2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35 #define IEEE80211_AUTH_MAX_TRIES 3
36 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
41 static int max_nullfunc_tries
= 2;
42 module_param(max_nullfunc_tries
, int, 0644);
43 MODULE_PARM_DESC(max_nullfunc_tries
,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
46 static int max_probe_tries
= 5;
47 module_param(max_probe_tries
, int, 0644);
48 MODULE_PARM_DESC(max_probe_tries
,
49 "Maximum probe tries before disconnecting (reason 4).");
52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
59 static int beacon_loss_count
= 7;
60 module_param(beacon_loss_count
, int, 0644);
61 MODULE_PARM_DESC(beacon_loss_count
,
62 "Number of beacon intervals before we decide beacon was lost.");
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
68 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
70 * Time we wait for a probe response after sending
71 * a probe request because of beacon loss or for
72 * checking the connection still works.
74 static int probe_wait_ms
= 500;
75 module_param(probe_wait_ms
, int, 0644);
76 MODULE_PARM_DESC(probe_wait_ms
,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
81 * Weight given to the latest Beacon frame when calculating average signal
82 * strength for Beacon frames received in the current BSS. This must be
85 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
88 * How many Beacon frames need to have been used in average signal strength
89 * before starting to indicate signal change events.
91 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
94 * We can have multiple work items (and connection probing)
95 * scheduling this timer, but we need to take care to only
96 * reschedule it when it should fire _earlier_ than it was
97 * asked for before, or if it's not pending right now. This
98 * function ensures that. Note that it then is required to
99 * run this function for all timeouts after the first one
100 * has happened -- the work that runs from this timer will
103 static void run_again(struct ieee80211_sub_if_data
*sdata
,
104 unsigned long timeout
)
106 sdata_assert_lock(sdata
);
108 if (!timer_pending(&sdata
->u
.mgd
.timer
) ||
109 time_before(timeout
, sdata
->u
.mgd
.timer
.expires
))
110 mod_timer(&sdata
->u
.mgd
.timer
, timeout
);
113 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
115 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
118 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
121 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
122 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
125 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
127 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
129 if (unlikely(!sdata
->u
.mgd
.associated
))
132 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
135 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
136 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
138 ifmgd
->probe_send_count
= 0;
141 static int ecw2cw(int ecw
)
143 return (1 << ecw
) - 1;
146 static u32
chandef_downgrade(struct cfg80211_chan_def
*c
)
152 case NL80211_CHAN_WIDTH_20
:
153 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
154 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
156 case NL80211_CHAN_WIDTH_40
:
157 c
->width
= NL80211_CHAN_WIDTH_20
;
158 c
->center_freq1
= c
->chan
->center_freq
;
159 ret
= IEEE80211_STA_DISABLE_40MHZ
|
160 IEEE80211_STA_DISABLE_VHT
;
162 case NL80211_CHAN_WIDTH_80
:
163 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
167 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
168 c
->width
= NL80211_CHAN_WIDTH_40
;
169 ret
= IEEE80211_STA_DISABLE_VHT
;
171 case NL80211_CHAN_WIDTH_80P80
:
173 c
->width
= NL80211_CHAN_WIDTH_80
;
174 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
175 IEEE80211_STA_DISABLE_160MHZ
;
177 case NL80211_CHAN_WIDTH_160
:
179 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
182 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
183 c
->width
= NL80211_CHAN_WIDTH_80
;
184 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
185 IEEE80211_STA_DISABLE_160MHZ
;
188 case NL80211_CHAN_WIDTH_20_NOHT
:
190 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
191 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
193 case NL80211_CHAN_WIDTH_5
:
194 case NL80211_CHAN_WIDTH_10
:
197 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
201 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
207 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
208 struct ieee80211_supported_band
*sband
,
209 struct ieee80211_channel
*channel
,
210 const struct ieee80211_ht_operation
*ht_oper
,
211 const struct ieee80211_vht_operation
*vht_oper
,
212 struct cfg80211_chan_def
*chandef
, bool verbose
)
214 struct cfg80211_chan_def vht_chandef
;
217 chandef
->chan
= channel
;
218 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
219 chandef
->center_freq1
= channel
->center_freq
;
220 chandef
->center_freq2
= 0;
222 if (!ht_oper
|| !sband
->ht_cap
.ht_supported
) {
223 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
227 chandef
->width
= NL80211_CHAN_WIDTH_20
;
229 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
231 /* check that channel matches the right operating channel */
232 if (channel
->center_freq
!= ht_cfreq
) {
234 * It's possible that some APs are confused here;
235 * Netgear WNDR3700 sometimes reports 4 higher than
236 * the actual channel in association responses, but
237 * since we look at probe response/beacon data here
242 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
243 channel
->center_freq
, ht_cfreq
,
244 ht_oper
->primary_chan
, channel
->band
);
245 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
249 /* check 40 MHz support, if we have it */
250 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
251 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
252 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
253 chandef
->width
= NL80211_CHAN_WIDTH_40
;
254 chandef
->center_freq1
+= 10;
256 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
257 chandef
->width
= NL80211_CHAN_WIDTH_40
;
258 chandef
->center_freq1
-= 10;
262 /* 40 MHz (and 80 MHz) must be supported for VHT */
263 ret
= IEEE80211_STA_DISABLE_VHT
;
264 /* also mark 40 MHz disabled */
265 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
269 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
270 ret
= IEEE80211_STA_DISABLE_VHT
;
274 vht_chandef
.chan
= channel
;
275 vht_chandef
.center_freq1
=
276 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
278 vht_chandef
.center_freq2
= 0;
280 switch (vht_oper
->chan_width
) {
281 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
282 vht_chandef
.width
= chandef
->width
;
284 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
285 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
287 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
288 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
290 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
291 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
292 vht_chandef
.center_freq2
=
293 ieee80211_channel_to_frequency(
294 vht_oper
->center_freq_seg2_idx
,
300 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
301 vht_oper
->chan_width
);
302 ret
= IEEE80211_STA_DISABLE_VHT
;
306 if (!cfg80211_chandef_valid(&vht_chandef
)) {
309 "AP VHT information is invalid, disable VHT\n");
310 ret
= IEEE80211_STA_DISABLE_VHT
;
314 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
319 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
322 "AP VHT information doesn't match HT, disable VHT\n");
323 ret
= IEEE80211_STA_DISABLE_VHT
;
327 *chandef
= vht_chandef
;
332 /* don't print the message below for VHT mismatch if VHT is disabled */
333 if (ret
& IEEE80211_STA_DISABLE_VHT
)
334 vht_chandef
= *chandef
;
336 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
337 IEEE80211_CHAN_DISABLED
)) {
338 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
339 ret
= IEEE80211_STA_DISABLE_HT
|
340 IEEE80211_STA_DISABLE_VHT
;
344 ret
|= chandef_downgrade(chandef
);
347 if (chandef
->width
!= vht_chandef
.width
&& verbose
)
349 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
351 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
355 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
356 struct sta_info
*sta
,
357 const struct ieee80211_ht_operation
*ht_oper
,
358 const struct ieee80211_vht_operation
*vht_oper
,
359 const u8
*bssid
, u32
*changed
)
361 struct ieee80211_local
*local
= sdata
->local
;
362 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
363 struct ieee80211_supported_band
*sband
;
364 struct ieee80211_channel
*chan
;
365 struct cfg80211_chan_def chandef
;
368 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
371 /* if HT was/is disabled, don't track any bandwidth changes */
372 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
375 /* don't check VHT if we associated as non-VHT station */
376 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
379 if (WARN_ON_ONCE(!sta
))
382 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
383 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
385 /* calculate new channel (type) based on HT/VHT operation IEs */
386 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
, ht_oper
,
387 vht_oper
, &chandef
, false);
390 * Downgrade the new channel if we associated with restricted
391 * capabilities. For example, if we associated as a 20 MHz STA
392 * to a 40 MHz AP (due to regulatory, capabilities or config
393 * reasons) then switching to a 40 MHz channel now won't do us
394 * any good -- we couldn't use it with the AP.
396 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
397 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
398 flags
|= chandef_downgrade(&chandef
);
399 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
400 chandef
.width
== NL80211_CHAN_WIDTH_160
)
401 flags
|= chandef_downgrade(&chandef
);
402 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
403 chandef
.width
> NL80211_CHAN_WIDTH_20
)
404 flags
|= chandef_downgrade(&chandef
);
406 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
410 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
411 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
412 chandef
.center_freq1
, chandef
.center_freq2
);
414 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
415 IEEE80211_STA_DISABLE_VHT
|
416 IEEE80211_STA_DISABLE_40MHZ
|
417 IEEE80211_STA_DISABLE_80P80MHZ
|
418 IEEE80211_STA_DISABLE_160MHZ
)) ||
419 !cfg80211_chandef_valid(&chandef
)) {
421 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
426 switch (chandef
.width
) {
427 case NL80211_CHAN_WIDTH_20_NOHT
:
428 case NL80211_CHAN_WIDTH_20
:
429 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
431 case NL80211_CHAN_WIDTH_40
:
432 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
434 case NL80211_CHAN_WIDTH_80
:
435 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
437 case NL80211_CHAN_WIDTH_80P80
:
438 case NL80211_CHAN_WIDTH_160
:
439 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
445 if (new_sta_bw
> sta
->cur_max_bandwidth
)
446 new_sta_bw
= sta
->cur_max_bandwidth
;
448 if (new_sta_bw
< sta
->sta
.bandwidth
) {
449 sta
->sta
.bandwidth
= new_sta_bw
;
450 rate_control_rate_update(local
, sband
, sta
,
451 IEEE80211_RC_BW_CHANGED
);
454 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
457 "AP %pM changed bandwidth to incompatible one - disconnect\n",
462 if (new_sta_bw
> sta
->sta
.bandwidth
) {
463 sta
->sta
.bandwidth
= new_sta_bw
;
464 rate_control_rate_update(local
, sband
, sta
,
465 IEEE80211_RC_BW_CHANGED
);
468 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
470 /* if bss configuration changed store the new one */
471 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
472 *changed
|= BSS_CHANGED_HT
;
473 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
479 /* frame sending functions */
481 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
482 struct ieee80211_supported_band
*sband
,
488 for (i
= 0; i
< supp_rates_len
; i
++) {
489 int rate
= (supp_rates
[i
] & 0x7F) * 5;
491 for (j
= 0; j
< sband
->n_bitrates
; j
++)
492 if (sband
->bitrates
[j
].bitrate
== rate
) {
502 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
503 struct sk_buff
*skb
, u8 ap_ht_param
,
504 struct ieee80211_supported_band
*sband
,
505 struct ieee80211_channel
*channel
,
506 enum ieee80211_smps_mode smps
)
509 u32 flags
= channel
->flags
;
511 struct ieee80211_sta_ht_cap ht_cap
;
513 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
515 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
516 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
518 /* determine capability flags */
521 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
522 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
523 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
524 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
525 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
528 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
529 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
530 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
531 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
537 * If 40 MHz was disabled associate as though we weren't
538 * capable of 40 MHz -- some broken APs will never fall
539 * back to trying to transmit in 20 MHz.
541 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
542 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
543 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
546 /* set SM PS mode properly */
547 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
549 case IEEE80211_SMPS_AUTOMATIC
:
550 case IEEE80211_SMPS_NUM_MODES
:
552 case IEEE80211_SMPS_OFF
:
553 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
554 IEEE80211_HT_CAP_SM_PS_SHIFT
;
556 case IEEE80211_SMPS_STATIC
:
557 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
558 IEEE80211_HT_CAP_SM_PS_SHIFT
;
560 case IEEE80211_SMPS_DYNAMIC
:
561 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
562 IEEE80211_HT_CAP_SM_PS_SHIFT
;
566 /* reserve and fill IE */
567 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
568 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
571 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
573 struct ieee80211_supported_band
*sband
,
574 struct ieee80211_vht_cap
*ap_vht_cap
)
578 struct ieee80211_sta_vht_cap vht_cap
;
580 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
582 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
583 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
585 /* determine capability flags */
588 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
589 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
;
590 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
593 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
594 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
595 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
599 * Some APs apparently get confused if our capabilities are better
600 * than theirs, so restrict what we advertise in the assoc request.
602 if (!(ap_vht_cap
->vht_cap_info
&
603 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
604 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
606 /* reserve and fill IE */
607 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
608 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
611 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
613 struct ieee80211_local
*local
= sdata
->local
;
614 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
615 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
617 struct ieee80211_mgmt
*mgmt
;
619 size_t offset
= 0, noffset
;
620 int i
, count
, rates_len
, supp_rates_len
;
622 struct ieee80211_supported_band
*sband
;
623 struct ieee80211_chanctx_conf
*chanctx_conf
;
624 struct ieee80211_channel
*chan
;
627 sdata_assert_lock(sdata
);
630 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
631 if (WARN_ON(!chanctx_conf
)) {
635 chan
= chanctx_conf
->def
.chan
;
637 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
639 if (assoc_data
->supp_rates_len
) {
641 * Get all rates supported by the device and the AP as
642 * some APs don't like getting a superset of their rates
643 * in the association request (e.g. D-Link DAP 1353 in
646 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
647 assoc_data
->supp_rates_len
,
651 * In case AP not provide any supported rates information
652 * before association, we send information element(s) with
653 * all rates that we support.
656 rates_len
= sband
->n_bitrates
;
659 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
660 sizeof(*mgmt
) + /* bit too much but doesn't matter */
661 2 + assoc_data
->ssid_len
+ /* SSID */
662 4 + rates_len
+ /* (extended) rates */
663 4 + /* power capability */
664 2 + 2 * sband
->n_channels
+ /* supported channels */
665 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
666 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
667 assoc_data
->ie_len
+ /* extra IEs */
673 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
675 capab
= WLAN_CAPABILITY_ESS
;
677 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
678 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
679 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
680 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
681 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
684 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
685 capab
|= WLAN_CAPABILITY_PRIVACY
;
687 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
688 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
689 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
691 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
693 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
694 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
695 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
697 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
699 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
700 IEEE80211_STYPE_REASSOC_REQ
);
701 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
702 mgmt
->u
.reassoc_req
.listen_interval
=
703 cpu_to_le16(local
->hw
.conf
.listen_interval
);
704 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
708 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
709 IEEE80211_STYPE_ASSOC_REQ
);
710 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
711 mgmt
->u
.assoc_req
.listen_interval
=
712 cpu_to_le16(local
->hw
.conf
.listen_interval
);
716 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
717 *pos
++ = WLAN_EID_SSID
;
718 *pos
++ = assoc_data
->ssid_len
;
719 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
721 /* add all rates which were marked to be used above */
722 supp_rates_len
= rates_len
;
723 if (supp_rates_len
> 8)
726 pos
= skb_put(skb
, supp_rates_len
+ 2);
727 *pos
++ = WLAN_EID_SUPP_RATES
;
728 *pos
++ = supp_rates_len
;
731 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
732 if (BIT(i
) & rates
) {
733 int rate
= sband
->bitrates
[i
].bitrate
;
734 *pos
++ = (u8
) (rate
/ 5);
740 if (rates_len
> count
) {
741 pos
= skb_put(skb
, rates_len
- count
+ 2);
742 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
743 *pos
++ = rates_len
- count
;
745 for (i
++; i
< sband
->n_bitrates
; i
++) {
746 if (BIT(i
) & rates
) {
747 int rate
= sband
->bitrates
[i
].bitrate
;
748 *pos
++ = (u8
) (rate
/ 5);
753 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
754 /* 1. power capabilities */
755 pos
= skb_put(skb
, 4);
756 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
758 *pos
++ = 0; /* min tx power */
759 *pos
++ = chan
->max_power
; /* max tx power */
761 /* 2. supported channels */
762 /* TODO: get this in reg domain format */
763 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
764 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
765 *pos
++ = 2 * sband
->n_channels
;
766 for (i
= 0; i
< sband
->n_channels
; i
++) {
767 *pos
++ = ieee80211_frequency_to_channel(
768 sband
->channels
[i
].center_freq
);
769 *pos
++ = 1; /* one channel in the subband*/
773 /* if present, add any custom IEs that go before HT */
774 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
775 static const u8 before_ht
[] = {
778 WLAN_EID_EXT_SUPP_RATES
,
779 WLAN_EID_PWR_CAPABILITY
,
780 WLAN_EID_SUPPORTED_CHANNELS
,
783 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
784 WLAN_EID_MOBILITY_DOMAIN
,
785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
787 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
788 before_ht
, ARRAY_SIZE(before_ht
),
790 pos
= skb_put(skb
, noffset
- offset
);
791 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
795 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
796 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
797 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
799 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
800 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
801 sband
, chan
, sdata
->smps_mode
);
803 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
804 ieee80211_add_vht_ie(sdata
, skb
, sband
,
805 &assoc_data
->ap_vht_cap
);
807 /* if present, add any custom non-vendor IEs that go after HT */
808 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
809 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
812 pos
= skb_put(skb
, noffset
- offset
);
813 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
817 if (assoc_data
->wmm
) {
818 if (assoc_data
->uapsd
) {
819 qos_info
= ifmgd
->uapsd_queues
;
820 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
821 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
826 pos
= skb_put(skb
, 9);
827 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
828 *pos
++ = 7; /* len */
829 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
832 *pos
++ = 2; /* WME */
833 *pos
++ = 0; /* WME info */
834 *pos
++ = 1; /* WME ver */
838 /* add any remaining custom (i.e. vendor specific here) IEs */
839 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
840 noffset
= assoc_data
->ie_len
;
841 pos
= skb_put(skb
, noffset
- offset
);
842 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
845 drv_mgd_prepare_tx(local
, sdata
);
847 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
848 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
849 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
850 IEEE80211_TX_INTFL_MLME_CONN_TX
;
851 ieee80211_tx_skb(sdata
, skb
);
854 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
855 struct ieee80211_sub_if_data
*sdata
)
857 struct ieee80211_pspoll
*pspoll
;
860 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
864 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
865 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
867 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
868 ieee80211_tx_skb(sdata
, skb
);
871 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
872 struct ieee80211_sub_if_data
*sdata
,
876 struct ieee80211_hdr_3addr
*nullfunc
;
877 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
879 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
883 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
885 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
887 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
888 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
890 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
891 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
893 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
894 IEEE80211_STA_CONNECTION_POLL
))
895 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
897 ieee80211_tx_skb(sdata
, skb
);
900 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
901 struct ieee80211_sub_if_data
*sdata
)
904 struct ieee80211_hdr
*nullfunc
;
907 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
910 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
914 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
916 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
917 memset(nullfunc
, 0, 30);
918 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
919 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
920 nullfunc
->frame_control
= fc
;
921 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
922 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
923 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
924 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
926 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
927 ieee80211_tx_skb(sdata
, skb
);
930 /* spectrum management related things */
931 static void ieee80211_chswitch_work(struct work_struct
*work
)
933 struct ieee80211_sub_if_data
*sdata
=
934 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
935 struct ieee80211_local
*local
= sdata
->local
;
936 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
938 if (!ieee80211_sdata_running(sdata
))
942 if (!ifmgd
->associated
)
945 local
->_oper_chandef
= local
->csa_chandef
;
947 if (!local
->ops
->channel_switch
) {
948 /* call "hw_config" only if doing sw channel switch */
949 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
951 /* update the device channel directly */
952 local
->hw
.conf
.chandef
= local
->_oper_chandef
;
955 /* XXX: shouldn't really modify cfg80211-owned data! */
956 ifmgd
->associated
->channel
= local
->_oper_chandef
.chan
;
958 /* XXX: wait for a beacon first? */
959 ieee80211_wake_queues_by_reason(&local
->hw
,
960 IEEE80211_MAX_QUEUE_MAP
,
961 IEEE80211_QUEUE_STOP_REASON_CSA
);
963 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
967 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
969 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
970 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
972 trace_api_chswitch_done(sdata
, success
);
975 "driver channel switch failed, disconnecting\n");
976 ieee80211_queue_work(&sdata
->local
->hw
,
977 &ifmgd
->csa_connection_drop_work
);
979 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
982 EXPORT_SYMBOL(ieee80211_chswitch_done
);
984 static void ieee80211_chswitch_timer(unsigned long data
)
986 struct ieee80211_sub_if_data
*sdata
=
987 (struct ieee80211_sub_if_data
*) data
;
989 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
993 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
994 u64 timestamp
, struct ieee802_11_elems
*elems
,
997 struct ieee80211_local
*local
= sdata
->local
;
998 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
999 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1000 struct ieee80211_bss
*bss
;
1001 struct ieee80211_chanctx
*chanctx
;
1002 enum ieee80211_band new_band
;
1007 struct ieee80211_channel
*new_chan
;
1008 struct cfg80211_chan_def new_chandef
= {};
1009 struct cfg80211_chan_def new_vht_chandef
= {};
1010 const struct ieee80211_sec_chan_offs_ie
*sec_chan_offs
;
1011 const struct ieee80211_wide_bw_chansw_ie
*wide_bw_chansw_ie
;
1012 const struct ieee80211_ht_operation
*ht_oper
;
1013 int secondary_channel_offset
= -1;
1015 sdata_assert_lock(sdata
);
1020 if (local
->scanning
)
1023 /* disregard subsequent announcements if we are already processing */
1024 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
1027 sec_chan_offs
= elems
->sec_chan_offs
;
1028 wide_bw_chansw_ie
= elems
->wide_bw_chansw_ie
;
1029 ht_oper
= elems
->ht_operation
;
1031 if (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
1032 IEEE80211_STA_DISABLE_40MHZ
)) {
1033 sec_chan_offs
= NULL
;
1034 wide_bw_chansw_ie
= NULL
;
1035 /* only used for bandwidth here */
1039 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
1040 wide_bw_chansw_ie
= NULL
;
1042 if (elems
->ext_chansw_ie
) {
1043 if (!ieee80211_operating_class_to_band(
1044 elems
->ext_chansw_ie
->new_operating_class
,
1047 "cannot understand ECSA IE operating class %d, disconnecting\n",
1048 elems
->ext_chansw_ie
->new_operating_class
);
1049 ieee80211_queue_work(&local
->hw
,
1050 &ifmgd
->csa_connection_drop_work
);
1052 new_chan_no
= elems
->ext_chansw_ie
->new_ch_num
;
1053 count
= elems
->ext_chansw_ie
->count
;
1054 mode
= elems
->ext_chansw_ie
->mode
;
1055 } else if (elems
->ch_switch_ie
) {
1056 new_band
= cbss
->channel
->band
;
1057 new_chan_no
= elems
->ch_switch_ie
->new_ch_num
;
1058 count
= elems
->ch_switch_ie
->count
;
1059 mode
= elems
->ch_switch_ie
->mode
;
1061 /* nothing here we understand */
1065 bss
= (void *)cbss
->priv
;
1067 new_freq
= ieee80211_channel_to_frequency(new_chan_no
, new_band
);
1068 new_chan
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
1069 if (!new_chan
|| new_chan
->flags
& IEEE80211_CHAN_DISABLED
) {
1071 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1072 ifmgd
->associated
->bssid
, new_freq
);
1073 ieee80211_queue_work(&local
->hw
,
1074 &ifmgd
->csa_connection_drop_work
);
1078 if (!beacon
&& sec_chan_offs
) {
1079 secondary_channel_offset
= sec_chan_offs
->sec_chan_offs
;
1080 } else if (beacon
&& ht_oper
) {
1081 secondary_channel_offset
=
1082 ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
;
1083 } else if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
1085 * If it's not a beacon, HT is enabled and the IE not present,
1086 * it's 20 MHz, 802.11-2012 8.5.2.6:
1087 * This element [the Secondary Channel Offset Element] is
1088 * present when switching to a 40 MHz channel. It may be
1089 * present when switching to a 20 MHz channel (in which
1090 * case the secondary channel offset is set to SCN).
1092 secondary_channel_offset
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1095 switch (secondary_channel_offset
) {
1097 /* secondary_channel_offset was present but is invalid */
1098 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1099 cfg80211_chandef_create(&new_chandef
, new_chan
,
1102 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1103 cfg80211_chandef_create(&new_chandef
, new_chan
,
1104 NL80211_CHAN_HT40PLUS
);
1106 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1107 cfg80211_chandef_create(&new_chandef
, new_chan
,
1108 NL80211_CHAN_HT40MINUS
);
1111 cfg80211_chandef_create(&new_chandef
, new_chan
,
1112 NL80211_CHAN_NO_HT
);
1116 if (wide_bw_chansw_ie
) {
1117 new_vht_chandef
.chan
= new_chan
;
1118 new_vht_chandef
.center_freq1
=
1119 ieee80211_channel_to_frequency(
1120 wide_bw_chansw_ie
->new_center_freq_seg0
,
1123 switch (wide_bw_chansw_ie
->new_channel_width
) {
1125 /* hmmm, ignore VHT and use HT if present */
1126 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
1127 new_vht_chandef
.chan
= NULL
;
1129 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
1130 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
1132 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
1133 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
1135 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
1136 /* field is otherwise reserved */
1137 new_vht_chandef
.center_freq2
=
1138 ieee80211_channel_to_frequency(
1139 wide_bw_chansw_ie
->new_center_freq_seg1
,
1141 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
1144 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
1145 new_vht_chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
1146 chandef_downgrade(&new_vht_chandef
);
1147 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
1148 new_vht_chandef
.width
== NL80211_CHAN_WIDTH_160
)
1149 chandef_downgrade(&new_vht_chandef
);
1150 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
1151 new_vht_chandef
.width
> NL80211_CHAN_WIDTH_20
)
1152 chandef_downgrade(&new_vht_chandef
);
1155 /* if VHT data is there validate & use it */
1156 if (new_vht_chandef
.chan
) {
1157 if (!cfg80211_chandef_compatible(&new_vht_chandef
,
1160 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1161 ifmgd
->associated
->bssid
);
1162 ieee80211_queue_work(&local
->hw
,
1163 &ifmgd
->csa_connection_drop_work
);
1166 new_chandef
= new_vht_chandef
;
1169 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &new_chandef
,
1170 IEEE80211_CHAN_DISABLED
)) {
1172 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1173 ifmgd
->associated
->bssid
, new_freq
,
1174 new_chandef
.width
, new_chandef
.center_freq1
,
1175 new_chandef
.center_freq2
);
1176 ieee80211_queue_work(&local
->hw
,
1177 &ifmgd
->csa_connection_drop_work
);
1181 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
1183 if (local
->use_chanctx
) {
1185 "not handling channel switch with channel contexts\n");
1186 ieee80211_queue_work(&local
->hw
,
1187 &ifmgd
->csa_connection_drop_work
);
1191 mutex_lock(&local
->chanctx_mtx
);
1192 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
1193 mutex_unlock(&local
->chanctx_mtx
);
1196 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
1197 struct ieee80211_chanctx
, conf
);
1198 if (chanctx
->refcount
> 1) {
1200 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1201 ieee80211_queue_work(&local
->hw
,
1202 &ifmgd
->csa_connection_drop_work
);
1203 mutex_unlock(&local
->chanctx_mtx
);
1206 mutex_unlock(&local
->chanctx_mtx
);
1208 local
->csa_chandef
= new_chandef
;
1211 ieee80211_stop_queues_by_reason(&local
->hw
,
1212 IEEE80211_MAX_QUEUE_MAP
,
1213 IEEE80211_QUEUE_STOP_REASON_CSA
);
1215 if (local
->ops
->channel_switch
) {
1216 /* use driver's channel switch callback */
1217 struct ieee80211_channel_switch ch_switch
= {
1218 .timestamp
= timestamp
,
1220 .chandef
= new_chandef
,
1224 drv_channel_switch(local
, &ch_switch
);
1228 /* channel switch handled in software */
1230 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1232 mod_timer(&ifmgd
->chswitch_timer
,
1233 TU_TO_EXP_TIME(count
* cbss
->beacon_interval
));
1236 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1237 struct ieee80211_channel
*channel
,
1238 const u8
*country_ie
, u8 country_ie_len
,
1239 const u8
*pwr_constr_elem
)
1241 struct ieee80211_country_ie_triplet
*triplet
;
1242 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1243 int i
, chan_pwr
, chan_increment
, new_ap_level
;
1244 bool have_chan_pwr
= false;
1247 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1250 triplet
= (void *)(country_ie
+ 3);
1251 country_ie_len
-= 3;
1253 switch (channel
->band
) {
1257 case IEEE80211_BAND_2GHZ
:
1258 case IEEE80211_BAND_60GHZ
:
1261 case IEEE80211_BAND_5GHZ
:
1267 while (country_ie_len
>= 3) {
1268 u8 first_channel
= triplet
->chans
.first_channel
;
1270 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1273 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1274 if (first_channel
+ i
* chan_increment
== chan
) {
1275 have_chan_pwr
= true;
1276 chan_pwr
= triplet
->chans
.max_power
;
1285 country_ie_len
-= 3;
1291 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
1293 if (sdata
->ap_power_level
== new_ap_level
)
1297 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1298 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
1299 sdata
->u
.mgd
.bssid
);
1300 sdata
->ap_power_level
= new_ap_level
;
1301 if (__ieee80211_recalc_txpower(sdata
))
1302 return BSS_CHANGED_TXPOWER
;
1307 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1308 struct ieee80211_sub_if_data
*sdata
)
1310 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1313 * If we are scanning right now then the parameters will
1314 * take effect when scan finishes.
1316 if (local
->scanning
)
1319 if (conf
->dynamic_ps_timeout
> 0 &&
1320 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1321 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1322 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1324 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1325 ieee80211_send_nullfunc(local
, sdata
, 1);
1327 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1328 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1331 conf
->flags
|= IEEE80211_CONF_PS
;
1332 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1336 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1338 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1340 if (local
->ps_sdata
) {
1341 ieee80211_enable_ps(local
, local
->ps_sdata
);
1342 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1343 conf
->flags
&= ~IEEE80211_CONF_PS
;
1344 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1345 del_timer_sync(&local
->dynamic_ps_timer
);
1346 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1350 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1352 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1353 struct sta_info
*sta
= NULL
;
1354 bool authorized
= false;
1356 if (!mgd
->powersave
)
1362 if (!mgd
->associated
)
1365 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1366 IEEE80211_STA_CONNECTION_POLL
))
1369 if (!mgd
->have_beacon
)
1373 sta
= sta_info_get(sdata
, mgd
->bssid
);
1375 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1381 /* need to hold RTNL or interface lock */
1382 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1384 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1388 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1389 local
->ps_sdata
= NULL
;
1393 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1394 if (!ieee80211_sdata_running(sdata
))
1396 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1397 /* If an AP vif is found, then disable PS
1398 * by setting the count to zero thereby setting
1404 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1410 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1414 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1416 beaconint_us
= ieee80211_tu_to_usec(
1417 found
->vif
.bss_conf
.beacon_int
);
1419 timeout
= local
->dynamic_ps_forced_timeout
;
1422 * Go to full PSM if the user configures a very low
1423 * latency requirement.
1424 * The 2000 second value is there for compatibility
1425 * until the PM_QOS_NETWORK_LATENCY is configured
1428 if (latency
> (1900 * USEC_PER_MSEC
) &&
1429 latency
!= (2000 * USEC_PER_SEC
))
1434 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1436 if (beaconint_us
> latency
) {
1437 local
->ps_sdata
= NULL
;
1440 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1442 /* If the TIM IE is invalid, pretend the value is 1 */
1445 else if (dtimper
> 1)
1446 maxslp
= min_t(int, dtimper
,
1447 latency
/ beaconint_us
);
1449 local
->hw
.conf
.max_sleep_period
= maxslp
;
1450 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1451 local
->ps_sdata
= found
;
1454 local
->ps_sdata
= NULL
;
1457 ieee80211_change_ps(local
);
1460 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1462 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1464 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1465 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1466 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1470 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1472 struct ieee80211_local
*local
=
1473 container_of(work
, struct ieee80211_local
,
1474 dynamic_ps_disable_work
);
1476 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1477 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1478 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1481 ieee80211_wake_queues_by_reason(&local
->hw
,
1482 IEEE80211_MAX_QUEUE_MAP
,
1483 IEEE80211_QUEUE_STOP_REASON_PS
);
1486 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1488 struct ieee80211_local
*local
=
1489 container_of(work
, struct ieee80211_local
,
1490 dynamic_ps_enable_work
);
1491 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1492 struct ieee80211_if_managed
*ifmgd
;
1493 unsigned long flags
;
1496 /* can only happen when PS was just disabled anyway */
1500 ifmgd
= &sdata
->u
.mgd
;
1502 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1505 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1506 /* don't enter PS if TX frames are pending */
1507 if (drv_tx_frames_pending(local
)) {
1508 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1510 local
->hw
.conf
.dynamic_ps_timeout
));
1515 * transmission can be stopped by others which leads to
1516 * dynamic_ps_timer expiry. Postpone the ps timer if it
1517 * is not the actual idle state.
1519 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1520 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1521 if (local
->queue_stop_reasons
[q
]) {
1522 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1524 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1526 local
->hw
.conf
.dynamic_ps_timeout
));
1530 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1533 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1534 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1535 if (drv_tx_frames_pending(local
)) {
1536 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1538 local
->hw
.conf
.dynamic_ps_timeout
));
1540 ieee80211_send_nullfunc(local
, sdata
, 1);
1541 /* Flush to get the tx status of nullfunc frame */
1542 ieee80211_flush_queues(local
, sdata
);
1546 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1547 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1548 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1549 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1550 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1551 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1555 void ieee80211_dynamic_ps_timer(unsigned long data
)
1557 struct ieee80211_local
*local
= (void *) data
;
1559 if (local
->quiescing
|| local
->suspended
)
1562 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1565 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1567 struct delayed_work
*delayed_work
=
1568 container_of(work
, struct delayed_work
, work
);
1569 struct ieee80211_sub_if_data
*sdata
=
1570 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1571 dfs_cac_timer_work
);
1573 ieee80211_vif_release_channel(sdata
);
1575 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_FINISHED
, GFP_KERNEL
);
1579 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1580 struct ieee80211_sub_if_data
*sdata
,
1581 const u8
*wmm_param
, size_t wmm_param_len
)
1583 struct ieee80211_tx_queue_params params
;
1584 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1588 u8 uapsd_queues
= 0;
1590 if (!local
->ops
->conf_tx
)
1593 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1599 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1602 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1603 uapsd_queues
= ifmgd
->uapsd_queues
;
1605 count
= wmm_param
[6] & 0x0f;
1606 if (count
== ifmgd
->wmm_last_param_set
)
1608 ifmgd
->wmm_last_param_set
= count
;
1610 pos
= wmm_param
+ 8;
1611 left
= wmm_param_len
- 8;
1613 memset(¶ms
, 0, sizeof(params
));
1616 for (; left
>= 4; left
-= 4, pos
+= 4) {
1617 int aci
= (pos
[0] >> 5) & 0x03;
1618 int acm
= (pos
[0] >> 4) & 0x01;
1626 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1627 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1633 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1634 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1640 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1641 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1648 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1649 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1654 params
.aifs
= pos
[0] & 0x0f;
1655 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1656 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1657 params
.txop
= get_unaligned_le16(pos
+ 2);
1659 params
.uapsd
= uapsd
;
1662 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1664 params
.aifs
, params
.cw_min
, params
.cw_max
,
1665 params
.txop
, params
.uapsd
);
1666 sdata
->tx_conf
[queue
] = params
;
1667 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1669 "failed to set TX queue parameters for queue %d\n",
1673 /* enable WMM or activate new settings */
1674 sdata
->vif
.bss_conf
.qos
= true;
1678 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1680 lockdep_assert_held(&sdata
->local
->mtx
);
1682 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1683 IEEE80211_STA_BEACON_POLL
);
1684 ieee80211_run_deferred_scan(sdata
->local
);
1687 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1689 mutex_lock(&sdata
->local
->mtx
);
1690 __ieee80211_stop_poll(sdata
);
1691 mutex_unlock(&sdata
->local
->mtx
);
1694 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1695 u16 capab
, bool erp_valid
, u8 erp
)
1697 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1699 bool use_protection
;
1700 bool use_short_preamble
;
1701 bool use_short_slot
;
1704 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1705 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1707 use_protection
= false;
1708 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1711 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1712 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1713 use_short_slot
= true;
1715 if (use_protection
!= bss_conf
->use_cts_prot
) {
1716 bss_conf
->use_cts_prot
= use_protection
;
1717 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1720 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1721 bss_conf
->use_short_preamble
= use_short_preamble
;
1722 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1725 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1726 bss_conf
->use_short_slot
= use_short_slot
;
1727 changed
|= BSS_CHANGED_ERP_SLOT
;
1733 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1734 struct cfg80211_bss
*cbss
,
1735 u32 bss_info_changed
)
1737 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1738 struct ieee80211_local
*local
= sdata
->local
;
1739 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1741 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1742 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1743 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1745 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1746 beacon_loss_count
* bss_conf
->beacon_int
));
1748 sdata
->u
.mgd
.associated
= cbss
;
1749 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1751 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1753 if (sdata
->vif
.p2p
) {
1754 const struct cfg80211_bss_ies
*ies
;
1757 ies
= rcu_dereference(cbss
->ies
);
1761 ret
= cfg80211_get_p2p_attr(
1762 ies
->data
, ies
->len
,
1763 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1764 (u8
*) &bss_conf
->p2p_noa_attr
,
1765 sizeof(bss_conf
->p2p_noa_attr
));
1767 sdata
->u
.mgd
.p2p_noa_index
=
1768 bss_conf
->p2p_noa_attr
.index
;
1769 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1775 /* just to be sure */
1776 ieee80211_stop_poll(sdata
);
1778 ieee80211_led_assoc(local
, 1);
1780 if (sdata
->u
.mgd
.have_beacon
) {
1782 * If the AP is buggy we may get here with no DTIM period
1783 * known, so assume it's 1 which is the only safe assumption
1784 * in that case, although if the TIM IE is broken powersave
1785 * probably just won't work at all.
1787 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1788 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1789 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1791 bss_conf
->beacon_rate
= NULL
;
1792 bss_conf
->dtim_period
= 0;
1795 bss_conf
->assoc
= 1;
1797 /* Tell the driver to monitor connection quality (if supported) */
1798 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1799 bss_conf
->cqm_rssi_thold
)
1800 bss_info_changed
|= BSS_CHANGED_CQM
;
1802 /* Enable ARP filtering */
1803 if (bss_conf
->arp_addr_cnt
)
1804 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1806 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1808 mutex_lock(&local
->iflist_mtx
);
1809 ieee80211_recalc_ps(local
, -1);
1810 mutex_unlock(&local
->iflist_mtx
);
1812 ieee80211_recalc_smps(sdata
);
1813 ieee80211_recalc_ps_vif(sdata
);
1815 netif_carrier_on(sdata
->dev
);
1818 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1819 u16 stype
, u16 reason
, bool tx
,
1822 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1823 struct ieee80211_local
*local
= sdata
->local
;
1826 sdata_assert_lock(sdata
);
1828 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1831 if (WARN_ON(!ifmgd
->associated
))
1834 ieee80211_stop_poll(sdata
);
1836 ifmgd
->associated
= NULL
;
1837 netif_carrier_off(sdata
->dev
);
1840 * if we want to get out of ps before disassoc (why?) we have
1841 * to do it before sending disassoc, as otherwise the null-packet
1844 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1845 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1846 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1848 local
->ps_sdata
= NULL
;
1850 /* disable per-vif ps */
1851 ieee80211_recalc_ps_vif(sdata
);
1853 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1855 ieee80211_flush_queues(local
, sdata
);
1857 /* deauthenticate/disassociate now */
1858 if (tx
|| frame_buf
)
1859 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1860 reason
, tx
, frame_buf
);
1862 /* flush out frame */
1864 ieee80211_flush_queues(local
, sdata
);
1866 /* clear bssid only after building the needed mgmt frames */
1867 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1869 /* remove AP and TDLS peers */
1870 sta_info_flush_defer(sdata
);
1872 /* finally reset all BSS / config parameters */
1873 changed
|= ieee80211_reset_erp_info(sdata
);
1875 ieee80211_led_assoc(local
, 0);
1876 changed
|= BSS_CHANGED_ASSOC
;
1877 sdata
->vif
.bss_conf
.assoc
= false;
1879 ifmgd
->p2p_noa_index
= -1;
1880 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
1881 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
1883 /* on the next assoc, re-program HT/VHT parameters */
1884 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1885 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1886 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
1887 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
1889 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1891 del_timer_sync(&local
->dynamic_ps_timer
);
1892 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1894 /* Disable ARP filtering */
1895 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1896 changed
|= BSS_CHANGED_ARP_FILTER
;
1898 sdata
->vif
.bss_conf
.qos
= false;
1899 changed
|= BSS_CHANGED_QOS
;
1901 /* The BSSID (not really interesting) and HT changed */
1902 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1903 ieee80211_bss_info_change_notify(sdata
, changed
);
1905 /* disassociated - set to defaults now */
1906 ieee80211_set_wmm_default(sdata
, false);
1908 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1909 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1910 del_timer_sync(&sdata
->u
.mgd
.timer
);
1911 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1913 sdata
->vif
.bss_conf
.dtim_period
= 0;
1914 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
1916 ifmgd
->have_beacon
= false;
1919 ieee80211_vif_release_channel(sdata
);
1922 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1923 struct ieee80211_hdr
*hdr
)
1926 * We can postpone the mgd.timer whenever receiving unicast frames
1927 * from AP because we know that the connection is working both ways
1928 * at that time. But multicast frames (and hence also beacons) must
1929 * be ignored here, because we need to trigger the timer during
1930 * data idle periods for sending the periodic probe request to the
1931 * AP we're connected to.
1933 if (is_multicast_ether_addr(hdr
->addr1
))
1936 ieee80211_sta_reset_conn_monitor(sdata
);
1939 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1941 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1942 struct ieee80211_local
*local
= sdata
->local
;
1944 mutex_lock(&local
->mtx
);
1945 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1946 IEEE80211_STA_CONNECTION_POLL
))) {
1947 mutex_unlock(&local
->mtx
);
1951 __ieee80211_stop_poll(sdata
);
1953 mutex_lock(&local
->iflist_mtx
);
1954 ieee80211_recalc_ps(local
, -1);
1955 mutex_unlock(&local
->iflist_mtx
);
1957 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1961 * We've received a probe response, but are not sure whether
1962 * we have or will be receiving any beacons or data, so let's
1963 * schedule the timers again, just in case.
1965 ieee80211_sta_reset_beacon_monitor(sdata
);
1967 mod_timer(&ifmgd
->conn_mon_timer
,
1968 round_jiffies_up(jiffies
+
1969 IEEE80211_CONNECTION_IDLE_TIME
));
1971 mutex_unlock(&local
->mtx
);
1974 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1975 struct ieee80211_hdr
*hdr
, bool ack
)
1977 if (!ieee80211_is_data(hdr
->frame_control
))
1980 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1981 sdata
->u
.mgd
.probe_send_count
> 0) {
1983 ieee80211_sta_reset_conn_monitor(sdata
);
1985 sdata
->u
.mgd
.nullfunc_failed
= true;
1986 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1991 ieee80211_sta_reset_conn_monitor(sdata
);
1994 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1996 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1998 u8
*dst
= ifmgd
->associated
->bssid
;
1999 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2002 * Try sending broadcast probe requests for the last three
2003 * probe requests after the first ones failed since some
2004 * buggy APs only support broadcast probe requests.
2006 if (ifmgd
->probe_send_count
>= unicast_limit
)
2010 * When the hardware reports an accurate Tx ACK status, it's
2011 * better to send a nullfunc frame instead of a probe request,
2012 * as it will kick us off the AP quickly if we aren't associated
2013 * anymore. The timeout will be reset if the frame is ACKed by
2016 ifmgd
->probe_send_count
++;
2018 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2019 ifmgd
->nullfunc_failed
= false;
2020 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
2025 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2026 if (WARN_ON_ONCE(ssid
== NULL
))
2031 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
2032 0, (u32
) -1, true, 0,
2033 ifmgd
->associated
->channel
, false);
2037 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2038 run_again(sdata
, ifmgd
->probe_timeout
);
2039 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2040 ieee80211_flush_queues(sdata
->local
, sdata
);
2043 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2046 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2047 bool already
= false;
2049 if (!ieee80211_sdata_running(sdata
))
2054 if (!ifmgd
->associated
)
2057 mutex_lock(&sdata
->local
->mtx
);
2059 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2060 mutex_unlock(&sdata
->local
->mtx
);
2065 mlme_dbg_ratelimited(sdata
,
2066 "detected beacon loss from AP (missed %d beacons) - probing\n",
2069 ieee80211_cqm_rssi_notify(&sdata
->vif
,
2070 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
,
2075 * The driver/our work has already reported this event or the
2076 * connection monitoring has kicked in and we have already sent
2077 * a probe request. Or maybe the AP died and the driver keeps
2078 * reporting until we disassociate...
2080 * In either case we have to ignore the current call to this
2081 * function (except for setting the correct probe reason bit)
2082 * because otherwise we would reset the timer every time and
2083 * never check whether we received a probe response!
2085 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2086 IEEE80211_STA_CONNECTION_POLL
))
2090 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
2092 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2094 mutex_unlock(&sdata
->local
->mtx
);
2099 mutex_lock(&sdata
->local
->iflist_mtx
);
2100 ieee80211_recalc_ps(sdata
->local
, -1);
2101 mutex_unlock(&sdata
->local
->iflist_mtx
);
2103 ifmgd
->probe_send_count
= 0;
2104 ieee80211_mgd_probe_ap_send(sdata
);
2106 sdata_unlock(sdata
);
2109 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2110 struct ieee80211_vif
*vif
)
2112 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2113 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2114 struct cfg80211_bss
*cbss
;
2115 struct sk_buff
*skb
;
2119 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2122 sdata_assert_lock(sdata
);
2124 if (ifmgd
->associated
)
2125 cbss
= ifmgd
->associated
;
2126 else if (ifmgd
->auth_data
)
2127 cbss
= ifmgd
->auth_data
->bss
;
2128 else if (ifmgd
->assoc_data
)
2129 cbss
= ifmgd
->assoc_data
->bss
;
2134 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2135 if (WARN_ON_ONCE(ssid
== NULL
))
2140 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
2141 (u32
) -1, cbss
->channel
,
2148 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2150 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2152 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2153 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2156 if (!ifmgd
->associated
) {
2157 sdata_unlock(sdata
);
2161 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2162 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2164 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
2165 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
2166 IEEE80211_MAX_QUEUE_MAP
,
2167 IEEE80211_QUEUE_STOP_REASON_CSA
);
2169 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
2170 IEEE80211_DEAUTH_FRAME_LEN
);
2171 sdata_unlock(sdata
);
2174 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2176 struct ieee80211_sub_if_data
*sdata
=
2177 container_of(work
, struct ieee80211_sub_if_data
,
2178 u
.mgd
.beacon_connection_loss_work
);
2179 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2180 struct sta_info
*sta
;
2182 if (ifmgd
->associated
) {
2184 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2186 sta
->beacon_loss_count
++;
2190 if (ifmgd
->connection_loss
) {
2191 sdata_info(sdata
, "Connection to AP %pM lost\n",
2193 __ieee80211_disconnect(sdata
);
2195 ieee80211_mgd_probe_ap(sdata
, true);
2199 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2201 struct ieee80211_sub_if_data
*sdata
=
2202 container_of(work
, struct ieee80211_sub_if_data
,
2203 u
.mgd
.csa_connection_drop_work
);
2205 __ieee80211_disconnect(sdata
);
2208 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2210 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2211 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2213 trace_api_beacon_loss(sdata
);
2215 sdata
->u
.mgd
.connection_loss
= false;
2216 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2218 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2220 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2222 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2223 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2225 trace_api_connection_loss(sdata
);
2227 sdata
->u
.mgd
.connection_loss
= true;
2228 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2230 EXPORT_SYMBOL(ieee80211_connection_loss
);
2233 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2236 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2238 sdata_assert_lock(sdata
);
2241 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2243 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2244 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2245 sdata
->u
.mgd
.flags
= 0;
2246 ieee80211_vif_release_channel(sdata
);
2249 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2251 sdata
->u
.mgd
.auth_data
= NULL
;
2254 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2255 struct ieee80211_mgmt
*mgmt
, size_t len
)
2257 struct ieee80211_local
*local
= sdata
->local
;
2258 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2260 struct ieee802_11_elems elems
;
2263 pos
= mgmt
->u
.auth
.variable
;
2264 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2265 if (!elems
.challenge
)
2267 auth_data
->expected_transaction
= 4;
2268 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2269 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2270 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2271 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2272 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2273 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2274 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2275 auth_data
->key
, auth_data
->key_len
,
2276 auth_data
->key_idx
, tx_flags
);
2279 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2280 struct ieee80211_mgmt
*mgmt
, size_t len
)
2282 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2284 u16 auth_alg
, auth_transaction
, status_code
;
2285 struct sta_info
*sta
;
2287 sdata_assert_lock(sdata
);
2292 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2295 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2297 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2300 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2301 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2302 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2304 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2305 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2306 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2307 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2309 ifmgd
->auth_data
->expected_transaction
);
2313 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2314 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2315 mgmt
->sa
, status_code
);
2316 ieee80211_destroy_auth_data(sdata
, false);
2317 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2321 switch (ifmgd
->auth_data
->algorithm
) {
2322 case WLAN_AUTH_OPEN
:
2323 case WLAN_AUTH_LEAP
:
2327 case WLAN_AUTH_SHARED_KEY
:
2328 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2329 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2330 /* need another frame */
2335 WARN_ONCE(1, "invalid auth alg %d",
2336 ifmgd
->auth_data
->algorithm
);
2340 sdata_info(sdata
, "authenticated\n");
2341 ifmgd
->auth_data
->done
= true;
2342 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2343 ifmgd
->auth_data
->timeout_started
= true;
2344 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2346 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2347 ifmgd
->auth_data
->expected_transaction
!= 2) {
2349 * Report auth frame to user space for processing since another
2350 * round of Authentication frames is still needed.
2352 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2356 /* move station state to auth */
2357 mutex_lock(&sdata
->local
->sta_mtx
);
2358 sta
= sta_info_get(sdata
, bssid
);
2360 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2363 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2364 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2367 mutex_unlock(&sdata
->local
->sta_mtx
);
2369 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2372 mutex_unlock(&sdata
->local
->sta_mtx
);
2373 /* ignore frame -- wait for timeout */
2377 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2378 struct ieee80211_mgmt
*mgmt
, size_t len
)
2380 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2381 const u8
*bssid
= NULL
;
2384 sdata_assert_lock(sdata
);
2389 if (!ifmgd
->associated
||
2390 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2393 bssid
= ifmgd
->associated
->bssid
;
2395 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2397 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2398 bssid
, reason_code
);
2400 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2402 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2406 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2407 struct ieee80211_mgmt
*mgmt
, size_t len
)
2409 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2412 sdata_assert_lock(sdata
);
2417 if (!ifmgd
->associated
||
2418 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2421 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2423 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2424 mgmt
->sa
, reason_code
);
2426 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2428 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2431 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2432 u8
*supp_rates
, unsigned int supp_rates_len
,
2433 u32
*rates
, u32
*basic_rates
,
2434 bool *have_higher_than_11mbit
,
2435 int *min_rate
, int *min_rate_index
)
2439 for (i
= 0; i
< supp_rates_len
; i
++) {
2440 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2441 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2444 *have_higher_than_11mbit
= true;
2447 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2448 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2450 * Note: Even through the membership selector and the basic
2451 * rate flag share the same bit, they are not exactly
2454 if (!!(supp_rates
[i
] & 0x80) &&
2455 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2458 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2459 if (sband
->bitrates
[j
].bitrate
== rate
) {
2462 *basic_rates
|= BIT(j
);
2463 if (rate
< *min_rate
) {
2465 *min_rate_index
= j
;
2473 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2476 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2478 sdata_assert_lock(sdata
);
2481 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2483 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2484 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2485 sdata
->u
.mgd
.flags
= 0;
2486 ieee80211_vif_release_channel(sdata
);
2490 sdata
->u
.mgd
.assoc_data
= NULL
;
2493 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2494 struct cfg80211_bss
*cbss
,
2495 struct ieee80211_mgmt
*mgmt
, size_t len
)
2497 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2498 struct ieee80211_local
*local
= sdata
->local
;
2499 struct ieee80211_supported_band
*sband
;
2500 struct sta_info
*sta
;
2502 u16 capab_info
, aid
;
2503 struct ieee802_11_elems elems
;
2504 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2505 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2506 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2511 /* AssocResp and ReassocResp have identical structure */
2513 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2514 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2516 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2517 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2519 aid
&= ~(BIT(15) | BIT(14));
2521 ifmgd
->broken_ap
= false;
2523 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2524 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2527 ifmgd
->broken_ap
= true;
2530 pos
= mgmt
->u
.assoc_resp
.variable
;
2531 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2533 if (!elems
.supp_rates
) {
2534 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2541 * Some APs are erroneously not including some information in their
2542 * (re)association response frames. Try to recover by using the data
2543 * from the beacon or probe response. This seems to afflict mobile
2544 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2545 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2547 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2548 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2549 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2550 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2551 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2552 const struct cfg80211_bss_ies
*ies
;
2553 struct ieee802_11_elems bss_elems
;
2556 ies
= rcu_dereference(cbss
->ies
);
2558 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2564 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2566 if (assoc_data
->wmm
&&
2567 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2568 elems
.wmm_param
= bss_elems
.wmm_param
;
2570 "AP bug: WMM param missing from AssocResp\n");
2574 * Also check if we requested HT/VHT, otherwise the AP doesn't
2575 * have to include the IEs in the (re)association response.
2577 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2578 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2579 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2581 "AP bug: HT capability missing from AssocResp\n");
2583 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2584 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2585 elems
.ht_operation
= bss_elems
.ht_operation
;
2587 "AP bug: HT operation missing from AssocResp\n");
2589 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2590 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2591 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2593 "AP bug: VHT capa missing from AssocResp\n");
2595 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2596 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2597 elems
.vht_operation
= bss_elems
.vht_operation
;
2599 "AP bug: VHT operation missing from AssocResp\n");
2604 * We previously checked these in the beacon/probe response, so
2605 * they should be present here. This is just a safety net.
2607 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2608 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2610 "HT AP is missing WMM params or HT capability/operation\n");
2615 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2616 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2618 "VHT AP is missing VHT capability/operation\n");
2623 mutex_lock(&sdata
->local
->sta_mtx
);
2625 * station info was already allocated and inserted before
2626 * the association and should be available to us
2628 sta
= sta_info_get(sdata
, cbss
->bssid
);
2629 if (WARN_ON(!sta
)) {
2630 mutex_unlock(&sdata
->local
->sta_mtx
);
2635 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2637 /* Set up internal HT/VHT capabilities */
2638 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2639 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2640 elems
.ht_cap_elem
, sta
);
2642 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2643 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2644 elems
.vht_cap_elem
, sta
);
2647 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2648 * in their association response, so ignore that data for our own
2649 * configuration. If it changed since the last beacon, we'll get the
2650 * next beacon and update then.
2654 * If an operating mode notification IE is present, override the
2655 * NSS calculation (that would be done in rate_control_rate_init())
2656 * and use the # of streams from that element.
2658 if (elems
.opmode_notif
&&
2659 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2662 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2663 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2665 sta
->sta
.rx_nss
= nss
;
2668 rate_control_rate_init(sta
);
2670 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2671 set_sta_flag(sta
, WLAN_STA_MFP
);
2673 if (elems
.wmm_param
)
2674 set_sta_flag(sta
, WLAN_STA_WME
);
2676 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2677 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2678 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2681 "failed to move station %pM to desired state\n",
2683 WARN_ON(__sta_info_destroy(sta
));
2684 mutex_unlock(&sdata
->local
->sta_mtx
);
2689 mutex_unlock(&sdata
->local
->sta_mtx
);
2692 * Always handle WMM once after association regardless
2693 * of the first value the AP uses. Setting -1 here has
2694 * that effect because the AP values is an unsigned
2697 ifmgd
->wmm_last_param_set
= -1;
2699 if (elems
.wmm_param
)
2700 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2701 elems
.wmm_param_len
);
2703 ieee80211_set_wmm_default(sdata
, false);
2704 changed
|= BSS_CHANGED_QOS
;
2706 /* set AID and assoc capability,
2707 * ieee80211_set_associated() will tell the driver */
2708 bss_conf
->aid
= aid
;
2709 bss_conf
->assoc_capability
= capab_info
;
2710 ieee80211_set_associated(sdata
, cbss
, changed
);
2713 * If we're using 4-addr mode, let the AP know that we're
2714 * doing so, so that it can create the STA VLAN on its side
2716 if (ifmgd
->use_4addr
)
2717 ieee80211_send_4addr_nullfunc(local
, sdata
);
2720 * Start timer to probe the connection to the AP now.
2721 * Also start the timer that will detect beacon loss.
2723 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2724 ieee80211_sta_reset_beacon_monitor(sdata
);
2732 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2733 struct ieee80211_mgmt
*mgmt
,
2736 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2737 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2738 u16 capab_info
, status_code
, aid
;
2739 struct ieee802_11_elems elems
;
2742 struct cfg80211_bss
*bss
;
2744 sdata_assert_lock(sdata
);
2748 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2752 * AssocResp and ReassocResp have identical structure, so process both
2753 * of them in this function.
2759 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2760 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2761 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2762 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2765 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2766 reassoc
? "Rea" : "A", mgmt
->sa
,
2767 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2769 pos
= mgmt
->u
.assoc_resp
.variable
;
2770 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2772 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2773 elems
.timeout_int
&&
2774 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2776 tu
= le32_to_cpu(elems
.timeout_int
->value
);
2777 ms
= tu
* 1024 / 1000;
2779 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2781 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2782 assoc_data
->timeout_started
= true;
2783 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2784 run_again(sdata
, assoc_data
->timeout
);
2788 bss
= assoc_data
->bss
;
2790 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2791 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2792 mgmt
->sa
, status_code
);
2793 ieee80211_destroy_assoc_data(sdata
, false);
2795 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
2796 /* oops -- internal error -- send timeout for now */
2797 ieee80211_destroy_assoc_data(sdata
, false);
2798 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, bss
);
2799 cfg80211_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
2802 sdata_info(sdata
, "associated\n");
2805 * destroy assoc_data afterwards, as otherwise an idle
2806 * recalc after assoc_data is NULL but before associated
2807 * is set can cause the interface to go idle
2809 ieee80211_destroy_assoc_data(sdata
, true);
2812 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
);
2815 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2816 struct ieee80211_mgmt
*mgmt
, size_t len
,
2817 struct ieee80211_rx_status
*rx_status
,
2818 struct ieee802_11_elems
*elems
)
2820 struct ieee80211_local
*local
= sdata
->local
;
2822 struct ieee80211_bss
*bss
;
2823 struct ieee80211_channel
*channel
;
2825 sdata_assert_lock(sdata
);
2827 if (elems
->ds_params
)
2828 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2831 freq
= rx_status
->freq
;
2833 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2835 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2838 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2841 ieee80211_rx_bss_put(local
, bss
);
2842 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
2845 if (!sdata
->u
.mgd
.associated
||
2846 !ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
))
2849 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
2855 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2856 struct sk_buff
*skb
)
2858 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2859 struct ieee80211_if_managed
*ifmgd
;
2860 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2861 size_t baselen
, len
= skb
->len
;
2862 struct ieee802_11_elems elems
;
2864 ifmgd
= &sdata
->u
.mgd
;
2866 sdata_assert_lock(sdata
);
2868 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2869 return; /* ignore ProbeResp to foreign address */
2871 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2875 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2878 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2880 if (ifmgd
->associated
&&
2881 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2882 ieee80211_reset_ap_probe(sdata
);
2884 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2885 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2886 /* got probe response, continue with auth */
2887 sdata_info(sdata
, "direct probe responded\n");
2888 ifmgd
->auth_data
->tries
= 0;
2889 ifmgd
->auth_data
->timeout
= jiffies
;
2890 ifmgd
->auth_data
->timeout_started
= true;
2891 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2896 * This is the canonical list of information elements we care about,
2897 * the filter code also gives us all changes to the Microsoft OUI
2898 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2900 * We implement beacon filtering in software since that means we can
2901 * avoid processing the frame here and in cfg80211, and userspace
2902 * will not be able to tell whether the hardware supports it or not.
2904 * XXX: This list needs to be dynamic -- userspace needs to be able to
2905 * add items it requires. It also needs to be able to tell us to
2906 * look out for other vendor IEs.
2908 static const u64 care_about_ies
=
2909 (1ULL << WLAN_EID_COUNTRY
) |
2910 (1ULL << WLAN_EID_ERP_INFO
) |
2911 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2912 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2913 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2914 (1ULL << WLAN_EID_HT_OPERATION
);
2916 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2917 struct ieee80211_mgmt
*mgmt
, size_t len
,
2918 struct ieee80211_rx_status
*rx_status
)
2920 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2921 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2923 struct ieee802_11_elems elems
;
2924 struct ieee80211_local
*local
= sdata
->local
;
2925 struct ieee80211_chanctx_conf
*chanctx_conf
;
2926 struct ieee80211_channel
*chan
;
2927 struct sta_info
*sta
;
2933 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2935 sdata_assert_lock(sdata
);
2937 /* Process beacon from the current BSS */
2938 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2943 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2944 if (!chanctx_conf
) {
2949 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2953 chan
= chanctx_conf
->def
.chan
;
2956 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
2957 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2958 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2959 len
- baselen
, false, &elems
);
2961 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2962 if (elems
.tim
&& !elems
.parse_error
) {
2963 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
2964 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
2966 ifmgd
->have_beacon
= true;
2967 ifmgd
->assoc_data
->need_beacon
= false;
2968 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
2969 sdata
->vif
.bss_conf
.sync_tsf
=
2970 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2971 sdata
->vif
.bss_conf
.sync_device_ts
=
2972 rx_status
->device_timestamp
;
2974 sdata
->vif
.bss_conf
.sync_dtim_count
=
2975 elems
.tim
->dtim_count
;
2977 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
2979 /* continue assoc process */
2980 ifmgd
->assoc_data
->timeout
= jiffies
;
2981 ifmgd
->assoc_data
->timeout_started
= true;
2982 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
2986 if (!ifmgd
->associated
||
2987 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2989 bssid
= ifmgd
->associated
->bssid
;
2991 /* Track average RSSI from the Beacon frames of the current AP */
2992 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2993 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2994 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2995 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2996 ifmgd
->last_cqm_event_signal
= 0;
2997 ifmgd
->count_beacon_signal
= 1;
2998 ifmgd
->last_ave_beacon_signal
= 0;
3000 ifmgd
->ave_beacon_signal
=
3001 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
3002 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
3003 ifmgd
->ave_beacon_signal
) / 16;
3004 ifmgd
->count_beacon_signal
++;
3007 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3008 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3009 int sig
= ifmgd
->ave_beacon_signal
;
3010 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3013 * if signal crosses either of the boundaries, invoke callback
3014 * with appropriate parameters
3016 if (sig
> ifmgd
->rssi_max_thold
&&
3017 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3018 ifmgd
->last_ave_beacon_signal
= sig
;
3019 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
3020 } else if (sig
< ifmgd
->rssi_min_thold
&&
3021 (last_sig
>= ifmgd
->rssi_max_thold
||
3023 ifmgd
->last_ave_beacon_signal
= sig
;
3024 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
3028 if (bss_conf
->cqm_rssi_thold
&&
3029 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3030 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3031 int sig
= ifmgd
->ave_beacon_signal
/ 16;
3032 int last_event
= ifmgd
->last_cqm_event_signal
;
3033 int thold
= bss_conf
->cqm_rssi_thold
;
3034 int hyst
= bss_conf
->cqm_rssi_hyst
;
3036 (last_event
== 0 || sig
< last_event
- hyst
)) {
3037 ifmgd
->last_cqm_event_signal
= sig
;
3038 ieee80211_cqm_rssi_notify(
3040 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3042 } else if (sig
> thold
&&
3043 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3044 ifmgd
->last_cqm_event_signal
= sig
;
3045 ieee80211_cqm_rssi_notify(
3047 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3052 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
3053 mlme_dbg_ratelimited(sdata
,
3054 "cancelling AP probe due to a received beacon\n");
3055 mutex_lock(&local
->mtx
);
3056 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
3057 ieee80211_run_deferred_scan(local
);
3058 mutex_unlock(&local
->mtx
);
3060 mutex_lock(&local
->iflist_mtx
);
3061 ieee80211_recalc_ps(local
, -1);
3062 mutex_unlock(&local
->iflist_mtx
);
3066 * Push the beacon loss detection into the future since
3067 * we are processing a beacon from the AP just now.
3069 ieee80211_sta_reset_beacon_monitor(sdata
);
3071 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3072 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3073 len
- baselen
, false, &elems
,
3074 care_about_ies
, ncrc
);
3076 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
3077 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
3081 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3082 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3083 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3084 ieee80211_hw_config(local
,
3085 IEEE80211_CONF_CHANGE_PS
);
3087 ieee80211_send_nullfunc(local
, sdata
, 0);
3088 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3089 local
->pspolling
= true;
3092 * Here is assumed that the driver will be
3093 * able to send ps-poll frame and receive a
3094 * response even though power save mode is
3095 * enabled, but some drivers might require
3096 * to disable power save here. This needs
3097 * to be investigated.
3099 ieee80211_send_pspoll(local
, sdata
);
3104 if (sdata
->vif
.p2p
) {
3105 struct ieee80211_p2p_noa_attr noa
= {};
3108 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3110 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3111 (u8
*) &noa
, sizeof(noa
));
3113 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3114 /* valid noa_attr and index changed */
3115 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3116 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3117 changed
|= BSS_CHANGED_P2P_PS
;
3119 * make sure we update all information, the CRC
3120 * mechanism doesn't look at P2P attributes.
3122 ifmgd
->beacon_crc_valid
= false;
3124 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3125 /* noa_attr not found and we had valid noa_attr before */
3126 sdata
->u
.mgd
.p2p_noa_index
= -1;
3127 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3128 changed
|= BSS_CHANGED_P2P_PS
;
3129 ifmgd
->beacon_crc_valid
= false;
3133 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3135 ifmgd
->beacon_crc
= ncrc
;
3136 ifmgd
->beacon_crc_valid
= true;
3138 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3140 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3141 elems
.wmm_param_len
))
3142 changed
|= BSS_CHANGED_QOS
;
3145 * If we haven't had a beacon before, tell the driver about the
3146 * DTIM period (and beacon timing if desired) now.
3148 if (!ifmgd
->have_beacon
) {
3149 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3151 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3153 bss_conf
->dtim_period
= 1;
3155 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3156 sdata
->vif
.bss_conf
.sync_tsf
=
3157 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3158 sdata
->vif
.bss_conf
.sync_device_ts
=
3159 rx_status
->device_timestamp
;
3161 sdata
->vif
.bss_conf
.sync_dtim_count
=
3162 elems
.tim
->dtim_count
;
3164 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3167 changed
|= BSS_CHANGED_BEACON_INFO
;
3168 ifmgd
->have_beacon
= true;
3170 mutex_lock(&local
->iflist_mtx
);
3171 ieee80211_recalc_ps(local
, -1);
3172 mutex_unlock(&local
->iflist_mtx
);
3174 ieee80211_recalc_ps_vif(sdata
);
3177 if (elems
.erp_info
) {
3179 erp_value
= elems
.erp_info
[0];
3183 changed
|= ieee80211_handle_bss_capability(sdata
,
3184 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3185 erp_valid
, erp_value
);
3187 mutex_lock(&local
->sta_mtx
);
3188 sta
= sta_info_get(sdata
, bssid
);
3190 if (ieee80211_config_bw(sdata
, sta
, elems
.ht_operation
,
3191 elems
.vht_operation
, bssid
, &changed
)) {
3192 mutex_unlock(&local
->sta_mtx
);
3193 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3194 WLAN_REASON_DEAUTH_LEAVING
,
3196 cfg80211_tx_mlme_mgmt(sdata
->dev
, deauth_buf
,
3197 sizeof(deauth_buf
));
3201 if (sta
&& elems
.opmode_notif
)
3202 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3203 rx_status
->band
, true);
3204 mutex_unlock(&local
->sta_mtx
);
3206 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
3207 mgmt
->u
.probe_resp
.capab_info
&
3208 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
3209 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
3211 elems
.country_elem_len
,
3212 elems
.pwr_constr_elem
);
3214 ieee80211_bss_info_change_notify(sdata
, changed
);
3217 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3218 struct sk_buff
*skb
)
3220 struct ieee80211_rx_status
*rx_status
;
3221 struct ieee80211_mgmt
*mgmt
;
3223 struct ieee802_11_elems elems
;
3226 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3227 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3228 fc
= le16_to_cpu(mgmt
->frame_control
);
3232 switch (fc
& IEEE80211_FCTL_STYPE
) {
3233 case IEEE80211_STYPE_BEACON
:
3234 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3236 case IEEE80211_STYPE_PROBE_RESP
:
3237 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3239 case IEEE80211_STYPE_AUTH
:
3240 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3242 case IEEE80211_STYPE_DEAUTH
:
3243 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3245 case IEEE80211_STYPE_DISASSOC
:
3246 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3248 case IEEE80211_STYPE_ASSOC_RESP
:
3249 case IEEE80211_STYPE_REASSOC_RESP
:
3250 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3252 case IEEE80211_STYPE_ACTION
:
3253 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3254 ies_len
= skb
->len
-
3255 offsetof(struct ieee80211_mgmt
,
3256 u
.action
.u
.chan_switch
.variable
);
3261 ieee802_11_parse_elems(
3262 mgmt
->u
.action
.u
.chan_switch
.variable
,
3263 ies_len
, true, &elems
);
3265 if (elems
.parse_error
)
3268 ieee80211_sta_process_chanswitch(sdata
,
3271 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3272 ies_len
= skb
->len
-
3273 offsetof(struct ieee80211_mgmt
,
3274 u
.action
.u
.ext_chan_switch
.variable
);
3279 ieee802_11_parse_elems(
3280 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3281 ies_len
, true, &elems
);
3283 if (elems
.parse_error
)
3286 /* for the handling code pretend this was also an IE */
3287 elems
.ext_chansw_ie
=
3288 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3290 ieee80211_sta_process_chanswitch(sdata
,
3296 sdata_unlock(sdata
);
3299 static void ieee80211_sta_timer(unsigned long data
)
3301 struct ieee80211_sub_if_data
*sdata
=
3302 (struct ieee80211_sub_if_data
*) data
;
3304 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3307 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3308 u8
*bssid
, u8 reason
, bool tx
)
3310 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3312 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3315 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3316 IEEE80211_DEAUTH_FRAME_LEN
);
3319 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3321 struct ieee80211_local
*local
= sdata
->local
;
3322 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3323 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3326 sdata_assert_lock(sdata
);
3328 if (WARN_ON_ONCE(!auth_data
))
3333 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3334 sdata_info(sdata
, "authentication with %pM timed out\n",
3335 auth_data
->bss
->bssid
);
3338 * Most likely AP is not in the range so remove the
3339 * bss struct for that AP.
3341 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3346 drv_mgd_prepare_tx(local
, sdata
);
3348 if (auth_data
->bss
->proberesp_ies
) {
3352 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3353 auth_data
->bss
->bssid
, auth_data
->tries
,
3354 IEEE80211_AUTH_MAX_TRIES
);
3356 auth_data
->expected_transaction
= 2;
3358 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3359 trans
= auth_data
->sae_trans
;
3360 status
= auth_data
->sae_status
;
3361 auth_data
->expected_transaction
= trans
;
3364 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3365 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3366 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3368 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3369 auth_data
->data
, auth_data
->data_len
,
3370 auth_data
->bss
->bssid
,
3371 auth_data
->bss
->bssid
, NULL
, 0, 0,
3376 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3377 auth_data
->bss
->bssid
, auth_data
->tries
,
3378 IEEE80211_AUTH_MAX_TRIES
);
3381 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3387 * Direct probe is sent to broadcast address as some APs
3388 * will not answer to direct packet in unassociated state.
3390 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
3391 NULL
, 0, (u32
) -1, true, 0,
3392 auth_data
->bss
->channel
, false);
3396 if (tx_flags
== 0) {
3397 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3398 ifmgd
->auth_data
->timeout_started
= true;
3399 run_again(sdata
, auth_data
->timeout
);
3401 auth_data
->timeout_started
= false;
3407 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3409 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3410 struct ieee80211_local
*local
= sdata
->local
;
3412 sdata_assert_lock(sdata
);
3414 assoc_data
->tries
++;
3415 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3416 sdata_info(sdata
, "association with %pM timed out\n",
3417 assoc_data
->bss
->bssid
);
3420 * Most likely AP is not in the range so remove the
3421 * bss struct for that AP.
3423 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3428 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3429 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3430 IEEE80211_ASSOC_MAX_TRIES
);
3431 ieee80211_send_assoc(sdata
);
3433 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3434 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3435 assoc_data
->timeout_started
= true;
3436 run_again(sdata
, assoc_data
->timeout
);
3438 assoc_data
->timeout_started
= false;
3444 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3445 __le16 fc
, bool acked
)
3447 struct ieee80211_local
*local
= sdata
->local
;
3449 sdata
->u
.mgd
.status_fc
= fc
;
3450 sdata
->u
.mgd
.status_acked
= acked
;
3451 sdata
->u
.mgd
.status_received
= true;
3453 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3456 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3458 struct ieee80211_local
*local
= sdata
->local
;
3459 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3463 if (ifmgd
->status_received
) {
3464 __le16 fc
= ifmgd
->status_fc
;
3465 bool status_acked
= ifmgd
->status_acked
;
3467 ifmgd
->status_received
= false;
3468 if (ifmgd
->auth_data
&&
3469 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3471 ifmgd
->auth_data
->timeout
=
3472 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3473 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3475 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3477 ifmgd
->auth_data
->timeout_started
= true;
3478 } else if (ifmgd
->assoc_data
&&
3479 (ieee80211_is_assoc_req(fc
) ||
3480 ieee80211_is_reassoc_req(fc
))) {
3482 ifmgd
->assoc_data
->timeout
=
3483 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3484 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3486 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3488 ifmgd
->assoc_data
->timeout_started
= true;
3492 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3493 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3494 if (ifmgd
->auth_data
->done
) {
3496 * ok ... we waited for assoc but userspace didn't,
3497 * so let's just kill the auth data
3499 ieee80211_destroy_auth_data(sdata
, false);
3500 } else if (ieee80211_probe_auth(sdata
)) {
3503 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3505 ieee80211_destroy_auth_data(sdata
, false);
3507 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3509 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3510 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3512 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3513 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3514 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3515 ieee80211_do_assoc(sdata
)) {
3518 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
3520 ieee80211_destroy_assoc_data(sdata
, false);
3522 cfg80211_assoc_timeout(sdata
->dev
, bssid
);
3524 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3525 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3527 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
3528 IEEE80211_STA_CONNECTION_POLL
) &&
3529 ifmgd
->associated
) {
3533 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3535 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3536 max_tries
= max_nullfunc_tries
;
3538 max_tries
= max_probe_tries
;
3540 /* ACK received for nullfunc probing frame */
3541 if (!ifmgd
->probe_send_count
)
3542 ieee80211_reset_ap_probe(sdata
);
3543 else if (ifmgd
->nullfunc_failed
) {
3544 if (ifmgd
->probe_send_count
< max_tries
) {
3546 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3547 bssid
, ifmgd
->probe_send_count
,
3549 ieee80211_mgd_probe_ap_send(sdata
);
3552 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3554 ieee80211_sta_connection_lost(sdata
, bssid
,
3555 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3558 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3559 run_again(sdata
, ifmgd
->probe_timeout
);
3560 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3562 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3563 bssid
, probe_wait_ms
);
3564 ieee80211_sta_connection_lost(sdata
, bssid
,
3565 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3566 } else if (ifmgd
->probe_send_count
< max_tries
) {
3568 "No probe response from AP %pM after %dms, try %d/%i\n",
3569 bssid
, probe_wait_ms
,
3570 ifmgd
->probe_send_count
, max_tries
);
3571 ieee80211_mgd_probe_ap_send(sdata
);
3574 * We actually lost the connection ... or did we?
3577 wiphy_debug(local
->hw
.wiphy
,
3578 "%s: No probe response from AP %pM"
3579 " after %dms, disconnecting.\n",
3581 bssid
, probe_wait_ms
);
3583 ieee80211_sta_connection_lost(sdata
, bssid
,
3584 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3588 sdata_unlock(sdata
);
3591 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3593 struct ieee80211_sub_if_data
*sdata
=
3594 (struct ieee80211_sub_if_data
*) data
;
3595 struct ieee80211_local
*local
= sdata
->local
;
3597 if (local
->quiescing
)
3600 sdata
->u
.mgd
.connection_loss
= false;
3601 ieee80211_queue_work(&sdata
->local
->hw
,
3602 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3605 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3607 struct ieee80211_sub_if_data
*sdata
=
3608 (struct ieee80211_sub_if_data
*) data
;
3609 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3610 struct ieee80211_local
*local
= sdata
->local
;
3612 if (local
->quiescing
)
3615 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3618 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3620 struct ieee80211_sub_if_data
*sdata
=
3621 container_of(work
, struct ieee80211_sub_if_data
,
3622 u
.mgd
.monitor_work
);
3624 ieee80211_mgd_probe_ap(sdata
, false);
3627 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3631 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3632 __ieee80211_stop_poll(sdata
);
3634 /* let's probe the connection once */
3635 flags
= sdata
->local
->hw
.flags
;
3636 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3637 ieee80211_queue_work(&sdata
->local
->hw
,
3638 &sdata
->u
.mgd
.monitor_work
);
3639 /* and do all the other regular work too */
3640 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3645 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3647 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3650 if (!ifmgd
->associated
) {
3651 sdata_unlock(sdata
);
3655 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3656 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3657 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3658 ieee80211_sta_connection_lost(sdata
,
3659 ifmgd
->associated
->bssid
,
3660 WLAN_REASON_UNSPECIFIED
,
3662 sdata_unlock(sdata
);
3665 sdata_unlock(sdata
);
3669 /* interface setup */
3670 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3672 struct ieee80211_if_managed
*ifmgd
;
3674 ifmgd
= &sdata
->u
.mgd
;
3675 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3676 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3677 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3678 ieee80211_beacon_connection_loss_work
);
3679 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3680 ieee80211_csa_connection_drop_work
);
3681 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3682 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3683 (unsigned long) sdata
);
3684 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3685 (unsigned long) sdata
);
3686 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3687 (unsigned long) sdata
);
3688 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3689 (unsigned long) sdata
);
3692 ifmgd
->powersave
= sdata
->wdev
.ps
;
3693 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
3694 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
3695 ifmgd
->p2p_noa_index
= -1;
3697 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3698 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3700 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3703 /* scan finished notification */
3704 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3706 struct ieee80211_sub_if_data
*sdata
;
3708 /* Restart STA timers */
3710 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3711 if (ieee80211_sdata_running(sdata
))
3712 ieee80211_restart_sta_timer(sdata
);
3717 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3718 unsigned long data
, void *dummy
)
3720 s32 latency_usec
= (s32
) data
;
3721 struct ieee80211_local
*local
=
3722 container_of(nb
, struct ieee80211_local
,
3723 network_latency_notifier
);
3725 mutex_lock(&local
->iflist_mtx
);
3726 ieee80211_recalc_ps(local
, latency_usec
);
3727 mutex_unlock(&local
->iflist_mtx
);
3732 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3733 struct cfg80211_bss
*cbss
)
3735 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3736 const u8
*ht_cap_ie
, *vht_cap_ie
;
3737 const struct ieee80211_ht_cap
*ht_cap
;
3738 const struct ieee80211_vht_cap
*vht_cap
;
3741 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3744 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3745 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3746 ht_cap
= (void *)(ht_cap_ie
+ 2);
3747 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3749 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3750 * "Tx Unequal Modulation Supported" fields.
3754 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3757 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3758 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3762 vht_cap
= (void *)(vht_cap_ie
+ 2);
3763 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3764 for (nss
= 8; nss
> 0; nss
--) {
3765 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3766 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3769 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3770 chains
= max(chains
, nss
);
3776 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3777 struct cfg80211_bss
*cbss
)
3779 struct ieee80211_local
*local
= sdata
->local
;
3780 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3781 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3782 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3783 struct ieee80211_supported_band
*sband
;
3784 struct cfg80211_chan_def chandef
;
3787 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3789 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3790 IEEE80211_STA_DISABLE_80P80MHZ
|
3791 IEEE80211_STA_DISABLE_160MHZ
);
3795 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3796 sband
->ht_cap
.ht_supported
) {
3797 const u8
*ht_oper_ie
, *ht_cap
;
3799 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3800 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3801 ht_oper
= (void *)(ht_oper_ie
+ 2);
3803 ht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3804 if (!ht_cap
|| ht_cap
[1] < sizeof(struct ieee80211_ht_cap
)) {
3805 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3810 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3811 sband
->vht_cap
.vht_supported
) {
3812 const u8
*vht_oper_ie
, *vht_cap
;
3814 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3815 WLAN_EID_VHT_OPERATION
);
3816 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3817 vht_oper
= (void *)(vht_oper_ie
+ 2);
3818 if (vht_oper
&& !ht_oper
) {
3821 "AP advertised VHT without HT, disabling both\n");
3822 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3823 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3826 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3827 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
3828 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3833 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3838 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3843 /* will change later if needed */
3844 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3847 * If this fails (possibly due to channel context sharing
3848 * on incompatible channels, e.g. 80+80 and 160 sharing the
3849 * same control channel) try to use a smaller bandwidth.
3851 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3852 IEEE80211_CHANCTX_SHARED
);
3854 /* don't downgrade for 5 and 10 MHz channels, though. */
3855 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
3856 chandef
.width
== NL80211_CHAN_WIDTH_10
)
3859 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
3860 ifmgd
->flags
|= chandef_downgrade(&chandef
);
3861 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3862 IEEE80211_CHANCTX_SHARED
);
3867 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3868 struct cfg80211_bss
*cbss
, bool assoc
)
3870 struct ieee80211_local
*local
= sdata
->local
;
3871 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3872 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3873 struct sta_info
*new_sta
= NULL
;
3874 bool have_sta
= false;
3877 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3882 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3887 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3893 u32 rates
= 0, basic_rates
= 0;
3894 bool have_higher_than_11mbit
;
3895 int min_rate
= INT_MAX
, min_rate_index
= -1;
3896 struct ieee80211_supported_band
*sband
;
3897 const struct cfg80211_bss_ies
*ies
;
3899 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3901 err
= ieee80211_prep_channel(sdata
, cbss
);
3903 sta_info_free(local
, new_sta
);
3907 ieee80211_get_rates(sband
, bss
->supp_rates
,
3908 bss
->supp_rates_len
,
3909 &rates
, &basic_rates
,
3910 &have_higher_than_11mbit
,
3911 &min_rate
, &min_rate_index
);
3914 * This used to be a workaround for basic rates missing
3915 * in the association response frame. Now that we no
3916 * longer use the basic rates from there, it probably
3917 * doesn't happen any more, but keep the workaround so
3918 * in case some *other* APs are buggy in different ways
3919 * we can connect -- with a warning.
3921 if (!basic_rates
&& min_rate_index
>= 0) {
3923 "No basic rates, using min rate instead\n");
3924 basic_rates
= BIT(min_rate_index
);
3927 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3928 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3930 /* cf. IEEE 802.11 9.2.12 */
3931 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3932 have_higher_than_11mbit
)
3933 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3935 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3937 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3939 /* set timing information */
3940 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3942 ies
= rcu_dereference(cbss
->beacon_ies
);
3946 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3947 sdata
->vif
.bss_conf
.sync_device_ts
=
3948 bss
->device_ts_beacon
;
3949 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
3950 ies
->data
, ies
->len
);
3951 if (tim_ie
&& tim_ie
[1] >= 2)
3952 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
3954 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3955 } else if (!(local
->hw
.flags
&
3956 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
3957 ies
= rcu_dereference(cbss
->proberesp_ies
);
3958 /* must be non-NULL since beacon IEs were NULL */
3959 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3960 sdata
->vif
.bss_conf
.sync_device_ts
=
3961 bss
->device_ts_presp
;
3962 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3964 sdata
->vif
.bss_conf
.sync_tsf
= 0;
3965 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
3966 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3970 /* tell driver about BSSID, basic rates and timing */
3971 ieee80211_bss_info_change_notify(sdata
,
3972 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3973 BSS_CHANGED_BEACON_INT
);
3976 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3978 err
= sta_info_insert(new_sta
);
3982 "failed to insert STA entry for the AP (error %d)\n",
3987 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3993 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3994 struct cfg80211_auth_request
*req
)
3996 struct ieee80211_local
*local
= sdata
->local
;
3997 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3998 struct ieee80211_mgd_auth_data
*auth_data
;
4002 /* prepare auth data structure */
4004 switch (req
->auth_type
) {
4005 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4006 auth_alg
= WLAN_AUTH_OPEN
;
4008 case NL80211_AUTHTYPE_SHARED_KEY
:
4009 if (IS_ERR(local
->wep_tx_tfm
))
4011 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4013 case NL80211_AUTHTYPE_FT
:
4014 auth_alg
= WLAN_AUTH_FT
;
4016 case NL80211_AUTHTYPE_NETWORK_EAP
:
4017 auth_alg
= WLAN_AUTH_LEAP
;
4019 case NL80211_AUTHTYPE_SAE
:
4020 auth_alg
= WLAN_AUTH_SAE
;
4026 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4027 req
->ie_len
, GFP_KERNEL
);
4031 auth_data
->bss
= req
->bss
;
4033 if (req
->sae_data_len
>= 4) {
4034 __le16
*pos
= (__le16
*) req
->sae_data
;
4035 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4036 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4037 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4038 req
->sae_data_len
- 4);
4039 auth_data
->data_len
+= req
->sae_data_len
- 4;
4042 if (req
->ie
&& req
->ie_len
) {
4043 memcpy(&auth_data
->data
[auth_data
->data_len
],
4044 req
->ie
, req
->ie_len
);
4045 auth_data
->data_len
+= req
->ie_len
;
4048 if (req
->key
&& req
->key_len
) {
4049 auth_data
->key_len
= req
->key_len
;
4050 auth_data
->key_idx
= req
->key_idx
;
4051 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4054 auth_data
->algorithm
= auth_alg
;
4056 /* try to authenticate/probe */
4058 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4059 ifmgd
->assoc_data
) {
4064 if (ifmgd
->auth_data
)
4065 ieee80211_destroy_auth_data(sdata
, false);
4067 /* prep auth_data so we don't go into idle on disassoc */
4068 ifmgd
->auth_data
= auth_data
;
4070 if (ifmgd
->associated
) {
4071 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4073 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4074 WLAN_REASON_UNSPECIFIED
,
4077 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4081 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4083 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
4087 err
= ieee80211_probe_auth(sdata
);
4089 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4093 /* hold our own reference */
4094 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4098 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4099 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4100 ifmgd
->auth_data
= NULL
;
4106 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4107 struct cfg80211_assoc_request
*req
)
4109 struct ieee80211_local
*local
= sdata
->local
;
4110 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4111 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4112 struct ieee80211_mgd_assoc_data
*assoc_data
;
4113 const struct cfg80211_bss_ies
*beacon_ies
;
4114 struct ieee80211_supported_band
*sband
;
4115 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4118 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4123 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4129 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4130 assoc_data
->ssid_len
= ssidie
[1];
4133 if (ifmgd
->associated
) {
4134 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4136 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4137 WLAN_REASON_UNSPECIFIED
,
4140 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4144 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4149 if (ifmgd
->assoc_data
) {
4154 if (ifmgd
->auth_data
) {
4157 /* keep sta info, bssid if matching */
4158 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4159 ieee80211_destroy_auth_data(sdata
, match
);
4162 /* prepare assoc data */
4164 ifmgd
->beacon_crc_valid
= false;
4167 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4168 * We still associate in non-HT mode (11a/b/g) if any one of these
4169 * ciphers is configured as pairwise.
4170 * We can set this to true for non-11n hardware, that'll be checked
4171 * separately along with the peer capabilities.
4173 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4174 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4175 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4176 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4177 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4178 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4179 netdev_info(sdata
->dev
,
4180 "disabling HT/VHT due to WEP/TKIP use\n");
4184 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4185 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4186 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4189 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4190 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4192 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4193 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4194 if (!sband
->ht_cap
.ht_supported
||
4195 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4196 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4198 netdev_info(sdata
->dev
,
4199 "disabling HT as WMM/QoS is not supported by the AP\n");
4202 /* disable VHT if we don't support it or the AP doesn't use WMM */
4203 if (!sband
->vht_cap
.vht_supported
||
4204 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4205 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4207 netdev_info(sdata
->dev
,
4208 "disabling VHT as WMM/QoS is not supported by the AP\n");
4211 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4212 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4213 sizeof(ifmgd
->ht_capa_mask
));
4215 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4216 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4217 sizeof(ifmgd
->vht_capa_mask
));
4219 if (req
->ie
&& req
->ie_len
) {
4220 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4221 assoc_data
->ie_len
= req
->ie_len
;
4224 assoc_data
->bss
= req
->bss
;
4226 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4227 if (ifmgd
->powersave
)
4228 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4230 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4232 sdata
->smps_mode
= ifmgd
->req_smps
;
4234 assoc_data
->capability
= req
->bss
->capability
;
4235 assoc_data
->wmm
= bss
->wmm_used
&&
4236 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4237 assoc_data
->supp_rates
= bss
->supp_rates
;
4238 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4241 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4242 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4243 assoc_data
->ap_ht_param
=
4244 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4246 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4247 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4248 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4249 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4250 sizeof(struct ieee80211_vht_cap
));
4252 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4255 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4256 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
) &&
4257 sdata
->wmm_acm
!= 0xff) {
4258 assoc_data
->uapsd
= true;
4259 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4261 assoc_data
->uapsd
= false;
4262 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4265 if (req
->prev_bssid
)
4266 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4269 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4270 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4272 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4273 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4276 if (req
->crypto
.control_port
)
4277 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4279 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4281 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4282 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4284 /* kick off associate process */
4286 ifmgd
->assoc_data
= assoc_data
;
4287 ifmgd
->dtim_period
= 0;
4288 ifmgd
->have_beacon
= false;
4290 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4295 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4297 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4300 * Wait up to one beacon interval ...
4301 * should this be more if we miss one?
4303 sdata_info(sdata
, "waiting for beacon from %pM\n",
4305 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4306 assoc_data
->timeout_started
= true;
4307 assoc_data
->need_beacon
= true;
4308 } else if (beacon_ies
) {
4309 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4314 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4315 const struct ieee80211_tim_ie
*tim
;
4316 tim
= (void *)(tim_ie
+ 2);
4317 ifmgd
->dtim_period
= tim
->dtim_period
;
4318 dtim_count
= tim
->dtim_count
;
4320 ifmgd
->have_beacon
= true;
4321 assoc_data
->timeout
= jiffies
;
4322 assoc_data
->timeout_started
= true;
4324 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4325 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4326 sdata
->vif
.bss_conf
.sync_device_ts
=
4327 bss
->device_ts_beacon
;
4328 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4331 assoc_data
->timeout
= jiffies
;
4332 assoc_data
->timeout_started
= true;
4336 run_again(sdata
, assoc_data
->timeout
);
4338 if (bss
->corrupt_data
) {
4339 char *corrupt_type
= "data";
4340 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4341 if (bss
->corrupt_data
&
4342 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4343 corrupt_type
= "beacon and probe response";
4345 corrupt_type
= "beacon";
4346 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4347 corrupt_type
= "probe response";
4348 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4354 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4355 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4356 ifmgd
->assoc_data
= NULL
;
4362 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4363 struct cfg80211_deauth_request
*req
)
4365 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4366 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4367 bool tx
= !req
->local_state_change
;
4368 bool report_frame
= false;
4371 "deauthenticating from %pM by local choice (reason=%d)\n",
4372 req
->bssid
, req
->reason_code
);
4374 if (ifmgd
->auth_data
) {
4375 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4376 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4377 IEEE80211_STYPE_DEAUTH
,
4378 req
->reason_code
, tx
,
4380 ieee80211_destroy_auth_data(sdata
, false);
4382 report_frame
= true;
4386 if (ifmgd
->associated
&&
4387 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4388 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4389 req
->reason_code
, tx
, frame_buf
);
4390 report_frame
= true;
4395 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4396 IEEE80211_DEAUTH_FRAME_LEN
);
4401 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4402 struct cfg80211_disassoc_request
*req
)
4404 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4406 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4409 * cfg80211 should catch this ... but it's racy since
4410 * we can receive a disassoc frame, process it, hand it
4411 * to cfg80211 while that's in a locked section already
4412 * trying to tell us that the user wants to disconnect.
4414 if (ifmgd
->associated
!= req
->bss
)
4418 "disassociating from %pM by local choice (reason=%d)\n",
4419 req
->bss
->bssid
, req
->reason_code
);
4421 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4422 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4423 req
->reason_code
, !req
->local_state_change
,
4426 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4427 IEEE80211_DEAUTH_FRAME_LEN
);
4432 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4434 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4437 * Make sure some work items will not run after this,
4438 * they will not do anything but might not have been
4439 * cancelled when disconnecting.
4441 cancel_work_sync(&ifmgd
->monitor_work
);
4442 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4443 cancel_work_sync(&ifmgd
->request_smps_work
);
4444 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4445 cancel_work_sync(&ifmgd
->chswitch_work
);
4448 if (ifmgd
->assoc_data
)
4449 ieee80211_destroy_assoc_data(sdata
, false);
4450 if (ifmgd
->auth_data
)
4451 ieee80211_destroy_auth_data(sdata
, false);
4452 del_timer_sync(&ifmgd
->timer
);
4453 sdata_unlock(sdata
);
4456 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4457 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4460 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4462 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4464 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4466 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);