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
;
162 chandef
->chan
= channel
;
163 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
164 chandef
->center_freq1
= channel
->center_freq
;
165 chandef
->center_freq2
= 0;
167 if (!ht_cap
|| !ht_oper
|| !sband
->ht_cap
.ht_supported
) {
168 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
172 chandef
->width
= NL80211_CHAN_WIDTH_20
;
174 if (!(ht_cap
->cap_info
&
175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40
))) {
176 ret
= IEEE80211_STA_DISABLE_40MHZ
;
180 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
182 /* check that channel matches the right operating channel */
183 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel
->center_freq
, ht_cfreq
,
194 ht_oper
->primary_chan
, channel
->band
);
195 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
199 /* check 40 MHz support, if we have it */
200 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
201 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
203 chandef
->width
= NL80211_CHAN_WIDTH_40
;
204 chandef
->center_freq1
+= 10;
206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
207 chandef
->width
= NL80211_CHAN_WIDTH_40
;
208 chandef
->center_freq1
-= 10;
212 /* 40 MHz (and 80 MHz) must be supported for VHT */
213 ret
= IEEE80211_STA_DISABLE_VHT
;
214 /* also mark 40 MHz disabled */
215 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
219 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
220 ret
= IEEE80211_STA_DISABLE_VHT
;
224 vht_chandef
.chan
= channel
;
225 vht_chandef
.center_freq1
=
226 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
228 vht_chandef
.center_freq2
= 0;
230 switch (vht_oper
->chan_width
) {
231 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
232 vht_chandef
.width
= chandef
->width
;
233 vht_chandef
.center_freq1
= chandef
->center_freq1
;
235 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
236 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
238 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
239 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
242 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
243 vht_chandef
.center_freq2
=
244 ieee80211_channel_to_frequency(
245 vht_oper
->center_freq_seg2_idx
,
249 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
252 vht_oper
->chan_width
);
253 ret
= IEEE80211_STA_DISABLE_VHT
;
257 if (!cfg80211_chandef_valid(&vht_chandef
)) {
258 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
260 "AP VHT information is invalid, disable VHT\n");
261 ret
= IEEE80211_STA_DISABLE_VHT
;
265 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
270 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
271 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
273 "AP VHT information doesn't match HT, disable VHT\n");
274 ret
= IEEE80211_STA_DISABLE_VHT
;
278 *chandef
= vht_chandef
;
284 * When tracking the current AP, don't do any further checks if the
285 * new chandef is identical to the one we're currently using for the
286 * connection. This keeps us from playing ping-pong with regulatory,
287 * without it the following can happen (for example):
288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
289 * - AP advertises regdom US
290 * - CRDA loads regdom US with 80 MHz prohibited (old database)
291 * - the code below detects an unsupported channel, downgrades, and
292 * we disconnect from the AP in the caller
293 * - disconnect causes CRDA to reload world regdomain and the game
295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
297 * It seems possible that there are still scenarios with CSA or real
298 * bandwidth changes where a this could happen, but those cases are
299 * less common and wouldn't completely prevent using the AP.
302 cfg80211_chandef_identical(chandef
, &sdata
->vif
.bss_conf
.chandef
))
305 /* don't print the message below for VHT mismatch if VHT is disabled */
306 if (ret
& IEEE80211_STA_DISABLE_VHT
)
307 vht_chandef
= *chandef
;
310 * Ignore the DISABLED flag when we're already connected and only
311 * tracking the APs beacon for bandwidth changes - otherwise we
312 * might get disconnected here if we connect to an AP, update our
313 * regulatory information based on the AP's country IE and the
314 * information we have is wrong/outdated and disables the channel
315 * that we're actually using for the connection to the AP.
317 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
319 IEEE80211_CHAN_DISABLED
)) {
320 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
321 ret
= IEEE80211_STA_DISABLE_HT
|
322 IEEE80211_STA_DISABLE_VHT
;
326 ret
|= ieee80211_chandef_downgrade(chandef
);
329 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
337 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
338 struct sta_info
*sta
,
339 const struct ieee80211_ht_cap
*ht_cap
,
340 const struct ieee80211_ht_operation
*ht_oper
,
341 const struct ieee80211_vht_operation
*vht_oper
,
342 const u8
*bssid
, u32
*changed
)
344 struct ieee80211_local
*local
= sdata
->local
;
345 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
346 struct ieee80211_supported_band
*sband
;
347 struct ieee80211_channel
*chan
;
348 struct cfg80211_chan_def chandef
;
351 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
354 /* if HT was/is disabled, don't track any bandwidth changes */
355 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
358 /* don't check VHT if we associated as non-VHT station */
359 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
362 if (WARN_ON_ONCE(!sta
))
366 * if bss configuration changed store the new one -
367 * this may be applicable even if channel is identical
369 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
370 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
371 *changed
|= BSS_CHANGED_HT
;
372 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
375 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
376 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
378 /* calculate new channel (type) based on HT/VHT operation IEs */
379 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
,
380 ht_cap
, ht_oper
, vht_oper
,
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
390 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
391 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
392 flags
|= ieee80211_chandef_downgrade(&chandef
);
393 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
394 chandef
.width
== NL80211_CHAN_WIDTH_160
)
395 flags
|= ieee80211_chandef_downgrade(&chandef
);
396 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
397 chandef
.width
> NL80211_CHAN_WIDTH_20
)
398 flags
|= ieee80211_chandef_downgrade(&chandef
);
400 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
406 chandef
.center_freq1
, chandef
.center_freq2
);
408 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
409 IEEE80211_STA_DISABLE_VHT
|
410 IEEE80211_STA_DISABLE_40MHZ
|
411 IEEE80211_STA_DISABLE_80P80MHZ
|
412 IEEE80211_STA_DISABLE_160MHZ
)) ||
413 !cfg80211_chandef_valid(&chandef
)) {
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
420 switch (chandef
.width
) {
421 case NL80211_CHAN_WIDTH_20_NOHT
:
422 case NL80211_CHAN_WIDTH_20
:
423 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
425 case NL80211_CHAN_WIDTH_40
:
426 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
428 case NL80211_CHAN_WIDTH_80
:
429 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
431 case NL80211_CHAN_WIDTH_80P80
:
432 case NL80211_CHAN_WIDTH_160
:
433 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
439 if (new_sta_bw
> sta
->cur_max_bandwidth
)
440 new_sta_bw
= sta
->cur_max_bandwidth
;
442 if (new_sta_bw
< sta
->sta
.bandwidth
) {
443 sta
->sta
.bandwidth
= new_sta_bw
;
444 rate_control_rate_update(local
, sband
, sta
,
445 IEEE80211_RC_BW_CHANGED
);
448 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
456 if (new_sta_bw
> sta
->sta
.bandwidth
) {
457 sta
->sta
.bandwidth
= new_sta_bw
;
458 rate_control_rate_update(local
, sband
, sta
,
459 IEEE80211_RC_BW_CHANGED
);
465 /* frame sending functions */
467 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
468 struct sk_buff
*skb
, u8 ap_ht_param
,
469 struct ieee80211_supported_band
*sband
,
470 struct ieee80211_channel
*channel
,
471 enum ieee80211_smps_mode smps
)
474 u32 flags
= channel
->flags
;
476 struct ieee80211_sta_ht_cap ht_cap
;
478 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
480 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
481 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
483 /* determine capability flags */
486 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
488 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
489 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
490 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
494 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
495 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
496 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
502 * If 40 MHz was disabled associate as though we weren't
503 * capable of 40 MHz -- some broken APs will never fall
504 * back to trying to transmit in 20 MHz.
506 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
507 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
508 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
511 /* set SM PS mode properly */
512 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
514 case IEEE80211_SMPS_AUTOMATIC
:
515 case IEEE80211_SMPS_NUM_MODES
:
517 case IEEE80211_SMPS_OFF
:
518 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
519 IEEE80211_HT_CAP_SM_PS_SHIFT
;
521 case IEEE80211_SMPS_STATIC
:
522 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
523 IEEE80211_HT_CAP_SM_PS_SHIFT
;
525 case IEEE80211_SMPS_DYNAMIC
:
526 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
527 IEEE80211_HT_CAP_SM_PS_SHIFT
;
531 /* reserve and fill IE */
532 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
533 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
536 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
538 struct ieee80211_supported_band
*sband
,
539 struct ieee80211_vht_cap
*ap_vht_cap
)
543 struct ieee80211_sta_vht_cap vht_cap
;
544 u32 mask
, ap_bf_sts
, our_bf_sts
;
546 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
548 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
549 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
551 /* determine capability flags */
554 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
555 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
;
556 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
559 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
560 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
561 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
565 * Some APs apparently get confused if our capabilities are better
566 * than theirs, so restrict what we advertise in the assoc request.
568 if (!(ap_vht_cap
->vht_cap_info
&
569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
570 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
572 mask
= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK
;
574 ap_bf_sts
= le32_to_cpu(ap_vht_cap
->vht_cap_info
) & mask
;
575 our_bf_sts
= cap
& mask
;
577 if (ap_bf_sts
< our_bf_sts
) {
582 /* reserve and fill IE */
583 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
584 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
587 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
589 struct ieee80211_local
*local
= sdata
->local
;
590 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
591 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
593 struct ieee80211_mgmt
*mgmt
;
595 size_t offset
= 0, noffset
;
596 int i
, count
, rates_len
, supp_rates_len
, shift
;
598 struct ieee80211_supported_band
*sband
;
599 struct ieee80211_chanctx_conf
*chanctx_conf
;
600 struct ieee80211_channel
*chan
;
601 u32 rate_flags
, rates
= 0;
603 sdata_assert_lock(sdata
);
606 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
607 if (WARN_ON(!chanctx_conf
)) {
611 chan
= chanctx_conf
->def
.chan
;
612 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
614 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
615 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
617 if (assoc_data
->supp_rates_len
) {
619 * Get all rates supported by the device and the AP as
620 * some APs don't like getting a superset of their rates
621 * in the association request (e.g. D-Link DAP 1353 in
624 rates_len
= ieee80211_parse_bitrates(&chanctx_conf
->def
, sband
,
625 assoc_data
->supp_rates
,
626 assoc_data
->supp_rates_len
,
630 * In case AP not provide any supported rates information
631 * before association, we send information element(s) with
632 * all rates that we support.
635 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
636 if ((rate_flags
& sband
->bitrates
[i
].flags
)
644 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
645 sizeof(*mgmt
) + /* bit too much but doesn't matter */
646 2 + assoc_data
->ssid_len
+ /* SSID */
647 4 + rates_len
+ /* (extended) rates */
648 4 + /* power capability */
649 2 + 2 * sband
->n_channels
+ /* supported channels */
650 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
651 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
652 assoc_data
->ie_len
+ /* extra IEs */
658 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
660 capab
= WLAN_CAPABILITY_ESS
;
662 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
663 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
664 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
665 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
666 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
669 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
670 capab
|= WLAN_CAPABILITY_PRIVACY
;
672 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
673 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
674 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
676 if (ifmgd
->flags
& IEEE80211_STA_ENABLE_RRM
)
677 capab
|= WLAN_CAPABILITY_RADIO_MEASURE
;
679 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
681 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
682 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
683 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
685 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
687 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
688 IEEE80211_STYPE_REASSOC_REQ
);
689 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
690 mgmt
->u
.reassoc_req
.listen_interval
=
691 cpu_to_le16(local
->hw
.conf
.listen_interval
);
692 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
696 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
697 IEEE80211_STYPE_ASSOC_REQ
);
698 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
699 mgmt
->u
.assoc_req
.listen_interval
=
700 cpu_to_le16(local
->hw
.conf
.listen_interval
);
704 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
705 *pos
++ = WLAN_EID_SSID
;
706 *pos
++ = assoc_data
->ssid_len
;
707 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
709 /* add all rates which were marked to be used above */
710 supp_rates_len
= rates_len
;
711 if (supp_rates_len
> 8)
714 pos
= skb_put(skb
, supp_rates_len
+ 2);
715 *pos
++ = WLAN_EID_SUPP_RATES
;
716 *pos
++ = supp_rates_len
;
719 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
720 if (BIT(i
) & rates
) {
721 int rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
729 if (rates_len
> count
) {
730 pos
= skb_put(skb
, rates_len
- count
+ 2);
731 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
732 *pos
++ = rates_len
- count
;
734 for (i
++; i
< sband
->n_bitrates
; i
++) {
735 if (BIT(i
) & rates
) {
737 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
744 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
||
745 capab
& WLAN_CAPABILITY_RADIO_MEASURE
) {
746 pos
= skb_put(skb
, 4);
747 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
749 *pos
++ = 0; /* min tx power */
751 *pos
++ = ieee80211_chandef_max_power(&chanctx_conf
->def
);
754 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
755 /* TODO: get this in reg domain format */
756 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
757 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
758 *pos
++ = 2 * sband
->n_channels
;
759 for (i
= 0; i
< sband
->n_channels
; i
++) {
760 *pos
++ = ieee80211_frequency_to_channel(
761 sband
->channels
[i
].center_freq
);
762 *pos
++ = 1; /* one channel in the subband*/
766 /* if present, add any custom IEs that go before HT */
767 if (assoc_data
->ie_len
) {
768 static const u8 before_ht
[] = {
771 WLAN_EID_EXT_SUPP_RATES
,
772 WLAN_EID_PWR_CAPABILITY
,
773 WLAN_EID_SUPPORTED_CHANNELS
,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
777 WLAN_EID_MOBILITY_DOMAIN
,
778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
780 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
781 before_ht
, ARRAY_SIZE(before_ht
),
783 pos
= skb_put(skb
, noffset
- offset
);
784 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
788 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
789 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
790 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
792 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
793 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
794 sband
, chan
, sdata
->smps_mode
);
796 /* if present, add any custom IEs that go before VHT */
797 if (assoc_data
->ie_len
) {
798 static const u8 before_vht
[] = {
801 WLAN_EID_EXT_SUPP_RATES
,
802 WLAN_EID_PWR_CAPABILITY
,
803 WLAN_EID_SUPPORTED_CHANNELS
,
806 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
807 WLAN_EID_MOBILITY_DOMAIN
,
808 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
809 WLAN_EID_HT_CAPABILITY
,
810 WLAN_EID_BSS_COEX_2040
,
811 WLAN_EID_EXT_CAPABILITY
,
812 WLAN_EID_QOS_TRAFFIC_CAPA
,
813 WLAN_EID_TIM_BCAST_REQ
,
814 WLAN_EID_INTERWORKING
,
816 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
817 before_vht
, ARRAY_SIZE(before_vht
),
819 pos
= skb_put(skb
, noffset
- offset
);
820 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
824 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
825 ieee80211_add_vht_ie(sdata
, skb
, sband
,
826 &assoc_data
->ap_vht_cap
);
828 /* if present, add any custom non-vendor IEs that go after HT */
829 if (assoc_data
->ie_len
) {
830 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
833 pos
= skb_put(skb
, noffset
- offset
);
834 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
838 if (assoc_data
->wmm
) {
839 if (assoc_data
->uapsd
) {
840 qos_info
= ifmgd
->uapsd_queues
;
841 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
842 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
847 pos
= ieee80211_add_wmm_info_ie(skb_put(skb
, 9), qos_info
);
850 /* add any remaining custom (i.e. vendor specific here) IEs */
851 if (assoc_data
->ie_len
) {
852 noffset
= assoc_data
->ie_len
;
853 pos
= skb_put(skb
, noffset
- offset
);
854 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
857 drv_mgd_prepare_tx(local
, sdata
);
859 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
860 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
861 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
862 IEEE80211_TX_INTFL_MLME_CONN_TX
;
863 ieee80211_tx_skb(sdata
, skb
);
866 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
867 struct ieee80211_sub_if_data
*sdata
)
869 struct ieee80211_pspoll
*pspoll
;
872 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
876 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
877 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
879 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
880 ieee80211_tx_skb(sdata
, skb
);
883 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
884 struct ieee80211_sub_if_data
*sdata
,
888 struct ieee80211_hdr_3addr
*nullfunc
;
889 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
891 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
895 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
897 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
899 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
900 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
902 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
903 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
905 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
906 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
908 ieee80211_tx_skb(sdata
, skb
);
911 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
912 struct ieee80211_sub_if_data
*sdata
)
915 struct ieee80211_hdr
*nullfunc
;
918 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
921 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
925 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
927 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
928 memset(nullfunc
, 0, 30);
929 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
930 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
931 nullfunc
->frame_control
= fc
;
932 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
933 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
934 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
935 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
937 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
938 ieee80211_tx_skb(sdata
, skb
);
941 /* spectrum management related things */
942 static void ieee80211_chswitch_work(struct work_struct
*work
)
944 struct ieee80211_sub_if_data
*sdata
=
945 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
946 struct ieee80211_local
*local
= sdata
->local
;
947 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
950 if (!ieee80211_sdata_running(sdata
))
954 mutex_lock(&local
->mtx
);
955 mutex_lock(&local
->chanctx_mtx
);
957 if (!ifmgd
->associated
)
960 if (!sdata
->vif
.csa_active
)
964 * using reservation isn't immediate as it may be deferred until later
965 * with multi-vif. once reservation is complete it will re-schedule the
966 * work with no reserved_chanctx so verify chandef to check if it
967 * completed successfully
970 if (sdata
->reserved_chanctx
) {
972 * with multi-vif csa driver may call ieee80211_csa_finish()
973 * many times while waiting for other interfaces to use their
976 if (sdata
->reserved_ready
)
979 ret
= ieee80211_vif_use_reserved_context(sdata
);
982 "failed to use reserved channel context, disconnecting (err=%d)\n",
984 ieee80211_queue_work(&sdata
->local
->hw
,
985 &ifmgd
->csa_connection_drop_work
);
992 if (!cfg80211_chandef_identical(&sdata
->vif
.bss_conf
.chandef
,
993 &sdata
->csa_chandef
)) {
995 "failed to finalize channel switch, disconnecting\n");
996 ieee80211_queue_work(&sdata
->local
->hw
,
997 &ifmgd
->csa_connection_drop_work
);
1001 /* XXX: shouldn't really modify cfg80211-owned data! */
1002 ifmgd
->associated
->channel
= sdata
->csa_chandef
.chan
;
1004 sdata
->vif
.csa_active
= false;
1006 /* XXX: wait for a beacon first? */
1007 if (sdata
->csa_block_tx
) {
1008 ieee80211_wake_vif_queues(local
, sdata
,
1009 IEEE80211_QUEUE_STOP_REASON_CSA
);
1010 sdata
->csa_block_tx
= false;
1013 ieee80211_sta_reset_beacon_monitor(sdata
);
1014 ieee80211_sta_reset_conn_monitor(sdata
);
1017 mutex_unlock(&local
->chanctx_mtx
);
1018 mutex_unlock(&local
->mtx
);
1019 sdata_unlock(sdata
);
1022 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
1024 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1025 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1027 trace_api_chswitch_done(sdata
, success
);
1030 "driver channel switch failed, disconnecting\n");
1031 ieee80211_queue_work(&sdata
->local
->hw
,
1032 &ifmgd
->csa_connection_drop_work
);
1034 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1037 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1039 static void ieee80211_chswitch_timer(unsigned long data
)
1041 struct ieee80211_sub_if_data
*sdata
=
1042 (struct ieee80211_sub_if_data
*) data
;
1044 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1048 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1049 u64 timestamp
, struct ieee802_11_elems
*elems
,
1052 struct ieee80211_local
*local
= sdata
->local
;
1053 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1054 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1055 struct ieee80211_chanctx_conf
*conf
;
1056 struct ieee80211_chanctx
*chanctx
;
1057 enum ieee80211_band current_band
;
1058 struct ieee80211_csa_ie csa_ie
;
1061 sdata_assert_lock(sdata
);
1066 if (local
->scanning
)
1069 /* disregard subsequent announcements if we are already processing */
1070 if (sdata
->vif
.csa_active
)
1073 current_band
= cbss
->channel
->band
;
1074 memset(&csa_ie
, 0, sizeof(csa_ie
));
1075 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, beacon
, current_band
,
1077 ifmgd
->associated
->bssid
, &csa_ie
);
1079 ieee80211_queue_work(&local
->hw
,
1080 &ifmgd
->csa_connection_drop_work
);
1084 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
1085 IEEE80211_CHAN_DISABLED
)) {
1087 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1088 ifmgd
->associated
->bssid
,
1089 csa_ie
.chandef
.chan
->center_freq
,
1090 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
1091 csa_ie
.chandef
.center_freq2
);
1092 ieee80211_queue_work(&local
->hw
,
1093 &ifmgd
->csa_connection_drop_work
);
1097 mutex_lock(&local
->mtx
);
1098 mutex_lock(&local
->chanctx_mtx
);
1099 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1100 lockdep_is_held(&local
->chanctx_mtx
));
1103 "no channel context assigned to vif?, disconnecting\n");
1104 ieee80211_queue_work(&local
->hw
,
1105 &ifmgd
->csa_connection_drop_work
);
1106 mutex_unlock(&local
->chanctx_mtx
);
1107 mutex_unlock(&local
->mtx
);
1111 chanctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1113 if (local
->use_chanctx
) {
1114 u32 num_chanctx
= 0;
1115 list_for_each_entry(chanctx
, &local
->chanctx_list
, list
)
1118 if (num_chanctx
> 1 ||
1119 !(local
->hw
.flags
& IEEE80211_HW_CHANCTX_STA_CSA
)) {
1121 "not handling chan-switch with channel contexts\n");
1122 ieee80211_queue_work(&local
->hw
,
1123 &ifmgd
->csa_connection_drop_work
);
1124 mutex_unlock(&local
->chanctx_mtx
);
1125 mutex_unlock(&local
->mtx
);
1130 res
= ieee80211_vif_reserve_chanctx(sdata
, &csa_ie
.chandef
,
1131 chanctx
->mode
, false);
1134 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1136 ieee80211_queue_work(&local
->hw
,
1137 &ifmgd
->csa_connection_drop_work
);
1138 mutex_unlock(&local
->chanctx_mtx
);
1139 mutex_unlock(&local
->mtx
);
1142 mutex_unlock(&local
->chanctx_mtx
);
1144 sdata
->vif
.csa_active
= true;
1145 sdata
->csa_chandef
= csa_ie
.chandef
;
1146 sdata
->csa_block_tx
= csa_ie
.mode
;
1148 if (sdata
->csa_block_tx
)
1149 ieee80211_stop_vif_queues(local
, sdata
,
1150 IEEE80211_QUEUE_STOP_REASON_CSA
);
1151 mutex_unlock(&local
->mtx
);
1153 if (local
->ops
->channel_switch
) {
1154 /* use driver's channel switch callback */
1155 struct ieee80211_channel_switch ch_switch
= {
1156 .timestamp
= timestamp
,
1157 .block_tx
= csa_ie
.mode
,
1158 .chandef
= csa_ie
.chandef
,
1159 .count
= csa_ie
.count
,
1162 drv_channel_switch(local
, &ch_switch
);
1166 /* channel switch handled in software */
1167 if (csa_ie
.count
<= 1)
1168 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1170 mod_timer(&ifmgd
->chswitch_timer
,
1171 TU_TO_EXP_TIME(csa_ie
.count
* cbss
->beacon_interval
));
1175 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1176 struct ieee80211_channel
*channel
,
1177 const u8
*country_ie
, u8 country_ie_len
,
1178 const u8
*pwr_constr_elem
,
1179 int *chan_pwr
, int *pwr_reduction
)
1181 struct ieee80211_country_ie_triplet
*triplet
;
1182 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1183 int i
, chan_increment
;
1184 bool have_chan_pwr
= false;
1187 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1190 triplet
= (void *)(country_ie
+ 3);
1191 country_ie_len
-= 3;
1193 switch (channel
->band
) {
1197 case IEEE80211_BAND_2GHZ
:
1198 case IEEE80211_BAND_60GHZ
:
1201 case IEEE80211_BAND_5GHZ
:
1207 while (country_ie_len
>= 3) {
1208 u8 first_channel
= triplet
->chans
.first_channel
;
1210 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1213 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1214 if (first_channel
+ i
* chan_increment
== chan
) {
1215 have_chan_pwr
= true;
1216 *chan_pwr
= triplet
->chans
.max_power
;
1225 country_ie_len
-= 3;
1229 *pwr_reduction
= *pwr_constr_elem
;
1230 return have_chan_pwr
;
1233 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data
*sdata
,
1234 struct ieee80211_channel
*channel
,
1235 const u8
*cisco_dtpc_ie
,
1238 /* From practical testing, the first data byte of the DTPC element
1239 * seems to contain the requested dBm level, and the CLI on Cisco
1240 * APs clearly state the range is -127 to 127 dBm, which indicates
1241 * a signed byte, although it seemingly never actually goes negative.
1242 * The other byte seems to always be zero.
1244 *pwr_level
= (__s8
)cisco_dtpc_ie
[4];
1247 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1248 struct ieee80211_channel
*channel
,
1249 struct ieee80211_mgmt
*mgmt
,
1250 const u8
*country_ie
, u8 country_ie_len
,
1251 const u8
*pwr_constr_ie
,
1252 const u8
*cisco_dtpc_ie
)
1254 bool has_80211h_pwr
= false, has_cisco_pwr
= false;
1255 int chan_pwr
= 0, pwr_reduction_80211h
= 0;
1256 int pwr_level_cisco
, pwr_level_80211h
;
1259 if (country_ie
&& pwr_constr_ie
&&
1260 mgmt
->u
.probe_resp
.capab_info
&
1261 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
)) {
1262 has_80211h_pwr
= ieee80211_find_80211h_pwr_constr(
1263 sdata
, channel
, country_ie
, country_ie_len
,
1264 pwr_constr_ie
, &chan_pwr
, &pwr_reduction_80211h
);
1266 max_t(int, 0, chan_pwr
- pwr_reduction_80211h
);
1269 if (cisco_dtpc_ie
) {
1270 ieee80211_find_cisco_dtpc(
1271 sdata
, channel
, cisco_dtpc_ie
, &pwr_level_cisco
);
1272 has_cisco_pwr
= true;
1275 if (!has_80211h_pwr
&& !has_cisco_pwr
)
1278 /* If we have both 802.11h and Cisco DTPC, apply both limits
1279 * by picking the smallest of the two power levels advertised.
1281 if (has_80211h_pwr
&&
1282 (!has_cisco_pwr
|| pwr_level_80211h
<= pwr_level_cisco
)) {
1284 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1285 pwr_level_80211h
, chan_pwr
, pwr_reduction_80211h
,
1286 sdata
->u
.mgd
.bssid
);
1287 new_ap_level
= pwr_level_80211h
;
1288 } else { /* has_cisco_pwr is always true here. */
1290 "Limiting TX power to %d dBm as advertised by %pM\n",
1291 pwr_level_cisco
, sdata
->u
.mgd
.bssid
);
1292 new_ap_level
= pwr_level_cisco
;
1295 if (sdata
->ap_power_level
== new_ap_level
)
1298 sdata
->ap_power_level
= new_ap_level
;
1299 if (__ieee80211_recalc_txpower(sdata
))
1300 return BSS_CHANGED_TXPOWER
;
1305 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1306 struct ieee80211_sub_if_data
*sdata
)
1308 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1311 * If we are scanning right now then the parameters will
1312 * take effect when scan finishes.
1314 if (local
->scanning
)
1317 if (conf
->dynamic_ps_timeout
> 0 &&
1318 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1319 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1320 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1322 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1323 ieee80211_send_nullfunc(local
, sdata
, 1);
1325 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1326 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1329 conf
->flags
|= IEEE80211_CONF_PS
;
1330 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1334 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1336 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1338 if (local
->ps_sdata
) {
1339 ieee80211_enable_ps(local
, local
->ps_sdata
);
1340 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1341 conf
->flags
&= ~IEEE80211_CONF_PS
;
1342 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1343 del_timer_sync(&local
->dynamic_ps_timer
);
1344 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1348 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1350 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1351 struct sta_info
*sta
= NULL
;
1352 bool authorized
= false;
1354 if (!mgd
->powersave
)
1360 if (!mgd
->associated
)
1363 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1366 if (!mgd
->have_beacon
)
1370 sta
= sta_info_get(sdata
, mgd
->bssid
);
1372 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1378 /* need to hold RTNL or interface lock */
1379 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1381 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1385 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1386 local
->ps_sdata
= NULL
;
1390 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1391 if (!ieee80211_sdata_running(sdata
))
1393 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1394 /* If an AP vif is found, then disable PS
1395 * by setting the count to zero thereby setting
1401 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1407 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1411 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1413 beaconint_us
= ieee80211_tu_to_usec(
1414 found
->vif
.bss_conf
.beacon_int
);
1416 timeout
= local
->dynamic_ps_forced_timeout
;
1419 * Go to full PSM if the user configures a very low
1420 * latency requirement.
1421 * The 2000 second value is there for compatibility
1422 * until the PM_QOS_NETWORK_LATENCY is configured
1425 if (latency
> (1900 * USEC_PER_MSEC
) &&
1426 latency
!= (2000 * USEC_PER_SEC
))
1431 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1433 if (beaconint_us
> latency
) {
1434 local
->ps_sdata
= NULL
;
1437 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1439 /* If the TIM IE is invalid, pretend the value is 1 */
1442 else if (dtimper
> 1)
1443 maxslp
= min_t(int, dtimper
,
1444 latency
/ beaconint_us
);
1446 local
->hw
.conf
.max_sleep_period
= maxslp
;
1447 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1448 local
->ps_sdata
= found
;
1451 local
->ps_sdata
= NULL
;
1454 ieee80211_change_ps(local
);
1457 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1459 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1461 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1462 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1463 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1467 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1469 struct ieee80211_local
*local
=
1470 container_of(work
, struct ieee80211_local
,
1471 dynamic_ps_disable_work
);
1473 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1474 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1475 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1478 ieee80211_wake_queues_by_reason(&local
->hw
,
1479 IEEE80211_MAX_QUEUE_MAP
,
1480 IEEE80211_QUEUE_STOP_REASON_PS
,
1484 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1486 struct ieee80211_local
*local
=
1487 container_of(work
, struct ieee80211_local
,
1488 dynamic_ps_enable_work
);
1489 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1490 struct ieee80211_if_managed
*ifmgd
;
1491 unsigned long flags
;
1494 /* can only happen when PS was just disabled anyway */
1498 ifmgd
= &sdata
->u
.mgd
;
1500 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1503 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1504 /* don't enter PS if TX frames are pending */
1505 if (drv_tx_frames_pending(local
)) {
1506 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1508 local
->hw
.conf
.dynamic_ps_timeout
));
1513 * transmission can be stopped by others which leads to
1514 * dynamic_ps_timer expiry. Postpone the ps timer if it
1515 * is not the actual idle state.
1517 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1518 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1519 if (local
->queue_stop_reasons
[q
]) {
1520 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1522 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1524 local
->hw
.conf
.dynamic_ps_timeout
));
1528 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1531 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1532 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1533 if (drv_tx_frames_pending(local
)) {
1534 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1536 local
->hw
.conf
.dynamic_ps_timeout
));
1538 ieee80211_send_nullfunc(local
, sdata
, 1);
1539 /* Flush to get the tx status of nullfunc frame */
1540 ieee80211_flush_queues(local
, sdata
);
1544 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1545 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1546 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1547 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1548 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1549 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1553 void ieee80211_dynamic_ps_timer(unsigned long data
)
1555 struct ieee80211_local
*local
= (void *) data
;
1557 if (local
->quiescing
|| local
->suspended
)
1560 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1563 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1565 struct delayed_work
*delayed_work
=
1566 container_of(work
, struct delayed_work
, work
);
1567 struct ieee80211_sub_if_data
*sdata
=
1568 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1569 dfs_cac_timer_work
);
1570 struct cfg80211_chan_def chandef
= sdata
->vif
.bss_conf
.chandef
;
1572 mutex_lock(&sdata
->local
->mtx
);
1573 if (sdata
->wdev
.cac_started
) {
1574 ieee80211_vif_release_channel(sdata
);
1575 cfg80211_cac_event(sdata
->dev
, &chandef
,
1576 NL80211_RADAR_CAC_FINISHED
,
1579 mutex_unlock(&sdata
->local
->mtx
);
1583 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1584 struct ieee80211_sub_if_data
*sdata
,
1585 const u8
*wmm_param
, size_t wmm_param_len
)
1587 struct ieee80211_tx_queue_params params
;
1588 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1592 u8 uapsd_queues
= 0;
1594 if (!local
->ops
->conf_tx
)
1597 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1603 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1606 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1607 uapsd_queues
= ifmgd
->uapsd_queues
;
1609 count
= wmm_param
[6] & 0x0f;
1610 if (count
== ifmgd
->wmm_last_param_set
)
1612 ifmgd
->wmm_last_param_set
= count
;
1614 pos
= wmm_param
+ 8;
1615 left
= wmm_param_len
- 8;
1617 memset(¶ms
, 0, sizeof(params
));
1620 for (; left
>= 4; left
-= 4, pos
+= 4) {
1621 int aci
= (pos
[0] >> 5) & 0x03;
1622 int acm
= (pos
[0] >> 4) & 0x01;
1630 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1631 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1637 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1638 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1644 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1645 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1652 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1653 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1658 params
.aifs
= pos
[0] & 0x0f;
1659 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1660 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1661 params
.txop
= get_unaligned_le16(pos
+ 2);
1663 params
.uapsd
= uapsd
;
1666 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1668 params
.aifs
, params
.cw_min
, params
.cw_max
,
1669 params
.txop
, params
.uapsd
);
1670 sdata
->tx_conf
[queue
] = params
;
1671 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1673 "failed to set TX queue parameters for queue %d\n",
1677 /* enable WMM or activate new settings */
1678 sdata
->vif
.bss_conf
.qos
= true;
1682 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1684 lockdep_assert_held(&sdata
->local
->mtx
);
1686 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1687 ieee80211_run_deferred_scan(sdata
->local
);
1690 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1692 mutex_lock(&sdata
->local
->mtx
);
1693 __ieee80211_stop_poll(sdata
);
1694 mutex_unlock(&sdata
->local
->mtx
);
1697 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1698 u16 capab
, bool erp_valid
, u8 erp
)
1700 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1702 bool use_protection
;
1703 bool use_short_preamble
;
1704 bool use_short_slot
;
1707 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1708 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1710 use_protection
= false;
1711 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1714 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1715 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1716 use_short_slot
= true;
1718 if (use_protection
!= bss_conf
->use_cts_prot
) {
1719 bss_conf
->use_cts_prot
= use_protection
;
1720 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1723 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1724 bss_conf
->use_short_preamble
= use_short_preamble
;
1725 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1728 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1729 bss_conf
->use_short_slot
= use_short_slot
;
1730 changed
|= BSS_CHANGED_ERP_SLOT
;
1736 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1737 struct cfg80211_bss
*cbss
,
1738 u32 bss_info_changed
)
1740 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1741 struct ieee80211_local
*local
= sdata
->local
;
1742 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1744 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1745 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1746 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1748 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1749 beacon_loss_count
* bss_conf
->beacon_int
));
1751 sdata
->u
.mgd
.associated
= cbss
;
1752 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1754 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1756 if (sdata
->vif
.p2p
) {
1757 const struct cfg80211_bss_ies
*ies
;
1760 ies
= rcu_dereference(cbss
->ies
);
1764 ret
= cfg80211_get_p2p_attr(
1765 ies
->data
, ies
->len
,
1766 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1767 (u8
*) &bss_conf
->p2p_noa_attr
,
1768 sizeof(bss_conf
->p2p_noa_attr
));
1770 sdata
->u
.mgd
.p2p_noa_index
=
1771 bss_conf
->p2p_noa_attr
.index
;
1772 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1778 /* just to be sure */
1779 ieee80211_stop_poll(sdata
);
1781 ieee80211_led_assoc(local
, 1);
1783 if (sdata
->u
.mgd
.have_beacon
) {
1785 * If the AP is buggy we may get here with no DTIM period
1786 * known, so assume it's 1 which is the only safe assumption
1787 * in that case, although if the TIM IE is broken powersave
1788 * probably just won't work at all.
1790 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1791 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1792 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1794 bss_conf
->beacon_rate
= NULL
;
1795 bss_conf
->dtim_period
= 0;
1798 bss_conf
->assoc
= 1;
1800 /* Tell the driver to monitor connection quality (if supported) */
1801 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1802 bss_conf
->cqm_rssi_thold
)
1803 bss_info_changed
|= BSS_CHANGED_CQM
;
1805 /* Enable ARP filtering */
1806 if (bss_conf
->arp_addr_cnt
)
1807 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1809 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1811 mutex_lock(&local
->iflist_mtx
);
1812 ieee80211_recalc_ps(local
, -1);
1813 mutex_unlock(&local
->iflist_mtx
);
1815 ieee80211_recalc_smps(sdata
);
1816 ieee80211_recalc_ps_vif(sdata
);
1818 netif_carrier_on(sdata
->dev
);
1821 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1822 u16 stype
, u16 reason
, bool tx
,
1825 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1826 struct ieee80211_local
*local
= sdata
->local
;
1829 sdata_assert_lock(sdata
);
1831 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1834 if (WARN_ON(!ifmgd
->associated
))
1837 ieee80211_stop_poll(sdata
);
1839 ifmgd
->associated
= NULL
;
1840 netif_carrier_off(sdata
->dev
);
1843 * if we want to get out of ps before disassoc (why?) we have
1844 * to do it before sending disassoc, as otherwise the null-packet
1847 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1848 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1849 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1851 local
->ps_sdata
= NULL
;
1853 /* disable per-vif ps */
1854 ieee80211_recalc_ps_vif(sdata
);
1856 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1858 ieee80211_flush_queues(local
, sdata
);
1860 /* deauthenticate/disassociate now */
1861 if (tx
|| frame_buf
)
1862 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1863 reason
, tx
, frame_buf
);
1865 /* flush out frame */
1867 ieee80211_flush_queues(local
, sdata
);
1869 /* clear bssid only after building the needed mgmt frames */
1870 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1872 /* remove AP and TDLS peers */
1873 sta_info_flush(sdata
);
1875 /* finally reset all BSS / config parameters */
1876 changed
|= ieee80211_reset_erp_info(sdata
);
1878 ieee80211_led_assoc(local
, 0);
1879 changed
|= BSS_CHANGED_ASSOC
;
1880 sdata
->vif
.bss_conf
.assoc
= false;
1882 ifmgd
->p2p_noa_index
= -1;
1883 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
1884 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
1886 /* on the next assoc, re-program HT/VHT parameters */
1887 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1888 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1889 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
1890 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
1892 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1894 del_timer_sync(&local
->dynamic_ps_timer
);
1895 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1897 /* Disable ARP filtering */
1898 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1899 changed
|= BSS_CHANGED_ARP_FILTER
;
1901 sdata
->vif
.bss_conf
.qos
= false;
1902 changed
|= BSS_CHANGED_QOS
;
1904 /* The BSSID (not really interesting) and HT changed */
1905 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1906 ieee80211_bss_info_change_notify(sdata
, changed
);
1908 /* disassociated - set to defaults now */
1909 ieee80211_set_wmm_default(sdata
, false);
1911 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1912 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1913 del_timer_sync(&sdata
->u
.mgd
.timer
);
1914 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1916 sdata
->vif
.bss_conf
.dtim_period
= 0;
1917 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
1919 ifmgd
->have_beacon
= false;
1922 mutex_lock(&local
->mtx
);
1923 ieee80211_vif_release_channel(sdata
);
1925 sdata
->vif
.csa_active
= false;
1926 if (sdata
->csa_block_tx
) {
1927 ieee80211_wake_vif_queues(local
, sdata
,
1928 IEEE80211_QUEUE_STOP_REASON_CSA
);
1929 sdata
->csa_block_tx
= false;
1931 mutex_unlock(&local
->mtx
);
1933 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1936 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1937 struct ieee80211_hdr
*hdr
)
1940 * We can postpone the mgd.timer whenever receiving unicast frames
1941 * from AP because we know that the connection is working both ways
1942 * at that time. But multicast frames (and hence also beacons) must
1943 * be ignored here, because we need to trigger the timer during
1944 * data idle periods for sending the periodic probe request to the
1945 * AP we're connected to.
1947 if (is_multicast_ether_addr(hdr
->addr1
))
1950 ieee80211_sta_reset_conn_monitor(sdata
);
1953 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1955 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1956 struct ieee80211_local
*local
= sdata
->local
;
1958 mutex_lock(&local
->mtx
);
1959 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
1962 __ieee80211_stop_poll(sdata
);
1964 mutex_lock(&local
->iflist_mtx
);
1965 ieee80211_recalc_ps(local
, -1);
1966 mutex_unlock(&local
->iflist_mtx
);
1968 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1972 * We've received a probe response, but are not sure whether
1973 * we have or will be receiving any beacons or data, so let's
1974 * schedule the timers again, just in case.
1976 ieee80211_sta_reset_beacon_monitor(sdata
);
1978 mod_timer(&ifmgd
->conn_mon_timer
,
1979 round_jiffies_up(jiffies
+
1980 IEEE80211_CONNECTION_IDLE_TIME
));
1982 mutex_unlock(&local
->mtx
);
1985 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1986 struct ieee80211_hdr
*hdr
, bool ack
)
1988 if (!ieee80211_is_data(hdr
->frame_control
))
1991 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1992 sdata
->u
.mgd
.probe_send_count
> 0) {
1994 ieee80211_sta_reset_conn_monitor(sdata
);
1996 sdata
->u
.mgd
.nullfunc_failed
= true;
1997 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2002 ieee80211_sta_reset_conn_monitor(sdata
);
2005 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2007 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2009 u8
*dst
= ifmgd
->associated
->bssid
;
2010 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2013 * Try sending broadcast probe requests for the last three
2014 * probe requests after the first ones failed since some
2015 * buggy APs only support broadcast probe requests.
2017 if (ifmgd
->probe_send_count
>= unicast_limit
)
2021 * When the hardware reports an accurate Tx ACK status, it's
2022 * better to send a nullfunc frame instead of a probe request,
2023 * as it will kick us off the AP quickly if we aren't associated
2024 * anymore. The timeout will be reset if the frame is ACKed by
2027 ifmgd
->probe_send_count
++;
2029 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2030 ifmgd
->nullfunc_failed
= false;
2031 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
2036 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2037 if (WARN_ON_ONCE(ssid
== NULL
))
2042 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
2043 0, (u32
) -1, true, 0,
2044 ifmgd
->associated
->channel
, false);
2048 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2049 run_again(sdata
, ifmgd
->probe_timeout
);
2050 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2051 ieee80211_flush_queues(sdata
->local
, sdata
);
2054 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2057 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2058 bool already
= false;
2060 if (!ieee80211_sdata_running(sdata
))
2065 if (!ifmgd
->associated
)
2068 mutex_lock(&sdata
->local
->mtx
);
2070 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2071 mutex_unlock(&sdata
->local
->mtx
);
2076 mlme_dbg_ratelimited(sdata
,
2077 "detected beacon loss from AP (missed %d beacons) - probing\n",
2080 ieee80211_cqm_rssi_notify(&sdata
->vif
,
2081 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
,
2086 * The driver/our work has already reported this event or the
2087 * connection monitoring has kicked in and we have already sent
2088 * a probe request. Or maybe the AP died and the driver keeps
2089 * reporting until we disassociate...
2091 * In either case we have to ignore the current call to this
2092 * function (except for setting the correct probe reason bit)
2093 * because otherwise we would reset the timer every time and
2094 * never check whether we received a probe response!
2096 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
2099 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2101 mutex_unlock(&sdata
->local
->mtx
);
2106 mutex_lock(&sdata
->local
->iflist_mtx
);
2107 ieee80211_recalc_ps(sdata
->local
, -1);
2108 mutex_unlock(&sdata
->local
->iflist_mtx
);
2110 ifmgd
->probe_send_count
= 0;
2111 ieee80211_mgd_probe_ap_send(sdata
);
2113 sdata_unlock(sdata
);
2116 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2117 struct ieee80211_vif
*vif
)
2119 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2120 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2121 struct cfg80211_bss
*cbss
;
2122 struct sk_buff
*skb
;
2126 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2129 sdata_assert_lock(sdata
);
2131 if (ifmgd
->associated
)
2132 cbss
= ifmgd
->associated
;
2133 else if (ifmgd
->auth_data
)
2134 cbss
= ifmgd
->auth_data
->bss
;
2135 else if (ifmgd
->assoc_data
)
2136 cbss
= ifmgd
->assoc_data
->bss
;
2141 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2142 if (WARN_ON_ONCE(ssid
== NULL
))
2147 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
2148 (u32
) -1, cbss
->channel
,
2155 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2157 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2159 struct ieee80211_local
*local
= sdata
->local
;
2160 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2161 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2164 if (!ifmgd
->associated
) {
2165 sdata_unlock(sdata
);
2169 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2170 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2172 mutex_lock(&local
->mtx
);
2173 sdata
->vif
.csa_active
= false;
2174 if (sdata
->csa_block_tx
) {
2175 ieee80211_wake_vif_queues(local
, sdata
,
2176 IEEE80211_QUEUE_STOP_REASON_CSA
);
2177 sdata
->csa_block_tx
= false;
2179 mutex_unlock(&local
->mtx
);
2181 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
2182 IEEE80211_DEAUTH_FRAME_LEN
);
2183 sdata_unlock(sdata
);
2186 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2188 struct ieee80211_sub_if_data
*sdata
=
2189 container_of(work
, struct ieee80211_sub_if_data
,
2190 u
.mgd
.beacon_connection_loss_work
);
2191 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2192 struct sta_info
*sta
;
2194 if (ifmgd
->associated
) {
2196 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2198 sta
->beacon_loss_count
++;
2202 if (ifmgd
->connection_loss
) {
2203 sdata_info(sdata
, "Connection to AP %pM lost\n",
2205 __ieee80211_disconnect(sdata
);
2207 ieee80211_mgd_probe_ap(sdata
, true);
2211 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2213 struct ieee80211_sub_if_data
*sdata
=
2214 container_of(work
, struct ieee80211_sub_if_data
,
2215 u
.mgd
.csa_connection_drop_work
);
2217 __ieee80211_disconnect(sdata
);
2220 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2222 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2223 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2225 trace_api_beacon_loss(sdata
);
2227 sdata
->u
.mgd
.connection_loss
= false;
2228 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2230 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2232 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2234 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2235 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2237 trace_api_connection_loss(sdata
);
2239 sdata
->u
.mgd
.connection_loss
= true;
2240 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2242 EXPORT_SYMBOL(ieee80211_connection_loss
);
2245 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2248 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2250 sdata_assert_lock(sdata
);
2253 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2255 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2256 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2257 sdata
->u
.mgd
.flags
= 0;
2258 mutex_lock(&sdata
->local
->mtx
);
2259 ieee80211_vif_release_channel(sdata
);
2260 mutex_unlock(&sdata
->local
->mtx
);
2263 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2265 sdata
->u
.mgd
.auth_data
= NULL
;
2268 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2269 struct ieee80211_mgmt
*mgmt
, size_t len
)
2271 struct ieee80211_local
*local
= sdata
->local
;
2272 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2274 struct ieee802_11_elems elems
;
2277 pos
= mgmt
->u
.auth
.variable
;
2278 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2279 if (!elems
.challenge
)
2281 auth_data
->expected_transaction
= 4;
2282 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2283 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2284 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2285 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2286 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2287 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2288 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2289 auth_data
->key
, auth_data
->key_len
,
2290 auth_data
->key_idx
, tx_flags
);
2293 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2294 struct ieee80211_mgmt
*mgmt
, size_t len
)
2296 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2298 u16 auth_alg
, auth_transaction
, status_code
;
2299 struct sta_info
*sta
;
2301 sdata_assert_lock(sdata
);
2306 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2309 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2311 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2314 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2315 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2316 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2318 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2319 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2320 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2321 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2323 ifmgd
->auth_data
->expected_transaction
);
2327 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2328 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2329 mgmt
->sa
, status_code
);
2330 ieee80211_destroy_auth_data(sdata
, false);
2331 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2335 switch (ifmgd
->auth_data
->algorithm
) {
2336 case WLAN_AUTH_OPEN
:
2337 case WLAN_AUTH_LEAP
:
2341 case WLAN_AUTH_SHARED_KEY
:
2342 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2343 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2344 /* need another frame */
2349 WARN_ONCE(1, "invalid auth alg %d",
2350 ifmgd
->auth_data
->algorithm
);
2354 sdata_info(sdata
, "authenticated\n");
2355 ifmgd
->auth_data
->done
= true;
2356 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2357 ifmgd
->auth_data
->timeout_started
= true;
2358 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2360 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2361 ifmgd
->auth_data
->expected_transaction
!= 2) {
2363 * Report auth frame to user space for processing since another
2364 * round of Authentication frames is still needed.
2366 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2370 /* move station state to auth */
2371 mutex_lock(&sdata
->local
->sta_mtx
);
2372 sta
= sta_info_get(sdata
, bssid
);
2374 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2377 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2378 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2381 mutex_unlock(&sdata
->local
->sta_mtx
);
2383 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2386 mutex_unlock(&sdata
->local
->sta_mtx
);
2387 /* ignore frame -- wait for timeout */
2390 #define case_WLAN(type) \
2391 case WLAN_REASON_##type: return #type
2393 static const char *ieee80211_get_reason_code_string(u16 reason_code
)
2395 switch (reason_code
) {
2396 case_WLAN(UNSPECIFIED
);
2397 case_WLAN(PREV_AUTH_NOT_VALID
);
2398 case_WLAN(DEAUTH_LEAVING
);
2399 case_WLAN(DISASSOC_DUE_TO_INACTIVITY
);
2400 case_WLAN(DISASSOC_AP_BUSY
);
2401 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA
);
2402 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA
);
2403 case_WLAN(DISASSOC_STA_HAS_LEFT
);
2404 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH
);
2405 case_WLAN(DISASSOC_BAD_POWER
);
2406 case_WLAN(DISASSOC_BAD_SUPP_CHAN
);
2407 case_WLAN(INVALID_IE
);
2408 case_WLAN(MIC_FAILURE
);
2409 case_WLAN(4WAY_HANDSHAKE_TIMEOUT
);
2410 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT
);
2411 case_WLAN(IE_DIFFERENT
);
2412 case_WLAN(INVALID_GROUP_CIPHER
);
2413 case_WLAN(INVALID_PAIRWISE_CIPHER
);
2414 case_WLAN(INVALID_AKMP
);
2415 case_WLAN(UNSUPP_RSN_VERSION
);
2416 case_WLAN(INVALID_RSN_IE_CAP
);
2417 case_WLAN(IEEE8021X_FAILED
);
2418 case_WLAN(CIPHER_SUITE_REJECTED
);
2419 case_WLAN(DISASSOC_UNSPECIFIED_QOS
);
2420 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH
);
2421 case_WLAN(DISASSOC_LOW_ACK
);
2422 case_WLAN(DISASSOC_QAP_EXCEED_TXOP
);
2423 case_WLAN(QSTA_LEAVE_QBSS
);
2424 case_WLAN(QSTA_NOT_USE
);
2425 case_WLAN(QSTA_REQUIRE_SETUP
);
2426 case_WLAN(QSTA_TIMEOUT
);
2427 case_WLAN(QSTA_CIPHER_NOT_SUPP
);
2428 case_WLAN(MESH_PEER_CANCELED
);
2429 case_WLAN(MESH_MAX_PEERS
);
2430 case_WLAN(MESH_CONFIG
);
2431 case_WLAN(MESH_CLOSE
);
2432 case_WLAN(MESH_MAX_RETRIES
);
2433 case_WLAN(MESH_CONFIRM_TIMEOUT
);
2434 case_WLAN(MESH_INVALID_GTK
);
2435 case_WLAN(MESH_INCONSISTENT_PARAM
);
2436 case_WLAN(MESH_INVALID_SECURITY
);
2437 case_WLAN(MESH_PATH_ERROR
);
2438 case_WLAN(MESH_PATH_NOFORWARD
);
2439 case_WLAN(MESH_PATH_DEST_UNREACHABLE
);
2440 case_WLAN(MAC_EXISTS_IN_MBSS
);
2441 case_WLAN(MESH_CHAN_REGULATORY
);
2442 case_WLAN(MESH_CHAN
);
2443 default: return "<unknown>";
2447 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2448 struct ieee80211_mgmt
*mgmt
, size_t len
)
2450 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2451 const u8
*bssid
= NULL
;
2454 sdata_assert_lock(sdata
);
2459 if (!ifmgd
->associated
||
2460 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2463 bssid
= ifmgd
->associated
->bssid
;
2465 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2467 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u=%s)\n",
2468 bssid
, reason_code
, ieee80211_get_reason_code_string(reason_code
));
2470 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2472 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2476 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2477 struct ieee80211_mgmt
*mgmt
, size_t len
)
2479 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2482 sdata_assert_lock(sdata
);
2487 if (!ifmgd
->associated
||
2488 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2491 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2493 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2494 mgmt
->sa
, reason_code
);
2496 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2498 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2501 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2502 u8
*supp_rates
, unsigned int supp_rates_len
,
2503 u32
*rates
, u32
*basic_rates
,
2504 bool *have_higher_than_11mbit
,
2505 int *min_rate
, int *min_rate_index
,
2506 int shift
, u32 rate_flags
)
2510 for (i
= 0; i
< supp_rates_len
; i
++) {
2511 int rate
= supp_rates
[i
] & 0x7f;
2512 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2514 if ((rate
* 5 * (1 << shift
)) > 110)
2515 *have_higher_than_11mbit
= true;
2518 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2519 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2521 * Note: Even through the membership selector and the basic
2522 * rate flag share the same bit, they are not exactly
2525 if (!!(supp_rates
[i
] & 0x80) &&
2526 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2529 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2530 struct ieee80211_rate
*br
;
2533 br
= &sband
->bitrates
[j
];
2534 if ((rate_flags
& br
->flags
) != rate_flags
)
2537 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2538 if (brate
== rate
) {
2541 *basic_rates
|= BIT(j
);
2542 if ((rate
* 5) < *min_rate
) {
2543 *min_rate
= rate
* 5;
2544 *min_rate_index
= j
;
2552 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2555 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2557 sdata_assert_lock(sdata
);
2560 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2562 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2563 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2564 sdata
->u
.mgd
.flags
= 0;
2565 mutex_lock(&sdata
->local
->mtx
);
2566 ieee80211_vif_release_channel(sdata
);
2567 mutex_unlock(&sdata
->local
->mtx
);
2571 sdata
->u
.mgd
.assoc_data
= NULL
;
2574 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2575 struct cfg80211_bss
*cbss
,
2576 struct ieee80211_mgmt
*mgmt
, size_t len
)
2578 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2579 struct ieee80211_local
*local
= sdata
->local
;
2580 struct ieee80211_supported_band
*sband
;
2581 struct sta_info
*sta
;
2583 u16 capab_info
, aid
;
2584 struct ieee802_11_elems elems
;
2585 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2586 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2587 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2592 /* AssocResp and ReassocResp have identical structure */
2594 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2595 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2597 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2598 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2600 aid
&= ~(BIT(15) | BIT(14));
2602 ifmgd
->broken_ap
= false;
2604 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2605 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2608 ifmgd
->broken_ap
= true;
2611 pos
= mgmt
->u
.assoc_resp
.variable
;
2612 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2614 if (!elems
.supp_rates
) {
2615 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2622 * Some APs are erroneously not including some information in their
2623 * (re)association response frames. Try to recover by using the data
2624 * from the beacon or probe response. This seems to afflict mobile
2625 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2626 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2628 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2629 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2630 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2631 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2632 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2633 const struct cfg80211_bss_ies
*ies
;
2634 struct ieee802_11_elems bss_elems
;
2637 ies
= rcu_dereference(cbss
->ies
);
2639 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2645 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2647 if (assoc_data
->wmm
&&
2648 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2649 elems
.wmm_param
= bss_elems
.wmm_param
;
2651 "AP bug: WMM param missing from AssocResp\n");
2655 * Also check if we requested HT/VHT, otherwise the AP doesn't
2656 * have to include the IEs in the (re)association response.
2658 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2659 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2660 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2662 "AP bug: HT capability missing from AssocResp\n");
2664 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2665 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2666 elems
.ht_operation
= bss_elems
.ht_operation
;
2668 "AP bug: HT operation missing from AssocResp\n");
2670 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2671 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2672 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2674 "AP bug: VHT capa missing from AssocResp\n");
2676 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2677 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2678 elems
.vht_operation
= bss_elems
.vht_operation
;
2680 "AP bug: VHT operation missing from AssocResp\n");
2685 * We previously checked these in the beacon/probe response, so
2686 * they should be present here. This is just a safety net.
2688 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2689 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2691 "HT AP is missing WMM params or HT capability/operation\n");
2696 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2697 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2699 "VHT AP is missing VHT capability/operation\n");
2704 mutex_lock(&sdata
->local
->sta_mtx
);
2706 * station info was already allocated and inserted before
2707 * the association and should be available to us
2709 sta
= sta_info_get(sdata
, cbss
->bssid
);
2710 if (WARN_ON(!sta
)) {
2711 mutex_unlock(&sdata
->local
->sta_mtx
);
2716 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2718 /* Set up internal HT/VHT capabilities */
2719 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2720 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2721 elems
.ht_cap_elem
, sta
);
2723 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2724 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2725 elems
.vht_cap_elem
, sta
);
2728 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2729 * in their association response, so ignore that data for our own
2730 * configuration. If it changed since the last beacon, we'll get the
2731 * next beacon and update then.
2735 * If an operating mode notification IE is present, override the
2736 * NSS calculation (that would be done in rate_control_rate_init())
2737 * and use the # of streams from that element.
2739 if (elems
.opmode_notif
&&
2740 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2743 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2744 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2746 sta
->sta
.rx_nss
= nss
;
2749 rate_control_rate_init(sta
);
2751 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2752 set_sta_flag(sta
, WLAN_STA_MFP
);
2754 sta
->sta
.wme
= elems
.wmm_param
;
2756 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2757 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2758 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2761 "failed to move station %pM to desired state\n",
2763 WARN_ON(__sta_info_destroy(sta
));
2764 mutex_unlock(&sdata
->local
->sta_mtx
);
2769 mutex_unlock(&sdata
->local
->sta_mtx
);
2772 * Always handle WMM once after association regardless
2773 * of the first value the AP uses. Setting -1 here has
2774 * that effect because the AP values is an unsigned
2777 ifmgd
->wmm_last_param_set
= -1;
2779 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) && elems
.wmm_param
)
2780 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2781 elems
.wmm_param_len
);
2783 ieee80211_set_wmm_default(sdata
, false);
2784 changed
|= BSS_CHANGED_QOS
;
2786 /* set AID and assoc capability,
2787 * ieee80211_set_associated() will tell the driver */
2788 bss_conf
->aid
= aid
;
2789 bss_conf
->assoc_capability
= capab_info
;
2790 ieee80211_set_associated(sdata
, cbss
, changed
);
2793 * If we're using 4-addr mode, let the AP know that we're
2794 * doing so, so that it can create the STA VLAN on its side
2796 if (ifmgd
->use_4addr
)
2797 ieee80211_send_4addr_nullfunc(local
, sdata
);
2800 * Start timer to probe the connection to the AP now.
2801 * Also start the timer that will detect beacon loss.
2803 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2804 ieee80211_sta_reset_beacon_monitor(sdata
);
2812 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2813 struct ieee80211_mgmt
*mgmt
,
2816 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2817 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2818 u16 capab_info
, status_code
, aid
;
2819 struct ieee802_11_elems elems
;
2820 int ac
, uapsd_queues
= -1;
2823 struct cfg80211_bss
*bss
;
2825 sdata_assert_lock(sdata
);
2829 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2833 * AssocResp and ReassocResp have identical structure, so process both
2834 * of them in this function.
2840 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2841 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2842 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2843 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2846 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2847 reassoc
? "Rea" : "A", mgmt
->sa
,
2848 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2850 pos
= mgmt
->u
.assoc_resp
.variable
;
2851 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2853 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2854 elems
.timeout_int
&&
2855 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2857 tu
= le32_to_cpu(elems
.timeout_int
->value
);
2858 ms
= tu
* 1024 / 1000;
2860 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2862 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2863 assoc_data
->timeout_started
= true;
2864 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2865 run_again(sdata
, assoc_data
->timeout
);
2869 bss
= assoc_data
->bss
;
2871 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2872 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2873 mgmt
->sa
, status_code
);
2874 ieee80211_destroy_assoc_data(sdata
, false);
2876 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
2877 /* oops -- internal error -- send timeout for now */
2878 ieee80211_destroy_assoc_data(sdata
, false);
2879 cfg80211_assoc_timeout(sdata
->dev
, bss
);
2882 sdata_info(sdata
, "associated\n");
2885 * destroy assoc_data afterwards, as otherwise an idle
2886 * recalc after assoc_data is NULL but before associated
2887 * is set can cause the interface to go idle
2889 ieee80211_destroy_assoc_data(sdata
, true);
2891 /* get uapsd queues configuration */
2893 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
2894 if (sdata
->tx_conf
[ac
].uapsd
)
2895 uapsd_queues
|= BIT(ac
);
2898 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
, uapsd_queues
);
2901 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2902 struct ieee80211_mgmt
*mgmt
, size_t len
,
2903 struct ieee80211_rx_status
*rx_status
,
2904 struct ieee802_11_elems
*elems
)
2906 struct ieee80211_local
*local
= sdata
->local
;
2907 struct ieee80211_bss
*bss
;
2908 struct ieee80211_channel
*channel
;
2910 sdata_assert_lock(sdata
);
2912 channel
= ieee80211_get_channel(local
->hw
.wiphy
, rx_status
->freq
);
2916 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2919 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
2920 ieee80211_rx_bss_put(local
, bss
);
2925 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2926 struct sk_buff
*skb
)
2928 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2929 struct ieee80211_if_managed
*ifmgd
;
2930 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2931 size_t baselen
, len
= skb
->len
;
2932 struct ieee802_11_elems elems
;
2934 ifmgd
= &sdata
->u
.mgd
;
2936 sdata_assert_lock(sdata
);
2938 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2939 return; /* ignore ProbeResp to foreign address */
2941 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2945 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2948 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2950 if (ifmgd
->associated
&&
2951 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2952 ieee80211_reset_ap_probe(sdata
);
2954 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2955 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2956 /* got probe response, continue with auth */
2957 sdata_info(sdata
, "direct probe responded\n");
2958 ifmgd
->auth_data
->tries
= 0;
2959 ifmgd
->auth_data
->timeout
= jiffies
;
2960 ifmgd
->auth_data
->timeout_started
= true;
2961 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2966 * This is the canonical list of information elements we care about,
2967 * the filter code also gives us all changes to the Microsoft OUI
2968 * (00:50:F2) vendor IE which is used for WMM which we need to track,
2969 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
2970 * changes to requested client power.
2972 * We implement beacon filtering in software since that means we can
2973 * avoid processing the frame here and in cfg80211, and userspace
2974 * will not be able to tell whether the hardware supports it or not.
2976 * XXX: This list needs to be dynamic -- userspace needs to be able to
2977 * add items it requires. It also needs to be able to tell us to
2978 * look out for other vendor IEs.
2980 static const u64 care_about_ies
=
2981 (1ULL << WLAN_EID_COUNTRY
) |
2982 (1ULL << WLAN_EID_ERP_INFO
) |
2983 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2984 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2985 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2986 (1ULL << WLAN_EID_HT_OPERATION
);
2988 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2989 struct ieee80211_mgmt
*mgmt
, size_t len
,
2990 struct ieee80211_rx_status
*rx_status
)
2992 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2993 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2995 struct ieee802_11_elems elems
;
2996 struct ieee80211_local
*local
= sdata
->local
;
2997 struct ieee80211_chanctx_conf
*chanctx_conf
;
2998 struct ieee80211_channel
*chan
;
2999 struct sta_info
*sta
;
3005 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3007 sdata_assert_lock(sdata
);
3009 /* Process beacon from the current BSS */
3010 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
3015 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3016 if (!chanctx_conf
) {
3021 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
3025 chan
= chanctx_conf
->def
.chan
;
3028 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
3029 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
3030 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
3031 len
- baselen
, false, &elems
);
3033 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3034 if (elems
.tim
&& !elems
.parse_error
) {
3035 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
3036 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
3038 ifmgd
->have_beacon
= true;
3039 ifmgd
->assoc_data
->need_beacon
= false;
3040 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3041 sdata
->vif
.bss_conf
.sync_tsf
=
3042 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3043 sdata
->vif
.bss_conf
.sync_device_ts
=
3044 rx_status
->device_timestamp
;
3046 sdata
->vif
.bss_conf
.sync_dtim_count
=
3047 elems
.tim
->dtim_count
;
3049 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3051 /* continue assoc process */
3052 ifmgd
->assoc_data
->timeout
= jiffies
;
3053 ifmgd
->assoc_data
->timeout_started
= true;
3054 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3058 if (!ifmgd
->associated
||
3059 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3061 bssid
= ifmgd
->associated
->bssid
;
3063 /* Track average RSSI from the Beacon frames of the current AP */
3064 ifmgd
->last_beacon_signal
= rx_status
->signal
;
3065 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3066 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3067 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
3068 ifmgd
->last_cqm_event_signal
= 0;
3069 ifmgd
->count_beacon_signal
= 1;
3070 ifmgd
->last_ave_beacon_signal
= 0;
3072 ifmgd
->ave_beacon_signal
=
3073 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
3074 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
3075 ifmgd
->ave_beacon_signal
) / 16;
3076 ifmgd
->count_beacon_signal
++;
3079 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3080 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3081 int sig
= ifmgd
->ave_beacon_signal
;
3082 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3085 * if signal crosses either of the boundaries, invoke callback
3086 * with appropriate parameters
3088 if (sig
> ifmgd
->rssi_max_thold
&&
3089 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3090 ifmgd
->last_ave_beacon_signal
= sig
;
3091 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
3092 } else if (sig
< ifmgd
->rssi_min_thold
&&
3093 (last_sig
>= ifmgd
->rssi_max_thold
||
3095 ifmgd
->last_ave_beacon_signal
= sig
;
3096 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
3100 if (bss_conf
->cqm_rssi_thold
&&
3101 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3102 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3103 int sig
= ifmgd
->ave_beacon_signal
/ 16;
3104 int last_event
= ifmgd
->last_cqm_event_signal
;
3105 int thold
= bss_conf
->cqm_rssi_thold
;
3106 int hyst
= bss_conf
->cqm_rssi_hyst
;
3108 (last_event
== 0 || sig
< last_event
- hyst
)) {
3109 ifmgd
->last_cqm_event_signal
= sig
;
3110 ieee80211_cqm_rssi_notify(
3112 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3114 } else if (sig
> thold
&&
3115 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3116 ifmgd
->last_cqm_event_signal
= sig
;
3117 ieee80211_cqm_rssi_notify(
3119 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3124 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
3125 mlme_dbg_ratelimited(sdata
,
3126 "cancelling AP probe due to a received beacon\n");
3127 ieee80211_reset_ap_probe(sdata
);
3131 * Push the beacon loss detection into the future since
3132 * we are processing a beacon from the AP just now.
3134 ieee80211_sta_reset_beacon_monitor(sdata
);
3136 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3137 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3138 len
- baselen
, false, &elems
,
3139 care_about_ies
, ncrc
);
3141 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
3142 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
3146 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3147 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3148 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3149 ieee80211_hw_config(local
,
3150 IEEE80211_CONF_CHANGE_PS
);
3152 ieee80211_send_nullfunc(local
, sdata
, 0);
3153 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3154 local
->pspolling
= true;
3157 * Here is assumed that the driver will be
3158 * able to send ps-poll frame and receive a
3159 * response even though power save mode is
3160 * enabled, but some drivers might require
3161 * to disable power save here. This needs
3162 * to be investigated.
3164 ieee80211_send_pspoll(local
, sdata
);
3169 if (sdata
->vif
.p2p
) {
3170 struct ieee80211_p2p_noa_attr noa
= {};
3173 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3175 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3176 (u8
*) &noa
, sizeof(noa
));
3178 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3179 /* valid noa_attr and index changed */
3180 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3181 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3182 changed
|= BSS_CHANGED_P2P_PS
;
3184 * make sure we update all information, the CRC
3185 * mechanism doesn't look at P2P attributes.
3187 ifmgd
->beacon_crc_valid
= false;
3189 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3190 /* noa_attr not found and we had valid noa_attr before */
3191 sdata
->u
.mgd
.p2p_noa_index
= -1;
3192 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3193 changed
|= BSS_CHANGED_P2P_PS
;
3194 ifmgd
->beacon_crc_valid
= false;
3198 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3200 ifmgd
->beacon_crc
= ncrc
;
3201 ifmgd
->beacon_crc_valid
= true;
3203 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3205 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
3208 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
3209 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3210 elems
.wmm_param_len
))
3211 changed
|= BSS_CHANGED_QOS
;
3214 * If we haven't had a beacon before, tell the driver about the
3215 * DTIM period (and beacon timing if desired) now.
3217 if (!ifmgd
->have_beacon
) {
3218 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3220 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3222 bss_conf
->dtim_period
= 1;
3224 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3225 sdata
->vif
.bss_conf
.sync_tsf
=
3226 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3227 sdata
->vif
.bss_conf
.sync_device_ts
=
3228 rx_status
->device_timestamp
;
3230 sdata
->vif
.bss_conf
.sync_dtim_count
=
3231 elems
.tim
->dtim_count
;
3233 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3236 changed
|= BSS_CHANGED_BEACON_INFO
;
3237 ifmgd
->have_beacon
= true;
3239 mutex_lock(&local
->iflist_mtx
);
3240 ieee80211_recalc_ps(local
, -1);
3241 mutex_unlock(&local
->iflist_mtx
);
3243 ieee80211_recalc_ps_vif(sdata
);
3246 if (elems
.erp_info
) {
3248 erp_value
= elems
.erp_info
[0];
3252 changed
|= ieee80211_handle_bss_capability(sdata
,
3253 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3254 erp_valid
, erp_value
);
3256 mutex_lock(&local
->sta_mtx
);
3257 sta
= sta_info_get(sdata
, bssid
);
3259 if (ieee80211_config_bw(sdata
, sta
,
3260 elems
.ht_cap_elem
, elems
.ht_operation
,
3261 elems
.vht_operation
, bssid
, &changed
)) {
3262 mutex_unlock(&local
->sta_mtx
);
3263 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3264 WLAN_REASON_DEAUTH_LEAVING
,
3266 cfg80211_tx_mlme_mgmt(sdata
->dev
, deauth_buf
,
3267 sizeof(deauth_buf
));
3271 if (sta
&& elems
.opmode_notif
)
3272 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3273 rx_status
->band
, true);
3274 mutex_unlock(&local
->sta_mtx
);
3276 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
, mgmt
,
3278 elems
.country_elem_len
,
3279 elems
.pwr_constr_elem
,
3280 elems
.cisco_dtpc_elem
);
3282 ieee80211_bss_info_change_notify(sdata
, changed
);
3285 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3286 struct sk_buff
*skb
)
3288 struct ieee80211_rx_status
*rx_status
;
3289 struct ieee80211_mgmt
*mgmt
;
3291 struct ieee802_11_elems elems
;
3294 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3295 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3296 fc
= le16_to_cpu(mgmt
->frame_control
);
3300 switch (fc
& IEEE80211_FCTL_STYPE
) {
3301 case IEEE80211_STYPE_BEACON
:
3302 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3304 case IEEE80211_STYPE_PROBE_RESP
:
3305 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3307 case IEEE80211_STYPE_AUTH
:
3308 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3310 case IEEE80211_STYPE_DEAUTH
:
3311 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3313 case IEEE80211_STYPE_DISASSOC
:
3314 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3316 case IEEE80211_STYPE_ASSOC_RESP
:
3317 case IEEE80211_STYPE_REASSOC_RESP
:
3318 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3320 case IEEE80211_STYPE_ACTION
:
3321 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3322 ies_len
= skb
->len
-
3323 offsetof(struct ieee80211_mgmt
,
3324 u
.action
.u
.chan_switch
.variable
);
3329 ieee802_11_parse_elems(
3330 mgmt
->u
.action
.u
.chan_switch
.variable
,
3331 ies_len
, true, &elems
);
3333 if (elems
.parse_error
)
3336 ieee80211_sta_process_chanswitch(sdata
,
3339 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3340 ies_len
= skb
->len
-
3341 offsetof(struct ieee80211_mgmt
,
3342 u
.action
.u
.ext_chan_switch
.variable
);
3347 ieee802_11_parse_elems(
3348 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3349 ies_len
, true, &elems
);
3351 if (elems
.parse_error
)
3354 /* for the handling code pretend this was also an IE */
3355 elems
.ext_chansw_ie
=
3356 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3358 ieee80211_sta_process_chanswitch(sdata
,
3364 sdata_unlock(sdata
);
3367 static void ieee80211_sta_timer(unsigned long data
)
3369 struct ieee80211_sub_if_data
*sdata
=
3370 (struct ieee80211_sub_if_data
*) data
;
3372 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3375 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3376 u8
*bssid
, u8 reason
, bool tx
)
3378 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3380 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3383 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3384 IEEE80211_DEAUTH_FRAME_LEN
);
3387 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3389 struct ieee80211_local
*local
= sdata
->local
;
3390 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3391 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3394 sdata_assert_lock(sdata
);
3396 if (WARN_ON_ONCE(!auth_data
))
3401 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3402 sdata_info(sdata
, "authentication with %pM timed out\n",
3403 auth_data
->bss
->bssid
);
3406 * Most likely AP is not in the range so remove the
3407 * bss struct for that AP.
3409 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3414 drv_mgd_prepare_tx(local
, sdata
);
3416 if (auth_data
->bss
->proberesp_ies
) {
3420 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3421 auth_data
->bss
->bssid
, auth_data
->tries
,
3422 IEEE80211_AUTH_MAX_TRIES
);
3424 auth_data
->expected_transaction
= 2;
3426 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3427 trans
= auth_data
->sae_trans
;
3428 status
= auth_data
->sae_status
;
3429 auth_data
->expected_transaction
= trans
;
3432 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3433 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3434 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3436 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3437 auth_data
->data
, auth_data
->data_len
,
3438 auth_data
->bss
->bssid
,
3439 auth_data
->bss
->bssid
, NULL
, 0, 0,
3444 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3445 auth_data
->bss
->bssid
, auth_data
->tries
,
3446 IEEE80211_AUTH_MAX_TRIES
);
3449 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3455 * Direct probe is sent to broadcast address as some APs
3456 * will not answer to direct packet in unassociated state.
3458 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
3459 NULL
, 0, (u32
) -1, true, 0,
3460 auth_data
->bss
->channel
, false);
3464 if (tx_flags
== 0) {
3465 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3466 auth_data
->timeout_started
= true;
3467 run_again(sdata
, auth_data
->timeout
);
3469 auth_data
->timeout
=
3470 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3471 auth_data
->timeout_started
= true;
3472 run_again(sdata
, auth_data
->timeout
);
3478 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3480 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3481 struct ieee80211_local
*local
= sdata
->local
;
3483 sdata_assert_lock(sdata
);
3485 assoc_data
->tries
++;
3486 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3487 sdata_info(sdata
, "association with %pM timed out\n",
3488 assoc_data
->bss
->bssid
);
3491 * Most likely AP is not in the range so remove the
3492 * bss struct for that AP.
3494 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3499 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3500 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3501 IEEE80211_ASSOC_MAX_TRIES
);
3502 ieee80211_send_assoc(sdata
);
3504 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3505 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3506 assoc_data
->timeout_started
= true;
3507 run_again(sdata
, assoc_data
->timeout
);
3509 assoc_data
->timeout
=
3510 round_jiffies_up(jiffies
+
3511 IEEE80211_ASSOC_TIMEOUT_LONG
);
3512 assoc_data
->timeout_started
= true;
3513 run_again(sdata
, assoc_data
->timeout
);
3519 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3520 __le16 fc
, bool acked
)
3522 struct ieee80211_local
*local
= sdata
->local
;
3524 sdata
->u
.mgd
.status_fc
= fc
;
3525 sdata
->u
.mgd
.status_acked
= acked
;
3526 sdata
->u
.mgd
.status_received
= true;
3528 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3531 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3533 struct ieee80211_local
*local
= sdata
->local
;
3534 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3538 if (ifmgd
->status_received
) {
3539 __le16 fc
= ifmgd
->status_fc
;
3540 bool status_acked
= ifmgd
->status_acked
;
3542 ifmgd
->status_received
= false;
3543 if (ifmgd
->auth_data
&&
3544 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3546 ifmgd
->auth_data
->timeout
=
3547 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3548 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3550 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3552 ifmgd
->auth_data
->timeout_started
= true;
3553 } else if (ifmgd
->assoc_data
&&
3554 (ieee80211_is_assoc_req(fc
) ||
3555 ieee80211_is_reassoc_req(fc
))) {
3557 ifmgd
->assoc_data
->timeout
=
3558 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3559 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3561 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3563 ifmgd
->assoc_data
->timeout_started
= true;
3567 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3568 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3569 if (ifmgd
->auth_data
->done
) {
3571 * ok ... we waited for assoc but userspace didn't,
3572 * so let's just kill the auth data
3574 ieee80211_destroy_auth_data(sdata
, false);
3575 } else if (ieee80211_probe_auth(sdata
)) {
3578 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3580 ieee80211_destroy_auth_data(sdata
, false);
3582 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3584 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3585 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3587 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3588 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3589 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3590 ieee80211_do_assoc(sdata
)) {
3591 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3593 ieee80211_destroy_assoc_data(sdata
, false);
3594 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3596 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3597 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3599 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3600 ifmgd
->associated
) {
3604 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3606 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3607 max_tries
= max_nullfunc_tries
;
3609 max_tries
= max_probe_tries
;
3611 /* ACK received for nullfunc probing frame */
3612 if (!ifmgd
->probe_send_count
)
3613 ieee80211_reset_ap_probe(sdata
);
3614 else if (ifmgd
->nullfunc_failed
) {
3615 if (ifmgd
->probe_send_count
< max_tries
) {
3617 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3618 bssid
, ifmgd
->probe_send_count
,
3620 ieee80211_mgd_probe_ap_send(sdata
);
3623 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3625 ieee80211_sta_connection_lost(sdata
, bssid
,
3626 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3629 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3630 run_again(sdata
, ifmgd
->probe_timeout
);
3631 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3633 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3634 bssid
, probe_wait_ms
);
3635 ieee80211_sta_connection_lost(sdata
, bssid
,
3636 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3637 } else if (ifmgd
->probe_send_count
< max_tries
) {
3639 "No probe response from AP %pM after %dms, try %d/%i\n",
3640 bssid
, probe_wait_ms
,
3641 ifmgd
->probe_send_count
, max_tries
);
3642 ieee80211_mgd_probe_ap_send(sdata
);
3645 * We actually lost the connection ... or did we?
3648 wiphy_debug(local
->hw
.wiphy
,
3649 "%s: No probe response from AP %pM"
3650 " after %dms, disconnecting.\n",
3652 bssid
, probe_wait_ms
);
3654 ieee80211_sta_connection_lost(sdata
, bssid
,
3655 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3659 sdata_unlock(sdata
);
3662 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3664 struct ieee80211_sub_if_data
*sdata
=
3665 (struct ieee80211_sub_if_data
*) data
;
3666 struct ieee80211_local
*local
= sdata
->local
;
3668 if (local
->quiescing
)
3671 if (sdata
->vif
.csa_active
)
3674 sdata
->u
.mgd
.connection_loss
= false;
3675 ieee80211_queue_work(&sdata
->local
->hw
,
3676 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3679 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3681 struct ieee80211_sub_if_data
*sdata
=
3682 (struct ieee80211_sub_if_data
*) data
;
3683 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3684 struct ieee80211_local
*local
= sdata
->local
;
3686 if (local
->quiescing
)
3689 if (sdata
->vif
.csa_active
)
3692 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3695 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3697 struct ieee80211_sub_if_data
*sdata
=
3698 container_of(work
, struct ieee80211_sub_if_data
,
3699 u
.mgd
.monitor_work
);
3701 ieee80211_mgd_probe_ap(sdata
, false);
3704 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3708 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3709 __ieee80211_stop_poll(sdata
);
3711 /* let's probe the connection once */
3712 flags
= sdata
->local
->hw
.flags
;
3713 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3714 ieee80211_queue_work(&sdata
->local
->hw
,
3715 &sdata
->u
.mgd
.monitor_work
);
3716 /* and do all the other regular work too */
3717 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3722 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data
*sdata
)
3724 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3725 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3729 if (ifmgd
->auth_data
|| ifmgd
->assoc_data
) {
3730 const u8
*bssid
= ifmgd
->auth_data
?
3731 ifmgd
->auth_data
->bss
->bssid
:
3732 ifmgd
->assoc_data
->bss
->bssid
;
3735 * If we are trying to authenticate / associate while suspending,
3736 * cfg80211 won't know and won't actually abort those attempts,
3737 * thus we need to do that ourselves.
3739 ieee80211_send_deauth_disassoc(sdata
, bssid
,
3740 IEEE80211_STYPE_DEAUTH
,
3741 WLAN_REASON_DEAUTH_LEAVING
,
3743 if (ifmgd
->assoc_data
)
3744 ieee80211_destroy_assoc_data(sdata
, false);
3745 if (ifmgd
->auth_data
)
3746 ieee80211_destroy_auth_data(sdata
, false);
3747 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3748 IEEE80211_DEAUTH_FRAME_LEN
);
3751 sdata_unlock(sdata
);
3754 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3756 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3759 if (!ifmgd
->associated
) {
3760 sdata_unlock(sdata
);
3764 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3765 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3766 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3767 ieee80211_sta_connection_lost(sdata
,
3768 ifmgd
->associated
->bssid
,
3769 WLAN_REASON_UNSPECIFIED
,
3771 sdata_unlock(sdata
);
3774 sdata_unlock(sdata
);
3778 /* interface setup */
3779 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3781 struct ieee80211_if_managed
*ifmgd
;
3783 ifmgd
= &sdata
->u
.mgd
;
3784 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3785 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3786 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3787 ieee80211_beacon_connection_loss_work
);
3788 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3789 ieee80211_csa_connection_drop_work
);
3790 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
3791 INIT_DELAYED_WORK(&ifmgd
->tdls_peer_del_work
,
3792 ieee80211_tdls_peer_del_work
);
3793 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3794 (unsigned long) sdata
);
3795 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3796 (unsigned long) sdata
);
3797 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3798 (unsigned long) sdata
);
3799 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3800 (unsigned long) sdata
);
3803 ifmgd
->powersave
= sdata
->wdev
.ps
;
3804 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
3805 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
3806 ifmgd
->p2p_noa_index
= -1;
3808 if (sdata
->local
->hw
.wiphy
->features
& NL80211_FEATURE_DYNAMIC_SMPS
)
3809 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3811 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3814 /* scan finished notification */
3815 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3817 struct ieee80211_sub_if_data
*sdata
;
3819 /* Restart STA timers */
3821 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3822 if (ieee80211_sdata_running(sdata
))
3823 ieee80211_restart_sta_timer(sdata
);
3828 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3829 unsigned long data
, void *dummy
)
3831 s32 latency_usec
= (s32
) data
;
3832 struct ieee80211_local
*local
=
3833 container_of(nb
, struct ieee80211_local
,
3834 network_latency_notifier
);
3836 mutex_lock(&local
->iflist_mtx
);
3837 ieee80211_recalc_ps(local
, latency_usec
);
3838 mutex_unlock(&local
->iflist_mtx
);
3843 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3844 struct cfg80211_bss
*cbss
)
3846 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3847 const u8
*ht_cap_ie
, *vht_cap_ie
;
3848 const struct ieee80211_ht_cap
*ht_cap
;
3849 const struct ieee80211_vht_cap
*vht_cap
;
3852 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3855 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3856 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3857 ht_cap
= (void *)(ht_cap_ie
+ 2);
3858 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3860 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3861 * "Tx Unequal Modulation Supported" fields.
3865 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3868 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3869 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3873 vht_cap
= (void *)(vht_cap_ie
+ 2);
3874 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3875 for (nss
= 8; nss
> 0; nss
--) {
3876 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3877 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3880 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3881 chains
= max(chains
, nss
);
3887 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3888 struct cfg80211_bss
*cbss
)
3890 struct ieee80211_local
*local
= sdata
->local
;
3891 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3892 const struct ieee80211_ht_cap
*ht_cap
= NULL
;
3893 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3894 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3895 struct ieee80211_supported_band
*sband
;
3896 struct cfg80211_chan_def chandef
;
3899 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3901 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3902 IEEE80211_STA_DISABLE_80P80MHZ
|
3903 IEEE80211_STA_DISABLE_160MHZ
);
3907 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3908 sband
->ht_cap
.ht_supported
) {
3909 const u8
*ht_oper_ie
, *ht_cap_ie
;
3911 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3912 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3913 ht_oper
= (void *)(ht_oper_ie
+ 2);
3915 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3916 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
))
3917 ht_cap
= (void *)(ht_cap_ie
+ 2);
3920 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3925 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3926 sband
->vht_cap
.vht_supported
) {
3927 const u8
*vht_oper_ie
, *vht_cap
;
3929 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3930 WLAN_EID_VHT_OPERATION
);
3931 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3932 vht_oper
= (void *)(vht_oper_ie
+ 2);
3933 if (vht_oper
&& !ht_oper
) {
3936 "AP advertised VHT without HT, disabling both\n");
3937 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3938 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3941 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3942 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
3943 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3948 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3950 ht_cap
, ht_oper
, vht_oper
,
3953 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3958 /* will change later if needed */
3959 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3961 mutex_lock(&local
->mtx
);
3963 * If this fails (possibly due to channel context sharing
3964 * on incompatible channels, e.g. 80+80 and 160 sharing the
3965 * same control channel) try to use a smaller bandwidth.
3967 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3968 IEEE80211_CHANCTX_SHARED
);
3970 /* don't downgrade for 5 and 10 MHz channels, though. */
3971 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
3972 chandef
.width
== NL80211_CHAN_WIDTH_10
)
3975 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
3976 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
3977 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3978 IEEE80211_CHANCTX_SHARED
);
3981 mutex_unlock(&local
->mtx
);
3985 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3986 struct cfg80211_bss
*cbss
, bool assoc
)
3988 struct ieee80211_local
*local
= sdata
->local
;
3989 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3990 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3991 struct sta_info
*new_sta
= NULL
;
3992 bool have_sta
= false;
3995 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
4000 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
4005 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
4010 u32 rates
= 0, basic_rates
= 0;
4011 bool have_higher_than_11mbit
;
4012 int min_rate
= INT_MAX
, min_rate_index
= -1;
4013 struct ieee80211_chanctx_conf
*chanctx_conf
;
4014 struct ieee80211_supported_band
*sband
;
4015 const struct cfg80211_bss_ies
*ies
;
4019 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4021 err
= ieee80211_prep_channel(sdata
, cbss
);
4023 sta_info_free(local
, new_sta
);
4026 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
4029 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4030 if (WARN_ON(!chanctx_conf
)) {
4032 sta_info_free(local
, new_sta
);
4035 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
4038 ieee80211_get_rates(sband
, bss
->supp_rates
,
4039 bss
->supp_rates_len
,
4040 &rates
, &basic_rates
,
4041 &have_higher_than_11mbit
,
4042 &min_rate
, &min_rate_index
,
4046 * This used to be a workaround for basic rates missing
4047 * in the association response frame. Now that we no
4048 * longer use the basic rates from there, it probably
4049 * doesn't happen any more, but keep the workaround so
4050 * in case some *other* APs are buggy in different ways
4051 * we can connect -- with a warning.
4053 if (!basic_rates
&& min_rate_index
>= 0) {
4055 "No basic rates, using min rate instead\n");
4056 basic_rates
= BIT(min_rate_index
);
4059 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
4060 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
4062 /* cf. IEEE 802.11 9.2.12 */
4063 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
4064 have_higher_than_11mbit
)
4065 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
4067 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
4069 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
4071 /* set timing information */
4072 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
4074 ies
= rcu_dereference(cbss
->beacon_ies
);
4078 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4079 sdata
->vif
.bss_conf
.sync_device_ts
=
4080 bss
->device_ts_beacon
;
4081 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4082 ies
->data
, ies
->len
);
4083 if (tim_ie
&& tim_ie
[1] >= 2)
4084 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
4086 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4087 } else if (!(local
->hw
.flags
&
4088 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
4089 ies
= rcu_dereference(cbss
->proberesp_ies
);
4090 /* must be non-NULL since beacon IEs were NULL */
4091 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4092 sdata
->vif
.bss_conf
.sync_device_ts
=
4093 bss
->device_ts_presp
;
4094 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4096 sdata
->vif
.bss_conf
.sync_tsf
= 0;
4097 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
4098 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4102 /* tell driver about BSSID, basic rates and timing */
4103 ieee80211_bss_info_change_notify(sdata
,
4104 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
4105 BSS_CHANGED_BEACON_INT
);
4108 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
4110 err
= sta_info_insert(new_sta
);
4114 "failed to insert STA entry for the AP (error %d)\n",
4119 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4125 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4126 struct cfg80211_auth_request
*req
)
4128 struct ieee80211_local
*local
= sdata
->local
;
4129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4130 struct ieee80211_mgd_auth_data
*auth_data
;
4134 /* prepare auth data structure */
4136 switch (req
->auth_type
) {
4137 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4138 auth_alg
= WLAN_AUTH_OPEN
;
4140 case NL80211_AUTHTYPE_SHARED_KEY
:
4141 if (IS_ERR(local
->wep_tx_tfm
))
4143 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4145 case NL80211_AUTHTYPE_FT
:
4146 auth_alg
= WLAN_AUTH_FT
;
4148 case NL80211_AUTHTYPE_NETWORK_EAP
:
4149 auth_alg
= WLAN_AUTH_LEAP
;
4151 case NL80211_AUTHTYPE_SAE
:
4152 auth_alg
= WLAN_AUTH_SAE
;
4158 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4159 req
->ie_len
, GFP_KERNEL
);
4163 auth_data
->bss
= req
->bss
;
4165 if (req
->sae_data_len
>= 4) {
4166 __le16
*pos
= (__le16
*) req
->sae_data
;
4167 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4168 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4169 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4170 req
->sae_data_len
- 4);
4171 auth_data
->data_len
+= req
->sae_data_len
- 4;
4174 if (req
->ie
&& req
->ie_len
) {
4175 memcpy(&auth_data
->data
[auth_data
->data_len
],
4176 req
->ie
, req
->ie_len
);
4177 auth_data
->data_len
+= req
->ie_len
;
4180 if (req
->key
&& req
->key_len
) {
4181 auth_data
->key_len
= req
->key_len
;
4182 auth_data
->key_idx
= req
->key_idx
;
4183 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4186 auth_data
->algorithm
= auth_alg
;
4188 /* try to authenticate/probe */
4190 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4191 ifmgd
->assoc_data
) {
4196 if (ifmgd
->auth_data
)
4197 ieee80211_destroy_auth_data(sdata
, false);
4199 /* prep auth_data so we don't go into idle on disassoc */
4200 ifmgd
->auth_data
= auth_data
;
4202 if (ifmgd
->associated
) {
4203 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4205 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4206 WLAN_REASON_UNSPECIFIED
,
4209 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4213 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4215 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
4219 err
= ieee80211_probe_auth(sdata
);
4221 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4225 /* hold our own reference */
4226 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4230 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4231 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4232 ifmgd
->auth_data
= NULL
;
4238 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data
*sdata
,
4239 const u8
*wmm_param
, int len
)
4247 if (wmm_param
[5] != 1 /* version */)
4250 pos
= wmm_param
+ 8;
4253 for (; left
>= 4; left
-= 4, pos
+= 4) {
4254 u8 aifsn
= pos
[0] & 0x0f;
4255 u8 ecwmin
= pos
[1] & 0x0f;
4256 u8 ecwmax
= (pos
[1] & 0xf0) >> 4;
4257 int aci
= (pos
[0] >> 5) & 0x03;
4261 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4265 if (ecwmin
> ecwmax
) {
4267 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4268 ecwmin
, ecwmax
, aci
);
4276 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4277 struct cfg80211_assoc_request
*req
)
4279 struct ieee80211_local
*local
= sdata
->local
;
4280 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4281 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4282 struct ieee80211_mgd_assoc_data
*assoc_data
;
4283 const struct cfg80211_bss_ies
*beacon_ies
;
4284 struct ieee80211_supported_band
*sband
;
4285 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4288 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4293 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4299 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4300 assoc_data
->ssid_len
= ssidie
[1];
4303 if (ifmgd
->associated
) {
4304 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4306 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4307 WLAN_REASON_UNSPECIFIED
,
4310 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4314 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4319 if (ifmgd
->assoc_data
) {
4324 if (ifmgd
->auth_data
) {
4327 /* keep sta info, bssid if matching */
4328 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4329 ieee80211_destroy_auth_data(sdata
, match
);
4332 /* prepare assoc data */
4334 ifmgd
->beacon_crc_valid
= false;
4336 assoc_data
->wmm
= bss
->wmm_used
&&
4337 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4338 if (assoc_data
->wmm
) {
4339 /* try to check validity of WMM params IE */
4340 const struct cfg80211_bss_ies
*ies
;
4341 const u8
*wp
, *start
, *end
;
4344 ies
= rcu_dereference(req
->bss
->ies
);
4346 end
= start
+ ies
->len
;
4349 wp
= cfg80211_find_vendor_ie(
4351 WLAN_OUI_TYPE_MICROSOFT_WMM
,
4352 start
, end
- start
);
4355 start
= wp
+ wp
[1] + 2;
4356 /* if this IE is too short, try the next */
4359 /* if this IE is WMM params, we found what we wanted */
4364 if (!wp
|| !ieee80211_usable_wmm_params(sdata
, wp
+ 2,
4366 assoc_data
->wmm
= false;
4367 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
4373 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4374 * We still associate in non-HT mode (11a/b/g) if any one of these
4375 * ciphers is configured as pairwise.
4376 * We can set this to true for non-11n hardware, that'll be checked
4377 * separately along with the peer capabilities.
4379 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4380 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4381 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4382 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4383 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4384 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4385 netdev_info(sdata
->dev
,
4386 "disabling HT/VHT due to WEP/TKIP use\n");
4390 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4391 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4392 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4395 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4396 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4398 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4399 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4400 if (!sband
->ht_cap
.ht_supported
||
4401 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4402 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4403 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4404 if (!bss
->wmm_used
&&
4405 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4406 netdev_info(sdata
->dev
,
4407 "disabling HT as WMM/QoS is not supported by the AP\n");
4410 /* disable VHT if we don't support it or the AP doesn't use WMM */
4411 if (!sband
->vht_cap
.vht_supported
||
4412 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4413 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4414 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4415 if (!bss
->wmm_used
&&
4416 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4417 netdev_info(sdata
->dev
,
4418 "disabling VHT as WMM/QoS is not supported by the AP\n");
4421 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4422 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4423 sizeof(ifmgd
->ht_capa_mask
));
4425 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4426 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4427 sizeof(ifmgd
->vht_capa_mask
));
4429 if (req
->ie
&& req
->ie_len
) {
4430 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4431 assoc_data
->ie_len
= req
->ie_len
;
4434 assoc_data
->bss
= req
->bss
;
4436 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4437 if (ifmgd
->powersave
)
4438 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4440 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4442 sdata
->smps_mode
= ifmgd
->req_smps
;
4444 assoc_data
->capability
= req
->bss
->capability
;
4445 assoc_data
->supp_rates
= bss
->supp_rates
;
4446 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4449 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4450 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4451 assoc_data
->ap_ht_param
=
4452 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4454 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4455 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4456 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4457 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4458 sizeof(struct ieee80211_vht_cap
));
4460 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4463 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4464 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
4465 assoc_data
->uapsd
= true;
4466 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4468 assoc_data
->uapsd
= false;
4469 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4472 if (req
->prev_bssid
)
4473 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4476 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4477 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4479 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4480 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4483 if (req
->flags
& ASSOC_REQ_USE_RRM
)
4484 ifmgd
->flags
|= IEEE80211_STA_ENABLE_RRM
;
4486 ifmgd
->flags
&= ~IEEE80211_STA_ENABLE_RRM
;
4488 if (req
->crypto
.control_port
)
4489 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4491 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4493 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4494 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4495 sdata
->encrypt_headroom
= ieee80211_cs_headroom(local
, &req
->crypto
,
4498 /* kick off associate process */
4500 ifmgd
->assoc_data
= assoc_data
;
4501 ifmgd
->dtim_period
= 0;
4502 ifmgd
->have_beacon
= false;
4504 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4509 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4511 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4514 * Wait up to one beacon interval ...
4515 * should this be more if we miss one?
4517 sdata_info(sdata
, "waiting for beacon from %pM\n",
4519 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4520 assoc_data
->timeout_started
= true;
4521 assoc_data
->need_beacon
= true;
4522 } else if (beacon_ies
) {
4523 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4528 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4529 const struct ieee80211_tim_ie
*tim
;
4530 tim
= (void *)(tim_ie
+ 2);
4531 ifmgd
->dtim_period
= tim
->dtim_period
;
4532 dtim_count
= tim
->dtim_count
;
4534 ifmgd
->have_beacon
= true;
4535 assoc_data
->timeout
= jiffies
;
4536 assoc_data
->timeout_started
= true;
4538 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4539 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4540 sdata
->vif
.bss_conf
.sync_device_ts
=
4541 bss
->device_ts_beacon
;
4542 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4545 assoc_data
->timeout
= jiffies
;
4546 assoc_data
->timeout_started
= true;
4550 run_again(sdata
, assoc_data
->timeout
);
4552 if (bss
->corrupt_data
) {
4553 char *corrupt_type
= "data";
4554 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4555 if (bss
->corrupt_data
&
4556 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4557 corrupt_type
= "beacon and probe response";
4559 corrupt_type
= "beacon";
4560 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4561 corrupt_type
= "probe response";
4562 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4568 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4569 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4570 ifmgd
->assoc_data
= NULL
;
4576 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4577 struct cfg80211_deauth_request
*req
)
4579 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4580 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4581 bool tx
= !req
->local_state_change
;
4583 if (ifmgd
->auth_data
&&
4584 ether_addr_equal(ifmgd
->auth_data
->bss
->bssid
, req
->bssid
)) {
4586 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4587 req
->bssid
, req
->reason_code
,
4588 ieee80211_get_reason_code_string(req
->reason_code
));
4590 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4591 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4592 IEEE80211_STYPE_DEAUTH
,
4593 req
->reason_code
, tx
,
4595 ieee80211_destroy_auth_data(sdata
, false);
4596 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4597 IEEE80211_DEAUTH_FRAME_LEN
);
4602 if (ifmgd
->associated
&&
4603 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4605 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4606 req
->bssid
, req
->reason_code
,
4607 ieee80211_get_reason_code_string(req
->reason_code
));
4609 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4610 req
->reason_code
, tx
, frame_buf
);
4611 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4612 IEEE80211_DEAUTH_FRAME_LEN
);
4619 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4620 struct cfg80211_disassoc_request
*req
)
4622 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4624 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4627 * cfg80211 should catch this ... but it's racy since
4628 * we can receive a disassoc frame, process it, hand it
4629 * to cfg80211 while that's in a locked section already
4630 * trying to tell us that the user wants to disconnect.
4632 if (ifmgd
->associated
!= req
->bss
)
4636 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4637 req
->bss
->bssid
, req
->reason_code
, ieee80211_get_reason_code_string(req
->reason_code
));
4639 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4640 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4641 req
->reason_code
, !req
->local_state_change
,
4644 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4645 IEEE80211_DEAUTH_FRAME_LEN
);
4650 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4652 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4655 * Make sure some work items will not run after this,
4656 * they will not do anything but might not have been
4657 * cancelled when disconnecting.
4659 cancel_work_sync(&ifmgd
->monitor_work
);
4660 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4661 cancel_work_sync(&ifmgd
->request_smps_work
);
4662 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4663 cancel_work_sync(&ifmgd
->chswitch_work
);
4664 cancel_delayed_work_sync(&ifmgd
->tdls_peer_del_work
);
4667 if (ifmgd
->assoc_data
) {
4668 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
4669 ieee80211_destroy_assoc_data(sdata
, false);
4670 cfg80211_assoc_timeout(sdata
->dev
, bss
);
4672 if (ifmgd
->auth_data
)
4673 ieee80211_destroy_auth_data(sdata
, false);
4674 del_timer_sync(&ifmgd
->timer
);
4675 sdata_unlock(sdata
);
4678 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4679 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4682 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4684 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4686 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4688 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);