2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 Intel Deutschland GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
44 static int max_nullfunc_tries
= 2;
45 module_param(max_nullfunc_tries
, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries
,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49 static int max_probe_tries
= 5;
50 module_param(max_probe_tries
, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries
,
52 "Maximum probe tries before disconnecting (reason 4).");
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
62 static int beacon_loss_count
= 7;
63 module_param(beacon_loss_count
, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count
,
65 "Number of beacon intervals before we decide beacon was lost.");
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
77 static int probe_wait_ms
= 500;
78 module_param(probe_wait_ms
, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms
,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
84 * How many Beacon frames need to have been used in average signal strength
85 * before starting to indicate signal change events.
87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90 * We can have multiple work items (and connection probing)
91 * scheduling this timer, but we need to take care to only
92 * reschedule it when it should fire _earlier_ than it was
93 * asked for before, or if it's not pending right now. This
94 * function ensures that. Note that it then is required to
95 * run this function for all timeouts after the first one
96 * has happened -- the work that runs from this timer will
99 static void run_again(struct ieee80211_sub_if_data
*sdata
,
100 unsigned long timeout
)
102 sdata_assert_lock(sdata
);
104 if (!timer_pending(&sdata
->u
.mgd
.timer
) ||
105 time_before(timeout
, sdata
->u
.mgd
.timer
.expires
))
106 mod_timer(&sdata
->u
.mgd
.timer
, timeout
);
109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
111 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
114 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
117 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
118 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
123 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
125 if (unlikely(!sdata
->u
.mgd
.associated
))
128 ifmgd
->probe_send_count
= 0;
130 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
133 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
134 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
137 static int ecw2cw(int ecw
)
139 return (1 << ecw
) - 1;
143 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
144 struct ieee80211_supported_band
*sband
,
145 struct ieee80211_channel
*channel
,
146 const struct ieee80211_ht_cap
*ht_cap
,
147 const struct ieee80211_ht_operation
*ht_oper
,
148 const struct ieee80211_vht_operation
*vht_oper
,
149 struct cfg80211_chan_def
*chandef
, bool tracking
)
151 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
152 struct cfg80211_chan_def vht_chandef
;
153 struct ieee80211_sta_ht_cap sta_ht_cap
;
156 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
157 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
159 chandef
->chan
= channel
;
160 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
161 chandef
->center_freq1
= channel
->center_freq
;
162 chandef
->center_freq2
= 0;
164 if (!ht_cap
|| !ht_oper
|| !sta_ht_cap
.ht_supported
) {
165 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
169 chandef
->width
= NL80211_CHAN_WIDTH_20
;
171 if (!(ht_cap
->cap_info
&
172 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
))) {
173 ret
= IEEE80211_STA_DISABLE_40MHZ
;
174 vht_chandef
= *chandef
;
178 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
180 /* check that channel matches the right operating channel */
181 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
183 * It's possible that some APs are confused here;
184 * Netgear WNDR3700 sometimes reports 4 higher than
185 * the actual channel in association responses, but
186 * since we look at probe response/beacon data here
190 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
191 channel
->center_freq
, ht_cfreq
,
192 ht_oper
->primary_chan
, channel
->band
);
193 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
197 /* check 40 MHz support, if we have it */
198 if (sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
199 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
200 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
201 chandef
->width
= NL80211_CHAN_WIDTH_40
;
202 chandef
->center_freq1
+= 10;
204 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
205 chandef
->width
= NL80211_CHAN_WIDTH_40
;
206 chandef
->center_freq1
-= 10;
210 /* 40 MHz (and 80 MHz) must be supported for VHT */
211 ret
= IEEE80211_STA_DISABLE_VHT
;
212 /* also mark 40 MHz disabled */
213 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
217 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
218 ret
= IEEE80211_STA_DISABLE_VHT
;
222 vht_chandef
.chan
= channel
;
223 vht_chandef
.center_freq1
=
224 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
226 vht_chandef
.center_freq2
= 0;
228 switch (vht_oper
->chan_width
) {
229 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
230 vht_chandef
.width
= chandef
->width
;
231 vht_chandef
.center_freq1
= chandef
->center_freq1
;
233 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
234 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
236 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
237 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
239 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
240 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
241 vht_chandef
.center_freq2
=
242 ieee80211_channel_to_frequency(
243 vht_oper
->center_freq_seg2_idx
,
247 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
249 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
250 vht_oper
->chan_width
);
251 ret
= IEEE80211_STA_DISABLE_VHT
;
255 if (!cfg80211_chandef_valid(&vht_chandef
)) {
256 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
258 "AP VHT information is invalid, disable VHT\n");
259 ret
= IEEE80211_STA_DISABLE_VHT
;
263 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
268 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
269 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
271 "AP VHT information doesn't match HT, disable VHT\n");
272 ret
= IEEE80211_STA_DISABLE_VHT
;
276 *chandef
= vht_chandef
;
282 * When tracking the current AP, don't do any further checks if the
283 * new chandef is identical to the one we're currently using for the
284 * connection. This keeps us from playing ping-pong with regulatory,
285 * without it the following can happen (for example):
286 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
287 * - AP advertises regdom US
288 * - CRDA loads regdom US with 80 MHz prohibited (old database)
289 * - the code below detects an unsupported channel, downgrades, and
290 * we disconnect from the AP in the caller
291 * - disconnect causes CRDA to reload world regdomain and the game
293 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
295 * It seems possible that there are still scenarios with CSA or real
296 * bandwidth changes where a this could happen, but those cases are
297 * less common and wouldn't completely prevent using the AP.
300 cfg80211_chandef_identical(chandef
, &sdata
->vif
.bss_conf
.chandef
))
303 /* don't print the message below for VHT mismatch if VHT is disabled */
304 if (ret
& IEEE80211_STA_DISABLE_VHT
)
305 vht_chandef
= *chandef
;
308 * Ignore the DISABLED flag when we're already connected and only
309 * tracking the APs beacon for bandwidth changes - otherwise we
310 * might get disconnected here if we connect to an AP, update our
311 * regulatory information based on the AP's country IE and the
312 * information we have is wrong/outdated and disables the channel
313 * that we're actually using for the connection to the AP.
315 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
317 IEEE80211_CHAN_DISABLED
)) {
318 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
319 ret
= IEEE80211_STA_DISABLE_HT
|
320 IEEE80211_STA_DISABLE_VHT
;
324 ret
|= ieee80211_chandef_downgrade(chandef
);
327 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
329 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
331 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
335 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
336 struct sta_info
*sta
,
337 const struct ieee80211_ht_cap
*ht_cap
,
338 const struct ieee80211_ht_operation
*ht_oper
,
339 const struct ieee80211_vht_operation
*vht_oper
,
340 const u8
*bssid
, u32
*changed
)
342 struct ieee80211_local
*local
= sdata
->local
;
343 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
344 struct ieee80211_supported_band
*sband
;
345 struct ieee80211_channel
*chan
;
346 struct cfg80211_chan_def chandef
;
349 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
352 /* if HT was/is disabled, don't track any bandwidth changes */
353 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
356 /* don't check VHT if we associated as non-VHT station */
357 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
360 if (WARN_ON_ONCE(!sta
))
364 * if bss configuration changed store the new one -
365 * this may be applicable even if channel is identical
367 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
368 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
369 *changed
|= BSS_CHANGED_HT
;
370 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
373 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
374 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
376 /* calculate new channel (type) based on HT/VHT operation IEs */
377 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
,
378 ht_cap
, ht_oper
, vht_oper
,
382 * Downgrade the new channel if we associated with restricted
383 * capabilities. For example, if we associated as a 20 MHz STA
384 * to a 40 MHz AP (due to regulatory, capabilities or config
385 * reasons) then switching to a 40 MHz channel now won't do us
386 * any good -- we couldn't use it with the AP.
388 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
389 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
390 flags
|= ieee80211_chandef_downgrade(&chandef
);
391 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
392 chandef
.width
== NL80211_CHAN_WIDTH_160
)
393 flags
|= ieee80211_chandef_downgrade(&chandef
);
394 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
395 chandef
.width
> NL80211_CHAN_WIDTH_20
)
396 flags
|= ieee80211_chandef_downgrade(&chandef
);
398 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
402 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
403 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
404 chandef
.center_freq1
, chandef
.center_freq2
);
406 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
407 IEEE80211_STA_DISABLE_VHT
|
408 IEEE80211_STA_DISABLE_40MHZ
|
409 IEEE80211_STA_DISABLE_80P80MHZ
|
410 IEEE80211_STA_DISABLE_160MHZ
)) ||
411 !cfg80211_chandef_valid(&chandef
)) {
413 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
418 switch (chandef
.width
) {
419 case NL80211_CHAN_WIDTH_20_NOHT
:
420 case NL80211_CHAN_WIDTH_20
:
421 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
423 case NL80211_CHAN_WIDTH_40
:
424 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
426 case NL80211_CHAN_WIDTH_80
:
427 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
429 case NL80211_CHAN_WIDTH_80P80
:
430 case NL80211_CHAN_WIDTH_160
:
431 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
437 if (new_sta_bw
> sta
->cur_max_bandwidth
)
438 new_sta_bw
= sta
->cur_max_bandwidth
;
440 if (new_sta_bw
< sta
->sta
.bandwidth
) {
441 sta
->sta
.bandwidth
= new_sta_bw
;
442 rate_control_rate_update(local
, sband
, sta
,
443 IEEE80211_RC_BW_CHANGED
);
446 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
449 "AP %pM changed bandwidth to incompatible one - disconnect\n",
454 if (new_sta_bw
> sta
->sta
.bandwidth
) {
455 sta
->sta
.bandwidth
= new_sta_bw
;
456 rate_control_rate_update(local
, sband
, sta
,
457 IEEE80211_RC_BW_CHANGED
);
463 /* frame sending functions */
465 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
466 struct sk_buff
*skb
, u8 ap_ht_param
,
467 struct ieee80211_supported_band
*sband
,
468 struct ieee80211_channel
*channel
,
469 enum ieee80211_smps_mode smps
)
472 u32 flags
= channel
->flags
;
474 struct ieee80211_sta_ht_cap ht_cap
;
476 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
478 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
479 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
481 /* determine capability flags */
484 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
485 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
486 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
487 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
488 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
491 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
492 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
493 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
494 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
500 * If 40 MHz was disabled associate as though we weren't
501 * capable of 40 MHz -- some broken APs will never fall
502 * back to trying to transmit in 20 MHz.
504 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
505 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
506 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
509 /* set SM PS mode properly */
510 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
512 case IEEE80211_SMPS_AUTOMATIC
:
513 case IEEE80211_SMPS_NUM_MODES
:
515 case IEEE80211_SMPS_OFF
:
516 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
517 IEEE80211_HT_CAP_SM_PS_SHIFT
;
519 case IEEE80211_SMPS_STATIC
:
520 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
521 IEEE80211_HT_CAP_SM_PS_SHIFT
;
523 case IEEE80211_SMPS_DYNAMIC
:
524 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
525 IEEE80211_HT_CAP_SM_PS_SHIFT
;
529 /* reserve and fill IE */
530 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
531 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
534 /* This function determines vht capability flags for the association
536 * Note - the function may set the owner of the MU-MIMO capability
538 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
540 struct ieee80211_supported_band
*sband
,
541 struct ieee80211_vht_cap
*ap_vht_cap
)
543 struct ieee80211_local
*local
= sdata
->local
;
546 struct ieee80211_sta_vht_cap vht_cap
;
547 u32 mask
, ap_bf_sts
, our_bf_sts
;
549 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
551 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
552 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
554 /* determine capability flags */
557 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
558 u32 bw
= cap
& IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
560 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
561 if (bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
||
562 bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
)
563 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
566 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
567 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
568 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
572 * Some APs apparently get confused if our capabilities are better
573 * than theirs, so restrict what we advertise in the assoc request.
575 if (!(ap_vht_cap
->vht_cap_info
&
576 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
577 cap
&= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
578 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
);
579 else if (!(ap_vht_cap
->vht_cap_info
&
580 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE
)))
581 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
584 * If some other vif is using the MU-MIMO capablity we cannot associate
585 * using MU-MIMO - this will lead to contradictions in the group-id
587 * Ownership is defined since association request, in order to avoid
588 * simultaneous associations with MU-MIMO.
590 if (cap
& IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
) {
591 bool disable_mu_mimo
= false;
592 struct ieee80211_sub_if_data
*other
;
594 list_for_each_entry_rcu(other
, &local
->interfaces
, list
) {
595 if (other
->flags
& IEEE80211_SDATA_MU_MIMO_OWNER
) {
596 disable_mu_mimo
= true;
601 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
603 sdata
->flags
|= IEEE80211_SDATA_MU_MIMO_OWNER
;
606 mask
= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK
;
608 ap_bf_sts
= le32_to_cpu(ap_vht_cap
->vht_cap_info
) & mask
;
609 our_bf_sts
= cap
& mask
;
611 if (ap_bf_sts
< our_bf_sts
) {
616 /* reserve and fill IE */
617 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
618 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
621 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
623 struct ieee80211_local
*local
= sdata
->local
;
624 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
625 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
627 struct ieee80211_mgmt
*mgmt
;
629 size_t offset
= 0, noffset
;
630 int i
, count
, rates_len
, supp_rates_len
, shift
;
632 struct ieee80211_supported_band
*sband
;
633 struct ieee80211_chanctx_conf
*chanctx_conf
;
634 struct ieee80211_channel
*chan
;
635 u32 rate_flags
, rates
= 0;
637 sdata_assert_lock(sdata
);
640 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
641 if (WARN_ON(!chanctx_conf
)) {
645 chan
= chanctx_conf
->def
.chan
;
646 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
648 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
649 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
651 if (assoc_data
->supp_rates_len
) {
653 * Get all rates supported by the device and the AP as
654 * some APs don't like getting a superset of their rates
655 * in the association request (e.g. D-Link DAP 1353 in
658 rates_len
= ieee80211_parse_bitrates(&chanctx_conf
->def
, sband
,
659 assoc_data
->supp_rates
,
660 assoc_data
->supp_rates_len
,
664 * In case AP not provide any supported rates information
665 * before association, we send information element(s) with
666 * all rates that we support.
669 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
670 if ((rate_flags
& sband
->bitrates
[i
].flags
)
678 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
679 sizeof(*mgmt
) + /* bit too much but doesn't matter */
680 2 + assoc_data
->ssid_len
+ /* SSID */
681 4 + rates_len
+ /* (extended) rates */
682 4 + /* power capability */
683 2 + 2 * sband
->n_channels
+ /* supported channels */
684 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
685 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
686 assoc_data
->ie_len
+ /* extra IEs */
692 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
694 capab
= WLAN_CAPABILITY_ESS
;
696 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
697 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
698 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
701 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
702 capab
|= WLAN_CAPABILITY_PRIVACY
;
704 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
705 ieee80211_hw_check(&local
->hw
, SPECTRUM_MGMT
))
706 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
708 if (ifmgd
->flags
& IEEE80211_STA_ENABLE_RRM
)
709 capab
|= WLAN_CAPABILITY_RADIO_MEASURE
;
711 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
713 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
714 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
715 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
717 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
719 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
720 IEEE80211_STYPE_REASSOC_REQ
);
721 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
722 mgmt
->u
.reassoc_req
.listen_interval
=
723 cpu_to_le16(local
->hw
.conf
.listen_interval
);
724 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
728 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
729 IEEE80211_STYPE_ASSOC_REQ
);
730 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
731 mgmt
->u
.assoc_req
.listen_interval
=
732 cpu_to_le16(local
->hw
.conf
.listen_interval
);
736 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
737 *pos
++ = WLAN_EID_SSID
;
738 *pos
++ = assoc_data
->ssid_len
;
739 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
741 /* add all rates which were marked to be used above */
742 supp_rates_len
= rates_len
;
743 if (supp_rates_len
> 8)
746 pos
= skb_put(skb
, supp_rates_len
+ 2);
747 *pos
++ = WLAN_EID_SUPP_RATES
;
748 *pos
++ = supp_rates_len
;
751 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
752 if (BIT(i
) & rates
) {
753 int rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
761 if (rates_len
> count
) {
762 pos
= skb_put(skb
, rates_len
- count
+ 2);
763 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
764 *pos
++ = rates_len
- count
;
766 for (i
++; i
< sband
->n_bitrates
; i
++) {
767 if (BIT(i
) & rates
) {
769 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
776 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
||
777 capab
& WLAN_CAPABILITY_RADIO_MEASURE
) {
778 pos
= skb_put(skb
, 4);
779 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
781 *pos
++ = 0; /* min tx power */
783 *pos
++ = ieee80211_chandef_max_power(&chanctx_conf
->def
);
786 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
787 /* TODO: get this in reg domain format */
788 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
789 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
790 *pos
++ = 2 * sband
->n_channels
;
791 for (i
= 0; i
< sband
->n_channels
; i
++) {
792 *pos
++ = ieee80211_frequency_to_channel(
793 sband
->channels
[i
].center_freq
);
794 *pos
++ = 1; /* one channel in the subband*/
798 /* if present, add any custom IEs that go before HT */
799 if (assoc_data
->ie_len
) {
800 static const u8 before_ht
[] = {
803 WLAN_EID_EXT_SUPP_RATES
,
804 WLAN_EID_PWR_CAPABILITY
,
805 WLAN_EID_SUPPORTED_CHANNELS
,
808 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
809 WLAN_EID_MOBILITY_DOMAIN
,
810 WLAN_EID_FAST_BSS_TRANSITION
, /* reassoc only */
811 WLAN_EID_RIC_DATA
, /* reassoc only */
812 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
814 static const u8 after_ric
[] = {
815 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
816 WLAN_EID_HT_CAPABILITY
,
817 WLAN_EID_BSS_COEX_2040
,
818 WLAN_EID_EXT_CAPABILITY
,
819 WLAN_EID_QOS_TRAFFIC_CAPA
,
820 WLAN_EID_TIM_BCAST_REQ
,
821 WLAN_EID_INTERWORKING
,
822 /* 60GHz doesn't happen right now */
823 WLAN_EID_VHT_CAPABILITY
,
824 WLAN_EID_OPMODE_NOTIF
,
827 noffset
= ieee80211_ie_split_ric(assoc_data
->ie
,
830 ARRAY_SIZE(before_ht
),
832 ARRAY_SIZE(after_ric
),
834 pos
= skb_put(skb
, noffset
- offset
);
835 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
839 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
840 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
841 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
843 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
844 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
845 sband
, chan
, sdata
->smps_mode
);
847 /* if present, add any custom IEs that go before VHT */
848 if (assoc_data
->ie_len
) {
849 static const u8 before_vht
[] = {
852 WLAN_EID_EXT_SUPP_RATES
,
853 WLAN_EID_PWR_CAPABILITY
,
854 WLAN_EID_SUPPORTED_CHANNELS
,
857 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
858 WLAN_EID_MOBILITY_DOMAIN
,
859 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
860 WLAN_EID_HT_CAPABILITY
,
861 WLAN_EID_BSS_COEX_2040
,
862 WLAN_EID_EXT_CAPABILITY
,
863 WLAN_EID_QOS_TRAFFIC_CAPA
,
864 WLAN_EID_TIM_BCAST_REQ
,
865 WLAN_EID_INTERWORKING
,
868 /* RIC already taken above, so no need to handle here anymore */
869 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
870 before_vht
, ARRAY_SIZE(before_vht
),
872 pos
= skb_put(skb
, noffset
- offset
);
873 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
877 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
878 ieee80211_add_vht_ie(sdata
, skb
, sband
,
879 &assoc_data
->ap_vht_cap
);
881 /* if present, add any custom non-vendor IEs that go after HT */
882 if (assoc_data
->ie_len
) {
883 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
886 pos
= skb_put(skb
, noffset
- offset
);
887 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
891 if (assoc_data
->wmm
) {
892 if (assoc_data
->uapsd
) {
893 qos_info
= ifmgd
->uapsd_queues
;
894 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
895 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
900 pos
= ieee80211_add_wmm_info_ie(skb_put(skb
, 9), qos_info
);
903 /* add any remaining custom (i.e. vendor specific here) IEs */
904 if (assoc_data
->ie_len
) {
905 noffset
= assoc_data
->ie_len
;
906 pos
= skb_put(skb
, noffset
- offset
);
907 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
910 drv_mgd_prepare_tx(local
, sdata
);
912 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
913 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
914 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
915 IEEE80211_TX_INTFL_MLME_CONN_TX
;
916 ieee80211_tx_skb(sdata
, skb
);
919 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
920 struct ieee80211_sub_if_data
*sdata
)
922 struct ieee80211_pspoll
*pspoll
;
925 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
929 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
930 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
932 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
933 ieee80211_tx_skb(sdata
, skb
);
936 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
937 struct ieee80211_sub_if_data
*sdata
,
941 struct ieee80211_hdr_3addr
*nullfunc
;
942 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
944 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
948 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
950 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
952 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
953 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
955 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
956 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
958 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
959 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
961 ieee80211_tx_skb(sdata
, skb
);
964 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
965 struct ieee80211_sub_if_data
*sdata
)
968 struct ieee80211_hdr
*nullfunc
;
971 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
974 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
978 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
980 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
981 memset(nullfunc
, 0, 30);
982 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
983 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
984 nullfunc
->frame_control
= fc
;
985 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
986 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
987 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
988 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
990 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
991 ieee80211_tx_skb(sdata
, skb
);
994 /* spectrum management related things */
995 static void ieee80211_chswitch_work(struct work_struct
*work
)
997 struct ieee80211_sub_if_data
*sdata
=
998 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
999 struct ieee80211_local
*local
= sdata
->local
;
1000 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1003 if (!ieee80211_sdata_running(sdata
))
1007 mutex_lock(&local
->mtx
);
1008 mutex_lock(&local
->chanctx_mtx
);
1010 if (!ifmgd
->associated
)
1013 if (!sdata
->vif
.csa_active
)
1017 * using reservation isn't immediate as it may be deferred until later
1018 * with multi-vif. once reservation is complete it will re-schedule the
1019 * work with no reserved_chanctx so verify chandef to check if it
1020 * completed successfully
1023 if (sdata
->reserved_chanctx
) {
1025 * with multi-vif csa driver may call ieee80211_csa_finish()
1026 * many times while waiting for other interfaces to use their
1029 if (sdata
->reserved_ready
)
1032 ret
= ieee80211_vif_use_reserved_context(sdata
);
1035 "failed to use reserved channel context, disconnecting (err=%d)\n",
1037 ieee80211_queue_work(&sdata
->local
->hw
,
1038 &ifmgd
->csa_connection_drop_work
);
1045 if (!cfg80211_chandef_identical(&sdata
->vif
.bss_conf
.chandef
,
1046 &sdata
->csa_chandef
)) {
1048 "failed to finalize channel switch, disconnecting\n");
1049 ieee80211_queue_work(&sdata
->local
->hw
,
1050 &ifmgd
->csa_connection_drop_work
);
1054 /* XXX: shouldn't really modify cfg80211-owned data! */
1055 ifmgd
->associated
->channel
= sdata
->csa_chandef
.chan
;
1057 ifmgd
->csa_waiting_bcn
= true;
1059 ieee80211_sta_reset_beacon_monitor(sdata
);
1060 ieee80211_sta_reset_conn_monitor(sdata
);
1063 mutex_unlock(&local
->chanctx_mtx
);
1064 mutex_unlock(&local
->mtx
);
1065 sdata_unlock(sdata
);
1068 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data
*sdata
)
1070 struct ieee80211_local
*local
= sdata
->local
;
1071 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1074 sdata_assert_lock(sdata
);
1076 WARN_ON(!sdata
->vif
.csa_active
);
1078 if (sdata
->csa_block_tx
) {
1079 ieee80211_wake_vif_queues(local
, sdata
,
1080 IEEE80211_QUEUE_STOP_REASON_CSA
);
1081 sdata
->csa_block_tx
= false;
1084 sdata
->vif
.csa_active
= false;
1085 ifmgd
->csa_waiting_bcn
= false;
1087 ret
= drv_post_channel_switch(sdata
);
1090 "driver post channel switch failed, disconnecting\n");
1091 ieee80211_queue_work(&local
->hw
,
1092 &ifmgd
->csa_connection_drop_work
);
1096 cfg80211_ch_switch_notify(sdata
->dev
, &sdata
->reserved_chandef
);
1099 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
1101 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1102 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1104 trace_api_chswitch_done(sdata
, success
);
1107 "driver channel switch failed, disconnecting\n");
1108 ieee80211_queue_work(&sdata
->local
->hw
,
1109 &ifmgd
->csa_connection_drop_work
);
1111 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1114 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1116 static void ieee80211_chswitch_timer(unsigned long data
)
1118 struct ieee80211_sub_if_data
*sdata
=
1119 (struct ieee80211_sub_if_data
*) data
;
1121 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1125 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1126 u64 timestamp
, u32 device_timestamp
,
1127 struct ieee802_11_elems
*elems
,
1130 struct ieee80211_local
*local
= sdata
->local
;
1131 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1132 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1133 struct ieee80211_chanctx_conf
*conf
;
1134 struct ieee80211_chanctx
*chanctx
;
1135 enum ieee80211_band current_band
;
1136 struct ieee80211_csa_ie csa_ie
;
1137 struct ieee80211_channel_switch ch_switch
;
1140 sdata_assert_lock(sdata
);
1145 if (local
->scanning
)
1148 /* disregard subsequent announcements if we are already processing */
1149 if (sdata
->vif
.csa_active
)
1152 current_band
= cbss
->channel
->band
;
1153 memset(&csa_ie
, 0, sizeof(csa_ie
));
1154 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, current_band
,
1156 ifmgd
->associated
->bssid
, &csa_ie
);
1158 ieee80211_queue_work(&local
->hw
,
1159 &ifmgd
->csa_connection_drop_work
);
1163 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
1164 IEEE80211_CHAN_DISABLED
)) {
1166 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1167 ifmgd
->associated
->bssid
,
1168 csa_ie
.chandef
.chan
->center_freq
,
1169 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
1170 csa_ie
.chandef
.center_freq2
);
1171 ieee80211_queue_work(&local
->hw
,
1172 &ifmgd
->csa_connection_drop_work
);
1176 if (cfg80211_chandef_identical(&csa_ie
.chandef
,
1177 &sdata
->vif
.bss_conf
.chandef
)) {
1178 if (ifmgd
->csa_ignored_same_chan
)
1181 "AP %pM tries to chanswitch to same channel, ignore\n",
1182 ifmgd
->associated
->bssid
);
1183 ifmgd
->csa_ignored_same_chan
= true;
1188 * Drop all TDLS peers - either we disconnect or move to a different
1189 * channel from this point on. There's no telling what our peer will do.
1190 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1191 * have an incompatible wider chandef.
1193 ieee80211_teardown_tdls_peers(sdata
);
1195 mutex_lock(&local
->mtx
);
1196 mutex_lock(&local
->chanctx_mtx
);
1197 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1198 lockdep_is_held(&local
->chanctx_mtx
));
1201 "no channel context assigned to vif?, disconnecting\n");
1202 goto drop_connection
;
1205 chanctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1207 if (local
->use_chanctx
&&
1208 !ieee80211_hw_check(&local
->hw
, CHANCTX_STA_CSA
)) {
1210 "driver doesn't support chan-switch with channel contexts\n");
1211 goto drop_connection
;
1214 ch_switch
.timestamp
= timestamp
;
1215 ch_switch
.device_timestamp
= device_timestamp
;
1216 ch_switch
.block_tx
= csa_ie
.mode
;
1217 ch_switch
.chandef
= csa_ie
.chandef
;
1218 ch_switch
.count
= csa_ie
.count
;
1220 if (drv_pre_channel_switch(sdata
, &ch_switch
)) {
1222 "preparing for channel switch failed, disconnecting\n");
1223 goto drop_connection
;
1226 res
= ieee80211_vif_reserve_chanctx(sdata
, &csa_ie
.chandef
,
1227 chanctx
->mode
, false);
1230 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1232 goto drop_connection
;
1234 mutex_unlock(&local
->chanctx_mtx
);
1236 sdata
->vif
.csa_active
= true;
1237 sdata
->csa_chandef
= csa_ie
.chandef
;
1238 sdata
->csa_block_tx
= csa_ie
.mode
;
1239 ifmgd
->csa_ignored_same_chan
= false;
1241 if (sdata
->csa_block_tx
)
1242 ieee80211_stop_vif_queues(local
, sdata
,
1243 IEEE80211_QUEUE_STOP_REASON_CSA
);
1244 mutex_unlock(&local
->mtx
);
1246 cfg80211_ch_switch_started_notify(sdata
->dev
, &csa_ie
.chandef
,
1249 if (local
->ops
->channel_switch
) {
1250 /* use driver's channel switch callback */
1251 drv_channel_switch(local
, sdata
, &ch_switch
);
1255 /* channel switch handled in software */
1256 if (csa_ie
.count
<= 1)
1257 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1259 mod_timer(&ifmgd
->chswitch_timer
,
1260 TU_TO_EXP_TIME((csa_ie
.count
- 1) *
1261 cbss
->beacon_interval
));
1264 ieee80211_queue_work(&local
->hw
, &ifmgd
->csa_connection_drop_work
);
1265 mutex_unlock(&local
->chanctx_mtx
);
1266 mutex_unlock(&local
->mtx
);
1270 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1271 struct ieee80211_channel
*channel
,
1272 const u8
*country_ie
, u8 country_ie_len
,
1273 const u8
*pwr_constr_elem
,
1274 int *chan_pwr
, int *pwr_reduction
)
1276 struct ieee80211_country_ie_triplet
*triplet
;
1277 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1278 int i
, chan_increment
;
1279 bool have_chan_pwr
= false;
1282 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1285 triplet
= (void *)(country_ie
+ 3);
1286 country_ie_len
-= 3;
1288 switch (channel
->band
) {
1292 case IEEE80211_BAND_2GHZ
:
1293 case IEEE80211_BAND_60GHZ
:
1296 case IEEE80211_BAND_5GHZ
:
1302 while (country_ie_len
>= 3) {
1303 u8 first_channel
= triplet
->chans
.first_channel
;
1305 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1308 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1309 if (first_channel
+ i
* chan_increment
== chan
) {
1310 have_chan_pwr
= true;
1311 *chan_pwr
= triplet
->chans
.max_power
;
1320 country_ie_len
-= 3;
1323 if (have_chan_pwr
&& pwr_constr_elem
)
1324 *pwr_reduction
= *pwr_constr_elem
;
1328 return have_chan_pwr
;
1331 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data
*sdata
,
1332 struct ieee80211_channel
*channel
,
1333 const u8
*cisco_dtpc_ie
,
1336 /* From practical testing, the first data byte of the DTPC element
1337 * seems to contain the requested dBm level, and the CLI on Cisco
1338 * APs clearly state the range is -127 to 127 dBm, which indicates
1339 * a signed byte, although it seemingly never actually goes negative.
1340 * The other byte seems to always be zero.
1342 *pwr_level
= (__s8
)cisco_dtpc_ie
[4];
1345 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1346 struct ieee80211_channel
*channel
,
1347 struct ieee80211_mgmt
*mgmt
,
1348 const u8
*country_ie
, u8 country_ie_len
,
1349 const u8
*pwr_constr_ie
,
1350 const u8
*cisco_dtpc_ie
)
1352 bool has_80211h_pwr
= false, has_cisco_pwr
= false;
1353 int chan_pwr
= 0, pwr_reduction_80211h
= 0;
1354 int pwr_level_cisco
, pwr_level_80211h
;
1356 __le16 capab
= mgmt
->u
.probe_resp
.capab_info
;
1359 (capab
& cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
) ||
1360 capab
& cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE
))) {
1361 has_80211h_pwr
= ieee80211_find_80211h_pwr_constr(
1362 sdata
, channel
, country_ie
, country_ie_len
,
1363 pwr_constr_ie
, &chan_pwr
, &pwr_reduction_80211h
);
1365 max_t(int, 0, chan_pwr
- pwr_reduction_80211h
);
1368 if (cisco_dtpc_ie
) {
1369 ieee80211_find_cisco_dtpc(
1370 sdata
, channel
, cisco_dtpc_ie
, &pwr_level_cisco
);
1371 has_cisco_pwr
= true;
1374 if (!has_80211h_pwr
&& !has_cisco_pwr
)
1377 /* If we have both 802.11h and Cisco DTPC, apply both limits
1378 * by picking the smallest of the two power levels advertised.
1380 if (has_80211h_pwr
&&
1381 (!has_cisco_pwr
|| pwr_level_80211h
<= pwr_level_cisco
)) {
1382 new_ap_level
= pwr_level_80211h
;
1384 if (sdata
->ap_power_level
== new_ap_level
)
1388 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1389 pwr_level_80211h
, chan_pwr
, pwr_reduction_80211h
,
1390 sdata
->u
.mgd
.bssid
);
1391 } else { /* has_cisco_pwr is always true here. */
1392 new_ap_level
= pwr_level_cisco
;
1394 if (sdata
->ap_power_level
== new_ap_level
)
1398 "Limiting TX power to %d dBm as advertised by %pM\n",
1399 pwr_level_cisco
, sdata
->u
.mgd
.bssid
);
1402 sdata
->ap_power_level
= new_ap_level
;
1403 if (__ieee80211_recalc_txpower(sdata
))
1404 return BSS_CHANGED_TXPOWER
;
1409 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1410 struct ieee80211_sub_if_data
*sdata
)
1412 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1415 * If we are scanning right now then the parameters will
1416 * take effect when scan finishes.
1418 if (local
->scanning
)
1421 if (conf
->dynamic_ps_timeout
> 0 &&
1422 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
)) {
1423 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1424 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1426 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
))
1427 ieee80211_send_nullfunc(local
, sdata
, true);
1429 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1430 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
1433 conf
->flags
|= IEEE80211_CONF_PS
;
1434 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1438 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1440 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1442 if (local
->ps_sdata
) {
1443 ieee80211_enable_ps(local
, local
->ps_sdata
);
1444 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1445 conf
->flags
&= ~IEEE80211_CONF_PS
;
1446 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1447 del_timer_sync(&local
->dynamic_ps_timer
);
1448 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1452 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1454 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1455 struct sta_info
*sta
= NULL
;
1456 bool authorized
= false;
1458 if (!mgd
->powersave
)
1464 if (!mgd
->associated
)
1467 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1470 if (!mgd
->have_beacon
)
1474 sta
= sta_info_get(sdata
, mgd
->bssid
);
1476 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1482 /* need to hold RTNL or interface lock */
1483 void ieee80211_recalc_ps(struct ieee80211_local
*local
)
1485 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1489 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
)) {
1490 local
->ps_sdata
= NULL
;
1494 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1495 if (!ieee80211_sdata_running(sdata
))
1497 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1498 /* If an AP vif is found, then disable PS
1499 * by setting the count to zero thereby setting
1505 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1511 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1512 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1515 beaconint_us
= ieee80211_tu_to_usec(
1516 found
->vif
.bss_conf
.beacon_int
);
1518 timeout
= local
->dynamic_ps_forced_timeout
;
1521 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1523 /* If the TIM IE is invalid, pretend the value is 1 */
1527 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1528 local
->ps_sdata
= found
;
1530 local
->ps_sdata
= NULL
;
1533 ieee80211_change_ps(local
);
1536 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1538 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1540 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1541 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1542 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1546 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1548 struct ieee80211_local
*local
=
1549 container_of(work
, struct ieee80211_local
,
1550 dynamic_ps_disable_work
);
1552 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1553 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1554 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1557 ieee80211_wake_queues_by_reason(&local
->hw
,
1558 IEEE80211_MAX_QUEUE_MAP
,
1559 IEEE80211_QUEUE_STOP_REASON_PS
,
1563 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1565 struct ieee80211_local
*local
=
1566 container_of(work
, struct ieee80211_local
,
1567 dynamic_ps_enable_work
);
1568 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1569 struct ieee80211_if_managed
*ifmgd
;
1570 unsigned long flags
;
1573 /* can only happen when PS was just disabled anyway */
1577 ifmgd
= &sdata
->u
.mgd
;
1579 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1582 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1583 /* don't enter PS if TX frames are pending */
1584 if (drv_tx_frames_pending(local
)) {
1585 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1587 local
->hw
.conf
.dynamic_ps_timeout
));
1592 * transmission can be stopped by others which leads to
1593 * dynamic_ps_timer expiry. Postpone the ps timer if it
1594 * is not the actual idle state.
1596 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1597 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1598 if (local
->queue_stop_reasons
[q
]) {
1599 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1601 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1603 local
->hw
.conf
.dynamic_ps_timeout
));
1607 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1610 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1611 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1612 if (drv_tx_frames_pending(local
)) {
1613 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1615 local
->hw
.conf
.dynamic_ps_timeout
));
1617 ieee80211_send_nullfunc(local
, sdata
, true);
1618 /* Flush to get the tx status of nullfunc frame */
1619 ieee80211_flush_queues(local
, sdata
, false);
1623 if (!(ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
) &&
1624 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
)) ||
1625 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1626 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1627 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1628 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1632 void ieee80211_dynamic_ps_timer(unsigned long data
)
1634 struct ieee80211_local
*local
= (void *) data
;
1636 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1639 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1641 struct delayed_work
*delayed_work
=
1642 container_of(work
, struct delayed_work
, work
);
1643 struct ieee80211_sub_if_data
*sdata
=
1644 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1645 dfs_cac_timer_work
);
1646 struct cfg80211_chan_def chandef
= sdata
->vif
.bss_conf
.chandef
;
1648 mutex_lock(&sdata
->local
->mtx
);
1649 if (sdata
->wdev
.cac_started
) {
1650 ieee80211_vif_release_channel(sdata
);
1651 cfg80211_cac_event(sdata
->dev
, &chandef
,
1652 NL80211_RADAR_CAC_FINISHED
,
1655 mutex_unlock(&sdata
->local
->mtx
);
1659 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1661 struct ieee80211_local
*local
= sdata
->local
;
1662 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1666 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1669 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1670 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
1672 unsigned long now
= jiffies
;
1674 if (tx_tspec
->action
== TX_TSPEC_ACTION_NONE
&&
1675 tx_tspec
->admitted_time
&&
1676 time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1677 tx_tspec
->consumed_tx_time
= 0;
1678 tx_tspec
->time_slice_start
= now
;
1680 if (tx_tspec
->downgraded
)
1682 TX_TSPEC_ACTION_STOP_DOWNGRADE
;
1685 switch (tx_tspec
->action
) {
1686 case TX_TSPEC_ACTION_STOP_DOWNGRADE
:
1687 /* take the original parameters */
1688 if (drv_conf_tx(local
, sdata
, ac
, &sdata
->tx_conf
[ac
]))
1690 "failed to set TX queue parameters for queue %d\n",
1692 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1693 tx_tspec
->downgraded
= false;
1696 case TX_TSPEC_ACTION_DOWNGRADE
:
1697 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1698 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1702 /* downgrade next lower non-ACM AC */
1703 for (non_acm_ac
= ac
+ 1;
1704 non_acm_ac
< IEEE80211_NUM_ACS
;
1706 if (!(sdata
->wmm_acm
& BIT(7 - 2 * non_acm_ac
)))
1708 /* The loop will result in using BK even if it requires
1709 * admission control, such configuration makes no sense
1710 * and we have to transmit somehow - the AC selection
1711 * does the same thing.
1713 if (drv_conf_tx(local
, sdata
, ac
,
1714 &sdata
->tx_conf
[non_acm_ac
]))
1716 "failed to set TX queue parameters for queue %d\n",
1718 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1720 schedule_delayed_work(&ifmgd
->tx_tspec_wk
,
1721 tx_tspec
->time_slice_start
+ HZ
- now
+ 1);
1723 case TX_TSPEC_ACTION_NONE
:
1732 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1734 if (__ieee80211_sta_handle_tspec_ac_params(sdata
))
1735 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
1738 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct
*work
)
1740 struct ieee80211_sub_if_data
*sdata
;
1742 sdata
= container_of(work
, struct ieee80211_sub_if_data
,
1743 u
.mgd
.tx_tspec_wk
.work
);
1744 ieee80211_sta_handle_tspec_ac_params(sdata
);
1748 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1749 struct ieee80211_sub_if_data
*sdata
,
1750 const u8
*wmm_param
, size_t wmm_param_len
)
1752 struct ieee80211_tx_queue_params params
[IEEE80211_NUM_ACS
];
1753 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1757 u8 uapsd_queues
= 0;
1759 if (!local
->ops
->conf_tx
)
1762 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1768 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1771 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1772 uapsd_queues
= ifmgd
->uapsd_queues
;
1774 count
= wmm_param
[6] & 0x0f;
1775 if (count
== ifmgd
->wmm_last_param_set
)
1777 ifmgd
->wmm_last_param_set
= count
;
1779 pos
= wmm_param
+ 8;
1780 left
= wmm_param_len
- 8;
1782 memset(¶ms
, 0, sizeof(params
));
1785 for (; left
>= 4; left
-= 4, pos
+= 4) {
1786 int aci
= (pos
[0] >> 5) & 0x03;
1787 int acm
= (pos
[0] >> 4) & 0x01;
1792 ac
= IEEE80211_AC_BK
;
1794 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1795 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1799 ac
= IEEE80211_AC_VI
;
1801 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1802 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1806 ac
= IEEE80211_AC_VO
;
1808 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1809 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1814 ac
= IEEE80211_AC_BE
;
1816 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1817 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1822 params
[ac
].aifs
= pos
[0] & 0x0f;
1824 if (params
[ac
].aifs
< 2) {
1826 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1827 params
[ac
].aifs
, aci
);
1828 params
[ac
].aifs
= 2;
1830 params
[ac
].cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1831 params
[ac
].cw_min
= ecw2cw(pos
[1] & 0x0f);
1832 params
[ac
].txop
= get_unaligned_le16(pos
+ 2);
1833 params
[ac
].acm
= acm
;
1834 params
[ac
].uapsd
= uapsd
;
1836 if (params
[ac
].cw_min
> params
[ac
].cw_max
) {
1838 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1839 params
[ac
].cw_min
, params
[ac
].cw_max
, aci
);
1844 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1846 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1848 params
[ac
].aifs
, params
[ac
].cw_min
, params
[ac
].cw_max
,
1849 params
[ac
].txop
, params
[ac
].uapsd
,
1850 ifmgd
->tx_tspec
[ac
].downgraded
);
1851 sdata
->tx_conf
[ac
] = params
[ac
];
1852 if (!ifmgd
->tx_tspec
[ac
].downgraded
&&
1853 drv_conf_tx(local
, sdata
, ac
, ¶ms
[ac
]))
1855 "failed to set TX queue parameters for AC %d\n",
1859 /* enable WMM or activate new settings */
1860 sdata
->vif
.bss_conf
.qos
= true;
1864 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1866 lockdep_assert_held(&sdata
->local
->mtx
);
1868 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1869 ieee80211_run_deferred_scan(sdata
->local
);
1872 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1874 mutex_lock(&sdata
->local
->mtx
);
1875 __ieee80211_stop_poll(sdata
);
1876 mutex_unlock(&sdata
->local
->mtx
);
1879 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1880 u16 capab
, bool erp_valid
, u8 erp
)
1882 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1884 bool use_protection
;
1885 bool use_short_preamble
;
1886 bool use_short_slot
;
1889 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1890 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1892 use_protection
= false;
1893 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1896 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1897 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1898 use_short_slot
= true;
1900 if (use_protection
!= bss_conf
->use_cts_prot
) {
1901 bss_conf
->use_cts_prot
= use_protection
;
1902 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1905 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1906 bss_conf
->use_short_preamble
= use_short_preamble
;
1907 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1910 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1911 bss_conf
->use_short_slot
= use_short_slot
;
1912 changed
|= BSS_CHANGED_ERP_SLOT
;
1918 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1919 struct cfg80211_bss
*cbss
,
1920 u32 bss_info_changed
)
1922 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1923 struct ieee80211_local
*local
= sdata
->local
;
1924 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1926 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1927 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1928 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1930 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1931 beacon_loss_count
* bss_conf
->beacon_int
));
1933 sdata
->u
.mgd
.associated
= cbss
;
1934 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1936 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1938 if (sdata
->vif
.p2p
||
1939 sdata
->vif
.driver_flags
& IEEE80211_VIF_GET_NOA_UPDATE
) {
1940 const struct cfg80211_bss_ies
*ies
;
1943 ies
= rcu_dereference(cbss
->ies
);
1947 ret
= cfg80211_get_p2p_attr(
1948 ies
->data
, ies
->len
,
1949 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1950 (u8
*) &bss_conf
->p2p_noa_attr
,
1951 sizeof(bss_conf
->p2p_noa_attr
));
1953 sdata
->u
.mgd
.p2p_noa_index
=
1954 bss_conf
->p2p_noa_attr
.index
;
1955 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1961 /* just to be sure */
1962 ieee80211_stop_poll(sdata
);
1964 ieee80211_led_assoc(local
, 1);
1966 if (sdata
->u
.mgd
.have_beacon
) {
1968 * If the AP is buggy we may get here with no DTIM period
1969 * known, so assume it's 1 which is the only safe assumption
1970 * in that case, although if the TIM IE is broken powersave
1971 * probably just won't work at all.
1973 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1974 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1975 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1977 bss_conf
->beacon_rate
= NULL
;
1978 bss_conf
->dtim_period
= 0;
1981 bss_conf
->assoc
= 1;
1983 /* Tell the driver to monitor connection quality (if supported) */
1984 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1985 bss_conf
->cqm_rssi_thold
)
1986 bss_info_changed
|= BSS_CHANGED_CQM
;
1988 /* Enable ARP filtering */
1989 if (bss_conf
->arp_addr_cnt
)
1990 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1992 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1994 mutex_lock(&local
->iflist_mtx
);
1995 ieee80211_recalc_ps(local
);
1996 mutex_unlock(&local
->iflist_mtx
);
1998 ieee80211_recalc_smps(sdata
);
1999 ieee80211_recalc_ps_vif(sdata
);
2001 netif_carrier_on(sdata
->dev
);
2004 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
2005 u16 stype
, u16 reason
, bool tx
,
2008 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2009 struct ieee80211_local
*local
= sdata
->local
;
2012 sdata_assert_lock(sdata
);
2014 if (WARN_ON_ONCE(tx
&& !frame_buf
))
2017 if (WARN_ON(!ifmgd
->associated
))
2020 ieee80211_stop_poll(sdata
);
2022 ifmgd
->associated
= NULL
;
2023 netif_carrier_off(sdata
->dev
);
2026 * if we want to get out of ps before disassoc (why?) we have
2027 * to do it before sending disassoc, as otherwise the null-packet
2030 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2031 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2032 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2034 local
->ps_sdata
= NULL
;
2036 /* disable per-vif ps */
2037 ieee80211_recalc_ps_vif(sdata
);
2039 /* make sure ongoing transmission finishes */
2043 * drop any frame before deauth/disassoc, this can be data or
2044 * management frame. Since we are disconnecting, we should not
2045 * insist sending these frames which can take time and delay
2046 * the disconnection and possible the roaming.
2049 ieee80211_flush_queues(local
, sdata
, true);
2051 /* deauthenticate/disassociate now */
2052 if (tx
|| frame_buf
)
2053 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
2054 reason
, tx
, frame_buf
);
2056 /* flush out frame - make sure the deauth was actually sent */
2058 ieee80211_flush_queues(local
, sdata
, false);
2060 /* clear bssid only after building the needed mgmt frames */
2061 eth_zero_addr(ifmgd
->bssid
);
2063 /* remove AP and TDLS peers */
2064 sta_info_flush(sdata
);
2066 /* finally reset all BSS / config parameters */
2067 changed
|= ieee80211_reset_erp_info(sdata
);
2069 ieee80211_led_assoc(local
, 0);
2070 changed
|= BSS_CHANGED_ASSOC
;
2071 sdata
->vif
.bss_conf
.assoc
= false;
2073 ifmgd
->p2p_noa_index
= -1;
2074 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
2075 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
2077 /* on the next assoc, re-program HT/VHT parameters */
2078 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
2079 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
2080 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
2081 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
2082 sdata
->flags
&= ~IEEE80211_SDATA_MU_MIMO_OWNER
;
2084 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
2086 del_timer_sync(&local
->dynamic_ps_timer
);
2087 cancel_work_sync(&local
->dynamic_ps_enable_work
);
2089 /* Disable ARP filtering */
2090 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
2091 changed
|= BSS_CHANGED_ARP_FILTER
;
2093 sdata
->vif
.bss_conf
.qos
= false;
2094 changed
|= BSS_CHANGED_QOS
;
2096 /* The BSSID (not really interesting) and HT changed */
2097 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
2098 ieee80211_bss_info_change_notify(sdata
, changed
);
2100 /* disassociated - set to defaults now */
2101 ieee80211_set_wmm_default(sdata
, false, false);
2103 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
2104 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
2105 del_timer_sync(&sdata
->u
.mgd
.timer
);
2106 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
2108 sdata
->vif
.bss_conf
.dtim_period
= 0;
2109 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
2111 ifmgd
->have_beacon
= false;
2114 mutex_lock(&local
->mtx
);
2115 ieee80211_vif_release_channel(sdata
);
2117 sdata
->vif
.csa_active
= false;
2118 ifmgd
->csa_waiting_bcn
= false;
2119 ifmgd
->csa_ignored_same_chan
= false;
2120 if (sdata
->csa_block_tx
) {
2121 ieee80211_wake_vif_queues(local
, sdata
,
2122 IEEE80211_QUEUE_STOP_REASON_CSA
);
2123 sdata
->csa_block_tx
= false;
2125 mutex_unlock(&local
->mtx
);
2127 /* existing TX TSPEC sessions no longer exist */
2128 memset(ifmgd
->tx_tspec
, 0, sizeof(ifmgd
->tx_tspec
));
2129 cancel_delayed_work_sync(&ifmgd
->tx_tspec_wk
);
2131 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2134 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
2135 struct ieee80211_hdr
*hdr
)
2138 * We can postpone the mgd.timer whenever receiving unicast frames
2139 * from AP because we know that the connection is working both ways
2140 * at that time. But multicast frames (and hence also beacons) must
2141 * be ignored here, because we need to trigger the timer during
2142 * data idle periods for sending the periodic probe request to the
2143 * AP we're connected to.
2145 if (is_multicast_ether_addr(hdr
->addr1
))
2148 ieee80211_sta_reset_conn_monitor(sdata
);
2151 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
2153 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2154 struct ieee80211_local
*local
= sdata
->local
;
2156 mutex_lock(&local
->mtx
);
2157 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
2160 __ieee80211_stop_poll(sdata
);
2162 mutex_lock(&local
->iflist_mtx
);
2163 ieee80211_recalc_ps(local
);
2164 mutex_unlock(&local
->iflist_mtx
);
2166 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
2170 * We've received a probe response, but are not sure whether
2171 * we have or will be receiving any beacons or data, so let's
2172 * schedule the timers again, just in case.
2174 ieee80211_sta_reset_beacon_monitor(sdata
);
2176 mod_timer(&ifmgd
->conn_mon_timer
,
2177 round_jiffies_up(jiffies
+
2178 IEEE80211_CONNECTION_IDLE_TIME
));
2180 mutex_unlock(&local
->mtx
);
2183 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data
*sdata
,
2184 struct ieee80211_hdr
*hdr
,
2187 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2188 u16 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
2189 int ac
= ieee80211_ac_from_tid(tid
);
2190 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
2191 unsigned long now
= jiffies
;
2193 if (likely(!tx_tspec
->admitted_time
))
2196 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
2197 tx_tspec
->consumed_tx_time
= 0;
2198 tx_tspec
->time_slice_start
= now
;
2200 if (tx_tspec
->downgraded
) {
2201 tx_tspec
->action
= TX_TSPEC_ACTION_STOP_DOWNGRADE
;
2202 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2206 if (tx_tspec
->downgraded
)
2209 tx_tspec
->consumed_tx_time
+= tx_time
;
2211 if (tx_tspec
->consumed_tx_time
>= tx_tspec
->admitted_time
) {
2212 tx_tspec
->downgraded
= true;
2213 tx_tspec
->action
= TX_TSPEC_ACTION_DOWNGRADE
;
2214 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2218 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
2219 struct ieee80211_hdr
*hdr
, bool ack
, u16 tx_time
)
2221 ieee80211_sta_tx_wmm_ac_notify(sdata
, hdr
, tx_time
);
2223 if (!ieee80211_is_data(hdr
->frame_control
))
2226 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
2227 sdata
->u
.mgd
.probe_send_count
> 0) {
2229 ieee80211_sta_reset_conn_monitor(sdata
);
2231 sdata
->u
.mgd
.nullfunc_failed
= true;
2232 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2237 ieee80211_sta_reset_conn_monitor(sdata
);
2240 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2242 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2244 u8
*dst
= ifmgd
->associated
->bssid
;
2245 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2248 * Try sending broadcast probe requests for the last three
2249 * probe requests after the first ones failed since some
2250 * buggy APs only support broadcast probe requests.
2252 if (ifmgd
->probe_send_count
>= unicast_limit
)
2256 * When the hardware reports an accurate Tx ACK status, it's
2257 * better to send a nullfunc frame instead of a probe request,
2258 * as it will kick us off the AP quickly if we aren't associated
2259 * anymore. The timeout will be reset if the frame is ACKed by
2262 ifmgd
->probe_send_count
++;
2264 if (ieee80211_hw_check(&sdata
->local
->hw
, REPORTS_TX_ACK_STATUS
)) {
2265 ifmgd
->nullfunc_failed
= false;
2266 ieee80211_send_nullfunc(sdata
->local
, sdata
, false);
2271 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2272 if (WARN_ON_ONCE(ssid
== NULL
))
2277 ieee80211_send_probe_req(sdata
, sdata
->vif
.addr
, dst
,
2278 ssid
+ 2, ssid_len
, NULL
,
2279 0, (u32
) -1, true, 0,
2280 ifmgd
->associated
->channel
, false);
2284 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2285 run_again(sdata
, ifmgd
->probe_timeout
);
2288 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2291 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2292 bool already
= false;
2294 if (!ieee80211_sdata_running(sdata
))
2299 if (!ifmgd
->associated
)
2302 mutex_lock(&sdata
->local
->mtx
);
2304 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2305 mutex_unlock(&sdata
->local
->mtx
);
2310 mlme_dbg_ratelimited(sdata
,
2311 "detected beacon loss from AP (missed %d beacons) - probing\n",
2314 ieee80211_cqm_beacon_loss_notify(&sdata
->vif
, GFP_KERNEL
);
2318 * The driver/our work has already reported this event or the
2319 * connection monitoring has kicked in and we have already sent
2320 * a probe request. Or maybe the AP died and the driver keeps
2321 * reporting until we disassociate...
2323 * In either case we have to ignore the current call to this
2324 * function (except for setting the correct probe reason bit)
2325 * because otherwise we would reset the timer every time and
2326 * never check whether we received a probe response!
2328 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
2331 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2333 mutex_unlock(&sdata
->local
->mtx
);
2338 mutex_lock(&sdata
->local
->iflist_mtx
);
2339 ieee80211_recalc_ps(sdata
->local
);
2340 mutex_unlock(&sdata
->local
->iflist_mtx
);
2342 ifmgd
->probe_send_count
= 0;
2343 ieee80211_mgd_probe_ap_send(sdata
);
2345 sdata_unlock(sdata
);
2348 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2349 struct ieee80211_vif
*vif
)
2351 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2352 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2353 struct cfg80211_bss
*cbss
;
2354 struct sk_buff
*skb
;
2358 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2361 sdata_assert_lock(sdata
);
2363 if (ifmgd
->associated
)
2364 cbss
= ifmgd
->associated
;
2365 else if (ifmgd
->auth_data
)
2366 cbss
= ifmgd
->auth_data
->bss
;
2367 else if (ifmgd
->assoc_data
)
2368 cbss
= ifmgd
->assoc_data
->bss
;
2373 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2374 if (WARN_ON_ONCE(ssid
== NULL
))
2379 skb
= ieee80211_build_probe_req(sdata
, sdata
->vif
.addr
, cbss
->bssid
,
2380 (u32
) -1, cbss
->channel
,
2387 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2389 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data
*sdata
,
2390 const u8
*buf
, size_t len
, bool tx
,
2393 struct ieee80211_event event
= {
2395 .u
.mlme
.data
= tx
? DEAUTH_TX_EVENT
: DEAUTH_RX_EVENT
,
2396 .u
.mlme
.reason
= reason
,
2400 cfg80211_tx_mlme_mgmt(sdata
->dev
, buf
, len
);
2402 cfg80211_rx_mlme_mgmt(sdata
->dev
, buf
, len
);
2404 drv_event_callback(sdata
->local
, sdata
, &event
);
2407 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2409 struct ieee80211_local
*local
= sdata
->local
;
2410 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2411 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2414 if (!ifmgd
->associated
) {
2415 sdata_unlock(sdata
);
2419 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2420 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2422 mutex_lock(&local
->mtx
);
2423 sdata
->vif
.csa_active
= false;
2424 ifmgd
->csa_waiting_bcn
= false;
2425 if (sdata
->csa_block_tx
) {
2426 ieee80211_wake_vif_queues(local
, sdata
,
2427 IEEE80211_QUEUE_STOP_REASON_CSA
);
2428 sdata
->csa_block_tx
= false;
2430 mutex_unlock(&local
->mtx
);
2432 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
2433 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2435 sdata_unlock(sdata
);
2438 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2440 struct ieee80211_sub_if_data
*sdata
=
2441 container_of(work
, struct ieee80211_sub_if_data
,
2442 u
.mgd
.beacon_connection_loss_work
);
2443 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2445 if (ifmgd
->associated
)
2446 ifmgd
->beacon_loss_count
++;
2448 if (ifmgd
->connection_loss
) {
2449 sdata_info(sdata
, "Connection to AP %pM lost\n",
2451 __ieee80211_disconnect(sdata
);
2453 ieee80211_mgd_probe_ap(sdata
, true);
2457 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2459 struct ieee80211_sub_if_data
*sdata
=
2460 container_of(work
, struct ieee80211_sub_if_data
,
2461 u
.mgd
.csa_connection_drop_work
);
2463 __ieee80211_disconnect(sdata
);
2466 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2468 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2469 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2471 trace_api_beacon_loss(sdata
);
2473 sdata
->u
.mgd
.connection_loss
= false;
2474 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2476 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2478 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2480 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2481 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2483 trace_api_connection_loss(sdata
);
2485 sdata
->u
.mgd
.connection_loss
= true;
2486 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2488 EXPORT_SYMBOL(ieee80211_connection_loss
);
2491 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2494 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2496 sdata_assert_lock(sdata
);
2500 * we are not authenticated yet, the only timer that could be
2501 * running is the timeout for the authentication response which
2502 * which is not relevant anymore.
2504 del_timer_sync(&sdata
->u
.mgd
.timer
);
2505 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2507 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2508 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2509 sdata
->u
.mgd
.flags
= 0;
2510 mutex_lock(&sdata
->local
->mtx
);
2511 ieee80211_vif_release_channel(sdata
);
2512 mutex_unlock(&sdata
->local
->mtx
);
2515 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2517 sdata
->u
.mgd
.auth_data
= NULL
;
2520 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2523 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2525 sdata_assert_lock(sdata
);
2529 * we are not associated yet, the only timer that could be
2530 * running is the timeout for the association response which
2531 * which is not relevant anymore.
2533 del_timer_sync(&sdata
->u
.mgd
.timer
);
2534 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2536 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2537 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2538 sdata
->u
.mgd
.flags
= 0;
2539 sdata
->flags
&= ~IEEE80211_SDATA_MU_MIMO_OWNER
;
2540 mutex_lock(&sdata
->local
->mtx
);
2541 ieee80211_vif_release_channel(sdata
);
2542 mutex_unlock(&sdata
->local
->mtx
);
2546 sdata
->u
.mgd
.assoc_data
= NULL
;
2549 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2550 struct ieee80211_mgmt
*mgmt
, size_t len
)
2552 struct ieee80211_local
*local
= sdata
->local
;
2553 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2555 struct ieee802_11_elems elems
;
2558 pos
= mgmt
->u
.auth
.variable
;
2559 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2560 if (!elems
.challenge
)
2562 auth_data
->expected_transaction
= 4;
2563 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2564 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
2565 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2566 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2567 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2568 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2569 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2570 auth_data
->key
, auth_data
->key_len
,
2571 auth_data
->key_idx
, tx_flags
);
2574 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2575 struct ieee80211_mgmt
*mgmt
, size_t len
)
2577 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2579 u16 auth_alg
, auth_transaction
, status_code
;
2580 struct sta_info
*sta
;
2581 struct ieee80211_event event
= {
2583 .u
.mlme
.data
= AUTH_EVENT
,
2586 sdata_assert_lock(sdata
);
2591 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2594 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2596 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2599 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2600 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2601 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2603 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2604 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2605 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2606 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2608 ifmgd
->auth_data
->expected_transaction
);
2612 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2613 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2614 mgmt
->sa
, status_code
);
2615 ieee80211_destroy_auth_data(sdata
, false);
2616 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2617 event
.u
.mlme
.status
= MLME_DENIED
;
2618 event
.u
.mlme
.reason
= status_code
;
2619 drv_event_callback(sdata
->local
, sdata
, &event
);
2623 switch (ifmgd
->auth_data
->algorithm
) {
2624 case WLAN_AUTH_OPEN
:
2625 case WLAN_AUTH_LEAP
:
2629 case WLAN_AUTH_SHARED_KEY
:
2630 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2631 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2632 /* need another frame */
2637 WARN_ONCE(1, "invalid auth alg %d",
2638 ifmgd
->auth_data
->algorithm
);
2642 event
.u
.mlme
.status
= MLME_SUCCESS
;
2643 drv_event_callback(sdata
->local
, sdata
, &event
);
2644 sdata_info(sdata
, "authenticated\n");
2645 ifmgd
->auth_data
->done
= true;
2646 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2647 ifmgd
->auth_data
->timeout_started
= true;
2648 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2650 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2651 ifmgd
->auth_data
->expected_transaction
!= 2) {
2653 * Report auth frame to user space for processing since another
2654 * round of Authentication frames is still needed.
2656 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2660 /* move station state to auth */
2661 mutex_lock(&sdata
->local
->sta_mtx
);
2662 sta
= sta_info_get(sdata
, bssid
);
2664 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2667 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2668 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2671 mutex_unlock(&sdata
->local
->sta_mtx
);
2673 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2676 mutex_unlock(&sdata
->local
->sta_mtx
);
2677 /* ignore frame -- wait for timeout */
2680 #define case_WLAN(type) \
2681 case WLAN_REASON_##type: return #type
2683 static const char *ieee80211_get_reason_code_string(u16 reason_code
)
2685 switch (reason_code
) {
2686 case_WLAN(UNSPECIFIED
);
2687 case_WLAN(PREV_AUTH_NOT_VALID
);
2688 case_WLAN(DEAUTH_LEAVING
);
2689 case_WLAN(DISASSOC_DUE_TO_INACTIVITY
);
2690 case_WLAN(DISASSOC_AP_BUSY
);
2691 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA
);
2692 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA
);
2693 case_WLAN(DISASSOC_STA_HAS_LEFT
);
2694 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH
);
2695 case_WLAN(DISASSOC_BAD_POWER
);
2696 case_WLAN(DISASSOC_BAD_SUPP_CHAN
);
2697 case_WLAN(INVALID_IE
);
2698 case_WLAN(MIC_FAILURE
);
2699 case_WLAN(4WAY_HANDSHAKE_TIMEOUT
);
2700 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT
);
2701 case_WLAN(IE_DIFFERENT
);
2702 case_WLAN(INVALID_GROUP_CIPHER
);
2703 case_WLAN(INVALID_PAIRWISE_CIPHER
);
2704 case_WLAN(INVALID_AKMP
);
2705 case_WLAN(UNSUPP_RSN_VERSION
);
2706 case_WLAN(INVALID_RSN_IE_CAP
);
2707 case_WLAN(IEEE8021X_FAILED
);
2708 case_WLAN(CIPHER_SUITE_REJECTED
);
2709 case_WLAN(DISASSOC_UNSPECIFIED_QOS
);
2710 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH
);
2711 case_WLAN(DISASSOC_LOW_ACK
);
2712 case_WLAN(DISASSOC_QAP_EXCEED_TXOP
);
2713 case_WLAN(QSTA_LEAVE_QBSS
);
2714 case_WLAN(QSTA_NOT_USE
);
2715 case_WLAN(QSTA_REQUIRE_SETUP
);
2716 case_WLAN(QSTA_TIMEOUT
);
2717 case_WLAN(QSTA_CIPHER_NOT_SUPP
);
2718 case_WLAN(MESH_PEER_CANCELED
);
2719 case_WLAN(MESH_MAX_PEERS
);
2720 case_WLAN(MESH_CONFIG
);
2721 case_WLAN(MESH_CLOSE
);
2722 case_WLAN(MESH_MAX_RETRIES
);
2723 case_WLAN(MESH_CONFIRM_TIMEOUT
);
2724 case_WLAN(MESH_INVALID_GTK
);
2725 case_WLAN(MESH_INCONSISTENT_PARAM
);
2726 case_WLAN(MESH_INVALID_SECURITY
);
2727 case_WLAN(MESH_PATH_ERROR
);
2728 case_WLAN(MESH_PATH_NOFORWARD
);
2729 case_WLAN(MESH_PATH_DEST_UNREACHABLE
);
2730 case_WLAN(MAC_EXISTS_IN_MBSS
);
2731 case_WLAN(MESH_CHAN_REGULATORY
);
2732 case_WLAN(MESH_CHAN
);
2733 default: return "<unknown>";
2737 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2738 struct ieee80211_mgmt
*mgmt
, size_t len
)
2740 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2741 u16 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2743 sdata_assert_lock(sdata
);
2748 if (ifmgd
->associated
&&
2749 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
)) {
2750 const u8
*bssid
= ifmgd
->associated
->bssid
;
2752 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u=%s)\n",
2754 ieee80211_get_reason_code_string(reason_code
));
2756 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2758 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false,
2763 if (ifmgd
->assoc_data
&&
2764 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2765 const u8
*bssid
= ifmgd
->assoc_data
->bss
->bssid
;
2768 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2770 ieee80211_get_reason_code_string(reason_code
));
2772 ieee80211_destroy_assoc_data(sdata
, false);
2774 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2780 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2781 struct ieee80211_mgmt
*mgmt
, size_t len
)
2783 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2786 sdata_assert_lock(sdata
);
2791 if (!ifmgd
->associated
||
2792 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2795 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2797 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2798 mgmt
->sa
, reason_code
);
2800 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2802 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false, reason_code
);
2805 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2806 u8
*supp_rates
, unsigned int supp_rates_len
,
2807 u32
*rates
, u32
*basic_rates
,
2808 bool *have_higher_than_11mbit
,
2809 int *min_rate
, int *min_rate_index
,
2810 int shift
, u32 rate_flags
)
2814 for (i
= 0; i
< supp_rates_len
; i
++) {
2815 int rate
= supp_rates
[i
] & 0x7f;
2816 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2818 if ((rate
* 5 * (1 << shift
)) > 110)
2819 *have_higher_than_11mbit
= true;
2822 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2823 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2825 * Note: Even through the membership selector and the basic
2826 * rate flag share the same bit, they are not exactly
2829 if (!!(supp_rates
[i
] & 0x80) &&
2830 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2833 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2834 struct ieee80211_rate
*br
;
2837 br
= &sband
->bitrates
[j
];
2838 if ((rate_flags
& br
->flags
) != rate_flags
)
2841 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2842 if (brate
== rate
) {
2845 *basic_rates
|= BIT(j
);
2846 if ((rate
* 5) < *min_rate
) {
2847 *min_rate
= rate
* 5;
2848 *min_rate_index
= j
;
2856 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2857 struct cfg80211_bss
*cbss
,
2858 struct ieee80211_mgmt
*mgmt
, size_t len
)
2860 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2861 struct ieee80211_local
*local
= sdata
->local
;
2862 struct ieee80211_supported_band
*sband
;
2863 struct sta_info
*sta
;
2865 u16 capab_info
, aid
;
2866 struct ieee802_11_elems elems
;
2867 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2868 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2869 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2874 /* AssocResp and ReassocResp have identical structure */
2876 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2877 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2879 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2880 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2882 aid
&= ~(BIT(15) | BIT(14));
2884 ifmgd
->broken_ap
= false;
2886 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2887 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2890 ifmgd
->broken_ap
= true;
2893 pos
= mgmt
->u
.assoc_resp
.variable
;
2894 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2896 if (!elems
.supp_rates
) {
2897 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2902 ifmgd
->tdls_chan_switch_prohibited
=
2903 elems
.ext_capab
&& elems
.ext_capab_len
>= 5 &&
2904 (elems
.ext_capab
[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED
);
2907 * Some APs are erroneously not including some information in their
2908 * (re)association response frames. Try to recover by using the data
2909 * from the beacon or probe response. This seems to afflict mobile
2910 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2911 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2913 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2914 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2915 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2916 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2917 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2918 const struct cfg80211_bss_ies
*ies
;
2919 struct ieee802_11_elems bss_elems
;
2922 ies
= rcu_dereference(cbss
->ies
);
2924 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2930 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2932 if (assoc_data
->wmm
&&
2933 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2934 elems
.wmm_param
= bss_elems
.wmm_param
;
2936 "AP bug: WMM param missing from AssocResp\n");
2940 * Also check if we requested HT/VHT, otherwise the AP doesn't
2941 * have to include the IEs in the (re)association response.
2943 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2944 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2945 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2947 "AP bug: HT capability missing from AssocResp\n");
2949 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2950 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2951 elems
.ht_operation
= bss_elems
.ht_operation
;
2953 "AP bug: HT operation missing from AssocResp\n");
2955 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2956 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2957 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2959 "AP bug: VHT capa missing from AssocResp\n");
2961 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2962 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2963 elems
.vht_operation
= bss_elems
.vht_operation
;
2965 "AP bug: VHT operation missing from AssocResp\n");
2970 * We previously checked these in the beacon/probe response, so
2971 * they should be present here. This is just a safety net.
2973 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2974 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2976 "HT AP is missing WMM params or HT capability/operation\n");
2981 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2982 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2984 "VHT AP is missing VHT capability/operation\n");
2989 mutex_lock(&sdata
->local
->sta_mtx
);
2991 * station info was already allocated and inserted before
2992 * the association and should be available to us
2994 sta
= sta_info_get(sdata
, cbss
->bssid
);
2995 if (WARN_ON(!sta
)) {
2996 mutex_unlock(&sdata
->local
->sta_mtx
);
3001 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
3003 /* Set up internal HT/VHT capabilities */
3004 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
3005 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
3006 elems
.ht_cap_elem
, sta
);
3008 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
3009 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
3010 elems
.vht_cap_elem
, sta
);
3013 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3014 * in their association response, so ignore that data for our own
3015 * configuration. If it changed since the last beacon, we'll get the
3016 * next beacon and update then.
3020 * If an operating mode notification IE is present, override the
3021 * NSS calculation (that would be done in rate_control_rate_init())
3022 * and use the # of streams from that element.
3024 if (elems
.opmode_notif
&&
3025 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
3028 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
3029 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
3031 sta
->sta
.rx_nss
= nss
;
3034 rate_control_rate_init(sta
);
3036 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
) {
3037 set_sta_flag(sta
, WLAN_STA_MFP
);
3038 sta
->sta
.mfp
= true;
3040 sta
->sta
.mfp
= false;
3043 sta
->sta
.wme
= elems
.wmm_param
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
;
3045 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
3046 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
3047 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
3050 "failed to move station %pM to desired state\n",
3052 WARN_ON(__sta_info_destroy(sta
));
3053 mutex_unlock(&sdata
->local
->sta_mtx
);
3058 mutex_unlock(&sdata
->local
->sta_mtx
);
3061 * Always handle WMM once after association regardless
3062 * of the first value the AP uses. Setting -1 here has
3063 * that effect because the AP values is an unsigned
3066 ifmgd
->wmm_last_param_set
= -1;
3068 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
3069 ieee80211_set_wmm_default(sdata
, false, false);
3070 } else if (!ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3071 elems
.wmm_param_len
)) {
3072 /* still enable QoS since we might have HT/VHT */
3073 ieee80211_set_wmm_default(sdata
, false, true);
3074 /* set the disable-WMM flag in this case to disable
3075 * tracking WMM parameter changes in the beacon if
3076 * the parameters weren't actually valid. Doing so
3077 * avoids changing parameters very strangely when
3078 * the AP is going back and forth between valid and
3079 * invalid parameters.
3081 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
3083 changed
|= BSS_CHANGED_QOS
;
3085 /* set AID and assoc capability,
3086 * ieee80211_set_associated() will tell the driver */
3087 bss_conf
->aid
= aid
;
3088 bss_conf
->assoc_capability
= capab_info
;
3089 ieee80211_set_associated(sdata
, cbss
, changed
);
3092 * If we're using 4-addr mode, let the AP know that we're
3093 * doing so, so that it can create the STA VLAN on its side
3095 if (ifmgd
->use_4addr
)
3096 ieee80211_send_4addr_nullfunc(local
, sdata
);
3099 * Start timer to probe the connection to the AP now.
3100 * Also start the timer that will detect beacon loss.
3102 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
3103 ieee80211_sta_reset_beacon_monitor(sdata
);
3111 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
3112 struct ieee80211_mgmt
*mgmt
,
3115 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3116 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
3117 u16 capab_info
, status_code
, aid
;
3118 struct ieee802_11_elems elems
;
3119 int ac
, uapsd_queues
= -1;
3122 struct cfg80211_bss
*bss
;
3123 struct ieee80211_event event
= {
3125 .u
.mlme
.data
= ASSOC_EVENT
,
3128 sdata_assert_lock(sdata
);
3132 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
3136 * AssocResp and ReassocResp have identical structure, so process both
3137 * of them in this function.
3143 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
3144 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
3145 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
3146 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
3149 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3150 reassoc
? "Rea" : "A", mgmt
->sa
,
3151 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
3153 pos
= mgmt
->u
.assoc_resp
.variable
;
3154 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
3156 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
3157 elems
.timeout_int
&&
3158 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
3160 tu
= le32_to_cpu(elems
.timeout_int
->value
);
3161 ms
= tu
* 1024 / 1000;
3163 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3165 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
3166 assoc_data
->timeout_started
= true;
3167 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
3168 run_again(sdata
, assoc_data
->timeout
);
3172 bss
= assoc_data
->bss
;
3174 if (status_code
!= WLAN_STATUS_SUCCESS
) {
3175 sdata_info(sdata
, "%pM denied association (code=%d)\n",
3176 mgmt
->sa
, status_code
);
3177 ieee80211_destroy_assoc_data(sdata
, false);
3178 event
.u
.mlme
.status
= MLME_DENIED
;
3179 event
.u
.mlme
.reason
= status_code
;
3180 drv_event_callback(sdata
->local
, sdata
, &event
);
3182 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
3183 /* oops -- internal error -- send timeout for now */
3184 ieee80211_destroy_assoc_data(sdata
, false);
3185 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3188 event
.u
.mlme
.status
= MLME_SUCCESS
;
3189 drv_event_callback(sdata
->local
, sdata
, &event
);
3190 sdata_info(sdata
, "associated\n");
3193 * destroy assoc_data afterwards, as otherwise an idle
3194 * recalc after assoc_data is NULL but before associated
3195 * is set can cause the interface to go idle
3197 ieee80211_destroy_assoc_data(sdata
, true);
3199 /* get uapsd queues configuration */
3201 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
3202 if (sdata
->tx_conf
[ac
].uapsd
)
3203 uapsd_queues
|= BIT(ac
);
3206 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
, uapsd_queues
);
3209 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
3210 struct ieee80211_mgmt
*mgmt
, size_t len
,
3211 struct ieee80211_rx_status
*rx_status
,
3212 struct ieee802_11_elems
*elems
)
3214 struct ieee80211_local
*local
= sdata
->local
;
3215 struct ieee80211_bss
*bss
;
3216 struct ieee80211_channel
*channel
;
3218 sdata_assert_lock(sdata
);
3220 channel
= ieee80211_get_channel(local
->hw
.wiphy
, rx_status
->freq
);
3224 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
3227 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
3228 ieee80211_rx_bss_put(local
, bss
);
3233 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
3234 struct sk_buff
*skb
)
3236 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
3237 struct ieee80211_if_managed
*ifmgd
;
3238 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
3239 size_t baselen
, len
= skb
->len
;
3240 struct ieee802_11_elems elems
;
3242 ifmgd
= &sdata
->u
.mgd
;
3244 sdata_assert_lock(sdata
);
3246 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
3247 return; /* ignore ProbeResp to foreign address */
3249 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
3253 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
3256 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3258 if (ifmgd
->associated
&&
3259 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3260 ieee80211_reset_ap_probe(sdata
);
3264 * This is the canonical list of information elements we care about,
3265 * the filter code also gives us all changes to the Microsoft OUI
3266 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3267 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3268 * changes to requested client power.
3270 * We implement beacon filtering in software since that means we can
3271 * avoid processing the frame here and in cfg80211, and userspace
3272 * will not be able to tell whether the hardware supports it or not.
3274 * XXX: This list needs to be dynamic -- userspace needs to be able to
3275 * add items it requires. It also needs to be able to tell us to
3276 * look out for other vendor IEs.
3278 static const u64 care_about_ies
=
3279 (1ULL << WLAN_EID_COUNTRY
) |
3280 (1ULL << WLAN_EID_ERP_INFO
) |
3281 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
3282 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
3283 (1ULL << WLAN_EID_HT_CAPABILITY
) |
3284 (1ULL << WLAN_EID_HT_OPERATION
) |
3285 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN
);
3287 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
3288 struct ieee80211_mgmt
*mgmt
, size_t len
,
3289 struct ieee80211_rx_status
*rx_status
)
3291 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3292 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
3294 struct ieee802_11_elems elems
;
3295 struct ieee80211_local
*local
= sdata
->local
;
3296 struct ieee80211_chanctx_conf
*chanctx_conf
;
3297 struct ieee80211_channel
*chan
;
3298 struct sta_info
*sta
;
3304 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3306 sdata_assert_lock(sdata
);
3308 /* Process beacon from the current BSS */
3309 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
3314 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3315 if (!chanctx_conf
) {
3320 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
3324 chan
= chanctx_conf
->def
.chan
;
3327 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
3328 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
3329 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
3330 len
- baselen
, false, &elems
);
3332 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3333 if (elems
.tim
&& !elems
.parse_error
) {
3334 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
3335 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
3337 ifmgd
->have_beacon
= true;
3338 ifmgd
->assoc_data
->need_beacon
= false;
3339 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3340 sdata
->vif
.bss_conf
.sync_tsf
=
3341 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3342 sdata
->vif
.bss_conf
.sync_device_ts
=
3343 rx_status
->device_timestamp
;
3345 sdata
->vif
.bss_conf
.sync_dtim_count
=
3346 elems
.tim
->dtim_count
;
3348 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3350 /* continue assoc process */
3351 ifmgd
->assoc_data
->timeout
= jiffies
;
3352 ifmgd
->assoc_data
->timeout_started
= true;
3353 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3357 if (!ifmgd
->associated
||
3358 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3360 bssid
= ifmgd
->associated
->bssid
;
3362 /* Track average RSSI from the Beacon frames of the current AP */
3363 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3364 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3365 ewma_beacon_signal_init(&ifmgd
->ave_beacon_signal
);
3366 ifmgd
->last_cqm_event_signal
= 0;
3367 ifmgd
->count_beacon_signal
= 1;
3368 ifmgd
->last_ave_beacon_signal
= 0;
3370 ifmgd
->count_beacon_signal
++;
3373 ewma_beacon_signal_add(&ifmgd
->ave_beacon_signal
, -rx_status
->signal
);
3375 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3376 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3377 int sig
= -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
3378 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3379 struct ieee80211_event event
= {
3384 * if signal crosses either of the boundaries, invoke callback
3385 * with appropriate parameters
3387 if (sig
> ifmgd
->rssi_max_thold
&&
3388 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3389 ifmgd
->last_ave_beacon_signal
= sig
;
3390 event
.u
.rssi
.data
= RSSI_EVENT_HIGH
;
3391 drv_event_callback(local
, sdata
, &event
);
3392 } else if (sig
< ifmgd
->rssi_min_thold
&&
3393 (last_sig
>= ifmgd
->rssi_max_thold
||
3395 ifmgd
->last_ave_beacon_signal
= sig
;
3396 event
.u
.rssi
.data
= RSSI_EVENT_LOW
;
3397 drv_event_callback(local
, sdata
, &event
);
3401 if (bss_conf
->cqm_rssi_thold
&&
3402 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3403 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3404 int sig
= -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
3405 int last_event
= ifmgd
->last_cqm_event_signal
;
3406 int thold
= bss_conf
->cqm_rssi_thold
;
3407 int hyst
= bss_conf
->cqm_rssi_hyst
;
3410 (last_event
== 0 || sig
< last_event
- hyst
)) {
3411 ifmgd
->last_cqm_event_signal
= sig
;
3412 ieee80211_cqm_rssi_notify(
3414 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3416 } else if (sig
> thold
&&
3417 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3418 ifmgd
->last_cqm_event_signal
= sig
;
3419 ieee80211_cqm_rssi_notify(
3421 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3426 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
3427 mlme_dbg_ratelimited(sdata
,
3428 "cancelling AP probe due to a received beacon\n");
3429 ieee80211_reset_ap_probe(sdata
);
3433 * Push the beacon loss detection into the future since
3434 * we are processing a beacon from the AP just now.
3436 ieee80211_sta_reset_beacon_monitor(sdata
);
3438 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3439 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3440 len
- baselen
, false, &elems
,
3441 care_about_ies
, ncrc
);
3443 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
3444 ieee80211_check_tim(elems
.tim
, elems
.tim_len
, ifmgd
->aid
)) {
3445 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3446 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3447 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3448 ieee80211_hw_config(local
,
3449 IEEE80211_CONF_CHANGE_PS
);
3451 ieee80211_send_nullfunc(local
, sdata
, false);
3452 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3453 local
->pspolling
= true;
3456 * Here is assumed that the driver will be
3457 * able to send ps-poll frame and receive a
3458 * response even though power save mode is
3459 * enabled, but some drivers might require
3460 * to disable power save here. This needs
3461 * to be investigated.
3463 ieee80211_send_pspoll(local
, sdata
);
3467 if (sdata
->vif
.p2p
||
3468 sdata
->vif
.driver_flags
& IEEE80211_VIF_GET_NOA_UPDATE
) {
3469 struct ieee80211_p2p_noa_attr noa
= {};
3472 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3474 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3475 (u8
*) &noa
, sizeof(noa
));
3477 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3478 /* valid noa_attr and index changed */
3479 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3480 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3481 changed
|= BSS_CHANGED_P2P_PS
;
3483 * make sure we update all information, the CRC
3484 * mechanism doesn't look at P2P attributes.
3486 ifmgd
->beacon_crc_valid
= false;
3488 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3489 /* noa_attr not found and we had valid noa_attr before */
3490 sdata
->u
.mgd
.p2p_noa_index
= -1;
3491 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3492 changed
|= BSS_CHANGED_P2P_PS
;
3493 ifmgd
->beacon_crc_valid
= false;
3497 if (ifmgd
->csa_waiting_bcn
)
3498 ieee80211_chswitch_post_beacon(sdata
);
3501 * Update beacon timing and dtim count on every beacon appearance. This
3502 * will allow the driver to use the most updated values. Do it before
3503 * comparing this one with last received beacon.
3504 * IMPORTANT: These parameters would possibly be out of sync by the time
3505 * the driver will use them. The synchronized view is currently
3506 * guaranteed only in certain callbacks.
3508 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3509 sdata
->vif
.bss_conf
.sync_tsf
=
3510 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3511 sdata
->vif
.bss_conf
.sync_device_ts
=
3512 rx_status
->device_timestamp
;
3514 sdata
->vif
.bss_conf
.sync_dtim_count
=
3515 elems
.tim
->dtim_count
;
3517 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3520 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3522 ifmgd
->beacon_crc
= ncrc
;
3523 ifmgd
->beacon_crc_valid
= true;
3525 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3527 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
3528 rx_status
->device_timestamp
,
3531 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
3532 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3533 elems
.wmm_param_len
))
3534 changed
|= BSS_CHANGED_QOS
;
3537 * If we haven't had a beacon before, tell the driver about the
3538 * DTIM period (and beacon timing if desired) now.
3540 if (!ifmgd
->have_beacon
) {
3541 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3543 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3545 bss_conf
->dtim_period
= 1;
3547 changed
|= BSS_CHANGED_BEACON_INFO
;
3548 ifmgd
->have_beacon
= true;
3550 mutex_lock(&local
->iflist_mtx
);
3551 ieee80211_recalc_ps(local
);
3552 mutex_unlock(&local
->iflist_mtx
);
3554 ieee80211_recalc_ps_vif(sdata
);
3557 if (elems
.erp_info
) {
3559 erp_value
= elems
.erp_info
[0];
3563 changed
|= ieee80211_handle_bss_capability(sdata
,
3564 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3565 erp_valid
, erp_value
);
3567 mutex_lock(&local
->sta_mtx
);
3568 sta
= sta_info_get(sdata
, bssid
);
3570 if (ieee80211_config_bw(sdata
, sta
,
3571 elems
.ht_cap_elem
, elems
.ht_operation
,
3572 elems
.vht_operation
, bssid
, &changed
)) {
3573 mutex_unlock(&local
->sta_mtx
);
3574 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3575 WLAN_REASON_DEAUTH_LEAVING
,
3577 ieee80211_report_disconnect(sdata
, deauth_buf
,
3578 sizeof(deauth_buf
), true,
3579 WLAN_REASON_DEAUTH_LEAVING
);
3583 if (sta
&& elems
.opmode_notif
)
3584 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3586 mutex_unlock(&local
->sta_mtx
);
3588 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
, mgmt
,
3590 elems
.country_elem_len
,
3591 elems
.pwr_constr_elem
,
3592 elems
.cisco_dtpc_elem
);
3594 ieee80211_bss_info_change_notify(sdata
, changed
);
3597 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3598 struct sk_buff
*skb
)
3600 struct ieee80211_rx_status
*rx_status
;
3601 struct ieee80211_mgmt
*mgmt
;
3603 struct ieee802_11_elems elems
;
3606 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3607 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3608 fc
= le16_to_cpu(mgmt
->frame_control
);
3612 switch (fc
& IEEE80211_FCTL_STYPE
) {
3613 case IEEE80211_STYPE_BEACON
:
3614 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3616 case IEEE80211_STYPE_PROBE_RESP
:
3617 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3619 case IEEE80211_STYPE_AUTH
:
3620 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3622 case IEEE80211_STYPE_DEAUTH
:
3623 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3625 case IEEE80211_STYPE_DISASSOC
:
3626 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3628 case IEEE80211_STYPE_ASSOC_RESP
:
3629 case IEEE80211_STYPE_REASSOC_RESP
:
3630 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3632 case IEEE80211_STYPE_ACTION
:
3633 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3634 ies_len
= skb
->len
-
3635 offsetof(struct ieee80211_mgmt
,
3636 u
.action
.u
.chan_switch
.variable
);
3641 ieee802_11_parse_elems(
3642 mgmt
->u
.action
.u
.chan_switch
.variable
,
3643 ies_len
, true, &elems
);
3645 if (elems
.parse_error
)
3648 ieee80211_sta_process_chanswitch(sdata
,
3650 rx_status
->device_timestamp
,
3652 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3653 ies_len
= skb
->len
-
3654 offsetof(struct ieee80211_mgmt
,
3655 u
.action
.u
.ext_chan_switch
.variable
);
3660 ieee802_11_parse_elems(
3661 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3662 ies_len
, true, &elems
);
3664 if (elems
.parse_error
)
3667 /* for the handling code pretend this was also an IE */
3668 elems
.ext_chansw_ie
=
3669 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3671 ieee80211_sta_process_chanswitch(sdata
,
3673 rx_status
->device_timestamp
,
3678 sdata_unlock(sdata
);
3681 static void ieee80211_sta_timer(unsigned long data
)
3683 struct ieee80211_sub_if_data
*sdata
=
3684 (struct ieee80211_sub_if_data
*) data
;
3686 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3689 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3690 u8
*bssid
, u8 reason
, bool tx
)
3692 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3694 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3697 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
3701 static int ieee80211_auth(struct ieee80211_sub_if_data
*sdata
)
3703 struct ieee80211_local
*local
= sdata
->local
;
3704 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3705 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3710 sdata_assert_lock(sdata
);
3712 if (WARN_ON_ONCE(!auth_data
))
3717 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3718 sdata_info(sdata
, "authentication with %pM timed out\n",
3719 auth_data
->bss
->bssid
);
3722 * Most likely AP is not in the range so remove the
3723 * bss struct for that AP.
3725 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3730 drv_mgd_prepare_tx(local
, sdata
);
3732 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3733 auth_data
->bss
->bssid
, auth_data
->tries
,
3734 IEEE80211_AUTH_MAX_TRIES
);
3736 auth_data
->expected_transaction
= 2;
3738 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3739 trans
= auth_data
->sae_trans
;
3740 status
= auth_data
->sae_status
;
3741 auth_data
->expected_transaction
= trans
;
3744 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3745 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3746 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3748 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3749 auth_data
->data
, auth_data
->data_len
,
3750 auth_data
->bss
->bssid
,
3751 auth_data
->bss
->bssid
, NULL
, 0, 0,
3754 if (tx_flags
== 0) {
3755 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3756 auth_data
->timeout_started
= true;
3757 run_again(sdata
, auth_data
->timeout
);
3759 auth_data
->timeout
=
3760 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3761 auth_data
->timeout_started
= true;
3762 run_again(sdata
, auth_data
->timeout
);
3768 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3770 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3771 struct ieee80211_local
*local
= sdata
->local
;
3773 sdata_assert_lock(sdata
);
3775 assoc_data
->tries
++;
3776 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3777 sdata_info(sdata
, "association with %pM timed out\n",
3778 assoc_data
->bss
->bssid
);
3781 * Most likely AP is not in the range so remove the
3782 * bss struct for that AP.
3784 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3789 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3790 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3791 IEEE80211_ASSOC_MAX_TRIES
);
3792 ieee80211_send_assoc(sdata
);
3794 if (!ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3795 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3796 assoc_data
->timeout_started
= true;
3797 run_again(sdata
, assoc_data
->timeout
);
3799 assoc_data
->timeout
=
3800 round_jiffies_up(jiffies
+
3801 IEEE80211_ASSOC_TIMEOUT_LONG
);
3802 assoc_data
->timeout_started
= true;
3803 run_again(sdata
, assoc_data
->timeout
);
3809 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3810 __le16 fc
, bool acked
)
3812 struct ieee80211_local
*local
= sdata
->local
;
3814 sdata
->u
.mgd
.status_fc
= fc
;
3815 sdata
->u
.mgd
.status_acked
= acked
;
3816 sdata
->u
.mgd
.status_received
= true;
3818 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3821 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3823 struct ieee80211_local
*local
= sdata
->local
;
3824 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3828 if (ifmgd
->status_received
) {
3829 __le16 fc
= ifmgd
->status_fc
;
3830 bool status_acked
= ifmgd
->status_acked
;
3832 ifmgd
->status_received
= false;
3833 if (ifmgd
->auth_data
&& ieee80211_is_auth(fc
)) {
3835 ifmgd
->auth_data
->timeout
=
3836 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3837 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3839 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3841 ifmgd
->auth_data
->timeout_started
= true;
3842 } else if (ifmgd
->assoc_data
&&
3843 (ieee80211_is_assoc_req(fc
) ||
3844 ieee80211_is_reassoc_req(fc
))) {
3846 ifmgd
->assoc_data
->timeout
=
3847 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3848 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3850 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3852 ifmgd
->assoc_data
->timeout_started
= true;
3856 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3857 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3858 if (ifmgd
->auth_data
->done
) {
3860 * ok ... we waited for assoc but userspace didn't,
3861 * so let's just kill the auth data
3863 ieee80211_destroy_auth_data(sdata
, false);
3864 } else if (ieee80211_auth(sdata
)) {
3866 struct ieee80211_event event
= {
3868 .u
.mlme
.data
= AUTH_EVENT
,
3869 .u
.mlme
.status
= MLME_TIMEOUT
,
3872 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3874 ieee80211_destroy_auth_data(sdata
, false);
3876 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3877 drv_event_callback(sdata
->local
, sdata
, &event
);
3879 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3880 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3882 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3883 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3884 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3885 ieee80211_do_assoc(sdata
)) {
3886 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3887 struct ieee80211_event event
= {
3889 .u
.mlme
.data
= ASSOC_EVENT
,
3890 .u
.mlme
.status
= MLME_TIMEOUT
,
3893 ieee80211_destroy_assoc_data(sdata
, false);
3894 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3895 drv_event_callback(sdata
->local
, sdata
, &event
);
3897 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3898 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3900 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3901 ifmgd
->associated
) {
3905 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3907 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3908 max_tries
= max_nullfunc_tries
;
3910 max_tries
= max_probe_tries
;
3912 /* ACK received for nullfunc probing frame */
3913 if (!ifmgd
->probe_send_count
)
3914 ieee80211_reset_ap_probe(sdata
);
3915 else if (ifmgd
->nullfunc_failed
) {
3916 if (ifmgd
->probe_send_count
< max_tries
) {
3918 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3919 bssid
, ifmgd
->probe_send_count
,
3921 ieee80211_mgd_probe_ap_send(sdata
);
3924 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3926 ieee80211_sta_connection_lost(sdata
, bssid
,
3927 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3930 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3931 run_again(sdata
, ifmgd
->probe_timeout
);
3932 else if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3934 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3935 bssid
, probe_wait_ms
);
3936 ieee80211_sta_connection_lost(sdata
, bssid
,
3937 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3938 } else if (ifmgd
->probe_send_count
< max_tries
) {
3940 "No probe response from AP %pM after %dms, try %d/%i\n",
3941 bssid
, probe_wait_ms
,
3942 ifmgd
->probe_send_count
, max_tries
);
3943 ieee80211_mgd_probe_ap_send(sdata
);
3946 * We actually lost the connection ... or did we?
3949 wiphy_debug(local
->hw
.wiphy
,
3950 "%s: No probe response from AP %pM"
3951 " after %dms, disconnecting.\n",
3953 bssid
, probe_wait_ms
);
3955 ieee80211_sta_connection_lost(sdata
, bssid
,
3956 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3960 sdata_unlock(sdata
);
3963 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3965 struct ieee80211_sub_if_data
*sdata
=
3966 (struct ieee80211_sub_if_data
*) data
;
3967 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3969 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3972 sdata
->u
.mgd
.connection_loss
= false;
3973 ieee80211_queue_work(&sdata
->local
->hw
,
3974 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3977 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3979 struct ieee80211_sub_if_data
*sdata
=
3980 (struct ieee80211_sub_if_data
*) data
;
3981 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3982 struct ieee80211_local
*local
= sdata
->local
;
3984 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3987 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3990 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3992 struct ieee80211_sub_if_data
*sdata
=
3993 container_of(work
, struct ieee80211_sub_if_data
,
3994 u
.mgd
.monitor_work
);
3996 ieee80211_mgd_probe_ap(sdata
, false);
3999 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
4001 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
4002 __ieee80211_stop_poll(sdata
);
4004 /* let's probe the connection once */
4005 if (!ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
4006 ieee80211_queue_work(&sdata
->local
->hw
,
4007 &sdata
->u
.mgd
.monitor_work
);
4008 /* and do all the other regular work too */
4009 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
4014 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data
*sdata
)
4016 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4017 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4021 if (ifmgd
->auth_data
|| ifmgd
->assoc_data
) {
4022 const u8
*bssid
= ifmgd
->auth_data
?
4023 ifmgd
->auth_data
->bss
->bssid
:
4024 ifmgd
->assoc_data
->bss
->bssid
;
4027 * If we are trying to authenticate / associate while suspending,
4028 * cfg80211 won't know and won't actually abort those attempts,
4029 * thus we need to do that ourselves.
4031 ieee80211_send_deauth_disassoc(sdata
, bssid
,
4032 IEEE80211_STYPE_DEAUTH
,
4033 WLAN_REASON_DEAUTH_LEAVING
,
4035 if (ifmgd
->assoc_data
)
4036 ieee80211_destroy_assoc_data(sdata
, false);
4037 if (ifmgd
->auth_data
)
4038 ieee80211_destroy_auth_data(sdata
, false);
4039 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4040 IEEE80211_DEAUTH_FRAME_LEN
);
4043 /* This is a bit of a hack - we should find a better and more generic
4044 * solution to this. Normally when suspending, cfg80211 will in fact
4045 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4046 * auth (not so important) or assoc (this is the problem) process.
4048 * As a consequence, it can happen that we are in the process of both
4049 * associating and suspending, and receive an association response
4050 * after cfg80211 has checked if it needs to disconnect, but before
4051 * we actually set the flag to drop incoming frames. This will then
4052 * cause the workqueue flush to process the association response in
4053 * the suspend, resulting in a successful association just before it
4054 * tries to remove the interface from the driver, which now though
4055 * has a channel context assigned ... this results in issues.
4057 * To work around this (for now) simply deauth here again if we're
4060 if (ifmgd
->associated
&& !sdata
->local
->wowlan
) {
4062 struct cfg80211_deauth_request req
= {
4063 .reason_code
= WLAN_REASON_DEAUTH_LEAVING
,
4067 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
4068 ieee80211_mgd_deauth(sdata
, &req
);
4071 sdata_unlock(sdata
);
4074 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
4076 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4079 if (!ifmgd
->associated
) {
4080 sdata_unlock(sdata
);
4084 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
4085 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
4086 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
4087 ieee80211_sta_connection_lost(sdata
,
4088 ifmgd
->associated
->bssid
,
4089 WLAN_REASON_UNSPECIFIED
,
4091 sdata_unlock(sdata
);
4094 sdata_unlock(sdata
);
4098 /* interface setup */
4099 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
4101 struct ieee80211_if_managed
*ifmgd
;
4103 ifmgd
= &sdata
->u
.mgd
;
4104 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
4105 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
4106 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
4107 ieee80211_beacon_connection_loss_work
);
4108 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
4109 ieee80211_csa_connection_drop_work
);
4110 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
4111 INIT_DELAYED_WORK(&ifmgd
->tdls_peer_del_work
,
4112 ieee80211_tdls_peer_del_work
);
4113 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
4114 (unsigned long) sdata
);
4115 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
4116 (unsigned long) sdata
);
4117 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
4118 (unsigned long) sdata
);
4119 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
4120 (unsigned long) sdata
);
4121 INIT_DELAYED_WORK(&ifmgd
->tx_tspec_wk
,
4122 ieee80211_sta_handle_tspec_ac_params_wk
);
4125 ifmgd
->powersave
= sdata
->wdev
.ps
;
4126 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
4127 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
4128 ifmgd
->p2p_noa_index
= -1;
4130 if (sdata
->local
->hw
.wiphy
->features
& NL80211_FEATURE_DYNAMIC_SMPS
)
4131 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
4133 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
4135 /* Setup TDLS data */
4136 spin_lock_init(&ifmgd
->teardown_lock
);
4137 ifmgd
->teardown_skb
= NULL
;
4138 ifmgd
->orig_teardown_skb
= NULL
;
4141 /* scan finished notification */
4142 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
4144 struct ieee80211_sub_if_data
*sdata
;
4146 /* Restart STA timers */
4148 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4149 if (ieee80211_sdata_running(sdata
))
4150 ieee80211_restart_sta_timer(sdata
);
4155 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
4156 struct cfg80211_bss
*cbss
)
4158 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4159 const u8
*ht_cap_ie
, *vht_cap_ie
;
4160 const struct ieee80211_ht_cap
*ht_cap
;
4161 const struct ieee80211_vht_cap
*vht_cap
;
4164 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
4167 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4168 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
4169 ht_cap
= (void *)(ht_cap_ie
+ 2);
4170 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
4172 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4173 * "Tx Unequal Modulation Supported" fields.
4177 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
4180 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4181 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
4185 vht_cap
= (void *)(vht_cap_ie
+ 2);
4186 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
4187 for (nss
= 8; nss
> 0; nss
--) {
4188 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
4189 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
4192 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4193 chains
= max(chains
, nss
);
4199 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
4200 struct cfg80211_bss
*cbss
)
4202 struct ieee80211_local
*local
= sdata
->local
;
4203 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4204 const struct ieee80211_ht_cap
*ht_cap
= NULL
;
4205 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
4206 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
4207 struct ieee80211_supported_band
*sband
;
4208 struct cfg80211_chan_def chandef
;
4213 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4215 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
4216 IEEE80211_STA_DISABLE_80P80MHZ
|
4217 IEEE80211_STA_DISABLE_160MHZ
);
4221 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
4222 sband
->ht_cap
.ht_supported
) {
4223 const u8
*ht_oper_ie
, *ht_cap_ie
;
4225 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
4226 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
4227 ht_oper
= (void *)(ht_oper_ie
+ 2);
4229 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4230 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
))
4231 ht_cap
= (void *)(ht_cap_ie
+ 2);
4234 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4239 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4240 sband
->vht_cap
.vht_supported
) {
4241 const u8
*vht_oper_ie
, *vht_cap
;
4243 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
4244 WLAN_EID_VHT_OPERATION
);
4245 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
4246 vht_oper
= (void *)(vht_oper_ie
+ 2);
4247 if (vht_oper
&& !ht_oper
) {
4250 "AP advertised VHT without HT, disabling both\n");
4251 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4252 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4255 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4256 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
4257 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4262 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4264 for (i
= 0; i
< sband
->n_channels
; i
++) {
4265 if (sband
->channels
[i
].flags
& (IEEE80211_CHAN_DISABLED
|
4266 IEEE80211_CHAN_NO_80MHZ
))
4274 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4276 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
4278 ht_cap
, ht_oper
, vht_oper
,
4281 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
4286 /* will change later if needed */
4287 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4289 mutex_lock(&local
->mtx
);
4291 * If this fails (possibly due to channel context sharing
4292 * on incompatible channels, e.g. 80+80 and 160 sharing the
4293 * same control channel) try to use a smaller bandwidth.
4295 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4296 IEEE80211_CHANCTX_SHARED
);
4298 /* don't downgrade for 5 and 10 MHz channels, though. */
4299 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
4300 chandef
.width
== NL80211_CHAN_WIDTH_10
)
4303 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
4304 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
4305 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4306 IEEE80211_CHANCTX_SHARED
);
4309 mutex_unlock(&local
->mtx
);
4313 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
4314 struct cfg80211_bss
*cbss
, bool assoc
,
4317 struct ieee80211_local
*local
= sdata
->local
;
4318 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4319 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
4320 struct sta_info
*new_sta
= NULL
;
4321 struct ieee80211_supported_band
*sband
;
4322 bool have_sta
= false;
4325 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4327 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
4332 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
4337 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
4342 if (new_sta
|| override
) {
4343 err
= ieee80211_prep_channel(sdata
, cbss
);
4346 sta_info_free(local
, new_sta
);
4352 u32 rates
= 0, basic_rates
= 0;
4353 bool have_higher_than_11mbit
;
4354 int min_rate
= INT_MAX
, min_rate_index
= -1;
4355 struct ieee80211_chanctx_conf
*chanctx_conf
;
4356 const struct cfg80211_bss_ies
*ies
;
4357 int shift
= ieee80211_vif_get_shift(&sdata
->vif
);
4361 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4362 if (WARN_ON(!chanctx_conf
)) {
4364 sta_info_free(local
, new_sta
);
4367 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
4370 ieee80211_get_rates(sband
, bss
->supp_rates
,
4371 bss
->supp_rates_len
,
4372 &rates
, &basic_rates
,
4373 &have_higher_than_11mbit
,
4374 &min_rate
, &min_rate_index
,
4378 * This used to be a workaround for basic rates missing
4379 * in the association response frame. Now that we no
4380 * longer use the basic rates from there, it probably
4381 * doesn't happen any more, but keep the workaround so
4382 * in case some *other* APs are buggy in different ways
4383 * we can connect -- with a warning.
4385 if (!basic_rates
&& min_rate_index
>= 0) {
4387 "No basic rates, using min rate instead\n");
4388 basic_rates
= BIT(min_rate_index
);
4391 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
4392 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
4394 /* cf. IEEE 802.11 9.2.12 */
4395 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
4396 have_higher_than_11mbit
)
4397 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
4399 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
4401 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
4403 /* set timing information */
4404 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
4406 ies
= rcu_dereference(cbss
->beacon_ies
);
4410 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4411 sdata
->vif
.bss_conf
.sync_device_ts
=
4412 bss
->device_ts_beacon
;
4413 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4414 ies
->data
, ies
->len
);
4415 if (tim_ie
&& tim_ie
[1] >= 2)
4416 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
4418 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4419 } else if (!ieee80211_hw_check(&sdata
->local
->hw
,
4420 TIMING_BEACON_ONLY
)) {
4421 ies
= rcu_dereference(cbss
->proberesp_ies
);
4422 /* must be non-NULL since beacon IEs were NULL */
4423 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4424 sdata
->vif
.bss_conf
.sync_device_ts
=
4425 bss
->device_ts_presp
;
4426 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4428 sdata
->vif
.bss_conf
.sync_tsf
= 0;
4429 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
4430 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4434 /* tell driver about BSSID, basic rates and timing */
4435 ieee80211_bss_info_change_notify(sdata
,
4436 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
4437 BSS_CHANGED_BEACON_INT
);
4440 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
4442 err
= sta_info_insert(new_sta
);
4446 "failed to insert STA entry for the AP (error %d)\n",
4451 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4453 /* Cancel scan to ensure that nothing interferes with connection */
4454 if (local
->scanning
)
4455 ieee80211_scan_cancel(local
);
4461 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4462 struct cfg80211_auth_request
*req
)
4464 struct ieee80211_local
*local
= sdata
->local
;
4465 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4466 struct ieee80211_mgd_auth_data
*auth_data
;
4470 /* prepare auth data structure */
4472 switch (req
->auth_type
) {
4473 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4474 auth_alg
= WLAN_AUTH_OPEN
;
4476 case NL80211_AUTHTYPE_SHARED_KEY
:
4477 if (IS_ERR(local
->wep_tx_tfm
))
4479 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4481 case NL80211_AUTHTYPE_FT
:
4482 auth_alg
= WLAN_AUTH_FT
;
4484 case NL80211_AUTHTYPE_NETWORK_EAP
:
4485 auth_alg
= WLAN_AUTH_LEAP
;
4487 case NL80211_AUTHTYPE_SAE
:
4488 auth_alg
= WLAN_AUTH_SAE
;
4494 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4495 req
->ie_len
, GFP_KERNEL
);
4499 auth_data
->bss
= req
->bss
;
4501 if (req
->sae_data_len
>= 4) {
4502 __le16
*pos
= (__le16
*) req
->sae_data
;
4503 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4504 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4505 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4506 req
->sae_data_len
- 4);
4507 auth_data
->data_len
+= req
->sae_data_len
- 4;
4510 if (req
->ie
&& req
->ie_len
) {
4511 memcpy(&auth_data
->data
[auth_data
->data_len
],
4512 req
->ie
, req
->ie_len
);
4513 auth_data
->data_len
+= req
->ie_len
;
4516 if (req
->key
&& req
->key_len
) {
4517 auth_data
->key_len
= req
->key_len
;
4518 auth_data
->key_idx
= req
->key_idx
;
4519 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4522 auth_data
->algorithm
= auth_alg
;
4524 /* try to authenticate/probe */
4526 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4527 ifmgd
->assoc_data
) {
4532 if (ifmgd
->auth_data
)
4533 ieee80211_destroy_auth_data(sdata
, false);
4535 /* prep auth_data so we don't go into idle on disassoc */
4536 ifmgd
->auth_data
= auth_data
;
4538 if (ifmgd
->associated
) {
4539 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4541 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4542 WLAN_REASON_UNSPECIFIED
,
4545 ieee80211_report_disconnect(sdata
, frame_buf
,
4546 sizeof(frame_buf
), true,
4547 WLAN_REASON_UNSPECIFIED
);
4550 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4552 err
= ieee80211_prep_connection(sdata
, req
->bss
, false, false);
4556 err
= ieee80211_auth(sdata
);
4558 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4562 /* hold our own reference */
4563 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4567 eth_zero_addr(ifmgd
->bssid
);
4568 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4569 ifmgd
->auth_data
= NULL
;
4570 mutex_lock(&sdata
->local
->mtx
);
4571 ieee80211_vif_release_channel(sdata
);
4572 mutex_unlock(&sdata
->local
->mtx
);
4578 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4579 struct cfg80211_assoc_request
*req
)
4581 struct ieee80211_local
*local
= sdata
->local
;
4582 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4583 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4584 struct ieee80211_mgd_assoc_data
*assoc_data
;
4585 const struct cfg80211_bss_ies
*beacon_ies
;
4586 struct ieee80211_supported_band
*sband
;
4587 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4589 bool override
= false;
4591 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4596 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4602 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4603 assoc_data
->ssid_len
= ssidie
[1];
4606 if (ifmgd
->associated
) {
4607 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4609 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4610 WLAN_REASON_UNSPECIFIED
,
4613 ieee80211_report_disconnect(sdata
, frame_buf
,
4614 sizeof(frame_buf
), true,
4615 WLAN_REASON_UNSPECIFIED
);
4618 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4623 if (ifmgd
->assoc_data
) {
4628 if (ifmgd
->auth_data
) {
4631 /* keep sta info, bssid if matching */
4632 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4633 ieee80211_destroy_auth_data(sdata
, match
);
4636 /* prepare assoc data */
4638 ifmgd
->beacon_crc_valid
= false;
4640 assoc_data
->wmm
= bss
->wmm_used
&&
4641 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4644 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4645 * We still associate in non-HT mode (11a/b/g) if any one of these
4646 * ciphers is configured as pairwise.
4647 * We can set this to true for non-11n hardware, that'll be checked
4648 * separately along with the peer capabilities.
4650 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4651 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4652 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4653 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4654 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4655 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4656 netdev_info(sdata
->dev
,
4657 "disabling HT/VHT due to WEP/TKIP use\n");
4661 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4662 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4663 if (!sband
->ht_cap
.ht_supported
||
4664 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4665 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4666 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4667 if (!bss
->wmm_used
&&
4668 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4669 netdev_info(sdata
->dev
,
4670 "disabling HT as WMM/QoS is not supported by the AP\n");
4673 /* disable VHT if we don't support it or the AP doesn't use WMM */
4674 if (!sband
->vht_cap
.vht_supported
||
4675 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4676 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4677 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4678 if (!bss
->wmm_used
&&
4679 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4680 netdev_info(sdata
->dev
,
4681 "disabling VHT as WMM/QoS is not supported by the AP\n");
4684 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4685 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4686 sizeof(ifmgd
->ht_capa_mask
));
4688 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4689 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4690 sizeof(ifmgd
->vht_capa_mask
));
4692 if (req
->ie
&& req
->ie_len
) {
4693 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4694 assoc_data
->ie_len
= req
->ie_len
;
4697 assoc_data
->bss
= req
->bss
;
4699 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4700 if (ifmgd
->powersave
)
4701 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4703 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4705 sdata
->smps_mode
= ifmgd
->req_smps
;
4707 assoc_data
->capability
= req
->bss
->capability
;
4708 assoc_data
->supp_rates
= bss
->supp_rates
;
4709 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4712 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4713 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4714 assoc_data
->ap_ht_param
=
4715 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4717 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4718 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4719 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4720 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4721 sizeof(struct ieee80211_vht_cap
));
4723 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4726 if (WARN((sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
) &&
4727 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
),
4728 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4729 sdata
->vif
.driver_flags
&= ~IEEE80211_VIF_SUPPORTS_UAPSD
;
4731 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4732 (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
)) {
4733 assoc_data
->uapsd
= true;
4734 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4736 assoc_data
->uapsd
= false;
4737 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4740 if (req
->prev_bssid
)
4741 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4744 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4745 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4747 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4748 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4751 if (req
->flags
& ASSOC_REQ_USE_RRM
)
4752 ifmgd
->flags
|= IEEE80211_STA_ENABLE_RRM
;
4754 ifmgd
->flags
&= ~IEEE80211_STA_ENABLE_RRM
;
4756 if (req
->crypto
.control_port
)
4757 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4759 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4761 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4762 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4763 sdata
->encrypt_headroom
= ieee80211_cs_headroom(local
, &req
->crypto
,
4766 /* kick off associate process */
4768 ifmgd
->assoc_data
= assoc_data
;
4769 ifmgd
->dtim_period
= 0;
4770 ifmgd
->have_beacon
= false;
4772 /* override HT/VHT configuration only if the AP and we support it */
4773 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
4774 struct ieee80211_sta_ht_cap sta_ht_cap
;
4776 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
4779 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
4780 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
4782 /* check for 40 MHz disable override */
4783 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
) &&
4784 sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
4785 !(sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
4788 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4789 req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4793 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4794 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4795 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4798 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4799 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4801 err
= ieee80211_prep_connection(sdata
, req
->bss
, true, override
);
4806 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4808 if (ieee80211_hw_check(&sdata
->local
->hw
, NEED_DTIM_BEFORE_ASSOC
) &&
4811 * Wait up to one beacon interval ...
4812 * should this be more if we miss one?
4814 sdata_info(sdata
, "waiting for beacon from %pM\n",
4816 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4817 assoc_data
->timeout_started
= true;
4818 assoc_data
->need_beacon
= true;
4819 } else if (beacon_ies
) {
4820 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4825 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4826 const struct ieee80211_tim_ie
*tim
;
4827 tim
= (void *)(tim_ie
+ 2);
4828 ifmgd
->dtim_period
= tim
->dtim_period
;
4829 dtim_count
= tim
->dtim_count
;
4831 ifmgd
->have_beacon
= true;
4832 assoc_data
->timeout
= jiffies
;
4833 assoc_data
->timeout_started
= true;
4835 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
4836 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4837 sdata
->vif
.bss_conf
.sync_device_ts
=
4838 bss
->device_ts_beacon
;
4839 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4842 assoc_data
->timeout
= jiffies
;
4843 assoc_data
->timeout_started
= true;
4847 run_again(sdata
, assoc_data
->timeout
);
4849 if (bss
->corrupt_data
) {
4850 char *corrupt_type
= "data";
4851 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4852 if (bss
->corrupt_data
&
4853 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4854 corrupt_type
= "beacon and probe response";
4856 corrupt_type
= "beacon";
4857 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4858 corrupt_type
= "probe response";
4859 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4865 eth_zero_addr(ifmgd
->bssid
);
4866 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4867 ifmgd
->assoc_data
= NULL
;
4873 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4874 struct cfg80211_deauth_request
*req
)
4876 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4877 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4878 bool tx
= !req
->local_state_change
;
4880 if (ifmgd
->auth_data
&&
4881 ether_addr_equal(ifmgd
->auth_data
->bss
->bssid
, req
->bssid
)) {
4883 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4884 req
->bssid
, req
->reason_code
,
4885 ieee80211_get_reason_code_string(req
->reason_code
));
4887 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4888 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4889 IEEE80211_STYPE_DEAUTH
,
4890 req
->reason_code
, tx
,
4892 ieee80211_destroy_auth_data(sdata
, false);
4893 ieee80211_report_disconnect(sdata
, frame_buf
,
4894 sizeof(frame_buf
), true,
4900 if (ifmgd
->assoc_data
&&
4901 ether_addr_equal(ifmgd
->assoc_data
->bss
->bssid
, req
->bssid
)) {
4903 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4904 req
->bssid
, req
->reason_code
,
4905 ieee80211_get_reason_code_string(req
->reason_code
));
4907 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4908 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4909 IEEE80211_STYPE_DEAUTH
,
4910 req
->reason_code
, tx
,
4912 ieee80211_destroy_assoc_data(sdata
, false);
4913 ieee80211_report_disconnect(sdata
, frame_buf
,
4914 sizeof(frame_buf
), true,
4919 if (ifmgd
->associated
&&
4920 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4922 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4923 req
->bssid
, req
->reason_code
,
4924 ieee80211_get_reason_code_string(req
->reason_code
));
4926 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4927 req
->reason_code
, tx
, frame_buf
);
4928 ieee80211_report_disconnect(sdata
, frame_buf
,
4929 sizeof(frame_buf
), true,
4937 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4938 struct cfg80211_disassoc_request
*req
)
4940 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4942 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4945 * cfg80211 should catch this ... but it's racy since
4946 * we can receive a disassoc frame, process it, hand it
4947 * to cfg80211 while that's in a locked section already
4948 * trying to tell us that the user wants to disconnect.
4950 if (ifmgd
->associated
!= req
->bss
)
4954 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4955 req
->bss
->bssid
, req
->reason_code
, ieee80211_get_reason_code_string(req
->reason_code
));
4957 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4958 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4959 req
->reason_code
, !req
->local_state_change
,
4962 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
4968 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4970 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4973 * Make sure some work items will not run after this,
4974 * they will not do anything but might not have been
4975 * cancelled when disconnecting.
4977 cancel_work_sync(&ifmgd
->monitor_work
);
4978 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4979 cancel_work_sync(&ifmgd
->request_smps_work
);
4980 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4981 cancel_work_sync(&ifmgd
->chswitch_work
);
4982 cancel_delayed_work_sync(&ifmgd
->tdls_peer_del_work
);
4985 if (ifmgd
->assoc_data
) {
4986 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
4987 ieee80211_destroy_assoc_data(sdata
, false);
4988 cfg80211_assoc_timeout(sdata
->dev
, bss
);
4990 if (ifmgd
->auth_data
)
4991 ieee80211_destroy_auth_data(sdata
, false);
4992 spin_lock_bh(&ifmgd
->teardown_lock
);
4993 if (ifmgd
->teardown_skb
) {
4994 kfree_skb(ifmgd
->teardown_skb
);
4995 ifmgd
->teardown_skb
= NULL
;
4996 ifmgd
->orig_teardown_skb
= NULL
;
4998 spin_unlock_bh(&ifmgd
->teardown_lock
);
4999 del_timer_sync(&ifmgd
->timer
);
5000 sdata_unlock(sdata
);
5003 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
5004 enum nl80211_cqm_rssi_threshold_event rssi_event
,
5007 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
5009 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
5011 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
5013 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
5015 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif
*vif
, gfp_t gfp
)
5017 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
5019 trace_api_cqm_beacon_loss_notify(sdata
->local
, sdata
);
5021 cfg80211_cqm_beacon_loss_notify(sdata
->dev
, gfp
);
5023 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify
);