2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35 #define IEEE80211_AUTH_MAX_TRIES 3
36 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
41 static int max_nullfunc_tries
= 2;
42 module_param(max_nullfunc_tries
, int, 0644);
43 MODULE_PARM_DESC(max_nullfunc_tries
,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
46 static int max_probe_tries
= 5;
47 module_param(max_probe_tries
, int, 0644);
48 MODULE_PARM_DESC(max_probe_tries
,
49 "Maximum probe tries before disconnecting (reason 4).");
52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
59 static int beacon_loss_count
= 7;
60 module_param(beacon_loss_count
, int, 0644);
61 MODULE_PARM_DESC(beacon_loss_count
,
62 "Number of beacon intervals before we decide beacon was lost.");
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
68 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
70 * Time we wait for a probe response after sending
71 * a probe request because of beacon loss or for
72 * checking the connection still works.
74 static int probe_wait_ms
= 500;
75 module_param(probe_wait_ms
, int, 0644);
76 MODULE_PARM_DESC(probe_wait_ms
,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
81 * Weight given to the latest Beacon frame when calculating average signal
82 * strength for Beacon frames received in the current BSS. This must be
85 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
88 * How many Beacon frames need to have been used in average signal strength
89 * before starting to indicate signal change events.
91 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
100 /* no action required */
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH
,
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC
,
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH
,
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC
,
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT
,
118 /* used when a processed beacon causes a deauth */
119 RX_MGMT_CFG80211_TX_DEAUTH
,
123 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
125 lockdep_assert_held(&ifmgd
->mtx
);
129 * We can have multiple work items (and connection probing)
130 * scheduling this timer, but we need to take care to only
131 * reschedule it when it should fire _earlier_ than it was
132 * asked for before, or if it's not pending right now. This
133 * function ensures that. Note that it then is required to
134 * run this function for all timeouts after the first one
135 * has happened -- the work that runs from this timer will
138 static void run_again(struct ieee80211_if_managed
*ifmgd
, unsigned long timeout
)
140 ASSERT_MGD_MTX(ifmgd
);
142 if (!timer_pending(&ifmgd
->timer
) ||
143 time_before(timeout
, ifmgd
->timer
.expires
))
144 mod_timer(&ifmgd
->timer
, timeout
);
147 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
149 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
152 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
155 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
156 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
159 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
161 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
163 if (unlikely(!sdata
->u
.mgd
.associated
))
166 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
169 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
170 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
172 ifmgd
->probe_send_count
= 0;
175 static int ecw2cw(int ecw
)
177 return (1 << ecw
) - 1;
180 static u32
chandef_downgrade(struct cfg80211_chan_def
*c
)
186 case NL80211_CHAN_WIDTH_20
:
187 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
188 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
190 case NL80211_CHAN_WIDTH_40
:
191 c
->width
= NL80211_CHAN_WIDTH_20
;
192 c
->center_freq1
= c
->chan
->center_freq
;
193 ret
= IEEE80211_STA_DISABLE_40MHZ
|
194 IEEE80211_STA_DISABLE_VHT
;
196 case NL80211_CHAN_WIDTH_80
:
197 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
201 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
202 c
->width
= NL80211_CHAN_WIDTH_40
;
203 ret
= IEEE80211_STA_DISABLE_VHT
;
205 case NL80211_CHAN_WIDTH_80P80
:
207 c
->width
= NL80211_CHAN_WIDTH_80
;
208 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
209 IEEE80211_STA_DISABLE_160MHZ
;
211 case NL80211_CHAN_WIDTH_160
:
213 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
216 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
217 c
->width
= NL80211_CHAN_WIDTH_80
;
218 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
219 IEEE80211_STA_DISABLE_160MHZ
;
222 case NL80211_CHAN_WIDTH_20_NOHT
:
224 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
225 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
229 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
235 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
236 struct ieee80211_supported_band
*sband
,
237 struct ieee80211_channel
*channel
,
238 const struct ieee80211_ht_operation
*ht_oper
,
239 const struct ieee80211_vht_operation
*vht_oper
,
240 struct cfg80211_chan_def
*chandef
, bool verbose
)
242 struct cfg80211_chan_def vht_chandef
;
245 chandef
->chan
= channel
;
246 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
247 chandef
->center_freq1
= channel
->center_freq
;
248 chandef
->center_freq2
= 0;
250 if (!ht_oper
|| !sband
->ht_cap
.ht_supported
) {
251 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
255 chandef
->width
= NL80211_CHAN_WIDTH_20
;
257 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
259 /* check that channel matches the right operating channel */
260 if (channel
->center_freq
!= ht_cfreq
) {
262 * It's possible that some APs are confused here;
263 * Netgear WNDR3700 sometimes reports 4 higher than
264 * the actual channel in association responses, but
265 * since we look at probe response/beacon data here
270 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
271 channel
->center_freq
, ht_cfreq
,
272 ht_oper
->primary_chan
, channel
->band
);
273 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
277 /* check 40 MHz support, if we have it */
278 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
279 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
281 chandef
->width
= NL80211_CHAN_WIDTH_40
;
282 chandef
->center_freq1
+= 10;
284 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
285 chandef
->width
= NL80211_CHAN_WIDTH_40
;
286 chandef
->center_freq1
-= 10;
290 /* 40 MHz (and 80 MHz) must be supported for VHT */
291 ret
= IEEE80211_STA_DISABLE_VHT
;
292 /* also mark 40 MHz disabled */
293 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
297 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
298 ret
= IEEE80211_STA_DISABLE_VHT
;
302 vht_chandef
.chan
= channel
;
303 vht_chandef
.center_freq1
=
304 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
306 vht_chandef
.center_freq2
= 0;
308 switch (vht_oper
->chan_width
) {
309 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
310 vht_chandef
.width
= chandef
->width
;
312 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
313 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
315 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
316 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
318 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
319 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
320 vht_chandef
.center_freq2
=
321 ieee80211_channel_to_frequency(
322 vht_oper
->center_freq_seg2_idx
,
328 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
329 vht_oper
->chan_width
);
330 ret
= IEEE80211_STA_DISABLE_VHT
;
334 if (!cfg80211_chandef_valid(&vht_chandef
)) {
337 "AP VHT information is invalid, disable VHT\n");
338 ret
= IEEE80211_STA_DISABLE_VHT
;
342 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
347 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
350 "AP VHT information doesn't match HT, disable VHT\n");
351 ret
= IEEE80211_STA_DISABLE_VHT
;
355 *chandef
= vht_chandef
;
360 /* don't print the message below for VHT mismatch if VHT is disabled */
361 if (ret
& IEEE80211_STA_DISABLE_VHT
)
362 vht_chandef
= *chandef
;
364 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
365 IEEE80211_CHAN_DISABLED
)) {
366 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
367 ret
= IEEE80211_STA_DISABLE_HT
|
368 IEEE80211_STA_DISABLE_VHT
;
372 ret
|= chandef_downgrade(chandef
);
375 if (chandef
->width
!= vht_chandef
.width
&& verbose
)
377 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
379 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
383 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
384 struct sta_info
*sta
,
385 const struct ieee80211_ht_operation
*ht_oper
,
386 const struct ieee80211_vht_operation
*vht_oper
,
387 const u8
*bssid
, u32
*changed
)
389 struct ieee80211_local
*local
= sdata
->local
;
390 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
391 struct ieee80211_supported_band
*sband
;
392 struct ieee80211_channel
*chan
;
393 struct cfg80211_chan_def chandef
;
396 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
399 /* if HT was/is disabled, don't track any bandwidth changes */
400 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
403 /* don't check VHT if we associated as non-VHT station */
404 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
407 if (WARN_ON_ONCE(!sta
))
410 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
411 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
413 /* calculate new channel (type) based on HT/VHT operation IEs */
414 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
, ht_oper
,
415 vht_oper
, &chandef
, false);
418 * Downgrade the new channel if we associated with restricted
419 * capabilities. For example, if we associated as a 20 MHz STA
420 * to a 40 MHz AP (due to regulatory, capabilities or config
421 * reasons) then switching to a 40 MHz channel now won't do us
422 * any good -- we couldn't use it with the AP.
424 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
425 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
426 flags
|= chandef_downgrade(&chandef
);
427 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
428 chandef
.width
== NL80211_CHAN_WIDTH_160
)
429 flags
|= chandef_downgrade(&chandef
);
430 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
431 chandef
.width
> NL80211_CHAN_WIDTH_20
)
432 flags
|= chandef_downgrade(&chandef
);
434 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
438 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
439 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
440 chandef
.center_freq1
, chandef
.center_freq2
);
442 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
443 IEEE80211_STA_DISABLE_VHT
|
444 IEEE80211_STA_DISABLE_40MHZ
|
445 IEEE80211_STA_DISABLE_80P80MHZ
|
446 IEEE80211_STA_DISABLE_160MHZ
)) ||
447 !cfg80211_chandef_valid(&chandef
)) {
449 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
454 switch (chandef
.width
) {
455 case NL80211_CHAN_WIDTH_20_NOHT
:
456 case NL80211_CHAN_WIDTH_20
:
457 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
459 case NL80211_CHAN_WIDTH_40
:
460 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
462 case NL80211_CHAN_WIDTH_80
:
463 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
465 case NL80211_CHAN_WIDTH_80P80
:
466 case NL80211_CHAN_WIDTH_160
:
467 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
473 if (new_sta_bw
> sta
->cur_max_bandwidth
)
474 new_sta_bw
= sta
->cur_max_bandwidth
;
476 if (new_sta_bw
< sta
->sta
.bandwidth
) {
477 sta
->sta
.bandwidth
= new_sta_bw
;
478 rate_control_rate_update(local
, sband
, sta
,
479 IEEE80211_RC_BW_CHANGED
);
482 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
485 "AP %pM changed bandwidth to incompatible one - disconnect\n",
490 if (new_sta_bw
> sta
->sta
.bandwidth
) {
491 sta
->sta
.bandwidth
= new_sta_bw
;
492 rate_control_rate_update(local
, sband
, sta
,
493 IEEE80211_RC_BW_CHANGED
);
496 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
498 /* if bss configuration changed store the new one */
499 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
500 *changed
|= BSS_CHANGED_HT
;
501 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
507 /* frame sending functions */
509 static int ieee80211_compatible_rates(const u8
*supp_rates
, int supp_rates_len
,
510 struct ieee80211_supported_band
*sband
,
516 for (i
= 0; i
< supp_rates_len
; i
++) {
517 int rate
= (supp_rates
[i
] & 0x7F) * 5;
519 for (j
= 0; j
< sband
->n_bitrates
; j
++)
520 if (sband
->bitrates
[j
].bitrate
== rate
) {
530 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
531 struct sk_buff
*skb
, u8 ap_ht_param
,
532 struct ieee80211_supported_band
*sband
,
533 struct ieee80211_channel
*channel
,
534 enum ieee80211_smps_mode smps
)
537 u32 flags
= channel
->flags
;
539 struct ieee80211_sta_ht_cap ht_cap
;
541 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
543 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
544 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
546 /* determine capability flags */
549 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
550 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
551 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
552 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
553 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
556 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
557 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
558 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
559 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
565 * If 40 MHz was disabled associate as though we weren't
566 * capable of 40 MHz -- some broken APs will never fall
567 * back to trying to transmit in 20 MHz.
569 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
570 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
571 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
574 /* set SM PS mode properly */
575 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
577 case IEEE80211_SMPS_AUTOMATIC
:
578 case IEEE80211_SMPS_NUM_MODES
:
580 case IEEE80211_SMPS_OFF
:
581 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
582 IEEE80211_HT_CAP_SM_PS_SHIFT
;
584 case IEEE80211_SMPS_STATIC
:
585 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
586 IEEE80211_HT_CAP_SM_PS_SHIFT
;
588 case IEEE80211_SMPS_DYNAMIC
:
589 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
590 IEEE80211_HT_CAP_SM_PS_SHIFT
;
594 /* reserve and fill IE */
595 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
596 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
599 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
601 struct ieee80211_supported_band
*sband
,
602 struct ieee80211_vht_cap
*ap_vht_cap
)
606 struct ieee80211_sta_vht_cap vht_cap
;
608 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
610 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
611 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
613 /* determine capability flags */
616 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
617 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
;
618 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
621 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
622 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
623 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
627 * Some APs apparently get confused if our capabilities are better
628 * than theirs, so restrict what we advertise in the assoc request.
630 if (!(ap_vht_cap
->vht_cap_info
&
631 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
632 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
634 /* reserve and fill IE */
635 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
636 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
639 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
641 struct ieee80211_local
*local
= sdata
->local
;
642 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
643 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
645 struct ieee80211_mgmt
*mgmt
;
647 size_t offset
= 0, noffset
;
648 int i
, count
, rates_len
, supp_rates_len
;
650 struct ieee80211_supported_band
*sband
;
651 struct ieee80211_chanctx_conf
*chanctx_conf
;
652 struct ieee80211_channel
*chan
;
655 lockdep_assert_held(&ifmgd
->mtx
);
658 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
659 if (WARN_ON(!chanctx_conf
)) {
663 chan
= chanctx_conf
->def
.chan
;
665 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
667 if (assoc_data
->supp_rates_len
) {
669 * Get all rates supported by the device and the AP as
670 * some APs don't like getting a superset of their rates
671 * in the association request (e.g. D-Link DAP 1353 in
674 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
675 assoc_data
->supp_rates_len
,
679 * In case AP not provide any supported rates information
680 * before association, we send information element(s) with
681 * all rates that we support.
684 rates_len
= sband
->n_bitrates
;
687 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
688 sizeof(*mgmt
) + /* bit too much but doesn't matter */
689 2 + assoc_data
->ssid_len
+ /* SSID */
690 4 + rates_len
+ /* (extended) rates */
691 4 + /* power capability */
692 2 + 2 * sband
->n_channels
+ /* supported channels */
693 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
694 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
695 assoc_data
->ie_len
+ /* extra IEs */
701 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
703 capab
= WLAN_CAPABILITY_ESS
;
705 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
706 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
707 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
708 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
709 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
712 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
713 capab
|= WLAN_CAPABILITY_PRIVACY
;
715 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
716 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
717 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
719 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
721 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
722 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
723 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
725 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
727 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
728 IEEE80211_STYPE_REASSOC_REQ
);
729 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
730 mgmt
->u
.reassoc_req
.listen_interval
=
731 cpu_to_le16(local
->hw
.conf
.listen_interval
);
732 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
736 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
737 IEEE80211_STYPE_ASSOC_REQ
);
738 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
739 mgmt
->u
.assoc_req
.listen_interval
=
740 cpu_to_le16(local
->hw
.conf
.listen_interval
);
744 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
745 *pos
++ = WLAN_EID_SSID
;
746 *pos
++ = assoc_data
->ssid_len
;
747 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
749 /* add all rates which were marked to be used above */
750 supp_rates_len
= rates_len
;
751 if (supp_rates_len
> 8)
754 pos
= skb_put(skb
, supp_rates_len
+ 2);
755 *pos
++ = WLAN_EID_SUPP_RATES
;
756 *pos
++ = supp_rates_len
;
759 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
760 if (BIT(i
) & rates
) {
761 int rate
= sband
->bitrates
[i
].bitrate
;
762 *pos
++ = (u8
) (rate
/ 5);
768 if (rates_len
> count
) {
769 pos
= skb_put(skb
, rates_len
- count
+ 2);
770 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
771 *pos
++ = rates_len
- count
;
773 for (i
++; i
< sband
->n_bitrates
; i
++) {
774 if (BIT(i
) & rates
) {
775 int rate
= sband
->bitrates
[i
].bitrate
;
776 *pos
++ = (u8
) (rate
/ 5);
781 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
782 /* 1. power capabilities */
783 pos
= skb_put(skb
, 4);
784 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
786 *pos
++ = 0; /* min tx power */
787 *pos
++ = chan
->max_power
; /* max tx power */
789 /* 2. supported channels */
790 /* TODO: get this in reg domain format */
791 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
792 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
793 *pos
++ = 2 * sband
->n_channels
;
794 for (i
= 0; i
< sband
->n_channels
; i
++) {
795 *pos
++ = ieee80211_frequency_to_channel(
796 sband
->channels
[i
].center_freq
);
797 *pos
++ = 1; /* one channel in the subband*/
801 /* if present, add any custom IEs that go before HT */
802 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
803 static const u8 before_ht
[] = {
806 WLAN_EID_EXT_SUPP_RATES
,
807 WLAN_EID_PWR_CAPABILITY
,
808 WLAN_EID_SUPPORTED_CHANNELS
,
811 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
812 WLAN_EID_MOBILITY_DOMAIN
,
813 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
815 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
816 before_ht
, ARRAY_SIZE(before_ht
),
818 pos
= skb_put(skb
, noffset
- offset
);
819 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
823 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
824 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
825 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
827 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
828 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
829 sband
, chan
, sdata
->smps_mode
);
831 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
832 ieee80211_add_vht_ie(sdata
, skb
, sband
,
833 &assoc_data
->ap_vht_cap
);
835 /* if present, add any custom non-vendor IEs that go after HT */
836 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
837 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
840 pos
= skb_put(skb
, noffset
- offset
);
841 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
845 if (assoc_data
->wmm
) {
846 if (assoc_data
->uapsd
) {
847 qos_info
= ifmgd
->uapsd_queues
;
848 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
849 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
854 pos
= skb_put(skb
, 9);
855 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
856 *pos
++ = 7; /* len */
857 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
860 *pos
++ = 2; /* WME */
861 *pos
++ = 0; /* WME info */
862 *pos
++ = 1; /* WME ver */
866 /* add any remaining custom (i.e. vendor specific here) IEs */
867 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
868 noffset
= assoc_data
->ie_len
;
869 pos
= skb_put(skb
, noffset
- offset
);
870 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
873 drv_mgd_prepare_tx(local
, sdata
);
875 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
876 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
877 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
878 IEEE80211_TX_INTFL_MLME_CONN_TX
;
879 ieee80211_tx_skb(sdata
, skb
);
882 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
883 struct ieee80211_sub_if_data
*sdata
)
885 struct ieee80211_pspoll
*pspoll
;
888 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
892 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
893 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
895 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
896 ieee80211_tx_skb(sdata
, skb
);
899 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
900 struct ieee80211_sub_if_data
*sdata
,
904 struct ieee80211_hdr_3addr
*nullfunc
;
905 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
907 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
911 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
913 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
915 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
916 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
917 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
918 IEEE80211_STA_CONNECTION_POLL
))
919 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
921 ieee80211_tx_skb(sdata
, skb
);
924 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
925 struct ieee80211_sub_if_data
*sdata
)
928 struct ieee80211_hdr
*nullfunc
;
931 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
934 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
938 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
940 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
941 memset(nullfunc
, 0, 30);
942 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
943 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
944 nullfunc
->frame_control
= fc
;
945 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
946 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
947 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
948 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
950 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
951 ieee80211_tx_skb(sdata
, skb
);
954 /* spectrum management related things */
955 static void ieee80211_chswitch_work(struct work_struct
*work
)
957 struct ieee80211_sub_if_data
*sdata
=
958 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
959 struct ieee80211_local
*local
= sdata
->local
;
960 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
962 if (!ieee80211_sdata_running(sdata
))
965 mutex_lock(&ifmgd
->mtx
);
966 if (!ifmgd
->associated
)
969 local
->_oper_chandef
= local
->csa_chandef
;
971 if (!local
->ops
->channel_switch
) {
972 /* call "hw_config" only if doing sw channel switch */
973 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_CHANNEL
);
975 /* update the device channel directly */
976 local
->hw
.conf
.chandef
= local
->_oper_chandef
;
979 /* XXX: shouldn't really modify cfg80211-owned data! */
980 ifmgd
->associated
->channel
= local
->_oper_chandef
.chan
;
982 /* XXX: wait for a beacon first? */
983 ieee80211_wake_queues_by_reason(&local
->hw
,
984 IEEE80211_MAX_QUEUE_MAP
,
985 IEEE80211_QUEUE_STOP_REASON_CSA
);
987 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
988 mutex_unlock(&ifmgd
->mtx
);
991 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
993 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
994 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
996 trace_api_chswitch_done(sdata
, success
);
999 "driver channel switch failed, disconnecting\n");
1000 ieee80211_queue_work(&sdata
->local
->hw
,
1001 &ifmgd
->csa_connection_drop_work
);
1003 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1006 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1008 static void ieee80211_chswitch_timer(unsigned long data
)
1010 struct ieee80211_sub_if_data
*sdata
=
1011 (struct ieee80211_sub_if_data
*) data
;
1013 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1017 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1018 u64 timestamp
, struct ieee802_11_elems
*elems
)
1020 struct ieee80211_local
*local
= sdata
->local
;
1021 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1022 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1023 struct ieee80211_bss
*bss
;
1024 struct ieee80211_chanctx
*chanctx
;
1025 enum ieee80211_band new_band
;
1030 struct ieee80211_channel
*new_chan
;
1031 struct cfg80211_chan_def new_chandef
= {};
1032 struct cfg80211_chan_def new_vht_chandef
= {};
1033 const struct ieee80211_sec_chan_offs_ie
*sec_chan_offs
;
1034 const struct ieee80211_wide_bw_chansw_ie
*wide_bw_chansw_ie
;
1035 int secondary_channel_offset
= -1;
1037 ASSERT_MGD_MTX(ifmgd
);
1042 if (local
->scanning
)
1045 /* disregard subsequent announcements if we are already processing */
1046 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
1049 sec_chan_offs
= elems
->sec_chan_offs
;
1050 wide_bw_chansw_ie
= elems
->wide_bw_chansw_ie
;
1052 if (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
1053 IEEE80211_STA_DISABLE_40MHZ
)) {
1054 sec_chan_offs
= NULL
;
1055 wide_bw_chansw_ie
= NULL
;
1058 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
1059 wide_bw_chansw_ie
= NULL
;
1061 if (elems
->ext_chansw_ie
) {
1062 if (!ieee80211_operating_class_to_band(
1063 elems
->ext_chansw_ie
->new_operating_class
,
1066 "cannot understand ECSA IE operating class %d, disconnecting\n",
1067 elems
->ext_chansw_ie
->new_operating_class
);
1068 ieee80211_queue_work(&local
->hw
,
1069 &ifmgd
->csa_connection_drop_work
);
1071 new_chan_no
= elems
->ext_chansw_ie
->new_ch_num
;
1072 count
= elems
->ext_chansw_ie
->count
;
1073 mode
= elems
->ext_chansw_ie
->mode
;
1074 } else if (elems
->ch_switch_ie
) {
1075 new_band
= cbss
->channel
->band
;
1076 new_chan_no
= elems
->ch_switch_ie
->new_ch_num
;
1077 count
= elems
->ch_switch_ie
->count
;
1078 mode
= elems
->ch_switch_ie
->mode
;
1080 /* nothing here we understand */
1084 bss
= (void *)cbss
->priv
;
1086 new_freq
= ieee80211_channel_to_frequency(new_chan_no
, new_band
);
1087 new_chan
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
1088 if (!new_chan
|| new_chan
->flags
& IEEE80211_CHAN_DISABLED
) {
1090 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1091 ifmgd
->associated
->bssid
, new_freq
);
1092 ieee80211_queue_work(&local
->hw
,
1093 &ifmgd
->csa_connection_drop_work
);
1097 if (sec_chan_offs
) {
1098 secondary_channel_offset
= sec_chan_offs
->sec_chan_offs
;
1099 } else if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
1100 /* if HT is enabled and the IE not present, it's still HT */
1101 secondary_channel_offset
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1104 switch (secondary_channel_offset
) {
1106 /* secondary_channel_offset was present but is invalid */
1107 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1108 cfg80211_chandef_create(&new_chandef
, new_chan
,
1111 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1112 cfg80211_chandef_create(&new_chandef
, new_chan
,
1113 NL80211_CHAN_HT40PLUS
);
1115 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1116 cfg80211_chandef_create(&new_chandef
, new_chan
,
1117 NL80211_CHAN_HT40MINUS
);
1120 cfg80211_chandef_create(&new_chandef
, new_chan
,
1121 NL80211_CHAN_NO_HT
);
1125 if (wide_bw_chansw_ie
) {
1126 new_vht_chandef
.chan
= new_chan
;
1127 new_vht_chandef
.center_freq1
=
1128 ieee80211_channel_to_frequency(
1129 wide_bw_chansw_ie
->new_center_freq_seg0
,
1132 switch (wide_bw_chansw_ie
->new_channel_width
) {
1134 /* hmmm, ignore VHT and use HT if present */
1135 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
1136 new_vht_chandef
.chan
= NULL
;
1138 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
1139 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
1141 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
1142 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
1144 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
1145 /* field is otherwise reserved */
1146 new_vht_chandef
.center_freq2
=
1147 ieee80211_channel_to_frequency(
1148 wide_bw_chansw_ie
->new_center_freq_seg1
,
1150 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
1153 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
1154 new_vht_chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
1155 chandef_downgrade(&new_vht_chandef
);
1156 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
1157 new_vht_chandef
.width
== NL80211_CHAN_WIDTH_160
)
1158 chandef_downgrade(&new_vht_chandef
);
1159 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
1160 new_vht_chandef
.width
> NL80211_CHAN_WIDTH_20
)
1161 chandef_downgrade(&new_vht_chandef
);
1164 /* if VHT data is there validate & use it */
1165 if (new_vht_chandef
.chan
) {
1166 if (!cfg80211_chandef_compatible(&new_vht_chandef
,
1169 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1170 ifmgd
->associated
->bssid
);
1171 ieee80211_queue_work(&local
->hw
,
1172 &ifmgd
->csa_connection_drop_work
);
1175 new_chandef
= new_vht_chandef
;
1178 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &new_chandef
,
1179 IEEE80211_CHAN_DISABLED
)) {
1181 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1182 ifmgd
->associated
->bssid
, new_freq
,
1183 new_chandef
.width
, new_chandef
.center_freq1
,
1184 new_chandef
.center_freq2
);
1185 ieee80211_queue_work(&local
->hw
,
1186 &ifmgd
->csa_connection_drop_work
);
1190 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
1192 if (local
->use_chanctx
) {
1194 "not handling channel switch with channel contexts\n");
1195 ieee80211_queue_work(&local
->hw
,
1196 &ifmgd
->csa_connection_drop_work
);
1200 mutex_lock(&local
->chanctx_mtx
);
1201 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
1202 mutex_unlock(&local
->chanctx_mtx
);
1205 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
1206 struct ieee80211_chanctx
, conf
);
1207 if (chanctx
->refcount
> 1) {
1209 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1210 ieee80211_queue_work(&local
->hw
,
1211 &ifmgd
->csa_connection_drop_work
);
1212 mutex_unlock(&local
->chanctx_mtx
);
1215 mutex_unlock(&local
->chanctx_mtx
);
1217 local
->csa_chandef
= new_chandef
;
1220 ieee80211_stop_queues_by_reason(&local
->hw
,
1221 IEEE80211_MAX_QUEUE_MAP
,
1222 IEEE80211_QUEUE_STOP_REASON_CSA
);
1224 if (local
->ops
->channel_switch
) {
1225 /* use driver's channel switch callback */
1226 struct ieee80211_channel_switch ch_switch
= {
1227 .timestamp
= timestamp
,
1229 .chandef
= new_chandef
,
1233 drv_channel_switch(local
, &ch_switch
);
1237 /* channel switch handled in software */
1239 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1241 mod_timer(&ifmgd
->chswitch_timer
,
1242 TU_TO_EXP_TIME(count
* cbss
->beacon_interval
));
1245 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1246 struct ieee80211_channel
*channel
,
1247 const u8
*country_ie
, u8 country_ie_len
,
1248 const u8
*pwr_constr_elem
)
1250 struct ieee80211_country_ie_triplet
*triplet
;
1251 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1252 int i
, chan_pwr
, chan_increment
, new_ap_level
;
1253 bool have_chan_pwr
= false;
1256 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1259 triplet
= (void *)(country_ie
+ 3);
1260 country_ie_len
-= 3;
1262 switch (channel
->band
) {
1266 case IEEE80211_BAND_2GHZ
:
1267 case IEEE80211_BAND_60GHZ
:
1270 case IEEE80211_BAND_5GHZ
:
1276 while (country_ie_len
>= 3) {
1277 u8 first_channel
= triplet
->chans
.first_channel
;
1279 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1282 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1283 if (first_channel
+ i
* chan_increment
== chan
) {
1284 have_chan_pwr
= true;
1285 chan_pwr
= triplet
->chans
.max_power
;
1294 country_ie_len
-= 3;
1300 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
1302 if (sdata
->ap_power_level
== new_ap_level
)
1306 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1307 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
1308 sdata
->u
.mgd
.bssid
);
1309 sdata
->ap_power_level
= new_ap_level
;
1310 if (__ieee80211_recalc_txpower(sdata
))
1311 return BSS_CHANGED_TXPOWER
;
1316 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1317 struct ieee80211_sub_if_data
*sdata
)
1319 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1322 * If we are scanning right now then the parameters will
1323 * take effect when scan finishes.
1325 if (local
->scanning
)
1328 if (conf
->dynamic_ps_timeout
> 0 &&
1329 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1330 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1331 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1333 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1334 ieee80211_send_nullfunc(local
, sdata
, 1);
1336 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1337 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1340 conf
->flags
|= IEEE80211_CONF_PS
;
1341 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1345 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1347 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1349 if (local
->ps_sdata
) {
1350 ieee80211_enable_ps(local
, local
->ps_sdata
);
1351 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1352 conf
->flags
&= ~IEEE80211_CONF_PS
;
1353 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1354 del_timer_sync(&local
->dynamic_ps_timer
);
1355 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1359 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1361 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1362 struct sta_info
*sta
= NULL
;
1363 bool authorized
= false;
1365 if (!mgd
->powersave
)
1371 if (!mgd
->associated
)
1374 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1375 IEEE80211_STA_CONNECTION_POLL
))
1379 sta
= sta_info_get(sdata
, mgd
->bssid
);
1381 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1387 /* need to hold RTNL or interface lock */
1388 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1390 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1394 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1395 local
->ps_sdata
= NULL
;
1399 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1400 if (!ieee80211_sdata_running(sdata
))
1402 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1403 /* If an AP vif is found, then disable PS
1404 * by setting the count to zero thereby setting
1410 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1416 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1420 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1422 beaconint_us
= ieee80211_tu_to_usec(
1423 found
->vif
.bss_conf
.beacon_int
);
1425 timeout
= local
->dynamic_ps_forced_timeout
;
1428 * Go to full PSM if the user configures a very low
1429 * latency requirement.
1430 * The 2000 second value is there for compatibility
1431 * until the PM_QOS_NETWORK_LATENCY is configured
1434 if (latency
> (1900 * USEC_PER_MSEC
) &&
1435 latency
!= (2000 * USEC_PER_SEC
))
1440 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1442 if (beaconint_us
> latency
) {
1443 local
->ps_sdata
= NULL
;
1446 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1448 /* If the TIM IE is invalid, pretend the value is 1 */
1451 else if (dtimper
> 1)
1452 maxslp
= min_t(int, dtimper
,
1453 latency
/ beaconint_us
);
1455 local
->hw
.conf
.max_sleep_period
= maxslp
;
1456 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1457 local
->ps_sdata
= found
;
1460 local
->ps_sdata
= NULL
;
1463 ieee80211_change_ps(local
);
1466 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1468 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1470 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1471 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1472 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1476 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1478 struct ieee80211_local
*local
=
1479 container_of(work
, struct ieee80211_local
,
1480 dynamic_ps_disable_work
);
1482 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1483 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1484 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1487 ieee80211_wake_queues_by_reason(&local
->hw
,
1488 IEEE80211_MAX_QUEUE_MAP
,
1489 IEEE80211_QUEUE_STOP_REASON_PS
);
1492 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1494 struct ieee80211_local
*local
=
1495 container_of(work
, struct ieee80211_local
,
1496 dynamic_ps_enable_work
);
1497 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1498 struct ieee80211_if_managed
*ifmgd
;
1499 unsigned long flags
;
1502 /* can only happen when PS was just disabled anyway */
1506 ifmgd
= &sdata
->u
.mgd
;
1508 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1511 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1512 /* don't enter PS if TX frames are pending */
1513 if (drv_tx_frames_pending(local
)) {
1514 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1516 local
->hw
.conf
.dynamic_ps_timeout
));
1521 * transmission can be stopped by others which leads to
1522 * dynamic_ps_timer expiry. Postpone the ps timer if it
1523 * is not the actual idle state.
1525 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1526 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1527 if (local
->queue_stop_reasons
[q
]) {
1528 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1530 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1532 local
->hw
.conf
.dynamic_ps_timeout
));
1536 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1539 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1540 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1541 if (drv_tx_frames_pending(local
)) {
1542 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1544 local
->hw
.conf
.dynamic_ps_timeout
));
1546 ieee80211_send_nullfunc(local
, sdata
, 1);
1547 /* Flush to get the tx status of nullfunc frame */
1548 ieee80211_flush_queues(local
, sdata
);
1552 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1553 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1554 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1555 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1556 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1557 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1561 void ieee80211_dynamic_ps_timer(unsigned long data
)
1563 struct ieee80211_local
*local
= (void *) data
;
1565 if (local
->quiescing
|| local
->suspended
)
1568 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1571 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1573 struct delayed_work
*delayed_work
=
1574 container_of(work
, struct delayed_work
, work
);
1575 struct ieee80211_sub_if_data
*sdata
=
1576 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1577 dfs_cac_timer_work
);
1579 ieee80211_vif_release_channel(sdata
);
1581 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_FINISHED
, GFP_KERNEL
);
1585 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1586 struct ieee80211_sub_if_data
*sdata
,
1587 const u8
*wmm_param
, size_t wmm_param_len
)
1589 struct ieee80211_tx_queue_params params
;
1590 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1594 u8 uapsd_queues
= 0;
1596 if (!local
->ops
->conf_tx
)
1599 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1605 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1608 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1609 uapsd_queues
= ifmgd
->uapsd_queues
;
1611 count
= wmm_param
[6] & 0x0f;
1612 if (count
== ifmgd
->wmm_last_param_set
)
1614 ifmgd
->wmm_last_param_set
= count
;
1616 pos
= wmm_param
+ 8;
1617 left
= wmm_param_len
- 8;
1619 memset(¶ms
, 0, sizeof(params
));
1622 for (; left
>= 4; left
-= 4, pos
+= 4) {
1623 int aci
= (pos
[0] >> 5) & 0x03;
1624 int acm
= (pos
[0] >> 4) & 0x01;
1632 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1633 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1639 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1640 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1646 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1647 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1654 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1655 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1660 params
.aifs
= pos
[0] & 0x0f;
1661 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1662 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1663 params
.txop
= get_unaligned_le16(pos
+ 2);
1665 params
.uapsd
= uapsd
;
1668 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1670 params
.aifs
, params
.cw_min
, params
.cw_max
,
1671 params
.txop
, params
.uapsd
);
1672 sdata
->tx_conf
[queue
] = params
;
1673 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1675 "failed to set TX queue parameters for queue %d\n",
1679 /* enable WMM or activate new settings */
1680 sdata
->vif
.bss_conf
.qos
= true;
1684 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1686 lockdep_assert_held(&sdata
->local
->mtx
);
1688 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1689 IEEE80211_STA_BEACON_POLL
);
1690 ieee80211_run_deferred_scan(sdata
->local
);
1693 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1695 mutex_lock(&sdata
->local
->mtx
);
1696 __ieee80211_stop_poll(sdata
);
1697 mutex_unlock(&sdata
->local
->mtx
);
1700 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1701 u16 capab
, bool erp_valid
, u8 erp
)
1703 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1705 bool use_protection
;
1706 bool use_short_preamble
;
1707 bool use_short_slot
;
1710 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1711 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1713 use_protection
= false;
1714 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1717 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1718 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1719 use_short_slot
= true;
1721 if (use_protection
!= bss_conf
->use_cts_prot
) {
1722 bss_conf
->use_cts_prot
= use_protection
;
1723 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1726 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1727 bss_conf
->use_short_preamble
= use_short_preamble
;
1728 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1731 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1732 bss_conf
->use_short_slot
= use_short_slot
;
1733 changed
|= BSS_CHANGED_ERP_SLOT
;
1739 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1740 struct cfg80211_bss
*cbss
,
1741 u32 bss_info_changed
)
1743 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1744 struct ieee80211_local
*local
= sdata
->local
;
1745 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1747 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1748 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1749 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1751 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1752 beacon_loss_count
* bss_conf
->beacon_int
));
1754 sdata
->u
.mgd
.associated
= cbss
;
1755 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1757 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1759 if (sdata
->vif
.p2p
) {
1760 const struct cfg80211_bss_ies
*ies
;
1763 ies
= rcu_dereference(cbss
->ies
);
1767 ret
= cfg80211_get_p2p_attr(
1768 ies
->data
, ies
->len
,
1769 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1770 (u8
*) &bss_conf
->p2p_noa_attr
,
1771 sizeof(bss_conf
->p2p_noa_attr
));
1773 sdata
->u
.mgd
.p2p_noa_index
=
1774 bss_conf
->p2p_noa_attr
.index
;
1775 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1781 /* just to be sure */
1782 ieee80211_stop_poll(sdata
);
1784 ieee80211_led_assoc(local
, 1);
1786 if (sdata
->u
.mgd
.assoc_data
->have_beacon
) {
1788 * If the AP is buggy we may get here with no DTIM period
1789 * known, so assume it's 1 which is the only safe assumption
1790 * in that case, although if the TIM IE is broken powersave
1791 * probably just won't work at all.
1793 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1794 bss_info_changed
|= BSS_CHANGED_DTIM_PERIOD
;
1796 bss_conf
->dtim_period
= 0;
1799 bss_conf
->assoc
= 1;
1801 /* Tell the driver to monitor connection quality (if supported) */
1802 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1803 bss_conf
->cqm_rssi_thold
)
1804 bss_info_changed
|= BSS_CHANGED_CQM
;
1806 /* Enable ARP filtering */
1807 if (bss_conf
->arp_addr_cnt
)
1808 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1810 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1812 mutex_lock(&local
->iflist_mtx
);
1813 ieee80211_recalc_ps(local
, -1);
1814 mutex_unlock(&local
->iflist_mtx
);
1816 ieee80211_recalc_smps(sdata
);
1817 ieee80211_recalc_ps_vif(sdata
);
1819 netif_carrier_on(sdata
->dev
);
1822 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1823 u16 stype
, u16 reason
, bool tx
,
1826 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1827 struct ieee80211_local
*local
= sdata
->local
;
1830 ASSERT_MGD_MTX(ifmgd
);
1832 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1835 if (WARN_ON(!ifmgd
->associated
))
1838 ieee80211_stop_poll(sdata
);
1840 ifmgd
->associated
= NULL
;
1841 netif_carrier_off(sdata
->dev
);
1844 * if we want to get out of ps before disassoc (why?) we have
1845 * to do it before sending disassoc, as otherwise the null-packet
1848 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1849 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1850 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1852 local
->ps_sdata
= NULL
;
1854 /* disable per-vif ps */
1855 ieee80211_recalc_ps_vif(sdata
);
1857 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1859 ieee80211_flush_queues(local
, sdata
);
1861 /* deauthenticate/disassociate now */
1862 if (tx
|| frame_buf
)
1863 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1864 reason
, tx
, frame_buf
);
1866 /* flush out frame */
1868 ieee80211_flush_queues(local
, sdata
);
1870 /* clear bssid only after building the needed mgmt frames */
1871 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1873 /* remove AP and TDLS peers */
1874 sta_info_flush_defer(sdata
);
1876 /* finally reset all BSS / config parameters */
1877 changed
|= ieee80211_reset_erp_info(sdata
);
1879 ieee80211_led_assoc(local
, 0);
1880 changed
|= BSS_CHANGED_ASSOC
;
1881 sdata
->vif
.bss_conf
.assoc
= false;
1883 ifmgd
->p2p_noa_index
= -1;
1884 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
1885 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
1887 /* on the next assoc, re-program HT/VHT parameters */
1888 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1889 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1890 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
1891 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
1893 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1895 del_timer_sync(&local
->dynamic_ps_timer
);
1896 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1898 /* Disable ARP filtering */
1899 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1900 changed
|= BSS_CHANGED_ARP_FILTER
;
1902 sdata
->vif
.bss_conf
.qos
= false;
1903 changed
|= BSS_CHANGED_QOS
;
1905 /* The BSSID (not really interesting) and HT changed */
1906 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1907 ieee80211_bss_info_change_notify(sdata
, changed
);
1909 /* disassociated - set to defaults now */
1910 ieee80211_set_wmm_default(sdata
, false);
1912 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1913 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1914 del_timer_sync(&sdata
->u
.mgd
.timer
);
1915 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1917 sdata
->vif
.bss_conf
.dtim_period
= 0;
1920 ieee80211_vif_release_channel(sdata
);
1923 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1924 struct ieee80211_hdr
*hdr
)
1927 * We can postpone the mgd.timer whenever receiving unicast frames
1928 * from AP because we know that the connection is working both ways
1929 * at that time. But multicast frames (and hence also beacons) must
1930 * be ignored here, because we need to trigger the timer during
1931 * data idle periods for sending the periodic probe request to the
1932 * AP we're connected to.
1934 if (is_multicast_ether_addr(hdr
->addr1
))
1937 ieee80211_sta_reset_conn_monitor(sdata
);
1940 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1942 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1943 struct ieee80211_local
*local
= sdata
->local
;
1945 mutex_lock(&local
->mtx
);
1946 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1947 IEEE80211_STA_CONNECTION_POLL
))) {
1948 mutex_unlock(&local
->mtx
);
1952 __ieee80211_stop_poll(sdata
);
1954 mutex_lock(&local
->iflist_mtx
);
1955 ieee80211_recalc_ps(local
, -1);
1956 mutex_unlock(&local
->iflist_mtx
);
1958 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1962 * We've received a probe response, but are not sure whether
1963 * we have or will be receiving any beacons or data, so let's
1964 * schedule the timers again, just in case.
1966 ieee80211_sta_reset_beacon_monitor(sdata
);
1968 mod_timer(&ifmgd
->conn_mon_timer
,
1969 round_jiffies_up(jiffies
+
1970 IEEE80211_CONNECTION_IDLE_TIME
));
1972 mutex_unlock(&local
->mtx
);
1975 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1976 struct ieee80211_hdr
*hdr
, bool ack
)
1978 if (!ieee80211_is_data(hdr
->frame_control
))
1981 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1982 sdata
->u
.mgd
.probe_send_count
> 0) {
1984 ieee80211_sta_reset_conn_monitor(sdata
);
1986 sdata
->u
.mgd
.nullfunc_failed
= true;
1987 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1992 ieee80211_sta_reset_conn_monitor(sdata
);
1995 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1997 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1999 u8
*dst
= ifmgd
->associated
->bssid
;
2000 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2003 * Try sending broadcast probe requests for the last three
2004 * probe requests after the first ones failed since some
2005 * buggy APs only support broadcast probe requests.
2007 if (ifmgd
->probe_send_count
>= unicast_limit
)
2011 * When the hardware reports an accurate Tx ACK status, it's
2012 * better to send a nullfunc frame instead of a probe request,
2013 * as it will kick us off the AP quickly if we aren't associated
2014 * anymore. The timeout will be reset if the frame is ACKed by
2017 ifmgd
->probe_send_count
++;
2019 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2020 ifmgd
->nullfunc_failed
= false;
2021 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
2026 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2027 if (WARN_ON_ONCE(ssid
== NULL
))
2032 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
2033 0, (u32
) -1, true, 0,
2034 ifmgd
->associated
->channel
, false);
2038 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2039 run_again(ifmgd
, ifmgd
->probe_timeout
);
2040 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2041 ieee80211_flush_queues(sdata
->local
, sdata
);
2044 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2047 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2048 bool already
= false;
2050 if (!ieee80211_sdata_running(sdata
))
2053 mutex_lock(&ifmgd
->mtx
);
2055 if (!ifmgd
->associated
)
2058 mutex_lock(&sdata
->local
->mtx
);
2060 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2061 mutex_unlock(&sdata
->local
->mtx
);
2066 mlme_dbg_ratelimited(sdata
,
2067 "detected beacon loss from AP (missed %d beacons) - probing\n",
2070 ieee80211_cqm_rssi_notify(&sdata
->vif
,
2071 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
,
2076 * The driver/our work has already reported this event or the
2077 * connection monitoring has kicked in and we have already sent
2078 * a probe request. Or maybe the AP died and the driver keeps
2079 * reporting until we disassociate...
2081 * In either case we have to ignore the current call to this
2082 * function (except for setting the correct probe reason bit)
2083 * because otherwise we would reset the timer every time and
2084 * never check whether we received a probe response!
2086 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2087 IEEE80211_STA_CONNECTION_POLL
))
2091 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
2093 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2095 mutex_unlock(&sdata
->local
->mtx
);
2100 mutex_lock(&sdata
->local
->iflist_mtx
);
2101 ieee80211_recalc_ps(sdata
->local
, -1);
2102 mutex_unlock(&sdata
->local
->iflist_mtx
);
2104 ifmgd
->probe_send_count
= 0;
2105 ieee80211_mgd_probe_ap_send(sdata
);
2107 mutex_unlock(&ifmgd
->mtx
);
2110 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2111 struct ieee80211_vif
*vif
)
2113 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2114 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2115 struct cfg80211_bss
*cbss
;
2116 struct sk_buff
*skb
;
2120 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2123 ASSERT_MGD_MTX(ifmgd
);
2125 if (ifmgd
->associated
)
2126 cbss
= ifmgd
->associated
;
2127 else if (ifmgd
->auth_data
)
2128 cbss
= ifmgd
->auth_data
->bss
;
2129 else if (ifmgd
->assoc_data
)
2130 cbss
= ifmgd
->assoc_data
->bss
;
2135 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2136 if (WARN_ON_ONCE(ssid
== NULL
))
2141 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
2142 (u32
) -1, cbss
->channel
,
2149 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2151 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2153 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2154 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2156 mutex_lock(&ifmgd
->mtx
);
2157 if (!ifmgd
->associated
) {
2158 mutex_unlock(&ifmgd
->mtx
);
2162 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2163 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2165 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
2166 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
2167 IEEE80211_MAX_QUEUE_MAP
,
2168 IEEE80211_QUEUE_STOP_REASON_CSA
);
2169 mutex_unlock(&ifmgd
->mtx
);
2172 * must be outside lock due to cfg80211,
2173 * but that's not a problem.
2175 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
2178 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2180 struct ieee80211_sub_if_data
*sdata
=
2181 container_of(work
, struct ieee80211_sub_if_data
,
2182 u
.mgd
.beacon_connection_loss_work
);
2183 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2184 struct sta_info
*sta
;
2186 if (ifmgd
->associated
) {
2188 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2190 sta
->beacon_loss_count
++;
2194 if (ifmgd
->connection_loss
) {
2195 sdata_info(sdata
, "Connection to AP %pM lost\n",
2197 __ieee80211_disconnect(sdata
);
2199 ieee80211_mgd_probe_ap(sdata
, true);
2203 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2205 struct ieee80211_sub_if_data
*sdata
=
2206 container_of(work
, struct ieee80211_sub_if_data
,
2207 u
.mgd
.csa_connection_drop_work
);
2209 __ieee80211_disconnect(sdata
);
2212 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2214 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2215 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2217 trace_api_beacon_loss(sdata
);
2219 sdata
->u
.mgd
.connection_loss
= false;
2220 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2222 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2224 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2226 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2227 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2229 trace_api_connection_loss(sdata
);
2231 sdata
->u
.mgd
.connection_loss
= true;
2232 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2234 EXPORT_SYMBOL(ieee80211_connection_loss
);
2237 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2240 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2242 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2245 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2247 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2248 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2249 sdata
->u
.mgd
.flags
= 0;
2250 ieee80211_vif_release_channel(sdata
);
2253 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2255 sdata
->u
.mgd
.auth_data
= NULL
;
2258 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2259 struct ieee80211_mgmt
*mgmt
, size_t len
)
2261 struct ieee80211_local
*local
= sdata
->local
;
2262 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2264 struct ieee802_11_elems elems
;
2267 pos
= mgmt
->u
.auth
.variable
;
2268 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2269 if (!elems
.challenge
)
2271 auth_data
->expected_transaction
= 4;
2272 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2273 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2274 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2275 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2276 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2277 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2278 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2279 auth_data
->key
, auth_data
->key_len
,
2280 auth_data
->key_idx
, tx_flags
);
2283 static enum rx_mgmt_action __must_check
2284 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2285 struct ieee80211_mgmt
*mgmt
, size_t len
)
2287 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2289 u16 auth_alg
, auth_transaction
, status_code
;
2290 struct sta_info
*sta
;
2292 lockdep_assert_held(&ifmgd
->mtx
);
2295 return RX_MGMT_NONE
;
2297 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2298 return RX_MGMT_NONE
;
2300 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2302 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2303 return RX_MGMT_NONE
;
2305 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2306 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2307 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2309 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2310 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2311 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2312 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2314 ifmgd
->auth_data
->expected_transaction
);
2315 return RX_MGMT_NONE
;
2318 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2319 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2320 mgmt
->sa
, status_code
);
2321 ieee80211_destroy_auth_data(sdata
, false);
2322 return RX_MGMT_CFG80211_RX_AUTH
;
2325 switch (ifmgd
->auth_data
->algorithm
) {
2326 case WLAN_AUTH_OPEN
:
2327 case WLAN_AUTH_LEAP
:
2331 case WLAN_AUTH_SHARED_KEY
:
2332 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2333 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2334 /* need another frame */
2335 return RX_MGMT_NONE
;
2339 WARN_ONCE(1, "invalid auth alg %d",
2340 ifmgd
->auth_data
->algorithm
);
2341 return RX_MGMT_NONE
;
2344 sdata_info(sdata
, "authenticated\n");
2345 ifmgd
->auth_data
->done
= true;
2346 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2347 ifmgd
->auth_data
->timeout_started
= true;
2348 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2350 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2351 ifmgd
->auth_data
->expected_transaction
!= 2) {
2353 * Report auth frame to user space for processing since another
2354 * round of Authentication frames is still needed.
2356 return RX_MGMT_CFG80211_RX_AUTH
;
2359 /* move station state to auth */
2360 mutex_lock(&sdata
->local
->sta_mtx
);
2361 sta
= sta_info_get(sdata
, bssid
);
2363 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2366 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2367 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2370 mutex_unlock(&sdata
->local
->sta_mtx
);
2372 return RX_MGMT_CFG80211_RX_AUTH
;
2374 mutex_unlock(&sdata
->local
->sta_mtx
);
2375 /* ignore frame -- wait for timeout */
2376 return RX_MGMT_NONE
;
2380 static enum rx_mgmt_action __must_check
2381 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2382 struct ieee80211_mgmt
*mgmt
, size_t len
)
2384 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2385 const u8
*bssid
= NULL
;
2388 lockdep_assert_held(&ifmgd
->mtx
);
2391 return RX_MGMT_NONE
;
2393 if (!ifmgd
->associated
||
2394 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2395 return RX_MGMT_NONE
;
2397 bssid
= ifmgd
->associated
->bssid
;
2399 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2401 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2402 bssid
, reason_code
);
2404 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2406 return RX_MGMT_CFG80211_DEAUTH
;
2410 static enum rx_mgmt_action __must_check
2411 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2412 struct ieee80211_mgmt
*mgmt
, size_t len
)
2414 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2417 lockdep_assert_held(&ifmgd
->mtx
);
2420 return RX_MGMT_NONE
;
2422 if (!ifmgd
->associated
||
2423 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2424 return RX_MGMT_NONE
;
2426 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2428 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2429 mgmt
->sa
, reason_code
);
2431 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2433 return RX_MGMT_CFG80211_DISASSOC
;
2436 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2437 u8
*supp_rates
, unsigned int supp_rates_len
,
2438 u32
*rates
, u32
*basic_rates
,
2439 bool *have_higher_than_11mbit
,
2440 int *min_rate
, int *min_rate_index
)
2444 for (i
= 0; i
< supp_rates_len
; i
++) {
2445 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2446 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2449 *have_higher_than_11mbit
= true;
2452 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2453 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2455 * Note: Even through the membership selector and the basic
2456 * rate flag share the same bit, they are not exactly
2459 if (!!(supp_rates
[i
] & 0x80) &&
2460 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2463 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2464 if (sband
->bitrates
[j
].bitrate
== rate
) {
2467 *basic_rates
|= BIT(j
);
2468 if (rate
< *min_rate
) {
2470 *min_rate_index
= j
;
2478 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2481 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2483 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2486 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2488 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2489 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2490 sdata
->u
.mgd
.flags
= 0;
2491 ieee80211_vif_release_channel(sdata
);
2495 sdata
->u
.mgd
.assoc_data
= NULL
;
2498 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2499 struct cfg80211_bss
*cbss
,
2500 struct ieee80211_mgmt
*mgmt
, size_t len
)
2502 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2503 struct ieee80211_local
*local
= sdata
->local
;
2504 struct ieee80211_supported_band
*sband
;
2505 struct sta_info
*sta
;
2507 u16 capab_info
, aid
;
2508 struct ieee802_11_elems elems
;
2509 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2513 /* AssocResp and ReassocResp have identical structure */
2515 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2516 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2518 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2519 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2521 aid
&= ~(BIT(15) | BIT(14));
2523 ifmgd
->broken_ap
= false;
2525 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2526 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2529 ifmgd
->broken_ap
= true;
2532 pos
= mgmt
->u
.assoc_resp
.variable
;
2533 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2535 if (!elems
.supp_rates
) {
2536 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2543 * We previously checked these in the beacon/probe response, so
2544 * they should be present here. This is just a safety net.
2546 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2547 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2549 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2553 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2554 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2556 "VHT AP is missing VHT capability/operation in AssocResp\n");
2560 mutex_lock(&sdata
->local
->sta_mtx
);
2562 * station info was already allocated and inserted before
2563 * the association and should be available to us
2565 sta
= sta_info_get(sdata
, cbss
->bssid
);
2566 if (WARN_ON(!sta
)) {
2567 mutex_unlock(&sdata
->local
->sta_mtx
);
2571 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2573 /* Set up internal HT/VHT capabilities */
2574 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2575 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2576 elems
.ht_cap_elem
, sta
);
2578 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2579 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2580 elems
.vht_cap_elem
, sta
);
2583 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2584 * in their association response, so ignore that data for our own
2585 * configuration. If it changed since the last beacon, we'll get the
2586 * next beacon and update then.
2590 * If an operating mode notification IE is present, override the
2591 * NSS calculation (that would be done in rate_control_rate_init())
2592 * and use the # of streams from that element.
2594 if (elems
.opmode_notif
&&
2595 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2598 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2599 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2601 sta
->sta
.rx_nss
= nss
;
2604 rate_control_rate_init(sta
);
2606 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2607 set_sta_flag(sta
, WLAN_STA_MFP
);
2609 if (elems
.wmm_param
)
2610 set_sta_flag(sta
, WLAN_STA_WME
);
2612 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2613 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2614 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2617 "failed to move station %pM to desired state\n",
2619 WARN_ON(__sta_info_destroy(sta
));
2620 mutex_unlock(&sdata
->local
->sta_mtx
);
2624 mutex_unlock(&sdata
->local
->sta_mtx
);
2627 * Always handle WMM once after association regardless
2628 * of the first value the AP uses. Setting -1 here has
2629 * that effect because the AP values is an unsigned
2632 ifmgd
->wmm_last_param_set
= -1;
2634 if (elems
.wmm_param
)
2635 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2636 elems
.wmm_param_len
);
2638 ieee80211_set_wmm_default(sdata
, false);
2639 changed
|= BSS_CHANGED_QOS
;
2641 /* set AID and assoc capability,
2642 * ieee80211_set_associated() will tell the driver */
2643 bss_conf
->aid
= aid
;
2644 bss_conf
->assoc_capability
= capab_info
;
2645 ieee80211_set_associated(sdata
, cbss
, changed
);
2648 * If we're using 4-addr mode, let the AP know that we're
2649 * doing so, so that it can create the STA VLAN on its side
2651 if (ifmgd
->use_4addr
)
2652 ieee80211_send_4addr_nullfunc(local
, sdata
);
2655 * Start timer to probe the connection to the AP now.
2656 * Also start the timer that will detect beacon loss.
2658 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2659 ieee80211_sta_reset_beacon_monitor(sdata
);
2664 static enum rx_mgmt_action __must_check
2665 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2666 struct ieee80211_mgmt
*mgmt
, size_t len
,
2667 struct cfg80211_bss
**bss
)
2669 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2670 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2671 u16 capab_info
, status_code
, aid
;
2672 struct ieee802_11_elems elems
;
2676 lockdep_assert_held(&ifmgd
->mtx
);
2679 return RX_MGMT_NONE
;
2680 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2681 return RX_MGMT_NONE
;
2684 * AssocResp and ReassocResp have identical structure, so process both
2685 * of them in this function.
2689 return RX_MGMT_NONE
;
2691 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2692 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2693 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2694 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2697 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2698 reassoc
? "Rea" : "A", mgmt
->sa
,
2699 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2701 pos
= mgmt
->u
.assoc_resp
.variable
;
2702 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2704 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2705 elems
.timeout_int
&&
2706 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2708 tu
= le32_to_cpu(elems
.timeout_int
->value
);
2709 ms
= tu
* 1024 / 1000;
2711 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2713 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2714 assoc_data
->timeout_started
= true;
2715 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2716 run_again(ifmgd
, assoc_data
->timeout
);
2717 return RX_MGMT_NONE
;
2720 *bss
= assoc_data
->bss
;
2722 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2723 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2724 mgmt
->sa
, status_code
);
2725 ieee80211_destroy_assoc_data(sdata
, false);
2727 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2728 /* oops -- internal error -- send timeout for now */
2729 ieee80211_destroy_assoc_data(sdata
, false);
2730 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, *bss
);
2731 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2733 sdata_info(sdata
, "associated\n");
2736 * destroy assoc_data afterwards, as otherwise an idle
2737 * recalc after assoc_data is NULL but before associated
2738 * is set can cause the interface to go idle
2740 ieee80211_destroy_assoc_data(sdata
, true);
2743 return RX_MGMT_CFG80211_RX_ASSOC
;
2746 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2747 struct ieee80211_mgmt
*mgmt
, size_t len
,
2748 struct ieee80211_rx_status
*rx_status
,
2749 struct ieee802_11_elems
*elems
)
2751 struct ieee80211_local
*local
= sdata
->local
;
2753 struct ieee80211_bss
*bss
;
2754 struct ieee80211_channel
*channel
;
2755 bool need_ps
= false;
2757 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2759 if ((sdata
->u
.mgd
.associated
&&
2760 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) ||
2761 (sdata
->u
.mgd
.assoc_data
&&
2762 ether_addr_equal(mgmt
->bssid
,
2763 sdata
->u
.mgd
.assoc_data
->bss
->bssid
))) {
2764 /* not previously set so we may need to recalc */
2765 need_ps
= sdata
->u
.mgd
.associated
&& !sdata
->u
.mgd
.dtim_period
;
2767 if (elems
->tim
&& !elems
->parse_error
) {
2768 const struct ieee80211_tim_ie
*tim_ie
= elems
->tim
;
2769 sdata
->u
.mgd
.dtim_period
= tim_ie
->dtim_period
;
2773 if (elems
->ds_params
)
2774 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2777 freq
= rx_status
->freq
;
2779 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2781 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2784 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2787 ieee80211_rx_bss_put(local
, bss
);
2789 if (!sdata
->u
.mgd
.associated
||
2790 !ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
))
2794 mutex_lock(&local
->iflist_mtx
);
2795 ieee80211_recalc_ps(local
, -1);
2796 mutex_unlock(&local
->iflist_mtx
);
2799 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
, elems
);
2804 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2805 struct sk_buff
*skb
)
2807 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2808 struct ieee80211_if_managed
*ifmgd
;
2809 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2810 size_t baselen
, len
= skb
->len
;
2811 struct ieee802_11_elems elems
;
2813 ifmgd
= &sdata
->u
.mgd
;
2815 ASSERT_MGD_MTX(ifmgd
);
2817 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2818 return; /* ignore ProbeResp to foreign address */
2820 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2824 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2827 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2829 if (ifmgd
->associated
&&
2830 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2831 ieee80211_reset_ap_probe(sdata
);
2833 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2834 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2835 /* got probe response, continue with auth */
2836 sdata_info(sdata
, "direct probe responded\n");
2837 ifmgd
->auth_data
->tries
= 0;
2838 ifmgd
->auth_data
->timeout
= jiffies
;
2839 ifmgd
->auth_data
->timeout_started
= true;
2840 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2845 * This is the canonical list of information elements we care about,
2846 * the filter code also gives us all changes to the Microsoft OUI
2847 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2849 * We implement beacon filtering in software since that means we can
2850 * avoid processing the frame here and in cfg80211, and userspace
2851 * will not be able to tell whether the hardware supports it or not.
2853 * XXX: This list needs to be dynamic -- userspace needs to be able to
2854 * add items it requires. It also needs to be able to tell us to
2855 * look out for other vendor IEs.
2857 static const u64 care_about_ies
=
2858 (1ULL << WLAN_EID_COUNTRY
) |
2859 (1ULL << WLAN_EID_ERP_INFO
) |
2860 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2861 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2862 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2863 (1ULL << WLAN_EID_HT_OPERATION
);
2865 static enum rx_mgmt_action
2866 ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2867 struct ieee80211_mgmt
*mgmt
, size_t len
,
2868 u8
*deauth_buf
, struct ieee80211_rx_status
*rx_status
)
2870 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2871 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2873 struct ieee802_11_elems elems
;
2874 struct ieee80211_local
*local
= sdata
->local
;
2875 struct ieee80211_chanctx_conf
*chanctx_conf
;
2876 struct ieee80211_channel
*chan
;
2877 struct sta_info
*sta
;
2884 lockdep_assert_held(&ifmgd
->mtx
);
2886 /* Process beacon from the current BSS */
2887 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2889 return RX_MGMT_NONE
;
2892 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2893 if (!chanctx_conf
) {
2895 return RX_MGMT_NONE
;
2898 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2900 return RX_MGMT_NONE
;
2902 chan
= chanctx_conf
->def
.chan
;
2905 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
2906 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2907 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2908 len
- baselen
, false, &elems
);
2910 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2911 ifmgd
->assoc_data
->have_beacon
= true;
2912 ifmgd
->assoc_data
->need_beacon
= false;
2913 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
2914 sdata
->vif
.bss_conf
.sync_tsf
=
2915 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2916 sdata
->vif
.bss_conf
.sync_device_ts
=
2917 rx_status
->device_timestamp
;
2919 sdata
->vif
.bss_conf
.sync_dtim_count
=
2920 elems
.tim
->dtim_count
;
2922 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
2924 /* continue assoc process */
2925 ifmgd
->assoc_data
->timeout
= jiffies
;
2926 ifmgd
->assoc_data
->timeout_started
= true;
2927 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2928 return RX_MGMT_NONE
;
2931 if (!ifmgd
->associated
||
2932 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2933 return RX_MGMT_NONE
;
2934 bssid
= ifmgd
->associated
->bssid
;
2936 /* Track average RSSI from the Beacon frames of the current AP */
2937 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2938 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2939 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2940 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2941 ifmgd
->last_cqm_event_signal
= 0;
2942 ifmgd
->count_beacon_signal
= 1;
2943 ifmgd
->last_ave_beacon_signal
= 0;
2945 ifmgd
->ave_beacon_signal
=
2946 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2947 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2948 ifmgd
->ave_beacon_signal
) / 16;
2949 ifmgd
->count_beacon_signal
++;
2952 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2953 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2954 int sig
= ifmgd
->ave_beacon_signal
;
2955 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2958 * if signal crosses either of the boundaries, invoke callback
2959 * with appropriate parameters
2961 if (sig
> ifmgd
->rssi_max_thold
&&
2962 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2963 ifmgd
->last_ave_beacon_signal
= sig
;
2964 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
2965 } else if (sig
< ifmgd
->rssi_min_thold
&&
2966 (last_sig
>= ifmgd
->rssi_max_thold
||
2968 ifmgd
->last_ave_beacon_signal
= sig
;
2969 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
2973 if (bss_conf
->cqm_rssi_thold
&&
2974 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2975 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2976 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2977 int last_event
= ifmgd
->last_cqm_event_signal
;
2978 int thold
= bss_conf
->cqm_rssi_thold
;
2979 int hyst
= bss_conf
->cqm_rssi_hyst
;
2981 (last_event
== 0 || sig
< last_event
- hyst
)) {
2982 ifmgd
->last_cqm_event_signal
= sig
;
2983 ieee80211_cqm_rssi_notify(
2985 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2987 } else if (sig
> thold
&&
2988 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2989 ifmgd
->last_cqm_event_signal
= sig
;
2990 ieee80211_cqm_rssi_notify(
2992 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2997 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2998 mlme_dbg_ratelimited(sdata
,
2999 "cancelling AP probe due to a received beacon\n");
3000 mutex_lock(&local
->mtx
);
3001 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
3002 ieee80211_run_deferred_scan(local
);
3003 mutex_unlock(&local
->mtx
);
3005 mutex_lock(&local
->iflist_mtx
);
3006 ieee80211_recalc_ps(local
, -1);
3007 mutex_unlock(&local
->iflist_mtx
);
3011 * Push the beacon loss detection into the future since
3012 * we are processing a beacon from the AP just now.
3014 ieee80211_sta_reset_beacon_monitor(sdata
);
3016 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3017 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3018 len
- baselen
, false, &elems
,
3019 care_about_ies
, ncrc
);
3021 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
3022 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
3026 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3027 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3028 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3029 ieee80211_hw_config(local
,
3030 IEEE80211_CONF_CHANGE_PS
);
3032 ieee80211_send_nullfunc(local
, sdata
, 0);
3033 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3034 local
->pspolling
= true;
3037 * Here is assumed that the driver will be
3038 * able to send ps-poll frame and receive a
3039 * response even though power save mode is
3040 * enabled, but some drivers might require
3041 * to disable power save here. This needs
3042 * to be investigated.
3044 ieee80211_send_pspoll(local
, sdata
);
3049 if (sdata
->vif
.p2p
) {
3050 struct ieee80211_p2p_noa_attr noa
= {};
3053 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3055 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3056 (u8
*) &noa
, sizeof(noa
));
3058 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3059 /* valid noa_attr and index changed */
3060 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3061 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3062 changed
|= BSS_CHANGED_P2P_PS
;
3064 * make sure we update all information, the CRC
3065 * mechanism doesn't look at P2P attributes.
3067 ifmgd
->beacon_crc_valid
= false;
3069 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3070 /* noa_attr not found and we had valid noa_attr before */
3071 sdata
->u
.mgd
.p2p_noa_index
= -1;
3072 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3073 changed
|= BSS_CHANGED_P2P_PS
;
3074 ifmgd
->beacon_crc_valid
= false;
3078 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3079 return RX_MGMT_NONE
;
3080 ifmgd
->beacon_crc
= ncrc
;
3081 ifmgd
->beacon_crc_valid
= true;
3083 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3085 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3086 elems
.wmm_param_len
))
3087 changed
|= BSS_CHANGED_QOS
;
3090 * If we haven't had a beacon before, tell the driver about the
3091 * DTIM period (and beacon timing if desired) now.
3093 if (!bss_conf
->dtim_period
) {
3094 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3096 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3098 bss_conf
->dtim_period
= 1;
3100 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3101 sdata
->vif
.bss_conf
.sync_tsf
=
3102 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3103 sdata
->vif
.bss_conf
.sync_device_ts
=
3104 rx_status
->device_timestamp
;
3106 sdata
->vif
.bss_conf
.sync_dtim_count
=
3107 elems
.tim
->dtim_count
;
3109 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3112 changed
|= BSS_CHANGED_DTIM_PERIOD
;
3115 if (elems
.erp_info
) {
3117 erp_value
= elems
.erp_info
[0];
3121 changed
|= ieee80211_handle_bss_capability(sdata
,
3122 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3123 erp_valid
, erp_value
);
3125 mutex_lock(&local
->sta_mtx
);
3126 sta
= sta_info_get(sdata
, bssid
);
3128 if (ieee80211_config_bw(sdata
, sta
, elems
.ht_operation
,
3129 elems
.vht_operation
, bssid
, &changed
)) {
3130 mutex_unlock(&local
->sta_mtx
);
3131 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3132 WLAN_REASON_DEAUTH_LEAVING
,
3134 return RX_MGMT_CFG80211_TX_DEAUTH
;
3137 if (sta
&& elems
.opmode_notif
)
3138 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3139 rx_status
->band
, true);
3140 mutex_unlock(&local
->sta_mtx
);
3142 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
3143 mgmt
->u
.probe_resp
.capab_info
&
3144 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
3145 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
3147 elems
.country_elem_len
,
3148 elems
.pwr_constr_elem
);
3150 ieee80211_bss_info_change_notify(sdata
, changed
);
3152 return RX_MGMT_NONE
;
3155 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3156 struct sk_buff
*skb
)
3158 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3159 struct ieee80211_rx_status
*rx_status
;
3160 struct ieee80211_mgmt
*mgmt
;
3161 struct cfg80211_bss
*bss
= NULL
;
3162 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
3163 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3165 struct ieee802_11_elems elems
;
3168 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3169 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3170 fc
= le16_to_cpu(mgmt
->frame_control
);
3172 mutex_lock(&ifmgd
->mtx
);
3174 switch (fc
& IEEE80211_FCTL_STYPE
) {
3175 case IEEE80211_STYPE_BEACON
:
3176 rma
= ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
3177 deauth_buf
, rx_status
);
3179 case IEEE80211_STYPE_PROBE_RESP
:
3180 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3182 case IEEE80211_STYPE_AUTH
:
3183 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3185 case IEEE80211_STYPE_DEAUTH
:
3186 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3188 case IEEE80211_STYPE_DISASSOC
:
3189 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3191 case IEEE80211_STYPE_ASSOC_RESP
:
3192 case IEEE80211_STYPE_REASSOC_RESP
:
3193 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
3195 case IEEE80211_STYPE_ACTION
:
3196 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3197 ies_len
= skb
->len
-
3198 offsetof(struct ieee80211_mgmt
,
3199 u
.action
.u
.chan_switch
.variable
);
3204 ieee802_11_parse_elems(
3205 mgmt
->u
.action
.u
.chan_switch
.variable
,
3206 ies_len
, true, &elems
);
3208 if (elems
.parse_error
)
3211 ieee80211_sta_process_chanswitch(sdata
,
3214 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3215 ies_len
= skb
->len
-
3216 offsetof(struct ieee80211_mgmt
,
3217 u
.action
.u
.ext_chan_switch
.variable
);
3222 ieee802_11_parse_elems(
3223 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3224 ies_len
, true, &elems
);
3226 if (elems
.parse_error
)
3229 /* for the handling code pretend this was also an IE */
3230 elems
.ext_chansw_ie
=
3231 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3233 ieee80211_sta_process_chanswitch(sdata
,
3239 mutex_unlock(&ifmgd
->mtx
);
3245 case RX_MGMT_CFG80211_DEAUTH
:
3246 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
3248 case RX_MGMT_CFG80211_DISASSOC
:
3249 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
3251 case RX_MGMT_CFG80211_RX_AUTH
:
3252 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
3254 case RX_MGMT_CFG80211_RX_ASSOC
:
3255 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
3257 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
3258 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
3260 case RX_MGMT_CFG80211_TX_DEAUTH
:
3261 cfg80211_send_deauth(sdata
->dev
, deauth_buf
,
3262 sizeof(deauth_buf
));
3265 WARN(1, "unexpected: %d", rma
);
3269 static void ieee80211_sta_timer(unsigned long data
)
3271 struct ieee80211_sub_if_data
*sdata
=
3272 (struct ieee80211_sub_if_data
*) data
;
3274 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3277 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3278 u8
*bssid
, u8 reason
, bool tx
)
3280 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3281 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3283 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3285 mutex_unlock(&ifmgd
->mtx
);
3288 * must be outside lock due to cfg80211,
3289 * but that's not a problem.
3291 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
3293 mutex_lock(&ifmgd
->mtx
);
3296 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3298 struct ieee80211_local
*local
= sdata
->local
;
3299 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3300 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3303 lockdep_assert_held(&ifmgd
->mtx
);
3305 if (WARN_ON_ONCE(!auth_data
))
3308 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3309 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3310 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3314 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3315 sdata_info(sdata
, "authentication with %pM timed out\n",
3316 auth_data
->bss
->bssid
);
3319 * Most likely AP is not in the range so remove the
3320 * bss struct for that AP.
3322 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3327 drv_mgd_prepare_tx(local
, sdata
);
3329 if (auth_data
->bss
->proberesp_ies
) {
3333 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3334 auth_data
->bss
->bssid
, auth_data
->tries
,
3335 IEEE80211_AUTH_MAX_TRIES
);
3337 auth_data
->expected_transaction
= 2;
3339 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3340 trans
= auth_data
->sae_trans
;
3341 status
= auth_data
->sae_status
;
3342 auth_data
->expected_transaction
= trans
;
3345 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3346 auth_data
->data
, auth_data
->data_len
,
3347 auth_data
->bss
->bssid
,
3348 auth_data
->bss
->bssid
, NULL
, 0, 0,
3353 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3354 auth_data
->bss
->bssid
, auth_data
->tries
,
3355 IEEE80211_AUTH_MAX_TRIES
);
3358 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3364 * Direct probe is sent to broadcast address as some APs
3365 * will not answer to direct packet in unassociated state.
3367 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
3368 NULL
, 0, (u32
) -1, true, tx_flags
,
3369 auth_data
->bss
->channel
, false);
3373 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3374 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3375 ifmgd
->auth_data
->timeout_started
= true;
3376 run_again(ifmgd
, auth_data
->timeout
);
3378 auth_data
->timeout_started
= false;
3384 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3386 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3387 struct ieee80211_local
*local
= sdata
->local
;
3389 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
3391 assoc_data
->tries
++;
3392 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3393 sdata_info(sdata
, "association with %pM timed out\n",
3394 assoc_data
->bss
->bssid
);
3397 * Most likely AP is not in the range so remove the
3398 * bss struct for that AP.
3400 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3405 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3406 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3407 IEEE80211_ASSOC_MAX_TRIES
);
3408 ieee80211_send_assoc(sdata
);
3410 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3411 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3412 assoc_data
->timeout_started
= true;
3413 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
3415 assoc_data
->timeout_started
= false;
3421 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3422 __le16 fc
, bool acked
)
3424 struct ieee80211_local
*local
= sdata
->local
;
3426 sdata
->u
.mgd
.status_fc
= fc
;
3427 sdata
->u
.mgd
.status_acked
= acked
;
3428 sdata
->u
.mgd
.status_received
= true;
3430 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3433 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3435 struct ieee80211_local
*local
= sdata
->local
;
3436 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3438 mutex_lock(&ifmgd
->mtx
);
3440 if (ifmgd
->status_received
) {
3441 __le16 fc
= ifmgd
->status_fc
;
3442 bool status_acked
= ifmgd
->status_acked
;
3444 ifmgd
->status_received
= false;
3445 if (ifmgd
->auth_data
&&
3446 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3448 ifmgd
->auth_data
->timeout
=
3449 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3450 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3452 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3454 ifmgd
->auth_data
->timeout_started
= true;
3455 } else if (ifmgd
->assoc_data
&&
3456 (ieee80211_is_assoc_req(fc
) ||
3457 ieee80211_is_reassoc_req(fc
))) {
3459 ifmgd
->assoc_data
->timeout
=
3460 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3461 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3463 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3465 ifmgd
->assoc_data
->timeout_started
= true;
3469 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3470 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3471 if (ifmgd
->auth_data
->done
) {
3473 * ok ... we waited for assoc but userspace didn't,
3474 * so let's just kill the auth data
3476 ieee80211_destroy_auth_data(sdata
, false);
3477 } else if (ieee80211_probe_auth(sdata
)) {
3480 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3482 ieee80211_destroy_auth_data(sdata
, false);
3484 mutex_unlock(&ifmgd
->mtx
);
3485 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
3486 mutex_lock(&ifmgd
->mtx
);
3488 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3489 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3491 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3492 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3493 if ((ifmgd
->assoc_data
->need_beacon
&&
3494 !ifmgd
->assoc_data
->have_beacon
) ||
3495 ieee80211_do_assoc(sdata
)) {
3498 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
3500 ieee80211_destroy_assoc_data(sdata
, false);
3502 mutex_unlock(&ifmgd
->mtx
);
3503 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
3504 mutex_lock(&ifmgd
->mtx
);
3506 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3507 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3509 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
3510 IEEE80211_STA_CONNECTION_POLL
) &&
3511 ifmgd
->associated
) {
3515 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3517 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3518 max_tries
= max_nullfunc_tries
;
3520 max_tries
= max_probe_tries
;
3522 /* ACK received for nullfunc probing frame */
3523 if (!ifmgd
->probe_send_count
)
3524 ieee80211_reset_ap_probe(sdata
);
3525 else if (ifmgd
->nullfunc_failed
) {
3526 if (ifmgd
->probe_send_count
< max_tries
) {
3528 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3529 bssid
, ifmgd
->probe_send_count
,
3531 ieee80211_mgd_probe_ap_send(sdata
);
3534 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3536 ieee80211_sta_connection_lost(sdata
, bssid
,
3537 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3540 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3541 run_again(ifmgd
, ifmgd
->probe_timeout
);
3542 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3544 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3545 bssid
, probe_wait_ms
);
3546 ieee80211_sta_connection_lost(sdata
, bssid
,
3547 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3548 } else if (ifmgd
->probe_send_count
< max_tries
) {
3550 "No probe response from AP %pM after %dms, try %d/%i\n",
3551 bssid
, probe_wait_ms
,
3552 ifmgd
->probe_send_count
, max_tries
);
3553 ieee80211_mgd_probe_ap_send(sdata
);
3556 * We actually lost the connection ... or did we?
3559 wiphy_debug(local
->hw
.wiphy
,
3560 "%s: No probe response from AP %pM"
3561 " after %dms, disconnecting.\n",
3563 bssid
, probe_wait_ms
);
3565 ieee80211_sta_connection_lost(sdata
, bssid
,
3566 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3570 mutex_unlock(&ifmgd
->mtx
);
3573 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3575 struct ieee80211_sub_if_data
*sdata
=
3576 (struct ieee80211_sub_if_data
*) data
;
3577 struct ieee80211_local
*local
= sdata
->local
;
3579 if (local
->quiescing
)
3582 sdata
->u
.mgd
.connection_loss
= false;
3583 ieee80211_queue_work(&sdata
->local
->hw
,
3584 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3587 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3589 struct ieee80211_sub_if_data
*sdata
=
3590 (struct ieee80211_sub_if_data
*) data
;
3591 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3592 struct ieee80211_local
*local
= sdata
->local
;
3594 if (local
->quiescing
)
3597 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3600 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3602 struct ieee80211_sub_if_data
*sdata
=
3603 container_of(work
, struct ieee80211_sub_if_data
,
3604 u
.mgd
.monitor_work
);
3606 ieee80211_mgd_probe_ap(sdata
, false);
3609 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3613 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3614 __ieee80211_stop_poll(sdata
);
3616 /* let's probe the connection once */
3617 flags
= sdata
->local
->hw
.flags
;
3618 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3619 ieee80211_queue_work(&sdata
->local
->hw
,
3620 &sdata
->u
.mgd
.monitor_work
);
3621 /* and do all the other regular work too */
3622 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3626 /* interface setup */
3627 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3629 struct ieee80211_if_managed
*ifmgd
;
3631 ifmgd
= &sdata
->u
.mgd
;
3632 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3633 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3634 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3635 ieee80211_beacon_connection_loss_work
);
3636 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3637 ieee80211_csa_connection_drop_work
);
3638 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3639 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3640 (unsigned long) sdata
);
3641 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3642 (unsigned long) sdata
);
3643 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3644 (unsigned long) sdata
);
3645 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3646 (unsigned long) sdata
);
3649 ifmgd
->powersave
= sdata
->wdev
.ps
;
3650 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
3651 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
3652 ifmgd
->p2p_noa_index
= -1;
3654 mutex_init(&ifmgd
->mtx
);
3656 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3657 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3659 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3662 /* scan finished notification */
3663 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3665 struct ieee80211_sub_if_data
*sdata
;
3667 /* Restart STA timers */
3669 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3670 if (ieee80211_sdata_running(sdata
))
3671 ieee80211_restart_sta_timer(sdata
);
3676 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3677 unsigned long data
, void *dummy
)
3679 s32 latency_usec
= (s32
) data
;
3680 struct ieee80211_local
*local
=
3681 container_of(nb
, struct ieee80211_local
,
3682 network_latency_notifier
);
3684 mutex_lock(&local
->iflist_mtx
);
3685 ieee80211_recalc_ps(local
, latency_usec
);
3686 mutex_unlock(&local
->iflist_mtx
);
3691 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3692 struct cfg80211_bss
*cbss
)
3694 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3695 const u8
*ht_cap_ie
, *vht_cap_ie
;
3696 const struct ieee80211_ht_cap
*ht_cap
;
3697 const struct ieee80211_vht_cap
*vht_cap
;
3700 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3703 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3704 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3705 ht_cap
= (void *)(ht_cap_ie
+ 2);
3706 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3708 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3709 * "Tx Unequal Modulation Supported" fields.
3713 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3716 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3717 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3721 vht_cap
= (void *)(vht_cap_ie
+ 2);
3722 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3723 for (nss
= 8; nss
> 0; nss
--) {
3724 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3725 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3728 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3729 chains
= max(chains
, nss
);
3735 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3736 struct cfg80211_bss
*cbss
)
3738 struct ieee80211_local
*local
= sdata
->local
;
3739 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3740 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3741 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3742 struct ieee80211_supported_band
*sband
;
3743 struct cfg80211_chan_def chandef
;
3746 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3748 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3749 IEEE80211_STA_DISABLE_80P80MHZ
|
3750 IEEE80211_STA_DISABLE_160MHZ
);
3754 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3755 sband
->ht_cap
.ht_supported
) {
3756 const u8
*ht_oper_ie
, *ht_cap
;
3758 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3759 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3760 ht_oper
= (void *)(ht_oper_ie
+ 2);
3762 ht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3763 if (!ht_cap
|| ht_cap
[1] < sizeof(struct ieee80211_ht_cap
)) {
3764 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3769 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3770 sband
->vht_cap
.vht_supported
) {
3771 const u8
*vht_oper_ie
, *vht_cap
;
3773 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3774 WLAN_EID_VHT_OPERATION
);
3775 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3776 vht_oper
= (void *)(vht_oper_ie
+ 2);
3777 if (vht_oper
&& !ht_oper
) {
3780 "AP advertised VHT without HT, disabling both\n");
3781 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3782 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3785 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3786 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
3787 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3792 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3797 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3802 /* will change later if needed */
3803 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3806 * If this fails (possibly due to channel context sharing
3807 * on incompatible channels, e.g. 80+80 and 160 sharing the
3808 * same control channel) try to use a smaller bandwidth.
3810 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3811 IEEE80211_CHANCTX_SHARED
);
3812 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
3813 ifmgd
->flags
|= chandef_downgrade(&chandef
);
3814 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3815 IEEE80211_CHANCTX_SHARED
);
3820 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3821 struct cfg80211_bss
*cbss
, bool assoc
)
3823 struct ieee80211_local
*local
= sdata
->local
;
3824 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3825 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3826 struct sta_info
*new_sta
= NULL
;
3827 bool have_sta
= false;
3830 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3835 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3840 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3846 u32 rates
= 0, basic_rates
= 0;
3847 bool have_higher_than_11mbit
;
3848 int min_rate
= INT_MAX
, min_rate_index
= -1;
3849 struct ieee80211_supported_band
*sband
;
3850 const struct cfg80211_bss_ies
*ies
;
3852 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3854 err
= ieee80211_prep_channel(sdata
, cbss
);
3856 sta_info_free(local
, new_sta
);
3860 ieee80211_get_rates(sband
, bss
->supp_rates
,
3861 bss
->supp_rates_len
,
3862 &rates
, &basic_rates
,
3863 &have_higher_than_11mbit
,
3864 &min_rate
, &min_rate_index
);
3867 * This used to be a workaround for basic rates missing
3868 * in the association response frame. Now that we no
3869 * longer use the basic rates from there, it probably
3870 * doesn't happen any more, but keep the workaround so
3871 * in case some *other* APs are buggy in different ways
3872 * we can connect -- with a warning.
3874 if (!basic_rates
&& min_rate_index
>= 0) {
3876 "No basic rates, using min rate instead\n");
3877 basic_rates
= BIT(min_rate_index
);
3880 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3881 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3883 /* cf. IEEE 802.11 9.2.12 */
3884 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3885 have_higher_than_11mbit
)
3886 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3888 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3890 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3892 /* set timing information */
3893 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3895 ies
= rcu_dereference(cbss
->beacon_ies
);
3899 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3900 sdata
->vif
.bss_conf
.sync_device_ts
=
3901 bss
->device_ts_beacon
;
3902 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
3903 ies
->data
, ies
->len
);
3904 if (tim_ie
&& tim_ie
[1] >= 2)
3905 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
3907 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3908 } else if (!(local
->hw
.flags
&
3909 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
3910 ies
= rcu_dereference(cbss
->proberesp_ies
);
3911 /* must be non-NULL since beacon IEs were NULL */
3912 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3913 sdata
->vif
.bss_conf
.sync_device_ts
=
3914 bss
->device_ts_presp
;
3915 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3917 sdata
->vif
.bss_conf
.sync_tsf
= 0;
3918 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
3919 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3923 /* tell driver about BSSID, basic rates and timing */
3924 ieee80211_bss_info_change_notify(sdata
,
3925 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3926 BSS_CHANGED_BEACON_INT
);
3929 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3931 err
= sta_info_insert(new_sta
);
3935 "failed to insert STA entry for the AP (error %d)\n",
3940 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3946 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3947 struct cfg80211_auth_request
*req
)
3949 struct ieee80211_local
*local
= sdata
->local
;
3950 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3951 struct ieee80211_mgd_auth_data
*auth_data
;
3955 /* prepare auth data structure */
3957 switch (req
->auth_type
) {
3958 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3959 auth_alg
= WLAN_AUTH_OPEN
;
3961 case NL80211_AUTHTYPE_SHARED_KEY
:
3962 if (IS_ERR(local
->wep_tx_tfm
))
3964 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3966 case NL80211_AUTHTYPE_FT
:
3967 auth_alg
= WLAN_AUTH_FT
;
3969 case NL80211_AUTHTYPE_NETWORK_EAP
:
3970 auth_alg
= WLAN_AUTH_LEAP
;
3972 case NL80211_AUTHTYPE_SAE
:
3973 auth_alg
= WLAN_AUTH_SAE
;
3979 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
3980 req
->ie_len
, GFP_KERNEL
);
3984 auth_data
->bss
= req
->bss
;
3986 if (req
->sae_data_len
>= 4) {
3987 __le16
*pos
= (__le16
*) req
->sae_data
;
3988 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
3989 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
3990 memcpy(auth_data
->data
, req
->sae_data
+ 4,
3991 req
->sae_data_len
- 4);
3992 auth_data
->data_len
+= req
->sae_data_len
- 4;
3995 if (req
->ie
&& req
->ie_len
) {
3996 memcpy(&auth_data
->data
[auth_data
->data_len
],
3997 req
->ie
, req
->ie_len
);
3998 auth_data
->data_len
+= req
->ie_len
;
4001 if (req
->key
&& req
->key_len
) {
4002 auth_data
->key_len
= req
->key_len
;
4003 auth_data
->key_idx
= req
->key_idx
;
4004 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4007 auth_data
->algorithm
= auth_alg
;
4009 /* try to authenticate/probe */
4011 mutex_lock(&ifmgd
->mtx
);
4013 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4014 ifmgd
->assoc_data
) {
4019 if (ifmgd
->auth_data
)
4020 ieee80211_destroy_auth_data(sdata
, false);
4022 /* prep auth_data so we don't go into idle on disassoc */
4023 ifmgd
->auth_data
= auth_data
;
4025 if (ifmgd
->associated
) {
4026 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4028 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4029 WLAN_REASON_UNSPECIFIED
,
4032 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4036 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4038 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
4042 err
= ieee80211_probe_auth(sdata
);
4044 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4048 /* hold our own reference */
4049 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4054 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4055 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4056 ifmgd
->auth_data
= NULL
;
4060 mutex_unlock(&ifmgd
->mtx
);
4065 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4066 struct cfg80211_assoc_request
*req
)
4068 struct ieee80211_local
*local
= sdata
->local
;
4069 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4070 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4071 struct ieee80211_mgd_assoc_data
*assoc_data
;
4072 const struct cfg80211_bss_ies
*beacon_ies
;
4073 struct ieee80211_supported_band
*sband
;
4074 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4077 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4082 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4088 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4089 assoc_data
->ssid_len
= ssidie
[1];
4092 mutex_lock(&ifmgd
->mtx
);
4094 if (ifmgd
->associated
) {
4095 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4097 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4098 WLAN_REASON_UNSPECIFIED
,
4101 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4105 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4110 if (ifmgd
->assoc_data
) {
4115 if (ifmgd
->auth_data
) {
4118 /* keep sta info, bssid if matching */
4119 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4120 ieee80211_destroy_auth_data(sdata
, match
);
4123 /* prepare assoc data */
4125 ifmgd
->beacon_crc_valid
= false;
4128 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4129 * We still associate in non-HT mode (11a/b/g) if any one of these
4130 * ciphers is configured as pairwise.
4131 * We can set this to true for non-11n hardware, that'll be checked
4132 * separately along with the peer capabilities.
4134 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4135 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4136 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4137 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4138 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4139 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4140 netdev_info(sdata
->dev
,
4141 "disabling HT/VHT due to WEP/TKIP use\n");
4145 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4146 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4147 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4150 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4151 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4153 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4154 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4155 if (!sband
->ht_cap
.ht_supported
||
4156 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4157 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4159 netdev_info(sdata
->dev
,
4160 "disabling HT as WMM/QoS is not supported by the AP\n");
4163 /* disable VHT if we don't support it or the AP doesn't use WMM */
4164 if (!sband
->vht_cap
.vht_supported
||
4165 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4166 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4168 netdev_info(sdata
->dev
,
4169 "disabling VHT as WMM/QoS is not supported by the AP\n");
4172 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4173 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4174 sizeof(ifmgd
->ht_capa_mask
));
4176 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4177 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4178 sizeof(ifmgd
->vht_capa_mask
));
4180 if (req
->ie
&& req
->ie_len
) {
4181 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4182 assoc_data
->ie_len
= req
->ie_len
;
4185 assoc_data
->bss
= req
->bss
;
4187 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4188 if (ifmgd
->powersave
)
4189 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4191 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4193 sdata
->smps_mode
= ifmgd
->req_smps
;
4195 assoc_data
->capability
= req
->bss
->capability
;
4196 assoc_data
->wmm
= bss
->wmm_used
&&
4197 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4198 assoc_data
->supp_rates
= bss
->supp_rates
;
4199 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4202 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4203 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4204 assoc_data
->ap_ht_param
=
4205 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4207 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4208 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4209 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4210 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4211 sizeof(struct ieee80211_vht_cap
));
4213 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4216 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4217 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
) &&
4218 sdata
->wmm_acm
!= 0xff) {
4219 assoc_data
->uapsd
= true;
4220 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4222 assoc_data
->uapsd
= false;
4223 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4226 if (req
->prev_bssid
)
4227 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4230 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4231 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4233 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4234 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4237 if (req
->crypto
.control_port
)
4238 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4240 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4242 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4243 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4245 /* kick off associate process */
4247 ifmgd
->assoc_data
= assoc_data
;
4248 ifmgd
->dtim_period
= 0;
4250 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4255 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4257 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4260 * Wait up to one beacon interval ...
4261 * should this be more if we miss one?
4263 sdata_info(sdata
, "waiting for beacon from %pM\n",
4265 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4266 assoc_data
->timeout_started
= true;
4267 assoc_data
->need_beacon
= true;
4268 } else if (beacon_ies
) {
4269 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4274 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4275 const struct ieee80211_tim_ie
*tim
;
4276 tim
= (void *)(tim_ie
+ 2);
4277 ifmgd
->dtim_period
= tim
->dtim_period
;
4278 dtim_count
= tim
->dtim_count
;
4280 assoc_data
->have_beacon
= true;
4281 assoc_data
->timeout
= jiffies
;
4282 assoc_data
->timeout_started
= true;
4284 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4285 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4286 sdata
->vif
.bss_conf
.sync_device_ts
=
4287 bss
->device_ts_beacon
;
4288 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4291 assoc_data
->timeout
= jiffies
;
4292 assoc_data
->timeout_started
= true;
4296 run_again(ifmgd
, assoc_data
->timeout
);
4298 if (bss
->corrupt_data
) {
4299 char *corrupt_type
= "data";
4300 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4301 if (bss
->corrupt_data
&
4302 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4303 corrupt_type
= "beacon and probe response";
4305 corrupt_type
= "beacon";
4306 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4307 corrupt_type
= "probe response";
4308 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4315 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4316 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4317 ifmgd
->assoc_data
= NULL
;
4321 mutex_unlock(&ifmgd
->mtx
);
4326 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4327 struct cfg80211_deauth_request
*req
)
4329 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4330 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4331 bool tx
= !req
->local_state_change
;
4332 bool sent_frame
= false;
4334 mutex_lock(&ifmgd
->mtx
);
4337 "deauthenticating from %pM by local choice (reason=%d)\n",
4338 req
->bssid
, req
->reason_code
);
4340 if (ifmgd
->auth_data
) {
4341 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4342 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4343 IEEE80211_STYPE_DEAUTH
,
4344 req
->reason_code
, tx
,
4346 ieee80211_destroy_auth_data(sdata
, false);
4347 mutex_unlock(&ifmgd
->mtx
);
4353 if (ifmgd
->associated
&&
4354 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4355 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4356 req
->reason_code
, tx
, frame_buf
);
4359 mutex_unlock(&ifmgd
->mtx
);
4363 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4364 IEEE80211_DEAUTH_FRAME_LEN
);
4369 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4370 struct cfg80211_disassoc_request
*req
)
4372 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4374 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4376 mutex_lock(&ifmgd
->mtx
);
4379 * cfg80211 should catch this ... but it's racy since
4380 * we can receive a disassoc frame, process it, hand it
4381 * to cfg80211 while that's in a locked section already
4382 * trying to tell us that the user wants to disconnect.
4384 if (ifmgd
->associated
!= req
->bss
) {
4385 mutex_unlock(&ifmgd
->mtx
);
4390 "disassociating from %pM by local choice (reason=%d)\n",
4391 req
->bss
->bssid
, req
->reason_code
);
4393 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4394 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4395 req
->reason_code
, !req
->local_state_change
,
4397 mutex_unlock(&ifmgd
->mtx
);
4399 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
,
4400 IEEE80211_DEAUTH_FRAME_LEN
);
4405 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4407 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4410 * Make sure some work items will not run after this,
4411 * they will not do anything but might not have been
4412 * cancelled when disconnecting.
4414 cancel_work_sync(&ifmgd
->monitor_work
);
4415 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4416 cancel_work_sync(&ifmgd
->request_smps_work
);
4417 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4418 cancel_work_sync(&ifmgd
->chswitch_work
);
4420 mutex_lock(&ifmgd
->mtx
);
4421 if (ifmgd
->assoc_data
)
4422 ieee80211_destroy_assoc_data(sdata
, false);
4423 if (ifmgd
->auth_data
)
4424 ieee80211_destroy_auth_data(sdata
, false);
4425 del_timer_sync(&ifmgd
->timer
);
4426 mutex_unlock(&ifmgd
->mtx
);
4429 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4430 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4433 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4435 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4437 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4439 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);