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 #define IEEE80211_BEACON_LOSS_COUNT 7
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
65 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
71 static int probe_wait_ms
= 500;
72 module_param(probe_wait_ms
, int, 0644);
73 MODULE_PARM_DESC(probe_wait_ms
,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
82 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90 #define TMR_RUNNING_TIMER 0
91 #define TMR_RUNNING_CHANSW 1
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
;
295 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
296 ret
= IEEE80211_STA_DISABLE_VHT
;
300 vht_chandef
.chan
= channel
;
301 vht_chandef
.center_freq1
=
302 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
304 vht_chandef
.center_freq2
= 0;
306 if (vht_oper
->center_freq_seg2_idx
)
307 vht_chandef
.center_freq2
=
308 ieee80211_channel_to_frequency(
309 vht_oper
->center_freq_seg2_idx
,
312 switch (vht_oper
->chan_width
) {
313 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
314 vht_chandef
.width
= chandef
->width
;
316 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
317 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
319 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
320 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
322 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
323 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
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
;
609 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
611 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(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 if (!(ap_vht_cap
->vht_cap_info
&
635 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC
)))
636 cap
&= ~(IEEE80211_VHT_CAP_RXSTBC_1
|
637 IEEE80211_VHT_CAP_RXSTBC_3
|
638 IEEE80211_VHT_CAP_RXSTBC_4
);
640 for (i
= 0; i
< 8; i
++) {
642 u16 mask
= IEEE80211_VHT_MCS_NOT_SUPPORTED
<< shift
;
645 ap_mcs
= (le16_to_cpu(ap_vht_cap
->supp_mcs
.tx_mcs_map
) &
647 our_mcs
= (le16_to_cpu(vht_cap
.vht_mcs
.rx_mcs_map
) &
652 if (our_mcs
<= ap_mcs
)
655 case IEEE80211_VHT_MCS_NOT_SUPPORTED
:
656 vht_cap
.vht_mcs
.rx_mcs_map
&= cpu_to_le16(~mask
);
657 vht_cap
.vht_mcs
.rx_mcs_map
|=
658 cpu_to_le16(ap_mcs
<< shift
);
662 /* reserve and fill IE */
663 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
664 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
667 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
669 struct ieee80211_local
*local
= sdata
->local
;
670 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
671 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
673 struct ieee80211_mgmt
*mgmt
;
675 size_t offset
= 0, noffset
;
676 int i
, count
, rates_len
, supp_rates_len
;
678 struct ieee80211_supported_band
*sband
;
679 struct ieee80211_chanctx_conf
*chanctx_conf
;
680 struct ieee80211_channel
*chan
;
683 lockdep_assert_held(&ifmgd
->mtx
);
686 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
687 if (WARN_ON(!chanctx_conf
)) {
691 chan
= chanctx_conf
->def
.chan
;
693 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
695 if (assoc_data
->supp_rates_len
) {
697 * Get all rates supported by the device and the AP as
698 * some APs don't like getting a superset of their rates
699 * in the association request (e.g. D-Link DAP 1353 in
702 rates_len
= ieee80211_compatible_rates(assoc_data
->supp_rates
,
703 assoc_data
->supp_rates_len
,
707 * In case AP not provide any supported rates information
708 * before association, we send information element(s) with
709 * all rates that we support.
712 rates_len
= sband
->n_bitrates
;
715 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
716 sizeof(*mgmt
) + /* bit too much but doesn't matter */
717 2 + assoc_data
->ssid_len
+ /* SSID */
718 4 + rates_len
+ /* (extended) rates */
719 4 + /* power capability */
720 2 + 2 * sband
->n_channels
+ /* supported channels */
721 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
722 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
723 assoc_data
->ie_len
+ /* extra IEs */
729 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
731 capab
= WLAN_CAPABILITY_ESS
;
733 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
734 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
735 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
736 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
737 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
740 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
741 capab
|= WLAN_CAPABILITY_PRIVACY
;
743 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
744 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
745 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
747 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
749 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
750 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
751 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
753 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
755 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
756 IEEE80211_STYPE_REASSOC_REQ
);
757 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
758 mgmt
->u
.reassoc_req
.listen_interval
=
759 cpu_to_le16(local
->hw
.conf
.listen_interval
);
760 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
764 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
765 IEEE80211_STYPE_ASSOC_REQ
);
766 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
767 mgmt
->u
.assoc_req
.listen_interval
=
768 cpu_to_le16(local
->hw
.conf
.listen_interval
);
772 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
773 *pos
++ = WLAN_EID_SSID
;
774 *pos
++ = assoc_data
->ssid_len
;
775 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
777 /* add all rates which were marked to be used above */
778 supp_rates_len
= rates_len
;
779 if (supp_rates_len
> 8)
782 pos
= skb_put(skb
, supp_rates_len
+ 2);
783 *pos
++ = WLAN_EID_SUPP_RATES
;
784 *pos
++ = supp_rates_len
;
787 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
788 if (BIT(i
) & rates
) {
789 int rate
= sband
->bitrates
[i
].bitrate
;
790 *pos
++ = (u8
) (rate
/ 5);
796 if (rates_len
> count
) {
797 pos
= skb_put(skb
, rates_len
- count
+ 2);
798 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
799 *pos
++ = rates_len
- count
;
801 for (i
++; i
< sband
->n_bitrates
; i
++) {
802 if (BIT(i
) & rates
) {
803 int rate
= sband
->bitrates
[i
].bitrate
;
804 *pos
++ = (u8
) (rate
/ 5);
809 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
810 /* 1. power capabilities */
811 pos
= skb_put(skb
, 4);
812 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
814 *pos
++ = 0; /* min tx power */
815 *pos
++ = chan
->max_power
; /* max tx power */
817 /* 2. supported channels */
818 /* TODO: get this in reg domain format */
819 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
820 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
821 *pos
++ = 2 * sband
->n_channels
;
822 for (i
= 0; i
< sband
->n_channels
; i
++) {
823 *pos
++ = ieee80211_frequency_to_channel(
824 sband
->channels
[i
].center_freq
);
825 *pos
++ = 1; /* one channel in the subband*/
829 /* if present, add any custom IEs that go before HT */
830 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
831 static const u8 before_ht
[] = {
834 WLAN_EID_EXT_SUPP_RATES
,
835 WLAN_EID_PWR_CAPABILITY
,
836 WLAN_EID_SUPPORTED_CHANNELS
,
839 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
840 WLAN_EID_MOBILITY_DOMAIN
,
841 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
843 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
844 before_ht
, ARRAY_SIZE(before_ht
),
846 pos
= skb_put(skb
, noffset
- offset
);
847 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
851 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
852 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
853 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
855 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
856 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
857 sband
, chan
, sdata
->smps_mode
);
859 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
860 ieee80211_add_vht_ie(sdata
, skb
, sband
,
861 &assoc_data
->ap_vht_cap
);
863 /* if present, add any custom non-vendor IEs that go after HT */
864 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
865 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
868 pos
= skb_put(skb
, noffset
- offset
);
869 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
873 if (assoc_data
->wmm
) {
874 if (assoc_data
->uapsd
) {
875 qos_info
= ifmgd
->uapsd_queues
;
876 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
877 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
882 pos
= skb_put(skb
, 9);
883 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
884 *pos
++ = 7; /* len */
885 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
888 *pos
++ = 2; /* WME */
889 *pos
++ = 0; /* WME info */
890 *pos
++ = 1; /* WME ver */
894 /* add any remaining custom (i.e. vendor specific here) IEs */
895 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
896 noffset
= assoc_data
->ie_len
;
897 pos
= skb_put(skb
, noffset
- offset
);
898 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
901 drv_mgd_prepare_tx(local
, sdata
);
903 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
904 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
905 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
906 IEEE80211_TX_INTFL_MLME_CONN_TX
;
907 ieee80211_tx_skb(sdata
, skb
);
910 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
911 struct ieee80211_sub_if_data
*sdata
)
913 struct ieee80211_pspoll
*pspoll
;
916 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
920 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
921 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
923 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
924 ieee80211_tx_skb(sdata
, skb
);
927 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
928 struct ieee80211_sub_if_data
*sdata
,
932 struct ieee80211_hdr_3addr
*nullfunc
;
933 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
935 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
939 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
941 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
943 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
944 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
945 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
946 IEEE80211_STA_CONNECTION_POLL
))
947 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
949 ieee80211_tx_skb(sdata
, skb
);
952 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
953 struct ieee80211_sub_if_data
*sdata
)
956 struct ieee80211_hdr
*nullfunc
;
959 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
962 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
966 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
968 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
969 memset(nullfunc
, 0, 30);
970 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
971 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
972 nullfunc
->frame_control
= fc
;
973 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
974 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
975 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
976 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
978 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
979 ieee80211_tx_skb(sdata
, skb
);
982 /* spectrum management related things */
983 static void ieee80211_chswitch_work(struct work_struct
*work
)
985 struct ieee80211_sub_if_data
*sdata
=
986 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
987 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
989 if (!ieee80211_sdata_running(sdata
))
992 mutex_lock(&ifmgd
->mtx
);
993 if (!ifmgd
->associated
)
996 sdata
->local
->_oper_channel
= sdata
->local
->csa_channel
;
997 if (!sdata
->local
->ops
->channel_switch
) {
998 /* call "hw_config" only if doing sw channel switch */
999 ieee80211_hw_config(sdata
->local
,
1000 IEEE80211_CONF_CHANGE_CHANNEL
);
1002 /* update the device channel directly */
1003 sdata
->local
->hw
.conf
.channel
= sdata
->local
->_oper_channel
;
1006 /* XXX: shouldn't really modify cfg80211-owned data! */
1007 ifmgd
->associated
->channel
= sdata
->local
->_oper_channel
;
1009 /* XXX: wait for a beacon first? */
1010 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
1011 IEEE80211_QUEUE_STOP_REASON_CSA
);
1013 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
1014 mutex_unlock(&ifmgd
->mtx
);
1017 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
1019 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1020 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1022 trace_api_chswitch_done(sdata
, success
);
1025 "driver channel switch failed, disconnecting\n");
1026 ieee80211_queue_work(&sdata
->local
->hw
,
1027 &ifmgd
->csa_connection_drop_work
);
1029 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1032 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1034 static void ieee80211_chswitch_timer(unsigned long data
)
1036 struct ieee80211_sub_if_data
*sdata
=
1037 (struct ieee80211_sub_if_data
*) data
;
1038 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1040 if (sdata
->local
->quiescing
) {
1041 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
1045 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1049 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1050 const struct ieee80211_channel_sw_ie
*sw_elem
,
1051 struct ieee80211_bss
*bss
, u64 timestamp
)
1053 struct cfg80211_bss
*cbss
=
1054 container_of((void *)bss
, struct cfg80211_bss
, priv
);
1055 struct ieee80211_channel
*new_ch
;
1056 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1057 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
1058 cbss
->channel
->band
);
1059 struct ieee80211_chanctx
*chanctx
;
1061 ASSERT_MGD_MTX(ifmgd
);
1063 if (!ifmgd
->associated
)
1066 if (sdata
->local
->scanning
)
1069 /* Disregard subsequent beacons if we are already running a timer
1072 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
1075 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
1076 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
) {
1078 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1079 ifmgd
->associated
->bssid
, new_freq
);
1080 ieee80211_queue_work(&sdata
->local
->hw
,
1081 &ifmgd
->csa_connection_drop_work
);
1085 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
1087 if (sdata
->local
->use_chanctx
) {
1089 "not handling channel switch with channel contexts\n");
1090 ieee80211_queue_work(&sdata
->local
->hw
,
1091 &ifmgd
->csa_connection_drop_work
);
1095 mutex_lock(&sdata
->local
->chanctx_mtx
);
1096 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
1097 mutex_unlock(&sdata
->local
->chanctx_mtx
);
1100 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
1101 struct ieee80211_chanctx
, conf
);
1102 if (chanctx
->refcount
> 1) {
1104 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1105 ieee80211_queue_work(&sdata
->local
->hw
,
1106 &ifmgd
->csa_connection_drop_work
);
1107 mutex_unlock(&sdata
->local
->chanctx_mtx
);
1110 mutex_unlock(&sdata
->local
->chanctx_mtx
);
1112 sdata
->local
->csa_channel
= new_ch
;
1115 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
1116 IEEE80211_QUEUE_STOP_REASON_CSA
);
1118 if (sdata
->local
->ops
->channel_switch
) {
1119 /* use driver's channel switch callback */
1120 struct ieee80211_channel_switch ch_switch
= {
1121 .timestamp
= timestamp
,
1122 .block_tx
= sw_elem
->mode
,
1124 .count
= sw_elem
->count
,
1127 drv_channel_switch(sdata
->local
, &ch_switch
);
1131 /* channel switch handled in software */
1132 if (sw_elem
->count
<= 1)
1133 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1135 mod_timer(&ifmgd
->chswitch_timer
,
1136 TU_TO_EXP_TIME(sw_elem
->count
*
1137 cbss
->beacon_interval
));
1140 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1141 struct ieee80211_channel
*channel
,
1142 const u8
*country_ie
, u8 country_ie_len
,
1143 const u8
*pwr_constr_elem
)
1145 struct ieee80211_country_ie_triplet
*triplet
;
1146 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1147 int i
, chan_pwr
, chan_increment
, new_ap_level
;
1148 bool have_chan_pwr
= false;
1151 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1154 triplet
= (void *)(country_ie
+ 3);
1155 country_ie_len
-= 3;
1157 switch (channel
->band
) {
1161 case IEEE80211_BAND_2GHZ
:
1162 case IEEE80211_BAND_60GHZ
:
1165 case IEEE80211_BAND_5GHZ
:
1171 while (country_ie_len
>= 3) {
1172 u8 first_channel
= triplet
->chans
.first_channel
;
1174 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1177 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1178 if (first_channel
+ i
* chan_increment
== chan
) {
1179 have_chan_pwr
= true;
1180 chan_pwr
= triplet
->chans
.max_power
;
1189 country_ie_len
-= 3;
1195 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
1197 if (sdata
->ap_power_level
== new_ap_level
)
1201 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1202 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
1203 sdata
->u
.mgd
.bssid
);
1204 sdata
->ap_power_level
= new_ap_level
;
1205 if (__ieee80211_recalc_txpower(sdata
))
1206 return BSS_CHANGED_TXPOWER
;
1211 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1212 struct ieee80211_sub_if_data
*sdata
)
1214 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1217 * If we are scanning right now then the parameters will
1218 * take effect when scan finishes.
1220 if (local
->scanning
)
1223 if (conf
->dynamic_ps_timeout
> 0 &&
1224 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1225 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1226 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1228 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1229 ieee80211_send_nullfunc(local
, sdata
, 1);
1231 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1232 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1235 conf
->flags
|= IEEE80211_CONF_PS
;
1236 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1240 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1242 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1244 if (local
->ps_sdata
) {
1245 ieee80211_enable_ps(local
, local
->ps_sdata
);
1246 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1247 conf
->flags
&= ~IEEE80211_CONF_PS
;
1248 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1249 del_timer_sync(&local
->dynamic_ps_timer
);
1250 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1254 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1256 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1257 struct sta_info
*sta
= NULL
;
1258 bool authorized
= false;
1260 if (!mgd
->powersave
)
1266 if (!mgd
->associated
)
1269 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1270 IEEE80211_STA_CONNECTION_POLL
))
1274 sta
= sta_info_get(sdata
, mgd
->bssid
);
1276 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1282 /* need to hold RTNL or interface lock */
1283 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1285 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1289 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1290 local
->ps_sdata
= NULL
;
1294 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1295 if (!ieee80211_sdata_running(sdata
))
1297 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1298 /* If an AP vif is found, then disable PS
1299 * by setting the count to zero thereby setting
1305 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1311 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1315 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1317 beaconint_us
= ieee80211_tu_to_usec(
1318 found
->vif
.bss_conf
.beacon_int
);
1320 timeout
= local
->dynamic_ps_forced_timeout
;
1323 * Go to full PSM if the user configures a very low
1324 * latency requirement.
1325 * The 2000 second value is there for compatibility
1326 * until the PM_QOS_NETWORK_LATENCY is configured
1329 if (latency
> (1900 * USEC_PER_MSEC
) &&
1330 latency
!= (2000 * USEC_PER_SEC
))
1335 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1337 if (beaconint_us
> latency
) {
1338 local
->ps_sdata
= NULL
;
1341 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1343 /* If the TIM IE is invalid, pretend the value is 1 */
1346 else if (dtimper
> 1)
1347 maxslp
= min_t(int, dtimper
,
1348 latency
/ beaconint_us
);
1350 local
->hw
.conf
.max_sleep_period
= maxslp
;
1351 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1352 local
->ps_sdata
= found
;
1355 local
->ps_sdata
= NULL
;
1358 ieee80211_change_ps(local
);
1361 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1363 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1365 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1366 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1367 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1371 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1373 struct ieee80211_local
*local
=
1374 container_of(work
, struct ieee80211_local
,
1375 dynamic_ps_disable_work
);
1377 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1378 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1379 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1382 ieee80211_wake_queues_by_reason(&local
->hw
,
1383 IEEE80211_QUEUE_STOP_REASON_PS
);
1386 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1388 struct ieee80211_local
*local
=
1389 container_of(work
, struct ieee80211_local
,
1390 dynamic_ps_enable_work
);
1391 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1392 struct ieee80211_if_managed
*ifmgd
;
1393 unsigned long flags
;
1396 /* can only happen when PS was just disabled anyway */
1400 ifmgd
= &sdata
->u
.mgd
;
1402 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1405 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1406 /* don't enter PS if TX frames are pending */
1407 if (drv_tx_frames_pending(local
)) {
1408 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1410 local
->hw
.conf
.dynamic_ps_timeout
));
1415 * transmission can be stopped by others which leads to
1416 * dynamic_ps_timer expiry. Postpone the ps timer if it
1417 * is not the actual idle state.
1419 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1420 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1421 if (local
->queue_stop_reasons
[q
]) {
1422 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1424 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1426 local
->hw
.conf
.dynamic_ps_timeout
));
1430 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1433 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1434 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1435 netif_tx_stop_all_queues(sdata
->dev
);
1437 if (drv_tx_frames_pending(local
))
1438 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1440 local
->hw
.conf
.dynamic_ps_timeout
));
1442 ieee80211_send_nullfunc(local
, sdata
, 1);
1443 /* Flush to get the tx status of nullfunc frame */
1444 drv_flush(local
, false);
1448 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1449 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1450 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1451 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1452 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1453 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1456 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1457 netif_tx_wake_all_queues(sdata
->dev
);
1460 void ieee80211_dynamic_ps_timer(unsigned long data
)
1462 struct ieee80211_local
*local
= (void *) data
;
1464 if (local
->quiescing
|| local
->suspended
)
1467 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1470 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1472 struct delayed_work
*delayed_work
=
1473 container_of(work
, struct delayed_work
, work
);
1474 struct ieee80211_sub_if_data
*sdata
=
1475 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1476 dfs_cac_timer_work
);
1478 ieee80211_vif_release_channel(sdata
);
1480 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_FINISHED
, GFP_KERNEL
);
1484 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1485 struct ieee80211_sub_if_data
*sdata
,
1486 const u8
*wmm_param
, size_t wmm_param_len
)
1488 struct ieee80211_tx_queue_params params
;
1489 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1493 u8 uapsd_queues
= 0;
1495 if (!local
->ops
->conf_tx
)
1498 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1504 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1507 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1508 uapsd_queues
= ifmgd
->uapsd_queues
;
1510 count
= wmm_param
[6] & 0x0f;
1511 if (count
== ifmgd
->wmm_last_param_set
)
1513 ifmgd
->wmm_last_param_set
= count
;
1515 pos
= wmm_param
+ 8;
1516 left
= wmm_param_len
- 8;
1518 memset(¶ms
, 0, sizeof(params
));
1521 for (; left
>= 4; left
-= 4, pos
+= 4) {
1522 int aci
= (pos
[0] >> 5) & 0x03;
1523 int acm
= (pos
[0] >> 4) & 0x01;
1531 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1532 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1538 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1539 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1545 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1546 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1553 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1554 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1559 params
.aifs
= pos
[0] & 0x0f;
1560 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1561 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1562 params
.txop
= get_unaligned_le16(pos
+ 2);
1563 params
.uapsd
= uapsd
;
1566 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1568 params
.aifs
, params
.cw_min
, params
.cw_max
,
1569 params
.txop
, params
.uapsd
);
1570 sdata
->tx_conf
[queue
] = params
;
1571 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1573 "failed to set TX queue parameters for queue %d\n",
1577 /* enable WMM or activate new settings */
1578 sdata
->vif
.bss_conf
.qos
= true;
1582 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1584 lockdep_assert_held(&sdata
->local
->mtx
);
1586 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1587 IEEE80211_STA_BEACON_POLL
);
1588 ieee80211_run_deferred_scan(sdata
->local
);
1591 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1593 mutex_lock(&sdata
->local
->mtx
);
1594 __ieee80211_stop_poll(sdata
);
1595 mutex_unlock(&sdata
->local
->mtx
);
1598 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1599 u16 capab
, bool erp_valid
, u8 erp
)
1601 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1603 bool use_protection
;
1604 bool use_short_preamble
;
1605 bool use_short_slot
;
1608 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1609 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1611 use_protection
= false;
1612 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1615 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1616 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1617 use_short_slot
= true;
1619 if (use_protection
!= bss_conf
->use_cts_prot
) {
1620 bss_conf
->use_cts_prot
= use_protection
;
1621 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1624 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1625 bss_conf
->use_short_preamble
= use_short_preamble
;
1626 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1629 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1630 bss_conf
->use_short_slot
= use_short_slot
;
1631 changed
|= BSS_CHANGED_ERP_SLOT
;
1637 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1638 struct cfg80211_bss
*cbss
,
1639 u32 bss_info_changed
)
1641 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1642 struct ieee80211_local
*local
= sdata
->local
;
1643 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1645 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1646 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1647 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1649 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1650 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1652 sdata
->u
.mgd
.associated
= cbss
;
1653 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1655 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1657 if (sdata
->vif
.p2p
) {
1658 const struct cfg80211_bss_ies
*ies
;
1661 ies
= rcu_dereference(cbss
->ies
);
1666 ret
= cfg80211_get_p2p_attr(
1667 ies
->data
, ies
->len
,
1668 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1671 bss_conf
->p2p_oppps
= noa
[1] & 0x80;
1672 bss_conf
->p2p_ctwindow
= noa
[1] & 0x7f;
1673 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1674 sdata
->u
.mgd
.p2p_noa_index
= noa
[0];
1680 /* just to be sure */
1681 ieee80211_stop_poll(sdata
);
1683 ieee80211_led_assoc(local
, 1);
1685 if (sdata
->u
.mgd
.assoc_data
->have_beacon
) {
1687 * If the AP is buggy we may get here with no DTIM period
1688 * known, so assume it's 1 which is the only safe assumption
1689 * in that case, although if the TIM IE is broken powersave
1690 * probably just won't work at all.
1692 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1693 bss_info_changed
|= BSS_CHANGED_DTIM_PERIOD
;
1695 bss_conf
->dtim_period
= 0;
1698 bss_conf
->assoc
= 1;
1700 /* Tell the driver to monitor connection quality (if supported) */
1701 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1702 bss_conf
->cqm_rssi_thold
)
1703 bss_info_changed
|= BSS_CHANGED_CQM
;
1705 /* Enable ARP filtering */
1706 if (bss_conf
->arp_addr_cnt
)
1707 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1709 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1711 mutex_lock(&local
->iflist_mtx
);
1712 ieee80211_recalc_ps(local
, -1);
1713 mutex_unlock(&local
->iflist_mtx
);
1715 ieee80211_recalc_smps(sdata
);
1716 ieee80211_recalc_ps_vif(sdata
);
1718 netif_tx_start_all_queues(sdata
->dev
);
1719 netif_carrier_on(sdata
->dev
);
1722 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1723 u16 stype
, u16 reason
, bool tx
,
1726 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1727 struct ieee80211_local
*local
= sdata
->local
;
1730 ASSERT_MGD_MTX(ifmgd
);
1732 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1735 if (WARN_ON(!ifmgd
->associated
))
1738 ieee80211_stop_poll(sdata
);
1740 ifmgd
->associated
= NULL
;
1743 * we need to commit the associated = NULL change because the
1744 * scan code uses that to determine whether this iface should
1745 * go to/wake up from powersave or not -- and could otherwise
1746 * wake the queues erroneously.
1751 * Thus, we can only afterwards stop the queues -- to account
1752 * for the case where another CPU is finishing a scan at this
1753 * time -- we don't want the scan code to enable queues.
1756 netif_tx_stop_all_queues(sdata
->dev
);
1757 netif_carrier_off(sdata
->dev
);
1760 * if we want to get out of ps before disassoc (why?) we have
1761 * to do it before sending disassoc, as otherwise the null-packet
1764 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1765 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1766 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1768 local
->ps_sdata
= NULL
;
1770 /* disable per-vif ps */
1771 ieee80211_recalc_ps_vif(sdata
);
1773 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1775 drv_flush(local
, false);
1777 /* deauthenticate/disassociate now */
1778 if (tx
|| frame_buf
)
1779 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1780 reason
, tx
, frame_buf
);
1782 /* flush out frame */
1784 drv_flush(local
, false);
1786 /* clear bssid only after building the needed mgmt frames */
1787 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1789 /* remove AP and TDLS peers */
1790 sta_info_flush_defer(sdata
);
1792 /* finally reset all BSS / config parameters */
1793 changed
|= ieee80211_reset_erp_info(sdata
);
1795 ieee80211_led_assoc(local
, 0);
1796 changed
|= BSS_CHANGED_ASSOC
;
1797 sdata
->vif
.bss_conf
.assoc
= false;
1799 sdata
->vif
.bss_conf
.p2p_ctwindow
= 0;
1800 sdata
->vif
.bss_conf
.p2p_oppps
= false;
1802 /* on the next assoc, re-program HT parameters */
1803 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1804 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1806 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1808 del_timer_sync(&local
->dynamic_ps_timer
);
1809 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1811 /* Disable ARP filtering */
1812 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1813 changed
|= BSS_CHANGED_ARP_FILTER
;
1815 sdata
->vif
.bss_conf
.qos
= false;
1816 changed
|= BSS_CHANGED_QOS
;
1818 /* The BSSID (not really interesting) and HT changed */
1819 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1820 ieee80211_bss_info_change_notify(sdata
, changed
);
1822 /* disassociated - set to defaults now */
1823 ieee80211_set_wmm_default(sdata
, false);
1825 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1826 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1827 del_timer_sync(&sdata
->u
.mgd
.timer
);
1828 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1830 sdata
->u
.mgd
.timers_running
= 0;
1832 sdata
->vif
.bss_conf
.dtim_period
= 0;
1835 ieee80211_vif_release_channel(sdata
);
1838 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1839 struct ieee80211_hdr
*hdr
)
1842 * We can postpone the mgd.timer whenever receiving unicast frames
1843 * from AP because we know that the connection is working both ways
1844 * at that time. But multicast frames (and hence also beacons) must
1845 * be ignored here, because we need to trigger the timer during
1846 * data idle periods for sending the periodic probe request to the
1847 * AP we're connected to.
1849 if (is_multicast_ether_addr(hdr
->addr1
))
1852 ieee80211_sta_reset_conn_monitor(sdata
);
1855 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1857 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1858 struct ieee80211_local
*local
= sdata
->local
;
1860 mutex_lock(&local
->mtx
);
1861 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1862 IEEE80211_STA_CONNECTION_POLL
))) {
1863 mutex_unlock(&local
->mtx
);
1867 __ieee80211_stop_poll(sdata
);
1869 mutex_lock(&local
->iflist_mtx
);
1870 ieee80211_recalc_ps(local
, -1);
1871 mutex_unlock(&local
->iflist_mtx
);
1873 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1877 * We've received a probe response, but are not sure whether
1878 * we have or will be receiving any beacons or data, so let's
1879 * schedule the timers again, just in case.
1881 ieee80211_sta_reset_beacon_monitor(sdata
);
1883 mod_timer(&ifmgd
->conn_mon_timer
,
1884 round_jiffies_up(jiffies
+
1885 IEEE80211_CONNECTION_IDLE_TIME
));
1887 mutex_unlock(&local
->mtx
);
1890 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1891 struct ieee80211_hdr
*hdr
, bool ack
)
1893 if (!ieee80211_is_data(hdr
->frame_control
))
1896 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1897 sdata
->u
.mgd
.probe_send_count
> 0) {
1899 ieee80211_sta_reset_conn_monitor(sdata
);
1901 sdata
->u
.mgd
.nullfunc_failed
= true;
1902 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1907 ieee80211_sta_reset_conn_monitor(sdata
);
1910 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1912 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1914 u8
*dst
= ifmgd
->associated
->bssid
;
1915 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1918 * Try sending broadcast probe requests for the last three
1919 * probe requests after the first ones failed since some
1920 * buggy APs only support broadcast probe requests.
1922 if (ifmgd
->probe_send_count
>= unicast_limit
)
1926 * When the hardware reports an accurate Tx ACK status, it's
1927 * better to send a nullfunc frame instead of a probe request,
1928 * as it will kick us off the AP quickly if we aren't associated
1929 * anymore. The timeout will be reset if the frame is ACKed by
1932 ifmgd
->probe_send_count
++;
1934 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1935 ifmgd
->nullfunc_failed
= false;
1936 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1941 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1942 if (WARN_ON_ONCE(ssid
== NULL
))
1947 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1948 0, (u32
) -1, true, 0,
1949 ifmgd
->associated
->channel
, false);
1953 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1954 run_again(ifmgd
, ifmgd
->probe_timeout
);
1955 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1956 drv_flush(sdata
->local
, false);
1959 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1962 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1963 bool already
= false;
1965 if (!ieee80211_sdata_running(sdata
))
1968 mutex_lock(&ifmgd
->mtx
);
1970 if (!ifmgd
->associated
)
1973 mutex_lock(&sdata
->local
->mtx
);
1975 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1976 mutex_unlock(&sdata
->local
->mtx
);
1981 mlme_dbg_ratelimited(sdata
,
1982 "detected beacon loss from AP - probing\n");
1984 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1985 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
, GFP_KERNEL
);
1988 * The driver/our work has already reported this event or the
1989 * connection monitoring has kicked in and we have already sent
1990 * a probe request. Or maybe the AP died and the driver keeps
1991 * reporting until we disassociate...
1993 * In either case we have to ignore the current call to this
1994 * function (except for setting the correct probe reason bit)
1995 * because otherwise we would reset the timer every time and
1996 * never check whether we received a probe response!
1998 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1999 IEEE80211_STA_CONNECTION_POLL
))
2003 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
2005 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2007 mutex_unlock(&sdata
->local
->mtx
);
2012 mutex_lock(&sdata
->local
->iflist_mtx
);
2013 ieee80211_recalc_ps(sdata
->local
, -1);
2014 mutex_unlock(&sdata
->local
->iflist_mtx
);
2016 ifmgd
->probe_send_count
= 0;
2017 ieee80211_mgd_probe_ap_send(sdata
);
2019 mutex_unlock(&ifmgd
->mtx
);
2022 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2023 struct ieee80211_vif
*vif
)
2025 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2026 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2027 struct cfg80211_bss
*cbss
;
2028 struct sk_buff
*skb
;
2032 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2035 ASSERT_MGD_MTX(ifmgd
);
2037 if (ifmgd
->associated
)
2038 cbss
= ifmgd
->associated
;
2039 else if (ifmgd
->auth_data
)
2040 cbss
= ifmgd
->auth_data
->bss
;
2041 else if (ifmgd
->assoc_data
)
2042 cbss
= ifmgd
->assoc_data
->bss
;
2047 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2048 if (WARN_ON_ONCE(ssid
== NULL
))
2053 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
2054 (u32
) -1, cbss
->channel
,
2061 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2063 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2065 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2066 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2068 mutex_lock(&ifmgd
->mtx
);
2069 if (!ifmgd
->associated
) {
2070 mutex_unlock(&ifmgd
->mtx
);
2074 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2075 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2077 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
2078 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
2079 IEEE80211_QUEUE_STOP_REASON_CSA
);
2080 mutex_unlock(&ifmgd
->mtx
);
2083 * must be outside lock due to cfg80211,
2084 * but that's not a problem.
2086 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
2089 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2091 struct ieee80211_sub_if_data
*sdata
=
2092 container_of(work
, struct ieee80211_sub_if_data
,
2093 u
.mgd
.beacon_connection_loss_work
);
2094 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2095 struct sta_info
*sta
;
2097 if (ifmgd
->associated
) {
2099 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2101 sta
->beacon_loss_count
++;
2105 if (ifmgd
->connection_loss
) {
2106 sdata_info(sdata
, "Connection to AP %pM lost\n",
2108 __ieee80211_disconnect(sdata
);
2110 ieee80211_mgd_probe_ap(sdata
, true);
2114 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2116 struct ieee80211_sub_if_data
*sdata
=
2117 container_of(work
, struct ieee80211_sub_if_data
,
2118 u
.mgd
.csa_connection_drop_work
);
2120 __ieee80211_disconnect(sdata
);
2123 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2125 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2126 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2128 trace_api_beacon_loss(sdata
);
2130 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
2131 sdata
->u
.mgd
.connection_loss
= false;
2132 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2134 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2136 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2138 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2139 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2141 trace_api_connection_loss(sdata
);
2143 sdata
->u
.mgd
.connection_loss
= true;
2144 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2146 EXPORT_SYMBOL(ieee80211_connection_loss
);
2149 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2152 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2154 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2157 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2159 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2160 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2161 sdata
->u
.mgd
.flags
= 0;
2162 ieee80211_vif_release_channel(sdata
);
2165 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2167 sdata
->u
.mgd
.auth_data
= NULL
;
2170 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2171 struct ieee80211_mgmt
*mgmt
, size_t len
)
2173 struct ieee80211_local
*local
= sdata
->local
;
2174 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2176 struct ieee802_11_elems elems
;
2179 pos
= mgmt
->u
.auth
.variable
;
2180 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2181 if (!elems
.challenge
)
2183 auth_data
->expected_transaction
= 4;
2184 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2185 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2186 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2187 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2188 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2189 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2190 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2191 auth_data
->key
, auth_data
->key_len
,
2192 auth_data
->key_idx
, tx_flags
);
2195 static enum rx_mgmt_action __must_check
2196 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2197 struct ieee80211_mgmt
*mgmt
, size_t len
)
2199 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2201 u16 auth_alg
, auth_transaction
, status_code
;
2202 struct sta_info
*sta
;
2204 lockdep_assert_held(&ifmgd
->mtx
);
2207 return RX_MGMT_NONE
;
2209 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2210 return RX_MGMT_NONE
;
2212 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2214 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2215 return RX_MGMT_NONE
;
2217 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2218 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2219 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2221 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2222 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2223 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2224 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2226 ifmgd
->auth_data
->expected_transaction
);
2227 return RX_MGMT_NONE
;
2230 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2231 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2232 mgmt
->sa
, status_code
);
2233 ieee80211_destroy_auth_data(sdata
, false);
2234 return RX_MGMT_CFG80211_RX_AUTH
;
2237 switch (ifmgd
->auth_data
->algorithm
) {
2238 case WLAN_AUTH_OPEN
:
2239 case WLAN_AUTH_LEAP
:
2243 case WLAN_AUTH_SHARED_KEY
:
2244 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2245 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2246 /* need another frame */
2247 return RX_MGMT_NONE
;
2251 WARN_ONCE(1, "invalid auth alg %d",
2252 ifmgd
->auth_data
->algorithm
);
2253 return RX_MGMT_NONE
;
2256 sdata_info(sdata
, "authenticated\n");
2257 ifmgd
->auth_data
->done
= true;
2258 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2259 ifmgd
->auth_data
->timeout_started
= true;
2260 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2262 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2263 ifmgd
->auth_data
->expected_transaction
!= 2) {
2265 * Report auth frame to user space for processing since another
2266 * round of Authentication frames is still needed.
2268 return RX_MGMT_CFG80211_RX_AUTH
;
2271 /* move station state to auth */
2272 mutex_lock(&sdata
->local
->sta_mtx
);
2273 sta
= sta_info_get(sdata
, bssid
);
2275 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2278 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2279 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2282 mutex_unlock(&sdata
->local
->sta_mtx
);
2284 return RX_MGMT_CFG80211_RX_AUTH
;
2286 mutex_unlock(&sdata
->local
->sta_mtx
);
2287 /* ignore frame -- wait for timeout */
2288 return RX_MGMT_NONE
;
2292 static enum rx_mgmt_action __must_check
2293 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2294 struct ieee80211_mgmt
*mgmt
, size_t len
)
2296 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2297 const u8
*bssid
= NULL
;
2300 lockdep_assert_held(&ifmgd
->mtx
);
2303 return RX_MGMT_NONE
;
2305 if (!ifmgd
->associated
||
2306 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2307 return RX_MGMT_NONE
;
2309 bssid
= ifmgd
->associated
->bssid
;
2311 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2313 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2314 bssid
, reason_code
);
2316 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2318 return RX_MGMT_CFG80211_DEAUTH
;
2322 static enum rx_mgmt_action __must_check
2323 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2324 struct ieee80211_mgmt
*mgmt
, size_t len
)
2326 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2329 lockdep_assert_held(&ifmgd
->mtx
);
2332 return RX_MGMT_NONE
;
2334 if (!ifmgd
->associated
||
2335 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2336 return RX_MGMT_NONE
;
2338 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2340 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2341 mgmt
->sa
, reason_code
);
2343 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2345 return RX_MGMT_CFG80211_DISASSOC
;
2348 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2349 u8
*supp_rates
, unsigned int supp_rates_len
,
2350 u32
*rates
, u32
*basic_rates
,
2351 bool *have_higher_than_11mbit
,
2352 int *min_rate
, int *min_rate_index
)
2356 for (i
= 0; i
< supp_rates_len
; i
++) {
2357 int rate
= (supp_rates
[i
] & 0x7f) * 5;
2358 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2361 *have_higher_than_11mbit
= true;
2364 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2365 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2367 * Note: Even through the membership selector and the basic
2368 * rate flag share the same bit, they are not exactly
2371 if (!!(supp_rates
[i
] & 0x80) &&
2372 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2375 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2376 if (sband
->bitrates
[j
].bitrate
== rate
) {
2379 *basic_rates
|= BIT(j
);
2380 if (rate
< *min_rate
) {
2382 *min_rate_index
= j
;
2390 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2393 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2395 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
2398 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2400 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2401 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2402 sdata
->u
.mgd
.flags
= 0;
2403 ieee80211_vif_release_channel(sdata
);
2407 sdata
->u
.mgd
.assoc_data
= NULL
;
2410 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2411 struct cfg80211_bss
*cbss
,
2412 struct ieee80211_mgmt
*mgmt
, size_t len
)
2414 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2415 struct ieee80211_local
*local
= sdata
->local
;
2416 struct ieee80211_supported_band
*sband
;
2417 struct sta_info
*sta
;
2419 u16 capab_info
, aid
;
2420 struct ieee802_11_elems elems
;
2421 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2425 /* AssocResp and ReassocResp have identical structure */
2427 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2428 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2430 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2431 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2433 aid
&= ~(BIT(15) | BIT(14));
2435 ifmgd
->broken_ap
= false;
2437 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2438 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2441 ifmgd
->broken_ap
= true;
2444 pos
= mgmt
->u
.assoc_resp
.variable
;
2445 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2447 if (!elems
.supp_rates
) {
2448 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2455 * We previously checked these in the beacon/probe response, so
2456 * they should be present here. This is just a safety net.
2458 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2459 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2461 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2465 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2466 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2468 "VHT AP is missing VHT capability/operation in AssocResp\n");
2472 mutex_lock(&sdata
->local
->sta_mtx
);
2474 * station info was already allocated and inserted before
2475 * the association and should be available to us
2477 sta
= sta_info_get(sdata
, cbss
->bssid
);
2478 if (WARN_ON(!sta
)) {
2479 mutex_unlock(&sdata
->local
->sta_mtx
);
2483 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2485 /* Set up internal HT/VHT capabilities */
2486 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2487 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2488 elems
.ht_cap_elem
, sta
);
2490 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2491 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2492 elems
.vht_cap_elem
, sta
);
2495 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2496 * in their association response, so ignore that data for our own
2497 * configuration. If it changed since the last beacon, we'll get the
2498 * next beacon and update then.
2502 * If an operating mode notification IE is present, override the
2503 * NSS calculation (that would be done in rate_control_rate_init())
2504 * and use the # of streams from that element.
2506 if (elems
.opmode_notif
&&
2507 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2510 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2511 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2513 sta
->sta
.rx_nss
= nss
;
2516 rate_control_rate_init(sta
);
2518 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2519 set_sta_flag(sta
, WLAN_STA_MFP
);
2521 if (elems
.wmm_param
)
2522 set_sta_flag(sta
, WLAN_STA_WME
);
2524 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2525 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2526 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2529 "failed to move station %pM to desired state\n",
2531 WARN_ON(__sta_info_destroy(sta
));
2532 mutex_unlock(&sdata
->local
->sta_mtx
);
2536 mutex_unlock(&sdata
->local
->sta_mtx
);
2539 * Always handle WMM once after association regardless
2540 * of the first value the AP uses. Setting -1 here has
2541 * that effect because the AP values is an unsigned
2544 ifmgd
->wmm_last_param_set
= -1;
2546 if (elems
.wmm_param
)
2547 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2548 elems
.wmm_param_len
);
2550 ieee80211_set_wmm_default(sdata
, false);
2551 changed
|= BSS_CHANGED_QOS
;
2553 /* set AID and assoc capability,
2554 * ieee80211_set_associated() will tell the driver */
2555 bss_conf
->aid
= aid
;
2556 bss_conf
->assoc_capability
= capab_info
;
2557 ieee80211_set_associated(sdata
, cbss
, changed
);
2560 * If we're using 4-addr mode, let the AP know that we're
2561 * doing so, so that it can create the STA VLAN on its side
2563 if (ifmgd
->use_4addr
)
2564 ieee80211_send_4addr_nullfunc(local
, sdata
);
2567 * Start timer to probe the connection to the AP now.
2568 * Also start the timer that will detect beacon loss.
2570 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2571 ieee80211_sta_reset_beacon_monitor(sdata
);
2576 static enum rx_mgmt_action __must_check
2577 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2578 struct ieee80211_mgmt
*mgmt
, size_t len
,
2579 struct cfg80211_bss
**bss
)
2581 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2582 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2583 u16 capab_info
, status_code
, aid
;
2584 struct ieee802_11_elems elems
;
2588 lockdep_assert_held(&ifmgd
->mtx
);
2591 return RX_MGMT_NONE
;
2592 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2593 return RX_MGMT_NONE
;
2596 * AssocResp and ReassocResp have identical structure, so process both
2597 * of them in this function.
2601 return RX_MGMT_NONE
;
2603 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2604 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2605 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2606 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2609 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2610 reassoc
? "Rea" : "A", mgmt
->sa
,
2611 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2613 pos
= mgmt
->u
.assoc_resp
.variable
;
2614 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
2616 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2617 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
2618 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2620 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
2621 ms
= tu
* 1024 / 1000;
2623 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2625 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2626 assoc_data
->timeout_started
= true;
2627 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2628 run_again(ifmgd
, assoc_data
->timeout
);
2629 return RX_MGMT_NONE
;
2632 *bss
= assoc_data
->bss
;
2634 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2635 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2636 mgmt
->sa
, status_code
);
2637 ieee80211_destroy_assoc_data(sdata
, false);
2639 if (!ieee80211_assoc_success(sdata
, *bss
, mgmt
, len
)) {
2640 /* oops -- internal error -- send timeout for now */
2641 ieee80211_destroy_assoc_data(sdata
, false);
2642 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, *bss
);
2643 return RX_MGMT_CFG80211_ASSOC_TIMEOUT
;
2645 sdata_info(sdata
, "associated\n");
2648 * destroy assoc_data afterwards, as otherwise an idle
2649 * recalc after assoc_data is NULL but before associated
2650 * is set can cause the interface to go idle
2652 ieee80211_destroy_assoc_data(sdata
, true);
2655 return RX_MGMT_CFG80211_RX_ASSOC
;
2658 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2659 struct ieee80211_mgmt
*mgmt
, size_t len
,
2660 struct ieee80211_rx_status
*rx_status
,
2661 struct ieee802_11_elems
*elems
)
2663 struct ieee80211_local
*local
= sdata
->local
;
2665 struct ieee80211_bss
*bss
;
2666 struct ieee80211_channel
*channel
;
2667 bool need_ps
= false;
2669 if ((sdata
->u
.mgd
.associated
&&
2670 ether_addr_equal(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
)) ||
2671 (sdata
->u
.mgd
.assoc_data
&&
2672 ether_addr_equal(mgmt
->bssid
,
2673 sdata
->u
.mgd
.assoc_data
->bss
->bssid
))) {
2674 /* not previously set so we may need to recalc */
2675 need_ps
= sdata
->u
.mgd
.associated
&& !sdata
->u
.mgd
.dtim_period
;
2677 if (elems
->tim
&& !elems
->parse_error
) {
2678 const struct ieee80211_tim_ie
*tim_ie
= elems
->tim
;
2679 sdata
->u
.mgd
.dtim_period
= tim_ie
->dtim_period
;
2683 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
2684 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2687 freq
= rx_status
->freq
;
2689 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2691 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2694 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2697 ieee80211_rx_bss_put(local
, bss
);
2699 if (!sdata
->u
.mgd
.associated
)
2703 mutex_lock(&local
->iflist_mtx
);
2704 ieee80211_recalc_ps(local
, -1);
2705 mutex_unlock(&local
->iflist_mtx
);
2708 if (elems
->ch_switch_ie
&&
2709 memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
, ETH_ALEN
) == 0)
2710 ieee80211_sta_process_chanswitch(sdata
, elems
->ch_switch_ie
,
2711 bss
, rx_status
->mactime
);
2715 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2716 struct sk_buff
*skb
)
2718 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2719 struct ieee80211_if_managed
*ifmgd
;
2720 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2721 size_t baselen
, len
= skb
->len
;
2722 struct ieee802_11_elems elems
;
2724 ifmgd
= &sdata
->u
.mgd
;
2726 ASSERT_MGD_MTX(ifmgd
);
2728 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2729 return; /* ignore ProbeResp to foreign address */
2731 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2735 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2738 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2740 if (ifmgd
->associated
&&
2741 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2742 ieee80211_reset_ap_probe(sdata
);
2744 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2745 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2746 /* got probe response, continue with auth */
2747 sdata_info(sdata
, "direct probe responded\n");
2748 ifmgd
->auth_data
->tries
= 0;
2749 ifmgd
->auth_data
->timeout
= jiffies
;
2750 ifmgd
->auth_data
->timeout_started
= true;
2751 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
2756 * This is the canonical list of information elements we care about,
2757 * the filter code also gives us all changes to the Microsoft OUI
2758 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2760 * We implement beacon filtering in software since that means we can
2761 * avoid processing the frame here and in cfg80211, and userspace
2762 * will not be able to tell whether the hardware supports it or not.
2764 * XXX: This list needs to be dynamic -- userspace needs to be able to
2765 * add items it requires. It also needs to be able to tell us to
2766 * look out for other vendor IEs.
2768 static const u64 care_about_ies
=
2769 (1ULL << WLAN_EID_COUNTRY
) |
2770 (1ULL << WLAN_EID_ERP_INFO
) |
2771 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2772 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2773 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2774 (1ULL << WLAN_EID_HT_OPERATION
);
2776 static enum rx_mgmt_action
2777 ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2778 struct ieee80211_mgmt
*mgmt
, size_t len
,
2779 u8
*deauth_buf
, struct ieee80211_rx_status
*rx_status
)
2781 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2782 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2784 struct ieee802_11_elems elems
;
2785 struct ieee80211_local
*local
= sdata
->local
;
2786 struct ieee80211_chanctx_conf
*chanctx_conf
;
2787 struct ieee80211_channel
*chan
;
2788 struct sta_info
*sta
;
2795 lockdep_assert_held(&ifmgd
->mtx
);
2797 /* Process beacon from the current BSS */
2798 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2800 return RX_MGMT_NONE
;
2803 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2804 if (!chanctx_conf
) {
2806 return RX_MGMT_NONE
;
2809 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2811 return RX_MGMT_NONE
;
2813 chan
= chanctx_conf
->def
.chan
;
2816 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
2817 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2818 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2819 len
- baselen
, &elems
);
2821 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2822 ifmgd
->assoc_data
->have_beacon
= true;
2823 ifmgd
->assoc_data
->need_beacon
= false;
2824 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
2825 sdata
->vif
.bss_conf
.sync_tsf
=
2826 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2827 sdata
->vif
.bss_conf
.sync_device_ts
=
2828 rx_status
->device_timestamp
;
2830 sdata
->vif
.bss_conf
.sync_dtim_count
=
2831 elems
.tim
->dtim_count
;
2833 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
2835 /* continue assoc process */
2836 ifmgd
->assoc_data
->timeout
= jiffies
;
2837 ifmgd
->assoc_data
->timeout_started
= true;
2838 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
2839 return RX_MGMT_NONE
;
2842 if (!ifmgd
->associated
||
2843 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2844 return RX_MGMT_NONE
;
2845 bssid
= ifmgd
->associated
->bssid
;
2847 /* Track average RSSI from the Beacon frames of the current AP */
2848 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2849 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2850 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2851 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2852 ifmgd
->last_cqm_event_signal
= 0;
2853 ifmgd
->count_beacon_signal
= 1;
2854 ifmgd
->last_ave_beacon_signal
= 0;
2856 ifmgd
->ave_beacon_signal
=
2857 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2858 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2859 ifmgd
->ave_beacon_signal
) / 16;
2860 ifmgd
->count_beacon_signal
++;
2863 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2864 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2865 int sig
= ifmgd
->ave_beacon_signal
;
2866 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2869 * if signal crosses either of the boundaries, invoke callback
2870 * with appropriate parameters
2872 if (sig
> ifmgd
->rssi_max_thold
&&
2873 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2874 ifmgd
->last_ave_beacon_signal
= sig
;
2875 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
2876 } else if (sig
< ifmgd
->rssi_min_thold
&&
2877 (last_sig
>= ifmgd
->rssi_max_thold
||
2879 ifmgd
->last_ave_beacon_signal
= sig
;
2880 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
2884 if (bss_conf
->cqm_rssi_thold
&&
2885 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2886 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2887 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2888 int last_event
= ifmgd
->last_cqm_event_signal
;
2889 int thold
= bss_conf
->cqm_rssi_thold
;
2890 int hyst
= bss_conf
->cqm_rssi_hyst
;
2892 (last_event
== 0 || sig
< last_event
- hyst
)) {
2893 ifmgd
->last_cqm_event_signal
= sig
;
2894 ieee80211_cqm_rssi_notify(
2896 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2898 } else if (sig
> thold
&&
2899 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2900 ifmgd
->last_cqm_event_signal
= sig
;
2901 ieee80211_cqm_rssi_notify(
2903 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2908 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
2909 mlme_dbg_ratelimited(sdata
,
2910 "cancelling AP probe due to a received beacon\n");
2911 mutex_lock(&local
->mtx
);
2912 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
2913 ieee80211_run_deferred_scan(local
);
2914 mutex_unlock(&local
->mtx
);
2916 mutex_lock(&local
->iflist_mtx
);
2917 ieee80211_recalc_ps(local
, -1);
2918 mutex_unlock(&local
->iflist_mtx
);
2922 * Push the beacon loss detection into the future since
2923 * we are processing a beacon from the AP just now.
2925 ieee80211_sta_reset_beacon_monitor(sdata
);
2927 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2928 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2929 len
- baselen
, &elems
,
2930 care_about_ies
, ncrc
);
2932 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2933 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
2937 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2938 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2939 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2940 ieee80211_hw_config(local
,
2941 IEEE80211_CONF_CHANGE_PS
);
2943 ieee80211_send_nullfunc(local
, sdata
, 0);
2944 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2945 local
->pspolling
= true;
2948 * Here is assumed that the driver will be
2949 * able to send ps-poll frame and receive a
2950 * response even though power save mode is
2951 * enabled, but some drivers might require
2952 * to disable power save here. This needs
2953 * to be investigated.
2955 ieee80211_send_pspoll(local
, sdata
);
2960 if (sdata
->vif
.p2p
) {
2964 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
2966 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
2968 if (ret
>= 2 && sdata
->u
.mgd
.p2p_noa_index
!= noa
[0]) {
2969 bss_conf
->p2p_oppps
= noa
[1] & 0x80;
2970 bss_conf
->p2p_ctwindow
= noa
[1] & 0x7f;
2971 changed
|= BSS_CHANGED_P2P_PS
;
2972 sdata
->u
.mgd
.p2p_noa_index
= noa
[0];
2974 * make sure we update all information, the CRC
2975 * mechanism doesn't look at P2P attributes.
2977 ifmgd
->beacon_crc_valid
= false;
2981 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2982 return RX_MGMT_NONE
;
2983 ifmgd
->beacon_crc
= ncrc
;
2984 ifmgd
->beacon_crc_valid
= true;
2986 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2988 if (ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2989 elems
.wmm_param_len
))
2990 changed
|= BSS_CHANGED_QOS
;
2993 * If we haven't had a beacon before, tell the driver about the
2994 * DTIM period (and beacon timing if desired) now.
2996 if (!bss_conf
->dtim_period
) {
2997 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2999 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3001 bss_conf
->dtim_period
= 1;
3003 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3004 sdata
->vif
.bss_conf
.sync_tsf
=
3005 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3006 sdata
->vif
.bss_conf
.sync_device_ts
=
3007 rx_status
->device_timestamp
;
3009 sdata
->vif
.bss_conf
.sync_dtim_count
=
3010 elems
.tim
->dtim_count
;
3012 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3015 changed
|= BSS_CHANGED_DTIM_PERIOD
;
3018 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
3020 erp_value
= elems
.erp_info
[0];
3024 changed
|= ieee80211_handle_bss_capability(sdata
,
3025 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3026 erp_valid
, erp_value
);
3028 mutex_lock(&local
->sta_mtx
);
3029 sta
= sta_info_get(sdata
, bssid
);
3031 if (ieee80211_config_bw(sdata
, sta
, elems
.ht_operation
,
3032 elems
.vht_operation
, bssid
, &changed
)) {
3033 mutex_unlock(&local
->sta_mtx
);
3034 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3035 WLAN_REASON_DEAUTH_LEAVING
,
3037 return RX_MGMT_CFG80211_TX_DEAUTH
;
3040 if (sta
&& elems
.opmode_notif
)
3041 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3042 rx_status
->band
, true);
3043 mutex_unlock(&local
->sta_mtx
);
3045 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
3046 mgmt
->u
.probe_resp
.capab_info
&
3047 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
3048 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
3050 elems
.country_elem_len
,
3051 elems
.pwr_constr_elem
);
3053 ieee80211_bss_info_change_notify(sdata
, changed
);
3055 return RX_MGMT_NONE
;
3058 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3059 struct sk_buff
*skb
)
3061 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3062 struct ieee80211_rx_status
*rx_status
;
3063 struct ieee80211_mgmt
*mgmt
;
3064 struct cfg80211_bss
*bss
= NULL
;
3065 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
3066 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3069 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3070 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3071 fc
= le16_to_cpu(mgmt
->frame_control
);
3073 mutex_lock(&ifmgd
->mtx
);
3075 switch (fc
& IEEE80211_FCTL_STYPE
) {
3076 case IEEE80211_STYPE_BEACON
:
3077 rma
= ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
3078 deauth_buf
, rx_status
);
3080 case IEEE80211_STYPE_PROBE_RESP
:
3081 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3083 case IEEE80211_STYPE_AUTH
:
3084 rma
= ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3086 case IEEE80211_STYPE_DEAUTH
:
3087 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3089 case IEEE80211_STYPE_DISASSOC
:
3090 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3092 case IEEE80211_STYPE_ASSOC_RESP
:
3093 case IEEE80211_STYPE_REASSOC_RESP
:
3094 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, &bss
);
3096 case IEEE80211_STYPE_ACTION
:
3097 switch (mgmt
->u
.action
.category
) {
3098 case WLAN_CATEGORY_SPECTRUM_MGMT
:
3099 ieee80211_sta_process_chanswitch(sdata
,
3100 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
3101 (void *)ifmgd
->associated
->priv
,
3102 rx_status
->mactime
);
3106 mutex_unlock(&ifmgd
->mtx
);
3112 case RX_MGMT_CFG80211_DEAUTH
:
3113 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
3115 case RX_MGMT_CFG80211_DISASSOC
:
3116 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
3118 case RX_MGMT_CFG80211_RX_AUTH
:
3119 cfg80211_send_rx_auth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
3121 case RX_MGMT_CFG80211_RX_ASSOC
:
3122 cfg80211_send_rx_assoc(sdata
->dev
, bss
, (u8
*)mgmt
, skb
->len
);
3124 case RX_MGMT_CFG80211_ASSOC_TIMEOUT
:
3125 cfg80211_send_assoc_timeout(sdata
->dev
, mgmt
->bssid
);
3127 case RX_MGMT_CFG80211_TX_DEAUTH
:
3128 cfg80211_send_deauth(sdata
->dev
, deauth_buf
,
3129 sizeof(deauth_buf
));
3132 WARN(1, "unexpected: %d", rma
);
3136 static void ieee80211_sta_timer(unsigned long data
)
3138 struct ieee80211_sub_if_data
*sdata
=
3139 (struct ieee80211_sub_if_data
*) data
;
3140 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3141 struct ieee80211_local
*local
= sdata
->local
;
3143 if (local
->quiescing
) {
3144 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
3148 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3151 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3152 u8
*bssid
, u8 reason
, bool tx
)
3154 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3155 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3157 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3159 mutex_unlock(&ifmgd
->mtx
);
3162 * must be outside lock due to cfg80211,
3163 * but that's not a problem.
3165 cfg80211_send_deauth(sdata
->dev
, frame_buf
, IEEE80211_DEAUTH_FRAME_LEN
);
3167 mutex_lock(&ifmgd
->mtx
);
3170 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3172 struct ieee80211_local
*local
= sdata
->local
;
3173 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3174 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3177 lockdep_assert_held(&ifmgd
->mtx
);
3179 if (WARN_ON_ONCE(!auth_data
))
3182 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3183 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3184 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3188 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3189 sdata_info(sdata
, "authentication with %pM timed out\n",
3190 auth_data
->bss
->bssid
);
3193 * Most likely AP is not in the range so remove the
3194 * bss struct for that AP.
3196 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3201 drv_mgd_prepare_tx(local
, sdata
);
3203 if (auth_data
->bss
->proberesp_ies
) {
3207 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3208 auth_data
->bss
->bssid
, auth_data
->tries
,
3209 IEEE80211_AUTH_MAX_TRIES
);
3211 auth_data
->expected_transaction
= 2;
3213 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3214 trans
= auth_data
->sae_trans
;
3215 status
= auth_data
->sae_status
;
3216 auth_data
->expected_transaction
= trans
;
3219 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3220 auth_data
->data
, auth_data
->data_len
,
3221 auth_data
->bss
->bssid
,
3222 auth_data
->bss
->bssid
, NULL
, 0, 0,
3227 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3228 auth_data
->bss
->bssid
, auth_data
->tries
,
3229 IEEE80211_AUTH_MAX_TRIES
);
3232 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3238 * Direct probe is sent to broadcast address as some APs
3239 * will not answer to direct packet in unassociated state.
3241 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
3242 NULL
, 0, (u32
) -1, true, tx_flags
,
3243 auth_data
->bss
->channel
, false);
3247 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3248 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3249 ifmgd
->auth_data
->timeout_started
= true;
3250 run_again(ifmgd
, auth_data
->timeout
);
3252 auth_data
->timeout_started
= false;
3258 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3260 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3261 struct ieee80211_local
*local
= sdata
->local
;
3263 lockdep_assert_held(&sdata
->u
.mgd
.mtx
);
3265 assoc_data
->tries
++;
3266 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3267 sdata_info(sdata
, "association with %pM timed out\n",
3268 assoc_data
->bss
->bssid
);
3271 * Most likely AP is not in the range so remove the
3272 * bss struct for that AP.
3274 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3279 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3280 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3281 IEEE80211_ASSOC_MAX_TRIES
);
3282 ieee80211_send_assoc(sdata
);
3284 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3285 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3286 assoc_data
->timeout_started
= true;
3287 run_again(&sdata
->u
.mgd
, assoc_data
->timeout
);
3289 assoc_data
->timeout_started
= false;
3295 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3296 __le16 fc
, bool acked
)
3298 struct ieee80211_local
*local
= sdata
->local
;
3300 sdata
->u
.mgd
.status_fc
= fc
;
3301 sdata
->u
.mgd
.status_acked
= acked
;
3302 sdata
->u
.mgd
.status_received
= true;
3304 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3307 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3309 struct ieee80211_local
*local
= sdata
->local
;
3310 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3312 mutex_lock(&ifmgd
->mtx
);
3314 if (ifmgd
->status_received
) {
3315 __le16 fc
= ifmgd
->status_fc
;
3316 bool status_acked
= ifmgd
->status_acked
;
3318 ifmgd
->status_received
= false;
3319 if (ifmgd
->auth_data
&&
3320 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3322 ifmgd
->auth_data
->timeout
=
3323 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3324 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3326 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3328 ifmgd
->auth_data
->timeout_started
= true;
3329 } else if (ifmgd
->assoc_data
&&
3330 (ieee80211_is_assoc_req(fc
) ||
3331 ieee80211_is_reassoc_req(fc
))) {
3333 ifmgd
->assoc_data
->timeout
=
3334 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3335 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3337 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3339 ifmgd
->assoc_data
->timeout_started
= true;
3343 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3344 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3345 if (ifmgd
->auth_data
->done
) {
3347 * ok ... we waited for assoc but userspace didn't,
3348 * so let's just kill the auth data
3350 ieee80211_destroy_auth_data(sdata
, false);
3351 } else if (ieee80211_probe_auth(sdata
)) {
3354 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3356 ieee80211_destroy_auth_data(sdata
, false);
3358 mutex_unlock(&ifmgd
->mtx
);
3359 cfg80211_send_auth_timeout(sdata
->dev
, bssid
);
3360 mutex_lock(&ifmgd
->mtx
);
3362 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3363 run_again(ifmgd
, ifmgd
->auth_data
->timeout
);
3365 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3366 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3367 if ((ifmgd
->assoc_data
->need_beacon
&&
3368 !ifmgd
->assoc_data
->have_beacon
) ||
3369 ieee80211_do_assoc(sdata
)) {
3372 memcpy(bssid
, ifmgd
->assoc_data
->bss
->bssid
, ETH_ALEN
);
3374 ieee80211_destroy_assoc_data(sdata
, false);
3376 mutex_unlock(&ifmgd
->mtx
);
3377 cfg80211_send_assoc_timeout(sdata
->dev
, bssid
);
3378 mutex_lock(&ifmgd
->mtx
);
3380 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3381 run_again(ifmgd
, ifmgd
->assoc_data
->timeout
);
3383 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
3384 IEEE80211_STA_CONNECTION_POLL
) &&
3385 ifmgd
->associated
) {
3389 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3391 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3392 max_tries
= max_nullfunc_tries
;
3394 max_tries
= max_probe_tries
;
3396 /* ACK received for nullfunc probing frame */
3397 if (!ifmgd
->probe_send_count
)
3398 ieee80211_reset_ap_probe(sdata
);
3399 else if (ifmgd
->nullfunc_failed
) {
3400 if (ifmgd
->probe_send_count
< max_tries
) {
3402 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3403 bssid
, ifmgd
->probe_send_count
,
3405 ieee80211_mgd_probe_ap_send(sdata
);
3408 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3410 ieee80211_sta_connection_lost(sdata
, bssid
,
3411 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3414 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3415 run_again(ifmgd
, ifmgd
->probe_timeout
);
3416 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3418 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3419 bssid
, probe_wait_ms
);
3420 ieee80211_sta_connection_lost(sdata
, bssid
,
3421 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3422 } else if (ifmgd
->probe_send_count
< max_tries
) {
3424 "No probe response from AP %pM after %dms, try %d/%i\n",
3425 bssid
, probe_wait_ms
,
3426 ifmgd
->probe_send_count
, max_tries
);
3427 ieee80211_mgd_probe_ap_send(sdata
);
3430 * We actually lost the connection ... or did we?
3433 wiphy_debug(local
->hw
.wiphy
,
3434 "%s: No probe response from AP %pM"
3435 " after %dms, disconnecting.\n",
3437 bssid
, probe_wait_ms
);
3439 ieee80211_sta_connection_lost(sdata
, bssid
,
3440 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3444 mutex_unlock(&ifmgd
->mtx
);
3447 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3449 struct ieee80211_sub_if_data
*sdata
=
3450 (struct ieee80211_sub_if_data
*) data
;
3451 struct ieee80211_local
*local
= sdata
->local
;
3453 if (local
->quiescing
)
3456 sdata
->u
.mgd
.connection_loss
= false;
3457 ieee80211_queue_work(&sdata
->local
->hw
,
3458 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3461 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3463 struct ieee80211_sub_if_data
*sdata
=
3464 (struct ieee80211_sub_if_data
*) data
;
3465 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3466 struct ieee80211_local
*local
= sdata
->local
;
3468 if (local
->quiescing
)
3471 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3474 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3476 struct ieee80211_sub_if_data
*sdata
=
3477 container_of(work
, struct ieee80211_sub_if_data
,
3478 u
.mgd
.monitor_work
);
3480 ieee80211_mgd_probe_ap(sdata
, false);
3483 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3487 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3488 __ieee80211_stop_poll(sdata
);
3490 /* let's probe the connection once */
3491 flags
= sdata
->local
->hw
.flags
;
3492 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3493 ieee80211_queue_work(&sdata
->local
->hw
,
3494 &sdata
->u
.mgd
.monitor_work
);
3495 /* and do all the other regular work too */
3496 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3501 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
3503 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3506 * we need to use atomic bitops for the running bits
3507 * only because both timers might fire at the same
3508 * time -- the code here is properly synchronised.
3511 cancel_work_sync(&ifmgd
->request_smps_work
);
3513 cancel_work_sync(&ifmgd
->monitor_work
);
3514 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
3515 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
3516 if (del_timer_sync(&ifmgd
->timer
))
3517 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
3519 cancel_work_sync(&ifmgd
->chswitch_work
);
3520 if (del_timer_sync(&ifmgd
->chswitch_timer
))
3521 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
3523 /* these will just be re-established on connection */
3524 del_timer_sync(&ifmgd
->conn_mon_timer
);
3525 del_timer_sync(&ifmgd
->bcn_mon_timer
);
3528 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3530 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3532 mutex_lock(&ifmgd
->mtx
);
3533 if (!ifmgd
->associated
) {
3534 mutex_unlock(&ifmgd
->mtx
);
3538 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3539 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3540 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3541 ieee80211_sta_connection_lost(sdata
,
3542 ifmgd
->associated
->bssid
,
3543 WLAN_REASON_UNSPECIFIED
,
3545 mutex_unlock(&ifmgd
->mtx
);
3548 mutex_unlock(&ifmgd
->mtx
);
3550 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
3551 add_timer(&ifmgd
->timer
);
3552 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
3553 add_timer(&ifmgd
->chswitch_timer
);
3554 ieee80211_sta_reset_beacon_monitor(sdata
);
3556 mutex_lock(&sdata
->local
->mtx
);
3557 ieee80211_restart_sta_timer(sdata
);
3558 mutex_unlock(&sdata
->local
->mtx
);
3562 /* interface setup */
3563 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3565 struct ieee80211_if_managed
*ifmgd
;
3567 ifmgd
= &sdata
->u
.mgd
;
3568 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3569 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3570 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3571 ieee80211_beacon_connection_loss_work
);
3572 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3573 ieee80211_csa_connection_drop_work
);
3574 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
3575 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3576 (unsigned long) sdata
);
3577 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3578 (unsigned long) sdata
);
3579 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3580 (unsigned long) sdata
);
3581 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3582 (unsigned long) sdata
);
3585 ifmgd
->powersave
= sdata
->wdev
.ps
;
3586 ifmgd
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
3587 ifmgd
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
3589 mutex_init(&ifmgd
->mtx
);
3591 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3592 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3594 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3597 /* scan finished notification */
3598 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3600 struct ieee80211_sub_if_data
*sdata
;
3602 /* Restart STA timers */
3604 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3605 ieee80211_restart_sta_timer(sdata
);
3609 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3610 unsigned long data
, void *dummy
)
3612 s32 latency_usec
= (s32
) data
;
3613 struct ieee80211_local
*local
=
3614 container_of(nb
, struct ieee80211_local
,
3615 network_latency_notifier
);
3617 mutex_lock(&local
->iflist_mtx
);
3618 ieee80211_recalc_ps(local
, latency_usec
);
3619 mutex_unlock(&local
->iflist_mtx
);
3624 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3625 struct cfg80211_bss
*cbss
)
3627 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3628 const u8
*ht_cap_ie
, *vht_cap_ie
;
3629 const struct ieee80211_ht_cap
*ht_cap
;
3630 const struct ieee80211_vht_cap
*vht_cap
;
3633 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3636 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3637 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3638 ht_cap
= (void *)(ht_cap_ie
+ 2);
3639 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3641 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3642 * "Tx Unequal Modulation Supported" fields.
3646 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3649 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3650 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3654 vht_cap
= (void *)(vht_cap_ie
+ 2);
3655 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3656 for (nss
= 8; nss
> 0; nss
--) {
3657 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3658 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3661 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3662 chains
= max(chains
, nss
);
3668 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3669 struct cfg80211_bss
*cbss
)
3671 struct ieee80211_local
*local
= sdata
->local
;
3672 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3673 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3674 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3675 struct ieee80211_supported_band
*sband
;
3676 struct cfg80211_chan_def chandef
;
3679 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3681 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3682 IEEE80211_STA_DISABLE_80P80MHZ
|
3683 IEEE80211_STA_DISABLE_160MHZ
);
3687 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3688 sband
->ht_cap
.ht_supported
) {
3689 const u8
*ht_oper_ie
, *ht_cap
;
3691 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3692 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3693 ht_oper
= (void *)(ht_oper_ie
+ 2);
3695 ht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3696 if (!ht_cap
|| ht_cap
[1] < sizeof(struct ieee80211_ht_cap
)) {
3697 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3702 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3703 sband
->vht_cap
.vht_supported
) {
3704 const u8
*vht_oper_ie
, *vht_cap
;
3706 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3707 WLAN_EID_VHT_OPERATION
);
3708 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3709 vht_oper
= (void *)(vht_oper_ie
+ 2);
3710 if (vht_oper
&& !ht_oper
) {
3713 "AP advertised VHT without HT, disabling both\n");
3714 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3715 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3718 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3719 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
3720 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3725 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3730 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3735 /* will change later if needed */
3736 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3739 * If this fails (possibly due to channel context sharing
3740 * on incompatible channels, e.g. 80+80 and 160 sharing the
3741 * same control channel) try to use a smaller bandwidth.
3743 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3744 IEEE80211_CHANCTX_SHARED
);
3745 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
3746 ifmgd
->flags
|= chandef_downgrade(&chandef
);
3747 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3748 IEEE80211_CHANCTX_SHARED
);
3753 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3754 struct cfg80211_bss
*cbss
, bool assoc
)
3756 struct ieee80211_local
*local
= sdata
->local
;
3757 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3758 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3759 struct sta_info
*new_sta
= NULL
;
3760 bool have_sta
= false;
3763 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3768 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3773 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3779 u32 rates
= 0, basic_rates
= 0;
3780 bool have_higher_than_11mbit
;
3781 int min_rate
= INT_MAX
, min_rate_index
= -1;
3782 struct ieee80211_supported_band
*sband
;
3783 const struct cfg80211_bss_ies
*ies
;
3785 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3787 err
= ieee80211_prep_channel(sdata
, cbss
);
3789 sta_info_free(local
, new_sta
);
3793 ieee80211_get_rates(sband
, bss
->supp_rates
,
3794 bss
->supp_rates_len
,
3795 &rates
, &basic_rates
,
3796 &have_higher_than_11mbit
,
3797 &min_rate
, &min_rate_index
);
3800 * This used to be a workaround for basic rates missing
3801 * in the association response frame. Now that we no
3802 * longer use the basic rates from there, it probably
3803 * doesn't happen any more, but keep the workaround so
3804 * in case some *other* APs are buggy in different ways
3805 * we can connect -- with a warning.
3807 if (!basic_rates
&& min_rate_index
>= 0) {
3809 "No basic rates, using min rate instead\n");
3810 basic_rates
= BIT(min_rate_index
);
3813 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3814 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3816 /* cf. IEEE 802.11 9.2.12 */
3817 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3818 have_higher_than_11mbit
)
3819 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3821 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3823 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3825 /* set timing information */
3826 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3828 ies
= rcu_dereference(cbss
->beacon_ies
);
3832 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3833 sdata
->vif
.bss_conf
.sync_device_ts
=
3834 bss
->device_ts_beacon
;
3835 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
3836 ies
->data
, ies
->len
);
3837 if (tim_ie
&& tim_ie
[1] >= 2)
3838 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
3840 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3841 } else if (!(local
->hw
.flags
&
3842 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
3843 ies
= rcu_dereference(cbss
->proberesp_ies
);
3844 /* must be non-NULL since beacon IEs were NULL */
3845 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3846 sdata
->vif
.bss_conf
.sync_device_ts
=
3847 bss
->device_ts_presp
;
3848 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3850 sdata
->vif
.bss_conf
.sync_tsf
= 0;
3851 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
3852 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3856 /* tell driver about BSSID, basic rates and timing */
3857 ieee80211_bss_info_change_notify(sdata
,
3858 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3859 BSS_CHANGED_BEACON_INT
);
3862 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3864 err
= sta_info_insert(new_sta
);
3868 "failed to insert STA entry for the AP (error %d)\n",
3873 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3879 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3880 struct cfg80211_auth_request
*req
)
3882 struct ieee80211_local
*local
= sdata
->local
;
3883 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3884 struct ieee80211_mgd_auth_data
*auth_data
;
3888 /* prepare auth data structure */
3890 switch (req
->auth_type
) {
3891 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3892 auth_alg
= WLAN_AUTH_OPEN
;
3894 case NL80211_AUTHTYPE_SHARED_KEY
:
3895 if (IS_ERR(local
->wep_tx_tfm
))
3897 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3899 case NL80211_AUTHTYPE_FT
:
3900 auth_alg
= WLAN_AUTH_FT
;
3902 case NL80211_AUTHTYPE_NETWORK_EAP
:
3903 auth_alg
= WLAN_AUTH_LEAP
;
3905 case NL80211_AUTHTYPE_SAE
:
3906 auth_alg
= WLAN_AUTH_SAE
;
3912 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
3913 req
->ie_len
, GFP_KERNEL
);
3917 auth_data
->bss
= req
->bss
;
3919 if (req
->sae_data_len
>= 4) {
3920 __le16
*pos
= (__le16
*) req
->sae_data
;
3921 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
3922 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
3923 memcpy(auth_data
->data
, req
->sae_data
+ 4,
3924 req
->sae_data_len
- 4);
3925 auth_data
->data_len
+= req
->sae_data_len
- 4;
3928 if (req
->ie
&& req
->ie_len
) {
3929 memcpy(&auth_data
->data
[auth_data
->data_len
],
3930 req
->ie
, req
->ie_len
);
3931 auth_data
->data_len
+= req
->ie_len
;
3934 if (req
->key
&& req
->key_len
) {
3935 auth_data
->key_len
= req
->key_len
;
3936 auth_data
->key_idx
= req
->key_idx
;
3937 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3940 auth_data
->algorithm
= auth_alg
;
3942 /* try to authenticate/probe */
3944 mutex_lock(&ifmgd
->mtx
);
3946 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3947 ifmgd
->assoc_data
) {
3952 if (ifmgd
->auth_data
)
3953 ieee80211_destroy_auth_data(sdata
, false);
3955 /* prep auth_data so we don't go into idle on disassoc */
3956 ifmgd
->auth_data
= auth_data
;
3958 if (ifmgd
->associated
)
3959 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
3961 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3963 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3967 err
= ieee80211_probe_auth(sdata
);
3969 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3973 /* hold our own reference */
3974 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
3979 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3980 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3981 ifmgd
->auth_data
= NULL
;
3985 mutex_unlock(&ifmgd
->mtx
);
3990 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3991 struct cfg80211_assoc_request
*req
)
3993 struct ieee80211_local
*local
= sdata
->local
;
3994 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3995 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3996 struct ieee80211_mgd_assoc_data
*assoc_data
;
3997 const struct cfg80211_bss_ies
*beacon_ies
;
3998 struct ieee80211_supported_band
*sband
;
3999 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4002 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4007 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4013 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4014 assoc_data
->ssid_len
= ssidie
[1];
4017 mutex_lock(&ifmgd
->mtx
);
4019 if (ifmgd
->associated
)
4020 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
4022 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4027 if (ifmgd
->assoc_data
) {
4032 if (ifmgd
->auth_data
) {
4035 /* keep sta info, bssid if matching */
4036 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4037 ieee80211_destroy_auth_data(sdata
, match
);
4040 /* prepare assoc data */
4042 ifmgd
->beacon_crc_valid
= false;
4045 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4046 * We still associate in non-HT mode (11a/b/g) if any one of these
4047 * ciphers is configured as pairwise.
4048 * We can set this to true for non-11n hardware, that'll be checked
4049 * separately along with the peer capabilities.
4051 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4052 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4053 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4054 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4055 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4056 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4057 netdev_info(sdata
->dev
,
4058 "disabling HT/VHT due to WEP/TKIP use\n");
4062 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4063 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4064 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4067 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4068 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4069 if (!sband
->ht_cap
.ht_supported
||
4070 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4071 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4073 netdev_info(sdata
->dev
,
4074 "disabling HT as WMM/QoS is not supported by the AP\n");
4077 /* disable VHT if we don't support it or the AP doesn't use WMM */
4078 if (!sband
->vht_cap
.vht_supported
||
4079 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
) {
4080 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4082 netdev_info(sdata
->dev
,
4083 "disabling VHT as WMM/QoS is not supported by the AP\n");
4086 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4087 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4088 sizeof(ifmgd
->ht_capa_mask
));
4090 if (req
->ie
&& req
->ie_len
) {
4091 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4092 assoc_data
->ie_len
= req
->ie_len
;
4095 assoc_data
->bss
= req
->bss
;
4097 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4098 if (ifmgd
->powersave
)
4099 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4101 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4103 sdata
->smps_mode
= ifmgd
->req_smps
;
4105 assoc_data
->capability
= req
->bss
->capability
;
4106 assoc_data
->wmm
= bss
->wmm_used
&&
4107 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4108 assoc_data
->supp_rates
= bss
->supp_rates
;
4109 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4112 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4113 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4114 assoc_data
->ap_ht_param
=
4115 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4117 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4118 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4119 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4120 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4121 sizeof(struct ieee80211_vht_cap
));
4123 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4126 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4127 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
4128 assoc_data
->uapsd
= true;
4129 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4131 assoc_data
->uapsd
= false;
4132 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4135 if (req
->prev_bssid
)
4136 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4139 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4140 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4142 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4143 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4146 if (req
->crypto
.control_port
)
4147 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4149 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4151 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4152 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4154 /* kick off associate process */
4156 ifmgd
->assoc_data
= assoc_data
;
4157 ifmgd
->dtim_period
= 0;
4159 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4164 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4166 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4169 * Wait up to one beacon interval ...
4170 * should this be more if we miss one?
4172 sdata_info(sdata
, "waiting for beacon from %pM\n",
4174 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4175 assoc_data
->timeout_started
= true;
4176 assoc_data
->need_beacon
= true;
4177 } else if (beacon_ies
) {
4178 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4183 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4184 const struct ieee80211_tim_ie
*tim
;
4185 tim
= (void *)(tim_ie
+ 2);
4186 ifmgd
->dtim_period
= tim
->dtim_period
;
4187 dtim_count
= tim
->dtim_count
;
4189 assoc_data
->have_beacon
= true;
4190 assoc_data
->timeout
= jiffies
;
4191 assoc_data
->timeout_started
= true;
4193 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4194 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4195 sdata
->vif
.bss_conf
.sync_device_ts
=
4196 bss
->device_ts_beacon
;
4197 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4200 assoc_data
->timeout
= jiffies
;
4201 assoc_data
->timeout_started
= true;
4205 run_again(ifmgd
, assoc_data
->timeout
);
4207 if (bss
->corrupt_data
) {
4208 char *corrupt_type
= "data";
4209 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4210 if (bss
->corrupt_data
&
4211 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4212 corrupt_type
= "beacon and probe response";
4214 corrupt_type
= "beacon";
4215 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4216 corrupt_type
= "probe response";
4217 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4224 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4225 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4226 ifmgd
->assoc_data
= NULL
;
4230 mutex_unlock(&ifmgd
->mtx
);
4235 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4236 struct cfg80211_deauth_request
*req
)
4238 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4239 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4240 bool tx
= !req
->local_state_change
;
4241 bool sent_frame
= false;
4243 mutex_lock(&ifmgd
->mtx
);
4246 "deauthenticating from %pM by local choice (reason=%d)\n",
4247 req
->bssid
, req
->reason_code
);
4249 if (ifmgd
->auth_data
) {
4250 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4251 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4252 IEEE80211_STYPE_DEAUTH
,
4253 req
->reason_code
, tx
,
4255 ieee80211_destroy_auth_data(sdata
, false);
4256 mutex_unlock(&ifmgd
->mtx
);
4262 if (ifmgd
->associated
&&
4263 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4264 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4265 req
->reason_code
, tx
, frame_buf
);
4268 mutex_unlock(&ifmgd
->mtx
);
4272 __cfg80211_send_deauth(sdata
->dev
, frame_buf
,
4273 IEEE80211_DEAUTH_FRAME_LEN
);
4278 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4279 struct cfg80211_disassoc_request
*req
)
4281 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4283 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4285 mutex_lock(&ifmgd
->mtx
);
4288 * cfg80211 should catch this ... but it's racy since
4289 * we can receive a disassoc frame, process it, hand it
4290 * to cfg80211 while that's in a locked section already
4291 * trying to tell us that the user wants to disconnect.
4293 if (ifmgd
->associated
!= req
->bss
) {
4294 mutex_unlock(&ifmgd
->mtx
);
4299 "disassociating from %pM by local choice (reason=%d)\n",
4300 req
->bss
->bssid
, req
->reason_code
);
4302 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4303 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4304 req
->reason_code
, !req
->local_state_change
,
4306 mutex_unlock(&ifmgd
->mtx
);
4308 __cfg80211_send_disassoc(sdata
->dev
, frame_buf
,
4309 IEEE80211_DEAUTH_FRAME_LEN
);
4314 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4316 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4318 mutex_lock(&ifmgd
->mtx
);
4319 if (ifmgd
->assoc_data
)
4320 ieee80211_destroy_assoc_data(sdata
, false);
4321 if (ifmgd
->auth_data
)
4322 ieee80211_destroy_auth_data(sdata
, false);
4323 del_timer_sync(&ifmgd
->timer
);
4324 mutex_unlock(&ifmgd
->mtx
);
4327 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4328 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4331 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4333 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4335 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4337 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);