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_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
43 static int max_nullfunc_tries
= 2;
44 module_param(max_nullfunc_tries
, int, 0644);
45 MODULE_PARM_DESC(max_nullfunc_tries
,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48 static int max_probe_tries
= 5;
49 module_param(max_probe_tries
, int, 0644);
50 MODULE_PARM_DESC(max_probe_tries
,
51 "Maximum probe tries before disconnecting (reason 4).");
54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
61 static int beacon_loss_count
= 7;
62 module_param(beacon_loss_count
, int, 0644);
63 MODULE_PARM_DESC(beacon_loss_count
,
64 "Number of beacon intervals before we decide beacon was lost.");
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
76 static int probe_wait_ms
= 500;
77 module_param(probe_wait_ms
, int, 0644);
78 MODULE_PARM_DESC(probe_wait_ms
,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
105 static void run_again(struct ieee80211_sub_if_data
*sdata
,
106 unsigned long timeout
)
108 sdata_assert_lock(sdata
);
110 if (!timer_pending(&sdata
->u
.mgd
.timer
) ||
111 time_before(timeout
, sdata
->u
.mgd
.timer
.expires
))
112 mod_timer(&sdata
->u
.mgd
.timer
, timeout
);
115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
117 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
120 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
123 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
124 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
131 if (unlikely(!sdata
->u
.mgd
.associated
))
134 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
137 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
138 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
140 ifmgd
->probe_send_count
= 0;
143 static int ecw2cw(int ecw
)
145 return (1 << ecw
) - 1;
148 static u32
chandef_downgrade(struct cfg80211_chan_def
*c
)
154 case NL80211_CHAN_WIDTH_20
:
155 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
156 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
158 case NL80211_CHAN_WIDTH_40
:
159 c
->width
= NL80211_CHAN_WIDTH_20
;
160 c
->center_freq1
= c
->chan
->center_freq
;
161 ret
= IEEE80211_STA_DISABLE_40MHZ
|
162 IEEE80211_STA_DISABLE_VHT
;
164 case NL80211_CHAN_WIDTH_80
:
165 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
169 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
170 c
->width
= NL80211_CHAN_WIDTH_40
;
171 ret
= IEEE80211_STA_DISABLE_VHT
;
173 case NL80211_CHAN_WIDTH_80P80
:
175 c
->width
= NL80211_CHAN_WIDTH_80
;
176 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
177 IEEE80211_STA_DISABLE_160MHZ
;
179 case NL80211_CHAN_WIDTH_160
:
181 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
184 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
185 c
->width
= NL80211_CHAN_WIDTH_80
;
186 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
187 IEEE80211_STA_DISABLE_160MHZ
;
190 case NL80211_CHAN_WIDTH_20_NOHT
:
192 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
193 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
195 case NL80211_CHAN_WIDTH_5
:
196 case NL80211_CHAN_WIDTH_10
:
199 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
203 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
209 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
210 struct ieee80211_supported_band
*sband
,
211 struct ieee80211_channel
*channel
,
212 const struct ieee80211_ht_operation
*ht_oper
,
213 const struct ieee80211_vht_operation
*vht_oper
,
214 struct cfg80211_chan_def
*chandef
, bool tracking
)
216 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
217 struct cfg80211_chan_def vht_chandef
;
220 chandef
->chan
= channel
;
221 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
222 chandef
->center_freq1
= channel
->center_freq
;
223 chandef
->center_freq2
= 0;
225 if (!ht_oper
|| !sband
->ht_cap
.ht_supported
) {
226 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
230 chandef
->width
= NL80211_CHAN_WIDTH_20
;
232 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
234 /* check that channel matches the right operating channel */
235 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
237 * It's possible that some APs are confused here;
238 * Netgear WNDR3700 sometimes reports 4 higher than
239 * the actual channel in association responses, but
240 * since we look at probe response/beacon data here
244 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
245 channel
->center_freq
, ht_cfreq
,
246 ht_oper
->primary_chan
, channel
->band
);
247 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
251 /* check 40 MHz support, if we have it */
252 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
253 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
254 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
255 chandef
->width
= NL80211_CHAN_WIDTH_40
;
256 chandef
->center_freq1
+= 10;
258 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
259 chandef
->width
= NL80211_CHAN_WIDTH_40
;
260 chandef
->center_freq1
-= 10;
264 /* 40 MHz (and 80 MHz) must be supported for VHT */
265 ret
= IEEE80211_STA_DISABLE_VHT
;
266 /* also mark 40 MHz disabled */
267 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
271 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
272 ret
= IEEE80211_STA_DISABLE_VHT
;
276 vht_chandef
.chan
= channel
;
277 vht_chandef
.center_freq1
=
278 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
280 vht_chandef
.center_freq2
= 0;
282 switch (vht_oper
->chan_width
) {
283 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
284 vht_chandef
.width
= chandef
->width
;
286 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
287 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
289 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
290 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
292 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
293 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
294 vht_chandef
.center_freq2
=
295 ieee80211_channel_to_frequency(
296 vht_oper
->center_freq_seg2_idx
,
300 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
302 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
303 vht_oper
->chan_width
);
304 ret
= IEEE80211_STA_DISABLE_VHT
;
308 if (!cfg80211_chandef_valid(&vht_chandef
)) {
309 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
311 "AP VHT information is invalid, disable VHT\n");
312 ret
= IEEE80211_STA_DISABLE_VHT
;
316 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
321 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
322 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
324 "AP VHT information doesn't match HT, disable VHT\n");
325 ret
= IEEE80211_STA_DISABLE_VHT
;
329 *chandef
= vht_chandef
;
334 /* don't print the message below for VHT mismatch if VHT is disabled */
335 if (ret
& IEEE80211_STA_DISABLE_VHT
)
336 vht_chandef
= *chandef
;
339 * Ignore the DISABLED flag when we're already connected and only
340 * tracking the APs beacon for bandwidth changes - otherwise we
341 * might get disconnected here if we connect to an AP, update our
342 * regulatory information based on the AP's country IE and the
343 * information we have is wrong/outdated and disables the channel
344 * that we're actually using for the connection to the AP.
346 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
348 IEEE80211_CHAN_DISABLED
)) {
349 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
350 ret
= IEEE80211_STA_DISABLE_HT
|
351 IEEE80211_STA_DISABLE_VHT
;
355 ret
|= chandef_downgrade(chandef
);
358 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
360 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
362 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
366 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
367 struct sta_info
*sta
,
368 const struct ieee80211_ht_operation
*ht_oper
,
369 const struct ieee80211_vht_operation
*vht_oper
,
370 const u8
*bssid
, u32
*changed
)
372 struct ieee80211_local
*local
= sdata
->local
;
373 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
374 struct ieee80211_supported_band
*sband
;
375 struct ieee80211_channel
*chan
;
376 struct cfg80211_chan_def chandef
;
379 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
382 /* if HT was/is disabled, don't track any bandwidth changes */
383 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
386 /* don't check VHT if we associated as non-VHT station */
387 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
390 if (WARN_ON_ONCE(!sta
))
393 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
394 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
396 /* calculate new channel (type) based on HT/VHT operation IEs */
397 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
, ht_oper
,
398 vht_oper
, &chandef
, true);
401 * Downgrade the new channel if we associated with restricted
402 * capabilities. For example, if we associated as a 20 MHz STA
403 * to a 40 MHz AP (due to regulatory, capabilities or config
404 * reasons) then switching to a 40 MHz channel now won't do us
405 * any good -- we couldn't use it with the AP.
407 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
408 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
409 flags
|= chandef_downgrade(&chandef
);
410 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
411 chandef
.width
== NL80211_CHAN_WIDTH_160
)
412 flags
|= chandef_downgrade(&chandef
);
413 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
414 chandef
.width
> NL80211_CHAN_WIDTH_20
)
415 flags
|= chandef_downgrade(&chandef
);
417 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
421 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
422 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
423 chandef
.center_freq1
, chandef
.center_freq2
);
425 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
426 IEEE80211_STA_DISABLE_VHT
|
427 IEEE80211_STA_DISABLE_40MHZ
|
428 IEEE80211_STA_DISABLE_80P80MHZ
|
429 IEEE80211_STA_DISABLE_160MHZ
)) ||
430 !cfg80211_chandef_valid(&chandef
)) {
432 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
437 switch (chandef
.width
) {
438 case NL80211_CHAN_WIDTH_20_NOHT
:
439 case NL80211_CHAN_WIDTH_20
:
440 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
442 case NL80211_CHAN_WIDTH_40
:
443 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
445 case NL80211_CHAN_WIDTH_80
:
446 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
448 case NL80211_CHAN_WIDTH_80P80
:
449 case NL80211_CHAN_WIDTH_160
:
450 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
456 if (new_sta_bw
> sta
->cur_max_bandwidth
)
457 new_sta_bw
= sta
->cur_max_bandwidth
;
459 if (new_sta_bw
< sta
->sta
.bandwidth
) {
460 sta
->sta
.bandwidth
= new_sta_bw
;
461 rate_control_rate_update(local
, sband
, sta
,
462 IEEE80211_RC_BW_CHANGED
);
465 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
468 "AP %pM changed bandwidth to incompatible one - disconnect\n",
473 if (new_sta_bw
> sta
->sta
.bandwidth
) {
474 sta
->sta
.bandwidth
= new_sta_bw
;
475 rate_control_rate_update(local
, sband
, sta
,
476 IEEE80211_RC_BW_CHANGED
);
479 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
481 /* if bss configuration changed store the new one */
482 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
483 *changed
|= BSS_CHANGED_HT
;
484 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
490 /* frame sending functions */
492 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
493 struct ieee80211_supported_band
*sband
,
499 for (i
= 0; i
< supp_rates_len
; i
++) {
500 int rate
= (supp_rates
[i
] & 0x7F) * 5;
502 for (j
= 0; j
< sband
->n_bitrates
; j
++)
503 if (sband
->bitrates
[j
].bitrate
== rate
) {
513 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
514 struct sk_buff
*skb
, u8 ap_ht_param
,
515 struct ieee80211_supported_band
*sband
,
516 struct ieee80211_channel
*channel
,
517 enum ieee80211_smps_mode smps
)
520 u32 flags
= channel
->flags
;
522 struct ieee80211_sta_ht_cap ht_cap
;
524 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
526 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
527 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
529 /* determine capability flags */
532 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
533 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
534 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
535 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
536 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
539 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
540 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
541 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
542 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
548 * If 40 MHz was disabled associate as though we weren't
549 * capable of 40 MHz -- some broken APs will never fall
550 * back to trying to transmit in 20 MHz.
552 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
553 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
554 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
557 /* set SM PS mode properly */
558 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
560 case IEEE80211_SMPS_AUTOMATIC
:
561 case IEEE80211_SMPS_NUM_MODES
:
563 case IEEE80211_SMPS_OFF
:
564 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
565 IEEE80211_HT_CAP_SM_PS_SHIFT
;
567 case IEEE80211_SMPS_STATIC
:
568 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
569 IEEE80211_HT_CAP_SM_PS_SHIFT
;
571 case IEEE80211_SMPS_DYNAMIC
:
572 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
573 IEEE80211_HT_CAP_SM_PS_SHIFT
;
577 /* reserve and fill IE */
578 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
579 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
582 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
584 struct ieee80211_supported_band
*sband
,
585 struct ieee80211_vht_cap
*ap_vht_cap
)
589 struct ieee80211_sta_vht_cap vht_cap
;
591 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
593 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
594 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
596 /* determine capability flags */
599 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
600 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
;
601 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
604 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
605 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
606 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
610 * Some APs apparently get confused if our capabilities are better
611 * than theirs, so restrict what we advertise in the assoc request.
613 if (!(ap_vht_cap
->vht_cap_info
&
614 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
615 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
617 /* reserve and fill IE */
618 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
619 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
622 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
624 struct ieee80211_local
*local
= sdata
->local
;
625 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
626 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
628 struct ieee80211_mgmt
*mgmt
;
630 size_t offset
= 0, noffset
;
631 int i
, count
, rates_len
, supp_rates_len
;
633 struct ieee80211_supported_band
*sband
;
634 struct ieee80211_chanctx_conf
*chanctx_conf
;
635 struct ieee80211_channel
*chan
;
638 sdata_assert_lock(sdata
);
641 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
642 if (WARN_ON(!chanctx_conf
)) {
646 chan
= chanctx_conf
->def
.chan
;
648 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
650 if (assoc_data
->supp_rates_len
) {
652 * Get all rates supported by the device and the AP as
653 * some APs don't like getting a superset of their rates
654 * in the association request (e.g. D-Link DAP 1353 in
657 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
658 assoc_data
->supp_rates_len
,
662 * In case AP not provide any supported rates information
663 * before association, we send information element(s) with
664 * all rates that we support.
667 rates_len
= sband
->n_bitrates
;
670 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
671 sizeof(*mgmt
) + /* bit too much but doesn't matter */
672 2 + assoc_data
->ssid_len
+ /* SSID */
673 4 + rates_len
+ /* (extended) rates */
674 4 + /* power capability */
675 2 + 2 * sband
->n_channels
+ /* supported channels */
676 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
677 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
678 assoc_data
->ie_len
+ /* extra IEs */
684 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
686 capab
= WLAN_CAPABILITY_ESS
;
688 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
689 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
690 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
691 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
692 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
695 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
696 capab
|= WLAN_CAPABILITY_PRIVACY
;
698 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
699 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
700 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
702 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
704 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
705 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
706 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
708 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
710 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
711 IEEE80211_STYPE_REASSOC_REQ
);
712 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
713 mgmt
->u
.reassoc_req
.listen_interval
=
714 cpu_to_le16(local
->hw
.conf
.listen_interval
);
715 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
719 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
720 IEEE80211_STYPE_ASSOC_REQ
);
721 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
722 mgmt
->u
.assoc_req
.listen_interval
=
723 cpu_to_le16(local
->hw
.conf
.listen_interval
);
727 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
728 *pos
++ = WLAN_EID_SSID
;
729 *pos
++ = assoc_data
->ssid_len
;
730 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
732 /* add all rates which were marked to be used above */
733 supp_rates_len
= rates_len
;
734 if (supp_rates_len
> 8)
737 pos
= skb_put(skb
, supp_rates_len
+ 2);
738 *pos
++ = WLAN_EID_SUPP_RATES
;
739 *pos
++ = supp_rates_len
;
742 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
743 if (BIT(i
) & rates
) {
744 int rate
= sband
->bitrates
[i
].bitrate
;
745 *pos
++ = (u8
) (rate
/ 5);
751 if (rates_len
> count
) {
752 pos
= skb_put(skb
, rates_len
- count
+ 2);
753 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
754 *pos
++ = rates_len
- count
;
756 for (i
++; i
< sband
->n_bitrates
; i
++) {
757 if (BIT(i
) & rates
) {
758 int rate
= sband
->bitrates
[i
].bitrate
;
759 *pos
++ = (u8
) (rate
/ 5);
764 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
765 /* 1. power capabilities */
766 pos
= skb_put(skb
, 4);
767 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
769 *pos
++ = 0; /* min tx power */
770 *pos
++ = chan
->max_power
; /* max tx power */
772 /* 2. supported channels */
773 /* TODO: get this in reg domain format */
774 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
775 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
776 *pos
++ = 2 * sband
->n_channels
;
777 for (i
= 0; i
< sband
->n_channels
; i
++) {
778 *pos
++ = ieee80211_frequency_to_channel(
779 sband
->channels
[i
].center_freq
);
780 *pos
++ = 1; /* one channel in the subband*/
784 /* if present, add any custom IEs that go before HT */
785 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
786 static const u8 before_ht
[] = {
789 WLAN_EID_EXT_SUPP_RATES
,
790 WLAN_EID_PWR_CAPABILITY
,
791 WLAN_EID_SUPPORTED_CHANNELS
,
794 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
795 WLAN_EID_MOBILITY_DOMAIN
,
796 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
798 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
799 before_ht
, ARRAY_SIZE(before_ht
),
801 pos
= skb_put(skb
, noffset
- offset
);
802 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
806 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
807 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
808 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
810 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
811 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
812 sband
, chan
, sdata
->smps_mode
);
814 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
815 ieee80211_add_vht_ie(sdata
, skb
, sband
,
816 &assoc_data
->ap_vht_cap
);
818 /* if present, add any custom non-vendor IEs that go after HT */
819 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
820 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
823 pos
= skb_put(skb
, noffset
- offset
);
824 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
828 if (assoc_data
->wmm
) {
829 if (assoc_data
->uapsd
) {
830 qos_info
= ifmgd
->uapsd_queues
;
831 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
832 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
837 pos
= skb_put(skb
, 9);
838 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
839 *pos
++ = 7; /* len */
840 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
843 *pos
++ = 2; /* WME */
844 *pos
++ = 0; /* WME info */
845 *pos
++ = 1; /* WME ver */
849 /* add any remaining custom (i.e. vendor specific here) IEs */
850 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
851 noffset
= assoc_data
->ie_len
;
852 pos
= skb_put(skb
, noffset
- offset
);
853 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
856 drv_mgd_prepare_tx(local
, sdata
);
858 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
859 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
860 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
861 IEEE80211_TX_INTFL_MLME_CONN_TX
;
862 ieee80211_tx_skb(sdata
, skb
);
865 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
866 struct ieee80211_sub_if_data
*sdata
)
868 struct ieee80211_pspoll
*pspoll
;
871 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
875 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
876 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
878 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
879 ieee80211_tx_skb(sdata
, skb
);
882 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
883 struct ieee80211_sub_if_data
*sdata
,
887 struct ieee80211_hdr_3addr
*nullfunc
;
888 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
890 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
894 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
896 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
898 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
899 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
901 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
902 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
904 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
905 IEEE80211_STA_CONNECTION_POLL
))
906 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
908 ieee80211_tx_skb(sdata
, skb
);
911 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
912 struct ieee80211_sub_if_data
*sdata
)
915 struct ieee80211_hdr
*nullfunc
;
918 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
921 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
925 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
927 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
928 memset(nullfunc
, 0, 30);
929 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
930 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
931 nullfunc
->frame_control
= fc
;
932 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
933 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
934 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
935 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
937 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
938 ieee80211_tx_skb(sdata
, skb
);
941 /* spectrum management related things */
942 static void ieee80211_chswitch_work(struct work_struct
*work
)
944 struct ieee80211_sub_if_data
*sdata
=
945 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
946 struct ieee80211_local
*local
= sdata
->local
;
947 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
949 if (!ieee80211_sdata_running(sdata
))
953 if (!ifmgd
->associated
)
956 local
->_oper_chandef
= local
->csa_chandef
;
958 if (!local
->ops
->channel_switch
) {
959 /* call "hw_config" only if doing sw channel switch */
960 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
962 /* update the device channel directly */
963 local
->hw
.conf
.chandef
= local
->_oper_chandef
;
966 /* XXX: shouldn't really modify cfg80211-owned data! */
967 ifmgd
->associated
->channel
= local
->_oper_chandef
.chan
;
969 /* XXX: wait for a beacon first? */
970 ieee80211_wake_queues_by_reason(&local
->hw
,
971 IEEE80211_MAX_QUEUE_MAP
,
972 IEEE80211_QUEUE_STOP_REASON_CSA
);
974 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
978 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
980 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
981 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
983 trace_api_chswitch_done(sdata
, success
);
986 "driver channel switch failed, disconnecting\n");
987 ieee80211_queue_work(&sdata
->local
->hw
,
988 &ifmgd
->csa_connection_drop_work
);
990 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
993 EXPORT_SYMBOL(ieee80211_chswitch_done
);
995 static void ieee80211_chswitch_timer(unsigned long data
)
997 struct ieee80211_sub_if_data
*sdata
=
998 (struct ieee80211_sub_if_data
*) data
;
1000 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1004 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1005 u64 timestamp
, struct ieee802_11_elems
*elems
,
1008 struct ieee80211_local
*local
= sdata
->local
;
1009 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1010 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1011 struct ieee80211_bss
*bss
;
1012 struct ieee80211_chanctx
*chanctx
;
1013 enum ieee80211_band new_band
;
1018 struct ieee80211_channel
*new_chan
;
1019 struct cfg80211_chan_def new_chandef
= {};
1020 struct cfg80211_chan_def new_vht_chandef
= {};
1021 const struct ieee80211_sec_chan_offs_ie
*sec_chan_offs
;
1022 const struct ieee80211_wide_bw_chansw_ie
*wide_bw_chansw_ie
;
1023 const struct ieee80211_ht_operation
*ht_oper
;
1024 int secondary_channel_offset
= -1;
1026 sdata_assert_lock(sdata
);
1031 if (local
->scanning
)
1034 /* disregard subsequent announcements if we are already processing */
1035 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
1038 sec_chan_offs
= elems
->sec_chan_offs
;
1039 wide_bw_chansw_ie
= elems
->wide_bw_chansw_ie
;
1040 ht_oper
= elems
->ht_operation
;
1042 if (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
1043 IEEE80211_STA_DISABLE_40MHZ
)) {
1044 sec_chan_offs
= NULL
;
1045 wide_bw_chansw_ie
= NULL
;
1046 /* only used for bandwidth here */
1050 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
1051 wide_bw_chansw_ie
= NULL
;
1053 if (elems
->ext_chansw_ie
) {
1054 if (!ieee80211_operating_class_to_band(
1055 elems
->ext_chansw_ie
->new_operating_class
,
1058 "cannot understand ECSA IE operating class %d, disconnecting\n",
1059 elems
->ext_chansw_ie
->new_operating_class
);
1060 ieee80211_queue_work(&local
->hw
,
1061 &ifmgd
->csa_connection_drop_work
);
1063 new_chan_no
= elems
->ext_chansw_ie
->new_ch_num
;
1064 count
= elems
->ext_chansw_ie
->count
;
1065 mode
= elems
->ext_chansw_ie
->mode
;
1066 } else if (elems
->ch_switch_ie
) {
1067 new_band
= cbss
->channel
->band
;
1068 new_chan_no
= elems
->ch_switch_ie
->new_ch_num
;
1069 count
= elems
->ch_switch_ie
->count
;
1070 mode
= elems
->ch_switch_ie
->mode
;
1072 /* nothing here we understand */
1076 bss
= (void *)cbss
->priv
;
1078 new_freq
= ieee80211_channel_to_frequency(new_chan_no
, new_band
);
1079 new_chan
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
1080 if (!new_chan
|| new_chan
->flags
& IEEE80211_CHAN_DISABLED
) {
1082 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1083 ifmgd
->associated
->bssid
, new_freq
);
1084 ieee80211_queue_work(&local
->hw
,
1085 &ifmgd
->csa_connection_drop_work
);
1089 if (!beacon
&& sec_chan_offs
) {
1090 secondary_channel_offset
= sec_chan_offs
->sec_chan_offs
;
1091 } else if (beacon
&& ht_oper
) {
1092 secondary_channel_offset
=
1093 ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
;
1094 } else if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
1096 * If it's not a beacon, HT is enabled and the IE not present,
1097 * it's 20 MHz, 802.11-2012 8.5.2.6:
1098 * This element [the Secondary Channel Offset Element] is
1099 * present when switching to a 40 MHz channel. It may be
1100 * present when switching to a 20 MHz channel (in which
1101 * case the secondary channel offset is set to SCN).
1103 secondary_channel_offset
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1106 switch (secondary_channel_offset
) {
1108 /* secondary_channel_offset was present but is invalid */
1109 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1110 cfg80211_chandef_create(&new_chandef
, new_chan
,
1113 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1114 cfg80211_chandef_create(&new_chandef
, new_chan
,
1115 NL80211_CHAN_HT40PLUS
);
1117 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1118 cfg80211_chandef_create(&new_chandef
, new_chan
,
1119 NL80211_CHAN_HT40MINUS
);
1122 cfg80211_chandef_create(&new_chandef
, new_chan
,
1123 NL80211_CHAN_NO_HT
);
1127 if (wide_bw_chansw_ie
) {
1128 new_vht_chandef
.chan
= new_chan
;
1129 new_vht_chandef
.center_freq1
=
1130 ieee80211_channel_to_frequency(
1131 wide_bw_chansw_ie
->new_center_freq_seg0
,
1134 switch (wide_bw_chansw_ie
->new_channel_width
) {
1136 /* hmmm, ignore VHT and use HT if present */
1137 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
1138 new_vht_chandef
.chan
= NULL
;
1140 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
1141 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
1143 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
1144 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
1146 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
1147 /* field is otherwise reserved */
1148 new_vht_chandef
.center_freq2
=
1149 ieee80211_channel_to_frequency(
1150 wide_bw_chansw_ie
->new_center_freq_seg1
,
1152 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
1155 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
1156 new_vht_chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
1157 chandef_downgrade(&new_vht_chandef
);
1158 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
1159 new_vht_chandef
.width
== NL80211_CHAN_WIDTH_160
)
1160 chandef_downgrade(&new_vht_chandef
);
1161 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
1162 new_vht_chandef
.width
> NL80211_CHAN_WIDTH_20
)
1163 chandef_downgrade(&new_vht_chandef
);
1166 /* if VHT data is there validate & use it */
1167 if (new_vht_chandef
.chan
) {
1168 if (!cfg80211_chandef_compatible(&new_vht_chandef
,
1171 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1172 ifmgd
->associated
->bssid
);
1173 ieee80211_queue_work(&local
->hw
,
1174 &ifmgd
->csa_connection_drop_work
);
1177 new_chandef
= new_vht_chandef
;
1180 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &new_chandef
,
1181 IEEE80211_CHAN_DISABLED
)) {
1183 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1184 ifmgd
->associated
->bssid
, new_freq
,
1185 new_chandef
.width
, new_chandef
.center_freq1
,
1186 new_chandef
.center_freq2
);
1187 ieee80211_queue_work(&local
->hw
,
1188 &ifmgd
->csa_connection_drop_work
);
1192 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
1194 if (local
->use_chanctx
) {
1196 "not handling channel switch with channel contexts\n");
1197 ieee80211_queue_work(&local
->hw
,
1198 &ifmgd
->csa_connection_drop_work
);
1202 mutex_lock(&local
->chanctx_mtx
);
1203 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
1204 mutex_unlock(&local
->chanctx_mtx
);
1207 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
1208 struct ieee80211_chanctx
, conf
);
1209 if (chanctx
->refcount
> 1) {
1211 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1212 ieee80211_queue_work(&local
->hw
,
1213 &ifmgd
->csa_connection_drop_work
);
1214 mutex_unlock(&local
->chanctx_mtx
);
1217 mutex_unlock(&local
->chanctx_mtx
);
1219 local
->csa_chandef
= new_chandef
;
1222 ieee80211_stop_queues_by_reason(&local
->hw
,
1223 IEEE80211_MAX_QUEUE_MAP
,
1224 IEEE80211_QUEUE_STOP_REASON_CSA
);
1226 if (local
->ops
->channel_switch
) {
1227 /* use driver's channel switch callback */
1228 struct ieee80211_channel_switch ch_switch
= {
1229 .timestamp
= timestamp
,
1231 .chandef
= new_chandef
,
1235 drv_channel_switch(local
, &ch_switch
);
1239 /* channel switch handled in software */
1241 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1243 mod_timer(&ifmgd
->chswitch_timer
,
1244 TU_TO_EXP_TIME(count
* cbss
->beacon_interval
));
1247 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1248 struct ieee80211_channel
*channel
,
1249 const u8
*country_ie
, u8 country_ie_len
,
1250 const u8
*pwr_constr_elem
)
1252 struct ieee80211_country_ie_triplet
*triplet
;
1253 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1254 int i
, chan_pwr
, chan_increment
, new_ap_level
;
1255 bool have_chan_pwr
= false;
1258 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1261 triplet
= (void *)(country_ie
+ 3);
1262 country_ie_len
-= 3;
1264 switch (channel
->band
) {
1268 case IEEE80211_BAND_2GHZ
:
1269 case IEEE80211_BAND_60GHZ
:
1272 case IEEE80211_BAND_5GHZ
:
1278 while (country_ie_len
>= 3) {
1279 u8 first_channel
= triplet
->chans
.first_channel
;
1281 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1284 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1285 if (first_channel
+ i
* chan_increment
== chan
) {
1286 have_chan_pwr
= true;
1287 chan_pwr
= triplet
->chans
.max_power
;
1296 country_ie_len
-= 3;
1302 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
1304 if (sdata
->ap_power_level
== new_ap_level
)
1308 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1309 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
1310 sdata
->u
.mgd
.bssid
);
1311 sdata
->ap_power_level
= new_ap_level
;
1312 if (__ieee80211_recalc_txpower(sdata
))
1313 return BSS_CHANGED_TXPOWER
;
1318 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1319 struct ieee80211_sub_if_data
*sdata
)
1321 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1324 * If we are scanning right now then the parameters will
1325 * take effect when scan finishes.
1327 if (local
->scanning
)
1330 if (conf
->dynamic_ps_timeout
> 0 &&
1331 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1332 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1333 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1335 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1336 ieee80211_send_nullfunc(local
, sdata
, 1);
1338 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1339 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1342 conf
->flags
|= IEEE80211_CONF_PS
;
1343 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1347 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1349 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1351 if (local
->ps_sdata
) {
1352 ieee80211_enable_ps(local
, local
->ps_sdata
);
1353 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1354 conf
->flags
&= ~IEEE80211_CONF_PS
;
1355 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1356 del_timer_sync(&local
->dynamic_ps_timer
);
1357 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1361 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1363 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1364 struct sta_info
*sta
= NULL
;
1365 bool authorized
= false;
1367 if (!mgd
->powersave
)
1373 if (!mgd
->associated
)
1376 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1377 IEEE80211_STA_CONNECTION_POLL
))
1380 if (!mgd
->have_beacon
)
1384 sta
= sta_info_get(sdata
, mgd
->bssid
);
1386 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1392 /* need to hold RTNL or interface lock */
1393 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1395 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1399 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1400 local
->ps_sdata
= NULL
;
1404 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1405 if (!ieee80211_sdata_running(sdata
))
1407 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1408 /* If an AP vif is found, then disable PS
1409 * by setting the count to zero thereby setting
1415 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1421 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1425 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1427 beaconint_us
= ieee80211_tu_to_usec(
1428 found
->vif
.bss_conf
.beacon_int
);
1430 timeout
= local
->dynamic_ps_forced_timeout
;
1433 * Go to full PSM if the user configures a very low
1434 * latency requirement.
1435 * The 2000 second value is there for compatibility
1436 * until the PM_QOS_NETWORK_LATENCY is configured
1439 if (latency
> (1900 * USEC_PER_MSEC
) &&
1440 latency
!= (2000 * USEC_PER_SEC
))
1445 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1447 if (beaconint_us
> latency
) {
1448 local
->ps_sdata
= NULL
;
1451 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1453 /* If the TIM IE is invalid, pretend the value is 1 */
1456 else if (dtimper
> 1)
1457 maxslp
= min_t(int, dtimper
,
1458 latency
/ beaconint_us
);
1460 local
->hw
.conf
.max_sleep_period
= maxslp
;
1461 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1462 local
->ps_sdata
= found
;
1465 local
->ps_sdata
= NULL
;
1468 ieee80211_change_ps(local
);
1471 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1473 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1475 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1476 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1477 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1481 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1483 struct ieee80211_local
*local
=
1484 container_of(work
, struct ieee80211_local
,
1485 dynamic_ps_disable_work
);
1487 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1488 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1489 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1492 ieee80211_wake_queues_by_reason(&local
->hw
,
1493 IEEE80211_MAX_QUEUE_MAP
,
1494 IEEE80211_QUEUE_STOP_REASON_PS
);
1497 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1499 struct ieee80211_local
*local
=
1500 container_of(work
, struct ieee80211_local
,
1501 dynamic_ps_enable_work
);
1502 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1503 struct ieee80211_if_managed
*ifmgd
;
1504 unsigned long flags
;
1507 /* can only happen when PS was just disabled anyway */
1511 ifmgd
= &sdata
->u
.mgd
;
1513 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1516 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1517 /* don't enter PS if TX frames are pending */
1518 if (drv_tx_frames_pending(local
)) {
1519 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1521 local
->hw
.conf
.dynamic_ps_timeout
));
1526 * transmission can be stopped by others which leads to
1527 * dynamic_ps_timer expiry. Postpone the ps timer if it
1528 * is not the actual idle state.
1530 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1531 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1532 if (local
->queue_stop_reasons
[q
]) {
1533 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1535 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1537 local
->hw
.conf
.dynamic_ps_timeout
));
1541 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1544 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1545 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1546 if (drv_tx_frames_pending(local
)) {
1547 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1549 local
->hw
.conf
.dynamic_ps_timeout
));
1551 ieee80211_send_nullfunc(local
, sdata
, 1);
1552 /* Flush to get the tx status of nullfunc frame */
1553 ieee80211_flush_queues(local
, sdata
);
1557 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1558 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1559 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1560 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1561 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1562 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1566 void ieee80211_dynamic_ps_timer(unsigned long data
)
1568 struct ieee80211_local
*local
= (void *) data
;
1570 if (local
->quiescing
|| local
->suspended
)
1573 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1576 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1578 struct delayed_work
*delayed_work
=
1579 container_of(work
, struct delayed_work
, work
);
1580 struct ieee80211_sub_if_data
*sdata
=
1581 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1582 dfs_cac_timer_work
);
1584 ieee80211_vif_release_channel(sdata
);
1586 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_FINISHED
, GFP_KERNEL
);
1590 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1591 struct ieee80211_sub_if_data
*sdata
,
1592 const u8
*wmm_param
, size_t wmm_param_len
)
1594 struct ieee80211_tx_queue_params params
;
1595 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1599 u8 uapsd_queues
= 0;
1601 if (!local
->ops
->conf_tx
)
1604 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1610 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1613 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1614 uapsd_queues
= ifmgd
->uapsd_queues
;
1616 count
= wmm_param
[6] & 0x0f;
1617 if (count
== ifmgd
->wmm_last_param_set
)
1619 ifmgd
->wmm_last_param_set
= count
;
1621 pos
= wmm_param
+ 8;
1622 left
= wmm_param_len
- 8;
1624 memset(¶ms
, 0, sizeof(params
));
1627 for (; left
>= 4; left
-= 4, pos
+= 4) {
1628 int aci
= (pos
[0] >> 5) & 0x03;
1629 int acm
= (pos
[0] >> 4) & 0x01;
1637 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1638 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1644 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1645 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1651 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1652 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1659 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1660 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1665 params
.aifs
= pos
[0] & 0x0f;
1666 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1667 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1668 params
.txop
= get_unaligned_le16(pos
+ 2);
1670 params
.uapsd
= uapsd
;
1673 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1675 params
.aifs
, params
.cw_min
, params
.cw_max
,
1676 params
.txop
, params
.uapsd
);
1677 sdata
->tx_conf
[queue
] = params
;
1678 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1680 "failed to set TX queue parameters for queue %d\n",
1684 /* enable WMM or activate new settings */
1685 sdata
->vif
.bss_conf
.qos
= true;
1689 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1691 lockdep_assert_held(&sdata
->local
->mtx
);
1693 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1694 IEEE80211_STA_BEACON_POLL
);
1695 ieee80211_run_deferred_scan(sdata
->local
);
1698 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1700 mutex_lock(&sdata
->local
->mtx
);
1701 __ieee80211_stop_poll(sdata
);
1702 mutex_unlock(&sdata
->local
->mtx
);
1705 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1706 u16 capab
, bool erp_valid
, u8 erp
)
1708 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1710 bool use_protection
;
1711 bool use_short_preamble
;
1712 bool use_short_slot
;
1715 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1716 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1718 use_protection
= false;
1719 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1722 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1723 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1724 use_short_slot
= true;
1726 if (use_protection
!= bss_conf
->use_cts_prot
) {
1727 bss_conf
->use_cts_prot
= use_protection
;
1728 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1731 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1732 bss_conf
->use_short_preamble
= use_short_preamble
;
1733 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1736 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1737 bss_conf
->use_short_slot
= use_short_slot
;
1738 changed
|= BSS_CHANGED_ERP_SLOT
;
1744 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1745 struct cfg80211_bss
*cbss
,
1746 u32 bss_info_changed
)
1748 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1749 struct ieee80211_local
*local
= sdata
->local
;
1750 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1752 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1753 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1754 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1756 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1757 beacon_loss_count
* bss_conf
->beacon_int
));
1759 sdata
->u
.mgd
.associated
= cbss
;
1760 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1762 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1764 if (sdata
->vif
.p2p
) {
1765 const struct cfg80211_bss_ies
*ies
;
1768 ies
= rcu_dereference(cbss
->ies
);
1772 ret
= cfg80211_get_p2p_attr(
1773 ies
->data
, ies
->len
,
1774 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1775 (u8
*) &bss_conf
->p2p_noa_attr
,
1776 sizeof(bss_conf
->p2p_noa_attr
));
1778 sdata
->u
.mgd
.p2p_noa_index
=
1779 bss_conf
->p2p_noa_attr
.index
;
1780 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1786 /* just to be sure */
1787 ieee80211_stop_poll(sdata
);
1789 ieee80211_led_assoc(local
, 1);
1791 if (sdata
->u
.mgd
.have_beacon
) {
1793 * If the AP is buggy we may get here with no DTIM period
1794 * known, so assume it's 1 which is the only safe assumption
1795 * in that case, although if the TIM IE is broken powersave
1796 * probably just won't work at all.
1798 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1799 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1800 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1802 bss_conf
->beacon_rate
= NULL
;
1803 bss_conf
->dtim_period
= 0;
1806 bss_conf
->assoc
= 1;
1808 /* Tell the driver to monitor connection quality (if supported) */
1809 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1810 bss_conf
->cqm_rssi_thold
)
1811 bss_info_changed
|= BSS_CHANGED_CQM
;
1813 /* Enable ARP filtering */
1814 if (bss_conf
->arp_addr_cnt
)
1815 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1817 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1819 mutex_lock(&local
->iflist_mtx
);
1820 ieee80211_recalc_ps(local
, -1);
1821 mutex_unlock(&local
->iflist_mtx
);
1823 ieee80211_recalc_smps(sdata
);
1824 ieee80211_recalc_ps_vif(sdata
);
1826 netif_carrier_on(sdata
->dev
);
1829 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1830 u16 stype
, u16 reason
, bool tx
,
1833 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1834 struct ieee80211_local
*local
= sdata
->local
;
1837 sdata_assert_lock(sdata
);
1839 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1842 if (WARN_ON(!ifmgd
->associated
))
1845 ieee80211_stop_poll(sdata
);
1847 ifmgd
->associated
= NULL
;
1848 netif_carrier_off(sdata
->dev
);
1851 * if we want to get out of ps before disassoc (why?) we have
1852 * to do it before sending disassoc, as otherwise the null-packet
1855 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1856 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1857 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1859 local
->ps_sdata
= NULL
;
1861 /* disable per-vif ps */
1862 ieee80211_recalc_ps_vif(sdata
);
1864 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1866 ieee80211_flush_queues(local
, sdata
);
1868 /* deauthenticate/disassociate now */
1869 if (tx
|| frame_buf
)
1870 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1871 reason
, tx
, frame_buf
);
1873 /* flush out frame */
1875 ieee80211_flush_queues(local
, sdata
);
1877 /* clear bssid only after building the needed mgmt frames */
1878 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1880 /* remove AP and TDLS peers */
1881 sta_info_flush_defer(sdata
);
1883 /* finally reset all BSS / config parameters */
1884 changed
|= ieee80211_reset_erp_info(sdata
);
1886 ieee80211_led_assoc(local
, 0);
1887 changed
|= BSS_CHANGED_ASSOC
;
1888 sdata
->vif
.bss_conf
.assoc
= false;
1890 ifmgd
->p2p_noa_index
= -1;
1891 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
1892 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
1894 /* on the next assoc, re-program HT/VHT parameters */
1895 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1896 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1897 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
1898 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
1900 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1902 del_timer_sync(&local
->dynamic_ps_timer
);
1903 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1905 /* Disable ARP filtering */
1906 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1907 changed
|= BSS_CHANGED_ARP_FILTER
;
1909 sdata
->vif
.bss_conf
.qos
= false;
1910 changed
|= BSS_CHANGED_QOS
;
1912 /* The BSSID (not really interesting) and HT changed */
1913 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1914 ieee80211_bss_info_change_notify(sdata
, changed
);
1916 /* disassociated - set to defaults now */
1917 ieee80211_set_wmm_default(sdata
, false);
1919 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1920 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1921 del_timer_sync(&sdata
->u
.mgd
.timer
);
1922 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1924 sdata
->vif
.bss_conf
.dtim_period
= 0;
1925 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
1927 ifmgd
->have_beacon
= false;
1930 ieee80211_vif_release_channel(sdata
);
1933 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1934 struct ieee80211_hdr
*hdr
)
1937 * We can postpone the mgd.timer whenever receiving unicast frames
1938 * from AP because we know that the connection is working both ways
1939 * at that time. But multicast frames (and hence also beacons) must
1940 * be ignored here, because we need to trigger the timer during
1941 * data idle periods for sending the periodic probe request to the
1942 * AP we're connected to.
1944 if (is_multicast_ether_addr(hdr
->addr1
))
1947 ieee80211_sta_reset_conn_monitor(sdata
);
1950 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1952 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1953 struct ieee80211_local
*local
= sdata
->local
;
1955 mutex_lock(&local
->mtx
);
1956 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1957 IEEE80211_STA_CONNECTION_POLL
))) {
1958 mutex_unlock(&local
->mtx
);
1962 __ieee80211_stop_poll(sdata
);
1964 mutex_lock(&local
->iflist_mtx
);
1965 ieee80211_recalc_ps(local
, -1);
1966 mutex_unlock(&local
->iflist_mtx
);
1968 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1972 * We've received a probe response, but are not sure whether
1973 * we have or will be receiving any beacons or data, so let's
1974 * schedule the timers again, just in case.
1976 ieee80211_sta_reset_beacon_monitor(sdata
);
1978 mod_timer(&ifmgd
->conn_mon_timer
,
1979 round_jiffies_up(jiffies
+
1980 IEEE80211_CONNECTION_IDLE_TIME
));
1982 mutex_unlock(&local
->mtx
);
1985 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1986 struct ieee80211_hdr
*hdr
, bool ack
)
1988 if (!ieee80211_is_data(hdr
->frame_control
))
1991 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1992 sdata
->u
.mgd
.probe_send_count
> 0) {
1994 ieee80211_sta_reset_conn_monitor(sdata
);
1996 sdata
->u
.mgd
.nullfunc_failed
= true;
1997 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2002 ieee80211_sta_reset_conn_monitor(sdata
);
2005 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2007 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2009 u8
*dst
= ifmgd
->associated
->bssid
;
2010 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2013 * Try sending broadcast probe requests for the last three
2014 * probe requests after the first ones failed since some
2015 * buggy APs only support broadcast probe requests.
2017 if (ifmgd
->probe_send_count
>= unicast_limit
)
2021 * When the hardware reports an accurate Tx ACK status, it's
2022 * better to send a nullfunc frame instead of a probe request,
2023 * as it will kick us off the AP quickly if we aren't associated
2024 * anymore. The timeout will be reset if the frame is ACKed by
2027 ifmgd
->probe_send_count
++;
2029 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2030 ifmgd
->nullfunc_failed
= false;
2031 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
2036 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2037 if (WARN_ON_ONCE(ssid
== NULL
))
2042 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
2043 0, (u32
) -1, true, 0,
2044 ifmgd
->associated
->channel
, false);
2048 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2049 run_again(sdata
, ifmgd
->probe_timeout
);
2050 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2051 ieee80211_flush_queues(sdata
->local
, sdata
);
2054 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2057 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2058 bool already
= false;
2060 if (!ieee80211_sdata_running(sdata
))
2065 if (!ifmgd
->associated
)
2068 mutex_lock(&sdata
->local
->mtx
);
2070 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2071 mutex_unlock(&sdata
->local
->mtx
);
2076 mlme_dbg_ratelimited(sdata
,
2077 "detected beacon loss from AP (missed %d beacons) - probing\n",
2080 ieee80211_cqm_rssi_notify(&sdata
->vif
,
2081 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
,
2086 * The driver/our work has already reported this event or the
2087 * connection monitoring has kicked in and we have already sent
2088 * a probe request. Or maybe the AP died and the driver keeps
2089 * reporting until we disassociate...
2091 * In either case we have to ignore the current call to this
2092 * function (except for setting the correct probe reason bit)
2093 * because otherwise we would reset the timer every time and
2094 * never check whether we received a probe response!
2096 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2097 IEEE80211_STA_CONNECTION_POLL
))
2101 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
2103 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2105 mutex_unlock(&sdata
->local
->mtx
);
2110 mutex_lock(&sdata
->local
->iflist_mtx
);
2111 ieee80211_recalc_ps(sdata
->local
, -1);
2112 mutex_unlock(&sdata
->local
->iflist_mtx
);
2114 ifmgd
->probe_send_count
= 0;
2115 ieee80211_mgd_probe_ap_send(sdata
);
2117 sdata_unlock(sdata
);
2120 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2121 struct ieee80211_vif
*vif
)
2123 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2124 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2125 struct cfg80211_bss
*cbss
;
2126 struct sk_buff
*skb
;
2130 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2133 sdata_assert_lock(sdata
);
2135 if (ifmgd
->associated
)
2136 cbss
= ifmgd
->associated
;
2137 else if (ifmgd
->auth_data
)
2138 cbss
= ifmgd
->auth_data
->bss
;
2139 else if (ifmgd
->assoc_data
)
2140 cbss
= ifmgd
->assoc_data
->bss
;
2145 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2146 if (WARN_ON_ONCE(ssid
== NULL
))
2151 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
2152 (u32
) -1, cbss
->channel
,
2159 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2161 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2163 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2164 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2167 if (!ifmgd
->associated
) {
2168 sdata_unlock(sdata
);
2172 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2173 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2175 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
2176 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
2177 IEEE80211_MAX_QUEUE_MAP
,
2178 IEEE80211_QUEUE_STOP_REASON_CSA
);
2180 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
2181 IEEE80211_DEAUTH_FRAME_LEN
);
2182 sdata_unlock(sdata
);
2185 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2187 struct ieee80211_sub_if_data
*sdata
=
2188 container_of(work
, struct ieee80211_sub_if_data
,
2189 u
.mgd
.beacon_connection_loss_work
);
2190 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2191 struct sta_info
*sta
;
2193 if (ifmgd
->associated
) {
2195 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2197 sta
->beacon_loss_count
++;
2201 if (ifmgd
->connection_loss
) {
2202 sdata_info(sdata
, "Connection to AP %pM lost\n",
2204 __ieee80211_disconnect(sdata
);
2206 ieee80211_mgd_probe_ap(sdata
, true);
2210 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2212 struct ieee80211_sub_if_data
*sdata
=
2213 container_of(work
, struct ieee80211_sub_if_data
,
2214 u
.mgd
.csa_connection_drop_work
);
2216 __ieee80211_disconnect(sdata
);
2219 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2221 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2222 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2224 trace_api_beacon_loss(sdata
);
2226 sdata
->u
.mgd
.connection_loss
= false;
2227 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2229 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2231 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2233 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2234 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2236 trace_api_connection_loss(sdata
);
2238 sdata
->u
.mgd
.connection_loss
= true;
2239 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2241 EXPORT_SYMBOL(ieee80211_connection_loss
);
2244 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2247 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2249 sdata_assert_lock(sdata
);
2252 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2254 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2255 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2256 sdata
->u
.mgd
.flags
= 0;
2257 ieee80211_vif_release_channel(sdata
);
2260 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2262 sdata
->u
.mgd
.auth_data
= NULL
;
2265 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2266 struct ieee80211_mgmt
*mgmt
, size_t len
)
2268 struct ieee80211_local
*local
= sdata
->local
;
2269 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2271 struct ieee802_11_elems elems
;
2274 pos
= mgmt
->u
.auth
.variable
;
2275 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2276 if (!elems
.challenge
)
2278 auth_data
->expected_transaction
= 4;
2279 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2280 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2281 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2282 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2283 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2284 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2285 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2286 auth_data
->key
, auth_data
->key_len
,
2287 auth_data
->key_idx
, tx_flags
);
2290 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2291 struct ieee80211_mgmt
*mgmt
, size_t len
)
2293 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2295 u16 auth_alg
, auth_transaction
, status_code
;
2296 struct sta_info
*sta
;
2298 sdata_assert_lock(sdata
);
2303 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2306 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2308 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2311 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2312 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2313 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2315 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2316 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2317 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2318 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2320 ifmgd
->auth_data
->expected_transaction
);
2324 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2325 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2326 mgmt
->sa
, status_code
);
2327 ieee80211_destroy_auth_data(sdata
, false);
2328 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2332 switch (ifmgd
->auth_data
->algorithm
) {
2333 case WLAN_AUTH_OPEN
:
2334 case WLAN_AUTH_LEAP
:
2338 case WLAN_AUTH_SHARED_KEY
:
2339 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2340 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2341 /* need another frame */
2346 WARN_ONCE(1, "invalid auth alg %d",
2347 ifmgd
->auth_data
->algorithm
);
2351 sdata_info(sdata
, "authenticated\n");
2352 ifmgd
->auth_data
->done
= true;
2353 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2354 ifmgd
->auth_data
->timeout_started
= true;
2355 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2357 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2358 ifmgd
->auth_data
->expected_transaction
!= 2) {
2360 * Report auth frame to user space for processing since another
2361 * round of Authentication frames is still needed.
2363 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2367 /* move station state to auth */
2368 mutex_lock(&sdata
->local
->sta_mtx
);
2369 sta
= sta_info_get(sdata
, bssid
);
2371 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2374 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2375 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2378 mutex_unlock(&sdata
->local
->sta_mtx
);
2380 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2383 mutex_unlock(&sdata
->local
->sta_mtx
);
2384 /* ignore frame -- wait for timeout */
2388 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2389 struct ieee80211_mgmt
*mgmt
, size_t len
)
2391 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2392 const u8
*bssid
= NULL
;
2395 sdata_assert_lock(sdata
);
2400 if (!ifmgd
->associated
||
2401 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2404 bssid
= ifmgd
->associated
->bssid
;
2406 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2408 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2409 bssid
, reason_code
);
2411 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2413 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2417 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2418 struct ieee80211_mgmt
*mgmt
, size_t len
)
2420 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2423 sdata_assert_lock(sdata
);
2428 if (!ifmgd
->associated
||
2429 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2432 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2434 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2435 mgmt
->sa
, reason_code
);
2437 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2439 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2442 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2443 u8
*supp_rates
, unsigned int supp_rates_len
,
2444 u32
*rates
, u32
*basic_rates
,
2445 bool *have_higher_than_11mbit
,
2446 int *min_rate
, int *min_rate_index
)
2450 for (i
= 0; i
< supp_rates_len
; i
++) {
2451 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2452 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2455 *have_higher_than_11mbit
= true;
2458 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2459 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2461 * Note: Even through the membership selector and the basic
2462 * rate flag share the same bit, they are not exactly
2465 if (!!(supp_rates
[i
] & 0x80) &&
2466 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2469 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2470 if (sband
->bitrates
[j
].bitrate
== rate
) {
2473 *basic_rates
|= BIT(j
);
2474 if (rate
< *min_rate
) {
2476 *min_rate_index
= j
;
2484 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2487 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2489 sdata_assert_lock(sdata
);
2492 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2494 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2495 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2496 sdata
->u
.mgd
.flags
= 0;
2497 ieee80211_vif_release_channel(sdata
);
2501 sdata
->u
.mgd
.assoc_data
= NULL
;
2504 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2505 struct cfg80211_bss
*cbss
,
2506 struct ieee80211_mgmt
*mgmt
, size_t len
)
2508 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2509 struct ieee80211_local
*local
= sdata
->local
;
2510 struct ieee80211_supported_band
*sband
;
2511 struct sta_info
*sta
;
2513 u16 capab_info
, aid
;
2514 struct ieee802_11_elems elems
;
2515 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2516 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2517 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2522 /* AssocResp and ReassocResp have identical structure */
2524 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2525 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2527 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2528 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2530 aid
&= ~(BIT(15) | BIT(14));
2532 ifmgd
->broken_ap
= false;
2534 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2535 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2538 ifmgd
->broken_ap
= true;
2541 pos
= mgmt
->u
.assoc_resp
.variable
;
2542 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2544 if (!elems
.supp_rates
) {
2545 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2552 * Some APs are erroneously not including some information in their
2553 * (re)association response frames. Try to recover by using the data
2554 * from the beacon or probe response. This seems to afflict mobile
2555 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2556 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2558 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2559 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2560 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2561 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2562 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2563 const struct cfg80211_bss_ies
*ies
;
2564 struct ieee802_11_elems bss_elems
;
2567 ies
= rcu_dereference(cbss
->ies
);
2569 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2575 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2577 if (assoc_data
->wmm
&&
2578 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2579 elems
.wmm_param
= bss_elems
.wmm_param
;
2581 "AP bug: WMM param missing from AssocResp\n");
2585 * Also check if we requested HT/VHT, otherwise the AP doesn't
2586 * have to include the IEs in the (re)association response.
2588 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2589 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2590 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2592 "AP bug: HT capability missing from AssocResp\n");
2594 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2595 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2596 elems
.ht_operation
= bss_elems
.ht_operation
;
2598 "AP bug: HT operation missing from AssocResp\n");
2600 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2601 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2602 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2604 "AP bug: VHT capa missing from AssocResp\n");
2606 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2607 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2608 elems
.vht_operation
= bss_elems
.vht_operation
;
2610 "AP bug: VHT operation missing from AssocResp\n");
2615 * We previously checked these in the beacon/probe response, so
2616 * they should be present here. This is just a safety net.
2618 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2619 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2621 "HT AP is missing WMM params or HT capability/operation\n");
2626 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2627 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2629 "VHT AP is missing VHT capability/operation\n");
2634 mutex_lock(&sdata
->local
->sta_mtx
);
2636 * station info was already allocated and inserted before
2637 * the association and should be available to us
2639 sta
= sta_info_get(sdata
, cbss
->bssid
);
2640 if (WARN_ON(!sta
)) {
2641 mutex_unlock(&sdata
->local
->sta_mtx
);
2646 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2648 /* Set up internal HT/VHT capabilities */
2649 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2650 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2651 elems
.ht_cap_elem
, sta
);
2653 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2654 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2655 elems
.vht_cap_elem
, sta
);
2658 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2659 * in their association response, so ignore that data for our own
2660 * configuration. If it changed since the last beacon, we'll get the
2661 * next beacon and update then.
2665 * If an operating mode notification IE is present, override the
2666 * NSS calculation (that would be done in rate_control_rate_init())
2667 * and use the # of streams from that element.
2669 if (elems
.opmode_notif
&&
2670 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2673 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2674 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2676 sta
->sta
.rx_nss
= nss
;
2679 rate_control_rate_init(sta
);
2681 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2682 set_sta_flag(sta
, WLAN_STA_MFP
);
2684 if (elems
.wmm_param
)
2685 set_sta_flag(sta
, WLAN_STA_WME
);
2687 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2688 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2689 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2692 "failed to move station %pM to desired state\n",
2694 WARN_ON(__sta_info_destroy(sta
));
2695 mutex_unlock(&sdata
->local
->sta_mtx
);
2700 mutex_unlock(&sdata
->local
->sta_mtx
);
2703 * Always handle WMM once after association regardless
2704 * of the first value the AP uses. Setting -1 here has
2705 * that effect because the AP values is an unsigned
2708 ifmgd
->wmm_last_param_set
= -1;
2710 if (elems
.wmm_param
)
2711 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2712 elems
.wmm_param_len
);
2714 ieee80211_set_wmm_default(sdata
, false);
2715 changed
|= BSS_CHANGED_QOS
;
2717 /* set AID and assoc capability,
2718 * ieee80211_set_associated() will tell the driver */
2719 bss_conf
->aid
= aid
;
2720 bss_conf
->assoc_capability
= capab_info
;
2721 ieee80211_set_associated(sdata
, cbss
, changed
);
2724 * If we're using 4-addr mode, let the AP know that we're
2725 * doing so, so that it can create the STA VLAN on its side
2727 if (ifmgd
->use_4addr
)
2728 ieee80211_send_4addr_nullfunc(local
, sdata
);
2731 * Start timer to probe the connection to the AP now.
2732 * Also start the timer that will detect beacon loss.
2734 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2735 ieee80211_sta_reset_beacon_monitor(sdata
);
2743 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2744 struct ieee80211_mgmt
*mgmt
,
2747 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2748 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2749 u16 capab_info
, status_code
, aid
;
2750 struct ieee802_11_elems elems
;
2753 struct cfg80211_bss
*bss
;
2755 sdata_assert_lock(sdata
);
2759 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2763 * AssocResp and ReassocResp have identical structure, so process both
2764 * of them in this function.
2770 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2771 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2772 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2773 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2776 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2777 reassoc
? "Rea" : "A", mgmt
->sa
,
2778 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2780 pos
= mgmt
->u
.assoc_resp
.variable
;
2781 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2783 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2784 elems
.timeout_int
&&
2785 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2787 tu
= le32_to_cpu(elems
.timeout_int
->value
);
2788 ms
= tu
* 1024 / 1000;
2790 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2792 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2793 assoc_data
->timeout_started
= true;
2794 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2795 run_again(sdata
, assoc_data
->timeout
);
2799 bss
= assoc_data
->bss
;
2801 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2802 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2803 mgmt
->sa
, status_code
);
2804 ieee80211_destroy_assoc_data(sdata
, false);
2806 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
2807 /* oops -- internal error -- send timeout for now */
2808 ieee80211_destroy_assoc_data(sdata
, false);
2809 cfg80211_assoc_timeout(sdata
->dev
, bss
);
2812 sdata_info(sdata
, "associated\n");
2815 * destroy assoc_data afterwards, as otherwise an idle
2816 * recalc after assoc_data is NULL but before associated
2817 * is set can cause the interface to go idle
2819 ieee80211_destroy_assoc_data(sdata
, true);
2822 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
);
2825 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2826 struct ieee80211_mgmt
*mgmt
, size_t len
,
2827 struct ieee80211_rx_status
*rx_status
,
2828 struct ieee802_11_elems
*elems
)
2830 struct ieee80211_local
*local
= sdata
->local
;
2832 struct ieee80211_bss
*bss
;
2833 struct ieee80211_channel
*channel
;
2835 sdata_assert_lock(sdata
);
2837 if (elems
->ds_params
)
2838 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2841 freq
= rx_status
->freq
;
2843 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2845 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2848 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2851 ieee80211_rx_bss_put(local
, bss
);
2852 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
2855 if (!sdata
->u
.mgd
.associated
||
2856 !ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
))
2859 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
2865 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2866 struct sk_buff
*skb
)
2868 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2869 struct ieee80211_if_managed
*ifmgd
;
2870 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2871 size_t baselen
, len
= skb
->len
;
2872 struct ieee802_11_elems elems
;
2874 ifmgd
= &sdata
->u
.mgd
;
2876 sdata_assert_lock(sdata
);
2878 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2879 return; /* ignore ProbeResp to foreign address */
2881 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2885 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2888 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2890 if (ifmgd
->associated
&&
2891 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2892 ieee80211_reset_ap_probe(sdata
);
2894 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2895 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2896 /* got probe response, continue with auth */
2897 sdata_info(sdata
, "direct probe responded\n");
2898 ifmgd
->auth_data
->tries
= 0;
2899 ifmgd
->auth_data
->timeout
= jiffies
;
2900 ifmgd
->auth_data
->timeout_started
= true;
2901 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2906 * This is the canonical list of information elements we care about,
2907 * the filter code also gives us all changes to the Microsoft OUI
2908 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2910 * We implement beacon filtering in software since that means we can
2911 * avoid processing the frame here and in cfg80211, and userspace
2912 * will not be able to tell whether the hardware supports it or not.
2914 * XXX: This list needs to be dynamic -- userspace needs to be able to
2915 * add items it requires. It also needs to be able to tell us to
2916 * look out for other vendor IEs.
2918 static const u64 care_about_ies
=
2919 (1ULL << WLAN_EID_COUNTRY
) |
2920 (1ULL << WLAN_EID_ERP_INFO
) |
2921 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2922 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2923 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2924 (1ULL << WLAN_EID_HT_OPERATION
);
2926 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2927 struct ieee80211_mgmt
*mgmt
, size_t len
,
2928 struct ieee80211_rx_status
*rx_status
)
2930 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2931 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2933 struct ieee802_11_elems elems
;
2934 struct ieee80211_local
*local
= sdata
->local
;
2935 struct ieee80211_chanctx_conf
*chanctx_conf
;
2936 struct ieee80211_channel
*chan
;
2937 struct sta_info
*sta
;
2943 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2945 sdata_assert_lock(sdata
);
2947 /* Process beacon from the current BSS */
2948 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2953 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2954 if (!chanctx_conf
) {
2959 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2963 chan
= chanctx_conf
->def
.chan
;
2966 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
2967 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2968 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2969 len
- baselen
, false, &elems
);
2971 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2972 if (elems
.tim
&& !elems
.parse_error
) {
2973 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
2974 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
2976 ifmgd
->have_beacon
= true;
2977 ifmgd
->assoc_data
->need_beacon
= false;
2978 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
2979 sdata
->vif
.bss_conf
.sync_tsf
=
2980 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2981 sdata
->vif
.bss_conf
.sync_device_ts
=
2982 rx_status
->device_timestamp
;
2984 sdata
->vif
.bss_conf
.sync_dtim_count
=
2985 elems
.tim
->dtim_count
;
2987 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
2989 /* continue assoc process */
2990 ifmgd
->assoc_data
->timeout
= jiffies
;
2991 ifmgd
->assoc_data
->timeout_started
= true;
2992 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
2996 if (!ifmgd
->associated
||
2997 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2999 bssid
= ifmgd
->associated
->bssid
;
3001 /* Track average RSSI from the Beacon frames of the current AP */
3002 ifmgd
->last_beacon_signal
= rx_status
->signal
;
3003 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3004 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3005 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
3006 ifmgd
->last_cqm_event_signal
= 0;
3007 ifmgd
->count_beacon_signal
= 1;
3008 ifmgd
->last_ave_beacon_signal
= 0;
3010 ifmgd
->ave_beacon_signal
=
3011 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
3012 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
3013 ifmgd
->ave_beacon_signal
) / 16;
3014 ifmgd
->count_beacon_signal
++;
3017 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3018 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3019 int sig
= ifmgd
->ave_beacon_signal
;
3020 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3023 * if signal crosses either of the boundaries, invoke callback
3024 * with appropriate parameters
3026 if (sig
> ifmgd
->rssi_max_thold
&&
3027 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3028 ifmgd
->last_ave_beacon_signal
= sig
;
3029 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
3030 } else if (sig
< ifmgd
->rssi_min_thold
&&
3031 (last_sig
>= ifmgd
->rssi_max_thold
||
3033 ifmgd
->last_ave_beacon_signal
= sig
;
3034 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
3038 if (bss_conf
->cqm_rssi_thold
&&
3039 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3040 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3041 int sig
= ifmgd
->ave_beacon_signal
/ 16;
3042 int last_event
= ifmgd
->last_cqm_event_signal
;
3043 int thold
= bss_conf
->cqm_rssi_thold
;
3044 int hyst
= bss_conf
->cqm_rssi_hyst
;
3046 (last_event
== 0 || sig
< last_event
- hyst
)) {
3047 ifmgd
->last_cqm_event_signal
= sig
;
3048 ieee80211_cqm_rssi_notify(
3050 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3052 } else if (sig
> thold
&&
3053 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3054 ifmgd
->last_cqm_event_signal
= sig
;
3055 ieee80211_cqm_rssi_notify(
3057 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3062 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
3063 mlme_dbg_ratelimited(sdata
,
3064 "cancelling AP probe due to a received beacon\n");
3065 mutex_lock(&local
->mtx
);
3066 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
3067 ieee80211_run_deferred_scan(local
);
3068 mutex_unlock(&local
->mtx
);
3070 mutex_lock(&local
->iflist_mtx
);
3071 ieee80211_recalc_ps(local
, -1);
3072 mutex_unlock(&local
->iflist_mtx
);
3076 * Push the beacon loss detection into the future since
3077 * we are processing a beacon from the AP just now.
3079 ieee80211_sta_reset_beacon_monitor(sdata
);
3081 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3082 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3083 len
- baselen
, false, &elems
,
3084 care_about_ies
, ncrc
);
3086 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
3087 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
3091 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3092 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3093 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3094 ieee80211_hw_config(local
,
3095 IEEE80211_CONF_CHANGE_PS
);
3097 ieee80211_send_nullfunc(local
, sdata
, 0);
3098 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3099 local
->pspolling
= true;
3102 * Here is assumed that the driver will be
3103 * able to send ps-poll frame and receive a
3104 * response even though power save mode is
3105 * enabled, but some drivers might require
3106 * to disable power save here. This needs
3107 * to be investigated.
3109 ieee80211_send_pspoll(local
, sdata
);
3114 if (sdata
->vif
.p2p
) {
3115 struct ieee80211_p2p_noa_attr noa
= {};
3118 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3120 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3121 (u8
*) &noa
, sizeof(noa
));
3123 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3124 /* valid noa_attr and index changed */
3125 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3126 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3127 changed
|= BSS_CHANGED_P2P_PS
;
3129 * make sure we update all information, the CRC
3130 * mechanism doesn't look at P2P attributes.
3132 ifmgd
->beacon_crc_valid
= false;
3134 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3135 /* noa_attr not found and we had valid noa_attr before */
3136 sdata
->u
.mgd
.p2p_noa_index
= -1;
3137 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3138 changed
|= BSS_CHANGED_P2P_PS
;
3139 ifmgd
->beacon_crc_valid
= false;
3143 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3145 ifmgd
->beacon_crc
= ncrc
;
3146 ifmgd
->beacon_crc_valid
= true;
3148 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3150 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3151 elems
.wmm_param_len
))
3152 changed
|= BSS_CHANGED_QOS
;
3155 * If we haven't had a beacon before, tell the driver about the
3156 * DTIM period (and beacon timing if desired) now.
3158 if (!ifmgd
->have_beacon
) {
3159 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3161 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3163 bss_conf
->dtim_period
= 1;
3165 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3166 sdata
->vif
.bss_conf
.sync_tsf
=
3167 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3168 sdata
->vif
.bss_conf
.sync_device_ts
=
3169 rx_status
->device_timestamp
;
3171 sdata
->vif
.bss_conf
.sync_dtim_count
=
3172 elems
.tim
->dtim_count
;
3174 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3177 changed
|= BSS_CHANGED_BEACON_INFO
;
3178 ifmgd
->have_beacon
= true;
3180 mutex_lock(&local
->iflist_mtx
);
3181 ieee80211_recalc_ps(local
, -1);
3182 mutex_unlock(&local
->iflist_mtx
);
3184 ieee80211_recalc_ps_vif(sdata
);
3187 if (elems
.erp_info
) {
3189 erp_value
= elems
.erp_info
[0];
3193 changed
|= ieee80211_handle_bss_capability(sdata
,
3194 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3195 erp_valid
, erp_value
);
3197 mutex_lock(&local
->sta_mtx
);
3198 sta
= sta_info_get(sdata
, bssid
);
3200 if (ieee80211_config_bw(sdata
, sta
, elems
.ht_operation
,
3201 elems
.vht_operation
, bssid
, &changed
)) {
3202 mutex_unlock(&local
->sta_mtx
);
3203 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3204 WLAN_REASON_DEAUTH_LEAVING
,
3206 cfg80211_tx_mlme_mgmt(sdata
->dev
, deauth_buf
,
3207 sizeof(deauth_buf
));
3211 if (sta
&& elems
.opmode_notif
)
3212 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3213 rx_status
->band
, true);
3214 mutex_unlock(&local
->sta_mtx
);
3216 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
3217 mgmt
->u
.probe_resp
.capab_info
&
3218 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
3219 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
3221 elems
.country_elem_len
,
3222 elems
.pwr_constr_elem
);
3224 ieee80211_bss_info_change_notify(sdata
, changed
);
3227 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3228 struct sk_buff
*skb
)
3230 struct ieee80211_rx_status
*rx_status
;
3231 struct ieee80211_mgmt
*mgmt
;
3233 struct ieee802_11_elems elems
;
3236 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3237 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3238 fc
= le16_to_cpu(mgmt
->frame_control
);
3242 switch (fc
& IEEE80211_FCTL_STYPE
) {
3243 case IEEE80211_STYPE_BEACON
:
3244 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3246 case IEEE80211_STYPE_PROBE_RESP
:
3247 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3249 case IEEE80211_STYPE_AUTH
:
3250 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3252 case IEEE80211_STYPE_DEAUTH
:
3253 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3255 case IEEE80211_STYPE_DISASSOC
:
3256 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3258 case IEEE80211_STYPE_ASSOC_RESP
:
3259 case IEEE80211_STYPE_REASSOC_RESP
:
3260 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3262 case IEEE80211_STYPE_ACTION
:
3263 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3264 ies_len
= skb
->len
-
3265 offsetof(struct ieee80211_mgmt
,
3266 u
.action
.u
.chan_switch
.variable
);
3271 ieee802_11_parse_elems(
3272 mgmt
->u
.action
.u
.chan_switch
.variable
,
3273 ies_len
, true, &elems
);
3275 if (elems
.parse_error
)
3278 ieee80211_sta_process_chanswitch(sdata
,
3281 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3282 ies_len
= skb
->len
-
3283 offsetof(struct ieee80211_mgmt
,
3284 u
.action
.u
.ext_chan_switch
.variable
);
3289 ieee802_11_parse_elems(
3290 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3291 ies_len
, true, &elems
);
3293 if (elems
.parse_error
)
3296 /* for the handling code pretend this was also an IE */
3297 elems
.ext_chansw_ie
=
3298 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3300 ieee80211_sta_process_chanswitch(sdata
,
3306 sdata_unlock(sdata
);
3309 static void ieee80211_sta_timer(unsigned long data
)
3311 struct ieee80211_sub_if_data
*sdata
=
3312 (struct ieee80211_sub_if_data
*) data
;
3314 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3317 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3318 u8
*bssid
, u8 reason
, bool tx
)
3320 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3322 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3325 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3326 IEEE80211_DEAUTH_FRAME_LEN
);
3329 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3331 struct ieee80211_local
*local
= sdata
->local
;
3332 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3333 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3336 sdata_assert_lock(sdata
);
3338 if (WARN_ON_ONCE(!auth_data
))
3343 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3344 sdata_info(sdata
, "authentication with %pM timed out\n",
3345 auth_data
->bss
->bssid
);
3348 * Most likely AP is not in the range so remove the
3349 * bss struct for that AP.
3351 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3356 drv_mgd_prepare_tx(local
, sdata
);
3358 if (auth_data
->bss
->proberesp_ies
) {
3362 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3363 auth_data
->bss
->bssid
, auth_data
->tries
,
3364 IEEE80211_AUTH_MAX_TRIES
);
3366 auth_data
->expected_transaction
= 2;
3368 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3369 trans
= auth_data
->sae_trans
;
3370 status
= auth_data
->sae_status
;
3371 auth_data
->expected_transaction
= trans
;
3374 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3375 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3376 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3378 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3379 auth_data
->data
, auth_data
->data_len
,
3380 auth_data
->bss
->bssid
,
3381 auth_data
->bss
->bssid
, NULL
, 0, 0,
3386 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3387 auth_data
->bss
->bssid
, auth_data
->tries
,
3388 IEEE80211_AUTH_MAX_TRIES
);
3391 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3397 * Direct probe is sent to broadcast address as some APs
3398 * will not answer to direct packet in unassociated state.
3400 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
3401 NULL
, 0, (u32
) -1, true, 0,
3402 auth_data
->bss
->channel
, false);
3406 if (tx_flags
== 0) {
3407 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3408 auth_data
->timeout_started
= true;
3409 run_again(sdata
, auth_data
->timeout
);
3411 auth_data
->timeout
=
3412 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3413 auth_data
->timeout_started
= true;
3414 run_again(sdata
, auth_data
->timeout
);
3420 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3422 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3423 struct ieee80211_local
*local
= sdata
->local
;
3425 sdata_assert_lock(sdata
);
3427 assoc_data
->tries
++;
3428 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3429 sdata_info(sdata
, "association with %pM timed out\n",
3430 assoc_data
->bss
->bssid
);
3433 * Most likely AP is not in the range so remove the
3434 * bss struct for that AP.
3436 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3441 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3442 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3443 IEEE80211_ASSOC_MAX_TRIES
);
3444 ieee80211_send_assoc(sdata
);
3446 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3447 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3448 assoc_data
->timeout_started
= true;
3449 run_again(sdata
, assoc_data
->timeout
);
3451 assoc_data
->timeout
=
3452 round_jiffies_up(jiffies
+
3453 IEEE80211_ASSOC_TIMEOUT_LONG
);
3454 assoc_data
->timeout_started
= true;
3455 run_again(sdata
, assoc_data
->timeout
);
3461 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3462 __le16 fc
, bool acked
)
3464 struct ieee80211_local
*local
= sdata
->local
;
3466 sdata
->u
.mgd
.status_fc
= fc
;
3467 sdata
->u
.mgd
.status_acked
= acked
;
3468 sdata
->u
.mgd
.status_received
= true;
3470 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3473 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3475 struct ieee80211_local
*local
= sdata
->local
;
3476 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3480 if (ifmgd
->status_received
) {
3481 __le16 fc
= ifmgd
->status_fc
;
3482 bool status_acked
= ifmgd
->status_acked
;
3484 ifmgd
->status_received
= false;
3485 if (ifmgd
->auth_data
&&
3486 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3488 ifmgd
->auth_data
->timeout
=
3489 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3490 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3492 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3494 ifmgd
->auth_data
->timeout_started
= true;
3495 } else if (ifmgd
->assoc_data
&&
3496 (ieee80211_is_assoc_req(fc
) ||
3497 ieee80211_is_reassoc_req(fc
))) {
3499 ifmgd
->assoc_data
->timeout
=
3500 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3501 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3503 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3505 ifmgd
->assoc_data
->timeout_started
= true;
3509 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3510 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3511 if (ifmgd
->auth_data
->done
) {
3513 * ok ... we waited for assoc but userspace didn't,
3514 * so let's just kill the auth data
3516 ieee80211_destroy_auth_data(sdata
, false);
3517 } else if (ieee80211_probe_auth(sdata
)) {
3520 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3522 ieee80211_destroy_auth_data(sdata
, false);
3524 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3526 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3527 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3529 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3530 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3531 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3532 ieee80211_do_assoc(sdata
)) {
3533 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3535 ieee80211_destroy_assoc_data(sdata
, false);
3536 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3538 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3539 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3541 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
3542 IEEE80211_STA_CONNECTION_POLL
) &&
3543 ifmgd
->associated
) {
3547 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3549 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3550 max_tries
= max_nullfunc_tries
;
3552 max_tries
= max_probe_tries
;
3554 /* ACK received for nullfunc probing frame */
3555 if (!ifmgd
->probe_send_count
)
3556 ieee80211_reset_ap_probe(sdata
);
3557 else if (ifmgd
->nullfunc_failed
) {
3558 if (ifmgd
->probe_send_count
< max_tries
) {
3560 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3561 bssid
, ifmgd
->probe_send_count
,
3563 ieee80211_mgd_probe_ap_send(sdata
);
3566 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3568 ieee80211_sta_connection_lost(sdata
, bssid
,
3569 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3572 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3573 run_again(sdata
, ifmgd
->probe_timeout
);
3574 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3576 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3577 bssid
, probe_wait_ms
);
3578 ieee80211_sta_connection_lost(sdata
, bssid
,
3579 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3580 } else if (ifmgd
->probe_send_count
< max_tries
) {
3582 "No probe response from AP %pM after %dms, try %d/%i\n",
3583 bssid
, probe_wait_ms
,
3584 ifmgd
->probe_send_count
, max_tries
);
3585 ieee80211_mgd_probe_ap_send(sdata
);
3588 * We actually lost the connection ... or did we?
3591 wiphy_debug(local
->hw
.wiphy
,
3592 "%s: No probe response from AP %pM"
3593 " after %dms, disconnecting.\n",
3595 bssid
, probe_wait_ms
);
3597 ieee80211_sta_connection_lost(sdata
, bssid
,
3598 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3602 sdata_unlock(sdata
);
3605 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3607 struct ieee80211_sub_if_data
*sdata
=
3608 (struct ieee80211_sub_if_data
*) data
;
3609 struct ieee80211_local
*local
= sdata
->local
;
3611 if (local
->quiescing
)
3614 sdata
->u
.mgd
.connection_loss
= false;
3615 ieee80211_queue_work(&sdata
->local
->hw
,
3616 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3619 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3621 struct ieee80211_sub_if_data
*sdata
=
3622 (struct ieee80211_sub_if_data
*) data
;
3623 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3624 struct ieee80211_local
*local
= sdata
->local
;
3626 if (local
->quiescing
)
3629 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3632 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3634 struct ieee80211_sub_if_data
*sdata
=
3635 container_of(work
, struct ieee80211_sub_if_data
,
3636 u
.mgd
.monitor_work
);
3638 ieee80211_mgd_probe_ap(sdata
, false);
3641 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3645 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3646 __ieee80211_stop_poll(sdata
);
3648 /* let's probe the connection once */
3649 flags
= sdata
->local
->hw
.flags
;
3650 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3651 ieee80211_queue_work(&sdata
->local
->hw
,
3652 &sdata
->u
.mgd
.monitor_work
);
3653 /* and do all the other regular work too */
3654 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3659 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3661 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3664 if (!ifmgd
->associated
) {
3665 sdata_unlock(sdata
);
3669 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3670 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3671 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3672 ieee80211_sta_connection_lost(sdata
,
3673 ifmgd
->associated
->bssid
,
3674 WLAN_REASON_UNSPECIFIED
,
3676 sdata_unlock(sdata
);
3679 sdata_unlock(sdata
);
3683 /* interface setup */
3684 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3686 struct ieee80211_if_managed
*ifmgd
;
3688 ifmgd
= &sdata
->u
.mgd
;
3689 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3690 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3691 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3692 ieee80211_beacon_connection_loss_work
);
3693 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3694 ieee80211_csa_connection_drop_work
);
3695 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3696 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3697 (unsigned long) sdata
);
3698 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3699 (unsigned long) sdata
);
3700 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3701 (unsigned long) sdata
);
3702 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3703 (unsigned long) sdata
);
3706 ifmgd
->powersave
= sdata
->wdev
.ps
;
3707 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
3708 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
3709 ifmgd
->p2p_noa_index
= -1;
3711 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3712 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3714 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3717 /* scan finished notification */
3718 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3720 struct ieee80211_sub_if_data
*sdata
;
3722 /* Restart STA timers */
3724 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3725 if (ieee80211_sdata_running(sdata
))
3726 ieee80211_restart_sta_timer(sdata
);
3731 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3732 unsigned long data
, void *dummy
)
3734 s32 latency_usec
= (s32
) data
;
3735 struct ieee80211_local
*local
=
3736 container_of(nb
, struct ieee80211_local
,
3737 network_latency_notifier
);
3739 mutex_lock(&local
->iflist_mtx
);
3740 ieee80211_recalc_ps(local
, latency_usec
);
3741 mutex_unlock(&local
->iflist_mtx
);
3746 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3747 struct cfg80211_bss
*cbss
)
3749 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3750 const u8
*ht_cap_ie
, *vht_cap_ie
;
3751 const struct ieee80211_ht_cap
*ht_cap
;
3752 const struct ieee80211_vht_cap
*vht_cap
;
3755 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3758 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3759 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3760 ht_cap
= (void *)(ht_cap_ie
+ 2);
3761 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3763 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3764 * "Tx Unequal Modulation Supported" fields.
3768 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3771 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3772 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3776 vht_cap
= (void *)(vht_cap_ie
+ 2);
3777 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3778 for (nss
= 8; nss
> 0; nss
--) {
3779 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3780 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3783 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3784 chains
= max(chains
, nss
);
3790 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3791 struct cfg80211_bss
*cbss
)
3793 struct ieee80211_local
*local
= sdata
->local
;
3794 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3795 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3796 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3797 struct ieee80211_supported_band
*sband
;
3798 struct cfg80211_chan_def chandef
;
3801 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3803 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3804 IEEE80211_STA_DISABLE_80P80MHZ
|
3805 IEEE80211_STA_DISABLE_160MHZ
);
3809 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3810 sband
->ht_cap
.ht_supported
) {
3811 const u8
*ht_oper_ie
, *ht_cap
;
3813 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3814 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3815 ht_oper
= (void *)(ht_oper_ie
+ 2);
3817 ht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3818 if (!ht_cap
|| ht_cap
[1] < sizeof(struct ieee80211_ht_cap
)) {
3819 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3824 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3825 sband
->vht_cap
.vht_supported
) {
3826 const u8
*vht_oper_ie
, *vht_cap
;
3828 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3829 WLAN_EID_VHT_OPERATION
);
3830 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3831 vht_oper
= (void *)(vht_oper_ie
+ 2);
3832 if (vht_oper
&& !ht_oper
) {
3835 "AP advertised VHT without HT, disabling both\n");
3836 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3837 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3840 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3841 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
3842 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3847 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3852 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3857 /* will change later if needed */
3858 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3861 * If this fails (possibly due to channel context sharing
3862 * on incompatible channels, e.g. 80+80 and 160 sharing the
3863 * same control channel) try to use a smaller bandwidth.
3865 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3866 IEEE80211_CHANCTX_SHARED
);
3868 /* don't downgrade for 5 and 10 MHz channels, though. */
3869 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
3870 chandef
.width
== NL80211_CHAN_WIDTH_10
)
3873 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
3874 ifmgd
->flags
|= chandef_downgrade(&chandef
);
3875 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3876 IEEE80211_CHANCTX_SHARED
);
3881 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3882 struct cfg80211_bss
*cbss
, bool assoc
)
3884 struct ieee80211_local
*local
= sdata
->local
;
3885 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3886 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3887 struct sta_info
*new_sta
= NULL
;
3888 bool have_sta
= false;
3891 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3896 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3901 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3907 u32 rates
= 0, basic_rates
= 0;
3908 bool have_higher_than_11mbit
;
3909 int min_rate
= INT_MAX
, min_rate_index
= -1;
3910 struct ieee80211_supported_band
*sband
;
3911 const struct cfg80211_bss_ies
*ies
;
3913 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3915 err
= ieee80211_prep_channel(sdata
, cbss
);
3917 sta_info_free(local
, new_sta
);
3921 ieee80211_get_rates(sband
, bss
->supp_rates
,
3922 bss
->supp_rates_len
,
3923 &rates
, &basic_rates
,
3924 &have_higher_than_11mbit
,
3925 &min_rate
, &min_rate_index
);
3928 * This used to be a workaround for basic rates missing
3929 * in the association response frame. Now that we no
3930 * longer use the basic rates from there, it probably
3931 * doesn't happen any more, but keep the workaround so
3932 * in case some *other* APs are buggy in different ways
3933 * we can connect -- with a warning.
3935 if (!basic_rates
&& min_rate_index
>= 0) {
3937 "No basic rates, using min rate instead\n");
3938 basic_rates
= BIT(min_rate_index
);
3941 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3942 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3944 /* cf. IEEE 802.11 9.2.12 */
3945 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3946 have_higher_than_11mbit
)
3947 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3949 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3951 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3953 /* set timing information */
3954 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3956 ies
= rcu_dereference(cbss
->beacon_ies
);
3960 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3961 sdata
->vif
.bss_conf
.sync_device_ts
=
3962 bss
->device_ts_beacon
;
3963 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
3964 ies
->data
, ies
->len
);
3965 if (tim_ie
&& tim_ie
[1] >= 2)
3966 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
3968 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3969 } else if (!(local
->hw
.flags
&
3970 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
3971 ies
= rcu_dereference(cbss
->proberesp_ies
);
3972 /* must be non-NULL since beacon IEs were NULL */
3973 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3974 sdata
->vif
.bss_conf
.sync_device_ts
=
3975 bss
->device_ts_presp
;
3976 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3978 sdata
->vif
.bss_conf
.sync_tsf
= 0;
3979 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
3980 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3984 /* tell driver about BSSID, basic rates and timing */
3985 ieee80211_bss_info_change_notify(sdata
,
3986 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3987 BSS_CHANGED_BEACON_INT
);
3990 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3992 err
= sta_info_insert(new_sta
);
3996 "failed to insert STA entry for the AP (error %d)\n",
4001 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4007 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4008 struct cfg80211_auth_request
*req
)
4010 struct ieee80211_local
*local
= sdata
->local
;
4011 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4012 struct ieee80211_mgd_auth_data
*auth_data
;
4016 /* prepare auth data structure */
4018 switch (req
->auth_type
) {
4019 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4020 auth_alg
= WLAN_AUTH_OPEN
;
4022 case NL80211_AUTHTYPE_SHARED_KEY
:
4023 if (IS_ERR(local
->wep_tx_tfm
))
4025 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4027 case NL80211_AUTHTYPE_FT
:
4028 auth_alg
= WLAN_AUTH_FT
;
4030 case NL80211_AUTHTYPE_NETWORK_EAP
:
4031 auth_alg
= WLAN_AUTH_LEAP
;
4033 case NL80211_AUTHTYPE_SAE
:
4034 auth_alg
= WLAN_AUTH_SAE
;
4040 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4041 req
->ie_len
, GFP_KERNEL
);
4045 auth_data
->bss
= req
->bss
;
4047 if (req
->sae_data_len
>= 4) {
4048 __le16
*pos
= (__le16
*) req
->sae_data
;
4049 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4050 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4051 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4052 req
->sae_data_len
- 4);
4053 auth_data
->data_len
+= req
->sae_data_len
- 4;
4056 if (req
->ie
&& req
->ie_len
) {
4057 memcpy(&auth_data
->data
[auth_data
->data_len
],
4058 req
->ie
, req
->ie_len
);
4059 auth_data
->data_len
+= req
->ie_len
;
4062 if (req
->key
&& req
->key_len
) {
4063 auth_data
->key_len
= req
->key_len
;
4064 auth_data
->key_idx
= req
->key_idx
;
4065 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4068 auth_data
->algorithm
= auth_alg
;
4070 /* try to authenticate/probe */
4072 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4073 ifmgd
->assoc_data
) {
4078 if (ifmgd
->auth_data
)
4079 ieee80211_destroy_auth_data(sdata
, false);
4081 /* prep auth_data so we don't go into idle on disassoc */
4082 ifmgd
->auth_data
= auth_data
;
4084 if (ifmgd
->associated
) {
4085 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4087 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4088 WLAN_REASON_UNSPECIFIED
,
4091 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4095 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4097 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
4101 err
= ieee80211_probe_auth(sdata
);
4103 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4107 /* hold our own reference */
4108 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4112 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4113 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4114 ifmgd
->auth_data
= NULL
;
4120 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4121 struct cfg80211_assoc_request
*req
)
4123 struct ieee80211_local
*local
= sdata
->local
;
4124 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4125 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4126 struct ieee80211_mgd_assoc_data
*assoc_data
;
4127 const struct cfg80211_bss_ies
*beacon_ies
;
4128 struct ieee80211_supported_band
*sband
;
4129 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4132 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4137 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4143 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4144 assoc_data
->ssid_len
= ssidie
[1];
4147 if (ifmgd
->associated
) {
4148 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4150 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4151 WLAN_REASON_UNSPECIFIED
,
4154 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4158 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4163 if (ifmgd
->assoc_data
) {
4168 if (ifmgd
->auth_data
) {
4171 /* keep sta info, bssid if matching */
4172 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4173 ieee80211_destroy_auth_data(sdata
, match
);
4176 /* prepare assoc data */
4178 ifmgd
->beacon_crc_valid
= false;
4181 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4182 * We still associate in non-HT mode (11a/b/g) if any one of these
4183 * ciphers is configured as pairwise.
4184 * We can set this to true for non-11n hardware, that'll be checked
4185 * separately along with the peer capabilities.
4187 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4188 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4189 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4190 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4191 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4192 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4193 netdev_info(sdata
->dev
,
4194 "disabling HT/VHT due to WEP/TKIP use\n");
4198 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4199 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4200 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4203 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4204 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4206 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4207 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4208 if (!sband
->ht_cap
.ht_supported
||
4209 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4210 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4212 netdev_info(sdata
->dev
,
4213 "disabling HT as WMM/QoS is not supported by the AP\n");
4216 /* disable VHT if we don't support it or the AP doesn't use WMM */
4217 if (!sband
->vht_cap
.vht_supported
||
4218 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4219 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4221 netdev_info(sdata
->dev
,
4222 "disabling VHT as WMM/QoS is not supported by the AP\n");
4225 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4226 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4227 sizeof(ifmgd
->ht_capa_mask
));
4229 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4230 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4231 sizeof(ifmgd
->vht_capa_mask
));
4233 if (req
->ie
&& req
->ie_len
) {
4234 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4235 assoc_data
->ie_len
= req
->ie_len
;
4238 assoc_data
->bss
= req
->bss
;
4240 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4241 if (ifmgd
->powersave
)
4242 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4244 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4246 sdata
->smps_mode
= ifmgd
->req_smps
;
4248 assoc_data
->capability
= req
->bss
->capability
;
4249 assoc_data
->wmm
= bss
->wmm_used
&&
4250 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4251 assoc_data
->supp_rates
= bss
->supp_rates
;
4252 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4255 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4256 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4257 assoc_data
->ap_ht_param
=
4258 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4260 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4261 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4262 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4263 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4264 sizeof(struct ieee80211_vht_cap
));
4266 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4269 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4270 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
) &&
4271 sdata
->wmm_acm
!= 0xff) {
4272 assoc_data
->uapsd
= true;
4273 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4275 assoc_data
->uapsd
= false;
4276 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4279 if (req
->prev_bssid
)
4280 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4283 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4284 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4286 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4287 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4290 if (req
->crypto
.control_port
)
4291 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4293 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4295 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4296 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4298 /* kick off associate process */
4300 ifmgd
->assoc_data
= assoc_data
;
4301 ifmgd
->dtim_period
= 0;
4302 ifmgd
->have_beacon
= false;
4304 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4309 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4311 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4314 * Wait up to one beacon interval ...
4315 * should this be more if we miss one?
4317 sdata_info(sdata
, "waiting for beacon from %pM\n",
4319 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4320 assoc_data
->timeout_started
= true;
4321 assoc_data
->need_beacon
= true;
4322 } else if (beacon_ies
) {
4323 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4328 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4329 const struct ieee80211_tim_ie
*tim
;
4330 tim
= (void *)(tim_ie
+ 2);
4331 ifmgd
->dtim_period
= tim
->dtim_period
;
4332 dtim_count
= tim
->dtim_count
;
4334 ifmgd
->have_beacon
= true;
4335 assoc_data
->timeout
= jiffies
;
4336 assoc_data
->timeout_started
= true;
4338 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4339 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4340 sdata
->vif
.bss_conf
.sync_device_ts
=
4341 bss
->device_ts_beacon
;
4342 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4345 assoc_data
->timeout
= jiffies
;
4346 assoc_data
->timeout_started
= true;
4350 run_again(sdata
, assoc_data
->timeout
);
4352 if (bss
->corrupt_data
) {
4353 char *corrupt_type
= "data";
4354 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4355 if (bss
->corrupt_data
&
4356 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4357 corrupt_type
= "beacon and probe response";
4359 corrupt_type
= "beacon";
4360 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4361 corrupt_type
= "probe response";
4362 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4368 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4369 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4370 ifmgd
->assoc_data
= NULL
;
4376 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4377 struct cfg80211_deauth_request
*req
)
4379 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4380 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4381 bool tx
= !req
->local_state_change
;
4382 bool report_frame
= false;
4385 "deauthenticating from %pM by local choice (reason=%d)\n",
4386 req
->bssid
, req
->reason_code
);
4388 if (ifmgd
->auth_data
) {
4389 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4390 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4391 IEEE80211_STYPE_DEAUTH
,
4392 req
->reason_code
, tx
,
4394 ieee80211_destroy_auth_data(sdata
, false);
4396 report_frame
= true;
4400 if (ifmgd
->associated
&&
4401 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4402 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4403 req
->reason_code
, tx
, frame_buf
);
4404 report_frame
= true;
4409 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4410 IEEE80211_DEAUTH_FRAME_LEN
);
4415 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4416 struct cfg80211_disassoc_request
*req
)
4418 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4420 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4423 * cfg80211 should catch this ... but it's racy since
4424 * we can receive a disassoc frame, process it, hand it
4425 * to cfg80211 while that's in a locked section already
4426 * trying to tell us that the user wants to disconnect.
4428 if (ifmgd
->associated
!= req
->bss
)
4432 "disassociating from %pM by local choice (reason=%d)\n",
4433 req
->bss
->bssid
, req
->reason_code
);
4435 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4436 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4437 req
->reason_code
, !req
->local_state_change
,
4440 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4441 IEEE80211_DEAUTH_FRAME_LEN
);
4446 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4448 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4451 * Make sure some work items will not run after this,
4452 * they will not do anything but might not have been
4453 * cancelled when disconnecting.
4455 cancel_work_sync(&ifmgd
->monitor_work
);
4456 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4457 cancel_work_sync(&ifmgd
->request_smps_work
);
4458 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4459 cancel_work_sync(&ifmgd
->chswitch_work
);
4462 if (ifmgd
->assoc_data
) {
4463 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
4464 ieee80211_destroy_assoc_data(sdata
, false);
4465 cfg80211_assoc_timeout(sdata
->dev
, bss
);
4467 if (ifmgd
->auth_data
)
4468 ieee80211_destroy_auth_data(sdata
, false);
4469 del_timer_sync(&ifmgd
->timer
);
4470 sdata_unlock(sdata
);
4473 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4474 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4477 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4479 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4481 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4483 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);