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
,
1021 struct ieee80211_local
*local
= sdata
->local
;
1022 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1023 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1024 struct ieee80211_bss
*bss
;
1025 struct ieee80211_chanctx
*chanctx
;
1026 enum ieee80211_band new_band
;
1031 struct ieee80211_channel
*new_chan
;
1032 struct cfg80211_chan_def new_chandef
= {};
1033 struct cfg80211_chan_def new_vht_chandef
= {};
1034 const struct ieee80211_sec_chan_offs_ie
*sec_chan_offs
;
1035 const struct ieee80211_wide_bw_chansw_ie
*wide_bw_chansw_ie
;
1036 const struct ieee80211_ht_operation
*ht_oper
;
1037 int secondary_channel_offset
= -1;
1039 ASSERT_MGD_MTX(ifmgd
);
1044 if (local
->scanning
)
1047 /* disregard subsequent announcements if we are already processing */
1048 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
1051 sec_chan_offs
= elems
->sec_chan_offs
;
1052 wide_bw_chansw_ie
= elems
->wide_bw_chansw_ie
;
1053 ht_oper
= elems
->ht_operation
;
1055 if (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
1056 IEEE80211_STA_DISABLE_40MHZ
)) {
1057 sec_chan_offs
= NULL
;
1058 wide_bw_chansw_ie
= NULL
;
1059 /* only used for bandwidth here */
1063 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
1064 wide_bw_chansw_ie
= NULL
;
1066 if (elems
->ext_chansw_ie
) {
1067 if (!ieee80211_operating_class_to_band(
1068 elems
->ext_chansw_ie
->new_operating_class
,
1071 "cannot understand ECSA IE operating class %d, disconnecting\n",
1072 elems
->ext_chansw_ie
->new_operating_class
);
1073 ieee80211_queue_work(&local
->hw
,
1074 &ifmgd
->csa_connection_drop_work
);
1076 new_chan_no
= elems
->ext_chansw_ie
->new_ch_num
;
1077 count
= elems
->ext_chansw_ie
->count
;
1078 mode
= elems
->ext_chansw_ie
->mode
;
1079 } else if (elems
->ch_switch_ie
) {
1080 new_band
= cbss
->channel
->band
;
1081 new_chan_no
= elems
->ch_switch_ie
->new_ch_num
;
1082 count
= elems
->ch_switch_ie
->count
;
1083 mode
= elems
->ch_switch_ie
->mode
;
1085 /* nothing here we understand */
1089 bss
= (void *)cbss
->priv
;
1091 new_freq
= ieee80211_channel_to_frequency(new_chan_no
, new_band
);
1092 new_chan
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
1093 if (!new_chan
|| new_chan
->flags
& IEEE80211_CHAN_DISABLED
) {
1095 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1096 ifmgd
->associated
->bssid
, new_freq
);
1097 ieee80211_queue_work(&local
->hw
,
1098 &ifmgd
->csa_connection_drop_work
);
1102 if (!beacon
&& sec_chan_offs
) {
1103 secondary_channel_offset
= sec_chan_offs
->sec_chan_offs
;
1104 } else if (beacon
&& ht_oper
) {
1105 secondary_channel_offset
=
1106 ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
;
1107 } else if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
1109 * If it's not a beacon, HT is enabled and the IE not present,
1110 * it's 20 MHz, 802.11-2012 8.5.2.6:
1111 * This element [the Secondary Channel Offset Element] is
1112 * present when switching to a 40 MHz channel. It may be
1113 * present when switching to a 20 MHz channel (in which
1114 * case the secondary channel offset is set to SCN).
1116 secondary_channel_offset
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1119 switch (secondary_channel_offset
) {
1121 /* secondary_channel_offset was present but is invalid */
1122 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1123 cfg80211_chandef_create(&new_chandef
, new_chan
,
1126 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1127 cfg80211_chandef_create(&new_chandef
, new_chan
,
1128 NL80211_CHAN_HT40PLUS
);
1130 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1131 cfg80211_chandef_create(&new_chandef
, new_chan
,
1132 NL80211_CHAN_HT40MINUS
);
1135 cfg80211_chandef_create(&new_chandef
, new_chan
,
1136 NL80211_CHAN_NO_HT
);
1140 if (wide_bw_chansw_ie
) {
1141 new_vht_chandef
.chan
= new_chan
;
1142 new_vht_chandef
.center_freq1
=
1143 ieee80211_channel_to_frequency(
1144 wide_bw_chansw_ie
->new_center_freq_seg0
,
1147 switch (wide_bw_chansw_ie
->new_channel_width
) {
1149 /* hmmm, ignore VHT and use HT if present */
1150 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
1151 new_vht_chandef
.chan
= NULL
;
1153 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
1154 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
1156 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
1157 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
1159 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
1160 /* field is otherwise reserved */
1161 new_vht_chandef
.center_freq2
=
1162 ieee80211_channel_to_frequency(
1163 wide_bw_chansw_ie
->new_center_freq_seg1
,
1165 new_vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
1168 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
1169 new_vht_chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
1170 chandef_downgrade(&new_vht_chandef
);
1171 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
1172 new_vht_chandef
.width
== NL80211_CHAN_WIDTH_160
)
1173 chandef_downgrade(&new_vht_chandef
);
1174 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
1175 new_vht_chandef
.width
> NL80211_CHAN_WIDTH_20
)
1176 chandef_downgrade(&new_vht_chandef
);
1179 /* if VHT data is there validate & use it */
1180 if (new_vht_chandef
.chan
) {
1181 if (!cfg80211_chandef_compatible(&new_vht_chandef
,
1184 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1185 ifmgd
->associated
->bssid
);
1186 ieee80211_queue_work(&local
->hw
,
1187 &ifmgd
->csa_connection_drop_work
);
1190 new_chandef
= new_vht_chandef
;
1193 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &new_chandef
,
1194 IEEE80211_CHAN_DISABLED
)) {
1196 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1197 ifmgd
->associated
->bssid
, new_freq
,
1198 new_chandef
.width
, new_chandef
.center_freq1
,
1199 new_chandef
.center_freq2
);
1200 ieee80211_queue_work(&local
->hw
,
1201 &ifmgd
->csa_connection_drop_work
);
1205 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
1207 if (local
->use_chanctx
) {
1209 "not handling channel switch with channel contexts\n");
1210 ieee80211_queue_work(&local
->hw
,
1211 &ifmgd
->csa_connection_drop_work
);
1215 mutex_lock(&local
->chanctx_mtx
);
1216 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
1217 mutex_unlock(&local
->chanctx_mtx
);
1220 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
1221 struct ieee80211_chanctx
, conf
);
1222 if (chanctx
->refcount
> 1) {
1224 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1225 ieee80211_queue_work(&local
->hw
,
1226 &ifmgd
->csa_connection_drop_work
);
1227 mutex_unlock(&local
->chanctx_mtx
);
1230 mutex_unlock(&local
->chanctx_mtx
);
1232 local
->csa_chandef
= new_chandef
;
1235 ieee80211_stop_queues_by_reason(&local
->hw
,
1236 IEEE80211_MAX_QUEUE_MAP
,
1237 IEEE80211_QUEUE_STOP_REASON_CSA
);
1239 if (local
->ops
->channel_switch
) {
1240 /* use driver's channel switch callback */
1241 struct ieee80211_channel_switch ch_switch
= {
1242 .timestamp
= timestamp
,
1244 .chandef
= new_chandef
,
1248 drv_channel_switch(local
, &ch_switch
);
1252 /* channel switch handled in software */
1254 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1256 mod_timer(&ifmgd
->chswitch_timer
,
1257 TU_TO_EXP_TIME(count
* cbss
->beacon_interval
));
1260 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1261 struct ieee80211_channel
*channel
,
1262 const u8
*country_ie
, u8 country_ie_len
,
1263 const u8
*pwr_constr_elem
)
1265 struct ieee80211_country_ie_triplet
*triplet
;
1266 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1267 int i
, chan_pwr
, chan_increment
, new_ap_level
;
1268 bool have_chan_pwr
= false;
1271 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1274 triplet
= (void *)(country_ie
+ 3);
1275 country_ie_len
-= 3;
1277 switch (channel
->band
) {
1281 case IEEE80211_BAND_2GHZ
:
1282 case IEEE80211_BAND_60GHZ
:
1285 case IEEE80211_BAND_5GHZ
:
1291 while (country_ie_len
>= 3) {
1292 u8 first_channel
= triplet
->chans
.first_channel
;
1294 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1297 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1298 if (first_channel
+ i
* chan_increment
== chan
) {
1299 have_chan_pwr
= true;
1300 chan_pwr
= triplet
->chans
.max_power
;
1309 country_ie_len
-= 3;
1315 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
1317 if (sdata
->ap_power_level
== new_ap_level
)
1321 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1322 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
1323 sdata
->u
.mgd
.bssid
);
1324 sdata
->ap_power_level
= new_ap_level
;
1325 if (__ieee80211_recalc_txpower(sdata
))
1326 return BSS_CHANGED_TXPOWER
;
1331 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1332 struct ieee80211_sub_if_data
*sdata
)
1334 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1337 * If we are scanning right now then the parameters will
1338 * take effect when scan finishes.
1340 if (local
->scanning
)
1343 if (conf
->dynamic_ps_timeout
> 0 &&
1344 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1345 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1346 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1348 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1349 ieee80211_send_nullfunc(local
, sdata
, 1);
1351 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1352 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1355 conf
->flags
|= IEEE80211_CONF_PS
;
1356 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1360 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1362 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1364 if (local
->ps_sdata
) {
1365 ieee80211_enable_ps(local
, local
->ps_sdata
);
1366 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1367 conf
->flags
&= ~IEEE80211_CONF_PS
;
1368 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1369 del_timer_sync(&local
->dynamic_ps_timer
);
1370 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1374 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1376 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1377 struct sta_info
*sta
= NULL
;
1378 bool authorized
= false;
1380 if (!mgd
->powersave
)
1386 if (!mgd
->associated
)
1389 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1390 IEEE80211_STA_CONNECTION_POLL
))
1394 sta
= sta_info_get(sdata
, mgd
->bssid
);
1396 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1402 /* need to hold RTNL or interface lock */
1403 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1405 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1409 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1410 local
->ps_sdata
= NULL
;
1414 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1415 if (!ieee80211_sdata_running(sdata
))
1417 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1418 /* If an AP vif is found, then disable PS
1419 * by setting the count to zero thereby setting
1425 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1431 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1435 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1437 beaconint_us
= ieee80211_tu_to_usec(
1438 found
->vif
.bss_conf
.beacon_int
);
1440 timeout
= local
->dynamic_ps_forced_timeout
;
1443 * Go to full PSM if the user configures a very low
1444 * latency requirement.
1445 * The 2000 second value is there for compatibility
1446 * until the PM_QOS_NETWORK_LATENCY is configured
1449 if (latency
> (1900 * USEC_PER_MSEC
) &&
1450 latency
!= (2000 * USEC_PER_SEC
))
1455 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1457 if (beaconint_us
> latency
) {
1458 local
->ps_sdata
= NULL
;
1461 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1463 /* If the TIM IE is invalid, pretend the value is 1 */
1466 else if (dtimper
> 1)
1467 maxslp
= min_t(int, dtimper
,
1468 latency
/ beaconint_us
);
1470 local
->hw
.conf
.max_sleep_period
= maxslp
;
1471 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1472 local
->ps_sdata
= found
;
1475 local
->ps_sdata
= NULL
;
1478 ieee80211_change_ps(local
);
1481 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1483 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1485 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1486 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1487 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1491 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1493 struct ieee80211_local
*local
=
1494 container_of(work
, struct ieee80211_local
,
1495 dynamic_ps_disable_work
);
1497 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1498 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1499 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1502 ieee80211_wake_queues_by_reason(&local
->hw
,
1503 IEEE80211_MAX_QUEUE_MAP
,
1504 IEEE80211_QUEUE_STOP_REASON_PS
);
1507 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1509 struct ieee80211_local
*local
=
1510 container_of(work
, struct ieee80211_local
,
1511 dynamic_ps_enable_work
);
1512 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1513 struct ieee80211_if_managed
*ifmgd
;
1514 unsigned long flags
;
1517 /* can only happen when PS was just disabled anyway */
1521 ifmgd
= &sdata
->u
.mgd
;
1523 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1526 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1527 /* don't enter PS if TX frames are pending */
1528 if (drv_tx_frames_pending(local
)) {
1529 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1531 local
->hw
.conf
.dynamic_ps_timeout
));
1536 * transmission can be stopped by others which leads to
1537 * dynamic_ps_timer expiry. Postpone the ps timer if it
1538 * is not the actual idle state.
1540 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1541 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1542 if (local
->queue_stop_reasons
[q
]) {
1543 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1545 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1547 local
->hw
.conf
.dynamic_ps_timeout
));
1551 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1554 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1555 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1556 if (drv_tx_frames_pending(local
)) {
1557 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1559 local
->hw
.conf
.dynamic_ps_timeout
));
1561 ieee80211_send_nullfunc(local
, sdata
, 1);
1562 /* Flush to get the tx status of nullfunc frame */
1563 ieee80211_flush_queues(local
, sdata
);
1567 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1568 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1569 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1570 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1571 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1572 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1576 void ieee80211_dynamic_ps_timer(unsigned long data
)
1578 struct ieee80211_local
*local
= (void *) data
;
1580 if (local
->quiescing
|| local
->suspended
)
1583 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1586 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1588 struct delayed_work
*delayed_work
=
1589 container_of(work
, struct delayed_work
, work
);
1590 struct ieee80211_sub_if_data
*sdata
=
1591 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1592 dfs_cac_timer_work
);
1594 ieee80211_vif_release_channel(sdata
);
1596 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_FINISHED
, GFP_KERNEL
);
1600 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1601 struct ieee80211_sub_if_data
*sdata
,
1602 const u8
*wmm_param
, size_t wmm_param_len
)
1604 struct ieee80211_tx_queue_params params
;
1605 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1609 u8 uapsd_queues
= 0;
1611 if (!local
->ops
->conf_tx
)
1614 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1620 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1623 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1624 uapsd_queues
= ifmgd
->uapsd_queues
;
1626 count
= wmm_param
[6] & 0x0f;
1627 if (count
== ifmgd
->wmm_last_param_set
)
1629 ifmgd
->wmm_last_param_set
= count
;
1631 pos
= wmm_param
+ 8;
1632 left
= wmm_param_len
- 8;
1634 memset(¶ms
, 0, sizeof(params
));
1637 for (; left
>= 4; left
-= 4, pos
+= 4) {
1638 int aci
= (pos
[0] >> 5) & 0x03;
1639 int acm
= (pos
[0] >> 4) & 0x01;
1647 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1648 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1654 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1655 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1661 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1662 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1669 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1670 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1675 params
.aifs
= pos
[0] & 0x0f;
1676 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1677 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1678 params
.txop
= get_unaligned_le16(pos
+ 2);
1680 params
.uapsd
= uapsd
;
1683 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1685 params
.aifs
, params
.cw_min
, params
.cw_max
,
1686 params
.txop
, params
.uapsd
);
1687 sdata
->tx_conf
[queue
] = params
;
1688 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1690 "failed to set TX queue parameters for queue %d\n",
1694 /* enable WMM or activate new settings */
1695 sdata
->vif
.bss_conf
.qos
= true;
1699 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1701 lockdep_assert_held(&sdata
->local
->mtx
);
1703 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1704 IEEE80211_STA_BEACON_POLL
);
1705 ieee80211_run_deferred_scan(sdata
->local
);
1708 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1710 mutex_lock(&sdata
->local
->mtx
);
1711 __ieee80211_stop_poll(sdata
);
1712 mutex_unlock(&sdata
->local
->mtx
);
1715 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1716 u16 capab
, bool erp_valid
, u8 erp
)
1718 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1720 bool use_protection
;
1721 bool use_short_preamble
;
1722 bool use_short_slot
;
1725 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1726 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1728 use_protection
= false;
1729 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1732 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1733 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1734 use_short_slot
= true;
1736 if (use_protection
!= bss_conf
->use_cts_prot
) {
1737 bss_conf
->use_cts_prot
= use_protection
;
1738 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1741 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1742 bss_conf
->use_short_preamble
= use_short_preamble
;
1743 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1746 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1747 bss_conf
->use_short_slot
= use_short_slot
;
1748 changed
|= BSS_CHANGED_ERP_SLOT
;
1754 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1755 struct cfg80211_bss
*cbss
,
1756 u32 bss_info_changed
)
1758 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1759 struct ieee80211_local
*local
= sdata
->local
;
1760 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1762 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1763 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1764 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1766 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1767 beacon_loss_count
* bss_conf
->beacon_int
));
1769 sdata
->u
.mgd
.associated
= cbss
;
1770 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1772 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1774 if (sdata
->vif
.p2p
) {
1775 const struct cfg80211_bss_ies
*ies
;
1778 ies
= rcu_dereference(cbss
->ies
);
1782 ret
= cfg80211_get_p2p_attr(
1783 ies
->data
, ies
->len
,
1784 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1785 (u8
*) &bss_conf
->p2p_noa_attr
,
1786 sizeof(bss_conf
->p2p_noa_attr
));
1788 sdata
->u
.mgd
.p2p_noa_index
=
1789 bss_conf
->p2p_noa_attr
.index
;
1790 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1796 /* just to be sure */
1797 ieee80211_stop_poll(sdata
);
1799 ieee80211_led_assoc(local
, 1);
1801 if (sdata
->u
.mgd
.assoc_data
->have_beacon
) {
1803 * If the AP is buggy we may get here with no DTIM period
1804 * known, so assume it's 1 which is the only safe assumption
1805 * in that case, although if the TIM IE is broken powersave
1806 * probably just won't work at all.
1808 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1809 bss_info_changed
|= BSS_CHANGED_DTIM_PERIOD
;
1811 bss_conf
->dtim_period
= 0;
1814 bss_conf
->assoc
= 1;
1816 /* Tell the driver to monitor connection quality (if supported) */
1817 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1818 bss_conf
->cqm_rssi_thold
)
1819 bss_info_changed
|= BSS_CHANGED_CQM
;
1821 /* Enable ARP filtering */
1822 if (bss_conf
->arp_addr_cnt
)
1823 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1825 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1827 mutex_lock(&local
->iflist_mtx
);
1828 ieee80211_recalc_ps(local
, -1);
1829 mutex_unlock(&local
->iflist_mtx
);
1831 ieee80211_recalc_smps(sdata
);
1832 ieee80211_recalc_ps_vif(sdata
);
1834 netif_carrier_on(sdata
->dev
);
1837 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1838 u16 stype
, u16 reason
, bool tx
,
1841 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1842 struct ieee80211_local
*local
= sdata
->local
;
1845 ASSERT_MGD_MTX(ifmgd
);
1847 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1850 if (WARN_ON(!ifmgd
->associated
))
1853 ieee80211_stop_poll(sdata
);
1855 ifmgd
->associated
= NULL
;
1856 netif_carrier_off(sdata
->dev
);
1859 * if we want to get out of ps before disassoc (why?) we have
1860 * to do it before sending disassoc, as otherwise the null-packet
1863 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1864 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1865 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1867 local
->ps_sdata
= NULL
;
1869 /* disable per-vif ps */
1870 ieee80211_recalc_ps_vif(sdata
);
1872 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1874 ieee80211_flush_queues(local
, sdata
);
1876 /* deauthenticate/disassociate now */
1877 if (tx
|| frame_buf
)
1878 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1879 reason
, tx
, frame_buf
);
1881 /* flush out frame */
1883 ieee80211_flush_queues(local
, sdata
);
1885 /* clear bssid only after building the needed mgmt frames */
1886 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1888 /* remove AP and TDLS peers */
1889 sta_info_flush_defer(sdata
);
1891 /* finally reset all BSS / config parameters */
1892 changed
|= ieee80211_reset_erp_info(sdata
);
1894 ieee80211_led_assoc(local
, 0);
1895 changed
|= BSS_CHANGED_ASSOC
;
1896 sdata
->vif
.bss_conf
.assoc
= false;
1898 ifmgd
->p2p_noa_index
= -1;
1899 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
1900 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
1902 /* on the next assoc, re-program HT/VHT parameters */
1903 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1904 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1905 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
1906 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
1908 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1910 del_timer_sync(&local
->dynamic_ps_timer
);
1911 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1913 /* Disable ARP filtering */
1914 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1915 changed
|= BSS_CHANGED_ARP_FILTER
;
1917 sdata
->vif
.bss_conf
.qos
= false;
1918 changed
|= BSS_CHANGED_QOS
;
1920 /* The BSSID (not really interesting) and HT changed */
1921 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1922 ieee80211_bss_info_change_notify(sdata
, changed
);
1924 /* disassociated - set to defaults now */
1925 ieee80211_set_wmm_default(sdata
, false);
1927 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1928 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1929 del_timer_sync(&sdata
->u
.mgd
.timer
);
1930 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1932 sdata
->vif
.bss_conf
.dtim_period
= 0;
1935 ieee80211_vif_release_channel(sdata
);
1938 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1939 struct ieee80211_hdr
*hdr
)
1942 * We can postpone the mgd.timer whenever receiving unicast frames
1943 * from AP because we know that the connection is working both ways
1944 * at that time. But multicast frames (and hence also beacons) must
1945 * be ignored here, because we need to trigger the timer during
1946 * data idle periods for sending the periodic probe request to the
1947 * AP we're connected to.
1949 if (is_multicast_ether_addr(hdr
->addr1
))
1952 ieee80211_sta_reset_conn_monitor(sdata
);
1955 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1957 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1958 struct ieee80211_local
*local
= sdata
->local
;
1960 mutex_lock(&local
->mtx
);
1961 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1962 IEEE80211_STA_CONNECTION_POLL
))) {
1963 mutex_unlock(&local
->mtx
);
1967 __ieee80211_stop_poll(sdata
);
1969 mutex_lock(&local
->iflist_mtx
);
1970 ieee80211_recalc_ps(local
, -1);
1971 mutex_unlock(&local
->iflist_mtx
);
1973 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1977 * We've received a probe response, but are not sure whether
1978 * we have or will be receiving any beacons or data, so let's
1979 * schedule the timers again, just in case.
1981 ieee80211_sta_reset_beacon_monitor(sdata
);
1983 mod_timer(&ifmgd
->conn_mon_timer
,
1984 round_jiffies_up(jiffies
+
1985 IEEE80211_CONNECTION_IDLE_TIME
));
1987 mutex_unlock(&local
->mtx
);
1990 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1991 struct ieee80211_hdr
*hdr
, bool ack
)
1993 if (!ieee80211_is_data(hdr
->frame_control
))
1996 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1997 sdata
->u
.mgd
.probe_send_count
> 0) {
1999 ieee80211_sta_reset_conn_monitor(sdata
);
2001 sdata
->u
.mgd
.nullfunc_failed
= true;
2002 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2007 ieee80211_sta_reset_conn_monitor(sdata
);
2010 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2012 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2014 u8
*dst
= ifmgd
->associated
->bssid
;
2015 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2018 * Try sending broadcast probe requests for the last three
2019 * probe requests after the first ones failed since some
2020 * buggy APs only support broadcast probe requests.
2022 if (ifmgd
->probe_send_count
>= unicast_limit
)
2026 * When the hardware reports an accurate Tx ACK status, it's
2027 * better to send a nullfunc frame instead of a probe request,
2028 * as it will kick us off the AP quickly if we aren't associated
2029 * anymore. The timeout will be reset if the frame is ACKed by
2032 ifmgd
->probe_send_count
++;
2034 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2035 ifmgd
->nullfunc_failed
= false;
2036 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
2041 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2042 if (WARN_ON_ONCE(ssid
== NULL
))
2047 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
2048 0, (u32
) -1, true, 0,
2049 ifmgd
->associated
->channel
, false);
2053 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2054 run_again(ifmgd
, ifmgd
->probe_timeout
);
2055 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2056 ieee80211_flush_queues(sdata
->local
, sdata
);
2059 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2062 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2063 bool already
= false;
2065 if (!ieee80211_sdata_running(sdata
))
2068 mutex_lock(&ifmgd
->mtx
);
2070 if (!ifmgd
->associated
)
2073 mutex_lock(&sdata
->local
->mtx
);
2075 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2076 mutex_unlock(&sdata
->local
->mtx
);
2081 mlme_dbg_ratelimited(sdata
,
2082 "detected beacon loss from AP (missed %d beacons) - probing\n",
2085 ieee80211_cqm_rssi_notify(&sdata
->vif
,
2086 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
,
2091 * The driver/our work has already reported this event or the
2092 * connection monitoring has kicked in and we have already sent
2093 * a probe request. Or maybe the AP died and the driver keeps
2094 * reporting until we disassociate...
2096 * In either case we have to ignore the current call to this
2097 * function (except for setting the correct probe reason bit)
2098 * because otherwise we would reset the timer every time and
2099 * never check whether we received a probe response!
2101 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2102 IEEE80211_STA_CONNECTION_POLL
))
2106 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
2108 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2110 mutex_unlock(&sdata
->local
->mtx
);
2115 mutex_lock(&sdata
->local
->iflist_mtx
);
2116 ieee80211_recalc_ps(sdata
->local
, -1);
2117 mutex_unlock(&sdata
->local
->iflist_mtx
);
2119 ifmgd
->probe_send_count
= 0;
2120 ieee80211_mgd_probe_ap_send(sdata
);
2122 mutex_unlock(&ifmgd
->mtx
);
2125 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2126 struct ieee80211_vif
*vif
)
2128 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2130 struct cfg80211_bss
*cbss
;
2131 struct sk_buff
*skb
;
2135 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2138 ASSERT_MGD_MTX(ifmgd
);
2140 if (ifmgd
->associated
)
2141 cbss
= ifmgd
->associated
;
2142 else if (ifmgd
->auth_data
)
2143 cbss
= ifmgd
->auth_data
->bss
;
2144 else if (ifmgd
->assoc_data
)
2145 cbss
= ifmgd
->assoc_data
->bss
;
2150 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2151 if (WARN_ON_ONCE(ssid
== NULL
))
2156 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
2157 (u32
) -1, cbss
->channel
,
2164 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2166 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2168 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2169 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2171 mutex_lock(&ifmgd
->mtx
);
2172 if (!ifmgd
->associated
) {
2173 mutex_unlock(&ifmgd
->mtx
);
2177 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2178 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2180 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
2181 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
2182 IEEE80211_MAX_QUEUE_MAP
,
2183 IEEE80211_QUEUE_STOP_REASON_CSA
);
2184 mutex_unlock(&ifmgd
->mtx
);
2187 * must be outside lock due to cfg80211,
2188 * but that's not a problem.
2190 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
2193 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2195 struct ieee80211_sub_if_data
*sdata
=
2196 container_of(work
, struct ieee80211_sub_if_data
,
2197 u
.mgd
.beacon_connection_loss_work
);
2198 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2199 struct sta_info
*sta
;
2201 if (ifmgd
->associated
) {
2203 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2205 sta
->beacon_loss_count
++;
2209 if (ifmgd
->connection_loss
) {
2210 sdata_info(sdata
, "Connection to AP %pM lost\n",
2212 __ieee80211_disconnect(sdata
);
2214 ieee80211_mgd_probe_ap(sdata
, true);
2218 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2220 struct ieee80211_sub_if_data
*sdata
=
2221 container_of(work
, struct ieee80211_sub_if_data
,
2222 u
.mgd
.csa_connection_drop_work
);
2224 __ieee80211_disconnect(sdata
);
2227 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2229 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2230 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2232 trace_api_beacon_loss(sdata
);
2234 sdata
->u
.mgd
.connection_loss
= false;
2235 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2237 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2239 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2241 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2242 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2244 trace_api_connection_loss(sdata
);
2246 sdata
->u
.mgd
.connection_loss
= true;
2247 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2249 EXPORT_SYMBOL(ieee80211_connection_loss
);
2252 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2255 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2257 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2260 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2262 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2263 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2264 sdata
->u
.mgd
.flags
= 0;
2265 ieee80211_vif_release_channel(sdata
);
2268 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2270 sdata
->u
.mgd
.auth_data
= NULL
;
2273 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2274 struct ieee80211_mgmt
*mgmt
, size_t len
)
2276 struct ieee80211_local
*local
= sdata
->local
;
2277 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2279 struct ieee802_11_elems elems
;
2282 pos
= mgmt
->u
.auth
.variable
;
2283 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2284 if (!elems
.challenge
)
2286 auth_data
->expected_transaction
= 4;
2287 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2288 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2289 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2290 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2291 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2292 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2293 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2294 auth_data
->key
, auth_data
->key_len
,
2295 auth_data
->key_idx
, tx_flags
);
2298 static enum rx_mgmt_action __must_check
2299 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2300 struct ieee80211_mgmt
*mgmt
, size_t len
)
2302 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2304 u16 auth_alg
, auth_transaction
, status_code
;
2305 struct sta_info
*sta
;
2307 lockdep_assert_held(&ifmgd
->mtx
);
2310 return RX_MGMT_NONE
;
2312 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2313 return RX_MGMT_NONE
;
2315 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2317 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2318 return RX_MGMT_NONE
;
2320 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2321 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2322 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2324 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2325 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2326 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2327 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2329 ifmgd
->auth_data
->expected_transaction
);
2330 return RX_MGMT_NONE
;
2333 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2334 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2335 mgmt
->sa
, status_code
);
2336 ieee80211_destroy_auth_data(sdata
, false);
2337 return RX_MGMT_CFG80211_RX_AUTH
;
2340 switch (ifmgd
->auth_data
->algorithm
) {
2341 case WLAN_AUTH_OPEN
:
2342 case WLAN_AUTH_LEAP
:
2346 case WLAN_AUTH_SHARED_KEY
:
2347 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2348 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2349 /* need another frame */
2350 return RX_MGMT_NONE
;
2354 WARN_ONCE(1, "invalid auth alg %d",
2355 ifmgd
->auth_data
->algorithm
);
2356 return RX_MGMT_NONE
;
2359 sdata_info(sdata
, "authenticated\n");
2360 ifmgd
->auth_data
->done
= true;
2361 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2362 ifmgd
->auth_data
->timeout_started
= true;
2363 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2365 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2366 ifmgd
->auth_data
->expected_transaction
!= 2) {
2368 * Report auth frame to user space for processing since another
2369 * round of Authentication frames is still needed.
2371 return RX_MGMT_CFG80211_RX_AUTH
;
2374 /* move station state to auth */
2375 mutex_lock(&sdata
->local
->sta_mtx
);
2376 sta
= sta_info_get(sdata
, bssid
);
2378 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2381 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2382 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2385 mutex_unlock(&sdata
->local
->sta_mtx
);
2387 return RX_MGMT_CFG80211_RX_AUTH
;
2389 mutex_unlock(&sdata
->local
->sta_mtx
);
2390 /* ignore frame -- wait for timeout */
2391 return RX_MGMT_NONE
;
2395 static enum rx_mgmt_action __must_check
2396 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2397 struct ieee80211_mgmt
*mgmt
, size_t len
)
2399 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2400 const u8
*bssid
= NULL
;
2403 lockdep_assert_held(&ifmgd
->mtx
);
2406 return RX_MGMT_NONE
;
2408 if (!ifmgd
->associated
||
2409 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2410 return RX_MGMT_NONE
;
2412 bssid
= ifmgd
->associated
->bssid
;
2414 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2416 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2417 bssid
, reason_code
);
2419 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2421 return RX_MGMT_CFG80211_DEAUTH
;
2425 static enum rx_mgmt_action __must_check
2426 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2427 struct ieee80211_mgmt
*mgmt
, size_t len
)
2429 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2432 lockdep_assert_held(&ifmgd
->mtx
);
2435 return RX_MGMT_NONE
;
2437 if (!ifmgd
->associated
||
2438 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2439 return RX_MGMT_NONE
;
2441 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2443 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2444 mgmt
->sa
, reason_code
);
2446 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2448 return RX_MGMT_CFG80211_DISASSOC
;
2451 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2452 u8
*supp_rates
, unsigned int supp_rates_len
,
2453 u32
*rates
, u32
*basic_rates
,
2454 bool *have_higher_than_11mbit
,
2455 int *min_rate
, int *min_rate_index
)
2459 for (i
= 0; i
< supp_rates_len
; i
++) {
2460 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2461 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2464 *have_higher_than_11mbit
= true;
2467 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2468 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2470 * Note: Even through the membership selector and the basic
2471 * rate flag share the same bit, they are not exactly
2474 if (!!(supp_rates
[i
] & 0x80) &&
2475 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2478 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2479 if (sband
->bitrates
[j
].bitrate
== rate
) {
2482 *basic_rates
|= BIT(j
);
2483 if (rate
< *min_rate
) {
2485 *min_rate_index
= j
;
2493 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2496 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2498 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2501 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2503 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2504 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2505 sdata
->u
.mgd
.flags
= 0;
2506 ieee80211_vif_release_channel(sdata
);
2510 sdata
->u
.mgd
.assoc_data
= NULL
;
2513 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2514 struct cfg80211_bss
*cbss
,
2515 struct ieee80211_mgmt
*mgmt
, size_t len
)
2517 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2518 struct ieee80211_local
*local
= sdata
->local
;
2519 struct ieee80211_supported_band
*sband
;
2520 struct sta_info
*sta
;
2522 u16 capab_info
, aid
;
2523 struct ieee802_11_elems elems
;
2524 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2525 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2526 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2531 /* AssocResp and ReassocResp have identical structure */
2533 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2534 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2536 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2537 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2539 aid
&= ~(BIT(15) | BIT(14));
2541 ifmgd
->broken_ap
= false;
2543 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2544 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2547 ifmgd
->broken_ap
= true;
2550 pos
= mgmt
->u
.assoc_resp
.variable
;
2551 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2553 if (!elems
.supp_rates
) {
2554 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2561 * Some APs are erroneously not including some information in their
2562 * (re)association response frames. Try to recover by using the data
2563 * from the beacon or probe response. This seems to afflict mobile
2564 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2565 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2567 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2568 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2569 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2570 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2571 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2572 const struct cfg80211_bss_ies
*ies
;
2573 struct ieee802_11_elems bss_elems
;
2576 ies
= rcu_dereference(cbss
->ies
);
2578 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2584 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2586 if (assoc_data
->wmm
&&
2587 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2588 elems
.wmm_param
= bss_elems
.wmm_param
;
2590 "AP bug: WMM param missing from AssocResp\n");
2594 * Also check if we requested HT/VHT, otherwise the AP doesn't
2595 * have to include the IEs in the (re)association response.
2597 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2598 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2599 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2601 "AP bug: HT capability missing from AssocResp\n");
2603 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2604 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2605 elems
.ht_operation
= bss_elems
.ht_operation
;
2607 "AP bug: HT operation missing from AssocResp\n");
2609 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2610 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2611 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2613 "AP bug: VHT capa missing from AssocResp\n");
2615 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2616 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2617 elems
.vht_operation
= bss_elems
.vht_operation
;
2619 "AP bug: VHT operation missing from AssocResp\n");
2624 * We previously checked these in the beacon/probe response, so
2625 * they should be present here. This is just a safety net.
2627 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2628 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2630 "HT AP is missing WMM params or HT capability/operation\n");
2635 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2636 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2638 "VHT AP is missing VHT capability/operation\n");
2643 mutex_lock(&sdata
->local
->sta_mtx
);
2645 * station info was already allocated and inserted before
2646 * the association and should be available to us
2648 sta
= sta_info_get(sdata
, cbss
->bssid
);
2649 if (WARN_ON(!sta
)) {
2650 mutex_unlock(&sdata
->local
->sta_mtx
);
2655 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2657 /* Set up internal HT/VHT capabilities */
2658 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2659 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2660 elems
.ht_cap_elem
, sta
);
2662 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2663 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2664 elems
.vht_cap_elem
, sta
);
2667 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2668 * in their association response, so ignore that data for our own
2669 * configuration. If it changed since the last beacon, we'll get the
2670 * next beacon and update then.
2674 * If an operating mode notification IE is present, override the
2675 * NSS calculation (that would be done in rate_control_rate_init())
2676 * and use the # of streams from that element.
2678 if (elems
.opmode_notif
&&
2679 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2682 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2683 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2685 sta
->sta
.rx_nss
= nss
;
2688 rate_control_rate_init(sta
);
2690 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2691 set_sta_flag(sta
, WLAN_STA_MFP
);
2693 if (elems
.wmm_param
)
2694 set_sta_flag(sta
, WLAN_STA_WME
);
2696 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2697 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2698 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2701 "failed to move station %pM to desired state\n",
2703 WARN_ON(__sta_info_destroy(sta
));
2704 mutex_unlock(&sdata
->local
->sta_mtx
);
2709 mutex_unlock(&sdata
->local
->sta_mtx
);
2712 * Always handle WMM once after association regardless
2713 * of the first value the AP uses. Setting -1 here has
2714 * that effect because the AP values is an unsigned
2717 ifmgd
->wmm_last_param_set
= -1;
2719 if (elems
.wmm_param
)
2720 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2721 elems
.wmm_param_len
);
2723 ieee80211_set_wmm_default(sdata
, false);
2724 changed
|= BSS_CHANGED_QOS
;
2726 /* set AID and assoc capability,
2727 * ieee80211_set_associated() will tell the driver */
2728 bss_conf
->aid
= aid
;
2729 bss_conf
->assoc_capability
= capab_info
;
2730 ieee80211_set_associated(sdata
, cbss
, changed
);
2733 * If we're using 4-addr mode, let the AP know that we're
2734 * doing so, so that it can create the STA VLAN on its side
2736 if (ifmgd
->use_4addr
)
2737 ieee80211_send_4addr_nullfunc(local
, sdata
);
2740 * Start timer to probe the connection to the AP now.
2741 * Also start the timer that will detect beacon loss.
2743 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2744 ieee80211_sta_reset_beacon_monitor(sdata
);
2752 static enum rx_mgmt_action __must_check
2753 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2754 struct ieee80211_mgmt
*mgmt
, size_t len
,
2755 struct cfg80211_bss
**bss
)
2757 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2758 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2759 u16 capab_info
, status_code
, aid
;
2760 struct ieee802_11_elems elems
;
2764 lockdep_assert_held(&ifmgd
->mtx
);
2767 return RX_MGMT_NONE
;
2768 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2769 return RX_MGMT_NONE
;
2772 * AssocResp and ReassocResp have identical structure, so process both
2773 * of them in this function.
2777 return RX_MGMT_NONE
;
2779 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2780 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2781 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2782 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2785 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2786 reassoc
? "Rea" : "A", mgmt
->sa
,
2787 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2789 pos
= mgmt
->u
.assoc_resp
.variable
;
2790 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2792 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2793 elems
.timeout_int
&&
2794 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2796 tu
= le32_to_cpu(elems
.timeout_int
->value
);
2797 ms
= tu
* 1024 / 1000;
2799 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2801 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2802 assoc_data
->timeout_started
= true;
2803 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2804 run_again(ifmgd
, assoc_data
->timeout
);
2805 return RX_MGMT_NONE
;
2808 *bss
= assoc_data
->bss
;
2810 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2811 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2812 mgmt
->sa
, status_code
);
2813 ieee80211_destroy_assoc_data(sdata
, false);
2815 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2816 /* oops -- internal error -- send timeout for now */
2817 ieee80211_destroy_assoc_data(sdata
, false);
2818 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, *bss
);
2819 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2821 sdata_info(sdata
, "associated\n");
2824 * destroy assoc_data afterwards, as otherwise an idle
2825 * recalc after assoc_data is NULL but before associated
2826 * is set can cause the interface to go idle
2828 ieee80211_destroy_assoc_data(sdata
, true);
2831 return RX_MGMT_CFG80211_RX_ASSOC
;
2834 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2835 struct ieee80211_mgmt
*mgmt
, size_t len
,
2836 struct ieee80211_rx_status
*rx_status
,
2837 struct ieee802_11_elems
*elems
)
2839 struct ieee80211_local
*local
= sdata
->local
;
2841 struct ieee80211_bss
*bss
;
2842 struct ieee80211_channel
*channel
;
2843 bool need_ps
= false;
2845 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2847 if ((sdata
->u
.mgd
.associated
&&
2848 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) ||
2849 (sdata
->u
.mgd
.assoc_data
&&
2850 ether_addr_equal(mgmt
->bssid
,
2851 sdata
->u
.mgd
.assoc_data
->bss
->bssid
))) {
2852 /* not previously set so we may need to recalc */
2853 need_ps
= sdata
->u
.mgd
.associated
&& !sdata
->u
.mgd
.dtim_period
;
2855 if (elems
->tim
&& !elems
->parse_error
) {
2856 const struct ieee80211_tim_ie
*tim_ie
= elems
->tim
;
2857 sdata
->u
.mgd
.dtim_period
= tim_ie
->dtim_period
;
2861 if (elems
->ds_params
)
2862 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2865 freq
= rx_status
->freq
;
2867 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2869 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2872 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2875 ieee80211_rx_bss_put(local
, bss
);
2877 if (!sdata
->u
.mgd
.associated
||
2878 !ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
))
2882 mutex_lock(&local
->iflist_mtx
);
2883 ieee80211_recalc_ps(local
, -1);
2884 mutex_unlock(&local
->iflist_mtx
);
2887 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
2893 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2894 struct sk_buff
*skb
)
2896 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2897 struct ieee80211_if_managed
*ifmgd
;
2898 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2899 size_t baselen
, len
= skb
->len
;
2900 struct ieee802_11_elems elems
;
2902 ifmgd
= &sdata
->u
.mgd
;
2904 ASSERT_MGD_MTX(ifmgd
);
2906 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2907 return; /* ignore ProbeResp to foreign address */
2909 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2913 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2916 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2918 if (ifmgd
->associated
&&
2919 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2920 ieee80211_reset_ap_probe(sdata
);
2922 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2923 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2924 /* got probe response, continue with auth */
2925 sdata_info(sdata
, "direct probe responded\n");
2926 ifmgd
->auth_data
->tries
= 0;
2927 ifmgd
->auth_data
->timeout
= jiffies
;
2928 ifmgd
->auth_data
->timeout_started
= true;
2929 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2934 * This is the canonical list of information elements we care about,
2935 * the filter code also gives us all changes to the Microsoft OUI
2936 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2938 * We implement beacon filtering in software since that means we can
2939 * avoid processing the frame here and in cfg80211, and userspace
2940 * will not be able to tell whether the hardware supports it or not.
2942 * XXX: This list needs to be dynamic -- userspace needs to be able to
2943 * add items it requires. It also needs to be able to tell us to
2944 * look out for other vendor IEs.
2946 static const u64 care_about_ies
=
2947 (1ULL << WLAN_EID_COUNTRY
) |
2948 (1ULL << WLAN_EID_ERP_INFO
) |
2949 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2950 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2951 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2952 (1ULL << WLAN_EID_HT_OPERATION
);
2954 static enum rx_mgmt_action
2955 ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2956 struct ieee80211_mgmt
*mgmt
, size_t len
,
2957 u8
*deauth_buf
, struct ieee80211_rx_status
*rx_status
)
2959 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2960 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2962 struct ieee802_11_elems elems
;
2963 struct ieee80211_local
*local
= sdata
->local
;
2964 struct ieee80211_chanctx_conf
*chanctx_conf
;
2965 struct ieee80211_channel
*chan
;
2966 struct sta_info
*sta
;
2973 lockdep_assert_held(&ifmgd
->mtx
);
2975 /* Process beacon from the current BSS */
2976 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2978 return RX_MGMT_NONE
;
2981 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2982 if (!chanctx_conf
) {
2984 return RX_MGMT_NONE
;
2987 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2989 return RX_MGMT_NONE
;
2991 chan
= chanctx_conf
->def
.chan
;
2994 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
2995 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2996 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2997 len
- baselen
, false, &elems
);
2999 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3000 ifmgd
->assoc_data
->have_beacon
= true;
3001 ifmgd
->assoc_data
->need_beacon
= false;
3002 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3003 sdata
->vif
.bss_conf
.sync_tsf
=
3004 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3005 sdata
->vif
.bss_conf
.sync_device_ts
=
3006 rx_status
->device_timestamp
;
3008 sdata
->vif
.bss_conf
.sync_dtim_count
=
3009 elems
.tim
->dtim_count
;
3011 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3013 /* continue assoc process */
3014 ifmgd
->assoc_data
->timeout
= jiffies
;
3015 ifmgd
->assoc_data
->timeout_started
= true;
3016 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3017 return RX_MGMT_NONE
;
3020 if (!ifmgd
->associated
||
3021 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3022 return RX_MGMT_NONE
;
3023 bssid
= ifmgd
->associated
->bssid
;
3025 /* Track average RSSI from the Beacon frames of the current AP */
3026 ifmgd
->last_beacon_signal
= rx_status
->signal
;
3027 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3028 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3029 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
3030 ifmgd
->last_cqm_event_signal
= 0;
3031 ifmgd
->count_beacon_signal
= 1;
3032 ifmgd
->last_ave_beacon_signal
= 0;
3034 ifmgd
->ave_beacon_signal
=
3035 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
3036 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
3037 ifmgd
->ave_beacon_signal
) / 16;
3038 ifmgd
->count_beacon_signal
++;
3041 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3042 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3043 int sig
= ifmgd
->ave_beacon_signal
;
3044 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3047 * if signal crosses either of the boundaries, invoke callback
3048 * with appropriate parameters
3050 if (sig
> ifmgd
->rssi_max_thold
&&
3051 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3052 ifmgd
->last_ave_beacon_signal
= sig
;
3053 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
3054 } else if (sig
< ifmgd
->rssi_min_thold
&&
3055 (last_sig
>= ifmgd
->rssi_max_thold
||
3057 ifmgd
->last_ave_beacon_signal
= sig
;
3058 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
3062 if (bss_conf
->cqm_rssi_thold
&&
3063 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3064 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3065 int sig
= ifmgd
->ave_beacon_signal
/ 16;
3066 int last_event
= ifmgd
->last_cqm_event_signal
;
3067 int thold
= bss_conf
->cqm_rssi_thold
;
3068 int hyst
= bss_conf
->cqm_rssi_hyst
;
3070 (last_event
== 0 || sig
< last_event
- hyst
)) {
3071 ifmgd
->last_cqm_event_signal
= sig
;
3072 ieee80211_cqm_rssi_notify(
3074 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3076 } else if (sig
> thold
&&
3077 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3078 ifmgd
->last_cqm_event_signal
= sig
;
3079 ieee80211_cqm_rssi_notify(
3081 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3086 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
3087 mlme_dbg_ratelimited(sdata
,
3088 "cancelling AP probe due to a received beacon\n");
3089 mutex_lock(&local
->mtx
);
3090 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
3091 ieee80211_run_deferred_scan(local
);
3092 mutex_unlock(&local
->mtx
);
3094 mutex_lock(&local
->iflist_mtx
);
3095 ieee80211_recalc_ps(local
, -1);
3096 mutex_unlock(&local
->iflist_mtx
);
3100 * Push the beacon loss detection into the future since
3101 * we are processing a beacon from the AP just now.
3103 ieee80211_sta_reset_beacon_monitor(sdata
);
3105 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3106 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3107 len
- baselen
, false, &elems
,
3108 care_about_ies
, ncrc
);
3110 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
3111 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
3115 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3116 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3117 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3118 ieee80211_hw_config(local
,
3119 IEEE80211_CONF_CHANGE_PS
);
3121 ieee80211_send_nullfunc(local
, sdata
, 0);
3122 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3123 local
->pspolling
= true;
3126 * Here is assumed that the driver will be
3127 * able to send ps-poll frame and receive a
3128 * response even though power save mode is
3129 * enabled, but some drivers might require
3130 * to disable power save here. This needs
3131 * to be investigated.
3133 ieee80211_send_pspoll(local
, sdata
);
3138 if (sdata
->vif
.p2p
) {
3139 struct ieee80211_p2p_noa_attr noa
= {};
3142 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3144 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3145 (u8
*) &noa
, sizeof(noa
));
3147 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3148 /* valid noa_attr and index changed */
3149 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3150 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3151 changed
|= BSS_CHANGED_P2P_PS
;
3153 * make sure we update all information, the CRC
3154 * mechanism doesn't look at P2P attributes.
3156 ifmgd
->beacon_crc_valid
= false;
3158 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3159 /* noa_attr not found and we had valid noa_attr before */
3160 sdata
->u
.mgd
.p2p_noa_index
= -1;
3161 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3162 changed
|= BSS_CHANGED_P2P_PS
;
3163 ifmgd
->beacon_crc_valid
= false;
3167 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3168 return RX_MGMT_NONE
;
3169 ifmgd
->beacon_crc
= ncrc
;
3170 ifmgd
->beacon_crc_valid
= true;
3172 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3174 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3175 elems
.wmm_param_len
))
3176 changed
|= BSS_CHANGED_QOS
;
3179 * If we haven't had a beacon before, tell the driver about the
3180 * DTIM period (and beacon timing if desired) now.
3182 if (!bss_conf
->dtim_period
) {
3183 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3185 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3187 bss_conf
->dtim_period
= 1;
3189 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3190 sdata
->vif
.bss_conf
.sync_tsf
=
3191 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3192 sdata
->vif
.bss_conf
.sync_device_ts
=
3193 rx_status
->device_timestamp
;
3195 sdata
->vif
.bss_conf
.sync_dtim_count
=
3196 elems
.tim
->dtim_count
;
3198 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3201 changed
|= BSS_CHANGED_DTIM_PERIOD
;
3204 if (elems
.erp_info
) {
3206 erp_value
= elems
.erp_info
[0];
3210 changed
|= ieee80211_handle_bss_capability(sdata
,
3211 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3212 erp_valid
, erp_value
);
3214 mutex_lock(&local
->sta_mtx
);
3215 sta
= sta_info_get(sdata
, bssid
);
3217 if (ieee80211_config_bw(sdata
, sta
, elems
.ht_operation
,
3218 elems
.vht_operation
, bssid
, &changed
)) {
3219 mutex_unlock(&local
->sta_mtx
);
3220 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3221 WLAN_REASON_DEAUTH_LEAVING
,
3223 return RX_MGMT_CFG80211_TX_DEAUTH
;
3226 if (sta
&& elems
.opmode_notif
)
3227 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3228 rx_status
->band
, true);
3229 mutex_unlock(&local
->sta_mtx
);
3231 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
3232 mgmt
->u
.probe_resp
.capab_info
&
3233 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
3234 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
3236 elems
.country_elem_len
,
3237 elems
.pwr_constr_elem
);
3239 ieee80211_bss_info_change_notify(sdata
, changed
);
3241 return RX_MGMT_NONE
;
3244 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3245 struct sk_buff
*skb
)
3247 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3248 struct ieee80211_rx_status
*rx_status
;
3249 struct ieee80211_mgmt
*mgmt
;
3250 struct cfg80211_bss
*bss
= NULL
;
3251 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
3252 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3254 struct ieee802_11_elems elems
;
3257 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3258 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3259 fc
= le16_to_cpu(mgmt
->frame_control
);
3261 mutex_lock(&ifmgd
->mtx
);
3263 switch (fc
& IEEE80211_FCTL_STYPE
) {
3264 case IEEE80211_STYPE_BEACON
:
3265 rma
= ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
3266 deauth_buf
, rx_status
);
3268 case IEEE80211_STYPE_PROBE_RESP
:
3269 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3271 case IEEE80211_STYPE_AUTH
:
3272 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3274 case IEEE80211_STYPE_DEAUTH
:
3275 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3277 case IEEE80211_STYPE_DISASSOC
:
3278 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3280 case IEEE80211_STYPE_ASSOC_RESP
:
3281 case IEEE80211_STYPE_REASSOC_RESP
:
3282 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
3284 case IEEE80211_STYPE_ACTION
:
3285 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3286 ies_len
= skb
->len
-
3287 offsetof(struct ieee80211_mgmt
,
3288 u
.action
.u
.chan_switch
.variable
);
3293 ieee802_11_parse_elems(
3294 mgmt
->u
.action
.u
.chan_switch
.variable
,
3295 ies_len
, true, &elems
);
3297 if (elems
.parse_error
)
3300 ieee80211_sta_process_chanswitch(sdata
,
3303 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3304 ies_len
= skb
->len
-
3305 offsetof(struct ieee80211_mgmt
,
3306 u
.action
.u
.ext_chan_switch
.variable
);
3311 ieee802_11_parse_elems(
3312 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3313 ies_len
, true, &elems
);
3315 if (elems
.parse_error
)
3318 /* for the handling code pretend this was also an IE */
3319 elems
.ext_chansw_ie
=
3320 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3322 ieee80211_sta_process_chanswitch(sdata
,
3328 mutex_unlock(&ifmgd
->mtx
);
3334 case RX_MGMT_CFG80211_DEAUTH
:
3335 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
3337 case RX_MGMT_CFG80211_DISASSOC
:
3338 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
3340 case RX_MGMT_CFG80211_RX_AUTH
:
3341 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
3343 case RX_MGMT_CFG80211_RX_ASSOC
:
3344 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
3346 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
3347 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
3349 case RX_MGMT_CFG80211_TX_DEAUTH
:
3350 cfg80211_send_deauth(sdata
->dev
, deauth_buf
,
3351 sizeof(deauth_buf
));
3354 WARN(1, "unexpected: %d", rma
);
3358 static void ieee80211_sta_timer(unsigned long data
)
3360 struct ieee80211_sub_if_data
*sdata
=
3361 (struct ieee80211_sub_if_data
*) data
;
3363 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3366 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3367 u8
*bssid
, u8 reason
, bool tx
)
3369 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3370 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3372 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3374 mutex_unlock(&ifmgd
->mtx
);
3377 * must be outside lock due to cfg80211,
3378 * but that's not a problem.
3380 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
3382 mutex_lock(&ifmgd
->mtx
);
3385 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3387 struct ieee80211_local
*local
= sdata
->local
;
3388 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3389 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3392 lockdep_assert_held(&ifmgd
->mtx
);
3394 if (WARN_ON_ONCE(!auth_data
))
3399 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3400 sdata_info(sdata
, "authentication with %pM timed out\n",
3401 auth_data
->bss
->bssid
);
3404 * Most likely AP is not in the range so remove the
3405 * bss struct for that AP.
3407 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3412 drv_mgd_prepare_tx(local
, sdata
);
3414 if (auth_data
->bss
->proberesp_ies
) {
3418 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3419 auth_data
->bss
->bssid
, auth_data
->tries
,
3420 IEEE80211_AUTH_MAX_TRIES
);
3422 auth_data
->expected_transaction
= 2;
3424 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3425 trans
= auth_data
->sae_trans
;
3426 status
= auth_data
->sae_status
;
3427 auth_data
->expected_transaction
= trans
;
3430 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3431 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3432 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3434 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3435 auth_data
->data
, auth_data
->data_len
,
3436 auth_data
->bss
->bssid
,
3437 auth_data
->bss
->bssid
, NULL
, 0, 0,
3442 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3443 auth_data
->bss
->bssid
, auth_data
->tries
,
3444 IEEE80211_AUTH_MAX_TRIES
);
3447 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3453 * Direct probe is sent to broadcast address as some APs
3454 * will not answer to direct packet in unassociated state.
3456 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
3457 NULL
, 0, (u32
) -1, true, 0,
3458 auth_data
->bss
->channel
, false);
3462 if (tx_flags
== 0) {
3463 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3464 ifmgd
->auth_data
->timeout_started
= true;
3465 run_again(ifmgd
, auth_data
->timeout
);
3467 auth_data
->timeout_started
= false;
3473 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3475 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3476 struct ieee80211_local
*local
= sdata
->local
;
3478 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
3480 assoc_data
->tries
++;
3481 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3482 sdata_info(sdata
, "association with %pM timed out\n",
3483 assoc_data
->bss
->bssid
);
3486 * Most likely AP is not in the range so remove the
3487 * bss struct for that AP.
3489 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3494 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3495 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3496 IEEE80211_ASSOC_MAX_TRIES
);
3497 ieee80211_send_assoc(sdata
);
3499 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3500 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3501 assoc_data
->timeout_started
= true;
3502 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
3504 assoc_data
->timeout_started
= false;
3510 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3511 __le16 fc
, bool acked
)
3513 struct ieee80211_local
*local
= sdata
->local
;
3515 sdata
->u
.mgd
.status_fc
= fc
;
3516 sdata
->u
.mgd
.status_acked
= acked
;
3517 sdata
->u
.mgd
.status_received
= true;
3519 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3522 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3524 struct ieee80211_local
*local
= sdata
->local
;
3525 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3527 mutex_lock(&ifmgd
->mtx
);
3529 if (ifmgd
->status_received
) {
3530 __le16 fc
= ifmgd
->status_fc
;
3531 bool status_acked
= ifmgd
->status_acked
;
3533 ifmgd
->status_received
= false;
3534 if (ifmgd
->auth_data
&&
3535 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3537 ifmgd
->auth_data
->timeout
=
3538 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3539 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3541 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3543 ifmgd
->auth_data
->timeout_started
= true;
3544 } else if (ifmgd
->assoc_data
&&
3545 (ieee80211_is_assoc_req(fc
) ||
3546 ieee80211_is_reassoc_req(fc
))) {
3548 ifmgd
->assoc_data
->timeout
=
3549 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3550 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3552 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3554 ifmgd
->assoc_data
->timeout_started
= true;
3558 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3559 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3560 if (ifmgd
->auth_data
->done
) {
3562 * ok ... we waited for assoc but userspace didn't,
3563 * so let's just kill the auth data
3565 ieee80211_destroy_auth_data(sdata
, false);
3566 } else if (ieee80211_probe_auth(sdata
)) {
3569 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3571 ieee80211_destroy_auth_data(sdata
, false);
3573 mutex_unlock(&ifmgd
->mtx
);
3574 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
3575 mutex_lock(&ifmgd
->mtx
);
3577 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3578 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3580 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3581 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3582 if ((ifmgd
->assoc_data
->need_beacon
&&
3583 !ifmgd
->assoc_data
->have_beacon
) ||
3584 ieee80211_do_assoc(sdata
)) {
3587 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
3589 ieee80211_destroy_assoc_data(sdata
, false);
3591 mutex_unlock(&ifmgd
->mtx
);
3592 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
3593 mutex_lock(&ifmgd
->mtx
);
3595 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3596 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3598 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
3599 IEEE80211_STA_CONNECTION_POLL
) &&
3600 ifmgd
->associated
) {
3604 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3606 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3607 max_tries
= max_nullfunc_tries
;
3609 max_tries
= max_probe_tries
;
3611 /* ACK received for nullfunc probing frame */
3612 if (!ifmgd
->probe_send_count
)
3613 ieee80211_reset_ap_probe(sdata
);
3614 else if (ifmgd
->nullfunc_failed
) {
3615 if (ifmgd
->probe_send_count
< max_tries
) {
3617 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3618 bssid
, ifmgd
->probe_send_count
,
3620 ieee80211_mgd_probe_ap_send(sdata
);
3623 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3625 ieee80211_sta_connection_lost(sdata
, bssid
,
3626 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3629 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3630 run_again(ifmgd
, ifmgd
->probe_timeout
);
3631 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3633 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3634 bssid
, probe_wait_ms
);
3635 ieee80211_sta_connection_lost(sdata
, bssid
,
3636 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3637 } else if (ifmgd
->probe_send_count
< max_tries
) {
3639 "No probe response from AP %pM after %dms, try %d/%i\n",
3640 bssid
, probe_wait_ms
,
3641 ifmgd
->probe_send_count
, max_tries
);
3642 ieee80211_mgd_probe_ap_send(sdata
);
3645 * We actually lost the connection ... or did we?
3648 wiphy_debug(local
->hw
.wiphy
,
3649 "%s: No probe response from AP %pM"
3650 " after %dms, disconnecting.\n",
3652 bssid
, probe_wait_ms
);
3654 ieee80211_sta_connection_lost(sdata
, bssid
,
3655 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3659 mutex_unlock(&ifmgd
->mtx
);
3662 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3664 struct ieee80211_sub_if_data
*sdata
=
3665 (struct ieee80211_sub_if_data
*) data
;
3666 struct ieee80211_local
*local
= sdata
->local
;
3668 if (local
->quiescing
)
3671 sdata
->u
.mgd
.connection_loss
= false;
3672 ieee80211_queue_work(&sdata
->local
->hw
,
3673 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3676 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3678 struct ieee80211_sub_if_data
*sdata
=
3679 (struct ieee80211_sub_if_data
*) data
;
3680 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3681 struct ieee80211_local
*local
= sdata
->local
;
3683 if (local
->quiescing
)
3686 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3689 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3691 struct ieee80211_sub_if_data
*sdata
=
3692 container_of(work
, struct ieee80211_sub_if_data
,
3693 u
.mgd
.monitor_work
);
3695 ieee80211_mgd_probe_ap(sdata
, false);
3698 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3702 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3703 __ieee80211_stop_poll(sdata
);
3705 /* let's probe the connection once */
3706 flags
= sdata
->local
->hw
.flags
;
3707 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3708 ieee80211_queue_work(&sdata
->local
->hw
,
3709 &sdata
->u
.mgd
.monitor_work
);
3710 /* and do all the other regular work too */
3711 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3716 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3718 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3720 mutex_lock(&ifmgd
->mtx
);
3721 if (!ifmgd
->associated
) {
3722 mutex_unlock(&ifmgd
->mtx
);
3726 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3727 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3728 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3729 ieee80211_sta_connection_lost(sdata
,
3730 ifmgd
->associated
->bssid
,
3731 WLAN_REASON_UNSPECIFIED
,
3733 mutex_unlock(&ifmgd
->mtx
);
3736 mutex_unlock(&ifmgd
->mtx
);
3740 /* interface setup */
3741 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3743 struct ieee80211_if_managed
*ifmgd
;
3745 ifmgd
= &sdata
->u
.mgd
;
3746 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3747 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3748 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3749 ieee80211_beacon_connection_loss_work
);
3750 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3751 ieee80211_csa_connection_drop_work
);
3752 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3753 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3754 (unsigned long) sdata
);
3755 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3756 (unsigned long) sdata
);
3757 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3758 (unsigned long) sdata
);
3759 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3760 (unsigned long) sdata
);
3763 ifmgd
->powersave
= sdata
->wdev
.ps
;
3764 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
3765 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
3766 ifmgd
->p2p_noa_index
= -1;
3768 mutex_init(&ifmgd
->mtx
);
3770 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3771 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3773 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3776 /* scan finished notification */
3777 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3779 struct ieee80211_sub_if_data
*sdata
;
3781 /* Restart STA timers */
3783 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3784 if (ieee80211_sdata_running(sdata
))
3785 ieee80211_restart_sta_timer(sdata
);
3790 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3791 unsigned long data
, void *dummy
)
3793 s32 latency_usec
= (s32
) data
;
3794 struct ieee80211_local
*local
=
3795 container_of(nb
, struct ieee80211_local
,
3796 network_latency_notifier
);
3798 mutex_lock(&local
->iflist_mtx
);
3799 ieee80211_recalc_ps(local
, latency_usec
);
3800 mutex_unlock(&local
->iflist_mtx
);
3805 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3806 struct cfg80211_bss
*cbss
)
3808 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3809 const u8
*ht_cap_ie
, *vht_cap_ie
;
3810 const struct ieee80211_ht_cap
*ht_cap
;
3811 const struct ieee80211_vht_cap
*vht_cap
;
3814 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3817 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3818 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3819 ht_cap
= (void *)(ht_cap_ie
+ 2);
3820 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3822 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3823 * "Tx Unequal Modulation Supported" fields.
3827 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3830 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3831 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3835 vht_cap
= (void *)(vht_cap_ie
+ 2);
3836 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3837 for (nss
= 8; nss
> 0; nss
--) {
3838 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3839 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3842 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3843 chains
= max(chains
, nss
);
3849 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3850 struct cfg80211_bss
*cbss
)
3852 struct ieee80211_local
*local
= sdata
->local
;
3853 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3854 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3855 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3856 struct ieee80211_supported_band
*sband
;
3857 struct cfg80211_chan_def chandef
;
3860 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3862 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3863 IEEE80211_STA_DISABLE_80P80MHZ
|
3864 IEEE80211_STA_DISABLE_160MHZ
);
3868 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3869 sband
->ht_cap
.ht_supported
) {
3870 const u8
*ht_oper_ie
, *ht_cap
;
3872 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3873 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3874 ht_oper
= (void *)(ht_oper_ie
+ 2);
3876 ht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3877 if (!ht_cap
|| ht_cap
[1] < sizeof(struct ieee80211_ht_cap
)) {
3878 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3883 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3884 sband
->vht_cap
.vht_supported
) {
3885 const u8
*vht_oper_ie
, *vht_cap
;
3887 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3888 WLAN_EID_VHT_OPERATION
);
3889 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3890 vht_oper
= (void *)(vht_oper_ie
+ 2);
3891 if (vht_oper
&& !ht_oper
) {
3894 "AP advertised VHT without HT, disabling both\n");
3895 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3896 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3899 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3900 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
3901 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3906 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3911 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3916 /* will change later if needed */
3917 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3920 * If this fails (possibly due to channel context sharing
3921 * on incompatible channels, e.g. 80+80 and 160 sharing the
3922 * same control channel) try to use a smaller bandwidth.
3924 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3925 IEEE80211_CHANCTX_SHARED
);
3926 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
3927 ifmgd
->flags
|= chandef_downgrade(&chandef
);
3928 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3929 IEEE80211_CHANCTX_SHARED
);
3934 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3935 struct cfg80211_bss
*cbss
, bool assoc
)
3937 struct ieee80211_local
*local
= sdata
->local
;
3938 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3939 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3940 struct sta_info
*new_sta
= NULL
;
3941 bool have_sta
= false;
3944 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3949 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3954 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3960 u32 rates
= 0, basic_rates
= 0;
3961 bool have_higher_than_11mbit
;
3962 int min_rate
= INT_MAX
, min_rate_index
= -1;
3963 struct ieee80211_supported_band
*sband
;
3964 const struct cfg80211_bss_ies
*ies
;
3966 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3968 err
= ieee80211_prep_channel(sdata
, cbss
);
3970 sta_info_free(local
, new_sta
);
3974 ieee80211_get_rates(sband
, bss
->supp_rates
,
3975 bss
->supp_rates_len
,
3976 &rates
, &basic_rates
,
3977 &have_higher_than_11mbit
,
3978 &min_rate
, &min_rate_index
);
3981 * This used to be a workaround for basic rates missing
3982 * in the association response frame. Now that we no
3983 * longer use the basic rates from there, it probably
3984 * doesn't happen any more, but keep the workaround so
3985 * in case some *other* APs are buggy in different ways
3986 * we can connect -- with a warning.
3988 if (!basic_rates
&& min_rate_index
>= 0) {
3990 "No basic rates, using min rate instead\n");
3991 basic_rates
= BIT(min_rate_index
);
3994 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3995 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3997 /* cf. IEEE 802.11 9.2.12 */
3998 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3999 have_higher_than_11mbit
)
4000 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
4002 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
4004 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
4006 /* set timing information */
4007 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
4009 ies
= rcu_dereference(cbss
->beacon_ies
);
4013 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4014 sdata
->vif
.bss_conf
.sync_device_ts
=
4015 bss
->device_ts_beacon
;
4016 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4017 ies
->data
, ies
->len
);
4018 if (tim_ie
&& tim_ie
[1] >= 2)
4019 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
4021 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4022 } else if (!(local
->hw
.flags
&
4023 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
4024 ies
= rcu_dereference(cbss
->proberesp_ies
);
4025 /* must be non-NULL since beacon IEs were NULL */
4026 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4027 sdata
->vif
.bss_conf
.sync_device_ts
=
4028 bss
->device_ts_presp
;
4029 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4031 sdata
->vif
.bss_conf
.sync_tsf
= 0;
4032 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
4033 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4037 /* tell driver about BSSID, basic rates and timing */
4038 ieee80211_bss_info_change_notify(sdata
,
4039 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
4040 BSS_CHANGED_BEACON_INT
);
4043 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
4045 err
= sta_info_insert(new_sta
);
4049 "failed to insert STA entry for the AP (error %d)\n",
4054 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4060 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4061 struct cfg80211_auth_request
*req
)
4063 struct ieee80211_local
*local
= sdata
->local
;
4064 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4065 struct ieee80211_mgd_auth_data
*auth_data
;
4069 /* prepare auth data structure */
4071 switch (req
->auth_type
) {
4072 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4073 auth_alg
= WLAN_AUTH_OPEN
;
4075 case NL80211_AUTHTYPE_SHARED_KEY
:
4076 if (IS_ERR(local
->wep_tx_tfm
))
4078 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4080 case NL80211_AUTHTYPE_FT
:
4081 auth_alg
= WLAN_AUTH_FT
;
4083 case NL80211_AUTHTYPE_NETWORK_EAP
:
4084 auth_alg
= WLAN_AUTH_LEAP
;
4086 case NL80211_AUTHTYPE_SAE
:
4087 auth_alg
= WLAN_AUTH_SAE
;
4093 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4094 req
->ie_len
, GFP_KERNEL
);
4098 auth_data
->bss
= req
->bss
;
4100 if (req
->sae_data_len
>= 4) {
4101 __le16
*pos
= (__le16
*) req
->sae_data
;
4102 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4103 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4104 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4105 req
->sae_data_len
- 4);
4106 auth_data
->data_len
+= req
->sae_data_len
- 4;
4109 if (req
->ie
&& req
->ie_len
) {
4110 memcpy(&auth_data
->data
[auth_data
->data_len
],
4111 req
->ie
, req
->ie_len
);
4112 auth_data
->data_len
+= req
->ie_len
;
4115 if (req
->key
&& req
->key_len
) {
4116 auth_data
->key_len
= req
->key_len
;
4117 auth_data
->key_idx
= req
->key_idx
;
4118 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4121 auth_data
->algorithm
= auth_alg
;
4123 /* try to authenticate/probe */
4125 mutex_lock(&ifmgd
->mtx
);
4127 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4128 ifmgd
->assoc_data
) {
4133 if (ifmgd
->auth_data
)
4134 ieee80211_destroy_auth_data(sdata
, false);
4136 /* prep auth_data so we don't go into idle on disassoc */
4137 ifmgd
->auth_data
= auth_data
;
4139 if (ifmgd
->associated
) {
4140 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4142 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4143 WLAN_REASON_UNSPECIFIED
,
4146 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4150 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4152 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
4156 err
= ieee80211_probe_auth(sdata
);
4158 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4162 /* hold our own reference */
4163 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4168 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4169 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4170 ifmgd
->auth_data
= NULL
;
4174 mutex_unlock(&ifmgd
->mtx
);
4179 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4180 struct cfg80211_assoc_request
*req
)
4182 struct ieee80211_local
*local
= sdata
->local
;
4183 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4184 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4185 struct ieee80211_mgd_assoc_data
*assoc_data
;
4186 const struct cfg80211_bss_ies
*beacon_ies
;
4187 struct ieee80211_supported_band
*sband
;
4188 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4191 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4196 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4202 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4203 assoc_data
->ssid_len
= ssidie
[1];
4206 mutex_lock(&ifmgd
->mtx
);
4208 if (ifmgd
->associated
) {
4209 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4211 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4212 WLAN_REASON_UNSPECIFIED
,
4215 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4219 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4224 if (ifmgd
->assoc_data
) {
4229 if (ifmgd
->auth_data
) {
4232 /* keep sta info, bssid if matching */
4233 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4234 ieee80211_destroy_auth_data(sdata
, match
);
4237 /* prepare assoc data */
4239 ifmgd
->beacon_crc_valid
= false;
4242 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4243 * We still associate in non-HT mode (11a/b/g) if any one of these
4244 * ciphers is configured as pairwise.
4245 * We can set this to true for non-11n hardware, that'll be checked
4246 * separately along with the peer capabilities.
4248 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4249 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4250 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4251 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4252 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4253 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4254 netdev_info(sdata
->dev
,
4255 "disabling HT/VHT due to WEP/TKIP use\n");
4259 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4260 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4261 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4264 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4265 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4267 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4268 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4269 if (!sband
->ht_cap
.ht_supported
||
4270 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4271 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4273 netdev_info(sdata
->dev
,
4274 "disabling HT as WMM/QoS is not supported by the AP\n");
4277 /* disable VHT if we don't support it or the AP doesn't use WMM */
4278 if (!sband
->vht_cap
.vht_supported
||
4279 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4280 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4282 netdev_info(sdata
->dev
,
4283 "disabling VHT as WMM/QoS is not supported by the AP\n");
4286 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4287 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4288 sizeof(ifmgd
->ht_capa_mask
));
4290 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4291 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4292 sizeof(ifmgd
->vht_capa_mask
));
4294 if (req
->ie
&& req
->ie_len
) {
4295 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4296 assoc_data
->ie_len
= req
->ie_len
;
4299 assoc_data
->bss
= req
->bss
;
4301 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4302 if (ifmgd
->powersave
)
4303 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4305 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4307 sdata
->smps_mode
= ifmgd
->req_smps
;
4309 assoc_data
->capability
= req
->bss
->capability
;
4310 assoc_data
->wmm
= bss
->wmm_used
&&
4311 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4312 assoc_data
->supp_rates
= bss
->supp_rates
;
4313 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4316 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4317 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4318 assoc_data
->ap_ht_param
=
4319 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4321 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4322 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4323 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4324 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4325 sizeof(struct ieee80211_vht_cap
));
4327 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4330 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4331 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
) &&
4332 sdata
->wmm_acm
!= 0xff) {
4333 assoc_data
->uapsd
= true;
4334 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4336 assoc_data
->uapsd
= false;
4337 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4340 if (req
->prev_bssid
)
4341 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4344 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4345 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4347 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4348 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4351 if (req
->crypto
.control_port
)
4352 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4354 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4356 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4357 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4359 /* kick off associate process */
4361 ifmgd
->assoc_data
= assoc_data
;
4362 ifmgd
->dtim_period
= 0;
4364 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4369 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4371 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4374 * Wait up to one beacon interval ...
4375 * should this be more if we miss one?
4377 sdata_info(sdata
, "waiting for beacon from %pM\n",
4379 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4380 assoc_data
->timeout_started
= true;
4381 assoc_data
->need_beacon
= true;
4382 } else if (beacon_ies
) {
4383 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4388 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4389 const struct ieee80211_tim_ie
*tim
;
4390 tim
= (void *)(tim_ie
+ 2);
4391 ifmgd
->dtim_period
= tim
->dtim_period
;
4392 dtim_count
= tim
->dtim_count
;
4394 assoc_data
->have_beacon
= true;
4395 assoc_data
->timeout
= jiffies
;
4396 assoc_data
->timeout_started
= true;
4398 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4399 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4400 sdata
->vif
.bss_conf
.sync_device_ts
=
4401 bss
->device_ts_beacon
;
4402 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4405 assoc_data
->timeout
= jiffies
;
4406 assoc_data
->timeout_started
= true;
4410 run_again(ifmgd
, assoc_data
->timeout
);
4412 if (bss
->corrupt_data
) {
4413 char *corrupt_type
= "data";
4414 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4415 if (bss
->corrupt_data
&
4416 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4417 corrupt_type
= "beacon and probe response";
4419 corrupt_type
= "beacon";
4420 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4421 corrupt_type
= "probe response";
4422 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4429 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4430 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4431 ifmgd
->assoc_data
= NULL
;
4435 mutex_unlock(&ifmgd
->mtx
);
4440 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4441 struct cfg80211_deauth_request
*req
)
4443 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4444 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4445 bool tx
= !req
->local_state_change
;
4446 bool report_frame
= false;
4448 mutex_lock(&ifmgd
->mtx
);
4451 "deauthenticating from %pM by local choice (reason=%d)\n",
4452 req
->bssid
, req
->reason_code
);
4454 if (ifmgd
->auth_data
) {
4455 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4456 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4457 IEEE80211_STYPE_DEAUTH
,
4458 req
->reason_code
, tx
,
4460 ieee80211_destroy_auth_data(sdata
, false);
4461 mutex_unlock(&ifmgd
->mtx
);
4463 report_frame
= true;
4467 if (ifmgd
->associated
&&
4468 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4469 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4470 req
->reason_code
, tx
, frame_buf
);
4471 report_frame
= true;
4473 mutex_unlock(&ifmgd
->mtx
);
4477 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4478 IEEE80211_DEAUTH_FRAME_LEN
);
4483 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4484 struct cfg80211_disassoc_request
*req
)
4486 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4488 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4490 mutex_lock(&ifmgd
->mtx
);
4493 * cfg80211 should catch this ... but it's racy since
4494 * we can receive a disassoc frame, process it, hand it
4495 * to cfg80211 while that's in a locked section already
4496 * trying to tell us that the user wants to disconnect.
4498 if (ifmgd
->associated
!= req
->bss
) {
4499 mutex_unlock(&ifmgd
->mtx
);
4504 "disassociating from %pM by local choice (reason=%d)\n",
4505 req
->bss
->bssid
, req
->reason_code
);
4507 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4508 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4509 req
->reason_code
, !req
->local_state_change
,
4511 mutex_unlock(&ifmgd
->mtx
);
4513 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
,
4514 IEEE80211_DEAUTH_FRAME_LEN
);
4519 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4521 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4524 * Make sure some work items will not run after this,
4525 * they will not do anything but might not have been
4526 * cancelled when disconnecting.
4528 cancel_work_sync(&ifmgd
->monitor_work
);
4529 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4530 cancel_work_sync(&ifmgd
->request_smps_work
);
4531 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4532 cancel_work_sync(&ifmgd
->chswitch_work
);
4534 mutex_lock(&ifmgd
->mtx
);
4535 if (ifmgd
->assoc_data
)
4536 ieee80211_destroy_assoc_data(sdata
, false);
4537 if (ifmgd
->auth_data
)
4538 ieee80211_destroy_auth_data(sdata
, false);
4539 del_timer_sync(&ifmgd
->timer
);
4540 mutex_unlock(&ifmgd
->mtx
);
4543 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4544 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4547 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4549 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4551 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4553 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);