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 - 2016 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(!ifmgd
->associated
))
128 if (ifmgd
->probe_send_count
)
129 ifmgd
->probe_send_count
= 0;
131 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
134 mod_timer(&ifmgd
->conn_mon_timer
,
135 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
138 static int ecw2cw(int ecw
)
140 return (1 << ecw
) - 1;
144 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
145 struct ieee80211_supported_band
*sband
,
146 struct ieee80211_channel
*channel
,
147 const struct ieee80211_ht_cap
*ht_cap
,
148 const struct ieee80211_ht_operation
*ht_oper
,
149 const struct ieee80211_vht_operation
*vht_oper
,
150 struct cfg80211_chan_def
*chandef
, bool tracking
)
152 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
153 struct cfg80211_chan_def vht_chandef
;
154 struct ieee80211_sta_ht_cap sta_ht_cap
;
157 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
158 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
160 chandef
->chan
= channel
;
161 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
162 chandef
->center_freq1
= channel
->center_freq
;
163 chandef
->center_freq2
= 0;
165 if (!ht_cap
|| !ht_oper
|| !sta_ht_cap
.ht_supported
) {
166 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
170 chandef
->width
= NL80211_CHAN_WIDTH_20
;
172 if (!(ht_cap
->cap_info
&
173 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
))) {
174 ret
= IEEE80211_STA_DISABLE_40MHZ
;
175 vht_chandef
= *chandef
;
179 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
181 /* check that channel matches the right operating channel */
182 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
184 * It's possible that some APs are confused here;
185 * Netgear WNDR3700 sometimes reports 4 higher than
186 * the actual channel in association responses, but
187 * since we look at probe response/beacon data here
191 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
192 channel
->center_freq
, ht_cfreq
,
193 ht_oper
->primary_chan
, channel
->band
);
194 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
198 /* check 40 MHz support, if we have it */
199 if (sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
200 ieee80211_chandef_ht_oper(ht_oper
, chandef
);
202 /* 40 MHz (and 80 MHz) must be supported for VHT */
203 ret
= IEEE80211_STA_DISABLE_VHT
;
204 /* also mark 40 MHz disabled */
205 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
209 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
210 ret
= IEEE80211_STA_DISABLE_VHT
;
214 vht_chandef
= *chandef
;
215 if (!ieee80211_chandef_vht_oper(vht_oper
, &vht_chandef
)) {
216 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
218 "AP VHT information is invalid, disable VHT\n");
219 ret
= IEEE80211_STA_DISABLE_VHT
;
223 if (!cfg80211_chandef_valid(&vht_chandef
)) {
224 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
226 "AP VHT information is invalid, disable VHT\n");
227 ret
= IEEE80211_STA_DISABLE_VHT
;
231 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
236 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
237 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
239 "AP VHT information doesn't match HT, disable VHT\n");
240 ret
= IEEE80211_STA_DISABLE_VHT
;
244 *chandef
= vht_chandef
;
250 * When tracking the current AP, don't do any further checks if the
251 * new chandef is identical to the one we're currently using for the
252 * connection. This keeps us from playing ping-pong with regulatory,
253 * without it the following can happen (for example):
254 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
255 * - AP advertises regdom US
256 * - CRDA loads regdom US with 80 MHz prohibited (old database)
257 * - the code below detects an unsupported channel, downgrades, and
258 * we disconnect from the AP in the caller
259 * - disconnect causes CRDA to reload world regdomain and the game
261 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
263 * It seems possible that there are still scenarios with CSA or real
264 * bandwidth changes where a this could happen, but those cases are
265 * less common and wouldn't completely prevent using the AP.
268 cfg80211_chandef_identical(chandef
, &sdata
->vif
.bss_conf
.chandef
))
271 /* don't print the message below for VHT mismatch if VHT is disabled */
272 if (ret
& IEEE80211_STA_DISABLE_VHT
)
273 vht_chandef
= *chandef
;
276 * Ignore the DISABLED flag when we're already connected and only
277 * tracking the APs beacon for bandwidth changes - otherwise we
278 * might get disconnected here if we connect to an AP, update our
279 * regulatory information based on the AP's country IE and the
280 * information we have is wrong/outdated and disables the channel
281 * that we're actually using for the connection to the AP.
283 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
285 IEEE80211_CHAN_DISABLED
)) {
286 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
287 ret
= IEEE80211_STA_DISABLE_HT
|
288 IEEE80211_STA_DISABLE_VHT
;
292 ret
|= ieee80211_chandef_downgrade(chandef
);
295 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
297 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
299 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
303 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
304 struct sta_info
*sta
,
305 const struct ieee80211_ht_cap
*ht_cap
,
306 const struct ieee80211_ht_operation
*ht_oper
,
307 const struct ieee80211_vht_operation
*vht_oper
,
308 const u8
*bssid
, u32
*changed
)
310 struct ieee80211_local
*local
= sdata
->local
;
311 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
312 struct ieee80211_supported_band
*sband
;
313 struct ieee80211_channel
*chan
;
314 struct cfg80211_chan_def chandef
;
317 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
320 /* if HT was/is disabled, don't track any bandwidth changes */
321 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
324 /* don't check VHT if we associated as non-VHT station */
325 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
328 if (WARN_ON_ONCE(!sta
))
332 * if bss configuration changed store the new one -
333 * this may be applicable even if channel is identical
335 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
336 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
337 *changed
|= BSS_CHANGED_HT
;
338 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
341 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
342 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
344 /* calculate new channel (type) based on HT/VHT operation IEs */
345 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
,
346 ht_cap
, ht_oper
, vht_oper
,
350 * Downgrade the new channel if we associated with restricted
351 * capabilities. For example, if we associated as a 20 MHz STA
352 * to a 40 MHz AP (due to regulatory, capabilities or config
353 * reasons) then switching to a 40 MHz channel now won't do us
354 * any good -- we couldn't use it with the AP.
356 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
357 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
358 flags
|= ieee80211_chandef_downgrade(&chandef
);
359 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
360 chandef
.width
== NL80211_CHAN_WIDTH_160
)
361 flags
|= ieee80211_chandef_downgrade(&chandef
);
362 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
363 chandef
.width
> NL80211_CHAN_WIDTH_20
)
364 flags
|= ieee80211_chandef_downgrade(&chandef
);
366 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
370 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
371 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
372 chandef
.center_freq1
, chandef
.center_freq2
);
374 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
375 IEEE80211_STA_DISABLE_VHT
|
376 IEEE80211_STA_DISABLE_40MHZ
|
377 IEEE80211_STA_DISABLE_80P80MHZ
|
378 IEEE80211_STA_DISABLE_160MHZ
)) ||
379 !cfg80211_chandef_valid(&chandef
)) {
381 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
386 switch (chandef
.width
) {
387 case NL80211_CHAN_WIDTH_20_NOHT
:
388 case NL80211_CHAN_WIDTH_20
:
389 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
391 case NL80211_CHAN_WIDTH_40
:
392 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
394 case NL80211_CHAN_WIDTH_80
:
395 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
397 case NL80211_CHAN_WIDTH_80P80
:
398 case NL80211_CHAN_WIDTH_160
:
399 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
405 if (new_sta_bw
> sta
->cur_max_bandwidth
)
406 new_sta_bw
= sta
->cur_max_bandwidth
;
408 if (new_sta_bw
< sta
->sta
.bandwidth
) {
409 sta
->sta
.bandwidth
= new_sta_bw
;
410 rate_control_rate_update(local
, sband
, sta
,
411 IEEE80211_RC_BW_CHANGED
);
414 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
417 "AP %pM changed bandwidth to incompatible one - disconnect\n",
422 if (new_sta_bw
> sta
->sta
.bandwidth
) {
423 sta
->sta
.bandwidth
= new_sta_bw
;
424 rate_control_rate_update(local
, sband
, sta
,
425 IEEE80211_RC_BW_CHANGED
);
431 /* frame sending functions */
433 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
434 struct sk_buff
*skb
, u8 ap_ht_param
,
435 struct ieee80211_supported_band
*sband
,
436 struct ieee80211_channel
*channel
,
437 enum ieee80211_smps_mode smps
)
440 u32 flags
= channel
->flags
;
442 struct ieee80211_sta_ht_cap ht_cap
;
444 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
446 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
447 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
449 /* determine capability flags */
452 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
453 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
454 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
455 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
456 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
459 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
460 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
461 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
462 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
468 * If 40 MHz was disabled associate as though we weren't
469 * capable of 40 MHz -- some broken APs will never fall
470 * back to trying to transmit in 20 MHz.
472 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
473 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
474 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
477 /* set SM PS mode properly */
478 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
480 case IEEE80211_SMPS_AUTOMATIC
:
481 case IEEE80211_SMPS_NUM_MODES
:
483 case IEEE80211_SMPS_OFF
:
484 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
485 IEEE80211_HT_CAP_SM_PS_SHIFT
;
487 case IEEE80211_SMPS_STATIC
:
488 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
489 IEEE80211_HT_CAP_SM_PS_SHIFT
;
491 case IEEE80211_SMPS_DYNAMIC
:
492 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
493 IEEE80211_HT_CAP_SM_PS_SHIFT
;
497 /* reserve and fill IE */
498 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
499 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
502 /* This function determines vht capability flags for the association
504 * Note - the function may set the owner of the MU-MIMO capability
506 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
508 struct ieee80211_supported_band
*sband
,
509 struct ieee80211_vht_cap
*ap_vht_cap
)
511 struct ieee80211_local
*local
= sdata
->local
;
514 struct ieee80211_sta_vht_cap vht_cap
;
515 u32 mask
, ap_bf_sts
, our_bf_sts
;
517 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
519 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
520 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
522 /* determine capability flags */
525 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
526 u32 bw
= cap
& IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
528 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
529 if (bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
||
530 bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
)
531 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
534 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
535 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
536 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
540 * Some APs apparently get confused if our capabilities are better
541 * than theirs, so restrict what we advertise in the assoc request.
543 if (!(ap_vht_cap
->vht_cap_info
&
544 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
545 cap
&= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
|
546 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
);
547 else if (!(ap_vht_cap
->vht_cap_info
&
548 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE
)))
549 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
552 * If some other vif is using the MU-MIMO capablity we cannot associate
553 * using MU-MIMO - this will lead to contradictions in the group-id
555 * Ownership is defined since association request, in order to avoid
556 * simultaneous associations with MU-MIMO.
558 if (cap
& IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
) {
559 bool disable_mu_mimo
= false;
560 struct ieee80211_sub_if_data
*other
;
562 list_for_each_entry_rcu(other
, &local
->interfaces
, list
) {
563 if (other
->vif
.mu_mimo_owner
) {
564 disable_mu_mimo
= true;
569 cap
&= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE
;
571 sdata
->vif
.mu_mimo_owner
= true;
574 mask
= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK
;
576 ap_bf_sts
= le32_to_cpu(ap_vht_cap
->vht_cap_info
) & mask
;
577 our_bf_sts
= cap
& mask
;
579 if (ap_bf_sts
< our_bf_sts
) {
584 /* reserve and fill IE */
585 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
586 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
589 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
591 struct ieee80211_local
*local
= sdata
->local
;
592 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
593 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
595 struct ieee80211_mgmt
*mgmt
;
597 size_t offset
= 0, noffset
;
598 int i
, count
, rates_len
, supp_rates_len
, shift
;
600 struct ieee80211_supported_band
*sband
;
601 struct ieee80211_chanctx_conf
*chanctx_conf
;
602 struct ieee80211_channel
*chan
;
603 u32 rate_flags
, rates
= 0;
605 sdata_assert_lock(sdata
);
608 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
609 if (WARN_ON(!chanctx_conf
)) {
613 chan
= chanctx_conf
->def
.chan
;
614 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
616 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
617 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
619 if (assoc_data
->supp_rates_len
) {
621 * Get all rates supported by the device and the AP as
622 * some APs don't like getting a superset of their rates
623 * in the association request (e.g. D-Link DAP 1353 in
626 rates_len
= ieee80211_parse_bitrates(&chanctx_conf
->def
, sband
,
627 assoc_data
->supp_rates
,
628 assoc_data
->supp_rates_len
,
632 * In case AP not provide any supported rates information
633 * before association, we send information element(s) with
634 * all rates that we support.
637 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
638 if ((rate_flags
& sband
->bitrates
[i
].flags
)
646 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
647 sizeof(*mgmt
) + /* bit too much but doesn't matter */
648 2 + assoc_data
->ssid_len
+ /* SSID */
649 4 + rates_len
+ /* (extended) rates */
650 4 + /* power capability */
651 2 + 2 * sband
->n_channels
+ /* supported channels */
652 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
653 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
654 assoc_data
->ie_len
+ /* extra IEs */
660 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
662 capab
= WLAN_CAPABILITY_ESS
;
664 if (sband
->band
== NL80211_BAND_2GHZ
) {
665 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
666 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
669 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
670 capab
|= WLAN_CAPABILITY_PRIVACY
;
672 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
673 ieee80211_hw_check(&local
->hw
, SPECTRUM_MGMT
))
674 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
676 if (ifmgd
->flags
& IEEE80211_STA_ENABLE_RRM
)
677 capab
|= WLAN_CAPABILITY_RADIO_MEASURE
;
679 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
681 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
682 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
683 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
685 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
687 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
688 IEEE80211_STYPE_REASSOC_REQ
);
689 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
690 mgmt
->u
.reassoc_req
.listen_interval
=
691 cpu_to_le16(local
->hw
.conf
.listen_interval
);
692 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
696 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
697 IEEE80211_STYPE_ASSOC_REQ
);
698 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
699 mgmt
->u
.assoc_req
.listen_interval
=
700 cpu_to_le16(local
->hw
.conf
.listen_interval
);
704 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
705 *pos
++ = WLAN_EID_SSID
;
706 *pos
++ = assoc_data
->ssid_len
;
707 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
709 /* add all rates which were marked to be used above */
710 supp_rates_len
= rates_len
;
711 if (supp_rates_len
> 8)
714 pos
= skb_put(skb
, supp_rates_len
+ 2);
715 *pos
++ = WLAN_EID_SUPP_RATES
;
716 *pos
++ = supp_rates_len
;
719 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
720 if (BIT(i
) & rates
) {
721 int rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
729 if (rates_len
> count
) {
730 pos
= skb_put(skb
, rates_len
- count
+ 2);
731 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
732 *pos
++ = rates_len
- count
;
734 for (i
++; i
< sband
->n_bitrates
; i
++) {
735 if (BIT(i
) & rates
) {
737 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
744 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
||
745 capab
& WLAN_CAPABILITY_RADIO_MEASURE
) {
746 pos
= skb_put(skb
, 4);
747 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
749 *pos
++ = 0; /* min tx power */
751 *pos
++ = ieee80211_chandef_max_power(&chanctx_conf
->def
);
754 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
755 /* TODO: get this in reg domain format */
756 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
757 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
758 *pos
++ = 2 * sband
->n_channels
;
759 for (i
= 0; i
< sband
->n_channels
; i
++) {
760 *pos
++ = ieee80211_frequency_to_channel(
761 sband
->channels
[i
].center_freq
);
762 *pos
++ = 1; /* one channel in the subband*/
766 /* if present, add any custom IEs that go before HT */
767 if (assoc_data
->ie_len
) {
768 static const u8 before_ht
[] = {
771 WLAN_EID_EXT_SUPP_RATES
,
772 WLAN_EID_PWR_CAPABILITY
,
773 WLAN_EID_SUPPORTED_CHANNELS
,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
777 WLAN_EID_MOBILITY_DOMAIN
,
778 WLAN_EID_FAST_BSS_TRANSITION
, /* reassoc only */
779 WLAN_EID_RIC_DATA
, /* reassoc only */
780 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
782 static const u8 after_ric
[] = {
783 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
784 WLAN_EID_HT_CAPABILITY
,
785 WLAN_EID_BSS_COEX_2040
,
786 WLAN_EID_EXT_CAPABILITY
,
787 WLAN_EID_QOS_TRAFFIC_CAPA
,
788 WLAN_EID_TIM_BCAST_REQ
,
789 WLAN_EID_INTERWORKING
,
790 /* 60GHz doesn't happen right now */
791 WLAN_EID_VHT_CAPABILITY
,
792 WLAN_EID_OPMODE_NOTIF
,
795 noffset
= ieee80211_ie_split_ric(assoc_data
->ie
,
798 ARRAY_SIZE(before_ht
),
800 ARRAY_SIZE(after_ric
),
802 pos
= skb_put(skb
, noffset
- offset
);
803 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
807 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
808 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
809 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
811 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
812 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
813 sband
, chan
, sdata
->smps_mode
);
815 /* if present, add any custom IEs that go before VHT */
816 if (assoc_data
->ie_len
) {
817 static const u8 before_vht
[] = {
820 WLAN_EID_EXT_SUPP_RATES
,
821 WLAN_EID_PWR_CAPABILITY
,
822 WLAN_EID_SUPPORTED_CHANNELS
,
825 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
826 WLAN_EID_MOBILITY_DOMAIN
,
827 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
828 WLAN_EID_HT_CAPABILITY
,
829 WLAN_EID_BSS_COEX_2040
,
830 WLAN_EID_EXT_CAPABILITY
,
831 WLAN_EID_QOS_TRAFFIC_CAPA
,
832 WLAN_EID_TIM_BCAST_REQ
,
833 WLAN_EID_INTERWORKING
,
836 /* RIC already taken above, so no need to handle here anymore */
837 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
838 before_vht
, ARRAY_SIZE(before_vht
),
840 pos
= skb_put(skb
, noffset
- offset
);
841 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
845 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
846 ieee80211_add_vht_ie(sdata
, skb
, sband
,
847 &assoc_data
->ap_vht_cap
);
849 /* if present, add any custom non-vendor IEs that go after HT */
850 if (assoc_data
->ie_len
) {
851 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
854 pos
= skb_put(skb
, noffset
- offset
);
855 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
859 if (assoc_data
->wmm
) {
860 if (assoc_data
->uapsd
) {
861 qos_info
= ifmgd
->uapsd_queues
;
862 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
863 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
868 pos
= ieee80211_add_wmm_info_ie(skb_put(skb
, 9), qos_info
);
871 /* add any remaining custom (i.e. vendor specific here) IEs */
872 if (assoc_data
->ie_len
) {
873 noffset
= assoc_data
->ie_len
;
874 pos
= skb_put(skb
, noffset
- offset
);
875 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
878 drv_mgd_prepare_tx(local
, sdata
);
880 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
881 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
882 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
883 IEEE80211_TX_INTFL_MLME_CONN_TX
;
884 ieee80211_tx_skb(sdata
, skb
);
887 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
888 struct ieee80211_sub_if_data
*sdata
)
890 struct ieee80211_pspoll
*pspoll
;
893 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
897 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
898 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
900 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
901 ieee80211_tx_skb(sdata
, skb
);
904 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
905 struct ieee80211_sub_if_data
*sdata
,
909 struct ieee80211_hdr_3addr
*nullfunc
;
910 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
912 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
916 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
918 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
920 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
921 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
923 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
924 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
926 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
927 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
929 ieee80211_tx_skb(sdata
, skb
);
932 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
933 struct ieee80211_sub_if_data
*sdata
)
936 struct ieee80211_hdr
*nullfunc
;
939 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
942 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
946 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
948 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
949 memset(nullfunc
, 0, 30);
950 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
951 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
952 nullfunc
->frame_control
= fc
;
953 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
954 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
955 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
956 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
958 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
959 ieee80211_tx_skb(sdata
, skb
);
962 /* spectrum management related things */
963 static void ieee80211_chswitch_work(struct work_struct
*work
)
965 struct ieee80211_sub_if_data
*sdata
=
966 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
967 struct ieee80211_local
*local
= sdata
->local
;
968 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
971 if (!ieee80211_sdata_running(sdata
))
975 mutex_lock(&local
->mtx
);
976 mutex_lock(&local
->chanctx_mtx
);
978 if (!ifmgd
->associated
)
981 if (!sdata
->vif
.csa_active
)
985 * using reservation isn't immediate as it may be deferred until later
986 * with multi-vif. once reservation is complete it will re-schedule the
987 * work with no reserved_chanctx so verify chandef to check if it
988 * completed successfully
991 if (sdata
->reserved_chanctx
) {
993 * with multi-vif csa driver may call ieee80211_csa_finish()
994 * many times while waiting for other interfaces to use their
997 if (sdata
->reserved_ready
)
1000 ret
= ieee80211_vif_use_reserved_context(sdata
);
1003 "failed to use reserved channel context, disconnecting (err=%d)\n",
1005 ieee80211_queue_work(&sdata
->local
->hw
,
1006 &ifmgd
->csa_connection_drop_work
);
1013 if (!cfg80211_chandef_identical(&sdata
->vif
.bss_conf
.chandef
,
1014 &sdata
->csa_chandef
)) {
1016 "failed to finalize channel switch, disconnecting\n");
1017 ieee80211_queue_work(&sdata
->local
->hw
,
1018 &ifmgd
->csa_connection_drop_work
);
1022 /* XXX: shouldn't really modify cfg80211-owned data! */
1023 ifmgd
->associated
->channel
= sdata
->csa_chandef
.chan
;
1025 ifmgd
->csa_waiting_bcn
= true;
1027 ieee80211_sta_reset_beacon_monitor(sdata
);
1028 ieee80211_sta_reset_conn_monitor(sdata
);
1031 mutex_unlock(&local
->chanctx_mtx
);
1032 mutex_unlock(&local
->mtx
);
1033 sdata_unlock(sdata
);
1036 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data
*sdata
)
1038 struct ieee80211_local
*local
= sdata
->local
;
1039 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1042 sdata_assert_lock(sdata
);
1044 WARN_ON(!sdata
->vif
.csa_active
);
1046 if (sdata
->csa_block_tx
) {
1047 ieee80211_wake_vif_queues(local
, sdata
,
1048 IEEE80211_QUEUE_STOP_REASON_CSA
);
1049 sdata
->csa_block_tx
= false;
1052 sdata
->vif
.csa_active
= false;
1053 ifmgd
->csa_waiting_bcn
= false;
1055 ret
= drv_post_channel_switch(sdata
);
1058 "driver post channel switch failed, disconnecting\n");
1059 ieee80211_queue_work(&local
->hw
,
1060 &ifmgd
->csa_connection_drop_work
);
1064 cfg80211_ch_switch_notify(sdata
->dev
, &sdata
->reserved_chandef
);
1067 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
1069 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1070 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1072 trace_api_chswitch_done(sdata
, success
);
1075 "driver channel switch failed, disconnecting\n");
1076 ieee80211_queue_work(&sdata
->local
->hw
,
1077 &ifmgd
->csa_connection_drop_work
);
1079 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1082 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1084 static void ieee80211_chswitch_timer(unsigned long data
)
1086 struct ieee80211_sub_if_data
*sdata
=
1087 (struct ieee80211_sub_if_data
*) data
;
1089 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1093 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1094 u64 timestamp
, u32 device_timestamp
,
1095 struct ieee802_11_elems
*elems
,
1098 struct ieee80211_local
*local
= sdata
->local
;
1099 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1100 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1101 struct ieee80211_chanctx_conf
*conf
;
1102 struct ieee80211_chanctx
*chanctx
;
1103 enum nl80211_band current_band
;
1104 struct ieee80211_csa_ie csa_ie
;
1105 struct ieee80211_channel_switch ch_switch
;
1108 sdata_assert_lock(sdata
);
1113 if (local
->scanning
)
1116 /* disregard subsequent announcements if we are already processing */
1117 if (sdata
->vif
.csa_active
)
1120 current_band
= cbss
->channel
->band
;
1121 memset(&csa_ie
, 0, sizeof(csa_ie
));
1122 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, current_band
,
1124 ifmgd
->associated
->bssid
, &csa_ie
);
1126 ieee80211_queue_work(&local
->hw
,
1127 &ifmgd
->csa_connection_drop_work
);
1131 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
1132 IEEE80211_CHAN_DISABLED
)) {
1134 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1135 ifmgd
->associated
->bssid
,
1136 csa_ie
.chandef
.chan
->center_freq
,
1137 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
1138 csa_ie
.chandef
.center_freq2
);
1139 ieee80211_queue_work(&local
->hw
,
1140 &ifmgd
->csa_connection_drop_work
);
1144 if (cfg80211_chandef_identical(&csa_ie
.chandef
,
1145 &sdata
->vif
.bss_conf
.chandef
)) {
1146 if (ifmgd
->csa_ignored_same_chan
)
1149 "AP %pM tries to chanswitch to same channel, ignore\n",
1150 ifmgd
->associated
->bssid
);
1151 ifmgd
->csa_ignored_same_chan
= true;
1156 * Drop all TDLS peers - either we disconnect or move to a different
1157 * channel from this point on. There's no telling what our peer will do.
1158 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1159 * have an incompatible wider chandef.
1161 ieee80211_teardown_tdls_peers(sdata
);
1163 mutex_lock(&local
->mtx
);
1164 mutex_lock(&local
->chanctx_mtx
);
1165 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1166 lockdep_is_held(&local
->chanctx_mtx
));
1169 "no channel context assigned to vif?, disconnecting\n");
1170 goto drop_connection
;
1173 chanctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1175 if (local
->use_chanctx
&&
1176 !ieee80211_hw_check(&local
->hw
, CHANCTX_STA_CSA
)) {
1178 "driver doesn't support chan-switch with channel contexts\n");
1179 goto drop_connection
;
1182 ch_switch
.timestamp
= timestamp
;
1183 ch_switch
.device_timestamp
= device_timestamp
;
1184 ch_switch
.block_tx
= csa_ie
.mode
;
1185 ch_switch
.chandef
= csa_ie
.chandef
;
1186 ch_switch
.count
= csa_ie
.count
;
1188 if (drv_pre_channel_switch(sdata
, &ch_switch
)) {
1190 "preparing for channel switch failed, disconnecting\n");
1191 goto drop_connection
;
1194 res
= ieee80211_vif_reserve_chanctx(sdata
, &csa_ie
.chandef
,
1195 chanctx
->mode
, false);
1198 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1200 goto drop_connection
;
1202 mutex_unlock(&local
->chanctx_mtx
);
1204 sdata
->vif
.csa_active
= true;
1205 sdata
->csa_chandef
= csa_ie
.chandef
;
1206 sdata
->csa_block_tx
= csa_ie
.mode
;
1207 ifmgd
->csa_ignored_same_chan
= false;
1209 if (sdata
->csa_block_tx
)
1210 ieee80211_stop_vif_queues(local
, sdata
,
1211 IEEE80211_QUEUE_STOP_REASON_CSA
);
1212 mutex_unlock(&local
->mtx
);
1214 cfg80211_ch_switch_started_notify(sdata
->dev
, &csa_ie
.chandef
,
1217 if (local
->ops
->channel_switch
) {
1218 /* use driver's channel switch callback */
1219 drv_channel_switch(local
, sdata
, &ch_switch
);
1223 /* channel switch handled in software */
1224 if (csa_ie
.count
<= 1)
1225 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1227 mod_timer(&ifmgd
->chswitch_timer
,
1228 TU_TO_EXP_TIME((csa_ie
.count
- 1) *
1229 cbss
->beacon_interval
));
1232 ieee80211_queue_work(&local
->hw
, &ifmgd
->csa_connection_drop_work
);
1233 mutex_unlock(&local
->chanctx_mtx
);
1234 mutex_unlock(&local
->mtx
);
1238 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1239 struct ieee80211_channel
*channel
,
1240 const u8
*country_ie
, u8 country_ie_len
,
1241 const u8
*pwr_constr_elem
,
1242 int *chan_pwr
, int *pwr_reduction
)
1244 struct ieee80211_country_ie_triplet
*triplet
;
1245 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1246 int i
, chan_increment
;
1247 bool have_chan_pwr
= false;
1250 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1253 triplet
= (void *)(country_ie
+ 3);
1254 country_ie_len
-= 3;
1256 switch (channel
->band
) {
1260 case NL80211_BAND_2GHZ
:
1261 case NL80211_BAND_60GHZ
:
1264 case NL80211_BAND_5GHZ
:
1270 while (country_ie_len
>= 3) {
1271 u8 first_channel
= triplet
->chans
.first_channel
;
1273 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1276 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1277 if (first_channel
+ i
* chan_increment
== chan
) {
1278 have_chan_pwr
= true;
1279 *chan_pwr
= triplet
->chans
.max_power
;
1288 country_ie_len
-= 3;
1291 if (have_chan_pwr
&& pwr_constr_elem
)
1292 *pwr_reduction
= *pwr_constr_elem
;
1296 return have_chan_pwr
;
1299 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data
*sdata
,
1300 struct ieee80211_channel
*channel
,
1301 const u8
*cisco_dtpc_ie
,
1304 /* From practical testing, the first data byte of the DTPC element
1305 * seems to contain the requested dBm level, and the CLI on Cisco
1306 * APs clearly state the range is -127 to 127 dBm, which indicates
1307 * a signed byte, although it seemingly never actually goes negative.
1308 * The other byte seems to always be zero.
1310 *pwr_level
= (__s8
)cisco_dtpc_ie
[4];
1313 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1314 struct ieee80211_channel
*channel
,
1315 struct ieee80211_mgmt
*mgmt
,
1316 const u8
*country_ie
, u8 country_ie_len
,
1317 const u8
*pwr_constr_ie
,
1318 const u8
*cisco_dtpc_ie
)
1320 bool has_80211h_pwr
= false, has_cisco_pwr
= false;
1321 int chan_pwr
= 0, pwr_reduction_80211h
= 0;
1322 int pwr_level_cisco
, pwr_level_80211h
;
1324 __le16 capab
= mgmt
->u
.probe_resp
.capab_info
;
1327 (capab
& cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
) ||
1328 capab
& cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE
))) {
1329 has_80211h_pwr
= ieee80211_find_80211h_pwr_constr(
1330 sdata
, channel
, country_ie
, country_ie_len
,
1331 pwr_constr_ie
, &chan_pwr
, &pwr_reduction_80211h
);
1333 max_t(int, 0, chan_pwr
- pwr_reduction_80211h
);
1336 if (cisco_dtpc_ie
) {
1337 ieee80211_find_cisco_dtpc(
1338 sdata
, channel
, cisco_dtpc_ie
, &pwr_level_cisco
);
1339 has_cisco_pwr
= true;
1342 if (!has_80211h_pwr
&& !has_cisco_pwr
)
1345 /* If we have both 802.11h and Cisco DTPC, apply both limits
1346 * by picking the smallest of the two power levels advertised.
1348 if (has_80211h_pwr
&&
1349 (!has_cisco_pwr
|| pwr_level_80211h
<= pwr_level_cisco
)) {
1350 new_ap_level
= pwr_level_80211h
;
1352 if (sdata
->ap_power_level
== new_ap_level
)
1356 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1357 pwr_level_80211h
, chan_pwr
, pwr_reduction_80211h
,
1358 sdata
->u
.mgd
.bssid
);
1359 } else { /* has_cisco_pwr is always true here. */
1360 new_ap_level
= pwr_level_cisco
;
1362 if (sdata
->ap_power_level
== new_ap_level
)
1366 "Limiting TX power to %d dBm as advertised by %pM\n",
1367 pwr_level_cisco
, sdata
->u
.mgd
.bssid
);
1370 sdata
->ap_power_level
= new_ap_level
;
1371 if (__ieee80211_recalc_txpower(sdata
))
1372 return BSS_CHANGED_TXPOWER
;
1377 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1378 struct ieee80211_sub_if_data
*sdata
)
1380 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1383 * If we are scanning right now then the parameters will
1384 * take effect when scan finishes.
1386 if (local
->scanning
)
1389 if (conf
->dynamic_ps_timeout
> 0 &&
1390 !ieee80211_hw_check(&local
->hw
, SUPPORTS_DYNAMIC_PS
)) {
1391 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1392 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1394 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
))
1395 ieee80211_send_nullfunc(local
, sdata
, true);
1397 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1398 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
1401 conf
->flags
|= IEEE80211_CONF_PS
;
1402 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1406 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1408 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1410 if (local
->ps_sdata
) {
1411 ieee80211_enable_ps(local
, local
->ps_sdata
);
1412 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1413 conf
->flags
&= ~IEEE80211_CONF_PS
;
1414 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1415 del_timer_sync(&local
->dynamic_ps_timer
);
1416 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1420 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1422 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1423 struct sta_info
*sta
= NULL
;
1424 bool authorized
= false;
1426 if (!mgd
->powersave
)
1432 if (!mgd
->associated
)
1435 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1438 if (!mgd
->have_beacon
)
1442 sta
= sta_info_get(sdata
, mgd
->bssid
);
1444 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1450 /* need to hold RTNL or interface lock */
1451 void ieee80211_recalc_ps(struct ieee80211_local
*local
)
1453 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1457 if (!ieee80211_hw_check(&local
->hw
, SUPPORTS_PS
)) {
1458 local
->ps_sdata
= NULL
;
1462 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1463 if (!ieee80211_sdata_running(sdata
))
1465 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1466 /* If an AP vif is found, then disable PS
1467 * by setting the count to zero thereby setting
1473 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1479 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1480 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1483 beaconint_us
= ieee80211_tu_to_usec(
1484 found
->vif
.bss_conf
.beacon_int
);
1486 timeout
= local
->dynamic_ps_forced_timeout
;
1489 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1491 /* If the TIM IE is invalid, pretend the value is 1 */
1495 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1496 local
->ps_sdata
= found
;
1498 local
->ps_sdata
= NULL
;
1501 ieee80211_change_ps(local
);
1504 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1506 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1508 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1509 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1510 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1514 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1516 struct ieee80211_local
*local
=
1517 container_of(work
, struct ieee80211_local
,
1518 dynamic_ps_disable_work
);
1520 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1521 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1522 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1525 ieee80211_wake_queues_by_reason(&local
->hw
,
1526 IEEE80211_MAX_QUEUE_MAP
,
1527 IEEE80211_QUEUE_STOP_REASON_PS
,
1531 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1533 struct ieee80211_local
*local
=
1534 container_of(work
, struct ieee80211_local
,
1535 dynamic_ps_enable_work
);
1536 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1537 struct ieee80211_if_managed
*ifmgd
;
1538 unsigned long flags
;
1541 /* can only happen when PS was just disabled anyway */
1545 ifmgd
= &sdata
->u
.mgd
;
1547 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1550 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1551 /* don't enter PS if TX frames are pending */
1552 if (drv_tx_frames_pending(local
)) {
1553 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1555 local
->hw
.conf
.dynamic_ps_timeout
));
1560 * transmission can be stopped by others which leads to
1561 * dynamic_ps_timer expiry. Postpone the ps timer if it
1562 * is not the actual idle state.
1564 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1565 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1566 if (local
->queue_stop_reasons
[q
]) {
1567 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1569 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1571 local
->hw
.conf
.dynamic_ps_timeout
));
1575 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1578 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
1579 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1580 if (drv_tx_frames_pending(local
)) {
1581 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1583 local
->hw
.conf
.dynamic_ps_timeout
));
1585 ieee80211_send_nullfunc(local
, sdata
, true);
1586 /* Flush to get the tx status of nullfunc frame */
1587 ieee80211_flush_queues(local
, sdata
, false);
1591 if (!(ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
) &&
1592 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
)) ||
1593 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1594 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1595 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1596 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1600 void ieee80211_dynamic_ps_timer(unsigned long data
)
1602 struct ieee80211_local
*local
= (void *) data
;
1604 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1607 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1609 struct delayed_work
*delayed_work
= to_delayed_work(work
);
1610 struct ieee80211_sub_if_data
*sdata
=
1611 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1612 dfs_cac_timer_work
);
1613 struct cfg80211_chan_def chandef
= sdata
->vif
.bss_conf
.chandef
;
1615 mutex_lock(&sdata
->local
->mtx
);
1616 if (sdata
->wdev
.cac_started
) {
1617 ieee80211_vif_release_channel(sdata
);
1618 cfg80211_cac_event(sdata
->dev
, &chandef
,
1619 NL80211_RADAR_CAC_FINISHED
,
1622 mutex_unlock(&sdata
->local
->mtx
);
1626 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1628 struct ieee80211_local
*local
= sdata
->local
;
1629 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1633 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1636 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1637 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
1639 unsigned long now
= jiffies
;
1641 if (tx_tspec
->action
== TX_TSPEC_ACTION_NONE
&&
1642 tx_tspec
->admitted_time
&&
1643 time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1644 tx_tspec
->consumed_tx_time
= 0;
1645 tx_tspec
->time_slice_start
= now
;
1647 if (tx_tspec
->downgraded
)
1649 TX_TSPEC_ACTION_STOP_DOWNGRADE
;
1652 switch (tx_tspec
->action
) {
1653 case TX_TSPEC_ACTION_STOP_DOWNGRADE
:
1654 /* take the original parameters */
1655 if (drv_conf_tx(local
, sdata
, ac
, &sdata
->tx_conf
[ac
]))
1657 "failed to set TX queue parameters for queue %d\n",
1659 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1660 tx_tspec
->downgraded
= false;
1663 case TX_TSPEC_ACTION_DOWNGRADE
:
1664 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1665 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1669 /* downgrade next lower non-ACM AC */
1670 for (non_acm_ac
= ac
+ 1;
1671 non_acm_ac
< IEEE80211_NUM_ACS
;
1673 if (!(sdata
->wmm_acm
& BIT(7 - 2 * non_acm_ac
)))
1675 /* The loop will result in using BK even if it requires
1676 * admission control, such configuration makes no sense
1677 * and we have to transmit somehow - the AC selection
1678 * does the same thing.
1680 if (drv_conf_tx(local
, sdata
, ac
,
1681 &sdata
->tx_conf
[non_acm_ac
]))
1683 "failed to set TX queue parameters for queue %d\n",
1685 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1687 schedule_delayed_work(&ifmgd
->tx_tspec_wk
,
1688 tx_tspec
->time_slice_start
+ HZ
- now
+ 1);
1690 case TX_TSPEC_ACTION_NONE
:
1699 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1701 if (__ieee80211_sta_handle_tspec_ac_params(sdata
))
1702 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
1705 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct
*work
)
1707 struct ieee80211_sub_if_data
*sdata
;
1709 sdata
= container_of(work
, struct ieee80211_sub_if_data
,
1710 u
.mgd
.tx_tspec_wk
.work
);
1711 ieee80211_sta_handle_tspec_ac_params(sdata
);
1715 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1716 struct ieee80211_sub_if_data
*sdata
,
1717 const u8
*wmm_param
, size_t wmm_param_len
)
1719 struct ieee80211_tx_queue_params params
[IEEE80211_NUM_ACS
];
1720 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1724 u8 uapsd_queues
= 0;
1726 if (!local
->ops
->conf_tx
)
1729 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1735 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1738 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1739 uapsd_queues
= ifmgd
->uapsd_queues
;
1741 count
= wmm_param
[6] & 0x0f;
1742 if (count
== ifmgd
->wmm_last_param_set
)
1744 ifmgd
->wmm_last_param_set
= count
;
1746 pos
= wmm_param
+ 8;
1747 left
= wmm_param_len
- 8;
1749 memset(¶ms
, 0, sizeof(params
));
1752 for (; left
>= 4; left
-= 4, pos
+= 4) {
1753 int aci
= (pos
[0] >> 5) & 0x03;
1754 int acm
= (pos
[0] >> 4) & 0x01;
1759 ac
= IEEE80211_AC_BK
;
1761 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1762 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1766 ac
= IEEE80211_AC_VI
;
1768 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1769 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1773 ac
= IEEE80211_AC_VO
;
1775 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1776 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1781 ac
= IEEE80211_AC_BE
;
1783 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1784 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1789 params
[ac
].aifs
= pos
[0] & 0x0f;
1791 if (params
[ac
].aifs
< 2) {
1793 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1794 params
[ac
].aifs
, aci
);
1795 params
[ac
].aifs
= 2;
1797 params
[ac
].cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1798 params
[ac
].cw_min
= ecw2cw(pos
[1] & 0x0f);
1799 params
[ac
].txop
= get_unaligned_le16(pos
+ 2);
1800 params
[ac
].acm
= acm
;
1801 params
[ac
].uapsd
= uapsd
;
1803 if (params
[ac
].cw_min
> params
[ac
].cw_max
) {
1805 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1806 params
[ac
].cw_min
, params
[ac
].cw_max
, aci
);
1811 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1813 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1815 params
[ac
].aifs
, params
[ac
].cw_min
, params
[ac
].cw_max
,
1816 params
[ac
].txop
, params
[ac
].uapsd
,
1817 ifmgd
->tx_tspec
[ac
].downgraded
);
1818 sdata
->tx_conf
[ac
] = params
[ac
];
1819 if (!ifmgd
->tx_tspec
[ac
].downgraded
&&
1820 drv_conf_tx(local
, sdata
, ac
, ¶ms
[ac
]))
1822 "failed to set TX queue parameters for AC %d\n",
1826 /* enable WMM or activate new settings */
1827 sdata
->vif
.bss_conf
.qos
= true;
1831 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1833 lockdep_assert_held(&sdata
->local
->mtx
);
1835 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1836 ieee80211_run_deferred_scan(sdata
->local
);
1839 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1841 mutex_lock(&sdata
->local
->mtx
);
1842 __ieee80211_stop_poll(sdata
);
1843 mutex_unlock(&sdata
->local
->mtx
);
1846 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1847 u16 capab
, bool erp_valid
, u8 erp
)
1849 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1851 bool use_protection
;
1852 bool use_short_preamble
;
1853 bool use_short_slot
;
1856 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1857 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1859 use_protection
= false;
1860 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1863 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1864 if (ieee80211_get_sdata_band(sdata
) == NL80211_BAND_5GHZ
)
1865 use_short_slot
= true;
1867 if (use_protection
!= bss_conf
->use_cts_prot
) {
1868 bss_conf
->use_cts_prot
= use_protection
;
1869 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1872 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1873 bss_conf
->use_short_preamble
= use_short_preamble
;
1874 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1877 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1878 bss_conf
->use_short_slot
= use_short_slot
;
1879 changed
|= BSS_CHANGED_ERP_SLOT
;
1885 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1886 struct cfg80211_bss
*cbss
,
1887 u32 bss_info_changed
)
1889 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1890 struct ieee80211_local
*local
= sdata
->local
;
1891 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1893 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1894 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1895 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1897 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1898 beacon_loss_count
* bss_conf
->beacon_int
));
1900 sdata
->u
.mgd
.associated
= cbss
;
1901 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1903 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1905 if (sdata
->vif
.p2p
||
1906 sdata
->vif
.driver_flags
& IEEE80211_VIF_GET_NOA_UPDATE
) {
1907 const struct cfg80211_bss_ies
*ies
;
1910 ies
= rcu_dereference(cbss
->ies
);
1914 ret
= cfg80211_get_p2p_attr(
1915 ies
->data
, ies
->len
,
1916 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1917 (u8
*) &bss_conf
->p2p_noa_attr
,
1918 sizeof(bss_conf
->p2p_noa_attr
));
1920 sdata
->u
.mgd
.p2p_noa_index
=
1921 bss_conf
->p2p_noa_attr
.index
;
1922 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1928 /* just to be sure */
1929 ieee80211_stop_poll(sdata
);
1931 ieee80211_led_assoc(local
, 1);
1933 if (sdata
->u
.mgd
.have_beacon
) {
1935 * If the AP is buggy we may get here with no DTIM period
1936 * known, so assume it's 1 which is the only safe assumption
1937 * in that case, although if the TIM IE is broken powersave
1938 * probably just won't work at all.
1940 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1941 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1942 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1944 bss_conf
->beacon_rate
= NULL
;
1945 bss_conf
->dtim_period
= 0;
1948 bss_conf
->assoc
= 1;
1950 /* Tell the driver to monitor connection quality (if supported) */
1951 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1952 bss_conf
->cqm_rssi_thold
)
1953 bss_info_changed
|= BSS_CHANGED_CQM
;
1955 /* Enable ARP filtering */
1956 if (bss_conf
->arp_addr_cnt
)
1957 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1959 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1961 mutex_lock(&local
->iflist_mtx
);
1962 ieee80211_recalc_ps(local
);
1963 mutex_unlock(&local
->iflist_mtx
);
1965 ieee80211_recalc_smps(sdata
);
1966 ieee80211_recalc_ps_vif(sdata
);
1968 netif_carrier_on(sdata
->dev
);
1971 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1972 u16 stype
, u16 reason
, bool tx
,
1975 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1976 struct ieee80211_local
*local
= sdata
->local
;
1979 sdata_assert_lock(sdata
);
1981 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1984 if (WARN_ON(!ifmgd
->associated
))
1987 ieee80211_stop_poll(sdata
);
1989 ifmgd
->associated
= NULL
;
1990 netif_carrier_off(sdata
->dev
);
1993 * if we want to get out of ps before disassoc (why?) we have
1994 * to do it before sending disassoc, as otherwise the null-packet
1997 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1998 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1999 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2001 local
->ps_sdata
= NULL
;
2003 /* disable per-vif ps */
2004 ieee80211_recalc_ps_vif(sdata
);
2006 /* make sure ongoing transmission finishes */
2010 * drop any frame before deauth/disassoc, this can be data or
2011 * management frame. Since we are disconnecting, we should not
2012 * insist sending these frames which can take time and delay
2013 * the disconnection and possible the roaming.
2016 ieee80211_flush_queues(local
, sdata
, true);
2018 /* deauthenticate/disassociate now */
2019 if (tx
|| frame_buf
)
2020 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
2021 reason
, tx
, frame_buf
);
2023 /* flush out frame - make sure the deauth was actually sent */
2025 ieee80211_flush_queues(local
, sdata
, false);
2027 /* clear bssid only after building the needed mgmt frames */
2028 eth_zero_addr(ifmgd
->bssid
);
2030 /* remove AP and TDLS peers */
2031 sta_info_flush(sdata
);
2033 /* finally reset all BSS / config parameters */
2034 changed
|= ieee80211_reset_erp_info(sdata
);
2036 ieee80211_led_assoc(local
, 0);
2037 changed
|= BSS_CHANGED_ASSOC
;
2038 sdata
->vif
.bss_conf
.assoc
= false;
2040 ifmgd
->p2p_noa_index
= -1;
2041 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
2042 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
2044 /* on the next assoc, re-program HT/VHT parameters */
2045 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
2046 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
2047 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
2048 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
2050 /* reset MU-MIMO ownership and group data */
2051 memset(sdata
->vif
.bss_conf
.mu_group
.membership
, 0,
2052 sizeof(sdata
->vif
.bss_conf
.mu_group
.membership
));
2053 memset(sdata
->vif
.bss_conf
.mu_group
.position
, 0,
2054 sizeof(sdata
->vif
.bss_conf
.mu_group
.position
));
2055 changed
|= BSS_CHANGED_MU_GROUPS
;
2056 sdata
->vif
.mu_mimo_owner
= false;
2058 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
2060 del_timer_sync(&local
->dynamic_ps_timer
);
2061 cancel_work_sync(&local
->dynamic_ps_enable_work
);
2063 /* Disable ARP filtering */
2064 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
2065 changed
|= BSS_CHANGED_ARP_FILTER
;
2067 sdata
->vif
.bss_conf
.qos
= false;
2068 changed
|= BSS_CHANGED_QOS
;
2070 /* The BSSID (not really interesting) and HT changed */
2071 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
2072 ieee80211_bss_info_change_notify(sdata
, changed
);
2074 /* disassociated - set to defaults now */
2075 ieee80211_set_wmm_default(sdata
, false, false);
2077 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
2078 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
2079 del_timer_sync(&sdata
->u
.mgd
.timer
);
2080 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
2082 sdata
->vif
.bss_conf
.dtim_period
= 0;
2083 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
2085 ifmgd
->have_beacon
= false;
2088 mutex_lock(&local
->mtx
);
2089 ieee80211_vif_release_channel(sdata
);
2091 sdata
->vif
.csa_active
= false;
2092 ifmgd
->csa_waiting_bcn
= false;
2093 ifmgd
->csa_ignored_same_chan
= false;
2094 if (sdata
->csa_block_tx
) {
2095 ieee80211_wake_vif_queues(local
, sdata
,
2096 IEEE80211_QUEUE_STOP_REASON_CSA
);
2097 sdata
->csa_block_tx
= false;
2099 mutex_unlock(&local
->mtx
);
2101 /* existing TX TSPEC sessions no longer exist */
2102 memset(ifmgd
->tx_tspec
, 0, sizeof(ifmgd
->tx_tspec
));
2103 cancel_delayed_work_sync(&ifmgd
->tx_tspec_wk
);
2105 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2108 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
2109 struct ieee80211_hdr
*hdr
)
2112 * We can postpone the mgd.timer whenever receiving unicast frames
2113 * from AP because we know that the connection is working both ways
2114 * at that time. But multicast frames (and hence also beacons) must
2115 * be ignored here, because we need to trigger the timer during
2116 * data idle periods for sending the periodic probe request to the
2117 * AP we're connected to.
2119 if (is_multicast_ether_addr(hdr
->addr1
))
2122 ieee80211_sta_reset_conn_monitor(sdata
);
2125 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
2127 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2128 struct ieee80211_local
*local
= sdata
->local
;
2130 mutex_lock(&local
->mtx
);
2131 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
2134 __ieee80211_stop_poll(sdata
);
2136 mutex_lock(&local
->iflist_mtx
);
2137 ieee80211_recalc_ps(local
);
2138 mutex_unlock(&local
->iflist_mtx
);
2140 if (ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
2144 * We've received a probe response, but are not sure whether
2145 * we have or will be receiving any beacons or data, so let's
2146 * schedule the timers again, just in case.
2148 ieee80211_sta_reset_beacon_monitor(sdata
);
2150 mod_timer(&ifmgd
->conn_mon_timer
,
2151 round_jiffies_up(jiffies
+
2152 IEEE80211_CONNECTION_IDLE_TIME
));
2154 mutex_unlock(&local
->mtx
);
2157 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data
*sdata
,
2158 struct ieee80211_hdr
*hdr
,
2161 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2162 u16 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
2163 int ac
= ieee80211_ac_from_tid(tid
);
2164 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
2165 unsigned long now
= jiffies
;
2167 if (likely(!tx_tspec
->admitted_time
))
2170 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
2171 tx_tspec
->consumed_tx_time
= 0;
2172 tx_tspec
->time_slice_start
= now
;
2174 if (tx_tspec
->downgraded
) {
2175 tx_tspec
->action
= TX_TSPEC_ACTION_STOP_DOWNGRADE
;
2176 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2180 if (tx_tspec
->downgraded
)
2183 tx_tspec
->consumed_tx_time
+= tx_time
;
2185 if (tx_tspec
->consumed_tx_time
>= tx_tspec
->admitted_time
) {
2186 tx_tspec
->downgraded
= true;
2187 tx_tspec
->action
= TX_TSPEC_ACTION_DOWNGRADE
;
2188 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2192 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
2193 struct ieee80211_hdr
*hdr
, bool ack
, u16 tx_time
)
2195 ieee80211_sta_tx_wmm_ac_notify(sdata
, hdr
, tx_time
);
2197 if (!ieee80211_is_data(hdr
->frame_control
))
2200 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
2201 sdata
->u
.mgd
.probe_send_count
> 0) {
2203 ieee80211_sta_reset_conn_monitor(sdata
);
2205 sdata
->u
.mgd
.nullfunc_failed
= true;
2206 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2211 ieee80211_sta_reset_conn_monitor(sdata
);
2214 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2216 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2218 u8
*dst
= ifmgd
->associated
->bssid
;
2219 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2220 struct sta_info
*sta
;
2223 * Try sending broadcast probe requests for the last three
2224 * probe requests after the first ones failed since some
2225 * buggy APs only support broadcast probe requests.
2227 if (ifmgd
->probe_send_count
>= unicast_limit
)
2231 * When the hardware reports an accurate Tx ACK status, it's
2232 * better to send a nullfunc frame instead of a probe request,
2233 * as it will kick us off the AP quickly if we aren't associated
2234 * anymore. The timeout will be reset if the frame is ACKed by
2237 ifmgd
->probe_send_count
++;
2240 mutex_lock(&sdata
->local
->sta_mtx
);
2241 sta
= sta_info_get(sdata
, dst
);
2243 ieee80211_check_fast_rx(sta
);
2244 mutex_unlock(&sdata
->local
->sta_mtx
);
2247 if (ieee80211_hw_check(&sdata
->local
->hw
, REPORTS_TX_ACK_STATUS
)) {
2248 ifmgd
->nullfunc_failed
= false;
2249 ieee80211_send_nullfunc(sdata
->local
, sdata
, false);
2254 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2255 if (WARN_ON_ONCE(ssid
== NULL
))
2260 ieee80211_send_probe_req(sdata
, sdata
->vif
.addr
, dst
,
2261 ssid
+ 2, ssid_len
, NULL
,
2262 0, (u32
) -1, true, 0,
2263 ifmgd
->associated
->channel
, false);
2267 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2268 run_again(sdata
, ifmgd
->probe_timeout
);
2271 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2274 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2275 bool already
= false;
2277 if (!ieee80211_sdata_running(sdata
))
2282 if (!ifmgd
->associated
)
2285 mutex_lock(&sdata
->local
->mtx
);
2287 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2288 mutex_unlock(&sdata
->local
->mtx
);
2293 mlme_dbg_ratelimited(sdata
,
2294 "detected beacon loss from AP (missed %d beacons) - probing\n",
2297 ieee80211_cqm_beacon_loss_notify(&sdata
->vif
, GFP_KERNEL
);
2301 * The driver/our work has already reported this event or the
2302 * connection monitoring has kicked in and we have already sent
2303 * a probe request. Or maybe the AP died and the driver keeps
2304 * reporting until we disassociate...
2306 * In either case we have to ignore the current call to this
2307 * function (except for setting the correct probe reason bit)
2308 * because otherwise we would reset the timer every time and
2309 * never check whether we received a probe response!
2311 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
2314 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2316 mutex_unlock(&sdata
->local
->mtx
);
2321 mutex_lock(&sdata
->local
->iflist_mtx
);
2322 ieee80211_recalc_ps(sdata
->local
);
2323 mutex_unlock(&sdata
->local
->iflist_mtx
);
2325 ifmgd
->probe_send_count
= 0;
2326 ieee80211_mgd_probe_ap_send(sdata
);
2328 sdata_unlock(sdata
);
2331 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2332 struct ieee80211_vif
*vif
)
2334 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2335 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2336 struct cfg80211_bss
*cbss
;
2337 struct sk_buff
*skb
;
2341 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2344 sdata_assert_lock(sdata
);
2346 if (ifmgd
->associated
)
2347 cbss
= ifmgd
->associated
;
2348 else if (ifmgd
->auth_data
)
2349 cbss
= ifmgd
->auth_data
->bss
;
2350 else if (ifmgd
->assoc_data
)
2351 cbss
= ifmgd
->assoc_data
->bss
;
2356 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2357 if (WARN_ON_ONCE(ssid
== NULL
))
2362 skb
= ieee80211_build_probe_req(sdata
, sdata
->vif
.addr
, cbss
->bssid
,
2363 (u32
) -1, cbss
->channel
,
2370 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2372 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data
*sdata
,
2373 const u8
*buf
, size_t len
, bool tx
,
2376 struct ieee80211_event event
= {
2378 .u
.mlme
.data
= tx
? DEAUTH_TX_EVENT
: DEAUTH_RX_EVENT
,
2379 .u
.mlme
.reason
= reason
,
2383 cfg80211_tx_mlme_mgmt(sdata
->dev
, buf
, len
);
2385 cfg80211_rx_mlme_mgmt(sdata
->dev
, buf
, len
);
2387 drv_event_callback(sdata
->local
, sdata
, &event
);
2390 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2392 struct ieee80211_local
*local
= sdata
->local
;
2393 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2394 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2397 if (!ifmgd
->associated
) {
2398 sdata_unlock(sdata
);
2402 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2403 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2405 mutex_lock(&local
->mtx
);
2406 sdata
->vif
.csa_active
= false;
2407 ifmgd
->csa_waiting_bcn
= false;
2408 if (sdata
->csa_block_tx
) {
2409 ieee80211_wake_vif_queues(local
, sdata
,
2410 IEEE80211_QUEUE_STOP_REASON_CSA
);
2411 sdata
->csa_block_tx
= false;
2413 mutex_unlock(&local
->mtx
);
2415 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
2416 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2418 sdata_unlock(sdata
);
2421 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2423 struct ieee80211_sub_if_data
*sdata
=
2424 container_of(work
, struct ieee80211_sub_if_data
,
2425 u
.mgd
.beacon_connection_loss_work
);
2426 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2428 if (ifmgd
->associated
)
2429 ifmgd
->beacon_loss_count
++;
2431 if (ifmgd
->connection_loss
) {
2432 sdata_info(sdata
, "Connection to AP %pM lost\n",
2434 __ieee80211_disconnect(sdata
);
2436 ieee80211_mgd_probe_ap(sdata
, true);
2440 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2442 struct ieee80211_sub_if_data
*sdata
=
2443 container_of(work
, struct ieee80211_sub_if_data
,
2444 u
.mgd
.csa_connection_drop_work
);
2446 __ieee80211_disconnect(sdata
);
2449 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2451 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2452 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2454 trace_api_beacon_loss(sdata
);
2456 sdata
->u
.mgd
.connection_loss
= false;
2457 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2459 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2461 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2463 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2464 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2466 trace_api_connection_loss(sdata
);
2468 sdata
->u
.mgd
.connection_loss
= true;
2469 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2471 EXPORT_SYMBOL(ieee80211_connection_loss
);
2474 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2477 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2479 sdata_assert_lock(sdata
);
2483 * we are not authenticated yet, the only timer that could be
2484 * running is the timeout for the authentication response which
2485 * which is not relevant anymore.
2487 del_timer_sync(&sdata
->u
.mgd
.timer
);
2488 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2490 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2491 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2492 sdata
->u
.mgd
.flags
= 0;
2493 mutex_lock(&sdata
->local
->mtx
);
2494 ieee80211_vif_release_channel(sdata
);
2495 mutex_unlock(&sdata
->local
->mtx
);
2498 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2500 sdata
->u
.mgd
.auth_data
= NULL
;
2503 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2506 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2508 sdata_assert_lock(sdata
);
2512 * we are not associated yet, the only timer that could be
2513 * running is the timeout for the association response which
2514 * which is not relevant anymore.
2516 del_timer_sync(&sdata
->u
.mgd
.timer
);
2517 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2519 eth_zero_addr(sdata
->u
.mgd
.bssid
);
2520 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2521 sdata
->u
.mgd
.flags
= 0;
2522 sdata
->vif
.mu_mimo_owner
= false;
2524 mutex_lock(&sdata
->local
->mtx
);
2525 ieee80211_vif_release_channel(sdata
);
2526 mutex_unlock(&sdata
->local
->mtx
);
2530 sdata
->u
.mgd
.assoc_data
= NULL
;
2533 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2534 struct ieee80211_mgmt
*mgmt
, size_t len
)
2536 struct ieee80211_local
*local
= sdata
->local
;
2537 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2539 struct ieee802_11_elems elems
;
2542 pos
= mgmt
->u
.auth
.variable
;
2543 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2544 if (!elems
.challenge
)
2546 auth_data
->expected_transaction
= 4;
2547 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2548 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
2549 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2550 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2551 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2552 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2553 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2554 auth_data
->key
, auth_data
->key_len
,
2555 auth_data
->key_idx
, tx_flags
);
2558 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2559 struct ieee80211_mgmt
*mgmt
, size_t len
)
2561 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2563 u16 auth_alg
, auth_transaction
, status_code
;
2564 struct sta_info
*sta
;
2565 struct ieee80211_event event
= {
2567 .u
.mlme
.data
= AUTH_EVENT
,
2570 sdata_assert_lock(sdata
);
2575 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2578 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2580 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2583 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2584 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2585 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2587 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2588 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2589 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2590 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2592 ifmgd
->auth_data
->expected_transaction
);
2596 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2597 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2598 mgmt
->sa
, status_code
);
2599 ieee80211_destroy_auth_data(sdata
, false);
2600 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2601 event
.u
.mlme
.status
= MLME_DENIED
;
2602 event
.u
.mlme
.reason
= status_code
;
2603 drv_event_callback(sdata
->local
, sdata
, &event
);
2607 switch (ifmgd
->auth_data
->algorithm
) {
2608 case WLAN_AUTH_OPEN
:
2609 case WLAN_AUTH_LEAP
:
2613 case WLAN_AUTH_SHARED_KEY
:
2614 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2615 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2616 /* need another frame */
2621 WARN_ONCE(1, "invalid auth alg %d",
2622 ifmgd
->auth_data
->algorithm
);
2626 event
.u
.mlme
.status
= MLME_SUCCESS
;
2627 drv_event_callback(sdata
->local
, sdata
, &event
);
2628 sdata_info(sdata
, "authenticated\n");
2629 ifmgd
->auth_data
->done
= true;
2630 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2631 ifmgd
->auth_data
->timeout_started
= true;
2632 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2634 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2635 ifmgd
->auth_data
->expected_transaction
!= 2) {
2637 * Report auth frame to user space for processing since another
2638 * round of Authentication frames is still needed.
2640 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2644 /* move station state to auth */
2645 mutex_lock(&sdata
->local
->sta_mtx
);
2646 sta
= sta_info_get(sdata
, bssid
);
2648 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2651 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2652 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2655 mutex_unlock(&sdata
->local
->sta_mtx
);
2657 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2660 mutex_unlock(&sdata
->local
->sta_mtx
);
2661 /* ignore frame -- wait for timeout */
2664 #define case_WLAN(type) \
2665 case WLAN_REASON_##type: return #type
2667 static const char *ieee80211_get_reason_code_string(u16 reason_code
)
2669 switch (reason_code
) {
2670 case_WLAN(UNSPECIFIED
);
2671 case_WLAN(PREV_AUTH_NOT_VALID
);
2672 case_WLAN(DEAUTH_LEAVING
);
2673 case_WLAN(DISASSOC_DUE_TO_INACTIVITY
);
2674 case_WLAN(DISASSOC_AP_BUSY
);
2675 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA
);
2676 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA
);
2677 case_WLAN(DISASSOC_STA_HAS_LEFT
);
2678 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH
);
2679 case_WLAN(DISASSOC_BAD_POWER
);
2680 case_WLAN(DISASSOC_BAD_SUPP_CHAN
);
2681 case_WLAN(INVALID_IE
);
2682 case_WLAN(MIC_FAILURE
);
2683 case_WLAN(4WAY_HANDSHAKE_TIMEOUT
);
2684 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT
);
2685 case_WLAN(IE_DIFFERENT
);
2686 case_WLAN(INVALID_GROUP_CIPHER
);
2687 case_WLAN(INVALID_PAIRWISE_CIPHER
);
2688 case_WLAN(INVALID_AKMP
);
2689 case_WLAN(UNSUPP_RSN_VERSION
);
2690 case_WLAN(INVALID_RSN_IE_CAP
);
2691 case_WLAN(IEEE8021X_FAILED
);
2692 case_WLAN(CIPHER_SUITE_REJECTED
);
2693 case_WLAN(DISASSOC_UNSPECIFIED_QOS
);
2694 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH
);
2695 case_WLAN(DISASSOC_LOW_ACK
);
2696 case_WLAN(DISASSOC_QAP_EXCEED_TXOP
);
2697 case_WLAN(QSTA_LEAVE_QBSS
);
2698 case_WLAN(QSTA_NOT_USE
);
2699 case_WLAN(QSTA_REQUIRE_SETUP
);
2700 case_WLAN(QSTA_TIMEOUT
);
2701 case_WLAN(QSTA_CIPHER_NOT_SUPP
);
2702 case_WLAN(MESH_PEER_CANCELED
);
2703 case_WLAN(MESH_MAX_PEERS
);
2704 case_WLAN(MESH_CONFIG
);
2705 case_WLAN(MESH_CLOSE
);
2706 case_WLAN(MESH_MAX_RETRIES
);
2707 case_WLAN(MESH_CONFIRM_TIMEOUT
);
2708 case_WLAN(MESH_INVALID_GTK
);
2709 case_WLAN(MESH_INCONSISTENT_PARAM
);
2710 case_WLAN(MESH_INVALID_SECURITY
);
2711 case_WLAN(MESH_PATH_ERROR
);
2712 case_WLAN(MESH_PATH_NOFORWARD
);
2713 case_WLAN(MESH_PATH_DEST_UNREACHABLE
);
2714 case_WLAN(MAC_EXISTS_IN_MBSS
);
2715 case_WLAN(MESH_CHAN_REGULATORY
);
2716 case_WLAN(MESH_CHAN
);
2717 default: return "<unknown>";
2721 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2722 struct ieee80211_mgmt
*mgmt
, size_t len
)
2724 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2725 u16 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2727 sdata_assert_lock(sdata
);
2732 if (ifmgd
->associated
&&
2733 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
)) {
2734 const u8
*bssid
= ifmgd
->associated
->bssid
;
2736 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u=%s)\n",
2738 ieee80211_get_reason_code_string(reason_code
));
2740 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2742 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false,
2747 if (ifmgd
->assoc_data
&&
2748 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2749 const u8
*bssid
= ifmgd
->assoc_data
->bss
->bssid
;
2752 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2754 ieee80211_get_reason_code_string(reason_code
));
2756 ieee80211_destroy_assoc_data(sdata
, false);
2758 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2764 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2765 struct ieee80211_mgmt
*mgmt
, size_t len
)
2767 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2770 sdata_assert_lock(sdata
);
2775 if (!ifmgd
->associated
||
2776 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2779 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2781 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2782 mgmt
->sa
, reason_code
);
2784 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2786 ieee80211_report_disconnect(sdata
, (u8
*)mgmt
, len
, false, reason_code
);
2789 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2790 u8
*supp_rates
, unsigned int supp_rates_len
,
2791 u32
*rates
, u32
*basic_rates
,
2792 bool *have_higher_than_11mbit
,
2793 int *min_rate
, int *min_rate_index
,
2794 int shift
, u32 rate_flags
)
2798 for (i
= 0; i
< supp_rates_len
; i
++) {
2799 int rate
= supp_rates
[i
] & 0x7f;
2800 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2802 if ((rate
* 5 * (1 << shift
)) > 110)
2803 *have_higher_than_11mbit
= true;
2806 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2807 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2809 * Note: Even through the membership selector and the basic
2810 * rate flag share the same bit, they are not exactly
2813 if (!!(supp_rates
[i
] & 0x80) &&
2814 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2817 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2818 struct ieee80211_rate
*br
;
2821 br
= &sband
->bitrates
[j
];
2822 if ((rate_flags
& br
->flags
) != rate_flags
)
2825 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2826 if (brate
== rate
) {
2829 *basic_rates
|= BIT(j
);
2830 if ((rate
* 5) < *min_rate
) {
2831 *min_rate
= rate
* 5;
2832 *min_rate_index
= j
;
2840 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2841 struct cfg80211_bss
*cbss
,
2842 struct ieee80211_mgmt
*mgmt
, size_t len
)
2844 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2845 struct ieee80211_local
*local
= sdata
->local
;
2846 struct ieee80211_supported_band
*sband
;
2847 struct sta_info
*sta
;
2849 u16 capab_info
, aid
;
2850 struct ieee802_11_elems elems
;
2851 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2852 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2853 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2858 /* AssocResp and ReassocResp have identical structure */
2860 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2861 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2863 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2864 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2866 aid
&= ~(BIT(15) | BIT(14));
2868 ifmgd
->broken_ap
= false;
2870 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2871 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2874 ifmgd
->broken_ap
= true;
2877 pos
= mgmt
->u
.assoc_resp
.variable
;
2878 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2880 if (!elems
.supp_rates
) {
2881 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2886 ifmgd
->tdls_chan_switch_prohibited
=
2887 elems
.ext_capab
&& elems
.ext_capab_len
>= 5 &&
2888 (elems
.ext_capab
[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED
);
2891 * Some APs are erroneously not including some information in their
2892 * (re)association response frames. Try to recover by using the data
2893 * from the beacon or probe response. This seems to afflict mobile
2894 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2895 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2897 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2898 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2899 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2900 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2901 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2902 const struct cfg80211_bss_ies
*ies
;
2903 struct ieee802_11_elems bss_elems
;
2906 ies
= rcu_dereference(cbss
->ies
);
2908 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2914 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2916 if (assoc_data
->wmm
&&
2917 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2918 elems
.wmm_param
= bss_elems
.wmm_param
;
2920 "AP bug: WMM param missing from AssocResp\n");
2924 * Also check if we requested HT/VHT, otherwise the AP doesn't
2925 * have to include the IEs in the (re)association response.
2927 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2928 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2929 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2931 "AP bug: HT capability missing from AssocResp\n");
2933 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2934 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2935 elems
.ht_operation
= bss_elems
.ht_operation
;
2937 "AP bug: HT operation missing from AssocResp\n");
2939 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2940 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2941 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2943 "AP bug: VHT capa missing from AssocResp\n");
2945 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2946 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2947 elems
.vht_operation
= bss_elems
.vht_operation
;
2949 "AP bug: VHT operation missing from AssocResp\n");
2954 * We previously checked these in the beacon/probe response, so
2955 * they should be present here. This is just a safety net.
2957 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2958 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2960 "HT AP is missing WMM params or HT capability/operation\n");
2965 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2966 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2968 "VHT AP is missing VHT capability/operation\n");
2973 mutex_lock(&sdata
->local
->sta_mtx
);
2975 * station info was already allocated and inserted before
2976 * the association and should be available to us
2978 sta
= sta_info_get(sdata
, cbss
->bssid
);
2979 if (WARN_ON(!sta
)) {
2980 mutex_unlock(&sdata
->local
->sta_mtx
);
2985 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2987 /* Set up internal HT/VHT capabilities */
2988 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2989 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2990 elems
.ht_cap_elem
, sta
);
2992 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2993 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2994 elems
.vht_cap_elem
, sta
);
2997 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2998 * in their association response, so ignore that data for our own
2999 * configuration. If it changed since the last beacon, we'll get the
3000 * next beacon and update then.
3004 * If an operating mode notification IE is present, override the
3005 * NSS calculation (that would be done in rate_control_rate_init())
3006 * and use the # of streams from that element.
3008 if (elems
.opmode_notif
&&
3009 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
3012 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
3013 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
3015 sta
->sta
.rx_nss
= nss
;
3018 rate_control_rate_init(sta
);
3020 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
) {
3021 set_sta_flag(sta
, WLAN_STA_MFP
);
3022 sta
->sta
.mfp
= true;
3024 sta
->sta
.mfp
= false;
3027 sta
->sta
.wme
= elems
.wmm_param
&& local
->hw
.queues
>= IEEE80211_NUM_ACS
;
3029 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
3030 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
3031 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
3034 "failed to move station %pM to desired state\n",
3036 WARN_ON(__sta_info_destroy(sta
));
3037 mutex_unlock(&sdata
->local
->sta_mtx
);
3042 mutex_unlock(&sdata
->local
->sta_mtx
);
3045 * Always handle WMM once after association regardless
3046 * of the first value the AP uses. Setting -1 here has
3047 * that effect because the AP values is an unsigned
3050 ifmgd
->wmm_last_param_set
= -1;
3052 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
3053 ieee80211_set_wmm_default(sdata
, false, false);
3054 } else if (!ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3055 elems
.wmm_param_len
)) {
3056 /* still enable QoS since we might have HT/VHT */
3057 ieee80211_set_wmm_default(sdata
, false, true);
3058 /* set the disable-WMM flag in this case to disable
3059 * tracking WMM parameter changes in the beacon if
3060 * the parameters weren't actually valid. Doing so
3061 * avoids changing parameters very strangely when
3062 * the AP is going back and forth between valid and
3063 * invalid parameters.
3065 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
3067 changed
|= BSS_CHANGED_QOS
;
3069 /* set AID and assoc capability,
3070 * ieee80211_set_associated() will tell the driver */
3071 bss_conf
->aid
= aid
;
3072 bss_conf
->assoc_capability
= capab_info
;
3073 ieee80211_set_associated(sdata
, cbss
, changed
);
3076 * If we're using 4-addr mode, let the AP know that we're
3077 * doing so, so that it can create the STA VLAN on its side
3079 if (ifmgd
->use_4addr
)
3080 ieee80211_send_4addr_nullfunc(local
, sdata
);
3083 * Start timer to probe the connection to the AP now.
3084 * Also start the timer that will detect beacon loss.
3086 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
3087 ieee80211_sta_reset_beacon_monitor(sdata
);
3095 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
3096 struct ieee80211_mgmt
*mgmt
,
3099 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3100 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
3101 u16 capab_info
, status_code
, aid
;
3102 struct ieee802_11_elems elems
;
3103 int ac
, uapsd_queues
= -1;
3106 struct cfg80211_bss
*bss
;
3107 struct ieee80211_event event
= {
3109 .u
.mlme
.data
= ASSOC_EVENT
,
3112 sdata_assert_lock(sdata
);
3116 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
3120 * AssocResp and ReassocResp have identical structure, so process both
3121 * of them in this function.
3127 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
3128 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
3129 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
3130 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
3133 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3134 reassoc
? "Rea" : "A", mgmt
->sa
,
3135 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
3137 pos
= mgmt
->u
.assoc_resp
.variable
;
3138 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
3140 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
3141 elems
.timeout_int
&&
3142 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
3144 tu
= le32_to_cpu(elems
.timeout_int
->value
);
3145 ms
= tu
* 1024 / 1000;
3147 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3149 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
3150 assoc_data
->timeout_started
= true;
3151 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
3152 run_again(sdata
, assoc_data
->timeout
);
3156 bss
= assoc_data
->bss
;
3158 if (status_code
!= WLAN_STATUS_SUCCESS
) {
3159 sdata_info(sdata
, "%pM denied association (code=%d)\n",
3160 mgmt
->sa
, status_code
);
3161 ieee80211_destroy_assoc_data(sdata
, false);
3162 event
.u
.mlme
.status
= MLME_DENIED
;
3163 event
.u
.mlme
.reason
= status_code
;
3164 drv_event_callback(sdata
->local
, sdata
, &event
);
3166 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
3167 /* oops -- internal error -- send timeout for now */
3168 ieee80211_destroy_assoc_data(sdata
, false);
3169 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3172 event
.u
.mlme
.status
= MLME_SUCCESS
;
3173 drv_event_callback(sdata
->local
, sdata
, &event
);
3174 sdata_info(sdata
, "associated\n");
3177 * destroy assoc_data afterwards, as otherwise an idle
3178 * recalc after assoc_data is NULL but before associated
3179 * is set can cause the interface to go idle
3181 ieee80211_destroy_assoc_data(sdata
, true);
3183 /* get uapsd queues configuration */
3185 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
3186 if (sdata
->tx_conf
[ac
].uapsd
)
3187 uapsd_queues
|= BIT(ac
);
3190 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
, uapsd_queues
);
3193 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
3194 struct ieee80211_mgmt
*mgmt
, size_t len
,
3195 struct ieee80211_rx_status
*rx_status
,
3196 struct ieee802_11_elems
*elems
)
3198 struct ieee80211_local
*local
= sdata
->local
;
3199 struct ieee80211_bss
*bss
;
3200 struct ieee80211_channel
*channel
;
3202 sdata_assert_lock(sdata
);
3204 channel
= ieee80211_get_channel(local
->hw
.wiphy
, rx_status
->freq
);
3208 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
3211 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
3212 ieee80211_rx_bss_put(local
, bss
);
3217 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
3218 struct sk_buff
*skb
)
3220 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
3221 struct ieee80211_if_managed
*ifmgd
;
3222 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
3223 size_t baselen
, len
= skb
->len
;
3224 struct ieee802_11_elems elems
;
3226 ifmgd
= &sdata
->u
.mgd
;
3228 sdata_assert_lock(sdata
);
3230 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
3231 return; /* ignore ProbeResp to foreign address */
3233 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
3237 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
3240 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3242 if (ifmgd
->associated
&&
3243 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3244 ieee80211_reset_ap_probe(sdata
);
3248 * This is the canonical list of information elements we care about,
3249 * the filter code also gives us all changes to the Microsoft OUI
3250 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3251 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3252 * changes to requested client power.
3254 * We implement beacon filtering in software since that means we can
3255 * avoid processing the frame here and in cfg80211, and userspace
3256 * will not be able to tell whether the hardware supports it or not.
3258 * XXX: This list needs to be dynamic -- userspace needs to be able to
3259 * add items it requires. It also needs to be able to tell us to
3260 * look out for other vendor IEs.
3262 static const u64 care_about_ies
=
3263 (1ULL << WLAN_EID_COUNTRY
) |
3264 (1ULL << WLAN_EID_ERP_INFO
) |
3265 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
3266 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
3267 (1ULL << WLAN_EID_HT_CAPABILITY
) |
3268 (1ULL << WLAN_EID_HT_OPERATION
) |
3269 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN
);
3271 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
3272 struct ieee80211_mgmt
*mgmt
, size_t len
,
3273 struct ieee80211_rx_status
*rx_status
)
3275 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3276 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
3278 struct ieee802_11_elems elems
;
3279 struct ieee80211_local
*local
= sdata
->local
;
3280 struct ieee80211_chanctx_conf
*chanctx_conf
;
3281 struct ieee80211_channel
*chan
;
3282 struct sta_info
*sta
;
3288 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3290 sdata_assert_lock(sdata
);
3292 /* Process beacon from the current BSS */
3293 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
3298 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3299 if (!chanctx_conf
) {
3304 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
3308 chan
= chanctx_conf
->def
.chan
;
3311 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
3312 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
3313 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
3314 len
- baselen
, false, &elems
);
3316 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3317 if (elems
.tim
&& !elems
.parse_error
) {
3318 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
3319 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
3321 ifmgd
->have_beacon
= true;
3322 ifmgd
->assoc_data
->need_beacon
= false;
3323 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3324 sdata
->vif
.bss_conf
.sync_tsf
=
3325 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3326 sdata
->vif
.bss_conf
.sync_device_ts
=
3327 rx_status
->device_timestamp
;
3329 sdata
->vif
.bss_conf
.sync_dtim_count
=
3330 elems
.tim
->dtim_count
;
3332 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3334 /* continue assoc process */
3335 ifmgd
->assoc_data
->timeout
= jiffies
;
3336 ifmgd
->assoc_data
->timeout_started
= true;
3337 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3341 if (!ifmgd
->associated
||
3342 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3344 bssid
= ifmgd
->associated
->bssid
;
3346 /* Track average RSSI from the Beacon frames of the current AP */
3347 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3348 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3349 ewma_beacon_signal_init(&ifmgd
->ave_beacon_signal
);
3350 ifmgd
->last_cqm_event_signal
= 0;
3351 ifmgd
->count_beacon_signal
= 1;
3352 ifmgd
->last_ave_beacon_signal
= 0;
3354 ifmgd
->count_beacon_signal
++;
3357 ewma_beacon_signal_add(&ifmgd
->ave_beacon_signal
, -rx_status
->signal
);
3359 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3360 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3361 int sig
= -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
3362 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3363 struct ieee80211_event event
= {
3368 * if signal crosses either of the boundaries, invoke callback
3369 * with appropriate parameters
3371 if (sig
> ifmgd
->rssi_max_thold
&&
3372 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3373 ifmgd
->last_ave_beacon_signal
= sig
;
3374 event
.u
.rssi
.data
= RSSI_EVENT_HIGH
;
3375 drv_event_callback(local
, sdata
, &event
);
3376 } else if (sig
< ifmgd
->rssi_min_thold
&&
3377 (last_sig
>= ifmgd
->rssi_max_thold
||
3379 ifmgd
->last_ave_beacon_signal
= sig
;
3380 event
.u
.rssi
.data
= RSSI_EVENT_LOW
;
3381 drv_event_callback(local
, sdata
, &event
);
3385 if (bss_conf
->cqm_rssi_thold
&&
3386 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3387 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3388 int sig
= -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
3389 int last_event
= ifmgd
->last_cqm_event_signal
;
3390 int thold
= bss_conf
->cqm_rssi_thold
;
3391 int hyst
= bss_conf
->cqm_rssi_hyst
;
3394 (last_event
== 0 || sig
< last_event
- hyst
)) {
3395 ifmgd
->last_cqm_event_signal
= sig
;
3396 ieee80211_cqm_rssi_notify(
3398 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3400 } else if (sig
> thold
&&
3401 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3402 ifmgd
->last_cqm_event_signal
= sig
;
3403 ieee80211_cqm_rssi_notify(
3405 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3410 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
3411 mlme_dbg_ratelimited(sdata
,
3412 "cancelling AP probe due to a received beacon\n");
3413 ieee80211_reset_ap_probe(sdata
);
3417 * Push the beacon loss detection into the future since
3418 * we are processing a beacon from the AP just now.
3420 ieee80211_sta_reset_beacon_monitor(sdata
);
3422 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3423 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3424 len
- baselen
, false, &elems
,
3425 care_about_ies
, ncrc
);
3427 if (ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
) &&
3428 ieee80211_check_tim(elems
.tim
, elems
.tim_len
, ifmgd
->aid
)) {
3429 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3430 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3431 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3432 ieee80211_hw_config(local
,
3433 IEEE80211_CONF_CHANGE_PS
);
3435 ieee80211_send_nullfunc(local
, sdata
, false);
3436 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3437 local
->pspolling
= true;
3440 * Here is assumed that the driver will be
3441 * able to send ps-poll frame and receive a
3442 * response even though power save mode is
3443 * enabled, but some drivers might require
3444 * to disable power save here. This needs
3445 * to be investigated.
3447 ieee80211_send_pspoll(local
, sdata
);
3451 if (sdata
->vif
.p2p
||
3452 sdata
->vif
.driver_flags
& IEEE80211_VIF_GET_NOA_UPDATE
) {
3453 struct ieee80211_p2p_noa_attr noa
= {};
3456 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3458 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3459 (u8
*) &noa
, sizeof(noa
));
3461 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3462 /* valid noa_attr and index changed */
3463 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3464 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3465 changed
|= BSS_CHANGED_P2P_PS
;
3467 * make sure we update all information, the CRC
3468 * mechanism doesn't look at P2P attributes.
3470 ifmgd
->beacon_crc_valid
= false;
3472 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3473 /* noa_attr not found and we had valid noa_attr before */
3474 sdata
->u
.mgd
.p2p_noa_index
= -1;
3475 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3476 changed
|= BSS_CHANGED_P2P_PS
;
3477 ifmgd
->beacon_crc_valid
= false;
3481 if (ifmgd
->csa_waiting_bcn
)
3482 ieee80211_chswitch_post_beacon(sdata
);
3485 * Update beacon timing and dtim count on every beacon appearance. This
3486 * will allow the driver to use the most updated values. Do it before
3487 * comparing this one with last received beacon.
3488 * IMPORTANT: These parameters would possibly be out of sync by the time
3489 * the driver will use them. The synchronized view is currently
3490 * guaranteed only in certain callbacks.
3492 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
3493 sdata
->vif
.bss_conf
.sync_tsf
=
3494 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3495 sdata
->vif
.bss_conf
.sync_device_ts
=
3496 rx_status
->device_timestamp
;
3498 sdata
->vif
.bss_conf
.sync_dtim_count
=
3499 elems
.tim
->dtim_count
;
3501 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3504 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3506 ifmgd
->beacon_crc
= ncrc
;
3507 ifmgd
->beacon_crc_valid
= true;
3509 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3511 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
3512 rx_status
->device_timestamp
,
3515 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
3516 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3517 elems
.wmm_param_len
))
3518 changed
|= BSS_CHANGED_QOS
;
3521 * If we haven't had a beacon before, tell the driver about the
3522 * DTIM period (and beacon timing if desired) now.
3524 if (!ifmgd
->have_beacon
) {
3525 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3527 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3529 bss_conf
->dtim_period
= 1;
3531 changed
|= BSS_CHANGED_BEACON_INFO
;
3532 ifmgd
->have_beacon
= true;
3534 mutex_lock(&local
->iflist_mtx
);
3535 ieee80211_recalc_ps(local
);
3536 mutex_unlock(&local
->iflist_mtx
);
3538 ieee80211_recalc_ps_vif(sdata
);
3541 if (elems
.erp_info
) {
3543 erp_value
= elems
.erp_info
[0];
3547 changed
|= ieee80211_handle_bss_capability(sdata
,
3548 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3549 erp_valid
, erp_value
);
3551 mutex_lock(&local
->sta_mtx
);
3552 sta
= sta_info_get(sdata
, bssid
);
3554 if (ieee80211_config_bw(sdata
, sta
,
3555 elems
.ht_cap_elem
, elems
.ht_operation
,
3556 elems
.vht_operation
, bssid
, &changed
)) {
3557 mutex_unlock(&local
->sta_mtx
);
3559 "failed to follow AP %pM bandwidth change, disconnect\n",
3561 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3562 WLAN_REASON_DEAUTH_LEAVING
,
3564 ieee80211_report_disconnect(sdata
, deauth_buf
,
3565 sizeof(deauth_buf
), true,
3566 WLAN_REASON_DEAUTH_LEAVING
);
3570 if (sta
&& elems
.opmode_notif
)
3571 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3573 mutex_unlock(&local
->sta_mtx
);
3575 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
, mgmt
,
3577 elems
.country_elem_len
,
3578 elems
.pwr_constr_elem
,
3579 elems
.cisco_dtpc_elem
);
3581 ieee80211_bss_info_change_notify(sdata
, changed
);
3584 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3585 struct sk_buff
*skb
)
3587 struct ieee80211_rx_status
*rx_status
;
3588 struct ieee80211_mgmt
*mgmt
;
3590 struct ieee802_11_elems elems
;
3593 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3594 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3595 fc
= le16_to_cpu(mgmt
->frame_control
);
3599 switch (fc
& IEEE80211_FCTL_STYPE
) {
3600 case IEEE80211_STYPE_BEACON
:
3601 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3603 case IEEE80211_STYPE_PROBE_RESP
:
3604 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3606 case IEEE80211_STYPE_AUTH
:
3607 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3609 case IEEE80211_STYPE_DEAUTH
:
3610 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3612 case IEEE80211_STYPE_DISASSOC
:
3613 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3615 case IEEE80211_STYPE_ASSOC_RESP
:
3616 case IEEE80211_STYPE_REASSOC_RESP
:
3617 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3619 case IEEE80211_STYPE_ACTION
:
3620 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3621 ies_len
= skb
->len
-
3622 offsetof(struct ieee80211_mgmt
,
3623 u
.action
.u
.chan_switch
.variable
);
3628 ieee802_11_parse_elems(
3629 mgmt
->u
.action
.u
.chan_switch
.variable
,
3630 ies_len
, true, &elems
);
3632 if (elems
.parse_error
)
3635 ieee80211_sta_process_chanswitch(sdata
,
3637 rx_status
->device_timestamp
,
3639 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3640 ies_len
= skb
->len
-
3641 offsetof(struct ieee80211_mgmt
,
3642 u
.action
.u
.ext_chan_switch
.variable
);
3647 ieee802_11_parse_elems(
3648 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3649 ies_len
, true, &elems
);
3651 if (elems
.parse_error
)
3654 /* for the handling code pretend this was also an IE */
3655 elems
.ext_chansw_ie
=
3656 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3658 ieee80211_sta_process_chanswitch(sdata
,
3660 rx_status
->device_timestamp
,
3665 sdata_unlock(sdata
);
3668 static void ieee80211_sta_timer(unsigned long data
)
3670 struct ieee80211_sub_if_data
*sdata
=
3671 (struct ieee80211_sub_if_data
*) data
;
3673 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3676 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3677 u8
*bssid
, u8 reason
, bool tx
)
3679 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3681 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3684 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
3688 static int ieee80211_auth(struct ieee80211_sub_if_data
*sdata
)
3690 struct ieee80211_local
*local
= sdata
->local
;
3691 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3692 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3697 sdata_assert_lock(sdata
);
3699 if (WARN_ON_ONCE(!auth_data
))
3704 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3705 sdata_info(sdata
, "authentication with %pM timed out\n",
3706 auth_data
->bss
->bssid
);
3709 * Most likely AP is not in the range so remove the
3710 * bss struct for that AP.
3712 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3717 drv_mgd_prepare_tx(local
, sdata
);
3719 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3720 auth_data
->bss
->bssid
, auth_data
->tries
,
3721 IEEE80211_AUTH_MAX_TRIES
);
3723 auth_data
->expected_transaction
= 2;
3725 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3726 trans
= auth_data
->sae_trans
;
3727 status
= auth_data
->sae_status
;
3728 auth_data
->expected_transaction
= trans
;
3731 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3732 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3733 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3735 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3736 auth_data
->data
, auth_data
->data_len
,
3737 auth_data
->bss
->bssid
,
3738 auth_data
->bss
->bssid
, NULL
, 0, 0,
3741 if (tx_flags
== 0) {
3742 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3743 auth_data
->timeout_started
= true;
3744 run_again(sdata
, auth_data
->timeout
);
3746 auth_data
->timeout
=
3747 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3748 auth_data
->timeout_started
= true;
3749 run_again(sdata
, auth_data
->timeout
);
3755 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3757 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3758 struct ieee80211_local
*local
= sdata
->local
;
3760 sdata_assert_lock(sdata
);
3762 assoc_data
->tries
++;
3763 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3764 sdata_info(sdata
, "association with %pM timed out\n",
3765 assoc_data
->bss
->bssid
);
3768 * Most likely AP is not in the range so remove the
3769 * bss struct for that AP.
3771 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3776 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3777 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3778 IEEE80211_ASSOC_MAX_TRIES
);
3779 ieee80211_send_assoc(sdata
);
3781 if (!ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3782 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3783 assoc_data
->timeout_started
= true;
3784 run_again(sdata
, assoc_data
->timeout
);
3786 assoc_data
->timeout
=
3787 round_jiffies_up(jiffies
+
3788 IEEE80211_ASSOC_TIMEOUT_LONG
);
3789 assoc_data
->timeout_started
= true;
3790 run_again(sdata
, assoc_data
->timeout
);
3796 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3797 __le16 fc
, bool acked
)
3799 struct ieee80211_local
*local
= sdata
->local
;
3801 sdata
->u
.mgd
.status_fc
= fc
;
3802 sdata
->u
.mgd
.status_acked
= acked
;
3803 sdata
->u
.mgd
.status_received
= true;
3805 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3808 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3810 struct ieee80211_local
*local
= sdata
->local
;
3811 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3815 if (ifmgd
->status_received
) {
3816 __le16 fc
= ifmgd
->status_fc
;
3817 bool status_acked
= ifmgd
->status_acked
;
3819 ifmgd
->status_received
= false;
3820 if (ifmgd
->auth_data
&& ieee80211_is_auth(fc
)) {
3822 ifmgd
->auth_data
->timeout
=
3823 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3824 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3826 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3828 ifmgd
->auth_data
->timeout_started
= true;
3829 } else if (ifmgd
->assoc_data
&&
3830 (ieee80211_is_assoc_req(fc
) ||
3831 ieee80211_is_reassoc_req(fc
))) {
3833 ifmgd
->assoc_data
->timeout
=
3834 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3835 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3837 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3839 ifmgd
->assoc_data
->timeout_started
= true;
3843 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3844 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3845 if (ifmgd
->auth_data
->done
) {
3847 * ok ... we waited for assoc but userspace didn't,
3848 * so let's just kill the auth data
3850 ieee80211_destroy_auth_data(sdata
, false);
3851 } else if (ieee80211_auth(sdata
)) {
3853 struct ieee80211_event event
= {
3855 .u
.mlme
.data
= AUTH_EVENT
,
3856 .u
.mlme
.status
= MLME_TIMEOUT
,
3859 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3861 ieee80211_destroy_auth_data(sdata
, false);
3863 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3864 drv_event_callback(sdata
->local
, sdata
, &event
);
3866 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3867 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3869 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3870 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3871 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3872 ieee80211_do_assoc(sdata
)) {
3873 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3874 struct ieee80211_event event
= {
3876 .u
.mlme
.data
= ASSOC_EVENT
,
3877 .u
.mlme
.status
= MLME_TIMEOUT
,
3880 ieee80211_destroy_assoc_data(sdata
, false);
3881 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3882 drv_event_callback(sdata
->local
, sdata
, &event
);
3884 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3885 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3887 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3888 ifmgd
->associated
) {
3892 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3894 if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
))
3895 max_tries
= max_nullfunc_tries
;
3897 max_tries
= max_probe_tries
;
3899 /* ACK received for nullfunc probing frame */
3900 if (!ifmgd
->probe_send_count
)
3901 ieee80211_reset_ap_probe(sdata
);
3902 else if (ifmgd
->nullfunc_failed
) {
3903 if (ifmgd
->probe_send_count
< max_tries
) {
3905 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3906 bssid
, ifmgd
->probe_send_count
,
3908 ieee80211_mgd_probe_ap_send(sdata
);
3911 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3913 ieee80211_sta_connection_lost(sdata
, bssid
,
3914 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3917 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3918 run_again(sdata
, ifmgd
->probe_timeout
);
3919 else if (ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
3921 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3922 bssid
, probe_wait_ms
);
3923 ieee80211_sta_connection_lost(sdata
, bssid
,
3924 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3925 } else if (ifmgd
->probe_send_count
< max_tries
) {
3927 "No probe response from AP %pM after %dms, try %d/%i\n",
3928 bssid
, probe_wait_ms
,
3929 ifmgd
->probe_send_count
, max_tries
);
3930 ieee80211_mgd_probe_ap_send(sdata
);
3933 * We actually lost the connection ... or did we?
3937 "No probe response from AP %pM after %dms, disconnecting.\n",
3938 bssid
, probe_wait_ms
);
3940 ieee80211_sta_connection_lost(sdata
, bssid
,
3941 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3945 sdata_unlock(sdata
);
3948 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3950 struct ieee80211_sub_if_data
*sdata
=
3951 (struct ieee80211_sub_if_data
*) data
;
3952 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3954 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3957 sdata
->u
.mgd
.connection_loss
= false;
3958 ieee80211_queue_work(&sdata
->local
->hw
,
3959 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3962 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3964 struct ieee80211_sub_if_data
*sdata
=
3965 (struct ieee80211_sub_if_data
*) data
;
3966 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3967 struct ieee80211_local
*local
= sdata
->local
;
3969 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3972 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3975 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3977 struct ieee80211_sub_if_data
*sdata
=
3978 container_of(work
, struct ieee80211_sub_if_data
,
3979 u
.mgd
.monitor_work
);
3981 ieee80211_mgd_probe_ap(sdata
, false);
3984 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3986 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3987 __ieee80211_stop_poll(sdata
);
3989 /* let's probe the connection once */
3990 if (!ieee80211_hw_check(&sdata
->local
->hw
, CONNECTION_MONITOR
))
3991 ieee80211_queue_work(&sdata
->local
->hw
,
3992 &sdata
->u
.mgd
.monitor_work
);
3997 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data
*sdata
)
3999 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4000 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4004 if (ifmgd
->auth_data
|| ifmgd
->assoc_data
) {
4005 const u8
*bssid
= ifmgd
->auth_data
?
4006 ifmgd
->auth_data
->bss
->bssid
:
4007 ifmgd
->assoc_data
->bss
->bssid
;
4010 * If we are trying to authenticate / associate while suspending,
4011 * cfg80211 won't know and won't actually abort those attempts,
4012 * thus we need to do that ourselves.
4014 ieee80211_send_deauth_disassoc(sdata
, bssid
,
4015 IEEE80211_STYPE_DEAUTH
,
4016 WLAN_REASON_DEAUTH_LEAVING
,
4018 if (ifmgd
->assoc_data
)
4019 ieee80211_destroy_assoc_data(sdata
, false);
4020 if (ifmgd
->auth_data
)
4021 ieee80211_destroy_auth_data(sdata
, false);
4022 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4023 IEEE80211_DEAUTH_FRAME_LEN
);
4026 /* This is a bit of a hack - we should find a better and more generic
4027 * solution to this. Normally when suspending, cfg80211 will in fact
4028 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4029 * auth (not so important) or assoc (this is the problem) process.
4031 * As a consequence, it can happen that we are in the process of both
4032 * associating and suspending, and receive an association response
4033 * after cfg80211 has checked if it needs to disconnect, but before
4034 * we actually set the flag to drop incoming frames. This will then
4035 * cause the workqueue flush to process the association response in
4036 * the suspend, resulting in a successful association just before it
4037 * tries to remove the interface from the driver, which now though
4038 * has a channel context assigned ... this results in issues.
4040 * To work around this (for now) simply deauth here again if we're
4043 if (ifmgd
->associated
&& !sdata
->local
->wowlan
) {
4045 struct cfg80211_deauth_request req
= {
4046 .reason_code
= WLAN_REASON_DEAUTH_LEAVING
,
4050 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
4051 ieee80211_mgd_deauth(sdata
, &req
);
4054 sdata_unlock(sdata
);
4057 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
4059 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4062 if (!ifmgd
->associated
) {
4063 sdata_unlock(sdata
);
4067 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
4068 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
4069 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
4070 ieee80211_sta_connection_lost(sdata
,
4071 ifmgd
->associated
->bssid
,
4072 WLAN_REASON_UNSPECIFIED
,
4074 sdata_unlock(sdata
);
4077 sdata_unlock(sdata
);
4081 /* interface setup */
4082 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
4084 struct ieee80211_if_managed
*ifmgd
;
4086 ifmgd
= &sdata
->u
.mgd
;
4087 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
4088 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
4089 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
4090 ieee80211_beacon_connection_loss_work
);
4091 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
4092 ieee80211_csa_connection_drop_work
);
4093 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
4094 INIT_DELAYED_WORK(&ifmgd
->tdls_peer_del_work
,
4095 ieee80211_tdls_peer_del_work
);
4096 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
4097 (unsigned long) sdata
);
4098 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
4099 (unsigned long) sdata
);
4100 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
4101 (unsigned long) sdata
);
4102 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
4103 (unsigned long) sdata
);
4104 INIT_DELAYED_WORK(&ifmgd
->tx_tspec_wk
,
4105 ieee80211_sta_handle_tspec_ac_params_wk
);
4108 ifmgd
->powersave
= sdata
->wdev
.ps
;
4109 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
4110 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
4111 ifmgd
->p2p_noa_index
= -1;
4113 if (sdata
->local
->hw
.wiphy
->features
& NL80211_FEATURE_DYNAMIC_SMPS
)
4114 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
4116 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
4118 /* Setup TDLS data */
4119 spin_lock_init(&ifmgd
->teardown_lock
);
4120 ifmgd
->teardown_skb
= NULL
;
4121 ifmgd
->orig_teardown_skb
= NULL
;
4124 /* scan finished notification */
4125 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
4127 struct ieee80211_sub_if_data
*sdata
;
4129 /* Restart STA timers */
4131 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4132 if (ieee80211_sdata_running(sdata
))
4133 ieee80211_restart_sta_timer(sdata
);
4138 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
4139 struct cfg80211_bss
*cbss
)
4141 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4142 const u8
*ht_cap_ie
, *vht_cap_ie
;
4143 const struct ieee80211_ht_cap
*ht_cap
;
4144 const struct ieee80211_vht_cap
*vht_cap
;
4147 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
4150 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4151 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
4152 ht_cap
= (void *)(ht_cap_ie
+ 2);
4153 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
4155 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4156 * "Tx Unequal Modulation Supported" fields.
4160 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
4163 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4164 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
4168 vht_cap
= (void *)(vht_cap_ie
+ 2);
4169 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
4170 for (nss
= 8; nss
> 0; nss
--) {
4171 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
4172 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
4175 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4176 chains
= max(chains
, nss
);
4182 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
4183 struct cfg80211_bss
*cbss
)
4185 struct ieee80211_local
*local
= sdata
->local
;
4186 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4187 const struct ieee80211_ht_cap
*ht_cap
= NULL
;
4188 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
4189 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
4190 struct ieee80211_supported_band
*sband
;
4191 struct cfg80211_chan_def chandef
;
4196 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4198 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
4199 IEEE80211_STA_DISABLE_80P80MHZ
|
4200 IEEE80211_STA_DISABLE_160MHZ
);
4204 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
4205 sband
->ht_cap
.ht_supported
) {
4206 const u8
*ht_oper_ie
, *ht_cap_ie
;
4208 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
4209 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
4210 ht_oper
= (void *)(ht_oper_ie
+ 2);
4212 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4213 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
))
4214 ht_cap
= (void *)(ht_cap_ie
+ 2);
4217 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4222 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4223 sband
->vht_cap
.vht_supported
) {
4224 const u8
*vht_oper_ie
, *vht_cap
;
4226 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
4227 WLAN_EID_VHT_OPERATION
);
4228 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
4229 vht_oper
= (void *)(vht_oper_ie
+ 2);
4230 if (vht_oper
&& !ht_oper
) {
4233 "AP advertised VHT without HT, disabling both\n");
4234 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4235 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4238 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4239 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
4240 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4245 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4247 for (i
= 0; i
< sband
->n_channels
; i
++) {
4248 if (sband
->channels
[i
].flags
& (IEEE80211_CHAN_DISABLED
|
4249 IEEE80211_CHAN_NO_80MHZ
))
4257 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4259 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
4261 ht_cap
, ht_oper
, vht_oper
,
4264 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
4269 /* will change later if needed */
4270 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4272 mutex_lock(&local
->mtx
);
4274 * If this fails (possibly due to channel context sharing
4275 * on incompatible channels, e.g. 80+80 and 160 sharing the
4276 * same control channel) try to use a smaller bandwidth.
4278 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4279 IEEE80211_CHANCTX_SHARED
);
4281 /* don't downgrade for 5 and 10 MHz channels, though. */
4282 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
4283 chandef
.width
== NL80211_CHAN_WIDTH_10
)
4286 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
4287 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
4288 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4289 IEEE80211_CHANCTX_SHARED
);
4292 mutex_unlock(&local
->mtx
);
4296 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
4297 struct cfg80211_bss
*cbss
, bool assoc
,
4300 struct ieee80211_local
*local
= sdata
->local
;
4301 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4302 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
4303 struct sta_info
*new_sta
= NULL
;
4304 struct ieee80211_supported_band
*sband
;
4305 bool have_sta
= false;
4308 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4310 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
4315 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
4320 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
4325 if (new_sta
|| override
) {
4326 err
= ieee80211_prep_channel(sdata
, cbss
);
4329 sta_info_free(local
, new_sta
);
4335 u32 rates
= 0, basic_rates
= 0;
4336 bool have_higher_than_11mbit
;
4337 int min_rate
= INT_MAX
, min_rate_index
= -1;
4338 struct ieee80211_chanctx_conf
*chanctx_conf
;
4339 const struct cfg80211_bss_ies
*ies
;
4340 int shift
= ieee80211_vif_get_shift(&sdata
->vif
);
4344 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4345 if (WARN_ON(!chanctx_conf
)) {
4347 sta_info_free(local
, new_sta
);
4350 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
4353 ieee80211_get_rates(sband
, bss
->supp_rates
,
4354 bss
->supp_rates_len
,
4355 &rates
, &basic_rates
,
4356 &have_higher_than_11mbit
,
4357 &min_rate
, &min_rate_index
,
4361 * This used to be a workaround for basic rates missing
4362 * in the association response frame. Now that we no
4363 * longer use the basic rates from there, it probably
4364 * doesn't happen any more, but keep the workaround so
4365 * in case some *other* APs are buggy in different ways
4366 * we can connect -- with a warning.
4368 if (!basic_rates
&& min_rate_index
>= 0) {
4370 "No basic rates, using min rate instead\n");
4371 basic_rates
= BIT(min_rate_index
);
4374 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
4375 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
4377 /* cf. IEEE 802.11 9.2.12 */
4378 if (cbss
->channel
->band
== NL80211_BAND_2GHZ
&&
4379 have_higher_than_11mbit
)
4380 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
4382 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
4384 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
4386 /* set timing information */
4387 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
4389 ies
= rcu_dereference(cbss
->beacon_ies
);
4393 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4394 sdata
->vif
.bss_conf
.sync_device_ts
=
4395 bss
->device_ts_beacon
;
4396 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4397 ies
->data
, ies
->len
);
4398 if (tim_ie
&& tim_ie
[1] >= 2)
4399 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
4401 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4402 } else if (!ieee80211_hw_check(&sdata
->local
->hw
,
4403 TIMING_BEACON_ONLY
)) {
4404 ies
= rcu_dereference(cbss
->proberesp_ies
);
4405 /* must be non-NULL since beacon IEs were NULL */
4406 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4407 sdata
->vif
.bss_conf
.sync_device_ts
=
4408 bss
->device_ts_presp
;
4409 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4411 sdata
->vif
.bss_conf
.sync_tsf
= 0;
4412 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
4413 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4417 /* tell driver about BSSID, basic rates and timing */
4418 ieee80211_bss_info_change_notify(sdata
,
4419 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
4420 BSS_CHANGED_BEACON_INT
);
4423 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
4425 err
= sta_info_insert(new_sta
);
4429 "failed to insert STA entry for the AP (error %d)\n",
4434 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4436 /* Cancel scan to ensure that nothing interferes with connection */
4437 if (local
->scanning
)
4438 ieee80211_scan_cancel(local
);
4444 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4445 struct cfg80211_auth_request
*req
)
4447 struct ieee80211_local
*local
= sdata
->local
;
4448 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4449 struct ieee80211_mgd_auth_data
*auth_data
;
4453 /* prepare auth data structure */
4455 switch (req
->auth_type
) {
4456 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4457 auth_alg
= WLAN_AUTH_OPEN
;
4459 case NL80211_AUTHTYPE_SHARED_KEY
:
4460 if (IS_ERR(local
->wep_tx_tfm
))
4462 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4464 case NL80211_AUTHTYPE_FT
:
4465 auth_alg
= WLAN_AUTH_FT
;
4467 case NL80211_AUTHTYPE_NETWORK_EAP
:
4468 auth_alg
= WLAN_AUTH_LEAP
;
4470 case NL80211_AUTHTYPE_SAE
:
4471 auth_alg
= WLAN_AUTH_SAE
;
4477 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4478 req
->ie_len
, GFP_KERNEL
);
4482 auth_data
->bss
= req
->bss
;
4484 if (req
->sae_data_len
>= 4) {
4485 __le16
*pos
= (__le16
*) req
->sae_data
;
4486 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4487 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4488 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4489 req
->sae_data_len
- 4);
4490 auth_data
->data_len
+= req
->sae_data_len
- 4;
4493 if (req
->ie
&& req
->ie_len
) {
4494 memcpy(&auth_data
->data
[auth_data
->data_len
],
4495 req
->ie
, req
->ie_len
);
4496 auth_data
->data_len
+= req
->ie_len
;
4499 if (req
->key
&& req
->key_len
) {
4500 auth_data
->key_len
= req
->key_len
;
4501 auth_data
->key_idx
= req
->key_idx
;
4502 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4505 auth_data
->algorithm
= auth_alg
;
4507 /* try to authenticate/probe */
4509 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4510 ifmgd
->assoc_data
) {
4515 if (ifmgd
->auth_data
)
4516 ieee80211_destroy_auth_data(sdata
, false);
4518 /* prep auth_data so we don't go into idle on disassoc */
4519 ifmgd
->auth_data
= auth_data
;
4521 if (ifmgd
->associated
) {
4522 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4525 "disconnect from AP %pM for new auth to %pM\n",
4526 ifmgd
->associated
->bssid
, req
->bss
->bssid
);
4527 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4528 WLAN_REASON_UNSPECIFIED
,
4531 ieee80211_report_disconnect(sdata
, frame_buf
,
4532 sizeof(frame_buf
), true,
4533 WLAN_REASON_UNSPECIFIED
);
4536 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4538 err
= ieee80211_prep_connection(sdata
, req
->bss
, false, false);
4542 err
= ieee80211_auth(sdata
);
4544 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4548 /* hold our own reference */
4549 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4553 eth_zero_addr(ifmgd
->bssid
);
4554 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4555 ifmgd
->auth_data
= NULL
;
4556 mutex_lock(&sdata
->local
->mtx
);
4557 ieee80211_vif_release_channel(sdata
);
4558 mutex_unlock(&sdata
->local
->mtx
);
4564 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4565 struct cfg80211_assoc_request
*req
)
4567 struct ieee80211_local
*local
= sdata
->local
;
4568 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4569 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4570 struct ieee80211_mgd_assoc_data
*assoc_data
;
4571 const struct cfg80211_bss_ies
*beacon_ies
;
4572 struct ieee80211_supported_band
*sband
;
4573 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4575 bool override
= false;
4577 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4582 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4588 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4589 assoc_data
->ssid_len
= ssidie
[1];
4592 if (ifmgd
->associated
) {
4593 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4596 "disconnect from AP %pM for new assoc to %pM\n",
4597 ifmgd
->associated
->bssid
, req
->bss
->bssid
);
4598 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4599 WLAN_REASON_UNSPECIFIED
,
4602 ieee80211_report_disconnect(sdata
, frame_buf
,
4603 sizeof(frame_buf
), true,
4604 WLAN_REASON_UNSPECIFIED
);
4607 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4612 if (ifmgd
->assoc_data
) {
4617 if (ifmgd
->auth_data
) {
4620 /* keep sta info, bssid if matching */
4621 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4622 ieee80211_destroy_auth_data(sdata
, match
);
4625 /* prepare assoc data */
4627 ifmgd
->beacon_crc_valid
= false;
4629 assoc_data
->wmm
= bss
->wmm_used
&&
4630 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4633 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4634 * We still associate in non-HT mode (11a/b/g) if any one of these
4635 * ciphers is configured as pairwise.
4636 * We can set this to true for non-11n hardware, that'll be checked
4637 * separately along with the peer capabilities.
4639 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4640 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4641 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4642 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4643 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4644 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4645 netdev_info(sdata
->dev
,
4646 "disabling HT/VHT due to WEP/TKIP use\n");
4650 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4651 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4652 if (!sband
->ht_cap
.ht_supported
||
4653 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4654 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4655 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4656 if (!bss
->wmm_used
&&
4657 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4658 netdev_info(sdata
->dev
,
4659 "disabling HT as WMM/QoS is not supported by the AP\n");
4662 /* disable VHT if we don't support it or the AP doesn't use WMM */
4663 if (!sband
->vht_cap
.vht_supported
||
4664 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4665 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4666 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4667 if (!bss
->wmm_used
&&
4668 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4669 netdev_info(sdata
->dev
,
4670 "disabling VHT as WMM/QoS is not supported by the AP\n");
4673 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4674 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4675 sizeof(ifmgd
->ht_capa_mask
));
4677 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4678 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4679 sizeof(ifmgd
->vht_capa_mask
));
4681 if (req
->ie
&& req
->ie_len
) {
4682 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4683 assoc_data
->ie_len
= req
->ie_len
;
4686 assoc_data
->bss
= req
->bss
;
4688 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4689 if (ifmgd
->powersave
)
4690 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4692 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4694 sdata
->smps_mode
= ifmgd
->req_smps
;
4696 assoc_data
->capability
= req
->bss
->capability
;
4697 assoc_data
->supp_rates
= bss
->supp_rates
;
4698 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4701 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4702 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4703 assoc_data
->ap_ht_param
=
4704 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4706 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4707 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4708 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4709 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4710 sizeof(struct ieee80211_vht_cap
));
4712 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4715 if (WARN((sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
) &&
4716 ieee80211_hw_check(&local
->hw
, PS_NULLFUNC_STACK
),
4717 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4718 sdata
->vif
.driver_flags
&= ~IEEE80211_VIF_SUPPORTS_UAPSD
;
4720 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4721 (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
)) {
4722 assoc_data
->uapsd
= true;
4723 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4725 assoc_data
->uapsd
= false;
4726 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4729 if (req
->prev_bssid
)
4730 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4733 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4734 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4736 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4737 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4740 if (req
->flags
& ASSOC_REQ_USE_RRM
)
4741 ifmgd
->flags
|= IEEE80211_STA_ENABLE_RRM
;
4743 ifmgd
->flags
&= ~IEEE80211_STA_ENABLE_RRM
;
4745 if (req
->crypto
.control_port
)
4746 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4748 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4750 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4751 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4752 sdata
->encrypt_headroom
= ieee80211_cs_headroom(local
, &req
->crypto
,
4755 /* kick off associate process */
4757 ifmgd
->assoc_data
= assoc_data
;
4758 ifmgd
->dtim_period
= 0;
4759 ifmgd
->have_beacon
= false;
4761 /* override HT/VHT configuration only if the AP and we support it */
4762 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
4763 struct ieee80211_sta_ht_cap sta_ht_cap
;
4765 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
4768 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
4769 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
4771 /* check for 40 MHz disable override */
4772 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
) &&
4773 sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
4774 !(sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
))
4777 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4778 req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4782 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4783 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4784 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4787 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4788 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4790 err
= ieee80211_prep_connection(sdata
, req
->bss
, true, override
);
4795 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4797 if (ieee80211_hw_check(&sdata
->local
->hw
, NEED_DTIM_BEFORE_ASSOC
) &&
4800 * Wait up to one beacon interval ...
4801 * should this be more if we miss one?
4803 sdata_info(sdata
, "waiting for beacon from %pM\n",
4805 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4806 assoc_data
->timeout_started
= true;
4807 assoc_data
->need_beacon
= true;
4808 } else if (beacon_ies
) {
4809 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4814 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4815 const struct ieee80211_tim_ie
*tim
;
4816 tim
= (void *)(tim_ie
+ 2);
4817 ifmgd
->dtim_period
= tim
->dtim_period
;
4818 dtim_count
= tim
->dtim_count
;
4820 ifmgd
->have_beacon
= true;
4821 assoc_data
->timeout
= jiffies
;
4822 assoc_data
->timeout_started
= true;
4824 if (ieee80211_hw_check(&local
->hw
, TIMING_BEACON_ONLY
)) {
4825 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4826 sdata
->vif
.bss_conf
.sync_device_ts
=
4827 bss
->device_ts_beacon
;
4828 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4831 assoc_data
->timeout
= jiffies
;
4832 assoc_data
->timeout_started
= true;
4836 run_again(sdata
, assoc_data
->timeout
);
4838 if (bss
->corrupt_data
) {
4839 char *corrupt_type
= "data";
4840 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4841 if (bss
->corrupt_data
&
4842 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4843 corrupt_type
= "beacon and probe response";
4845 corrupt_type
= "beacon";
4846 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4847 corrupt_type
= "probe response";
4848 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4854 eth_zero_addr(ifmgd
->bssid
);
4855 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4856 ifmgd
->assoc_data
= NULL
;
4862 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4863 struct cfg80211_deauth_request
*req
)
4865 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4866 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4867 bool tx
= !req
->local_state_change
;
4869 if (ifmgd
->auth_data
&&
4870 ether_addr_equal(ifmgd
->auth_data
->bss
->bssid
, req
->bssid
)) {
4872 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4873 req
->bssid
, req
->reason_code
,
4874 ieee80211_get_reason_code_string(req
->reason_code
));
4876 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4877 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4878 IEEE80211_STYPE_DEAUTH
,
4879 req
->reason_code
, tx
,
4881 ieee80211_destroy_auth_data(sdata
, false);
4882 ieee80211_report_disconnect(sdata
, frame_buf
,
4883 sizeof(frame_buf
), true,
4889 if (ifmgd
->assoc_data
&&
4890 ether_addr_equal(ifmgd
->assoc_data
->bss
->bssid
, req
->bssid
)) {
4892 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4893 req
->bssid
, req
->reason_code
,
4894 ieee80211_get_reason_code_string(req
->reason_code
));
4896 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4897 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4898 IEEE80211_STYPE_DEAUTH
,
4899 req
->reason_code
, tx
,
4901 ieee80211_destroy_assoc_data(sdata
, false);
4902 ieee80211_report_disconnect(sdata
, frame_buf
,
4903 sizeof(frame_buf
), true,
4908 if (ifmgd
->associated
&&
4909 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4911 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4912 req
->bssid
, req
->reason_code
,
4913 ieee80211_get_reason_code_string(req
->reason_code
));
4915 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4916 req
->reason_code
, tx
, frame_buf
);
4917 ieee80211_report_disconnect(sdata
, frame_buf
,
4918 sizeof(frame_buf
), true,
4926 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4927 struct cfg80211_disassoc_request
*req
)
4929 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4931 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4934 * cfg80211 should catch this ... but it's racy since
4935 * we can receive a disassoc frame, process it, hand it
4936 * to cfg80211 while that's in a locked section already
4937 * trying to tell us that the user wants to disconnect.
4939 if (ifmgd
->associated
!= req
->bss
)
4943 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4944 req
->bss
->bssid
, req
->reason_code
, ieee80211_get_reason_code_string(req
->reason_code
));
4946 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4947 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4948 req
->reason_code
, !req
->local_state_change
,
4951 ieee80211_report_disconnect(sdata
, frame_buf
, sizeof(frame_buf
), true,
4957 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4959 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4962 * Make sure some work items will not run after this,
4963 * they will not do anything but might not have been
4964 * cancelled when disconnecting.
4966 cancel_work_sync(&ifmgd
->monitor_work
);
4967 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4968 cancel_work_sync(&ifmgd
->request_smps_work
);
4969 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4970 cancel_work_sync(&ifmgd
->chswitch_work
);
4971 cancel_delayed_work_sync(&ifmgd
->tdls_peer_del_work
);
4974 if (ifmgd
->assoc_data
) {
4975 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
4976 ieee80211_destroy_assoc_data(sdata
, false);
4977 cfg80211_assoc_timeout(sdata
->dev
, bss
);
4979 if (ifmgd
->auth_data
)
4980 ieee80211_destroy_auth_data(sdata
, false);
4981 spin_lock_bh(&ifmgd
->teardown_lock
);
4982 if (ifmgd
->teardown_skb
) {
4983 kfree_skb(ifmgd
->teardown_skb
);
4984 ifmgd
->teardown_skb
= NULL
;
4985 ifmgd
->orig_teardown_skb
= NULL
;
4987 spin_unlock_bh(&ifmgd
->teardown_lock
);
4988 del_timer_sync(&ifmgd
->timer
);
4989 sdata_unlock(sdata
);
4992 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4993 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4996 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4998 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
5000 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
5002 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
5004 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif
*vif
, gfp_t gfp
)
5006 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
5008 trace_api_cqm_beacon_loss_notify(sdata
->local
, sdata
);
5010 cfg80211_cqm_beacon_loss_notify(sdata
->dev
, gfp
);
5012 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify
);