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>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
43 static int max_nullfunc_tries
= 2;
44 module_param(max_nullfunc_tries
, int, 0644);
45 MODULE_PARM_DESC(max_nullfunc_tries
,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48 static int max_probe_tries
= 5;
49 module_param(max_probe_tries
, int, 0644);
50 MODULE_PARM_DESC(max_probe_tries
,
51 "Maximum probe tries before disconnecting (reason 4).");
54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
61 static int beacon_loss_count
= 7;
62 module_param(beacon_loss_count
, int, 0644);
63 MODULE_PARM_DESC(beacon_loss_count
,
64 "Number of beacon intervals before we decide beacon was lost.");
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
76 static int probe_wait_ms
= 500;
77 module_param(probe_wait_ms
, int, 0644);
78 MODULE_PARM_DESC(probe_wait_ms
,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
105 static void run_again(struct ieee80211_sub_if_data
*sdata
,
106 unsigned long timeout
)
108 sdata_assert_lock(sdata
);
110 if (!timer_pending(&sdata
->u
.mgd
.timer
) ||
111 time_before(timeout
, sdata
->u
.mgd
.timer
.expires
))
112 mod_timer(&sdata
->u
.mgd
.timer
, timeout
);
115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
117 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
120 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
123 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
124 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
131 if (unlikely(!sdata
->u
.mgd
.associated
))
134 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
137 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
138 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
140 ifmgd
->probe_send_count
= 0;
143 static int ecw2cw(int ecw
)
145 return (1 << ecw
) - 1;
149 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
150 struct ieee80211_supported_band
*sband
,
151 struct ieee80211_channel
*channel
,
152 const struct ieee80211_ht_operation
*ht_oper
,
153 const struct ieee80211_vht_operation
*vht_oper
,
154 struct cfg80211_chan_def
*chandef
, bool tracking
)
156 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
157 struct cfg80211_chan_def vht_chandef
;
160 chandef
->chan
= channel
;
161 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
162 chandef
->center_freq1
= channel
->center_freq
;
163 chandef
->center_freq2
= 0;
165 if (!ht_oper
|| !sband
->ht_cap
.ht_supported
) {
166 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
170 chandef
->width
= NL80211_CHAN_WIDTH_20
;
172 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
174 /* check that channel matches the right operating channel */
175 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel
->center_freq
, ht_cfreq
,
186 ht_oper
->primary_chan
, channel
->band
);
187 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
191 /* check 40 MHz support, if we have it */
192 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
193 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
195 chandef
->width
= NL80211_CHAN_WIDTH_40
;
196 chandef
->center_freq1
+= 10;
198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
199 chandef
->width
= NL80211_CHAN_WIDTH_40
;
200 chandef
->center_freq1
-= 10;
204 /* 40 MHz (and 80 MHz) must be supported for VHT */
205 ret
= IEEE80211_STA_DISABLE_VHT
;
206 /* also mark 40 MHz disabled */
207 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
211 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
212 ret
= IEEE80211_STA_DISABLE_VHT
;
216 vht_chandef
.chan
= channel
;
217 vht_chandef
.center_freq1
=
218 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
220 vht_chandef
.center_freq2
= 0;
222 switch (vht_oper
->chan_width
) {
223 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
224 vht_chandef
.width
= chandef
->width
;
225 vht_chandef
.center_freq1
= chandef
->center_freq1
;
227 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
228 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
230 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
231 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
233 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
234 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
235 vht_chandef
.center_freq2
=
236 ieee80211_channel_to_frequency(
237 vht_oper
->center_freq_seg2_idx
,
241 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
243 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
244 vht_oper
->chan_width
);
245 ret
= IEEE80211_STA_DISABLE_VHT
;
249 if (!cfg80211_chandef_valid(&vht_chandef
)) {
250 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
252 "AP VHT information is invalid, disable VHT\n");
253 ret
= IEEE80211_STA_DISABLE_VHT
;
257 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
262 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
263 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
265 "AP VHT information doesn't match HT, disable VHT\n");
266 ret
= IEEE80211_STA_DISABLE_VHT
;
270 *chandef
= vht_chandef
;
276 * When tracking the current AP, don't do any further checks if the
277 * new chandef is identical to the one we're currently using for the
278 * connection. This keeps us from playing ping-pong with regulatory,
279 * without it the following can happen (for example):
280 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
281 * - AP advertises regdom US
282 * - CRDA loads regdom US with 80 MHz prohibited (old database)
283 * - the code below detects an unsupported channel, downgrades, and
284 * we disconnect from the AP in the caller
285 * - disconnect causes CRDA to reload world regdomain and the game
287 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
289 * It seems possible that there are still scenarios with CSA or real
290 * bandwidth changes where a this could happen, but those cases are
291 * less common and wouldn't completely prevent using the AP.
294 cfg80211_chandef_identical(chandef
, &sdata
->vif
.bss_conf
.chandef
))
297 /* don't print the message below for VHT mismatch if VHT is disabled */
298 if (ret
& IEEE80211_STA_DISABLE_VHT
)
299 vht_chandef
= *chandef
;
302 * Ignore the DISABLED flag when we're already connected and only
303 * tracking the APs beacon for bandwidth changes - otherwise we
304 * might get disconnected here if we connect to an AP, update our
305 * regulatory information based on the AP's country IE and the
306 * information we have is wrong/outdated and disables the channel
307 * that we're actually using for the connection to the AP.
309 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
311 IEEE80211_CHAN_DISABLED
)) {
312 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
313 ret
= IEEE80211_STA_DISABLE_HT
|
314 IEEE80211_STA_DISABLE_VHT
;
318 ret
|= ieee80211_chandef_downgrade(chandef
);
321 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
323 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
325 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
329 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
330 struct sta_info
*sta
,
331 const struct ieee80211_ht_operation
*ht_oper
,
332 const struct ieee80211_vht_operation
*vht_oper
,
333 const u8
*bssid
, u32
*changed
)
335 struct ieee80211_local
*local
= sdata
->local
;
336 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
337 struct ieee80211_supported_band
*sband
;
338 struct ieee80211_channel
*chan
;
339 struct cfg80211_chan_def chandef
;
342 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
345 /* if HT was/is disabled, don't track any bandwidth changes */
346 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
349 /* don't check VHT if we associated as non-VHT station */
350 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
353 if (WARN_ON_ONCE(!sta
))
357 * if bss configuration changed store the new one -
358 * this may be applicable even if channel is identical
360 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
361 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
362 *changed
|= BSS_CHANGED_HT
;
363 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
366 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
367 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
369 /* calculate new channel (type) based on HT/VHT operation IEs */
370 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
, ht_oper
,
371 vht_oper
, &chandef
, true);
374 * Downgrade the new channel if we associated with restricted
375 * capabilities. For example, if we associated as a 20 MHz STA
376 * to a 40 MHz AP (due to regulatory, capabilities or config
377 * reasons) then switching to a 40 MHz channel now won't do us
378 * any good -- we couldn't use it with the AP.
380 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
381 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
382 flags
|= ieee80211_chandef_downgrade(&chandef
);
383 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
384 chandef
.width
== NL80211_CHAN_WIDTH_160
)
385 flags
|= ieee80211_chandef_downgrade(&chandef
);
386 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
387 chandef
.width
> NL80211_CHAN_WIDTH_20
)
388 flags
|= ieee80211_chandef_downgrade(&chandef
);
390 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
394 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
395 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
396 chandef
.center_freq1
, chandef
.center_freq2
);
398 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
399 IEEE80211_STA_DISABLE_VHT
|
400 IEEE80211_STA_DISABLE_40MHZ
|
401 IEEE80211_STA_DISABLE_80P80MHZ
|
402 IEEE80211_STA_DISABLE_160MHZ
)) ||
403 !cfg80211_chandef_valid(&chandef
)) {
405 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
410 switch (chandef
.width
) {
411 case NL80211_CHAN_WIDTH_20_NOHT
:
412 case NL80211_CHAN_WIDTH_20
:
413 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
415 case NL80211_CHAN_WIDTH_40
:
416 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
418 case NL80211_CHAN_WIDTH_80
:
419 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
421 case NL80211_CHAN_WIDTH_80P80
:
422 case NL80211_CHAN_WIDTH_160
:
423 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
429 if (new_sta_bw
> sta
->cur_max_bandwidth
)
430 new_sta_bw
= sta
->cur_max_bandwidth
;
432 if (new_sta_bw
< sta
->sta
.bandwidth
) {
433 sta
->sta
.bandwidth
= new_sta_bw
;
434 rate_control_rate_update(local
, sband
, sta
,
435 IEEE80211_RC_BW_CHANGED
);
438 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
441 "AP %pM changed bandwidth to incompatible one - disconnect\n",
446 if (new_sta_bw
> sta
->sta
.bandwidth
) {
447 sta
->sta
.bandwidth
= new_sta_bw
;
448 rate_control_rate_update(local
, sband
, sta
,
449 IEEE80211_RC_BW_CHANGED
);
455 /* frame sending functions */
457 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
458 struct sk_buff
*skb
, u8 ap_ht_param
,
459 struct ieee80211_supported_band
*sband
,
460 struct ieee80211_channel
*channel
,
461 enum ieee80211_smps_mode smps
)
464 u32 flags
= channel
->flags
;
466 struct ieee80211_sta_ht_cap ht_cap
;
468 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
470 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
471 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
473 /* determine capability flags */
476 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
477 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
478 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
479 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
480 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
483 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
484 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
485 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
486 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
492 * If 40 MHz was disabled associate as though we weren't
493 * capable of 40 MHz -- some broken APs will never fall
494 * back to trying to transmit in 20 MHz.
496 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
497 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
498 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
501 /* set SM PS mode properly */
502 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
504 case IEEE80211_SMPS_AUTOMATIC
:
505 case IEEE80211_SMPS_NUM_MODES
:
507 case IEEE80211_SMPS_OFF
:
508 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
509 IEEE80211_HT_CAP_SM_PS_SHIFT
;
511 case IEEE80211_SMPS_STATIC
:
512 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
513 IEEE80211_HT_CAP_SM_PS_SHIFT
;
515 case IEEE80211_SMPS_DYNAMIC
:
516 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
517 IEEE80211_HT_CAP_SM_PS_SHIFT
;
521 /* reserve and fill IE */
522 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
523 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
528 struct ieee80211_supported_band
*sband
,
529 struct ieee80211_vht_cap
*ap_vht_cap
)
533 struct ieee80211_sta_vht_cap vht_cap
;
535 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
537 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
538 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
540 /* determine capability flags */
543 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
544 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
;
545 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
548 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
549 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
550 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
554 * Some APs apparently get confused if our capabilities are better
555 * than theirs, so restrict what we advertise in the assoc request.
557 if (!(ap_vht_cap
->vht_cap_info
&
558 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
559 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
561 /* reserve and fill IE */
562 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
563 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
566 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
568 struct ieee80211_local
*local
= sdata
->local
;
569 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
570 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
572 struct ieee80211_mgmt
*mgmt
;
574 size_t offset
= 0, noffset
;
575 int i
, count
, rates_len
, supp_rates_len
, shift
;
577 struct ieee80211_supported_band
*sband
;
578 struct ieee80211_chanctx_conf
*chanctx_conf
;
579 struct ieee80211_channel
*chan
;
580 u32 rate_flags
, rates
= 0;
582 sdata_assert_lock(sdata
);
585 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
586 if (WARN_ON(!chanctx_conf
)) {
590 chan
= chanctx_conf
->def
.chan
;
591 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
593 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
594 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
596 if (assoc_data
->supp_rates_len
) {
598 * Get all rates supported by the device and the AP as
599 * some APs don't like getting a superset of their rates
600 * in the association request (e.g. D-Link DAP 1353 in
603 rates_len
= ieee80211_parse_bitrates(&chanctx_conf
->def
, sband
,
604 assoc_data
->supp_rates
,
605 assoc_data
->supp_rates_len
,
609 * In case AP not provide any supported rates information
610 * before association, we send information element(s) with
611 * all rates that we support.
614 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
615 if ((rate_flags
& sband
->bitrates
[i
].flags
)
623 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
624 sizeof(*mgmt
) + /* bit too much but doesn't matter */
625 2 + assoc_data
->ssid_len
+ /* SSID */
626 4 + rates_len
+ /* (extended) rates */
627 4 + /* power capability */
628 2 + 2 * sband
->n_channels
+ /* supported channels */
629 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
630 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
631 assoc_data
->ie_len
+ /* extra IEs */
637 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
639 capab
= WLAN_CAPABILITY_ESS
;
641 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
642 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
643 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
644 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
645 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
648 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
649 capab
|= WLAN_CAPABILITY_PRIVACY
;
651 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
652 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
653 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
655 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
657 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
658 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
659 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
661 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
663 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
664 IEEE80211_STYPE_REASSOC_REQ
);
665 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
666 mgmt
->u
.reassoc_req
.listen_interval
=
667 cpu_to_le16(local
->hw
.conf
.listen_interval
);
668 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
672 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
673 IEEE80211_STYPE_ASSOC_REQ
);
674 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
675 mgmt
->u
.assoc_req
.listen_interval
=
676 cpu_to_le16(local
->hw
.conf
.listen_interval
);
680 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
681 *pos
++ = WLAN_EID_SSID
;
682 *pos
++ = assoc_data
->ssid_len
;
683 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
685 /* add all rates which were marked to be used above */
686 supp_rates_len
= rates_len
;
687 if (supp_rates_len
> 8)
690 pos
= skb_put(skb
, supp_rates_len
+ 2);
691 *pos
++ = WLAN_EID_SUPP_RATES
;
692 *pos
++ = supp_rates_len
;
695 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
696 if (BIT(i
) & rates
) {
697 int rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
705 if (rates_len
> count
) {
706 pos
= skb_put(skb
, rates_len
- count
+ 2);
707 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
708 *pos
++ = rates_len
- count
;
710 for (i
++; i
< sband
->n_bitrates
; i
++) {
711 if (BIT(i
) & rates
) {
713 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
720 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
721 /* 1. power capabilities */
722 pos
= skb_put(skb
, 4);
723 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
725 *pos
++ = 0; /* min tx power */
727 *pos
++ = ieee80211_chandef_max_power(&chanctx_conf
->def
);
729 /* 2. supported channels */
730 /* TODO: get this in reg domain format */
731 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
732 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
733 *pos
++ = 2 * sband
->n_channels
;
734 for (i
= 0; i
< sband
->n_channels
; i
++) {
735 *pos
++ = ieee80211_frequency_to_channel(
736 sband
->channels
[i
].center_freq
);
737 *pos
++ = 1; /* one channel in the subband*/
741 /* if present, add any custom IEs that go before HT */
742 if (assoc_data
->ie_len
) {
743 static const u8 before_ht
[] = {
746 WLAN_EID_EXT_SUPP_RATES
,
747 WLAN_EID_PWR_CAPABILITY
,
748 WLAN_EID_SUPPORTED_CHANNELS
,
751 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
752 WLAN_EID_MOBILITY_DOMAIN
,
753 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
755 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
756 before_ht
, ARRAY_SIZE(before_ht
),
758 pos
= skb_put(skb
, noffset
- offset
);
759 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
763 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
764 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
765 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
767 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
768 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
769 sband
, chan
, sdata
->smps_mode
);
771 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
772 ieee80211_add_vht_ie(sdata
, skb
, sband
,
773 &assoc_data
->ap_vht_cap
);
775 /* if present, add any custom non-vendor IEs that go after HT */
776 if (assoc_data
->ie_len
) {
777 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
780 pos
= skb_put(skb
, noffset
- offset
);
781 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
785 if (assoc_data
->wmm
) {
786 if (assoc_data
->uapsd
) {
787 qos_info
= ifmgd
->uapsd_queues
;
788 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
789 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
794 pos
= skb_put(skb
, 9);
795 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
796 *pos
++ = 7; /* len */
797 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
800 *pos
++ = 2; /* WME */
801 *pos
++ = 0; /* WME info */
802 *pos
++ = 1; /* WME ver */
806 /* add any remaining custom (i.e. vendor specific here) IEs */
807 if (assoc_data
->ie_len
) {
808 noffset
= assoc_data
->ie_len
;
809 pos
= skb_put(skb
, noffset
- offset
);
810 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
813 drv_mgd_prepare_tx(local
, sdata
);
815 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
816 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
817 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
818 IEEE80211_TX_INTFL_MLME_CONN_TX
;
819 ieee80211_tx_skb(sdata
, skb
);
822 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
823 struct ieee80211_sub_if_data
*sdata
)
825 struct ieee80211_pspoll
*pspoll
;
828 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
832 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
833 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
835 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
836 ieee80211_tx_skb(sdata
, skb
);
839 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
840 struct ieee80211_sub_if_data
*sdata
,
844 struct ieee80211_hdr_3addr
*nullfunc
;
845 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
847 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
851 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
853 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
855 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
856 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
858 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
859 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
861 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
862 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
864 ieee80211_tx_skb(sdata
, skb
);
867 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
868 struct ieee80211_sub_if_data
*sdata
)
871 struct ieee80211_hdr
*nullfunc
;
874 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
877 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
881 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
883 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
884 memset(nullfunc
, 0, 30);
885 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
886 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
887 nullfunc
->frame_control
= fc
;
888 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
889 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
890 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
891 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
893 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
894 ieee80211_tx_skb(sdata
, skb
);
897 /* spectrum management related things */
898 static void ieee80211_chswitch_work(struct work_struct
*work
)
900 struct ieee80211_sub_if_data
*sdata
=
901 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
902 struct ieee80211_local
*local
= sdata
->local
;
903 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
907 if (!ieee80211_sdata_running(sdata
))
911 if (!ifmgd
->associated
)
914 mutex_lock(&local
->mtx
);
915 ret
= ieee80211_vif_change_channel(sdata
, &changed
);
916 mutex_unlock(&local
->mtx
);
919 "vif channel switch failed, disconnecting\n");
920 ieee80211_queue_work(&sdata
->local
->hw
,
921 &ifmgd
->csa_connection_drop_work
);
925 if (!local
->use_chanctx
) {
926 local
->_oper_chandef
= sdata
->csa_chandef
;
927 /* Call "hw_config" only if doing sw channel switch.
928 * Otherwise update the channel directly
930 if (!local
->ops
->channel_switch
)
931 ieee80211_hw_config(local
, 0);
933 local
->hw
.conf
.chandef
= local
->_oper_chandef
;
936 /* XXX: shouldn't really modify cfg80211-owned data! */
937 ifmgd
->associated
->channel
= sdata
->csa_chandef
.chan
;
939 /* XXX: wait for a beacon first? */
940 ieee80211_wake_queues_by_reason(&local
->hw
,
941 IEEE80211_MAX_QUEUE_MAP
,
942 IEEE80211_QUEUE_STOP_REASON_CSA
);
944 ieee80211_bss_info_change_notify(sdata
, changed
);
947 sdata
->vif
.csa_active
= false;
948 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
952 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
954 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
955 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
957 trace_api_chswitch_done(sdata
, success
);
960 "driver channel switch failed, disconnecting\n");
961 ieee80211_queue_work(&sdata
->local
->hw
,
962 &ifmgd
->csa_connection_drop_work
);
964 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
967 EXPORT_SYMBOL(ieee80211_chswitch_done
);
969 static void ieee80211_chswitch_timer(unsigned long data
)
971 struct ieee80211_sub_if_data
*sdata
=
972 (struct ieee80211_sub_if_data
*) data
;
974 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
978 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
979 u64 timestamp
, struct ieee802_11_elems
*elems
,
982 struct ieee80211_local
*local
= sdata
->local
;
983 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
984 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
985 struct ieee80211_chanctx
*chanctx
;
986 enum ieee80211_band current_band
;
987 struct ieee80211_csa_ie csa_ie
;
990 sdata_assert_lock(sdata
);
998 /* disregard subsequent announcements if we are already processing */
999 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
1002 current_band
= cbss
->channel
->band
;
1003 memset(&csa_ie
, 0, sizeof(csa_ie
));
1004 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, beacon
, current_band
,
1006 ifmgd
->associated
->bssid
, &csa_ie
);
1008 ieee80211_queue_work(&local
->hw
,
1009 &ifmgd
->csa_connection_drop_work
);
1013 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
1014 IEEE80211_CHAN_DISABLED
)) {
1016 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1017 ifmgd
->associated
->bssid
,
1018 csa_ie
.chandef
.chan
->center_freq
,
1019 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
1020 csa_ie
.chandef
.center_freq2
);
1021 ieee80211_queue_work(&local
->hw
,
1022 &ifmgd
->csa_connection_drop_work
);
1026 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
1027 sdata
->vif
.csa_active
= true;
1029 mutex_lock(&local
->chanctx_mtx
);
1030 if (local
->use_chanctx
) {
1031 u32 num_chanctx
= 0;
1032 list_for_each_entry(chanctx
, &local
->chanctx_list
, list
)
1035 if (num_chanctx
> 1 ||
1036 !(local
->hw
.flags
& IEEE80211_HW_CHANCTX_STA_CSA
)) {
1038 "not handling chan-switch with channel contexts\n");
1039 ieee80211_queue_work(&local
->hw
,
1040 &ifmgd
->csa_connection_drop_work
);
1041 mutex_unlock(&local
->chanctx_mtx
);
1046 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
1047 ieee80211_queue_work(&local
->hw
,
1048 &ifmgd
->csa_connection_drop_work
);
1049 mutex_unlock(&local
->chanctx_mtx
);
1052 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
1053 struct ieee80211_chanctx
, conf
);
1054 if (chanctx
->refcount
> 1) {
1056 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1057 ieee80211_queue_work(&local
->hw
,
1058 &ifmgd
->csa_connection_drop_work
);
1059 mutex_unlock(&local
->chanctx_mtx
);
1062 mutex_unlock(&local
->chanctx_mtx
);
1064 sdata
->csa_chandef
= csa_ie
.chandef
;
1067 ieee80211_stop_queues_by_reason(&local
->hw
,
1068 IEEE80211_MAX_QUEUE_MAP
,
1069 IEEE80211_QUEUE_STOP_REASON_CSA
);
1071 if (local
->ops
->channel_switch
) {
1072 /* use driver's channel switch callback */
1073 struct ieee80211_channel_switch ch_switch
= {
1074 .timestamp
= timestamp
,
1075 .block_tx
= csa_ie
.mode
,
1076 .chandef
= csa_ie
.chandef
,
1077 .count
= csa_ie
.count
,
1080 drv_channel_switch(local
, &ch_switch
);
1084 /* channel switch handled in software */
1085 if (csa_ie
.count
<= 1)
1086 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1088 mod_timer(&ifmgd
->chswitch_timer
,
1089 TU_TO_EXP_TIME(csa_ie
.count
* cbss
->beacon_interval
));
1092 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1093 struct ieee80211_channel
*channel
,
1094 const u8
*country_ie
, u8 country_ie_len
,
1095 const u8
*pwr_constr_elem
)
1097 struct ieee80211_country_ie_triplet
*triplet
;
1098 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1099 int i
, chan_pwr
, chan_increment
, new_ap_level
;
1100 bool have_chan_pwr
= false;
1103 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1106 triplet
= (void *)(country_ie
+ 3);
1107 country_ie_len
-= 3;
1109 switch (channel
->band
) {
1113 case IEEE80211_BAND_2GHZ
:
1114 case IEEE80211_BAND_60GHZ
:
1117 case IEEE80211_BAND_5GHZ
:
1123 while (country_ie_len
>= 3) {
1124 u8 first_channel
= triplet
->chans
.first_channel
;
1126 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1129 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1130 if (first_channel
+ i
* chan_increment
== chan
) {
1131 have_chan_pwr
= true;
1132 chan_pwr
= triplet
->chans
.max_power
;
1141 country_ie_len
-= 3;
1147 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
1149 if (sdata
->ap_power_level
== new_ap_level
)
1153 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1154 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
1155 sdata
->u
.mgd
.bssid
);
1156 sdata
->ap_power_level
= new_ap_level
;
1157 if (__ieee80211_recalc_txpower(sdata
))
1158 return BSS_CHANGED_TXPOWER
;
1163 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1164 struct ieee80211_sub_if_data
*sdata
)
1166 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1169 * If we are scanning right now then the parameters will
1170 * take effect when scan finishes.
1172 if (local
->scanning
)
1175 if (conf
->dynamic_ps_timeout
> 0 &&
1176 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1177 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1178 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1180 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1181 ieee80211_send_nullfunc(local
, sdata
, 1);
1183 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1184 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1187 conf
->flags
|= IEEE80211_CONF_PS
;
1188 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1192 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1194 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1196 if (local
->ps_sdata
) {
1197 ieee80211_enable_ps(local
, local
->ps_sdata
);
1198 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1199 conf
->flags
&= ~IEEE80211_CONF_PS
;
1200 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1201 del_timer_sync(&local
->dynamic_ps_timer
);
1202 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1206 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1208 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1209 struct sta_info
*sta
= NULL
;
1210 bool authorized
= false;
1212 if (!mgd
->powersave
)
1218 if (!mgd
->associated
)
1221 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1224 if (!mgd
->have_beacon
)
1228 sta
= sta_info_get(sdata
, mgd
->bssid
);
1230 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1236 /* need to hold RTNL or interface lock */
1237 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1239 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1243 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1244 local
->ps_sdata
= NULL
;
1248 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1249 if (!ieee80211_sdata_running(sdata
))
1251 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1252 /* If an AP vif is found, then disable PS
1253 * by setting the count to zero thereby setting
1259 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1265 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1269 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1271 beaconint_us
= ieee80211_tu_to_usec(
1272 found
->vif
.bss_conf
.beacon_int
);
1274 timeout
= local
->dynamic_ps_forced_timeout
;
1277 * Go to full PSM if the user configures a very low
1278 * latency requirement.
1279 * The 2000 second value is there for compatibility
1280 * until the PM_QOS_NETWORK_LATENCY is configured
1283 if (latency
> (1900 * USEC_PER_MSEC
) &&
1284 latency
!= (2000 * USEC_PER_SEC
))
1289 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1291 if (beaconint_us
> latency
) {
1292 local
->ps_sdata
= NULL
;
1295 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1297 /* If the TIM IE is invalid, pretend the value is 1 */
1300 else if (dtimper
> 1)
1301 maxslp
= min_t(int, dtimper
,
1302 latency
/ beaconint_us
);
1304 local
->hw
.conf
.max_sleep_period
= maxslp
;
1305 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1306 local
->ps_sdata
= found
;
1309 local
->ps_sdata
= NULL
;
1312 ieee80211_change_ps(local
);
1315 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1317 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1319 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1320 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1321 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1325 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1327 struct ieee80211_local
*local
=
1328 container_of(work
, struct ieee80211_local
,
1329 dynamic_ps_disable_work
);
1331 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1332 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1333 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1336 ieee80211_wake_queues_by_reason(&local
->hw
,
1337 IEEE80211_MAX_QUEUE_MAP
,
1338 IEEE80211_QUEUE_STOP_REASON_PS
);
1341 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1343 struct ieee80211_local
*local
=
1344 container_of(work
, struct ieee80211_local
,
1345 dynamic_ps_enable_work
);
1346 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1347 struct ieee80211_if_managed
*ifmgd
;
1348 unsigned long flags
;
1351 /* can only happen when PS was just disabled anyway */
1355 ifmgd
= &sdata
->u
.mgd
;
1357 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1360 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1361 /* don't enter PS if TX frames are pending */
1362 if (drv_tx_frames_pending(local
)) {
1363 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1365 local
->hw
.conf
.dynamic_ps_timeout
));
1370 * transmission can be stopped by others which leads to
1371 * dynamic_ps_timer expiry. Postpone the ps timer if it
1372 * is not the actual idle state.
1374 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1375 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1376 if (local
->queue_stop_reasons
[q
]) {
1377 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1379 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1381 local
->hw
.conf
.dynamic_ps_timeout
));
1385 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1388 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1389 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1390 if (drv_tx_frames_pending(local
)) {
1391 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1393 local
->hw
.conf
.dynamic_ps_timeout
));
1395 ieee80211_send_nullfunc(local
, sdata
, 1);
1396 /* Flush to get the tx status of nullfunc frame */
1397 ieee80211_flush_queues(local
, sdata
);
1401 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1402 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1403 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1404 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1405 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1406 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1410 void ieee80211_dynamic_ps_timer(unsigned long data
)
1412 struct ieee80211_local
*local
= (void *) data
;
1414 if (local
->quiescing
|| local
->suspended
)
1417 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1420 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1422 struct delayed_work
*delayed_work
=
1423 container_of(work
, struct delayed_work
, work
);
1424 struct ieee80211_sub_if_data
*sdata
=
1425 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1426 dfs_cac_timer_work
);
1427 struct cfg80211_chan_def chandef
= sdata
->vif
.bss_conf
.chandef
;
1429 mutex_lock(&sdata
->local
->mtx
);
1430 if (sdata
->wdev
.cac_started
) {
1431 ieee80211_vif_release_channel(sdata
);
1432 cfg80211_cac_event(sdata
->dev
, &chandef
,
1433 NL80211_RADAR_CAC_FINISHED
,
1436 mutex_unlock(&sdata
->local
->mtx
);
1440 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1441 struct ieee80211_sub_if_data
*sdata
,
1442 const u8
*wmm_param
, size_t wmm_param_len
)
1444 struct ieee80211_tx_queue_params params
;
1445 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1449 u8 uapsd_queues
= 0;
1451 if (!local
->ops
->conf_tx
)
1454 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1460 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1463 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1464 uapsd_queues
= ifmgd
->uapsd_queues
;
1466 count
= wmm_param
[6] & 0x0f;
1467 if (count
== ifmgd
->wmm_last_param_set
)
1469 ifmgd
->wmm_last_param_set
= count
;
1471 pos
= wmm_param
+ 8;
1472 left
= wmm_param_len
- 8;
1474 memset(¶ms
, 0, sizeof(params
));
1477 for (; left
>= 4; left
-= 4, pos
+= 4) {
1478 int aci
= (pos
[0] >> 5) & 0x03;
1479 int acm
= (pos
[0] >> 4) & 0x01;
1487 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1488 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1494 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1495 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1501 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1502 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1509 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1510 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1515 params
.aifs
= pos
[0] & 0x0f;
1516 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1517 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1518 params
.txop
= get_unaligned_le16(pos
+ 2);
1520 params
.uapsd
= uapsd
;
1523 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1525 params
.aifs
, params
.cw_min
, params
.cw_max
,
1526 params
.txop
, params
.uapsd
);
1527 sdata
->tx_conf
[queue
] = params
;
1528 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1530 "failed to set TX queue parameters for queue %d\n",
1534 /* enable WMM or activate new settings */
1535 sdata
->vif
.bss_conf
.qos
= true;
1539 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1541 lockdep_assert_held(&sdata
->local
->mtx
);
1543 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1544 ieee80211_run_deferred_scan(sdata
->local
);
1547 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1549 mutex_lock(&sdata
->local
->mtx
);
1550 __ieee80211_stop_poll(sdata
);
1551 mutex_unlock(&sdata
->local
->mtx
);
1554 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1555 u16 capab
, bool erp_valid
, u8 erp
)
1557 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1559 bool use_protection
;
1560 bool use_short_preamble
;
1561 bool use_short_slot
;
1564 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1565 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1567 use_protection
= false;
1568 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1571 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1572 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1573 use_short_slot
= true;
1575 if (use_protection
!= bss_conf
->use_cts_prot
) {
1576 bss_conf
->use_cts_prot
= use_protection
;
1577 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1580 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1581 bss_conf
->use_short_preamble
= use_short_preamble
;
1582 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1585 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1586 bss_conf
->use_short_slot
= use_short_slot
;
1587 changed
|= BSS_CHANGED_ERP_SLOT
;
1593 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1594 struct cfg80211_bss
*cbss
,
1595 u32 bss_info_changed
)
1597 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1598 struct ieee80211_local
*local
= sdata
->local
;
1599 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1601 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1602 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1603 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1605 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1606 beacon_loss_count
* bss_conf
->beacon_int
));
1608 sdata
->u
.mgd
.associated
= cbss
;
1609 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1611 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1613 if (sdata
->vif
.p2p
) {
1614 const struct cfg80211_bss_ies
*ies
;
1617 ies
= rcu_dereference(cbss
->ies
);
1621 ret
= cfg80211_get_p2p_attr(
1622 ies
->data
, ies
->len
,
1623 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1624 (u8
*) &bss_conf
->p2p_noa_attr
,
1625 sizeof(bss_conf
->p2p_noa_attr
));
1627 sdata
->u
.mgd
.p2p_noa_index
=
1628 bss_conf
->p2p_noa_attr
.index
;
1629 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1635 /* just to be sure */
1636 ieee80211_stop_poll(sdata
);
1638 ieee80211_led_assoc(local
, 1);
1640 if (sdata
->u
.mgd
.have_beacon
) {
1642 * If the AP is buggy we may get here with no DTIM period
1643 * known, so assume it's 1 which is the only safe assumption
1644 * in that case, although if the TIM IE is broken powersave
1645 * probably just won't work at all.
1647 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1648 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1649 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1651 bss_conf
->beacon_rate
= NULL
;
1652 bss_conf
->dtim_period
= 0;
1655 bss_conf
->assoc
= 1;
1657 /* Tell the driver to monitor connection quality (if supported) */
1658 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1659 bss_conf
->cqm_rssi_thold
)
1660 bss_info_changed
|= BSS_CHANGED_CQM
;
1662 /* Enable ARP filtering */
1663 if (bss_conf
->arp_addr_cnt
)
1664 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1666 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1668 mutex_lock(&local
->iflist_mtx
);
1669 ieee80211_recalc_ps(local
, -1);
1670 mutex_unlock(&local
->iflist_mtx
);
1672 ieee80211_recalc_smps(sdata
);
1673 ieee80211_recalc_ps_vif(sdata
);
1675 netif_carrier_on(sdata
->dev
);
1678 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1679 u16 stype
, u16 reason
, bool tx
,
1682 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1683 struct ieee80211_local
*local
= sdata
->local
;
1686 sdata_assert_lock(sdata
);
1688 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1691 if (WARN_ON(!ifmgd
->associated
))
1694 ieee80211_stop_poll(sdata
);
1696 ifmgd
->associated
= NULL
;
1697 netif_carrier_off(sdata
->dev
);
1700 * if we want to get out of ps before disassoc (why?) we have
1701 * to do it before sending disassoc, as otherwise the null-packet
1704 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1705 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1706 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1708 local
->ps_sdata
= NULL
;
1710 /* disable per-vif ps */
1711 ieee80211_recalc_ps_vif(sdata
);
1713 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1715 ieee80211_flush_queues(local
, sdata
);
1717 /* deauthenticate/disassociate now */
1718 if (tx
|| frame_buf
)
1719 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1720 reason
, tx
, frame_buf
);
1722 /* flush out frame */
1724 ieee80211_flush_queues(local
, sdata
);
1726 /* clear bssid only after building the needed mgmt frames */
1727 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1729 /* remove AP and TDLS peers */
1730 sta_info_flush(sdata
);
1732 /* finally reset all BSS / config parameters */
1733 changed
|= ieee80211_reset_erp_info(sdata
);
1735 ieee80211_led_assoc(local
, 0);
1736 changed
|= BSS_CHANGED_ASSOC
;
1737 sdata
->vif
.bss_conf
.assoc
= false;
1739 ifmgd
->p2p_noa_index
= -1;
1740 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
1741 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
1743 /* on the next assoc, re-program HT/VHT parameters */
1744 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1745 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1746 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
1747 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
1749 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1751 del_timer_sync(&local
->dynamic_ps_timer
);
1752 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1754 /* Disable ARP filtering */
1755 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1756 changed
|= BSS_CHANGED_ARP_FILTER
;
1758 sdata
->vif
.bss_conf
.qos
= false;
1759 changed
|= BSS_CHANGED_QOS
;
1761 /* The BSSID (not really interesting) and HT changed */
1762 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1763 ieee80211_bss_info_change_notify(sdata
, changed
);
1765 /* disassociated - set to defaults now */
1766 ieee80211_set_wmm_default(sdata
, false);
1768 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1769 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1770 del_timer_sync(&sdata
->u
.mgd
.timer
);
1771 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1773 sdata
->vif
.bss_conf
.dtim_period
= 0;
1774 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
1776 ifmgd
->have_beacon
= false;
1779 mutex_lock(&local
->mtx
);
1780 ieee80211_vif_release_channel(sdata
);
1781 mutex_unlock(&local
->mtx
);
1783 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1786 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1787 struct ieee80211_hdr
*hdr
)
1790 * We can postpone the mgd.timer whenever receiving unicast frames
1791 * from AP because we know that the connection is working both ways
1792 * at that time. But multicast frames (and hence also beacons) must
1793 * be ignored here, because we need to trigger the timer during
1794 * data idle periods for sending the periodic probe request to the
1795 * AP we're connected to.
1797 if (is_multicast_ether_addr(hdr
->addr1
))
1800 ieee80211_sta_reset_conn_monitor(sdata
);
1803 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1805 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1806 struct ieee80211_local
*local
= sdata
->local
;
1808 mutex_lock(&local
->mtx
);
1809 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
1812 __ieee80211_stop_poll(sdata
);
1814 mutex_lock(&local
->iflist_mtx
);
1815 ieee80211_recalc_ps(local
, -1);
1816 mutex_unlock(&local
->iflist_mtx
);
1818 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1822 * We've received a probe response, but are not sure whether
1823 * we have or will be receiving any beacons or data, so let's
1824 * schedule the timers again, just in case.
1826 ieee80211_sta_reset_beacon_monitor(sdata
);
1828 mod_timer(&ifmgd
->conn_mon_timer
,
1829 round_jiffies_up(jiffies
+
1830 IEEE80211_CONNECTION_IDLE_TIME
));
1832 mutex_unlock(&local
->mtx
);
1835 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1836 struct ieee80211_hdr
*hdr
, bool ack
)
1838 if (!ieee80211_is_data(hdr
->frame_control
))
1841 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1842 sdata
->u
.mgd
.probe_send_count
> 0) {
1844 ieee80211_sta_reset_conn_monitor(sdata
);
1846 sdata
->u
.mgd
.nullfunc_failed
= true;
1847 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1852 ieee80211_sta_reset_conn_monitor(sdata
);
1855 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1857 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1859 u8
*dst
= ifmgd
->associated
->bssid
;
1860 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1863 * Try sending broadcast probe requests for the last three
1864 * probe requests after the first ones failed since some
1865 * buggy APs only support broadcast probe requests.
1867 if (ifmgd
->probe_send_count
>= unicast_limit
)
1871 * When the hardware reports an accurate Tx ACK status, it's
1872 * better to send a nullfunc frame instead of a probe request,
1873 * as it will kick us off the AP quickly if we aren't associated
1874 * anymore. The timeout will be reset if the frame is ACKed by
1877 ifmgd
->probe_send_count
++;
1879 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1880 ifmgd
->nullfunc_failed
= false;
1881 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1886 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1887 if (WARN_ON_ONCE(ssid
== NULL
))
1892 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1893 0, (u32
) -1, true, 0,
1894 ifmgd
->associated
->channel
, false);
1898 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1899 run_again(sdata
, ifmgd
->probe_timeout
);
1900 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1901 ieee80211_flush_queues(sdata
->local
, sdata
);
1904 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1907 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1908 bool already
= false;
1910 if (!ieee80211_sdata_running(sdata
))
1915 if (!ifmgd
->associated
)
1918 mutex_lock(&sdata
->local
->mtx
);
1920 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1921 mutex_unlock(&sdata
->local
->mtx
);
1926 mlme_dbg_ratelimited(sdata
,
1927 "detected beacon loss from AP (missed %d beacons) - probing\n",
1930 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1931 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
,
1936 * The driver/our work has already reported this event or the
1937 * connection monitoring has kicked in and we have already sent
1938 * a probe request. Or maybe the AP died and the driver keeps
1939 * reporting until we disassociate...
1941 * In either case we have to ignore the current call to this
1942 * function (except for setting the correct probe reason bit)
1943 * because otherwise we would reset the timer every time and
1944 * never check whether we received a probe response!
1946 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1949 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1951 mutex_unlock(&sdata
->local
->mtx
);
1956 mutex_lock(&sdata
->local
->iflist_mtx
);
1957 ieee80211_recalc_ps(sdata
->local
, -1);
1958 mutex_unlock(&sdata
->local
->iflist_mtx
);
1960 ifmgd
->probe_send_count
= 0;
1961 ieee80211_mgd_probe_ap_send(sdata
);
1963 sdata_unlock(sdata
);
1966 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1967 struct ieee80211_vif
*vif
)
1969 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1970 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1971 struct cfg80211_bss
*cbss
;
1972 struct sk_buff
*skb
;
1976 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1979 sdata_assert_lock(sdata
);
1981 if (ifmgd
->associated
)
1982 cbss
= ifmgd
->associated
;
1983 else if (ifmgd
->auth_data
)
1984 cbss
= ifmgd
->auth_data
->bss
;
1985 else if (ifmgd
->assoc_data
)
1986 cbss
= ifmgd
->assoc_data
->bss
;
1991 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1992 if (WARN_ON_ONCE(ssid
== NULL
))
1997 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1998 (u32
) -1, cbss
->channel
,
2005 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2007 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2009 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2010 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2013 if (!ifmgd
->associated
) {
2014 sdata_unlock(sdata
);
2018 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2019 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2021 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
2022 sdata
->vif
.csa_active
= false;
2023 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
2024 IEEE80211_MAX_QUEUE_MAP
,
2025 IEEE80211_QUEUE_STOP_REASON_CSA
);
2027 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
2028 IEEE80211_DEAUTH_FRAME_LEN
);
2029 sdata_unlock(sdata
);
2032 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2034 struct ieee80211_sub_if_data
*sdata
=
2035 container_of(work
, struct ieee80211_sub_if_data
,
2036 u
.mgd
.beacon_connection_loss_work
);
2037 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2038 struct sta_info
*sta
;
2040 if (ifmgd
->associated
) {
2042 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2044 sta
->beacon_loss_count
++;
2048 if (ifmgd
->connection_loss
) {
2049 sdata_info(sdata
, "Connection to AP %pM lost\n",
2051 __ieee80211_disconnect(sdata
);
2053 ieee80211_mgd_probe_ap(sdata
, true);
2057 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2059 struct ieee80211_sub_if_data
*sdata
=
2060 container_of(work
, struct ieee80211_sub_if_data
,
2061 u
.mgd
.csa_connection_drop_work
);
2063 __ieee80211_disconnect(sdata
);
2066 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2068 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2069 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2071 trace_api_beacon_loss(sdata
);
2073 sdata
->u
.mgd
.connection_loss
= false;
2074 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2076 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2078 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2080 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2081 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2083 trace_api_connection_loss(sdata
);
2085 sdata
->u
.mgd
.connection_loss
= true;
2086 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2088 EXPORT_SYMBOL(ieee80211_connection_loss
);
2091 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2094 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2096 sdata_assert_lock(sdata
);
2099 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2101 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2102 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2103 sdata
->u
.mgd
.flags
= 0;
2104 mutex_lock(&sdata
->local
->mtx
);
2105 ieee80211_vif_release_channel(sdata
);
2106 mutex_unlock(&sdata
->local
->mtx
);
2109 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2111 sdata
->u
.mgd
.auth_data
= NULL
;
2114 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2115 struct ieee80211_mgmt
*mgmt
, size_t len
)
2117 struct ieee80211_local
*local
= sdata
->local
;
2118 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2120 struct ieee802_11_elems elems
;
2123 pos
= mgmt
->u
.auth
.variable
;
2124 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2125 if (!elems
.challenge
)
2127 auth_data
->expected_transaction
= 4;
2128 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2129 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2130 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2131 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2132 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2133 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2134 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2135 auth_data
->key
, auth_data
->key_len
,
2136 auth_data
->key_idx
, tx_flags
);
2139 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2140 struct ieee80211_mgmt
*mgmt
, size_t len
)
2142 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2144 u16 auth_alg
, auth_transaction
, status_code
;
2145 struct sta_info
*sta
;
2147 sdata_assert_lock(sdata
);
2152 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2155 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2157 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2160 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2161 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2162 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2164 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2165 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2166 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2167 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2169 ifmgd
->auth_data
->expected_transaction
);
2173 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2174 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2175 mgmt
->sa
, status_code
);
2176 ieee80211_destroy_auth_data(sdata
, false);
2177 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2181 switch (ifmgd
->auth_data
->algorithm
) {
2182 case WLAN_AUTH_OPEN
:
2183 case WLAN_AUTH_LEAP
:
2187 case WLAN_AUTH_SHARED_KEY
:
2188 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2189 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2190 /* need another frame */
2195 WARN_ONCE(1, "invalid auth alg %d",
2196 ifmgd
->auth_data
->algorithm
);
2200 sdata_info(sdata
, "authenticated\n");
2201 ifmgd
->auth_data
->done
= true;
2202 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2203 ifmgd
->auth_data
->timeout_started
= true;
2204 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2206 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2207 ifmgd
->auth_data
->expected_transaction
!= 2) {
2209 * Report auth frame to user space for processing since another
2210 * round of Authentication frames is still needed.
2212 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2216 /* move station state to auth */
2217 mutex_lock(&sdata
->local
->sta_mtx
);
2218 sta
= sta_info_get(sdata
, bssid
);
2220 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2223 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2224 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2227 mutex_unlock(&sdata
->local
->sta_mtx
);
2229 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2232 mutex_unlock(&sdata
->local
->sta_mtx
);
2233 /* ignore frame -- wait for timeout */
2237 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2238 struct ieee80211_mgmt
*mgmt
, size_t len
)
2240 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2241 const u8
*bssid
= NULL
;
2244 sdata_assert_lock(sdata
);
2249 if (!ifmgd
->associated
||
2250 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2253 bssid
= ifmgd
->associated
->bssid
;
2255 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2257 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2258 bssid
, reason_code
);
2260 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2262 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2266 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2267 struct ieee80211_mgmt
*mgmt
, size_t len
)
2269 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2272 sdata_assert_lock(sdata
);
2277 if (!ifmgd
->associated
||
2278 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2281 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2283 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2284 mgmt
->sa
, reason_code
);
2286 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2288 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2291 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2292 u8
*supp_rates
, unsigned int supp_rates_len
,
2293 u32
*rates
, u32
*basic_rates
,
2294 bool *have_higher_than_11mbit
,
2295 int *min_rate
, int *min_rate_index
,
2296 int shift
, u32 rate_flags
)
2300 for (i
= 0; i
< supp_rates_len
; i
++) {
2301 int rate
= supp_rates
[i
] & 0x7f;
2302 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2304 if ((rate
* 5 * (1 << shift
)) > 110)
2305 *have_higher_than_11mbit
= true;
2308 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2309 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2311 * Note: Even through the membership selector and the basic
2312 * rate flag share the same bit, they are not exactly
2315 if (!!(supp_rates
[i
] & 0x80) &&
2316 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2319 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2320 struct ieee80211_rate
*br
;
2323 br
= &sband
->bitrates
[j
];
2324 if ((rate_flags
& br
->flags
) != rate_flags
)
2327 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2328 if (brate
== rate
) {
2331 *basic_rates
|= BIT(j
);
2332 if ((rate
* 5) < *min_rate
) {
2333 *min_rate
= rate
* 5;
2334 *min_rate_index
= j
;
2342 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2345 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2347 sdata_assert_lock(sdata
);
2350 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2352 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2353 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2354 sdata
->u
.mgd
.flags
= 0;
2355 mutex_lock(&sdata
->local
->mtx
);
2356 ieee80211_vif_release_channel(sdata
);
2357 mutex_unlock(&sdata
->local
->mtx
);
2361 sdata
->u
.mgd
.assoc_data
= NULL
;
2364 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2365 struct cfg80211_bss
*cbss
,
2366 struct ieee80211_mgmt
*mgmt
, size_t len
)
2368 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2369 struct ieee80211_local
*local
= sdata
->local
;
2370 struct ieee80211_supported_band
*sband
;
2371 struct sta_info
*sta
;
2373 u16 capab_info
, aid
;
2374 struct ieee802_11_elems elems
;
2375 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2376 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2377 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2382 /* AssocResp and ReassocResp have identical structure */
2384 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2385 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2387 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2388 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2390 aid
&= ~(BIT(15) | BIT(14));
2392 ifmgd
->broken_ap
= false;
2394 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2395 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2398 ifmgd
->broken_ap
= true;
2401 pos
= mgmt
->u
.assoc_resp
.variable
;
2402 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2404 if (!elems
.supp_rates
) {
2405 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2412 * Some APs are erroneously not including some information in their
2413 * (re)association response frames. Try to recover by using the data
2414 * from the beacon or probe response. This seems to afflict mobile
2415 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2416 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2418 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2419 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2420 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2421 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2422 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2423 const struct cfg80211_bss_ies
*ies
;
2424 struct ieee802_11_elems bss_elems
;
2427 ies
= rcu_dereference(cbss
->ies
);
2429 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2435 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2437 if (assoc_data
->wmm
&&
2438 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2439 elems
.wmm_param
= bss_elems
.wmm_param
;
2441 "AP bug: WMM param missing from AssocResp\n");
2445 * Also check if we requested HT/VHT, otherwise the AP doesn't
2446 * have to include the IEs in the (re)association response.
2448 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2449 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2450 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2452 "AP bug: HT capability missing from AssocResp\n");
2454 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2455 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2456 elems
.ht_operation
= bss_elems
.ht_operation
;
2458 "AP bug: HT operation missing from AssocResp\n");
2460 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2461 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2462 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2464 "AP bug: VHT capa missing from AssocResp\n");
2466 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2467 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2468 elems
.vht_operation
= bss_elems
.vht_operation
;
2470 "AP bug: VHT operation missing from AssocResp\n");
2475 * We previously checked these in the beacon/probe response, so
2476 * they should be present here. This is just a safety net.
2478 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2479 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2481 "HT AP is missing WMM params or HT capability/operation\n");
2486 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2487 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2489 "VHT AP is missing VHT capability/operation\n");
2494 mutex_lock(&sdata
->local
->sta_mtx
);
2496 * station info was already allocated and inserted before
2497 * the association and should be available to us
2499 sta
= sta_info_get(sdata
, cbss
->bssid
);
2500 if (WARN_ON(!sta
)) {
2501 mutex_unlock(&sdata
->local
->sta_mtx
);
2506 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2508 /* Set up internal HT/VHT capabilities */
2509 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2510 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2511 elems
.ht_cap_elem
, sta
);
2513 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2514 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2515 elems
.vht_cap_elem
, sta
);
2518 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2519 * in their association response, so ignore that data for our own
2520 * configuration. If it changed since the last beacon, we'll get the
2521 * next beacon and update then.
2525 * If an operating mode notification IE is present, override the
2526 * NSS calculation (that would be done in rate_control_rate_init())
2527 * and use the # of streams from that element.
2529 if (elems
.opmode_notif
&&
2530 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2533 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2534 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2536 sta
->sta
.rx_nss
= nss
;
2539 rate_control_rate_init(sta
);
2541 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2542 set_sta_flag(sta
, WLAN_STA_MFP
);
2544 if (elems
.wmm_param
)
2545 set_sta_flag(sta
, WLAN_STA_WME
);
2547 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2548 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2549 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2552 "failed to move station %pM to desired state\n",
2554 WARN_ON(__sta_info_destroy(sta
));
2555 mutex_unlock(&sdata
->local
->sta_mtx
);
2560 mutex_unlock(&sdata
->local
->sta_mtx
);
2563 * Always handle WMM once after association regardless
2564 * of the first value the AP uses. Setting -1 here has
2565 * that effect because the AP values is an unsigned
2568 ifmgd
->wmm_last_param_set
= -1;
2570 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) && elems
.wmm_param
)
2571 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2572 elems
.wmm_param_len
);
2574 ieee80211_set_wmm_default(sdata
, false);
2575 changed
|= BSS_CHANGED_QOS
;
2577 /* set AID and assoc capability,
2578 * ieee80211_set_associated() will tell the driver */
2579 bss_conf
->aid
= aid
;
2580 bss_conf
->assoc_capability
= capab_info
;
2581 ieee80211_set_associated(sdata
, cbss
, changed
);
2584 * If we're using 4-addr mode, let the AP know that we're
2585 * doing so, so that it can create the STA VLAN on its side
2587 if (ifmgd
->use_4addr
)
2588 ieee80211_send_4addr_nullfunc(local
, sdata
);
2591 * Start timer to probe the connection to the AP now.
2592 * Also start the timer that will detect beacon loss.
2594 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2595 ieee80211_sta_reset_beacon_monitor(sdata
);
2603 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2604 struct ieee80211_mgmt
*mgmt
,
2607 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2608 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2609 u16 capab_info
, status_code
, aid
;
2610 struct ieee802_11_elems elems
;
2613 struct cfg80211_bss
*bss
;
2615 sdata_assert_lock(sdata
);
2619 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2623 * AssocResp and ReassocResp have identical structure, so process both
2624 * of them in this function.
2630 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2631 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2632 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2633 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2636 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2637 reassoc
? "Rea" : "A", mgmt
->sa
,
2638 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2640 pos
= mgmt
->u
.assoc_resp
.variable
;
2641 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2643 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2644 elems
.timeout_int
&&
2645 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2647 tu
= le32_to_cpu(elems
.timeout_int
->value
);
2648 ms
= tu
* 1024 / 1000;
2650 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2652 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2653 assoc_data
->timeout_started
= true;
2654 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2655 run_again(sdata
, assoc_data
->timeout
);
2659 bss
= assoc_data
->bss
;
2661 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2662 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2663 mgmt
->sa
, status_code
);
2664 ieee80211_destroy_assoc_data(sdata
, false);
2666 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
2667 /* oops -- internal error -- send timeout for now */
2668 ieee80211_destroy_assoc_data(sdata
, false);
2669 cfg80211_assoc_timeout(sdata
->dev
, bss
);
2672 sdata_info(sdata
, "associated\n");
2675 * destroy assoc_data afterwards, as otherwise an idle
2676 * recalc after assoc_data is NULL but before associated
2677 * is set can cause the interface to go idle
2679 ieee80211_destroy_assoc_data(sdata
, true);
2682 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
);
2685 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2686 struct ieee80211_mgmt
*mgmt
, size_t len
,
2687 struct ieee80211_rx_status
*rx_status
,
2688 struct ieee802_11_elems
*elems
)
2690 struct ieee80211_local
*local
= sdata
->local
;
2692 struct ieee80211_bss
*bss
;
2693 struct ieee80211_channel
*channel
;
2695 sdata_assert_lock(sdata
);
2697 if (elems
->ds_params
)
2698 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2701 freq
= rx_status
->freq
;
2703 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2705 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2708 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2711 ieee80211_rx_bss_put(local
, bss
);
2712 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
2717 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2718 struct sk_buff
*skb
)
2720 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2721 struct ieee80211_if_managed
*ifmgd
;
2722 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2723 size_t baselen
, len
= skb
->len
;
2724 struct ieee802_11_elems elems
;
2726 ifmgd
= &sdata
->u
.mgd
;
2728 sdata_assert_lock(sdata
);
2730 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2731 return; /* ignore ProbeResp to foreign address */
2733 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2737 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2740 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2742 if (ifmgd
->associated
&&
2743 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2744 ieee80211_reset_ap_probe(sdata
);
2746 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2747 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2748 /* got probe response, continue with auth */
2749 sdata_info(sdata
, "direct probe responded\n");
2750 ifmgd
->auth_data
->tries
= 0;
2751 ifmgd
->auth_data
->timeout
= jiffies
;
2752 ifmgd
->auth_data
->timeout_started
= true;
2753 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2758 * This is the canonical list of information elements we care about,
2759 * the filter code also gives us all changes to the Microsoft OUI
2760 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2762 * We implement beacon filtering in software since that means we can
2763 * avoid processing the frame here and in cfg80211, and userspace
2764 * will not be able to tell whether the hardware supports it or not.
2766 * XXX: This list needs to be dynamic -- userspace needs to be able to
2767 * add items it requires. It also needs to be able to tell us to
2768 * look out for other vendor IEs.
2770 static const u64 care_about_ies
=
2771 (1ULL << WLAN_EID_COUNTRY
) |
2772 (1ULL << WLAN_EID_ERP_INFO
) |
2773 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2774 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2775 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2776 (1ULL << WLAN_EID_HT_OPERATION
);
2778 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2779 struct ieee80211_mgmt
*mgmt
, size_t len
,
2780 struct ieee80211_rx_status
*rx_status
)
2782 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2783 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2785 struct ieee802_11_elems elems
;
2786 struct ieee80211_local
*local
= sdata
->local
;
2787 struct ieee80211_chanctx_conf
*chanctx_conf
;
2788 struct ieee80211_channel
*chan
;
2789 struct sta_info
*sta
;
2795 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2797 sdata_assert_lock(sdata
);
2799 /* Process beacon from the current BSS */
2800 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2805 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2806 if (!chanctx_conf
) {
2811 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2815 chan
= chanctx_conf
->def
.chan
;
2818 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
2819 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2820 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2821 len
- baselen
, false, &elems
);
2823 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2824 if (elems
.tim
&& !elems
.parse_error
) {
2825 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
2826 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
2828 ifmgd
->have_beacon
= true;
2829 ifmgd
->assoc_data
->need_beacon
= false;
2830 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
2831 sdata
->vif
.bss_conf
.sync_tsf
=
2832 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2833 sdata
->vif
.bss_conf
.sync_device_ts
=
2834 rx_status
->device_timestamp
;
2836 sdata
->vif
.bss_conf
.sync_dtim_count
=
2837 elems
.tim
->dtim_count
;
2839 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
2841 /* continue assoc process */
2842 ifmgd
->assoc_data
->timeout
= jiffies
;
2843 ifmgd
->assoc_data
->timeout_started
= true;
2844 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
2848 if (!ifmgd
->associated
||
2849 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2851 bssid
= ifmgd
->associated
->bssid
;
2853 /* Track average RSSI from the Beacon frames of the current AP */
2854 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2855 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2856 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2857 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2858 ifmgd
->last_cqm_event_signal
= 0;
2859 ifmgd
->count_beacon_signal
= 1;
2860 ifmgd
->last_ave_beacon_signal
= 0;
2862 ifmgd
->ave_beacon_signal
=
2863 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2864 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2865 ifmgd
->ave_beacon_signal
) / 16;
2866 ifmgd
->count_beacon_signal
++;
2869 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2870 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2871 int sig
= ifmgd
->ave_beacon_signal
;
2872 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2875 * if signal crosses either of the boundaries, invoke callback
2876 * with appropriate parameters
2878 if (sig
> ifmgd
->rssi_max_thold
&&
2879 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2880 ifmgd
->last_ave_beacon_signal
= sig
;
2881 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
2882 } else if (sig
< ifmgd
->rssi_min_thold
&&
2883 (last_sig
>= ifmgd
->rssi_max_thold
||
2885 ifmgd
->last_ave_beacon_signal
= sig
;
2886 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
2890 if (bss_conf
->cqm_rssi_thold
&&
2891 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2892 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2893 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2894 int last_event
= ifmgd
->last_cqm_event_signal
;
2895 int thold
= bss_conf
->cqm_rssi_thold
;
2896 int hyst
= bss_conf
->cqm_rssi_hyst
;
2898 (last_event
== 0 || sig
< last_event
- hyst
)) {
2899 ifmgd
->last_cqm_event_signal
= sig
;
2900 ieee80211_cqm_rssi_notify(
2902 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2904 } else if (sig
> thold
&&
2905 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2906 ifmgd
->last_cqm_event_signal
= sig
;
2907 ieee80211_cqm_rssi_notify(
2909 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2914 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
2915 mlme_dbg_ratelimited(sdata
,
2916 "cancelling AP probe due to a received beacon\n");
2917 ieee80211_reset_ap_probe(sdata
);
2921 * Push the beacon loss detection into the future since
2922 * we are processing a beacon from the AP just now.
2924 ieee80211_sta_reset_beacon_monitor(sdata
);
2926 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2927 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2928 len
- baselen
, false, &elems
,
2929 care_about_ies
, ncrc
);
2931 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2932 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
2936 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2937 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2938 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2939 ieee80211_hw_config(local
,
2940 IEEE80211_CONF_CHANGE_PS
);
2942 ieee80211_send_nullfunc(local
, sdata
, 0);
2943 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2944 local
->pspolling
= true;
2947 * Here is assumed that the driver will be
2948 * able to send ps-poll frame and receive a
2949 * response even though power save mode is
2950 * enabled, but some drivers might require
2951 * to disable power save here. This needs
2952 * to be investigated.
2954 ieee80211_send_pspoll(local
, sdata
);
2959 if (sdata
->vif
.p2p
) {
2960 struct ieee80211_p2p_noa_attr noa
= {};
2963 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
2965 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
2966 (u8
*) &noa
, sizeof(noa
));
2968 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
2969 /* valid noa_attr and index changed */
2970 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
2971 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
2972 changed
|= BSS_CHANGED_P2P_PS
;
2974 * make sure we update all information, the CRC
2975 * mechanism doesn't look at P2P attributes.
2977 ifmgd
->beacon_crc_valid
= false;
2979 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
2980 /* noa_attr not found and we had valid noa_attr before */
2981 sdata
->u
.mgd
.p2p_noa_index
= -1;
2982 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
2983 changed
|= BSS_CHANGED_P2P_PS
;
2984 ifmgd
->beacon_crc_valid
= false;
2988 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2990 ifmgd
->beacon_crc
= ncrc
;
2991 ifmgd
->beacon_crc_valid
= true;
2993 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2995 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
2998 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
2999 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3000 elems
.wmm_param_len
))
3001 changed
|= BSS_CHANGED_QOS
;
3004 * If we haven't had a beacon before, tell the driver about the
3005 * DTIM period (and beacon timing if desired) now.
3007 if (!ifmgd
->have_beacon
) {
3008 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3010 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3012 bss_conf
->dtim_period
= 1;
3014 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3015 sdata
->vif
.bss_conf
.sync_tsf
=
3016 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3017 sdata
->vif
.bss_conf
.sync_device_ts
=
3018 rx_status
->device_timestamp
;
3020 sdata
->vif
.bss_conf
.sync_dtim_count
=
3021 elems
.tim
->dtim_count
;
3023 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3026 changed
|= BSS_CHANGED_BEACON_INFO
;
3027 ifmgd
->have_beacon
= true;
3029 mutex_lock(&local
->iflist_mtx
);
3030 ieee80211_recalc_ps(local
, -1);
3031 mutex_unlock(&local
->iflist_mtx
);
3033 ieee80211_recalc_ps_vif(sdata
);
3036 if (elems
.erp_info
) {
3038 erp_value
= elems
.erp_info
[0];
3042 changed
|= ieee80211_handle_bss_capability(sdata
,
3043 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3044 erp_valid
, erp_value
);
3046 mutex_lock(&local
->sta_mtx
);
3047 sta
= sta_info_get(sdata
, bssid
);
3049 if (ieee80211_config_bw(sdata
, sta
, elems
.ht_operation
,
3050 elems
.vht_operation
, bssid
, &changed
)) {
3051 mutex_unlock(&local
->sta_mtx
);
3052 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3053 WLAN_REASON_DEAUTH_LEAVING
,
3055 cfg80211_tx_mlme_mgmt(sdata
->dev
, deauth_buf
,
3056 sizeof(deauth_buf
));
3060 if (sta
&& elems
.opmode_notif
)
3061 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3062 rx_status
->band
, true);
3063 mutex_unlock(&local
->sta_mtx
);
3065 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
3066 mgmt
->u
.probe_resp
.capab_info
&
3067 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
3068 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
3070 elems
.country_elem_len
,
3071 elems
.pwr_constr_elem
);
3073 ieee80211_bss_info_change_notify(sdata
, changed
);
3076 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3077 struct sk_buff
*skb
)
3079 struct ieee80211_rx_status
*rx_status
;
3080 struct ieee80211_mgmt
*mgmt
;
3082 struct ieee802_11_elems elems
;
3085 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3086 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3087 fc
= le16_to_cpu(mgmt
->frame_control
);
3091 switch (fc
& IEEE80211_FCTL_STYPE
) {
3092 case IEEE80211_STYPE_BEACON
:
3093 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3095 case IEEE80211_STYPE_PROBE_RESP
:
3096 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3098 case IEEE80211_STYPE_AUTH
:
3099 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3101 case IEEE80211_STYPE_DEAUTH
:
3102 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3104 case IEEE80211_STYPE_DISASSOC
:
3105 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3107 case IEEE80211_STYPE_ASSOC_RESP
:
3108 case IEEE80211_STYPE_REASSOC_RESP
:
3109 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3111 case IEEE80211_STYPE_ACTION
:
3112 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3113 ies_len
= skb
->len
-
3114 offsetof(struct ieee80211_mgmt
,
3115 u
.action
.u
.chan_switch
.variable
);
3120 ieee802_11_parse_elems(
3121 mgmt
->u
.action
.u
.chan_switch
.variable
,
3122 ies_len
, true, &elems
);
3124 if (elems
.parse_error
)
3127 ieee80211_sta_process_chanswitch(sdata
,
3130 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3131 ies_len
= skb
->len
-
3132 offsetof(struct ieee80211_mgmt
,
3133 u
.action
.u
.ext_chan_switch
.variable
);
3138 ieee802_11_parse_elems(
3139 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3140 ies_len
, true, &elems
);
3142 if (elems
.parse_error
)
3145 /* for the handling code pretend this was also an IE */
3146 elems
.ext_chansw_ie
=
3147 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3149 ieee80211_sta_process_chanswitch(sdata
,
3155 sdata_unlock(sdata
);
3158 static void ieee80211_sta_timer(unsigned long data
)
3160 struct ieee80211_sub_if_data
*sdata
=
3161 (struct ieee80211_sub_if_data
*) data
;
3163 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3166 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3167 u8
*bssid
, u8 reason
, bool tx
)
3169 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3171 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3174 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3175 IEEE80211_DEAUTH_FRAME_LEN
);
3178 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3180 struct ieee80211_local
*local
= sdata
->local
;
3181 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3182 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3185 sdata_assert_lock(sdata
);
3187 if (WARN_ON_ONCE(!auth_data
))
3192 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3193 sdata_info(sdata
, "authentication with %pM timed out\n",
3194 auth_data
->bss
->bssid
);
3197 * Most likely AP is not in the range so remove the
3198 * bss struct for that AP.
3200 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3205 drv_mgd_prepare_tx(local
, sdata
);
3207 if (auth_data
->bss
->proberesp_ies
) {
3211 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3212 auth_data
->bss
->bssid
, auth_data
->tries
,
3213 IEEE80211_AUTH_MAX_TRIES
);
3215 auth_data
->expected_transaction
= 2;
3217 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3218 trans
= auth_data
->sae_trans
;
3219 status
= auth_data
->sae_status
;
3220 auth_data
->expected_transaction
= trans
;
3223 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3224 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3225 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3227 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3228 auth_data
->data
, auth_data
->data_len
,
3229 auth_data
->bss
->bssid
,
3230 auth_data
->bss
->bssid
, NULL
, 0, 0,
3235 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3236 auth_data
->bss
->bssid
, auth_data
->tries
,
3237 IEEE80211_AUTH_MAX_TRIES
);
3240 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3246 * Direct probe is sent to broadcast address as some APs
3247 * will not answer to direct packet in unassociated state.
3249 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
3250 NULL
, 0, (u32
) -1, true, 0,
3251 auth_data
->bss
->channel
, false);
3255 if (tx_flags
== 0) {
3256 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3257 auth_data
->timeout_started
= true;
3258 run_again(sdata
, auth_data
->timeout
);
3260 auth_data
->timeout
=
3261 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3262 auth_data
->timeout_started
= true;
3263 run_again(sdata
, auth_data
->timeout
);
3269 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3271 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3272 struct ieee80211_local
*local
= sdata
->local
;
3274 sdata_assert_lock(sdata
);
3276 assoc_data
->tries
++;
3277 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3278 sdata_info(sdata
, "association with %pM timed out\n",
3279 assoc_data
->bss
->bssid
);
3282 * Most likely AP is not in the range so remove the
3283 * bss struct for that AP.
3285 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3290 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3291 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3292 IEEE80211_ASSOC_MAX_TRIES
);
3293 ieee80211_send_assoc(sdata
);
3295 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3296 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3297 assoc_data
->timeout_started
= true;
3298 run_again(sdata
, assoc_data
->timeout
);
3300 assoc_data
->timeout
=
3301 round_jiffies_up(jiffies
+
3302 IEEE80211_ASSOC_TIMEOUT_LONG
);
3303 assoc_data
->timeout_started
= true;
3304 run_again(sdata
, assoc_data
->timeout
);
3310 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3311 __le16 fc
, bool acked
)
3313 struct ieee80211_local
*local
= sdata
->local
;
3315 sdata
->u
.mgd
.status_fc
= fc
;
3316 sdata
->u
.mgd
.status_acked
= acked
;
3317 sdata
->u
.mgd
.status_received
= true;
3319 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3322 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3324 struct ieee80211_local
*local
= sdata
->local
;
3325 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3329 if (ifmgd
->status_received
) {
3330 __le16 fc
= ifmgd
->status_fc
;
3331 bool status_acked
= ifmgd
->status_acked
;
3333 ifmgd
->status_received
= false;
3334 if (ifmgd
->auth_data
&&
3335 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3337 ifmgd
->auth_data
->timeout
=
3338 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3339 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3341 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3343 ifmgd
->auth_data
->timeout_started
= true;
3344 } else if (ifmgd
->assoc_data
&&
3345 (ieee80211_is_assoc_req(fc
) ||
3346 ieee80211_is_reassoc_req(fc
))) {
3348 ifmgd
->assoc_data
->timeout
=
3349 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3350 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3352 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3354 ifmgd
->assoc_data
->timeout_started
= true;
3358 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3359 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3360 if (ifmgd
->auth_data
->done
) {
3362 * ok ... we waited for assoc but userspace didn't,
3363 * so let's just kill the auth data
3365 ieee80211_destroy_auth_data(sdata
, false);
3366 } else if (ieee80211_probe_auth(sdata
)) {
3369 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3371 ieee80211_destroy_auth_data(sdata
, false);
3373 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3375 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3376 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3378 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3379 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3380 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3381 ieee80211_do_assoc(sdata
)) {
3382 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3384 ieee80211_destroy_assoc_data(sdata
, false);
3385 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3387 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3388 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3390 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3391 ifmgd
->associated
) {
3395 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3397 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3398 max_tries
= max_nullfunc_tries
;
3400 max_tries
= max_probe_tries
;
3402 /* ACK received for nullfunc probing frame */
3403 if (!ifmgd
->probe_send_count
)
3404 ieee80211_reset_ap_probe(sdata
);
3405 else if (ifmgd
->nullfunc_failed
) {
3406 if (ifmgd
->probe_send_count
< max_tries
) {
3408 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3409 bssid
, ifmgd
->probe_send_count
,
3411 ieee80211_mgd_probe_ap_send(sdata
);
3414 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3416 ieee80211_sta_connection_lost(sdata
, bssid
,
3417 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3420 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3421 run_again(sdata
, ifmgd
->probe_timeout
);
3422 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3424 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3425 bssid
, probe_wait_ms
);
3426 ieee80211_sta_connection_lost(sdata
, bssid
,
3427 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3428 } else if (ifmgd
->probe_send_count
< max_tries
) {
3430 "No probe response from AP %pM after %dms, try %d/%i\n",
3431 bssid
, probe_wait_ms
,
3432 ifmgd
->probe_send_count
, max_tries
);
3433 ieee80211_mgd_probe_ap_send(sdata
);
3436 * We actually lost the connection ... or did we?
3439 wiphy_debug(local
->hw
.wiphy
,
3440 "%s: No probe response from AP %pM"
3441 " after %dms, disconnecting.\n",
3443 bssid
, probe_wait_ms
);
3445 ieee80211_sta_connection_lost(sdata
, bssid
,
3446 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3450 sdata_unlock(sdata
);
3453 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3455 struct ieee80211_sub_if_data
*sdata
=
3456 (struct ieee80211_sub_if_data
*) data
;
3457 struct ieee80211_local
*local
= sdata
->local
;
3459 if (local
->quiescing
)
3462 sdata
->u
.mgd
.connection_loss
= false;
3463 ieee80211_queue_work(&sdata
->local
->hw
,
3464 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3467 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3469 struct ieee80211_sub_if_data
*sdata
=
3470 (struct ieee80211_sub_if_data
*) data
;
3471 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3472 struct ieee80211_local
*local
= sdata
->local
;
3474 if (local
->quiescing
)
3477 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3480 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3482 struct ieee80211_sub_if_data
*sdata
=
3483 container_of(work
, struct ieee80211_sub_if_data
,
3484 u
.mgd
.monitor_work
);
3486 ieee80211_mgd_probe_ap(sdata
, false);
3489 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3493 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3494 __ieee80211_stop_poll(sdata
);
3496 /* let's probe the connection once */
3497 flags
= sdata
->local
->hw
.flags
;
3498 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3499 ieee80211_queue_work(&sdata
->local
->hw
,
3500 &sdata
->u
.mgd
.monitor_work
);
3501 /* and do all the other regular work too */
3502 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3507 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3509 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3512 if (!ifmgd
->associated
) {
3513 sdata_unlock(sdata
);
3517 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3518 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3519 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3520 ieee80211_sta_connection_lost(sdata
,
3521 ifmgd
->associated
->bssid
,
3522 WLAN_REASON_UNSPECIFIED
,
3524 sdata_unlock(sdata
);
3527 sdata_unlock(sdata
);
3531 /* interface setup */
3532 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3534 struct ieee80211_if_managed
*ifmgd
;
3536 ifmgd
= &sdata
->u
.mgd
;
3537 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3538 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3539 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3540 ieee80211_beacon_connection_loss_work
);
3541 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3542 ieee80211_csa_connection_drop_work
);
3543 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
3544 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3545 (unsigned long) sdata
);
3546 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3547 (unsigned long) sdata
);
3548 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3549 (unsigned long) sdata
);
3550 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3551 (unsigned long) sdata
);
3554 ifmgd
->powersave
= sdata
->wdev
.ps
;
3555 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
3556 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
3557 ifmgd
->p2p_noa_index
= -1;
3559 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3560 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3562 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3565 /* scan finished notification */
3566 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3568 struct ieee80211_sub_if_data
*sdata
;
3570 /* Restart STA timers */
3572 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3573 if (ieee80211_sdata_running(sdata
))
3574 ieee80211_restart_sta_timer(sdata
);
3579 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3580 unsigned long data
, void *dummy
)
3582 s32 latency_usec
= (s32
) data
;
3583 struct ieee80211_local
*local
=
3584 container_of(nb
, struct ieee80211_local
,
3585 network_latency_notifier
);
3587 mutex_lock(&local
->iflist_mtx
);
3588 ieee80211_recalc_ps(local
, latency_usec
);
3589 mutex_unlock(&local
->iflist_mtx
);
3594 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3595 struct cfg80211_bss
*cbss
)
3597 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3598 const u8
*ht_cap_ie
, *vht_cap_ie
;
3599 const struct ieee80211_ht_cap
*ht_cap
;
3600 const struct ieee80211_vht_cap
*vht_cap
;
3603 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3606 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3607 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3608 ht_cap
= (void *)(ht_cap_ie
+ 2);
3609 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3611 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3612 * "Tx Unequal Modulation Supported" fields.
3616 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3619 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3620 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3624 vht_cap
= (void *)(vht_cap_ie
+ 2);
3625 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3626 for (nss
= 8; nss
> 0; nss
--) {
3627 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3628 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3631 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3632 chains
= max(chains
, nss
);
3638 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3639 struct cfg80211_bss
*cbss
)
3641 struct ieee80211_local
*local
= sdata
->local
;
3642 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3643 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3644 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3645 struct ieee80211_supported_band
*sband
;
3646 struct cfg80211_chan_def chandef
;
3649 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3651 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3652 IEEE80211_STA_DISABLE_80P80MHZ
|
3653 IEEE80211_STA_DISABLE_160MHZ
);
3657 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3658 sband
->ht_cap
.ht_supported
) {
3659 const u8
*ht_oper_ie
, *ht_cap
;
3661 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3662 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3663 ht_oper
= (void *)(ht_oper_ie
+ 2);
3665 ht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3666 if (!ht_cap
|| ht_cap
[1] < sizeof(struct ieee80211_ht_cap
)) {
3667 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3672 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3673 sband
->vht_cap
.vht_supported
) {
3674 const u8
*vht_oper_ie
, *vht_cap
;
3676 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3677 WLAN_EID_VHT_OPERATION
);
3678 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3679 vht_oper
= (void *)(vht_oper_ie
+ 2);
3680 if (vht_oper
&& !ht_oper
) {
3683 "AP advertised VHT without HT, disabling both\n");
3684 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3685 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3688 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3689 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
3690 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3695 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3700 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3705 /* will change later if needed */
3706 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3708 mutex_lock(&local
->mtx
);
3710 * If this fails (possibly due to channel context sharing
3711 * on incompatible channels, e.g. 80+80 and 160 sharing the
3712 * same control channel) try to use a smaller bandwidth.
3714 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3715 IEEE80211_CHANCTX_SHARED
);
3717 /* don't downgrade for 5 and 10 MHz channels, though. */
3718 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
3719 chandef
.width
== NL80211_CHAN_WIDTH_10
)
3722 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
3723 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
3724 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3725 IEEE80211_CHANCTX_SHARED
);
3728 mutex_unlock(&local
->mtx
);
3732 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3733 struct cfg80211_bss
*cbss
, bool assoc
)
3735 struct ieee80211_local
*local
= sdata
->local
;
3736 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3737 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3738 struct sta_info
*new_sta
= NULL
;
3739 bool have_sta
= false;
3742 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3747 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3752 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3757 u32 rates
= 0, basic_rates
= 0;
3758 bool have_higher_than_11mbit
;
3759 int min_rate
= INT_MAX
, min_rate_index
= -1;
3760 struct ieee80211_chanctx_conf
*chanctx_conf
;
3761 struct ieee80211_supported_band
*sband
;
3762 const struct cfg80211_bss_ies
*ies
;
3766 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3768 err
= ieee80211_prep_channel(sdata
, cbss
);
3770 sta_info_free(local
, new_sta
);
3773 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
3776 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3777 if (WARN_ON(!chanctx_conf
)) {
3779 sta_info_free(local
, new_sta
);
3782 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
3785 ieee80211_get_rates(sband
, bss
->supp_rates
,
3786 bss
->supp_rates_len
,
3787 &rates
, &basic_rates
,
3788 &have_higher_than_11mbit
,
3789 &min_rate
, &min_rate_index
,
3793 * This used to be a workaround for basic rates missing
3794 * in the association response frame. Now that we no
3795 * longer use the basic rates from there, it probably
3796 * doesn't happen any more, but keep the workaround so
3797 * in case some *other* APs are buggy in different ways
3798 * we can connect -- with a warning.
3800 if (!basic_rates
&& min_rate_index
>= 0) {
3802 "No basic rates, using min rate instead\n");
3803 basic_rates
= BIT(min_rate_index
);
3806 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3807 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3809 /* cf. IEEE 802.11 9.2.12 */
3810 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3811 have_higher_than_11mbit
)
3812 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3814 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3816 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3818 /* set timing information */
3819 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3821 ies
= rcu_dereference(cbss
->beacon_ies
);
3825 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3826 sdata
->vif
.bss_conf
.sync_device_ts
=
3827 bss
->device_ts_beacon
;
3828 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
3829 ies
->data
, ies
->len
);
3830 if (tim_ie
&& tim_ie
[1] >= 2)
3831 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
3833 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3834 } else if (!(local
->hw
.flags
&
3835 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
3836 ies
= rcu_dereference(cbss
->proberesp_ies
);
3837 /* must be non-NULL since beacon IEs were NULL */
3838 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3839 sdata
->vif
.bss_conf
.sync_device_ts
=
3840 bss
->device_ts_presp
;
3841 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3843 sdata
->vif
.bss_conf
.sync_tsf
= 0;
3844 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
3845 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3849 /* tell driver about BSSID, basic rates and timing */
3850 ieee80211_bss_info_change_notify(sdata
,
3851 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3852 BSS_CHANGED_BEACON_INT
);
3855 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3857 err
= sta_info_insert(new_sta
);
3861 "failed to insert STA entry for the AP (error %d)\n",
3866 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3872 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3873 struct cfg80211_auth_request
*req
)
3875 struct ieee80211_local
*local
= sdata
->local
;
3876 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3877 struct ieee80211_mgd_auth_data
*auth_data
;
3881 /* prepare auth data structure */
3883 switch (req
->auth_type
) {
3884 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3885 auth_alg
= WLAN_AUTH_OPEN
;
3887 case NL80211_AUTHTYPE_SHARED_KEY
:
3888 if (IS_ERR(local
->wep_tx_tfm
))
3890 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3892 case NL80211_AUTHTYPE_FT
:
3893 auth_alg
= WLAN_AUTH_FT
;
3895 case NL80211_AUTHTYPE_NETWORK_EAP
:
3896 auth_alg
= WLAN_AUTH_LEAP
;
3898 case NL80211_AUTHTYPE_SAE
:
3899 auth_alg
= WLAN_AUTH_SAE
;
3905 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
3906 req
->ie_len
, GFP_KERNEL
);
3910 auth_data
->bss
= req
->bss
;
3912 if (req
->sae_data_len
>= 4) {
3913 __le16
*pos
= (__le16
*) req
->sae_data
;
3914 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
3915 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
3916 memcpy(auth_data
->data
, req
->sae_data
+ 4,
3917 req
->sae_data_len
- 4);
3918 auth_data
->data_len
+= req
->sae_data_len
- 4;
3921 if (req
->ie
&& req
->ie_len
) {
3922 memcpy(&auth_data
->data
[auth_data
->data_len
],
3923 req
->ie
, req
->ie_len
);
3924 auth_data
->data_len
+= req
->ie_len
;
3927 if (req
->key
&& req
->key_len
) {
3928 auth_data
->key_len
= req
->key_len
;
3929 auth_data
->key_idx
= req
->key_idx
;
3930 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3933 auth_data
->algorithm
= auth_alg
;
3935 /* try to authenticate/probe */
3937 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3938 ifmgd
->assoc_data
) {
3943 if (ifmgd
->auth_data
)
3944 ieee80211_destroy_auth_data(sdata
, false);
3946 /* prep auth_data so we don't go into idle on disassoc */
3947 ifmgd
->auth_data
= auth_data
;
3949 if (ifmgd
->associated
) {
3950 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3952 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3953 WLAN_REASON_UNSPECIFIED
,
3956 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3960 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3962 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3966 err
= ieee80211_probe_auth(sdata
);
3968 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3972 /* hold our own reference */
3973 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
3977 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3978 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3979 ifmgd
->auth_data
= NULL
;
3985 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data
*sdata
,
3986 const u8
*wmm_param
, int len
)
3994 if (wmm_param
[5] != 1 /* version */)
3997 pos
= wmm_param
+ 8;
4000 for (; left
>= 4; left
-= 4, pos
+= 4) {
4001 u8 aifsn
= pos
[0] & 0x0f;
4002 u8 ecwmin
= pos
[1] & 0x0f;
4003 u8 ecwmax
= (pos
[1] & 0xf0) >> 4;
4004 int aci
= (pos
[0] >> 5) & 0x03;
4008 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4012 if (ecwmin
> ecwmax
) {
4014 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4015 ecwmin
, ecwmax
, aci
);
4023 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4024 struct cfg80211_assoc_request
*req
)
4026 struct ieee80211_local
*local
= sdata
->local
;
4027 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4028 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4029 struct ieee80211_mgd_assoc_data
*assoc_data
;
4030 const struct cfg80211_bss_ies
*beacon_ies
;
4031 struct ieee80211_supported_band
*sband
;
4032 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4035 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4040 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4046 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4047 assoc_data
->ssid_len
= ssidie
[1];
4050 if (ifmgd
->associated
) {
4051 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4053 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4054 WLAN_REASON_UNSPECIFIED
,
4057 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4061 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4066 if (ifmgd
->assoc_data
) {
4071 if (ifmgd
->auth_data
) {
4074 /* keep sta info, bssid if matching */
4075 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4076 ieee80211_destroy_auth_data(sdata
, match
);
4079 /* prepare assoc data */
4081 ifmgd
->beacon_crc_valid
= false;
4083 assoc_data
->wmm
= bss
->wmm_used
&&
4084 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4085 if (assoc_data
->wmm
) {
4086 /* try to check validity of WMM params IE */
4087 const struct cfg80211_bss_ies
*ies
;
4088 const u8
*wp
, *start
, *end
;
4091 ies
= rcu_dereference(req
->bss
->ies
);
4093 end
= start
+ ies
->len
;
4096 wp
= cfg80211_find_vendor_ie(
4098 WLAN_OUI_TYPE_MICROSOFT_WMM
,
4099 start
, end
- start
);
4102 start
= wp
+ wp
[1] + 2;
4103 /* if this IE is too short, try the next */
4106 /* if this IE is WMM params, we found what we wanted */
4111 if (!wp
|| !ieee80211_usable_wmm_params(sdata
, wp
+ 2,
4113 assoc_data
->wmm
= false;
4114 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
4120 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4121 * We still associate in non-HT mode (11a/b/g) if any one of these
4122 * ciphers is configured as pairwise.
4123 * We can set this to true for non-11n hardware, that'll be checked
4124 * separately along with the peer capabilities.
4126 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4127 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4128 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4129 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4130 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4131 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4132 netdev_info(sdata
->dev
,
4133 "disabling HT/VHT due to WEP/TKIP use\n");
4137 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4138 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4139 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4142 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4143 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4145 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4146 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4147 if (!sband
->ht_cap
.ht_supported
||
4148 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4149 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4150 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4151 if (!bss
->wmm_used
&&
4152 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4153 netdev_info(sdata
->dev
,
4154 "disabling HT as WMM/QoS is not supported by the AP\n");
4157 /* disable VHT if we don't support it or the AP doesn't use WMM */
4158 if (!sband
->vht_cap
.vht_supported
||
4159 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4160 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4161 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4162 if (!bss
->wmm_used
&&
4163 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4164 netdev_info(sdata
->dev
,
4165 "disabling VHT as WMM/QoS is not supported by the AP\n");
4168 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4169 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4170 sizeof(ifmgd
->ht_capa_mask
));
4172 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4173 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4174 sizeof(ifmgd
->vht_capa_mask
));
4176 if (req
->ie
&& req
->ie_len
) {
4177 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4178 assoc_data
->ie_len
= req
->ie_len
;
4181 assoc_data
->bss
= req
->bss
;
4183 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4184 if (ifmgd
->powersave
)
4185 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4187 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4189 sdata
->smps_mode
= ifmgd
->req_smps
;
4191 assoc_data
->capability
= req
->bss
->capability
;
4192 assoc_data
->supp_rates
= bss
->supp_rates
;
4193 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4196 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4197 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4198 assoc_data
->ap_ht_param
=
4199 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4201 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4202 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4203 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4204 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4205 sizeof(struct ieee80211_vht_cap
));
4207 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4210 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4211 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
) &&
4212 sdata
->wmm_acm
!= 0xff) {
4213 assoc_data
->uapsd
= true;
4214 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4216 assoc_data
->uapsd
= false;
4217 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4220 if (req
->prev_bssid
)
4221 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4224 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4225 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4227 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4228 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4231 if (req
->crypto
.control_port
)
4232 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4234 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4236 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4237 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4238 sdata
->encrypt_headroom
= ieee80211_cs_headroom(local
, &req
->crypto
,
4241 /* kick off associate process */
4243 ifmgd
->assoc_data
= assoc_data
;
4244 ifmgd
->dtim_period
= 0;
4245 ifmgd
->have_beacon
= false;
4247 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4252 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4254 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4257 * Wait up to one beacon interval ...
4258 * should this be more if we miss one?
4260 sdata_info(sdata
, "waiting for beacon from %pM\n",
4262 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4263 assoc_data
->timeout_started
= true;
4264 assoc_data
->need_beacon
= true;
4265 } else if (beacon_ies
) {
4266 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4271 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4272 const struct ieee80211_tim_ie
*tim
;
4273 tim
= (void *)(tim_ie
+ 2);
4274 ifmgd
->dtim_period
= tim
->dtim_period
;
4275 dtim_count
= tim
->dtim_count
;
4277 ifmgd
->have_beacon
= true;
4278 assoc_data
->timeout
= jiffies
;
4279 assoc_data
->timeout_started
= true;
4281 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4282 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4283 sdata
->vif
.bss_conf
.sync_device_ts
=
4284 bss
->device_ts_beacon
;
4285 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4288 assoc_data
->timeout
= jiffies
;
4289 assoc_data
->timeout_started
= true;
4293 run_again(sdata
, assoc_data
->timeout
);
4295 if (bss
->corrupt_data
) {
4296 char *corrupt_type
= "data";
4297 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4298 if (bss
->corrupt_data
&
4299 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4300 corrupt_type
= "beacon and probe response";
4302 corrupt_type
= "beacon";
4303 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4304 corrupt_type
= "probe response";
4305 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4311 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4312 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4313 ifmgd
->assoc_data
= NULL
;
4319 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4320 struct cfg80211_deauth_request
*req
)
4322 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4323 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4324 bool tx
= !req
->local_state_change
;
4325 bool report_frame
= false;
4328 "deauthenticating from %pM by local choice (reason=%d)\n",
4329 req
->bssid
, req
->reason_code
);
4331 if (ifmgd
->auth_data
) {
4332 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4333 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4334 IEEE80211_STYPE_DEAUTH
,
4335 req
->reason_code
, tx
,
4337 ieee80211_destroy_auth_data(sdata
, false);
4339 report_frame
= true;
4343 if (ifmgd
->associated
&&
4344 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4345 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4346 req
->reason_code
, tx
, frame_buf
);
4347 report_frame
= true;
4352 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4353 IEEE80211_DEAUTH_FRAME_LEN
);
4358 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4359 struct cfg80211_disassoc_request
*req
)
4361 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4363 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4366 * cfg80211 should catch this ... but it's racy since
4367 * we can receive a disassoc frame, process it, hand it
4368 * to cfg80211 while that's in a locked section already
4369 * trying to tell us that the user wants to disconnect.
4371 if (ifmgd
->associated
!= req
->bss
)
4375 "disassociating from %pM by local choice (reason=%d)\n",
4376 req
->bss
->bssid
, req
->reason_code
);
4378 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4379 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4380 req
->reason_code
, !req
->local_state_change
,
4383 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4384 IEEE80211_DEAUTH_FRAME_LEN
);
4389 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4391 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4394 * Make sure some work items will not run after this,
4395 * they will not do anything but might not have been
4396 * cancelled when disconnecting.
4398 cancel_work_sync(&ifmgd
->monitor_work
);
4399 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4400 cancel_work_sync(&ifmgd
->request_smps_work
);
4401 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4402 cancel_work_sync(&ifmgd
->chswitch_work
);
4405 if (ifmgd
->assoc_data
) {
4406 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
4407 ieee80211_destroy_assoc_data(sdata
, false);
4408 cfg80211_assoc_timeout(sdata
->dev
, bss
);
4410 if (ifmgd
->auth_data
)
4411 ieee80211_destroy_auth_data(sdata
, false);
4412 del_timer_sync(&ifmgd
->timer
);
4413 sdata_unlock(sdata
);
4416 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4417 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4420 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4422 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4424 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4426 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);