1 // SPDX-License-Identifier: GPL-2.0-only
3 * BSS client mode implementation
4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
5 * Copyright 2004, Instant802 Networks, Inc.
6 * Copyright 2005, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
11 * Copyright (C) 2018 - 2019 Intel Corporation
14 #include <linux/delay.h>
15 #include <linux/fips.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/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"
32 #include "fils_aead.h"
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
45 static int max_nullfunc_tries = 2;
46 module_param(max_nullfunc_tries, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
50 static int max_probe_tries = 5;
51 module_param(max_probe_tries, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
63 static int beacon_loss_count = 7;
64 module_param(beacon_loss_count, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
78 static int probe_wait_ms = 500;
79 module_param(probe_wait_ms, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
100 static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
103 sdata_assert_lock(sdata);
105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
126 if (unlikely(!ifmgd->associated))
129 if (ifmgd->probe_send_count)
130 ifmgd->probe_send_count = 0;
132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
135 mod_timer(&ifmgd->conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
139 static int ecw2cw(int ecw)
141 return (1 << ecw) - 1;
145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
146 struct ieee80211_supported_band *sband,
147 struct ieee80211_channel *channel,
148 const struct ieee80211_ht_operation *ht_oper,
149 const struct ieee80211_vht_operation *vht_oper,
150 const struct ieee80211_he_operation *he_oper,
151 struct cfg80211_chan_def *chandef, bool tracking)
153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154 struct cfg80211_chan_def vht_chandef;
155 struct ieee80211_sta_ht_cap sta_ht_cap;
158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
161 chandef->chan = channel;
162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
163 chandef->center_freq1 = channel->center_freq;
164 chandef->center_freq2 = 0;
166 if (!ht_oper || !sta_ht_cap.ht_supported) {
167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
171 chandef->width = NL80211_CHAN_WIDTH_20;
173 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
175 /* check that channel matches the right operating channel */
176 if (!tracking && channel->center_freq != ht_cfreq) {
178 * It's possible that some APs are confused here;
179 * Netgear WNDR3700 sometimes reports 4 higher than
180 * the actual channel in association responses, but
181 * since we look at probe response/beacon data here
185 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
186 channel->center_freq, ht_cfreq,
187 ht_oper->primary_chan, channel->band);
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
192 /* check 40 MHz support, if we have it */
193 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
194 ieee80211_chandef_ht_oper(ht_oper, chandef);
196 /* 40 MHz (and 80 MHz) must be supported for VHT */
197 ret = IEEE80211_STA_DISABLE_VHT;
198 /* also mark 40 MHz disabled */
199 ret |= IEEE80211_STA_DISABLE_40MHZ;
203 if (!vht_oper || !sband->vht_cap.vht_supported) {
204 ret = IEEE80211_STA_DISABLE_VHT;
208 vht_chandef = *chandef;
209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
210 (le32_to_cpu(he_oper->he_oper_params) &
211 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
212 struct ieee80211_vht_operation he_oper_vht_cap;
215 * Set only first 3 bytes (other 2 aren't used in
216 * ieee80211_chandef_vht_oper() anyway)
218 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
219 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
221 if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
222 &he_oper_vht_cap, ht_oper,
224 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
226 "HE AP VHT information is invalid, disable HE\n");
227 ret = IEEE80211_STA_DISABLE_HE;
230 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
231 ht_oper, &vht_chandef)) {
232 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
234 "AP VHT information is invalid, disable VHT\n");
235 ret = IEEE80211_STA_DISABLE_VHT;
239 if (!cfg80211_chandef_valid(&vht_chandef)) {
240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
242 "AP VHT information is invalid, disable VHT\n");
243 ret = IEEE80211_STA_DISABLE_VHT;
247 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
252 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
253 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
255 "AP VHT information doesn't match HT, disable VHT\n");
256 ret = IEEE80211_STA_DISABLE_VHT;
260 *chandef = vht_chandef;
266 * When tracking the current AP, don't do any further checks if the
267 * new chandef is identical to the one we're currently using for the
268 * connection. This keeps us from playing ping-pong with regulatory,
269 * without it the following can happen (for example):
270 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
271 * - AP advertises regdom US
272 * - CRDA loads regdom US with 80 MHz prohibited (old database)
273 * - the code below detects an unsupported channel, downgrades, and
274 * we disconnect from the AP in the caller
275 * - disconnect causes CRDA to reload world regdomain and the game
277 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
279 * It seems possible that there are still scenarios with CSA or real
280 * bandwidth changes where a this could happen, but those cases are
281 * less common and wouldn't completely prevent using the AP.
284 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
287 /* don't print the message below for VHT mismatch if VHT is disabled */
288 if (ret & IEEE80211_STA_DISABLE_VHT)
289 vht_chandef = *chandef;
292 * Ignore the DISABLED flag when we're already connected and only
293 * tracking the APs beacon for bandwidth changes - otherwise we
294 * might get disconnected here if we connect to an AP, update our
295 * regulatory information based on the AP's country IE and the
296 * information we have is wrong/outdated and disables the channel
297 * that we're actually using for the connection to the AP.
299 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
301 IEEE80211_CHAN_DISABLED)) {
302 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
303 ret = IEEE80211_STA_DISABLE_HT |
304 IEEE80211_STA_DISABLE_VHT;
308 ret |= ieee80211_chandef_downgrade(chandef);
311 if (chandef->width != vht_chandef.width && !tracking)
313 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
315 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
319 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
320 struct sta_info *sta,
321 const struct ieee80211_ht_cap *ht_cap,
322 const struct ieee80211_ht_operation *ht_oper,
323 const struct ieee80211_vht_operation *vht_oper,
324 const struct ieee80211_he_operation *he_oper,
325 const u8 *bssid, u32 *changed)
327 struct ieee80211_local *local = sdata->local;
328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
329 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
330 struct ieee80211_supported_band *sband =
331 local->hw.wiphy->bands[chan->band];
332 struct cfg80211_chan_def chandef;
335 enum ieee80211_sta_rx_bandwidth new_sta_bw;
338 /* if HT was/is disabled, don't track any bandwidth changes */
339 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
342 /* don't check VHT if we associated as non-VHT station */
343 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
346 /* don't check HE if we associated as non-HE station */
347 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
348 !ieee80211_get_he_sta_cap(sband))
351 if (WARN_ON_ONCE(!sta))
355 * if bss configuration changed store the new one -
356 * this may be applicable even if channel is identical
358 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
359 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
360 *changed |= BSS_CHANGED_HT;
361 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
364 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
365 flags = ieee80211_determine_chantype(sdata, sband, chan,
366 ht_oper, vht_oper, he_oper,
370 * Downgrade the new channel if we associated with restricted
371 * capabilities. For example, if we associated as a 20 MHz STA
372 * to a 40 MHz AP (due to regulatory, capabilities or config
373 * reasons) then switching to a 40 MHz channel now won't do us
374 * any good -- we couldn't use it with the AP.
376 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
377 chandef.width == NL80211_CHAN_WIDTH_80P80)
378 flags |= ieee80211_chandef_downgrade(&chandef);
379 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
380 chandef.width == NL80211_CHAN_WIDTH_160)
381 flags |= ieee80211_chandef_downgrade(&chandef);
382 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
383 chandef.width > NL80211_CHAN_WIDTH_20)
384 flags |= ieee80211_chandef_downgrade(&chandef);
386 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
390 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
391 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
392 chandef.center_freq1, chandef.center_freq2);
394 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
395 IEEE80211_STA_DISABLE_VHT |
396 IEEE80211_STA_DISABLE_40MHZ |
397 IEEE80211_STA_DISABLE_80P80MHZ |
398 IEEE80211_STA_DISABLE_160MHZ)) ||
399 !cfg80211_chandef_valid(&chandef)) {
401 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
406 switch (chandef.width) {
407 case NL80211_CHAN_WIDTH_20_NOHT:
408 case NL80211_CHAN_WIDTH_20:
409 new_sta_bw = IEEE80211_STA_RX_BW_20;
411 case NL80211_CHAN_WIDTH_40:
412 new_sta_bw = IEEE80211_STA_RX_BW_40;
414 case NL80211_CHAN_WIDTH_80:
415 new_sta_bw = IEEE80211_STA_RX_BW_80;
417 case NL80211_CHAN_WIDTH_80P80:
418 case NL80211_CHAN_WIDTH_160:
419 new_sta_bw = IEEE80211_STA_RX_BW_160;
425 if (new_sta_bw > sta->cur_max_bandwidth)
426 new_sta_bw = sta->cur_max_bandwidth;
428 if (new_sta_bw < sta->sta.bandwidth) {
429 sta->sta.bandwidth = new_sta_bw;
430 rate_control_rate_update(local, sband, sta,
431 IEEE80211_RC_BW_CHANGED);
434 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
437 "AP %pM changed bandwidth to incompatible one - disconnect\n",
442 if (new_sta_bw > sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
451 /* frame sending functions */
453 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
454 struct sk_buff *skb, u8 ap_ht_param,
455 struct ieee80211_supported_band *sband,
456 struct ieee80211_channel *channel,
457 enum ieee80211_smps_mode smps)
460 u32 flags = channel->flags;
462 struct ieee80211_sta_ht_cap ht_cap;
464 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
466 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
467 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
469 /* determine capability flags */
472 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
473 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
474 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
475 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
476 cap &= ~IEEE80211_HT_CAP_SGI_40;
479 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
480 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
481 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
482 cap &= ~IEEE80211_HT_CAP_SGI_40;
488 * If 40 MHz was disabled associate as though we weren't
489 * capable of 40 MHz -- some broken APs will never fall
490 * back to trying to transmit in 20 MHz.
492 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
494 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 /* set SM PS mode properly */
498 cap &= ~IEEE80211_HT_CAP_SM_PS;
500 case IEEE80211_SMPS_AUTOMATIC:
501 case IEEE80211_SMPS_NUM_MODES:
504 case IEEE80211_SMPS_OFF:
505 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
506 IEEE80211_HT_CAP_SM_PS_SHIFT;
508 case IEEE80211_SMPS_STATIC:
509 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
510 IEEE80211_HT_CAP_SM_PS_SHIFT;
512 case IEEE80211_SMPS_DYNAMIC:
513 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
514 IEEE80211_HT_CAP_SM_PS_SHIFT;
518 /* reserve and fill IE */
519 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
520 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
523 /* This function determines vht capability flags for the association
525 * Note - the function may set the owner of the MU-MIMO capability
527 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
529 struct ieee80211_supported_band *sband,
530 struct ieee80211_vht_cap *ap_vht_cap)
532 struct ieee80211_local *local = sdata->local;
535 struct ieee80211_sta_vht_cap vht_cap;
536 u32 mask, ap_bf_sts, our_bf_sts;
538 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
540 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
541 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
543 /* determine capability flags */
546 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
547 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
549 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
550 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
551 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
552 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
555 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
556 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
557 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561 * Some APs apparently get confused if our capabilities are better
562 * than theirs, so restrict what we advertise in the assoc request.
564 if (!(ap_vht_cap->vht_cap_info &
565 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
566 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
567 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
568 else if (!(ap_vht_cap->vht_cap_info &
569 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
573 * If some other vif is using the MU-MIMO capablity we cannot associate
574 * using MU-MIMO - this will lead to contradictions in the group-id
576 * Ownership is defined since association request, in order to avoid
577 * simultaneous associations with MU-MIMO.
579 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
580 bool disable_mu_mimo = false;
581 struct ieee80211_sub_if_data *other;
583 list_for_each_entry_rcu(other, &local->interfaces, list) {
584 if (other->vif.mu_mimo_owner) {
585 disable_mu_mimo = true;
590 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
592 sdata->vif.mu_mimo_owner = true;
595 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
597 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
598 our_bf_sts = cap & mask;
600 if (ap_bf_sts < our_bf_sts) {
605 /* reserve and fill IE */
606 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
607 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
610 /* This function determines HE capability flags for the association
613 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
615 struct ieee80211_supported_band *sband)
618 const struct ieee80211_sta_he_cap *he_cap = NULL;
621 he_cap = ieee80211_get_he_sta_cap(sband);
626 * TODO: the 1 added is because this temporarily is under the EXTENSION
627 * IE. Get rid of it when it moves.
630 2 + 1 + sizeof(he_cap->he_cap_elem) +
631 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
632 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
633 he_cap->he_cap_elem.phy_cap_info);
634 pos = skb_put(skb, he_cap_size);
635 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
638 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
640 struct ieee80211_local *local = sdata->local;
641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
642 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
644 struct ieee80211_mgmt *mgmt;
645 u8 *pos, qos_info, *ie_start;
646 size_t offset = 0, noffset;
647 int i, count, rates_len, supp_rates_len, shift;
649 struct ieee80211_supported_band *sband;
650 struct ieee80211_chanctx_conf *chanctx_conf;
651 struct ieee80211_channel *chan;
654 sdata_assert_lock(sdata);
657 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
658 if (WARN_ON(!chanctx_conf)) {
662 chan = chanctx_conf->def.chan;
664 sband = local->hw.wiphy->bands[chan->band];
665 shift = ieee80211_vif_get_shift(&sdata->vif);
667 if (assoc_data->supp_rates_len) {
669 * Get all rates supported by the device and the AP as
670 * some APs don't like getting a superset of their rates
671 * in the association request (e.g. D-Link DAP 1353 in
674 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
675 assoc_data->supp_rates,
676 assoc_data->supp_rates_len,
680 * In case AP not provide any supported rates information
681 * before association, we send information element(s) with
682 * all rates that we support.
685 for (i = 0; i < sband->n_bitrates; i++) {
691 skb = alloc_skb(local->hw.extra_tx_headroom +
692 sizeof(*mgmt) + /* bit too much but doesn't matter */
693 2 + assoc_data->ssid_len + /* SSID */
694 4 + rates_len + /* (extended) rates */
695 4 + /* power capability */
696 2 + 2 * sband->n_channels + /* supported channels */
697 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
698 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
699 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
700 sizeof(struct ieee80211_he_mcs_nss_supp) +
701 IEEE80211_HE_PPE_THRES_MAX_LEN +
702 assoc_data->ie_len + /* extra IEs */
703 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
709 skb_reserve(skb, local->hw.extra_tx_headroom);
711 capab = WLAN_CAPABILITY_ESS;
713 if (sband->band == NL80211_BAND_2GHZ) {
714 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
715 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
718 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
719 capab |= WLAN_CAPABILITY_PRIVACY;
721 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
722 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
723 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
725 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
726 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
728 mgmt = skb_put_zero(skb, 24);
729 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
730 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
731 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
733 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
735 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
736 IEEE80211_STYPE_REASSOC_REQ);
737 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
738 mgmt->u.reassoc_req.listen_interval =
739 cpu_to_le16(local->hw.conf.listen_interval);
740 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
744 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
745 IEEE80211_STYPE_ASSOC_REQ);
746 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
747 mgmt->u.assoc_req.listen_interval =
748 cpu_to_le16(local->hw.conf.listen_interval);
752 pos = skb_put(skb, 2 + assoc_data->ssid_len);
754 *pos++ = WLAN_EID_SSID;
755 *pos++ = assoc_data->ssid_len;
756 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
758 /* add all rates which were marked to be used above */
759 supp_rates_len = rates_len;
760 if (supp_rates_len > 8)
763 pos = skb_put(skb, supp_rates_len + 2);
764 *pos++ = WLAN_EID_SUPP_RATES;
765 *pos++ = supp_rates_len;
768 for (i = 0; i < sband->n_bitrates; i++) {
769 if (BIT(i) & rates) {
770 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
778 if (rates_len > count) {
779 pos = skb_put(skb, rates_len - count + 2);
780 *pos++ = WLAN_EID_EXT_SUPP_RATES;
781 *pos++ = rates_len - count;
783 for (i++; i < sband->n_bitrates; i++) {
784 if (BIT(i) & rates) {
786 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
793 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
794 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
795 pos = skb_put(skb, 4);
796 *pos++ = WLAN_EID_PWR_CAPABILITY;
798 *pos++ = 0; /* min tx power */
800 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
803 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
804 /* TODO: get this in reg domain format */
805 pos = skb_put(skb, 2 * sband->n_channels + 2);
806 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
807 *pos++ = 2 * sband->n_channels;
808 for (i = 0; i < sband->n_channels; i++) {
809 *pos++ = ieee80211_frequency_to_channel(
810 sband->channels[i].center_freq);
811 *pos++ = 1; /* one channel in the subband*/
815 /* Set MBSSID support for HE AP if needed */
816 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
817 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) {
818 struct element *elem;
820 /* we know it's writable, cast away the const */
821 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
825 /* We can probably assume both always true */
826 if (elem && elem->datalen >= 3)
827 elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
830 /* if present, add any custom IEs that go before HT */
831 if (assoc_data->ie_len) {
832 static const u8 before_ht[] = {
835 WLAN_EID_EXT_SUPP_RATES,
836 WLAN_EID_PWR_CAPABILITY,
837 WLAN_EID_SUPPORTED_CHANNELS,
840 WLAN_EID_RRM_ENABLED_CAPABILITIES,
841 WLAN_EID_MOBILITY_DOMAIN,
842 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
843 WLAN_EID_RIC_DATA, /* reassoc only */
844 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
846 static const u8 after_ric[] = {
847 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
848 WLAN_EID_HT_CAPABILITY,
849 WLAN_EID_BSS_COEX_2040,
850 /* luckily this is almost always there */
851 WLAN_EID_EXT_CAPABILITY,
852 WLAN_EID_QOS_TRAFFIC_CAPA,
853 WLAN_EID_TIM_BCAST_REQ,
854 WLAN_EID_INTERWORKING,
855 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
856 WLAN_EID_VHT_CAPABILITY,
857 WLAN_EID_OPMODE_NOTIF,
860 noffset = ieee80211_ie_split_ric(assoc_data->ie,
863 ARRAY_SIZE(before_ht),
865 ARRAY_SIZE(after_ric),
867 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
871 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
872 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
873 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
875 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
876 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
877 sband, chan, sdata->smps_mode);
879 /* if present, add any custom IEs that go before VHT */
880 if (assoc_data->ie_len) {
881 static const u8 before_vht[] = {
883 * no need to list the ones split off before HT
886 WLAN_EID_BSS_COEX_2040,
887 WLAN_EID_EXT_CAPABILITY,
888 WLAN_EID_QOS_TRAFFIC_CAPA,
889 WLAN_EID_TIM_BCAST_REQ,
890 WLAN_EID_INTERWORKING,
891 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
894 /* RIC already taken above, so no need to handle here anymore */
895 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
896 before_vht, ARRAY_SIZE(before_vht),
898 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
902 /* if present, add any custom IEs that go before HE */
903 if (assoc_data->ie_len) {
904 static const u8 before_he[] = {
906 * no need to list the ones split off before VHT
909 WLAN_EID_OPMODE_NOTIF,
910 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
912 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
913 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
914 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
915 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
916 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
917 /* TODO: add 11ah/11aj/11ak elements */
920 /* RIC already taken above, so no need to handle here anymore */
921 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
922 before_he, ARRAY_SIZE(before_he),
924 pos = skb_put(skb, noffset - offset);
925 memcpy(pos, assoc_data->ie + offset, noffset - offset);
929 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
930 ieee80211_add_vht_ie(sdata, skb, sband,
931 &assoc_data->ap_vht_cap);
934 * If AP doesn't support HT, mark HE as disabled.
935 * If on the 5GHz band, make sure it supports VHT.
937 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
938 (sband->band == NL80211_BAND_5GHZ &&
939 ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
940 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
942 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
943 ieee80211_add_he_ie(sdata, skb, sband);
945 /* if present, add any custom non-vendor IEs that go after HE */
946 if (assoc_data->ie_len) {
947 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
950 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
954 if (assoc_data->wmm) {
955 if (assoc_data->uapsd) {
956 qos_info = ifmgd->uapsd_queues;
957 qos_info |= (ifmgd->uapsd_max_sp_len <<
958 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
963 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
966 /* add any remaining custom (i.e. vendor specific here) IEs */
967 if (assoc_data->ie_len) {
968 noffset = assoc_data->ie_len;
969 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
972 if (assoc_data->fils_kek_len &&
973 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
978 pos = skb_tail_pointer(skb);
979 kfree(ifmgd->assoc_req_ies);
980 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
981 ifmgd->assoc_req_ies_len = pos - ie_start;
983 drv_mgd_prepare_tx(local, sdata, 0);
985 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
986 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
987 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
988 IEEE80211_TX_INTFL_MLME_CONN_TX;
989 ieee80211_tx_skb(sdata, skb);
992 void ieee80211_send_pspoll(struct ieee80211_local *local,
993 struct ieee80211_sub_if_data *sdata)
995 struct ieee80211_pspoll *pspoll;
998 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1002 pspoll = (struct ieee80211_pspoll *) skb->data;
1003 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1005 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1006 ieee80211_tx_skb(sdata, skb);
1009 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1010 struct ieee80211_sub_if_data *sdata,
1013 struct sk_buff *skb;
1014 struct ieee80211_hdr_3addr *nullfunc;
1015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1017 /* Don't send NDPs when STA is connected HE */
1018 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1019 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1022 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1023 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1027 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1029 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1031 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1032 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1034 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1035 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1037 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1038 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1040 ieee80211_tx_skb(sdata, skb);
1043 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1044 struct ieee80211_sub_if_data *sdata)
1046 struct sk_buff *skb;
1047 struct ieee80211_hdr *nullfunc;
1050 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1053 /* Don't send NDPs when connected HE */
1054 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1057 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1061 skb_reserve(skb, local->hw.extra_tx_headroom);
1063 nullfunc = skb_put_zero(skb, 30);
1064 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1065 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1066 nullfunc->frame_control = fc;
1067 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1068 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1069 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1070 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1072 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1073 ieee80211_tx_skb(sdata, skb);
1076 /* spectrum management related things */
1077 static void ieee80211_chswitch_work(struct work_struct *work)
1079 struct ieee80211_sub_if_data *sdata =
1080 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1081 struct ieee80211_local *local = sdata->local;
1082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1085 if (!ieee80211_sdata_running(sdata))
1089 mutex_lock(&local->mtx);
1090 mutex_lock(&local->chanctx_mtx);
1092 if (!ifmgd->associated)
1095 if (!sdata->vif.csa_active)
1099 * using reservation isn't immediate as it may be deferred until later
1100 * with multi-vif. once reservation is complete it will re-schedule the
1101 * work with no reserved_chanctx so verify chandef to check if it
1102 * completed successfully
1105 if (sdata->reserved_chanctx) {
1106 struct ieee80211_supported_band *sband = NULL;
1107 struct sta_info *mgd_sta = NULL;
1108 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1111 * with multi-vif csa driver may call ieee80211_csa_finish()
1112 * many times while waiting for other interfaces to use their
1115 if (sdata->reserved_ready)
1118 if (sdata->vif.bss_conf.chandef.width !=
1119 sdata->csa_chandef.width) {
1121 * For managed interface, we need to also update the AP
1122 * station bandwidth and align the rate scale algorithm
1123 * on the bandwidth change. Here we only consider the
1124 * bandwidth of the new channel definition (as channel
1125 * switch flow does not have the full HT/VHT/HE
1126 * information), assuming that if additional changes are
1127 * required they would be done as part of the processing
1128 * of the next beacon from the AP.
1130 switch (sdata->csa_chandef.width) {
1131 case NL80211_CHAN_WIDTH_20_NOHT:
1132 case NL80211_CHAN_WIDTH_20:
1134 bw = IEEE80211_STA_RX_BW_20;
1136 case NL80211_CHAN_WIDTH_40:
1137 bw = IEEE80211_STA_RX_BW_40;
1139 case NL80211_CHAN_WIDTH_80:
1140 bw = IEEE80211_STA_RX_BW_80;
1142 case NL80211_CHAN_WIDTH_80P80:
1143 case NL80211_CHAN_WIDTH_160:
1144 bw = IEEE80211_STA_RX_BW_160;
1148 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1150 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1153 if (sdata->vif.bss_conf.chandef.width >
1154 sdata->csa_chandef.width) {
1155 mgd_sta->sta.bandwidth = bw;
1156 rate_control_rate_update(local, sband, mgd_sta,
1157 IEEE80211_RC_BW_CHANGED);
1160 ret = ieee80211_vif_use_reserved_context(sdata);
1163 "failed to use reserved channel context, disconnecting (err=%d)\n",
1165 ieee80211_queue_work(&sdata->local->hw,
1166 &ifmgd->csa_connection_drop_work);
1170 if (sdata->vif.bss_conf.chandef.width <
1171 sdata->csa_chandef.width) {
1172 mgd_sta->sta.bandwidth = bw;
1173 rate_control_rate_update(local, sband, mgd_sta,
1174 IEEE80211_RC_BW_CHANGED);
1180 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1181 &sdata->csa_chandef)) {
1183 "failed to finalize channel switch, disconnecting\n");
1184 ieee80211_queue_work(&sdata->local->hw,
1185 &ifmgd->csa_connection_drop_work);
1189 ifmgd->csa_waiting_bcn = true;
1191 ieee80211_sta_reset_beacon_monitor(sdata);
1192 ieee80211_sta_reset_conn_monitor(sdata);
1195 mutex_unlock(&local->chanctx_mtx);
1196 mutex_unlock(&local->mtx);
1197 sdata_unlock(sdata);
1200 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1202 struct ieee80211_local *local = sdata->local;
1203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1206 sdata_assert_lock(sdata);
1208 WARN_ON(!sdata->vif.csa_active);
1210 if (sdata->csa_block_tx) {
1211 ieee80211_wake_vif_queues(local, sdata,
1212 IEEE80211_QUEUE_STOP_REASON_CSA);
1213 sdata->csa_block_tx = false;
1216 sdata->vif.csa_active = false;
1217 ifmgd->csa_waiting_bcn = false;
1219 ret = drv_post_channel_switch(sdata);
1222 "driver post channel switch failed, disconnecting\n");
1223 ieee80211_queue_work(&local->hw,
1224 &ifmgd->csa_connection_drop_work);
1228 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1231 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1233 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1236 trace_api_chswitch_done(sdata, success);
1239 "driver channel switch failed, disconnecting\n");
1240 ieee80211_queue_work(&sdata->local->hw,
1241 &ifmgd->csa_connection_drop_work);
1243 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1246 EXPORT_SYMBOL(ieee80211_chswitch_done);
1248 static void ieee80211_chswitch_timer(struct timer_list *t)
1250 struct ieee80211_sub_if_data *sdata =
1251 from_timer(sdata, t, u.mgd.chswitch_timer);
1253 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1257 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1259 struct ieee80211_local *local = sdata->local;
1261 if (!local->ops->abort_channel_switch)
1264 mutex_lock(&local->mtx);
1266 mutex_lock(&local->chanctx_mtx);
1267 ieee80211_vif_unreserve_chanctx(sdata);
1268 mutex_unlock(&local->chanctx_mtx);
1270 if (sdata->csa_block_tx)
1271 ieee80211_wake_vif_queues(local, sdata,
1272 IEEE80211_QUEUE_STOP_REASON_CSA);
1274 sdata->csa_block_tx = false;
1275 sdata->vif.csa_active = false;
1277 mutex_unlock(&local->mtx);
1279 drv_abort_channel_switch(sdata);
1283 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1284 u64 timestamp, u32 device_timestamp,
1285 struct ieee802_11_elems *elems,
1288 struct ieee80211_local *local = sdata->local;
1289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1290 struct cfg80211_bss *cbss = ifmgd->associated;
1291 struct ieee80211_chanctx_conf *conf;
1292 struct ieee80211_chanctx *chanctx;
1293 enum nl80211_band current_band;
1294 struct ieee80211_csa_ie csa_ie;
1295 struct ieee80211_channel_switch ch_switch;
1298 sdata_assert_lock(sdata);
1303 if (local->scanning)
1306 current_band = cbss->channel->band;
1307 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1309 ifmgd->associated->bssid, &csa_ie);
1312 ch_switch.timestamp = timestamp;
1313 ch_switch.device_timestamp = device_timestamp;
1314 ch_switch.block_tx = beacon ? csa_ie.mode : 0;
1315 ch_switch.chandef = csa_ie.chandef;
1316 ch_switch.count = csa_ie.count;
1317 ch_switch.delay = csa_ie.max_switch_time;
1321 ieee80211_queue_work(&local->hw,
1322 &ifmgd->csa_connection_drop_work);
1326 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1328 ieee80211_sta_abort_chanswitch(sdata);
1330 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1332 } else if (sdata->vif.csa_active || res) {
1333 /* disregard subsequent announcements if already processing */
1337 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1338 IEEE80211_CHAN_DISABLED)) {
1340 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1341 ifmgd->associated->bssid,
1342 csa_ie.chandef.chan->center_freq,
1343 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1344 csa_ie.chandef.center_freq2);
1345 ieee80211_queue_work(&local->hw,
1346 &ifmgd->csa_connection_drop_work);
1350 if (cfg80211_chandef_identical(&csa_ie.chandef,
1351 &sdata->vif.bss_conf.chandef) &&
1352 (!csa_ie.mode || !beacon)) {
1353 if (ifmgd->csa_ignored_same_chan)
1356 "AP %pM tries to chanswitch to same channel, ignore\n",
1357 ifmgd->associated->bssid);
1358 ifmgd->csa_ignored_same_chan = true;
1363 * Drop all TDLS peers - either we disconnect or move to a different
1364 * channel from this point on. There's no telling what our peer will do.
1365 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1366 * have an incompatible wider chandef.
1368 ieee80211_teardown_tdls_peers(sdata);
1370 mutex_lock(&local->mtx);
1371 mutex_lock(&local->chanctx_mtx);
1372 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1373 lockdep_is_held(&local->chanctx_mtx));
1376 "no channel context assigned to vif?, disconnecting\n");
1377 goto drop_connection;
1380 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1382 if (local->use_chanctx &&
1383 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1385 "driver doesn't support chan-switch with channel contexts\n");
1386 goto drop_connection;
1389 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1391 "preparing for channel switch failed, disconnecting\n");
1392 goto drop_connection;
1395 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1396 chanctx->mode, false);
1399 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1401 goto drop_connection;
1403 mutex_unlock(&local->chanctx_mtx);
1405 sdata->vif.csa_active = true;
1406 sdata->csa_chandef = csa_ie.chandef;
1407 sdata->csa_block_tx = ch_switch.block_tx;
1408 ifmgd->csa_ignored_same_chan = false;
1410 if (sdata->csa_block_tx)
1411 ieee80211_stop_vif_queues(local, sdata,
1412 IEEE80211_QUEUE_STOP_REASON_CSA);
1413 mutex_unlock(&local->mtx);
1415 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1418 if (local->ops->channel_switch) {
1419 /* use driver's channel switch callback */
1420 drv_channel_switch(local, sdata, &ch_switch);
1424 /* channel switch handled in software */
1425 if (csa_ie.count <= 1)
1426 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1428 mod_timer(&ifmgd->chswitch_timer,
1429 TU_TO_EXP_TIME((csa_ie.count - 1) *
1430 cbss->beacon_interval));
1434 * This is just so that the disconnect flow will know that
1435 * we were trying to switch channel and failed. In case the
1436 * mode is 1 (we are not allowed to Tx), we will know not to
1437 * send a deauthentication frame. Those two fields will be
1438 * reset when the disconnection worker runs.
1440 sdata->vif.csa_active = true;
1441 sdata->csa_block_tx = ch_switch.block_tx;
1443 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1444 mutex_unlock(&local->chanctx_mtx);
1445 mutex_unlock(&local->mtx);
1449 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1450 struct ieee80211_channel *channel,
1451 const u8 *country_ie, u8 country_ie_len,
1452 const u8 *pwr_constr_elem,
1453 int *chan_pwr, int *pwr_reduction)
1455 struct ieee80211_country_ie_triplet *triplet;
1456 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1457 int i, chan_increment;
1458 bool have_chan_pwr = false;
1461 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1464 triplet = (void *)(country_ie + 3);
1465 country_ie_len -= 3;
1467 switch (channel->band) {
1471 case NL80211_BAND_2GHZ:
1472 case NL80211_BAND_60GHZ:
1475 case NL80211_BAND_5GHZ:
1481 while (country_ie_len >= 3) {
1482 u8 first_channel = triplet->chans.first_channel;
1484 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1487 for (i = 0; i < triplet->chans.num_channels; i++) {
1488 if (first_channel + i * chan_increment == chan) {
1489 have_chan_pwr = true;
1490 *chan_pwr = triplet->chans.max_power;
1499 country_ie_len -= 3;
1502 if (have_chan_pwr && pwr_constr_elem)
1503 *pwr_reduction = *pwr_constr_elem;
1507 return have_chan_pwr;
1510 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1511 struct ieee80211_channel *channel,
1512 const u8 *cisco_dtpc_ie,
1515 /* From practical testing, the first data byte of the DTPC element
1516 * seems to contain the requested dBm level, and the CLI on Cisco
1517 * APs clearly state the range is -127 to 127 dBm, which indicates
1518 * a signed byte, although it seemingly never actually goes negative.
1519 * The other byte seems to always be zero.
1521 *pwr_level = (__s8)cisco_dtpc_ie[4];
1524 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1525 struct ieee80211_channel *channel,
1526 struct ieee80211_mgmt *mgmt,
1527 const u8 *country_ie, u8 country_ie_len,
1528 const u8 *pwr_constr_ie,
1529 const u8 *cisco_dtpc_ie)
1531 bool has_80211h_pwr = false, has_cisco_pwr = false;
1532 int chan_pwr = 0, pwr_reduction_80211h = 0;
1533 int pwr_level_cisco, pwr_level_80211h;
1535 __le16 capab = mgmt->u.probe_resp.capab_info;
1538 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1539 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1540 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1541 sdata, channel, country_ie, country_ie_len,
1542 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1544 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1547 if (cisco_dtpc_ie) {
1548 ieee80211_find_cisco_dtpc(
1549 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1550 has_cisco_pwr = true;
1553 if (!has_80211h_pwr && !has_cisco_pwr)
1556 /* If we have both 802.11h and Cisco DTPC, apply both limits
1557 * by picking the smallest of the two power levels advertised.
1559 if (has_80211h_pwr &&
1560 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1561 new_ap_level = pwr_level_80211h;
1563 if (sdata->ap_power_level == new_ap_level)
1567 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1568 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1569 sdata->u.mgd.bssid);
1570 } else { /* has_cisco_pwr is always true here. */
1571 new_ap_level = pwr_level_cisco;
1573 if (sdata->ap_power_level == new_ap_level)
1577 "Limiting TX power to %d dBm as advertised by %pM\n",
1578 pwr_level_cisco, sdata->u.mgd.bssid);
1581 sdata->ap_power_level = new_ap_level;
1582 if (__ieee80211_recalc_txpower(sdata))
1583 return BSS_CHANGED_TXPOWER;
1588 static void ieee80211_enable_ps(struct ieee80211_local *local,
1589 struct ieee80211_sub_if_data *sdata)
1591 struct ieee80211_conf *conf = &local->hw.conf;
1594 * If we are scanning right now then the parameters will
1595 * take effect when scan finishes.
1597 if (local->scanning)
1600 if (conf->dynamic_ps_timeout > 0 &&
1601 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1602 mod_timer(&local->dynamic_ps_timer, jiffies +
1603 msecs_to_jiffies(conf->dynamic_ps_timeout));
1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1606 ieee80211_send_nullfunc(local, sdata, true);
1608 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1609 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1612 conf->flags |= IEEE80211_CONF_PS;
1613 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1617 static void ieee80211_change_ps(struct ieee80211_local *local)
1619 struct ieee80211_conf *conf = &local->hw.conf;
1621 if (local->ps_sdata) {
1622 ieee80211_enable_ps(local, local->ps_sdata);
1623 } else if (conf->flags & IEEE80211_CONF_PS) {
1624 conf->flags &= ~IEEE80211_CONF_PS;
1625 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1626 del_timer_sync(&local->dynamic_ps_timer);
1627 cancel_work_sync(&local->dynamic_ps_enable_work);
1631 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1633 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1634 struct sta_info *sta = NULL;
1635 bool authorized = false;
1637 if (!mgd->powersave)
1643 if (!mgd->associated)
1646 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1649 if (!mgd->have_beacon)
1653 sta = sta_info_get(sdata, mgd->bssid);
1655 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1661 /* need to hold RTNL or interface lock */
1662 void ieee80211_recalc_ps(struct ieee80211_local *local)
1664 struct ieee80211_sub_if_data *sdata, *found = NULL;
1668 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1669 local->ps_sdata = NULL;
1673 list_for_each_entry(sdata, &local->interfaces, list) {
1674 if (!ieee80211_sdata_running(sdata))
1676 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1677 /* If an AP vif is found, then disable PS
1678 * by setting the count to zero thereby setting
1684 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1690 if (count == 1 && ieee80211_powersave_allowed(found)) {
1691 u8 dtimper = found->u.mgd.dtim_period;
1693 timeout = local->dynamic_ps_forced_timeout;
1696 local->hw.conf.dynamic_ps_timeout = timeout;
1698 /* If the TIM IE is invalid, pretend the value is 1 */
1702 local->hw.conf.ps_dtim_period = dtimper;
1703 local->ps_sdata = found;
1705 local->ps_sdata = NULL;
1708 ieee80211_change_ps(local);
1711 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1713 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1715 if (sdata->vif.bss_conf.ps != ps_allowed) {
1716 sdata->vif.bss_conf.ps = ps_allowed;
1717 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1721 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1723 struct ieee80211_local *local =
1724 container_of(work, struct ieee80211_local,
1725 dynamic_ps_disable_work);
1727 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1728 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1729 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1732 ieee80211_wake_queues_by_reason(&local->hw,
1733 IEEE80211_MAX_QUEUE_MAP,
1734 IEEE80211_QUEUE_STOP_REASON_PS,
1738 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1740 struct ieee80211_local *local =
1741 container_of(work, struct ieee80211_local,
1742 dynamic_ps_enable_work);
1743 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1744 struct ieee80211_if_managed *ifmgd;
1745 unsigned long flags;
1748 /* can only happen when PS was just disabled anyway */
1752 ifmgd = &sdata->u.mgd;
1754 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1757 if (local->hw.conf.dynamic_ps_timeout > 0) {
1758 /* don't enter PS if TX frames are pending */
1759 if (drv_tx_frames_pending(local)) {
1760 mod_timer(&local->dynamic_ps_timer, jiffies +
1762 local->hw.conf.dynamic_ps_timeout));
1767 * transmission can be stopped by others which leads to
1768 * dynamic_ps_timer expiry. Postpone the ps timer if it
1769 * is not the actual idle state.
1771 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1772 for (q = 0; q < local->hw.queues; q++) {
1773 if (local->queue_stop_reasons[q]) {
1774 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1776 mod_timer(&local->dynamic_ps_timer, jiffies +
1778 local->hw.conf.dynamic_ps_timeout));
1782 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1785 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1786 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1787 if (drv_tx_frames_pending(local)) {
1788 mod_timer(&local->dynamic_ps_timer, jiffies +
1790 local->hw.conf.dynamic_ps_timeout));
1792 ieee80211_send_nullfunc(local, sdata, true);
1793 /* Flush to get the tx status of nullfunc frame */
1794 ieee80211_flush_queues(local, sdata, false);
1798 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1799 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1800 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1801 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1802 local->hw.conf.flags |= IEEE80211_CONF_PS;
1803 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1807 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1809 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1811 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1814 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1816 struct delayed_work *delayed_work = to_delayed_work(work);
1817 struct ieee80211_sub_if_data *sdata =
1818 container_of(delayed_work, struct ieee80211_sub_if_data,
1819 dfs_cac_timer_work);
1820 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1822 mutex_lock(&sdata->local->mtx);
1823 if (sdata->wdev.cac_started) {
1824 ieee80211_vif_release_channel(sdata);
1825 cfg80211_cac_event(sdata->dev, &chandef,
1826 NL80211_RADAR_CAC_FINISHED,
1829 mutex_unlock(&sdata->local->mtx);
1833 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1835 struct ieee80211_local *local = sdata->local;
1836 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1840 if (local->hw.queues < IEEE80211_NUM_ACS)
1843 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1844 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1846 unsigned long now = jiffies;
1848 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1849 tx_tspec->admitted_time &&
1850 time_after(now, tx_tspec->time_slice_start + HZ)) {
1851 tx_tspec->consumed_tx_time = 0;
1852 tx_tspec->time_slice_start = now;
1854 if (tx_tspec->downgraded)
1856 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1859 switch (tx_tspec->action) {
1860 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1861 /* take the original parameters */
1862 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1864 "failed to set TX queue parameters for queue %d\n",
1866 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1867 tx_tspec->downgraded = false;
1870 case TX_TSPEC_ACTION_DOWNGRADE:
1871 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1872 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1876 /* downgrade next lower non-ACM AC */
1877 for (non_acm_ac = ac + 1;
1878 non_acm_ac < IEEE80211_NUM_ACS;
1880 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1882 /* Usually the loop will result in using BK even if it
1883 * requires admission control, but such a configuration
1884 * makes no sense and we have to transmit somehow - the
1885 * AC selection does the same thing.
1886 * If we started out trying to downgrade from BK, then
1887 * the extra condition here might be needed.
1889 if (non_acm_ac >= IEEE80211_NUM_ACS)
1890 non_acm_ac = IEEE80211_AC_BK;
1891 if (drv_conf_tx(local, sdata, ac,
1892 &sdata->tx_conf[non_acm_ac]))
1894 "failed to set TX queue parameters for queue %d\n",
1896 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1898 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1899 tx_tspec->time_slice_start + HZ - now + 1);
1901 case TX_TSPEC_ACTION_NONE:
1910 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1912 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1913 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1916 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1918 struct ieee80211_sub_if_data *sdata;
1920 sdata = container_of(work, struct ieee80211_sub_if_data,
1921 u.mgd.tx_tspec_wk.work);
1922 ieee80211_sta_handle_tspec_ac_params(sdata);
1927 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1928 struct ieee80211_sub_if_data *sdata,
1929 const u8 *wmm_param, size_t wmm_param_len,
1930 const struct ieee80211_mu_edca_param_set *mu_edca)
1932 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1935 int count, mu_edca_count, ac;
1937 u8 uapsd_queues = 0;
1939 if (!local->ops->conf_tx)
1942 if (local->hw.queues < IEEE80211_NUM_ACS)
1948 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1951 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1952 uapsd_queues = ifmgd->uapsd_queues;
1954 count = wmm_param[6] & 0x0f;
1955 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1956 * if mu_edca was preset before and now it disappeared tell
1957 * the driver about it.
1959 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1960 if (count == ifmgd->wmm_last_param_set &&
1961 mu_edca_count == ifmgd->mu_edca_last_param_set)
1963 ifmgd->wmm_last_param_set = count;
1964 ifmgd->mu_edca_last_param_set = mu_edca_count;
1966 pos = wmm_param + 8;
1967 left = wmm_param_len - 8;
1969 memset(¶ms, 0, sizeof(params));
1972 for (; left >= 4; left -= 4, pos += 4) {
1973 int aci = (pos[0] >> 5) & 0x03;
1974 int acm = (pos[0] >> 4) & 0x01;
1979 ac = IEEE80211_AC_BK;
1981 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1982 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1984 params[ac].mu_edca = !!mu_edca;
1986 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1989 ac = IEEE80211_AC_VI;
1991 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1992 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1994 params[ac].mu_edca = !!mu_edca;
1996 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1999 ac = IEEE80211_AC_VO;
2001 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2002 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2004 params[ac].mu_edca = !!mu_edca;
2006 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2010 ac = IEEE80211_AC_BE;
2012 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2013 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2015 params[ac].mu_edca = !!mu_edca;
2017 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2021 params[ac].aifs = pos[0] & 0x0f;
2023 if (params[ac].aifs < 2) {
2025 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2026 params[ac].aifs, aci);
2027 params[ac].aifs = 2;
2029 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2030 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2031 params[ac].txop = get_unaligned_le16(pos + 2);
2032 params[ac].acm = acm;
2033 params[ac].uapsd = uapsd;
2035 if (params[ac].cw_min == 0 ||
2036 params[ac].cw_min > params[ac].cw_max) {
2038 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2039 params[ac].cw_min, params[ac].cw_max, aci);
2042 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac);
2045 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2047 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2049 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2050 params[ac].txop, params[ac].uapsd,
2051 ifmgd->tx_tspec[ac].downgraded);
2052 sdata->tx_conf[ac] = params[ac];
2053 if (!ifmgd->tx_tspec[ac].downgraded &&
2054 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
2056 "failed to set TX queue parameters for AC %d\n",
2060 /* enable WMM or activate new settings */
2061 sdata->vif.bss_conf.qos = true;
2065 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2067 lockdep_assert_held(&sdata->local->mtx);
2069 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2070 ieee80211_run_deferred_scan(sdata->local);
2073 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2075 mutex_lock(&sdata->local->mtx);
2076 __ieee80211_stop_poll(sdata);
2077 mutex_unlock(&sdata->local->mtx);
2080 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2081 u16 capab, bool erp_valid, u8 erp)
2083 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2084 struct ieee80211_supported_band *sband;
2086 bool use_protection;
2087 bool use_short_preamble;
2088 bool use_short_slot;
2090 sband = ieee80211_get_sband(sdata);
2095 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2096 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2098 use_protection = false;
2099 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2102 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2103 if (sband->band == NL80211_BAND_5GHZ)
2104 use_short_slot = true;
2106 if (use_protection != bss_conf->use_cts_prot) {
2107 bss_conf->use_cts_prot = use_protection;
2108 changed |= BSS_CHANGED_ERP_CTS_PROT;
2111 if (use_short_preamble != bss_conf->use_short_preamble) {
2112 bss_conf->use_short_preamble = use_short_preamble;
2113 changed |= BSS_CHANGED_ERP_PREAMBLE;
2116 if (use_short_slot != bss_conf->use_short_slot) {
2117 bss_conf->use_short_slot = use_short_slot;
2118 changed |= BSS_CHANGED_ERP_SLOT;
2124 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2125 struct cfg80211_bss *cbss,
2126 u32 bss_info_changed)
2128 struct ieee80211_bss *bss = (void *)cbss->priv;
2129 struct ieee80211_local *local = sdata->local;
2130 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2132 bss_info_changed |= BSS_CHANGED_ASSOC;
2133 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2134 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2136 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2137 beacon_loss_count * bss_conf->beacon_int));
2139 sdata->u.mgd.associated = cbss;
2140 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2142 ieee80211_check_rate_mask(sdata);
2144 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2146 if (sdata->vif.p2p ||
2147 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2148 const struct cfg80211_bss_ies *ies;
2151 ies = rcu_dereference(cbss->ies);
2155 ret = cfg80211_get_p2p_attr(
2156 ies->data, ies->len,
2157 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2158 (u8 *) &bss_conf->p2p_noa_attr,
2159 sizeof(bss_conf->p2p_noa_attr));
2161 sdata->u.mgd.p2p_noa_index =
2162 bss_conf->p2p_noa_attr.index;
2163 bss_info_changed |= BSS_CHANGED_P2P_PS;
2169 /* just to be sure */
2170 ieee80211_stop_poll(sdata);
2172 ieee80211_led_assoc(local, 1);
2174 if (sdata->u.mgd.have_beacon) {
2176 * If the AP is buggy we may get here with no DTIM period
2177 * known, so assume it's 1 which is the only safe assumption
2178 * in that case, although if the TIM IE is broken powersave
2179 * probably just won't work at all.
2181 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2182 bss_conf->beacon_rate = bss->beacon_rate;
2183 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2185 bss_conf->beacon_rate = NULL;
2186 bss_conf->dtim_period = 0;
2189 bss_conf->assoc = 1;
2191 /* Tell the driver to monitor connection quality (if supported) */
2192 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2193 bss_conf->cqm_rssi_thold)
2194 bss_info_changed |= BSS_CHANGED_CQM;
2196 /* Enable ARP filtering */
2197 if (bss_conf->arp_addr_cnt)
2198 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2200 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2202 mutex_lock(&local->iflist_mtx);
2203 ieee80211_recalc_ps(local);
2204 mutex_unlock(&local->iflist_mtx);
2206 ieee80211_recalc_smps(sdata);
2207 ieee80211_recalc_ps_vif(sdata);
2209 netif_carrier_on(sdata->dev);
2212 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2213 u16 stype, u16 reason, bool tx,
2216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2217 struct ieee80211_local *local = sdata->local;
2220 sdata_assert_lock(sdata);
2222 if (WARN_ON_ONCE(tx && !frame_buf))
2225 if (WARN_ON(!ifmgd->associated))
2228 ieee80211_stop_poll(sdata);
2230 ifmgd->associated = NULL;
2231 netif_carrier_off(sdata->dev);
2234 * if we want to get out of ps before disassoc (why?) we have
2235 * to do it before sending disassoc, as otherwise the null-packet
2238 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2239 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2240 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2242 local->ps_sdata = NULL;
2244 /* disable per-vif ps */
2245 ieee80211_recalc_ps_vif(sdata);
2247 /* make sure ongoing transmission finishes */
2251 * drop any frame before deauth/disassoc, this can be data or
2252 * management frame. Since we are disconnecting, we should not
2253 * insist sending these frames which can take time and delay
2254 * the disconnection and possible the roaming.
2257 ieee80211_flush_queues(local, sdata, true);
2259 /* deauthenticate/disassociate now */
2260 if (tx || frame_buf) {
2262 * In multi channel scenarios guarantee that the virtual
2263 * interface is granted immediate airtime to transmit the
2264 * deauthentication frame by calling mgd_prepare_tx, if the
2265 * driver requested so.
2267 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2268 !ifmgd->have_beacon)
2269 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2271 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2272 reason, tx, frame_buf);
2275 /* flush out frame - make sure the deauth was actually sent */
2277 ieee80211_flush_queues(local, sdata, false);
2279 /* clear bssid only after building the needed mgmt frames */
2280 eth_zero_addr(ifmgd->bssid);
2282 /* remove AP and TDLS peers */
2283 sta_info_flush(sdata);
2285 /* finally reset all BSS / config parameters */
2286 changed |= ieee80211_reset_erp_info(sdata);
2288 ieee80211_led_assoc(local, 0);
2289 changed |= BSS_CHANGED_ASSOC;
2290 sdata->vif.bss_conf.assoc = false;
2292 ifmgd->p2p_noa_index = -1;
2293 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2294 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2296 /* on the next assoc, re-program HT/VHT parameters */
2297 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2298 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2299 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2300 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2302 /* reset MU-MIMO ownership and group data */
2303 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2304 sizeof(sdata->vif.bss_conf.mu_group.membership));
2305 memset(sdata->vif.bss_conf.mu_group.position, 0,
2306 sizeof(sdata->vif.bss_conf.mu_group.position));
2307 changed |= BSS_CHANGED_MU_GROUPS;
2308 sdata->vif.mu_mimo_owner = false;
2310 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2312 del_timer_sync(&local->dynamic_ps_timer);
2313 cancel_work_sync(&local->dynamic_ps_enable_work);
2315 /* Disable ARP filtering */
2316 if (sdata->vif.bss_conf.arp_addr_cnt)
2317 changed |= BSS_CHANGED_ARP_FILTER;
2319 sdata->vif.bss_conf.qos = false;
2320 changed |= BSS_CHANGED_QOS;
2322 /* The BSSID (not really interesting) and HT changed */
2323 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2324 ieee80211_bss_info_change_notify(sdata, changed);
2326 /* disassociated - set to defaults now */
2327 ieee80211_set_wmm_default(sdata, false, false);
2329 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2330 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2331 del_timer_sync(&sdata->u.mgd.timer);
2332 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2334 sdata->vif.bss_conf.dtim_period = 0;
2335 sdata->vif.bss_conf.beacon_rate = NULL;
2337 ifmgd->have_beacon = false;
2340 mutex_lock(&local->mtx);
2341 ieee80211_vif_release_channel(sdata);
2343 sdata->vif.csa_active = false;
2344 ifmgd->csa_waiting_bcn = false;
2345 ifmgd->csa_ignored_same_chan = false;
2346 if (sdata->csa_block_tx) {
2347 ieee80211_wake_vif_queues(local, sdata,
2348 IEEE80211_QUEUE_STOP_REASON_CSA);
2349 sdata->csa_block_tx = false;
2351 mutex_unlock(&local->mtx);
2353 /* existing TX TSPEC sessions no longer exist */
2354 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2355 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2357 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2360 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2361 struct ieee80211_hdr *hdr)
2364 * We can postpone the mgd.timer whenever receiving unicast frames
2365 * from AP because we know that the connection is working both ways
2366 * at that time. But multicast frames (and hence also beacons) must
2367 * be ignored here, because we need to trigger the timer during
2368 * data idle periods for sending the periodic probe request to the
2369 * AP we're connected to.
2371 if (is_multicast_ether_addr(hdr->addr1))
2374 ieee80211_sta_reset_conn_monitor(sdata);
2377 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2379 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2380 struct ieee80211_local *local = sdata->local;
2382 mutex_lock(&local->mtx);
2383 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2386 __ieee80211_stop_poll(sdata);
2388 mutex_lock(&local->iflist_mtx);
2389 ieee80211_recalc_ps(local);
2390 mutex_unlock(&local->iflist_mtx);
2392 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2396 * We've received a probe response, but are not sure whether
2397 * we have or will be receiving any beacons or data, so let's
2398 * schedule the timers again, just in case.
2400 ieee80211_sta_reset_beacon_monitor(sdata);
2402 mod_timer(&ifmgd->conn_mon_timer,
2403 round_jiffies_up(jiffies +
2404 IEEE80211_CONNECTION_IDLE_TIME));
2406 mutex_unlock(&local->mtx);
2409 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2410 struct ieee80211_hdr *hdr,
2413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2414 u16 tid = ieee80211_get_tid(hdr);
2415 int ac = ieee80211_ac_from_tid(tid);
2416 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2417 unsigned long now = jiffies;
2419 if (likely(!tx_tspec->admitted_time))
2422 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2423 tx_tspec->consumed_tx_time = 0;
2424 tx_tspec->time_slice_start = now;
2426 if (tx_tspec->downgraded) {
2427 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2428 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2432 if (tx_tspec->downgraded)
2435 tx_tspec->consumed_tx_time += tx_time;
2437 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2438 tx_tspec->downgraded = true;
2439 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2440 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2444 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2445 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2447 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2449 if (!ieee80211_is_data(hdr->frame_control))
2452 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2453 sdata->u.mgd.probe_send_count > 0) {
2455 ieee80211_sta_reset_conn_monitor(sdata);
2457 sdata->u.mgd.nullfunc_failed = true;
2458 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2463 ieee80211_sta_reset_conn_monitor(sdata);
2466 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2467 const u8 *src, const u8 *dst,
2468 const u8 *ssid, size_t ssid_len,
2469 struct ieee80211_channel *channel)
2471 struct sk_buff *skb;
2473 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2474 ssid, ssid_len, NULL, 0,
2475 IEEE80211_PROBE_FLAG_DIRECTED);
2477 ieee80211_tx_skb(sdata, skb);
2480 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2482 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2484 u8 *dst = ifmgd->associated->bssid;
2485 u8 unicast_limit = max(1, max_probe_tries - 3);
2486 struct sta_info *sta;
2489 * Try sending broadcast probe requests for the last three
2490 * probe requests after the first ones failed since some
2491 * buggy APs only support broadcast probe requests.
2493 if (ifmgd->probe_send_count >= unicast_limit)
2497 * When the hardware reports an accurate Tx ACK status, it's
2498 * better to send a nullfunc frame instead of a probe request,
2499 * as it will kick us off the AP quickly if we aren't associated
2500 * anymore. The timeout will be reset if the frame is ACKed by
2503 ifmgd->probe_send_count++;
2506 mutex_lock(&sdata->local->sta_mtx);
2507 sta = sta_info_get(sdata, dst);
2509 ieee80211_check_fast_rx(sta);
2510 mutex_unlock(&sdata->local->sta_mtx);
2513 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2514 ifmgd->nullfunc_failed = false;
2515 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
2516 ifmgd->probe_send_count--;
2518 ieee80211_send_nullfunc(sdata->local, sdata, false);
2523 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2524 if (WARN_ON_ONCE(ssid == NULL))
2529 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2531 ifmgd->associated->channel);
2535 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2536 run_again(sdata, ifmgd->probe_timeout);
2539 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2543 bool already = false;
2545 if (!ieee80211_sdata_running(sdata))
2550 if (!ifmgd->associated)
2553 mutex_lock(&sdata->local->mtx);
2555 if (sdata->local->tmp_channel || sdata->local->scanning) {
2556 mutex_unlock(&sdata->local->mtx);
2561 mlme_dbg_ratelimited(sdata,
2562 "detected beacon loss from AP (missed %d beacons) - probing\n",
2565 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2569 * The driver/our work has already reported this event or the
2570 * connection monitoring has kicked in and we have already sent
2571 * a probe request. Or maybe the AP died and the driver keeps
2572 * reporting until we disassociate...
2574 * In either case we have to ignore the current call to this
2575 * function (except for setting the correct probe reason bit)
2576 * because otherwise we would reset the timer every time and
2577 * never check whether we received a probe response!
2579 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2582 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2584 mutex_unlock(&sdata->local->mtx);
2589 mutex_lock(&sdata->local->iflist_mtx);
2590 ieee80211_recalc_ps(sdata->local);
2591 mutex_unlock(&sdata->local->iflist_mtx);
2593 ifmgd->probe_send_count = 0;
2594 ieee80211_mgd_probe_ap_send(sdata);
2596 sdata_unlock(sdata);
2599 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2600 struct ieee80211_vif *vif)
2602 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2604 struct cfg80211_bss *cbss;
2605 struct sk_buff *skb;
2609 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2612 sdata_assert_lock(sdata);
2614 if (ifmgd->associated)
2615 cbss = ifmgd->associated;
2616 else if (ifmgd->auth_data)
2617 cbss = ifmgd->auth_data->bss;
2618 else if (ifmgd->assoc_data)
2619 cbss = ifmgd->assoc_data->bss;
2624 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2625 if (WARN_ON_ONCE(ssid == NULL))
2630 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2631 (u32) -1, cbss->channel,
2633 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2638 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2640 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2641 const u8 *buf, size_t len, bool tx,
2644 struct ieee80211_event event = {
2646 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2647 .u.mlme.reason = reason,
2651 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2653 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2655 drv_event_callback(sdata->local, sdata, &event);
2658 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2660 struct ieee80211_local *local = sdata->local;
2661 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2662 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2666 if (!ifmgd->associated) {
2667 sdata_unlock(sdata);
2671 tx = !sdata->csa_block_tx;
2673 /* AP is probably out of range (or not reachable for another reason) so
2674 * remove the bss struct for that AP.
2676 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2678 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2679 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2681 mutex_lock(&local->mtx);
2682 sdata->vif.csa_active = false;
2683 ifmgd->csa_waiting_bcn = false;
2684 if (sdata->csa_block_tx) {
2685 ieee80211_wake_vif_queues(local, sdata,
2686 IEEE80211_QUEUE_STOP_REASON_CSA);
2687 sdata->csa_block_tx = false;
2689 mutex_unlock(&local->mtx);
2691 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2692 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2694 sdata_unlock(sdata);
2697 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2699 struct ieee80211_sub_if_data *sdata =
2700 container_of(work, struct ieee80211_sub_if_data,
2701 u.mgd.beacon_connection_loss_work);
2702 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2704 if (ifmgd->associated)
2705 ifmgd->beacon_loss_count++;
2707 if (ifmgd->connection_loss) {
2708 sdata_info(sdata, "Connection to AP %pM lost\n",
2710 __ieee80211_disconnect(sdata);
2712 ieee80211_mgd_probe_ap(sdata, true);
2716 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2718 struct ieee80211_sub_if_data *sdata =
2719 container_of(work, struct ieee80211_sub_if_data,
2720 u.mgd.csa_connection_drop_work);
2722 __ieee80211_disconnect(sdata);
2725 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2727 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2728 struct ieee80211_hw *hw = &sdata->local->hw;
2730 trace_api_beacon_loss(sdata);
2732 sdata->u.mgd.connection_loss = false;
2733 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2735 EXPORT_SYMBOL(ieee80211_beacon_loss);
2737 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2739 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2740 struct ieee80211_hw *hw = &sdata->local->hw;
2742 trace_api_connection_loss(sdata);
2744 sdata->u.mgd.connection_loss = true;
2745 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2747 EXPORT_SYMBOL(ieee80211_connection_loss);
2750 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2753 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2755 sdata_assert_lock(sdata);
2759 * we are not authenticated yet, the only timer that could be
2760 * running is the timeout for the authentication response which
2761 * which is not relevant anymore.
2763 del_timer_sync(&sdata->u.mgd.timer);
2764 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2766 eth_zero_addr(sdata->u.mgd.bssid);
2767 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2768 sdata->u.mgd.flags = 0;
2769 mutex_lock(&sdata->local->mtx);
2770 ieee80211_vif_release_channel(sdata);
2771 mutex_unlock(&sdata->local->mtx);
2774 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2776 sdata->u.mgd.auth_data = NULL;
2779 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2780 bool assoc, bool abandon)
2782 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2784 sdata_assert_lock(sdata);
2788 * we are not associated yet, the only timer that could be
2789 * running is the timeout for the association response which
2790 * which is not relevant anymore.
2792 del_timer_sync(&sdata->u.mgd.timer);
2793 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2795 eth_zero_addr(sdata->u.mgd.bssid);
2796 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2797 sdata->u.mgd.flags = 0;
2798 sdata->vif.mu_mimo_owner = false;
2800 mutex_lock(&sdata->local->mtx);
2801 ieee80211_vif_release_channel(sdata);
2802 mutex_unlock(&sdata->local->mtx);
2805 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2809 sdata->u.mgd.assoc_data = NULL;
2812 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2813 struct ieee80211_mgmt *mgmt, size_t len)
2815 struct ieee80211_local *local = sdata->local;
2816 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2818 struct ieee802_11_elems elems;
2821 pos = mgmt->u.auth.variable;
2822 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2823 mgmt->bssid, auth_data->bss->bssid);
2824 if (!elems.challenge)
2826 auth_data->expected_transaction = 4;
2827 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2828 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2829 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2830 IEEE80211_TX_INTFL_MLME_CONN_TX;
2831 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2832 elems.challenge - 2, elems.challenge_len + 2,
2833 auth_data->bss->bssid, auth_data->bss->bssid,
2834 auth_data->key, auth_data->key_len,
2835 auth_data->key_idx, tx_flags);
2838 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2842 struct sta_info *sta;
2845 sdata_info(sdata, "authenticated\n");
2846 ifmgd->auth_data->done = true;
2847 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2848 ifmgd->auth_data->timeout_started = true;
2849 run_again(sdata, ifmgd->auth_data->timeout);
2851 /* move station state to auth */
2852 mutex_lock(&sdata->local->sta_mtx);
2853 sta = sta_info_get(sdata, bssid);
2855 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2859 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2860 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2866 mutex_unlock(&sdata->local->sta_mtx);
2870 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2871 struct ieee80211_mgmt *mgmt, size_t len)
2873 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2875 u16 auth_alg, auth_transaction, status_code;
2876 struct ieee80211_event event = {
2878 .u.mlme.data = AUTH_EVENT,
2881 sdata_assert_lock(sdata);
2886 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2889 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2891 if (!ether_addr_equal(bssid, mgmt->bssid))
2894 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2895 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2896 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2898 if (auth_alg != ifmgd->auth_data->algorithm ||
2899 (auth_alg != WLAN_AUTH_SAE &&
2900 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2901 (auth_alg == WLAN_AUTH_SAE &&
2902 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2903 auth_transaction > 2))) {
2904 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2905 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2907 ifmgd->auth_data->expected_transaction);
2911 if (status_code != WLAN_STATUS_SUCCESS) {
2912 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2913 mgmt->sa, status_code);
2914 ieee80211_destroy_auth_data(sdata, false);
2915 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2916 event.u.mlme.status = MLME_DENIED;
2917 event.u.mlme.reason = status_code;
2918 drv_event_callback(sdata->local, sdata, &event);
2922 switch (ifmgd->auth_data->algorithm) {
2923 case WLAN_AUTH_OPEN:
2924 case WLAN_AUTH_LEAP:
2927 case WLAN_AUTH_FILS_SK:
2928 case WLAN_AUTH_FILS_SK_PFS:
2929 case WLAN_AUTH_FILS_PK:
2931 case WLAN_AUTH_SHARED_KEY:
2932 if (ifmgd->auth_data->expected_transaction != 4) {
2933 ieee80211_auth_challenge(sdata, mgmt, len);
2934 /* need another frame */
2939 WARN_ONCE(1, "invalid auth alg %d",
2940 ifmgd->auth_data->algorithm);
2944 event.u.mlme.status = MLME_SUCCESS;
2945 drv_event_callback(sdata->local, sdata, &event);
2946 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2947 (auth_transaction == 2 &&
2948 ifmgd->auth_data->expected_transaction == 2)) {
2949 if (!ieee80211_mark_sta_auth(sdata, bssid))
2951 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2952 auth_transaction == 2) {
2953 sdata_info(sdata, "SAE peer confirmed\n");
2954 ifmgd->auth_data->peer_confirmed = true;
2957 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2960 mutex_unlock(&sdata->local->sta_mtx);
2961 /* ignore frame -- wait for timeout */
2964 #define case_WLAN(type) \
2965 case WLAN_REASON_##type: return #type
2967 const char *ieee80211_get_reason_code_string(u16 reason_code)
2969 switch (reason_code) {
2970 case_WLAN(UNSPECIFIED);
2971 case_WLAN(PREV_AUTH_NOT_VALID);
2972 case_WLAN(DEAUTH_LEAVING);
2973 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2974 case_WLAN(DISASSOC_AP_BUSY);
2975 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2976 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2977 case_WLAN(DISASSOC_STA_HAS_LEFT);
2978 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2979 case_WLAN(DISASSOC_BAD_POWER);
2980 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2981 case_WLAN(INVALID_IE);
2982 case_WLAN(MIC_FAILURE);
2983 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2984 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2985 case_WLAN(IE_DIFFERENT);
2986 case_WLAN(INVALID_GROUP_CIPHER);
2987 case_WLAN(INVALID_PAIRWISE_CIPHER);
2988 case_WLAN(INVALID_AKMP);
2989 case_WLAN(UNSUPP_RSN_VERSION);
2990 case_WLAN(INVALID_RSN_IE_CAP);
2991 case_WLAN(IEEE8021X_FAILED);
2992 case_WLAN(CIPHER_SUITE_REJECTED);
2993 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2994 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2995 case_WLAN(DISASSOC_LOW_ACK);
2996 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2997 case_WLAN(QSTA_LEAVE_QBSS);
2998 case_WLAN(QSTA_NOT_USE);
2999 case_WLAN(QSTA_REQUIRE_SETUP);
3000 case_WLAN(QSTA_TIMEOUT);
3001 case_WLAN(QSTA_CIPHER_NOT_SUPP);
3002 case_WLAN(MESH_PEER_CANCELED);
3003 case_WLAN(MESH_MAX_PEERS);
3004 case_WLAN(MESH_CONFIG);
3005 case_WLAN(MESH_CLOSE);
3006 case_WLAN(MESH_MAX_RETRIES);
3007 case_WLAN(MESH_CONFIRM_TIMEOUT);
3008 case_WLAN(MESH_INVALID_GTK);
3009 case_WLAN(MESH_INCONSISTENT_PARAM);
3010 case_WLAN(MESH_INVALID_SECURITY);
3011 case_WLAN(MESH_PATH_ERROR);
3012 case_WLAN(MESH_PATH_NOFORWARD);
3013 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3014 case_WLAN(MAC_EXISTS_IN_MBSS);
3015 case_WLAN(MESH_CHAN_REGULATORY);
3016 case_WLAN(MESH_CHAN);
3017 default: return "<unknown>";
3021 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3022 struct ieee80211_mgmt *mgmt, size_t len)
3024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3025 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3027 sdata_assert_lock(sdata);
3032 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3033 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3037 if (ifmgd->associated &&
3038 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3039 const u8 *bssid = ifmgd->associated->bssid;
3041 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3043 ieee80211_get_reason_code_string(reason_code));
3045 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3047 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3052 if (ifmgd->assoc_data &&
3053 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3054 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3057 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3059 ieee80211_get_reason_code_string(reason_code));
3061 ieee80211_destroy_assoc_data(sdata, false, true);
3063 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3069 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3070 struct ieee80211_mgmt *mgmt, size_t len)
3072 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3075 sdata_assert_lock(sdata);
3080 if (!ifmgd->associated ||
3081 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3084 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3086 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3087 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3091 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3092 mgmt->sa, reason_code,
3093 ieee80211_get_reason_code_string(reason_code));
3095 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3097 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3100 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3101 u8 *supp_rates, unsigned int supp_rates_len,
3102 u32 *rates, u32 *basic_rates,
3103 bool *have_higher_than_11mbit,
3104 int *min_rate, int *min_rate_index,
3109 for (i = 0; i < supp_rates_len; i++) {
3110 int rate = supp_rates[i] & 0x7f;
3111 bool is_basic = !!(supp_rates[i] & 0x80);
3113 if ((rate * 5 * (1 << shift)) > 110)
3114 *have_higher_than_11mbit = true;
3117 * Skip HT and VHT BSS membership selectors since they're not
3120 * Note: Even though the membership selector and the basic
3121 * rate flag share the same bit, they are not exactly
3124 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3125 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3128 for (j = 0; j < sband->n_bitrates; j++) {
3129 struct ieee80211_rate *br;
3132 br = &sband->bitrates[j];
3134 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3135 if (brate == rate) {
3138 *basic_rates |= BIT(j);
3139 if ((rate * 5) < *min_rate) {
3140 *min_rate = rate * 5;
3141 *min_rate_index = j;
3149 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3150 const struct ieee802_11_elems *elems)
3152 if (elems->ext_capab_len < 10)
3155 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3158 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3159 IEEE80211_HE_MAC_CAP0_TWT_RES;
3162 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3163 struct sta_info *sta,
3164 struct ieee802_11_elems *elems)
3166 bool twt = ieee80211_twt_req_supported(sta, elems);
3168 if (sdata->vif.bss_conf.twt_requester != twt) {
3169 sdata->vif.bss_conf.twt_requester = twt;
3170 return BSS_CHANGED_TWT;
3175 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3176 struct cfg80211_bss *cbss,
3177 struct ieee80211_mgmt *mgmt, size_t len)
3179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3180 struct ieee80211_local *local = sdata->local;
3181 struct ieee80211_supported_band *sband;
3182 struct sta_info *sta;
3184 u16 capab_info, aid;
3185 struct ieee802_11_elems elems;
3186 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3187 const struct cfg80211_bss_ies *bss_ies = NULL;
3188 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3193 /* AssocResp and ReassocResp have identical structure */
3195 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3196 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3199 * The 5 MSB of the AID field are reserved
3200 * (802.11-2016 9.4.1.8 AID field)
3204 ifmgd->broken_ap = false;
3206 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3207 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3210 ifmgd->broken_ap = true;
3213 pos = mgmt->u.assoc_resp.variable;
3214 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3215 mgmt->bssid, assoc_data->bss->bssid);
3217 if (!elems.supp_rates) {
3218 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3223 ifmgd->tdls_chan_switch_prohibited =
3224 elems.ext_capab && elems.ext_capab_len >= 5 &&
3225 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3228 * Some APs are erroneously not including some information in their
3229 * (re)association response frames. Try to recover by using the data
3230 * from the beacon or probe response. This seems to afflict mobile
3231 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3232 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3234 if ((assoc_data->wmm && !elems.wmm_param) ||
3235 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3236 (!elems.ht_cap_elem || !elems.ht_operation)) ||
3237 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3238 (!elems.vht_cap_elem || !elems.vht_operation))) {
3239 const struct cfg80211_bss_ies *ies;
3240 struct ieee802_11_elems bss_elems;
3243 ies = rcu_dereference(cbss->ies);
3245 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3251 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3254 assoc_data->bss->bssid);
3255 if (assoc_data->wmm &&
3256 !elems.wmm_param && bss_elems.wmm_param) {
3257 elems.wmm_param = bss_elems.wmm_param;
3259 "AP bug: WMM param missing from AssocResp\n");
3263 * Also check if we requested HT/VHT, otherwise the AP doesn't
3264 * have to include the IEs in the (re)association response.
3266 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3267 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3268 elems.ht_cap_elem = bss_elems.ht_cap_elem;
3270 "AP bug: HT capability missing from AssocResp\n");
3272 if (!elems.ht_operation && bss_elems.ht_operation &&
3273 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3274 elems.ht_operation = bss_elems.ht_operation;
3276 "AP bug: HT operation missing from AssocResp\n");
3278 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3279 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3280 elems.vht_cap_elem = bss_elems.vht_cap_elem;
3282 "AP bug: VHT capa missing from AssocResp\n");
3284 if (!elems.vht_operation && bss_elems.vht_operation &&
3285 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3286 elems.vht_operation = bss_elems.vht_operation;
3288 "AP bug: VHT operation missing from AssocResp\n");
3293 * We previously checked these in the beacon/probe response, so
3294 * they should be present here. This is just a safety net.
3296 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3297 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3299 "HT AP is missing WMM params or HT capability/operation\n");
3304 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3305 (!elems.vht_cap_elem || !elems.vht_operation)) {
3307 "VHT AP is missing VHT capability/operation\n");
3312 mutex_lock(&sdata->local->sta_mtx);
3314 * station info was already allocated and inserted before
3315 * the association and should be available to us
3317 sta = sta_info_get(sdata, cbss->bssid);
3318 if (WARN_ON(!sta)) {
3319 mutex_unlock(&sdata->local->sta_mtx);
3324 sband = ieee80211_get_sband(sdata);
3326 mutex_unlock(&sdata->local->sta_mtx);
3331 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3332 (!elems.he_cap || !elems.he_operation)) {
3333 mutex_unlock(&sdata->local->sta_mtx);
3335 "HE AP is missing HE capability/operation\n");
3340 /* Set up internal HT/VHT capabilities */
3341 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3342 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3343 elems.ht_cap_elem, sta);
3345 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3346 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3347 elems.vht_cap_elem, sta);
3349 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3351 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3356 bss_conf->he_support = sta->sta.he_cap.has_he;
3357 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
3359 bss_conf->he_support = false;
3360 bss_conf->twt_requester = false;
3363 if (bss_conf->he_support) {
3364 bss_conf->bss_color =
3365 le32_get_bits(elems.he_operation->he_oper_params,
3366 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3368 bss_conf->htc_trig_based_pkt_ext =
3369 le32_get_bits(elems.he_operation->he_oper_params,
3370 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3371 bss_conf->frame_time_rts_th =
3372 le32_get_bits(elems.he_operation->he_oper_params,
3373 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3375 bss_conf->multi_sta_back_32bit =
3376 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3377 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3379 bss_conf->ack_enabled =
3380 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3381 IEEE80211_HE_MAC_CAP2_ACK_EN;
3383 bss_conf->uora_exists = !!elems.uora_element;
3384 if (elems.uora_element)
3385 bss_conf->uora_ocw_range = elems.uora_element[0];
3387 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems.he_operation);
3388 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems.he_spr);
3389 /* TODO: OPEN: what happens if BSS color disable is set? */
3392 if (cbss->transmitted_bss) {
3393 bss_conf->nontransmitted = true;
3394 ether_addr_copy(bss_conf->transmitter_bssid,
3395 cbss->transmitted_bss->bssid);
3396 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3397 bss_conf->bssid_index = cbss->bssid_index;
3401 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3402 * in their association response, so ignore that data for our own
3403 * configuration. If it changed since the last beacon, we'll get the
3404 * next beacon and update then.
3408 * If an operating mode notification IE is present, override the
3409 * NSS calculation (that would be done in rate_control_rate_init())
3410 * and use the # of streams from that element.
3412 if (elems.opmode_notif &&
3413 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3416 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3417 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3419 sta->sta.rx_nss = nss;
3422 rate_control_rate_init(sta);
3424 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3425 set_sta_flag(sta, WLAN_STA_MFP);
3426 sta->sta.mfp = true;
3428 sta->sta.mfp = false;
3431 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3433 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3434 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3435 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3438 "failed to move station %pM to desired state\n",
3440 WARN_ON(__sta_info_destroy(sta));
3441 mutex_unlock(&sdata->local->sta_mtx);
3446 mutex_unlock(&sdata->local->sta_mtx);
3449 * Always handle WMM once after association regardless
3450 * of the first value the AP uses. Setting -1 here has
3451 * that effect because the AP values is an unsigned
3454 ifmgd->wmm_last_param_set = -1;
3455 ifmgd->mu_edca_last_param_set = -1;
3457 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3458 ieee80211_set_wmm_default(sdata, false, false);
3459 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3460 elems.wmm_param_len,
3461 elems.mu_edca_param_set)) {
3462 /* still enable QoS since we might have HT/VHT */
3463 ieee80211_set_wmm_default(sdata, false, true);
3464 /* set the disable-WMM flag in this case to disable
3465 * tracking WMM parameter changes in the beacon if
3466 * the parameters weren't actually valid. Doing so
3467 * avoids changing parameters very strangely when
3468 * the AP is going back and forth between valid and
3469 * invalid parameters.
3471 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3473 changed |= BSS_CHANGED_QOS;
3475 if (elems.max_idle_period_ie) {
3476 bss_conf->max_idle_period =
3477 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3478 bss_conf->protected_keep_alive =
3479 !!(elems.max_idle_period_ie->idle_options &
3480 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3481 changed |= BSS_CHANGED_KEEP_ALIVE;
3483 bss_conf->max_idle_period = 0;
3484 bss_conf->protected_keep_alive = false;
3487 /* set AID and assoc capability,
3488 * ieee80211_set_associated() will tell the driver */
3489 bss_conf->aid = aid;
3490 bss_conf->assoc_capability = capab_info;
3491 ieee80211_set_associated(sdata, cbss, changed);
3494 * If we're using 4-addr mode, let the AP know that we're
3495 * doing so, so that it can create the STA VLAN on its side
3497 if (ifmgd->use_4addr)
3498 ieee80211_send_4addr_nullfunc(local, sdata);
3501 * Start timer to probe the connection to the AP now.
3502 * Also start the timer that will detect beacon loss.
3504 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3505 ieee80211_sta_reset_beacon_monitor(sdata);
3513 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3514 struct ieee80211_mgmt *mgmt,
3517 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3518 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3519 u16 capab_info, status_code, aid;
3520 struct ieee802_11_elems elems;
3521 int ac, uapsd_queues = -1;
3524 struct cfg80211_bss *bss;
3525 struct ieee80211_event event = {
3527 .u.mlme.data = ASSOC_EVENT,
3530 sdata_assert_lock(sdata);
3534 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3538 * AssocResp and ReassocResp have identical structure, so process both
3539 * of them in this function.
3545 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3546 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3547 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3548 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3551 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3552 reassoc ? "Rea" : "A", mgmt->sa,
3553 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3555 if (assoc_data->fils_kek_len &&
3556 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3559 pos = mgmt->u.assoc_resp.variable;
3560 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3561 mgmt->bssid, assoc_data->bss->bssid);
3563 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3564 elems.timeout_int &&
3565 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3567 tu = le32_to_cpu(elems.timeout_int->value);
3568 ms = tu * 1024 / 1000;
3570 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3572 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3573 assoc_data->timeout_started = true;
3574 if (ms > IEEE80211_ASSOC_TIMEOUT)
3575 run_again(sdata, assoc_data->timeout);
3579 bss = assoc_data->bss;
3581 if (status_code != WLAN_STATUS_SUCCESS) {
3582 sdata_info(sdata, "%pM denied association (code=%d)\n",
3583 mgmt->sa, status_code);
3584 ieee80211_destroy_assoc_data(sdata, false, false);
3585 event.u.mlme.status = MLME_DENIED;
3586 event.u.mlme.reason = status_code;
3587 drv_event_callback(sdata->local, sdata, &event);
3589 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3590 /* oops -- internal error -- send timeout for now */
3591 ieee80211_destroy_assoc_data(sdata, false, false);
3592 cfg80211_assoc_timeout(sdata->dev, bss);
3595 event.u.mlme.status = MLME_SUCCESS;
3596 drv_event_callback(sdata->local, sdata, &event);
3597 sdata_info(sdata, "associated\n");
3600 * destroy assoc_data afterwards, as otherwise an idle
3601 * recalc after assoc_data is NULL but before associated
3602 * is set can cause the interface to go idle
3604 ieee80211_destroy_assoc_data(sdata, true, false);
3606 /* get uapsd queues configuration */
3608 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3609 if (sdata->tx_conf[ac].uapsd)
3610 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3613 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3614 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3617 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3618 struct ieee80211_mgmt *mgmt, size_t len,
3619 struct ieee80211_rx_status *rx_status)
3621 struct ieee80211_local *local = sdata->local;
3622 struct ieee80211_bss *bss;
3623 struct ieee80211_channel *channel;
3625 sdata_assert_lock(sdata);
3627 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3631 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3633 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3634 ieee80211_rx_bss_put(local, bss);
3639 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3640 struct sk_buff *skb)
3642 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3643 struct ieee80211_if_managed *ifmgd;
3644 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3645 size_t baselen, len = skb->len;
3647 ifmgd = &sdata->u.mgd;
3649 sdata_assert_lock(sdata);
3651 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3652 return; /* ignore ProbeResp to foreign address */
3654 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3658 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3660 if (ifmgd->associated &&
3661 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3662 ieee80211_reset_ap_probe(sdata);
3666 * This is the canonical list of information elements we care about,
3667 * the filter code also gives us all changes to the Microsoft OUI
3668 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3669 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3670 * changes to requested client power.
3672 * We implement beacon filtering in software since that means we can
3673 * avoid processing the frame here and in cfg80211, and userspace
3674 * will not be able to tell whether the hardware supports it or not.
3676 * XXX: This list needs to be dynamic -- userspace needs to be able to
3677 * add items it requires. It also needs to be able to tell us to
3678 * look out for other vendor IEs.
3680 static const u64 care_about_ies =
3681 (1ULL << WLAN_EID_COUNTRY) |
3682 (1ULL << WLAN_EID_ERP_INFO) |
3683 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3684 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3685 (1ULL << WLAN_EID_HT_CAPABILITY) |
3686 (1ULL << WLAN_EID_HT_OPERATION) |
3687 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3689 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3690 struct ieee80211_if_managed *ifmgd,
3691 struct ieee80211_bss_conf *bss_conf,
3692 struct ieee80211_local *local,
3693 struct ieee80211_rx_status *rx_status)
3695 /* Track average RSSI from the Beacon frames of the current AP */
3697 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3698 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3699 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3700 ifmgd->last_cqm_event_signal = 0;
3701 ifmgd->count_beacon_signal = 1;
3702 ifmgd->last_ave_beacon_signal = 0;
3704 ifmgd->count_beacon_signal++;
3707 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3709 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3710 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3711 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3712 int last_sig = ifmgd->last_ave_beacon_signal;
3713 struct ieee80211_event event = {
3718 * if signal crosses either of the boundaries, invoke callback
3719 * with appropriate parameters
3721 if (sig > ifmgd->rssi_max_thold &&
3722 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3723 ifmgd->last_ave_beacon_signal = sig;
3724 event.u.rssi.data = RSSI_EVENT_HIGH;
3725 drv_event_callback(local, sdata, &event);
3726 } else if (sig < ifmgd->rssi_min_thold &&
3727 (last_sig >= ifmgd->rssi_max_thold ||
3729 ifmgd->last_ave_beacon_signal = sig;
3730 event.u.rssi.data = RSSI_EVENT_LOW;
3731 drv_event_callback(local, sdata, &event);
3735 if (bss_conf->cqm_rssi_thold &&
3736 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3737 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3738 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3739 int last_event = ifmgd->last_cqm_event_signal;
3740 int thold = bss_conf->cqm_rssi_thold;
3741 int hyst = bss_conf->cqm_rssi_hyst;
3744 (last_event == 0 || sig < last_event - hyst)) {
3745 ifmgd->last_cqm_event_signal = sig;
3746 ieee80211_cqm_rssi_notify(
3748 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3750 } else if (sig > thold &&
3751 (last_event == 0 || sig > last_event + hyst)) {
3752 ifmgd->last_cqm_event_signal = sig;
3753 ieee80211_cqm_rssi_notify(
3755 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3760 if (bss_conf->cqm_rssi_low &&
3761 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3762 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3763 int last_event = ifmgd->last_cqm_event_signal;
3764 int low = bss_conf->cqm_rssi_low;
3765 int high = bss_conf->cqm_rssi_high;
3768 (last_event == 0 || last_event >= low)) {
3769 ifmgd->last_cqm_event_signal = sig;
3770 ieee80211_cqm_rssi_notify(
3772 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3774 } else if (sig > high &&
3775 (last_event == 0 || last_event <= high)) {
3776 ifmgd->last_cqm_event_signal = sig;
3777 ieee80211_cqm_rssi_notify(
3779 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3785 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3786 struct cfg80211_bss *bss)
3788 if (ether_addr_equal(tx_bssid, bss->bssid))
3790 if (!bss->transmitted_bss)
3792 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3795 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3796 struct ieee80211_mgmt *mgmt, size_t len,
3797 struct ieee80211_rx_status *rx_status)
3799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3800 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3802 struct ieee802_11_elems elems;
3803 struct ieee80211_local *local = sdata->local;
3804 struct ieee80211_chanctx_conf *chanctx_conf;
3805 struct ieee80211_channel *chan;
3806 struct sta_info *sta;
3812 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3814 sdata_assert_lock(sdata);
3816 /* Process beacon from the current BSS */
3817 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3822 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3823 if (!chanctx_conf) {
3828 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3832 chan = chanctx_conf->def.chan;
3835 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3836 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3837 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3838 len - baselen, false, &elems,
3840 ifmgd->assoc_data->bss->bssid);
3842 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3844 if (elems.dtim_period)
3845 ifmgd->dtim_period = elems.dtim_period;
3846 ifmgd->have_beacon = true;
3847 ifmgd->assoc_data->need_beacon = false;
3848 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3849 sdata->vif.bss_conf.sync_tsf =
3850 le64_to_cpu(mgmt->u.beacon.timestamp);
3851 sdata->vif.bss_conf.sync_device_ts =
3852 rx_status->device_timestamp;
3853 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3856 if (elems.mbssid_config_ie)
3857 bss_conf->profile_periodicity =
3858 elems.mbssid_config_ie->profile_periodicity;
3860 if (elems.ext_capab_len >= 11 &&
3861 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3862 bss_conf->ema_ap = true;
3864 /* continue assoc process */
3865 ifmgd->assoc_data->timeout = jiffies;
3866 ifmgd->assoc_data->timeout_started = true;
3867 run_again(sdata, ifmgd->assoc_data->timeout);
3871 if (!ifmgd->associated ||
3872 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated))
3874 bssid = ifmgd->associated->bssid;
3876 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3877 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3880 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3881 mlme_dbg_ratelimited(sdata,
3882 "cancelling AP probe due to a received beacon\n");
3883 ieee80211_reset_ap_probe(sdata);
3887 * Push the beacon loss detection into the future since
3888 * we are processing a beacon from the AP just now.
3890 ieee80211_sta_reset_beacon_monitor(sdata);
3892 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3893 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3894 len - baselen, false, &elems,
3895 care_about_ies, ncrc,
3896 mgmt->bssid, bssid);
3898 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3899 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3900 if (local->hw.conf.dynamic_ps_timeout > 0) {
3901 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3902 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3903 ieee80211_hw_config(local,
3904 IEEE80211_CONF_CHANGE_PS);
3906 ieee80211_send_nullfunc(local, sdata, false);
3907 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3908 local->pspolling = true;
3911 * Here is assumed that the driver will be
3912 * able to send ps-poll frame and receive a
3913 * response even though power save mode is
3914 * enabled, but some drivers might require
3915 * to disable power save here. This needs
3916 * to be investigated.
3918 ieee80211_send_pspoll(local, sdata);
3922 if (sdata->vif.p2p ||
3923 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3924 struct ieee80211_p2p_noa_attr noa = {};
3927 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3929 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3930 (u8 *) &noa, sizeof(noa));
3932 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3933 /* valid noa_attr and index changed */
3934 sdata->u.mgd.p2p_noa_index = noa.index;
3935 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3936 changed |= BSS_CHANGED_P2P_PS;
3938 * make sure we update all information, the CRC
3939 * mechanism doesn't look at P2P attributes.
3941 ifmgd->beacon_crc_valid = false;
3943 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3944 /* noa_attr not found and we had valid noa_attr before */
3945 sdata->u.mgd.p2p_noa_index = -1;
3946 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3947 changed |= BSS_CHANGED_P2P_PS;
3948 ifmgd->beacon_crc_valid = false;
3952 if (ifmgd->csa_waiting_bcn)
3953 ieee80211_chswitch_post_beacon(sdata);
3956 * Update beacon timing and dtim count on every beacon appearance. This
3957 * will allow the driver to use the most updated values. Do it before
3958 * comparing this one with last received beacon.
3959 * IMPORTANT: These parameters would possibly be out of sync by the time
3960 * the driver will use them. The synchronized view is currently
3961 * guaranteed only in certain callbacks.
3963 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3964 sdata->vif.bss_conf.sync_tsf =
3965 le64_to_cpu(mgmt->u.beacon.timestamp);
3966 sdata->vif.bss_conf.sync_device_ts =
3967 rx_status->device_timestamp;
3968 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3971 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3973 ifmgd->beacon_crc = ncrc;
3974 ifmgd->beacon_crc_valid = true;
3976 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3978 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3979 rx_status->device_timestamp,
3982 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3983 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3984 elems.wmm_param_len,
3985 elems.mu_edca_param_set))
3986 changed |= BSS_CHANGED_QOS;
3989 * If we haven't had a beacon before, tell the driver about the
3990 * DTIM period (and beacon timing if desired) now.
3992 if (!ifmgd->have_beacon) {
3993 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3994 bss_conf->dtim_period = elems.dtim_period ?: 1;
3996 changed |= BSS_CHANGED_BEACON_INFO;
3997 ifmgd->have_beacon = true;
3999 mutex_lock(&local->iflist_mtx);
4000 ieee80211_recalc_ps(local);
4001 mutex_unlock(&local->iflist_mtx);
4003 ieee80211_recalc_ps_vif(sdata);
4006 if (elems.erp_info) {
4008 erp_value = elems.erp_info[0];
4012 changed |= ieee80211_handle_bss_capability(sdata,
4013 le16_to_cpu(mgmt->u.beacon.capab_info),
4014 erp_valid, erp_value);
4016 mutex_lock(&local->sta_mtx);
4017 sta = sta_info_get(sdata, bssid);
4019 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4021 if (ieee80211_config_bw(sdata, sta,
4022 elems.ht_cap_elem, elems.ht_operation,
4023 elems.vht_operation, elems.he_operation,
4025 mutex_unlock(&local->sta_mtx);
4027 "failed to follow AP %pM bandwidth change, disconnect\n",
4029 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4030 WLAN_REASON_DEAUTH_LEAVING,
4032 ieee80211_report_disconnect(sdata, deauth_buf,
4033 sizeof(deauth_buf), true,
4034 WLAN_REASON_DEAUTH_LEAVING);
4038 if (sta && elems.opmode_notif)
4039 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4041 mutex_unlock(&local->sta_mtx);
4043 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4045 elems.country_elem_len,
4046 elems.pwr_constr_elem,
4047 elems.cisco_dtpc_elem);
4049 ieee80211_bss_info_change_notify(sdata, changed);
4052 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4053 struct sk_buff *skb)
4055 struct ieee80211_rx_status *rx_status;
4056 struct ieee80211_mgmt *mgmt;
4058 struct ieee802_11_elems elems;
4061 rx_status = (struct ieee80211_rx_status *) skb->cb;
4062 mgmt = (struct ieee80211_mgmt *) skb->data;
4063 fc = le16_to_cpu(mgmt->frame_control);
4067 switch (fc & IEEE80211_FCTL_STYPE) {
4068 case IEEE80211_STYPE_BEACON:
4069 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4071 case IEEE80211_STYPE_PROBE_RESP:
4072 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4074 case IEEE80211_STYPE_AUTH:
4075 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4077 case IEEE80211_STYPE_DEAUTH:
4078 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4080 case IEEE80211_STYPE_DISASSOC:
4081 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4083 case IEEE80211_STYPE_ASSOC_RESP:
4084 case IEEE80211_STYPE_REASSOC_RESP:
4085 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4087 case IEEE80211_STYPE_ACTION:
4088 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4089 ies_len = skb->len -
4090 offsetof(struct ieee80211_mgmt,
4091 u.action.u.chan_switch.variable);
4096 /* CSA IE cannot be overridden, no need for BSSID */
4097 ieee802_11_parse_elems(
4098 mgmt->u.action.u.chan_switch.variable,
4099 ies_len, true, &elems, mgmt->bssid, NULL);
4101 if (elems.parse_error)
4104 ieee80211_sta_process_chanswitch(sdata,
4106 rx_status->device_timestamp,
4108 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4109 ies_len = skb->len -
4110 offsetof(struct ieee80211_mgmt,
4111 u.action.u.ext_chan_switch.variable);
4117 * extended CSA IE can't be overridden, no need for
4120 ieee802_11_parse_elems(
4121 mgmt->u.action.u.ext_chan_switch.variable,
4122 ies_len, true, &elems, mgmt->bssid, NULL);
4124 if (elems.parse_error)
4127 /* for the handling code pretend this was also an IE */
4128 elems.ext_chansw_ie =
4129 &mgmt->u.action.u.ext_chan_switch.data;
4131 ieee80211_sta_process_chanswitch(sdata,
4133 rx_status->device_timestamp,
4138 sdata_unlock(sdata);
4141 static void ieee80211_sta_timer(struct timer_list *t)
4143 struct ieee80211_sub_if_data *sdata =
4144 from_timer(sdata, t, u.mgd.timer);
4146 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4149 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4150 u8 *bssid, u8 reason, bool tx)
4152 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4154 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4157 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4161 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4163 struct ieee80211_local *local = sdata->local;
4164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4165 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4169 u16 prepare_tx_duration = 0;
4171 sdata_assert_lock(sdata);
4173 if (WARN_ON_ONCE(!auth_data))
4178 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4179 sdata_info(sdata, "authentication with %pM timed out\n",
4180 auth_data->bss->bssid);
4183 * Most likely AP is not in the range so remove the
4184 * bss struct for that AP.
4186 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4191 if (auth_data->algorithm == WLAN_AUTH_SAE)
4192 prepare_tx_duration =
4193 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4195 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4197 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4198 auth_data->bss->bssid, auth_data->tries,
4199 IEEE80211_AUTH_MAX_TRIES);
4201 auth_data->expected_transaction = 2;
4203 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4204 trans = auth_data->sae_trans;
4205 status = auth_data->sae_status;
4206 auth_data->expected_transaction = trans;
4209 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4210 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4211 IEEE80211_TX_INTFL_MLME_CONN_TX;
4213 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4214 auth_data->data, auth_data->data_len,
4215 auth_data->bss->bssid,
4216 auth_data->bss->bssid, NULL, 0, 0,
4219 if (tx_flags == 0) {
4220 if (auth_data->algorithm == WLAN_AUTH_SAE)
4221 auth_data->timeout = jiffies +
4222 IEEE80211_AUTH_TIMEOUT_SAE;
4224 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4226 auth_data->timeout =
4227 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4230 auth_data->timeout_started = true;
4231 run_again(sdata, auth_data->timeout);
4236 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4238 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4239 struct ieee80211_local *local = sdata->local;
4241 sdata_assert_lock(sdata);
4243 assoc_data->tries++;
4244 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4245 sdata_info(sdata, "association with %pM timed out\n",
4246 assoc_data->bss->bssid);
4249 * Most likely AP is not in the range so remove the
4250 * bss struct for that AP.
4252 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4257 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4258 assoc_data->bss->bssid, assoc_data->tries,
4259 IEEE80211_ASSOC_MAX_TRIES);
4260 ieee80211_send_assoc(sdata);
4262 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4263 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4264 assoc_data->timeout_started = true;
4265 run_again(sdata, assoc_data->timeout);
4267 assoc_data->timeout =
4268 round_jiffies_up(jiffies +
4269 IEEE80211_ASSOC_TIMEOUT_LONG);
4270 assoc_data->timeout_started = true;
4271 run_again(sdata, assoc_data->timeout);
4277 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4278 __le16 fc, bool acked)
4280 struct ieee80211_local *local = sdata->local;
4282 sdata->u.mgd.status_fc = fc;
4283 sdata->u.mgd.status_acked = acked;
4284 sdata->u.mgd.status_received = true;
4286 ieee80211_queue_work(&local->hw, &sdata->work);
4289 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4291 struct ieee80211_local *local = sdata->local;
4292 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4296 if (ifmgd->status_received) {
4297 __le16 fc = ifmgd->status_fc;
4298 bool status_acked = ifmgd->status_acked;
4300 ifmgd->status_received = false;
4301 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4303 if (ifmgd->auth_data->algorithm ==
4305 ifmgd->auth_data->timeout =
4307 IEEE80211_AUTH_TIMEOUT_SAE;
4309 ifmgd->auth_data->timeout =
4311 IEEE80211_AUTH_TIMEOUT_SHORT;
4312 run_again(sdata, ifmgd->auth_data->timeout);
4314 ifmgd->auth_data->timeout = jiffies - 1;
4316 ifmgd->auth_data->timeout_started = true;
4317 } else if (ifmgd->assoc_data &&
4318 (ieee80211_is_assoc_req(fc) ||
4319 ieee80211_is_reassoc_req(fc))) {
4321 ifmgd->assoc_data->timeout =
4322 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4323 run_again(sdata, ifmgd->assoc_data->timeout);
4325 ifmgd->assoc_data->timeout = jiffies - 1;
4327 ifmgd->assoc_data->timeout_started = true;
4331 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4332 time_after(jiffies, ifmgd->auth_data->timeout)) {
4333 if (ifmgd->auth_data->done) {
4335 * ok ... we waited for assoc but userspace didn't,
4336 * so let's just kill the auth data
4338 ieee80211_destroy_auth_data(sdata, false);
4339 } else if (ieee80211_auth(sdata)) {
4341 struct ieee80211_event event = {
4343 .u.mlme.data = AUTH_EVENT,
4344 .u.mlme.status = MLME_TIMEOUT,
4347 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4349 ieee80211_destroy_auth_data(sdata, false);
4351 cfg80211_auth_timeout(sdata->dev, bssid);
4352 drv_event_callback(sdata->local, sdata, &event);
4354 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4355 run_again(sdata, ifmgd->auth_data->timeout);
4357 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4358 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4359 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4360 ieee80211_do_assoc(sdata)) {
4361 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4362 struct ieee80211_event event = {
4364 .u.mlme.data = ASSOC_EVENT,
4365 .u.mlme.status = MLME_TIMEOUT,
4368 ieee80211_destroy_assoc_data(sdata, false, false);
4369 cfg80211_assoc_timeout(sdata->dev, bss);
4370 drv_event_callback(sdata->local, sdata, &event);
4372 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4373 run_again(sdata, ifmgd->assoc_data->timeout);
4375 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4376 ifmgd->associated) {
4380 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4382 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4383 max_tries = max_nullfunc_tries;
4385 max_tries = max_probe_tries;
4387 /* ACK received for nullfunc probing frame */
4388 if (!ifmgd->probe_send_count)
4389 ieee80211_reset_ap_probe(sdata);
4390 else if (ifmgd->nullfunc_failed) {
4391 if (ifmgd->probe_send_count < max_tries) {
4393 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4394 bssid, ifmgd->probe_send_count,
4396 ieee80211_mgd_probe_ap_send(sdata);
4399 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4401 ieee80211_sta_connection_lost(sdata, bssid,
4402 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4405 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4406 run_again(sdata, ifmgd->probe_timeout);
4407 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4409 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4410 bssid, probe_wait_ms);
4411 ieee80211_sta_connection_lost(sdata, bssid,
4412 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4413 } else if (ifmgd->probe_send_count < max_tries) {
4415 "No probe response from AP %pM after %dms, try %d/%i\n",
4416 bssid, probe_wait_ms,
4417 ifmgd->probe_send_count, max_tries);
4418 ieee80211_mgd_probe_ap_send(sdata);
4421 * We actually lost the connection ... or did we?
4425 "No probe response from AP %pM after %dms, disconnecting.\n",
4426 bssid, probe_wait_ms);
4428 ieee80211_sta_connection_lost(sdata, bssid,
4429 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4433 sdata_unlock(sdata);
4436 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4438 struct ieee80211_sub_if_data *sdata =
4439 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4442 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4445 sdata->u.mgd.connection_loss = false;
4446 ieee80211_queue_work(&sdata->local->hw,
4447 &sdata->u.mgd.beacon_connection_loss_work);
4450 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4452 struct ieee80211_sub_if_data *sdata =
4453 from_timer(sdata, t, u.mgd.conn_mon_timer);
4454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4455 struct ieee80211_local *local = sdata->local;
4457 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4460 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4463 static void ieee80211_sta_monitor_work(struct work_struct *work)
4465 struct ieee80211_sub_if_data *sdata =
4466 container_of(work, struct ieee80211_sub_if_data,
4467 u.mgd.monitor_work);
4469 ieee80211_mgd_probe_ap(sdata, false);
4472 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4474 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4475 __ieee80211_stop_poll(sdata);
4477 /* let's probe the connection once */
4478 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4479 ieee80211_queue_work(&sdata->local->hw,
4480 &sdata->u.mgd.monitor_work);
4485 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4487 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4488 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4492 if (ifmgd->auth_data || ifmgd->assoc_data) {
4493 const u8 *bssid = ifmgd->auth_data ?
4494 ifmgd->auth_data->bss->bssid :
4495 ifmgd->assoc_data->bss->bssid;
4498 * If we are trying to authenticate / associate while suspending,
4499 * cfg80211 won't know and won't actually abort those attempts,
4500 * thus we need to do that ourselves.
4502 ieee80211_send_deauth_disassoc(sdata, bssid,
4503 IEEE80211_STYPE_DEAUTH,
4504 WLAN_REASON_DEAUTH_LEAVING,
4506 if (ifmgd->assoc_data)
4507 ieee80211_destroy_assoc_data(sdata, false, true);
4508 if (ifmgd->auth_data)
4509 ieee80211_destroy_auth_data(sdata, false);
4510 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4511 IEEE80211_DEAUTH_FRAME_LEN);
4514 /* This is a bit of a hack - we should find a better and more generic
4515 * solution to this. Normally when suspending, cfg80211 will in fact
4516 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4517 * auth (not so important) or assoc (this is the problem) process.
4519 * As a consequence, it can happen that we are in the process of both
4520 * associating and suspending, and receive an association response
4521 * after cfg80211 has checked if it needs to disconnect, but before
4522 * we actually set the flag to drop incoming frames. This will then
4523 * cause the workqueue flush to process the association response in
4524 * the suspend, resulting in a successful association just before it
4525 * tries to remove the interface from the driver, which now though
4526 * has a channel context assigned ... this results in issues.
4528 * To work around this (for now) simply deauth here again if we're
4531 if (ifmgd->associated && !sdata->local->wowlan) {
4533 struct cfg80211_deauth_request req = {
4534 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4538 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4539 ieee80211_mgd_deauth(sdata, &req);
4542 sdata_unlock(sdata);
4545 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4550 if (!ifmgd->associated) {
4551 sdata_unlock(sdata);
4555 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4556 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4557 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4558 ieee80211_sta_connection_lost(sdata,
4559 ifmgd->associated->bssid,
4560 WLAN_REASON_UNSPECIFIED,
4562 sdata_unlock(sdata);
4565 sdata_unlock(sdata);
4569 /* interface setup */
4570 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4572 struct ieee80211_if_managed *ifmgd;
4574 ifmgd = &sdata->u.mgd;
4575 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4576 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4577 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4578 ieee80211_beacon_connection_loss_work);
4579 INIT_WORK(&ifmgd->csa_connection_drop_work,
4580 ieee80211_csa_connection_drop_work);
4581 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4582 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4583 ieee80211_tdls_peer_del_work);
4584 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4585 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4586 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4587 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4588 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4589 ieee80211_sta_handle_tspec_ac_params_wk);
4592 ifmgd->powersave = sdata->wdev.ps;
4593 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4594 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4595 ifmgd->p2p_noa_index = -1;
4597 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4598 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4600 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4602 /* Setup TDLS data */
4603 spin_lock_init(&ifmgd->teardown_lock);
4604 ifmgd->teardown_skb = NULL;
4605 ifmgd->orig_teardown_skb = NULL;
4608 /* scan finished notification */
4609 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4611 struct ieee80211_sub_if_data *sdata;
4613 /* Restart STA timers */
4615 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4616 if (ieee80211_sdata_running(sdata))
4617 ieee80211_restart_sta_timer(sdata);
4622 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4623 struct cfg80211_bss *cbss)
4625 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4626 const u8 *ht_cap_ie, *vht_cap_ie;
4627 const struct ieee80211_ht_cap *ht_cap;
4628 const struct ieee80211_vht_cap *vht_cap;
4631 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4634 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4635 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4636 ht_cap = (void *)(ht_cap_ie + 2);
4637 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4639 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4640 * "Tx Unequal Modulation Supported" fields.
4644 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4647 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4648 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4652 vht_cap = (void *)(vht_cap_ie + 2);
4653 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4654 for (nss = 8; nss > 0; nss--) {
4655 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4656 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4659 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4660 chains = max(chains, nss);
4667 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4668 const struct ieee80211_he_operation *he_op)
4670 const struct ieee80211_sta_he_cap *sta_he_cap =
4671 ieee80211_get_he_sta_cap(sband);
4675 if (!sta_he_cap || !he_op)
4678 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4680 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4681 for (i = 0; i < 3; i++) {
4682 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4683 &sta_he_cap->he_mcs_nss_supp;
4684 u16 sta_mcs_map_rx =
4685 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4686 u16 sta_mcs_map_tx =
4687 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4689 bool verified = true;
4692 * For each band there is a maximum of 8 spatial streams
4693 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4694 * of 2 bits per NSS (1-8), with the values defined in enum
4695 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4696 * capabilities aren't less than the AP's minimum requirements
4697 * for this HE BSS per SS.
4698 * It is enough to find one such band that meets the reqs.
4700 for (nss = 8; nss > 0; nss--) {
4701 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4702 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4703 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4705 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4709 * Make sure the HE AP doesn't require MCSs that aren't
4710 * supported by the client
4712 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4713 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4714 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4724 /* If here, STA doesn't meet AP's HE min requirements */
4728 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4729 struct cfg80211_bss *cbss)
4731 struct ieee80211_local *local = sdata->local;
4732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4733 const struct ieee80211_ht_cap *ht_cap = NULL;
4734 const struct ieee80211_ht_operation *ht_oper = NULL;
4735 const struct ieee80211_vht_operation *vht_oper = NULL;
4736 const struct ieee80211_he_operation *he_oper = NULL;
4737 struct ieee80211_supported_band *sband;
4738 struct cfg80211_chan_def chandef;
4743 sband = local->hw.wiphy->bands[cbss->channel->band];
4745 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4746 IEEE80211_STA_DISABLE_80P80MHZ |
4747 IEEE80211_STA_DISABLE_160MHZ);
4751 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4752 sband->ht_cap.ht_supported) {
4753 const u8 *ht_oper_ie, *ht_cap_ie;
4755 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4756 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4757 ht_oper = (void *)(ht_oper_ie + 2);
4759 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4760 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4761 ht_cap = (void *)(ht_cap_ie + 2);
4764 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4769 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4770 sband->vht_cap.vht_supported) {
4771 const u8 *vht_oper_ie, *vht_cap;
4773 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4774 WLAN_EID_VHT_OPERATION);
4775 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4776 vht_oper = (void *)(vht_oper_ie + 2);
4777 if (vht_oper && !ht_oper) {
4780 "AP advertised VHT without HT, disabling both\n");
4781 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4782 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4785 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4786 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4787 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4792 if (!ieee80211_get_he_sta_cap(sband))
4793 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4795 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4796 const struct cfg80211_bss_ies *ies;
4797 const u8 *he_oper_ie;
4799 ies = rcu_dereference(cbss->ies);
4800 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4801 ies->data, ies->len);
4803 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4804 he_oper = (void *)(he_oper_ie + 3);
4808 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4809 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4812 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4814 for (i = 0; i < sband->n_channels; i++) {
4815 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4816 IEEE80211_CHAN_NO_80MHZ))
4824 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4826 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4828 ht_oper, vht_oper, he_oper,
4831 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4836 /* will change later if needed */
4837 sdata->smps_mode = IEEE80211_SMPS_OFF;
4839 mutex_lock(&local->mtx);
4841 * If this fails (possibly due to channel context sharing
4842 * on incompatible channels, e.g. 80+80 and 160 sharing the
4843 * same control channel) try to use a smaller bandwidth.
4845 ret = ieee80211_vif_use_channel(sdata, &chandef,
4846 IEEE80211_CHANCTX_SHARED);
4848 /* don't downgrade for 5 and 10 MHz channels, though. */
4849 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4850 chandef.width == NL80211_CHAN_WIDTH_10)
4853 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4854 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4855 ret = ieee80211_vif_use_channel(sdata, &chandef,
4856 IEEE80211_CHANCTX_SHARED);
4859 mutex_unlock(&local->mtx);
4863 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4864 u8 *dtim_count, u8 *dtim_period)
4866 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4867 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4869 const struct ieee80211_tim_ie *tim = NULL;
4870 const struct ieee80211_bssid_index *idx;
4871 bool valid = tim_ie && tim_ie[1] >= 2;
4874 tim = (void *)(tim_ie + 2);
4877 *dtim_count = valid ? tim->dtim_count : 0;
4880 *dtim_period = valid ? tim->dtim_period : 0;
4882 /* Check if value is overridden by non-transmitted profile */
4883 if (!idx_ie || idx_ie[1] < 3)
4886 idx = (void *)(idx_ie + 2);
4889 *dtim_count = idx->dtim_count;
4892 *dtim_period = idx->dtim_period;
4897 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4898 struct cfg80211_bss *cbss, bool assoc,
4901 struct ieee80211_local *local = sdata->local;
4902 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4903 struct ieee80211_bss *bss = (void *)cbss->priv;
4904 struct sta_info *new_sta = NULL;
4905 struct ieee80211_supported_band *sband;
4906 bool have_sta = false;
4909 sband = local->hw.wiphy->bands[cbss->channel->band];
4911 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4914 /* If a reconfig is happening, bail out */
4915 if (local->in_reconfig)
4920 have_sta = sta_info_get(sdata, cbss->bssid);
4925 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4931 * Set up the information for the new channel before setting the
4932 * new channel. We can't - completely race-free - change the basic
4933 * rates bitmap and the channel (sband) that it refers to, but if
4934 * we set it up before we at least avoid calling into the driver's
4935 * bss_info_changed() method with invalid information (since we do
4936 * call that from changing the channel - only for IDLE and perhaps
4937 * some others, but ...).
4939 * So to avoid that, just set up all the new information before the
4940 * channel, but tell the driver to apply it only afterwards, since
4941 * it might need the new channel for that.
4944 u32 rates = 0, basic_rates = 0;
4945 bool have_higher_than_11mbit;
4946 int min_rate = INT_MAX, min_rate_index = -1;
4947 const struct cfg80211_bss_ies *ies;
4948 int shift = ieee80211_vif_get_shift(&sdata->vif);
4950 ieee80211_get_rates(sband, bss->supp_rates,
4951 bss->supp_rates_len,
4952 &rates, &basic_rates,
4953 &have_higher_than_11mbit,
4954 &min_rate, &min_rate_index,
4958 * This used to be a workaround for basic rates missing
4959 * in the association response frame. Now that we no
4960 * longer use the basic rates from there, it probably
4961 * doesn't happen any more, but keep the workaround so
4962 * in case some *other* APs are buggy in different ways
4963 * we can connect -- with a warning.
4965 if (!basic_rates && min_rate_index >= 0) {
4967 "No basic rates, using min rate instead\n");
4968 basic_rates = BIT(min_rate_index);
4972 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4975 "No rates found, keeping mandatory only\n");
4977 sdata->vif.bss_conf.basic_rates = basic_rates;
4979 /* cf. IEEE 802.11 9.2.12 */
4980 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4981 have_higher_than_11mbit)
4982 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4984 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4986 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4988 /* set timing information */
4989 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4991 ies = rcu_dereference(cbss->beacon_ies);
4993 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4994 sdata->vif.bss_conf.sync_device_ts =
4995 bss->device_ts_beacon;
4997 ieee80211_get_dtim(ies,
4998 &sdata->vif.bss_conf.sync_dtim_count,
5000 } else if (!ieee80211_hw_check(&sdata->local->hw,
5001 TIMING_BEACON_ONLY)) {
5002 ies = rcu_dereference(cbss->proberesp_ies);
5003 /* must be non-NULL since beacon IEs were NULL */
5004 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5005 sdata->vif.bss_conf.sync_device_ts =
5006 bss->device_ts_presp;
5007 sdata->vif.bss_conf.sync_dtim_count = 0;
5009 sdata->vif.bss_conf.sync_tsf = 0;
5010 sdata->vif.bss_conf.sync_device_ts = 0;
5011 sdata->vif.bss_conf.sync_dtim_count = 0;
5016 if (new_sta || override) {
5017 err = ieee80211_prep_channel(sdata, cbss);
5020 sta_info_free(local, new_sta);
5027 * tell driver about BSSID, basic rates and timing
5028 * this was set up above, before setting the channel
5030 ieee80211_bss_info_change_notify(sdata,
5031 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5032 BSS_CHANGED_BEACON_INT);
5035 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5037 err = sta_info_insert(new_sta);
5041 "failed to insert STA entry for the AP (error %d)\n",
5046 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5048 /* Cancel scan to ensure that nothing interferes with connection */
5049 if (local->scanning)
5050 ieee80211_scan_cancel(local);
5056 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5057 struct cfg80211_auth_request *req)
5059 struct ieee80211_local *local = sdata->local;
5060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5061 struct ieee80211_mgd_auth_data *auth_data;
5066 /* prepare auth data structure */
5068 switch (req->auth_type) {
5069 case NL80211_AUTHTYPE_OPEN_SYSTEM:
5070 auth_alg = WLAN_AUTH_OPEN;
5072 case NL80211_AUTHTYPE_SHARED_KEY:
5075 auth_alg = WLAN_AUTH_SHARED_KEY;
5077 case NL80211_AUTHTYPE_FT:
5078 auth_alg = WLAN_AUTH_FT;
5080 case NL80211_AUTHTYPE_NETWORK_EAP:
5081 auth_alg = WLAN_AUTH_LEAP;
5083 case NL80211_AUTHTYPE_SAE:
5084 auth_alg = WLAN_AUTH_SAE;
5086 case NL80211_AUTHTYPE_FILS_SK:
5087 auth_alg = WLAN_AUTH_FILS_SK;
5089 case NL80211_AUTHTYPE_FILS_SK_PFS:
5090 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5092 case NL80211_AUTHTYPE_FILS_PK:
5093 auth_alg = WLAN_AUTH_FILS_PK;
5099 if (ifmgd->assoc_data)
5102 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5103 req->ie_len, GFP_KERNEL);
5107 auth_data->bss = req->bss;
5109 if (req->auth_data_len >= 4) {
5110 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5111 __le16 *pos = (__le16 *) req->auth_data;
5113 auth_data->sae_trans = le16_to_cpu(pos[0]);
5114 auth_data->sae_status = le16_to_cpu(pos[1]);
5116 memcpy(auth_data->data, req->auth_data + 4,
5117 req->auth_data_len - 4);
5118 auth_data->data_len += req->auth_data_len - 4;
5121 /* Check if continuing authentication or trying to authenticate with the
5122 * same BSS that we were in the process of authenticating with and avoid
5123 * removal and re-addition of the STA entry in
5124 * ieee80211_prep_connection().
5126 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5128 if (req->ie && req->ie_len) {
5129 memcpy(&auth_data->data[auth_data->data_len],
5130 req->ie, req->ie_len);
5131 auth_data->data_len += req->ie_len;
5134 if (req->key && req->key_len) {
5135 auth_data->key_len = req->key_len;
5136 auth_data->key_idx = req->key_idx;
5137 memcpy(auth_data->key, req->key, req->key_len);
5140 auth_data->algorithm = auth_alg;
5142 /* try to authenticate/probe */
5144 if (ifmgd->auth_data) {
5145 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5146 auth_data->peer_confirmed =
5147 ifmgd->auth_data->peer_confirmed;
5149 ieee80211_destroy_auth_data(sdata, cont_auth);
5152 /* prep auth_data so we don't go into idle on disassoc */
5153 ifmgd->auth_data = auth_data;
5155 /* If this is continuation of an ongoing SAE authentication exchange
5156 * (i.e., request to send SAE Confirm) and the peer has already
5157 * confirmed, mark authentication completed since we are about to send
5160 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5161 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5162 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5164 if (ifmgd->associated) {
5165 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5168 "disconnect from AP %pM for new auth to %pM\n",
5169 ifmgd->associated->bssid, req->bss->bssid);
5170 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5171 WLAN_REASON_UNSPECIFIED,
5174 ieee80211_report_disconnect(sdata, frame_buf,
5175 sizeof(frame_buf), true,
5176 WLAN_REASON_UNSPECIFIED);
5179 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5181 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5185 err = ieee80211_auth(sdata);
5187 sta_info_destroy_addr(sdata, req->bss->bssid);
5191 /* hold our own reference */
5192 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5196 eth_zero_addr(ifmgd->bssid);
5197 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5198 ifmgd->auth_data = NULL;
5199 mutex_lock(&sdata->local->mtx);
5200 ieee80211_vif_release_channel(sdata);
5201 mutex_unlock(&sdata->local->mtx);
5206 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5207 struct cfg80211_assoc_request *req)
5209 struct ieee80211_local *local = sdata->local;
5210 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5211 struct ieee80211_bss *bss = (void *)req->bss->priv;
5212 struct ieee80211_mgd_assoc_data *assoc_data;
5213 const struct cfg80211_bss_ies *beacon_ies;
5214 struct ieee80211_supported_band *sband;
5215 const u8 *ssidie, *ht_ie, *vht_ie;
5217 bool override = false;
5219 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5224 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5230 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5231 assoc_data->ssid_len = ssidie[1];
5234 if (ifmgd->associated) {
5235 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5238 "disconnect from AP %pM for new assoc to %pM\n",
5239 ifmgd->associated->bssid, req->bss->bssid);
5240 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5241 WLAN_REASON_UNSPECIFIED,
5244 ieee80211_report_disconnect(sdata, frame_buf,
5245 sizeof(frame_buf), true,
5246 WLAN_REASON_UNSPECIFIED);
5249 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5254 if (ifmgd->assoc_data) {
5259 if (ifmgd->auth_data) {
5262 /* keep sta info, bssid if matching */
5263 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5264 ieee80211_destroy_auth_data(sdata, match);
5267 /* prepare assoc data */
5269 ifmgd->beacon_crc_valid = false;
5271 assoc_data->wmm = bss->wmm_used &&
5272 (local->hw.queues >= IEEE80211_NUM_ACS);
5275 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5276 * We still associate in non-HT mode (11a/b/g) if any one of these
5277 * ciphers is configured as pairwise.
5278 * We can set this to true for non-11n hardware, that'll be checked
5279 * separately along with the peer capabilities.
5281 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5282 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5283 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5284 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5285 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5286 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5287 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5288 netdev_info(sdata->dev,
5289 "disabling HE/HT/VHT due to WEP/TKIP use\n");
5293 /* Also disable HT if we don't support it or the AP doesn't use WMM */
5294 sband = local->hw.wiphy->bands[req->bss->channel->band];
5295 if (!sband->ht_cap.ht_supported ||
5296 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5297 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5298 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5299 if (!bss->wmm_used &&
5300 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5301 netdev_info(sdata->dev,
5302 "disabling HT as WMM/QoS is not supported by the AP\n");
5305 /* disable VHT if we don't support it or the AP doesn't use WMM */
5306 if (!sband->vht_cap.vht_supported ||
5307 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5308 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5309 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5310 if (!bss->wmm_used &&
5311 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5312 netdev_info(sdata->dev,
5313 "disabling VHT as WMM/QoS is not supported by the AP\n");
5316 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5317 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5318 sizeof(ifmgd->ht_capa_mask));
5320 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5321 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5322 sizeof(ifmgd->vht_capa_mask));
5324 if (req->ie && req->ie_len) {
5325 memcpy(assoc_data->ie, req->ie, req->ie_len);
5326 assoc_data->ie_len = req->ie_len;
5329 if (req->fils_kek) {
5330 /* should already be checked in cfg80211 - so warn */
5331 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5335 memcpy(assoc_data->fils_kek, req->fils_kek,
5337 assoc_data->fils_kek_len = req->fils_kek_len;
5340 if (req->fils_nonces)
5341 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5342 2 * FILS_NONCE_LEN);
5344 assoc_data->bss = req->bss;
5346 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5347 if (ifmgd->powersave)
5348 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5350 sdata->smps_mode = IEEE80211_SMPS_OFF;
5352 sdata->smps_mode = ifmgd->req_smps;
5354 assoc_data->capability = req->bss->capability;
5355 assoc_data->supp_rates = bss->supp_rates;
5356 assoc_data->supp_rates_len = bss->supp_rates_len;
5359 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5360 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5361 assoc_data->ap_ht_param =
5362 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5364 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5365 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5366 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5367 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5368 sizeof(struct ieee80211_vht_cap));
5370 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5373 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5374 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5375 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5376 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5378 if (bss->wmm_used && bss->uapsd_supported &&
5379 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5380 assoc_data->uapsd = true;
5381 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5383 assoc_data->uapsd = false;
5384 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5387 if (req->prev_bssid)
5388 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5391 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5392 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5394 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5395 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5398 if (req->flags & ASSOC_REQ_USE_RRM)
5399 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5401 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5403 if (req->crypto.control_port)
5404 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5406 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5408 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5409 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5410 sdata->control_port_over_nl80211 =
5411 req->crypto.control_port_over_nl80211;
5412 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5415 /* kick off associate process */
5417 ifmgd->assoc_data = assoc_data;
5418 ifmgd->dtim_period = 0;
5419 ifmgd->have_beacon = false;
5421 /* override HT/VHT configuration only if the AP and we support it */
5422 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5423 struct ieee80211_sta_ht_cap sta_ht_cap;
5425 if (req->flags & ASSOC_REQ_DISABLE_HT)
5428 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5429 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5431 /* check for 40 MHz disable override */
5432 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5433 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5434 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5437 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5438 req->flags & ASSOC_REQ_DISABLE_VHT)
5442 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5443 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5444 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5447 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5448 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5450 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5455 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5457 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5460 * Wait up to one beacon interval ...
5461 * should this be more if we miss one?
5463 sdata_info(sdata, "waiting for beacon from %pM\n",
5465 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5466 assoc_data->timeout_started = true;
5467 assoc_data->need_beacon = true;
5468 } else if (beacon_ies) {
5472 ieee80211_get_dtim(beacon_ies, &dtim_count,
5473 &ifmgd->dtim_period);
5475 ifmgd->have_beacon = true;
5476 assoc_data->timeout = jiffies;
5477 assoc_data->timeout_started = true;
5479 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5480 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5481 sdata->vif.bss_conf.sync_device_ts =
5482 bss->device_ts_beacon;
5483 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5486 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5487 beacon_ies->data, beacon_ies->len);
5488 if (ie && ie[1] >= 3)
5489 sdata->vif.bss_conf.profile_periodicity = ie[4];
5491 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5492 beacon_ies->data, beacon_ies->len);
5493 if (ie && ie[1] >= 11 &&
5494 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5495 sdata->vif.bss_conf.ema_ap = true;
5497 assoc_data->timeout = jiffies;
5498 assoc_data->timeout_started = true;
5502 run_again(sdata, assoc_data->timeout);
5504 if (bss->corrupt_data) {
5505 char *corrupt_type = "data";
5506 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5507 if (bss->corrupt_data &
5508 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5509 corrupt_type = "beacon and probe response";
5511 corrupt_type = "beacon";
5512 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5513 corrupt_type = "probe response";
5514 sdata_info(sdata, "associating with AP with corrupt %s\n",
5520 eth_zero_addr(ifmgd->bssid);
5521 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5522 ifmgd->assoc_data = NULL;
5528 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5529 struct cfg80211_deauth_request *req)
5531 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5532 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5533 bool tx = !req->local_state_change;
5535 if (ifmgd->auth_data &&
5536 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5538 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5539 req->bssid, req->reason_code,
5540 ieee80211_get_reason_code_string(req->reason_code));
5542 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5543 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5544 IEEE80211_STYPE_DEAUTH,
5545 req->reason_code, tx,
5547 ieee80211_destroy_auth_data(sdata, false);
5548 ieee80211_report_disconnect(sdata, frame_buf,
5549 sizeof(frame_buf), true,
5555 if (ifmgd->assoc_data &&
5556 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5558 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5559 req->bssid, req->reason_code,
5560 ieee80211_get_reason_code_string(req->reason_code));
5562 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5563 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5564 IEEE80211_STYPE_DEAUTH,
5565 req->reason_code, tx,
5567 ieee80211_destroy_assoc_data(sdata, false, true);
5568 ieee80211_report_disconnect(sdata, frame_buf,
5569 sizeof(frame_buf), true,
5574 if (ifmgd->associated &&
5575 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5577 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5578 req->bssid, req->reason_code,
5579 ieee80211_get_reason_code_string(req->reason_code));
5581 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5582 req->reason_code, tx, frame_buf);
5583 ieee80211_report_disconnect(sdata, frame_buf,
5584 sizeof(frame_buf), true,
5592 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5593 struct cfg80211_disassoc_request *req)
5595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5597 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5600 * cfg80211 should catch this ... but it's racy since
5601 * we can receive a disassoc frame, process it, hand it
5602 * to cfg80211 while that's in a locked section already
5603 * trying to tell us that the user wants to disconnect.
5605 if (ifmgd->associated != req->bss)
5609 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5610 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5612 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5613 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5614 req->reason_code, !req->local_state_change,
5617 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5623 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5625 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5628 * Make sure some work items will not run after this,
5629 * they will not do anything but might not have been
5630 * cancelled when disconnecting.
5632 cancel_work_sync(&ifmgd->monitor_work);
5633 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5634 cancel_work_sync(&ifmgd->request_smps_work);
5635 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5636 cancel_work_sync(&ifmgd->chswitch_work);
5637 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5640 if (ifmgd->assoc_data) {
5641 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5642 ieee80211_destroy_assoc_data(sdata, false, false);
5643 cfg80211_assoc_timeout(sdata->dev, bss);
5645 if (ifmgd->auth_data)
5646 ieee80211_destroy_auth_data(sdata, false);
5647 spin_lock_bh(&ifmgd->teardown_lock);
5648 if (ifmgd->teardown_skb) {
5649 kfree_skb(ifmgd->teardown_skb);
5650 ifmgd->teardown_skb = NULL;
5651 ifmgd->orig_teardown_skb = NULL;
5653 kfree(ifmgd->assoc_req_ies);
5654 ifmgd->assoc_req_ies = NULL;
5655 ifmgd->assoc_req_ies_len = 0;
5656 spin_unlock_bh(&ifmgd->teardown_lock);
5657 del_timer_sync(&ifmgd->timer);
5658 sdata_unlock(sdata);
5661 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5662 enum nl80211_cqm_rssi_threshold_event rssi_event,
5666 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5668 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5670 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5672 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5674 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5676 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5678 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5680 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5682 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);