2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 Intel Deutschland GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
44 static int max_nullfunc_tries
= 2;
45 module_param(max_nullfunc_tries
, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries
,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49 static int max_probe_tries
= 5;
50 module_param(max_probe_tries
, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries
,
52 "Maximum probe tries before disconnecting (reason 4).");
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
62 static int beacon_loss_count
= 7;
63 module_param(beacon_loss_count
, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count
,
65 "Number of beacon intervals before we decide beacon was lost.");
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
77 static int probe_wait_ms
= 500;
78 module_param(probe_wait_ms
, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms
,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
84 * How many Beacon frames need to have been used in average signal strength
85 * before starting to indicate signal change events.
87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90 * We can have multiple work items (and connection probing)
91 * scheduling this timer, but we need to take care to only
92 * reschedule it when it should fire _earlier_ than it was
93 * asked for before, or if it's not pending right now. This
94 * function ensures that. Note that it then is required to
95 * run this function for all timeouts after the first one
96 * has happened -- the work that runs from this timer will
99 static void run_again(struct ieee80211_sub_if_data
*sdata
,
100 unsigned long timeout
)
102 sdata_assert_lock(sdata
);
104 if (!timer_pending(&sdata
->u
.mgd
.timer
) ||
105 time_before(timeout
, sdata
->u
.mgd
.timer
.expires
))
106 mod_timer(&sdata
->u
.mgd
.timer
, timeout
);
109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
111 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
114 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
117 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
118 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
123 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
125 if (unlikely(!sdata
->u
.mgd
.associated
))
128 ifmgd
->probe_send_count
= 0;
130 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
133 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
134 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
137 static int ecw2cw(int ecw
)
139 return (1 << ecw
) - 1;
143 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
144 struct ieee80211_supported_band
*sband
,
145 struct ieee80211_channel
*channel
,
146 const struct ieee80211_ht_cap
*ht_cap
,
147 const struct ieee80211_ht_operation
*ht_oper
,
148 const struct ieee80211_vht_operation
*vht_oper
,
149 struct cfg80211_chan_def
*chandef
, bool tracking
)
151 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
152 struct cfg80211_chan_def vht_chandef
;
153 struct ieee80211_sta_ht_cap sta_ht_cap
;
156 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
157 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
159 chandef
->chan
= channel
;
160 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
161 chandef
->center_freq1
= channel
->center_freq
;
162 chandef
->center_freq2
= 0;
164 if (!ht_cap
|| !ht_oper
|| !sta_ht_cap
.ht_supported
) {
165 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
169 chandef
->width
= NL80211_CHAN_WIDTH_20
;
171 if (!(ht_cap
->cap_info
&
172 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
))) {
173 ret
= IEEE80211_STA_DISABLE_40MHZ
;
174 vht_chandef
= *chandef
;
178 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
180 /* check that channel matches the right operating channel */
181 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
183 * It's possible that some APs are confused here;
184 * Netgear WNDR3700 sometimes reports 4 higher than
185 * the actual channel in association responses, but
186 * since we look at probe response/beacon data here
190 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
191 channel
->center_freq
, ht_cfreq
,
192 ht_oper
->primary_chan
, channel
->band
);
193 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
197 /* check 40 MHz support, if we have it */
198 if (sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
199 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
200 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
201 chandef
->width
= NL80211_CHAN_WIDTH_40
;
202 chandef
->center_freq1
+= 10;
204 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
205 chandef
->width
= NL80211_CHAN_WIDTH_40
;
206 chandef
->center_freq1
-= 10;
210 /* 40 MHz (and 80 MHz) must be supported for VHT */
211 ret
= IEEE80211_STA_DISABLE_VHT
;
212 /* also mark 40 MHz disabled */
213 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
217 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
218 ret
= IEEE80211_STA_DISABLE_VHT
;
222 vht_chandef
.chan
= channel
;
223 vht_chandef
.center_freq1
=
224 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
226 vht_chandef
.center_freq2
= 0;
228 switch (vht_oper
->chan_width
) {
229 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
230 vht_chandef
.width
= chandef
->width
;
231 vht_chandef
.center_freq1
= chandef
->center_freq1
;
233 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
234 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
236 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
237 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
239 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
240 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
241 vht_chandef
.center_freq2
=
242 ieee80211_channel_to_frequency(
243 vht_oper
->center_freq_seg2_idx
,
247 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
249 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
250 vht_oper
->chan_width
);
251 ret
= IEEE80211_STA_DISABLE_VHT
;
255 if (!cfg80211_chandef_valid(&vht_chandef
)) {
256 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
258 "AP VHT information is invalid, disable VHT\n");
259 ret
= IEEE80211_STA_DISABLE_VHT
;
263 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
268 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
269 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
271 "AP VHT information doesn't match HT, disable VHT\n");
272 ret
= IEEE80211_STA_DISABLE_VHT
;
276 *chandef
= vht_chandef
;
282 * When tracking the current AP, don't do any further checks if the
283 * new chandef is identical to the one we're currently using for the
284 * connection. This keeps us from playing ping-pong with regulatory,
285 * without it the following can happen (for example):
286 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
287 * - AP advertises regdom US
288 * - CRDA loads regdom US with 80 MHz prohibited (old database)
289 * - the code below detects an unsupported channel, downgrades, and
290 * we disconnect from the AP in the caller
291 * - disconnect causes CRDA to reload world regdomain and the game
293 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
295 * It seems possible that there are still scenarios with CSA or real
296 * bandwidth changes where a this could happen, but those cases are
297 * less common and wouldn't completely prevent using the AP.
300 cfg80211_chandef_identical(chandef
, &sdata
->vif
.bss_conf
.chandef
))
303 /* don't print the message below for VHT mismatch if VHT is disabled */
304 if (ret
& IEEE80211_STA_DISABLE_VHT
)
305 vht_chandef
= *chandef
;
308 * Ignore the DISABLED flag when we're already connected and only
309 * tracking the APs beacon for bandwidth changes - otherwise we
310 * might get disconnected here if we connect to an AP, update our
311 * regulatory information based on the AP's country IE and the
312 * information we have is wrong/outdated and disables the channel
313 * that we're actually using for the connection to the AP.
315 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
317 IEEE80211_CHAN_DISABLED
)) {
318 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
319 ret
= IEEE80211_STA_DISABLE_HT
|
320 IEEE80211_STA_DISABLE_VHT
;
324 ret
|= ieee80211_chandef_downgrade(chandef
);
327 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
329 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
331 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
335 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
336 struct sta_info
*sta
,
337 const struct ieee80211_ht_cap
*ht_cap
,
338 const struct ieee80211_ht_operation
*ht_oper
,
339 const struct ieee80211_vht_operation
*vht_oper
,
340 const u8
*bssid
, u32
*changed
)
342 struct ieee80211_local
*local
= sdata
->local
;
343 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
344 struct ieee80211_supported_band
*sband
;
345 struct ieee80211_channel
*chan
;
346 struct cfg80211_chan_def chandef
;
349 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
352 /* if HT was/is disabled, don't track any bandwidth changes */
353 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
356 /* don't check VHT if we associated as non-VHT station */
357 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
360 if (WARN_ON_ONCE(!sta
))
364 * if bss configuration changed store the new one -
365 * this may be applicable even if channel is identical
367 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
368 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
369 *changed
|= BSS_CHANGED_HT
;
370 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
373 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
374 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
376 /* calculate new channel (type) based on HT/VHT operation IEs */
377 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
,
378 ht_cap
, ht_oper
, vht_oper
,
382 * Downgrade the new channel if we associated with restricted
383 * capabilities. For example, if we associated as a 20 MHz STA
384 * to a 40 MHz AP (due to regulatory, capabilities or config
385 * reasons) then switching to a 40 MHz channel now won't do us
386 * any good -- we couldn't use it with the AP.
388 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
389 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
390 flags
|= ieee80211_chandef_downgrade(&chandef
);
391 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
392 chandef
.width
== NL80211_CHAN_WIDTH_160
)
393 flags
|= ieee80211_chandef_downgrade(&chandef
);
394 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
395 chandef
.width
> NL80211_CHAN_WIDTH_20
)
396 flags
|= ieee80211_chandef_downgrade(&chandef
);
398 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
402 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
403 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
404 chandef
.center_freq1
, chandef
.center_freq2
);
406 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
407 IEEE80211_STA_DISABLE_VHT
|
408 IEEE80211_STA_DISABLE_40MHZ
|
409 IEEE80211_STA_DISABLE_80P80MHZ
|
410 IEEE80211_STA_DISABLE_160MHZ
)) ||
411 !cfg80211_chandef_valid(&chandef
)) {
413 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
418 switch (chandef
.width
) {
419 case NL80211_CHAN_WIDTH_20_NOHT
:
420 case NL80211_CHAN_WIDTH_20
:
421 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
423 case NL80211_CHAN_WIDTH_40
:
424 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
426 case NL80211_CHAN_WIDTH_80
:
427 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
429 case NL80211_CHAN_WIDTH_80P80
:
430 case NL80211_CHAN_WIDTH_160
:
431 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
437 if (new_sta_bw
> sta
->cur_max_bandwidth
)
438 new_sta_bw
= sta
->cur_max_bandwidth
;
440 if (new_sta_bw
< sta
->sta
.bandwidth
) {
441 sta
->sta
.bandwidth
= new_sta_bw
;
442 rate_control_rate_update(local
, sband
, sta
,
443 IEEE80211_RC_BW_CHANGED
);
446 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
449 "AP %pM changed bandwidth to incompatible one - disconnect\n",
454 if (new_sta_bw
> sta
->sta
.bandwidth
) {
455 sta
->sta
.bandwidth
= new_sta_bw
;
456 rate_control_rate_update(local
, sband
, sta
,
457 IEEE80211_RC_BW_CHANGED
);
463 /* frame sending functions */
465 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
466 struct sk_buff
*skb
, u8 ap_ht_param
,
467 struct ieee80211_supported_band
*sband
,
468 struct ieee80211_channel
*channel
,
469 enum ieee80211_smps_mode smps
)
472 u32 flags
= channel
->flags
;
474 struct ieee80211_sta_ht_cap ht_cap
;
476 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
478 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
479 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
481 /* determine capability flags */
484 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
485 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
486 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
487 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
488 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
491 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
492 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
493 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
494 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
500 * If 40 MHz was disabled associate as though we weren't
501 * capable of 40 MHz -- some broken APs will never fall
502 * back to trying to transmit in 20 MHz.
504 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
505 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
506 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
509 /* set SM PS mode properly */
510 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
512 case IEEE80211_SMPS_AUTOMATIC
:
513 case IEEE80211_SMPS_NUM_MODES
:
515 case IEEE80211_SMPS_OFF
:
516 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
517 IEEE80211_HT_CAP_SM_PS_SHIFT
;
519 case IEEE80211_SMPS_STATIC
:
520 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
521 IEEE80211_HT_CAP_SM_PS_SHIFT
;
523 case IEEE80211_SMPS_DYNAMIC
:
524 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
525 IEEE80211_HT_CAP_SM_PS_SHIFT
;
529 /* reserve and fill IE */
530 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
531 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
534 /* This function determines vht capability flags for the association
536 * Note - the function may set the owner of the MU-MIMO capability
538 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
540 struct ieee80211_supported_band
*sband
,
541 struct ieee80211_vht_cap
*ap_vht_cap
)
543 struct ieee80211_local
*local
= sdata
->local
;
546 struct ieee80211_sta_vht_cap vht_cap
;
547 u32 mask
, ap_bf_sts
, our_bf_sts
;
549 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
551 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
552 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
554 /* determine capability flags */
557 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
558 u32 bw
= cap
& IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
560 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
561 if (bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
||
562 bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
)
563 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
566 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
567 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
568 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
572 * Some APs apparently get confused if our capabilities are better
573 * than theirs, so restrict what we advertise in the assoc request.
575 if (!(ap_vht_cap
->vht_cap_info
&
576 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
577 cap
&= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
578 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
);
579 else if (!(ap_vht_cap
->vht_cap_info
&
580 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE
)))
581 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
584 * If some other vif is using the MU-MIMO capablity we cannot associate
585 * using MU-MIMO - this will lead to contradictions in the group-id
587 * Ownership is defined since association request, in order to avoid
588 * simultaneous associations with MU-MIMO.
590 if (cap
& IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
) {
591 bool disable_mu_mimo
= false;
592 struct ieee80211_sub_if_data
*other
;
594 list_for_each_entry_rcu(other
, &local
->interfaces
, list
) {
595 if (other
->flags
& IEEE80211_SDATA_MU_MIMO_OWNER
) {
596 disable_mu_mimo
= true;
601 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
603 sdata
->flags
|= IEEE80211_SDATA_MU_MIMO_OWNER
;
606 mask
= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK
;
608 ap_bf_sts
= le32_to_cpu(ap_vht_cap
->vht_cap_info
) & mask
;
609 our_bf_sts
= cap
& mask
;
611 if (ap_bf_sts
< our_bf_sts
) {
616 /* reserve and fill IE */
617 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
618 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
621 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
623 struct ieee80211_local
*local
= sdata
->local
;
624 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
625 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
627 struct ieee80211_mgmt
*mgmt
;
629 size_t offset
= 0, noffset
;
630 int i
, count
, rates_len
, supp_rates_len
, shift
;
632 struct ieee80211_supported_band
*sband
;
633 struct ieee80211_chanctx_conf
*chanctx_conf
;
634 struct ieee80211_channel
*chan
;
635 u32 rate_flags
, rates
= 0;
637 sdata_assert_lock(sdata
);
640 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
641 if (WARN_ON(!chanctx_conf
)) {
645 chan
= chanctx_conf
->def
.chan
;
646 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
648 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
649 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
651 if (assoc_data
->supp_rates_len
) {
653 * Get all rates supported by the device and the AP as
654 * some APs don't like getting a superset of their rates
655 * in the association request (e.g. D-Link DAP 1353 in
658 rates_len
= ieee80211_parse_bitrates(&chanctx_conf
->def
, sband
,
659 assoc_data
->supp_rates
,
660 assoc_data
->supp_rates_len
,
664 * In case AP not provide any supported rates information
665 * before association, we send information element(s) with
666 * all rates that we support.
669 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
670 if ((rate_flags
& sband
->bitrates
[i
].flags
)
678 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
679 sizeof(*mgmt
) + /* bit too much but doesn't matter */
680 2 + assoc_data
->ssid_len
+ /* SSID */
681 4 + rates_len
+ /* (extended) rates */
682 4 + /* power capability */
683 2 + 2 * sband
->n_channels
+ /* supported channels */
684 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
685 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
686 assoc_data
->ie_len
+ /* extra IEs */
692 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
694 capab
= WLAN_CAPABILITY_ESS
;
696 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
697 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
698 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
701 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
702 capab
|= WLAN_CAPABILITY_PRIVACY
;
704 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
705 ieee80211_hw_check(&local
->hw
, SPECTRUM_MGMT
))
706 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
708 if (ifmgd
->flags
& IEEE80211_STA_ENABLE_RRM
)
709 capab
|= WLAN_CAPABILITY_RADIO_MEASURE
;
711 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
713 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
714 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
715 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
717 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
719 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
720 IEEE80211_STYPE_REASSOC_REQ
);
721 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
722 mgmt
->u
.reassoc_req
.listen_interval
=
723 cpu_to_le16(local
->hw
.conf
.listen_interval
);
724 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
728 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
729 IEEE80211_STYPE_ASSOC_REQ
);
730 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
731 mgmt
->u
.assoc_req
.listen_interval
=
732 cpu_to_le16(local
->hw
.conf
.listen_interval
);
736 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
737 *pos
++ = WLAN_EID_SSID
;
738 *pos
++ = assoc_data
->ssid_len
;
739 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
741 /* add all rates which were marked to be used above */
742 supp_rates_len
= rates_len
;
743 if (supp_rates_len
> 8)
746 pos
= skb_put(skb
, supp_rates_len
+ 2);
747 *pos
++ = WLAN_EID_SUPP_RATES
;
748 *pos
++ = supp_rates_len
;
751 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
752 if (BIT(i
) & rates
) {
753 int rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
761 if (rates_len
> count
) {
762 pos
= skb_put(skb
, rates_len
- count
+ 2);
763 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
764 *pos
++ = rates_len
- count
;
766 for (i
++; i
< sband
->n_bitrates
; i
++) {
767 if (BIT(i
) & rates
) {
769 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
776 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
||
777 capab
& WLAN_CAPABILITY_RADIO_MEASURE
) {
778 pos
= skb_put(skb
, 4);
779 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
781 *pos
++ = 0; /* min tx power */
783 *pos
++ = ieee80211_chandef_max_power(&chanctx_conf
->def
);
786 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
787 /* TODO: get this in reg domain format */
788 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
789 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
790 *pos
++ = 2 * sband
->n_channels
;
791 for (i
= 0; i
< sband
->n_channels
; i
++) {
792 *pos
++ = ieee80211_frequency_to_channel(
793 sband
->channels
[i
].center_freq
);
794 *pos
++ = 1; /* one channel in the subband*/
798 /* if present, add any custom IEs that go before HT */
799 if (assoc_data
->ie_len
) {
800 static const u8 before_ht
[] = {
803 WLAN_EID_EXT_SUPP_RATES
,
804 WLAN_EID_PWR_CAPABILITY
,
805 WLAN_EID_SUPPORTED_CHANNELS
,
808 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
809 WLAN_EID_MOBILITY_DOMAIN
,
810 WLAN_EID_FAST_BSS_TRANSITION
, /* reassoc only */
811 WLAN_EID_RIC_DATA
, /* reassoc only */
812 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
814 static const u8 after_ric
[] = {
815 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
816 WLAN_EID_HT_CAPABILITY
,
817 WLAN_EID_BSS_COEX_2040
,
818 WLAN_EID_EXT_CAPABILITY
,
819 WLAN_EID_QOS_TRAFFIC_CAPA
,
820 WLAN_EID_TIM_BCAST_REQ
,
821 WLAN_EID_INTERWORKING
,
822 /* 60GHz doesn't happen right now */
823 WLAN_EID_VHT_CAPABILITY
,
824 WLAN_EID_OPMODE_NOTIF
,
827 noffset
= ieee80211_ie_split_ric(assoc_data
->ie
,
830 ARRAY_SIZE(before_ht
),
832 ARRAY_SIZE(after_ric
),
834 pos
= skb_put(skb
, noffset
- offset
);
835 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
839 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
840 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
841 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
843 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
844 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
845 sband
, chan
, sdata
->smps_mode
);
847 /* if present, add any custom IEs that go before VHT */
848 if (assoc_data
->ie_len
) {
849 static const u8 before_vht
[] = {
852 WLAN_EID_EXT_SUPP_RATES
,
853 WLAN_EID_PWR_CAPABILITY
,
854 WLAN_EID_SUPPORTED_CHANNELS
,
857 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
858 WLAN_EID_MOBILITY_DOMAIN
,
859 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
860 WLAN_EID_HT_CAPABILITY
,
861 WLAN_EID_BSS_COEX_2040
,
862 WLAN_EID_EXT_CAPABILITY
,
863 WLAN_EID_QOS_TRAFFIC_CAPA
,
864 WLAN_EID_TIM_BCAST_REQ
,
865 WLAN_EID_INTERWORKING
,
868 /* RIC already taken above, so no need to handle here anymore */
869 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
870 before_vht
, ARRAY_SIZE(before_vht
),
872 pos
= skb_put(skb
, noffset
- offset
);
873 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
877 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
878 ieee80211_add_vht_ie(sdata
, skb
, sband
,
879 &assoc_data
->ap_vht_cap
);
881 /* if present, add any custom non-vendor IEs that go after HT */
882 if (assoc_data
->ie_len
) {
883 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
886 pos
= skb_put(skb
, noffset
- offset
);
887 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
891 if (assoc_data
->wmm
) {
892 if (assoc_data
->uapsd
) {
893 qos_info
= ifmgd
->uapsd_queues
;
894 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
895 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
900 pos
= ieee80211_add_wmm_info_ie(skb_put(skb
, 9), qos_info
);
903 /* add any remaining custom (i.e. vendor specific here) IEs */
904 if (assoc_data
->ie_len
) {
905 noffset
= assoc_data
->ie_len
;
906 pos
= skb_put(skb
, noffset
- offset
);
907 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
910 drv_mgd_prepare_tx(local
, sdata
);
912 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
913 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
914 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
915 IEEE80211_TX_INTFL_MLME_CONN_TX
;
916 ieee80211_tx_skb(sdata
, skb
);
919 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
920 struct ieee80211_sub_if_data
*sdata
)
922 struct ieee80211_pspoll
*pspoll
;
925 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
929 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
930 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
932 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
933 ieee80211_tx_skb(sdata
, skb
);
936 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
937 struct ieee80211_sub_if_data
*sdata
,
941 struct ieee80211_hdr_3addr
*nullfunc
;
942 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
944 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
948 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
950 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
952 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
953 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
955 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
956 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
958 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
959 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
961 ieee80211_tx_skb(sdata
, skb
);
964 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
965 struct ieee80211_sub_if_data
*sdata
)
968 struct ieee80211_hdr
*nullfunc
;
971 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
974 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
978 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
980 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
981 memset(nullfunc
, 0, 30);
982 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
983 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
984 nullfunc
->frame_control
= fc
;
985 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
986 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
987 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
988 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
990 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
991 ieee80211_tx_skb(sdata
, skb
);
994 /* spectrum management related things */
995 static void ieee80211_chswitch_work(struct work_struct
*work
)
997 struct ieee80211_sub_if_data
*sdata
=
998 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
999 struct ieee80211_local
*local
= sdata
->local
;
1000 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1003 if (!ieee80211_sdata_running(sdata
))
1007 mutex_lock(&local
->mtx
);
1008 mutex_lock(&local
->chanctx_mtx
);
1010 if (!ifmgd
->associated
)
1013 if (!sdata
->vif
.csa_active
)
1017 * using reservation isn't immediate as it may be deferred until later
1018 * with multi-vif. once reservation is complete it will re-schedule the
1019 * work with no reserved_chanctx so verify chandef to check if it
1020 * completed successfully
1023 if (sdata
->reserved_chanctx
) {
1025 * with multi-vif csa driver may call ieee80211_csa_finish()
1026 * many times while waiting for other interfaces to use their
1029 if (sdata
->reserved_ready
)
1032 ret
= ieee80211_vif_use_reserved_context(sdata
);
1035 "failed to use reserved channel context, disconnecting (err=%d)\n",
1037 ieee80211_queue_work(&sdata
->local
->hw
,
1038 &ifmgd
->csa_connection_drop_work
);
1045 if (!cfg80211_chandef_identical(&sdata
->vif
.bss_conf
.chandef
,
1046 &sdata
->csa_chandef
)) {
1048 "failed to finalize channel switch, disconnecting\n");
1049 ieee80211_queue_work(&sdata
->local
->hw
,
1050 &ifmgd
->csa_connection_drop_work
);
1054 /* XXX: shouldn't really modify cfg80211-owned data! */
1055 ifmgd
->associated
->channel
= sdata
->csa_chandef
.chan
;
1057 ifmgd
->csa_waiting_bcn
= true;
1059 ieee80211_sta_reset_beacon_monitor(sdata
);
1060 ieee80211_sta_reset_conn_monitor(sdata
);
1063 mutex_unlock(&local
->chanctx_mtx
);
1064 mutex_unlock(&local
->mtx
);
1065 sdata_unlock(sdata
);
1068 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data
*sdata
)
1070 struct ieee80211_local
*local
= sdata
->local
;
1071 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1074 sdata_assert_lock(sdata
);
1076 WARN_ON(!sdata
->vif
.csa_active
);
1078 if (sdata
->csa_block_tx
) {
1079 ieee80211_wake_vif_queues(local
, sdata
,
1080 IEEE80211_QUEUE_STOP_REASON_CSA
);
1081 sdata
->csa_block_tx
= false;
1084 sdata
->vif
.csa_active
= false;
1085 ifmgd
->csa_waiting_bcn
= false;
1087 ret
= drv_post_channel_switch(sdata
);
1090 "driver post channel switch failed, disconnecting\n");
1091 ieee80211_queue_work(&local
->hw
,
1092 &ifmgd
->csa_connection_drop_work
);
1096 cfg80211_ch_switch_notify(sdata
->dev
, &sdata
->reserved_chandef
);
1099 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
1101 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1102 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1104 trace_api_chswitch_done(sdata
, success
);
1107 "driver channel switch failed, disconnecting\n");
1108 ieee80211_queue_work(&sdata
->local
->hw
,
1109 &ifmgd
->csa_connection_drop_work
);
1111 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1114 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1116 static void ieee80211_chswitch_timer(unsigned long data
)
1118 struct ieee80211_sub_if_data
*sdata
=
1119 (struct ieee80211_sub_if_data
*) data
;
1121 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1125 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1126 u64 timestamp
, u32 device_timestamp
,
1127 struct ieee802_11_elems
*elems
,
1130 struct ieee80211_local
*local
= sdata
->local
;
1131 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1132 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1133 struct ieee80211_chanctx_conf
*conf
;
1134 struct ieee80211_chanctx
*chanctx
;
1135 enum ieee80211_band current_band
;
1136 struct ieee80211_csa_ie csa_ie
;
1137 struct ieee80211_channel_switch ch_switch
;
1140 sdata_assert_lock(sdata
);
1145 if (local
->scanning
)
1148 /* disregard subsequent announcements if we are already processing */
1149 if (sdata
->vif
.csa_active
)
1152 current_band
= cbss
->channel
->band
;
1153 memset(&csa_ie
, 0, sizeof(csa_ie
));
1154 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, current_band
,
1156 ifmgd
->associated
->bssid
, &csa_ie
);
1158 ieee80211_queue_work(&local
->hw
,
1159 &ifmgd
->csa_connection_drop_work
);
1163 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
1164 IEEE80211_CHAN_DISABLED
)) {
1166 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1167 ifmgd
->associated
->bssid
,
1168 csa_ie
.chandef
.chan
->center_freq
,
1169 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
1170 csa_ie
.chandef
.center_freq2
);
1171 ieee80211_queue_work(&local
->hw
,
1172 &ifmgd
->csa_connection_drop_work
);
1176 if (cfg80211_chandef_identical(&csa_ie
.chandef
,
1177 &sdata
->vif
.bss_conf
.chandef
)) {
1178 if (ifmgd
->csa_ignored_same_chan
)
1181 "AP %pM tries to chanswitch to same channel, ignore\n",
1182 ifmgd
->associated
->bssid
);
1183 ifmgd
->csa_ignored_same_chan
= true;
1188 * Drop all TDLS peers - either we disconnect or move to a different
1189 * channel from this point on. There's no telling what our peer will do.
1190 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1191 * have an incompatible wider chandef.
1193 ieee80211_teardown_tdls_peers(sdata
);
1195 mutex_lock(&local
->mtx
);
1196 mutex_lock(&local
->chanctx_mtx
);
1197 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1198 lockdep_is_held(&local
->chanctx_mtx
));
1201 "no channel context assigned to vif?, disconnecting\n");
1202 goto drop_connection
;
1205 chanctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1207 if (local
->use_chanctx
&&
1208 !ieee80211_hw_check(&local
->hw
, CHANCTX_STA_CSA
)) {
1210 "driver doesn't support chan-switch with channel contexts\n");
1211 goto drop_connection
;
1214 ch_switch
.timestamp
= timestamp
;
1215 ch_switch
.device_timestamp
= device_timestamp
;
1216 ch_switch
.block_tx
= csa_ie
.mode
;
1217 ch_switch
.chandef
= csa_ie
.chandef
;
1218 ch_switch
.count
= csa_ie
.count
;
1220 if (drv_pre_channel_switch(sdata
, &ch_switch
)) {
1222 "preparing for channel switch failed, disconnecting\n");
1223 goto drop_connection
;
1226 res
= ieee80211_vif_reserve_chanctx(sdata
, &csa_ie
.chandef
,
1227 chanctx
->mode
, false);
1230 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1232 goto drop_connection
;
1234 mutex_unlock(&local
->chanctx_mtx
);
1236 sdata
->vif
.csa_active
= true;
1237 sdata
->csa_chandef
= csa_ie
.chandef
;
1238 sdata
->csa_block_tx
= csa_ie
.mode
;
1239 ifmgd
->csa_ignored_same_chan
= false;
1241 if (sdata
->csa_block_tx
)
1242 ieee80211_stop_vif_queues(local
, sdata
,
1243 IEEE80211_QUEUE_STOP_REASON_CSA
);
1244 mutex_unlock(&local
->mtx
);
1246 cfg80211_ch_switch_started_notify(sdata
->dev
, &csa_ie
.chandef
,
1249 if (local
->ops
->channel_switch
) {
1250 /* use driver's channel switch callback */
1251 drv_channel_switch(local
, sdata
, &ch_switch
);
1255 /* channel switch handled in software */
1256 if (csa_ie
.count
<= 1)
1257 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1259 mod_timer(&ifmgd
->chswitch_timer
,
1260 TU_TO_EXP_TIME((csa_ie
.count
- 1) *
1261 cbss
->beacon_interval
));
1264 ieee80211_queue_work(&local
->hw
, &ifmgd
->csa_connection_drop_work
);
1265 mutex_unlock(&local
->chanctx_mtx
);
1266 mutex_unlock(&local
->mtx
);
1270 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1271 struct ieee80211_channel
*channel
,
1272 const u8
*country_ie
, u8 country_ie_len
,
1273 const u8
*pwr_constr_elem
,
1274 int *chan_pwr
, int *pwr_reduction
)
1276 struct ieee80211_country_ie_triplet
*triplet
;
1277 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1278 int i
, chan_increment
;
1279 bool have_chan_pwr
= false;
1282 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1285 triplet
= (void *)(country_ie
+ 3);
1286 country_ie_len
-= 3;
1288 switch (channel
->band
) {
1292 case IEEE80211_BAND_2GHZ
:
1293 case IEEE80211_BAND_60GHZ
:
1296 case IEEE80211_BAND_5GHZ
:
1302 while (country_ie_len
>= 3) {
1303 u8 first_channel
= triplet
->chans
.first_channel
;
1305 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1308 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1309 if (first_channel
+ i
* chan_increment
== chan
) {
1310 have_chan_pwr
= true;
1311 *chan_pwr
= triplet
->chans
.max_power
;
1320 country_ie_len
-= 3;
1323 if (have_chan_pwr
&& pwr_constr_elem
)
1324 *pwr_reduction
= *pwr_constr_elem
;
1328 return have_chan_pwr
;
1331 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data
*sdata
,
1332 struct ieee80211_channel
*channel
,
1333 const u8
*cisco_dtpc_ie
,
1336 /* From practical testing, the first data byte of the DTPC element
1337 * seems to contain the requested dBm level, and the CLI on Cisco
1338 * APs clearly state the range is -127 to 127 dBm, which indicates
1339 * a signed byte, although it seemingly never actually goes negative.
1340 * The other byte seems to always be zero.
1342 *pwr_level
= (__s8
)cisco_dtpc_ie
[4];
1345 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1346 struct ieee80211_channel
*channel
,
1347 struct ieee80211_mgmt
*mgmt
,
1348 const u8
*country_ie
, u8 country_ie_len
,
1349 const u8
*pwr_constr_ie
,
1350 const u8
*cisco_dtpc_ie
)
1352 bool has_80211h_pwr
= false, has_cisco_pwr
= false;
1353 int chan_pwr
= 0, pwr_reduction_80211h
= 0;
1354 int pwr_level_cisco
, pwr_level_80211h
;
1356 __le16 capab
= mgmt
->u
.probe_resp
.capab_info
;
1359 (capab
& cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
) ||
1360 capab
& cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE
))) {
1361 has_80211h_pwr
= ieee80211_find_80211h_pwr_constr(
1362 sdata
, channel
, country_ie
, country_ie_len
,
1363 pwr_constr_ie
, &chan_pwr
, &pwr_reduction_80211h
);
1365 max_t(int, 0, chan_pwr
- pwr_reduction_80211h
);
1368 if (cisco_dtpc_ie
) {
1369 ieee80211_find_cisco_dtpc(
1370 sdata
, channel
, cisco_dtpc_ie
, &pwr_level_cisco
);
1371 has_cisco_pwr
= true;
1374 if (!has_80211h_pwr
&& !has_cisco_pwr
)
1377 /* If we have both 802.11h and Cisco DTPC, apply both limits
1378 * by picking the smallest of the two power levels advertised.
1380 if (has_80211h_pwr
&&
1381 (!has_cisco_pwr
|| pwr_level_80211h
<= pwr_level_cisco
)) {
1383 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1384 pwr_level_80211h
, chan_pwr
, pwr_reduction_80211h
,
1385 sdata
->u
.mgd
.bssid
);
1386 new_ap_level
= pwr_level_80211h
;
1387 } else { /* has_cisco_pwr is always true here. */
1389 "Limiting TX power to %d dBm as advertised by %pM\n",
1390 pwr_level_cisco
, sdata
->u
.mgd
.bssid
);
1391 new_ap_level
= pwr_level_cisco
;
1394 if (sdata
->ap_power_level
== new_ap_level
)
1397 sdata
->ap_power_level
= new_ap_level
;
1398 if (__ieee80211_recalc_txpower(sdata
))
1399 return BSS_CHANGED_TXPOWER
;
1404 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1405 struct ieee80211_sub_if_data
*sdata
)
1407 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1410 * If we are scanning right now then the parameters will
1411 * take effect when scan finishes.
1413 if (local
->scanning
)
1416 if (conf
->dynamic_ps_timeout
> 0 &&
1417 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
)) {
1418 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1419 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1421 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
))
1422 ieee80211_send_nullfunc(local
, sdata
, true);
1424 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1425 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
1428 conf
->flags
|= IEEE80211_CONF_PS
;
1429 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1433 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1435 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1437 if (local
->ps_sdata
) {
1438 ieee80211_enable_ps(local
, local
->ps_sdata
);
1439 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1440 conf
->flags
&= ~IEEE80211_CONF_PS
;
1441 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1442 del_timer_sync(&local
->dynamic_ps_timer
);
1443 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1447 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1449 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1450 struct sta_info
*sta
= NULL
;
1451 bool authorized
= false;
1453 if (!mgd
->powersave
)
1459 if (!mgd
->associated
)
1462 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1465 if (!mgd
->have_beacon
)
1469 sta
= sta_info_get(sdata
, mgd
->bssid
);
1471 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1477 /* need to hold RTNL or interface lock */
1478 void ieee80211_recalc_ps(struct ieee80211_local
*local
)
1480 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1484 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
)) {
1485 local
->ps_sdata
= NULL
;
1489 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1490 if (!ieee80211_sdata_running(sdata
))
1492 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1493 /* If an AP vif is found, then disable PS
1494 * by setting the count to zero thereby setting
1500 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1506 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1507 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1510 beaconint_us
= ieee80211_tu_to_usec(
1511 found
->vif
.bss_conf
.beacon_int
);
1513 timeout
= local
->dynamic_ps_forced_timeout
;
1516 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1518 /* If the TIM IE is invalid, pretend the value is 1 */
1522 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1523 local
->ps_sdata
= found
;
1525 local
->ps_sdata
= NULL
;
1528 ieee80211_change_ps(local
);
1531 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1533 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1535 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1536 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1537 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1541 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1543 struct ieee80211_local
*local
=
1544 container_of(work
, struct ieee80211_local
,
1545 dynamic_ps_disable_work
);
1547 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1548 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1549 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1552 ieee80211_wake_queues_by_reason(&local
->hw
,
1553 IEEE80211_MAX_QUEUE_MAP
,
1554 IEEE80211_QUEUE_STOP_REASON_PS
,
1558 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1560 struct ieee80211_local
*local
=
1561 container_of(work
, struct ieee80211_local
,
1562 dynamic_ps_enable_work
);
1563 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1564 struct ieee80211_if_managed
*ifmgd
;
1565 unsigned long flags
;
1568 /* can only happen when PS was just disabled anyway */
1572 ifmgd
= &sdata
->u
.mgd
;
1574 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1577 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1578 /* don't enter PS if TX frames are pending */
1579 if (drv_tx_frames_pending(local
)) {
1580 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1582 local
->hw
.conf
.dynamic_ps_timeout
));
1587 * transmission can be stopped by others which leads to
1588 * dynamic_ps_timer expiry. Postpone the ps timer if it
1589 * is not the actual idle state.
1591 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1592 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1593 if (local
->queue_stop_reasons
[q
]) {
1594 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1596 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1598 local
->hw
.conf
.dynamic_ps_timeout
));
1602 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1605 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1606 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1607 if (drv_tx_frames_pending(local
)) {
1608 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1610 local
->hw
.conf
.dynamic_ps_timeout
));
1612 ieee80211_send_nullfunc(local
, sdata
, true);
1613 /* Flush to get the tx status of nullfunc frame */
1614 ieee80211_flush_queues(local
, sdata
, false);
1618 if (!(ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
) &&
1619 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
)) ||
1620 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1621 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1622 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1623 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1627 void ieee80211_dynamic_ps_timer(unsigned long data
)
1629 struct ieee80211_local
*local
= (void *) data
;
1631 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1634 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1636 struct delayed_work
*delayed_work
=
1637 container_of(work
, struct delayed_work
, work
);
1638 struct ieee80211_sub_if_data
*sdata
=
1639 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1640 dfs_cac_timer_work
);
1641 struct cfg80211_chan_def chandef
= sdata
->vif
.bss_conf
.chandef
;
1643 mutex_lock(&sdata
->local
->mtx
);
1644 if (sdata
->wdev
.cac_started
) {
1645 ieee80211_vif_release_channel(sdata
);
1646 cfg80211_cac_event(sdata
->dev
, &chandef
,
1647 NL80211_RADAR_CAC_FINISHED
,
1650 mutex_unlock(&sdata
->local
->mtx
);
1654 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1656 struct ieee80211_local
*local
= sdata
->local
;
1657 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1661 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1664 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1665 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
1667 unsigned long now
= jiffies
;
1669 if (tx_tspec
->action
== TX_TSPEC_ACTION_NONE
&&
1670 tx_tspec
->admitted_time
&&
1671 time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1672 tx_tspec
->consumed_tx_time
= 0;
1673 tx_tspec
->time_slice_start
= now
;
1675 if (tx_tspec
->downgraded
)
1677 TX_TSPEC_ACTION_STOP_DOWNGRADE
;
1680 switch (tx_tspec
->action
) {
1681 case TX_TSPEC_ACTION_STOP_DOWNGRADE
:
1682 /* take the original parameters */
1683 if (drv_conf_tx(local
, sdata
, ac
, &sdata
->tx_conf
[ac
]))
1685 "failed to set TX queue parameters for queue %d\n",
1687 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1688 tx_tspec
->downgraded
= false;
1691 case TX_TSPEC_ACTION_DOWNGRADE
:
1692 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1693 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1697 /* downgrade next lower non-ACM AC */
1698 for (non_acm_ac
= ac
+ 1;
1699 non_acm_ac
< IEEE80211_NUM_ACS
;
1701 if (!(sdata
->wmm_acm
& BIT(7 - 2 * non_acm_ac
)))
1703 /* The loop will result in using BK even if it requires
1704 * admission control, such configuration makes no sense
1705 * and we have to transmit somehow - the AC selection
1706 * does the same thing.
1708 if (drv_conf_tx(local
, sdata
, ac
,
1709 &sdata
->tx_conf
[non_acm_ac
]))
1711 "failed to set TX queue parameters for queue %d\n",
1713 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1715 schedule_delayed_work(&ifmgd
->tx_tspec_wk
,
1716 tx_tspec
->time_slice_start
+ HZ
- now
+ 1);
1718 case TX_TSPEC_ACTION_NONE
:
1727 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1729 if (__ieee80211_sta_handle_tspec_ac_params(sdata
))
1730 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
1733 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct
*work
)
1735 struct ieee80211_sub_if_data
*sdata
;
1737 sdata
= container_of(work
, struct ieee80211_sub_if_data
,
1738 u
.mgd
.tx_tspec_wk
.work
);
1739 ieee80211_sta_handle_tspec_ac_params(sdata
);
1743 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1744 struct ieee80211_sub_if_data
*sdata
,
1745 const u8
*wmm_param
, size_t wmm_param_len
)
1747 struct ieee80211_tx_queue_params params
[IEEE80211_NUM_ACS
];
1748 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1752 u8 uapsd_queues
= 0;
1754 if (!local
->ops
->conf_tx
)
1757 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1763 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1766 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1767 uapsd_queues
= ifmgd
->uapsd_queues
;
1769 count
= wmm_param
[6] & 0x0f;
1770 if (count
== ifmgd
->wmm_last_param_set
)
1772 ifmgd
->wmm_last_param_set
= count
;
1774 pos
= wmm_param
+ 8;
1775 left
= wmm_param_len
- 8;
1777 memset(¶ms
, 0, sizeof(params
));
1780 for (; left
>= 4; left
-= 4, pos
+= 4) {
1781 int aci
= (pos
[0] >> 5) & 0x03;
1782 int acm
= (pos
[0] >> 4) & 0x01;
1787 ac
= IEEE80211_AC_BK
;
1789 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1790 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1794 ac
= IEEE80211_AC_VI
;
1796 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1797 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1801 ac
= IEEE80211_AC_VO
;
1803 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1804 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1809 ac
= IEEE80211_AC_BE
;
1811 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1812 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1817 params
[ac
].aifs
= pos
[0] & 0x0f;
1819 if (params
[ac
].aifs
< 2) {
1821 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1822 params
[ac
].aifs
, aci
);
1823 params
[ac
].aifs
= 2;
1825 params
[ac
].cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1826 params
[ac
].cw_min
= ecw2cw(pos
[1] & 0x0f);
1827 params
[ac
].txop
= get_unaligned_le16(pos
+ 2);
1828 params
[ac
].acm
= acm
;
1829 params
[ac
].uapsd
= uapsd
;
1831 if (params
[ac
].cw_min
> params
[ac
].cw_max
) {
1833 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1834 params
[ac
].cw_min
, params
[ac
].cw_max
, aci
);
1839 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1841 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1843 params
[ac
].aifs
, params
[ac
].cw_min
, params
[ac
].cw_max
,
1844 params
[ac
].txop
, params
[ac
].uapsd
,
1845 ifmgd
->tx_tspec
[ac
].downgraded
);
1846 sdata
->tx_conf
[ac
] = params
[ac
];
1847 if (!ifmgd
->tx_tspec
[ac
].downgraded
&&
1848 drv_conf_tx(local
, sdata
, ac
, ¶ms
[ac
]))
1850 "failed to set TX queue parameters for AC %d\n",
1854 /* enable WMM or activate new settings */
1855 sdata
->vif
.bss_conf
.qos
= true;
1859 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1861 lockdep_assert_held(&sdata
->local
->mtx
);
1863 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1864 ieee80211_run_deferred_scan(sdata
->local
);
1867 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1869 mutex_lock(&sdata
->local
->mtx
);
1870 __ieee80211_stop_poll(sdata
);
1871 mutex_unlock(&sdata
->local
->mtx
);
1874 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1875 u16 capab
, bool erp_valid
, u8 erp
)
1877 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1879 bool use_protection
;
1880 bool use_short_preamble
;
1881 bool use_short_slot
;
1884 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1885 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1887 use_protection
= false;
1888 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1891 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1892 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1893 use_short_slot
= true;
1895 if (use_protection
!= bss_conf
->use_cts_prot
) {
1896 bss_conf
->use_cts_prot
= use_protection
;
1897 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1900 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1901 bss_conf
->use_short_preamble
= use_short_preamble
;
1902 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1905 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1906 bss_conf
->use_short_slot
= use_short_slot
;
1907 changed
|= BSS_CHANGED_ERP_SLOT
;
1913 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1914 struct cfg80211_bss
*cbss
,
1915 u32 bss_info_changed
)
1917 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1918 struct ieee80211_local
*local
= sdata
->local
;
1919 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1921 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1922 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1923 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1925 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1926 beacon_loss_count
* bss_conf
->beacon_int
));
1928 sdata
->u
.mgd
.associated
= cbss
;
1929 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1931 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1933 if (sdata
->vif
.p2p
) {
1934 const struct cfg80211_bss_ies
*ies
;
1937 ies
= rcu_dereference(cbss
->ies
);
1941 ret
= cfg80211_get_p2p_attr(
1942 ies
->data
, ies
->len
,
1943 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1944 (u8
*) &bss_conf
->p2p_noa_attr
,
1945 sizeof(bss_conf
->p2p_noa_attr
));
1947 sdata
->u
.mgd
.p2p_noa_index
=
1948 bss_conf
->p2p_noa_attr
.index
;
1949 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1955 /* just to be sure */
1956 ieee80211_stop_poll(sdata
);
1958 ieee80211_led_assoc(local
, 1);
1960 if (sdata
->u
.mgd
.have_beacon
) {
1962 * If the AP is buggy we may get here with no DTIM period
1963 * known, so assume it's 1 which is the only safe assumption
1964 * in that case, although if the TIM IE is broken powersave
1965 * probably just won't work at all.
1967 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1968 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1969 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1971 bss_conf
->beacon_rate
= NULL
;
1972 bss_conf
->dtim_period
= 0;
1975 bss_conf
->assoc
= 1;
1977 /* Tell the driver to monitor connection quality (if supported) */
1978 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1979 bss_conf
->cqm_rssi_thold
)
1980 bss_info_changed
|= BSS_CHANGED_CQM
;
1982 /* Enable ARP filtering */
1983 if (bss_conf
->arp_addr_cnt
)
1984 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1986 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1988 mutex_lock(&local
->iflist_mtx
);
1989 ieee80211_recalc_ps(local
);
1990 mutex_unlock(&local
->iflist_mtx
);
1992 ieee80211_recalc_smps(sdata
);
1993 ieee80211_recalc_ps_vif(sdata
);
1995 netif_carrier_on(sdata
->dev
);
1998 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1999 u16 stype
, u16 reason
, bool tx
,
2002 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2003 struct ieee80211_local
*local
= sdata
->local
;
2006 sdata_assert_lock(sdata
);
2008 if (WARN_ON_ONCE(tx
&& !frame_buf
))
2011 if (WARN_ON(!ifmgd
->associated
))
2014 ieee80211_stop_poll(sdata
);
2016 ifmgd
->associated
= NULL
;
2017 netif_carrier_off(sdata
->dev
);
2020 * if we want to get out of ps before disassoc (why?) we have
2021 * to do it before sending disassoc, as otherwise the null-packet
2024 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2025 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2026 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2028 local
->ps_sdata
= NULL
;
2030 /* disable per-vif ps */
2031 ieee80211_recalc_ps_vif(sdata
);
2033 /* make sure ongoing transmission finishes */
2037 * drop any frame before deauth/disassoc, this can be data or
2038 * management frame. Since we are disconnecting, we should not
2039 * insist sending these frames which can take time and delay
2040 * the disconnection and possible the roaming.
2043 ieee80211_flush_queues(local
, sdata
, true);
2045 /* deauthenticate/disassociate now */
2046 if (tx
|| frame_buf
)
2047 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
2048 reason
, tx
, frame_buf
);
2050 /* flush out frame - make sure the deauth was actually sent */
2052 ieee80211_flush_queues(local
, sdata
, false);
2054 /* clear bssid only after building the needed mgmt frames */
2055 eth_zero_addr(ifmgd
->bssid
);
2057 /* remove AP and TDLS peers */
2058 sta_info_flush(sdata
);
2060 /* finally reset all BSS / config parameters */
2061 changed
|= ieee80211_reset_erp_info(sdata
);
2063 ieee80211_led_assoc(local
, 0);
2064 changed
|= BSS_CHANGED_ASSOC
;
2065 sdata
->vif
.bss_conf
.assoc
= false;
2067 ifmgd
->p2p_noa_index
= -1;
2068 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
2069 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
2071 /* on the next assoc, re-program HT/VHT parameters */
2072 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
2073 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
2074 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
2075 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
2076 sdata
->flags
&= ~IEEE80211_SDATA_MU_MIMO_OWNER
;
2078 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
2080 del_timer_sync(&local
->dynamic_ps_timer
);
2081 cancel_work_sync(&local
->dynamic_ps_enable_work
);
2083 /* Disable ARP filtering */
2084 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
2085 changed
|= BSS_CHANGED_ARP_FILTER
;
2087 sdata
->vif
.bss_conf
.qos
= false;
2088 changed
|= BSS_CHANGED_QOS
;
2090 /* The BSSID (not really interesting) and HT changed */
2091 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
2092 ieee80211_bss_info_change_notify(sdata
, changed
);
2094 /* disassociated - set to defaults now */
2095 ieee80211_set_wmm_default(sdata
, false, false);
2097 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
2098 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
2099 del_timer_sync(&sdata
->u
.mgd
.timer
);
2100 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
2102 sdata
->vif
.bss_conf
.dtim_period
= 0;
2103 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
2105 ifmgd
->have_beacon
= false;
2108 mutex_lock(&local
->mtx
);
2109 ieee80211_vif_release_channel(sdata
);
2111 sdata
->vif
.csa_active
= false;
2112 ifmgd
->csa_waiting_bcn
= false;
2113 ifmgd
->csa_ignored_same_chan
= false;
2114 if (sdata
->csa_block_tx
) {
2115 ieee80211_wake_vif_queues(local
, sdata
,
2116 IEEE80211_QUEUE_STOP_REASON_CSA
);
2117 sdata
->csa_block_tx
= false;
2119 mutex_unlock(&local
->mtx
);
2121 /* existing TX TSPEC sessions no longer exist */
2122 memset(ifmgd
->tx_tspec
, 0, sizeof(ifmgd
->tx_tspec
));
2123 cancel_delayed_work_sync(&ifmgd
->tx_tspec_wk
);
2125 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2128 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
2129 struct ieee80211_hdr
*hdr
)
2132 * We can postpone the mgd.timer whenever receiving unicast frames
2133 * from AP because we know that the connection is working both ways
2134 * at that time. But multicast frames (and hence also beacons) must
2135 * be ignored here, because we need to trigger the timer during
2136 * data idle periods for sending the periodic probe request to the
2137 * AP we're connected to.
2139 if (is_multicast_ether_addr(hdr
->addr1
))
2142 ieee80211_sta_reset_conn_monitor(sdata
);
2145 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
2147 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2148 struct ieee80211_local
*local
= sdata
->local
;
2150 mutex_lock(&local
->mtx
);
2151 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
2154 __ieee80211_stop_poll(sdata
);
2156 mutex_lock(&local
->iflist_mtx
);
2157 ieee80211_recalc_ps(local
);
2158 mutex_unlock(&local
->iflist_mtx
);
2160 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
2164 * We've received a probe response, but are not sure whether
2165 * we have or will be receiving any beacons or data, so let's
2166 * schedule the timers again, just in case.
2168 ieee80211_sta_reset_beacon_monitor(sdata
);
2170 mod_timer(&ifmgd
->conn_mon_timer
,
2171 round_jiffies_up(jiffies
+
2172 IEEE80211_CONNECTION_IDLE_TIME
));
2174 mutex_unlock(&local
->mtx
);
2177 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data
*sdata
,
2178 struct ieee80211_hdr
*hdr
,
2181 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2182 u16 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
2183 int ac
= ieee80211_ac_from_tid(tid
);
2184 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
2185 unsigned long now
= jiffies
;
2187 if (likely(!tx_tspec
->admitted_time
))
2190 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
2191 tx_tspec
->consumed_tx_time
= 0;
2192 tx_tspec
->time_slice_start
= now
;
2194 if (tx_tspec
->downgraded
) {
2195 tx_tspec
->action
= TX_TSPEC_ACTION_STOP_DOWNGRADE
;
2196 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2200 if (tx_tspec
->downgraded
)
2203 tx_tspec
->consumed_tx_time
+= tx_time
;
2205 if (tx_tspec
->consumed_tx_time
>= tx_tspec
->admitted_time
) {
2206 tx_tspec
->downgraded
= true;
2207 tx_tspec
->action
= TX_TSPEC_ACTION_DOWNGRADE
;
2208 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2212 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
2213 struct ieee80211_hdr
*hdr
, bool ack
, u16 tx_time
)
2215 ieee80211_sta_tx_wmm_ac_notify(sdata
, hdr
, tx_time
);
2217 if (!ieee80211_is_data(hdr
->frame_control
))
2220 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
2221 sdata
->u
.mgd
.probe_send_count
> 0) {
2223 ieee80211_sta_reset_conn_monitor(sdata
);
2225 sdata
->u
.mgd
.nullfunc_failed
= true;
2226 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2231 ieee80211_sta_reset_conn_monitor(sdata
);
2234 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2236 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2238 u8
*dst
= ifmgd
->associated
->bssid
;
2239 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2242 * Try sending broadcast probe requests for the last three
2243 * probe requests after the first ones failed since some
2244 * buggy APs only support broadcast probe requests.
2246 if (ifmgd
->probe_send_count
>= unicast_limit
)
2250 * When the hardware reports an accurate Tx ACK status, it's
2251 * better to send a nullfunc frame instead of a probe request,
2252 * as it will kick us off the AP quickly if we aren't associated
2253 * anymore. The timeout will be reset if the frame is ACKed by
2256 ifmgd
->probe_send_count
++;
2258 if (ieee80211_hw_check(&sdata
->local
->hw
, REPORTS_TX_ACK_STATUS
)) {
2259 ifmgd
->nullfunc_failed
= false;
2260 ieee80211_send_nullfunc(sdata
->local
, sdata
, false);
2265 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2266 if (WARN_ON_ONCE(ssid
== NULL
))
2271 ieee80211_send_probe_req(sdata
, sdata
->vif
.addr
, dst
,
2272 ssid
+ 2, ssid_len
, NULL
,
2273 0, (u32
) -1, true, 0,
2274 ifmgd
->associated
->channel
, false);
2278 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2279 run_again(sdata
, ifmgd
->probe_timeout
);
2282 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2285 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2286 bool already
= false;
2288 if (!ieee80211_sdata_running(sdata
))
2293 if (!ifmgd
->associated
)
2296 mutex_lock(&sdata
->local
->mtx
);
2298 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2299 mutex_unlock(&sdata
->local
->mtx
);
2304 mlme_dbg_ratelimited(sdata
,
2305 "detected beacon loss from AP (missed %d beacons) - probing\n",
2308 ieee80211_cqm_beacon_loss_notify(&sdata
->vif
, GFP_KERNEL
);
2312 * The driver/our work has already reported this event or the
2313 * connection monitoring has kicked in and we have already sent
2314 * a probe request. Or maybe the AP died and the driver keeps
2315 * reporting until we disassociate...
2317 * In either case we have to ignore the current call to this
2318 * function (except for setting the correct probe reason bit)
2319 * because otherwise we would reset the timer every time and
2320 * never check whether we received a probe response!
2322 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
2325 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2327 mutex_unlock(&sdata
->local
->mtx
);
2332 mutex_lock(&sdata
->local
->iflist_mtx
);
2333 ieee80211_recalc_ps(sdata
->local
);
2334 mutex_unlock(&sdata
->local
->iflist_mtx
);
2336 ifmgd
->probe_send_count
= 0;
2337 ieee80211_mgd_probe_ap_send(sdata
);
2339 sdata_unlock(sdata
);
2342 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2343 struct ieee80211_vif
*vif
)
2345 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2346 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2347 struct cfg80211_bss
*cbss
;
2348 struct sk_buff
*skb
;
2352 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2355 sdata_assert_lock(sdata
);
2357 if (ifmgd
->associated
)
2358 cbss
= ifmgd
->associated
;
2359 else if (ifmgd
->auth_data
)
2360 cbss
= ifmgd
->auth_data
->bss
;
2361 else if (ifmgd
->assoc_data
)
2362 cbss
= ifmgd
->assoc_data
->bss
;
2367 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2368 if (WARN_ON_ONCE(ssid
== NULL
))
2373 skb
= ieee80211_build_probe_req(sdata
, sdata
->vif
.addr
, cbss
->bssid
,
2374 (u32
) -1, cbss
->channel
,
2381 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2383 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data
*sdata
,
2384 const u8
*buf
, size_t len
, bool tx
,
2387 struct ieee80211_event event
= {
2389 .u
.mlme
.data
= tx
? DEAUTH_TX_EVENT
: DEAUTH_RX_EVENT
,
2390 .u
.mlme
.reason
= reason
,
2394 cfg80211_tx_mlme_mgmt(sdata
->dev
, buf
, len
);
2396 cfg80211_rx_mlme_mgmt(sdata
->dev
, buf
, len
);
2398 drv_event_callback(sdata
->local
, sdata
, &event
);
2401 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2403 struct ieee80211_local
*local
= sdata
->local
;
2404 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2405 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2408 if (!ifmgd
->associated
) {
2409 sdata_unlock(sdata
);
2413 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2414 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2416 mutex_lock(&local
->mtx
);
2417 sdata
->vif
.csa_active
= false;
2418 ifmgd
->csa_waiting_bcn
= false;
2419 if (sdata
->csa_block_tx
) {
2420 ieee80211_wake_vif_queues(local
, sdata
,
2421 IEEE80211_QUEUE_STOP_REASON_CSA
);
2422 sdata
->csa_block_tx
= false;
2424 mutex_unlock(&local
->mtx
);
2426 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
2427 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2429 sdata_unlock(sdata
);
2432 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2434 struct ieee80211_sub_if_data
*sdata
=
2435 container_of(work
, struct ieee80211_sub_if_data
,
2436 u
.mgd
.beacon_connection_loss_work
);
2437 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2439 if (ifmgd
->associated
)
2440 ifmgd
->beacon_loss_count
++;
2442 if (ifmgd
->connection_loss
) {
2443 sdata_info(sdata
, "Connection to AP %pM lost\n",
2445 __ieee80211_disconnect(sdata
);
2447 ieee80211_mgd_probe_ap(sdata
, true);
2451 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2453 struct ieee80211_sub_if_data
*sdata
=
2454 container_of(work
, struct ieee80211_sub_if_data
,
2455 u
.mgd
.csa_connection_drop_work
);
2457 __ieee80211_disconnect(sdata
);
2460 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2462 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2463 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2465 trace_api_beacon_loss(sdata
);
2467 sdata
->u
.mgd
.connection_loss
= false;
2468 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2470 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2472 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2474 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2475 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2477 trace_api_connection_loss(sdata
);
2479 sdata
->u
.mgd
.connection_loss
= true;
2480 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2482 EXPORT_SYMBOL(ieee80211_connection_loss
);
2485 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2488 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2490 sdata_assert_lock(sdata
);
2494 * we are not authenticated yet, the only timer that could be
2495 * running is the timeout for the authentication response which
2496 * which is not relevant anymore.
2498 del_timer_sync(&sdata
->u
.mgd
.timer
);
2499 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2501 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2502 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2503 sdata
->u
.mgd
.flags
= 0;
2504 mutex_lock(&sdata
->local
->mtx
);
2505 ieee80211_vif_release_channel(sdata
);
2506 mutex_unlock(&sdata
->local
->mtx
);
2509 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2511 sdata
->u
.mgd
.auth_data
= NULL
;
2514 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2517 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2519 sdata_assert_lock(sdata
);
2523 * we are not associated yet, the only timer that could be
2524 * running is the timeout for the association response which
2525 * which is not relevant anymore.
2527 del_timer_sync(&sdata
->u
.mgd
.timer
);
2528 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2530 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2531 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2532 sdata
->u
.mgd
.flags
= 0;
2533 sdata
->flags
&= ~IEEE80211_SDATA_MU_MIMO_OWNER
;
2534 mutex_lock(&sdata
->local
->mtx
);
2535 ieee80211_vif_release_channel(sdata
);
2536 mutex_unlock(&sdata
->local
->mtx
);
2540 sdata
->u
.mgd
.assoc_data
= NULL
;
2543 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2544 struct ieee80211_mgmt
*mgmt
, size_t len
)
2546 struct ieee80211_local
*local
= sdata
->local
;
2547 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2549 struct ieee802_11_elems elems
;
2552 pos
= mgmt
->u
.auth
.variable
;
2553 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2554 if (!elems
.challenge
)
2556 auth_data
->expected_transaction
= 4;
2557 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2558 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
2559 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2560 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2561 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2562 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2563 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2564 auth_data
->key
, auth_data
->key_len
,
2565 auth_data
->key_idx
, tx_flags
);
2568 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2569 struct ieee80211_mgmt
*mgmt
, size_t len
)
2571 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2573 u16 auth_alg
, auth_transaction
, status_code
;
2574 struct sta_info
*sta
;
2575 struct ieee80211_event event
= {
2577 .u
.mlme
.data
= AUTH_EVENT
,
2580 sdata_assert_lock(sdata
);
2585 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2588 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2590 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2593 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2594 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2595 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2597 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2598 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2599 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2600 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2602 ifmgd
->auth_data
->expected_transaction
);
2606 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2607 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2608 mgmt
->sa
, status_code
);
2609 ieee80211_destroy_auth_data(sdata
, false);
2610 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2611 event
.u
.mlme
.status
= MLME_DENIED
;
2612 event
.u
.mlme
.reason
= status_code
;
2613 drv_event_callback(sdata
->local
, sdata
, &event
);
2617 switch (ifmgd
->auth_data
->algorithm
) {
2618 case WLAN_AUTH_OPEN
:
2619 case WLAN_AUTH_LEAP
:
2623 case WLAN_AUTH_SHARED_KEY
:
2624 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2625 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2626 /* need another frame */
2631 WARN_ONCE(1, "invalid auth alg %d",
2632 ifmgd
->auth_data
->algorithm
);
2636 event
.u
.mlme
.status
= MLME_SUCCESS
;
2637 drv_event_callback(sdata
->local
, sdata
, &event
);
2638 sdata_info(sdata
, "authenticated\n");
2639 ifmgd
->auth_data
->done
= true;
2640 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2641 ifmgd
->auth_data
->timeout_started
= true;
2642 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2644 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2645 ifmgd
->auth_data
->expected_transaction
!= 2) {
2647 * Report auth frame to user space for processing since another
2648 * round of Authentication frames is still needed.
2650 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2654 /* move station state to auth */
2655 mutex_lock(&sdata
->local
->sta_mtx
);
2656 sta
= sta_info_get(sdata
, bssid
);
2658 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2661 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2662 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2665 mutex_unlock(&sdata
->local
->sta_mtx
);
2667 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2670 mutex_unlock(&sdata
->local
->sta_mtx
);
2671 /* ignore frame -- wait for timeout */
2674 #define case_WLAN(type) \
2675 case WLAN_REASON_##type: return #type
2677 static const char *ieee80211_get_reason_code_string(u16 reason_code
)
2679 switch (reason_code
) {
2680 case_WLAN(UNSPECIFIED
);
2681 case_WLAN(PREV_AUTH_NOT_VALID
);
2682 case_WLAN(DEAUTH_LEAVING
);
2683 case_WLAN(DISASSOC_DUE_TO_INACTIVITY
);
2684 case_WLAN(DISASSOC_AP_BUSY
);
2685 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA
);
2686 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA
);
2687 case_WLAN(DISASSOC_STA_HAS_LEFT
);
2688 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH
);
2689 case_WLAN(DISASSOC_BAD_POWER
);
2690 case_WLAN(DISASSOC_BAD_SUPP_CHAN
);
2691 case_WLAN(INVALID_IE
);
2692 case_WLAN(MIC_FAILURE
);
2693 case_WLAN(4WAY_HANDSHAKE_TIMEOUT
);
2694 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT
);
2695 case_WLAN(IE_DIFFERENT
);
2696 case_WLAN(INVALID_GROUP_CIPHER
);
2697 case_WLAN(INVALID_PAIRWISE_CIPHER
);
2698 case_WLAN(INVALID_AKMP
);
2699 case_WLAN(UNSUPP_RSN_VERSION
);
2700 case_WLAN(INVALID_RSN_IE_CAP
);
2701 case_WLAN(IEEE8021X_FAILED
);
2702 case_WLAN(CIPHER_SUITE_REJECTED
);
2703 case_WLAN(DISASSOC_UNSPECIFIED_QOS
);
2704 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH
);
2705 case_WLAN(DISASSOC_LOW_ACK
);
2706 case_WLAN(DISASSOC_QAP_EXCEED_TXOP
);
2707 case_WLAN(QSTA_LEAVE_QBSS
);
2708 case_WLAN(QSTA_NOT_USE
);
2709 case_WLAN(QSTA_REQUIRE_SETUP
);
2710 case_WLAN(QSTA_TIMEOUT
);
2711 case_WLAN(QSTA_CIPHER_NOT_SUPP
);
2712 case_WLAN(MESH_PEER_CANCELED
);
2713 case_WLAN(MESH_MAX_PEERS
);
2714 case_WLAN(MESH_CONFIG
);
2715 case_WLAN(MESH_CLOSE
);
2716 case_WLAN(MESH_MAX_RETRIES
);
2717 case_WLAN(MESH_CONFIRM_TIMEOUT
);
2718 case_WLAN(MESH_INVALID_GTK
);
2719 case_WLAN(MESH_INCONSISTENT_PARAM
);
2720 case_WLAN(MESH_INVALID_SECURITY
);
2721 case_WLAN(MESH_PATH_ERROR
);
2722 case_WLAN(MESH_PATH_NOFORWARD
);
2723 case_WLAN(MESH_PATH_DEST_UNREACHABLE
);
2724 case_WLAN(MAC_EXISTS_IN_MBSS
);
2725 case_WLAN(MESH_CHAN_REGULATORY
);
2726 case_WLAN(MESH_CHAN
);
2727 default: return "<unknown>";
2731 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2732 struct ieee80211_mgmt
*mgmt
, size_t len
)
2734 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2735 u16 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2737 sdata_assert_lock(sdata
);
2742 if (ifmgd
->associated
&&
2743 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
)) {
2744 const u8
*bssid
= ifmgd
->associated
->bssid
;
2746 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u=%s)\n",
2748 ieee80211_get_reason_code_string(reason_code
));
2750 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2752 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false,
2757 if (ifmgd
->assoc_data
&&
2758 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2759 const u8
*bssid
= ifmgd
->assoc_data
->bss
->bssid
;
2762 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2764 ieee80211_get_reason_code_string(reason_code
));
2766 ieee80211_destroy_assoc_data(sdata
, false);
2768 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2774 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2775 struct ieee80211_mgmt
*mgmt
, size_t len
)
2777 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2780 sdata_assert_lock(sdata
);
2785 if (!ifmgd
->associated
||
2786 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2789 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2791 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2792 mgmt
->sa
, reason_code
);
2794 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2796 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false, reason_code
);
2799 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2800 u8
*supp_rates
, unsigned int supp_rates_len
,
2801 u32
*rates
, u32
*basic_rates
,
2802 bool *have_higher_than_11mbit
,
2803 int *min_rate
, int *min_rate_index
,
2804 int shift
, u32 rate_flags
)
2808 for (i
= 0; i
< supp_rates_len
; i
++) {
2809 int rate
= supp_rates
[i
] & 0x7f;
2810 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2812 if ((rate
* 5 * (1 << shift
)) > 110)
2813 *have_higher_than_11mbit
= true;
2816 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2817 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2819 * Note: Even through the membership selector and the basic
2820 * rate flag share the same bit, they are not exactly
2823 if (!!(supp_rates
[i
] & 0x80) &&
2824 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2827 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2828 struct ieee80211_rate
*br
;
2831 br
= &sband
->bitrates
[j
];
2832 if ((rate_flags
& br
->flags
) != rate_flags
)
2835 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2836 if (brate
== rate
) {
2839 *basic_rates
|= BIT(j
);
2840 if ((rate
* 5) < *min_rate
) {
2841 *min_rate
= rate
* 5;
2842 *min_rate_index
= j
;
2850 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2851 struct cfg80211_bss
*cbss
,
2852 struct ieee80211_mgmt
*mgmt
, size_t len
)
2854 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2855 struct ieee80211_local
*local
= sdata
->local
;
2856 struct ieee80211_supported_band
*sband
;
2857 struct sta_info
*sta
;
2859 u16 capab_info
, aid
;
2860 struct ieee802_11_elems elems
;
2861 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2862 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2863 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2868 /* AssocResp and ReassocResp have identical structure */
2870 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2871 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2873 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2874 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2876 aid
&= ~(BIT(15) | BIT(14));
2878 ifmgd
->broken_ap
= false;
2880 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2881 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2884 ifmgd
->broken_ap
= true;
2887 pos
= mgmt
->u
.assoc_resp
.variable
;
2888 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2890 if (!elems
.supp_rates
) {
2891 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2896 ifmgd
->tdls_chan_switch_prohibited
=
2897 elems
.ext_capab
&& elems
.ext_capab_len
>= 5 &&
2898 (elems
.ext_capab
[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED
);
2901 * Some APs are erroneously not including some information in their
2902 * (re)association response frames. Try to recover by using the data
2903 * from the beacon or probe response. This seems to afflict mobile
2904 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2905 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2907 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2908 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2909 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2910 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2911 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2912 const struct cfg80211_bss_ies
*ies
;
2913 struct ieee802_11_elems bss_elems
;
2916 ies
= rcu_dereference(cbss
->ies
);
2918 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2924 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2926 if (assoc_data
->wmm
&&
2927 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2928 elems
.wmm_param
= bss_elems
.wmm_param
;
2930 "AP bug: WMM param missing from AssocResp\n");
2934 * Also check if we requested HT/VHT, otherwise the AP doesn't
2935 * have to include the IEs in the (re)association response.
2937 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2938 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2939 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2941 "AP bug: HT capability missing from AssocResp\n");
2943 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2944 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2945 elems
.ht_operation
= bss_elems
.ht_operation
;
2947 "AP bug: HT operation missing from AssocResp\n");
2949 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2950 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2951 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2953 "AP bug: VHT capa missing from AssocResp\n");
2955 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2956 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2957 elems
.vht_operation
= bss_elems
.vht_operation
;
2959 "AP bug: VHT operation missing from AssocResp\n");
2964 * We previously checked these in the beacon/probe response, so
2965 * they should be present here. This is just a safety net.
2967 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2968 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2970 "HT AP is missing WMM params or HT capability/operation\n");
2975 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2976 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2978 "VHT AP is missing VHT capability/operation\n");
2983 mutex_lock(&sdata
->local
->sta_mtx
);
2985 * station info was already allocated and inserted before
2986 * the association and should be available to us
2988 sta
= sta_info_get(sdata
, cbss
->bssid
);
2989 if (WARN_ON(!sta
)) {
2990 mutex_unlock(&sdata
->local
->sta_mtx
);
2995 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2997 /* Set up internal HT/VHT capabilities */
2998 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2999 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
3000 elems
.ht_cap_elem
, sta
);
3002 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
3003 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
3004 elems
.vht_cap_elem
, sta
);
3007 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3008 * in their association response, so ignore that data for our own
3009 * configuration. If it changed since the last beacon, we'll get the
3010 * next beacon and update then.
3014 * If an operating mode notification IE is present, override the
3015 * NSS calculation (that would be done in rate_control_rate_init())
3016 * and use the # of streams from that element.
3018 if (elems
.opmode_notif
&&
3019 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
3022 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
3023 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
3025 sta
->sta
.rx_nss
= nss
;
3028 rate_control_rate_init(sta
);
3030 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
) {
3031 set_sta_flag(sta
, WLAN_STA_MFP
);
3032 sta
->sta
.mfp
= true;
3034 sta
->sta
.mfp
= false;
3037 sta
->sta
.wme
= elems
.wmm_param
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
;
3039 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
3040 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
3041 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
3044 "failed to move station %pM to desired state\n",
3046 WARN_ON(__sta_info_destroy(sta
));
3047 mutex_unlock(&sdata
->local
->sta_mtx
);
3052 mutex_unlock(&sdata
->local
->sta_mtx
);
3055 * Always handle WMM once after association regardless
3056 * of the first value the AP uses. Setting -1 here has
3057 * that effect because the AP values is an unsigned
3060 ifmgd
->wmm_last_param_set
= -1;
3062 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
3063 ieee80211_set_wmm_default(sdata
, false, false);
3064 } else if (!ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3065 elems
.wmm_param_len
)) {
3066 /* still enable QoS since we might have HT/VHT */
3067 ieee80211_set_wmm_default(sdata
, false, true);
3068 /* set the disable-WMM flag in this case to disable
3069 * tracking WMM parameter changes in the beacon if
3070 * the parameters weren't actually valid. Doing so
3071 * avoids changing parameters very strangely when
3072 * the AP is going back and forth between valid and
3073 * invalid parameters.
3075 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
3077 changed
|= BSS_CHANGED_QOS
;
3079 /* set AID and assoc capability,
3080 * ieee80211_set_associated() will tell the driver */
3081 bss_conf
->aid
= aid
;
3082 bss_conf
->assoc_capability
= capab_info
;
3083 ieee80211_set_associated(sdata
, cbss
, changed
);
3086 * If we're using 4-addr mode, let the AP know that we're
3087 * doing so, so that it can create the STA VLAN on its side
3089 if (ifmgd
->use_4addr
)
3090 ieee80211_send_4addr_nullfunc(local
, sdata
);
3093 * Start timer to probe the connection to the AP now.
3094 * Also start the timer that will detect beacon loss.
3096 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
3097 ieee80211_sta_reset_beacon_monitor(sdata
);
3105 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
3106 struct ieee80211_mgmt
*mgmt
,
3109 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3110 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
3111 u16 capab_info
, status_code
, aid
;
3112 struct ieee802_11_elems elems
;
3113 int ac
, uapsd_queues
= -1;
3116 struct cfg80211_bss
*bss
;
3117 struct ieee80211_event event
= {
3119 .u
.mlme
.data
= ASSOC_EVENT
,
3122 sdata_assert_lock(sdata
);
3126 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
3130 * AssocResp and ReassocResp have identical structure, so process both
3131 * of them in this function.
3137 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
3138 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
3139 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
3140 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
3143 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3144 reassoc
? "Rea" : "A", mgmt
->sa
,
3145 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
3147 pos
= mgmt
->u
.assoc_resp
.variable
;
3148 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
3150 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
3151 elems
.timeout_int
&&
3152 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
3154 tu
= le32_to_cpu(elems
.timeout_int
->value
);
3155 ms
= tu
* 1024 / 1000;
3157 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3159 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
3160 assoc_data
->timeout_started
= true;
3161 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
3162 run_again(sdata
, assoc_data
->timeout
);
3166 bss
= assoc_data
->bss
;
3168 if (status_code
!= WLAN_STATUS_SUCCESS
) {
3169 sdata_info(sdata
, "%pM denied association (code=%d)\n",
3170 mgmt
->sa
, status_code
);
3171 ieee80211_destroy_assoc_data(sdata
, false);
3172 event
.u
.mlme
.status
= MLME_DENIED
;
3173 event
.u
.mlme
.reason
= status_code
;
3174 drv_event_callback(sdata
->local
, sdata
, &event
);
3176 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
3177 /* oops -- internal error -- send timeout for now */
3178 ieee80211_destroy_assoc_data(sdata
, false);
3179 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3182 event
.u
.mlme
.status
= MLME_SUCCESS
;
3183 drv_event_callback(sdata
->local
, sdata
, &event
);
3184 sdata_info(sdata
, "associated\n");
3187 * destroy assoc_data afterwards, as otherwise an idle
3188 * recalc after assoc_data is NULL but before associated
3189 * is set can cause the interface to go idle
3191 ieee80211_destroy_assoc_data(sdata
, true);
3193 /* get uapsd queues configuration */
3195 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
3196 if (sdata
->tx_conf
[ac
].uapsd
)
3197 uapsd_queues
|= BIT(ac
);
3200 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
, uapsd_queues
);
3203 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
3204 struct ieee80211_mgmt
*mgmt
, size_t len
,
3205 struct ieee80211_rx_status
*rx_status
,
3206 struct ieee802_11_elems
*elems
)
3208 struct ieee80211_local
*local
= sdata
->local
;
3209 struct ieee80211_bss
*bss
;
3210 struct ieee80211_channel
*channel
;
3212 sdata_assert_lock(sdata
);
3214 channel
= ieee80211_get_channel(local
->hw
.wiphy
, rx_status
->freq
);
3218 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
3221 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
3222 ieee80211_rx_bss_put(local
, bss
);
3227 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
3228 struct sk_buff
*skb
)
3230 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
3231 struct ieee80211_if_managed
*ifmgd
;
3232 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
3233 size_t baselen
, len
= skb
->len
;
3234 struct ieee802_11_elems elems
;
3236 ifmgd
= &sdata
->u
.mgd
;
3238 sdata_assert_lock(sdata
);
3240 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
3241 return; /* ignore ProbeResp to foreign address */
3243 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
3247 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
3250 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3252 if (ifmgd
->associated
&&
3253 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3254 ieee80211_reset_ap_probe(sdata
);
3258 * This is the canonical list of information elements we care about,
3259 * the filter code also gives us all changes to the Microsoft OUI
3260 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3261 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3262 * changes to requested client power.
3264 * We implement beacon filtering in software since that means we can
3265 * avoid processing the frame here and in cfg80211, and userspace
3266 * will not be able to tell whether the hardware supports it or not.
3268 * XXX: This list needs to be dynamic -- userspace needs to be able to
3269 * add items it requires. It also needs to be able to tell us to
3270 * look out for other vendor IEs.
3272 static const u64 care_about_ies
=
3273 (1ULL << WLAN_EID_COUNTRY
) |
3274 (1ULL << WLAN_EID_ERP_INFO
) |
3275 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
3276 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
3277 (1ULL << WLAN_EID_HT_CAPABILITY
) |
3278 (1ULL << WLAN_EID_HT_OPERATION
) |
3279 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN
);
3281 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
3282 struct ieee80211_mgmt
*mgmt
, size_t len
,
3283 struct ieee80211_rx_status
*rx_status
)
3285 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3286 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
3288 struct ieee802_11_elems elems
;
3289 struct ieee80211_local
*local
= sdata
->local
;
3290 struct ieee80211_chanctx_conf
*chanctx_conf
;
3291 struct ieee80211_channel
*chan
;
3292 struct sta_info
*sta
;
3298 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3300 sdata_assert_lock(sdata
);
3302 /* Process beacon from the current BSS */
3303 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
3308 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3309 if (!chanctx_conf
) {
3314 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
3318 chan
= chanctx_conf
->def
.chan
;
3321 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
3322 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
3323 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
3324 len
- baselen
, false, &elems
);
3326 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3327 if (elems
.tim
&& !elems
.parse_error
) {
3328 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
3329 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
3331 ifmgd
->have_beacon
= true;
3332 ifmgd
->assoc_data
->need_beacon
= false;
3333 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3334 sdata
->vif
.bss_conf
.sync_tsf
=
3335 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3336 sdata
->vif
.bss_conf
.sync_device_ts
=
3337 rx_status
->device_timestamp
;
3339 sdata
->vif
.bss_conf
.sync_dtim_count
=
3340 elems
.tim
->dtim_count
;
3342 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3344 /* continue assoc process */
3345 ifmgd
->assoc_data
->timeout
= jiffies
;
3346 ifmgd
->assoc_data
->timeout_started
= true;
3347 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3351 if (!ifmgd
->associated
||
3352 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3354 bssid
= ifmgd
->associated
->bssid
;
3356 /* Track average RSSI from the Beacon frames of the current AP */
3357 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3358 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3359 ewma_beacon_signal_init(&ifmgd
->ave_beacon_signal
);
3360 ifmgd
->last_cqm_event_signal
= 0;
3361 ifmgd
->count_beacon_signal
= 1;
3362 ifmgd
->last_ave_beacon_signal
= 0;
3364 ifmgd
->count_beacon_signal
++;
3367 ewma_beacon_signal_add(&ifmgd
->ave_beacon_signal
, -rx_status
->signal
);
3369 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3370 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3371 int sig
= -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
3372 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3373 struct ieee80211_event event
= {
3378 * if signal crosses either of the boundaries, invoke callback
3379 * with appropriate parameters
3381 if (sig
> ifmgd
->rssi_max_thold
&&
3382 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3383 ifmgd
->last_ave_beacon_signal
= sig
;
3384 event
.u
.rssi
.data
= RSSI_EVENT_HIGH
;
3385 drv_event_callback(local
, sdata
, &event
);
3386 } else if (sig
< ifmgd
->rssi_min_thold
&&
3387 (last_sig
>= ifmgd
->rssi_max_thold
||
3389 ifmgd
->last_ave_beacon_signal
= sig
;
3390 event
.u
.rssi
.data
= RSSI_EVENT_LOW
;
3391 drv_event_callback(local
, sdata
, &event
);
3395 if (bss_conf
->cqm_rssi_thold
&&
3396 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3397 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3398 int sig
= -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
3399 int last_event
= ifmgd
->last_cqm_event_signal
;
3400 int thold
= bss_conf
->cqm_rssi_thold
;
3401 int hyst
= bss_conf
->cqm_rssi_hyst
;
3404 (last_event
== 0 || sig
< last_event
- hyst
)) {
3405 ifmgd
->last_cqm_event_signal
= sig
;
3406 ieee80211_cqm_rssi_notify(
3408 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3410 } else if (sig
> thold
&&
3411 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3412 ifmgd
->last_cqm_event_signal
= sig
;
3413 ieee80211_cqm_rssi_notify(
3415 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3420 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
3421 mlme_dbg_ratelimited(sdata
,
3422 "cancelling AP probe due to a received beacon\n");
3423 ieee80211_reset_ap_probe(sdata
);
3427 * Push the beacon loss detection into the future since
3428 * we are processing a beacon from the AP just now.
3430 ieee80211_sta_reset_beacon_monitor(sdata
);
3432 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3433 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3434 len
- baselen
, false, &elems
,
3435 care_about_ies
, ncrc
);
3437 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
3438 ieee80211_check_tim(elems
.tim
, elems
.tim_len
, ifmgd
->aid
)) {
3439 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3440 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3441 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3442 ieee80211_hw_config(local
,
3443 IEEE80211_CONF_CHANGE_PS
);
3445 ieee80211_send_nullfunc(local
, sdata
, false);
3446 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3447 local
->pspolling
= true;
3450 * Here is assumed that the driver will be
3451 * able to send ps-poll frame and receive a
3452 * response even though power save mode is
3453 * enabled, but some drivers might require
3454 * to disable power save here. This needs
3455 * to be investigated.
3457 ieee80211_send_pspoll(local
, sdata
);
3461 if (sdata
->vif
.p2p
) {
3462 struct ieee80211_p2p_noa_attr noa
= {};
3465 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3467 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3468 (u8
*) &noa
, sizeof(noa
));
3470 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3471 /* valid noa_attr and index changed */
3472 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3473 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3474 changed
|= BSS_CHANGED_P2P_PS
;
3476 * make sure we update all information, the CRC
3477 * mechanism doesn't look at P2P attributes.
3479 ifmgd
->beacon_crc_valid
= false;
3481 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3482 /* noa_attr not found and we had valid noa_attr before */
3483 sdata
->u
.mgd
.p2p_noa_index
= -1;
3484 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3485 changed
|= BSS_CHANGED_P2P_PS
;
3486 ifmgd
->beacon_crc_valid
= false;
3490 if (ifmgd
->csa_waiting_bcn
)
3491 ieee80211_chswitch_post_beacon(sdata
);
3494 * Update beacon timing and dtim count on every beacon appearance. This
3495 * will allow the driver to use the most updated values. Do it before
3496 * comparing this one with last received beacon.
3497 * IMPORTANT: These parameters would possibly be out of sync by the time
3498 * the driver will use them. The synchronized view is currently
3499 * guaranteed only in certain callbacks.
3501 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3502 sdata
->vif
.bss_conf
.sync_tsf
=
3503 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3504 sdata
->vif
.bss_conf
.sync_device_ts
=
3505 rx_status
->device_timestamp
;
3507 sdata
->vif
.bss_conf
.sync_dtim_count
=
3508 elems
.tim
->dtim_count
;
3510 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3513 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3515 ifmgd
->beacon_crc
= ncrc
;
3516 ifmgd
->beacon_crc_valid
= true;
3518 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3520 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
3521 rx_status
->device_timestamp
,
3524 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
3525 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3526 elems
.wmm_param_len
))
3527 changed
|= BSS_CHANGED_QOS
;
3530 * If we haven't had a beacon before, tell the driver about the
3531 * DTIM period (and beacon timing if desired) now.
3533 if (!ifmgd
->have_beacon
) {
3534 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3536 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3538 bss_conf
->dtim_period
= 1;
3540 changed
|= BSS_CHANGED_BEACON_INFO
;
3541 ifmgd
->have_beacon
= true;
3543 mutex_lock(&local
->iflist_mtx
);
3544 ieee80211_recalc_ps(local
);
3545 mutex_unlock(&local
->iflist_mtx
);
3547 ieee80211_recalc_ps_vif(sdata
);
3550 if (elems
.erp_info
) {
3552 erp_value
= elems
.erp_info
[0];
3556 changed
|= ieee80211_handle_bss_capability(sdata
,
3557 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3558 erp_valid
, erp_value
);
3560 mutex_lock(&local
->sta_mtx
);
3561 sta
= sta_info_get(sdata
, bssid
);
3563 if (ieee80211_config_bw(sdata
, sta
,
3564 elems
.ht_cap_elem
, elems
.ht_operation
,
3565 elems
.vht_operation
, bssid
, &changed
)) {
3566 mutex_unlock(&local
->sta_mtx
);
3567 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3568 WLAN_REASON_DEAUTH_LEAVING
,
3570 ieee80211_report_disconnect(sdata
, deauth_buf
,
3571 sizeof(deauth_buf
), true,
3572 WLAN_REASON_DEAUTH_LEAVING
);
3576 if (sta
&& elems
.opmode_notif
)
3577 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3578 rx_status
->band
, true);
3579 mutex_unlock(&local
->sta_mtx
);
3581 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
, mgmt
,
3583 elems
.country_elem_len
,
3584 elems
.pwr_constr_elem
,
3585 elems
.cisco_dtpc_elem
);
3587 ieee80211_bss_info_change_notify(sdata
, changed
);
3590 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3591 struct sk_buff
*skb
)
3593 struct ieee80211_rx_status
*rx_status
;
3594 struct ieee80211_mgmt
*mgmt
;
3596 struct ieee802_11_elems elems
;
3599 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3600 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3601 fc
= le16_to_cpu(mgmt
->frame_control
);
3605 switch (fc
& IEEE80211_FCTL_STYPE
) {
3606 case IEEE80211_STYPE_BEACON
:
3607 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3609 case IEEE80211_STYPE_PROBE_RESP
:
3610 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3612 case IEEE80211_STYPE_AUTH
:
3613 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3615 case IEEE80211_STYPE_DEAUTH
:
3616 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3618 case IEEE80211_STYPE_DISASSOC
:
3619 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3621 case IEEE80211_STYPE_ASSOC_RESP
:
3622 case IEEE80211_STYPE_REASSOC_RESP
:
3623 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3625 case IEEE80211_STYPE_ACTION
:
3626 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3627 ies_len
= skb
->len
-
3628 offsetof(struct ieee80211_mgmt
,
3629 u
.action
.u
.chan_switch
.variable
);
3634 ieee802_11_parse_elems(
3635 mgmt
->u
.action
.u
.chan_switch
.variable
,
3636 ies_len
, true, &elems
);
3638 if (elems
.parse_error
)
3641 ieee80211_sta_process_chanswitch(sdata
,
3643 rx_status
->device_timestamp
,
3645 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3646 ies_len
= skb
->len
-
3647 offsetof(struct ieee80211_mgmt
,
3648 u
.action
.u
.ext_chan_switch
.variable
);
3653 ieee802_11_parse_elems(
3654 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3655 ies_len
, true, &elems
);
3657 if (elems
.parse_error
)
3660 /* for the handling code pretend this was also an IE */
3661 elems
.ext_chansw_ie
=
3662 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3664 ieee80211_sta_process_chanswitch(sdata
,
3666 rx_status
->device_timestamp
,
3671 sdata_unlock(sdata
);
3674 static void ieee80211_sta_timer(unsigned long data
)
3676 struct ieee80211_sub_if_data
*sdata
=
3677 (struct ieee80211_sub_if_data
*) data
;
3679 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3682 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3683 u8
*bssid
, u8 reason
, bool tx
)
3685 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3687 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3690 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
3694 static int ieee80211_auth(struct ieee80211_sub_if_data
*sdata
)
3696 struct ieee80211_local
*local
= sdata
->local
;
3697 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3698 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3703 sdata_assert_lock(sdata
);
3705 if (WARN_ON_ONCE(!auth_data
))
3710 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3711 sdata_info(sdata
, "authentication with %pM timed out\n",
3712 auth_data
->bss
->bssid
);
3715 * Most likely AP is not in the range so remove the
3716 * bss struct for that AP.
3718 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3723 drv_mgd_prepare_tx(local
, sdata
);
3725 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3726 auth_data
->bss
->bssid
, auth_data
->tries
,
3727 IEEE80211_AUTH_MAX_TRIES
);
3729 auth_data
->expected_transaction
= 2;
3731 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3732 trans
= auth_data
->sae_trans
;
3733 status
= auth_data
->sae_status
;
3734 auth_data
->expected_transaction
= trans
;
3737 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3738 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3739 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3741 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3742 auth_data
->data
, auth_data
->data_len
,
3743 auth_data
->bss
->bssid
,
3744 auth_data
->bss
->bssid
, NULL
, 0, 0,
3747 if (tx_flags
== 0) {
3748 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3749 auth_data
->timeout_started
= true;
3750 run_again(sdata
, auth_data
->timeout
);
3752 auth_data
->timeout
=
3753 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3754 auth_data
->timeout_started
= true;
3755 run_again(sdata
, auth_data
->timeout
);
3761 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3763 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3764 struct ieee80211_local
*local
= sdata
->local
;
3766 sdata_assert_lock(sdata
);
3768 assoc_data
->tries
++;
3769 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3770 sdata_info(sdata
, "association with %pM timed out\n",
3771 assoc_data
->bss
->bssid
);
3774 * Most likely AP is not in the range so remove the
3775 * bss struct for that AP.
3777 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3782 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3783 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3784 IEEE80211_ASSOC_MAX_TRIES
);
3785 ieee80211_send_assoc(sdata
);
3787 if (!ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3788 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3789 assoc_data
->timeout_started
= true;
3790 run_again(sdata
, assoc_data
->timeout
);
3792 assoc_data
->timeout
=
3793 round_jiffies_up(jiffies
+
3794 IEEE80211_ASSOC_TIMEOUT_LONG
);
3795 assoc_data
->timeout_started
= true;
3796 run_again(sdata
, assoc_data
->timeout
);
3802 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3803 __le16 fc
, bool acked
)
3805 struct ieee80211_local
*local
= sdata
->local
;
3807 sdata
->u
.mgd
.status_fc
= fc
;
3808 sdata
->u
.mgd
.status_acked
= acked
;
3809 sdata
->u
.mgd
.status_received
= true;
3811 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3814 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3816 struct ieee80211_local
*local
= sdata
->local
;
3817 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3821 if (ifmgd
->status_received
) {
3822 __le16 fc
= ifmgd
->status_fc
;
3823 bool status_acked
= ifmgd
->status_acked
;
3825 ifmgd
->status_received
= false;
3826 if (ifmgd
->auth_data
&& ieee80211_is_auth(fc
)) {
3828 ifmgd
->auth_data
->timeout
=
3829 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3830 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3832 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3834 ifmgd
->auth_data
->timeout_started
= true;
3835 } else if (ifmgd
->assoc_data
&&
3836 (ieee80211_is_assoc_req(fc
) ||
3837 ieee80211_is_reassoc_req(fc
))) {
3839 ifmgd
->assoc_data
->timeout
=
3840 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3841 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3843 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3845 ifmgd
->assoc_data
->timeout_started
= true;
3849 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3850 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3851 if (ifmgd
->auth_data
->done
) {
3853 * ok ... we waited for assoc but userspace didn't,
3854 * so let's just kill the auth data
3856 ieee80211_destroy_auth_data(sdata
, false);
3857 } else if (ieee80211_auth(sdata
)) {
3859 struct ieee80211_event event
= {
3861 .u
.mlme
.data
= AUTH_EVENT
,
3862 .u
.mlme
.status
= MLME_TIMEOUT
,
3865 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3867 ieee80211_destroy_auth_data(sdata
, false);
3869 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3870 drv_event_callback(sdata
->local
, sdata
, &event
);
3872 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3873 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3875 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3876 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3877 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3878 ieee80211_do_assoc(sdata
)) {
3879 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3880 struct ieee80211_event event
= {
3882 .u
.mlme
.data
= ASSOC_EVENT
,
3883 .u
.mlme
.status
= MLME_TIMEOUT
,
3886 ieee80211_destroy_assoc_data(sdata
, false);
3887 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3888 drv_event_callback(sdata
->local
, sdata
, &event
);
3890 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3891 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3893 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3894 ifmgd
->associated
) {
3898 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3900 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3901 max_tries
= max_nullfunc_tries
;
3903 max_tries
= max_probe_tries
;
3905 /* ACK received for nullfunc probing frame */
3906 if (!ifmgd
->probe_send_count
)
3907 ieee80211_reset_ap_probe(sdata
);
3908 else if (ifmgd
->nullfunc_failed
) {
3909 if (ifmgd
->probe_send_count
< max_tries
) {
3911 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3912 bssid
, ifmgd
->probe_send_count
,
3914 ieee80211_mgd_probe_ap_send(sdata
);
3917 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3919 ieee80211_sta_connection_lost(sdata
, bssid
,
3920 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3923 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3924 run_again(sdata
, ifmgd
->probe_timeout
);
3925 else if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3927 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3928 bssid
, probe_wait_ms
);
3929 ieee80211_sta_connection_lost(sdata
, bssid
,
3930 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3931 } else if (ifmgd
->probe_send_count
< max_tries
) {
3933 "No probe response from AP %pM after %dms, try %d/%i\n",
3934 bssid
, probe_wait_ms
,
3935 ifmgd
->probe_send_count
, max_tries
);
3936 ieee80211_mgd_probe_ap_send(sdata
);
3939 * We actually lost the connection ... or did we?
3942 wiphy_debug(local
->hw
.wiphy
,
3943 "%s: No probe response from AP %pM"
3944 " after %dms, disconnecting.\n",
3946 bssid
, probe_wait_ms
);
3948 ieee80211_sta_connection_lost(sdata
, bssid
,
3949 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3953 sdata_unlock(sdata
);
3956 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3958 struct ieee80211_sub_if_data
*sdata
=
3959 (struct ieee80211_sub_if_data
*) data
;
3960 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3962 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3965 sdata
->u
.mgd
.connection_loss
= false;
3966 ieee80211_queue_work(&sdata
->local
->hw
,
3967 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3970 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3972 struct ieee80211_sub_if_data
*sdata
=
3973 (struct ieee80211_sub_if_data
*) data
;
3974 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3975 struct ieee80211_local
*local
= sdata
->local
;
3977 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3980 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3983 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3985 struct ieee80211_sub_if_data
*sdata
=
3986 container_of(work
, struct ieee80211_sub_if_data
,
3987 u
.mgd
.monitor_work
);
3989 ieee80211_mgd_probe_ap(sdata
, false);
3992 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3994 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3995 __ieee80211_stop_poll(sdata
);
3997 /* let's probe the connection once */
3998 if (!ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
3999 ieee80211_queue_work(&sdata
->local
->hw
,
4000 &sdata
->u
.mgd
.monitor_work
);
4001 /* and do all the other regular work too */
4002 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
4007 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data
*sdata
)
4009 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4010 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4014 if (ifmgd
->auth_data
|| ifmgd
->assoc_data
) {
4015 const u8
*bssid
= ifmgd
->auth_data
?
4016 ifmgd
->auth_data
->bss
->bssid
:
4017 ifmgd
->assoc_data
->bss
->bssid
;
4020 * If we are trying to authenticate / associate while suspending,
4021 * cfg80211 won't know and won't actually abort those attempts,
4022 * thus we need to do that ourselves.
4024 ieee80211_send_deauth_disassoc(sdata
, bssid
,
4025 IEEE80211_STYPE_DEAUTH
,
4026 WLAN_REASON_DEAUTH_LEAVING
,
4028 if (ifmgd
->assoc_data
)
4029 ieee80211_destroy_assoc_data(sdata
, false);
4030 if (ifmgd
->auth_data
)
4031 ieee80211_destroy_auth_data(sdata
, false);
4032 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4033 IEEE80211_DEAUTH_FRAME_LEN
);
4036 /* This is a bit of a hack - we should find a better and more generic
4037 * solution to this. Normally when suspending, cfg80211 will in fact
4038 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4039 * auth (not so important) or assoc (this is the problem) process.
4041 * As a consequence, it can happen that we are in the process of both
4042 * associating and suspending, and receive an association response
4043 * after cfg80211 has checked if it needs to disconnect, but before
4044 * we actually set the flag to drop incoming frames. This will then
4045 * cause the workqueue flush to process the association response in
4046 * the suspend, resulting in a successful association just before it
4047 * tries to remove the interface from the driver, which now though
4048 * has a channel context assigned ... this results in issues.
4050 * To work around this (for now) simply deauth here again if we're
4053 if (ifmgd
->associated
&& !sdata
->local
->wowlan
) {
4055 struct cfg80211_deauth_request req
= {
4056 .reason_code
= WLAN_REASON_DEAUTH_LEAVING
,
4060 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
4061 ieee80211_mgd_deauth(sdata
, &req
);
4064 sdata_unlock(sdata
);
4067 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
4069 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4072 if (!ifmgd
->associated
) {
4073 sdata_unlock(sdata
);
4077 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
4078 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
4079 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
4080 ieee80211_sta_connection_lost(sdata
,
4081 ifmgd
->associated
->bssid
,
4082 WLAN_REASON_UNSPECIFIED
,
4084 sdata_unlock(sdata
);
4087 sdata_unlock(sdata
);
4091 /* interface setup */
4092 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
4094 struct ieee80211_if_managed
*ifmgd
;
4096 ifmgd
= &sdata
->u
.mgd
;
4097 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
4098 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
4099 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
4100 ieee80211_beacon_connection_loss_work
);
4101 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
4102 ieee80211_csa_connection_drop_work
);
4103 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
4104 INIT_DELAYED_WORK(&ifmgd
->tdls_peer_del_work
,
4105 ieee80211_tdls_peer_del_work
);
4106 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
4107 (unsigned long) sdata
);
4108 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
4109 (unsigned long) sdata
);
4110 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
4111 (unsigned long) sdata
);
4112 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
4113 (unsigned long) sdata
);
4114 INIT_DELAYED_WORK(&ifmgd
->tx_tspec_wk
,
4115 ieee80211_sta_handle_tspec_ac_params_wk
);
4118 ifmgd
->powersave
= sdata
->wdev
.ps
;
4119 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
4120 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
4121 ifmgd
->p2p_noa_index
= -1;
4123 if (sdata
->local
->hw
.wiphy
->features
& NL80211_FEATURE_DYNAMIC_SMPS
)
4124 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
4126 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
4128 /* Setup TDLS data */
4129 spin_lock_init(&ifmgd
->teardown_lock
);
4130 ifmgd
->teardown_skb
= NULL
;
4131 ifmgd
->orig_teardown_skb
= NULL
;
4134 /* scan finished notification */
4135 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
4137 struct ieee80211_sub_if_data
*sdata
;
4139 /* Restart STA timers */
4141 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4142 if (ieee80211_sdata_running(sdata
))
4143 ieee80211_restart_sta_timer(sdata
);
4148 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
4149 struct cfg80211_bss
*cbss
)
4151 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4152 const u8
*ht_cap_ie
, *vht_cap_ie
;
4153 const struct ieee80211_ht_cap
*ht_cap
;
4154 const struct ieee80211_vht_cap
*vht_cap
;
4157 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
4160 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4161 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
4162 ht_cap
= (void *)(ht_cap_ie
+ 2);
4163 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
4165 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4166 * "Tx Unequal Modulation Supported" fields.
4170 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
4173 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4174 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
4178 vht_cap
= (void *)(vht_cap_ie
+ 2);
4179 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
4180 for (nss
= 8; nss
> 0; nss
--) {
4181 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
4182 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
4185 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4186 chains
= max(chains
, nss
);
4192 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
4193 struct cfg80211_bss
*cbss
)
4195 struct ieee80211_local
*local
= sdata
->local
;
4196 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4197 const struct ieee80211_ht_cap
*ht_cap
= NULL
;
4198 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
4199 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
4200 struct ieee80211_supported_band
*sband
;
4201 struct cfg80211_chan_def chandef
;
4206 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4208 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
4209 IEEE80211_STA_DISABLE_80P80MHZ
|
4210 IEEE80211_STA_DISABLE_160MHZ
);
4214 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
4215 sband
->ht_cap
.ht_supported
) {
4216 const u8
*ht_oper_ie
, *ht_cap_ie
;
4218 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
4219 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
4220 ht_oper
= (void *)(ht_oper_ie
+ 2);
4222 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4223 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
))
4224 ht_cap
= (void *)(ht_cap_ie
+ 2);
4227 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4232 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4233 sband
->vht_cap
.vht_supported
) {
4234 const u8
*vht_oper_ie
, *vht_cap
;
4236 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
4237 WLAN_EID_VHT_OPERATION
);
4238 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
4239 vht_oper
= (void *)(vht_oper_ie
+ 2);
4240 if (vht_oper
&& !ht_oper
) {
4243 "AP advertised VHT without HT, disabling both\n");
4244 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4245 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4248 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4249 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
4250 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4255 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4257 for (i
= 0; i
< sband
->n_channels
; i
++) {
4258 if (sband
->channels
[i
].flags
& (IEEE80211_CHAN_DISABLED
|
4259 IEEE80211_CHAN_NO_80MHZ
))
4267 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4269 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
4271 ht_cap
, ht_oper
, vht_oper
,
4274 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
4279 /* will change later if needed */
4280 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4282 mutex_lock(&local
->mtx
);
4284 * If this fails (possibly due to channel context sharing
4285 * on incompatible channels, e.g. 80+80 and 160 sharing the
4286 * same control channel) try to use a smaller bandwidth.
4288 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4289 IEEE80211_CHANCTX_SHARED
);
4291 /* don't downgrade for 5 and 10 MHz channels, though. */
4292 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
4293 chandef
.width
== NL80211_CHAN_WIDTH_10
)
4296 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
4297 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
4298 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4299 IEEE80211_CHANCTX_SHARED
);
4302 mutex_unlock(&local
->mtx
);
4306 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
4307 struct cfg80211_bss
*cbss
, bool assoc
,
4310 struct ieee80211_local
*local
= sdata
->local
;
4311 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4312 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
4313 struct sta_info
*new_sta
= NULL
;
4314 struct ieee80211_supported_band
*sband
;
4315 bool have_sta
= false;
4318 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4320 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
4325 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
4330 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
4335 if (new_sta
|| override
) {
4336 err
= ieee80211_prep_channel(sdata
, cbss
);
4339 sta_info_free(local
, new_sta
);
4345 u32 rates
= 0, basic_rates
= 0;
4346 bool have_higher_than_11mbit
;
4347 int min_rate
= INT_MAX
, min_rate_index
= -1;
4348 struct ieee80211_chanctx_conf
*chanctx_conf
;
4349 const struct cfg80211_bss_ies
*ies
;
4350 int shift
= ieee80211_vif_get_shift(&sdata
->vif
);
4354 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4355 if (WARN_ON(!chanctx_conf
)) {
4357 sta_info_free(local
, new_sta
);
4360 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
4363 ieee80211_get_rates(sband
, bss
->supp_rates
,
4364 bss
->supp_rates_len
,
4365 &rates
, &basic_rates
,
4366 &have_higher_than_11mbit
,
4367 &min_rate
, &min_rate_index
,
4371 * This used to be a workaround for basic rates missing
4372 * in the association response frame. Now that we no
4373 * longer use the basic rates from there, it probably
4374 * doesn't happen any more, but keep the workaround so
4375 * in case some *other* APs are buggy in different ways
4376 * we can connect -- with a warning.
4378 if (!basic_rates
&& min_rate_index
>= 0) {
4380 "No basic rates, using min rate instead\n");
4381 basic_rates
= BIT(min_rate_index
);
4384 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
4385 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
4387 /* cf. IEEE 802.11 9.2.12 */
4388 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
4389 have_higher_than_11mbit
)
4390 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
4392 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
4394 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
4396 /* set timing information */
4397 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
4399 ies
= rcu_dereference(cbss
->beacon_ies
);
4403 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4404 sdata
->vif
.bss_conf
.sync_device_ts
=
4405 bss
->device_ts_beacon
;
4406 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4407 ies
->data
, ies
->len
);
4408 if (tim_ie
&& tim_ie
[1] >= 2)
4409 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
4411 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4412 } else if (!ieee80211_hw_check(&sdata
->local
->hw
,
4413 TIMING_BEACON_ONLY
)) {
4414 ies
= rcu_dereference(cbss
->proberesp_ies
);
4415 /* must be non-NULL since beacon IEs were NULL */
4416 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4417 sdata
->vif
.bss_conf
.sync_device_ts
=
4418 bss
->device_ts_presp
;
4419 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4421 sdata
->vif
.bss_conf
.sync_tsf
= 0;
4422 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
4423 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4427 /* tell driver about BSSID, basic rates and timing */
4428 ieee80211_bss_info_change_notify(sdata
,
4429 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
4430 BSS_CHANGED_BEACON_INT
);
4433 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
4435 err
= sta_info_insert(new_sta
);
4439 "failed to insert STA entry for the AP (error %d)\n",
4444 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4446 /* Cancel scan to ensure that nothing interferes with connection */
4447 if (local
->scanning
)
4448 ieee80211_scan_cancel(local
);
4454 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4455 struct cfg80211_auth_request
*req
)
4457 struct ieee80211_local
*local
= sdata
->local
;
4458 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4459 struct ieee80211_mgd_auth_data
*auth_data
;
4463 /* prepare auth data structure */
4465 switch (req
->auth_type
) {
4466 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4467 auth_alg
= WLAN_AUTH_OPEN
;
4469 case NL80211_AUTHTYPE_SHARED_KEY
:
4470 if (IS_ERR(local
->wep_tx_tfm
))
4472 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4474 case NL80211_AUTHTYPE_FT
:
4475 auth_alg
= WLAN_AUTH_FT
;
4477 case NL80211_AUTHTYPE_NETWORK_EAP
:
4478 auth_alg
= WLAN_AUTH_LEAP
;
4480 case NL80211_AUTHTYPE_SAE
:
4481 auth_alg
= WLAN_AUTH_SAE
;
4487 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4488 req
->ie_len
, GFP_KERNEL
);
4492 auth_data
->bss
= req
->bss
;
4494 if (req
->sae_data_len
>= 4) {
4495 __le16
*pos
= (__le16
*) req
->sae_data
;
4496 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4497 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4498 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4499 req
->sae_data_len
- 4);
4500 auth_data
->data_len
+= req
->sae_data_len
- 4;
4503 if (req
->ie
&& req
->ie_len
) {
4504 memcpy(&auth_data
->data
[auth_data
->data_len
],
4505 req
->ie
, req
->ie_len
);
4506 auth_data
->data_len
+= req
->ie_len
;
4509 if (req
->key
&& req
->key_len
) {
4510 auth_data
->key_len
= req
->key_len
;
4511 auth_data
->key_idx
= req
->key_idx
;
4512 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4515 auth_data
->algorithm
= auth_alg
;
4517 /* try to authenticate/probe */
4519 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4520 ifmgd
->assoc_data
) {
4525 if (ifmgd
->auth_data
)
4526 ieee80211_destroy_auth_data(sdata
, false);
4528 /* prep auth_data so we don't go into idle on disassoc */
4529 ifmgd
->auth_data
= auth_data
;
4531 if (ifmgd
->associated
) {
4532 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4534 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4535 WLAN_REASON_UNSPECIFIED
,
4538 ieee80211_report_disconnect(sdata
, frame_buf
,
4539 sizeof(frame_buf
), true,
4540 WLAN_REASON_UNSPECIFIED
);
4543 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4545 err
= ieee80211_prep_connection(sdata
, req
->bss
, false, false);
4549 err
= ieee80211_auth(sdata
);
4551 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4555 /* hold our own reference */
4556 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4560 eth_zero_addr(ifmgd
->bssid
);
4561 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4562 ifmgd
->auth_data
= NULL
;
4563 mutex_lock(&sdata
->local
->mtx
);
4564 ieee80211_vif_release_channel(sdata
);
4565 mutex_unlock(&sdata
->local
->mtx
);
4571 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4572 struct cfg80211_assoc_request
*req
)
4574 struct ieee80211_local
*local
= sdata
->local
;
4575 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4576 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4577 struct ieee80211_mgd_assoc_data
*assoc_data
;
4578 const struct cfg80211_bss_ies
*beacon_ies
;
4579 struct ieee80211_supported_band
*sband
;
4580 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4582 bool override
= false;
4584 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4589 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4595 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4596 assoc_data
->ssid_len
= ssidie
[1];
4599 if (ifmgd
->associated
) {
4600 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4602 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4603 WLAN_REASON_UNSPECIFIED
,
4606 ieee80211_report_disconnect(sdata
, frame_buf
,
4607 sizeof(frame_buf
), true,
4608 WLAN_REASON_UNSPECIFIED
);
4611 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4616 if (ifmgd
->assoc_data
) {
4621 if (ifmgd
->auth_data
) {
4624 /* keep sta info, bssid if matching */
4625 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4626 ieee80211_destroy_auth_data(sdata
, match
);
4629 /* prepare assoc data */
4631 ifmgd
->beacon_crc_valid
= false;
4633 assoc_data
->wmm
= bss
->wmm_used
&&
4634 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4637 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4638 * We still associate in non-HT mode (11a/b/g) if any one of these
4639 * ciphers is configured as pairwise.
4640 * We can set this to true for non-11n hardware, that'll be checked
4641 * separately along with the peer capabilities.
4643 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4644 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4645 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4646 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4647 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4648 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4649 netdev_info(sdata
->dev
,
4650 "disabling HT/VHT due to WEP/TKIP use\n");
4654 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4655 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4656 if (!sband
->ht_cap
.ht_supported
||
4657 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4658 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4659 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4660 if (!bss
->wmm_used
&&
4661 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4662 netdev_info(sdata
->dev
,
4663 "disabling HT as WMM/QoS is not supported by the AP\n");
4666 /* disable VHT if we don't support it or the AP doesn't use WMM */
4667 if (!sband
->vht_cap
.vht_supported
||
4668 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4669 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4670 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4671 if (!bss
->wmm_used
&&
4672 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4673 netdev_info(sdata
->dev
,
4674 "disabling VHT as WMM/QoS is not supported by the AP\n");
4677 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4678 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4679 sizeof(ifmgd
->ht_capa_mask
));
4681 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4682 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4683 sizeof(ifmgd
->vht_capa_mask
));
4685 if (req
->ie
&& req
->ie_len
) {
4686 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4687 assoc_data
->ie_len
= req
->ie_len
;
4690 assoc_data
->bss
= req
->bss
;
4692 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4693 if (ifmgd
->powersave
)
4694 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4696 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4698 sdata
->smps_mode
= ifmgd
->req_smps
;
4700 assoc_data
->capability
= req
->bss
->capability
;
4701 assoc_data
->supp_rates
= bss
->supp_rates
;
4702 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4705 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4706 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4707 assoc_data
->ap_ht_param
=
4708 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4710 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4711 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4712 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4713 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4714 sizeof(struct ieee80211_vht_cap
));
4716 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4719 if (WARN((sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
) &&
4720 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
),
4721 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4722 sdata
->vif
.driver_flags
&= ~IEEE80211_VIF_SUPPORTS_UAPSD
;
4724 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4725 (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
)) {
4726 assoc_data
->uapsd
= true;
4727 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4729 assoc_data
->uapsd
= false;
4730 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4733 if (req
->prev_bssid
)
4734 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4737 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4738 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4740 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4741 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4744 if (req
->flags
& ASSOC_REQ_USE_RRM
)
4745 ifmgd
->flags
|= IEEE80211_STA_ENABLE_RRM
;
4747 ifmgd
->flags
&= ~IEEE80211_STA_ENABLE_RRM
;
4749 if (req
->crypto
.control_port
)
4750 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4752 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4754 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4755 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4756 sdata
->encrypt_headroom
= ieee80211_cs_headroom(local
, &req
->crypto
,
4759 /* kick off associate process */
4761 ifmgd
->assoc_data
= assoc_data
;
4762 ifmgd
->dtim_period
= 0;
4763 ifmgd
->have_beacon
= false;
4765 /* override HT/VHT configuration only if the AP and we support it */
4766 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
4767 struct ieee80211_sta_ht_cap sta_ht_cap
;
4769 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
4772 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
4773 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
4775 /* check for 40 MHz disable override */
4776 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
) &&
4777 sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
4778 !(sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
4781 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4782 req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4786 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4787 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4788 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4791 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4792 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4794 err
= ieee80211_prep_connection(sdata
, req
->bss
, true, override
);
4799 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4801 if (ieee80211_hw_check(&sdata
->local
->hw
, NEED_DTIM_BEFORE_ASSOC
) &&
4804 * Wait up to one beacon interval ...
4805 * should this be more if we miss one?
4807 sdata_info(sdata
, "waiting for beacon from %pM\n",
4809 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4810 assoc_data
->timeout_started
= true;
4811 assoc_data
->need_beacon
= true;
4812 } else if (beacon_ies
) {
4813 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4818 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4819 const struct ieee80211_tim_ie
*tim
;
4820 tim
= (void *)(tim_ie
+ 2);
4821 ifmgd
->dtim_period
= tim
->dtim_period
;
4822 dtim_count
= tim
->dtim_count
;
4824 ifmgd
->have_beacon
= true;
4825 assoc_data
->timeout
= jiffies
;
4826 assoc_data
->timeout_started
= true;
4828 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
4829 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4830 sdata
->vif
.bss_conf
.sync_device_ts
=
4831 bss
->device_ts_beacon
;
4832 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4835 assoc_data
->timeout
= jiffies
;
4836 assoc_data
->timeout_started
= true;
4840 run_again(sdata
, assoc_data
->timeout
);
4842 if (bss
->corrupt_data
) {
4843 char *corrupt_type
= "data";
4844 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4845 if (bss
->corrupt_data
&
4846 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4847 corrupt_type
= "beacon and probe response";
4849 corrupt_type
= "beacon";
4850 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4851 corrupt_type
= "probe response";
4852 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4858 eth_zero_addr(ifmgd
->bssid
);
4859 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4860 ifmgd
->assoc_data
= NULL
;
4866 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4867 struct cfg80211_deauth_request
*req
)
4869 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4870 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4871 bool tx
= !req
->local_state_change
;
4873 if (ifmgd
->auth_data
&&
4874 ether_addr_equal(ifmgd
->auth_data
->bss
->bssid
, req
->bssid
)) {
4876 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4877 req
->bssid
, req
->reason_code
,
4878 ieee80211_get_reason_code_string(req
->reason_code
));
4880 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4881 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4882 IEEE80211_STYPE_DEAUTH
,
4883 req
->reason_code
, tx
,
4885 ieee80211_destroy_auth_data(sdata
, false);
4886 ieee80211_report_disconnect(sdata
, frame_buf
,
4887 sizeof(frame_buf
), true,
4893 if (ifmgd
->assoc_data
&&
4894 ether_addr_equal(ifmgd
->assoc_data
->bss
->bssid
, req
->bssid
)) {
4896 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4897 req
->bssid
, req
->reason_code
,
4898 ieee80211_get_reason_code_string(req
->reason_code
));
4900 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4901 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4902 IEEE80211_STYPE_DEAUTH
,
4903 req
->reason_code
, tx
,
4905 ieee80211_destroy_assoc_data(sdata
, false);
4906 ieee80211_report_disconnect(sdata
, frame_buf
,
4907 sizeof(frame_buf
), true,
4912 if (ifmgd
->associated
&&
4913 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4915 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4916 req
->bssid
, req
->reason_code
,
4917 ieee80211_get_reason_code_string(req
->reason_code
));
4919 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4920 req
->reason_code
, tx
, frame_buf
);
4921 ieee80211_report_disconnect(sdata
, frame_buf
,
4922 sizeof(frame_buf
), true,
4930 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4931 struct cfg80211_disassoc_request
*req
)
4933 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4935 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4938 * cfg80211 should catch this ... but it's racy since
4939 * we can receive a disassoc frame, process it, hand it
4940 * to cfg80211 while that's in a locked section already
4941 * trying to tell us that the user wants to disconnect.
4943 if (ifmgd
->associated
!= req
->bss
)
4947 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4948 req
->bss
->bssid
, req
->reason_code
, ieee80211_get_reason_code_string(req
->reason_code
));
4950 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4951 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4952 req
->reason_code
, !req
->local_state_change
,
4955 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
4961 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4963 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4966 * Make sure some work items will not run after this,
4967 * they will not do anything but might not have been
4968 * cancelled when disconnecting.
4970 cancel_work_sync(&ifmgd
->monitor_work
);
4971 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4972 cancel_work_sync(&ifmgd
->request_smps_work
);
4973 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4974 cancel_work_sync(&ifmgd
->chswitch_work
);
4975 cancel_delayed_work_sync(&ifmgd
->tdls_peer_del_work
);
4978 if (ifmgd
->assoc_data
) {
4979 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
4980 ieee80211_destroy_assoc_data(sdata
, false);
4981 cfg80211_assoc_timeout(sdata
->dev
, bss
);
4983 if (ifmgd
->auth_data
)
4984 ieee80211_destroy_auth_data(sdata
, false);
4985 spin_lock_bh(&ifmgd
->teardown_lock
);
4986 if (ifmgd
->teardown_skb
) {
4987 kfree_skb(ifmgd
->teardown_skb
);
4988 ifmgd
->teardown_skb
= NULL
;
4989 ifmgd
->orig_teardown_skb
= NULL
;
4991 spin_unlock_bh(&ifmgd
->teardown_lock
);
4992 del_timer_sync(&ifmgd
->timer
);
4993 sdata_unlock(sdata
);
4996 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4997 enum nl80211_cqm_rssi_threshold_event rssi_event
,
5000 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
5002 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
5004 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
5006 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
5008 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif
*vif
, gfp_t gfp
)
5010 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
5012 trace_api_cqm_beacon_loss_notify(sdata
->local
, sdata
);
5014 cfg80211_cqm_beacon_loss_notify(sdata
->dev
, gfp
);
5016 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify
);