2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
43 static int max_nullfunc_tries
= 2;
44 module_param(max_nullfunc_tries
, int, 0644);
45 MODULE_PARM_DESC(max_nullfunc_tries
,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48 static int max_probe_tries
= 5;
49 module_param(max_probe_tries
, int, 0644);
50 MODULE_PARM_DESC(max_probe_tries
,
51 "Maximum probe tries before disconnecting (reason 4).");
54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
61 static int beacon_loss_count
= 7;
62 module_param(beacon_loss_count
, int, 0644);
63 MODULE_PARM_DESC(beacon_loss_count
,
64 "Number of beacon intervals before we decide beacon was lost.");
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
76 static int probe_wait_ms
= 500;
77 module_param(probe_wait_ms
, int, 0644);
78 MODULE_PARM_DESC(probe_wait_ms
,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
105 static void run_again(struct ieee80211_sub_if_data
*sdata
,
106 unsigned long timeout
)
108 sdata_assert_lock(sdata
);
110 if (!timer_pending(&sdata
->u
.mgd
.timer
) ||
111 time_before(timeout
, sdata
->u
.mgd
.timer
.expires
))
112 mod_timer(&sdata
->u
.mgd
.timer
, timeout
);
115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
117 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)
120 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
123 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
124 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
131 if (unlikely(!sdata
->u
.mgd
.associated
))
134 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
137 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
138 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
140 ifmgd
->probe_send_count
= 0;
143 static int ecw2cw(int ecw
)
145 return (1 << ecw
) - 1;
149 ieee80211_determine_chantype(struct ieee80211_sub_if_data
*sdata
,
150 struct ieee80211_supported_band
*sband
,
151 struct ieee80211_channel
*channel
,
152 const struct ieee80211_ht_operation
*ht_oper
,
153 const struct ieee80211_vht_operation
*vht_oper
,
154 struct cfg80211_chan_def
*chandef
, bool tracking
)
156 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
157 struct cfg80211_chan_def vht_chandef
;
160 chandef
->chan
= channel
;
161 chandef
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
162 chandef
->center_freq1
= channel
->center_freq
;
163 chandef
->center_freq2
= 0;
165 if (!ht_oper
|| !sband
->ht_cap
.ht_supported
) {
166 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
170 chandef
->width
= NL80211_CHAN_WIDTH_20
;
172 ht_cfreq
= ieee80211_channel_to_frequency(ht_oper
->primary_chan
,
174 /* check that channel matches the right operating channel */
175 if (!tracking
&& channel
->center_freq
!= ht_cfreq
) {
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel
->center_freq
, ht_cfreq
,
186 ht_oper
->primary_chan
, channel
->band
);
187 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
191 /* check 40 MHz support, if we have it */
192 if (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) {
193 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
195 chandef
->width
= NL80211_CHAN_WIDTH_40
;
196 chandef
->center_freq1
+= 10;
198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
199 chandef
->width
= NL80211_CHAN_WIDTH_40
;
200 chandef
->center_freq1
-= 10;
204 /* 40 MHz (and 80 MHz) must be supported for VHT */
205 ret
= IEEE80211_STA_DISABLE_VHT
;
206 /* also mark 40 MHz disabled */
207 ret
|= IEEE80211_STA_DISABLE_40MHZ
;
211 if (!vht_oper
|| !sband
->vht_cap
.vht_supported
) {
212 ret
= IEEE80211_STA_DISABLE_VHT
;
216 vht_chandef
.chan
= channel
;
217 vht_chandef
.center_freq1
=
218 ieee80211_channel_to_frequency(vht_oper
->center_freq_seg1_idx
,
220 vht_chandef
.center_freq2
= 0;
222 switch (vht_oper
->chan_width
) {
223 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
224 vht_chandef
.width
= chandef
->width
;
226 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
227 vht_chandef
.width
= NL80211_CHAN_WIDTH_80
;
229 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
230 vht_chandef
.width
= NL80211_CHAN_WIDTH_160
;
232 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
233 vht_chandef
.width
= NL80211_CHAN_WIDTH_80P80
;
234 vht_chandef
.center_freq2
=
235 ieee80211_channel_to_frequency(
236 vht_oper
->center_freq_seg2_idx
,
240 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
242 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
243 vht_oper
->chan_width
);
244 ret
= IEEE80211_STA_DISABLE_VHT
;
248 if (!cfg80211_chandef_valid(&vht_chandef
)) {
249 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
251 "AP VHT information is invalid, disable VHT\n");
252 ret
= IEEE80211_STA_DISABLE_VHT
;
256 if (cfg80211_chandef_identical(chandef
, &vht_chandef
)) {
261 if (!cfg80211_chandef_compatible(chandef
, &vht_chandef
)) {
262 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
264 "AP VHT information doesn't match HT, disable VHT\n");
265 ret
= IEEE80211_STA_DISABLE_VHT
;
269 *chandef
= vht_chandef
;
274 /* don't print the message below for VHT mismatch if VHT is disabled */
275 if (ret
& IEEE80211_STA_DISABLE_VHT
)
276 vht_chandef
= *chandef
;
279 * Ignore the DISABLED flag when we're already connected and only
280 * tracking the APs beacon for bandwidth changes - otherwise we
281 * might get disconnected here if we connect to an AP, update our
282 * regulatory information based on the AP's country IE and the
283 * information we have is wrong/outdated and disables the channel
284 * that we're actually using for the connection to the AP.
286 while (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, chandef
,
288 IEEE80211_CHAN_DISABLED
)) {
289 if (WARN_ON(chandef
->width
== NL80211_CHAN_WIDTH_20_NOHT
)) {
290 ret
= IEEE80211_STA_DISABLE_HT
|
291 IEEE80211_STA_DISABLE_VHT
;
295 ret
|= ieee80211_chandef_downgrade(chandef
);
298 if (chandef
->width
!= vht_chandef
.width
&& !tracking
)
300 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
302 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef
));
306 static int ieee80211_config_bw(struct ieee80211_sub_if_data
*sdata
,
307 struct sta_info
*sta
,
308 const struct ieee80211_ht_operation
*ht_oper
,
309 const struct ieee80211_vht_operation
*vht_oper
,
310 const u8
*bssid
, u32
*changed
)
312 struct ieee80211_local
*local
= sdata
->local
;
313 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
314 struct ieee80211_supported_band
*sband
;
315 struct ieee80211_channel
*chan
;
316 struct cfg80211_chan_def chandef
;
319 enum ieee80211_sta_rx_bandwidth new_sta_bw
;
322 /* if HT was/is disabled, don't track any bandwidth changes */
323 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
|| !ht_oper
)
326 /* don't check VHT if we associated as non-VHT station */
327 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
330 if (WARN_ON_ONCE(!sta
))
333 chan
= sdata
->vif
.bss_conf
.chandef
.chan
;
334 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
336 /* calculate new channel (type) based on HT/VHT operation IEs */
337 flags
= ieee80211_determine_chantype(sdata
, sband
, chan
, ht_oper
,
338 vht_oper
, &chandef
, true);
341 * Downgrade the new channel if we associated with restricted
342 * capabilities. For example, if we associated as a 20 MHz STA
343 * to a 40 MHz AP (due to regulatory, capabilities or config
344 * reasons) then switching to a 40 MHz channel now won't do us
345 * any good -- we couldn't use it with the AP.
347 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_80P80MHZ
&&
348 chandef
.width
== NL80211_CHAN_WIDTH_80P80
)
349 flags
|= ieee80211_chandef_downgrade(&chandef
);
350 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_160MHZ
&&
351 chandef
.width
== NL80211_CHAN_WIDTH_160
)
352 flags
|= ieee80211_chandef_downgrade(&chandef
);
353 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_40MHZ
&&
354 chandef
.width
> NL80211_CHAN_WIDTH_20
)
355 flags
|= ieee80211_chandef_downgrade(&chandef
);
357 if (cfg80211_chandef_identical(&chandef
, &sdata
->vif
.bss_conf
.chandef
))
361 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
362 ifmgd
->bssid
, chandef
.chan
->center_freq
, chandef
.width
,
363 chandef
.center_freq1
, chandef
.center_freq2
);
365 if (flags
!= (ifmgd
->flags
& (IEEE80211_STA_DISABLE_HT
|
366 IEEE80211_STA_DISABLE_VHT
|
367 IEEE80211_STA_DISABLE_40MHZ
|
368 IEEE80211_STA_DISABLE_80P80MHZ
|
369 IEEE80211_STA_DISABLE_160MHZ
)) ||
370 !cfg80211_chandef_valid(&chandef
)) {
372 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
377 switch (chandef
.width
) {
378 case NL80211_CHAN_WIDTH_20_NOHT
:
379 case NL80211_CHAN_WIDTH_20
:
380 new_sta_bw
= IEEE80211_STA_RX_BW_20
;
382 case NL80211_CHAN_WIDTH_40
:
383 new_sta_bw
= IEEE80211_STA_RX_BW_40
;
385 case NL80211_CHAN_WIDTH_80
:
386 new_sta_bw
= IEEE80211_STA_RX_BW_80
;
388 case NL80211_CHAN_WIDTH_80P80
:
389 case NL80211_CHAN_WIDTH_160
:
390 new_sta_bw
= IEEE80211_STA_RX_BW_160
;
396 if (new_sta_bw
> sta
->cur_max_bandwidth
)
397 new_sta_bw
= sta
->cur_max_bandwidth
;
399 if (new_sta_bw
< sta
->sta
.bandwidth
) {
400 sta
->sta
.bandwidth
= new_sta_bw
;
401 rate_control_rate_update(local
, sband
, sta
,
402 IEEE80211_RC_BW_CHANGED
);
405 ret
= ieee80211_vif_change_bandwidth(sdata
, &chandef
, changed
);
408 "AP %pM changed bandwidth to incompatible one - disconnect\n",
413 if (new_sta_bw
> sta
->sta
.bandwidth
) {
414 sta
->sta
.bandwidth
= new_sta_bw
;
415 rate_control_rate_update(local
, sband
, sta
,
416 IEEE80211_RC_BW_CHANGED
);
419 ht_opmode
= le16_to_cpu(ht_oper
->operation_mode
);
421 /* if bss configuration changed store the new one */
422 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
423 *changed
|= BSS_CHANGED_HT
;
424 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
430 /* frame sending functions */
432 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data
*sdata
,
433 struct sk_buff
*skb
, u8 ap_ht_param
,
434 struct ieee80211_supported_band
*sband
,
435 struct ieee80211_channel
*channel
,
436 enum ieee80211_smps_mode smps
)
439 u32 flags
= channel
->flags
;
441 struct ieee80211_sta_ht_cap ht_cap
;
443 BUILD_BUG_ON(sizeof(ht_cap
) != sizeof(sband
->ht_cap
));
445 memcpy(&ht_cap
, &sband
->ht_cap
, sizeof(ht_cap
));
446 ieee80211_apply_htcap_overrides(sdata
, &ht_cap
);
448 /* determine capability flags */
451 switch (ap_ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
452 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
453 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
454 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
455 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
458 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
459 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
460 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
461 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
467 * If 40 MHz was disabled associate as though we weren't
468 * capable of 40 MHz -- some broken APs will never fall
469 * back to trying to transmit in 20 MHz.
471 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_40MHZ
) {
472 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
473 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
476 /* set SM PS mode properly */
477 cap
&= ~IEEE80211_HT_CAP_SM_PS
;
479 case IEEE80211_SMPS_AUTOMATIC
:
480 case IEEE80211_SMPS_NUM_MODES
:
482 case IEEE80211_SMPS_OFF
:
483 cap
|= WLAN_HT_CAP_SM_PS_DISABLED
<<
484 IEEE80211_HT_CAP_SM_PS_SHIFT
;
486 case IEEE80211_SMPS_STATIC
:
487 cap
|= WLAN_HT_CAP_SM_PS_STATIC
<<
488 IEEE80211_HT_CAP_SM_PS_SHIFT
;
490 case IEEE80211_SMPS_DYNAMIC
:
491 cap
|= WLAN_HT_CAP_SM_PS_DYNAMIC
<<
492 IEEE80211_HT_CAP_SM_PS_SHIFT
;
496 /* reserve and fill IE */
497 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
) + 2);
498 ieee80211_ie_build_ht_cap(pos
, &ht_cap
, cap
);
501 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data
*sdata
,
503 struct ieee80211_supported_band
*sband
,
504 struct ieee80211_vht_cap
*ap_vht_cap
)
508 struct ieee80211_sta_vht_cap vht_cap
;
510 BUILD_BUG_ON(sizeof(vht_cap
) != sizeof(sband
->vht_cap
));
512 memcpy(&vht_cap
, &sband
->vht_cap
, sizeof(vht_cap
));
513 ieee80211_apply_vhtcap_overrides(sdata
, &vht_cap
);
515 /* determine capability flags */
518 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_80P80MHZ
) {
519 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ
;
520 cap
|= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
523 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_DISABLE_160MHZ
) {
524 cap
&= ~IEEE80211_VHT_CAP_SHORT_GI_160
;
525 cap
&= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ
;
529 * Some APs apparently get confused if our capabilities are better
530 * than theirs, so restrict what we advertise in the assoc request.
532 if (!(ap_vht_cap
->vht_cap_info
&
533 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE
)))
534 cap
&= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE
;
536 /* reserve and fill IE */
537 pos
= skb_put(skb
, sizeof(struct ieee80211_vht_cap
) + 2);
538 ieee80211_ie_build_vht_cap(pos
, &vht_cap
, cap
);
541 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
543 struct ieee80211_local
*local
= sdata
->local
;
544 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
545 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
547 struct ieee80211_mgmt
*mgmt
;
549 size_t offset
= 0, noffset
;
550 int i
, count
, rates_len
, supp_rates_len
, shift
;
552 struct ieee80211_supported_band
*sband
;
553 struct ieee80211_chanctx_conf
*chanctx_conf
;
554 struct ieee80211_channel
*chan
;
555 u32 rate_flags
, rates
= 0;
557 sdata_assert_lock(sdata
);
560 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
561 if (WARN_ON(!chanctx_conf
)) {
565 chan
= chanctx_conf
->def
.chan
;
566 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
568 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
569 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
571 if (assoc_data
->supp_rates_len
) {
573 * Get all rates supported by the device and the AP as
574 * some APs don't like getting a superset of their rates
575 * in the association request (e.g. D-Link DAP 1353 in
578 rates_len
= ieee80211_parse_bitrates(&chanctx_conf
->def
, sband
,
579 assoc_data
->supp_rates
,
580 assoc_data
->supp_rates_len
,
584 * In case AP not provide any supported rates information
585 * before association, we send information element(s) with
586 * all rates that we support.
589 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
590 if ((rate_flags
& sband
->bitrates
[i
].flags
)
598 skb
= alloc_skb(local
->hw
.extra_tx_headroom
+
599 sizeof(*mgmt
) + /* bit too much but doesn't matter */
600 2 + assoc_data
->ssid_len
+ /* SSID */
601 4 + rates_len
+ /* (extended) rates */
602 4 + /* power capability */
603 2 + 2 * sband
->n_channels
+ /* supported channels */
604 2 + sizeof(struct ieee80211_ht_cap
) + /* HT */
605 2 + sizeof(struct ieee80211_vht_cap
) + /* VHT */
606 assoc_data
->ie_len
+ /* extra IEs */
612 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
614 capab
= WLAN_CAPABILITY_ESS
;
616 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
617 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
618 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
619 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
620 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
623 if (assoc_data
->capability
& WLAN_CAPABILITY_PRIVACY
)
624 capab
|= WLAN_CAPABILITY_PRIVACY
;
626 if ((assoc_data
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
627 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
628 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
630 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
632 memcpy(mgmt
->da
, assoc_data
->bss
->bssid
, ETH_ALEN
);
633 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
634 memcpy(mgmt
->bssid
, assoc_data
->bss
->bssid
, ETH_ALEN
);
636 if (!is_zero_ether_addr(assoc_data
->prev_bssid
)) {
638 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
639 IEEE80211_STYPE_REASSOC_REQ
);
640 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
641 mgmt
->u
.reassoc_req
.listen_interval
=
642 cpu_to_le16(local
->hw
.conf
.listen_interval
);
643 memcpy(mgmt
->u
.reassoc_req
.current_ap
, assoc_data
->prev_bssid
,
647 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
648 IEEE80211_STYPE_ASSOC_REQ
);
649 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
650 mgmt
->u
.assoc_req
.listen_interval
=
651 cpu_to_le16(local
->hw
.conf
.listen_interval
);
655 pos
= skb_put(skb
, 2 + assoc_data
->ssid_len
);
656 *pos
++ = WLAN_EID_SSID
;
657 *pos
++ = assoc_data
->ssid_len
;
658 memcpy(pos
, assoc_data
->ssid
, assoc_data
->ssid_len
);
660 /* add all rates which were marked to be used above */
661 supp_rates_len
= rates_len
;
662 if (supp_rates_len
> 8)
665 pos
= skb_put(skb
, supp_rates_len
+ 2);
666 *pos
++ = WLAN_EID_SUPP_RATES
;
667 *pos
++ = supp_rates_len
;
670 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
671 if (BIT(i
) & rates
) {
672 int rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
680 if (rates_len
> count
) {
681 pos
= skb_put(skb
, rates_len
- count
+ 2);
682 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
683 *pos
++ = rates_len
- count
;
685 for (i
++; i
< sband
->n_bitrates
; i
++) {
686 if (BIT(i
) & rates
) {
688 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
695 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
696 /* 1. power capabilities */
697 pos
= skb_put(skb
, 4);
698 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
700 *pos
++ = 0; /* min tx power */
702 *pos
++ = ieee80211_chandef_max_power(&chanctx_conf
->def
);
704 /* 2. supported channels */
705 /* TODO: get this in reg domain format */
706 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
707 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
708 *pos
++ = 2 * sband
->n_channels
;
709 for (i
= 0; i
< sband
->n_channels
; i
++) {
710 *pos
++ = ieee80211_frequency_to_channel(
711 sband
->channels
[i
].center_freq
);
712 *pos
++ = 1; /* one channel in the subband*/
716 /* if present, add any custom IEs that go before HT */
717 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
718 static const u8 before_ht
[] = {
721 WLAN_EID_EXT_SUPP_RATES
,
722 WLAN_EID_PWR_CAPABILITY
,
723 WLAN_EID_SUPPORTED_CHANNELS
,
726 WLAN_EID_RRM_ENABLED_CAPABILITIES
,
727 WLAN_EID_MOBILITY_DOMAIN
,
728 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
730 noffset
= ieee80211_ie_split(assoc_data
->ie
, assoc_data
->ie_len
,
731 before_ht
, ARRAY_SIZE(before_ht
),
733 pos
= skb_put(skb
, noffset
- offset
);
734 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
738 if (WARN_ON_ONCE((ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
739 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)))
740 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
742 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
743 ieee80211_add_ht_ie(sdata
, skb
, assoc_data
->ap_ht_param
,
744 sband
, chan
, sdata
->smps_mode
);
746 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
747 ieee80211_add_vht_ie(sdata
, skb
, sband
,
748 &assoc_data
->ap_vht_cap
);
750 /* if present, add any custom non-vendor IEs that go after HT */
751 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
752 noffset
= ieee80211_ie_split_vendor(assoc_data
->ie
,
755 pos
= skb_put(skb
, noffset
- offset
);
756 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
760 if (assoc_data
->wmm
) {
761 if (assoc_data
->uapsd
) {
762 qos_info
= ifmgd
->uapsd_queues
;
763 qos_info
|= (ifmgd
->uapsd_max_sp_len
<<
764 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT
);
769 pos
= skb_put(skb
, 9);
770 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
771 *pos
++ = 7; /* len */
772 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
775 *pos
++ = 2; /* WME */
776 *pos
++ = 0; /* WME info */
777 *pos
++ = 1; /* WME ver */
781 /* add any remaining custom (i.e. vendor specific here) IEs */
782 if (assoc_data
->ie_len
&& assoc_data
->ie
) {
783 noffset
= assoc_data
->ie_len
;
784 pos
= skb_put(skb
, noffset
- offset
);
785 memcpy(pos
, assoc_data
->ie
+ offset
, noffset
- offset
);
788 drv_mgd_prepare_tx(local
, sdata
);
790 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
791 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
792 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
|
793 IEEE80211_TX_INTFL_MLME_CONN_TX
;
794 ieee80211_tx_skb(sdata
, skb
);
797 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
798 struct ieee80211_sub_if_data
*sdata
)
800 struct ieee80211_pspoll
*pspoll
;
803 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
807 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
808 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
810 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
811 ieee80211_tx_skb(sdata
, skb
);
814 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
815 struct ieee80211_sub_if_data
*sdata
,
819 struct ieee80211_hdr_3addr
*nullfunc
;
820 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
822 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
826 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
828 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
830 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
831 IEEE80211_TX_INTFL_OFFCHAN_TX_OK
;
833 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
834 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_REQ_TX_STATUS
;
836 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
837 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
839 ieee80211_tx_skb(sdata
, skb
);
842 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
843 struct ieee80211_sub_if_data
*sdata
)
846 struct ieee80211_hdr
*nullfunc
;
849 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
852 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
856 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
858 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
859 memset(nullfunc
, 0, 30);
860 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
861 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
862 nullfunc
->frame_control
= fc
;
863 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
864 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
865 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
866 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
868 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
869 ieee80211_tx_skb(sdata
, skb
);
872 /* spectrum management related things */
873 static void ieee80211_chswitch_work(struct work_struct
*work
)
875 struct ieee80211_sub_if_data
*sdata
=
876 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
877 struct ieee80211_local
*local
= sdata
->local
;
878 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
882 if (!ieee80211_sdata_running(sdata
))
886 if (!ifmgd
->associated
)
889 ret
= ieee80211_vif_change_channel(sdata
, &local
->csa_chandef
,
893 "vif channel switch failed, disconnecting\n");
894 ieee80211_queue_work(&sdata
->local
->hw
,
895 &ifmgd
->csa_connection_drop_work
);
899 if (!local
->use_chanctx
) {
900 local
->_oper_chandef
= local
->csa_chandef
;
901 /* Call "hw_config" only if doing sw channel switch.
902 * Otherwise update the channel directly
904 if (!local
->ops
->channel_switch
)
905 ieee80211_hw_config(local
, 0);
907 local
->hw
.conf
.chandef
= local
->_oper_chandef
;
910 /* XXX: shouldn't really modify cfg80211-owned data! */
911 ifmgd
->associated
->channel
= local
->csa_chandef
.chan
;
913 /* XXX: wait for a beacon first? */
914 ieee80211_wake_queues_by_reason(&local
->hw
,
915 IEEE80211_MAX_QUEUE_MAP
,
916 IEEE80211_QUEUE_STOP_REASON_CSA
);
918 ieee80211_bss_info_change_notify(sdata
, changed
);
921 sdata
->vif
.csa_active
= false;
922 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
926 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
928 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
929 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
931 trace_api_chswitch_done(sdata
, success
);
934 "driver channel switch failed, disconnecting\n");
935 ieee80211_queue_work(&sdata
->local
->hw
,
936 &ifmgd
->csa_connection_drop_work
);
938 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
941 EXPORT_SYMBOL(ieee80211_chswitch_done
);
943 static void ieee80211_chswitch_timer(unsigned long data
)
945 struct ieee80211_sub_if_data
*sdata
=
946 (struct ieee80211_sub_if_data
*) data
;
948 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.chswitch_work
);
952 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
953 u64 timestamp
, struct ieee802_11_elems
*elems
,
956 struct ieee80211_local
*local
= sdata
->local
;
957 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
958 struct cfg80211_bss
*cbss
= ifmgd
->associated
;
959 struct ieee80211_chanctx
*chanctx
;
960 enum ieee80211_band current_band
;
961 struct ieee80211_csa_ie csa_ie
;
964 sdata_assert_lock(sdata
);
972 /* disregard subsequent announcements if we are already processing */
973 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
976 current_band
= cbss
->channel
->band
;
977 memset(&csa_ie
, 0, sizeof(csa_ie
));
978 res
= ieee80211_parse_ch_switch_ie(sdata
, elems
, beacon
, current_band
,
980 ifmgd
->associated
->bssid
, &csa_ie
);
982 ieee80211_queue_work(&local
->hw
,
983 &ifmgd
->csa_connection_drop_work
);
987 if (!cfg80211_chandef_usable(local
->hw
.wiphy
, &csa_ie
.chandef
,
988 IEEE80211_CHAN_DISABLED
)) {
990 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
991 ifmgd
->associated
->bssid
,
992 csa_ie
.chandef
.chan
->center_freq
,
993 csa_ie
.chandef
.width
, csa_ie
.chandef
.center_freq1
,
994 csa_ie
.chandef
.center_freq2
);
995 ieee80211_queue_work(&local
->hw
,
996 &ifmgd
->csa_connection_drop_work
);
1000 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
1001 sdata
->vif
.csa_active
= true;
1003 mutex_lock(&local
->chanctx_mtx
);
1004 if (local
->use_chanctx
) {
1005 u32 num_chanctx
= 0;
1006 list_for_each_entry(chanctx
, &local
->chanctx_list
, list
)
1009 if (num_chanctx
> 1 ||
1010 !(local
->hw
.flags
& IEEE80211_HW_CHANCTX_STA_CSA
)) {
1012 "not handling chan-switch with channel contexts\n");
1013 ieee80211_queue_work(&local
->hw
,
1014 &ifmgd
->csa_connection_drop_work
);
1015 mutex_unlock(&local
->chanctx_mtx
);
1020 if (WARN_ON(!rcu_access_pointer(sdata
->vif
.chanctx_conf
))) {
1021 ieee80211_queue_work(&local
->hw
,
1022 &ifmgd
->csa_connection_drop_work
);
1023 mutex_unlock(&local
->chanctx_mtx
);
1026 chanctx
= container_of(rcu_access_pointer(sdata
->vif
.chanctx_conf
),
1027 struct ieee80211_chanctx
, conf
);
1028 if (chanctx
->refcount
> 1) {
1030 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1031 ieee80211_queue_work(&local
->hw
,
1032 &ifmgd
->csa_connection_drop_work
);
1033 mutex_unlock(&local
->chanctx_mtx
);
1036 mutex_unlock(&local
->chanctx_mtx
);
1038 local
->csa_chandef
= csa_ie
.chandef
;
1041 ieee80211_stop_queues_by_reason(&local
->hw
,
1042 IEEE80211_MAX_QUEUE_MAP
,
1043 IEEE80211_QUEUE_STOP_REASON_CSA
);
1045 if (local
->ops
->channel_switch
) {
1046 /* use driver's channel switch callback */
1047 struct ieee80211_channel_switch ch_switch
= {
1048 .timestamp
= timestamp
,
1049 .block_tx
= csa_ie
.mode
,
1050 .chandef
= csa_ie
.chandef
,
1051 .count
= csa_ie
.count
,
1054 drv_channel_switch(local
, &ch_switch
);
1058 /* channel switch handled in software */
1059 if (csa_ie
.count
<= 1)
1060 ieee80211_queue_work(&local
->hw
, &ifmgd
->chswitch_work
);
1062 mod_timer(&ifmgd
->chswitch_timer
,
1063 TU_TO_EXP_TIME(csa_ie
.count
* cbss
->beacon_interval
));
1066 static u32
ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
1067 struct ieee80211_channel
*channel
,
1068 const u8
*country_ie
, u8 country_ie_len
,
1069 const u8
*pwr_constr_elem
)
1071 struct ieee80211_country_ie_triplet
*triplet
;
1072 int chan
= ieee80211_frequency_to_channel(channel
->center_freq
);
1073 int i
, chan_pwr
, chan_increment
, new_ap_level
;
1074 bool have_chan_pwr
= false;
1077 if (country_ie_len
% 2 || country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1080 triplet
= (void *)(country_ie
+ 3);
1081 country_ie_len
-= 3;
1083 switch (channel
->band
) {
1087 case IEEE80211_BAND_2GHZ
:
1088 case IEEE80211_BAND_60GHZ
:
1091 case IEEE80211_BAND_5GHZ
:
1097 while (country_ie_len
>= 3) {
1098 u8 first_channel
= triplet
->chans
.first_channel
;
1100 if (first_channel
>= IEEE80211_COUNTRY_EXTENSION_ID
)
1103 for (i
= 0; i
< triplet
->chans
.num_channels
; i
++) {
1104 if (first_channel
+ i
* chan_increment
== chan
) {
1105 have_chan_pwr
= true;
1106 chan_pwr
= triplet
->chans
.max_power
;
1115 country_ie_len
-= 3;
1121 new_ap_level
= max_t(int, 0, chan_pwr
- *pwr_constr_elem
);
1123 if (sdata
->ap_power_level
== new_ap_level
)
1127 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1128 new_ap_level
, chan_pwr
, *pwr_constr_elem
,
1129 sdata
->u
.mgd
.bssid
);
1130 sdata
->ap_power_level
= new_ap_level
;
1131 if (__ieee80211_recalc_txpower(sdata
))
1132 return BSS_CHANGED_TXPOWER
;
1137 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
1138 struct ieee80211_sub_if_data
*sdata
)
1140 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1143 * If we are scanning right now then the parameters will
1144 * take effect when scan finishes.
1146 if (local
->scanning
)
1149 if (conf
->dynamic_ps_timeout
> 0 &&
1150 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
1151 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1152 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
1154 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1155 ieee80211_send_nullfunc(local
, sdata
, 1);
1157 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1158 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
1161 conf
->flags
|= IEEE80211_CONF_PS
;
1162 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1166 static void ieee80211_change_ps(struct ieee80211_local
*local
)
1168 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1170 if (local
->ps_sdata
) {
1171 ieee80211_enable_ps(local
, local
->ps_sdata
);
1172 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
1173 conf
->flags
&= ~IEEE80211_CONF_PS
;
1174 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1175 del_timer_sync(&local
->dynamic_ps_timer
);
1176 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1180 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
1182 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
1183 struct sta_info
*sta
= NULL
;
1184 bool authorized
= false;
1186 if (!mgd
->powersave
)
1192 if (!mgd
->associated
)
1195 if (mgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1198 if (!mgd
->have_beacon
)
1202 sta
= sta_info_get(sdata
, mgd
->bssid
);
1204 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1210 /* need to hold RTNL or interface lock */
1211 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
1213 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
1217 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
1218 local
->ps_sdata
= NULL
;
1222 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1223 if (!ieee80211_sdata_running(sdata
))
1225 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1226 /* If an AP vif is found, then disable PS
1227 * by setting the count to zero thereby setting
1233 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1239 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
1243 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
1245 beaconint_us
= ieee80211_tu_to_usec(
1246 found
->vif
.bss_conf
.beacon_int
);
1248 timeout
= local
->dynamic_ps_forced_timeout
;
1251 * Go to full PSM if the user configures a very low
1252 * latency requirement.
1253 * The 2000 second value is there for compatibility
1254 * until the PM_QOS_NETWORK_LATENCY is configured
1257 if (latency
> (1900 * USEC_PER_MSEC
) &&
1258 latency
!= (2000 * USEC_PER_SEC
))
1263 local
->hw
.conf
.dynamic_ps_timeout
= timeout
;
1265 if (beaconint_us
> latency
) {
1266 local
->ps_sdata
= NULL
;
1269 u8 dtimper
= found
->u
.mgd
.dtim_period
;
1271 /* If the TIM IE is invalid, pretend the value is 1 */
1274 else if (dtimper
> 1)
1275 maxslp
= min_t(int, dtimper
,
1276 latency
/ beaconint_us
);
1278 local
->hw
.conf
.max_sleep_period
= maxslp
;
1279 local
->hw
.conf
.ps_dtim_period
= dtimper
;
1280 local
->ps_sdata
= found
;
1283 local
->ps_sdata
= NULL
;
1286 ieee80211_change_ps(local
);
1289 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data
*sdata
)
1291 bool ps_allowed
= ieee80211_powersave_allowed(sdata
);
1293 if (sdata
->vif
.bss_conf
.ps
!= ps_allowed
) {
1294 sdata
->vif
.bss_conf
.ps
= ps_allowed
;
1295 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_PS
);
1299 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
1301 struct ieee80211_local
*local
=
1302 container_of(work
, struct ieee80211_local
,
1303 dynamic_ps_disable_work
);
1305 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1306 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1307 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1310 ieee80211_wake_queues_by_reason(&local
->hw
,
1311 IEEE80211_MAX_QUEUE_MAP
,
1312 IEEE80211_QUEUE_STOP_REASON_PS
);
1315 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
1317 struct ieee80211_local
*local
=
1318 container_of(work
, struct ieee80211_local
,
1319 dynamic_ps_enable_work
);
1320 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
1321 struct ieee80211_if_managed
*ifmgd
;
1322 unsigned long flags
;
1325 /* can only happen when PS was just disabled anyway */
1329 ifmgd
= &sdata
->u
.mgd
;
1331 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
1334 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1335 /* don't enter PS if TX frames are pending */
1336 if (drv_tx_frames_pending(local
)) {
1337 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1339 local
->hw
.conf
.dynamic_ps_timeout
));
1344 * transmission can be stopped by others which leads to
1345 * dynamic_ps_timer expiry. Postpone the ps timer if it
1346 * is not the actual idle state.
1348 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
1349 for (q
= 0; q
< local
->hw
.queues
; q
++) {
1350 if (local
->queue_stop_reasons
[q
]) {
1351 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
1353 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1355 local
->hw
.conf
.dynamic_ps_timeout
));
1359 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
1362 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
1363 !(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1364 if (drv_tx_frames_pending(local
)) {
1365 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
1367 local
->hw
.conf
.dynamic_ps_timeout
));
1369 ieee80211_send_nullfunc(local
, sdata
, 1);
1370 /* Flush to get the tx status of nullfunc frame */
1371 ieee80211_flush_queues(local
, sdata
);
1375 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
1376 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
1377 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
1378 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1379 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
1380 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1384 void ieee80211_dynamic_ps_timer(unsigned long data
)
1386 struct ieee80211_local
*local
= (void *) data
;
1388 if (local
->quiescing
|| local
->suspended
)
1391 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
1394 void ieee80211_dfs_cac_timer_work(struct work_struct
*work
)
1396 struct delayed_work
*delayed_work
=
1397 container_of(work
, struct delayed_work
, work
);
1398 struct ieee80211_sub_if_data
*sdata
=
1399 container_of(delayed_work
, struct ieee80211_sub_if_data
,
1400 dfs_cac_timer_work
);
1402 ieee80211_vif_release_channel(sdata
);
1404 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_FINISHED
, GFP_KERNEL
);
1408 static bool ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
1409 struct ieee80211_sub_if_data
*sdata
,
1410 const u8
*wmm_param
, size_t wmm_param_len
)
1412 struct ieee80211_tx_queue_params params
;
1413 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1417 u8 uapsd_queues
= 0;
1419 if (!local
->ops
->conf_tx
)
1422 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1428 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
1431 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
1432 uapsd_queues
= ifmgd
->uapsd_queues
;
1434 count
= wmm_param
[6] & 0x0f;
1435 if (count
== ifmgd
->wmm_last_param_set
)
1437 ifmgd
->wmm_last_param_set
= count
;
1439 pos
= wmm_param
+ 8;
1440 left
= wmm_param_len
- 8;
1442 memset(¶ms
, 0, sizeof(params
));
1445 for (; left
>= 4; left
-= 4, pos
+= 4) {
1446 int aci
= (pos
[0] >> 5) & 0x03;
1447 int acm
= (pos
[0] >> 4) & 0x01;
1455 sdata
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
1456 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
1462 sdata
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
1463 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
1469 sdata
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
1470 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
1477 sdata
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
1478 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
1483 params
.aifs
= pos
[0] & 0x0f;
1484 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
1485 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
1486 params
.txop
= get_unaligned_le16(pos
+ 2);
1488 params
.uapsd
= uapsd
;
1491 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1493 params
.aifs
, params
.cw_min
, params
.cw_max
,
1494 params
.txop
, params
.uapsd
);
1495 sdata
->tx_conf
[queue
] = params
;
1496 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
1498 "failed to set TX queue parameters for queue %d\n",
1502 /* enable WMM or activate new settings */
1503 sdata
->vif
.bss_conf
.qos
= true;
1507 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1509 lockdep_assert_held(&sdata
->local
->mtx
);
1511 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_CONNECTION_POLL
;
1512 ieee80211_run_deferred_scan(sdata
->local
);
1515 static void ieee80211_stop_poll(struct ieee80211_sub_if_data
*sdata
)
1517 mutex_lock(&sdata
->local
->mtx
);
1518 __ieee80211_stop_poll(sdata
);
1519 mutex_unlock(&sdata
->local
->mtx
);
1522 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
1523 u16 capab
, bool erp_valid
, u8 erp
)
1525 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1527 bool use_protection
;
1528 bool use_short_preamble
;
1529 bool use_short_slot
;
1532 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
1533 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
1535 use_protection
= false;
1536 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
1539 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
1540 if (ieee80211_get_sdata_band(sdata
) == IEEE80211_BAND_5GHZ
)
1541 use_short_slot
= true;
1543 if (use_protection
!= bss_conf
->use_cts_prot
) {
1544 bss_conf
->use_cts_prot
= use_protection
;
1545 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
1548 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
1549 bss_conf
->use_short_preamble
= use_short_preamble
;
1550 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
1553 if (use_short_slot
!= bss_conf
->use_short_slot
) {
1554 bss_conf
->use_short_slot
= use_short_slot
;
1555 changed
|= BSS_CHANGED_ERP_SLOT
;
1561 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
1562 struct cfg80211_bss
*cbss
,
1563 u32 bss_info_changed
)
1565 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1566 struct ieee80211_local
*local
= sdata
->local
;
1567 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1569 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1570 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1571 bss_conf
->assoc_capability
, bss
->has_erp_value
, bss
->erp_value
);
1573 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1574 beacon_loss_count
* bss_conf
->beacon_int
));
1576 sdata
->u
.mgd
.associated
= cbss
;
1577 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1579 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1581 if (sdata
->vif
.p2p
) {
1582 const struct cfg80211_bss_ies
*ies
;
1585 ies
= rcu_dereference(cbss
->ies
);
1589 ret
= cfg80211_get_p2p_attr(
1590 ies
->data
, ies
->len
,
1591 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
1592 (u8
*) &bss_conf
->p2p_noa_attr
,
1593 sizeof(bss_conf
->p2p_noa_attr
));
1595 sdata
->u
.mgd
.p2p_noa_index
=
1596 bss_conf
->p2p_noa_attr
.index
;
1597 bss_info_changed
|= BSS_CHANGED_P2P_PS
;
1603 /* just to be sure */
1604 ieee80211_stop_poll(sdata
);
1606 ieee80211_led_assoc(local
, 1);
1608 if (sdata
->u
.mgd
.have_beacon
) {
1610 * If the AP is buggy we may get here with no DTIM period
1611 * known, so assume it's 1 which is the only safe assumption
1612 * in that case, although if the TIM IE is broken powersave
1613 * probably just won't work at all.
1615 bss_conf
->dtim_period
= sdata
->u
.mgd
.dtim_period
?: 1;
1616 bss_conf
->beacon_rate
= bss
->beacon_rate
;
1617 bss_info_changed
|= BSS_CHANGED_BEACON_INFO
;
1619 bss_conf
->beacon_rate
= NULL
;
1620 bss_conf
->dtim_period
= 0;
1623 bss_conf
->assoc
= 1;
1625 /* Tell the driver to monitor connection quality (if supported) */
1626 if (sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
&&
1627 bss_conf
->cqm_rssi_thold
)
1628 bss_info_changed
|= BSS_CHANGED_CQM
;
1630 /* Enable ARP filtering */
1631 if (bss_conf
->arp_addr_cnt
)
1632 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1634 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1636 mutex_lock(&local
->iflist_mtx
);
1637 ieee80211_recalc_ps(local
, -1);
1638 mutex_unlock(&local
->iflist_mtx
);
1640 ieee80211_recalc_smps(sdata
);
1641 ieee80211_recalc_ps_vif(sdata
);
1643 netif_carrier_on(sdata
->dev
);
1646 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1647 u16 stype
, u16 reason
, bool tx
,
1650 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1651 struct ieee80211_local
*local
= sdata
->local
;
1654 sdata_assert_lock(sdata
);
1656 if (WARN_ON_ONCE(tx
&& !frame_buf
))
1659 if (WARN_ON(!ifmgd
->associated
))
1662 ieee80211_stop_poll(sdata
);
1664 ifmgd
->associated
= NULL
;
1665 netif_carrier_off(sdata
->dev
);
1668 * if we want to get out of ps before disassoc (why?) we have
1669 * to do it before sending disassoc, as otherwise the null-packet
1672 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1673 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1674 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
1676 local
->ps_sdata
= NULL
;
1678 /* disable per-vif ps */
1679 ieee80211_recalc_ps_vif(sdata
);
1681 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1683 ieee80211_flush_queues(local
, sdata
);
1685 /* deauthenticate/disassociate now */
1686 if (tx
|| frame_buf
)
1687 ieee80211_send_deauth_disassoc(sdata
, ifmgd
->bssid
, stype
,
1688 reason
, tx
, frame_buf
);
1690 /* flush out frame */
1692 ieee80211_flush_queues(local
, sdata
);
1694 /* clear bssid only after building the needed mgmt frames */
1695 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1697 /* remove AP and TDLS peers */
1698 sta_info_flush_defer(sdata
);
1700 /* finally reset all BSS / config parameters */
1701 changed
|= ieee80211_reset_erp_info(sdata
);
1703 ieee80211_led_assoc(local
, 0);
1704 changed
|= BSS_CHANGED_ASSOC
;
1705 sdata
->vif
.bss_conf
.assoc
= false;
1707 ifmgd
->p2p_noa_index
= -1;
1708 memset(&sdata
->vif
.bss_conf
.p2p_noa_attr
, 0,
1709 sizeof(sdata
->vif
.bss_conf
.p2p_noa_attr
));
1711 /* on the next assoc, re-program HT/VHT parameters */
1712 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1713 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1714 memset(&ifmgd
->vht_capa
, 0, sizeof(ifmgd
->vht_capa
));
1715 memset(&ifmgd
->vht_capa_mask
, 0, sizeof(ifmgd
->vht_capa_mask
));
1717 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1719 del_timer_sync(&local
->dynamic_ps_timer
);
1720 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1722 /* Disable ARP filtering */
1723 if (sdata
->vif
.bss_conf
.arp_addr_cnt
)
1724 changed
|= BSS_CHANGED_ARP_FILTER
;
1726 sdata
->vif
.bss_conf
.qos
= false;
1727 changed
|= BSS_CHANGED_QOS
;
1729 /* The BSSID (not really interesting) and HT changed */
1730 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1731 ieee80211_bss_info_change_notify(sdata
, changed
);
1733 /* disassociated - set to defaults now */
1734 ieee80211_set_wmm_default(sdata
, false);
1736 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1737 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1738 del_timer_sync(&sdata
->u
.mgd
.timer
);
1739 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1741 sdata
->vif
.bss_conf
.dtim_period
= 0;
1742 sdata
->vif
.bss_conf
.beacon_rate
= NULL
;
1744 ifmgd
->have_beacon
= false;
1747 ieee80211_vif_release_channel(sdata
);
1750 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1751 struct ieee80211_hdr
*hdr
)
1754 * We can postpone the mgd.timer whenever receiving unicast frames
1755 * from AP because we know that the connection is working both ways
1756 * at that time. But multicast frames (and hence also beacons) must
1757 * be ignored here, because we need to trigger the timer during
1758 * data idle periods for sending the periodic probe request to the
1759 * AP we're connected to.
1761 if (is_multicast_ether_addr(hdr
->addr1
))
1764 ieee80211_sta_reset_conn_monitor(sdata
);
1767 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1769 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1770 struct ieee80211_local
*local
= sdata
->local
;
1772 mutex_lock(&local
->mtx
);
1773 if (!(ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
))
1776 __ieee80211_stop_poll(sdata
);
1778 mutex_lock(&local
->iflist_mtx
);
1779 ieee80211_recalc_ps(local
, -1);
1780 mutex_unlock(&local
->iflist_mtx
);
1782 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1786 * We've received a probe response, but are not sure whether
1787 * we have or will be receiving any beacons or data, so let's
1788 * schedule the timers again, just in case.
1790 ieee80211_sta_reset_beacon_monitor(sdata
);
1792 mod_timer(&ifmgd
->conn_mon_timer
,
1793 round_jiffies_up(jiffies
+
1794 IEEE80211_CONNECTION_IDLE_TIME
));
1796 mutex_unlock(&local
->mtx
);
1799 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1800 struct ieee80211_hdr
*hdr
, bool ack
)
1802 if (!ieee80211_is_data(hdr
->frame_control
))
1805 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1806 sdata
->u
.mgd
.probe_send_count
> 0) {
1808 ieee80211_sta_reset_conn_monitor(sdata
);
1810 sdata
->u
.mgd
.nullfunc_failed
= true;
1811 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1816 ieee80211_sta_reset_conn_monitor(sdata
);
1819 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1821 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1823 u8
*dst
= ifmgd
->associated
->bssid
;
1824 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1827 * Try sending broadcast probe requests for the last three
1828 * probe requests after the first ones failed since some
1829 * buggy APs only support broadcast probe requests.
1831 if (ifmgd
->probe_send_count
>= unicast_limit
)
1835 * When the hardware reports an accurate Tx ACK status, it's
1836 * better to send a nullfunc frame instead of a probe request,
1837 * as it will kick us off the AP quickly if we aren't associated
1838 * anymore. The timeout will be reset if the frame is ACKed by
1841 ifmgd
->probe_send_count
++;
1843 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1844 ifmgd
->nullfunc_failed
= false;
1845 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1850 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1851 if (WARN_ON_ONCE(ssid
== NULL
))
1856 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid_len
, NULL
,
1857 0, (u32
) -1, true, 0,
1858 ifmgd
->associated
->channel
, false);
1862 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1863 run_again(sdata
, ifmgd
->probe_timeout
);
1864 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
1865 ieee80211_flush_queues(sdata
->local
, sdata
);
1868 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1871 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1872 bool already
= false;
1874 if (!ieee80211_sdata_running(sdata
))
1879 if (!ifmgd
->associated
)
1882 mutex_lock(&sdata
->local
->mtx
);
1884 if (sdata
->local
->tmp_channel
|| sdata
->local
->scanning
) {
1885 mutex_unlock(&sdata
->local
->mtx
);
1890 mlme_dbg_ratelimited(sdata
,
1891 "detected beacon loss from AP (missed %d beacons) - probing\n",
1894 ieee80211_cqm_rssi_notify(&sdata
->vif
,
1895 NL80211_CQM_RSSI_BEACON_LOSS_EVENT
,
1900 * The driver/our work has already reported this event or the
1901 * connection monitoring has kicked in and we have already sent
1902 * a probe request. Or maybe the AP died and the driver keeps
1903 * reporting until we disassociate...
1905 * In either case we have to ignore the current call to this
1906 * function (except for setting the correct probe reason bit)
1907 * because otherwise we would reset the timer every time and
1908 * never check whether we received a probe response!
1910 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
)
1913 mutex_unlock(&sdata
->local
->mtx
);
1918 mutex_lock(&sdata
->local
->iflist_mtx
);
1919 ieee80211_recalc_ps(sdata
->local
, -1);
1920 mutex_unlock(&sdata
->local
->iflist_mtx
);
1922 ifmgd
->probe_send_count
= 0;
1923 ieee80211_mgd_probe_ap_send(sdata
);
1925 sdata_unlock(sdata
);
1928 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1929 struct ieee80211_vif
*vif
)
1931 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1932 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1933 struct cfg80211_bss
*cbss
;
1934 struct sk_buff
*skb
;
1938 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1941 sdata_assert_lock(sdata
);
1943 if (ifmgd
->associated
)
1944 cbss
= ifmgd
->associated
;
1945 else if (ifmgd
->auth_data
)
1946 cbss
= ifmgd
->auth_data
->bss
;
1947 else if (ifmgd
->assoc_data
)
1948 cbss
= ifmgd
->assoc_data
->bss
;
1953 ssid
= ieee80211_bss_get_ie(cbss
, WLAN_EID_SSID
);
1954 if (WARN_ON_ONCE(ssid
== NULL
))
1959 skb
= ieee80211_build_probe_req(sdata
, cbss
->bssid
,
1960 (u32
) -1, cbss
->channel
,
1967 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1969 static void __ieee80211_disconnect(struct ieee80211_sub_if_data
*sdata
)
1971 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1972 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
1975 if (!ifmgd
->associated
) {
1976 sdata_unlock(sdata
);
1980 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
1981 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1983 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
1984 sdata
->vif
.csa_active
= false;
1985 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
1986 IEEE80211_MAX_QUEUE_MAP
,
1987 IEEE80211_QUEUE_STOP_REASON_CSA
);
1989 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
1990 IEEE80211_DEAUTH_FRAME_LEN
);
1991 sdata_unlock(sdata
);
1994 static void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1996 struct ieee80211_sub_if_data
*sdata
=
1997 container_of(work
, struct ieee80211_sub_if_data
,
1998 u
.mgd
.beacon_connection_loss_work
);
1999 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2000 struct sta_info
*sta
;
2002 if (ifmgd
->associated
) {
2004 sta
= sta_info_get(sdata
, ifmgd
->bssid
);
2006 sta
->beacon_loss_count
++;
2010 if (ifmgd
->connection_loss
) {
2011 sdata_info(sdata
, "Connection to AP %pM lost\n",
2013 __ieee80211_disconnect(sdata
);
2015 ieee80211_mgd_probe_ap(sdata
, true);
2019 static void ieee80211_csa_connection_drop_work(struct work_struct
*work
)
2021 struct ieee80211_sub_if_data
*sdata
=
2022 container_of(work
, struct ieee80211_sub_if_data
,
2023 u
.mgd
.csa_connection_drop_work
);
2025 __ieee80211_disconnect(sdata
);
2028 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
2030 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2031 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2033 trace_api_beacon_loss(sdata
);
2035 sdata
->u
.mgd
.connection_loss
= false;
2036 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2038 EXPORT_SYMBOL(ieee80211_beacon_loss
);
2040 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
2042 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2043 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
2045 trace_api_connection_loss(sdata
);
2047 sdata
->u
.mgd
.connection_loss
= true;
2048 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
2050 EXPORT_SYMBOL(ieee80211_connection_loss
);
2053 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data
*sdata
,
2056 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2058 sdata_assert_lock(sdata
);
2061 sta_info_destroy_addr(sdata
, auth_data
->bss
->bssid
);
2063 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2064 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2065 sdata
->u
.mgd
.flags
= 0;
2066 ieee80211_vif_release_channel(sdata
);
2069 cfg80211_put_bss(sdata
->local
->hw
.wiphy
, auth_data
->bss
);
2071 sdata
->u
.mgd
.auth_data
= NULL
;
2074 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
2075 struct ieee80211_mgmt
*mgmt
, size_t len
)
2077 struct ieee80211_local
*local
= sdata
->local
;
2078 struct ieee80211_mgd_auth_data
*auth_data
= sdata
->u
.mgd
.auth_data
;
2080 struct ieee802_11_elems elems
;
2083 pos
= mgmt
->u
.auth
.variable
;
2084 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2085 if (!elems
.challenge
)
2087 auth_data
->expected_transaction
= 4;
2088 drv_mgd_prepare_tx(sdata
->local
, sdata
);
2089 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2090 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
2091 IEEE80211_TX_INTFL_MLME_CONN_TX
;
2092 ieee80211_send_auth(sdata
, 3, auth_data
->algorithm
, 0,
2093 elems
.challenge
- 2, elems
.challenge_len
+ 2,
2094 auth_data
->bss
->bssid
, auth_data
->bss
->bssid
,
2095 auth_data
->key
, auth_data
->key_len
,
2096 auth_data
->key_idx
, tx_flags
);
2099 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
2100 struct ieee80211_mgmt
*mgmt
, size_t len
)
2102 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2104 u16 auth_alg
, auth_transaction
, status_code
;
2105 struct sta_info
*sta
;
2107 sdata_assert_lock(sdata
);
2112 if (!ifmgd
->auth_data
|| ifmgd
->auth_data
->done
)
2115 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
2117 if (!ether_addr_equal(bssid
, mgmt
->bssid
))
2120 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
2121 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
2122 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
2124 if (auth_alg
!= ifmgd
->auth_data
->algorithm
||
2125 auth_transaction
!= ifmgd
->auth_data
->expected_transaction
) {
2126 sdata_info(sdata
, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2127 mgmt
->sa
, auth_alg
, ifmgd
->auth_data
->algorithm
,
2129 ifmgd
->auth_data
->expected_transaction
);
2133 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2134 sdata_info(sdata
, "%pM denied authentication (status %d)\n",
2135 mgmt
->sa
, status_code
);
2136 ieee80211_destroy_auth_data(sdata
, false);
2137 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2141 switch (ifmgd
->auth_data
->algorithm
) {
2142 case WLAN_AUTH_OPEN
:
2143 case WLAN_AUTH_LEAP
:
2147 case WLAN_AUTH_SHARED_KEY
:
2148 if (ifmgd
->auth_data
->expected_transaction
!= 4) {
2149 ieee80211_auth_challenge(sdata
, mgmt
, len
);
2150 /* need another frame */
2155 WARN_ONCE(1, "invalid auth alg %d",
2156 ifmgd
->auth_data
->algorithm
);
2160 sdata_info(sdata
, "authenticated\n");
2161 ifmgd
->auth_data
->done
= true;
2162 ifmgd
->auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_WAIT_ASSOC
;
2163 ifmgd
->auth_data
->timeout_started
= true;
2164 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2166 if (ifmgd
->auth_data
->algorithm
== WLAN_AUTH_SAE
&&
2167 ifmgd
->auth_data
->expected_transaction
!= 2) {
2169 * Report auth frame to user space for processing since another
2170 * round of Authentication frames is still needed.
2172 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2176 /* move station state to auth */
2177 mutex_lock(&sdata
->local
->sta_mtx
);
2178 sta
= sta_info_get(sdata
, bssid
);
2180 WARN_ONCE(1, "%s: STA %pM not found", sdata
->name
, bssid
);
2183 if (sta_info_move_state(sta
, IEEE80211_STA_AUTH
)) {
2184 sdata_info(sdata
, "failed moving %pM to auth\n", bssid
);
2187 mutex_unlock(&sdata
->local
->sta_mtx
);
2189 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2192 mutex_unlock(&sdata
->local
->sta_mtx
);
2193 /* ignore frame -- wait for timeout */
2197 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
2198 struct ieee80211_mgmt
*mgmt
, size_t len
)
2200 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2201 const u8
*bssid
= NULL
;
2204 sdata_assert_lock(sdata
);
2209 if (!ifmgd
->associated
||
2210 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2213 bssid
= ifmgd
->associated
->bssid
;
2215 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
2217 sdata_info(sdata
, "deauthenticated from %pM (Reason: %u)\n",
2218 bssid
, reason_code
);
2220 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2222 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2226 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
2227 struct ieee80211_mgmt
*mgmt
, size_t len
)
2229 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2232 sdata_assert_lock(sdata
);
2237 if (!ifmgd
->associated
||
2238 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2241 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
2243 sdata_info(sdata
, "disassociated from %pM (Reason: %u)\n",
2244 mgmt
->sa
, reason_code
);
2246 ieee80211_set_disassoc(sdata
, 0, 0, false, NULL
);
2248 cfg80211_rx_mlme_mgmt(sdata
->dev
, (u8
*)mgmt
, len
);
2251 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
2252 u8
*supp_rates
, unsigned int supp_rates_len
,
2253 u32
*rates
, u32
*basic_rates
,
2254 bool *have_higher_than_11mbit
,
2255 int *min_rate
, int *min_rate_index
,
2256 int shift
, u32 rate_flags
)
2260 for (i
= 0; i
< supp_rates_len
; i
++) {
2261 int rate
= supp_rates
[i
] & 0x7f;
2262 bool is_basic
= !!(supp_rates
[i
] & 0x80);
2264 if ((rate
* 5 * (1 << shift
)) > 110)
2265 *have_higher_than_11mbit
= true;
2268 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2269 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2271 * Note: Even through the membership selector and the basic
2272 * rate flag share the same bit, they are not exactly
2275 if (!!(supp_rates
[i
] & 0x80) &&
2276 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
2279 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2280 struct ieee80211_rate
*br
;
2283 br
= &sband
->bitrates
[j
];
2284 if ((rate_flags
& br
->flags
) != rate_flags
)
2287 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2288 if (brate
== rate
) {
2291 *basic_rates
|= BIT(j
);
2292 if ((rate
* 5) < *min_rate
) {
2293 *min_rate
= rate
* 5;
2294 *min_rate_index
= j
;
2302 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data
*sdata
,
2305 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
2307 sdata_assert_lock(sdata
);
2310 sta_info_destroy_addr(sdata
, assoc_data
->bss
->bssid
);
2312 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
2313 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2314 sdata
->u
.mgd
.flags
= 0;
2315 ieee80211_vif_release_channel(sdata
);
2319 sdata
->u
.mgd
.assoc_data
= NULL
;
2322 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data
*sdata
,
2323 struct cfg80211_bss
*cbss
,
2324 struct ieee80211_mgmt
*mgmt
, size_t len
)
2326 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2327 struct ieee80211_local
*local
= sdata
->local
;
2328 struct ieee80211_supported_band
*sband
;
2329 struct sta_info
*sta
;
2331 u16 capab_info
, aid
;
2332 struct ieee802_11_elems elems
;
2333 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2334 const struct cfg80211_bss_ies
*bss_ies
= NULL
;
2335 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2340 /* AssocResp and ReassocResp have identical structure */
2342 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2343 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2345 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2346 sdata_info(sdata
, "invalid AID value 0x%x; bits 15:14 not set\n",
2348 aid
&= ~(BIT(15) | BIT(14));
2350 ifmgd
->broken_ap
= false;
2352 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
2353 sdata_info(sdata
, "invalid AID value %d (out of range), turn off PS\n",
2356 ifmgd
->broken_ap
= true;
2359 pos
= mgmt
->u
.assoc_resp
.variable
;
2360 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2362 if (!elems
.supp_rates
) {
2363 sdata_info(sdata
, "no SuppRates element in AssocResp\n");
2370 * Some APs are erroneously not including some information in their
2371 * (re)association response frames. Try to recover by using the data
2372 * from the beacon or probe response. This seems to afflict mobile
2373 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2374 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2376 if ((assoc_data
->wmm
&& !elems
.wmm_param
) ||
2377 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2378 (!elems
.ht_cap_elem
|| !elems
.ht_operation
)) ||
2379 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2380 (!elems
.vht_cap_elem
|| !elems
.vht_operation
))) {
2381 const struct cfg80211_bss_ies
*ies
;
2382 struct ieee802_11_elems bss_elems
;
2385 ies
= rcu_dereference(cbss
->ies
);
2387 bss_ies
= kmemdup(ies
, sizeof(*ies
) + ies
->len
,
2393 ieee802_11_parse_elems(bss_ies
->data
, bss_ies
->len
,
2395 if (assoc_data
->wmm
&&
2396 !elems
.wmm_param
&& bss_elems
.wmm_param
) {
2397 elems
.wmm_param
= bss_elems
.wmm_param
;
2399 "AP bug: WMM param missing from AssocResp\n");
2403 * Also check if we requested HT/VHT, otherwise the AP doesn't
2404 * have to include the IEs in the (re)association response.
2406 if (!elems
.ht_cap_elem
&& bss_elems
.ht_cap_elem
&&
2407 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2408 elems
.ht_cap_elem
= bss_elems
.ht_cap_elem
;
2410 "AP bug: HT capability missing from AssocResp\n");
2412 if (!elems
.ht_operation
&& bss_elems
.ht_operation
&&
2413 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)) {
2414 elems
.ht_operation
= bss_elems
.ht_operation
;
2416 "AP bug: HT operation missing from AssocResp\n");
2418 if (!elems
.vht_cap_elem
&& bss_elems
.vht_cap_elem
&&
2419 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2420 elems
.vht_cap_elem
= bss_elems
.vht_cap_elem
;
2422 "AP bug: VHT capa missing from AssocResp\n");
2424 if (!elems
.vht_operation
&& bss_elems
.vht_operation
&&
2425 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)) {
2426 elems
.vht_operation
= bss_elems
.vht_operation
;
2428 "AP bug: VHT operation missing from AssocResp\n");
2433 * We previously checked these in the beacon/probe response, so
2434 * they should be present here. This is just a safety net.
2436 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
2437 (!elems
.wmm_param
|| !elems
.ht_cap_elem
|| !elems
.ht_operation
)) {
2439 "HT AP is missing WMM params or HT capability/operation\n");
2444 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
2445 (!elems
.vht_cap_elem
|| !elems
.vht_operation
)) {
2447 "VHT AP is missing VHT capability/operation\n");
2452 mutex_lock(&sdata
->local
->sta_mtx
);
2454 * station info was already allocated and inserted before
2455 * the association and should be available to us
2457 sta
= sta_info_get(sdata
, cbss
->bssid
);
2458 if (WARN_ON(!sta
)) {
2459 mutex_unlock(&sdata
->local
->sta_mtx
);
2464 sband
= local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
2466 /* Set up internal HT/VHT capabilities */
2467 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
))
2468 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
2469 elems
.ht_cap_elem
, sta
);
2471 if (elems
.vht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
))
2472 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata
, sband
,
2473 elems
.vht_cap_elem
, sta
);
2476 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2477 * in their association response, so ignore that data for our own
2478 * configuration. If it changed since the last beacon, we'll get the
2479 * next beacon and update then.
2483 * If an operating mode notification IE is present, override the
2484 * NSS calculation (that would be done in rate_control_rate_init())
2485 * and use the # of streams from that element.
2487 if (elems
.opmode_notif
&&
2488 !(*elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF
)) {
2491 nss
= *elems
.opmode_notif
& IEEE80211_OPMODE_NOTIF_RX_NSS_MASK
;
2492 nss
>>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT
;
2494 sta
->sta
.rx_nss
= nss
;
2497 rate_control_rate_init(sta
);
2499 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
2500 set_sta_flag(sta
, WLAN_STA_MFP
);
2502 if (elems
.wmm_param
)
2503 set_sta_flag(sta
, WLAN_STA_WME
);
2505 err
= sta_info_move_state(sta
, IEEE80211_STA_ASSOC
);
2506 if (!err
&& !(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
2507 err
= sta_info_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
2510 "failed to move station %pM to desired state\n",
2512 WARN_ON(__sta_info_destroy(sta
));
2513 mutex_unlock(&sdata
->local
->sta_mtx
);
2518 mutex_unlock(&sdata
->local
->sta_mtx
);
2521 * Always handle WMM once after association regardless
2522 * of the first value the AP uses. Setting -1 here has
2523 * that effect because the AP values is an unsigned
2526 ifmgd
->wmm_last_param_set
= -1;
2528 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) && elems
.wmm_param
)
2529 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2530 elems
.wmm_param_len
);
2532 ieee80211_set_wmm_default(sdata
, false);
2533 changed
|= BSS_CHANGED_QOS
;
2535 /* set AID and assoc capability,
2536 * ieee80211_set_associated() will tell the driver */
2537 bss_conf
->aid
= aid
;
2538 bss_conf
->assoc_capability
= capab_info
;
2539 ieee80211_set_associated(sdata
, cbss
, changed
);
2542 * If we're using 4-addr mode, let the AP know that we're
2543 * doing so, so that it can create the STA VLAN on its side
2545 if (ifmgd
->use_4addr
)
2546 ieee80211_send_4addr_nullfunc(local
, sdata
);
2549 * Start timer to probe the connection to the AP now.
2550 * Also start the timer that will detect beacon loss.
2552 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
2553 ieee80211_sta_reset_beacon_monitor(sdata
);
2561 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
2562 struct ieee80211_mgmt
*mgmt
,
2565 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2566 struct ieee80211_mgd_assoc_data
*assoc_data
= ifmgd
->assoc_data
;
2567 u16 capab_info
, status_code
, aid
;
2568 struct ieee802_11_elems elems
;
2571 struct cfg80211_bss
*bss
;
2573 sdata_assert_lock(sdata
);
2577 if (!ether_addr_equal(assoc_data
->bss
->bssid
, mgmt
->bssid
))
2581 * AssocResp and ReassocResp have identical structure, so process both
2582 * of them in this function.
2588 reassoc
= ieee80211_is_reassoc_req(mgmt
->frame_control
);
2589 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
2590 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2591 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
2594 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2595 reassoc
? "Rea" : "A", mgmt
->sa
,
2596 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
2598 pos
= mgmt
->u
.assoc_resp
.variable
;
2599 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), false, &elems
);
2601 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
2602 elems
.timeout_int
&&
2603 elems
.timeout_int
->type
== WLAN_TIMEOUT_ASSOC_COMEBACK
) {
2605 tu
= le32_to_cpu(elems
.timeout_int
->value
);
2606 ms
= tu
* 1024 / 1000;
2608 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2610 assoc_data
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
2611 assoc_data
->timeout_started
= true;
2612 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
2613 run_again(sdata
, assoc_data
->timeout
);
2617 bss
= assoc_data
->bss
;
2619 if (status_code
!= WLAN_STATUS_SUCCESS
) {
2620 sdata_info(sdata
, "%pM denied association (code=%d)\n",
2621 mgmt
->sa
, status_code
);
2622 ieee80211_destroy_assoc_data(sdata
, false);
2624 if (!ieee80211_assoc_success(sdata
, bss
, mgmt
, len
)) {
2625 /* oops -- internal error -- send timeout for now */
2626 ieee80211_destroy_assoc_data(sdata
, false);
2627 cfg80211_assoc_timeout(sdata
->dev
, bss
);
2630 sdata_info(sdata
, "associated\n");
2633 * destroy assoc_data afterwards, as otherwise an idle
2634 * recalc after assoc_data is NULL but before associated
2635 * is set can cause the interface to go idle
2637 ieee80211_destroy_assoc_data(sdata
, true);
2640 cfg80211_rx_assoc_resp(sdata
->dev
, bss
, (u8
*)mgmt
, len
);
2643 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
2644 struct ieee80211_mgmt
*mgmt
, size_t len
,
2645 struct ieee80211_rx_status
*rx_status
,
2646 struct ieee802_11_elems
*elems
)
2648 struct ieee80211_local
*local
= sdata
->local
;
2650 struct ieee80211_bss
*bss
;
2651 struct ieee80211_channel
*channel
;
2653 sdata_assert_lock(sdata
);
2655 if (elems
->ds_params
)
2656 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
2659 freq
= rx_status
->freq
;
2661 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
2663 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
2666 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
2669 ieee80211_rx_bss_put(local
, bss
);
2670 sdata
->vif
.bss_conf
.beacon_rate
= bss
->beacon_rate
;
2675 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
2676 struct sk_buff
*skb
)
2678 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
2679 struct ieee80211_if_managed
*ifmgd
;
2680 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
2681 size_t baselen
, len
= skb
->len
;
2682 struct ieee802_11_elems elems
;
2684 ifmgd
= &sdata
->u
.mgd
;
2686 sdata_assert_lock(sdata
);
2688 if (!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
2689 return; /* ignore ProbeResp to foreign address */
2691 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
2695 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
2698 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2700 if (ifmgd
->associated
&&
2701 ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2702 ieee80211_reset_ap_probe(sdata
);
2704 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->bss
->proberesp_ies
&&
2705 ether_addr_equal(mgmt
->bssid
, ifmgd
->auth_data
->bss
->bssid
)) {
2706 /* got probe response, continue with auth */
2707 sdata_info(sdata
, "direct probe responded\n");
2708 ifmgd
->auth_data
->tries
= 0;
2709 ifmgd
->auth_data
->timeout
= jiffies
;
2710 ifmgd
->auth_data
->timeout_started
= true;
2711 run_again(sdata
, ifmgd
->auth_data
->timeout
);
2716 * This is the canonical list of information elements we care about,
2717 * the filter code also gives us all changes to the Microsoft OUI
2718 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2720 * We implement beacon filtering in software since that means we can
2721 * avoid processing the frame here and in cfg80211, and userspace
2722 * will not be able to tell whether the hardware supports it or not.
2724 * XXX: This list needs to be dynamic -- userspace needs to be able to
2725 * add items it requires. It also needs to be able to tell us to
2726 * look out for other vendor IEs.
2728 static const u64 care_about_ies
=
2729 (1ULL << WLAN_EID_COUNTRY
) |
2730 (1ULL << WLAN_EID_ERP_INFO
) |
2731 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
2732 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
2733 (1ULL << WLAN_EID_HT_CAPABILITY
) |
2734 (1ULL << WLAN_EID_HT_OPERATION
);
2736 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
2737 struct ieee80211_mgmt
*mgmt
, size_t len
,
2738 struct ieee80211_rx_status
*rx_status
)
2740 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2741 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
2743 struct ieee802_11_elems elems
;
2744 struct ieee80211_local
*local
= sdata
->local
;
2745 struct ieee80211_chanctx_conf
*chanctx_conf
;
2746 struct ieee80211_channel
*chan
;
2747 struct sta_info
*sta
;
2753 u8 deauth_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
2755 sdata_assert_lock(sdata
);
2757 /* Process beacon from the current BSS */
2758 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
2763 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
2764 if (!chanctx_conf
) {
2769 if (rx_status
->freq
!= chanctx_conf
->def
.chan
->center_freq
) {
2773 chan
= chanctx_conf
->def
.chan
;
2776 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->need_beacon
&&
2777 ether_addr_equal(mgmt
->bssid
, ifmgd
->assoc_data
->bss
->bssid
)) {
2778 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
,
2779 len
- baselen
, false, &elems
);
2781 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2782 if (elems
.tim
&& !elems
.parse_error
) {
2783 const struct ieee80211_tim_ie
*tim_ie
= elems
.tim
;
2784 ifmgd
->dtim_period
= tim_ie
->dtim_period
;
2786 ifmgd
->have_beacon
= true;
2787 ifmgd
->assoc_data
->need_beacon
= false;
2788 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
2789 sdata
->vif
.bss_conf
.sync_tsf
=
2790 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2791 sdata
->vif
.bss_conf
.sync_device_ts
=
2792 rx_status
->device_timestamp
;
2794 sdata
->vif
.bss_conf
.sync_dtim_count
=
2795 elems
.tim
->dtim_count
;
2797 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
2799 /* continue assoc process */
2800 ifmgd
->assoc_data
->timeout
= jiffies
;
2801 ifmgd
->assoc_data
->timeout_started
= true;
2802 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
2806 if (!ifmgd
->associated
||
2807 !ether_addr_equal(mgmt
->bssid
, ifmgd
->associated
->bssid
))
2809 bssid
= ifmgd
->associated
->bssid
;
2811 /* Track average RSSI from the Beacon frames of the current AP */
2812 ifmgd
->last_beacon_signal
= rx_status
->signal
;
2813 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
2814 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
2815 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
2816 ifmgd
->last_cqm_event_signal
= 0;
2817 ifmgd
->count_beacon_signal
= 1;
2818 ifmgd
->last_ave_beacon_signal
= 0;
2820 ifmgd
->ave_beacon_signal
=
2821 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
2822 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
2823 ifmgd
->ave_beacon_signal
) / 16;
2824 ifmgd
->count_beacon_signal
++;
2827 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
2828 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
2829 int sig
= ifmgd
->ave_beacon_signal
;
2830 int last_sig
= ifmgd
->last_ave_beacon_signal
;
2833 * if signal crosses either of the boundaries, invoke callback
2834 * with appropriate parameters
2836 if (sig
> ifmgd
->rssi_max_thold
&&
2837 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
2838 ifmgd
->last_ave_beacon_signal
= sig
;
2839 drv_rssi_callback(local
, sdata
, RSSI_EVENT_HIGH
);
2840 } else if (sig
< ifmgd
->rssi_min_thold
&&
2841 (last_sig
>= ifmgd
->rssi_max_thold
||
2843 ifmgd
->last_ave_beacon_signal
= sig
;
2844 drv_rssi_callback(local
, sdata
, RSSI_EVENT_LOW
);
2848 if (bss_conf
->cqm_rssi_thold
&&
2849 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
2850 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
)) {
2851 int sig
= ifmgd
->ave_beacon_signal
/ 16;
2852 int last_event
= ifmgd
->last_cqm_event_signal
;
2853 int thold
= bss_conf
->cqm_rssi_thold
;
2854 int hyst
= bss_conf
->cqm_rssi_hyst
;
2856 (last_event
== 0 || sig
< last_event
- hyst
)) {
2857 ifmgd
->last_cqm_event_signal
= sig
;
2858 ieee80211_cqm_rssi_notify(
2860 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
2862 } else if (sig
> thold
&&
2863 (last_event
== 0 || sig
> last_event
+ hyst
)) {
2864 ifmgd
->last_cqm_event_signal
= sig
;
2865 ieee80211_cqm_rssi_notify(
2867 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
2872 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
) {
2873 mlme_dbg_ratelimited(sdata
,
2874 "cancelling AP probe due to a received beacon\n");
2875 ieee80211_reset_ap_probe(sdata
);
2879 * Push the beacon loss detection into the future since
2880 * we are processing a beacon from the AP just now.
2882 ieee80211_sta_reset_beacon_monitor(sdata
);
2884 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
2885 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
2886 len
- baselen
, false, &elems
,
2887 care_about_ies
, ncrc
);
2889 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
2890 bool directed_tim
= ieee80211_check_tim(elems
.tim
,
2894 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
2895 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2896 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2897 ieee80211_hw_config(local
,
2898 IEEE80211_CONF_CHANGE_PS
);
2900 ieee80211_send_nullfunc(local
, sdata
, 0);
2901 } else if (!local
->pspolling
&& sdata
->u
.mgd
.powersave
) {
2902 local
->pspolling
= true;
2905 * Here is assumed that the driver will be
2906 * able to send ps-poll frame and receive a
2907 * response even though power save mode is
2908 * enabled, but some drivers might require
2909 * to disable power save here. This needs
2910 * to be investigated.
2912 ieee80211_send_pspoll(local
, sdata
);
2917 if (sdata
->vif
.p2p
) {
2918 struct ieee80211_p2p_noa_attr noa
= {};
2921 ret
= cfg80211_get_p2p_attr(mgmt
->u
.beacon
.variable
,
2923 IEEE80211_P2P_ATTR_ABSENCE_NOTICE
,
2924 (u8
*) &noa
, sizeof(noa
));
2926 if (sdata
->u
.mgd
.p2p_noa_index
!= noa
.index
) {
2927 /* valid noa_attr and index changed */
2928 sdata
->u
.mgd
.p2p_noa_index
= noa
.index
;
2929 memcpy(&bss_conf
->p2p_noa_attr
, &noa
, sizeof(noa
));
2930 changed
|= BSS_CHANGED_P2P_PS
;
2932 * make sure we update all information, the CRC
2933 * mechanism doesn't look at P2P attributes.
2935 ifmgd
->beacon_crc_valid
= false;
2937 } else if (sdata
->u
.mgd
.p2p_noa_index
!= -1) {
2938 /* noa_attr not found and we had valid noa_attr before */
2939 sdata
->u
.mgd
.p2p_noa_index
= -1;
2940 memset(&bss_conf
->p2p_noa_attr
, 0, sizeof(bss_conf
->p2p_noa_attr
));
2941 changed
|= BSS_CHANGED_P2P_PS
;
2942 ifmgd
->beacon_crc_valid
= false;
2946 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
2948 ifmgd
->beacon_crc
= ncrc
;
2949 ifmgd
->beacon_crc_valid
= true;
2951 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
);
2953 ieee80211_sta_process_chanswitch(sdata
, rx_status
->mactime
,
2956 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) &&
2957 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
2958 elems
.wmm_param_len
))
2959 changed
|= BSS_CHANGED_QOS
;
2962 * If we haven't had a beacon before, tell the driver about the
2963 * DTIM period (and beacon timing if desired) now.
2965 if (!ifmgd
->have_beacon
) {
2966 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2968 bss_conf
->dtim_period
= elems
.tim
->dtim_period
?: 1;
2970 bss_conf
->dtim_period
= 1;
2972 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
2973 sdata
->vif
.bss_conf
.sync_tsf
=
2974 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
2975 sdata
->vif
.bss_conf
.sync_device_ts
=
2976 rx_status
->device_timestamp
;
2978 sdata
->vif
.bss_conf
.sync_dtim_count
=
2979 elems
.tim
->dtim_count
;
2981 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
2984 changed
|= BSS_CHANGED_BEACON_INFO
;
2985 ifmgd
->have_beacon
= true;
2987 mutex_lock(&local
->iflist_mtx
);
2988 ieee80211_recalc_ps(local
, -1);
2989 mutex_unlock(&local
->iflist_mtx
);
2991 ieee80211_recalc_ps_vif(sdata
);
2994 if (elems
.erp_info
) {
2996 erp_value
= elems
.erp_info
[0];
3000 changed
|= ieee80211_handle_bss_capability(sdata
,
3001 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
3002 erp_valid
, erp_value
);
3004 mutex_lock(&local
->sta_mtx
);
3005 sta
= sta_info_get(sdata
, bssid
);
3007 if (ieee80211_config_bw(sdata
, sta
, elems
.ht_operation
,
3008 elems
.vht_operation
, bssid
, &changed
)) {
3009 mutex_unlock(&local
->sta_mtx
);
3010 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3011 WLAN_REASON_DEAUTH_LEAVING
,
3013 cfg80211_tx_mlme_mgmt(sdata
->dev
, deauth_buf
,
3014 sizeof(deauth_buf
));
3018 if (sta
&& elems
.opmode_notif
)
3019 ieee80211_vht_handle_opmode(sdata
, sta
, *elems
.opmode_notif
,
3020 rx_status
->band
, true);
3021 mutex_unlock(&local
->sta_mtx
);
3023 if (elems
.country_elem
&& elems
.pwr_constr_elem
&&
3024 mgmt
->u
.probe_resp
.capab_info
&
3025 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT
))
3026 changed
|= ieee80211_handle_pwr_constr(sdata
, chan
,
3028 elems
.country_elem_len
,
3029 elems
.pwr_constr_elem
);
3031 ieee80211_bss_info_change_notify(sdata
, changed
);
3034 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
3035 struct sk_buff
*skb
)
3037 struct ieee80211_rx_status
*rx_status
;
3038 struct ieee80211_mgmt
*mgmt
;
3040 struct ieee802_11_elems elems
;
3043 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
3044 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
3045 fc
= le16_to_cpu(mgmt
->frame_control
);
3049 switch (fc
& IEEE80211_FCTL_STYPE
) {
3050 case IEEE80211_STYPE_BEACON
:
3051 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
3053 case IEEE80211_STYPE_PROBE_RESP
:
3054 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
3056 case IEEE80211_STYPE_AUTH
:
3057 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
3059 case IEEE80211_STYPE_DEAUTH
:
3060 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
3062 case IEEE80211_STYPE_DISASSOC
:
3063 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
3065 case IEEE80211_STYPE_ASSOC_RESP
:
3066 case IEEE80211_STYPE_REASSOC_RESP
:
3067 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
);
3069 case IEEE80211_STYPE_ACTION
:
3070 if (mgmt
->u
.action
.category
== WLAN_CATEGORY_SPECTRUM_MGMT
) {
3071 ies_len
= skb
->len
-
3072 offsetof(struct ieee80211_mgmt
,
3073 u
.action
.u
.chan_switch
.variable
);
3078 ieee802_11_parse_elems(
3079 mgmt
->u
.action
.u
.chan_switch
.variable
,
3080 ies_len
, true, &elems
);
3082 if (elems
.parse_error
)
3085 ieee80211_sta_process_chanswitch(sdata
,
3088 } else if (mgmt
->u
.action
.category
== WLAN_CATEGORY_PUBLIC
) {
3089 ies_len
= skb
->len
-
3090 offsetof(struct ieee80211_mgmt
,
3091 u
.action
.u
.ext_chan_switch
.variable
);
3096 ieee802_11_parse_elems(
3097 mgmt
->u
.action
.u
.ext_chan_switch
.variable
,
3098 ies_len
, true, &elems
);
3100 if (elems
.parse_error
)
3103 /* for the handling code pretend this was also an IE */
3104 elems
.ext_chansw_ie
=
3105 &mgmt
->u
.action
.u
.ext_chan_switch
.data
;
3107 ieee80211_sta_process_chanswitch(sdata
,
3113 sdata_unlock(sdata
);
3116 static void ieee80211_sta_timer(unsigned long data
)
3118 struct ieee80211_sub_if_data
*sdata
=
3119 (struct ieee80211_sub_if_data
*) data
;
3121 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3124 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
3125 u8
*bssid
, u8 reason
, bool tx
)
3127 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3129 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
, reason
,
3132 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3133 IEEE80211_DEAUTH_FRAME_LEN
);
3136 static int ieee80211_probe_auth(struct ieee80211_sub_if_data
*sdata
)
3138 struct ieee80211_local
*local
= sdata
->local
;
3139 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3140 struct ieee80211_mgd_auth_data
*auth_data
= ifmgd
->auth_data
;
3143 sdata_assert_lock(sdata
);
3145 if (WARN_ON_ONCE(!auth_data
))
3150 if (auth_data
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
3151 sdata_info(sdata
, "authentication with %pM timed out\n",
3152 auth_data
->bss
->bssid
);
3155 * Most likely AP is not in the range so remove the
3156 * bss struct for that AP.
3158 cfg80211_unlink_bss(local
->hw
.wiphy
, auth_data
->bss
);
3163 drv_mgd_prepare_tx(local
, sdata
);
3165 if (auth_data
->bss
->proberesp_ies
) {
3169 sdata_info(sdata
, "send auth to %pM (try %d/%d)\n",
3170 auth_data
->bss
->bssid
, auth_data
->tries
,
3171 IEEE80211_AUTH_MAX_TRIES
);
3173 auth_data
->expected_transaction
= 2;
3175 if (auth_data
->algorithm
== WLAN_AUTH_SAE
) {
3176 trans
= auth_data
->sae_trans
;
3177 status
= auth_data
->sae_status
;
3178 auth_data
->expected_transaction
= trans
;
3181 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3182 tx_flags
= IEEE80211_TX_CTL_REQ_TX_STATUS
|
3183 IEEE80211_TX_INTFL_MLME_CONN_TX
;
3185 ieee80211_send_auth(sdata
, trans
, auth_data
->algorithm
, status
,
3186 auth_data
->data
, auth_data
->data_len
,
3187 auth_data
->bss
->bssid
,
3188 auth_data
->bss
->bssid
, NULL
, 0, 0,
3193 sdata_info(sdata
, "direct probe to %pM (try %d/%i)\n",
3194 auth_data
->bss
->bssid
, auth_data
->tries
,
3195 IEEE80211_AUTH_MAX_TRIES
);
3198 ssidie
= ieee80211_bss_get_ie(auth_data
->bss
, WLAN_EID_SSID
);
3204 * Direct probe is sent to broadcast address as some APs
3205 * will not answer to direct packet in unassociated state.
3207 ieee80211_send_probe_req(sdata
, NULL
, ssidie
+ 2, ssidie
[1],
3208 NULL
, 0, (u32
) -1, true, 0,
3209 auth_data
->bss
->channel
, false);
3213 if (tx_flags
== 0) {
3214 auth_data
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
3215 auth_data
->timeout_started
= true;
3216 run_again(sdata
, auth_data
->timeout
);
3218 auth_data
->timeout
=
3219 round_jiffies_up(jiffies
+ IEEE80211_AUTH_TIMEOUT_LONG
);
3220 auth_data
->timeout_started
= true;
3221 run_again(sdata
, auth_data
->timeout
);
3227 static int ieee80211_do_assoc(struct ieee80211_sub_if_data
*sdata
)
3229 struct ieee80211_mgd_assoc_data
*assoc_data
= sdata
->u
.mgd
.assoc_data
;
3230 struct ieee80211_local
*local
= sdata
->local
;
3232 sdata_assert_lock(sdata
);
3234 assoc_data
->tries
++;
3235 if (assoc_data
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
3236 sdata_info(sdata
, "association with %pM timed out\n",
3237 assoc_data
->bss
->bssid
);
3240 * Most likely AP is not in the range so remove the
3241 * bss struct for that AP.
3243 cfg80211_unlink_bss(local
->hw
.wiphy
, assoc_data
->bss
);
3248 sdata_info(sdata
, "associate with %pM (try %d/%d)\n",
3249 assoc_data
->bss
->bssid
, assoc_data
->tries
,
3250 IEEE80211_ASSOC_MAX_TRIES
);
3251 ieee80211_send_assoc(sdata
);
3253 if (!(local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)) {
3254 assoc_data
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
3255 assoc_data
->timeout_started
= true;
3256 run_again(sdata
, assoc_data
->timeout
);
3258 assoc_data
->timeout
=
3259 round_jiffies_up(jiffies
+
3260 IEEE80211_ASSOC_TIMEOUT_LONG
);
3261 assoc_data
->timeout_started
= true;
3262 run_again(sdata
, assoc_data
->timeout
);
3268 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data
*sdata
,
3269 __le16 fc
, bool acked
)
3271 struct ieee80211_local
*local
= sdata
->local
;
3273 sdata
->u
.mgd
.status_fc
= fc
;
3274 sdata
->u
.mgd
.status_acked
= acked
;
3275 sdata
->u
.mgd
.status_received
= true;
3277 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
3280 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
3282 struct ieee80211_local
*local
= sdata
->local
;
3283 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3287 if (ifmgd
->status_received
) {
3288 __le16 fc
= ifmgd
->status_fc
;
3289 bool status_acked
= ifmgd
->status_acked
;
3291 ifmgd
->status_received
= false;
3292 if (ifmgd
->auth_data
&&
3293 (ieee80211_is_probe_req(fc
) || ieee80211_is_auth(fc
))) {
3295 ifmgd
->auth_data
->timeout
=
3296 jiffies
+ IEEE80211_AUTH_TIMEOUT_SHORT
;
3297 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3299 ifmgd
->auth_data
->timeout
= jiffies
- 1;
3301 ifmgd
->auth_data
->timeout_started
= true;
3302 } else if (ifmgd
->assoc_data
&&
3303 (ieee80211_is_assoc_req(fc
) ||
3304 ieee80211_is_reassoc_req(fc
))) {
3306 ifmgd
->assoc_data
->timeout
=
3307 jiffies
+ IEEE80211_ASSOC_TIMEOUT_SHORT
;
3308 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3310 ifmgd
->assoc_data
->timeout
= jiffies
- 1;
3312 ifmgd
->assoc_data
->timeout_started
= true;
3316 if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
&&
3317 time_after(jiffies
, ifmgd
->auth_data
->timeout
)) {
3318 if (ifmgd
->auth_data
->done
) {
3320 * ok ... we waited for assoc but userspace didn't,
3321 * so let's just kill the auth data
3323 ieee80211_destroy_auth_data(sdata
, false);
3324 } else if (ieee80211_probe_auth(sdata
)) {
3327 memcpy(bssid
, ifmgd
->auth_data
->bss
->bssid
, ETH_ALEN
);
3329 ieee80211_destroy_auth_data(sdata
, false);
3331 cfg80211_auth_timeout(sdata
->dev
, bssid
);
3333 } else if (ifmgd
->auth_data
&& ifmgd
->auth_data
->timeout_started
)
3334 run_again(sdata
, ifmgd
->auth_data
->timeout
);
3336 if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
&&
3337 time_after(jiffies
, ifmgd
->assoc_data
->timeout
)) {
3338 if ((ifmgd
->assoc_data
->need_beacon
&& !ifmgd
->have_beacon
) ||
3339 ieee80211_do_assoc(sdata
)) {
3340 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
3342 ieee80211_destroy_assoc_data(sdata
, false);
3343 cfg80211_assoc_timeout(sdata
->dev
, bss
);
3345 } else if (ifmgd
->assoc_data
&& ifmgd
->assoc_data
->timeout_started
)
3346 run_again(sdata
, ifmgd
->assoc_data
->timeout
);
3348 if (ifmgd
->flags
& IEEE80211_STA_CONNECTION_POLL
&&
3349 ifmgd
->associated
) {
3353 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
3355 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
3356 max_tries
= max_nullfunc_tries
;
3358 max_tries
= max_probe_tries
;
3360 /* ACK received for nullfunc probing frame */
3361 if (!ifmgd
->probe_send_count
)
3362 ieee80211_reset_ap_probe(sdata
);
3363 else if (ifmgd
->nullfunc_failed
) {
3364 if (ifmgd
->probe_send_count
< max_tries
) {
3366 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3367 bssid
, ifmgd
->probe_send_count
,
3369 ieee80211_mgd_probe_ap_send(sdata
);
3372 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3374 ieee80211_sta_connection_lost(sdata
, bssid
,
3375 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
3378 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
3379 run_again(sdata
, ifmgd
->probe_timeout
);
3380 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
3382 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3383 bssid
, probe_wait_ms
);
3384 ieee80211_sta_connection_lost(sdata
, bssid
,
3385 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3386 } else if (ifmgd
->probe_send_count
< max_tries
) {
3388 "No probe response from AP %pM after %dms, try %d/%i\n",
3389 bssid
, probe_wait_ms
,
3390 ifmgd
->probe_send_count
, max_tries
);
3391 ieee80211_mgd_probe_ap_send(sdata
);
3394 * We actually lost the connection ... or did we?
3397 wiphy_debug(local
->hw
.wiphy
,
3398 "%s: No probe response from AP %pM"
3399 " after %dms, disconnecting.\n",
3401 bssid
, probe_wait_ms
);
3403 ieee80211_sta_connection_lost(sdata
, bssid
,
3404 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
, false);
3408 sdata_unlock(sdata
);
3411 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
3413 struct ieee80211_sub_if_data
*sdata
=
3414 (struct ieee80211_sub_if_data
*) data
;
3415 struct ieee80211_local
*local
= sdata
->local
;
3417 if (local
->quiescing
)
3420 sdata
->u
.mgd
.connection_loss
= false;
3421 ieee80211_queue_work(&sdata
->local
->hw
,
3422 &sdata
->u
.mgd
.beacon_connection_loss_work
);
3425 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
3427 struct ieee80211_sub_if_data
*sdata
=
3428 (struct ieee80211_sub_if_data
*) data
;
3429 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3430 struct ieee80211_local
*local
= sdata
->local
;
3432 if (local
->quiescing
)
3435 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
3438 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
3440 struct ieee80211_sub_if_data
*sdata
=
3441 container_of(work
, struct ieee80211_sub_if_data
,
3442 u
.mgd
.monitor_work
);
3444 ieee80211_mgd_probe_ap(sdata
, false);
3447 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
3451 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
3452 __ieee80211_stop_poll(sdata
);
3454 /* let's probe the connection once */
3455 flags
= sdata
->local
->hw
.flags
;
3456 if (!(flags
& IEEE80211_HW_CONNECTION_MONITOR
))
3457 ieee80211_queue_work(&sdata
->local
->hw
,
3458 &sdata
->u
.mgd
.monitor_work
);
3459 /* and do all the other regular work too */
3460 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
3465 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
3467 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3470 if (!ifmgd
->associated
) {
3471 sdata_unlock(sdata
);
3475 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
3476 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
3477 mlme_dbg(sdata
, "driver requested disconnect after resume\n");
3478 ieee80211_sta_connection_lost(sdata
,
3479 ifmgd
->associated
->bssid
,
3480 WLAN_REASON_UNSPECIFIED
,
3482 sdata_unlock(sdata
);
3485 sdata_unlock(sdata
);
3489 /* interface setup */
3490 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
3492 struct ieee80211_if_managed
*ifmgd
;
3494 ifmgd
= &sdata
->u
.mgd
;
3495 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
3496 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
3497 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
3498 ieee80211_beacon_connection_loss_work
);
3499 INIT_WORK(&ifmgd
->csa_connection_drop_work
,
3500 ieee80211_csa_connection_drop_work
);
3501 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_mgd_work
);
3502 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
3503 (unsigned long) sdata
);
3504 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
3505 (unsigned long) sdata
);
3506 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
3507 (unsigned long) sdata
);
3508 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
3509 (unsigned long) sdata
);
3512 ifmgd
->powersave
= sdata
->wdev
.ps
;
3513 ifmgd
->uapsd_queues
= sdata
->local
->hw
.uapsd_queues
;
3514 ifmgd
->uapsd_max_sp_len
= sdata
->local
->hw
.uapsd_max_sp_len
;
3515 ifmgd
->p2p_noa_index
= -1;
3517 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
3518 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
3520 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
3523 /* scan finished notification */
3524 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
3526 struct ieee80211_sub_if_data
*sdata
;
3528 /* Restart STA timers */
3530 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
3531 if (ieee80211_sdata_running(sdata
))
3532 ieee80211_restart_sta_timer(sdata
);
3537 int ieee80211_max_network_latency(struct notifier_block
*nb
,
3538 unsigned long data
, void *dummy
)
3540 s32 latency_usec
= (s32
) data
;
3541 struct ieee80211_local
*local
=
3542 container_of(nb
, struct ieee80211_local
,
3543 network_latency_notifier
);
3545 mutex_lock(&local
->iflist_mtx
);
3546 ieee80211_recalc_ps(local
, latency_usec
);
3547 mutex_unlock(&local
->iflist_mtx
);
3552 static u8
ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data
*sdata
,
3553 struct cfg80211_bss
*cbss
)
3555 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3556 const u8
*ht_cap_ie
, *vht_cap_ie
;
3557 const struct ieee80211_ht_cap
*ht_cap
;
3558 const struct ieee80211_vht_cap
*vht_cap
;
3561 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
)
3564 ht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3565 if (ht_cap_ie
&& ht_cap_ie
[1] >= sizeof(*ht_cap
)) {
3566 ht_cap
= (void *)(ht_cap_ie
+ 2);
3567 chains
= ieee80211_mcs_to_chains(&ht_cap
->mcs
);
3569 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3570 * "Tx Unequal Modulation Supported" fields.
3574 if (ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
)
3577 vht_cap_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3578 if (vht_cap_ie
&& vht_cap_ie
[1] >= sizeof(*vht_cap
)) {
3582 vht_cap
= (void *)(vht_cap_ie
+ 2);
3583 tx_mcs_map
= le16_to_cpu(vht_cap
->supp_mcs
.tx_mcs_map
);
3584 for (nss
= 8; nss
> 0; nss
--) {
3585 if (((tx_mcs_map
>> (2 * (nss
- 1))) & 3) !=
3586 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
3589 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3590 chains
= max(chains
, nss
);
3596 static int ieee80211_prep_channel(struct ieee80211_sub_if_data
*sdata
,
3597 struct cfg80211_bss
*cbss
)
3599 struct ieee80211_local
*local
= sdata
->local
;
3600 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3601 const struct ieee80211_ht_operation
*ht_oper
= NULL
;
3602 const struct ieee80211_vht_operation
*vht_oper
= NULL
;
3603 struct ieee80211_supported_band
*sband
;
3604 struct cfg80211_chan_def chandef
;
3607 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3609 ifmgd
->flags
&= ~(IEEE80211_STA_DISABLE_40MHZ
|
3610 IEEE80211_STA_DISABLE_80P80MHZ
|
3611 IEEE80211_STA_DISABLE_160MHZ
);
3615 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_HT
) &&
3616 sband
->ht_cap
.ht_supported
) {
3617 const u8
*ht_oper_ie
, *ht_cap
;
3619 ht_oper_ie
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_OPERATION
);
3620 if (ht_oper_ie
&& ht_oper_ie
[1] >= sizeof(*ht_oper
))
3621 ht_oper
= (void *)(ht_oper_ie
+ 2);
3623 ht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_HT_CAPABILITY
);
3624 if (!ht_cap
|| ht_cap
[1] < sizeof(struct ieee80211_ht_cap
)) {
3625 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3630 if (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_VHT
) &&
3631 sband
->vht_cap
.vht_supported
) {
3632 const u8
*vht_oper_ie
, *vht_cap
;
3634 vht_oper_ie
= ieee80211_bss_get_ie(cbss
,
3635 WLAN_EID_VHT_OPERATION
);
3636 if (vht_oper_ie
&& vht_oper_ie
[1] >= sizeof(*vht_oper
))
3637 vht_oper
= (void *)(vht_oper_ie
+ 2);
3638 if (vht_oper
&& !ht_oper
) {
3641 "AP advertised VHT without HT, disabling both\n");
3642 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
3643 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3646 vht_cap
= ieee80211_bss_get_ie(cbss
, WLAN_EID_VHT_CAPABILITY
);
3647 if (!vht_cap
|| vht_cap
[1] < sizeof(struct ieee80211_vht_cap
)) {
3648 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
3653 ifmgd
->flags
|= ieee80211_determine_chantype(sdata
, sband
,
3658 sdata
->needed_rx_chains
= min(ieee80211_ht_vht_rx_chains(sdata
, cbss
),
3663 /* will change later if needed */
3664 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
3667 * If this fails (possibly due to channel context sharing
3668 * on incompatible channels, e.g. 80+80 and 160 sharing the
3669 * same control channel) try to use a smaller bandwidth.
3671 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3672 IEEE80211_CHANCTX_SHARED
);
3674 /* don't downgrade for 5 and 10 MHz channels, though. */
3675 if (chandef
.width
== NL80211_CHAN_WIDTH_5
||
3676 chandef
.width
== NL80211_CHAN_WIDTH_10
)
3679 while (ret
&& chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
) {
3680 ifmgd
->flags
|= ieee80211_chandef_downgrade(&chandef
);
3681 ret
= ieee80211_vif_use_channel(sdata
, &chandef
,
3682 IEEE80211_CHANCTX_SHARED
);
3687 static int ieee80211_prep_connection(struct ieee80211_sub_if_data
*sdata
,
3688 struct cfg80211_bss
*cbss
, bool assoc
)
3690 struct ieee80211_local
*local
= sdata
->local
;
3691 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3692 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
3693 struct sta_info
*new_sta
= NULL
;
3694 bool have_sta
= false;
3697 if (WARN_ON(!ifmgd
->auth_data
&& !ifmgd
->assoc_data
))
3702 have_sta
= sta_info_get(sdata
, cbss
->bssid
);
3707 new_sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
3712 u32 rates
= 0, basic_rates
= 0;
3713 bool have_higher_than_11mbit
;
3714 int min_rate
= INT_MAX
, min_rate_index
= -1;
3715 struct ieee80211_chanctx_conf
*chanctx_conf
;
3716 struct ieee80211_supported_band
*sband
;
3717 const struct cfg80211_bss_ies
*ies
;
3721 sband
= local
->hw
.wiphy
->bands
[cbss
->channel
->band
];
3723 err
= ieee80211_prep_channel(sdata
, cbss
);
3725 sta_info_free(local
, new_sta
);
3728 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
3731 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
3732 if (WARN_ON(!chanctx_conf
)) {
3736 rate_flags
= ieee80211_chandef_rate_flags(&chanctx_conf
->def
);
3739 ieee80211_get_rates(sband
, bss
->supp_rates
,
3740 bss
->supp_rates_len
,
3741 &rates
, &basic_rates
,
3742 &have_higher_than_11mbit
,
3743 &min_rate
, &min_rate_index
,
3747 * This used to be a workaround for basic rates missing
3748 * in the association response frame. Now that we no
3749 * longer use the basic rates from there, it probably
3750 * doesn't happen any more, but keep the workaround so
3751 * in case some *other* APs are buggy in different ways
3752 * we can connect -- with a warning.
3754 if (!basic_rates
&& min_rate_index
>= 0) {
3756 "No basic rates, using min rate instead\n");
3757 basic_rates
= BIT(min_rate_index
);
3760 new_sta
->sta
.supp_rates
[cbss
->channel
->band
] = rates
;
3761 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
3763 /* cf. IEEE 802.11 9.2.12 */
3764 if (cbss
->channel
->band
== IEEE80211_BAND_2GHZ
&&
3765 have_higher_than_11mbit
)
3766 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
3768 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
3770 memcpy(ifmgd
->bssid
, cbss
->bssid
, ETH_ALEN
);
3772 /* set timing information */
3773 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
3775 ies
= rcu_dereference(cbss
->beacon_ies
);
3779 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3780 sdata
->vif
.bss_conf
.sync_device_ts
=
3781 bss
->device_ts_beacon
;
3782 tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
3783 ies
->data
, ies
->len
);
3784 if (tim_ie
&& tim_ie
[1] >= 2)
3785 sdata
->vif
.bss_conf
.sync_dtim_count
= tim_ie
[2];
3787 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3788 } else if (!(local
->hw
.flags
&
3789 IEEE80211_HW_TIMING_BEACON_ONLY
)) {
3790 ies
= rcu_dereference(cbss
->proberesp_ies
);
3791 /* must be non-NULL since beacon IEs were NULL */
3792 sdata
->vif
.bss_conf
.sync_tsf
= ies
->tsf
;
3793 sdata
->vif
.bss_conf
.sync_device_ts
=
3794 bss
->device_ts_presp
;
3795 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3797 sdata
->vif
.bss_conf
.sync_tsf
= 0;
3798 sdata
->vif
.bss_conf
.sync_device_ts
= 0;
3799 sdata
->vif
.bss_conf
.sync_dtim_count
= 0;
3803 /* tell driver about BSSID, basic rates and timing */
3804 ieee80211_bss_info_change_notify(sdata
,
3805 BSS_CHANGED_BSSID
| BSS_CHANGED_BASIC_RATES
|
3806 BSS_CHANGED_BEACON_INT
);
3809 sta_info_pre_move_state(new_sta
, IEEE80211_STA_AUTH
);
3811 err
= sta_info_insert(new_sta
);
3815 "failed to insert STA entry for the AP (error %d)\n",
3820 WARN_ON_ONCE(!ether_addr_equal(ifmgd
->bssid
, cbss
->bssid
));
3826 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
3827 struct cfg80211_auth_request
*req
)
3829 struct ieee80211_local
*local
= sdata
->local
;
3830 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3831 struct ieee80211_mgd_auth_data
*auth_data
;
3835 /* prepare auth data structure */
3837 switch (req
->auth_type
) {
3838 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
3839 auth_alg
= WLAN_AUTH_OPEN
;
3841 case NL80211_AUTHTYPE_SHARED_KEY
:
3842 if (IS_ERR(local
->wep_tx_tfm
))
3844 auth_alg
= WLAN_AUTH_SHARED_KEY
;
3846 case NL80211_AUTHTYPE_FT
:
3847 auth_alg
= WLAN_AUTH_FT
;
3849 case NL80211_AUTHTYPE_NETWORK_EAP
:
3850 auth_alg
= WLAN_AUTH_LEAP
;
3852 case NL80211_AUTHTYPE_SAE
:
3853 auth_alg
= WLAN_AUTH_SAE
;
3859 auth_data
= kzalloc(sizeof(*auth_data
) + req
->sae_data_len
+
3860 req
->ie_len
, GFP_KERNEL
);
3864 auth_data
->bss
= req
->bss
;
3866 if (req
->sae_data_len
>= 4) {
3867 __le16
*pos
= (__le16
*) req
->sae_data
;
3868 auth_data
->sae_trans
= le16_to_cpu(pos
[0]);
3869 auth_data
->sae_status
= le16_to_cpu(pos
[1]);
3870 memcpy(auth_data
->data
, req
->sae_data
+ 4,
3871 req
->sae_data_len
- 4);
3872 auth_data
->data_len
+= req
->sae_data_len
- 4;
3875 if (req
->ie
&& req
->ie_len
) {
3876 memcpy(&auth_data
->data
[auth_data
->data_len
],
3877 req
->ie
, req
->ie_len
);
3878 auth_data
->data_len
+= req
->ie_len
;
3881 if (req
->key
&& req
->key_len
) {
3882 auth_data
->key_len
= req
->key_len
;
3883 auth_data
->key_idx
= req
->key_idx
;
3884 memcpy(auth_data
->key
, req
->key
, req
->key_len
);
3887 auth_data
->algorithm
= auth_alg
;
3889 /* try to authenticate/probe */
3891 if ((ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) ||
3892 ifmgd
->assoc_data
) {
3897 if (ifmgd
->auth_data
)
3898 ieee80211_destroy_auth_data(sdata
, false);
3900 /* prep auth_data so we don't go into idle on disassoc */
3901 ifmgd
->auth_data
= auth_data
;
3903 if (ifmgd
->associated
) {
3904 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
3906 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
3907 WLAN_REASON_UNSPECIFIED
,
3910 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
3914 sdata_info(sdata
, "authenticate with %pM\n", req
->bss
->bssid
);
3916 err
= ieee80211_prep_connection(sdata
, req
->bss
, false);
3920 err
= ieee80211_probe_auth(sdata
);
3922 sta_info_destroy_addr(sdata
, req
->bss
->bssid
);
3926 /* hold our own reference */
3927 cfg80211_ref_bss(local
->hw
.wiphy
, auth_data
->bss
);
3931 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
3932 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
3933 ifmgd
->auth_data
= NULL
;
3939 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data
*sdata
,
3940 const u8
*wmm_param
, int len
)
3948 if (wmm_param
[5] != 1 /* version */)
3951 pos
= wmm_param
+ 8;
3954 for (; left
>= 4; left
-= 4, pos
+= 4) {
3955 u8 aifsn
= pos
[0] & 0x0f;
3956 u8 ecwmin
= pos
[1] & 0x0f;
3957 u8 ecwmax
= (pos
[1] & 0xf0) >> 4;
3958 int aci
= (pos
[0] >> 5) & 0x03;
3962 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
3966 if (ecwmin
> ecwmax
) {
3968 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
3969 ecwmin
, ecwmax
, aci
);
3977 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
3978 struct cfg80211_assoc_request
*req
)
3980 struct ieee80211_local
*local
= sdata
->local
;
3981 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
3982 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
3983 struct ieee80211_mgd_assoc_data
*assoc_data
;
3984 const struct cfg80211_bss_ies
*beacon_ies
;
3985 struct ieee80211_supported_band
*sband
;
3986 const u8
*ssidie
, *ht_ie
, *vht_ie
;
3989 assoc_data
= kzalloc(sizeof(*assoc_data
) + req
->ie_len
, GFP_KERNEL
);
3994 ssidie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
4000 memcpy(assoc_data
->ssid
, ssidie
+ 2, ssidie
[1]);
4001 assoc_data
->ssid_len
= ssidie
[1];
4004 if (ifmgd
->associated
) {
4005 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4007 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4008 WLAN_REASON_UNSPECIFIED
,
4011 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4015 if (ifmgd
->auth_data
&& !ifmgd
->auth_data
->done
) {
4020 if (ifmgd
->assoc_data
) {
4025 if (ifmgd
->auth_data
) {
4028 /* keep sta info, bssid if matching */
4029 match
= ether_addr_equal(ifmgd
->bssid
, req
->bss
->bssid
);
4030 ieee80211_destroy_auth_data(sdata
, match
);
4033 /* prepare assoc data */
4035 ifmgd
->beacon_crc_valid
= false;
4037 assoc_data
->wmm
= bss
->wmm_used
&&
4038 (local
->hw
.queues
>= IEEE80211_NUM_ACS
);
4039 if (assoc_data
->wmm
) {
4040 /* try to check validity of WMM params IE */
4041 const struct cfg80211_bss_ies
*ies
;
4042 const u8
*wp
, *start
, *end
;
4045 ies
= rcu_dereference(req
->bss
->ies
);
4047 end
= start
+ ies
->len
;
4050 wp
= cfg80211_find_vendor_ie(
4052 WLAN_OUI_TYPE_MICROSOFT_WMM
,
4053 start
, end
- start
);
4056 start
= wp
+ wp
[1] + 2;
4057 /* if this IE is too short, try the next */
4060 /* if this IE is WMM params, we found what we wanted */
4065 if (!wp
|| !ieee80211_usable_wmm_params(sdata
, wp
+ 2,
4067 assoc_data
->wmm
= false;
4068 ifmgd
->flags
|= IEEE80211_STA_DISABLE_WMM
;
4074 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4075 * We still associate in non-HT mode (11a/b/g) if any one of these
4076 * ciphers is configured as pairwise.
4077 * We can set this to true for non-11n hardware, that'll be checked
4078 * separately along with the peer capabilities.
4080 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++) {
4081 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
4082 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
4083 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
) {
4084 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4085 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4086 netdev_info(sdata
->dev
,
4087 "disabling HT/VHT due to WEP/TKIP use\n");
4091 if (req
->flags
& ASSOC_REQ_DISABLE_HT
) {
4092 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4093 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4096 if (req
->flags
& ASSOC_REQ_DISABLE_VHT
)
4097 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4099 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4100 sband
= local
->hw
.wiphy
->bands
[req
->bss
->channel
->band
];
4101 if (!sband
->ht_cap
.ht_supported
||
4102 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4103 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4104 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4105 if (!bss
->wmm_used
&&
4106 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4107 netdev_info(sdata
->dev
,
4108 "disabling HT as WMM/QoS is not supported by the AP\n");
4111 /* disable VHT if we don't support it or the AP doesn't use WMM */
4112 if (!sband
->vht_cap
.vht_supported
||
4113 local
->hw
.queues
< IEEE80211_NUM_ACS
|| !bss
->wmm_used
||
4114 ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
) {
4115 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4116 if (!bss
->wmm_used
&&
4117 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_WMM
))
4118 netdev_info(sdata
->dev
,
4119 "disabling VHT as WMM/QoS is not supported by the AP\n");
4122 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
4123 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
4124 sizeof(ifmgd
->ht_capa_mask
));
4126 memcpy(&ifmgd
->vht_capa
, &req
->vht_capa
, sizeof(ifmgd
->vht_capa
));
4127 memcpy(&ifmgd
->vht_capa_mask
, &req
->vht_capa_mask
,
4128 sizeof(ifmgd
->vht_capa_mask
));
4130 if (req
->ie
&& req
->ie_len
) {
4131 memcpy(assoc_data
->ie
, req
->ie
, req
->ie_len
);
4132 assoc_data
->ie_len
= req
->ie_len
;
4135 assoc_data
->bss
= req
->bss
;
4137 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
4138 if (ifmgd
->powersave
)
4139 sdata
->smps_mode
= IEEE80211_SMPS_DYNAMIC
;
4141 sdata
->smps_mode
= IEEE80211_SMPS_OFF
;
4143 sdata
->smps_mode
= ifmgd
->req_smps
;
4145 assoc_data
->capability
= req
->bss
->capability
;
4146 assoc_data
->supp_rates
= bss
->supp_rates
;
4147 assoc_data
->supp_rates_len
= bss
->supp_rates_len
;
4150 ht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_OPERATION
);
4151 if (ht_ie
&& ht_ie
[1] >= sizeof(struct ieee80211_ht_operation
))
4152 assoc_data
->ap_ht_param
=
4153 ((struct ieee80211_ht_operation
*)(ht_ie
+ 2))->ht_param
;
4155 ifmgd
->flags
|= IEEE80211_STA_DISABLE_HT
;
4156 vht_ie
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_VHT_CAPABILITY
);
4157 if (vht_ie
&& vht_ie
[1] >= sizeof(struct ieee80211_vht_cap
))
4158 memcpy(&assoc_data
->ap_vht_cap
, vht_ie
+ 2,
4159 sizeof(struct ieee80211_vht_cap
));
4161 ifmgd
->flags
|= IEEE80211_STA_DISABLE_VHT
;
4164 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
4165 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
) &&
4166 sdata
->wmm_acm
!= 0xff) {
4167 assoc_data
->uapsd
= true;
4168 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
4170 assoc_data
->uapsd
= false;
4171 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
4174 if (req
->prev_bssid
)
4175 memcpy(assoc_data
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
4178 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
4179 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
4181 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
4182 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
4185 if (req
->crypto
.control_port
)
4186 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
4188 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
4190 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
4191 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
4193 /* kick off associate process */
4195 ifmgd
->assoc_data
= assoc_data
;
4196 ifmgd
->dtim_period
= 0;
4197 ifmgd
->have_beacon
= false;
4199 err
= ieee80211_prep_connection(sdata
, req
->bss
, true);
4204 beacon_ies
= rcu_dereference(req
->bss
->beacon_ies
);
4206 if (sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
&&
4209 * Wait up to one beacon interval ...
4210 * should this be more if we miss one?
4212 sdata_info(sdata
, "waiting for beacon from %pM\n",
4214 assoc_data
->timeout
= TU_TO_EXP_TIME(req
->bss
->beacon_interval
);
4215 assoc_data
->timeout_started
= true;
4216 assoc_data
->need_beacon
= true;
4217 } else if (beacon_ies
) {
4218 const u8
*tim_ie
= cfg80211_find_ie(WLAN_EID_TIM
,
4223 if (tim_ie
&& tim_ie
[1] >= sizeof(struct ieee80211_tim_ie
)) {
4224 const struct ieee80211_tim_ie
*tim
;
4225 tim
= (void *)(tim_ie
+ 2);
4226 ifmgd
->dtim_period
= tim
->dtim_period
;
4227 dtim_count
= tim
->dtim_count
;
4229 ifmgd
->have_beacon
= true;
4230 assoc_data
->timeout
= jiffies
;
4231 assoc_data
->timeout_started
= true;
4233 if (local
->hw
.flags
& IEEE80211_HW_TIMING_BEACON_ONLY
) {
4234 sdata
->vif
.bss_conf
.sync_tsf
= beacon_ies
->tsf
;
4235 sdata
->vif
.bss_conf
.sync_device_ts
=
4236 bss
->device_ts_beacon
;
4237 sdata
->vif
.bss_conf
.sync_dtim_count
= dtim_count
;
4240 assoc_data
->timeout
= jiffies
;
4241 assoc_data
->timeout_started
= true;
4245 run_again(sdata
, assoc_data
->timeout
);
4247 if (bss
->corrupt_data
) {
4248 char *corrupt_type
= "data";
4249 if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_BEACON
) {
4250 if (bss
->corrupt_data
&
4251 IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4252 corrupt_type
= "beacon and probe response";
4254 corrupt_type
= "beacon";
4255 } else if (bss
->corrupt_data
& IEEE80211_BSS_CORRUPT_PROBE_RESP
)
4256 corrupt_type
= "probe response";
4257 sdata_info(sdata
, "associating with AP with corrupt %s\n",
4263 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
4264 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
4265 ifmgd
->assoc_data
= NULL
;
4271 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
4272 struct cfg80211_deauth_request
*req
)
4274 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4275 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4276 bool tx
= !req
->local_state_change
;
4277 bool report_frame
= false;
4280 "deauthenticating from %pM by local choice (reason=%d)\n",
4281 req
->bssid
, req
->reason_code
);
4283 if (ifmgd
->auth_data
) {
4284 drv_mgd_prepare_tx(sdata
->local
, sdata
);
4285 ieee80211_send_deauth_disassoc(sdata
, req
->bssid
,
4286 IEEE80211_STYPE_DEAUTH
,
4287 req
->reason_code
, tx
,
4289 ieee80211_destroy_auth_data(sdata
, false);
4291 report_frame
= true;
4295 if (ifmgd
->associated
&&
4296 ether_addr_equal(ifmgd
->associated
->bssid
, req
->bssid
)) {
4297 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DEAUTH
,
4298 req
->reason_code
, tx
, frame_buf
);
4299 report_frame
= true;
4304 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4305 IEEE80211_DEAUTH_FRAME_LEN
);
4310 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
4311 struct cfg80211_disassoc_request
*req
)
4313 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4315 u8 frame_buf
[IEEE80211_DEAUTH_FRAME_LEN
];
4318 * cfg80211 should catch this ... but it's racy since
4319 * we can receive a disassoc frame, process it, hand it
4320 * to cfg80211 while that's in a locked section already
4321 * trying to tell us that the user wants to disconnect.
4323 if (ifmgd
->associated
!= req
->bss
)
4327 "disassociating from %pM by local choice (reason=%d)\n",
4328 req
->bss
->bssid
, req
->reason_code
);
4330 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
4331 ieee80211_set_disassoc(sdata
, IEEE80211_STYPE_DISASSOC
,
4332 req
->reason_code
, !req
->local_state_change
,
4335 cfg80211_tx_mlme_mgmt(sdata
->dev
, frame_buf
,
4336 IEEE80211_DEAUTH_FRAME_LEN
);
4341 void ieee80211_mgd_stop(struct ieee80211_sub_if_data
*sdata
)
4343 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
4346 * Make sure some work items will not run after this,
4347 * they will not do anything but might not have been
4348 * cancelled when disconnecting.
4350 cancel_work_sync(&ifmgd
->monitor_work
);
4351 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
4352 cancel_work_sync(&ifmgd
->request_smps_work
);
4353 cancel_work_sync(&ifmgd
->csa_connection_drop_work
);
4354 cancel_work_sync(&ifmgd
->chswitch_work
);
4357 if (ifmgd
->assoc_data
) {
4358 struct cfg80211_bss
*bss
= ifmgd
->assoc_data
->bss
;
4359 ieee80211_destroy_assoc_data(sdata
, false);
4360 cfg80211_assoc_timeout(sdata
->dev
, bss
);
4362 if (ifmgd
->auth_data
)
4363 ieee80211_destroy_auth_data(sdata
, false);
4364 del_timer_sync(&ifmgd
->timer
);
4365 sdata_unlock(sdata
);
4368 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
4369 enum nl80211_cqm_rssi_threshold_event rssi_event
,
4372 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
4374 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
4376 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
4378 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);