2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 Intel Deutschland GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/pm_qos.h>
24 #include <linux/crc32.h>
25 #include <linux/slab.h>
26 #include <linux/export.h>
27 #include <net/mac80211.h>
28 #include <asm/unaligned.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
45 static int max_nullfunc_tries
= 2;
46 module_param(max_nullfunc_tries
, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries
,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
50 static int max_probe_tries
= 5;
51 module_param(max_probe_tries
, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries
,
53 "Maximum probe tries before disconnecting (reason 4).");
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
63 static int beacon_loss_count
= 7;
64 module_param(beacon_loss_count
, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count
,
66 "Number of beacon intervals before we decide beacon was lost.");
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
78 static int probe_wait_ms
= 500;
79 module_param(probe_wait_ms
, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms
,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
100 static void run_again(struct ieee80211_sub_if_data
*sdata
,
101 unsigned long timeout
)
103 sdata_assert_lock(sdata
);
105 if (!timer_pending(&sdata
->u
.mgd
.timer
) ||
106 time_before(timeout
, sdata
->u
.mgd
.timer
.expires
))
107 mod_timer(&sdata
->u
.mgd
.timer
, timeout
);
110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
112 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
115 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
118 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
119 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
124 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
126 if (unlikely(!sdata
->u
.mgd
.associated
))
129 ifmgd
->probe_send_count
= 0;
131 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
134 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
135 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
138 static int ecw2cw(int ecw
)
140 return (1 << ecw
) - 1;
144 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
145 struct ieee80211_supported_band
*sband
,
146 struct ieee80211_channel
*channel
,
147 const struct ieee80211_ht_cap
*ht_cap
,
148 const struct ieee80211_ht_operation
*ht_oper
,
149 const struct ieee80211_vht_operation
*vht_oper
,
150 struct cfg80211_chan_def
*chandef
, bool tracking
)
152 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
153 struct cfg80211_chan_def vht_chandef
;
154 struct ieee80211_sta_ht_cap sta_ht_cap
;
157 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
158 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
160 chandef
->chan
= channel
;
161 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
162 chandef
->center_freq1
= channel
->center_freq
;
163 chandef
->center_freq2
= 0;
165 if (!ht_cap
|| !ht_oper
|| !sta_ht_cap
.ht_supported
) {
166 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
170 chandef
->width
= NL80211_CHAN_WIDTH_20
;
172 if (!(ht_cap
->cap_info
&
173 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
))) {
174 ret
= IEEE80211_STA_DISABLE_40MHZ
;
175 vht_chandef
= *chandef
;
179 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
181 /* check that channel matches the right operating channel */
182 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
184 * It's possible that some APs are confused here;
185 * Netgear WNDR3700 sometimes reports 4 higher than
186 * the actual channel in association responses, but
187 * since we look at probe response/beacon data here
191 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
192 channel
->center_freq
, ht_cfreq
,
193 ht_oper
->primary_chan
, channel
->band
);
194 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
198 /* check 40 MHz support, if we have it */
199 if (sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
200 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
201 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
202 chandef
->width
= NL80211_CHAN_WIDTH_40
;
203 chandef
->center_freq1
+= 10;
205 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
206 chandef
->width
= NL80211_CHAN_WIDTH_40
;
207 chandef
->center_freq1
-= 10;
211 /* 40 MHz (and 80 MHz) must be supported for VHT */
212 ret
= IEEE80211_STA_DISABLE_VHT
;
213 /* also mark 40 MHz disabled */
214 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
218 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
219 ret
= IEEE80211_STA_DISABLE_VHT
;
223 vht_chandef
.chan
= channel
;
224 vht_chandef
.center_freq1
=
225 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
227 vht_chandef
.center_freq2
= 0;
229 switch (vht_oper
->chan_width
) {
230 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
231 vht_chandef
.width
= chandef
->width
;
232 vht_chandef
.center_freq1
= chandef
->center_freq1
;
234 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
235 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
237 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
238 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
240 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
241 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
242 vht_chandef
.center_freq2
=
243 ieee80211_channel_to_frequency(
244 vht_oper
->center_freq_seg2_idx
,
248 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
250 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
251 vht_oper
->chan_width
);
252 ret
= IEEE80211_STA_DISABLE_VHT
;
256 if (!cfg80211_chandef_valid(&vht_chandef
)) {
257 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
259 "AP VHT information is invalid, disable VHT\n");
260 ret
= IEEE80211_STA_DISABLE_VHT
;
264 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
269 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
270 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
272 "AP VHT information doesn't match HT, disable VHT\n");
273 ret
= IEEE80211_STA_DISABLE_VHT
;
277 *chandef
= vht_chandef
;
283 * When tracking the current AP, don't do any further checks if the
284 * new chandef is identical to the one we're currently using for the
285 * connection. This keeps us from playing ping-pong with regulatory,
286 * without it the following can happen (for example):
287 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
288 * - AP advertises regdom US
289 * - CRDA loads regdom US with 80 MHz prohibited (old database)
290 * - the code below detects an unsupported channel, downgrades, and
291 * we disconnect from the AP in the caller
292 * - disconnect causes CRDA to reload world regdomain and the game
294 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 * It seems possible that there are still scenarios with CSA or real
297 * bandwidth changes where a this could happen, but those cases are
298 * less common and wouldn't completely prevent using the AP.
301 cfg80211_chandef_identical(chandef
, &sdata
->vif
.bss_conf
.chandef
))
304 /* don't print the message below for VHT mismatch if VHT is disabled */
305 if (ret
& IEEE80211_STA_DISABLE_VHT
)
306 vht_chandef
= *chandef
;
309 * Ignore the DISABLED flag when we're already connected and only
310 * tracking the APs beacon for bandwidth changes - otherwise we
311 * might get disconnected here if we connect to an AP, update our
312 * regulatory information based on the AP's country IE and the
313 * information we have is wrong/outdated and disables the channel
314 * that we're actually using for the connection to the AP.
316 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
318 IEEE80211_CHAN_DISABLED
)) {
319 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
320 ret
= IEEE80211_STA_DISABLE_HT
|
321 IEEE80211_STA_DISABLE_VHT
;
325 ret
|= ieee80211_chandef_downgrade(chandef
);
328 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
330 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
332 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
336 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
337 struct sta_info
*sta
,
338 const struct ieee80211_ht_cap
*ht_cap
,
339 const struct ieee80211_ht_operation
*ht_oper
,
340 const struct ieee80211_vht_operation
*vht_oper
,
341 const u8
*bssid
, u32
*changed
)
343 struct ieee80211_local
*local
= sdata
->local
;
344 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
345 struct ieee80211_supported_band
*sband
;
346 struct ieee80211_channel
*chan
;
347 struct cfg80211_chan_def chandef
;
350 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
353 /* if HT was/is disabled, don't track any bandwidth changes */
354 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
357 /* don't check VHT if we associated as non-VHT station */
358 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
361 if (WARN_ON_ONCE(!sta
))
365 * if bss configuration changed store the new one -
366 * this may be applicable even if channel is identical
368 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
369 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
370 *changed
|= BSS_CHANGED_HT
;
371 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
374 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
375 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
377 /* calculate new channel (type) based on HT/VHT operation IEs */
378 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
,
379 ht_cap
, ht_oper
, vht_oper
,
383 * Downgrade the new channel if we associated with restricted
384 * capabilities. For example, if we associated as a 20 MHz STA
385 * to a 40 MHz AP (due to regulatory, capabilities or config
386 * reasons) then switching to a 40 MHz channel now won't do us
387 * any good -- we couldn't use it with the AP.
389 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
390 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
391 flags
|= ieee80211_chandef_downgrade(&chandef
);
392 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
393 chandef
.width
== NL80211_CHAN_WIDTH_160
)
394 flags
|= ieee80211_chandef_downgrade(&chandef
);
395 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
396 chandef
.width
> NL80211_CHAN_WIDTH_20
)
397 flags
|= ieee80211_chandef_downgrade(&chandef
);
399 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
403 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
404 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
405 chandef
.center_freq1
, chandef
.center_freq2
);
407 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
408 IEEE80211_STA_DISABLE_VHT
|
409 IEEE80211_STA_DISABLE_40MHZ
|
410 IEEE80211_STA_DISABLE_80P80MHZ
|
411 IEEE80211_STA_DISABLE_160MHZ
)) ||
412 !cfg80211_chandef_valid(&chandef
)) {
414 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
419 switch (chandef
.width
) {
420 case NL80211_CHAN_WIDTH_20_NOHT
:
421 case NL80211_CHAN_WIDTH_20
:
422 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
424 case NL80211_CHAN_WIDTH_40
:
425 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
427 case NL80211_CHAN_WIDTH_80
:
428 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
430 case NL80211_CHAN_WIDTH_80P80
:
431 case NL80211_CHAN_WIDTH_160
:
432 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
438 if (new_sta_bw
> sta
->cur_max_bandwidth
)
439 new_sta_bw
= sta
->cur_max_bandwidth
;
441 if (new_sta_bw
< sta
->sta
.bandwidth
) {
442 sta
->sta
.bandwidth
= new_sta_bw
;
443 rate_control_rate_update(local
, sband
, sta
,
444 IEEE80211_RC_BW_CHANGED
);
447 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
450 "AP %pM changed bandwidth to incompatible one - disconnect\n",
455 if (new_sta_bw
> sta
->sta
.bandwidth
) {
456 sta
->sta
.bandwidth
= new_sta_bw
;
457 rate_control_rate_update(local
, sband
, sta
,
458 IEEE80211_RC_BW_CHANGED
);
464 /* frame sending functions */
466 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
467 struct sk_buff
*skb
, u8 ap_ht_param
,
468 struct ieee80211_supported_band
*sband
,
469 struct ieee80211_channel
*channel
,
470 enum ieee80211_smps_mode smps
)
473 u32 flags
= channel
->flags
;
475 struct ieee80211_sta_ht_cap ht_cap
;
477 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
479 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
480 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
482 /* determine capability flags */
485 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
486 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
487 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
488 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
489 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
492 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
493 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
494 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
495 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
501 * If 40 MHz was disabled associate as though we weren't
502 * capable of 40 MHz -- some broken APs will never fall
503 * back to trying to transmit in 20 MHz.
505 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
506 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
507 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
510 /* set SM PS mode properly */
511 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
513 case IEEE80211_SMPS_AUTOMATIC
:
514 case IEEE80211_SMPS_NUM_MODES
:
516 case IEEE80211_SMPS_OFF
:
517 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
518 IEEE80211_HT_CAP_SM_PS_SHIFT
;
520 case IEEE80211_SMPS_STATIC
:
521 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
522 IEEE80211_HT_CAP_SM_PS_SHIFT
;
524 case IEEE80211_SMPS_DYNAMIC
:
525 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
526 IEEE80211_HT_CAP_SM_PS_SHIFT
;
530 /* reserve and fill IE */
531 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
532 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
535 /* This function determines vht capability flags for the association
537 * Note - the function may set the owner of the MU-MIMO capability
539 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
541 struct ieee80211_supported_band
*sband
,
542 struct ieee80211_vht_cap
*ap_vht_cap
)
544 struct ieee80211_local
*local
= sdata
->local
;
547 struct ieee80211_sta_vht_cap vht_cap
;
548 u32 mask
, ap_bf_sts
, our_bf_sts
;
550 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
552 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
553 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
555 /* determine capability flags */
558 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
559 u32 bw
= cap
& IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
561 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
562 if (bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
||
563 bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
)
564 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
567 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
568 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
569 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
573 * Some APs apparently get confused if our capabilities are better
574 * than theirs, so restrict what we advertise in the assoc request.
576 if (!(ap_vht_cap
->vht_cap_info
&
577 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
578 cap
&= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
579 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
);
580 else if (!(ap_vht_cap
->vht_cap_info
&
581 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE
)))
582 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
585 * If some other vif is using the MU-MIMO capablity we cannot associate
586 * using MU-MIMO - this will lead to contradictions in the group-id
588 * Ownership is defined since association request, in order to avoid
589 * simultaneous associations with MU-MIMO.
591 if (cap
& IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
) {
592 bool disable_mu_mimo
= false;
593 struct ieee80211_sub_if_data
*other
;
595 list_for_each_entry_rcu(other
, &local
->interfaces
, list
) {
596 if (other
->flags
& IEEE80211_SDATA_MU_MIMO_OWNER
) {
597 disable_mu_mimo
= true;
602 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
604 sdata
->flags
|= IEEE80211_SDATA_MU_MIMO_OWNER
;
607 mask
= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK
;
609 ap_bf_sts
= le32_to_cpu(ap_vht_cap
->vht_cap_info
) & mask
;
610 our_bf_sts
= cap
& mask
;
612 if (ap_bf_sts
< our_bf_sts
) {
617 /* reserve and fill IE */
618 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
619 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
622 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
624 struct ieee80211_local
*local
= sdata
->local
;
625 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
626 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
628 struct ieee80211_mgmt
*mgmt
;
630 size_t offset
= 0, noffset
;
631 int i
, count
, rates_len
, supp_rates_len
, shift
;
633 struct ieee80211_supported_band
*sband
;
634 struct ieee80211_chanctx_conf
*chanctx_conf
;
635 struct ieee80211_channel
*chan
;
636 u32 rate_flags
, rates
= 0;
638 sdata_assert_lock(sdata
);
641 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
642 if (WARN_ON(!chanctx_conf
)) {
646 chan
= chanctx_conf
->def
.chan
;
647 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
649 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
650 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
652 if (assoc_data
->supp_rates_len
) {
654 * Get all rates supported by the device and the AP as
655 * some APs don't like getting a superset of their rates
656 * in the association request (e.g. D-Link DAP 1353 in
659 rates_len
= ieee80211_parse_bitrates(&chanctx_conf
->def
, sband
,
660 assoc_data
->supp_rates
,
661 assoc_data
->supp_rates_len
,
665 * In case AP not provide any supported rates information
666 * before association, we send information element(s) with
667 * all rates that we support.
670 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
671 if ((rate_flags
& sband
->bitrates
[i
].flags
)
679 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
680 sizeof(*mgmt
) + /* bit too much but doesn't matter */
681 2 + assoc_data
->ssid_len
+ /* SSID */
682 4 + rates_len
+ /* (extended) rates */
683 4 + /* power capability */
684 2 + 2 * sband
->n_channels
+ /* supported channels */
685 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
686 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
687 assoc_data
->ie_len
+ /* extra IEs */
693 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
695 capab
= WLAN_CAPABILITY_ESS
;
697 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
698 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
699 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
702 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
703 capab
|= WLAN_CAPABILITY_PRIVACY
;
705 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
706 ieee80211_hw_check(&local
->hw
, SPECTRUM_MGMT
))
707 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
709 if (ifmgd
->flags
& IEEE80211_STA_ENABLE_RRM
)
710 capab
|= WLAN_CAPABILITY_RADIO_MEASURE
;
712 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
714 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
715 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
716 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
718 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
720 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
721 IEEE80211_STYPE_REASSOC_REQ
);
722 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
723 mgmt
->u
.reassoc_req
.listen_interval
=
724 cpu_to_le16(local
->hw
.conf
.listen_interval
);
725 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
729 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
730 IEEE80211_STYPE_ASSOC_REQ
);
731 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
732 mgmt
->u
.assoc_req
.listen_interval
=
733 cpu_to_le16(local
->hw
.conf
.listen_interval
);
737 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
738 *pos
++ = WLAN_EID_SSID
;
739 *pos
++ = assoc_data
->ssid_len
;
740 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
742 /* add all rates which were marked to be used above */
743 supp_rates_len
= rates_len
;
744 if (supp_rates_len
> 8)
747 pos
= skb_put(skb
, supp_rates_len
+ 2);
748 *pos
++ = WLAN_EID_SUPP_RATES
;
749 *pos
++ = supp_rates_len
;
752 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
753 if (BIT(i
) & rates
) {
754 int rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
762 if (rates_len
> count
) {
763 pos
= skb_put(skb
, rates_len
- count
+ 2);
764 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
765 *pos
++ = rates_len
- count
;
767 for (i
++; i
< sband
->n_bitrates
; i
++) {
768 if (BIT(i
) & rates
) {
770 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
777 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
||
778 capab
& WLAN_CAPABILITY_RADIO_MEASURE
) {
779 pos
= skb_put(skb
, 4);
780 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
782 *pos
++ = 0; /* min tx power */
784 *pos
++ = ieee80211_chandef_max_power(&chanctx_conf
->def
);
787 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
788 /* TODO: get this in reg domain format */
789 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
790 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
791 *pos
++ = 2 * sband
->n_channels
;
792 for (i
= 0; i
< sband
->n_channels
; i
++) {
793 *pos
++ = ieee80211_frequency_to_channel(
794 sband
->channels
[i
].center_freq
);
795 *pos
++ = 1; /* one channel in the subband*/
799 /* if present, add any custom IEs that go before HT */
800 if (assoc_data
->ie_len
) {
801 static const u8 before_ht
[] = {
804 WLAN_EID_EXT_SUPP_RATES
,
805 WLAN_EID_PWR_CAPABILITY
,
806 WLAN_EID_SUPPORTED_CHANNELS
,
809 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
810 WLAN_EID_MOBILITY_DOMAIN
,
811 WLAN_EID_FAST_BSS_TRANSITION
, /* reassoc only */
812 WLAN_EID_RIC_DATA
, /* reassoc only */
813 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
815 static const u8 after_ric
[] = {
816 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
817 WLAN_EID_HT_CAPABILITY
,
818 WLAN_EID_BSS_COEX_2040
,
819 WLAN_EID_EXT_CAPABILITY
,
820 WLAN_EID_QOS_TRAFFIC_CAPA
,
821 WLAN_EID_TIM_BCAST_REQ
,
822 WLAN_EID_INTERWORKING
,
823 /* 60GHz doesn't happen right now */
824 WLAN_EID_VHT_CAPABILITY
,
825 WLAN_EID_OPMODE_NOTIF
,
828 noffset
= ieee80211_ie_split_ric(assoc_data
->ie
,
831 ARRAY_SIZE(before_ht
),
833 ARRAY_SIZE(after_ric
),
835 pos
= skb_put(skb
, noffset
- offset
);
836 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
840 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
841 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
842 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
844 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
845 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
846 sband
, chan
, sdata
->smps_mode
);
848 /* if present, add any custom IEs that go before VHT */
849 if (assoc_data
->ie_len
) {
850 static const u8 before_vht
[] = {
853 WLAN_EID_EXT_SUPP_RATES
,
854 WLAN_EID_PWR_CAPABILITY
,
855 WLAN_EID_SUPPORTED_CHANNELS
,
858 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
859 WLAN_EID_MOBILITY_DOMAIN
,
860 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
861 WLAN_EID_HT_CAPABILITY
,
862 WLAN_EID_BSS_COEX_2040
,
863 WLAN_EID_EXT_CAPABILITY
,
864 WLAN_EID_QOS_TRAFFIC_CAPA
,
865 WLAN_EID_TIM_BCAST_REQ
,
866 WLAN_EID_INTERWORKING
,
869 /* RIC already taken above, so no need to handle here anymore */
870 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
871 before_vht
, ARRAY_SIZE(before_vht
),
873 pos
= skb_put(skb
, noffset
- offset
);
874 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
878 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
879 ieee80211_add_vht_ie(sdata
, skb
, sband
,
880 &assoc_data
->ap_vht_cap
);
882 /* if present, add any custom non-vendor IEs that go after HT */
883 if (assoc_data
->ie_len
) {
884 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
887 pos
= skb_put(skb
, noffset
- offset
);
888 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
892 if (assoc_data
->wmm
) {
893 if (assoc_data
->uapsd
) {
894 qos_info
= ifmgd
->uapsd_queues
;
895 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
896 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
901 pos
= ieee80211_add_wmm_info_ie(skb_put(skb
, 9), qos_info
);
904 /* add any remaining custom (i.e. vendor specific here) IEs */
905 if (assoc_data
->ie_len
) {
906 noffset
= assoc_data
->ie_len
;
907 pos
= skb_put(skb
, noffset
- offset
);
908 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
911 drv_mgd_prepare_tx(local
, sdata
);
913 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
914 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
915 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
916 IEEE80211_TX_INTFL_MLME_CONN_TX
;
917 ieee80211_tx_skb(sdata
, skb
);
920 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
921 struct ieee80211_sub_if_data
*sdata
)
923 struct ieee80211_pspoll
*pspoll
;
926 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
930 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
931 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
933 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
934 ieee80211_tx_skb(sdata
, skb
);
937 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
938 struct ieee80211_sub_if_data
*sdata
,
942 struct ieee80211_hdr_3addr
*nullfunc
;
943 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
945 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
949 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
951 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
953 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
954 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
956 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
957 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
959 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
960 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
962 ieee80211_tx_skb(sdata
, skb
);
965 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
966 struct ieee80211_sub_if_data
*sdata
)
969 struct ieee80211_hdr
*nullfunc
;
972 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
975 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
979 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
981 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
982 memset(nullfunc
, 0, 30);
983 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
984 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
985 nullfunc
->frame_control
= fc
;
986 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
987 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
988 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
989 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
991 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
992 ieee80211_tx_skb(sdata
, skb
);
995 /* spectrum management related things */
996 static void ieee80211_chswitch_work(struct work_struct
*work
)
998 struct ieee80211_sub_if_data
*sdata
=
999 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
1000 struct ieee80211_local
*local
= sdata
->local
;
1001 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1004 if (!ieee80211_sdata_running(sdata
))
1008 mutex_lock(&local
->mtx
);
1009 mutex_lock(&local
->chanctx_mtx
);
1011 if (!ifmgd
->associated
)
1014 if (!sdata
->vif
.csa_active
)
1018 * using reservation isn't immediate as it may be deferred until later
1019 * with multi-vif. once reservation is complete it will re-schedule the
1020 * work with no reserved_chanctx so verify chandef to check if it
1021 * completed successfully
1024 if (sdata
->reserved_chanctx
) {
1026 * with multi-vif csa driver may call ieee80211_csa_finish()
1027 * many times while waiting for other interfaces to use their
1030 if (sdata
->reserved_ready
)
1033 ret
= ieee80211_vif_use_reserved_context(sdata
);
1036 "failed to use reserved channel context, disconnecting (err=%d)\n",
1038 ieee80211_queue_work(&sdata
->local
->hw
,
1039 &ifmgd
->csa_connection_drop_work
);
1046 if (!cfg80211_chandef_identical(&sdata
->vif
.bss_conf
.chandef
,
1047 &sdata
->csa_chandef
)) {
1049 "failed to finalize channel switch, disconnecting\n");
1050 ieee80211_queue_work(&sdata
->local
->hw
,
1051 &ifmgd
->csa_connection_drop_work
);
1055 /* XXX: shouldn't really modify cfg80211-owned data! */
1056 ifmgd
->associated
->channel
= sdata
->csa_chandef
.chan
;
1058 ifmgd
->csa_waiting_bcn
= true;
1060 ieee80211_sta_reset_beacon_monitor(sdata
);
1061 ieee80211_sta_reset_conn_monitor(sdata
);
1064 mutex_unlock(&local
->chanctx_mtx
);
1065 mutex_unlock(&local
->mtx
);
1066 sdata_unlock(sdata
);
1069 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data
*sdata
)
1071 struct ieee80211_local
*local
= sdata
->local
;
1072 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1075 sdata_assert_lock(sdata
);
1077 WARN_ON(!sdata
->vif
.csa_active
);
1079 if (sdata
->csa_block_tx
) {
1080 ieee80211_wake_vif_queues(local
, sdata
,
1081 IEEE80211_QUEUE_STOP_REASON_CSA
);
1082 sdata
->csa_block_tx
= false;
1085 sdata
->vif
.csa_active
= false;
1086 ifmgd
->csa_waiting_bcn
= false;
1088 ret
= drv_post_channel_switch(sdata
);
1091 "driver post channel switch failed, disconnecting\n");
1092 ieee80211_queue_work(&local
->hw
,
1093 &ifmgd
->csa_connection_drop_work
);
1097 cfg80211_ch_switch_notify(sdata
->dev
, &sdata
->reserved_chandef
);
1100 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
1102 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1103 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1105 trace_api_chswitch_done(sdata
, success
);
1108 "driver channel switch failed, disconnecting\n");
1109 ieee80211_queue_work(&sdata
->local
->hw
,
1110 &ifmgd
->csa_connection_drop_work
);
1112 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1115 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1117 static void ieee80211_chswitch_timer(unsigned long data
)
1119 struct ieee80211_sub_if_data
*sdata
=
1120 (struct ieee80211_sub_if_data
*) data
;
1122 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1126 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1127 u64 timestamp
, u32 device_timestamp
,
1128 struct ieee802_11_elems
*elems
,
1131 struct ieee80211_local
*local
= sdata
->local
;
1132 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1133 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1134 struct ieee80211_chanctx_conf
*conf
;
1135 struct ieee80211_chanctx
*chanctx
;
1136 enum ieee80211_band current_band
;
1137 struct ieee80211_csa_ie csa_ie
;
1138 struct ieee80211_channel_switch ch_switch
;
1141 sdata_assert_lock(sdata
);
1146 if (local
->scanning
)
1149 /* disregard subsequent announcements if we are already processing */
1150 if (sdata
->vif
.csa_active
)
1153 current_band
= cbss
->channel
->band
;
1154 memset(&csa_ie
, 0, sizeof(csa_ie
));
1155 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, current_band
,
1157 ifmgd
->associated
->bssid
, &csa_ie
);
1159 ieee80211_queue_work(&local
->hw
,
1160 &ifmgd
->csa_connection_drop_work
);
1164 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
1165 IEEE80211_CHAN_DISABLED
)) {
1167 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1168 ifmgd
->associated
->bssid
,
1169 csa_ie
.chandef
.chan
->center_freq
,
1170 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
1171 csa_ie
.chandef
.center_freq2
);
1172 ieee80211_queue_work(&local
->hw
,
1173 &ifmgd
->csa_connection_drop_work
);
1177 if (cfg80211_chandef_identical(&csa_ie
.chandef
,
1178 &sdata
->vif
.bss_conf
.chandef
)) {
1179 if (ifmgd
->csa_ignored_same_chan
)
1182 "AP %pM tries to chanswitch to same channel, ignore\n",
1183 ifmgd
->associated
->bssid
);
1184 ifmgd
->csa_ignored_same_chan
= true;
1189 * Drop all TDLS peers - either we disconnect or move to a different
1190 * channel from this point on. There's no telling what our peer will do.
1191 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1192 * have an incompatible wider chandef.
1194 ieee80211_teardown_tdls_peers(sdata
);
1196 mutex_lock(&local
->mtx
);
1197 mutex_lock(&local
->chanctx_mtx
);
1198 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1199 lockdep_is_held(&local
->chanctx_mtx
));
1202 "no channel context assigned to vif?, disconnecting\n");
1203 goto drop_connection
;
1206 chanctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1208 if (local
->use_chanctx
&&
1209 !ieee80211_hw_check(&local
->hw
, CHANCTX_STA_CSA
)) {
1211 "driver doesn't support chan-switch with channel contexts\n");
1212 goto drop_connection
;
1215 ch_switch
.timestamp
= timestamp
;
1216 ch_switch
.device_timestamp
= device_timestamp
;
1217 ch_switch
.block_tx
= csa_ie
.mode
;
1218 ch_switch
.chandef
= csa_ie
.chandef
;
1219 ch_switch
.count
= csa_ie
.count
;
1221 if (drv_pre_channel_switch(sdata
, &ch_switch
)) {
1223 "preparing for channel switch failed, disconnecting\n");
1224 goto drop_connection
;
1227 res
= ieee80211_vif_reserve_chanctx(sdata
, &csa_ie
.chandef
,
1228 chanctx
->mode
, false);
1231 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1233 goto drop_connection
;
1235 mutex_unlock(&local
->chanctx_mtx
);
1237 sdata
->vif
.csa_active
= true;
1238 sdata
->csa_chandef
= csa_ie
.chandef
;
1239 sdata
->csa_block_tx
= csa_ie
.mode
;
1240 ifmgd
->csa_ignored_same_chan
= false;
1242 if (sdata
->csa_block_tx
)
1243 ieee80211_stop_vif_queues(local
, sdata
,
1244 IEEE80211_QUEUE_STOP_REASON_CSA
);
1245 mutex_unlock(&local
->mtx
);
1247 cfg80211_ch_switch_started_notify(sdata
->dev
, &csa_ie
.chandef
,
1250 if (local
->ops
->channel_switch
) {
1251 /* use driver's channel switch callback */
1252 drv_channel_switch(local
, sdata
, &ch_switch
);
1256 /* channel switch handled in software */
1257 if (csa_ie
.count
<= 1)
1258 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1260 mod_timer(&ifmgd
->chswitch_timer
,
1261 TU_TO_EXP_TIME((csa_ie
.count
- 1) *
1262 cbss
->beacon_interval
));
1265 ieee80211_queue_work(&local
->hw
, &ifmgd
->csa_connection_drop_work
);
1266 mutex_unlock(&local
->chanctx_mtx
);
1267 mutex_unlock(&local
->mtx
);
1271 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1272 struct ieee80211_channel
*channel
,
1273 const u8
*country_ie
, u8 country_ie_len
,
1274 const u8
*pwr_constr_elem
,
1275 int *chan_pwr
, int *pwr_reduction
)
1277 struct ieee80211_country_ie_triplet
*triplet
;
1278 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1279 int i
, chan_increment
;
1280 bool have_chan_pwr
= false;
1283 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1286 triplet
= (void *)(country_ie
+ 3);
1287 country_ie_len
-= 3;
1289 switch (channel
->band
) {
1293 case IEEE80211_BAND_2GHZ
:
1294 case IEEE80211_BAND_60GHZ
:
1297 case IEEE80211_BAND_5GHZ
:
1303 while (country_ie_len
>= 3) {
1304 u8 first_channel
= triplet
->chans
.first_channel
;
1306 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1309 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1310 if (first_channel
+ i
* chan_increment
== chan
) {
1311 have_chan_pwr
= true;
1312 *chan_pwr
= triplet
->chans
.max_power
;
1321 country_ie_len
-= 3;
1324 if (have_chan_pwr
&& pwr_constr_elem
)
1325 *pwr_reduction
= *pwr_constr_elem
;
1329 return have_chan_pwr
;
1332 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data
*sdata
,
1333 struct ieee80211_channel
*channel
,
1334 const u8
*cisco_dtpc_ie
,
1337 /* From practical testing, the first data byte of the DTPC element
1338 * seems to contain the requested dBm level, and the CLI on Cisco
1339 * APs clearly state the range is -127 to 127 dBm, which indicates
1340 * a signed byte, although it seemingly never actually goes negative.
1341 * The other byte seems to always be zero.
1343 *pwr_level
= (__s8
)cisco_dtpc_ie
[4];
1346 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1347 struct ieee80211_channel
*channel
,
1348 struct ieee80211_mgmt
*mgmt
,
1349 const u8
*country_ie
, u8 country_ie_len
,
1350 const u8
*pwr_constr_ie
,
1351 const u8
*cisco_dtpc_ie
)
1353 bool has_80211h_pwr
= false, has_cisco_pwr
= false;
1354 int chan_pwr
= 0, pwr_reduction_80211h
= 0;
1355 int pwr_level_cisco
, pwr_level_80211h
;
1357 __le16 capab
= mgmt
->u
.probe_resp
.capab_info
;
1360 (capab
& cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
) ||
1361 capab
& cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE
))) {
1362 has_80211h_pwr
= ieee80211_find_80211h_pwr_constr(
1363 sdata
, channel
, country_ie
, country_ie_len
,
1364 pwr_constr_ie
, &chan_pwr
, &pwr_reduction_80211h
);
1366 max_t(int, 0, chan_pwr
- pwr_reduction_80211h
);
1369 if (cisco_dtpc_ie
) {
1370 ieee80211_find_cisco_dtpc(
1371 sdata
, channel
, cisco_dtpc_ie
, &pwr_level_cisco
);
1372 has_cisco_pwr
= true;
1375 if (!has_80211h_pwr
&& !has_cisco_pwr
)
1378 /* If we have both 802.11h and Cisco DTPC, apply both limits
1379 * by picking the smallest of the two power levels advertised.
1381 if (has_80211h_pwr
&&
1382 (!has_cisco_pwr
|| pwr_level_80211h
<= pwr_level_cisco
)) {
1384 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1385 pwr_level_80211h
, chan_pwr
, pwr_reduction_80211h
,
1386 sdata
->u
.mgd
.bssid
);
1387 new_ap_level
= pwr_level_80211h
;
1388 } else { /* has_cisco_pwr is always true here. */
1390 "Limiting TX power to %d dBm as advertised by %pM\n",
1391 pwr_level_cisco
, sdata
->u
.mgd
.bssid
);
1392 new_ap_level
= pwr_level_cisco
;
1395 if (sdata
->ap_power_level
== new_ap_level
)
1398 sdata
->ap_power_level
= new_ap_level
;
1399 if (__ieee80211_recalc_txpower(sdata
))
1400 return BSS_CHANGED_TXPOWER
;
1405 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1406 struct ieee80211_sub_if_data
*sdata
)
1408 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1411 * If we are scanning right now then the parameters will
1412 * take effect when scan finishes.
1414 if (local
->scanning
)
1417 if (conf
->dynamic_ps_timeout
> 0 &&
1418 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
)) {
1419 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1420 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1422 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
))
1423 ieee80211_send_nullfunc(local
, sdata
, true);
1425 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1426 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
1429 conf
->flags
|= IEEE80211_CONF_PS
;
1430 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1434 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1436 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1438 if (local
->ps_sdata
) {
1439 ieee80211_enable_ps(local
, local
->ps_sdata
);
1440 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1441 conf
->flags
&= ~IEEE80211_CONF_PS
;
1442 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1443 del_timer_sync(&local
->dynamic_ps_timer
);
1444 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1448 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1450 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1451 struct sta_info
*sta
= NULL
;
1452 bool authorized
= false;
1454 if (!mgd
->powersave
)
1460 if (!mgd
->associated
)
1463 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1466 if (!mgd
->have_beacon
)
1470 sta
= sta_info_get(sdata
, mgd
->bssid
);
1472 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1478 /* need to hold RTNL or interface lock */
1479 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1481 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1485 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
)) {
1486 local
->ps_sdata
= NULL
;
1490 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1491 if (!ieee80211_sdata_running(sdata
))
1493 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1494 /* If an AP vif is found, then disable PS
1495 * by setting the count to zero thereby setting
1501 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1507 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1511 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1513 beaconint_us
= ieee80211_tu_to_usec(
1514 found
->vif
.bss_conf
.beacon_int
);
1516 timeout
= local
->dynamic_ps_forced_timeout
;
1519 * Go to full PSM if the user configures a very low
1520 * latency requirement.
1521 * The 2000 second value is there for compatibility
1522 * until the PM_QOS_NETWORK_LATENCY is configured
1525 if (latency
> (1900 * USEC_PER_MSEC
) &&
1526 latency
!= (2000 * USEC_PER_SEC
))
1531 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1533 if (beaconint_us
> latency
) {
1534 local
->ps_sdata
= NULL
;
1537 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1539 /* If the TIM IE is invalid, pretend the value is 1 */
1542 else if (dtimper
> 1)
1543 maxslp
= min_t(int, dtimper
,
1544 latency
/ beaconint_us
);
1546 local
->hw
.conf
.max_sleep_period
= maxslp
;
1547 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1548 local
->ps_sdata
= found
;
1551 local
->ps_sdata
= NULL
;
1554 ieee80211_change_ps(local
);
1557 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1559 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1561 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1562 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1563 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1567 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1569 struct ieee80211_local
*local
=
1570 container_of(work
, struct ieee80211_local
,
1571 dynamic_ps_disable_work
);
1573 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1574 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1575 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1578 ieee80211_wake_queues_by_reason(&local
->hw
,
1579 IEEE80211_MAX_QUEUE_MAP
,
1580 IEEE80211_QUEUE_STOP_REASON_PS
,
1584 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1586 struct ieee80211_local
*local
=
1587 container_of(work
, struct ieee80211_local
,
1588 dynamic_ps_enable_work
);
1589 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1590 struct ieee80211_if_managed
*ifmgd
;
1591 unsigned long flags
;
1594 /* can only happen when PS was just disabled anyway */
1598 ifmgd
= &sdata
->u
.mgd
;
1600 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1603 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1604 /* don't enter PS if TX frames are pending */
1605 if (drv_tx_frames_pending(local
)) {
1606 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1608 local
->hw
.conf
.dynamic_ps_timeout
));
1613 * transmission can be stopped by others which leads to
1614 * dynamic_ps_timer expiry. Postpone the ps timer if it
1615 * is not the actual idle state.
1617 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1618 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1619 if (local
->queue_stop_reasons
[q
]) {
1620 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1622 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1624 local
->hw
.conf
.dynamic_ps_timeout
));
1628 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1631 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1632 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1633 if (drv_tx_frames_pending(local
)) {
1634 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1636 local
->hw
.conf
.dynamic_ps_timeout
));
1638 ieee80211_send_nullfunc(local
, sdata
, true);
1639 /* Flush to get the tx status of nullfunc frame */
1640 ieee80211_flush_queues(local
, sdata
, false);
1644 if (!(ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
) &&
1645 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
)) ||
1646 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1647 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1648 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1649 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1653 void ieee80211_dynamic_ps_timer(unsigned long data
)
1655 struct ieee80211_local
*local
= (void *) data
;
1657 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1660 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1662 struct delayed_work
*delayed_work
=
1663 container_of(work
, struct delayed_work
, work
);
1664 struct ieee80211_sub_if_data
*sdata
=
1665 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1666 dfs_cac_timer_work
);
1667 struct cfg80211_chan_def chandef
= sdata
->vif
.bss_conf
.chandef
;
1669 mutex_lock(&sdata
->local
->mtx
);
1670 if (sdata
->wdev
.cac_started
) {
1671 ieee80211_vif_release_channel(sdata
);
1672 cfg80211_cac_event(sdata
->dev
, &chandef
,
1673 NL80211_RADAR_CAC_FINISHED
,
1676 mutex_unlock(&sdata
->local
->mtx
);
1680 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1682 struct ieee80211_local
*local
= sdata
->local
;
1683 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1687 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1690 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1691 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
1693 unsigned long now
= jiffies
;
1695 if (tx_tspec
->action
== TX_TSPEC_ACTION_NONE
&&
1696 tx_tspec
->admitted_time
&&
1697 time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1698 tx_tspec
->consumed_tx_time
= 0;
1699 tx_tspec
->time_slice_start
= now
;
1701 if (tx_tspec
->downgraded
)
1703 TX_TSPEC_ACTION_STOP_DOWNGRADE
;
1706 switch (tx_tspec
->action
) {
1707 case TX_TSPEC_ACTION_STOP_DOWNGRADE
:
1708 /* take the original parameters */
1709 if (drv_conf_tx(local
, sdata
, ac
, &sdata
->tx_conf
[ac
]))
1711 "failed to set TX queue parameters for queue %d\n",
1713 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1714 tx_tspec
->downgraded
= false;
1717 case TX_TSPEC_ACTION_DOWNGRADE
:
1718 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1719 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1723 /* downgrade next lower non-ACM AC */
1724 for (non_acm_ac
= ac
+ 1;
1725 non_acm_ac
< IEEE80211_NUM_ACS
;
1727 if (!(sdata
->wmm_acm
& BIT(7 - 2 * non_acm_ac
)))
1729 /* The loop will result in using BK even if it requires
1730 * admission control, such configuration makes no sense
1731 * and we have to transmit somehow - the AC selection
1732 * does the same thing.
1734 if (drv_conf_tx(local
, sdata
, ac
,
1735 &sdata
->tx_conf
[non_acm_ac
]))
1737 "failed to set TX queue parameters for queue %d\n",
1739 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1741 schedule_delayed_work(&ifmgd
->tx_tspec_wk
,
1742 tx_tspec
->time_slice_start
+ HZ
- now
+ 1);
1744 case TX_TSPEC_ACTION_NONE
:
1753 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1755 if (__ieee80211_sta_handle_tspec_ac_params(sdata
))
1756 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
1759 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct
*work
)
1761 struct ieee80211_sub_if_data
*sdata
;
1763 sdata
= container_of(work
, struct ieee80211_sub_if_data
,
1764 u
.mgd
.tx_tspec_wk
.work
);
1765 ieee80211_sta_handle_tspec_ac_params(sdata
);
1769 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1770 struct ieee80211_sub_if_data
*sdata
,
1771 const u8
*wmm_param
, size_t wmm_param_len
)
1773 struct ieee80211_tx_queue_params params
;
1774 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1778 u8 uapsd_queues
= 0;
1780 if (!local
->ops
->conf_tx
)
1783 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1789 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1792 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1793 uapsd_queues
= ifmgd
->uapsd_queues
;
1795 count
= wmm_param
[6] & 0x0f;
1796 if (count
== ifmgd
->wmm_last_param_set
)
1798 ifmgd
->wmm_last_param_set
= count
;
1800 pos
= wmm_param
+ 8;
1801 left
= wmm_param_len
- 8;
1803 memset(¶ms
, 0, sizeof(params
));
1806 for (; left
>= 4; left
-= 4, pos
+= 4) {
1807 int aci
= (pos
[0] >> 5) & 0x03;
1808 int acm
= (pos
[0] >> 4) & 0x01;
1816 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1817 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1823 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1824 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1830 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1831 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1838 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1839 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1844 params
.aifs
= pos
[0] & 0x0f;
1845 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1846 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1847 params
.txop
= get_unaligned_le16(pos
+ 2);
1849 params
.uapsd
= uapsd
;
1852 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1854 params
.aifs
, params
.cw_min
, params
.cw_max
,
1855 params
.txop
, params
.uapsd
,
1856 ifmgd
->tx_tspec
[queue
].downgraded
);
1857 sdata
->tx_conf
[queue
] = params
;
1858 if (!ifmgd
->tx_tspec
[queue
].downgraded
&&
1859 drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1861 "failed to set TX queue parameters for queue %d\n",
1865 /* enable WMM or activate new settings */
1866 sdata
->vif
.bss_conf
.qos
= true;
1870 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1872 lockdep_assert_held(&sdata
->local
->mtx
);
1874 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1875 ieee80211_run_deferred_scan(sdata
->local
);
1878 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1880 mutex_lock(&sdata
->local
->mtx
);
1881 __ieee80211_stop_poll(sdata
);
1882 mutex_unlock(&sdata
->local
->mtx
);
1885 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1886 u16 capab
, bool erp_valid
, u8 erp
)
1888 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1890 bool use_protection
;
1891 bool use_short_preamble
;
1892 bool use_short_slot
;
1895 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1896 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1898 use_protection
= false;
1899 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1902 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1903 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1904 use_short_slot
= true;
1906 if (use_protection
!= bss_conf
->use_cts_prot
) {
1907 bss_conf
->use_cts_prot
= use_protection
;
1908 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1911 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1912 bss_conf
->use_short_preamble
= use_short_preamble
;
1913 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1916 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1917 bss_conf
->use_short_slot
= use_short_slot
;
1918 changed
|= BSS_CHANGED_ERP_SLOT
;
1924 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1925 struct cfg80211_bss
*cbss
,
1926 u32 bss_info_changed
)
1928 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1929 struct ieee80211_local
*local
= sdata
->local
;
1930 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1932 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1933 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1934 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1936 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1937 beacon_loss_count
* bss_conf
->beacon_int
));
1939 sdata
->u
.mgd
.associated
= cbss
;
1940 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1942 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1944 if (sdata
->vif
.p2p
) {
1945 const struct cfg80211_bss_ies
*ies
;
1948 ies
= rcu_dereference(cbss
->ies
);
1952 ret
= cfg80211_get_p2p_attr(
1953 ies
->data
, ies
->len
,
1954 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1955 (u8
*) &bss_conf
->p2p_noa_attr
,
1956 sizeof(bss_conf
->p2p_noa_attr
));
1958 sdata
->u
.mgd
.p2p_noa_index
=
1959 bss_conf
->p2p_noa_attr
.index
;
1960 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1966 /* just to be sure */
1967 ieee80211_stop_poll(sdata
);
1969 ieee80211_led_assoc(local
, 1);
1971 if (sdata
->u
.mgd
.have_beacon
) {
1973 * If the AP is buggy we may get here with no DTIM period
1974 * known, so assume it's 1 which is the only safe assumption
1975 * in that case, although if the TIM IE is broken powersave
1976 * probably just won't work at all.
1978 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1979 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1980 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1982 bss_conf
->beacon_rate
= NULL
;
1983 bss_conf
->dtim_period
= 0;
1986 bss_conf
->assoc
= 1;
1988 /* Tell the driver to monitor connection quality (if supported) */
1989 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1990 bss_conf
->cqm_rssi_thold
)
1991 bss_info_changed
|= BSS_CHANGED_CQM
;
1993 /* Enable ARP filtering */
1994 if (bss_conf
->arp_addr_cnt
)
1995 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1997 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1999 mutex_lock(&local
->iflist_mtx
);
2000 ieee80211_recalc_ps(local
, -1);
2001 mutex_unlock(&local
->iflist_mtx
);
2003 ieee80211_recalc_smps(sdata
);
2004 ieee80211_recalc_ps_vif(sdata
);
2006 netif_carrier_on(sdata
->dev
);
2009 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
2010 u16 stype
, u16 reason
, bool tx
,
2013 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2014 struct ieee80211_local
*local
= sdata
->local
;
2017 sdata_assert_lock(sdata
);
2019 if (WARN_ON_ONCE(tx
&& !frame_buf
))
2022 if (WARN_ON(!ifmgd
->associated
))
2025 ieee80211_stop_poll(sdata
);
2027 ifmgd
->associated
= NULL
;
2028 netif_carrier_off(sdata
->dev
);
2031 * if we want to get out of ps before disassoc (why?) we have
2032 * to do it before sending disassoc, as otherwise the null-packet
2035 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2036 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2037 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2039 local
->ps_sdata
= NULL
;
2041 /* disable per-vif ps */
2042 ieee80211_recalc_ps_vif(sdata
);
2044 /* make sure ongoing transmission finishes */
2048 * drop any frame before deauth/disassoc, this can be data or
2049 * management frame. Since we are disconnecting, we should not
2050 * insist sending these frames which can take time and delay
2051 * the disconnection and possible the roaming.
2054 ieee80211_flush_queues(local
, sdata
, true);
2056 /* deauthenticate/disassociate now */
2057 if (tx
|| frame_buf
)
2058 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
2059 reason
, tx
, frame_buf
);
2061 /* flush out frame - make sure the deauth was actually sent */
2063 ieee80211_flush_queues(local
, sdata
, false);
2065 /* clear bssid only after building the needed mgmt frames */
2066 eth_zero_addr(ifmgd
->bssid
);
2068 /* remove AP and TDLS peers */
2069 sta_info_flush(sdata
);
2071 /* finally reset all BSS / config parameters */
2072 changed
|= ieee80211_reset_erp_info(sdata
);
2074 ieee80211_led_assoc(local
, 0);
2075 changed
|= BSS_CHANGED_ASSOC
;
2076 sdata
->vif
.bss_conf
.assoc
= false;
2078 ifmgd
->p2p_noa_index
= -1;
2079 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
2080 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
2082 /* on the next assoc, re-program HT/VHT parameters */
2083 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
2084 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
2085 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
2086 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
2087 sdata
->flags
&= ~IEEE80211_SDATA_MU_MIMO_OWNER
;
2089 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
2091 del_timer_sync(&local
->dynamic_ps_timer
);
2092 cancel_work_sync(&local
->dynamic_ps_enable_work
);
2094 /* Disable ARP filtering */
2095 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
2096 changed
|= BSS_CHANGED_ARP_FILTER
;
2098 sdata
->vif
.bss_conf
.qos
= false;
2099 changed
|= BSS_CHANGED_QOS
;
2101 /* The BSSID (not really interesting) and HT changed */
2102 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
2103 ieee80211_bss_info_change_notify(sdata
, changed
);
2105 /* disassociated - set to defaults now */
2106 ieee80211_set_wmm_default(sdata
, false);
2108 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
2109 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
2110 del_timer_sync(&sdata
->u
.mgd
.timer
);
2111 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
2113 sdata
->vif
.bss_conf
.dtim_period
= 0;
2114 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
2116 ifmgd
->have_beacon
= false;
2119 mutex_lock(&local
->mtx
);
2120 ieee80211_vif_release_channel(sdata
);
2122 sdata
->vif
.csa_active
= false;
2123 ifmgd
->csa_waiting_bcn
= false;
2124 ifmgd
->csa_ignored_same_chan
= false;
2125 if (sdata
->csa_block_tx
) {
2126 ieee80211_wake_vif_queues(local
, sdata
,
2127 IEEE80211_QUEUE_STOP_REASON_CSA
);
2128 sdata
->csa_block_tx
= false;
2130 mutex_unlock(&local
->mtx
);
2132 /* existing TX TSPEC sessions no longer exist */
2133 memset(ifmgd
->tx_tspec
, 0, sizeof(ifmgd
->tx_tspec
));
2134 cancel_delayed_work_sync(&ifmgd
->tx_tspec_wk
);
2136 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2139 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
2140 struct ieee80211_hdr
*hdr
)
2143 * We can postpone the mgd.timer whenever receiving unicast frames
2144 * from AP because we know that the connection is working both ways
2145 * at that time. But multicast frames (and hence also beacons) must
2146 * be ignored here, because we need to trigger the timer during
2147 * data idle periods for sending the periodic probe request to the
2148 * AP we're connected to.
2150 if (is_multicast_ether_addr(hdr
->addr1
))
2153 ieee80211_sta_reset_conn_monitor(sdata
);
2156 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
2158 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2159 struct ieee80211_local
*local
= sdata
->local
;
2161 mutex_lock(&local
->mtx
);
2162 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
2165 __ieee80211_stop_poll(sdata
);
2167 mutex_lock(&local
->iflist_mtx
);
2168 ieee80211_recalc_ps(local
, -1);
2169 mutex_unlock(&local
->iflist_mtx
);
2171 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
2175 * We've received a probe response, but are not sure whether
2176 * we have or will be receiving any beacons or data, so let's
2177 * schedule the timers again, just in case.
2179 ieee80211_sta_reset_beacon_monitor(sdata
);
2181 mod_timer(&ifmgd
->conn_mon_timer
,
2182 round_jiffies_up(jiffies
+
2183 IEEE80211_CONNECTION_IDLE_TIME
));
2185 mutex_unlock(&local
->mtx
);
2188 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data
*sdata
,
2189 struct ieee80211_hdr
*hdr
,
2192 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2193 u16 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
2194 int ac
= ieee80211_ac_from_tid(tid
);
2195 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
2196 unsigned long now
= jiffies
;
2198 if (likely(!tx_tspec
->admitted_time
))
2201 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
2202 tx_tspec
->consumed_tx_time
= 0;
2203 tx_tspec
->time_slice_start
= now
;
2205 if (tx_tspec
->downgraded
) {
2206 tx_tspec
->action
= TX_TSPEC_ACTION_STOP_DOWNGRADE
;
2207 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2211 if (tx_tspec
->downgraded
)
2214 tx_tspec
->consumed_tx_time
+= tx_time
;
2216 if (tx_tspec
->consumed_tx_time
>= tx_tspec
->admitted_time
) {
2217 tx_tspec
->downgraded
= true;
2218 tx_tspec
->action
= TX_TSPEC_ACTION_DOWNGRADE
;
2219 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2223 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
2224 struct ieee80211_hdr
*hdr
, bool ack
, u16 tx_time
)
2226 ieee80211_sta_tx_wmm_ac_notify(sdata
, hdr
, tx_time
);
2228 if (!ieee80211_is_data(hdr
->frame_control
))
2231 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
2232 sdata
->u
.mgd
.probe_send_count
> 0) {
2234 ieee80211_sta_reset_conn_monitor(sdata
);
2236 sdata
->u
.mgd
.nullfunc_failed
= true;
2237 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2242 ieee80211_sta_reset_conn_monitor(sdata
);
2245 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2247 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2249 u8
*dst
= ifmgd
->associated
->bssid
;
2250 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2253 * Try sending broadcast probe requests for the last three
2254 * probe requests after the first ones failed since some
2255 * buggy APs only support broadcast probe requests.
2257 if (ifmgd
->probe_send_count
>= unicast_limit
)
2261 * When the hardware reports an accurate Tx ACK status, it's
2262 * better to send a nullfunc frame instead of a probe request,
2263 * as it will kick us off the AP quickly if we aren't associated
2264 * anymore. The timeout will be reset if the frame is ACKed by
2267 ifmgd
->probe_send_count
++;
2269 if (ieee80211_hw_check(&sdata
->local
->hw
, REPORTS_TX_ACK_STATUS
)) {
2270 ifmgd
->nullfunc_failed
= false;
2271 ieee80211_send_nullfunc(sdata
->local
, sdata
, false);
2276 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2277 if (WARN_ON_ONCE(ssid
== NULL
))
2282 ieee80211_send_probe_req(sdata
, sdata
->vif
.addr
, dst
,
2283 ssid
+ 2, ssid_len
, NULL
,
2284 0, (u32
) -1, true, 0,
2285 ifmgd
->associated
->channel
, false);
2289 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2290 run_again(sdata
, ifmgd
->probe_timeout
);
2293 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2296 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2297 bool already
= false;
2299 if (!ieee80211_sdata_running(sdata
))
2304 if (!ifmgd
->associated
)
2307 mutex_lock(&sdata
->local
->mtx
);
2309 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2310 mutex_unlock(&sdata
->local
->mtx
);
2315 mlme_dbg_ratelimited(sdata
,
2316 "detected beacon loss from AP (missed %d beacons) - probing\n",
2319 ieee80211_cqm_beacon_loss_notify(&sdata
->vif
, GFP_KERNEL
);
2323 * The driver/our work has already reported this event or the
2324 * connection monitoring has kicked in and we have already sent
2325 * a probe request. Or maybe the AP died and the driver keeps
2326 * reporting until we disassociate...
2328 * In either case we have to ignore the current call to this
2329 * function (except for setting the correct probe reason bit)
2330 * because otherwise we would reset the timer every time and
2331 * never check whether we received a probe response!
2333 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
2336 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2338 mutex_unlock(&sdata
->local
->mtx
);
2343 mutex_lock(&sdata
->local
->iflist_mtx
);
2344 ieee80211_recalc_ps(sdata
->local
, -1);
2345 mutex_unlock(&sdata
->local
->iflist_mtx
);
2347 ifmgd
->probe_send_count
= 0;
2348 ieee80211_mgd_probe_ap_send(sdata
);
2350 sdata_unlock(sdata
);
2353 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2354 struct ieee80211_vif
*vif
)
2356 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2357 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2358 struct cfg80211_bss
*cbss
;
2359 struct sk_buff
*skb
;
2363 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2366 sdata_assert_lock(sdata
);
2368 if (ifmgd
->associated
)
2369 cbss
= ifmgd
->associated
;
2370 else if (ifmgd
->auth_data
)
2371 cbss
= ifmgd
->auth_data
->bss
;
2372 else if (ifmgd
->assoc_data
)
2373 cbss
= ifmgd
->assoc_data
->bss
;
2378 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2379 if (WARN_ON_ONCE(ssid
== NULL
))
2384 skb
= ieee80211_build_probe_req(sdata
, sdata
->vif
.addr
, cbss
->bssid
,
2385 (u32
) -1, cbss
->channel
,
2392 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2394 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data
*sdata
,
2395 const u8
*buf
, size_t len
, bool tx
,
2398 struct ieee80211_event event
= {
2400 .u
.mlme
.data
= tx
? DEAUTH_TX_EVENT
: DEAUTH_RX_EVENT
,
2401 .u
.mlme
.reason
= reason
,
2405 cfg80211_tx_mlme_mgmt(sdata
->dev
, buf
, len
);
2407 cfg80211_rx_mlme_mgmt(sdata
->dev
, buf
, len
);
2409 drv_event_callback(sdata
->local
, sdata
, &event
);
2412 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2414 struct ieee80211_local
*local
= sdata
->local
;
2415 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2416 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2419 if (!ifmgd
->associated
) {
2420 sdata_unlock(sdata
);
2424 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2425 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2427 mutex_lock(&local
->mtx
);
2428 sdata
->vif
.csa_active
= false;
2429 ifmgd
->csa_waiting_bcn
= false;
2430 if (sdata
->csa_block_tx
) {
2431 ieee80211_wake_vif_queues(local
, sdata
,
2432 IEEE80211_QUEUE_STOP_REASON_CSA
);
2433 sdata
->csa_block_tx
= false;
2435 mutex_unlock(&local
->mtx
);
2437 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
2438 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2440 sdata_unlock(sdata
);
2443 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2445 struct ieee80211_sub_if_data
*sdata
=
2446 container_of(work
, struct ieee80211_sub_if_data
,
2447 u
.mgd
.beacon_connection_loss_work
);
2448 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2449 struct sta_info
*sta
;
2451 if (ifmgd
->associated
) {
2453 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2455 sta
->beacon_loss_count
++;
2459 if (ifmgd
->connection_loss
) {
2460 sdata_info(sdata
, "Connection to AP %pM lost\n",
2462 __ieee80211_disconnect(sdata
);
2464 ieee80211_mgd_probe_ap(sdata
, true);
2468 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2470 struct ieee80211_sub_if_data
*sdata
=
2471 container_of(work
, struct ieee80211_sub_if_data
,
2472 u
.mgd
.csa_connection_drop_work
);
2474 __ieee80211_disconnect(sdata
);
2477 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2479 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2480 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2482 trace_api_beacon_loss(sdata
);
2484 sdata
->u
.mgd
.connection_loss
= false;
2485 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2487 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2489 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2491 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2492 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2494 trace_api_connection_loss(sdata
);
2496 sdata
->u
.mgd
.connection_loss
= true;
2497 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2499 EXPORT_SYMBOL(ieee80211_connection_loss
);
2502 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2505 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2507 sdata_assert_lock(sdata
);
2511 * we are not authenticated yet, the only timer that could be
2512 * running is the timeout for the authentication response which
2513 * which is not relevant anymore.
2515 del_timer_sync(&sdata
->u
.mgd
.timer
);
2516 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2518 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2519 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2520 sdata
->u
.mgd
.flags
= 0;
2521 mutex_lock(&sdata
->local
->mtx
);
2522 ieee80211_vif_release_channel(sdata
);
2523 mutex_unlock(&sdata
->local
->mtx
);
2526 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2528 sdata
->u
.mgd
.auth_data
= NULL
;
2531 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2534 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2536 sdata_assert_lock(sdata
);
2540 * we are not associated yet, the only timer that could be
2541 * running is the timeout for the association response which
2542 * which is not relevant anymore.
2544 del_timer_sync(&sdata
->u
.mgd
.timer
);
2545 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2547 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2548 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2549 sdata
->u
.mgd
.flags
= 0;
2550 sdata
->flags
&= ~IEEE80211_SDATA_MU_MIMO_OWNER
;
2551 mutex_lock(&sdata
->local
->mtx
);
2552 ieee80211_vif_release_channel(sdata
);
2553 mutex_unlock(&sdata
->local
->mtx
);
2557 sdata
->u
.mgd
.assoc_data
= NULL
;
2560 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2561 struct ieee80211_mgmt
*mgmt
, size_t len
)
2563 struct ieee80211_local
*local
= sdata
->local
;
2564 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2566 struct ieee802_11_elems elems
;
2569 pos
= mgmt
->u
.auth
.variable
;
2570 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2571 if (!elems
.challenge
)
2573 auth_data
->expected_transaction
= 4;
2574 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2575 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
2576 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2577 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2578 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2579 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2580 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2581 auth_data
->key
, auth_data
->key_len
,
2582 auth_data
->key_idx
, tx_flags
);
2585 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2586 struct ieee80211_mgmt
*mgmt
, size_t len
)
2588 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2590 u16 auth_alg
, auth_transaction
, status_code
;
2591 struct sta_info
*sta
;
2592 struct ieee80211_event event
= {
2594 .u
.mlme
.data
= AUTH_EVENT
,
2597 sdata_assert_lock(sdata
);
2602 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2605 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2607 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2610 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2611 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2612 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2614 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2615 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2616 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2617 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2619 ifmgd
->auth_data
->expected_transaction
);
2623 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2624 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2625 mgmt
->sa
, status_code
);
2626 ieee80211_destroy_auth_data(sdata
, false);
2627 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2628 event
.u
.mlme
.status
= MLME_DENIED
;
2629 event
.u
.mlme
.reason
= status_code
;
2630 drv_event_callback(sdata
->local
, sdata
, &event
);
2634 switch (ifmgd
->auth_data
->algorithm
) {
2635 case WLAN_AUTH_OPEN
:
2636 case WLAN_AUTH_LEAP
:
2640 case WLAN_AUTH_SHARED_KEY
:
2641 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2642 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2643 /* need another frame */
2648 WARN_ONCE(1, "invalid auth alg %d",
2649 ifmgd
->auth_data
->algorithm
);
2653 event
.u
.mlme
.status
= MLME_SUCCESS
;
2654 drv_event_callback(sdata
->local
, sdata
, &event
);
2655 sdata_info(sdata
, "authenticated\n");
2656 ifmgd
->auth_data
->done
= true;
2657 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2658 ifmgd
->auth_data
->timeout_started
= true;
2659 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2661 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2662 ifmgd
->auth_data
->expected_transaction
!= 2) {
2664 * Report auth frame to user space for processing since another
2665 * round of Authentication frames is still needed.
2667 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2671 /* move station state to auth */
2672 mutex_lock(&sdata
->local
->sta_mtx
);
2673 sta
= sta_info_get(sdata
, bssid
);
2675 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2678 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2679 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2682 mutex_unlock(&sdata
->local
->sta_mtx
);
2684 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2687 mutex_unlock(&sdata
->local
->sta_mtx
);
2688 /* ignore frame -- wait for timeout */
2691 #define case_WLAN(type) \
2692 case WLAN_REASON_##type: return #type
2694 static const char *ieee80211_get_reason_code_string(u16 reason_code
)
2696 switch (reason_code
) {
2697 case_WLAN(UNSPECIFIED
);
2698 case_WLAN(PREV_AUTH_NOT_VALID
);
2699 case_WLAN(DEAUTH_LEAVING
);
2700 case_WLAN(DISASSOC_DUE_TO_INACTIVITY
);
2701 case_WLAN(DISASSOC_AP_BUSY
);
2702 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA
);
2703 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA
);
2704 case_WLAN(DISASSOC_STA_HAS_LEFT
);
2705 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH
);
2706 case_WLAN(DISASSOC_BAD_POWER
);
2707 case_WLAN(DISASSOC_BAD_SUPP_CHAN
);
2708 case_WLAN(INVALID_IE
);
2709 case_WLAN(MIC_FAILURE
);
2710 case_WLAN(4WAY_HANDSHAKE_TIMEOUT
);
2711 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT
);
2712 case_WLAN(IE_DIFFERENT
);
2713 case_WLAN(INVALID_GROUP_CIPHER
);
2714 case_WLAN(INVALID_PAIRWISE_CIPHER
);
2715 case_WLAN(INVALID_AKMP
);
2716 case_WLAN(UNSUPP_RSN_VERSION
);
2717 case_WLAN(INVALID_RSN_IE_CAP
);
2718 case_WLAN(IEEE8021X_FAILED
);
2719 case_WLAN(CIPHER_SUITE_REJECTED
);
2720 case_WLAN(DISASSOC_UNSPECIFIED_QOS
);
2721 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH
);
2722 case_WLAN(DISASSOC_LOW_ACK
);
2723 case_WLAN(DISASSOC_QAP_EXCEED_TXOP
);
2724 case_WLAN(QSTA_LEAVE_QBSS
);
2725 case_WLAN(QSTA_NOT_USE
);
2726 case_WLAN(QSTA_REQUIRE_SETUP
);
2727 case_WLAN(QSTA_TIMEOUT
);
2728 case_WLAN(QSTA_CIPHER_NOT_SUPP
);
2729 case_WLAN(MESH_PEER_CANCELED
);
2730 case_WLAN(MESH_MAX_PEERS
);
2731 case_WLAN(MESH_CONFIG
);
2732 case_WLAN(MESH_CLOSE
);
2733 case_WLAN(MESH_MAX_RETRIES
);
2734 case_WLAN(MESH_CONFIRM_TIMEOUT
);
2735 case_WLAN(MESH_INVALID_GTK
);
2736 case_WLAN(MESH_INCONSISTENT_PARAM
);
2737 case_WLAN(MESH_INVALID_SECURITY
);
2738 case_WLAN(MESH_PATH_ERROR
);
2739 case_WLAN(MESH_PATH_NOFORWARD
);
2740 case_WLAN(MESH_PATH_DEST_UNREACHABLE
);
2741 case_WLAN(MAC_EXISTS_IN_MBSS
);
2742 case_WLAN(MESH_CHAN_REGULATORY
);
2743 case_WLAN(MESH_CHAN
);
2744 default: return "<unknown>";
2748 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2749 struct ieee80211_mgmt
*mgmt
, size_t len
)
2751 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2752 u16 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2754 sdata_assert_lock(sdata
);
2759 if (ifmgd
->associated
&&
2760 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
)) {
2761 const u8
*bssid
= ifmgd
->associated
->bssid
;
2763 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u=%s)\n",
2765 ieee80211_get_reason_code_string(reason_code
));
2767 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2769 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false,
2774 if (ifmgd
->assoc_data
&&
2775 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2776 const u8
*bssid
= ifmgd
->assoc_data
->bss
->bssid
;
2779 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2781 ieee80211_get_reason_code_string(reason_code
));
2783 ieee80211_destroy_assoc_data(sdata
, false);
2785 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2791 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2792 struct ieee80211_mgmt
*mgmt
, size_t len
)
2794 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2797 sdata_assert_lock(sdata
);
2802 if (!ifmgd
->associated
||
2803 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2806 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2808 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2809 mgmt
->sa
, reason_code
);
2811 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2813 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false, reason_code
);
2816 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2817 u8
*supp_rates
, unsigned int supp_rates_len
,
2818 u32
*rates
, u32
*basic_rates
,
2819 bool *have_higher_than_11mbit
,
2820 int *min_rate
, int *min_rate_index
,
2821 int shift
, u32 rate_flags
)
2825 for (i
= 0; i
< supp_rates_len
; i
++) {
2826 int rate
= supp_rates
[i
] & 0x7f;
2827 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2829 if ((rate
* 5 * (1 << shift
)) > 110)
2830 *have_higher_than_11mbit
= true;
2833 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2834 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2836 * Note: Even through the membership selector and the basic
2837 * rate flag share the same bit, they are not exactly
2840 if (!!(supp_rates
[i
] & 0x80) &&
2841 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2844 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2845 struct ieee80211_rate
*br
;
2848 br
= &sband
->bitrates
[j
];
2849 if ((rate_flags
& br
->flags
) != rate_flags
)
2852 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2853 if (brate
== rate
) {
2856 *basic_rates
|= BIT(j
);
2857 if ((rate
* 5) < *min_rate
) {
2858 *min_rate
= rate
* 5;
2859 *min_rate_index
= j
;
2867 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2868 struct cfg80211_bss
*cbss
,
2869 struct ieee80211_mgmt
*mgmt
, size_t len
)
2871 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2872 struct ieee80211_local
*local
= sdata
->local
;
2873 struct ieee80211_supported_band
*sband
;
2874 struct sta_info
*sta
;
2876 u16 capab_info
, aid
;
2877 struct ieee802_11_elems elems
;
2878 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2879 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2880 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2885 /* AssocResp and ReassocResp have identical structure */
2887 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2888 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2890 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2891 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2893 aid
&= ~(BIT(15) | BIT(14));
2895 ifmgd
->broken_ap
= false;
2897 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2898 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2901 ifmgd
->broken_ap
= true;
2904 pos
= mgmt
->u
.assoc_resp
.variable
;
2905 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2907 if (!elems
.supp_rates
) {
2908 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2913 ifmgd
->tdls_chan_switch_prohibited
=
2914 elems
.ext_capab
&& elems
.ext_capab_len
>= 5 &&
2915 (elems
.ext_capab
[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED
);
2918 * Some APs are erroneously not including some information in their
2919 * (re)association response frames. Try to recover by using the data
2920 * from the beacon or probe response. This seems to afflict mobile
2921 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2922 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2924 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2925 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2926 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2927 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2928 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2929 const struct cfg80211_bss_ies
*ies
;
2930 struct ieee802_11_elems bss_elems
;
2933 ies
= rcu_dereference(cbss
->ies
);
2935 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2941 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2943 if (assoc_data
->wmm
&&
2944 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2945 elems
.wmm_param
= bss_elems
.wmm_param
;
2947 "AP bug: WMM param missing from AssocResp\n");
2951 * Also check if we requested HT/VHT, otherwise the AP doesn't
2952 * have to include the IEs in the (re)association response.
2954 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2955 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2956 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2958 "AP bug: HT capability missing from AssocResp\n");
2960 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2961 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2962 elems
.ht_operation
= bss_elems
.ht_operation
;
2964 "AP bug: HT operation missing from AssocResp\n");
2966 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2967 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2968 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2970 "AP bug: VHT capa missing from AssocResp\n");
2972 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2973 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2974 elems
.vht_operation
= bss_elems
.vht_operation
;
2976 "AP bug: VHT operation missing from AssocResp\n");
2981 * We previously checked these in the beacon/probe response, so
2982 * they should be present here. This is just a safety net.
2984 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2985 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2987 "HT AP is missing WMM params or HT capability/operation\n");
2992 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2993 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2995 "VHT AP is missing VHT capability/operation\n");
3000 mutex_lock(&sdata
->local
->sta_mtx
);
3002 * station info was already allocated and inserted before
3003 * the association and should be available to us
3005 sta
= sta_info_get(sdata
, cbss
->bssid
);
3006 if (WARN_ON(!sta
)) {
3007 mutex_unlock(&sdata
->local
->sta_mtx
);
3012 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
3014 /* Set up internal HT/VHT capabilities */
3015 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
3016 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
3017 elems
.ht_cap_elem
, sta
);
3019 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
3020 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
3021 elems
.vht_cap_elem
, sta
);
3024 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3025 * in their association response, so ignore that data for our own
3026 * configuration. If it changed since the last beacon, we'll get the
3027 * next beacon and update then.
3031 * If an operating mode notification IE is present, override the
3032 * NSS calculation (that would be done in rate_control_rate_init())
3033 * and use the # of streams from that element.
3035 if (elems
.opmode_notif
&&
3036 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
3039 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
3040 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
3042 sta
->sta
.rx_nss
= nss
;
3045 rate_control_rate_init(sta
);
3047 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
3048 set_sta_flag(sta
, WLAN_STA_MFP
);
3050 sta
->sta
.wme
= elems
.wmm_param
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
;
3052 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
3053 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
3054 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
3057 "failed to move station %pM to desired state\n",
3059 WARN_ON(__sta_info_destroy(sta
));
3060 mutex_unlock(&sdata
->local
->sta_mtx
);
3065 mutex_unlock(&sdata
->local
->sta_mtx
);
3068 * Always handle WMM once after association regardless
3069 * of the first value the AP uses. Setting -1 here has
3070 * that effect because the AP values is an unsigned
3073 ifmgd
->wmm_last_param_set
= -1;
3075 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) && elems
.wmm_param
)
3076 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3077 elems
.wmm_param_len
);
3079 ieee80211_set_wmm_default(sdata
, false);
3080 changed
|= BSS_CHANGED_QOS
;
3082 /* set AID and assoc capability,
3083 * ieee80211_set_associated() will tell the driver */
3084 bss_conf
->aid
= aid
;
3085 bss_conf
->assoc_capability
= capab_info
;
3086 ieee80211_set_associated(sdata
, cbss
, changed
);
3089 * If we're using 4-addr mode, let the AP know that we're
3090 * doing so, so that it can create the STA VLAN on its side
3092 if (ifmgd
->use_4addr
)
3093 ieee80211_send_4addr_nullfunc(local
, sdata
);
3096 * Start timer to probe the connection to the AP now.
3097 * Also start the timer that will detect beacon loss.
3099 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
3100 ieee80211_sta_reset_beacon_monitor(sdata
);
3108 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
3109 struct ieee80211_mgmt
*mgmt
,
3112 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3113 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
3114 u16 capab_info
, status_code
, aid
;
3115 struct ieee802_11_elems elems
;
3116 int ac
, uapsd_queues
= -1;
3119 struct cfg80211_bss
*bss
;
3120 struct ieee80211_event event
= {
3122 .u
.mlme
.data
= ASSOC_EVENT
,
3125 sdata_assert_lock(sdata
);
3129 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
3133 * AssocResp and ReassocResp have identical structure, so process both
3134 * of them in this function.
3140 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
3141 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
3142 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
3143 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
3146 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3147 reassoc
? "Rea" : "A", mgmt
->sa
,
3148 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
3150 pos
= mgmt
->u
.assoc_resp
.variable
;
3151 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
3153 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
3154 elems
.timeout_int
&&
3155 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
3157 tu
= le32_to_cpu(elems
.timeout_int
->value
);
3158 ms
= tu
* 1024 / 1000;
3160 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3162 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
3163 assoc_data
->timeout_started
= true;
3164 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
3165 run_again(sdata
, assoc_data
->timeout
);
3169 bss
= assoc_data
->bss
;
3171 if (status_code
!= WLAN_STATUS_SUCCESS
) {
3172 sdata_info(sdata
, "%pM denied association (code=%d)\n",
3173 mgmt
->sa
, status_code
);
3174 ieee80211_destroy_assoc_data(sdata
, false);
3175 event
.u
.mlme
.status
= MLME_DENIED
;
3176 event
.u
.mlme
.reason
= status_code
;
3177 drv_event_callback(sdata
->local
, sdata
, &event
);
3179 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
3180 /* oops -- internal error -- send timeout for now */
3181 ieee80211_destroy_assoc_data(sdata
, false);
3182 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3185 event
.u
.mlme
.status
= MLME_SUCCESS
;
3186 drv_event_callback(sdata
->local
, sdata
, &event
);
3187 sdata_info(sdata
, "associated\n");
3190 * destroy assoc_data afterwards, as otherwise an idle
3191 * recalc after assoc_data is NULL but before associated
3192 * is set can cause the interface to go idle
3194 ieee80211_destroy_assoc_data(sdata
, true);
3196 /* get uapsd queues configuration */
3198 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
3199 if (sdata
->tx_conf
[ac
].uapsd
)
3200 uapsd_queues
|= BIT(ac
);
3203 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
, uapsd_queues
);
3206 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
3207 struct ieee80211_mgmt
*mgmt
, size_t len
,
3208 struct ieee80211_rx_status
*rx_status
,
3209 struct ieee802_11_elems
*elems
)
3211 struct ieee80211_local
*local
= sdata
->local
;
3212 struct ieee80211_bss
*bss
;
3213 struct ieee80211_channel
*channel
;
3215 sdata_assert_lock(sdata
);
3217 channel
= ieee80211_get_channel(local
->hw
.wiphy
, rx_status
->freq
);
3221 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
3224 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
3225 ieee80211_rx_bss_put(local
, bss
);
3230 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
3231 struct sk_buff
*skb
)
3233 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
3234 struct ieee80211_if_managed
*ifmgd
;
3235 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
3236 size_t baselen
, len
= skb
->len
;
3237 struct ieee802_11_elems elems
;
3239 ifmgd
= &sdata
->u
.mgd
;
3241 sdata_assert_lock(sdata
);
3243 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
3244 return; /* ignore ProbeResp to foreign address */
3246 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
3250 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
3253 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3255 if (ifmgd
->associated
&&
3256 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3257 ieee80211_reset_ap_probe(sdata
);
3261 * This is the canonical list of information elements we care about,
3262 * the filter code also gives us all changes to the Microsoft OUI
3263 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3264 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3265 * changes to requested client power.
3267 * We implement beacon filtering in software since that means we can
3268 * avoid processing the frame here and in cfg80211, and userspace
3269 * will not be able to tell whether the hardware supports it or not.
3271 * XXX: This list needs to be dynamic -- userspace needs to be able to
3272 * add items it requires. It also needs to be able to tell us to
3273 * look out for other vendor IEs.
3275 static const u64 care_about_ies
=
3276 (1ULL << WLAN_EID_COUNTRY
) |
3277 (1ULL << WLAN_EID_ERP_INFO
) |
3278 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
3279 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
3280 (1ULL << WLAN_EID_HT_CAPABILITY
) |
3281 (1ULL << WLAN_EID_HT_OPERATION
) |
3282 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN
);
3284 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
3285 struct ieee80211_mgmt
*mgmt
, size_t len
,
3286 struct ieee80211_rx_status
*rx_status
)
3288 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3289 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
3291 struct ieee802_11_elems elems
;
3292 struct ieee80211_local
*local
= sdata
->local
;
3293 struct ieee80211_chanctx_conf
*chanctx_conf
;
3294 struct ieee80211_channel
*chan
;
3295 struct sta_info
*sta
;
3301 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3303 sdata_assert_lock(sdata
);
3305 /* Process beacon from the current BSS */
3306 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
3311 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3312 if (!chanctx_conf
) {
3317 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
3321 chan
= chanctx_conf
->def
.chan
;
3324 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
3325 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
3326 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
3327 len
- baselen
, false, &elems
);
3329 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3330 if (elems
.tim
&& !elems
.parse_error
) {
3331 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
3332 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
3334 ifmgd
->have_beacon
= true;
3335 ifmgd
->assoc_data
->need_beacon
= false;
3336 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3337 sdata
->vif
.bss_conf
.sync_tsf
=
3338 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3339 sdata
->vif
.bss_conf
.sync_device_ts
=
3340 rx_status
->device_timestamp
;
3342 sdata
->vif
.bss_conf
.sync_dtim_count
=
3343 elems
.tim
->dtim_count
;
3345 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3347 /* continue assoc process */
3348 ifmgd
->assoc_data
->timeout
= jiffies
;
3349 ifmgd
->assoc_data
->timeout_started
= true;
3350 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3354 if (!ifmgd
->associated
||
3355 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3357 bssid
= ifmgd
->associated
->bssid
;
3359 /* Track average RSSI from the Beacon frames of the current AP */
3360 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3361 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3362 ewma_beacon_signal_init(&ifmgd
->ave_beacon_signal
);
3363 ifmgd
->last_cqm_event_signal
= 0;
3364 ifmgd
->count_beacon_signal
= 1;
3365 ifmgd
->last_ave_beacon_signal
= 0;
3367 ifmgd
->count_beacon_signal
++;
3370 ewma_beacon_signal_add(&ifmgd
->ave_beacon_signal
, -rx_status
->signal
);
3372 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3373 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3374 int sig
= -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
3375 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3376 struct ieee80211_event event
= {
3381 * if signal crosses either of the boundaries, invoke callback
3382 * with appropriate parameters
3384 if (sig
> ifmgd
->rssi_max_thold
&&
3385 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3386 ifmgd
->last_ave_beacon_signal
= sig
;
3387 event
.u
.rssi
.data
= RSSI_EVENT_HIGH
;
3388 drv_event_callback(local
, sdata
, &event
);
3389 } else if (sig
< ifmgd
->rssi_min_thold
&&
3390 (last_sig
>= ifmgd
->rssi_max_thold
||
3392 ifmgd
->last_ave_beacon_signal
= sig
;
3393 event
.u
.rssi
.data
= RSSI_EVENT_LOW
;
3394 drv_event_callback(local
, sdata
, &event
);
3398 if (bss_conf
->cqm_rssi_thold
&&
3399 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3400 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3401 int sig
= -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
3402 int last_event
= ifmgd
->last_cqm_event_signal
;
3403 int thold
= bss_conf
->cqm_rssi_thold
;
3404 int hyst
= bss_conf
->cqm_rssi_hyst
;
3407 (last_event
== 0 || sig
< last_event
- hyst
)) {
3408 ifmgd
->last_cqm_event_signal
= sig
;
3409 ieee80211_cqm_rssi_notify(
3411 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3413 } else if (sig
> thold
&&
3414 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3415 ifmgd
->last_cqm_event_signal
= sig
;
3416 ieee80211_cqm_rssi_notify(
3418 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3423 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
3424 mlme_dbg_ratelimited(sdata
,
3425 "cancelling AP probe due to a received beacon\n");
3426 ieee80211_reset_ap_probe(sdata
);
3430 * Push the beacon loss detection into the future since
3431 * we are processing a beacon from the AP just now.
3433 ieee80211_sta_reset_beacon_monitor(sdata
);
3435 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3436 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3437 len
- baselen
, false, &elems
,
3438 care_about_ies
, ncrc
);
3440 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
3441 ieee80211_check_tim(elems
.tim
, elems
.tim_len
, ifmgd
->aid
)) {
3442 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3443 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3444 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3445 ieee80211_hw_config(local
,
3446 IEEE80211_CONF_CHANGE_PS
);
3448 ieee80211_send_nullfunc(local
, sdata
, false);
3449 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3450 local
->pspolling
= true;
3453 * Here is assumed that the driver will be
3454 * able to send ps-poll frame and receive a
3455 * response even though power save mode is
3456 * enabled, but some drivers might require
3457 * to disable power save here. This needs
3458 * to be investigated.
3460 ieee80211_send_pspoll(local
, sdata
);
3464 if (sdata
->vif
.p2p
) {
3465 struct ieee80211_p2p_noa_attr noa
= {};
3468 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3470 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3471 (u8
*) &noa
, sizeof(noa
));
3473 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3474 /* valid noa_attr and index changed */
3475 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3476 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3477 changed
|= BSS_CHANGED_P2P_PS
;
3479 * make sure we update all information, the CRC
3480 * mechanism doesn't look at P2P attributes.
3482 ifmgd
->beacon_crc_valid
= false;
3484 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3485 /* noa_attr not found and we had valid noa_attr before */
3486 sdata
->u
.mgd
.p2p_noa_index
= -1;
3487 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3488 changed
|= BSS_CHANGED_P2P_PS
;
3489 ifmgd
->beacon_crc_valid
= false;
3493 if (ifmgd
->csa_waiting_bcn
)
3494 ieee80211_chswitch_post_beacon(sdata
);
3497 * Update beacon timing and dtim count on every beacon appearance. This
3498 * will allow the driver to use the most updated values. Do it before
3499 * comparing this one with last received beacon.
3500 * IMPORTANT: These parameters would possibly be out of sync by the time
3501 * the driver will use them. The synchronized view is currently
3502 * guaranteed only in certain callbacks.
3504 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3505 sdata
->vif
.bss_conf
.sync_tsf
=
3506 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3507 sdata
->vif
.bss_conf
.sync_device_ts
=
3508 rx_status
->device_timestamp
;
3510 sdata
->vif
.bss_conf
.sync_dtim_count
=
3511 elems
.tim
->dtim_count
;
3513 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3516 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3518 ifmgd
->beacon_crc
= ncrc
;
3519 ifmgd
->beacon_crc_valid
= true;
3521 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3523 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
3524 rx_status
->device_timestamp
,
3527 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
3528 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3529 elems
.wmm_param_len
))
3530 changed
|= BSS_CHANGED_QOS
;
3533 * If we haven't had a beacon before, tell the driver about the
3534 * DTIM period (and beacon timing if desired) now.
3536 if (!ifmgd
->have_beacon
) {
3537 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3539 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3541 bss_conf
->dtim_period
= 1;
3543 changed
|= BSS_CHANGED_BEACON_INFO
;
3544 ifmgd
->have_beacon
= true;
3546 mutex_lock(&local
->iflist_mtx
);
3547 ieee80211_recalc_ps(local
, -1);
3548 mutex_unlock(&local
->iflist_mtx
);
3550 ieee80211_recalc_ps_vif(sdata
);
3553 if (elems
.erp_info
) {
3555 erp_value
= elems
.erp_info
[0];
3559 changed
|= ieee80211_handle_bss_capability(sdata
,
3560 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3561 erp_valid
, erp_value
);
3563 mutex_lock(&local
->sta_mtx
);
3564 sta
= sta_info_get(sdata
, bssid
);
3566 if (ieee80211_config_bw(sdata
, sta
,
3567 elems
.ht_cap_elem
, elems
.ht_operation
,
3568 elems
.vht_operation
, bssid
, &changed
)) {
3569 mutex_unlock(&local
->sta_mtx
);
3570 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3571 WLAN_REASON_DEAUTH_LEAVING
,
3573 ieee80211_report_disconnect(sdata
, deauth_buf
,
3574 sizeof(deauth_buf
), true,
3575 WLAN_REASON_DEAUTH_LEAVING
);
3579 if (sta
&& elems
.opmode_notif
)
3580 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3581 rx_status
->band
, true);
3582 mutex_unlock(&local
->sta_mtx
);
3584 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
, mgmt
,
3586 elems
.country_elem_len
,
3587 elems
.pwr_constr_elem
,
3588 elems
.cisco_dtpc_elem
);
3590 ieee80211_bss_info_change_notify(sdata
, changed
);
3593 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3594 struct sk_buff
*skb
)
3596 struct ieee80211_rx_status
*rx_status
;
3597 struct ieee80211_mgmt
*mgmt
;
3599 struct ieee802_11_elems elems
;
3602 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3603 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3604 fc
= le16_to_cpu(mgmt
->frame_control
);
3608 switch (fc
& IEEE80211_FCTL_STYPE
) {
3609 case IEEE80211_STYPE_BEACON
:
3610 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3612 case IEEE80211_STYPE_PROBE_RESP
:
3613 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3615 case IEEE80211_STYPE_AUTH
:
3616 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3618 case IEEE80211_STYPE_DEAUTH
:
3619 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3621 case IEEE80211_STYPE_DISASSOC
:
3622 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3624 case IEEE80211_STYPE_ASSOC_RESP
:
3625 case IEEE80211_STYPE_REASSOC_RESP
:
3626 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3628 case IEEE80211_STYPE_ACTION
:
3629 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3630 ies_len
= skb
->len
-
3631 offsetof(struct ieee80211_mgmt
,
3632 u
.action
.u
.chan_switch
.variable
);
3637 ieee802_11_parse_elems(
3638 mgmt
->u
.action
.u
.chan_switch
.variable
,
3639 ies_len
, true, &elems
);
3641 if (elems
.parse_error
)
3644 ieee80211_sta_process_chanswitch(sdata
,
3646 rx_status
->device_timestamp
,
3648 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3649 ies_len
= skb
->len
-
3650 offsetof(struct ieee80211_mgmt
,
3651 u
.action
.u
.ext_chan_switch
.variable
);
3656 ieee802_11_parse_elems(
3657 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3658 ies_len
, true, &elems
);
3660 if (elems
.parse_error
)
3663 /* for the handling code pretend this was also an IE */
3664 elems
.ext_chansw_ie
=
3665 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3667 ieee80211_sta_process_chanswitch(sdata
,
3669 rx_status
->device_timestamp
,
3674 sdata_unlock(sdata
);
3677 static void ieee80211_sta_timer(unsigned long data
)
3679 struct ieee80211_sub_if_data
*sdata
=
3680 (struct ieee80211_sub_if_data
*) data
;
3682 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3685 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3686 u8
*bssid
, u8 reason
, bool tx
)
3688 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3690 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3693 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
3697 static int ieee80211_auth(struct ieee80211_sub_if_data
*sdata
)
3699 struct ieee80211_local
*local
= sdata
->local
;
3700 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3701 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3706 sdata_assert_lock(sdata
);
3708 if (WARN_ON_ONCE(!auth_data
))
3713 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3714 sdata_info(sdata
, "authentication with %pM timed out\n",
3715 auth_data
->bss
->bssid
);
3718 * Most likely AP is not in the range so remove the
3719 * bss struct for that AP.
3721 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3726 drv_mgd_prepare_tx(local
, sdata
);
3728 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3729 auth_data
->bss
->bssid
, auth_data
->tries
,
3730 IEEE80211_AUTH_MAX_TRIES
);
3732 auth_data
->expected_transaction
= 2;
3734 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3735 trans
= auth_data
->sae_trans
;
3736 status
= auth_data
->sae_status
;
3737 auth_data
->expected_transaction
= trans
;
3740 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3741 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3742 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3744 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3745 auth_data
->data
, auth_data
->data_len
,
3746 auth_data
->bss
->bssid
,
3747 auth_data
->bss
->bssid
, NULL
, 0, 0,
3750 if (tx_flags
== 0) {
3751 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3752 auth_data
->timeout_started
= true;
3753 run_again(sdata
, auth_data
->timeout
);
3755 auth_data
->timeout
=
3756 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3757 auth_data
->timeout_started
= true;
3758 run_again(sdata
, auth_data
->timeout
);
3764 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3766 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3767 struct ieee80211_local
*local
= sdata
->local
;
3769 sdata_assert_lock(sdata
);
3771 assoc_data
->tries
++;
3772 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3773 sdata_info(sdata
, "association with %pM timed out\n",
3774 assoc_data
->bss
->bssid
);
3777 * Most likely AP is not in the range so remove the
3778 * bss struct for that AP.
3780 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3785 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3786 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3787 IEEE80211_ASSOC_MAX_TRIES
);
3788 ieee80211_send_assoc(sdata
);
3790 if (!ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3791 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3792 assoc_data
->timeout_started
= true;
3793 run_again(sdata
, assoc_data
->timeout
);
3795 assoc_data
->timeout
=
3796 round_jiffies_up(jiffies
+
3797 IEEE80211_ASSOC_TIMEOUT_LONG
);
3798 assoc_data
->timeout_started
= true;
3799 run_again(sdata
, assoc_data
->timeout
);
3805 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3806 __le16 fc
, bool acked
)
3808 struct ieee80211_local
*local
= sdata
->local
;
3810 sdata
->u
.mgd
.status_fc
= fc
;
3811 sdata
->u
.mgd
.status_acked
= acked
;
3812 sdata
->u
.mgd
.status_received
= true;
3814 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3817 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3819 struct ieee80211_local
*local
= sdata
->local
;
3820 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3824 if (ifmgd
->status_received
) {
3825 __le16 fc
= ifmgd
->status_fc
;
3826 bool status_acked
= ifmgd
->status_acked
;
3828 ifmgd
->status_received
= false;
3829 if (ifmgd
->auth_data
&& ieee80211_is_auth(fc
)) {
3831 ifmgd
->auth_data
->timeout
=
3832 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3833 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3835 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3837 ifmgd
->auth_data
->timeout_started
= true;
3838 } else if (ifmgd
->assoc_data
&&
3839 (ieee80211_is_assoc_req(fc
) ||
3840 ieee80211_is_reassoc_req(fc
))) {
3842 ifmgd
->assoc_data
->timeout
=
3843 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3844 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3846 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3848 ifmgd
->assoc_data
->timeout_started
= true;
3852 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3853 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3854 if (ifmgd
->auth_data
->done
) {
3856 * ok ... we waited for assoc but userspace didn't,
3857 * so let's just kill the auth data
3859 ieee80211_destroy_auth_data(sdata
, false);
3860 } else if (ieee80211_auth(sdata
)) {
3862 struct ieee80211_event event
= {
3864 .u
.mlme
.data
= AUTH_EVENT
,
3865 .u
.mlme
.status
= MLME_TIMEOUT
,
3868 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3870 ieee80211_destroy_auth_data(sdata
, false);
3872 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3873 drv_event_callback(sdata
->local
, sdata
, &event
);
3875 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3876 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3878 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3879 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3880 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3881 ieee80211_do_assoc(sdata
)) {
3882 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3883 struct ieee80211_event event
= {
3885 .u
.mlme
.data
= ASSOC_EVENT
,
3886 .u
.mlme
.status
= MLME_TIMEOUT
,
3889 ieee80211_destroy_assoc_data(sdata
, false);
3890 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3891 drv_event_callback(sdata
->local
, sdata
, &event
);
3893 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3894 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3896 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3897 ifmgd
->associated
) {
3901 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3903 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3904 max_tries
= max_nullfunc_tries
;
3906 max_tries
= max_probe_tries
;
3908 /* ACK received for nullfunc probing frame */
3909 if (!ifmgd
->probe_send_count
)
3910 ieee80211_reset_ap_probe(sdata
);
3911 else if (ifmgd
->nullfunc_failed
) {
3912 if (ifmgd
->probe_send_count
< max_tries
) {
3914 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3915 bssid
, ifmgd
->probe_send_count
,
3917 ieee80211_mgd_probe_ap_send(sdata
);
3920 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3922 ieee80211_sta_connection_lost(sdata
, bssid
,
3923 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3926 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3927 run_again(sdata
, ifmgd
->probe_timeout
);
3928 else if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3930 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3931 bssid
, probe_wait_ms
);
3932 ieee80211_sta_connection_lost(sdata
, bssid
,
3933 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3934 } else if (ifmgd
->probe_send_count
< max_tries
) {
3936 "No probe response from AP %pM after %dms, try %d/%i\n",
3937 bssid
, probe_wait_ms
,
3938 ifmgd
->probe_send_count
, max_tries
);
3939 ieee80211_mgd_probe_ap_send(sdata
);
3942 * We actually lost the connection ... or did we?
3945 wiphy_debug(local
->hw
.wiphy
,
3946 "%s: No probe response from AP %pM"
3947 " after %dms, disconnecting.\n",
3949 bssid
, probe_wait_ms
);
3951 ieee80211_sta_connection_lost(sdata
, bssid
,
3952 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3956 sdata_unlock(sdata
);
3959 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3961 struct ieee80211_sub_if_data
*sdata
=
3962 (struct ieee80211_sub_if_data
*) data
;
3963 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3965 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3968 sdata
->u
.mgd
.connection_loss
= false;
3969 ieee80211_queue_work(&sdata
->local
->hw
,
3970 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3973 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3975 struct ieee80211_sub_if_data
*sdata
=
3976 (struct ieee80211_sub_if_data
*) data
;
3977 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3978 struct ieee80211_local
*local
= sdata
->local
;
3980 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3983 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3986 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3988 struct ieee80211_sub_if_data
*sdata
=
3989 container_of(work
, struct ieee80211_sub_if_data
,
3990 u
.mgd
.monitor_work
);
3992 ieee80211_mgd_probe_ap(sdata
, false);
3995 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3997 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3998 __ieee80211_stop_poll(sdata
);
4000 /* let's probe the connection once */
4001 if (!ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
4002 ieee80211_queue_work(&sdata
->local
->hw
,
4003 &sdata
->u
.mgd
.monitor_work
);
4004 /* and do all the other regular work too */
4005 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
4010 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data
*sdata
)
4012 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4013 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4017 if (ifmgd
->auth_data
|| ifmgd
->assoc_data
) {
4018 const u8
*bssid
= ifmgd
->auth_data
?
4019 ifmgd
->auth_data
->bss
->bssid
:
4020 ifmgd
->assoc_data
->bss
->bssid
;
4023 * If we are trying to authenticate / associate while suspending,
4024 * cfg80211 won't know and won't actually abort those attempts,
4025 * thus we need to do that ourselves.
4027 ieee80211_send_deauth_disassoc(sdata
, bssid
,
4028 IEEE80211_STYPE_DEAUTH
,
4029 WLAN_REASON_DEAUTH_LEAVING
,
4031 if (ifmgd
->assoc_data
)
4032 ieee80211_destroy_assoc_data(sdata
, false);
4033 if (ifmgd
->auth_data
)
4034 ieee80211_destroy_auth_data(sdata
, false);
4035 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4036 IEEE80211_DEAUTH_FRAME_LEN
);
4039 /* This is a bit of a hack - we should find a better and more generic
4040 * solution to this. Normally when suspending, cfg80211 will in fact
4041 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4042 * auth (not so important) or assoc (this is the problem) process.
4044 * As a consequence, it can happen that we are in the process of both
4045 * associating and suspending, and receive an association response
4046 * after cfg80211 has checked if it needs to disconnect, but before
4047 * we actually set the flag to drop incoming frames. This will then
4048 * cause the workqueue flush to process the association response in
4049 * the suspend, resulting in a successful association just before it
4050 * tries to remove the interface from the driver, which now though
4051 * has a channel context assigned ... this results in issues.
4053 * To work around this (for now) simply deauth here again if we're
4056 if (ifmgd
->associated
&& !sdata
->local
->wowlan
) {
4058 struct cfg80211_deauth_request req
= {
4059 .reason_code
= WLAN_REASON_DEAUTH_LEAVING
,
4063 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
4064 ieee80211_mgd_deauth(sdata
, &req
);
4067 sdata_unlock(sdata
);
4070 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
4072 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4075 if (!ifmgd
->associated
) {
4076 sdata_unlock(sdata
);
4080 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
4081 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
4082 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
4083 ieee80211_sta_connection_lost(sdata
,
4084 ifmgd
->associated
->bssid
,
4085 WLAN_REASON_UNSPECIFIED
,
4087 sdata_unlock(sdata
);
4090 sdata_unlock(sdata
);
4094 /* interface setup */
4095 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
4097 struct ieee80211_if_managed
*ifmgd
;
4099 ifmgd
= &sdata
->u
.mgd
;
4100 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
4101 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
4102 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
4103 ieee80211_beacon_connection_loss_work
);
4104 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
4105 ieee80211_csa_connection_drop_work
);
4106 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
4107 INIT_DELAYED_WORK(&ifmgd
->tdls_peer_del_work
,
4108 ieee80211_tdls_peer_del_work
);
4109 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
4110 (unsigned long) sdata
);
4111 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
4112 (unsigned long) sdata
);
4113 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
4114 (unsigned long) sdata
);
4115 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
4116 (unsigned long) sdata
);
4117 INIT_DELAYED_WORK(&ifmgd
->tx_tspec_wk
,
4118 ieee80211_sta_handle_tspec_ac_params_wk
);
4121 ifmgd
->powersave
= sdata
->wdev
.ps
;
4122 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
4123 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
4124 ifmgd
->p2p_noa_index
= -1;
4126 if (sdata
->local
->hw
.wiphy
->features
& NL80211_FEATURE_DYNAMIC_SMPS
)
4127 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
4129 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
4131 /* Setup TDLS data */
4132 spin_lock_init(&ifmgd
->teardown_lock
);
4133 ifmgd
->teardown_skb
= NULL
;
4134 ifmgd
->orig_teardown_skb
= NULL
;
4137 /* scan finished notification */
4138 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
4140 struct ieee80211_sub_if_data
*sdata
;
4142 /* Restart STA timers */
4144 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4145 if (ieee80211_sdata_running(sdata
))
4146 ieee80211_restart_sta_timer(sdata
);
4151 int ieee80211_max_network_latency(struct notifier_block
*nb
,
4152 unsigned long data
, void *dummy
)
4154 s32 latency_usec
= (s32
) data
;
4155 struct ieee80211_local
*local
=
4156 container_of(nb
, struct ieee80211_local
,
4157 network_latency_notifier
);
4159 mutex_lock(&local
->iflist_mtx
);
4160 ieee80211_recalc_ps(local
, latency_usec
);
4161 mutex_unlock(&local
->iflist_mtx
);
4166 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
4167 struct cfg80211_bss
*cbss
)
4169 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4170 const u8
*ht_cap_ie
, *vht_cap_ie
;
4171 const struct ieee80211_ht_cap
*ht_cap
;
4172 const struct ieee80211_vht_cap
*vht_cap
;
4175 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
4178 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4179 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
4180 ht_cap
= (void *)(ht_cap_ie
+ 2);
4181 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
4183 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4184 * "Tx Unequal Modulation Supported" fields.
4188 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
4191 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4192 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
4196 vht_cap
= (void *)(vht_cap_ie
+ 2);
4197 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
4198 for (nss
= 8; nss
> 0; nss
--) {
4199 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
4200 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
4203 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4204 chains
= max(chains
, nss
);
4210 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
4211 struct cfg80211_bss
*cbss
)
4213 struct ieee80211_local
*local
= sdata
->local
;
4214 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4215 const struct ieee80211_ht_cap
*ht_cap
= NULL
;
4216 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
4217 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
4218 struct ieee80211_supported_band
*sband
;
4219 struct cfg80211_chan_def chandef
;
4224 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4226 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
4227 IEEE80211_STA_DISABLE_80P80MHZ
|
4228 IEEE80211_STA_DISABLE_160MHZ
);
4232 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
4233 sband
->ht_cap
.ht_supported
) {
4234 const u8
*ht_oper_ie
, *ht_cap_ie
;
4236 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
4237 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
4238 ht_oper
= (void *)(ht_oper_ie
+ 2);
4240 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4241 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
))
4242 ht_cap
= (void *)(ht_cap_ie
+ 2);
4245 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4250 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4251 sband
->vht_cap
.vht_supported
) {
4252 const u8
*vht_oper_ie
, *vht_cap
;
4254 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
4255 WLAN_EID_VHT_OPERATION
);
4256 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
4257 vht_oper
= (void *)(vht_oper_ie
+ 2);
4258 if (vht_oper
&& !ht_oper
) {
4261 "AP advertised VHT without HT, disabling both\n");
4262 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4263 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4266 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4267 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
4268 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4273 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4275 for (i
= 0; i
< sband
->n_channels
; i
++) {
4276 if (sband
->channels
[i
].flags
& (IEEE80211_CHAN_DISABLED
|
4277 IEEE80211_CHAN_NO_80MHZ
))
4285 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4287 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
4289 ht_cap
, ht_oper
, vht_oper
,
4292 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
4297 /* will change later if needed */
4298 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4300 mutex_lock(&local
->mtx
);
4302 * If this fails (possibly due to channel context sharing
4303 * on incompatible channels, e.g. 80+80 and 160 sharing the
4304 * same control channel) try to use a smaller bandwidth.
4306 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4307 IEEE80211_CHANCTX_SHARED
);
4309 /* don't downgrade for 5 and 10 MHz channels, though. */
4310 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
4311 chandef
.width
== NL80211_CHAN_WIDTH_10
)
4314 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
4315 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
4316 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4317 IEEE80211_CHANCTX_SHARED
);
4320 mutex_unlock(&local
->mtx
);
4324 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
4325 struct cfg80211_bss
*cbss
, bool assoc
,
4328 struct ieee80211_local
*local
= sdata
->local
;
4329 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4330 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
4331 struct sta_info
*new_sta
= NULL
;
4332 struct ieee80211_supported_band
*sband
;
4333 bool have_sta
= false;
4336 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4338 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
4343 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
4348 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
4353 if (new_sta
|| override
) {
4354 err
= ieee80211_prep_channel(sdata
, cbss
);
4357 sta_info_free(local
, new_sta
);
4363 u32 rates
= 0, basic_rates
= 0;
4364 bool have_higher_than_11mbit
;
4365 int min_rate
= INT_MAX
, min_rate_index
= -1;
4366 struct ieee80211_chanctx_conf
*chanctx_conf
;
4367 const struct cfg80211_bss_ies
*ies
;
4368 int shift
= ieee80211_vif_get_shift(&sdata
->vif
);
4372 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4373 if (WARN_ON(!chanctx_conf
)) {
4375 sta_info_free(local
, new_sta
);
4378 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
4381 ieee80211_get_rates(sband
, bss
->supp_rates
,
4382 bss
->supp_rates_len
,
4383 &rates
, &basic_rates
,
4384 &have_higher_than_11mbit
,
4385 &min_rate
, &min_rate_index
,
4389 * This used to be a workaround for basic rates missing
4390 * in the association response frame. Now that we no
4391 * longer use the basic rates from there, it probably
4392 * doesn't happen any more, but keep the workaround so
4393 * in case some *other* APs are buggy in different ways
4394 * we can connect -- with a warning.
4396 if (!basic_rates
&& min_rate_index
>= 0) {
4398 "No basic rates, using min rate instead\n");
4399 basic_rates
= BIT(min_rate_index
);
4402 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
4403 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
4405 /* cf. IEEE 802.11 9.2.12 */
4406 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
4407 have_higher_than_11mbit
)
4408 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
4410 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
4412 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
4414 /* set timing information */
4415 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
4417 ies
= rcu_dereference(cbss
->beacon_ies
);
4421 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4422 sdata
->vif
.bss_conf
.sync_device_ts
=
4423 bss
->device_ts_beacon
;
4424 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4425 ies
->data
, ies
->len
);
4426 if (tim_ie
&& tim_ie
[1] >= 2)
4427 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
4429 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4430 } else if (!ieee80211_hw_check(&sdata
->local
->hw
,
4431 TIMING_BEACON_ONLY
)) {
4432 ies
= rcu_dereference(cbss
->proberesp_ies
);
4433 /* must be non-NULL since beacon IEs were NULL */
4434 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4435 sdata
->vif
.bss_conf
.sync_device_ts
=
4436 bss
->device_ts_presp
;
4437 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4439 sdata
->vif
.bss_conf
.sync_tsf
= 0;
4440 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
4441 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4445 /* tell driver about BSSID, basic rates and timing */
4446 ieee80211_bss_info_change_notify(sdata
,
4447 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
4448 BSS_CHANGED_BEACON_INT
);
4451 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
4453 err
= sta_info_insert(new_sta
);
4457 "failed to insert STA entry for the AP (error %d)\n",
4462 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4464 /* Cancel scan to ensure that nothing interferes with connection */
4465 if (local
->scanning
)
4466 ieee80211_scan_cancel(local
);
4472 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4473 struct cfg80211_auth_request
*req
)
4475 struct ieee80211_local
*local
= sdata
->local
;
4476 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4477 struct ieee80211_mgd_auth_data
*auth_data
;
4481 /* prepare auth data structure */
4483 switch (req
->auth_type
) {
4484 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4485 auth_alg
= WLAN_AUTH_OPEN
;
4487 case NL80211_AUTHTYPE_SHARED_KEY
:
4488 if (IS_ERR(local
->wep_tx_tfm
))
4490 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4492 case NL80211_AUTHTYPE_FT
:
4493 auth_alg
= WLAN_AUTH_FT
;
4495 case NL80211_AUTHTYPE_NETWORK_EAP
:
4496 auth_alg
= WLAN_AUTH_LEAP
;
4498 case NL80211_AUTHTYPE_SAE
:
4499 auth_alg
= WLAN_AUTH_SAE
;
4505 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4506 req
->ie_len
, GFP_KERNEL
);
4510 auth_data
->bss
= req
->bss
;
4512 if (req
->sae_data_len
>= 4) {
4513 __le16
*pos
= (__le16
*) req
->sae_data
;
4514 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4515 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4516 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4517 req
->sae_data_len
- 4);
4518 auth_data
->data_len
+= req
->sae_data_len
- 4;
4521 if (req
->ie
&& req
->ie_len
) {
4522 memcpy(&auth_data
->data
[auth_data
->data_len
],
4523 req
->ie
, req
->ie_len
);
4524 auth_data
->data_len
+= req
->ie_len
;
4527 if (req
->key
&& req
->key_len
) {
4528 auth_data
->key_len
= req
->key_len
;
4529 auth_data
->key_idx
= req
->key_idx
;
4530 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4533 auth_data
->algorithm
= auth_alg
;
4535 /* try to authenticate/probe */
4537 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4538 ifmgd
->assoc_data
) {
4543 if (ifmgd
->auth_data
)
4544 ieee80211_destroy_auth_data(sdata
, false);
4546 /* prep auth_data so we don't go into idle on disassoc */
4547 ifmgd
->auth_data
= auth_data
;
4549 if (ifmgd
->associated
) {
4550 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4552 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4553 WLAN_REASON_UNSPECIFIED
,
4556 ieee80211_report_disconnect(sdata
, frame_buf
,
4557 sizeof(frame_buf
), true,
4558 WLAN_REASON_UNSPECIFIED
);
4561 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4563 err
= ieee80211_prep_connection(sdata
, req
->bss
, false, false);
4567 err
= ieee80211_auth(sdata
);
4569 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4573 /* hold our own reference */
4574 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4578 eth_zero_addr(ifmgd
->bssid
);
4579 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4580 ifmgd
->auth_data
= NULL
;
4581 mutex_lock(&sdata
->local
->mtx
);
4582 ieee80211_vif_release_channel(sdata
);
4583 mutex_unlock(&sdata
->local
->mtx
);
4589 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data
*sdata
,
4590 const u8
*wmm_param
, int len
)
4598 if (wmm_param
[5] != 1 /* version */)
4601 pos
= wmm_param
+ 8;
4604 for (; left
>= 4; left
-= 4, pos
+= 4) {
4605 u8 aifsn
= pos
[0] & 0x0f;
4606 u8 ecwmin
= pos
[1] & 0x0f;
4607 u8 ecwmax
= (pos
[1] & 0xf0) >> 4;
4608 int aci
= (pos
[0] >> 5) & 0x03;
4612 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4616 if (ecwmin
> ecwmax
) {
4618 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4619 ecwmin
, ecwmax
, aci
);
4627 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4628 struct cfg80211_assoc_request
*req
)
4630 struct ieee80211_local
*local
= sdata
->local
;
4631 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4632 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4633 struct ieee80211_mgd_assoc_data
*assoc_data
;
4634 const struct cfg80211_bss_ies
*beacon_ies
;
4635 struct ieee80211_supported_band
*sband
;
4636 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4638 bool override
= false;
4640 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4645 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4651 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4652 assoc_data
->ssid_len
= ssidie
[1];
4655 if (ifmgd
->associated
) {
4656 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4658 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4659 WLAN_REASON_UNSPECIFIED
,
4662 ieee80211_report_disconnect(sdata
, frame_buf
,
4663 sizeof(frame_buf
), true,
4664 WLAN_REASON_UNSPECIFIED
);
4667 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4672 if (ifmgd
->assoc_data
) {
4677 if (ifmgd
->auth_data
) {
4680 /* keep sta info, bssid if matching */
4681 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4682 ieee80211_destroy_auth_data(sdata
, match
);
4685 /* prepare assoc data */
4687 ifmgd
->beacon_crc_valid
= false;
4689 assoc_data
->wmm
= bss
->wmm_used
&&
4690 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4691 if (assoc_data
->wmm
) {
4692 /* try to check validity of WMM params IE */
4693 const struct cfg80211_bss_ies
*ies
;
4694 const u8
*wp
, *start
, *end
;
4697 ies
= rcu_dereference(req
->bss
->ies
);
4699 end
= start
+ ies
->len
;
4702 wp
= cfg80211_find_vendor_ie(
4704 WLAN_OUI_TYPE_MICROSOFT_WMM
,
4705 start
, end
- start
);
4708 start
= wp
+ wp
[1] + 2;
4709 /* if this IE is too short, try the next */
4712 /* if this IE is WMM params, we found what we wanted */
4717 if (!wp
|| !ieee80211_usable_wmm_params(sdata
, wp
+ 2,
4719 assoc_data
->wmm
= false;
4720 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
4726 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4727 * We still associate in non-HT mode (11a/b/g) if any one of these
4728 * ciphers is configured as pairwise.
4729 * We can set this to true for non-11n hardware, that'll be checked
4730 * separately along with the peer capabilities.
4732 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4733 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4734 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4735 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4736 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4737 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4738 netdev_info(sdata
->dev
,
4739 "disabling HT/VHT due to WEP/TKIP use\n");
4743 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4744 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4745 if (!sband
->ht_cap
.ht_supported
||
4746 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4747 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4748 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4749 if (!bss
->wmm_used
&&
4750 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4751 netdev_info(sdata
->dev
,
4752 "disabling HT as WMM/QoS is not supported by the AP\n");
4755 /* disable VHT if we don't support it or the AP doesn't use WMM */
4756 if (!sband
->vht_cap
.vht_supported
||
4757 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4758 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4759 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4760 if (!bss
->wmm_used
&&
4761 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4762 netdev_info(sdata
->dev
,
4763 "disabling VHT as WMM/QoS is not supported by the AP\n");
4766 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4767 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4768 sizeof(ifmgd
->ht_capa_mask
));
4770 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4771 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4772 sizeof(ifmgd
->vht_capa_mask
));
4774 if (req
->ie
&& req
->ie_len
) {
4775 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4776 assoc_data
->ie_len
= req
->ie_len
;
4779 assoc_data
->bss
= req
->bss
;
4781 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4782 if (ifmgd
->powersave
)
4783 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4785 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4787 sdata
->smps_mode
= ifmgd
->req_smps
;
4789 assoc_data
->capability
= req
->bss
->capability
;
4790 assoc_data
->supp_rates
= bss
->supp_rates
;
4791 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4794 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4795 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4796 assoc_data
->ap_ht_param
=
4797 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4799 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4800 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4801 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4802 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4803 sizeof(struct ieee80211_vht_cap
));
4805 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4808 if (WARN((sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
) &&
4809 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
),
4810 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4811 sdata
->vif
.driver_flags
&= ~IEEE80211_VIF_SUPPORTS_UAPSD
;
4813 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4814 (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
)) {
4815 assoc_data
->uapsd
= true;
4816 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4818 assoc_data
->uapsd
= false;
4819 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4822 if (req
->prev_bssid
)
4823 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4826 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4827 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4829 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4830 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4833 if (req
->flags
& ASSOC_REQ_USE_RRM
)
4834 ifmgd
->flags
|= IEEE80211_STA_ENABLE_RRM
;
4836 ifmgd
->flags
&= ~IEEE80211_STA_ENABLE_RRM
;
4838 if (req
->crypto
.control_port
)
4839 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4841 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4843 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4844 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4845 sdata
->encrypt_headroom
= ieee80211_cs_headroom(local
, &req
->crypto
,
4848 /* kick off associate process */
4850 ifmgd
->assoc_data
= assoc_data
;
4851 ifmgd
->dtim_period
= 0;
4852 ifmgd
->have_beacon
= false;
4854 /* override HT/VHT configuration only if the AP and we support it */
4855 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
4856 struct ieee80211_sta_ht_cap sta_ht_cap
;
4858 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
4861 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
4862 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
4864 /* check for 40 MHz disable override */
4865 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
) &&
4866 sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
4867 !(sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
4870 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4871 req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4875 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4876 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4877 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4880 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4881 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4883 err
= ieee80211_prep_connection(sdata
, req
->bss
, true, override
);
4888 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4890 if (ieee80211_hw_check(&sdata
->local
->hw
, NEED_DTIM_BEFORE_ASSOC
) &&
4893 * Wait up to one beacon interval ...
4894 * should this be more if we miss one?
4896 sdata_info(sdata
, "waiting for beacon from %pM\n",
4898 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4899 assoc_data
->timeout_started
= true;
4900 assoc_data
->need_beacon
= true;
4901 } else if (beacon_ies
) {
4902 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4907 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4908 const struct ieee80211_tim_ie
*tim
;
4909 tim
= (void *)(tim_ie
+ 2);
4910 ifmgd
->dtim_period
= tim
->dtim_period
;
4911 dtim_count
= tim
->dtim_count
;
4913 ifmgd
->have_beacon
= true;
4914 assoc_data
->timeout
= jiffies
;
4915 assoc_data
->timeout_started
= true;
4917 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
4918 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4919 sdata
->vif
.bss_conf
.sync_device_ts
=
4920 bss
->device_ts_beacon
;
4921 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4924 assoc_data
->timeout
= jiffies
;
4925 assoc_data
->timeout_started
= true;
4929 run_again(sdata
, assoc_data
->timeout
);
4931 if (bss
->corrupt_data
) {
4932 char *corrupt_type
= "data";
4933 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4934 if (bss
->corrupt_data
&
4935 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4936 corrupt_type
= "beacon and probe response";
4938 corrupt_type
= "beacon";
4939 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4940 corrupt_type
= "probe response";
4941 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4947 eth_zero_addr(ifmgd
->bssid
);
4948 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4949 ifmgd
->assoc_data
= NULL
;
4955 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4956 struct cfg80211_deauth_request
*req
)
4958 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4959 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4960 bool tx
= !req
->local_state_change
;
4962 if (ifmgd
->auth_data
&&
4963 ether_addr_equal(ifmgd
->auth_data
->bss
->bssid
, req
->bssid
)) {
4965 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4966 req
->bssid
, req
->reason_code
,
4967 ieee80211_get_reason_code_string(req
->reason_code
));
4969 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4970 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4971 IEEE80211_STYPE_DEAUTH
,
4972 req
->reason_code
, tx
,
4974 ieee80211_destroy_auth_data(sdata
, false);
4975 ieee80211_report_disconnect(sdata
, frame_buf
,
4976 sizeof(frame_buf
), true,
4982 if (ifmgd
->associated
&&
4983 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4985 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4986 req
->bssid
, req
->reason_code
,
4987 ieee80211_get_reason_code_string(req
->reason_code
));
4989 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4990 req
->reason_code
, tx
, frame_buf
);
4991 ieee80211_report_disconnect(sdata
, frame_buf
,
4992 sizeof(frame_buf
), true,
5000 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
5001 struct cfg80211_disassoc_request
*req
)
5003 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
5005 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
5008 * cfg80211 should catch this ... but it's racy since
5009 * we can receive a disassoc frame, process it, hand it
5010 * to cfg80211 while that's in a locked section already
5011 * trying to tell us that the user wants to disconnect.
5013 if (ifmgd
->associated
!= req
->bss
)
5017 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5018 req
->bss
->bssid
, req
->reason_code
, ieee80211_get_reason_code_string(req
->reason_code
));
5020 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
5021 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
5022 req
->reason_code
, !req
->local_state_change
,
5025 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
5031 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
5033 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
5036 * Make sure some work items will not run after this,
5037 * they will not do anything but might not have been
5038 * cancelled when disconnecting.
5040 cancel_work_sync(&ifmgd
->monitor_work
);
5041 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
5042 cancel_work_sync(&ifmgd
->request_smps_work
);
5043 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
5044 cancel_work_sync(&ifmgd
->chswitch_work
);
5045 cancel_delayed_work_sync(&ifmgd
->tdls_peer_del_work
);
5048 if (ifmgd
->assoc_data
) {
5049 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
5050 ieee80211_destroy_assoc_data(sdata
, false);
5051 cfg80211_assoc_timeout(sdata
->dev
, bss
);
5053 if (ifmgd
->auth_data
)
5054 ieee80211_destroy_auth_data(sdata
, false);
5055 spin_lock_bh(&ifmgd
->teardown_lock
);
5056 if (ifmgd
->teardown_skb
) {
5057 kfree_skb(ifmgd
->teardown_skb
);
5058 ifmgd
->teardown_skb
= NULL
;
5059 ifmgd
->orig_teardown_skb
= NULL
;
5061 spin_unlock_bh(&ifmgd
->teardown_lock
);
5062 del_timer_sync(&ifmgd
->timer
);
5063 sdata_unlock(sdata
);
5066 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
5067 enum nl80211_cqm_rssi_threshold_event rssi_event
,
5070 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
5072 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
5074 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
5076 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
5078 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif
*vif
, gfp_t gfp
)
5080 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
5082 trace_api_cqm_beacon_loss_notify(sdata
->local
, sdata
);
5084 cfg80211_cqm_beacon_loss_notify(sdata
->dev
, gfp
);
5086 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify
);