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_FAST_BSS_TRANSITION
, /* reassoc only */
779 WLAN_EID_RIC_DATA
, /* reassoc only */
780 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
782 static const u8 after_ric
[] = {
783 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
784 WLAN_EID_HT_CAPABILITY
,
785 WLAN_EID_BSS_COEX_2040
,
786 WLAN_EID_EXT_CAPABILITY
,
787 WLAN_EID_QOS_TRAFFIC_CAPA
,
788 WLAN_EID_TIM_BCAST_REQ
,
789 WLAN_EID_INTERWORKING
,
790 /* 60GHz doesn't happen right now */
791 WLAN_EID_VHT_CAPABILITY
,
792 WLAN_EID_OPMODE_NOTIF
,
795 noffset
= ieee80211_ie_split_ric(assoc_data
->ie
,
798 ARRAY_SIZE(before_ht
),
800 ARRAY_SIZE(after_ric
),
802 pos
= skb_put(skb
, noffset
- offset
);
803 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
807 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
808 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
809 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
811 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
812 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
813 sband
, chan
, sdata
->smps_mode
);
815 /* if present, add any custom IEs that go before VHT */
816 if (assoc_data
->ie_len
) {
817 static const u8 before_vht
[] = {
820 WLAN_EID_EXT_SUPP_RATES
,
821 WLAN_EID_PWR_CAPABILITY
,
822 WLAN_EID_SUPPORTED_CHANNELS
,
825 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
826 WLAN_EID_MOBILITY_DOMAIN
,
827 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
828 WLAN_EID_HT_CAPABILITY
,
829 WLAN_EID_BSS_COEX_2040
,
830 WLAN_EID_EXT_CAPABILITY
,
831 WLAN_EID_QOS_TRAFFIC_CAPA
,
832 WLAN_EID_TIM_BCAST_REQ
,
833 WLAN_EID_INTERWORKING
,
836 /* RIC already taken above, so no need to handle here anymore */
837 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
838 before_vht
, ARRAY_SIZE(before_vht
),
840 pos
= skb_put(skb
, noffset
- offset
);
841 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
845 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
846 ieee80211_add_vht_ie(sdata
, skb
, sband
,
847 &assoc_data
->ap_vht_cap
);
849 /* if present, add any custom non-vendor IEs that go after HT */
850 if (assoc_data
->ie_len
) {
851 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
854 pos
= skb_put(skb
, noffset
- offset
);
855 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
859 if (assoc_data
->wmm
) {
860 if (assoc_data
->uapsd
) {
861 qos_info
= ifmgd
->uapsd_queues
;
862 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
863 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
868 pos
= ieee80211_add_wmm_info_ie(skb_put(skb
, 9), qos_info
);
871 /* add any remaining custom (i.e. vendor specific here) IEs */
872 if (assoc_data
->ie_len
) {
873 noffset
= assoc_data
->ie_len
;
874 pos
= skb_put(skb
, noffset
- offset
);
875 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
878 drv_mgd_prepare_tx(local
, sdata
);
880 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
881 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
882 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
883 IEEE80211_TX_INTFL_MLME_CONN_TX
;
884 ieee80211_tx_skb(sdata
, skb
);
887 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
888 struct ieee80211_sub_if_data
*sdata
)
890 struct ieee80211_pspoll
*pspoll
;
893 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
897 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
898 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
900 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
901 ieee80211_tx_skb(sdata
, skb
);
904 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
905 struct ieee80211_sub_if_data
*sdata
,
909 struct ieee80211_hdr_3addr
*nullfunc
;
910 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
912 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
916 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
918 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
920 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
921 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
923 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
924 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
926 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
927 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
929 ieee80211_tx_skb(sdata
, skb
);
932 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
933 struct ieee80211_sub_if_data
*sdata
)
936 struct ieee80211_hdr
*nullfunc
;
939 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
942 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
946 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
948 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
949 memset(nullfunc
, 0, 30);
950 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
951 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
952 nullfunc
->frame_control
= fc
;
953 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
954 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
955 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
956 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
958 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
959 ieee80211_tx_skb(sdata
, skb
);
962 /* spectrum management related things */
963 static void ieee80211_chswitch_work(struct work_struct
*work
)
965 struct ieee80211_sub_if_data
*sdata
=
966 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
967 struct ieee80211_local
*local
= sdata
->local
;
968 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
971 if (!ieee80211_sdata_running(sdata
))
975 mutex_lock(&local
->mtx
);
976 mutex_lock(&local
->chanctx_mtx
);
978 if (!ifmgd
->associated
)
981 if (!sdata
->vif
.csa_active
)
985 * using reservation isn't immediate as it may be deferred until later
986 * with multi-vif. once reservation is complete it will re-schedule the
987 * work with no reserved_chanctx so verify chandef to check if it
988 * completed successfully
991 if (sdata
->reserved_chanctx
) {
993 * with multi-vif csa driver may call ieee80211_csa_finish()
994 * many times while waiting for other interfaces to use their
997 if (sdata
->reserved_ready
)
1000 ret
= ieee80211_vif_use_reserved_context(sdata
);
1003 "failed to use reserved channel context, disconnecting (err=%d)\n",
1005 ieee80211_queue_work(&sdata
->local
->hw
,
1006 &ifmgd
->csa_connection_drop_work
);
1013 if (!cfg80211_chandef_identical(&sdata
->vif
.bss_conf
.chandef
,
1014 &sdata
->csa_chandef
)) {
1016 "failed to finalize channel switch, disconnecting\n");
1017 ieee80211_queue_work(&sdata
->local
->hw
,
1018 &ifmgd
->csa_connection_drop_work
);
1022 /* XXX: shouldn't really modify cfg80211-owned data! */
1023 ifmgd
->associated
->channel
= sdata
->csa_chandef
.chan
;
1025 ifmgd
->csa_waiting_bcn
= true;
1027 ieee80211_sta_reset_beacon_monitor(sdata
);
1028 ieee80211_sta_reset_conn_monitor(sdata
);
1031 mutex_unlock(&local
->chanctx_mtx
);
1032 mutex_unlock(&local
->mtx
);
1033 sdata_unlock(sdata
);
1036 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data
*sdata
)
1038 struct ieee80211_local
*local
= sdata
->local
;
1039 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1042 sdata_assert_lock(sdata
);
1044 WARN_ON(!sdata
->vif
.csa_active
);
1046 if (sdata
->csa_block_tx
) {
1047 ieee80211_wake_vif_queues(local
, sdata
,
1048 IEEE80211_QUEUE_STOP_REASON_CSA
);
1049 sdata
->csa_block_tx
= false;
1052 cfg80211_ch_switch_notify(sdata
->dev
, &sdata
->reserved_chandef
);
1054 sdata
->vif
.csa_active
= false;
1055 ifmgd
->csa_waiting_bcn
= false;
1057 ret
= drv_post_channel_switch(sdata
);
1060 "driver post channel switch failed, disconnecting\n");
1061 ieee80211_queue_work(&local
->hw
,
1062 &ifmgd
->csa_connection_drop_work
);
1067 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
1069 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1070 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1072 trace_api_chswitch_done(sdata
, success
);
1075 "driver channel switch failed, disconnecting\n");
1076 ieee80211_queue_work(&sdata
->local
->hw
,
1077 &ifmgd
->csa_connection_drop_work
);
1079 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
1082 EXPORT_SYMBOL(ieee80211_chswitch_done
);
1084 static void ieee80211_chswitch_timer(unsigned long data
)
1086 struct ieee80211_sub_if_data
*sdata
=
1087 (struct ieee80211_sub_if_data
*) data
;
1089 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
1093 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
1094 u64 timestamp
, u32 device_timestamp
,
1095 struct ieee802_11_elems
*elems
,
1098 struct ieee80211_local
*local
= sdata
->local
;
1099 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1100 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
1101 struct ieee80211_chanctx_conf
*conf
;
1102 struct ieee80211_chanctx
*chanctx
;
1103 enum ieee80211_band current_band
;
1104 struct ieee80211_csa_ie csa_ie
;
1105 struct ieee80211_channel_switch ch_switch
;
1108 sdata_assert_lock(sdata
);
1113 if (local
->scanning
)
1116 /* disregard subsequent announcements if we are already processing */
1117 if (sdata
->vif
.csa_active
)
1120 current_band
= cbss
->channel
->band
;
1121 memset(&csa_ie
, 0, sizeof(csa_ie
));
1122 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, beacon
, current_band
,
1124 ifmgd
->associated
->bssid
, &csa_ie
);
1126 ieee80211_queue_work(&local
->hw
,
1127 &ifmgd
->csa_connection_drop_work
);
1131 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
1132 IEEE80211_CHAN_DISABLED
)) {
1134 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1135 ifmgd
->associated
->bssid
,
1136 csa_ie
.chandef
.chan
->center_freq
,
1137 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
1138 csa_ie
.chandef
.center_freq2
);
1139 ieee80211_queue_work(&local
->hw
,
1140 &ifmgd
->csa_connection_drop_work
);
1144 mutex_lock(&local
->mtx
);
1145 mutex_lock(&local
->chanctx_mtx
);
1146 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1147 lockdep_is_held(&local
->chanctx_mtx
));
1150 "no channel context assigned to vif?, disconnecting\n");
1151 ieee80211_queue_work(&local
->hw
,
1152 &ifmgd
->csa_connection_drop_work
);
1153 mutex_unlock(&local
->chanctx_mtx
);
1154 mutex_unlock(&local
->mtx
);
1158 chanctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1160 if (local
->use_chanctx
&&
1161 !(local
->hw
.flags
& IEEE80211_HW_CHANCTX_STA_CSA
)) {
1163 "driver doesn't support chan-switch with channel contexts\n");
1164 ieee80211_queue_work(&local
->hw
,
1165 &ifmgd
->csa_connection_drop_work
);
1166 mutex_unlock(&local
->chanctx_mtx
);
1167 mutex_unlock(&local
->mtx
);
1171 ch_switch
.timestamp
= timestamp
;
1172 ch_switch
.device_timestamp
= device_timestamp
;
1173 ch_switch
.block_tx
= csa_ie
.mode
;
1174 ch_switch
.chandef
= csa_ie
.chandef
;
1175 ch_switch
.count
= csa_ie
.count
;
1177 if (drv_pre_channel_switch(sdata
, &ch_switch
)) {
1179 "preparing for channel switch failed, disconnecting\n");
1180 ieee80211_queue_work(&local
->hw
,
1181 &ifmgd
->csa_connection_drop_work
);
1182 mutex_unlock(&local
->chanctx_mtx
);
1183 mutex_unlock(&local
->mtx
);
1187 res
= ieee80211_vif_reserve_chanctx(sdata
, &csa_ie
.chandef
,
1188 chanctx
->mode
, false);
1191 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1193 ieee80211_queue_work(&local
->hw
,
1194 &ifmgd
->csa_connection_drop_work
);
1195 mutex_unlock(&local
->chanctx_mtx
);
1196 mutex_unlock(&local
->mtx
);
1199 mutex_unlock(&local
->chanctx_mtx
);
1201 sdata
->vif
.csa_active
= true;
1202 sdata
->csa_chandef
= csa_ie
.chandef
;
1203 sdata
->csa_block_tx
= csa_ie
.mode
;
1205 if (sdata
->csa_block_tx
)
1206 ieee80211_stop_vif_queues(local
, sdata
,
1207 IEEE80211_QUEUE_STOP_REASON_CSA
);
1208 mutex_unlock(&local
->mtx
);
1210 cfg80211_ch_switch_started_notify(sdata
->dev
, &csa_ie
.chandef
,
1213 if (local
->ops
->channel_switch
) {
1214 /* use driver's channel switch callback */
1215 drv_channel_switch(local
, sdata
, &ch_switch
);
1219 /* channel switch handled in software */
1220 if (csa_ie
.count
<= 1)
1221 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1223 mod_timer(&ifmgd
->chswitch_timer
,
1224 TU_TO_EXP_TIME(csa_ie
.count
* cbss
->beacon_interval
));
1228 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1229 struct ieee80211_channel
*channel
,
1230 const u8
*country_ie
, u8 country_ie_len
,
1231 const u8
*pwr_constr_elem
,
1232 int *chan_pwr
, int *pwr_reduction
)
1234 struct ieee80211_country_ie_triplet
*triplet
;
1235 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1236 int i
, chan_increment
;
1237 bool have_chan_pwr
= false;
1240 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1243 triplet
= (void *)(country_ie
+ 3);
1244 country_ie_len
-= 3;
1246 switch (channel
->band
) {
1250 case IEEE80211_BAND_2GHZ
:
1251 case IEEE80211_BAND_60GHZ
:
1254 case IEEE80211_BAND_5GHZ
:
1260 while (country_ie_len
>= 3) {
1261 u8 first_channel
= triplet
->chans
.first_channel
;
1263 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1266 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1267 if (first_channel
+ i
* chan_increment
== chan
) {
1268 have_chan_pwr
= true;
1269 *chan_pwr
= triplet
->chans
.max_power
;
1278 country_ie_len
-= 3;
1282 *pwr_reduction
= *pwr_constr_elem
;
1283 return have_chan_pwr
;
1286 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data
*sdata
,
1287 struct ieee80211_channel
*channel
,
1288 const u8
*cisco_dtpc_ie
,
1291 /* From practical testing, the first data byte of the DTPC element
1292 * seems to contain the requested dBm level, and the CLI on Cisco
1293 * APs clearly state the range is -127 to 127 dBm, which indicates
1294 * a signed byte, although it seemingly never actually goes negative.
1295 * The other byte seems to always be zero.
1297 *pwr_level
= (__s8
)cisco_dtpc_ie
[4];
1300 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1301 struct ieee80211_channel
*channel
,
1302 struct ieee80211_mgmt
*mgmt
,
1303 const u8
*country_ie
, u8 country_ie_len
,
1304 const u8
*pwr_constr_ie
,
1305 const u8
*cisco_dtpc_ie
)
1307 bool has_80211h_pwr
= false, has_cisco_pwr
= false;
1308 int chan_pwr
= 0, pwr_reduction_80211h
= 0;
1309 int pwr_level_cisco
, pwr_level_80211h
;
1312 if (country_ie
&& pwr_constr_ie
&&
1313 mgmt
->u
.probe_resp
.capab_info
&
1314 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
)) {
1315 has_80211h_pwr
= ieee80211_find_80211h_pwr_constr(
1316 sdata
, channel
, country_ie
, country_ie_len
,
1317 pwr_constr_ie
, &chan_pwr
, &pwr_reduction_80211h
);
1319 max_t(int, 0, chan_pwr
- pwr_reduction_80211h
);
1322 if (cisco_dtpc_ie
) {
1323 ieee80211_find_cisco_dtpc(
1324 sdata
, channel
, cisco_dtpc_ie
, &pwr_level_cisco
);
1325 has_cisco_pwr
= true;
1328 if (!has_80211h_pwr
&& !has_cisco_pwr
)
1331 /* If we have both 802.11h and Cisco DTPC, apply both limits
1332 * by picking the smallest of the two power levels advertised.
1334 if (has_80211h_pwr
&&
1335 (!has_cisco_pwr
|| pwr_level_80211h
<= pwr_level_cisco
)) {
1337 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1338 pwr_level_80211h
, chan_pwr
, pwr_reduction_80211h
,
1339 sdata
->u
.mgd
.bssid
);
1340 new_ap_level
= pwr_level_80211h
;
1341 } else { /* has_cisco_pwr is always true here. */
1343 "Limiting TX power to %d dBm as advertised by %pM\n",
1344 pwr_level_cisco
, sdata
->u
.mgd
.bssid
);
1345 new_ap_level
= pwr_level_cisco
;
1348 if (sdata
->ap_power_level
== new_ap_level
)
1351 sdata
->ap_power_level
= new_ap_level
;
1352 if (__ieee80211_recalc_txpower(sdata
))
1353 return BSS_CHANGED_TXPOWER
;
1358 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1359 struct ieee80211_sub_if_data
*sdata
)
1361 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1364 * If we are scanning right now then the parameters will
1365 * take effect when scan finishes.
1367 if (local
->scanning
)
1370 if (conf
->dynamic_ps_timeout
> 0 &&
1371 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1372 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1373 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1375 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1376 ieee80211_send_nullfunc(local
, sdata
, 1);
1378 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1379 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1382 conf
->flags
|= IEEE80211_CONF_PS
;
1383 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1387 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1389 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1391 if (local
->ps_sdata
) {
1392 ieee80211_enable_ps(local
, local
->ps_sdata
);
1393 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1394 conf
->flags
&= ~IEEE80211_CONF_PS
;
1395 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1396 del_timer_sync(&local
->dynamic_ps_timer
);
1397 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1401 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1403 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1404 struct sta_info
*sta
= NULL
;
1405 bool authorized
= false;
1407 if (!mgd
->powersave
)
1413 if (!mgd
->associated
)
1416 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1419 if (!mgd
->have_beacon
)
1423 sta
= sta_info_get(sdata
, mgd
->bssid
);
1425 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1431 /* need to hold RTNL or interface lock */
1432 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1434 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1438 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1439 local
->ps_sdata
= NULL
;
1443 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1444 if (!ieee80211_sdata_running(sdata
))
1446 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1447 /* If an AP vif is found, then disable PS
1448 * by setting the count to zero thereby setting
1454 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1460 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1464 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1466 beaconint_us
= ieee80211_tu_to_usec(
1467 found
->vif
.bss_conf
.beacon_int
);
1469 timeout
= local
->dynamic_ps_forced_timeout
;
1472 * Go to full PSM if the user configures a very low
1473 * latency requirement.
1474 * The 2000 second value is there for compatibility
1475 * until the PM_QOS_NETWORK_LATENCY is configured
1478 if (latency
> (1900 * USEC_PER_MSEC
) &&
1479 latency
!= (2000 * USEC_PER_SEC
))
1484 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1486 if (beaconint_us
> latency
) {
1487 local
->ps_sdata
= NULL
;
1490 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1492 /* If the TIM IE is invalid, pretend the value is 1 */
1495 else if (dtimper
> 1)
1496 maxslp
= min_t(int, dtimper
,
1497 latency
/ beaconint_us
);
1499 local
->hw
.conf
.max_sleep_period
= maxslp
;
1500 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1501 local
->ps_sdata
= found
;
1504 local
->ps_sdata
= NULL
;
1507 ieee80211_change_ps(local
);
1510 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1512 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1514 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1515 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1516 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1520 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1522 struct ieee80211_local
*local
=
1523 container_of(work
, struct ieee80211_local
,
1524 dynamic_ps_disable_work
);
1526 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1527 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1528 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1531 ieee80211_wake_queues_by_reason(&local
->hw
,
1532 IEEE80211_MAX_QUEUE_MAP
,
1533 IEEE80211_QUEUE_STOP_REASON_PS
,
1537 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1539 struct ieee80211_local
*local
=
1540 container_of(work
, struct ieee80211_local
,
1541 dynamic_ps_enable_work
);
1542 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1543 struct ieee80211_if_managed
*ifmgd
;
1544 unsigned long flags
;
1547 /* can only happen when PS was just disabled anyway */
1551 ifmgd
= &sdata
->u
.mgd
;
1553 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1556 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1557 /* don't enter PS if TX frames are pending */
1558 if (drv_tx_frames_pending(local
)) {
1559 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1561 local
->hw
.conf
.dynamic_ps_timeout
));
1566 * transmission can be stopped by others which leads to
1567 * dynamic_ps_timer expiry. Postpone the ps timer if it
1568 * is not the actual idle state.
1570 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1571 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1572 if (local
->queue_stop_reasons
[q
]) {
1573 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1575 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1577 local
->hw
.conf
.dynamic_ps_timeout
));
1581 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1584 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1585 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1586 if (drv_tx_frames_pending(local
)) {
1587 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1589 local
->hw
.conf
.dynamic_ps_timeout
));
1591 ieee80211_send_nullfunc(local
, sdata
, 1);
1592 /* Flush to get the tx status of nullfunc frame */
1593 ieee80211_flush_queues(local
, sdata
);
1597 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1598 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1599 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1600 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1601 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1602 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1606 void ieee80211_dynamic_ps_timer(unsigned long data
)
1608 struct ieee80211_local
*local
= (void *) data
;
1610 if (local
->quiescing
|| local
->suspended
)
1613 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1616 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1618 struct delayed_work
*delayed_work
=
1619 container_of(work
, struct delayed_work
, work
);
1620 struct ieee80211_sub_if_data
*sdata
=
1621 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1622 dfs_cac_timer_work
);
1623 struct cfg80211_chan_def chandef
= sdata
->vif
.bss_conf
.chandef
;
1625 mutex_lock(&sdata
->local
->mtx
);
1626 if (sdata
->wdev
.cac_started
) {
1627 ieee80211_vif_release_channel(sdata
);
1628 cfg80211_cac_event(sdata
->dev
, &chandef
,
1629 NL80211_RADAR_CAC_FINISHED
,
1632 mutex_unlock(&sdata
->local
->mtx
);
1636 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1638 struct ieee80211_local
*local
= sdata
->local
;
1639 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1643 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1646 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1647 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
1649 unsigned long now
= jiffies
;
1651 if (tx_tspec
->action
== TX_TSPEC_ACTION_NONE
&&
1652 tx_tspec
->admitted_time
&&
1653 time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1654 tx_tspec
->consumed_tx_time
= 0;
1655 tx_tspec
->time_slice_start
= now
;
1657 if (tx_tspec
->downgraded
)
1659 TX_TSPEC_ACTION_STOP_DOWNGRADE
;
1662 switch (tx_tspec
->action
) {
1663 case TX_TSPEC_ACTION_STOP_DOWNGRADE
:
1664 /* take the original parameters */
1665 if (drv_conf_tx(local
, sdata
, ac
, &sdata
->tx_conf
[ac
]))
1667 "failed to set TX queue parameters for queue %d\n",
1669 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1670 tx_tspec
->downgraded
= false;
1673 case TX_TSPEC_ACTION_DOWNGRADE
:
1674 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
1675 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1679 /* downgrade next lower non-ACM AC */
1680 for (non_acm_ac
= ac
+ 1;
1681 non_acm_ac
< IEEE80211_NUM_ACS
;
1683 if (!(sdata
->wmm_acm
& BIT(7 - 2 * non_acm_ac
)))
1685 /* The loop will result in using BK even if it requires
1686 * admission control, such configuration makes no sense
1687 * and we have to transmit somehow - the AC selection
1688 * does the same thing.
1690 if (drv_conf_tx(local
, sdata
, ac
,
1691 &sdata
->tx_conf
[non_acm_ac
]))
1693 "failed to set TX queue parameters for queue %d\n",
1695 tx_tspec
->action
= TX_TSPEC_ACTION_NONE
;
1697 schedule_delayed_work(&ifmgd
->tx_tspec_wk
,
1698 tx_tspec
->time_slice_start
+ HZ
- now
+ 1);
1700 case TX_TSPEC_ACTION_NONE
:
1709 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data
*sdata
)
1711 if (__ieee80211_sta_handle_tspec_ac_params(sdata
))
1712 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
1715 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct
*work
)
1717 struct ieee80211_sub_if_data
*sdata
;
1719 sdata
= container_of(work
, struct ieee80211_sub_if_data
,
1720 u
.mgd
.tx_tspec_wk
.work
);
1721 ieee80211_sta_handle_tspec_ac_params(sdata
);
1725 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1726 struct ieee80211_sub_if_data
*sdata
,
1727 const u8
*wmm_param
, size_t wmm_param_len
)
1729 struct ieee80211_tx_queue_params params
;
1730 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1734 u8 uapsd_queues
= 0;
1736 if (!local
->ops
->conf_tx
)
1739 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1745 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1748 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1749 uapsd_queues
= ifmgd
->uapsd_queues
;
1751 count
= wmm_param
[6] & 0x0f;
1752 if (count
== ifmgd
->wmm_last_param_set
)
1754 ifmgd
->wmm_last_param_set
= count
;
1756 pos
= wmm_param
+ 8;
1757 left
= wmm_param_len
- 8;
1759 memset(¶ms
, 0, sizeof(params
));
1762 for (; left
>= 4; left
-= 4, pos
+= 4) {
1763 int aci
= (pos
[0] >> 5) & 0x03;
1764 int acm
= (pos
[0] >> 4) & 0x01;
1772 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1773 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1779 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1780 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1786 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1787 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1794 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1795 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1800 params
.aifs
= pos
[0] & 0x0f;
1801 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1802 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1803 params
.txop
= get_unaligned_le16(pos
+ 2);
1805 params
.uapsd
= uapsd
;
1808 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1810 params
.aifs
, params
.cw_min
, params
.cw_max
,
1811 params
.txop
, params
.uapsd
,
1812 ifmgd
->tx_tspec
[queue
].downgraded
);
1813 sdata
->tx_conf
[queue
] = params
;
1814 if (!ifmgd
->tx_tspec
[queue
].downgraded
&&
1815 drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1817 "failed to set TX queue parameters for queue %d\n",
1821 /* enable WMM or activate new settings */
1822 sdata
->vif
.bss_conf
.qos
= true;
1826 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1828 lockdep_assert_held(&sdata
->local
->mtx
);
1830 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1831 ieee80211_run_deferred_scan(sdata
->local
);
1834 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1836 mutex_lock(&sdata
->local
->mtx
);
1837 __ieee80211_stop_poll(sdata
);
1838 mutex_unlock(&sdata
->local
->mtx
);
1841 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1842 u16 capab
, bool erp_valid
, u8 erp
)
1844 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1846 bool use_protection
;
1847 bool use_short_preamble
;
1848 bool use_short_slot
;
1851 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1852 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1854 use_protection
= false;
1855 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1858 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1859 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1860 use_short_slot
= true;
1862 if (use_protection
!= bss_conf
->use_cts_prot
) {
1863 bss_conf
->use_cts_prot
= use_protection
;
1864 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1867 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1868 bss_conf
->use_short_preamble
= use_short_preamble
;
1869 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1872 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1873 bss_conf
->use_short_slot
= use_short_slot
;
1874 changed
|= BSS_CHANGED_ERP_SLOT
;
1880 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1881 struct cfg80211_bss
*cbss
,
1882 u32 bss_info_changed
)
1884 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1885 struct ieee80211_local
*local
= sdata
->local
;
1886 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1888 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1889 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1890 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1892 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1893 beacon_loss_count
* bss_conf
->beacon_int
));
1895 sdata
->u
.mgd
.associated
= cbss
;
1896 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1898 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1900 if (sdata
->vif
.p2p
) {
1901 const struct cfg80211_bss_ies
*ies
;
1904 ies
= rcu_dereference(cbss
->ies
);
1908 ret
= cfg80211_get_p2p_attr(
1909 ies
->data
, ies
->len
,
1910 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1911 (u8
*) &bss_conf
->p2p_noa_attr
,
1912 sizeof(bss_conf
->p2p_noa_attr
));
1914 sdata
->u
.mgd
.p2p_noa_index
=
1915 bss_conf
->p2p_noa_attr
.index
;
1916 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1922 /* just to be sure */
1923 ieee80211_stop_poll(sdata
);
1925 ieee80211_led_assoc(local
, 1);
1927 if (sdata
->u
.mgd
.have_beacon
) {
1929 * If the AP is buggy we may get here with no DTIM period
1930 * known, so assume it's 1 which is the only safe assumption
1931 * in that case, although if the TIM IE is broken powersave
1932 * probably just won't work at all.
1934 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1935 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1936 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1938 bss_conf
->beacon_rate
= NULL
;
1939 bss_conf
->dtim_period
= 0;
1942 bss_conf
->assoc
= 1;
1944 /* Tell the driver to monitor connection quality (if supported) */
1945 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1946 bss_conf
->cqm_rssi_thold
)
1947 bss_info_changed
|= BSS_CHANGED_CQM
;
1949 /* Enable ARP filtering */
1950 if (bss_conf
->arp_addr_cnt
)
1951 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1953 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1955 mutex_lock(&local
->iflist_mtx
);
1956 ieee80211_recalc_ps(local
, -1);
1957 mutex_unlock(&local
->iflist_mtx
);
1959 ieee80211_recalc_smps(sdata
);
1960 ieee80211_recalc_ps_vif(sdata
);
1962 netif_carrier_on(sdata
->dev
);
1965 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1966 u16 stype
, u16 reason
, bool tx
,
1969 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1970 struct ieee80211_local
*local
= sdata
->local
;
1973 sdata_assert_lock(sdata
);
1975 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1978 if (WARN_ON(!ifmgd
->associated
))
1981 ieee80211_stop_poll(sdata
);
1983 ifmgd
->associated
= NULL
;
1984 netif_carrier_off(sdata
->dev
);
1987 * if we want to get out of ps before disassoc (why?) we have
1988 * to do it before sending disassoc, as otherwise the null-packet
1991 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1992 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1993 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1995 local
->ps_sdata
= NULL
;
1997 /* disable per-vif ps */
1998 ieee80211_recalc_ps_vif(sdata
);
2000 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
2002 ieee80211_flush_queues(local
, sdata
);
2004 /* deauthenticate/disassociate now */
2005 if (tx
|| frame_buf
)
2006 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
2007 reason
, tx
, frame_buf
);
2009 /* flush out frame */
2011 ieee80211_flush_queues(local
, sdata
);
2013 /* clear bssid only after building the needed mgmt frames */
2014 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
2016 /* remove AP and TDLS peers */
2017 sta_info_flush(sdata
);
2019 /* finally reset all BSS / config parameters */
2020 changed
|= ieee80211_reset_erp_info(sdata
);
2022 ieee80211_led_assoc(local
, 0);
2023 changed
|= BSS_CHANGED_ASSOC
;
2024 sdata
->vif
.bss_conf
.assoc
= false;
2026 ifmgd
->p2p_noa_index
= -1;
2027 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
2028 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
2030 /* on the next assoc, re-program HT/VHT parameters */
2031 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
2032 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
2033 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
2034 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
2036 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
2038 del_timer_sync(&local
->dynamic_ps_timer
);
2039 cancel_work_sync(&local
->dynamic_ps_enable_work
);
2041 /* Disable ARP filtering */
2042 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
2043 changed
|= BSS_CHANGED_ARP_FILTER
;
2045 sdata
->vif
.bss_conf
.qos
= false;
2046 changed
|= BSS_CHANGED_QOS
;
2048 /* The BSSID (not really interesting) and HT changed */
2049 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
2050 ieee80211_bss_info_change_notify(sdata
, changed
);
2052 /* disassociated - set to defaults now */
2053 ieee80211_set_wmm_default(sdata
, false);
2055 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
2056 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
2057 del_timer_sync(&sdata
->u
.mgd
.timer
);
2058 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
2060 sdata
->vif
.bss_conf
.dtim_period
= 0;
2061 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
2063 ifmgd
->have_beacon
= false;
2066 mutex_lock(&local
->mtx
);
2067 ieee80211_vif_release_channel(sdata
);
2069 sdata
->vif
.csa_active
= false;
2070 ifmgd
->csa_waiting_bcn
= false;
2071 if (sdata
->csa_block_tx
) {
2072 ieee80211_wake_vif_queues(local
, sdata
,
2073 IEEE80211_QUEUE_STOP_REASON_CSA
);
2074 sdata
->csa_block_tx
= false;
2076 mutex_unlock(&local
->mtx
);
2078 /* existing TX TSPEC sessions no longer exist */
2079 memset(ifmgd
->tx_tspec
, 0, sizeof(ifmgd
->tx_tspec
));
2080 cancel_delayed_work_sync(&ifmgd
->tx_tspec_wk
);
2082 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2085 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
2086 struct ieee80211_hdr
*hdr
)
2089 * We can postpone the mgd.timer whenever receiving unicast frames
2090 * from AP because we know that the connection is working both ways
2091 * at that time. But multicast frames (and hence also beacons) must
2092 * be ignored here, because we need to trigger the timer during
2093 * data idle periods for sending the periodic probe request to the
2094 * AP we're connected to.
2096 if (is_multicast_ether_addr(hdr
->addr1
))
2099 ieee80211_sta_reset_conn_monitor(sdata
);
2102 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
2104 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2105 struct ieee80211_local
*local
= sdata
->local
;
2107 mutex_lock(&local
->mtx
);
2108 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
2111 __ieee80211_stop_poll(sdata
);
2113 mutex_lock(&local
->iflist_mtx
);
2114 ieee80211_recalc_ps(local
, -1);
2115 mutex_unlock(&local
->iflist_mtx
);
2117 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
2121 * We've received a probe response, but are not sure whether
2122 * we have or will be receiving any beacons or data, so let's
2123 * schedule the timers again, just in case.
2125 ieee80211_sta_reset_beacon_monitor(sdata
);
2127 mod_timer(&ifmgd
->conn_mon_timer
,
2128 round_jiffies_up(jiffies
+
2129 IEEE80211_CONNECTION_IDLE_TIME
));
2131 mutex_unlock(&local
->mtx
);
2134 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data
*sdata
,
2135 struct ieee80211_hdr
*hdr
,
2138 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2139 u16 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
2140 int ac
= ieee80211_ac_from_tid(tid
);
2141 struct ieee80211_sta_tx_tspec
*tx_tspec
= &ifmgd
->tx_tspec
[ac
];
2142 unsigned long now
= jiffies
;
2144 if (likely(!tx_tspec
->admitted_time
))
2147 if (time_after(now
, tx_tspec
->time_slice_start
+ HZ
)) {
2148 tx_tspec
->consumed_tx_time
= 0;
2149 tx_tspec
->time_slice_start
= now
;
2151 if (tx_tspec
->downgraded
) {
2152 tx_tspec
->action
= TX_TSPEC_ACTION_STOP_DOWNGRADE
;
2153 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2157 if (tx_tspec
->downgraded
)
2160 tx_tspec
->consumed_tx_time
+= tx_time
;
2162 if (tx_tspec
->consumed_tx_time
>= tx_tspec
->admitted_time
) {
2163 tx_tspec
->downgraded
= true;
2164 tx_tspec
->action
= TX_TSPEC_ACTION_DOWNGRADE
;
2165 schedule_delayed_work(&ifmgd
->tx_tspec_wk
, 0);
2169 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
2170 struct ieee80211_hdr
*hdr
, bool ack
, u16 tx_time
)
2172 ieee80211_sta_tx_wmm_ac_notify(sdata
, hdr
, tx_time
);
2174 if (!ieee80211_is_data(hdr
->frame_control
))
2177 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
2178 sdata
->u
.mgd
.probe_send_count
> 0) {
2180 ieee80211_sta_reset_conn_monitor(sdata
);
2182 sdata
->u
.mgd
.nullfunc_failed
= true;
2183 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2188 ieee80211_sta_reset_conn_monitor(sdata
);
2191 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
2193 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2195 u8
*dst
= ifmgd
->associated
->bssid
;
2196 u8 unicast_limit
= max(1, max_probe_tries
- 3);
2199 * Try sending broadcast probe requests for the last three
2200 * probe requests after the first ones failed since some
2201 * buggy APs only support broadcast probe requests.
2203 if (ifmgd
->probe_send_count
>= unicast_limit
)
2207 * When the hardware reports an accurate Tx ACK status, it's
2208 * better to send a nullfunc frame instead of a probe request,
2209 * as it will kick us off the AP quickly if we aren't associated
2210 * anymore. The timeout will be reset if the frame is ACKed by
2213 ifmgd
->probe_send_count
++;
2215 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2216 ifmgd
->nullfunc_failed
= false;
2217 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
2222 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
2223 if (WARN_ON_ONCE(ssid
== NULL
))
2228 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
2229 0, (u32
) -1, true, 0,
2230 ifmgd
->associated
->channel
, false);
2234 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
2235 run_again(sdata
, ifmgd
->probe_timeout
);
2238 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
2241 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2242 bool already
= false;
2244 if (!ieee80211_sdata_running(sdata
))
2249 if (!ifmgd
->associated
)
2252 mutex_lock(&sdata
->local
->mtx
);
2254 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
2255 mutex_unlock(&sdata
->local
->mtx
);
2260 mlme_dbg_ratelimited(sdata
,
2261 "detected beacon loss from AP (missed %d beacons) - probing\n",
2264 ieee80211_cqm_rssi_notify(&sdata
->vif
,
2265 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
,
2270 * The driver/our work has already reported this event or the
2271 * connection monitoring has kicked in and we have already sent
2272 * a probe request. Or maybe the AP died and the driver keeps
2273 * reporting until we disassociate...
2275 * In either case we have to ignore the current call to this
2276 * function (except for setting the correct probe reason bit)
2277 * because otherwise we would reset the timer every time and
2278 * never check whether we received a probe response!
2280 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
2283 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
2285 mutex_unlock(&sdata
->local
->mtx
);
2290 mutex_lock(&sdata
->local
->iflist_mtx
);
2291 ieee80211_recalc_ps(sdata
->local
, -1);
2292 mutex_unlock(&sdata
->local
->iflist_mtx
);
2294 ifmgd
->probe_send_count
= 0;
2295 ieee80211_mgd_probe_ap_send(sdata
);
2297 sdata_unlock(sdata
);
2300 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
2301 struct ieee80211_vif
*vif
)
2303 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2304 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2305 struct cfg80211_bss
*cbss
;
2306 struct sk_buff
*skb
;
2310 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2313 sdata_assert_lock(sdata
);
2315 if (ifmgd
->associated
)
2316 cbss
= ifmgd
->associated
;
2317 else if (ifmgd
->auth_data
)
2318 cbss
= ifmgd
->auth_data
->bss
;
2319 else if (ifmgd
->assoc_data
)
2320 cbss
= ifmgd
->assoc_data
->bss
;
2325 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
2326 if (WARN_ON_ONCE(ssid
== NULL
))
2331 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
2332 (u32
) -1, cbss
->channel
,
2339 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
2341 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
2343 struct ieee80211_local
*local
= sdata
->local
;
2344 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2345 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2348 if (!ifmgd
->associated
) {
2349 sdata_unlock(sdata
);
2353 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
2354 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2356 mutex_lock(&local
->mtx
);
2357 sdata
->vif
.csa_active
= false;
2358 ifmgd
->csa_waiting_bcn
= false;
2359 if (sdata
->csa_block_tx
) {
2360 ieee80211_wake_vif_queues(local
, sdata
,
2361 IEEE80211_QUEUE_STOP_REASON_CSA
);
2362 sdata
->csa_block_tx
= false;
2364 mutex_unlock(&local
->mtx
);
2366 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
2367 IEEE80211_DEAUTH_FRAME_LEN
);
2368 sdata_unlock(sdata
);
2371 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
2373 struct ieee80211_sub_if_data
*sdata
=
2374 container_of(work
, struct ieee80211_sub_if_data
,
2375 u
.mgd
.beacon_connection_loss_work
);
2376 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2377 struct sta_info
*sta
;
2379 if (ifmgd
->associated
) {
2381 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2383 sta
->beacon_loss_count
++;
2387 if (ifmgd
->connection_loss
) {
2388 sdata_info(sdata
, "Connection to AP %pM lost\n",
2390 __ieee80211_disconnect(sdata
);
2392 ieee80211_mgd_probe_ap(sdata
, true);
2396 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2398 struct ieee80211_sub_if_data
*sdata
=
2399 container_of(work
, struct ieee80211_sub_if_data
,
2400 u
.mgd
.csa_connection_drop_work
);
2402 __ieee80211_disconnect(sdata
);
2405 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2407 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2408 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2410 trace_api_beacon_loss(sdata
);
2412 sdata
->u
.mgd
.connection_loss
= false;
2413 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2415 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2417 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2419 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2420 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2422 trace_api_connection_loss(sdata
);
2424 sdata
->u
.mgd
.connection_loss
= true;
2425 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2427 EXPORT_SYMBOL(ieee80211_connection_loss
);
2430 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2433 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2435 sdata_assert_lock(sdata
);
2438 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2440 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2441 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2442 sdata
->u
.mgd
.flags
= 0;
2443 mutex_lock(&sdata
->local
->mtx
);
2444 ieee80211_vif_release_channel(sdata
);
2445 mutex_unlock(&sdata
->local
->mtx
);
2448 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2450 sdata
->u
.mgd
.auth_data
= NULL
;
2453 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2454 struct ieee80211_mgmt
*mgmt
, size_t len
)
2456 struct ieee80211_local
*local
= sdata
->local
;
2457 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2459 struct ieee802_11_elems elems
;
2462 pos
= mgmt
->u
.auth
.variable
;
2463 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2464 if (!elems
.challenge
)
2466 auth_data
->expected_transaction
= 4;
2467 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2468 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2469 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2470 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2471 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2472 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2473 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2474 auth_data
->key
, auth_data
->key_len
,
2475 auth_data
->key_idx
, tx_flags
);
2478 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2479 struct ieee80211_mgmt
*mgmt
, size_t len
)
2481 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2483 u16 auth_alg
, auth_transaction
, status_code
;
2484 struct sta_info
*sta
;
2486 sdata_assert_lock(sdata
);
2491 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2494 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2496 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2499 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2500 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2501 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2503 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2504 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2505 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2506 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2508 ifmgd
->auth_data
->expected_transaction
);
2512 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2513 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2514 mgmt
->sa
, status_code
);
2515 ieee80211_destroy_auth_data(sdata
, false);
2516 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2520 switch (ifmgd
->auth_data
->algorithm
) {
2521 case WLAN_AUTH_OPEN
:
2522 case WLAN_AUTH_LEAP
:
2526 case WLAN_AUTH_SHARED_KEY
:
2527 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2528 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2529 /* need another frame */
2534 WARN_ONCE(1, "invalid auth alg %d",
2535 ifmgd
->auth_data
->algorithm
);
2539 sdata_info(sdata
, "authenticated\n");
2540 ifmgd
->auth_data
->done
= true;
2541 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2542 ifmgd
->auth_data
->timeout_started
= true;
2543 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2545 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2546 ifmgd
->auth_data
->expected_transaction
!= 2) {
2548 * Report auth frame to user space for processing since another
2549 * round of Authentication frames is still needed.
2551 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2555 /* move station state to auth */
2556 mutex_lock(&sdata
->local
->sta_mtx
);
2557 sta
= sta_info_get(sdata
, bssid
);
2559 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2562 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2563 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2566 mutex_unlock(&sdata
->local
->sta_mtx
);
2568 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2571 mutex_unlock(&sdata
->local
->sta_mtx
);
2572 /* ignore frame -- wait for timeout */
2575 #define case_WLAN(type) \
2576 case WLAN_REASON_##type: return #type
2578 static const char *ieee80211_get_reason_code_string(u16 reason_code
)
2580 switch (reason_code
) {
2581 case_WLAN(UNSPECIFIED
);
2582 case_WLAN(PREV_AUTH_NOT_VALID
);
2583 case_WLAN(DEAUTH_LEAVING
);
2584 case_WLAN(DISASSOC_DUE_TO_INACTIVITY
);
2585 case_WLAN(DISASSOC_AP_BUSY
);
2586 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA
);
2587 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA
);
2588 case_WLAN(DISASSOC_STA_HAS_LEFT
);
2589 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH
);
2590 case_WLAN(DISASSOC_BAD_POWER
);
2591 case_WLAN(DISASSOC_BAD_SUPP_CHAN
);
2592 case_WLAN(INVALID_IE
);
2593 case_WLAN(MIC_FAILURE
);
2594 case_WLAN(4WAY_HANDSHAKE_TIMEOUT
);
2595 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT
);
2596 case_WLAN(IE_DIFFERENT
);
2597 case_WLAN(INVALID_GROUP_CIPHER
);
2598 case_WLAN(INVALID_PAIRWISE_CIPHER
);
2599 case_WLAN(INVALID_AKMP
);
2600 case_WLAN(UNSUPP_RSN_VERSION
);
2601 case_WLAN(INVALID_RSN_IE_CAP
);
2602 case_WLAN(IEEE8021X_FAILED
);
2603 case_WLAN(CIPHER_SUITE_REJECTED
);
2604 case_WLAN(DISASSOC_UNSPECIFIED_QOS
);
2605 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH
);
2606 case_WLAN(DISASSOC_LOW_ACK
);
2607 case_WLAN(DISASSOC_QAP_EXCEED_TXOP
);
2608 case_WLAN(QSTA_LEAVE_QBSS
);
2609 case_WLAN(QSTA_NOT_USE
);
2610 case_WLAN(QSTA_REQUIRE_SETUP
);
2611 case_WLAN(QSTA_TIMEOUT
);
2612 case_WLAN(QSTA_CIPHER_NOT_SUPP
);
2613 case_WLAN(MESH_PEER_CANCELED
);
2614 case_WLAN(MESH_MAX_PEERS
);
2615 case_WLAN(MESH_CONFIG
);
2616 case_WLAN(MESH_CLOSE
);
2617 case_WLAN(MESH_MAX_RETRIES
);
2618 case_WLAN(MESH_CONFIRM_TIMEOUT
);
2619 case_WLAN(MESH_INVALID_GTK
);
2620 case_WLAN(MESH_INCONSISTENT_PARAM
);
2621 case_WLAN(MESH_INVALID_SECURITY
);
2622 case_WLAN(MESH_PATH_ERROR
);
2623 case_WLAN(MESH_PATH_NOFORWARD
);
2624 case_WLAN(MESH_PATH_DEST_UNREACHABLE
);
2625 case_WLAN(MAC_EXISTS_IN_MBSS
);
2626 case_WLAN(MESH_CHAN_REGULATORY
);
2627 case_WLAN(MESH_CHAN
);
2628 default: return "<unknown>";
2632 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2633 struct ieee80211_mgmt
*mgmt
, size_t len
)
2635 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2636 const u8
*bssid
= NULL
;
2639 sdata_assert_lock(sdata
);
2644 if (!ifmgd
->associated
||
2645 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2648 bssid
= ifmgd
->associated
->bssid
;
2650 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2652 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u=%s)\n",
2653 bssid
, reason_code
, ieee80211_get_reason_code_string(reason_code
));
2655 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2657 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2661 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2662 struct ieee80211_mgmt
*mgmt
, size_t len
)
2664 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2667 sdata_assert_lock(sdata
);
2672 if (!ifmgd
->associated
||
2673 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2676 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2678 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2679 mgmt
->sa
, reason_code
);
2681 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2683 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2686 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2687 u8
*supp_rates
, unsigned int supp_rates_len
,
2688 u32
*rates
, u32
*basic_rates
,
2689 bool *have_higher_than_11mbit
,
2690 int *min_rate
, int *min_rate_index
,
2691 int shift
, u32 rate_flags
)
2695 for (i
= 0; i
< supp_rates_len
; i
++) {
2696 int rate
= supp_rates
[i
] & 0x7f;
2697 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2699 if ((rate
* 5 * (1 << shift
)) > 110)
2700 *have_higher_than_11mbit
= true;
2703 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2704 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2706 * Note: Even through the membership selector and the basic
2707 * rate flag share the same bit, they are not exactly
2710 if (!!(supp_rates
[i
] & 0x80) &&
2711 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2714 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2715 struct ieee80211_rate
*br
;
2718 br
= &sband
->bitrates
[j
];
2719 if ((rate_flags
& br
->flags
) != rate_flags
)
2722 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2723 if (brate
== rate
) {
2726 *basic_rates
|= BIT(j
);
2727 if ((rate
* 5) < *min_rate
) {
2728 *min_rate
= rate
* 5;
2729 *min_rate_index
= j
;
2737 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2740 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2742 sdata_assert_lock(sdata
);
2745 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2747 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2748 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2749 sdata
->u
.mgd
.flags
= 0;
2750 mutex_lock(&sdata
->local
->mtx
);
2751 ieee80211_vif_release_channel(sdata
);
2752 mutex_unlock(&sdata
->local
->mtx
);
2756 sdata
->u
.mgd
.assoc_data
= NULL
;
2759 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2760 struct cfg80211_bss
*cbss
,
2761 struct ieee80211_mgmt
*mgmt
, size_t len
)
2763 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2764 struct ieee80211_local
*local
= sdata
->local
;
2765 struct ieee80211_supported_band
*sband
;
2766 struct sta_info
*sta
;
2768 u16 capab_info
, aid
;
2769 struct ieee802_11_elems elems
;
2770 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2771 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2772 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2777 /* AssocResp and ReassocResp have identical structure */
2779 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2780 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2782 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2783 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2785 aid
&= ~(BIT(15) | BIT(14));
2787 ifmgd
->broken_ap
= false;
2789 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2790 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2793 ifmgd
->broken_ap
= true;
2796 pos
= mgmt
->u
.assoc_resp
.variable
;
2797 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2799 if (!elems
.supp_rates
) {
2800 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2805 ifmgd
->tdls_chan_switch_prohibited
=
2806 elems
.ext_capab
&& elems
.ext_capab_len
>= 5 &&
2807 (elems
.ext_capab
[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED
);
2810 * Some APs are erroneously not including some information in their
2811 * (re)association response frames. Try to recover by using the data
2812 * from the beacon or probe response. This seems to afflict mobile
2813 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2814 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2816 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2817 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2818 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2819 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2820 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2821 const struct cfg80211_bss_ies
*ies
;
2822 struct ieee802_11_elems bss_elems
;
2825 ies
= rcu_dereference(cbss
->ies
);
2827 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2833 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2835 if (assoc_data
->wmm
&&
2836 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2837 elems
.wmm_param
= bss_elems
.wmm_param
;
2839 "AP bug: WMM param missing from AssocResp\n");
2843 * Also check if we requested HT/VHT, otherwise the AP doesn't
2844 * have to include the IEs in the (re)association response.
2846 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2847 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2848 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2850 "AP bug: HT capability missing from AssocResp\n");
2852 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2853 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2854 elems
.ht_operation
= bss_elems
.ht_operation
;
2856 "AP bug: HT operation missing from AssocResp\n");
2858 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2859 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2860 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2862 "AP bug: VHT capa missing from AssocResp\n");
2864 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2865 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2866 elems
.vht_operation
= bss_elems
.vht_operation
;
2868 "AP bug: VHT operation missing from AssocResp\n");
2873 * We previously checked these in the beacon/probe response, so
2874 * they should be present here. This is just a safety net.
2876 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2877 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2879 "HT AP is missing WMM params or HT capability/operation\n");
2884 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2885 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2887 "VHT AP is missing VHT capability/operation\n");
2892 mutex_lock(&sdata
->local
->sta_mtx
);
2894 * station info was already allocated and inserted before
2895 * the association and should be available to us
2897 sta
= sta_info_get(sdata
, cbss
->bssid
);
2898 if (WARN_ON(!sta
)) {
2899 mutex_unlock(&sdata
->local
->sta_mtx
);
2904 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2906 /* Set up internal HT/VHT capabilities */
2907 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2908 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2909 elems
.ht_cap_elem
, sta
);
2911 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2912 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2913 elems
.vht_cap_elem
, sta
);
2916 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2917 * in their association response, so ignore that data for our own
2918 * configuration. If it changed since the last beacon, we'll get the
2919 * next beacon and update then.
2923 * If an operating mode notification IE is present, override the
2924 * NSS calculation (that would be done in rate_control_rate_init())
2925 * and use the # of streams from that element.
2927 if (elems
.opmode_notif
&&
2928 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2931 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2932 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2934 sta
->sta
.rx_nss
= nss
;
2937 rate_control_rate_init(sta
);
2939 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2940 set_sta_flag(sta
, WLAN_STA_MFP
);
2942 sta
->sta
.wme
= elems
.wmm_param
;
2944 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2945 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2946 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2949 "failed to move station %pM to desired state\n",
2951 WARN_ON(__sta_info_destroy(sta
));
2952 mutex_unlock(&sdata
->local
->sta_mtx
);
2957 mutex_unlock(&sdata
->local
->sta_mtx
);
2960 * Always handle WMM once after association regardless
2961 * of the first value the AP uses. Setting -1 here has
2962 * that effect because the AP values is an unsigned
2965 ifmgd
->wmm_last_param_set
= -1;
2967 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) && elems
.wmm_param
)
2968 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2969 elems
.wmm_param_len
);
2971 ieee80211_set_wmm_default(sdata
, false);
2972 changed
|= BSS_CHANGED_QOS
;
2974 /* set AID and assoc capability,
2975 * ieee80211_set_associated() will tell the driver */
2976 bss_conf
->aid
= aid
;
2977 bss_conf
->assoc_capability
= capab_info
;
2978 ieee80211_set_associated(sdata
, cbss
, changed
);
2981 * If we're using 4-addr mode, let the AP know that we're
2982 * doing so, so that it can create the STA VLAN on its side
2984 if (ifmgd
->use_4addr
)
2985 ieee80211_send_4addr_nullfunc(local
, sdata
);
2988 * Start timer to probe the connection to the AP now.
2989 * Also start the timer that will detect beacon loss.
2991 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2992 ieee80211_sta_reset_beacon_monitor(sdata
);
3000 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
3001 struct ieee80211_mgmt
*mgmt
,
3004 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3005 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
3006 u16 capab_info
, status_code
, aid
;
3007 struct ieee802_11_elems elems
;
3008 int ac
, uapsd_queues
= -1;
3011 struct cfg80211_bss
*bss
;
3013 sdata_assert_lock(sdata
);
3017 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
3021 * AssocResp and ReassocResp have identical structure, so process both
3022 * of them in this function.
3028 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
3029 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
3030 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
3031 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
3034 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3035 reassoc
? "Rea" : "A", mgmt
->sa
,
3036 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
3038 pos
= mgmt
->u
.assoc_resp
.variable
;
3039 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
3041 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
3042 elems
.timeout_int
&&
3043 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
3045 tu
= le32_to_cpu(elems
.timeout_int
->value
);
3046 ms
= tu
* 1024 / 1000;
3048 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3050 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
3051 assoc_data
->timeout_started
= true;
3052 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
3053 run_again(sdata
, assoc_data
->timeout
);
3057 bss
= assoc_data
->bss
;
3059 if (status_code
!= WLAN_STATUS_SUCCESS
) {
3060 sdata_info(sdata
, "%pM denied association (code=%d)\n",
3061 mgmt
->sa
, status_code
);
3062 ieee80211_destroy_assoc_data(sdata
, false);
3064 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
3065 /* oops -- internal error -- send timeout for now */
3066 ieee80211_destroy_assoc_data(sdata
, false);
3067 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3070 sdata_info(sdata
, "associated\n");
3073 * destroy assoc_data afterwards, as otherwise an idle
3074 * recalc after assoc_data is NULL but before associated
3075 * is set can cause the interface to go idle
3077 ieee80211_destroy_assoc_data(sdata
, true);
3079 /* get uapsd queues configuration */
3081 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
3082 if (sdata
->tx_conf
[ac
].uapsd
)
3083 uapsd_queues
|= BIT(ac
);
3086 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
, uapsd_queues
);
3089 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
3090 struct ieee80211_mgmt
*mgmt
, size_t len
,
3091 struct ieee80211_rx_status
*rx_status
,
3092 struct ieee802_11_elems
*elems
)
3094 struct ieee80211_local
*local
= sdata
->local
;
3095 struct ieee80211_bss
*bss
;
3096 struct ieee80211_channel
*channel
;
3098 sdata_assert_lock(sdata
);
3100 channel
= ieee80211_get_channel(local
->hw
.wiphy
, rx_status
->freq
);
3104 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
3107 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
3108 ieee80211_rx_bss_put(local
, bss
);
3113 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
3114 struct sk_buff
*skb
)
3116 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
3117 struct ieee80211_if_managed
*ifmgd
;
3118 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
3119 size_t baselen
, len
= skb
->len
;
3120 struct ieee802_11_elems elems
;
3122 ifmgd
= &sdata
->u
.mgd
;
3124 sdata_assert_lock(sdata
);
3126 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
3127 return; /* ignore ProbeResp to foreign address */
3129 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
3133 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
3136 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3138 if (ifmgd
->associated
&&
3139 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3140 ieee80211_reset_ap_probe(sdata
);
3142 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
3143 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
3144 /* got probe response, continue with auth */
3145 sdata_info(sdata
, "direct probe responded\n");
3146 ifmgd
->auth_data
->tries
= 0;
3147 ifmgd
->auth_data
->timeout
= jiffies
;
3148 ifmgd
->auth_data
->timeout_started
= true;
3149 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3154 * This is the canonical list of information elements we care about,
3155 * the filter code also gives us all changes to the Microsoft OUI
3156 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3157 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3158 * changes to requested client power.
3160 * We implement beacon filtering in software since that means we can
3161 * avoid processing the frame here and in cfg80211, and userspace
3162 * will not be able to tell whether the hardware supports it or not.
3164 * XXX: This list needs to be dynamic -- userspace needs to be able to
3165 * add items it requires. It also needs to be able to tell us to
3166 * look out for other vendor IEs.
3168 static const u64 care_about_ies
=
3169 (1ULL << WLAN_EID_COUNTRY
) |
3170 (1ULL << WLAN_EID_ERP_INFO
) |
3171 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
3172 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
3173 (1ULL << WLAN_EID_HT_CAPABILITY
) |
3174 (1ULL << WLAN_EID_HT_OPERATION
);
3176 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
3177 struct ieee80211_mgmt
*mgmt
, size_t len
,
3178 struct ieee80211_rx_status
*rx_status
)
3180 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3181 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
3183 struct ieee802_11_elems elems
;
3184 struct ieee80211_local
*local
= sdata
->local
;
3185 struct ieee80211_chanctx_conf
*chanctx_conf
;
3186 struct ieee80211_channel
*chan
;
3187 struct sta_info
*sta
;
3193 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3195 sdata_assert_lock(sdata
);
3197 /* Process beacon from the current BSS */
3198 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
3203 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3204 if (!chanctx_conf
) {
3209 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
3213 chan
= chanctx_conf
->def
.chan
;
3216 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
3217 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
3218 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
3219 len
- baselen
, false, &elems
);
3221 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3222 if (elems
.tim
&& !elems
.parse_error
) {
3223 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
3224 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
3226 ifmgd
->have_beacon
= true;
3227 ifmgd
->assoc_data
->need_beacon
= false;
3228 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3229 sdata
->vif
.bss_conf
.sync_tsf
=
3230 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3231 sdata
->vif
.bss_conf
.sync_device_ts
=
3232 rx_status
->device_timestamp
;
3234 sdata
->vif
.bss_conf
.sync_dtim_count
=
3235 elems
.tim
->dtim_count
;
3237 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3239 /* continue assoc process */
3240 ifmgd
->assoc_data
->timeout
= jiffies
;
3241 ifmgd
->assoc_data
->timeout_started
= true;
3242 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3246 if (!ifmgd
->associated
||
3247 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
3249 bssid
= ifmgd
->associated
->bssid
;
3251 /* Track average RSSI from the Beacon frames of the current AP */
3252 ifmgd
->last_beacon_signal
= rx_status
->signal
;
3253 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
3254 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
3255 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
3256 ifmgd
->last_cqm_event_signal
= 0;
3257 ifmgd
->count_beacon_signal
= 1;
3258 ifmgd
->last_ave_beacon_signal
= 0;
3260 ifmgd
->ave_beacon_signal
=
3261 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
3262 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
3263 ifmgd
->ave_beacon_signal
) / 16;
3264 ifmgd
->count_beacon_signal
++;
3267 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
3268 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
3269 int sig
= ifmgd
->ave_beacon_signal
;
3270 int last_sig
= ifmgd
->last_ave_beacon_signal
;
3273 * if signal crosses either of the boundaries, invoke callback
3274 * with appropriate parameters
3276 if (sig
> ifmgd
->rssi_max_thold
&&
3277 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
3278 ifmgd
->last_ave_beacon_signal
= sig
;
3279 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
3280 } else if (sig
< ifmgd
->rssi_min_thold
&&
3281 (last_sig
>= ifmgd
->rssi_max_thold
||
3283 ifmgd
->last_ave_beacon_signal
= sig
;
3284 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
3288 if (bss_conf
->cqm_rssi_thold
&&
3289 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
3290 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
3291 int sig
= ifmgd
->ave_beacon_signal
/ 16;
3292 int last_event
= ifmgd
->last_cqm_event_signal
;
3293 int thold
= bss_conf
->cqm_rssi_thold
;
3294 int hyst
= bss_conf
->cqm_rssi_hyst
;
3296 (last_event
== 0 || sig
< last_event
- hyst
)) {
3297 ifmgd
->last_cqm_event_signal
= sig
;
3298 ieee80211_cqm_rssi_notify(
3300 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
3302 } else if (sig
> thold
&&
3303 (last_event
== 0 || sig
> last_event
+ hyst
)) {
3304 ifmgd
->last_cqm_event_signal
= sig
;
3305 ieee80211_cqm_rssi_notify(
3307 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
3312 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
3313 mlme_dbg_ratelimited(sdata
,
3314 "cancelling AP probe due to a received beacon\n");
3315 ieee80211_reset_ap_probe(sdata
);
3319 * Push the beacon loss detection into the future since
3320 * we are processing a beacon from the AP just now.
3322 ieee80211_sta_reset_beacon_monitor(sdata
);
3324 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
3325 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
3326 len
- baselen
, false, &elems
,
3327 care_about_ies
, ncrc
);
3329 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
3330 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
3334 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
3335 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
3336 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
3337 ieee80211_hw_config(local
,
3338 IEEE80211_CONF_CHANGE_PS
);
3340 ieee80211_send_nullfunc(local
, sdata
, 0);
3341 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
3342 local
->pspolling
= true;
3345 * Here is assumed that the driver will be
3346 * able to send ps-poll frame and receive a
3347 * response even though power save mode is
3348 * enabled, but some drivers might require
3349 * to disable power save here. This needs
3350 * to be investigated.
3352 ieee80211_send_pspoll(local
, sdata
);
3357 if (sdata
->vif
.p2p
) {
3358 struct ieee80211_p2p_noa_attr noa
= {};
3361 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
3363 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
3364 (u8
*) &noa
, sizeof(noa
));
3366 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
3367 /* valid noa_attr and index changed */
3368 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
3369 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
3370 changed
|= BSS_CHANGED_P2P_PS
;
3372 * make sure we update all information, the CRC
3373 * mechanism doesn't look at P2P attributes.
3375 ifmgd
->beacon_crc_valid
= false;
3377 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
3378 /* noa_attr not found and we had valid noa_attr before */
3379 sdata
->u
.mgd
.p2p_noa_index
= -1;
3380 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
3381 changed
|= BSS_CHANGED_P2P_PS
;
3382 ifmgd
->beacon_crc_valid
= false;
3386 if (ifmgd
->csa_waiting_bcn
)
3387 ieee80211_chswitch_post_beacon(sdata
);
3389 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
3391 ifmgd
->beacon_crc
= ncrc
;
3392 ifmgd
->beacon_crc_valid
= true;
3394 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
3396 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
3397 rx_status
->device_timestamp
,
3400 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
3401 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
3402 elems
.wmm_param_len
))
3403 changed
|= BSS_CHANGED_QOS
;
3406 * If we haven't had a beacon before, tell the driver about the
3407 * DTIM period (and beacon timing if desired) now.
3409 if (!ifmgd
->have_beacon
) {
3410 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3412 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
3414 bss_conf
->dtim_period
= 1;
3416 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
3417 sdata
->vif
.bss_conf
.sync_tsf
=
3418 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3419 sdata
->vif
.bss_conf
.sync_device_ts
=
3420 rx_status
->device_timestamp
;
3422 sdata
->vif
.bss_conf
.sync_dtim_count
=
3423 elems
.tim
->dtim_count
;
3425 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3428 changed
|= BSS_CHANGED_BEACON_INFO
;
3429 ifmgd
->have_beacon
= true;
3431 mutex_lock(&local
->iflist_mtx
);
3432 ieee80211_recalc_ps(local
, -1);
3433 mutex_unlock(&local
->iflist_mtx
);
3435 ieee80211_recalc_ps_vif(sdata
);
3438 if (elems
.erp_info
) {
3440 erp_value
= elems
.erp_info
[0];
3444 changed
|= ieee80211_handle_bss_capability(sdata
,
3445 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3446 erp_valid
, erp_value
);
3448 mutex_lock(&local
->sta_mtx
);
3449 sta
= sta_info_get(sdata
, bssid
);
3451 if (ieee80211_config_bw(sdata
, sta
,
3452 elems
.ht_cap_elem
, elems
.ht_operation
,
3453 elems
.vht_operation
, bssid
, &changed
)) {
3454 mutex_unlock(&local
->sta_mtx
);
3455 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3456 WLAN_REASON_DEAUTH_LEAVING
,
3458 cfg80211_tx_mlme_mgmt(sdata
->dev
, deauth_buf
,
3459 sizeof(deauth_buf
));
3463 if (sta
&& elems
.opmode_notif
)
3464 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3465 rx_status
->band
, true);
3466 mutex_unlock(&local
->sta_mtx
);
3468 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
, mgmt
,
3470 elems
.country_elem_len
,
3471 elems
.pwr_constr_elem
,
3472 elems
.cisco_dtpc_elem
);
3474 ieee80211_bss_info_change_notify(sdata
, changed
);
3477 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3478 struct sk_buff
*skb
)
3480 struct ieee80211_rx_status
*rx_status
;
3481 struct ieee80211_mgmt
*mgmt
;
3483 struct ieee802_11_elems elems
;
3486 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3487 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3488 fc
= le16_to_cpu(mgmt
->frame_control
);
3492 switch (fc
& IEEE80211_FCTL_STYPE
) {
3493 case IEEE80211_STYPE_BEACON
:
3494 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3496 case IEEE80211_STYPE_PROBE_RESP
:
3497 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3499 case IEEE80211_STYPE_AUTH
:
3500 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3502 case IEEE80211_STYPE_DEAUTH
:
3503 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3505 case IEEE80211_STYPE_DISASSOC
:
3506 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3508 case IEEE80211_STYPE_ASSOC_RESP
:
3509 case IEEE80211_STYPE_REASSOC_RESP
:
3510 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3512 case IEEE80211_STYPE_ACTION
:
3513 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3514 ies_len
= skb
->len
-
3515 offsetof(struct ieee80211_mgmt
,
3516 u
.action
.u
.chan_switch
.variable
);
3521 ieee802_11_parse_elems(
3522 mgmt
->u
.action
.u
.chan_switch
.variable
,
3523 ies_len
, true, &elems
);
3525 if (elems
.parse_error
)
3528 ieee80211_sta_process_chanswitch(sdata
,
3530 rx_status
->device_timestamp
,
3532 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3533 ies_len
= skb
->len
-
3534 offsetof(struct ieee80211_mgmt
,
3535 u
.action
.u
.ext_chan_switch
.variable
);
3540 ieee802_11_parse_elems(
3541 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3542 ies_len
, true, &elems
);
3544 if (elems
.parse_error
)
3547 /* for the handling code pretend this was also an IE */
3548 elems
.ext_chansw_ie
=
3549 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3551 ieee80211_sta_process_chanswitch(sdata
,
3553 rx_status
->device_timestamp
,
3558 sdata_unlock(sdata
);
3561 static void ieee80211_sta_timer(unsigned long data
)
3563 struct ieee80211_sub_if_data
*sdata
=
3564 (struct ieee80211_sub_if_data
*) data
;
3566 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3569 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3570 u8
*bssid
, u8 reason
, bool tx
)
3572 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3574 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3577 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3578 IEEE80211_DEAUTH_FRAME_LEN
);
3581 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3583 struct ieee80211_local
*local
= sdata
->local
;
3584 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3585 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3588 sdata_assert_lock(sdata
);
3590 if (WARN_ON_ONCE(!auth_data
))
3595 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3596 sdata_info(sdata
, "authentication with %pM timed out\n",
3597 auth_data
->bss
->bssid
);
3600 * Most likely AP is not in the range so remove the
3601 * bss struct for that AP.
3603 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3608 drv_mgd_prepare_tx(local
, sdata
);
3610 if (auth_data
->bss
->proberesp_ies
) {
3614 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3615 auth_data
->bss
->bssid
, auth_data
->tries
,
3616 IEEE80211_AUTH_MAX_TRIES
);
3618 auth_data
->expected_transaction
= 2;
3620 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3621 trans
= auth_data
->sae_trans
;
3622 status
= auth_data
->sae_status
;
3623 auth_data
->expected_transaction
= trans
;
3626 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3627 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3628 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3630 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3631 auth_data
->data
, auth_data
->data_len
,
3632 auth_data
->bss
->bssid
,
3633 auth_data
->bss
->bssid
, NULL
, 0, 0,
3638 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3639 auth_data
->bss
->bssid
, auth_data
->tries
,
3640 IEEE80211_AUTH_MAX_TRIES
);
3643 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3649 * Direct probe is sent to broadcast address as some APs
3650 * will not answer to direct packet in unassociated state.
3652 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
3653 NULL
, 0, (u32
) -1, true, 0,
3654 auth_data
->bss
->channel
, false);
3658 if (tx_flags
== 0) {
3659 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3660 auth_data
->timeout_started
= true;
3661 run_again(sdata
, auth_data
->timeout
);
3663 auth_data
->timeout
=
3664 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3665 auth_data
->timeout_started
= true;
3666 run_again(sdata
, auth_data
->timeout
);
3672 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3674 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3675 struct ieee80211_local
*local
= sdata
->local
;
3677 sdata_assert_lock(sdata
);
3679 assoc_data
->tries
++;
3680 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3681 sdata_info(sdata
, "association with %pM timed out\n",
3682 assoc_data
->bss
->bssid
);
3685 * Most likely AP is not in the range so remove the
3686 * bss struct for that AP.
3688 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3693 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3694 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3695 IEEE80211_ASSOC_MAX_TRIES
);
3696 ieee80211_send_assoc(sdata
);
3698 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3699 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3700 assoc_data
->timeout_started
= true;
3701 run_again(sdata
, assoc_data
->timeout
);
3703 assoc_data
->timeout
=
3704 round_jiffies_up(jiffies
+
3705 IEEE80211_ASSOC_TIMEOUT_LONG
);
3706 assoc_data
->timeout_started
= true;
3707 run_again(sdata
, assoc_data
->timeout
);
3713 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3714 __le16 fc
, bool acked
)
3716 struct ieee80211_local
*local
= sdata
->local
;
3718 sdata
->u
.mgd
.status_fc
= fc
;
3719 sdata
->u
.mgd
.status_acked
= acked
;
3720 sdata
->u
.mgd
.status_received
= true;
3722 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3725 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3727 struct ieee80211_local
*local
= sdata
->local
;
3728 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3732 if (ifmgd
->status_received
) {
3733 __le16 fc
= ifmgd
->status_fc
;
3734 bool status_acked
= ifmgd
->status_acked
;
3736 ifmgd
->status_received
= false;
3737 if (ifmgd
->auth_data
&&
3738 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3740 ifmgd
->auth_data
->timeout
=
3741 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3742 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3744 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3746 ifmgd
->auth_data
->timeout_started
= true;
3747 } else if (ifmgd
->assoc_data
&&
3748 (ieee80211_is_assoc_req(fc
) ||
3749 ieee80211_is_reassoc_req(fc
))) {
3751 ifmgd
->assoc_data
->timeout
=
3752 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3753 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3755 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3757 ifmgd
->assoc_data
->timeout_started
= true;
3761 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3762 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3763 if (ifmgd
->auth_data
->done
) {
3765 * ok ... we waited for assoc but userspace didn't,
3766 * so let's just kill the auth data
3768 ieee80211_destroy_auth_data(sdata
, false);
3769 } else if (ieee80211_probe_auth(sdata
)) {
3772 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3774 ieee80211_destroy_auth_data(sdata
, false);
3776 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3778 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3779 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3781 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3782 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3783 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3784 ieee80211_do_assoc(sdata
)) {
3785 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3787 ieee80211_destroy_assoc_data(sdata
, false);
3788 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3790 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3791 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3793 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3794 ifmgd
->associated
) {
3798 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3800 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3801 max_tries
= max_nullfunc_tries
;
3803 max_tries
= max_probe_tries
;
3805 /* ACK received for nullfunc probing frame */
3806 if (!ifmgd
->probe_send_count
)
3807 ieee80211_reset_ap_probe(sdata
);
3808 else if (ifmgd
->nullfunc_failed
) {
3809 if (ifmgd
->probe_send_count
< max_tries
) {
3811 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3812 bssid
, ifmgd
->probe_send_count
,
3814 ieee80211_mgd_probe_ap_send(sdata
);
3817 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3819 ieee80211_sta_connection_lost(sdata
, bssid
,
3820 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3823 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3824 run_again(sdata
, ifmgd
->probe_timeout
);
3825 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3827 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3828 bssid
, probe_wait_ms
);
3829 ieee80211_sta_connection_lost(sdata
, bssid
,
3830 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3831 } else if (ifmgd
->probe_send_count
< max_tries
) {
3833 "No probe response from AP %pM after %dms, try %d/%i\n",
3834 bssid
, probe_wait_ms
,
3835 ifmgd
->probe_send_count
, max_tries
);
3836 ieee80211_mgd_probe_ap_send(sdata
);
3839 * We actually lost the connection ... or did we?
3842 wiphy_debug(local
->hw
.wiphy
,
3843 "%s: No probe response from AP %pM"
3844 " after %dms, disconnecting.\n",
3846 bssid
, probe_wait_ms
);
3848 ieee80211_sta_connection_lost(sdata
, bssid
,
3849 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3853 sdata_unlock(sdata
);
3856 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3858 struct ieee80211_sub_if_data
*sdata
=
3859 (struct ieee80211_sub_if_data
*) data
;
3860 struct ieee80211_local
*local
= sdata
->local
;
3861 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3863 if (local
->quiescing
)
3866 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3869 sdata
->u
.mgd
.connection_loss
= false;
3870 ieee80211_queue_work(&sdata
->local
->hw
,
3871 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3874 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3876 struct ieee80211_sub_if_data
*sdata
=
3877 (struct ieee80211_sub_if_data
*) data
;
3878 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3879 struct ieee80211_local
*local
= sdata
->local
;
3881 if (local
->quiescing
)
3884 if (sdata
->vif
.csa_active
&& !ifmgd
->csa_waiting_bcn
)
3887 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3890 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3892 struct ieee80211_sub_if_data
*sdata
=
3893 container_of(work
, struct ieee80211_sub_if_data
,
3894 u
.mgd
.monitor_work
);
3896 ieee80211_mgd_probe_ap(sdata
, false);
3899 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3903 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3904 __ieee80211_stop_poll(sdata
);
3906 /* let's probe the connection once */
3907 flags
= sdata
->local
->hw
.flags
;
3908 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3909 ieee80211_queue_work(&sdata
->local
->hw
,
3910 &sdata
->u
.mgd
.monitor_work
);
3911 /* and do all the other regular work too */
3912 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3917 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data
*sdata
)
3919 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3920 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3924 if (ifmgd
->auth_data
|| ifmgd
->assoc_data
) {
3925 const u8
*bssid
= ifmgd
->auth_data
?
3926 ifmgd
->auth_data
->bss
->bssid
:
3927 ifmgd
->assoc_data
->bss
->bssid
;
3930 * If we are trying to authenticate / associate while suspending,
3931 * cfg80211 won't know and won't actually abort those attempts,
3932 * thus we need to do that ourselves.
3934 ieee80211_send_deauth_disassoc(sdata
, bssid
,
3935 IEEE80211_STYPE_DEAUTH
,
3936 WLAN_REASON_DEAUTH_LEAVING
,
3938 if (ifmgd
->assoc_data
)
3939 ieee80211_destroy_assoc_data(sdata
, false);
3940 if (ifmgd
->auth_data
)
3941 ieee80211_destroy_auth_data(sdata
, false);
3942 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3943 IEEE80211_DEAUTH_FRAME_LEN
);
3946 sdata_unlock(sdata
);
3949 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3951 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3954 if (!ifmgd
->associated
) {
3955 sdata_unlock(sdata
);
3959 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3960 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3961 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3962 ieee80211_sta_connection_lost(sdata
,
3963 ifmgd
->associated
->bssid
,
3964 WLAN_REASON_UNSPECIFIED
,
3966 sdata_unlock(sdata
);
3969 sdata_unlock(sdata
);
3973 /* interface setup */
3974 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3976 struct ieee80211_if_managed
*ifmgd
;
3978 ifmgd
= &sdata
->u
.mgd
;
3979 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3980 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3981 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3982 ieee80211_beacon_connection_loss_work
);
3983 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3984 ieee80211_csa_connection_drop_work
);
3985 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
3986 INIT_DELAYED_WORK(&ifmgd
->tdls_peer_del_work
,
3987 ieee80211_tdls_peer_del_work
);
3988 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3989 (unsigned long) sdata
);
3990 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3991 (unsigned long) sdata
);
3992 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3993 (unsigned long) sdata
);
3994 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3995 (unsigned long) sdata
);
3996 INIT_DELAYED_WORK(&ifmgd
->tx_tspec_wk
,
3997 ieee80211_sta_handle_tspec_ac_params_wk
);
4000 ifmgd
->powersave
= sdata
->wdev
.ps
;
4001 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
4002 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
4003 ifmgd
->p2p_noa_index
= -1;
4005 if (sdata
->local
->hw
.wiphy
->features
& NL80211_FEATURE_DYNAMIC_SMPS
)
4006 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
4008 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
4010 /* Setup TDLS data */
4011 spin_lock_init(&ifmgd
->teardown_lock
);
4012 ifmgd
->teardown_skb
= NULL
;
4013 ifmgd
->orig_teardown_skb
= NULL
;
4016 /* scan finished notification */
4017 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
4019 struct ieee80211_sub_if_data
*sdata
;
4021 /* Restart STA timers */
4023 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
4024 if (ieee80211_sdata_running(sdata
))
4025 ieee80211_restart_sta_timer(sdata
);
4030 int ieee80211_max_network_latency(struct notifier_block
*nb
,
4031 unsigned long data
, void *dummy
)
4033 s32 latency_usec
= (s32
) data
;
4034 struct ieee80211_local
*local
=
4035 container_of(nb
, struct ieee80211_local
,
4036 network_latency_notifier
);
4038 mutex_lock(&local
->iflist_mtx
);
4039 ieee80211_recalc_ps(local
, latency_usec
);
4040 mutex_unlock(&local
->iflist_mtx
);
4045 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
4046 struct cfg80211_bss
*cbss
)
4048 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4049 const u8
*ht_cap_ie
, *vht_cap_ie
;
4050 const struct ieee80211_ht_cap
*ht_cap
;
4051 const struct ieee80211_vht_cap
*vht_cap
;
4054 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
4057 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4058 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
4059 ht_cap
= (void *)(ht_cap_ie
+ 2);
4060 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
4062 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4063 * "Tx Unequal Modulation Supported" fields.
4067 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
4070 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4071 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
4075 vht_cap
= (void *)(vht_cap_ie
+ 2);
4076 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
4077 for (nss
= 8; nss
> 0; nss
--) {
4078 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
4079 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
4082 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4083 chains
= max(chains
, nss
);
4089 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
4090 struct cfg80211_bss
*cbss
)
4092 struct ieee80211_local
*local
= sdata
->local
;
4093 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4094 const struct ieee80211_ht_cap
*ht_cap
= NULL
;
4095 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
4096 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
4097 struct ieee80211_supported_band
*sband
;
4098 struct cfg80211_chan_def chandef
;
4101 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4103 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
4104 IEEE80211_STA_DISABLE_80P80MHZ
|
4105 IEEE80211_STA_DISABLE_160MHZ
);
4109 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
4110 sband
->ht_cap
.ht_supported
) {
4111 const u8
*ht_oper_ie
, *ht_cap_ie
;
4113 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
4114 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
4115 ht_oper
= (void *)(ht_oper_ie
+ 2);
4117 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
4118 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
))
4119 ht_cap
= (void *)(ht_cap_ie
+ 2);
4122 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4127 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
4128 sband
->vht_cap
.vht_supported
) {
4129 const u8
*vht_oper_ie
, *vht_cap
;
4131 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
4132 WLAN_EID_VHT_OPERATION
);
4133 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
4134 vht_oper
= (void *)(vht_oper_ie
+ 2);
4135 if (vht_oper
&& !ht_oper
) {
4138 "AP advertised VHT without HT, disabling both\n");
4139 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4140 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4143 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
4144 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
4145 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4150 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
4152 ht_cap
, ht_oper
, vht_oper
,
4155 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
4160 /* will change later if needed */
4161 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4163 mutex_lock(&local
->mtx
);
4165 * If this fails (possibly due to channel context sharing
4166 * on incompatible channels, e.g. 80+80 and 160 sharing the
4167 * same control channel) try to use a smaller bandwidth.
4169 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4170 IEEE80211_CHANCTX_SHARED
);
4172 /* don't downgrade for 5 and 10 MHz channels, though. */
4173 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
4174 chandef
.width
== NL80211_CHAN_WIDTH_10
)
4177 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
4178 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
4179 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
4180 IEEE80211_CHANCTX_SHARED
);
4183 mutex_unlock(&local
->mtx
);
4187 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
4188 struct cfg80211_bss
*cbss
, bool assoc
)
4190 struct ieee80211_local
*local
= sdata
->local
;
4191 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4192 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
4193 struct sta_info
*new_sta
= NULL
;
4194 bool have_sta
= false;
4197 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
4202 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
4207 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
4212 u32 rates
= 0, basic_rates
= 0;
4213 bool have_higher_than_11mbit
;
4214 int min_rate
= INT_MAX
, min_rate_index
= -1;
4215 struct ieee80211_chanctx_conf
*chanctx_conf
;
4216 struct ieee80211_supported_band
*sband
;
4217 const struct cfg80211_bss_ies
*ies
;
4221 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
4223 err
= ieee80211_prep_channel(sdata
, cbss
);
4225 sta_info_free(local
, new_sta
);
4228 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
4231 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
4232 if (WARN_ON(!chanctx_conf
)) {
4234 sta_info_free(local
, new_sta
);
4237 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
4240 ieee80211_get_rates(sband
, bss
->supp_rates
,
4241 bss
->supp_rates_len
,
4242 &rates
, &basic_rates
,
4243 &have_higher_than_11mbit
,
4244 &min_rate
, &min_rate_index
,
4248 * This used to be a workaround for basic rates missing
4249 * in the association response frame. Now that we no
4250 * longer use the basic rates from there, it probably
4251 * doesn't happen any more, but keep the workaround so
4252 * in case some *other* APs are buggy in different ways
4253 * we can connect -- with a warning.
4255 if (!basic_rates
&& min_rate_index
>= 0) {
4257 "No basic rates, using min rate instead\n");
4258 basic_rates
= BIT(min_rate_index
);
4261 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
4262 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
4264 /* cf. IEEE 802.11 9.2.12 */
4265 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
4266 have_higher_than_11mbit
)
4267 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
4269 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
4271 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
4273 /* set timing information */
4274 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
4276 ies
= rcu_dereference(cbss
->beacon_ies
);
4280 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4281 sdata
->vif
.bss_conf
.sync_device_ts
=
4282 bss
->device_ts_beacon
;
4283 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4284 ies
->data
, ies
->len
);
4285 if (tim_ie
&& tim_ie
[1] >= 2)
4286 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
4288 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4289 } else if (!(local
->hw
.flags
&
4290 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
4291 ies
= rcu_dereference(cbss
->proberesp_ies
);
4292 /* must be non-NULL since beacon IEs were NULL */
4293 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
4294 sdata
->vif
.bss_conf
.sync_device_ts
=
4295 bss
->device_ts_presp
;
4296 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4298 sdata
->vif
.bss_conf
.sync_tsf
= 0;
4299 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
4300 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
4304 /* tell driver about BSSID, basic rates and timing */
4305 ieee80211_bss_info_change_notify(sdata
,
4306 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
4307 BSS_CHANGED_BEACON_INT
);
4310 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
4312 err
= sta_info_insert(new_sta
);
4316 "failed to insert STA entry for the AP (error %d)\n",
4321 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
4327 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
4328 struct cfg80211_auth_request
*req
)
4330 struct ieee80211_local
*local
= sdata
->local
;
4331 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4332 struct ieee80211_mgd_auth_data
*auth_data
;
4336 /* prepare auth data structure */
4338 switch (req
->auth_type
) {
4339 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
4340 auth_alg
= WLAN_AUTH_OPEN
;
4342 case NL80211_AUTHTYPE_SHARED_KEY
:
4343 if (IS_ERR(local
->wep_tx_tfm
))
4345 auth_alg
= WLAN_AUTH_SHARED_KEY
;
4347 case NL80211_AUTHTYPE_FT
:
4348 auth_alg
= WLAN_AUTH_FT
;
4350 case NL80211_AUTHTYPE_NETWORK_EAP
:
4351 auth_alg
= WLAN_AUTH_LEAP
;
4353 case NL80211_AUTHTYPE_SAE
:
4354 auth_alg
= WLAN_AUTH_SAE
;
4360 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
4361 req
->ie_len
, GFP_KERNEL
);
4365 auth_data
->bss
= req
->bss
;
4367 if (req
->sae_data_len
>= 4) {
4368 __le16
*pos
= (__le16
*) req
->sae_data
;
4369 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
4370 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
4371 memcpy(auth_data
->data
, req
->sae_data
+ 4,
4372 req
->sae_data_len
- 4);
4373 auth_data
->data_len
+= req
->sae_data_len
- 4;
4376 if (req
->ie
&& req
->ie_len
) {
4377 memcpy(&auth_data
->data
[auth_data
->data_len
],
4378 req
->ie
, req
->ie_len
);
4379 auth_data
->data_len
+= req
->ie_len
;
4382 if (req
->key
&& req
->key_len
) {
4383 auth_data
->key_len
= req
->key_len
;
4384 auth_data
->key_idx
= req
->key_idx
;
4385 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
4388 auth_data
->algorithm
= auth_alg
;
4390 /* try to authenticate/probe */
4392 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
4393 ifmgd
->assoc_data
) {
4398 if (ifmgd
->auth_data
)
4399 ieee80211_destroy_auth_data(sdata
, false);
4401 /* prep auth_data so we don't go into idle on disassoc */
4402 ifmgd
->auth_data
= auth_data
;
4404 if (ifmgd
->associated
) {
4405 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4407 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4408 WLAN_REASON_UNSPECIFIED
,
4411 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4415 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
4417 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
4421 err
= ieee80211_probe_auth(sdata
);
4423 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
4427 /* hold our own reference */
4428 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
4432 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4433 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4434 ifmgd
->auth_data
= NULL
;
4440 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data
*sdata
,
4441 const u8
*wmm_param
, int len
)
4449 if (wmm_param
[5] != 1 /* version */)
4452 pos
= wmm_param
+ 8;
4455 for (; left
>= 4; left
-= 4, pos
+= 4) {
4456 u8 aifsn
= pos
[0] & 0x0f;
4457 u8 ecwmin
= pos
[1] & 0x0f;
4458 u8 ecwmax
= (pos
[1] & 0xf0) >> 4;
4459 int aci
= (pos
[0] >> 5) & 0x03;
4463 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4467 if (ecwmin
> ecwmax
) {
4469 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4470 ecwmin
, ecwmax
, aci
);
4478 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
4479 struct cfg80211_assoc_request
*req
)
4481 struct ieee80211_local
*local
= sdata
->local
;
4482 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4483 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
4484 struct ieee80211_mgd_assoc_data
*assoc_data
;
4485 const struct cfg80211_bss_ies
*beacon_ies
;
4486 struct ieee80211_supported_band
*sband
;
4487 const u8
*ssidie
, *ht_ie
, *vht_ie
;
4490 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
4495 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4501 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4502 assoc_data
->ssid_len
= ssidie
[1];
4505 if (ifmgd
->associated
) {
4506 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4508 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4509 WLAN_REASON_UNSPECIFIED
,
4512 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4516 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4521 if (ifmgd
->assoc_data
) {
4526 if (ifmgd
->auth_data
) {
4529 /* keep sta info, bssid if matching */
4530 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4531 ieee80211_destroy_auth_data(sdata
, match
);
4534 /* prepare assoc data */
4536 ifmgd
->beacon_crc_valid
= false;
4538 assoc_data
->wmm
= bss
->wmm_used
&&
4539 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4540 if (assoc_data
->wmm
) {
4541 /* try to check validity of WMM params IE */
4542 const struct cfg80211_bss_ies
*ies
;
4543 const u8
*wp
, *start
, *end
;
4546 ies
= rcu_dereference(req
->bss
->ies
);
4548 end
= start
+ ies
->len
;
4551 wp
= cfg80211_find_vendor_ie(
4553 WLAN_OUI_TYPE_MICROSOFT_WMM
,
4554 start
, end
- start
);
4557 start
= wp
+ wp
[1] + 2;
4558 /* if this IE is too short, try the next */
4561 /* if this IE is WMM params, we found what we wanted */
4566 if (!wp
|| !ieee80211_usable_wmm_params(sdata
, wp
+ 2,
4568 assoc_data
->wmm
= false;
4569 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
4575 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4576 * We still associate in non-HT mode (11a/b/g) if any one of these
4577 * ciphers is configured as pairwise.
4578 * We can set this to true for non-11n hardware, that'll be checked
4579 * separately along with the peer capabilities.
4581 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4582 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4583 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4584 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4585 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4586 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4587 netdev_info(sdata
->dev
,
4588 "disabling HT/VHT due to WEP/TKIP use\n");
4592 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4593 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4594 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4597 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4598 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4600 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4601 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4602 if (!sband
->ht_cap
.ht_supported
||
4603 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4604 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4605 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4606 if (!bss
->wmm_used
&&
4607 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4608 netdev_info(sdata
->dev
,
4609 "disabling HT as WMM/QoS is not supported by the AP\n");
4612 /* disable VHT if we don't support it or the AP doesn't use WMM */
4613 if (!sband
->vht_cap
.vht_supported
||
4614 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4615 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4616 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4617 if (!bss
->wmm_used
&&
4618 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4619 netdev_info(sdata
->dev
,
4620 "disabling VHT as WMM/QoS is not supported by the AP\n");
4623 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4624 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4625 sizeof(ifmgd
->ht_capa_mask
));
4627 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4628 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4629 sizeof(ifmgd
->vht_capa_mask
));
4631 if (req
->ie
&& req
->ie_len
) {
4632 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4633 assoc_data
->ie_len
= req
->ie_len
;
4636 assoc_data
->bss
= req
->bss
;
4638 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4639 if (ifmgd
->powersave
)
4640 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4642 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4644 sdata
->smps_mode
= ifmgd
->req_smps
;
4646 assoc_data
->capability
= req
->bss
->capability
;
4647 assoc_data
->supp_rates
= bss
->supp_rates
;
4648 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4651 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4652 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4653 assoc_data
->ap_ht_param
=
4654 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4656 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4657 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4658 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4659 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4660 sizeof(struct ieee80211_vht_cap
));
4662 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4665 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4666 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
4667 assoc_data
->uapsd
= true;
4668 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4670 assoc_data
->uapsd
= false;
4671 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4674 if (req
->prev_bssid
)
4675 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4678 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4679 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4681 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4682 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4685 if (req
->flags
& ASSOC_REQ_USE_RRM
)
4686 ifmgd
->flags
|= IEEE80211_STA_ENABLE_RRM
;
4688 ifmgd
->flags
&= ~IEEE80211_STA_ENABLE_RRM
;
4690 if (req
->crypto
.control_port
)
4691 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4693 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4695 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4696 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4697 sdata
->encrypt_headroom
= ieee80211_cs_headroom(local
, &req
->crypto
,
4700 /* kick off associate process */
4702 ifmgd
->assoc_data
= assoc_data
;
4703 ifmgd
->dtim_period
= 0;
4704 ifmgd
->have_beacon
= false;
4706 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4711 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4713 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4716 * Wait up to one beacon interval ...
4717 * should this be more if we miss one?
4719 sdata_info(sdata
, "waiting for beacon from %pM\n",
4721 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4722 assoc_data
->timeout_started
= true;
4723 assoc_data
->need_beacon
= true;
4724 } else if (beacon_ies
) {
4725 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4730 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4731 const struct ieee80211_tim_ie
*tim
;
4732 tim
= (void *)(tim_ie
+ 2);
4733 ifmgd
->dtim_period
= tim
->dtim_period
;
4734 dtim_count
= tim
->dtim_count
;
4736 ifmgd
->have_beacon
= true;
4737 assoc_data
->timeout
= jiffies
;
4738 assoc_data
->timeout_started
= true;
4740 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4741 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4742 sdata
->vif
.bss_conf
.sync_device_ts
=
4743 bss
->device_ts_beacon
;
4744 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4747 assoc_data
->timeout
= jiffies
;
4748 assoc_data
->timeout_started
= true;
4752 run_again(sdata
, assoc_data
->timeout
);
4754 if (bss
->corrupt_data
) {
4755 char *corrupt_type
= "data";
4756 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4757 if (bss
->corrupt_data
&
4758 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4759 corrupt_type
= "beacon and probe response";
4761 corrupt_type
= "beacon";
4762 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4763 corrupt_type
= "probe response";
4764 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4770 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4771 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4772 ifmgd
->assoc_data
= NULL
;
4778 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4779 struct cfg80211_deauth_request
*req
)
4781 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4782 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4783 bool tx
= !req
->local_state_change
;
4785 if (ifmgd
->auth_data
&&
4786 ether_addr_equal(ifmgd
->auth_data
->bss
->bssid
, req
->bssid
)) {
4788 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4789 req
->bssid
, req
->reason_code
,
4790 ieee80211_get_reason_code_string(req
->reason_code
));
4792 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4793 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4794 IEEE80211_STYPE_DEAUTH
,
4795 req
->reason_code
, tx
,
4797 ieee80211_destroy_auth_data(sdata
, false);
4798 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4799 IEEE80211_DEAUTH_FRAME_LEN
);
4804 if (ifmgd
->associated
&&
4805 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4807 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4808 req
->bssid
, req
->reason_code
,
4809 ieee80211_get_reason_code_string(req
->reason_code
));
4811 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4812 req
->reason_code
, tx
, frame_buf
);
4813 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4814 IEEE80211_DEAUTH_FRAME_LEN
);
4821 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4822 struct cfg80211_disassoc_request
*req
)
4824 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4826 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4829 * cfg80211 should catch this ... but it's racy since
4830 * we can receive a disassoc frame, process it, hand it
4831 * to cfg80211 while that's in a locked section already
4832 * trying to tell us that the user wants to disconnect.
4834 if (ifmgd
->associated
!= req
->bss
)
4838 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4839 req
->bss
->bssid
, req
->reason_code
, ieee80211_get_reason_code_string(req
->reason_code
));
4841 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4842 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4843 req
->reason_code
, !req
->local_state_change
,
4846 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4847 IEEE80211_DEAUTH_FRAME_LEN
);
4852 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4854 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4857 * Make sure some work items will not run after this,
4858 * they will not do anything but might not have been
4859 * cancelled when disconnecting.
4861 cancel_work_sync(&ifmgd
->monitor_work
);
4862 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4863 cancel_work_sync(&ifmgd
->request_smps_work
);
4864 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4865 cancel_work_sync(&ifmgd
->chswitch_work
);
4866 cancel_delayed_work_sync(&ifmgd
->tdls_peer_del_work
);
4869 if (ifmgd
->assoc_data
) {
4870 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
4871 ieee80211_destroy_assoc_data(sdata
, false);
4872 cfg80211_assoc_timeout(sdata
->dev
, bss
);
4874 if (ifmgd
->auth_data
)
4875 ieee80211_destroy_auth_data(sdata
, false);
4876 spin_lock_bh(&ifmgd
->teardown_lock
);
4877 if (ifmgd
->teardown_skb
) {
4878 kfree_skb(ifmgd
->teardown_skb
);
4879 ifmgd
->teardown_skb
= NULL
;
4880 ifmgd
->orig_teardown_skb
= NULL
;
4882 spin_unlock_bh(&ifmgd
->teardown_lock
);
4883 del_timer_sync(&ifmgd
->timer
);
4884 sdata_unlock(sdata
);
4887 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4888 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4891 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4893 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4895 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4897 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);