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>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/delay.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/pm_qos.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
44 static int max_nullfunc_tries
= 2;
45 module_param(max_nullfunc_tries
, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries
,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49 static int max_probe_tries
= 5;
50 module_param(max_probe_tries
, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries
,
52 "Maximum probe tries before disconnecting (reason 4).");
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
62 static int beacon_loss_count
= 7;
63 module_param(beacon_loss_count
, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count
,
65 "Number of beacon intervals before we decide beacon was lost.");
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
77 static int probe_wait_ms
= 500;
78 module_param(probe_wait_ms
, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms
,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
88 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
106 static void run_again(struct ieee80211_sub_if_data
*sdata
,
107 unsigned long timeout
)
109 sdata_assert_lock(sdata
);
111 if (!timer_pending(&sdata
->u
.mgd
.timer
) ||
112 time_before(timeout
, sdata
->u
.mgd
.timer
.expires
))
113 mod_timer(&sdata
->u
.mgd
.timer
, timeout
);
116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
118 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
121 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
124 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
125 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
130 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
132 if (unlikely(!sdata
->u
.mgd
.associated
))
135 ifmgd
->probe_send_count
= 0;
137 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
140 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
141 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
144 static int ecw2cw(int ecw
)
146 return (1 << ecw
) - 1;
150 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
151 struct ieee80211_supported_band
*sband
,
152 struct ieee80211_channel
*channel
,
153 const struct ieee80211_ht_cap
*ht_cap
,
154 const struct ieee80211_ht_operation
*ht_oper
,
155 const struct ieee80211_vht_operation
*vht_oper
,
156 struct cfg80211_chan_def
*chandef
, bool tracking
)
158 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
159 struct cfg80211_chan_def vht_chandef
;
160 struct ieee80211_sta_ht_cap sta_ht_cap
;
163 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
164 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
166 chandef
->chan
= channel
;
167 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
168 chandef
->center_freq1
= channel
->center_freq
;
169 chandef
->center_freq2
= 0;
171 if (!ht_cap
|| !ht_oper
|| !sta_ht_cap
.ht_supported
) {
172 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
176 chandef
->width
= NL80211_CHAN_WIDTH_20
;
178 if (!(ht_cap
->cap_info
&
179 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
))) {
180 ret
= IEEE80211_STA_DISABLE_40MHZ
;
181 vht_chandef
= *chandef
;
185 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
187 /* check that channel matches the right operating channel */
188 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
190 * It's possible that some APs are confused here;
191 * Netgear WNDR3700 sometimes reports 4 higher than
192 * the actual channel in association responses, but
193 * since we look at probe response/beacon data here
197 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
198 channel
->center_freq
, ht_cfreq
,
199 ht_oper
->primary_chan
, channel
->band
);
200 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
204 /* check 40 MHz support, if we have it */
205 if (sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
206 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
207 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
208 chandef
->width
= NL80211_CHAN_WIDTH_40
;
209 chandef
->center_freq1
+= 10;
211 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
212 chandef
->width
= NL80211_CHAN_WIDTH_40
;
213 chandef
->center_freq1
-= 10;
217 /* 40 MHz (and 80 MHz) must be supported for VHT */
218 ret
= IEEE80211_STA_DISABLE_VHT
;
219 /* also mark 40 MHz disabled */
220 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
224 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
225 ret
= IEEE80211_STA_DISABLE_VHT
;
229 vht_chandef
.chan
= channel
;
230 vht_chandef
.center_freq1
=
231 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
233 vht_chandef
.center_freq2
= 0;
235 switch (vht_oper
->chan_width
) {
236 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
237 vht_chandef
.width
= chandef
->width
;
238 vht_chandef
.center_freq1
= chandef
->center_freq1
;
240 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
241 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
243 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
244 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
246 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
247 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
248 vht_chandef
.center_freq2
=
249 ieee80211_channel_to_frequency(
250 vht_oper
->center_freq_seg2_idx
,
254 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
256 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
257 vht_oper
->chan_width
);
258 ret
= IEEE80211_STA_DISABLE_VHT
;
262 if (!cfg80211_chandef_valid(&vht_chandef
)) {
263 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
265 "AP VHT information is invalid, disable VHT\n");
266 ret
= IEEE80211_STA_DISABLE_VHT
;
270 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
275 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
276 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
278 "AP VHT information doesn't match HT, disable VHT\n");
279 ret
= IEEE80211_STA_DISABLE_VHT
;
283 *chandef
= vht_chandef
;
289 * When tracking the current AP, don't do any further checks if the
290 * new chandef is identical to the one we're currently using for the
291 * connection. This keeps us from playing ping-pong with regulatory,
292 * without it the following can happen (for example):
293 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
294 * - AP advertises regdom US
295 * - CRDA loads regdom US with 80 MHz prohibited (old database)
296 * - the code below detects an unsupported channel, downgrades, and
297 * we disconnect from the AP in the caller
298 * - disconnect causes CRDA to reload world regdomain and the game
300 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
302 * It seems possible that there are still scenarios with CSA or real
303 * bandwidth changes where a this could happen, but those cases are
304 * less common and wouldn't completely prevent using the AP.
307 cfg80211_chandef_identical(chandef
, &sdata
->vif
.bss_conf
.chandef
))
310 /* don't print the message below for VHT mismatch if VHT is disabled */
311 if (ret
& IEEE80211_STA_DISABLE_VHT
)
312 vht_chandef
= *chandef
;
315 * Ignore the DISABLED flag when we're already connected and only
316 * tracking the APs beacon for bandwidth changes - otherwise we
317 * might get disconnected here if we connect to an AP, update our
318 * regulatory information based on the AP's country IE and the
319 * information we have is wrong/outdated and disables the channel
320 * that we're actually using for the connection to the AP.
322 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
324 IEEE80211_CHAN_DISABLED
)) {
325 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
326 ret
= IEEE80211_STA_DISABLE_HT
|
327 IEEE80211_STA_DISABLE_VHT
;
331 ret
|= ieee80211_chandef_downgrade(chandef
);
334 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
336 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
338 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
342 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
343 struct sta_info
*sta
,
344 const struct ieee80211_ht_cap
*ht_cap
,
345 const struct ieee80211_ht_operation
*ht_oper
,
346 const struct ieee80211_vht_operation
*vht_oper
,
347 const u8
*bssid
, u32
*changed
)
349 struct ieee80211_local
*local
= sdata
->local
;
350 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
351 struct ieee80211_supported_band
*sband
;
352 struct ieee80211_channel
*chan
;
353 struct cfg80211_chan_def chandef
;
356 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
359 /* if HT was/is disabled, don't track any bandwidth changes */
360 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
363 /* don't check VHT if we associated as non-VHT station */
364 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
367 if (WARN_ON_ONCE(!sta
))
371 * if bss configuration changed store the new one -
372 * this may be applicable even if channel is identical
374 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
375 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
376 *changed
|= BSS_CHANGED_HT
;
377 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
380 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
381 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
383 /* calculate new channel (type) based on HT/VHT operation IEs */
384 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
,
385 ht_cap
, ht_oper
, vht_oper
,
389 * Downgrade the new channel if we associated with restricted
390 * capabilities. For example, if we associated as a 20 MHz STA
391 * to a 40 MHz AP (due to regulatory, capabilities or config
392 * reasons) then switching to a 40 MHz channel now won't do us
393 * any good -- we couldn't use it with the AP.
395 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
396 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
397 flags
|= ieee80211_chandef_downgrade(&chandef
);
398 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
399 chandef
.width
== NL80211_CHAN_WIDTH_160
)
400 flags
|= ieee80211_chandef_downgrade(&chandef
);
401 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
402 chandef
.width
> NL80211_CHAN_WIDTH_20
)
403 flags
|= ieee80211_chandef_downgrade(&chandef
);
405 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
409 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
410 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
411 chandef
.center_freq1
, chandef
.center_freq2
);
413 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
414 IEEE80211_STA_DISABLE_VHT
|
415 IEEE80211_STA_DISABLE_40MHZ
|
416 IEEE80211_STA_DISABLE_80P80MHZ
|
417 IEEE80211_STA_DISABLE_160MHZ
)) ||
418 !cfg80211_chandef_valid(&chandef
)) {
420 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
425 switch (chandef
.width
) {
426 case NL80211_CHAN_WIDTH_20_NOHT
:
427 case NL80211_CHAN_WIDTH_20
:
428 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
430 case NL80211_CHAN_WIDTH_40
:
431 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
433 case NL80211_CHAN_WIDTH_80
:
434 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
436 case NL80211_CHAN_WIDTH_80P80
:
437 case NL80211_CHAN_WIDTH_160
:
438 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
444 if (new_sta_bw
> sta
->cur_max_bandwidth
)
445 new_sta_bw
= sta
->cur_max_bandwidth
;
447 if (new_sta_bw
< sta
->sta
.bandwidth
) {
448 sta
->sta
.bandwidth
= new_sta_bw
;
449 rate_control_rate_update(local
, sband
, sta
,
450 IEEE80211_RC_BW_CHANGED
);
453 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
456 "AP %pM changed bandwidth to incompatible one - disconnect\n",
461 if (new_sta_bw
> sta
->sta
.bandwidth
) {
462 sta
->sta
.bandwidth
= new_sta_bw
;
463 rate_control_rate_update(local
, sband
, sta
,
464 IEEE80211_RC_BW_CHANGED
);
470 /* frame sending functions */
472 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
473 struct sk_buff
*skb
, u8 ap_ht_param
,
474 struct ieee80211_supported_band
*sband
,
475 struct ieee80211_channel
*channel
,
476 enum ieee80211_smps_mode smps
)
479 u32 flags
= channel
->flags
;
481 struct ieee80211_sta_ht_cap ht_cap
;
483 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
485 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
486 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
488 /* determine capability flags */
491 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
492 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
493 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
494 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
495 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
498 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
499 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
500 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
501 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
507 * If 40 MHz was disabled associate as though we weren't
508 * capable of 40 MHz -- some broken APs will never fall
509 * back to trying to transmit in 20 MHz.
511 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
512 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
513 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
516 /* set SM PS mode properly */
517 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
519 case IEEE80211_SMPS_AUTOMATIC
:
520 case IEEE80211_SMPS_NUM_MODES
:
522 case IEEE80211_SMPS_OFF
:
523 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
524 IEEE80211_HT_CAP_SM_PS_SHIFT
;
526 case IEEE80211_SMPS_STATIC
:
527 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
528 IEEE80211_HT_CAP_SM_PS_SHIFT
;
530 case IEEE80211_SMPS_DYNAMIC
:
531 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
532 IEEE80211_HT_CAP_SM_PS_SHIFT
;
536 /* reserve and fill IE */
537 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
538 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
541 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
543 struct ieee80211_supported_band
*sband
,
544 struct ieee80211_vht_cap
*ap_vht_cap
)
548 struct ieee80211_sta_vht_cap vht_cap
;
549 u32 mask
, ap_bf_sts
, our_bf_sts
;
551 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
553 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
554 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
556 /* determine capability flags */
559 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
560 u32 bw
= cap
& IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
562 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
563 if (bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
||
564 bw
== IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
)
565 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
568 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
569 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
570 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK
;
574 * Some APs apparently get confused if our capabilities are better
575 * than theirs, so restrict what we advertise in the assoc request.
577 if (!(ap_vht_cap
->vht_cap_info
&
578 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
579 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
581 mask
= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK
;
583 ap_bf_sts
= le32_to_cpu(ap_vht_cap
->vht_cap_info
) & mask
;
584 our_bf_sts
= cap
& mask
;
586 if (ap_bf_sts
< our_bf_sts
) {
591 /* reserve and fill IE */
592 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
593 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
596 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
598 struct ieee80211_local
*local
= sdata
->local
;
599 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
600 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
602 struct ieee80211_mgmt
*mgmt
;
604 size_t offset
= 0, noffset
;
605 int i
, count
, rates_len
, supp_rates_len
, shift
;
607 struct ieee80211_supported_band
*sband
;
608 struct ieee80211_chanctx_conf
*chanctx_conf
;
609 struct ieee80211_channel
*chan
;
610 u32 rate_flags
, rates
= 0;
612 sdata_assert_lock(sdata
);
615 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
616 if (WARN_ON(!chanctx_conf
)) {
620 chan
= chanctx_conf
->def
.chan
;
621 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
623 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
624 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
626 if (assoc_data
->supp_rates_len
) {
628 * Get all rates supported by the device and the AP as
629 * some APs don't like getting a superset of their rates
630 * in the association request (e.g. D-Link DAP 1353 in
633 rates_len
= ieee80211_parse_bitrates(&chanctx_conf
->def
, sband
,
634 assoc_data
->supp_rates
,
635 assoc_data
->supp_rates_len
,
639 * In case AP not provide any supported rates information
640 * before association, we send information element(s) with
641 * all rates that we support.
644 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
645 if ((rate_flags
& sband
->bitrates
[i
].flags
)
653 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
654 sizeof(*mgmt
) + /* bit too much but doesn't matter */
655 2 + assoc_data
->ssid_len
+ /* SSID */
656 4 + rates_len
+ /* (extended) rates */
657 4 + /* power capability */
658 2 + 2 * sband
->n_channels
+ /* supported channels */
659 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
660 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
661 assoc_data
->ie_len
+ /* extra IEs */
667 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
669 capab
= WLAN_CAPABILITY_ESS
;
671 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
672 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
673 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
674 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
675 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
678 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
679 capab
|= WLAN_CAPABILITY_PRIVACY
;
681 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
682 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
683 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
685 if (ifmgd
->flags
& IEEE80211_STA_ENABLE_RRM
)
686 capab
|= WLAN_CAPABILITY_RADIO_MEASURE
;
688 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
690 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
691 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
692 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
694 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
696 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
697 IEEE80211_STYPE_REASSOC_REQ
);
698 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
699 mgmt
->u
.reassoc_req
.listen_interval
=
700 cpu_to_le16(local
->hw
.conf
.listen_interval
);
701 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
705 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
706 IEEE80211_STYPE_ASSOC_REQ
);
707 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
708 mgmt
->u
.assoc_req
.listen_interval
=
709 cpu_to_le16(local
->hw
.conf
.listen_interval
);
713 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
714 *pos
++ = WLAN_EID_SSID
;
715 *pos
++ = assoc_data
->ssid_len
;
716 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
718 /* add all rates which were marked to be used above */
719 supp_rates_len
= rates_len
;
720 if (supp_rates_len
> 8)
723 pos
= skb_put(skb
, supp_rates_len
+ 2);
724 *pos
++ = WLAN_EID_SUPP_RATES
;
725 *pos
++ = supp_rates_len
;
728 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
729 if (BIT(i
) & rates
) {
730 int rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
738 if (rates_len
> count
) {
739 pos
= skb_put(skb
, rates_len
- count
+ 2);
740 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
741 *pos
++ = rates_len
- count
;
743 for (i
++; i
< sband
->n_bitrates
; i
++) {
744 if (BIT(i
) & rates
) {
746 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
753 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
||
754 capab
& WLAN_CAPABILITY_RADIO_MEASURE
) {
755 pos
= skb_put(skb
, 4);
756 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
758 *pos
++ = 0; /* min tx power */
760 *pos
++ = ieee80211_chandef_max_power(&chanctx_conf
->def
);
763 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
764 /* TODO: get this in reg domain format */
765 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
766 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
767 *pos
++ = 2 * sband
->n_channels
;
768 for (i
= 0; i
< sband
->n_channels
; i
++) {
769 *pos
++ = ieee80211_frequency_to_channel(
770 sband
->channels
[i
].center_freq
);
771 *pos
++ = 1; /* one channel in the subband*/
775 /* if present, add any custom IEs that go before HT */
776 if (assoc_data
->ie_len
) {
777 static const u8 before_ht
[] = {
780 WLAN_EID_EXT_SUPP_RATES
,
781 WLAN_EID_PWR_CAPABILITY
,
782 WLAN_EID_SUPPORTED_CHANNELS
,
785 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
786 WLAN_EID_MOBILITY_DOMAIN
,
787 WLAN_EID_FAST_BSS_TRANSITION
, /* reassoc only */
788 WLAN_EID_RIC_DATA
, /* reassoc only */
789 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
791 static const u8 after_ric
[] = {
792 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
793 WLAN_EID_HT_CAPABILITY
,
794 WLAN_EID_BSS_COEX_2040
,
795 WLAN_EID_EXT_CAPABILITY
,
796 WLAN_EID_QOS_TRAFFIC_CAPA
,
797 WLAN_EID_TIM_BCAST_REQ
,
798 WLAN_EID_INTERWORKING
,
799 /* 60GHz doesn't happen right now */
800 WLAN_EID_VHT_CAPABILITY
,
801 WLAN_EID_OPMODE_NOTIF
,
804 noffset
= ieee80211_ie_split_ric(assoc_data
->ie
,
807 ARRAY_SIZE(before_ht
),
809 ARRAY_SIZE(after_ric
),
811 pos
= skb_put(skb
, noffset
- offset
);
812 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
816 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
817 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
818 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
820 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
821 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
822 sband
, chan
, sdata
->smps_mode
);
824 /* if present, add any custom IEs that go before VHT */
825 if (assoc_data
->ie_len
) {
826 static const u8 before_vht
[] = {
829 WLAN_EID_EXT_SUPP_RATES
,
830 WLAN_EID_PWR_CAPABILITY
,
831 WLAN_EID_SUPPORTED_CHANNELS
,
834 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
835 WLAN_EID_MOBILITY_DOMAIN
,
836 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
837 WLAN_EID_HT_CAPABILITY
,
838 WLAN_EID_BSS_COEX_2040
,
839 WLAN_EID_EXT_CAPABILITY
,
840 WLAN_EID_QOS_TRAFFIC_CAPA
,
841 WLAN_EID_TIM_BCAST_REQ
,
842 WLAN_EID_INTERWORKING
,
845 /* RIC already taken above, so no need to handle here anymore */
846 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
847 before_vht
, ARRAY_SIZE(before_vht
),
849 pos
= skb_put(skb
, noffset
- offset
);
850 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
854 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
855 ieee80211_add_vht_ie(sdata
, skb
, sband
,
856 &assoc_data
->ap_vht_cap
);
858 /* if present, add any custom non-vendor IEs that go after HT */
859 if (assoc_data
->ie_len
) {
860 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
863 pos
= skb_put(skb
, noffset
- offset
);
864 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
868 if (assoc_data
->wmm
) {
869 if (assoc_data
->uapsd
) {
870 qos_info
= ifmgd
->uapsd_queues
;
871 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
872 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
877 pos
= ieee80211_add_wmm_info_ie(skb_put(skb
, 9), qos_info
);
880 /* add any remaining custom (i.e. vendor specific here) IEs */
881 if (assoc_data
->ie_len
) {
882 noffset
= assoc_data
->ie_len
;
883 pos
= skb_put(skb
, noffset
- offset
);
884 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
887 drv_mgd_prepare_tx(local
, sdata
);
889 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
890 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
891 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
892 IEEE80211_TX_INTFL_MLME_CONN_TX
;
893 ieee80211_tx_skb(sdata
, skb
);
896 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
897 struct ieee80211_sub_if_data
*sdata
)
899 struct ieee80211_pspoll
*pspoll
;
902 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
906 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
907 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
909 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
910 ieee80211_tx_skb(sdata
, skb
);
913 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
914 struct ieee80211_sub_if_data
*sdata
,
918 struct ieee80211_hdr_3addr
*nullfunc
;
919 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
921 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
925 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
927 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
929 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
930 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
932 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
933 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
935 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
936 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
938 ieee80211_tx_skb(sdata
, skb
);
941 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
942 struct ieee80211_sub_if_data
*sdata
)
945 struct ieee80211_hdr
*nullfunc
;
948 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
951 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
955 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
957 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
958 memset(nullfunc
, 0, 30);
959 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
960 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
961 nullfunc
->frame_control
= fc
;
962 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
963 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
964 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
965 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
967 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
968 ieee80211_tx_skb(sdata
, skb
);
971 /* spectrum management related things */
972 static void ieee80211_chswitch_work(struct work_struct
*work
)
974 struct ieee80211_sub_if_data
*sdata
=
975 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
976 struct ieee80211_local
*local
= sdata
->local
;
977 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
980 if (!ieee80211_sdata_running(sdata
))
984 mutex_lock(&local
->mtx
);
985 mutex_lock(&local
->chanctx_mtx
);
987 if (!ifmgd
->associated
)
990 if (!sdata
->vif
.csa_active
)
994 * using reservation isn't immediate as it may be deferred until later
995 * with multi-vif. once reservation is complete it will re-schedule the
996 * work with no reserved_chanctx so verify chandef to check if it
997 * completed successfully
1000 if (sdata
->reserved_chanctx
) {
1002 * with multi-vif csa driver may call ieee80211_csa_finish()
1003 * many times while waiting for other interfaces to use their
1006 if (sdata
->reserved_ready
)
1009 ret
= ieee80211_vif_use_reserved_context(sdata
);
1012 "failed to use reserved channel context, disconnecting (err=%d)\n",
1014 ieee80211_queue_work(&sdata
->local
->hw
,
1015 &ifmgd
->csa_connection_drop_work
);
1022 if (!cfg80211_chandef_identical(&sdata
->vif
.bss_conf
.chandef
,
1023 &sdata
->csa_chandef
)) {
1025 "failed to finalize channel switch, disconnecting\n");
1026 ieee80211_queue_work(&sdata
->local
->hw
,
1027 &ifmgd
->csa_connection_drop_work
);
1031 /* XXX: shouldn't really modify cfg80211-owned data! */
1032 ifmgd
->associated
->channel
= sdata
->csa_chandef
.chan
;
1034 ifmgd
->csa_waiting_bcn
= true;
1036 ieee80211_sta_reset_beacon_monitor(sdata
);
1037 ieee80211_sta_reset_conn_monitor(sdata
);
1040 mutex_unlock(&local
->chanctx_mtx
);
1041 mutex_unlock(&local
->mtx
);
1042 sdata_unlock(sdata
);
1045 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data
*sdata
)
1047 struct ieee80211_local
*local
= sdata
->local
;
1048 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1051 sdata_assert_lock(sdata
);
1053 WARN_ON(!sdata
->vif
.csa_active
);
1055 if (sdata
->csa_block_tx
) {
1056 ieee80211_wake_vif_queues(local
, sdata
,
1057 IEEE80211_QUEUE_STOP_REASON_CSA
);
1058 sdata
->csa_block_tx
= false;
1061 sdata
->vif
.csa_active
= false;
1062 ifmgd
->csa_waiting_bcn
= false;
1064 ret
= drv_post_channel_switch(sdata
);
1067 "driver post channel switch failed, disconnecting\n");
1068 ieee80211_queue_work(&local
->hw
,
1069 &ifmgd
->csa_connection_drop_work
);
1073 cfg80211_ch_switch_notify(sdata
->dev
, &sdata
->reserved_chandef
);
1076 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
1078 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1079 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1081 trace_api_chswitch_done(sdata
, success
);
1084 "driver channel switch failed, disconnecting\n");
1085 ieee80211_queue_work(&sdata
->local
->hw
,
1086 &ifmgd
->csa_connection_drop_work
);
1088 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1091 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1093 static void ieee80211_chswitch_timer(unsigned long data
)
1095 struct ieee80211_sub_if_data
*sdata
=
1096 (struct ieee80211_sub_if_data
*) data
;
1098 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1102 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1103 u64 timestamp
, u32 device_timestamp
,
1104 struct ieee802_11_elems
*elems
,
1107 struct ieee80211_local
*local
= sdata
->local
;
1108 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1109 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1110 struct ieee80211_chanctx_conf
*conf
;
1111 struct ieee80211_chanctx
*chanctx
;
1112 enum ieee80211_band current_band
;
1113 struct ieee80211_csa_ie csa_ie
;
1114 struct ieee80211_channel_switch ch_switch
;
1117 sdata_assert_lock(sdata
);
1122 if (local
->scanning
)
1125 /* disregard subsequent announcements if we are already processing */
1126 if (sdata
->vif
.csa_active
)
1129 current_band
= cbss
->channel
->band
;
1130 memset(&csa_ie
, 0, sizeof(csa_ie
));
1131 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, current_band
,
1133 ifmgd
->associated
->bssid
, &csa_ie
);
1135 ieee80211_queue_work(&local
->hw
,
1136 &ifmgd
->csa_connection_drop_work
);
1140 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
1141 IEEE80211_CHAN_DISABLED
)) {
1143 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1144 ifmgd
->associated
->bssid
,
1145 csa_ie
.chandef
.chan
->center_freq
,
1146 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
1147 csa_ie
.chandef
.center_freq2
);
1148 ieee80211_queue_work(&local
->hw
,
1149 &ifmgd
->csa_connection_drop_work
);
1153 if (cfg80211_chandef_identical(&csa_ie
.chandef
,
1154 &sdata
->vif
.bss_conf
.chandef
)) {
1155 if (ifmgd
->csa_ignored_same_chan
)
1158 "AP %pM tries to chanswitch to same channel, ignore\n",
1159 ifmgd
->associated
->bssid
);
1160 ifmgd
->csa_ignored_same_chan
= true;
1164 mutex_lock(&local
->mtx
);
1165 mutex_lock(&local
->chanctx_mtx
);
1166 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1167 lockdep_is_held(&local
->chanctx_mtx
));
1170 "no channel context assigned to vif?, disconnecting\n");
1171 ieee80211_queue_work(&local
->hw
,
1172 &ifmgd
->csa_connection_drop_work
);
1173 mutex_unlock(&local
->chanctx_mtx
);
1174 mutex_unlock(&local
->mtx
);
1178 chanctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1180 if (local
->use_chanctx
&&
1181 !(local
->hw
.flags
& IEEE80211_HW_CHANCTX_STA_CSA
)) {
1183 "driver doesn't support chan-switch with channel contexts\n");
1184 ieee80211_queue_work(&local
->hw
,
1185 &ifmgd
->csa_connection_drop_work
);
1186 mutex_unlock(&local
->chanctx_mtx
);
1187 mutex_unlock(&local
->mtx
);
1191 ch_switch
.timestamp
= timestamp
;
1192 ch_switch
.device_timestamp
= device_timestamp
;
1193 ch_switch
.block_tx
= csa_ie
.mode
;
1194 ch_switch
.chandef
= csa_ie
.chandef
;
1195 ch_switch
.count
= csa_ie
.count
;
1197 if (drv_pre_channel_switch(sdata
, &ch_switch
)) {
1199 "preparing for channel switch failed, disconnecting\n");
1200 ieee80211_queue_work(&local
->hw
,
1201 &ifmgd
->csa_connection_drop_work
);
1202 mutex_unlock(&local
->chanctx_mtx
);
1203 mutex_unlock(&local
->mtx
);
1207 res
= ieee80211_vif_reserve_chanctx(sdata
, &csa_ie
.chandef
,
1208 chanctx
->mode
, false);
1211 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1213 ieee80211_queue_work(&local
->hw
,
1214 &ifmgd
->csa_connection_drop_work
);
1215 mutex_unlock(&local
->chanctx_mtx
);
1216 mutex_unlock(&local
->mtx
);
1219 mutex_unlock(&local
->chanctx_mtx
);
1221 sdata
->vif
.csa_active
= true;
1222 sdata
->csa_chandef
= csa_ie
.chandef
;
1223 sdata
->csa_block_tx
= csa_ie
.mode
;
1224 ifmgd
->csa_ignored_same_chan
= false;
1226 if (sdata
->csa_block_tx
)
1227 ieee80211_stop_vif_queues(local
, sdata
,
1228 IEEE80211_QUEUE_STOP_REASON_CSA
);
1229 mutex_unlock(&local
->mtx
);
1231 cfg80211_ch_switch_started_notify(sdata
->dev
, &csa_ie
.chandef
,
1234 if (local
->ops
->channel_switch
) {
1235 /* use driver's channel switch callback */
1236 drv_channel_switch(local
, sdata
, &ch_switch
);
1240 /* channel switch handled in software */
1241 if (csa_ie
.count
<= 1)
1242 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1244 mod_timer(&ifmgd
->chswitch_timer
,
1245 TU_TO_EXP_TIME((csa_ie
.count
- 1) *
1246 cbss
->beacon_interval
));
1250 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1251 struct ieee80211_channel
*channel
,
1252 const u8
*country_ie
, u8 country_ie_len
,
1253 const u8
*pwr_constr_elem
,
1254 int *chan_pwr
, int *pwr_reduction
)
1256 struct ieee80211_country_ie_triplet
*triplet
;
1257 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1258 int i
, chan_increment
;
1259 bool have_chan_pwr
= false;
1262 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1265 triplet
= (void *)(country_ie
+ 3);
1266 country_ie_len
-= 3;
1268 switch (channel
->band
) {
1272 case IEEE80211_BAND_2GHZ
:
1273 case IEEE80211_BAND_60GHZ
:
1276 case IEEE80211_BAND_5GHZ
:
1282 while (country_ie_len
>= 3) {
1283 u8 first_channel
= triplet
->chans
.first_channel
;
1285 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1288 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1289 if (first_channel
+ i
* chan_increment
== chan
) {
1290 have_chan_pwr
= true;
1291 *chan_pwr
= triplet
->chans
.max_power
;
1300 country_ie_len
-= 3;
1303 if (have_chan_pwr
&& pwr_constr_elem
)
1304 *pwr_reduction
= *pwr_constr_elem
;
1308 return have_chan_pwr
;
1311 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data
*sdata
,
1312 struct ieee80211_channel
*channel
,
1313 const u8
*cisco_dtpc_ie
,
1316 /* From practical testing, the first data byte of the DTPC element
1317 * seems to contain the requested dBm level, and the CLI on Cisco
1318 * APs clearly state the range is -127 to 127 dBm, which indicates
1319 * a signed byte, although it seemingly never actually goes negative.
1320 * The other byte seems to always be zero.
1322 *pwr_level
= (__s8
)cisco_dtpc_ie
[4];
1325 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1326 struct ieee80211_channel
*channel
,
1327 struct ieee80211_mgmt
*mgmt
,
1328 const u8
*country_ie
, u8 country_ie_len
,
1329 const u8
*pwr_constr_ie
,
1330 const u8
*cisco_dtpc_ie
)
1332 bool has_80211h_pwr
= false, has_cisco_pwr
= false;
1333 int chan_pwr
= 0, pwr_reduction_80211h
= 0;
1334 int pwr_level_cisco
, pwr_level_80211h
;
1336 __le16 capab
= mgmt
->u
.probe_resp
.capab_info
;
1339 (capab
& cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
) ||
1340 capab
& cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE
))) {
1341 has_80211h_pwr
= ieee80211_find_80211h_pwr_constr(
1342 sdata
, channel
, country_ie
, country_ie_len
,
1343 pwr_constr_ie
, &chan_pwr
, &pwr_reduction_80211h
);
1345 max_t(int, 0, chan_pwr
- pwr_reduction_80211h
);
1348 if (cisco_dtpc_ie
) {
1349 ieee80211_find_cisco_dtpc(
1350 sdata
, channel
, cisco_dtpc_ie
, &pwr_level_cisco
);
1351 has_cisco_pwr
= true;
1354 if (!has_80211h_pwr
&& !has_cisco_pwr
)
1357 /* If we have both 802.11h and Cisco DTPC, apply both limits
1358 * by picking the smallest of the two power levels advertised.
1360 if (has_80211h_pwr
&&
1361 (!has_cisco_pwr
|| pwr_level_80211h
<= pwr_level_cisco
)) {
1363 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1364 pwr_level_80211h
, chan_pwr
, pwr_reduction_80211h
,
1365 sdata
->u
.mgd
.bssid
);
1366 new_ap_level
= pwr_level_80211h
;
1367 } else { /* has_cisco_pwr is always true here. */
1369 "Limiting TX power to %d dBm as advertised by %pM\n",
1370 pwr_level_cisco
, sdata
->u
.mgd
.bssid
);
1371 new_ap_level
= pwr_level_cisco
;
1374 if (sdata
->ap_power_level
== new_ap_level
)
1377 sdata
->ap_power_level
= new_ap_level
;
1378 if (__ieee80211_recalc_txpower(sdata
))
1379 return BSS_CHANGED_TXPOWER
;
1384 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1385 struct ieee80211_sub_if_data
*sdata
)
1387 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1390 * If we are scanning right now then the parameters will
1391 * take effect when scan finishes.
1393 if (local
->scanning
)
1396 if (conf
->dynamic_ps_timeout
> 0 &&
1397 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1398 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1399 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1401 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1402 ieee80211_send_nullfunc(local
, sdata
, 1);
1404 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1405 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1408 conf
->flags
|= IEEE80211_CONF_PS
;
1409 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1413 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1415 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1417 if (local
->ps_sdata
) {
1418 ieee80211_enable_ps(local
, local
->ps_sdata
);
1419 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1420 conf
->flags
&= ~IEEE80211_CONF_PS
;
1421 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1422 del_timer_sync(&local
->dynamic_ps_timer
);
1423 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1427 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1429 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1430 struct sta_info
*sta
= NULL
;
1431 bool authorized
= false;
1433 if (!mgd
->powersave
)
1439 if (!mgd
->associated
)
1442 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1445 if (!mgd
->have_beacon
)
1449 sta
= sta_info_get(sdata
, mgd
->bssid
);
1451 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1457 /* need to hold RTNL or interface lock */
1458 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1460 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1464 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1465 local
->ps_sdata
= NULL
;
1469 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1470 if (!ieee80211_sdata_running(sdata
))
1472 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1473 /* If an AP vif is found, then disable PS
1474 * by setting the count to zero thereby setting
1480 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1486 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1490 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1492 beaconint_us
= ieee80211_tu_to_usec(
1493 found
->vif
.bss_conf
.beacon_int
);
1495 timeout
= local
->dynamic_ps_forced_timeout
;
1498 * Go to full PSM if the user configures a very low
1499 * latency requirement.
1500 * The 2000 second value is there for compatibility
1501 * until the PM_QOS_NETWORK_LATENCY is configured
1504 if (latency
> (1900 * USEC_PER_MSEC
) &&
1505 latency
!= (2000 * USEC_PER_SEC
))
1510 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1512 if (beaconint_us
> latency
) {
1513 local
->ps_sdata
= NULL
;
1516 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1518 /* If the TIM IE is invalid, pretend the value is 1 */
1521 else if (dtimper
> 1)
1522 maxslp
= min_t(int, dtimper
,
1523 latency
/ beaconint_us
);
1525 local
->hw
.conf
.max_sleep_period
= maxslp
;
1526 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1527 local
->ps_sdata
= found
;
1530 local
->ps_sdata
= NULL
;
1533 ieee80211_change_ps(local
);
1536 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1538 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1540 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1541 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1542 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1546 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1548 struct ieee80211_local
*local
=
1549 container_of(work
, struct ieee80211_local
,
1550 dynamic_ps_disable_work
);
1552 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1553 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1554 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1557 ieee80211_wake_queues_by_reason(&local
->hw
,
1558 IEEE80211_MAX_QUEUE_MAP
,
1559 IEEE80211_QUEUE_STOP_REASON_PS
,
1563 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1565 struct ieee80211_local
*local
=
1566 container_of(work
, struct ieee80211_local
,
1567 dynamic_ps_enable_work
);
1568 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1569 struct ieee80211_if_managed
*ifmgd
;
1570 unsigned long flags
;
1573 /* can only happen when PS was just disabled anyway */
1577 ifmgd
= &sdata
->u
.mgd
;
1579 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1582 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1583 /* don't enter PS if TX frames are pending */
1584 if (drv_tx_frames_pending(local
)) {
1585 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1587 local
->hw
.conf
.dynamic_ps_timeout
));
1592 * transmission can be stopped by others which leads to
1593 * dynamic_ps_timer expiry. Postpone the ps timer if it
1594 * is not the actual idle state.
1596 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1597 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1598 if (local
->queue_stop_reasons
[q
]) {
1599 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1601 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1603 local
->hw
.conf
.dynamic_ps_timeout
));
1607 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1610 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1611 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1612 if (drv_tx_frames_pending(local
)) {
1613 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1615 local
->hw
.conf
.dynamic_ps_timeout
));
1617 ieee80211_send_nullfunc(local
, sdata
, 1);
1618 /* Flush to get the tx status of nullfunc frame */
1619 ieee80211_flush_queues(local
, sdata
, false);
1623 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1624 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1625 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1626 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1627 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1628 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1632 void ieee80211_dynamic_ps_timer(unsigned long data
)
1634 struct ieee80211_local
*local
= (void *) data
;
1636 if (local
->quiescing
|| local
->suspended
)
1639 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1642 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1644 struct delayed_work
*delayed_work
=
1645 container_of(work
, struct delayed_work
, work
);
1646 struct ieee80211_sub_if_data
*sdata
=
1647 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1648 dfs_cac_timer_work
);
1649 struct cfg80211_chan_def chandef
= sdata
->vif
.bss_conf
.chandef
;
1651 mutex_lock(&sdata
->local
->mtx
);
1652 if (sdata
->wdev
.cac_started
) {
1653 ieee80211_vif_release_channel(sdata
);
1654 cfg80211_cac_event(sdata
->dev
, &chandef
,
1655 NL80211_RADAR_CAC_FINISHED
,
1658 mutex_unlock(&sdata
->local
->mtx
);
1662 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1664 struct ieee80211_local
*local
= sdata
->local
;
1665 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1669 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1672 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1673 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
1675 unsigned long now
= jiffies
;
1677 if (tx_tspec
->action
== TX_TSPEC_ACTION_NONE
&&
1678 tx_tspec
->admitted_time
&&
1679 time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1680 tx_tspec
->consumed_tx_time
= 0;
1681 tx_tspec
->time_slice_start
= now
;
1683 if (tx_tspec
->downgraded
)
1685 TX_TSPEC_ACTION_STOP_DOWNGRADE
;
1688 switch (tx_tspec
->action
) {
1689 case TX_TSPEC_ACTION_STOP_DOWNGRADE
:
1690 /* take the original parameters */
1691 if (drv_conf_tx(local
, sdata
, ac
, &sdata
->tx_conf
[ac
]))
1693 "failed to set TX queue parameters for queue %d\n",
1695 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1696 tx_tspec
->downgraded
= false;
1699 case TX_TSPEC_ACTION_DOWNGRADE
:
1700 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1701 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1705 /* downgrade next lower non-ACM AC */
1706 for (non_acm_ac
= ac
+ 1;
1707 non_acm_ac
< IEEE80211_NUM_ACS
;
1709 if (!(sdata
->wmm_acm
& BIT(7 - 2 * non_acm_ac
)))
1711 /* The loop will result in using BK even if it requires
1712 * admission control, such configuration makes no sense
1713 * and we have to transmit somehow - the AC selection
1714 * does the same thing.
1716 if (drv_conf_tx(local
, sdata
, ac
,
1717 &sdata
->tx_conf
[non_acm_ac
]))
1719 "failed to set TX queue parameters for queue %d\n",
1721 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1723 schedule_delayed_work(&ifmgd
->tx_tspec_wk
,
1724 tx_tspec
->time_slice_start
+ HZ
- now
+ 1);
1726 case TX_TSPEC_ACTION_NONE
:
1735 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1737 if (__ieee80211_sta_handle_tspec_ac_params(sdata
))
1738 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
1741 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct
*work
)
1743 struct ieee80211_sub_if_data
*sdata
;
1745 sdata
= container_of(work
, struct ieee80211_sub_if_data
,
1746 u
.mgd
.tx_tspec_wk
.work
);
1747 ieee80211_sta_handle_tspec_ac_params(sdata
);
1751 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1752 struct ieee80211_sub_if_data
*sdata
,
1753 const u8
*wmm_param
, size_t wmm_param_len
)
1755 struct ieee80211_tx_queue_params params
;
1756 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1760 u8 uapsd_queues
= 0;
1762 if (!local
->ops
->conf_tx
)
1765 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1771 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1774 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1775 uapsd_queues
= ifmgd
->uapsd_queues
;
1777 count
= wmm_param
[6] & 0x0f;
1778 if (count
== ifmgd
->wmm_last_param_set
)
1780 ifmgd
->wmm_last_param_set
= count
;
1782 pos
= wmm_param
+ 8;
1783 left
= wmm_param_len
- 8;
1785 memset(¶ms
, 0, sizeof(params
));
1788 for (; left
>= 4; left
-= 4, pos
+= 4) {
1789 int aci
= (pos
[0] >> 5) & 0x03;
1790 int acm
= (pos
[0] >> 4) & 0x01;
1798 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1799 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1805 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1806 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1812 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1813 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1820 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1821 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1826 params
.aifs
= pos
[0] & 0x0f;
1827 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1828 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1829 params
.txop
= get_unaligned_le16(pos
+ 2);
1831 params
.uapsd
= uapsd
;
1834 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1836 params
.aifs
, params
.cw_min
, params
.cw_max
,
1837 params
.txop
, params
.uapsd
,
1838 ifmgd
->tx_tspec
[queue
].downgraded
);
1839 sdata
->tx_conf
[queue
] = params
;
1840 if (!ifmgd
->tx_tspec
[queue
].downgraded
&&
1841 drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1843 "failed to set TX queue parameters for queue %d\n",
1847 /* enable WMM or activate new settings */
1848 sdata
->vif
.bss_conf
.qos
= true;
1852 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1854 lockdep_assert_held(&sdata
->local
->mtx
);
1856 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1857 ieee80211_run_deferred_scan(sdata
->local
);
1860 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1862 mutex_lock(&sdata
->local
->mtx
);
1863 __ieee80211_stop_poll(sdata
);
1864 mutex_unlock(&sdata
->local
->mtx
);
1867 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1868 u16 capab
, bool erp_valid
, u8 erp
)
1870 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1872 bool use_protection
;
1873 bool use_short_preamble
;
1874 bool use_short_slot
;
1877 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1878 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1880 use_protection
= false;
1881 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1884 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1885 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1886 use_short_slot
= true;
1888 if (use_protection
!= bss_conf
->use_cts_prot
) {
1889 bss_conf
->use_cts_prot
= use_protection
;
1890 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1893 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1894 bss_conf
->use_short_preamble
= use_short_preamble
;
1895 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1898 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1899 bss_conf
->use_short_slot
= use_short_slot
;
1900 changed
|= BSS_CHANGED_ERP_SLOT
;
1906 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1907 struct cfg80211_bss
*cbss
,
1908 u32 bss_info_changed
)
1910 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1911 struct ieee80211_local
*local
= sdata
->local
;
1912 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1914 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1915 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1916 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1918 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1919 beacon_loss_count
* bss_conf
->beacon_int
));
1921 sdata
->u
.mgd
.associated
= cbss
;
1922 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1924 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1926 if (sdata
->vif
.p2p
) {
1927 const struct cfg80211_bss_ies
*ies
;
1930 ies
= rcu_dereference(cbss
->ies
);
1934 ret
= cfg80211_get_p2p_attr(
1935 ies
->data
, ies
->len
,
1936 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1937 (u8
*) &bss_conf
->p2p_noa_attr
,
1938 sizeof(bss_conf
->p2p_noa_attr
));
1940 sdata
->u
.mgd
.p2p_noa_index
=
1941 bss_conf
->p2p_noa_attr
.index
;
1942 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1948 /* just to be sure */
1949 ieee80211_stop_poll(sdata
);
1951 ieee80211_led_assoc(local
, 1);
1953 if (sdata
->u
.mgd
.have_beacon
) {
1955 * If the AP is buggy we may get here with no DTIM period
1956 * known, so assume it's 1 which is the only safe assumption
1957 * in that case, although if the TIM IE is broken powersave
1958 * probably just won't work at all.
1960 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1961 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1962 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1964 bss_conf
->beacon_rate
= NULL
;
1965 bss_conf
->dtim_period
= 0;
1968 bss_conf
->assoc
= 1;
1970 /* Tell the driver to monitor connection quality (if supported) */
1971 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1972 bss_conf
->cqm_rssi_thold
)
1973 bss_info_changed
|= BSS_CHANGED_CQM
;
1975 /* Enable ARP filtering */
1976 if (bss_conf
->arp_addr_cnt
)
1977 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1979 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1981 mutex_lock(&local
->iflist_mtx
);
1982 ieee80211_recalc_ps(local
, -1);
1983 mutex_unlock(&local
->iflist_mtx
);
1985 ieee80211_recalc_smps(sdata
);
1986 ieee80211_recalc_ps_vif(sdata
);
1988 netif_carrier_on(sdata
->dev
);
1991 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1992 u16 stype
, u16 reason
, bool tx
,
1995 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1996 struct ieee80211_local
*local
= sdata
->local
;
1999 sdata_assert_lock(sdata
);
2001 if (WARN_ON_ONCE(tx
&& !frame_buf
))
2004 if (WARN_ON(!ifmgd
->associated
))
2007 ieee80211_stop_poll(sdata
);
2009 ifmgd
->associated
= NULL
;
2010 netif_carrier_off(sdata
->dev
);
2013 * if we want to get out of ps before disassoc (why?) we have
2014 * to do it before sending disassoc, as otherwise the null-packet
2017 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2018 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2019 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2021 local
->ps_sdata
= NULL
;
2023 /* disable per-vif ps */
2024 ieee80211_recalc_ps_vif(sdata
);
2026 /* make sure ongoing transmission finishes */
2030 * drop any frame before deauth/disassoc, this can be data or
2031 * management frame. Since we are disconnecting, we should not
2032 * insist sending these frames which can take time and delay
2033 * the disconnection and possible the roaming.
2036 ieee80211_flush_queues(local
, sdata
, true);
2038 /* deauthenticate/disassociate now */
2039 if (tx
|| frame_buf
)
2040 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
2041 reason
, tx
, frame_buf
);
2043 /* flush out frame - make sure the deauth was actually sent */
2045 ieee80211_flush_queues(local
, sdata
, false);
2047 /* clear bssid only after building the needed mgmt frames */
2048 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
2050 /* remove AP and TDLS peers */
2051 sta_info_flush(sdata
);
2053 /* finally reset all BSS / config parameters */
2054 changed
|= ieee80211_reset_erp_info(sdata
);
2056 ieee80211_led_assoc(local
, 0);
2057 changed
|= BSS_CHANGED_ASSOC
;
2058 sdata
->vif
.bss_conf
.assoc
= false;
2060 ifmgd
->p2p_noa_index
= -1;
2061 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
2062 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
2064 /* on the next assoc, re-program HT/VHT parameters */
2065 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
2066 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
2067 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
2068 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
2070 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
2072 del_timer_sync(&local
->dynamic_ps_timer
);
2073 cancel_work_sync(&local
->dynamic_ps_enable_work
);
2075 /* Disable ARP filtering */
2076 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
2077 changed
|= BSS_CHANGED_ARP_FILTER
;
2079 sdata
->vif
.bss_conf
.qos
= false;
2080 changed
|= BSS_CHANGED_QOS
;
2082 /* The BSSID (not really interesting) and HT changed */
2083 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
2084 ieee80211_bss_info_change_notify(sdata
, changed
);
2086 /* disassociated - set to defaults now */
2087 ieee80211_set_wmm_default(sdata
, false);
2089 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
2090 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
2091 del_timer_sync(&sdata
->u
.mgd
.timer
);
2092 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
2094 sdata
->vif
.bss_conf
.dtim_period
= 0;
2095 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
2097 ifmgd
->have_beacon
= false;
2100 mutex_lock(&local
->mtx
);
2101 ieee80211_vif_release_channel(sdata
);
2103 sdata
->vif
.csa_active
= false;
2104 ifmgd
->csa_waiting_bcn
= false;
2105 ifmgd
->csa_ignored_same_chan
= false;
2106 if (sdata
->csa_block_tx
) {
2107 ieee80211_wake_vif_queues(local
, sdata
,
2108 IEEE80211_QUEUE_STOP_REASON_CSA
);
2109 sdata
->csa_block_tx
= false;
2111 mutex_unlock(&local
->mtx
);
2113 /* existing TX TSPEC sessions no longer exist */
2114 memset(ifmgd
->tx_tspec
, 0, sizeof(ifmgd
->tx_tspec
));
2115 cancel_delayed_work_sync(&ifmgd
->tx_tspec_wk
);
2117 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2120 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
2121 struct ieee80211_hdr
*hdr
)
2124 * We can postpone the mgd.timer whenever receiving unicast frames
2125 * from AP because we know that the connection is working both ways
2126 * at that time. But multicast frames (and hence also beacons) must
2127 * be ignored here, because we need to trigger the timer during
2128 * data idle periods for sending the periodic probe request to the
2129 * AP we're connected to.
2131 if (is_multicast_ether_addr(hdr
->addr1
))
2134 ieee80211_sta_reset_conn_monitor(sdata
);
2137 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
2139 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2140 struct ieee80211_local
*local
= sdata
->local
;
2142 mutex_lock(&local
->mtx
);
2143 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
2146 __ieee80211_stop_poll(sdata
);
2148 mutex_lock(&local
->iflist_mtx
);
2149 ieee80211_recalc_ps(local
, -1);
2150 mutex_unlock(&local
->iflist_mtx
);
2152 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
2156 * We've received a probe response, but are not sure whether
2157 * we have or will be receiving any beacons or data, so let's
2158 * schedule the timers again, just in case.
2160 ieee80211_sta_reset_beacon_monitor(sdata
);
2162 mod_timer(&ifmgd
->conn_mon_timer
,
2163 round_jiffies_up(jiffies
+
2164 IEEE80211_CONNECTION_IDLE_TIME
));
2166 mutex_unlock(&local
->mtx
);
2169 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data
*sdata
,
2170 struct ieee80211_hdr
*hdr
,
2173 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2174 u16 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
2175 int ac
= ieee80211_ac_from_tid(tid
);
2176 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
2177 unsigned long now
= jiffies
;
2179 if (likely(!tx_tspec
->admitted_time
))
2182 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
2183 tx_tspec
->consumed_tx_time
= 0;
2184 tx_tspec
->time_slice_start
= now
;
2186 if (tx_tspec
->downgraded
) {
2187 tx_tspec
->action
= TX_TSPEC_ACTION_STOP_DOWNGRADE
;
2188 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2192 if (tx_tspec
->downgraded
)
2195 tx_tspec
->consumed_tx_time
+= tx_time
;
2197 if (tx_tspec
->consumed_tx_time
>= tx_tspec
->admitted_time
) {
2198 tx_tspec
->downgraded
= true;
2199 tx_tspec
->action
= TX_TSPEC_ACTION_DOWNGRADE
;
2200 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2204 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
2205 struct ieee80211_hdr
*hdr
, bool ack
, u16 tx_time
)
2207 ieee80211_sta_tx_wmm_ac_notify(sdata
, hdr
, tx_time
);
2209 if (!ieee80211_is_data(hdr
->frame_control
))
2212 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
2213 sdata
->u
.mgd
.probe_send_count
> 0) {
2215 ieee80211_sta_reset_conn_monitor(sdata
);
2217 sdata
->u
.mgd
.nullfunc_failed
= true;
2218 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2223 ieee80211_sta_reset_conn_monitor(sdata
);
2226 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2228 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2230 u8
*dst
= ifmgd
->associated
->bssid
;
2231 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2234 * Try sending broadcast probe requests for the last three
2235 * probe requests after the first ones failed since some
2236 * buggy APs only support broadcast probe requests.
2238 if (ifmgd
->probe_send_count
>= unicast_limit
)
2242 * When the hardware reports an accurate Tx ACK status, it's
2243 * better to send a nullfunc frame instead of a probe request,
2244 * as it will kick us off the AP quickly if we aren't associated
2245 * anymore. The timeout will be reset if the frame is ACKed by
2248 ifmgd
->probe_send_count
++;
2250 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2251 ifmgd
->nullfunc_failed
= false;
2252 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
2257 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2258 if (WARN_ON_ONCE(ssid
== NULL
))
2263 ieee80211_send_probe_req(sdata
, sdata
->vif
.addr
, NULL
,
2264 ssid
+ 2, ssid_len
, NULL
,
2265 0, (u32
) -1, true, 0,
2266 ifmgd
->associated
->channel
, false);
2270 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2271 run_again(sdata
, ifmgd
->probe_timeout
);
2274 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2277 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2278 bool already
= false;
2280 if (!ieee80211_sdata_running(sdata
))
2285 if (!ifmgd
->associated
)
2288 mutex_lock(&sdata
->local
->mtx
);
2290 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2291 mutex_unlock(&sdata
->local
->mtx
);
2296 mlme_dbg_ratelimited(sdata
,
2297 "detected beacon loss from AP (missed %d beacons) - probing\n",
2300 ieee80211_cqm_beacon_loss_notify(&sdata
->vif
, GFP_KERNEL
);
2304 * The driver/our work has already reported this event or the
2305 * connection monitoring has kicked in and we have already sent
2306 * a probe request. Or maybe the AP died and the driver keeps
2307 * reporting until we disassociate...
2309 * In either case we have to ignore the current call to this
2310 * function (except for setting the correct probe reason bit)
2311 * because otherwise we would reset the timer every time and
2312 * never check whether we received a probe response!
2314 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
2317 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2319 mutex_unlock(&sdata
->local
->mtx
);
2324 mutex_lock(&sdata
->local
->iflist_mtx
);
2325 ieee80211_recalc_ps(sdata
->local
, -1);
2326 mutex_unlock(&sdata
->local
->iflist_mtx
);
2328 ifmgd
->probe_send_count
= 0;
2329 ieee80211_mgd_probe_ap_send(sdata
);
2331 sdata_unlock(sdata
);
2334 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2335 struct ieee80211_vif
*vif
)
2337 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2338 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2339 struct cfg80211_bss
*cbss
;
2340 struct sk_buff
*skb
;
2344 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2347 sdata_assert_lock(sdata
);
2349 if (ifmgd
->associated
)
2350 cbss
= ifmgd
->associated
;
2351 else if (ifmgd
->auth_data
)
2352 cbss
= ifmgd
->auth_data
->bss
;
2353 else if (ifmgd
->assoc_data
)
2354 cbss
= ifmgd
->assoc_data
->bss
;
2359 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2360 if (WARN_ON_ONCE(ssid
== NULL
))
2365 skb
= ieee80211_build_probe_req(sdata
, sdata
->vif
.addr
, cbss
->bssid
,
2366 (u32
) -1, cbss
->channel
,
2373 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2375 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2377 struct ieee80211_local
*local
= sdata
->local
;
2378 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2379 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2382 if (!ifmgd
->associated
) {
2383 sdata_unlock(sdata
);
2387 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2388 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2390 mutex_lock(&local
->mtx
);
2391 sdata
->vif
.csa_active
= false;
2392 ifmgd
->csa_waiting_bcn
= false;
2393 if (sdata
->csa_block_tx
) {
2394 ieee80211_wake_vif_queues(local
, sdata
,
2395 IEEE80211_QUEUE_STOP_REASON_CSA
);
2396 sdata
->csa_block_tx
= false;
2398 mutex_unlock(&local
->mtx
);
2400 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
2401 IEEE80211_DEAUTH_FRAME_LEN
);
2402 sdata_unlock(sdata
);
2405 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2407 struct ieee80211_sub_if_data
*sdata
=
2408 container_of(work
, struct ieee80211_sub_if_data
,
2409 u
.mgd
.beacon_connection_loss_work
);
2410 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2411 struct sta_info
*sta
;
2413 if (ifmgd
->associated
) {
2415 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2417 sta
->beacon_loss_count
++;
2421 if (ifmgd
->connection_loss
) {
2422 sdata_info(sdata
, "Connection to AP %pM lost\n",
2424 __ieee80211_disconnect(sdata
);
2426 ieee80211_mgd_probe_ap(sdata
, true);
2430 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2432 struct ieee80211_sub_if_data
*sdata
=
2433 container_of(work
, struct ieee80211_sub_if_data
,
2434 u
.mgd
.csa_connection_drop_work
);
2436 __ieee80211_disconnect(sdata
);
2439 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2441 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2442 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2444 trace_api_beacon_loss(sdata
);
2446 sdata
->u
.mgd
.connection_loss
= false;
2447 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2449 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2451 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2453 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2454 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2456 trace_api_connection_loss(sdata
);
2458 sdata
->u
.mgd
.connection_loss
= true;
2459 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2461 EXPORT_SYMBOL(ieee80211_connection_loss
);
2464 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2467 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2469 sdata_assert_lock(sdata
);
2473 * we are not authenticated yet, the only timer that could be
2474 * running is the timeout for the authentication response which
2475 * which is not relevant anymore.
2477 del_timer_sync(&sdata
->u
.mgd
.timer
);
2478 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2480 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2481 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2482 sdata
->u
.mgd
.flags
= 0;
2483 mutex_lock(&sdata
->local
->mtx
);
2484 ieee80211_vif_release_channel(sdata
);
2485 mutex_unlock(&sdata
->local
->mtx
);
2488 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2490 sdata
->u
.mgd
.auth_data
= NULL
;
2493 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2494 struct ieee80211_mgmt
*mgmt
, size_t len
)
2496 struct ieee80211_local
*local
= sdata
->local
;
2497 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2499 struct ieee802_11_elems elems
;
2502 pos
= mgmt
->u
.auth
.variable
;
2503 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2504 if (!elems
.challenge
)
2506 auth_data
->expected_transaction
= 4;
2507 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2508 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2509 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2510 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2511 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2512 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2513 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2514 auth_data
->key
, auth_data
->key_len
,
2515 auth_data
->key_idx
, tx_flags
);
2518 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2519 struct ieee80211_mgmt
*mgmt
, size_t len
)
2521 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2523 u16 auth_alg
, auth_transaction
, status_code
;
2524 struct sta_info
*sta
;
2526 sdata_assert_lock(sdata
);
2531 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2534 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2536 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2539 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2540 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2541 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2543 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2544 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2545 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2546 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2548 ifmgd
->auth_data
->expected_transaction
);
2552 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2553 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2554 mgmt
->sa
, status_code
);
2555 ieee80211_destroy_auth_data(sdata
, false);
2556 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2560 switch (ifmgd
->auth_data
->algorithm
) {
2561 case WLAN_AUTH_OPEN
:
2562 case WLAN_AUTH_LEAP
:
2566 case WLAN_AUTH_SHARED_KEY
:
2567 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2568 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2569 /* need another frame */
2574 WARN_ONCE(1, "invalid auth alg %d",
2575 ifmgd
->auth_data
->algorithm
);
2579 sdata_info(sdata
, "authenticated\n");
2580 ifmgd
->auth_data
->done
= true;
2581 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2582 ifmgd
->auth_data
->timeout_started
= true;
2583 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2585 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2586 ifmgd
->auth_data
->expected_transaction
!= 2) {
2588 * Report auth frame to user space for processing since another
2589 * round of Authentication frames is still needed.
2591 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2595 /* move station state to auth */
2596 mutex_lock(&sdata
->local
->sta_mtx
);
2597 sta
= sta_info_get(sdata
, bssid
);
2599 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2602 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2603 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2606 mutex_unlock(&sdata
->local
->sta_mtx
);
2608 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2611 mutex_unlock(&sdata
->local
->sta_mtx
);
2612 /* ignore frame -- wait for timeout */
2615 #define case_WLAN(type) \
2616 case WLAN_REASON_##type: return #type
2618 static const char *ieee80211_get_reason_code_string(u16 reason_code
)
2620 switch (reason_code
) {
2621 case_WLAN(UNSPECIFIED
);
2622 case_WLAN(PREV_AUTH_NOT_VALID
);
2623 case_WLAN(DEAUTH_LEAVING
);
2624 case_WLAN(DISASSOC_DUE_TO_INACTIVITY
);
2625 case_WLAN(DISASSOC_AP_BUSY
);
2626 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA
);
2627 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA
);
2628 case_WLAN(DISASSOC_STA_HAS_LEFT
);
2629 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH
);
2630 case_WLAN(DISASSOC_BAD_POWER
);
2631 case_WLAN(DISASSOC_BAD_SUPP_CHAN
);
2632 case_WLAN(INVALID_IE
);
2633 case_WLAN(MIC_FAILURE
);
2634 case_WLAN(4WAY_HANDSHAKE_TIMEOUT
);
2635 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT
);
2636 case_WLAN(IE_DIFFERENT
);
2637 case_WLAN(INVALID_GROUP_CIPHER
);
2638 case_WLAN(INVALID_PAIRWISE_CIPHER
);
2639 case_WLAN(INVALID_AKMP
);
2640 case_WLAN(UNSUPP_RSN_VERSION
);
2641 case_WLAN(INVALID_RSN_IE_CAP
);
2642 case_WLAN(IEEE8021X_FAILED
);
2643 case_WLAN(CIPHER_SUITE_REJECTED
);
2644 case_WLAN(DISASSOC_UNSPECIFIED_QOS
);
2645 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH
);
2646 case_WLAN(DISASSOC_LOW_ACK
);
2647 case_WLAN(DISASSOC_QAP_EXCEED_TXOP
);
2648 case_WLAN(QSTA_LEAVE_QBSS
);
2649 case_WLAN(QSTA_NOT_USE
);
2650 case_WLAN(QSTA_REQUIRE_SETUP
);
2651 case_WLAN(QSTA_TIMEOUT
);
2652 case_WLAN(QSTA_CIPHER_NOT_SUPP
);
2653 case_WLAN(MESH_PEER_CANCELED
);
2654 case_WLAN(MESH_MAX_PEERS
);
2655 case_WLAN(MESH_CONFIG
);
2656 case_WLAN(MESH_CLOSE
);
2657 case_WLAN(MESH_MAX_RETRIES
);
2658 case_WLAN(MESH_CONFIRM_TIMEOUT
);
2659 case_WLAN(MESH_INVALID_GTK
);
2660 case_WLAN(MESH_INCONSISTENT_PARAM
);
2661 case_WLAN(MESH_INVALID_SECURITY
);
2662 case_WLAN(MESH_PATH_ERROR
);
2663 case_WLAN(MESH_PATH_NOFORWARD
);
2664 case_WLAN(MESH_PATH_DEST_UNREACHABLE
);
2665 case_WLAN(MAC_EXISTS_IN_MBSS
);
2666 case_WLAN(MESH_CHAN_REGULATORY
);
2667 case_WLAN(MESH_CHAN
);
2668 default: return "<unknown>";
2672 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2673 struct ieee80211_mgmt
*mgmt
, size_t len
)
2675 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2676 const u8
*bssid
= NULL
;
2679 sdata_assert_lock(sdata
);
2684 if (!ifmgd
->associated
||
2685 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2688 bssid
= ifmgd
->associated
->bssid
;
2690 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2692 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u=%s)\n",
2693 bssid
, reason_code
, ieee80211_get_reason_code_string(reason_code
));
2695 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2697 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2701 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2702 struct ieee80211_mgmt
*mgmt
, size_t len
)
2704 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2707 sdata_assert_lock(sdata
);
2712 if (!ifmgd
->associated
||
2713 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2716 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2718 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2719 mgmt
->sa
, reason_code
);
2721 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2723 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2726 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2727 u8
*supp_rates
, unsigned int supp_rates_len
,
2728 u32
*rates
, u32
*basic_rates
,
2729 bool *have_higher_than_11mbit
,
2730 int *min_rate
, int *min_rate_index
,
2731 int shift
, u32 rate_flags
)
2735 for (i
= 0; i
< supp_rates_len
; i
++) {
2736 int rate
= supp_rates
[i
] & 0x7f;
2737 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2739 if ((rate
* 5 * (1 << shift
)) > 110)
2740 *have_higher_than_11mbit
= true;
2743 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2744 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2746 * Note: Even through the membership selector and the basic
2747 * rate flag share the same bit, they are not exactly
2750 if (!!(supp_rates
[i
] & 0x80) &&
2751 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2754 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2755 struct ieee80211_rate
*br
;
2758 br
= &sband
->bitrates
[j
];
2759 if ((rate_flags
& br
->flags
) != rate_flags
)
2762 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2763 if (brate
== rate
) {
2766 *basic_rates
|= BIT(j
);
2767 if ((rate
* 5) < *min_rate
) {
2768 *min_rate
= rate
* 5;
2769 *min_rate_index
= j
;
2777 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2780 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2782 sdata_assert_lock(sdata
);
2786 * we are not associated yet, the only timer that could be
2787 * running is the timeout for the association response which
2788 * which is not relevant anymore.
2790 del_timer_sync(&sdata
->u
.mgd
.timer
);
2791 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2793 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2794 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2795 sdata
->u
.mgd
.flags
= 0;
2796 mutex_lock(&sdata
->local
->mtx
);
2797 ieee80211_vif_release_channel(sdata
);
2798 mutex_unlock(&sdata
->local
->mtx
);
2802 sdata
->u
.mgd
.assoc_data
= NULL
;
2805 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2806 struct cfg80211_bss
*cbss
,
2807 struct ieee80211_mgmt
*mgmt
, size_t len
)
2809 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2810 struct ieee80211_local
*local
= sdata
->local
;
2811 struct ieee80211_supported_band
*sband
;
2812 struct sta_info
*sta
;
2814 u16 capab_info
, aid
;
2815 struct ieee802_11_elems elems
;
2816 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2817 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2818 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2823 /* AssocResp and ReassocResp have identical structure */
2825 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2826 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2828 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2829 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2831 aid
&= ~(BIT(15) | BIT(14));
2833 ifmgd
->broken_ap
= false;
2835 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2836 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2839 ifmgd
->broken_ap
= true;
2842 pos
= mgmt
->u
.assoc_resp
.variable
;
2843 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2845 if (!elems
.supp_rates
) {
2846 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2851 ifmgd
->tdls_chan_switch_prohibited
=
2852 elems
.ext_capab
&& elems
.ext_capab_len
>= 5 &&
2853 (elems
.ext_capab
[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED
);
2856 * Some APs are erroneously not including some information in their
2857 * (re)association response frames. Try to recover by using the data
2858 * from the beacon or probe response. This seems to afflict mobile
2859 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2860 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2862 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2863 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2864 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2865 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2866 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2867 const struct cfg80211_bss_ies
*ies
;
2868 struct ieee802_11_elems bss_elems
;
2871 ies
= rcu_dereference(cbss
->ies
);
2873 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2879 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2881 if (assoc_data
->wmm
&&
2882 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2883 elems
.wmm_param
= bss_elems
.wmm_param
;
2885 "AP bug: WMM param missing from AssocResp\n");
2889 * Also check if we requested HT/VHT, otherwise the AP doesn't
2890 * have to include the IEs in the (re)association response.
2892 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2893 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2894 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2896 "AP bug: HT capability missing from AssocResp\n");
2898 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2899 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2900 elems
.ht_operation
= bss_elems
.ht_operation
;
2902 "AP bug: HT operation missing from AssocResp\n");
2904 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2905 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2906 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2908 "AP bug: VHT capa missing from AssocResp\n");
2910 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2911 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2912 elems
.vht_operation
= bss_elems
.vht_operation
;
2914 "AP bug: VHT operation missing from AssocResp\n");
2919 * We previously checked these in the beacon/probe response, so
2920 * they should be present here. This is just a safety net.
2922 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2923 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2925 "HT AP is missing WMM params or HT capability/operation\n");
2930 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2931 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2933 "VHT AP is missing VHT capability/operation\n");
2938 mutex_lock(&sdata
->local
->sta_mtx
);
2940 * station info was already allocated and inserted before
2941 * the association and should be available to us
2943 sta
= sta_info_get(sdata
, cbss
->bssid
);
2944 if (WARN_ON(!sta
)) {
2945 mutex_unlock(&sdata
->local
->sta_mtx
);
2950 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2952 /* Set up internal HT/VHT capabilities */
2953 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2954 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2955 elems
.ht_cap_elem
, sta
);
2957 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2958 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2959 elems
.vht_cap_elem
, sta
);
2962 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2963 * in their association response, so ignore that data for our own
2964 * configuration. If it changed since the last beacon, we'll get the
2965 * next beacon and update then.
2969 * If an operating mode notification IE is present, override the
2970 * NSS calculation (that would be done in rate_control_rate_init())
2971 * and use the # of streams from that element.
2973 if (elems
.opmode_notif
&&
2974 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2977 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2978 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2980 sta
->sta
.rx_nss
= nss
;
2983 rate_control_rate_init(sta
);
2985 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2986 set_sta_flag(sta
, WLAN_STA_MFP
);
2988 sta
->sta
.wme
= elems
.wmm_param
;
2990 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2991 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2992 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2995 "failed to move station %pM to desired state\n",
2997 WARN_ON(__sta_info_destroy(sta
));
2998 mutex_unlock(&sdata
->local
->sta_mtx
);
3003 mutex_unlock(&sdata
->local
->sta_mtx
);
3006 * Always handle WMM once after association regardless
3007 * of the first value the AP uses. Setting -1 here has
3008 * that effect because the AP values is an unsigned
3011 ifmgd
->wmm_last_param_set
= -1;
3013 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) && elems
.wmm_param
)
3014 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3015 elems
.wmm_param_len
);
3017 ieee80211_set_wmm_default(sdata
, false);
3018 changed
|= BSS_CHANGED_QOS
;
3020 /* set AID and assoc capability,
3021 * ieee80211_set_associated() will tell the driver */
3022 bss_conf
->aid
= aid
;
3023 bss_conf
->assoc_capability
= capab_info
;
3024 ieee80211_set_associated(sdata
, cbss
, changed
);
3027 * If we're using 4-addr mode, let the AP know that we're
3028 * doing so, so that it can create the STA VLAN on its side
3030 if (ifmgd
->use_4addr
)
3031 ieee80211_send_4addr_nullfunc(local
, sdata
);
3034 * Start timer to probe the connection to the AP now.
3035 * Also start the timer that will detect beacon loss.
3037 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
3038 ieee80211_sta_reset_beacon_monitor(sdata
);
3046 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
3047 struct ieee80211_mgmt
*mgmt
,
3050 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3051 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
3052 u16 capab_info
, status_code
, aid
;
3053 struct ieee802_11_elems elems
;
3054 int ac
, uapsd_queues
= -1;
3057 struct cfg80211_bss
*bss
;
3059 sdata_assert_lock(sdata
);
3063 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
3067 * AssocResp and ReassocResp have identical structure, so process both
3068 * of them in this function.
3074 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
3075 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
3076 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
3077 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
3080 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3081 reassoc
? "Rea" : "A", mgmt
->sa
,
3082 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
3084 pos
= mgmt
->u
.assoc_resp
.variable
;
3085 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
3087 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
3088 elems
.timeout_int
&&
3089 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
3091 tu
= le32_to_cpu(elems
.timeout_int
->value
);
3092 ms
= tu
* 1024 / 1000;
3094 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3096 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
3097 assoc_data
->timeout_started
= true;
3098 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
3099 run_again(sdata
, assoc_data
->timeout
);
3103 bss
= assoc_data
->bss
;
3105 if (status_code
!= WLAN_STATUS_SUCCESS
) {
3106 sdata_info(sdata
, "%pM denied association (code=%d)\n",
3107 mgmt
->sa
, status_code
);
3108 ieee80211_destroy_assoc_data(sdata
, false);
3110 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
3111 /* oops -- internal error -- send timeout for now */
3112 ieee80211_destroy_assoc_data(sdata
, false);
3113 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3116 sdata_info(sdata
, "associated\n");
3119 * destroy assoc_data afterwards, as otherwise an idle
3120 * recalc after assoc_data is NULL but before associated
3121 * is set can cause the interface to go idle
3123 ieee80211_destroy_assoc_data(sdata
, true);
3125 /* get uapsd queues configuration */
3127 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
3128 if (sdata
->tx_conf
[ac
].uapsd
)
3129 uapsd_queues
|= BIT(ac
);
3132 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
, uapsd_queues
);
3135 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
3136 struct ieee80211_mgmt
*mgmt
, size_t len
,
3137 struct ieee80211_rx_status
*rx_status
,
3138 struct ieee802_11_elems
*elems
)
3140 struct ieee80211_local
*local
= sdata
->local
;
3141 struct ieee80211_bss
*bss
;
3142 struct ieee80211_channel
*channel
;
3144 sdata_assert_lock(sdata
);
3146 channel
= ieee80211_get_channel(local
->hw
.wiphy
, rx_status
->freq
);
3150 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
3153 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
3154 ieee80211_rx_bss_put(local
, bss
);
3159 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
3160 struct sk_buff
*skb
)
3162 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
3163 struct ieee80211_if_managed
*ifmgd
;
3164 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
3165 size_t baselen
, len
= skb
->len
;
3166 struct ieee802_11_elems elems
;
3168 ifmgd
= &sdata
->u
.mgd
;
3170 sdata_assert_lock(sdata
);
3172 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
3173 return; /* ignore ProbeResp to foreign address */
3175 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
3179 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
3182 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3184 if (ifmgd
->associated
&&
3185 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3186 ieee80211_reset_ap_probe(sdata
);
3188 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
3189 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
3190 /* got probe response, continue with auth */
3191 sdata_info(sdata
, "direct probe responded\n");
3192 ifmgd
->auth_data
->tries
= 0;
3193 ifmgd
->auth_data
->timeout
= jiffies
;
3194 ifmgd
->auth_data
->timeout_started
= true;
3195 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3200 * This is the canonical list of information elements we care about,
3201 * the filter code also gives us all changes to the Microsoft OUI
3202 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3203 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3204 * changes to requested client power.
3206 * We implement beacon filtering in software since that means we can
3207 * avoid processing the frame here and in cfg80211, and userspace
3208 * will not be able to tell whether the hardware supports it or not.
3210 * XXX: This list needs to be dynamic -- userspace needs to be able to
3211 * add items it requires. It also needs to be able to tell us to
3212 * look out for other vendor IEs.
3214 static const u64 care_about_ies
=
3215 (1ULL << WLAN_EID_COUNTRY
) |
3216 (1ULL << WLAN_EID_ERP_INFO
) |
3217 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
3218 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
3219 (1ULL << WLAN_EID_HT_CAPABILITY
) |
3220 (1ULL << WLAN_EID_HT_OPERATION
) |
3221 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN
);
3223 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
3224 struct ieee80211_mgmt
*mgmt
, size_t len
,
3225 struct ieee80211_rx_status
*rx_status
)
3227 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3228 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
3230 struct ieee802_11_elems elems
;
3231 struct ieee80211_local
*local
= sdata
->local
;
3232 struct ieee80211_chanctx_conf
*chanctx_conf
;
3233 struct ieee80211_channel
*chan
;
3234 struct sta_info
*sta
;
3240 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3242 sdata_assert_lock(sdata
);
3244 /* Process beacon from the current BSS */
3245 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
3250 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3251 if (!chanctx_conf
) {
3256 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
3260 chan
= chanctx_conf
->def
.chan
;
3263 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
3264 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
3265 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
3266 len
- baselen
, false, &elems
);
3268 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3269 if (elems
.tim
&& !elems
.parse_error
) {
3270 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
3271 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
3273 ifmgd
->have_beacon
= true;
3274 ifmgd
->assoc_data
->need_beacon
= false;
3275 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3276 sdata
->vif
.bss_conf
.sync_tsf
=
3277 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3278 sdata
->vif
.bss_conf
.sync_device_ts
=
3279 rx_status
->device_timestamp
;
3281 sdata
->vif
.bss_conf
.sync_dtim_count
=
3282 elems
.tim
->dtim_count
;
3284 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3286 /* continue assoc process */
3287 ifmgd
->assoc_data
->timeout
= jiffies
;
3288 ifmgd
->assoc_data
->timeout_started
= true;
3289 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3293 if (!ifmgd
->associated
||
3294 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3296 bssid
= ifmgd
->associated
->bssid
;
3298 /* Track average RSSI from the Beacon frames of the current AP */
3299 ifmgd
->last_beacon_signal
= rx_status
->signal
;
3300 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3301 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3302 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
3303 ifmgd
->last_cqm_event_signal
= 0;
3304 ifmgd
->count_beacon_signal
= 1;
3305 ifmgd
->last_ave_beacon_signal
= 0;
3307 ifmgd
->ave_beacon_signal
=
3308 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
3309 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
3310 ifmgd
->ave_beacon_signal
) / 16;
3311 ifmgd
->count_beacon_signal
++;
3314 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3315 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3316 int sig
= ifmgd
->ave_beacon_signal
;
3317 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3320 * if signal crosses either of the boundaries, invoke callback
3321 * with appropriate parameters
3323 if (sig
> ifmgd
->rssi_max_thold
&&
3324 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3325 ifmgd
->last_ave_beacon_signal
= sig
;
3326 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
3327 } else if (sig
< ifmgd
->rssi_min_thold
&&
3328 (last_sig
>= ifmgd
->rssi_max_thold
||
3330 ifmgd
->last_ave_beacon_signal
= sig
;
3331 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
3335 if (bss_conf
->cqm_rssi_thold
&&
3336 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3337 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3338 int sig
= ifmgd
->ave_beacon_signal
/ 16;
3339 int last_event
= ifmgd
->last_cqm_event_signal
;
3340 int thold
= bss_conf
->cqm_rssi_thold
;
3341 int hyst
= bss_conf
->cqm_rssi_hyst
;
3343 (last_event
== 0 || sig
< last_event
- hyst
)) {
3344 ifmgd
->last_cqm_event_signal
= sig
;
3345 ieee80211_cqm_rssi_notify(
3347 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3349 } else if (sig
> thold
&&
3350 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3351 ifmgd
->last_cqm_event_signal
= sig
;
3352 ieee80211_cqm_rssi_notify(
3354 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3359 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
3360 mlme_dbg_ratelimited(sdata
,
3361 "cancelling AP probe due to a received beacon\n");
3362 ieee80211_reset_ap_probe(sdata
);
3366 * Push the beacon loss detection into the future since
3367 * we are processing a beacon from the AP just now.
3369 ieee80211_sta_reset_beacon_monitor(sdata
);
3371 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3372 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3373 len
- baselen
, false, &elems
,
3374 care_about_ies
, ncrc
);
3376 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
3377 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
3381 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3382 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3383 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3384 ieee80211_hw_config(local
,
3385 IEEE80211_CONF_CHANGE_PS
);
3387 ieee80211_send_nullfunc(local
, sdata
, 0);
3388 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3389 local
->pspolling
= true;
3392 * Here is assumed that the driver will be
3393 * able to send ps-poll frame and receive a
3394 * response even though power save mode is
3395 * enabled, but some drivers might require
3396 * to disable power save here. This needs
3397 * to be investigated.
3399 ieee80211_send_pspoll(local
, sdata
);
3404 if (sdata
->vif
.p2p
) {
3405 struct ieee80211_p2p_noa_attr noa
= {};
3408 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3410 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3411 (u8
*) &noa
, sizeof(noa
));
3413 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3414 /* valid noa_attr and index changed */
3415 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3416 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3417 changed
|= BSS_CHANGED_P2P_PS
;
3419 * make sure we update all information, the CRC
3420 * mechanism doesn't look at P2P attributes.
3422 ifmgd
->beacon_crc_valid
= false;
3424 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3425 /* noa_attr not found and we had valid noa_attr before */
3426 sdata
->u
.mgd
.p2p_noa_index
= -1;
3427 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3428 changed
|= BSS_CHANGED_P2P_PS
;
3429 ifmgd
->beacon_crc_valid
= false;
3433 if (ifmgd
->csa_waiting_bcn
)
3434 ieee80211_chswitch_post_beacon(sdata
);
3436 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3438 ifmgd
->beacon_crc
= ncrc
;
3439 ifmgd
->beacon_crc_valid
= true;
3441 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3443 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
3444 rx_status
->device_timestamp
,
3447 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
3448 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3449 elems
.wmm_param_len
))
3450 changed
|= BSS_CHANGED_QOS
;
3453 * If we haven't had a beacon before, tell the driver about the
3454 * DTIM period (and beacon timing if desired) now.
3456 if (!ifmgd
->have_beacon
) {
3457 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3459 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3461 bss_conf
->dtim_period
= 1;
3463 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3464 sdata
->vif
.bss_conf
.sync_tsf
=
3465 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3466 sdata
->vif
.bss_conf
.sync_device_ts
=
3467 rx_status
->device_timestamp
;
3469 sdata
->vif
.bss_conf
.sync_dtim_count
=
3470 elems
.tim
->dtim_count
;
3472 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3475 changed
|= BSS_CHANGED_BEACON_INFO
;
3476 ifmgd
->have_beacon
= true;
3478 mutex_lock(&local
->iflist_mtx
);
3479 ieee80211_recalc_ps(local
, -1);
3480 mutex_unlock(&local
->iflist_mtx
);
3482 ieee80211_recalc_ps_vif(sdata
);
3485 if (elems
.erp_info
) {
3487 erp_value
= elems
.erp_info
[0];
3491 changed
|= ieee80211_handle_bss_capability(sdata
,
3492 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3493 erp_valid
, erp_value
);
3495 mutex_lock(&local
->sta_mtx
);
3496 sta
= sta_info_get(sdata
, bssid
);
3498 if (ieee80211_config_bw(sdata
, sta
,
3499 elems
.ht_cap_elem
, elems
.ht_operation
,
3500 elems
.vht_operation
, bssid
, &changed
)) {
3501 mutex_unlock(&local
->sta_mtx
);
3502 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3503 WLAN_REASON_DEAUTH_LEAVING
,
3505 cfg80211_tx_mlme_mgmt(sdata
->dev
, deauth_buf
,
3506 sizeof(deauth_buf
));
3510 if (sta
&& elems
.opmode_notif
)
3511 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3512 rx_status
->band
, true);
3513 mutex_unlock(&local
->sta_mtx
);
3515 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
, mgmt
,
3517 elems
.country_elem_len
,
3518 elems
.pwr_constr_elem
,
3519 elems
.cisco_dtpc_elem
);
3521 ieee80211_bss_info_change_notify(sdata
, changed
);
3524 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3525 struct sk_buff
*skb
)
3527 struct ieee80211_rx_status
*rx_status
;
3528 struct ieee80211_mgmt
*mgmt
;
3530 struct ieee802_11_elems elems
;
3533 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3534 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3535 fc
= le16_to_cpu(mgmt
->frame_control
);
3539 switch (fc
& IEEE80211_FCTL_STYPE
) {
3540 case IEEE80211_STYPE_BEACON
:
3541 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3543 case IEEE80211_STYPE_PROBE_RESP
:
3544 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3546 case IEEE80211_STYPE_AUTH
:
3547 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3549 case IEEE80211_STYPE_DEAUTH
:
3550 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3552 case IEEE80211_STYPE_DISASSOC
:
3553 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3555 case IEEE80211_STYPE_ASSOC_RESP
:
3556 case IEEE80211_STYPE_REASSOC_RESP
:
3557 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3559 case IEEE80211_STYPE_ACTION
:
3560 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3561 ies_len
= skb
->len
-
3562 offsetof(struct ieee80211_mgmt
,
3563 u
.action
.u
.chan_switch
.variable
);
3568 ieee802_11_parse_elems(
3569 mgmt
->u
.action
.u
.chan_switch
.variable
,
3570 ies_len
, true, &elems
);
3572 if (elems
.parse_error
)
3575 ieee80211_sta_process_chanswitch(sdata
,
3577 rx_status
->device_timestamp
,
3579 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3580 ies_len
= skb
->len
-
3581 offsetof(struct ieee80211_mgmt
,
3582 u
.action
.u
.ext_chan_switch
.variable
);
3587 ieee802_11_parse_elems(
3588 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3589 ies_len
, true, &elems
);
3591 if (elems
.parse_error
)
3594 /* for the handling code pretend this was also an IE */
3595 elems
.ext_chansw_ie
=
3596 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3598 ieee80211_sta_process_chanswitch(sdata
,
3600 rx_status
->device_timestamp
,
3605 sdata_unlock(sdata
);
3608 static void ieee80211_sta_timer(unsigned long data
)
3610 struct ieee80211_sub_if_data
*sdata
=
3611 (struct ieee80211_sub_if_data
*) data
;
3613 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3616 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3617 u8
*bssid
, u8 reason
, bool tx
)
3619 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3621 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3624 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3625 IEEE80211_DEAUTH_FRAME_LEN
);
3628 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3630 struct ieee80211_local
*local
= sdata
->local
;
3631 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3632 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3635 sdata_assert_lock(sdata
);
3637 if (WARN_ON_ONCE(!auth_data
))
3642 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3643 sdata_info(sdata
, "authentication with %pM timed out\n",
3644 auth_data
->bss
->bssid
);
3647 * Most likely AP is not in the range so remove the
3648 * bss struct for that AP.
3650 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3655 drv_mgd_prepare_tx(local
, sdata
);
3657 if (auth_data
->bss
->proberesp_ies
) {
3661 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3662 auth_data
->bss
->bssid
, auth_data
->tries
,
3663 IEEE80211_AUTH_MAX_TRIES
);
3665 auth_data
->expected_transaction
= 2;
3667 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3668 trans
= auth_data
->sae_trans
;
3669 status
= auth_data
->sae_status
;
3670 auth_data
->expected_transaction
= trans
;
3673 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3674 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3675 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3677 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3678 auth_data
->data
, auth_data
->data_len
,
3679 auth_data
->bss
->bssid
,
3680 auth_data
->bss
->bssid
, NULL
, 0, 0,
3685 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3686 auth_data
->bss
->bssid
, auth_data
->tries
,
3687 IEEE80211_AUTH_MAX_TRIES
);
3690 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3696 * Direct probe is sent to broadcast address as some APs
3697 * will not answer to direct packet in unassociated state.
3699 ieee80211_send_probe_req(sdata
, sdata
->vif
.addr
, NULL
,
3700 ssidie
+ 2, ssidie
[1],
3701 NULL
, 0, (u32
) -1, true, 0,
3702 auth_data
->bss
->channel
, false);
3706 if (tx_flags
== 0) {
3707 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3708 auth_data
->timeout_started
= true;
3709 run_again(sdata
, auth_data
->timeout
);
3711 auth_data
->timeout
=
3712 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3713 auth_data
->timeout_started
= true;
3714 run_again(sdata
, auth_data
->timeout
);
3720 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3722 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3723 struct ieee80211_local
*local
= sdata
->local
;
3725 sdata_assert_lock(sdata
);
3727 assoc_data
->tries
++;
3728 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3729 sdata_info(sdata
, "association with %pM timed out\n",
3730 assoc_data
->bss
->bssid
);
3733 * Most likely AP is not in the range so remove the
3734 * bss struct for that AP.
3736 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3741 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3742 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3743 IEEE80211_ASSOC_MAX_TRIES
);
3744 ieee80211_send_assoc(sdata
);
3746 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3747 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3748 assoc_data
->timeout_started
= true;
3749 run_again(sdata
, assoc_data
->timeout
);
3751 assoc_data
->timeout
=
3752 round_jiffies_up(jiffies
+
3753 IEEE80211_ASSOC_TIMEOUT_LONG
);
3754 assoc_data
->timeout_started
= true;
3755 run_again(sdata
, assoc_data
->timeout
);
3761 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3762 __le16 fc
, bool acked
)
3764 struct ieee80211_local
*local
= sdata
->local
;
3766 sdata
->u
.mgd
.status_fc
= fc
;
3767 sdata
->u
.mgd
.status_acked
= acked
;
3768 sdata
->u
.mgd
.status_received
= true;
3770 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3773 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3775 struct ieee80211_local
*local
= sdata
->local
;
3776 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3780 if (ifmgd
->status_received
) {
3781 __le16 fc
= ifmgd
->status_fc
;
3782 bool status_acked
= ifmgd
->status_acked
;
3784 ifmgd
->status_received
= false;
3785 if (ifmgd
->auth_data
&&
3786 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3788 ifmgd
->auth_data
->timeout
=
3789 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3790 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3792 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3794 ifmgd
->auth_data
->timeout_started
= true;
3795 } else if (ifmgd
->assoc_data
&&
3796 (ieee80211_is_assoc_req(fc
) ||
3797 ieee80211_is_reassoc_req(fc
))) {
3799 ifmgd
->assoc_data
->timeout
=
3800 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3801 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3803 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3805 ifmgd
->assoc_data
->timeout_started
= true;
3809 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3810 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3811 if (ifmgd
->auth_data
->done
) {
3813 * ok ... we waited for assoc but userspace didn't,
3814 * so let's just kill the auth data
3816 ieee80211_destroy_auth_data(sdata
, false);
3817 } else if (ieee80211_probe_auth(sdata
)) {
3820 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3822 ieee80211_destroy_auth_data(sdata
, false);
3824 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3826 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3827 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3829 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3830 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3831 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3832 ieee80211_do_assoc(sdata
)) {
3833 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3835 ieee80211_destroy_assoc_data(sdata
, false);
3836 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3838 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3839 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3841 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3842 ifmgd
->associated
) {
3846 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3848 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3849 max_tries
= max_nullfunc_tries
;
3851 max_tries
= max_probe_tries
;
3853 /* ACK received for nullfunc probing frame */
3854 if (!ifmgd
->probe_send_count
)
3855 ieee80211_reset_ap_probe(sdata
);
3856 else if (ifmgd
->nullfunc_failed
) {
3857 if (ifmgd
->probe_send_count
< max_tries
) {
3859 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3860 bssid
, ifmgd
->probe_send_count
,
3862 ieee80211_mgd_probe_ap_send(sdata
);
3865 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3867 ieee80211_sta_connection_lost(sdata
, bssid
,
3868 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3871 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3872 run_again(sdata
, ifmgd
->probe_timeout
);
3873 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3875 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3876 bssid
, probe_wait_ms
);
3877 ieee80211_sta_connection_lost(sdata
, bssid
,
3878 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3879 } else if (ifmgd
->probe_send_count
< max_tries
) {
3881 "No probe response from AP %pM after %dms, try %d/%i\n",
3882 bssid
, probe_wait_ms
,
3883 ifmgd
->probe_send_count
, max_tries
);
3884 ieee80211_mgd_probe_ap_send(sdata
);
3887 * We actually lost the connection ... or did we?
3890 wiphy_debug(local
->hw
.wiphy
,
3891 "%s: No probe response from AP %pM"
3892 " after %dms, disconnecting.\n",
3894 bssid
, probe_wait_ms
);
3896 ieee80211_sta_connection_lost(sdata
, bssid
,
3897 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3901 sdata_unlock(sdata
);
3904 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3906 struct ieee80211_sub_if_data
*sdata
=
3907 (struct ieee80211_sub_if_data
*) data
;
3908 struct ieee80211_local
*local
= sdata
->local
;
3909 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3911 if (local
->quiescing
)
3914 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3917 sdata
->u
.mgd
.connection_loss
= false;
3918 ieee80211_queue_work(&sdata
->local
->hw
,
3919 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3922 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3924 struct ieee80211_sub_if_data
*sdata
=
3925 (struct ieee80211_sub_if_data
*) data
;
3926 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3927 struct ieee80211_local
*local
= sdata
->local
;
3929 if (local
->quiescing
)
3932 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3935 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3938 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3940 struct ieee80211_sub_if_data
*sdata
=
3941 container_of(work
, struct ieee80211_sub_if_data
,
3942 u
.mgd
.monitor_work
);
3944 ieee80211_mgd_probe_ap(sdata
, false);
3947 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3951 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3952 __ieee80211_stop_poll(sdata
);
3954 /* let's probe the connection once */
3955 flags
= sdata
->local
->hw
.flags
;
3956 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3957 ieee80211_queue_work(&sdata
->local
->hw
,
3958 &sdata
->u
.mgd
.monitor_work
);
3959 /* and do all the other regular work too */
3960 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3965 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data
*sdata
)
3967 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3968 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3972 if (ifmgd
->auth_data
|| ifmgd
->assoc_data
) {
3973 const u8
*bssid
= ifmgd
->auth_data
?
3974 ifmgd
->auth_data
->bss
->bssid
:
3975 ifmgd
->assoc_data
->bss
->bssid
;
3978 * If we are trying to authenticate / associate while suspending,
3979 * cfg80211 won't know and won't actually abort those attempts,
3980 * thus we need to do that ourselves.
3982 ieee80211_send_deauth_disassoc(sdata
, bssid
,
3983 IEEE80211_STYPE_DEAUTH
,
3984 WLAN_REASON_DEAUTH_LEAVING
,
3986 if (ifmgd
->assoc_data
)
3987 ieee80211_destroy_assoc_data(sdata
, false);
3988 if (ifmgd
->auth_data
)
3989 ieee80211_destroy_auth_data(sdata
, false);
3990 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3991 IEEE80211_DEAUTH_FRAME_LEN
);
3994 sdata_unlock(sdata
);
3997 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3999 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4002 if (!ifmgd
->associated
) {
4003 sdata_unlock(sdata
);
4007 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
4008 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
4009 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
4010 ieee80211_sta_connection_lost(sdata
,
4011 ifmgd
->associated
->bssid
,
4012 WLAN_REASON_UNSPECIFIED
,
4014 sdata_unlock(sdata
);
4017 sdata_unlock(sdata
);
4021 /* interface setup */
4022 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
4024 struct ieee80211_if_managed
*ifmgd
;
4026 ifmgd
= &sdata
->u
.mgd
;
4027 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
4028 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
4029 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
4030 ieee80211_beacon_connection_loss_work
);
4031 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
4032 ieee80211_csa_connection_drop_work
);
4033 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
4034 INIT_DELAYED_WORK(&ifmgd
->tdls_peer_del_work
,
4035 ieee80211_tdls_peer_del_work
);
4036 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
4037 (unsigned long) sdata
);
4038 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
4039 (unsigned long) sdata
);
4040 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
4041 (unsigned long) sdata
);
4042 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
4043 (unsigned long) sdata
);
4044 INIT_DELAYED_WORK(&ifmgd
->tx_tspec_wk
,
4045 ieee80211_sta_handle_tspec_ac_params_wk
);
4048 ifmgd
->powersave
= sdata
->wdev
.ps
;
4049 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
4050 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
4051 ifmgd
->p2p_noa_index
= -1;
4053 if (sdata
->local
->hw
.wiphy
->features
& NL80211_FEATURE_DYNAMIC_SMPS
)
4054 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
4056 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
4058 /* Setup TDLS data */
4059 spin_lock_init(&ifmgd
->teardown_lock
);
4060 ifmgd
->teardown_skb
= NULL
;
4061 ifmgd
->orig_teardown_skb
= NULL
;
4064 /* scan finished notification */
4065 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
4067 struct ieee80211_sub_if_data
*sdata
;
4069 /* Restart STA timers */
4071 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4072 if (ieee80211_sdata_running(sdata
))
4073 ieee80211_restart_sta_timer(sdata
);
4078 int ieee80211_max_network_latency(struct notifier_block
*nb
,
4079 unsigned long data
, void *dummy
)
4081 s32 latency_usec
= (s32
) data
;
4082 struct ieee80211_local
*local
=
4083 container_of(nb
, struct ieee80211_local
,
4084 network_latency_notifier
);
4086 mutex_lock(&local
->iflist_mtx
);
4087 ieee80211_recalc_ps(local
, latency_usec
);
4088 mutex_unlock(&local
->iflist_mtx
);
4093 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
4094 struct cfg80211_bss
*cbss
)
4096 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4097 const u8
*ht_cap_ie
, *vht_cap_ie
;
4098 const struct ieee80211_ht_cap
*ht_cap
;
4099 const struct ieee80211_vht_cap
*vht_cap
;
4102 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
4105 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4106 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
4107 ht_cap
= (void *)(ht_cap_ie
+ 2);
4108 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
4110 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4111 * "Tx Unequal Modulation Supported" fields.
4115 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
4118 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4119 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
4123 vht_cap
= (void *)(vht_cap_ie
+ 2);
4124 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
4125 for (nss
= 8; nss
> 0; nss
--) {
4126 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
4127 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
4130 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4131 chains
= max(chains
, nss
);
4137 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
4138 struct cfg80211_bss
*cbss
)
4140 struct ieee80211_local
*local
= sdata
->local
;
4141 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4142 const struct ieee80211_ht_cap
*ht_cap
= NULL
;
4143 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
4144 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
4145 struct ieee80211_supported_band
*sband
;
4146 struct cfg80211_chan_def chandef
;
4149 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4151 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
4152 IEEE80211_STA_DISABLE_80P80MHZ
|
4153 IEEE80211_STA_DISABLE_160MHZ
);
4157 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
4158 sband
->ht_cap
.ht_supported
) {
4159 const u8
*ht_oper_ie
, *ht_cap_ie
;
4161 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
4162 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
4163 ht_oper
= (void *)(ht_oper_ie
+ 2);
4165 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4166 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
))
4167 ht_cap
= (void *)(ht_cap_ie
+ 2);
4170 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4175 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4176 sband
->vht_cap
.vht_supported
) {
4177 const u8
*vht_oper_ie
, *vht_cap
;
4179 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
4180 WLAN_EID_VHT_OPERATION
);
4181 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
4182 vht_oper
= (void *)(vht_oper_ie
+ 2);
4183 if (vht_oper
&& !ht_oper
) {
4186 "AP advertised VHT without HT, disabling both\n");
4187 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4188 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4191 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4192 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
4193 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4198 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
4200 ht_cap
, ht_oper
, vht_oper
,
4203 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
4208 /* will change later if needed */
4209 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4211 mutex_lock(&local
->mtx
);
4213 * If this fails (possibly due to channel context sharing
4214 * on incompatible channels, e.g. 80+80 and 160 sharing the
4215 * same control channel) try to use a smaller bandwidth.
4217 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4218 IEEE80211_CHANCTX_SHARED
);
4220 /* don't downgrade for 5 and 10 MHz channels, though. */
4221 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
4222 chandef
.width
== NL80211_CHAN_WIDTH_10
)
4225 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
4226 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
4227 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4228 IEEE80211_CHANCTX_SHARED
);
4231 mutex_unlock(&local
->mtx
);
4235 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
4236 struct cfg80211_bss
*cbss
, bool assoc
)
4238 struct ieee80211_local
*local
= sdata
->local
;
4239 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4240 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
4241 struct sta_info
*new_sta
= NULL
;
4242 struct ieee80211_supported_band
*sband
;
4243 struct ieee80211_sta_ht_cap sta_ht_cap
;
4244 bool have_sta
= false, is_override
= false;
4247 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4249 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
4254 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
4259 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
4264 memcpy(&sta_ht_cap
, &sband
->ht_cap
, sizeof(sta_ht_cap
));
4265 ieee80211_apply_htcap_overrides(sdata
, &sta_ht_cap
);
4267 is_override
= (sta_ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) !=
4268 (sband
->ht_cap
.cap
&
4269 IEEE80211_HT_CAP_SUP_WIDTH_20_40
);
4271 if (new_sta
|| is_override
) {
4272 err
= ieee80211_prep_channel(sdata
, cbss
);
4275 sta_info_free(local
, new_sta
);
4281 u32 rates
= 0, basic_rates
= 0;
4282 bool have_higher_than_11mbit
;
4283 int min_rate
= INT_MAX
, min_rate_index
= -1;
4284 struct ieee80211_chanctx_conf
*chanctx_conf
;
4285 const struct cfg80211_bss_ies
*ies
;
4286 int shift
= ieee80211_vif_get_shift(&sdata
->vif
);
4290 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4291 if (WARN_ON(!chanctx_conf
)) {
4293 sta_info_free(local
, new_sta
);
4296 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
4299 ieee80211_get_rates(sband
, bss
->supp_rates
,
4300 bss
->supp_rates_len
,
4301 &rates
, &basic_rates
,
4302 &have_higher_than_11mbit
,
4303 &min_rate
, &min_rate_index
,
4307 * This used to be a workaround for basic rates missing
4308 * in the association response frame. Now that we no
4309 * longer use the basic rates from there, it probably
4310 * doesn't happen any more, but keep the workaround so
4311 * in case some *other* APs are buggy in different ways
4312 * we can connect -- with a warning.
4314 if (!basic_rates
&& min_rate_index
>= 0) {
4316 "No basic rates, using min rate instead\n");
4317 basic_rates
= BIT(min_rate_index
);
4320 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
4321 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
4323 /* cf. IEEE 802.11 9.2.12 */
4324 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
4325 have_higher_than_11mbit
)
4326 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
4328 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
4330 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
4332 /* set timing information */
4333 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
4335 ies
= rcu_dereference(cbss
->beacon_ies
);
4339 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4340 sdata
->vif
.bss_conf
.sync_device_ts
=
4341 bss
->device_ts_beacon
;
4342 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4343 ies
->data
, ies
->len
);
4344 if (tim_ie
&& tim_ie
[1] >= 2)
4345 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
4347 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4348 } else if (!(local
->hw
.flags
&
4349 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
4350 ies
= rcu_dereference(cbss
->proberesp_ies
);
4351 /* must be non-NULL since beacon IEs were NULL */
4352 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4353 sdata
->vif
.bss_conf
.sync_device_ts
=
4354 bss
->device_ts_presp
;
4355 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4357 sdata
->vif
.bss_conf
.sync_tsf
= 0;
4358 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
4359 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4363 /* tell driver about BSSID, basic rates and timing */
4364 ieee80211_bss_info_change_notify(sdata
,
4365 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
4366 BSS_CHANGED_BEACON_INT
);
4369 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
4371 err
= sta_info_insert(new_sta
);
4375 "failed to insert STA entry for the AP (error %d)\n",
4380 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4386 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4387 struct cfg80211_auth_request
*req
)
4389 struct ieee80211_local
*local
= sdata
->local
;
4390 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4391 struct ieee80211_mgd_auth_data
*auth_data
;
4395 /* prepare auth data structure */
4397 switch (req
->auth_type
) {
4398 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4399 auth_alg
= WLAN_AUTH_OPEN
;
4401 case NL80211_AUTHTYPE_SHARED_KEY
:
4402 if (IS_ERR(local
->wep_tx_tfm
))
4404 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4406 case NL80211_AUTHTYPE_FT
:
4407 auth_alg
= WLAN_AUTH_FT
;
4409 case NL80211_AUTHTYPE_NETWORK_EAP
:
4410 auth_alg
= WLAN_AUTH_LEAP
;
4412 case NL80211_AUTHTYPE_SAE
:
4413 auth_alg
= WLAN_AUTH_SAE
;
4419 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4420 req
->ie_len
, GFP_KERNEL
);
4424 auth_data
->bss
= req
->bss
;
4426 if (req
->sae_data_len
>= 4) {
4427 __le16
*pos
= (__le16
*) req
->sae_data
;
4428 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4429 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4430 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4431 req
->sae_data_len
- 4);
4432 auth_data
->data_len
+= req
->sae_data_len
- 4;
4435 if (req
->ie
&& req
->ie_len
) {
4436 memcpy(&auth_data
->data
[auth_data
->data_len
],
4437 req
->ie
, req
->ie_len
);
4438 auth_data
->data_len
+= req
->ie_len
;
4441 if (req
->key
&& req
->key_len
) {
4442 auth_data
->key_len
= req
->key_len
;
4443 auth_data
->key_idx
= req
->key_idx
;
4444 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4447 auth_data
->algorithm
= auth_alg
;
4449 /* try to authenticate/probe */
4451 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4452 ifmgd
->assoc_data
) {
4457 if (ifmgd
->auth_data
)
4458 ieee80211_destroy_auth_data(sdata
, false);
4460 /* prep auth_data so we don't go into idle on disassoc */
4461 ifmgd
->auth_data
= auth_data
;
4463 if (ifmgd
->associated
) {
4464 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4466 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4467 WLAN_REASON_UNSPECIFIED
,
4470 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4474 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4476 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
4480 err
= ieee80211_probe_auth(sdata
);
4482 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4486 /* hold our own reference */
4487 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4491 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4492 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4493 ifmgd
->auth_data
= NULL
;
4499 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data
*sdata
,
4500 const u8
*wmm_param
, int len
)
4508 if (wmm_param
[5] != 1 /* version */)
4511 pos
= wmm_param
+ 8;
4514 for (; left
>= 4; left
-= 4, pos
+= 4) {
4515 u8 aifsn
= pos
[0] & 0x0f;
4516 u8 ecwmin
= pos
[1] & 0x0f;
4517 u8 ecwmax
= (pos
[1] & 0xf0) >> 4;
4518 int aci
= (pos
[0] >> 5) & 0x03;
4522 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4526 if (ecwmin
> ecwmax
) {
4528 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4529 ecwmin
, ecwmax
, aci
);
4537 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4538 struct cfg80211_assoc_request
*req
)
4540 struct ieee80211_local
*local
= sdata
->local
;
4541 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4542 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4543 struct ieee80211_mgd_assoc_data
*assoc_data
;
4544 const struct cfg80211_bss_ies
*beacon_ies
;
4545 struct ieee80211_supported_band
*sband
;
4546 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4549 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4554 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4560 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4561 assoc_data
->ssid_len
= ssidie
[1];
4564 if (ifmgd
->associated
) {
4565 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4567 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4568 WLAN_REASON_UNSPECIFIED
,
4571 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4575 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4580 if (ifmgd
->assoc_data
) {
4585 if (ifmgd
->auth_data
) {
4588 /* keep sta info, bssid if matching */
4589 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4590 ieee80211_destroy_auth_data(sdata
, match
);
4593 /* prepare assoc data */
4595 ifmgd
->beacon_crc_valid
= false;
4597 assoc_data
->wmm
= bss
->wmm_used
&&
4598 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4599 if (assoc_data
->wmm
) {
4600 /* try to check validity of WMM params IE */
4601 const struct cfg80211_bss_ies
*ies
;
4602 const u8
*wp
, *start
, *end
;
4605 ies
= rcu_dereference(req
->bss
->ies
);
4607 end
= start
+ ies
->len
;
4610 wp
= cfg80211_find_vendor_ie(
4612 WLAN_OUI_TYPE_MICROSOFT_WMM
,
4613 start
, end
- start
);
4616 start
= wp
+ wp
[1] + 2;
4617 /* if this IE is too short, try the next */
4620 /* if this IE is WMM params, we found what we wanted */
4625 if (!wp
|| !ieee80211_usable_wmm_params(sdata
, wp
+ 2,
4627 assoc_data
->wmm
= false;
4628 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
4634 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4635 * We still associate in non-HT mode (11a/b/g) if any one of these
4636 * ciphers is configured as pairwise.
4637 * We can set this to true for non-11n hardware, that'll be checked
4638 * separately along with the peer capabilities.
4640 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4641 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4642 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4643 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4644 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4645 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4646 netdev_info(sdata
->dev
,
4647 "disabling HT/VHT due to WEP/TKIP use\n");
4651 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4652 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4653 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4656 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4657 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4659 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4660 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4661 if (!sband
->ht_cap
.ht_supported
||
4662 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4663 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4664 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4665 if (!bss
->wmm_used
&&
4666 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4667 netdev_info(sdata
->dev
,
4668 "disabling HT as WMM/QoS is not supported by the AP\n");
4671 /* disable VHT if we don't support it or the AP doesn't use WMM */
4672 if (!sband
->vht_cap
.vht_supported
||
4673 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4674 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4675 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4676 if (!bss
->wmm_used
&&
4677 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4678 netdev_info(sdata
->dev
,
4679 "disabling VHT as WMM/QoS is not supported by the AP\n");
4682 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4683 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4684 sizeof(ifmgd
->ht_capa_mask
));
4686 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4687 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4688 sizeof(ifmgd
->vht_capa_mask
));
4690 if (req
->ie
&& req
->ie_len
) {
4691 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4692 assoc_data
->ie_len
= req
->ie_len
;
4695 assoc_data
->bss
= req
->bss
;
4697 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4698 if (ifmgd
->powersave
)
4699 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4701 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4703 sdata
->smps_mode
= ifmgd
->req_smps
;
4705 assoc_data
->capability
= req
->bss
->capability
;
4706 assoc_data
->supp_rates
= bss
->supp_rates
;
4707 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4710 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4711 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4712 assoc_data
->ap_ht_param
=
4713 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4715 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4716 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4717 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4718 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4719 sizeof(struct ieee80211_vht_cap
));
4721 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4724 if (WARN((sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
) &&
4725 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
4726 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4727 sdata
->vif
.driver_flags
&= ~IEEE80211_VIF_SUPPORTS_UAPSD
;
4729 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4730 (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_UAPSD
)) {
4731 assoc_data
->uapsd
= true;
4732 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4734 assoc_data
->uapsd
= false;
4735 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4738 if (req
->prev_bssid
)
4739 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4742 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4743 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4745 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4746 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4749 if (req
->flags
& ASSOC_REQ_USE_RRM
)
4750 ifmgd
->flags
|= IEEE80211_STA_ENABLE_RRM
;
4752 ifmgd
->flags
&= ~IEEE80211_STA_ENABLE_RRM
;
4754 if (req
->crypto
.control_port
)
4755 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4757 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4759 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4760 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4761 sdata
->encrypt_headroom
= ieee80211_cs_headroom(local
, &req
->crypto
,
4764 /* kick off associate process */
4766 ifmgd
->assoc_data
= assoc_data
;
4767 ifmgd
->dtim_period
= 0;
4768 ifmgd
->have_beacon
= false;
4770 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4775 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4777 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4780 * Wait up to one beacon interval ...
4781 * should this be more if we miss one?
4783 sdata_info(sdata
, "waiting for beacon from %pM\n",
4785 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4786 assoc_data
->timeout_started
= true;
4787 assoc_data
->need_beacon
= true;
4788 } else if (beacon_ies
) {
4789 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4794 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4795 const struct ieee80211_tim_ie
*tim
;
4796 tim
= (void *)(tim_ie
+ 2);
4797 ifmgd
->dtim_period
= tim
->dtim_period
;
4798 dtim_count
= tim
->dtim_count
;
4800 ifmgd
->have_beacon
= true;
4801 assoc_data
->timeout
= jiffies
;
4802 assoc_data
->timeout_started
= true;
4804 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4805 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4806 sdata
->vif
.bss_conf
.sync_device_ts
=
4807 bss
->device_ts_beacon
;
4808 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4811 assoc_data
->timeout
= jiffies
;
4812 assoc_data
->timeout_started
= true;
4816 run_again(sdata
, assoc_data
->timeout
);
4818 if (bss
->corrupt_data
) {
4819 char *corrupt_type
= "data";
4820 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4821 if (bss
->corrupt_data
&
4822 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4823 corrupt_type
= "beacon and probe response";
4825 corrupt_type
= "beacon";
4826 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4827 corrupt_type
= "probe response";
4828 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4834 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4835 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4836 ifmgd
->assoc_data
= NULL
;
4842 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4843 struct cfg80211_deauth_request
*req
)
4845 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4846 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4847 bool tx
= !req
->local_state_change
;
4849 if (ifmgd
->auth_data
&&
4850 ether_addr_equal(ifmgd
->auth_data
->bss
->bssid
, req
->bssid
)) {
4852 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4853 req
->bssid
, req
->reason_code
,
4854 ieee80211_get_reason_code_string(req
->reason_code
));
4856 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4857 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4858 IEEE80211_STYPE_DEAUTH
,
4859 req
->reason_code
, tx
,
4861 ieee80211_destroy_auth_data(sdata
, false);
4862 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4863 IEEE80211_DEAUTH_FRAME_LEN
);
4868 if (ifmgd
->associated
&&
4869 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4871 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4872 req
->bssid
, req
->reason_code
,
4873 ieee80211_get_reason_code_string(req
->reason_code
));
4875 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4876 req
->reason_code
, tx
, frame_buf
);
4877 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4878 IEEE80211_DEAUTH_FRAME_LEN
);
4885 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4886 struct cfg80211_disassoc_request
*req
)
4888 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4890 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4893 * cfg80211 should catch this ... but it's racy since
4894 * we can receive a disassoc frame, process it, hand it
4895 * to cfg80211 while that's in a locked section already
4896 * trying to tell us that the user wants to disconnect.
4898 if (ifmgd
->associated
!= req
->bss
)
4902 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4903 req
->bss
->bssid
, req
->reason_code
, ieee80211_get_reason_code_string(req
->reason_code
));
4905 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4906 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4907 req
->reason_code
, !req
->local_state_change
,
4910 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4911 IEEE80211_DEAUTH_FRAME_LEN
);
4916 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4918 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4921 * Make sure some work items will not run after this,
4922 * they will not do anything but might not have been
4923 * cancelled when disconnecting.
4925 cancel_work_sync(&ifmgd
->monitor_work
);
4926 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4927 cancel_work_sync(&ifmgd
->request_smps_work
);
4928 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4929 cancel_work_sync(&ifmgd
->chswitch_work
);
4930 cancel_delayed_work_sync(&ifmgd
->tdls_peer_del_work
);
4933 if (ifmgd
->assoc_data
) {
4934 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
4935 ieee80211_destroy_assoc_data(sdata
, false);
4936 cfg80211_assoc_timeout(sdata
->dev
, bss
);
4938 if (ifmgd
->auth_data
)
4939 ieee80211_destroy_auth_data(sdata
, false);
4940 spin_lock_bh(&ifmgd
->teardown_lock
);
4941 if (ifmgd
->teardown_skb
) {
4942 kfree_skb(ifmgd
->teardown_skb
);
4943 ifmgd
->teardown_skb
= NULL
;
4944 ifmgd
->orig_teardown_skb
= NULL
;
4946 spin_unlock_bh(&ifmgd
->teardown_lock
);
4947 del_timer_sync(&ifmgd
->timer
);
4948 sdata_unlock(sdata
);
4951 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4952 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4955 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4957 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4959 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4961 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
4963 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif
*vif
, gfp_t gfp
)
4965 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4967 trace_api_cqm_beacon_loss_notify(sdata
->local
, sdata
);
4969 cfg80211_cqm_beacon_loss_notify(sdata
->dev
, gfp
);
4971 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify
);