994 "HT AP is missing WMM params or HT capability/operation\n");
2999 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3000 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
3002 "VHT AP is missing VHT capability/operation\n");
3007 mutex_lock(&sdata
->local
->sta_mtx
);
3009 * station info was already allocated and inserted before
3010 * the association and should be available to us
3012 sta
= sta_info_get(sdata
, cbss
->bssid
);
3013 if (WARN_ON(!sta
)) {
3014 mutex_unlock(&sdata
->local
->sta_mtx
);
3019 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
3021 /* Set up internal HT/VHT capabilities */
3022 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
3023 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
3024 elems
.ht_cap_elem
, sta
);
3026 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
3027 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
3028 elems
.vht_cap_elem
, sta
);
3031 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3032 * in their association response, so ignore that data for our own
3033 * configuration. If it changed since the last beacon, we'll get the
3034 * next beacon and update then.
3038 * If an operating mode notification IE is present, override the
3039 * NSS calculation (that would be done in rate_control_rate_init())
3040 * and use the # of streams from that element.
3042 if (elems
.opmode_notif
&&
3043 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
3046 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
3047 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
3049 sta
->sta
.rx_nss
= nss
;
3052 rate_control_rate_init(sta
);
3054 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
3055 set_sta_flag(sta
, WLAN_STA_MFP
);
3057 sta
->sta
.wme
= elems
.wmm_param
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
;
3059 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
3060 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
3061 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
3064 "failed to move station %pM to desired state\n",
3066 WARN_ON(__sta_info_destroy(sta
));
3067 mutex_unlock(&sdata
->local
->sta_mtx
);
3072 mutex_unlock(&sdata
->local
->sta_mtx
);
3075 * Always handle WMM once after association regardless
3076 * of the first value the AP uses. Setting -1 here has
3077 * that effect because the AP values is an unsigned
3080 ifmgd
->wmm_last_param_set
= -1;
3082 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) && elems
.wmm_param
)
3083 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3084 elems
.wmm_param_len
);
3086 ieee80211_set_wmm_default(sdata
, false);
3087 changed
|= BSS_CHANGED_QOS
;
3089 /* set AID and assoc capability,
3090 * ieee80211_set_associated() will tell the driver */
3091 bss_conf
->aid
= aid
;
3092 bss_conf
->assoc_capability
= capab_info
;
3093 ieee80211_set_associated(sdata
, cbss
, changed
);
3096 * If we're using 4-addr mode, let the AP know that we're
3097 * doing so, so that it can create the STA VLAN on its side
3099 if (ifmgd
->use_4addr
)
3100 ieee80211_send_4addr_nullfunc(local
, sdata
);
3103 * Start timer to probe the connection to the AP now.
3104 * Also start the timer that will detect beacon loss.
3106 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
3107 ieee80211_sta_reset_beacon_monitor(sdata
);
3115 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
3116 struct ieee80211_mgmt
*mgmt
,
3119 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3120 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
3121 u16 capab_info
, status_code
, aid
;
3122 struct ieee802_11_elems elems
;
3123 int ac
, uapsd_queues
= -1;
3126 struct cfg80211_bss
*bss
;
3127 struct ieee80211_event event
= {
3129 .u
.mlme
.data
= ASSOC_EVENT
,
3132 sdata_assert_lock(sdata
);
3136 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
3140 * AssocResp and ReassocResp have identical structure, so process both
3141 * of them in this function.
3147 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
3148 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
3149 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
3150 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
3153 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3154 reassoc
? "Rea" : "A", mgmt
->sa
,
3155 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
3157 pos
= mgmt
->u
.assoc_resp
.variable
;
3158 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
3160 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
3161 elems
.timeout_int
&&
3162 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
3164 tu
= le32_to_cpu(elems
.timeout_int
->value
);
3165 ms
= tu
* 1024 / 1000;
3167 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3169 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
3170 assoc_data
->timeout_started
= true;
3171 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
3172 run_again(sdata
, assoc_data
->timeout
);
3176 bss
= assoc_data
->bss
;
3178 if (status_code
!= WLAN_STATUS_SUCCESS
) {
3179 sdata_info(sdata
, "%pM denied association (code=%d)\n",
3180 mgmt
->sa
, status_code
);
3181 ieee80211_destroy_assoc_data(sdata
, false);
3182 event
.u
.mlme
.status
= MLME_DENIED
;
3183 event
.u
.mlme
.reason
= status_code
;
3184 drv_event_callback(sdata
->local
, sdata
, &event
);
3186 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
3187 /* oops -- internal error -- send timeout for now */
3188 ieee80211_destroy_assoc_data(sdata
, false);
3189 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3192 event
.u
.mlme
.status
= MLME_SUCCESS
;
3193 drv_event_callback(sdata
->local
, sdata
, &event
);
3194 sdata_info(sdata
, "associated\n");
3197 * destroy assoc_data afterwards, as otherwise an idle
3198 * recalc after assoc_data is NULL but before associated
3199 * is set can cause the interface to go idle
3201 ieee80211_destroy_assoc_data(sdata
, true);
3203 /* get uapsd queues configuration */
3205 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
3206 if (sdata
->tx_conf
[ac
].uapsd
)
3207 uapsd_queues
|= BIT(ac
);
3210 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
, uapsd_queues
);
3213 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
3214 struct ieee80211_mgmt
*mgmt
, size_t len
,
3215 struct ieee80211_rx_status
*rx_status
,
3216 struct ieee802_11_elems
*elems
)
3218 struct ieee80211_local
*local
= sdata
->local
;
3219 struct ieee80211_bss
*bss
;
3220 struct ieee80211_channel
*channel
;
3222 sdata_assert_lock(sdata
);
3224 channel
= ieee80211_get_channel(local
->hw
.wiphy
, rx_status
->freq
);
3228 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
3231 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
3232 ieee80211_rx_bss_put(local
, bss
);
3237 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
3238 struct sk_buff
*skb
)
3240 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
3241 struct ieee80211_if_managed
*ifmgd
;
3242 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
3243 size_t baselen
, len
= skb
->len
;
3244 struct ieee802_11_elems elems
;
3246 ifmgd
= &sdata
->u
.mgd
;
3248 sdata_assert_lock(sdata
);
3250 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
3251 return; /* ignore ProbeResp to foreign address */
3253 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
3257 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
3260 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3262 if (ifmgd
->associated
&&
3263 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3264 ieee80211_reset_ap_probe(sdata
);
3266 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
3267 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
3268 /* got probe response, continue with auth */
3269 sdata_info(sdata
, "direct probe responded\n");
3270 ifmgd
->auth_data
->tries
= 0;
3271 ifmgd
->auth_data
->timeout
= jiffies
;
3272 ifmgd
->auth_data
->timeout_started
= true;
3273 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3278 * This is the canonical list of information elements we care about,
3279 * the filter code also gives us all changes to the Microsoft OUI
3280 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3281 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3282 * changes to requested client power.
3284 * We implement beacon filtering in software since that means we can
3285 * avoid processing the frame here and in cfg80211, and userspace
3286 * will not be able to tell whether the hardware supports it or not.
3288 * XXX: This list needs to be dynamic -- userspace needs to be able to
3289 * add items it requires. It also needs to be able to tell us to
3290 * look out for other vendor IEs.
3292 static const u64 care_about_ies
=
3293 (1ULL << WLAN_EID_COUNTRY
) |
3294 (1ULL << WLAN_EID_ERP_INFO
) |
3295 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
3296 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
3297 (1ULL << WLAN_EID_HT_CAPABILITY
) |
3298 (1ULL << WLAN_EID_HT_OPERATION
) |
3299 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN
);
3301 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
3302 struct ieee80211_mgmt
*mgmt
, size_t len
,
3303 struct ieee80211_rx_status
*rx_status
)
3305 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3306 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
3308 struct ieee802_11_elems elems
;
3309 struct ieee80211_local
*local
= sdata
->local
;
3310 struct ieee80211_chanctx_conf
*chanctx_conf
;
3311 struct ieee80211_channel
*chan
;
3312 struct sta_info
*sta
;
3318 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3320 sdata_assert_lock(sdata
);
3322 /* Process beacon from the current BSS */
3323 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
3328 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3329 if (!chanctx_conf
) {
3334 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
3338 chan
= chanctx_conf
->def
.chan
;
3341 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
3342 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
3343 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
3344 len
- baselen
, false, &elems
);
3346 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3347 if (elems
.tim
&& !elems
.parse_error
) {
3348 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
3349 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
3351 ifmgd
->have_beacon
= true;
3352 ifmgd
->assoc_data
->need_beacon
= false;
3353 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3354 sdata
->vif
.bss_conf
.sync_tsf
=
3355 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3356 sdata
->vif
.bss_conf
.sync_device_ts
=
3357 rx_status
->device_timestamp
;
3359 sdata
->vif
.bss_conf
.sync_dtim_count
=
3360 elems
.tim
->dtim_count
;
3362 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3364 /* continue assoc process */
3365 ifmgd
->assoc_data
->timeout
= jiffies
;
3366 ifmgd
->assoc_data
->timeout_started
= true;
3367 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3371 if (!ifmgd
->associated
||
3372 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3374 bssid
= ifmgd
->associated
->bssid
;
3376 /* Track average RSSI from the Beacon frames of the current AP */
3377 ifmgd
->last_beacon_signal
= rx_status
->signal
;
3378 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3379 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3380 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
3381 ifmgd
->last_cqm_event_signal
= 0;
3382 ifmgd
->count_beacon_signal
= 1;
3383 ifmgd
->last_ave_beacon_signal
= 0;
3385 ifmgd
->ave_beacon_signal
=
3386 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
3387 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
3388 ifmgd
->ave_beacon_signal
) / 16;
3389 ifmgd
->count_beacon_signal
++;
3392 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3393 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3394 int sig
= ifmgd
->ave_beacon_signal
;
3395 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3396 struct ieee80211_event event
= {
3401 * if signal crosses either of the boundaries, invoke callback
3402 * with appropriate parameters
3404 if (sig
> ifmgd
->rssi_max_thold
&&
3405 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3406 ifmgd
->last_ave_beacon_signal
= sig
;
3407 event
.u
.rssi
.data
= RSSI_EVENT_HIGH
;
3408 drv_event_callback(local
, sdata
, &event
);
3409 } else if (sig
< ifmgd
->rssi_min_thold
&&
3410 (last_sig
>= ifmgd
->rssi_max_thold
||
3412 ifmgd
->last_ave_beacon_signal
= sig
;
3413 event
.u
.rssi
.data
= RSSI_EVENT_LOW
;
3414 drv_event_callback(local
, sdata
, &event
);
3418 if (bss_conf
->cqm_rssi_thold
&&
3419 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3420 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3421 int sig
= ifmgd
->ave_beacon_signal
/ 16;
3422 int last_event
= ifmgd
->last_cqm_event_signal
;
3423 int thold
= bss_conf
->cqm_rssi_thold
;
3424 int hyst
= bss_conf
->cqm_rssi_hyst
;
3426 (last_event
== 0 || sig
< last_event
- hyst
)) {
3427 ifmgd
->last_cqm_event_signal
= sig
;
3428 ieee80211_cqm_rssi_notify(
3430 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3432 } else if (sig
> thold
&&
3433 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3434 ifmgd
->last_cqm_event_signal
= sig
;
3435 ieee80211_cqm_rssi_notify(
3437 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3442 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
3443 mlme_dbg_ratelimited(sdata
,
3444 "cancelling AP probe due to a received beacon\n");
3445 ieee80211_reset_ap_probe(sdata
);
3449 * Push the beacon loss detection into the future since
3450 * we are processing a beacon from the AP just now.
3452 ieee80211_sta_reset_beacon_monitor(sdata
);
3454 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3455 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3456 len
- baselen
, false, &elems
,
3457 care_about_ies
, ncrc
);
3459 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
)) {
3460 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
3464 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3465 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3466 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3467 ieee80211_hw_config(local
,
3468 IEEE80211_CONF_CHANGE_PS
);
3470 ieee80211_send_nullfunc(local
, sdata
, 0);
3471 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3472 local
->pspolling
= true;
3475 * Here is assumed that the driver will be
3476 * able to send ps-poll frame and receive a
3477 * response even though power save mode is
3478 * enabled, but some drivers might require
3479 * to disable power save here. This needs
3480 * to be investigated.
3482 ieee80211_send_pspoll(local
, sdata
);
3487 if (sdata
->vif
.p2p
) {
3488 struct ieee80211_p2p_noa_attr noa
= {};
3491 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3493 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3494 (u8
*) &noa
, sizeof(noa
));
3496 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3497 /* valid noa_attr and index changed */
3498 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3499 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3500 changed
|= BSS_CHANGED_P2P_PS
;
3502 * make sure we update all information, the CRC
3503 * mechanism doesn't look at P2P attributes.
3505 ifmgd
->beacon_crc_valid
= false;
3507 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3508 /* noa_attr not found and we had valid noa_attr before */
3509 sdata
->u
.mgd
.p2p_noa_index
= -1;
3510 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3511 changed
|= BSS_CHANGED_P2P_PS
;
3512 ifmgd
->beacon_crc_valid
= false;
3516 if (ifmgd
->csa_waiting_bcn
)
3517 ieee80211_chswitch_post_beacon(sdata
);
3520 * Update beacon timing and dtim count on every beacon appearance. This
3521 * will allow the driver to use the most updated values. Do it before
3522 * comparing this one with last received beacon.
3523 * IMPORTANT: These parameters would possibly be out of sync by the time
3524 * the driver will use them. The synchronized view is currently
3525 * guaranteed only in certain callbacks.
3527 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3528 sdata
->vif
.bss_conf
.sync_tsf
=
3529 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3530 sdata
->vif
.bss_conf
.sync_device_ts
=
3531 rx_status
->device_timestamp
;
3533 sdata
->vif
.bss_conf
.sync_dtim_count
=
3534 elems
.tim
->dtim_count
;
3536 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3539 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3541 ifmgd
->beacon_crc
= ncrc
;
3542 ifmgd
->beacon_crc_valid
= true;
3544 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3546 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
3547 rx_status
->device_timestamp
,
3550 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
3551 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3552 elems
.wmm_param_len
))
3553 changed
|= BSS_CHANGED_QOS
;
3556 * If we haven't had a beacon before, tell the driver about the
3557 * DTIM period (and beacon timing if desired) now.
3559 if (!ifmgd
->have_beacon
) {
3560 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3562 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3564 bss_conf
->dtim_period
= 1;
3566 changed
|= BSS_CHANGED_BEACON_INFO
;
3567 ifmgd
->have_beacon
= true;
3569 mutex_lock(&local
->iflist_mtx
);
3570 ieee80211_recalc_ps(local
, -1);
3571 mutex_unlock(&local
->iflist_mtx
);
3573 ieee80211_recalc_ps_vif(sdata
);
3576 if (elems
.erp_info
) {
3578 erp_value
= elems
.erp_info
[0];
3582 changed
|= ieee80211_handle_bss_capability(sdata
,
3583 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3584 erp_valid
, erp_value
);
3586 mutex_lock(&local
->sta_mtx
);
3587 sta
= sta_info_get(sdata
, bssid
);
3589 if (ieee80211_config_bw(sdata
, sta
,
3590 elems
.ht_cap_elem
, elems
.ht_operation
,
3591 elems
.vht_operation
, bssid
, &changed
)) {
3592 mutex_unlock(&local
->sta_mtx
);
3593 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3594 WLAN_REASON_DEAUTH_LEAVING
,
3596 ieee80211_report_disconnect(sdata
, deauth_buf
,
3597 sizeof(deauth_buf
), true,
3598 WLAN_REASON_DEAUTH_LEAVING
);
3602 if (sta
&& elems
.opmode_notif
)
3603 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3604 rx_status
->band
, true);
3605 mutex_unlock(&local
->sta_mtx
);
3607 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
, mgmt
,
3609 elems
.country_elem_len
,
3610 elems
.pwr_constr_elem
,
3611 elems
.cisco_dtpc_elem
);
3613 ieee80211_bss_info_change_notify(sdata
, changed
);
3616 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3617 struct sk_buff
*skb
)
3619 struct ieee80211_rx_status
*rx_status
;
3620 struct ieee80211_mgmt
*mgmt
;
3622 struct ieee802_11_elems elems
;
3625 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3626 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3627 fc
= le16_to_cpu(mgmt
->frame_control
);
3631 switch (fc
& IEEE80211_FCTL_STYPE
) {
3632 case IEEE80211_STYPE_BEACON
:
3633 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3635 case IEEE80211_STYPE_PROBE_RESP
:
3636 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3638 case IEEE80211_STYPE_AUTH
:
3639 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3641 case IEEE80211_STYPE_DEAUTH
:
3642 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3644 case IEEE80211_STYPE_DISASSOC
:
3645 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3647 case IEEE80211_STYPE_ASSOC_RESP
:
3648 case IEEE80211_STYPE_REASSOC_RESP
:
3649 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3651 case IEEE80211_STYPE_ACTION
:
3652 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3653 ies_len
= skb
->len
-
3654 offsetof(struct ieee80211_mgmt
,
3655 u
.action
.u
.chan_switch
.variable
);
3660 ieee802_11_parse_elems(
3661 mgmt
->u
.action
.u
.chan_switch
.variable
,
3662 ies_len
, true, &elems
);
3664 if (elems
.parse_error
)
3667 ieee80211_sta_process_chanswitch(sdata
,
3669 rx_status
->device_timestamp
,
3671 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3672 ies_len
= skb
->len
-
3673 offsetof(struct ieee80211_mgmt
,
3674 u
.action
.u
.ext_chan_switch
.variable
);
3679 ieee802_11_parse_elems(
3680 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3681 ies_len
, true, &elems
);
3683 if (elems
.parse_error
)
3686 /* for the handling code pretend this was also an IE */
3687 elems
.ext_chansw_ie
=
3688 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3690 ieee80211_sta_process_chanswitch(sdata
,
3692 rx_status
->device_timestamp
,
3697 sdata_unlock(sdata
);
3700 static void ieee80211_sta_timer(unsigned long data
)
3702 struct ieee80211_sub_if_data
*sdata
=
3703 (struct ieee80211_sub_if_data
*) data
;
3705 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3708 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3709 u8
*bssid
, u8 reason
, bool tx
)
3711 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3713 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3716 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
3720 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3722 struct ieee80211_local
*local
= sdata
->local
;
3723 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3724 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3727 sdata_assert_lock(sdata
);
3729 if (WARN_ON_ONCE(!auth_data
))
3734 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3735 sdata_info(sdata
, "authentication with %pM timed out\n",
3736 auth_data
->bss
->bssid
);
3739 * Most likely AP is not in the range so remove the
3740 * bss struct for that AP.
3742 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3747 drv_mgd_prepare_tx(local
, sdata
);
3749 if (auth_data
->bss
->proberesp_ies
) {
3753 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3754 auth_data
->bss
->bssid
, auth_data
->tries
,
3755 IEEE80211_AUTH_MAX_TRIES
);
3757 auth_data
->expected_transaction
= 2;
3759 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3760 trans
= auth_data
->sae_trans
;
3761 status
= auth_data
->sae_status
;
3762 auth_data
->expected_transaction
= trans
;
3765 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3766 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3767 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3769 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3770 auth_data
->data
, auth_data
->data_len
,
3771 auth_data
->bss
->bssid
,
3772 auth_data
->bss
->bssid
, NULL
, 0, 0,
3777 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3778 auth_data
->bss
->bssid
, auth_data
->tries
,
3779 IEEE80211_AUTH_MAX_TRIES
);
3782 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3788 * Direct probe is sent to broadcast address as some APs
3789 * will not answer to direct packet in unassociated state.
3791 ieee80211_send_probe_req(sdata
, sdata
->vif
.addr
, NULL
,
3792 ssidie
+ 2, ssidie
[1],
3793 NULL
, 0, (u32
) -1, true, 0,
3794 auth_data
->bss
->channel
, false);
3798 if (tx_flags
== 0) {
3799 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3800 auth_data
->timeout_started
= true;
3801 run_again(sdata
, auth_data
->timeout
);
3803 auth_data
->timeout
=
3804 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3805 auth_data
->timeout_started
= true;
3806 run_again(sdata
, auth_data
->timeout
);
3812 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3814 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3815 struct ieee80211_local
*local
= sdata
->local
;
3817 sdata_assert_lock(sdata
);
3819 assoc_data
->tries
++;
3820 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3821 sdata_info(sdata
, "association with %pM timed out\n",
3822 assoc_data
->bss
->bssid
);
3825 * Most likely AP is not in the range so remove the
3826 * bss struct for that AP.
3828 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3833 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3834 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3835 IEEE80211_ASSOC_MAX_TRIES
);
3836 ieee80211_send_assoc(sdata
);
3838 if (!ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3839 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3840 assoc_data
->timeout_started
= true;
3841 run_again(sdata
, assoc_data
->timeout
);
3843 assoc_data
->timeout
=
3844 round_jiffies_up(jiffies
+
3845 IEEE80211_ASSOC_TIMEOUT_LONG
);
3846 assoc_data
->timeout_started
= true;
3847 run_again(sdata
, assoc_data
->timeout
);
3853 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3854 __le16 fc
, bool acked
)
3856 struct ieee80211_local
*local
= sdata
->local
;
3858 sdata
->u
.mgd
.status_fc
= fc
;
3859 sdata
->u
.mgd
.status_acked
= acked
;
3860 sdata
->u
.mgd
.status_received
= true;
3862 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3865 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3867 struct ieee80211_local
*local
= sdata
->local
;
3868 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3872 if (ifmgd
->status_received
) {
3873 __le16 fc
= ifmgd
->status_fc
;
3874 bool status_acked
= ifmgd
->status_acked
;
3876 ifmgd
->status_received
= false;
3877 if (ifmgd
->auth_data
&&
3878 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3880 ifmgd
->auth_data
->timeout
=
3881 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3882 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3884 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3886 ifmgd
->auth_data
->timeout_started
= true;
3887 } else if (ifmgd
->assoc_data
&&
3888 (ieee80211_is_assoc_req(fc
) ||
3889 ieee80211_is_reassoc_req(fc
))) {
3891 ifmgd
->assoc_data
->timeout
=
3892 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3893 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3895 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3897 ifmgd
->assoc_data
->timeout_started
= true;
3901 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3902 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3903 if (ifmgd
->auth_data
->done
) {
3905 * ok ... we waited for assoc but userspace didn't,
3906 * so let's just kill the auth data
3908 ieee80211_destroy_auth_data(sdata
, false);
3909 } else if (ieee80211_probe_auth(sdata
)) {
3911 struct ieee80211_event event
= {
3913 .u
.mlme
.data
= AUTH_EVENT
,
3914 .u
.mlme
.status
= MLME_TIMEOUT
,
3917 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3919 ieee80211_destroy_auth_data(sdata
, false);
3921 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3922 drv_event_callback(sdata
->local
, sdata
, &event
);
3924 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3925 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3927 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3928 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3929 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3930 ieee80211_do_assoc(sdata
)) {
3931 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3932 struct ieee80211_event event
= {
3934 .u
.mlme
.data
= ASSOC_EVENT
,
3935 .u
.mlme
.status
= MLME_TIMEOUT
,
3938 ieee80211_destroy_assoc_data(sdata
, false);
3939 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3940 drv_event_callback(sdata
->local
, sdata
, &event
);
3942 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3943 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3945 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3946 ifmgd
->associated
) {
3950 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3952 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3953 max_tries
= max_nullfunc_tries
;
3955 max_tries
= max_probe_tries
;
3957 /* ACK received for nullfunc probing frame */
3958 if (!ifmgd
->probe_send_count
)
3959 ieee80211_reset_ap_probe(sdata
);
3960 else if (ifmgd
->nullfunc_failed
) {
3961 if (ifmgd
->probe_send_count
< max_tries
) {
3963 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3964 bssid
, ifmgd
->probe_send_count
,
3966 ieee80211_mgd_probe_ap_send(sdata
);
3969 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3971 ieee80211_sta_connection_lost(sdata
, bssid
,
3972 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3975 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3976 run_again(sdata
, ifmgd
->probe_timeout
);
3977 else if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3979 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3980 bssid
, probe_wait_ms
);
3981 ieee80211_sta_connection_lost(sdata
, bssid
,
3982 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3983 } else if (ifmgd
->probe_send_count
< max_tries
) {
3985 "No probe response from AP %pM after %dms, try %d/%i\n",
3986 bssid
, probe_wait_ms
,
3987 ifmgd
->probe_send_count
, max_tries
);
3988 ieee80211_mgd_probe_ap_send(sdata
);
3991 * We actually lost the connection ... or did we?
3994 wiphy_debug(local
->hw
.wiphy
,
3995 "%s: No probe response from AP %pM"
3996 " after %dms, disconnecting.\n",
3998 bssid
, probe_wait_ms
);
4000 ieee80211_sta_connection_lost(sdata
, bssid
,
4001 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
4005 sdata_unlock(sdata
);
4008 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
4010 struct ieee80211_sub_if_data
*sdata
=
4011 (struct ieee80211_sub_if_data
*) data
;
4012 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4014 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
4017 sdata
->u
.mgd
.connection_loss
= false;
4018 ieee80211_queue_work(&sdata
->local
->hw
,
4019 &sdata
->u
.mgd
.beacon_connection_loss_work
);
4022 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
4024 struct ieee80211_sub_if_data
*sdata
=
4025 (struct ieee80211_sub_if_data
*) data
;
4026 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4027 struct ieee80211_local
*local
= sdata
->local
;
4029 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
4032 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
4035 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
4037 struct ieee80211_sub_if_data
*sdata
=
4038 container_of(work
, struct ieee80211_sub_if_data
,
4039 u
.mgd
.monitor_work
);
4041 ieee80211_mgd_probe_ap(sdata
, false);
4044 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
4046 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
4047 __ieee80211_stop_poll(sdata
);
4049 /* let's probe the connection once */
4050 if (!ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
4051 ieee80211_queue_work(&sdata
->local
->hw
,
4052 &sdata
->u
.mgd
.monitor_work
);
4053 /* and do all the other regular work too */
4054 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
4059 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data
*sdata
)
4061 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4062 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4066 if (ifmgd
->auth_data
|| ifmgd
->assoc_data
) {
4067 const u8
*bssid
= ifmgd
->auth_data
?
4068 ifmgd
->auth_data
->bss
->bssid
:
4069 ifmgd
->assoc_data
->bss
->bssid
;
4072 * If we are trying to authenticate / associate while suspending,
4073 * cfg80211 won't know and won't actually abort those attempts,
4074 * thus we need to do that ourselves.
4076 ieee80211_send_deauth_disassoc(sdata
, bssid
,
4077 IEEE80211_STYPE_DEAUTH
,
4078 WLAN_REASON_DEAUTH_LEAVING
,
4080 if (ifmgd
->assoc_data
)
4081 ieee80211_destroy_assoc_data(sdata
, false);
4082 if (ifmgd
->auth_data
)
4083 ieee80211_destroy_auth_data(sdata
, false);
4084 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4085 IEEE80211_DEAUTH_FRAME_LEN
);
4088 /* This is a bit of a hack - we should find a better and more generic
4089 * solution to this. Normally when suspending, cfg80211 will in fact
4090 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4091 * auth (not so important) or assoc (this is the problem) process.
4093 * As a consequence, it can happen that we are in the process of both
4094 * associating and suspending, and receive an association response
4095 * after cfg80211 has checked if it needs to disconnect, but before
4096 * we actually set the flag to drop incoming frames. This will then
4097 * cause the workqueue flush to process the association response in
4098 * the suspend, resulting in a successful association just before it
4099 * tries to remove the interface from the driver, which now though
4100 * has a channel context assigned ... this results in issues.
4102 * To work around this (for now) simply deauth here again if we're
4105 if (ifmgd
->associated
&& !sdata
->local
->wowlan
) {
4107 struct cfg80211_deauth_request req
= {
4108 .reason_code
= WLAN_REASON_DEAUTH_LEAVING
,
4112 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
4113 ieee80211_mgd_deauth(sdata
, &req
);
4116 sdata_unlock(sdata
);
4119 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
4121 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4124 if (!ifmgd
->associated
) {
4125 sdata_unlock(sdata
);
4129 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
4130 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
4131 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
4132 ieee80211_sta_connection_lost(sdata
,
4133 ifmgd
->associated
->bssid
,
4134 WLAN_REASON_UNSPECIFIED
,
4136 sdata_unlock(sdata
);
4139 sdata_unlock(sdata
);
4143 /* interface setup */
4144 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
4146 struct ieee80211_if_managed
*ifmgd
;
4148 ifmgd
= &sdata
->u
.mgd
;
4149 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
4150 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
4151 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
4152 ieee80211_beacon_connection_loss_work
);
4153 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
4154 ieee80211_csa_connection_drop_work
);
4155 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
4156 INIT_DELAYED_WORK(&ifmgd
->tdls_peer_del_work
,
4157 ieee80211_tdls_peer_del_work
);
4158 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
4159 (unsigned long) sdata
);
4160 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
4161 (unsigned long) sdata
);
4162 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
4163 (unsigned long) sdata
);
4164 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
4165 (unsigned long) sdata
);
4166 INIT_DELAYED_WORK(&ifmgd
->tx_tspec_wk
,
4167 ieee80211_sta_handle_tspec_ac_params_wk
);
4170 ifmgd
->powersave
= sdata
->wdev
.ps
;
4171 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
4172 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
4173 ifmgd
->p2p_noa_index
= -1;
4175 if (sdata
->local
->hw
.wiphy
->features
& NL80211_FEATURE_DYNAMIC_SMPS
)
4176 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
4178 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
4180 /* Setup TDLS data */
4181 spin_lock_init(&ifmgd
->teardown_lock
);
4182 ifmgd
->teardown_skb
= NULL
;
4183 ifmgd
->orig_teardown_skb
= NULL
;
4186 /* scan finished notification */
4187 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
4189 struct ieee80211_sub_if_data
*sdata
;
4191 /* Restart STA timers */
4193 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4194 if (ieee80211_sdata_running(sdata
))
4195 ieee80211_restart_sta_timer(sdata
);
4200 int ieee80211_max_network_latency(struct notifier_block
*nb
,
4201 unsigned long data
, void *dummy
)
4203 s32 latency_usec
= (s32
) data
;
4204 struct ieee80211_local
*local
=
4205 container_of(nb
, struct ieee80211_local
,
4206 network_latency_notifier
);
4208 mutex_lock(&local
->iflist_mtx
);
4209 ieee80211_recalc_ps(local
, latency_usec
);
4210 mutex_unlock(&local
->iflist_mtx
);
4215 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
4216 struct cfg80211_bss
*cbss
)
4218 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4219 const u8
*ht_cap_ie
, *vht_cap_ie
;
4220 const struct ieee80211_ht_cap
*ht_cap
;
4221 const struct ieee80211_vht_cap
*vht_cap
;
4224 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
4227 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4228 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
4229 ht_cap
= (void *)(ht_cap_ie
+ 2);
4230 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
4232 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4233 * "Tx Unequal Modulation Supported" fields.
4237 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
4240 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4241 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
4245 vht_cap
= (void *)(vht_cap_ie
+ 2);
4246 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
4247 for (nss
= 8; nss
> 0; nss
--) {
4248 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
4249 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
4252 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4253 chains
= max(chains
, nss
);
4259 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
4260 struct cfg80211_bss
*cbss
)
4262 struct ieee80211_local
*local
= sdata
->local
;
4263 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4264 const struct ieee80211_ht_cap
*ht_cap
= NULL
;
4265 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
4266 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
4267 struct ieee80211_supported_band
*sband
;
4268 struct cfg80211_chan_def chandef
;
4273 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4275 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
4276 IEEE80211_STA_DISABLE_80P80MHZ
|
4277 IEEE80211_STA_DISABLE_160MHZ
);
4281 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
4282 sband
->ht_cap
.ht_supported
) {
4283 const u8
*ht_oper_ie
, *ht_cap_ie
;
4285 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
4286 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
4287 ht_oper
= (void *)(ht_oper_ie
+ 2);
4289 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4290 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
))
4291 ht_cap
= (void *)(ht_cap_ie
+ 2);
4294 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4299 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4300 sband
->vht_cap
.vht_supported
) {
4301 const u8
*vht_oper_ie
, *vht_cap
;
4303 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
4304 WLAN_EID_VHT_OPERATION
);
4305 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
4306 vht_oper
= (void *)(vht_oper_ie
+ 2);
4307 if (vht_oper
&& !ht_oper
) {
4310 "AP advertised VHT without HT, disabling both\n");
4311 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4312 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4315 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4316 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
4317 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4322 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4324 for (i
= 0; i
< sband
->n_channels
; i
++) {
4325 if (sband
->channels
[i
].flags
& (IEEE80211_CHAN_DISABLED
|
4326 IEEE80211_CHAN_NO_80MHZ
))
4334 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4336 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
4338 ht_cap
, ht_oper
, vht_oper
,
4341 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
4346 /* will change later if needed */
4347 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4349 mutex_lock(&local
->mtx
);
4351 * If this fails (possibly due to channel context sharing
4352 * on incompatible channels, e.g. 80+80 and 160 sharing the
4353 * same control channel) try to use a smaller bandwidth.
4355 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4356 IEEE80211_CHANCTX_SHARED
);
4358 /* don't downgrade for 5 and 10 MHz channels, though. */
4359 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
4360 chandef
.width
== NL80211_CHAN_WIDTH_10
)
4363 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
4364 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
4365 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4366 IEEE80211_CHANCTX_SHARED
);
4369 mutex_unlock(&local
->mtx
);
4373 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
4374 struct cfg80211_bss
*cbss
, bool assoc
,
4377 struct ieee80211_local
*local
= sdata
->local
;
4378 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4379 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
4380 struct sta_info
*new_sta
= NULL
;
4381 struct ieee80211_supported_band
*sband
;
4382 bool have_sta
= false;
4385 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4387 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
4392 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
4397 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
4402 if (new_sta
|| override
) {
4403 err
= ieee80211_prep_channel(sdata
, cbss
);
4406 sta_info_free(local
, new_sta
);
4412 u32 rates
= 0, basic_rates
= 0;
4413 bool have_higher_than_11mbit
;
4414 int min_rate
= INT_MAX
, min_rate_index
= -1;
4415 struct ieee80211_chanctx_conf
*chanctx_conf
;
4416 const struct cfg80211_bss_ies
*ies
;
4417 int shift
= ieee80211_vif_get_shift(&sdata
->vif
);
4421 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4422 if (WARN_ON(!chanctx_conf
)) {
4424 sta_info_free(local
, new_sta
);
4427 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
4430 ieee80211_get_rates(sband
, bss
->supp_rates
,
4431 bss
->supp_rates_len
,
4432 &rates
, &basic_rates
,
4433 &have_higher_than_11mbit
,
4434 &min_rate
, &min_rate_index
,
4438 * This used to be a workaround for basic rates missing
4439 * in the association response frame. Now that we no
4440 * longer use the basic rates from there, it probably
4441 * doesn't happen any more, but keep the workaround so
4442 * in case some *other* APs are buggy in different ways
4443 * we can connect -- with a warning.
4445 if (!basic_rates
&& min_rate_index
>= 0) {
4447 "No basic rates, using min rate instead\n");
4448 basic_rates
= BIT(min_rate_index
);
4451 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
4452 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
4454 /* cf. IEEE 802.11 9.2.12 */
4455 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
4456 have_higher_than_11mbit
)
4457 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
4459 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
4461 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
4463 /* set timing information */
4464 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
4466 ies
= rcu_dereference(cbss
->beacon_ies
);
4470 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4471 sdata
->vif
.bss_conf
.sync_device_ts
=
4472 bss
->device_ts_beacon
;
4473 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4474 ies
->data
, ies
->len
);
4475 if (tim_ie
&& tim_ie
[1] >= 2)
4476 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
4478 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4479 } else if (!ieee80211_hw_check(&sdata
->local
->hw
,
4480 TIMING_BEACON_ONLY
)) {
4481 ies
= rcu_dereference(cbss
->proberesp_ies
);
4482 /* must be non-NULL since beacon IEs were NULL */
4483 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4484 sdata
->vif
.bss_conf
.sync_device_ts
=
4485 bss
->device_ts_presp
;
4486 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4488 sdata
->vif
.bss_conf
.sync_tsf
= 0;
4489 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
4490 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4494 /* tell driver about BSSID, basic rates and timing */
4495 ieee80211_bss_info_change_notify(sdata
,
4496 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
4497 BSS_CHANGED_BEACON_INT
);
4500 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
4502 err
= sta_info_insert(new_sta
);
4506 "failed to insert STA entry for the AP (error %d)\n",
4511 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4513 /* Cancel scan to ensure that nothing interferes with connection */
4514 if (local
->scanning
)
4515 ieee80211_scan_cancel(local
);
4521 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4522 struct cfg80211_auth_request
*req
)
4524 struct ieee80211_local
*local
= sdata
->local
;
4525 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4526 struct ieee80211_mgd_auth_data
*auth_data
;
4530 /* prepare auth data structure */
4532 switch (req
->auth_type
) {
4533 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4534 auth_alg
= WLAN_AUTH_OPEN
;
4536 case NL80211_AUTHTYPE_SHARED_KEY
:
4537 if (IS_ERR(local
->wep_tx_tfm
))
4539 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4541 case NL80211_AUTHTYPE_FT
:
4542 auth_alg
= WLAN_AUTH_FT
;
4544 case NL80211_AUTHTYPE_NETWORK_EAP
:
4545 auth_alg
= WLAN_AUTH_LEAP
;
4547 case NL80211_AUTHTYPE_SAE
:
4548 auth_alg
= WLAN_AUTH_SAE
;
4554 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4555 req
->ie_len
, GFP_KERNEL
);
4559 auth_data
->bss
= req
->bss
;
4561 if (req
->sae_data_len
>= 4) {
4562 __le16
*pos
= (__le16
*) req
->sae_data
;
4563 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4564 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4565 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4566 req
->sae_data_len
- 4);
4567 auth_data
->data_len
+= req
->sae_data_len
- 4;
4570 if (req
->ie
&& req
->ie_len
) {
4571 memcpy(&auth_data
->data
[auth_data
->data_len
],
4572 req
->ie
, req
->ie_len
);
4573 auth_data
->data_len
+= req
->ie_len
;
4576 if (req
->key
&& req
->key_len
) {
4577 auth_data
->key_len
= req
->key_len
;
4578 auth_data
->key_idx
= req
->key_idx
;
4579 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4582 auth_data
->algorithm
= auth_alg
;
4584 /* try to authenticate/probe */
4586 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4587 ifmgd
->assoc_data
) {
4592 if (ifmgd
->auth_data
)
4593 ieee80211_destroy_auth_data(sdata
, false);
4595 /* prep auth_data so we don't go into idle on disassoc */
4596 ifmgd
->auth_data
= auth_data
;
4598 if (ifmgd
->associated
) {
4599 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4601 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4602 WLAN_REASON_UNSPECIFIED
,
4605 ieee80211_report_disconnect(sdata
, frame_buf
,
4606 sizeof(frame_buf
), true,
4607 WLAN_REASON_UNSPECIFIED
);
4610 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4612 err
= ieee80211_prep_connection(sdata
, req
->bss
, false, false);
4616 err
= ieee80211_probe_auth(sdata
);
4618 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4622 /* hold our own reference */
4623 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4627 eth_zero_addr(ifmgd
->bssid
);
4628 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4629 ifmgd
->auth_data
= NULL
;
4630 mutex_lock(&sdata
->local
->mtx
);
4631 ieee80211_vif_release_channel(sdata
);
4632 mutex_unlock(&sdata
->local
->mtx
);
4638 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data
*sdata
,
4639 const u8
*wmm_param
, int len
)
4647 if (wmm_param
[5] != 1 /* version */)
4650 pos
= wmm_param
+ 8;
4653 for (; left
>= 4; left
-= 4, pos
+= 4) {
4654 u8 aifsn
= pos
[0] & 0x0f;
4655 u8 ecwmin
= pos
[1] & 0x0f;
4656 u8 ecwmax
= (pos
[1] & 0xf0) >> 4;
4657 int aci
= (pos
[0] >> 5) & 0x03;
4661 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4665 if (ecwmin
> ecwmax
) {
4667 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4668 ecwmin
, ecwmax
, aci
);
4676 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4677 struct cfg80211_assoc_request
*req
)
4679 struct ieee80211_local
*local
= sdata
->local
;
4680 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4681 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4682 struct ieee80211_mgd_assoc_data
*assoc_data
;
4683 const struct cfg80211_bss_ies
*beacon_ies
;
4684 struct ieee80211_supported_band
*sband
;
4685 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4687 bool override
= false;
4689 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4694 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4700 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4701 assoc_data
->ssid_len
= ssidie
[1];
4704 if (ifmgd
->associated
) {
4705 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4707 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4708 WLAN_REASON_UNSPECIFIED
,
4711 ieee80211_report_disconnect(sdata
, frame_buf
,
4712 sizeof(frame_buf
), true,
4713 WLAN_REASON_UNSPECIFIED
);
4716 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4721 if (ifmgd
->assoc_data
) {
4726 if (ifmgd
->auth_data
) {
4729 /* keep sta info, bssid if matching */
4730 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4731 ieee80211_destroy_auth_data(sdata
, match
);
4734 /* prepare assoc data */
4736 ifmgd
->beacon_crc_valid
= false;
4738 assoc_data
->wmm
= bss
->wmm_used
&&
4739 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4740 if (assoc_data
->wmm
) {
4741 /* try to check validity of WMM params IE */
4742 const struct cfg80211_bss_ies
*ies
;
4743 const u8
*wp
, *start
, *end
;
4746 ies
= rcu_dereference(req
->bss
->ies
);
4748 end
= start
+ ies
->len
;
4751 wp
= cfg80211_find_vendor_ie(
4753 WLAN_OUI_TYPE_MICROSOFT_WMM
,
4754 start
, end
- start
);
4757 start
= wp
+ wp
[1] + 2;
4758 /* if this IE is too short, try the next */
4761 /* if this IE is WMM params, we found what we wanted */
4766 if (!wp
|| !ieee80211_usable_wmm_params(sdata
, wp
+ 2,
4768 assoc_data
->wmm
= false;
4769 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
4775 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4776 * We still associate in non-HT mode (11a/b/g) if any one of these
4777 * ciphers is configured as pairwise.
4778 * We can set this to true for non-11n hardware, that'll be checked
4779 * separately along with the peer capabilities.
4781 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4782 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4783 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4784 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4785 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4786 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4787 netdev_info(sdata
->dev
,
4788 "disabling HT/VHT due to WEP/TKIP use\n");
4792 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4793 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4794 if (!sband
->ht_cap
.ht_supported
||
4795 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4796 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4797 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4798 if (!bss
->wmm_used
&&
4799 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4800 netdev_info(sdata
->dev
,
4801 "disabling HT as WMM/QoS is not supported by the AP\n");
4804 /* disable VHT if we don't support it or the AP doesn't use WMM */
4805 if (!sband
->vht_cap
.vht_supported
||
4806 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4807 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4808 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4809 if (!bss
->wmm_used
&&
4810 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4811 netdev_info(sdata
->dev
,
4812 "disabling VHT as WMM/QoS is not supported by the AP\n");
4815 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4816 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4817 sizeof(ifmgd
->ht_capa_mask
));
4819 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4820 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4821 sizeof(ifmgd
->vht_capa_mask
));
4823 if (req
->ie
&& req
->ie_len
) {
4824 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4825 assoc_data
->ie_len
= req
->ie_len
;
4828 assoc_data
->bss
= req
->bss
;
4830 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4831 if (ifmgd
->powersave
)
4832 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4834 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4836 sdata
->smps_mode
= ifmgd
->req_smps
;
4838 assoc_data
->capability
= req
->bss
->capability
;
4839 assoc_data
->supp_rates
= bss
->supp_rates
;
4840 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4843 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4844 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4845 assoc_data
->ap_ht_param
=
4846 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4848 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4849 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4850 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4851 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4852 sizeof(struct ieee80211_vht_cap
));
4854 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4857 if (WARN((sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
) &&
4858 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
),
4859 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4860 sdata
->vif
.driver_flags
&= ~IEEE80211_VIF_SUPPORTS_UAPSD
;
4862 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4863 (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
)) {
4864 assoc_data
->uapsd
= true;
4865 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4867 assoc_data
->uapsd
= false;
4868 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4871 if (req
->prev_bssid
)
4872 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4875 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4876 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4878 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4879 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4882 if (req
->flags
& ASSOC_REQ_USE_RRM
)
4883 ifmgd
->flags
|= IEEE80211_STA_ENABLE_RRM
;
4885 ifmgd
->flags
&= ~IEEE80211_STA_ENABLE_RRM
;
4887 if (req
->crypto
.control_port
)
4888 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4890 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4892 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4893 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4894 sdata
->encrypt_headroom
= ieee80211_cs_headroom(local
, &req
->crypto
,
4897 /* kick off associate process */
4899 ifmgd
->assoc_data
= assoc_data
;
4900 ifmgd
->dtim_period
= 0;
4901 ifmgd
->have_beacon
= false;
4903 /* override HT/VHT configuration only if the AP and we support it */
4904 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
4905 struct ieee80211_sta_ht_cap sta_ht_cap
;
4907 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
4910 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
4911 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
4913 /* check for 40 MHz disable override */
4914 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
) &&
4915 sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
4916 !(sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
4919 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4920 req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4924 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4925 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4926 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4929 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4930 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4932 err
= ieee80211_prep_connection(sdata
, req
->bss
, true, override
);
4937 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4939 if (ieee80211_hw_check(&sdata
->local
->hw
, NEED_DTIM_BEFORE_ASSOC
) &&
4942 * Wait up to one beacon interval ...
4943 * should this be more if we miss one?
4945 sdata_info(sdata
, "waiting for beacon from %pM\n",
4947 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4948 assoc_data
->timeout_started
= true;
4949 assoc_data
->need_beacon
= true;
4950 } else if (beacon_ies
) {
4951 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4956 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4957 const struct ieee80211_tim_ie
*tim
;
4958 tim
= (void *)(tim_ie
+ 2);
4959 ifmgd
->dtim_period
= tim
->dtim_period
;
4960 dtim_count
= tim
->dtim_count
;
4962 ifmgd
->have_beacon
= true;
4963 assoc_data
->timeout
= jiffies
;
4964 assoc_data
->timeout_started
= true;
4966 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
4967 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4968 sdata
->vif
.bss_conf
.sync_device_ts
=
4969 bss
->device_ts_beacon
;
4970 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4973 assoc_data
->timeout
= jiffies
;
4974 assoc_data
->timeout_started
= true;
4978 run_again(sdata
, assoc_data
->timeout
);
4980 if (bss
->corrupt_data
) {
4981 char *corrupt_type
= "data";
4982 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4983 if (bss
->corrupt_data
&
4984 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4985 corrupt_type
= "beacon and probe response";
4987 corrupt_type
= "beacon";
4988 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4989 corrupt_type
= "probe response";
4990 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4996 eth_zero_addr(ifmgd
->bssid
);
4997 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4998 ifmgd
->assoc_data
= NULL
;
5004 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
5005 struct cfg80211_deauth_request
*req
)
5007 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
5008 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
5009 bool tx
= !req
->local_state_change
;
5011 if (ifmgd
->auth_data
&&
5012 ether_addr_equal(ifmgd
->auth_data
->bss
->bssid
, req
->bssid
)) {
5014 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5015 req
->bssid
, req
->reason_code
,
5016 ieee80211_get_reason_code_string(req
->reason_code
));
5018 drv_mgd_prepare_tx(sdata
->local
, sdata
);
5019 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
5020 IEEE80211_STYPE_DEAUTH
,
5021 req
->reason_code
, tx
,
5023 ieee80211_destroy_auth_data(sdata
, false);
5024 ieee80211_report_disconnect(sdata
, frame_buf
,
5025 sizeof(frame_buf
), true,
5031 if (ifmgd
->associated
&&
5032 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
5034 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5035 req
->bssid
, req
->reason_code
,
5036 ieee80211_get_reason_code_string(req
->reason_code
));
5038 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
5039 req
->reason_code
, tx
, frame_buf
);
5040 ieee80211_report_disconnect(sdata
, frame_buf
,
5041 sizeof(frame_buf
), true,
5049 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
5050 struct cfg80211_disassoc_request
*req
)
5052 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
5054 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
5057 * cfg80211 should catch this ... but it's racy since
5058 * we can receive a disassoc frame, process it, hand it
5059 * to cfg80211 while that's in a locked section already
5060 * trying to tell us that the user wants to disconnect.
5062 if (ifmgd
->associated
!= req
->bss
)
5066 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5067 req
->bss
->bssid
, req
->reason_code
, ieee80211_get_reason_code_string(req
->reason_code
));
5069 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
5070 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
5071 req
->reason_code
, !req
->local_state_change
,
5074 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
5080 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
5082 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
5085 * Make sure some work items will not run after this,
5086 * they will not do anything but might not have been
5087 * cancelled when disconnecting.
5089 cancel_work_sync(&ifmgd
->monitor_work
);
5090 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
5091 cancel_work_sync(&ifmgd
->request_smps_work
);
5092 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
5093 cancel_work_sync(&ifmgd
->chswitch_work
);
5094 cancel_delayed_work_sync(&ifmgd
->tdls_peer_del_work
);
5097 if (ifmgd
->assoc_data
) {
5098 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
5099 ieee80211_destroy_assoc_data(sdata
, false);
5100 cfg80211_assoc_timeout(sdata
->dev
, bss
);
5102 if (ifmgd
->auth_data
)
5103 ieee80211_destroy_auth_data(sdata
, false);
5104 spin_lock_bh(&ifmgd
->teardown_lock
);
5105 if (ifmgd
->teardown_skb
) {
5106 kfree_skb(ifmgd
->teardown_skb
);
5107 ifmgd
->teardown_skb
= NULL
;
5108 ifmgd
->orig_teardown_skb
= NULL
;
5110 spin_unlock_bh(&ifmgd
->teardown_lock
);
5111 del_timer_sync(&ifmgd
->timer
);
5112 sdata_unlock(sdata
);
5115 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
5116 enum nl80211_cqm_rssi_threshold_event rssi_event
,
5119 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
5121 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
5123 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
5125 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
5127 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif
*vif
, gfp_t gfp
)
5129 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
5131 trace_api_cqm_beacon_loss_notify(sdata
->local
, sdata
);
5133 cfg80211_cqm_beacon_loss_notify(sdata
->dev
, gfp
);
5135 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify
);