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 ieee80211_send_nullfunc(sdata->local, sdata, false);
2520 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2521 if (WARN_ON_ONCE(ssid == NULL))
2526 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2528 ifmgd->associated->channel);
2532 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2533 run_again(sdata, ifmgd->probe_timeout);
2536 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2540 bool already = false;
2542 if (!ieee80211_sdata_running(sdata))
2547 if (!ifmgd->associated)
2550 mutex_lock(&sdata->local->mtx);
2552 if (sdata->local->tmp_channel || sdata->local->scanning) {
2553 mutex_unlock(&sdata->local->mtx);
2558 mlme_dbg_ratelimited(sdata,
2559 "detected beacon loss from AP (missed %d beacons) - probing\n",
2562 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2566 * The driver/our work has already reported this event or the
2567 * connection monitoring has kicked in and we have already sent
2568 * a probe request. Or maybe the AP died and the driver keeps
2569 * reporting until we disassociate...
2571 * In either case we have to ignore the current call to this
2572 * function (except for setting the correct probe reason bit)
2573 * because otherwise we would reset the timer every time and
2574 * never check whether we received a probe response!
2576 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2579 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2581 mutex_unlock(&sdata->local->mtx);
2586 mutex_lock(&sdata->local->iflist_mtx);
2587 ieee80211_recalc_ps(sdata->local);
2588 mutex_unlock(&sdata->local->iflist_mtx);
2590 ifmgd->probe_send_count = 0;
2591 ieee80211_mgd_probe_ap_send(sdata);
2593 sdata_unlock(sdata);
2596 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2597 struct ieee80211_vif *vif)
2599 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2600 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2601 struct cfg80211_bss *cbss;
2602 struct sk_buff *skb;
2606 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2609 sdata_assert_lock(sdata);
2611 if (ifmgd->associated)
2612 cbss = ifmgd->associated;
2613 else if (ifmgd->auth_data)
2614 cbss = ifmgd->auth_data->bss;
2615 else if (ifmgd->assoc_data)
2616 cbss = ifmgd->assoc_data->bss;
2621 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2622 if (WARN_ON_ONCE(ssid == NULL))
2627 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2628 (u32) -1, cbss->channel,
2630 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2635 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2637 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2638 const u8 *buf, size_t len, bool tx,
2641 struct ieee80211_event event = {
2643 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2644 .u.mlme.reason = reason,
2648 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2650 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2652 drv_event_callback(sdata->local, sdata, &event);
2655 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2657 struct ieee80211_local *local = sdata->local;
2658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2659 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2663 if (!ifmgd->associated) {
2664 sdata_unlock(sdata);
2668 tx = !sdata->csa_block_tx;
2670 /* AP is probably out of range (or not reachable for another reason) so
2671 * remove the bss struct for that AP.
2673 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2675 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2676 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2678 mutex_lock(&local->mtx);
2679 sdata->vif.csa_active = false;
2680 ifmgd->csa_waiting_bcn = false;
2681 if (sdata->csa_block_tx) {
2682 ieee80211_wake_vif_queues(local, sdata,
2683 IEEE80211_QUEUE_STOP_REASON_CSA);
2684 sdata->csa_block_tx = false;
2686 mutex_unlock(&local->mtx);
2688 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2689 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2691 sdata_unlock(sdata);
2694 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2696 struct ieee80211_sub_if_data *sdata =
2697 container_of(work, struct ieee80211_sub_if_data,
2698 u.mgd.beacon_connection_loss_work);
2699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2701 if (ifmgd->associated)
2702 ifmgd->beacon_loss_count++;
2704 if (ifmgd->connection_loss) {
2705 sdata_info(sdata, "Connection to AP %pM lost\n",
2707 __ieee80211_disconnect(sdata);
2709 ieee80211_mgd_probe_ap(sdata, true);
2713 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2715 struct ieee80211_sub_if_data *sdata =
2716 container_of(work, struct ieee80211_sub_if_data,
2717 u.mgd.csa_connection_drop_work);
2719 __ieee80211_disconnect(sdata);
2722 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2724 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2725 struct ieee80211_hw *hw = &sdata->local->hw;
2727 trace_api_beacon_loss(sdata);
2729 sdata->u.mgd.connection_loss = false;
2730 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2732 EXPORT_SYMBOL(ieee80211_beacon_loss);
2734 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2736 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2737 struct ieee80211_hw *hw = &sdata->local->hw;
2739 trace_api_connection_loss(sdata);
2741 sdata->u.mgd.connection_loss = true;
2742 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2744 EXPORT_SYMBOL(ieee80211_connection_loss);
2747 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2750 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2752 sdata_assert_lock(sdata);
2756 * we are not authenticated yet, the only timer that could be
2757 * running is the timeout for the authentication response which
2758 * which is not relevant anymore.
2760 del_timer_sync(&sdata->u.mgd.timer);
2761 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2763 eth_zero_addr(sdata->u.mgd.bssid);
2764 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2765 sdata->u.mgd.flags = 0;
2766 mutex_lock(&sdata->local->mtx);
2767 ieee80211_vif_release_channel(sdata);
2768 mutex_unlock(&sdata->local->mtx);
2771 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2773 sdata->u.mgd.auth_data = NULL;
2776 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2777 bool assoc, bool abandon)
2779 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2781 sdata_assert_lock(sdata);
2785 * we are not associated yet, the only timer that could be
2786 * running is the timeout for the association response which
2787 * which is not relevant anymore.
2789 del_timer_sync(&sdata->u.mgd.timer);
2790 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2792 eth_zero_addr(sdata->u.mgd.bssid);
2793 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2794 sdata->u.mgd.flags = 0;
2795 sdata->vif.mu_mimo_owner = false;
2797 mutex_lock(&sdata->local->mtx);
2798 ieee80211_vif_release_channel(sdata);
2799 mutex_unlock(&sdata->local->mtx);
2802 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2806 sdata->u.mgd.assoc_data = NULL;
2809 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2810 struct ieee80211_mgmt *mgmt, size_t len)
2812 struct ieee80211_local *local = sdata->local;
2813 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2815 struct ieee802_11_elems elems;
2818 pos = mgmt->u.auth.variable;
2819 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2820 mgmt->bssid, auth_data->bss->bssid);
2821 if (!elems.challenge)
2823 auth_data->expected_transaction = 4;
2824 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2825 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2826 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2827 IEEE80211_TX_INTFL_MLME_CONN_TX;
2828 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2829 elems.challenge - 2, elems.challenge_len + 2,
2830 auth_data->bss->bssid, auth_data->bss->bssid,
2831 auth_data->key, auth_data->key_len,
2832 auth_data->key_idx, tx_flags);
2835 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2839 struct sta_info *sta;
2842 sdata_info(sdata, "authenticated\n");
2843 ifmgd->auth_data->done = true;
2844 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2845 ifmgd->auth_data->timeout_started = true;
2846 run_again(sdata, ifmgd->auth_data->timeout);
2848 /* move station state to auth */
2849 mutex_lock(&sdata->local->sta_mtx);
2850 sta = sta_info_get(sdata, bssid);
2852 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2856 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2857 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2863 mutex_unlock(&sdata->local->sta_mtx);
2867 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2868 struct ieee80211_mgmt *mgmt, size_t len)
2870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2872 u16 auth_alg, auth_transaction, status_code;
2873 struct ieee80211_event event = {
2875 .u.mlme.data = AUTH_EVENT,
2878 sdata_assert_lock(sdata);
2883 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2886 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2888 if (!ether_addr_equal(bssid, mgmt->bssid))
2891 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2892 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2893 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2895 if (auth_alg != ifmgd->auth_data->algorithm ||
2896 (auth_alg != WLAN_AUTH_SAE &&
2897 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2898 (auth_alg == WLAN_AUTH_SAE &&
2899 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2900 auth_transaction > 2))) {
2901 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2902 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2904 ifmgd->auth_data->expected_transaction);
2908 if (status_code != WLAN_STATUS_SUCCESS) {
2909 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2910 mgmt->sa, status_code);
2911 ieee80211_destroy_auth_data(sdata, false);
2912 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2913 event.u.mlme.status = MLME_DENIED;
2914 event.u.mlme.reason = status_code;
2915 drv_event_callback(sdata->local, sdata, &event);
2919 switch (ifmgd->auth_data->algorithm) {
2920 case WLAN_AUTH_OPEN:
2921 case WLAN_AUTH_LEAP:
2924 case WLAN_AUTH_FILS_SK:
2925 case WLAN_AUTH_FILS_SK_PFS:
2926 case WLAN_AUTH_FILS_PK:
2928 case WLAN_AUTH_SHARED_KEY:
2929 if (ifmgd->auth_data->expected_transaction != 4) {
2930 ieee80211_auth_challenge(sdata, mgmt, len);
2931 /* need another frame */
2936 WARN_ONCE(1, "invalid auth alg %d",
2937 ifmgd->auth_data->algorithm);
2941 event.u.mlme.status = MLME_SUCCESS;
2942 drv_event_callback(sdata->local, sdata, &event);
2943 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2944 (auth_transaction == 2 &&
2945 ifmgd->auth_data->expected_transaction == 2)) {
2946 if (!ieee80211_mark_sta_auth(sdata, bssid))
2948 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2949 auth_transaction == 2) {
2950 sdata_info(sdata, "SAE peer confirmed\n");
2951 ifmgd->auth_data->peer_confirmed = true;
2954 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2957 mutex_unlock(&sdata->local->sta_mtx);
2958 /* ignore frame -- wait for timeout */
2961 #define case_WLAN(type) \
2962 case WLAN_REASON_##type: return #type
2964 const char *ieee80211_get_reason_code_string(u16 reason_code)
2966 switch (reason_code) {
2967 case_WLAN(UNSPECIFIED);
2968 case_WLAN(PREV_AUTH_NOT_VALID);
2969 case_WLAN(DEAUTH_LEAVING);
2970 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2971 case_WLAN(DISASSOC_AP_BUSY);
2972 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2973 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2974 case_WLAN(DISASSOC_STA_HAS_LEFT);
2975 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2976 case_WLAN(DISASSOC_BAD_POWER);
2977 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2978 case_WLAN(INVALID_IE);
2979 case_WLAN(MIC_FAILURE);
2980 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2981 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2982 case_WLAN(IE_DIFFERENT);
2983 case_WLAN(INVALID_GROUP_CIPHER);
2984 case_WLAN(INVALID_PAIRWISE_CIPHER);
2985 case_WLAN(INVALID_AKMP);
2986 case_WLAN(UNSUPP_RSN_VERSION);
2987 case_WLAN(INVALID_RSN_IE_CAP);
2988 case_WLAN(IEEE8021X_FAILED);
2989 case_WLAN(CIPHER_SUITE_REJECTED);
2990 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2991 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2992 case_WLAN(DISASSOC_LOW_ACK);
2993 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2994 case_WLAN(QSTA_LEAVE_QBSS);
2995 case_WLAN(QSTA_NOT_USE);
2996 case_WLAN(QSTA_REQUIRE_SETUP);
2997 case_WLAN(QSTA_TIMEOUT);
2998 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2999 case_WLAN(MESH_PEER_CANCELED);
3000 case_WLAN(MESH_MAX_PEERS);
3001 case_WLAN(MESH_CONFIG);
3002 case_WLAN(MESH_CLOSE);
3003 case_WLAN(MESH_MAX_RETRIES);
3004 case_WLAN(MESH_CONFIRM_TIMEOUT);
3005 case_WLAN(MESH_INVALID_GTK);
3006 case_WLAN(MESH_INCONSISTENT_PARAM);
3007 case_WLAN(MESH_INVALID_SECURITY);
3008 case_WLAN(MESH_PATH_ERROR);
3009 case_WLAN(MESH_PATH_NOFORWARD);
3010 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3011 case_WLAN(MAC_EXISTS_IN_MBSS);
3012 case_WLAN(MESH_CHAN_REGULATORY);
3013 case_WLAN(MESH_CHAN);
3014 default: return "<unknown>";
3018 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3019 struct ieee80211_mgmt *mgmt, size_t len)
3021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3022 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3024 sdata_assert_lock(sdata);
3029 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3030 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3034 if (ifmgd->associated &&
3035 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3036 const u8 *bssid = ifmgd->associated->bssid;
3038 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3040 ieee80211_get_reason_code_string(reason_code));
3042 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3044 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3049 if (ifmgd->assoc_data &&
3050 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3051 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3054 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3056 ieee80211_get_reason_code_string(reason_code));
3058 ieee80211_destroy_assoc_data(sdata, false, true);
3060 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3066 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3067 struct ieee80211_mgmt *mgmt, size_t len)
3069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3072 sdata_assert_lock(sdata);
3077 if (!ifmgd->associated ||
3078 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3081 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3083 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3084 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3088 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3089 mgmt->sa, reason_code,
3090 ieee80211_get_reason_code_string(reason_code));
3092 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3094 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3097 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3098 u8 *supp_rates, unsigned int supp_rates_len,
3099 u32 *rates, u32 *basic_rates,
3100 bool *have_higher_than_11mbit,
3101 int *min_rate, int *min_rate_index,
3106 for (i = 0; i < supp_rates_len; i++) {
3107 int rate = supp_rates[i] & 0x7f;
3108 bool is_basic = !!(supp_rates[i] & 0x80);
3110 if ((rate * 5 * (1 << shift)) > 110)
3111 *have_higher_than_11mbit = true;
3114 * Skip HT and VHT BSS membership selectors since they're not
3117 * Note: Even though the membership selector and the basic
3118 * rate flag share the same bit, they are not exactly
3121 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3122 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3125 for (j = 0; j < sband->n_bitrates; j++) {
3126 struct ieee80211_rate *br;
3129 br = &sband->bitrates[j];
3131 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3132 if (brate == rate) {
3135 *basic_rates |= BIT(j);
3136 if ((rate * 5) < *min_rate) {
3137 *min_rate = rate * 5;
3138 *min_rate_index = j;
3146 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3147 const struct ieee802_11_elems *elems)
3149 if (elems->ext_capab_len < 10)
3152 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3155 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3156 IEEE80211_HE_MAC_CAP0_TWT_RES;
3159 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3160 struct sta_info *sta,
3161 struct ieee802_11_elems *elems)
3163 bool twt = ieee80211_twt_req_supported(sta, elems);
3165 if (sdata->vif.bss_conf.twt_requester != twt) {
3166 sdata->vif.bss_conf.twt_requester = twt;
3167 return BSS_CHANGED_TWT;
3172 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3173 struct cfg80211_bss *cbss,
3174 struct ieee80211_mgmt *mgmt, size_t len)
3176 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3177 struct ieee80211_local *local = sdata->local;
3178 struct ieee80211_supported_band *sband;
3179 struct sta_info *sta;
3181 u16 capab_info, aid;
3182 struct ieee802_11_elems elems;
3183 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3184 const struct cfg80211_bss_ies *bss_ies = NULL;
3185 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3190 /* AssocResp and ReassocResp have identical structure */
3192 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3193 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3196 * The 5 MSB of the AID field are reserved
3197 * (802.11-2016 9.4.1.8 AID field)
3201 ifmgd->broken_ap = false;
3203 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3204 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3207 ifmgd->broken_ap = true;
3210 pos = mgmt->u.assoc_resp.variable;
3211 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3212 mgmt->bssid, assoc_data->bss->bssid);
3214 if (!elems.supp_rates) {
3215 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3220 ifmgd->tdls_chan_switch_prohibited =
3221 elems.ext_capab && elems.ext_capab_len >= 5 &&
3222 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3225 * Some APs are erroneously not including some information in their
3226 * (re)association response frames. Try to recover by using the data
3227 * from the beacon or probe response. This seems to afflict mobile
3228 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3229 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3231 if ((assoc_data->wmm && !elems.wmm_param) ||
3232 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3233 (!elems.ht_cap_elem || !elems.ht_operation)) ||
3234 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3235 (!elems.vht_cap_elem || !elems.vht_operation))) {
3236 const struct cfg80211_bss_ies *ies;
3237 struct ieee802_11_elems bss_elems;
3240 ies = rcu_dereference(cbss->ies);
3242 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3248 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3251 assoc_data->bss->bssid);
3252 if (assoc_data->wmm &&
3253 !elems.wmm_param && bss_elems.wmm_param) {
3254 elems.wmm_param = bss_elems.wmm_param;
3256 "AP bug: WMM param missing from AssocResp\n");
3260 * Also check if we requested HT/VHT, otherwise the AP doesn't
3261 * have to include the IEs in the (re)association response.
3263 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3264 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3265 elems.ht_cap_elem = bss_elems.ht_cap_elem;
3267 "AP bug: HT capability missing from AssocResp\n");
3269 if (!elems.ht_operation && bss_elems.ht_operation &&
3270 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3271 elems.ht_operation = bss_elems.ht_operation;
3273 "AP bug: HT operation missing from AssocResp\n");
3275 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3276 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3277 elems.vht_cap_elem = bss_elems.vht_cap_elem;
3279 "AP bug: VHT capa missing from AssocResp\n");
3281 if (!elems.vht_operation && bss_elems.vht_operation &&
3282 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3283 elems.vht_operation = bss_elems.vht_operation;
3285 "AP bug: VHT operation missing from AssocResp\n");
3290 * We previously checked these in the beacon/probe response, so
3291 * they should be present here. This is just a safety net.
3293 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3294 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3296 "HT AP is missing WMM params or HT capability/operation\n");
3301 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3302 (!elems.vht_cap_elem || !elems.vht_operation)) {
3304 "VHT AP is missing VHT capability/operation\n");
3309 mutex_lock(&sdata->local->sta_mtx);
3311 * station info was already allocated and inserted before
3312 * the association and should be available to us
3314 sta = sta_info_get(sdata, cbss->bssid);
3315 if (WARN_ON(!sta)) {
3316 mutex_unlock(&sdata->local->sta_mtx);
3321 sband = ieee80211_get_sband(sdata);
3323 mutex_unlock(&sdata->local->sta_mtx);
3328 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3329 (!elems.he_cap || !elems.he_operation)) {
3330 mutex_unlock(&sdata->local->sta_mtx);
3332 "HE AP is missing HE capability/operation\n");
3337 /* Set up internal HT/VHT capabilities */
3338 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3339 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3340 elems.ht_cap_elem, sta);
3342 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3343 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3344 elems.vht_cap_elem, sta);
3346 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3348 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3353 bss_conf->he_support = sta->sta.he_cap.has_he;
3354 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
3356 bss_conf->he_support = false;
3357 bss_conf->twt_requester = false;
3360 if (bss_conf->he_support) {
3361 bss_conf->bss_color =
3362 le32_get_bits(elems.he_operation->he_oper_params,
3363 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3365 bss_conf->htc_trig_based_pkt_ext =
3366 le32_get_bits(elems.he_operation->he_oper_params,
3367 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3368 bss_conf->frame_time_rts_th =
3369 le32_get_bits(elems.he_operation->he_oper_params,
3370 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3372 bss_conf->multi_sta_back_32bit =
3373 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3374 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3376 bss_conf->ack_enabled =
3377 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3378 IEEE80211_HE_MAC_CAP2_ACK_EN;
3380 bss_conf->uora_exists = !!elems.uora_element;
3381 if (elems.uora_element)
3382 bss_conf->uora_ocw_range = elems.uora_element[0];
3384 /* TODO: OPEN: what happens if BSS color disable is set? */
3387 if (cbss->transmitted_bss) {
3388 bss_conf->nontransmitted = true;
3389 ether_addr_copy(bss_conf->transmitter_bssid,
3390 cbss->transmitted_bss->bssid);
3391 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3392 bss_conf->bssid_index = cbss->bssid_index;
3396 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3397 * in their association response, so ignore that data for our own
3398 * configuration. If it changed since the last beacon, we'll get the
3399 * next beacon and update then.
3403 * If an operating mode notification IE is present, override the
3404 * NSS calculation (that would be done in rate_control_rate_init())
3405 * and use the # of streams from that element.
3407 if (elems.opmode_notif &&
3408 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3411 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3412 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3414 sta->sta.rx_nss = nss;
3417 rate_control_rate_init(sta);
3419 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3420 set_sta_flag(sta, WLAN_STA_MFP);
3421 sta->sta.mfp = true;
3423 sta->sta.mfp = false;
3426 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3428 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3429 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3430 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3433 "failed to move station %pM to desired state\n",
3435 WARN_ON(__sta_info_destroy(sta));
3436 mutex_unlock(&sdata->local->sta_mtx);
3441 mutex_unlock(&sdata->local->sta_mtx);
3444 * Always handle WMM once after association regardless
3445 * of the first value the AP uses. Setting -1 here has
3446 * that effect because the AP values is an unsigned
3449 ifmgd->wmm_last_param_set = -1;
3450 ifmgd->mu_edca_last_param_set = -1;
3452 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3453 ieee80211_set_wmm_default(sdata, false, false);
3454 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3455 elems.wmm_param_len,
3456 elems.mu_edca_param_set)) {
3457 /* still enable QoS since we might have HT/VHT */
3458 ieee80211_set_wmm_default(sdata, false, true);
3459 /* set the disable-WMM flag in this case to disable
3460 * tracking WMM parameter changes in the beacon if
3461 * the parameters weren't actually valid. Doing so
3462 * avoids changing parameters very strangely when
3463 * the AP is going back and forth between valid and
3464 * invalid parameters.
3466 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3468 changed |= BSS_CHANGED_QOS;
3470 if (elems.max_idle_period_ie) {
3471 bss_conf->max_idle_period =
3472 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3473 bss_conf->protected_keep_alive =
3474 !!(elems.max_idle_period_ie->idle_options &
3475 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3476 changed |= BSS_CHANGED_KEEP_ALIVE;
3478 bss_conf->max_idle_period = 0;
3479 bss_conf->protected_keep_alive = false;
3482 /* set AID and assoc capability,
3483 * ieee80211_set_associated() will tell the driver */
3484 bss_conf->aid = aid;
3485 bss_conf->assoc_capability = capab_info;
3486 ieee80211_set_associated(sdata, cbss, changed);
3489 * If we're using 4-addr mode, let the AP know that we're
3490 * doing so, so that it can create the STA VLAN on its side
3492 if (ifmgd->use_4addr)
3493 ieee80211_send_4addr_nullfunc(local, sdata);
3496 * Start timer to probe the connection to the AP now.
3497 * Also start the timer that will detect beacon loss.
3499 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3500 ieee80211_sta_reset_beacon_monitor(sdata);
3508 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3509 struct ieee80211_mgmt *mgmt,
3512 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3513 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3514 u16 capab_info, status_code, aid;
3515 struct ieee802_11_elems elems;
3516 int ac, uapsd_queues = -1;
3519 struct cfg80211_bss *bss;
3520 struct ieee80211_event event = {
3522 .u.mlme.data = ASSOC_EVENT,
3525 sdata_assert_lock(sdata);
3529 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3533 * AssocResp and ReassocResp have identical structure, so process both
3534 * of them in this function.
3540 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3541 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3542 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3543 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3546 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3547 reassoc ? "Rea" : "A", mgmt->sa,
3548 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3550 if (assoc_data->fils_kek_len &&
3551 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3554 pos = mgmt->u.assoc_resp.variable;
3555 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3556 mgmt->bssid, assoc_data->bss->bssid);
3558 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3559 elems.timeout_int &&
3560 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3562 tu = le32_to_cpu(elems.timeout_int->value);
3563 ms = tu * 1024 / 1000;
3565 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3567 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3568 assoc_data->timeout_started = true;
3569 if (ms > IEEE80211_ASSOC_TIMEOUT)
3570 run_again(sdata, assoc_data->timeout);
3574 bss = assoc_data->bss;
3576 if (status_code != WLAN_STATUS_SUCCESS) {
3577 sdata_info(sdata, "%pM denied association (code=%d)\n",
3578 mgmt->sa, status_code);
3579 ieee80211_destroy_assoc_data(sdata, false, false);
3580 event.u.mlme.status = MLME_DENIED;
3581 event.u.mlme.reason = status_code;
3582 drv_event_callback(sdata->local, sdata, &event);
3584 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3585 /* oops -- internal error -- send timeout for now */
3586 ieee80211_destroy_assoc_data(sdata, false, false);
3587 cfg80211_assoc_timeout(sdata->dev, bss);
3590 event.u.mlme.status = MLME_SUCCESS;
3591 drv_event_callback(sdata->local, sdata, &event);
3592 sdata_info(sdata, "associated\n");
3595 * destroy assoc_data afterwards, as otherwise an idle
3596 * recalc after assoc_data is NULL but before associated
3597 * is set can cause the interface to go idle
3599 ieee80211_destroy_assoc_data(sdata, true, false);
3601 /* get uapsd queues configuration */
3603 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3604 if (sdata->tx_conf[ac].uapsd)
3605 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3608 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3609 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3612 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3613 struct ieee80211_mgmt *mgmt, size_t len,
3614 struct ieee80211_rx_status *rx_status)
3616 struct ieee80211_local *local = sdata->local;
3617 struct ieee80211_bss *bss;
3618 struct ieee80211_channel *channel;
3620 sdata_assert_lock(sdata);
3622 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3626 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3628 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3629 ieee80211_rx_bss_put(local, bss);
3634 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3635 struct sk_buff *skb)
3637 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3638 struct ieee80211_if_managed *ifmgd;
3639 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3640 size_t baselen, len = skb->len;
3642 ifmgd = &sdata->u.mgd;
3644 sdata_assert_lock(sdata);
3646 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3647 return; /* ignore ProbeResp to foreign address */
3649 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3653 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3655 if (ifmgd->associated &&
3656 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3657 ieee80211_reset_ap_probe(sdata);
3661 * This is the canonical list of information elements we care about,
3662 * the filter code also gives us all changes to the Microsoft OUI
3663 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3664 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3665 * changes to requested client power.
3667 * We implement beacon filtering in software since that means we can
3668 * avoid processing the frame here and in cfg80211, and userspace
3669 * will not be able to tell whether the hardware supports it or not.
3671 * XXX: This list needs to be dynamic -- userspace needs to be able to
3672 * add items it requires. It also needs to be able to tell us to
3673 * look out for other vendor IEs.
3675 static const u64 care_about_ies =
3676 (1ULL << WLAN_EID_COUNTRY) |
3677 (1ULL << WLAN_EID_ERP_INFO) |
3678 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3679 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3680 (1ULL << WLAN_EID_HT_CAPABILITY) |
3681 (1ULL << WLAN_EID_HT_OPERATION) |
3682 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3684 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3685 struct ieee80211_if_managed *ifmgd,
3686 struct ieee80211_bss_conf *bss_conf,
3687 struct ieee80211_local *local,
3688 struct ieee80211_rx_status *rx_status)
3690 /* Track average RSSI from the Beacon frames of the current AP */
3692 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3693 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3694 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3695 ifmgd->last_cqm_event_signal = 0;
3696 ifmgd->count_beacon_signal = 1;
3697 ifmgd->last_ave_beacon_signal = 0;
3699 ifmgd->count_beacon_signal++;
3702 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3704 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3705 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3706 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3707 int last_sig = ifmgd->last_ave_beacon_signal;
3708 struct ieee80211_event event = {
3713 * if signal crosses either of the boundaries, invoke callback
3714 * with appropriate parameters
3716 if (sig > ifmgd->rssi_max_thold &&
3717 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3718 ifmgd->last_ave_beacon_signal = sig;
3719 event.u.rssi.data = RSSI_EVENT_HIGH;
3720 drv_event_callback(local, sdata, &event);
3721 } else if (sig < ifmgd->rssi_min_thold &&
3722 (last_sig >= ifmgd->rssi_max_thold ||
3724 ifmgd->last_ave_beacon_signal = sig;
3725 event.u.rssi.data = RSSI_EVENT_LOW;
3726 drv_event_callback(local, sdata, &event);
3730 if (bss_conf->cqm_rssi_thold &&
3731 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3732 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3733 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3734 int last_event = ifmgd->last_cqm_event_signal;
3735 int thold = bss_conf->cqm_rssi_thold;
3736 int hyst = bss_conf->cqm_rssi_hyst;
3739 (last_event == 0 || sig < last_event - hyst)) {
3740 ifmgd->last_cqm_event_signal = sig;
3741 ieee80211_cqm_rssi_notify(
3743 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3745 } else if (sig > thold &&
3746 (last_event == 0 || sig > last_event + hyst)) {
3747 ifmgd->last_cqm_event_signal = sig;
3748 ieee80211_cqm_rssi_notify(
3750 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3755 if (bss_conf->cqm_rssi_low &&
3756 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3757 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3758 int last_event = ifmgd->last_cqm_event_signal;
3759 int low = bss_conf->cqm_rssi_low;
3760 int high = bss_conf->cqm_rssi_high;
3763 (last_event == 0 || last_event >= low)) {
3764 ifmgd->last_cqm_event_signal = sig;
3765 ieee80211_cqm_rssi_notify(
3767 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3769 } else if (sig > high &&
3770 (last_event == 0 || last_event <= high)) {
3771 ifmgd->last_cqm_event_signal = sig;
3772 ieee80211_cqm_rssi_notify(
3774 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3780 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3781 struct cfg80211_bss *bss)
3783 if (ether_addr_equal(tx_bssid, bss->bssid))
3785 if (!bss->transmitted_bss)
3787 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3790 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3791 struct ieee80211_mgmt *mgmt, size_t len,
3792 struct ieee80211_rx_status *rx_status)
3794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3795 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3797 struct ieee802_11_elems elems;
3798 struct ieee80211_local *local = sdata->local;
3799 struct ieee80211_chanctx_conf *chanctx_conf;
3800 struct ieee80211_channel *chan;
3801 struct sta_info *sta;
3807 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3809 sdata_assert_lock(sdata);
3811 /* Process beacon from the current BSS */
3812 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3817 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3818 if (!chanctx_conf) {
3823 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3827 chan = chanctx_conf->def.chan;
3830 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3831 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3832 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3833 len - baselen, false, &elems,
3835 ifmgd->assoc_data->bss->bssid);
3837 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3839 if (elems.dtim_period)
3840 ifmgd->dtim_period = elems.dtim_period;
3841 ifmgd->have_beacon = true;
3842 ifmgd->assoc_data->need_beacon = false;
3843 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3844 sdata->vif.bss_conf.sync_tsf =
3845 le64_to_cpu(mgmt->u.beacon.timestamp);
3846 sdata->vif.bss_conf.sync_device_ts =
3847 rx_status->device_timestamp;
3848 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3851 if (elems.mbssid_config_ie)
3852 bss_conf->profile_periodicity =
3853 elems.mbssid_config_ie->profile_periodicity;
3855 if (elems.ext_capab_len >= 11 &&
3856 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3857 bss_conf->ema_ap = true;
3859 /* continue assoc process */
3860 ifmgd->assoc_data->timeout = jiffies;
3861 ifmgd->assoc_data->timeout_started = true;
3862 run_again(sdata, ifmgd->assoc_data->timeout);
3866 if (!ifmgd->associated ||
3867 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated))
3869 bssid = ifmgd->associated->bssid;
3871 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3872 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3875 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3876 mlme_dbg_ratelimited(sdata,
3877 "cancelling AP probe due to a received beacon\n");
3878 ieee80211_reset_ap_probe(sdata);
3882 * Push the beacon loss detection into the future since
3883 * we are processing a beacon from the AP just now.
3885 ieee80211_sta_reset_beacon_monitor(sdata);
3887 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3888 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3889 len - baselen, false, &elems,
3890 care_about_ies, ncrc,
3891 mgmt->bssid, bssid);
3893 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3894 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3895 if (local->hw.conf.dynamic_ps_timeout > 0) {
3896 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3897 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3898 ieee80211_hw_config(local,
3899 IEEE80211_CONF_CHANGE_PS);
3901 ieee80211_send_nullfunc(local, sdata, false);
3902 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3903 local->pspolling = true;
3906 * Here is assumed that the driver will be
3907 * able to send ps-poll frame and receive a
3908 * response even though power save mode is
3909 * enabled, but some drivers might require
3910 * to disable power save here. This needs
3911 * to be investigated.
3913 ieee80211_send_pspoll(local, sdata);
3917 if (sdata->vif.p2p ||
3918 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3919 struct ieee80211_p2p_noa_attr noa = {};
3922 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3924 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3925 (u8 *) &noa, sizeof(noa));
3927 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3928 /* valid noa_attr and index changed */
3929 sdata->u.mgd.p2p_noa_index = noa.index;
3930 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3931 changed |= BSS_CHANGED_P2P_PS;
3933 * make sure we update all information, the CRC
3934 * mechanism doesn't look at P2P attributes.
3936 ifmgd->beacon_crc_valid = false;
3938 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3939 /* noa_attr not found and we had valid noa_attr before */
3940 sdata->u.mgd.p2p_noa_index = -1;
3941 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3942 changed |= BSS_CHANGED_P2P_PS;
3943 ifmgd->beacon_crc_valid = false;
3947 if (ifmgd->csa_waiting_bcn)
3948 ieee80211_chswitch_post_beacon(sdata);
3951 * Update beacon timing and dtim count on every beacon appearance. This
3952 * will allow the driver to use the most updated values. Do it before
3953 * comparing this one with last received beacon.
3954 * IMPORTANT: These parameters would possibly be out of sync by the time
3955 * the driver will use them. The synchronized view is currently
3956 * guaranteed only in certain callbacks.
3958 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3959 sdata->vif.bss_conf.sync_tsf =
3960 le64_to_cpu(mgmt->u.beacon.timestamp);
3961 sdata->vif.bss_conf.sync_device_ts =
3962 rx_status->device_timestamp;
3963 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3966 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3968 ifmgd->beacon_crc = ncrc;
3969 ifmgd->beacon_crc_valid = true;
3971 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3973 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3974 rx_status->device_timestamp,
3977 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3978 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3979 elems.wmm_param_len,
3980 elems.mu_edca_param_set))
3981 changed |= BSS_CHANGED_QOS;
3984 * If we haven't had a beacon before, tell the driver about the
3985 * DTIM period (and beacon timing if desired) now.
3987 if (!ifmgd->have_beacon) {
3988 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3989 bss_conf->dtim_period = elems.dtim_period ?: 1;
3991 changed |= BSS_CHANGED_BEACON_INFO;
3992 ifmgd->have_beacon = true;
3994 mutex_lock(&local->iflist_mtx);
3995 ieee80211_recalc_ps(local);
3996 mutex_unlock(&local->iflist_mtx);
3998 ieee80211_recalc_ps_vif(sdata);
4001 if (elems.erp_info) {
4003 erp_value = elems.erp_info[0];
4007 changed |= ieee80211_handle_bss_capability(sdata,
4008 le16_to_cpu(mgmt->u.beacon.capab_info),
4009 erp_valid, erp_value);
4011 mutex_lock(&local->sta_mtx);
4012 sta = sta_info_get(sdata, bssid);
4014 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4016 if (ieee80211_config_bw(sdata, sta,
4017 elems.ht_cap_elem, elems.ht_operation,
4018 elems.vht_operation, elems.he_operation,
4020 mutex_unlock(&local->sta_mtx);
4022 "failed to follow AP %pM bandwidth change, disconnect\n",
4024 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4025 WLAN_REASON_DEAUTH_LEAVING,
4027 ieee80211_report_disconnect(sdata, deauth_buf,
4028 sizeof(deauth_buf), true,
4029 WLAN_REASON_DEAUTH_LEAVING);
4033 if (sta && elems.opmode_notif)
4034 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4036 mutex_unlock(&local->sta_mtx);
4038 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4040 elems.country_elem_len,
4041 elems.pwr_constr_elem,
4042 elems.cisco_dtpc_elem);
4044 ieee80211_bss_info_change_notify(sdata, changed);
4047 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4048 struct sk_buff *skb)
4050 struct ieee80211_rx_status *rx_status;
4051 struct ieee80211_mgmt *mgmt;
4053 struct ieee802_11_elems elems;
4056 rx_status = (struct ieee80211_rx_status *) skb->cb;
4057 mgmt = (struct ieee80211_mgmt *) skb->data;
4058 fc = le16_to_cpu(mgmt->frame_control);
4062 switch (fc & IEEE80211_FCTL_STYPE) {
4063 case IEEE80211_STYPE_BEACON:
4064 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4066 case IEEE80211_STYPE_PROBE_RESP:
4067 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4069 case IEEE80211_STYPE_AUTH:
4070 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4072 case IEEE80211_STYPE_DEAUTH:
4073 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4075 case IEEE80211_STYPE_DISASSOC:
4076 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4078 case IEEE80211_STYPE_ASSOC_RESP:
4079 case IEEE80211_STYPE_REASSOC_RESP:
4080 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4082 case IEEE80211_STYPE_ACTION:
4083 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4084 ies_len = skb->len -
4085 offsetof(struct ieee80211_mgmt,
4086 u.action.u.chan_switch.variable);
4091 /* CSA IE cannot be overridden, no need for BSSID */
4092 ieee802_11_parse_elems(
4093 mgmt->u.action.u.chan_switch.variable,
4094 ies_len, true, &elems, mgmt->bssid, NULL);
4096 if (elems.parse_error)
4099 ieee80211_sta_process_chanswitch(sdata,
4101 rx_status->device_timestamp,
4103 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4104 ies_len = skb->len -
4105 offsetof(struct ieee80211_mgmt,
4106 u.action.u.ext_chan_switch.variable);
4112 * extended CSA IE can't be overridden, no need for
4115 ieee802_11_parse_elems(
4116 mgmt->u.action.u.ext_chan_switch.variable,
4117 ies_len, true, &elems, mgmt->bssid, NULL);
4119 if (elems.parse_error)
4122 /* for the handling code pretend this was also an IE */
4123 elems.ext_chansw_ie =
4124 &mgmt->u.action.u.ext_chan_switch.data;
4126 ieee80211_sta_process_chanswitch(sdata,
4128 rx_status->device_timestamp,
4133 sdata_unlock(sdata);
4136 static void ieee80211_sta_timer(struct timer_list *t)
4138 struct ieee80211_sub_if_data *sdata =
4139 from_timer(sdata, t, u.mgd.timer);
4141 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4144 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4145 u8 *bssid, u8 reason, bool tx)
4147 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4149 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4152 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4156 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4158 struct ieee80211_local *local = sdata->local;
4159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4160 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4164 u16 prepare_tx_duration = 0;
4166 sdata_assert_lock(sdata);
4168 if (WARN_ON_ONCE(!auth_data))
4173 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4174 sdata_info(sdata, "authentication with %pM timed out\n",
4175 auth_data->bss->bssid);
4178 * Most likely AP is not in the range so remove the
4179 * bss struct for that AP.
4181 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4186 if (auth_data->algorithm == WLAN_AUTH_SAE)
4187 prepare_tx_duration =
4188 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4190 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4192 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4193 auth_data->bss->bssid, auth_data->tries,
4194 IEEE80211_AUTH_MAX_TRIES);
4196 auth_data->expected_transaction = 2;
4198 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4199 trans = auth_data->sae_trans;
4200 status = auth_data->sae_status;
4201 auth_data->expected_transaction = trans;
4204 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4205 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4206 IEEE80211_TX_INTFL_MLME_CONN_TX;
4208 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4209 auth_data->data, auth_data->data_len,
4210 auth_data->bss->bssid,
4211 auth_data->bss->bssid, NULL, 0, 0,
4214 if (tx_flags == 0) {
4215 if (auth_data->algorithm == WLAN_AUTH_SAE)
4216 auth_data->timeout = jiffies +
4217 IEEE80211_AUTH_TIMEOUT_SAE;
4219 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4221 auth_data->timeout =
4222 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4225 auth_data->timeout_started = true;
4226 run_again(sdata, auth_data->timeout);
4231 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4233 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4234 struct ieee80211_local *local = sdata->local;
4236 sdata_assert_lock(sdata);
4238 assoc_data->tries++;
4239 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4240 sdata_info(sdata, "association with %pM timed out\n",
4241 assoc_data->bss->bssid);
4244 * Most likely AP is not in the range so remove the
4245 * bss struct for that AP.
4247 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4252 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4253 assoc_data->bss->bssid, assoc_data->tries,
4254 IEEE80211_ASSOC_MAX_TRIES);
4255 ieee80211_send_assoc(sdata);
4257 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4258 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4259 assoc_data->timeout_started = true;
4260 run_again(sdata, assoc_data->timeout);
4262 assoc_data->timeout =
4263 round_jiffies_up(jiffies +
4264 IEEE80211_ASSOC_TIMEOUT_LONG);
4265 assoc_data->timeout_started = true;
4266 run_again(sdata, assoc_data->timeout);
4272 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4273 __le16 fc, bool acked)
4275 struct ieee80211_local *local = sdata->local;
4277 sdata->u.mgd.status_fc = fc;
4278 sdata->u.mgd.status_acked = acked;
4279 sdata->u.mgd.status_received = true;
4281 ieee80211_queue_work(&local->hw, &sdata->work);
4284 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4286 struct ieee80211_local *local = sdata->local;
4287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4291 if (ifmgd->status_received) {
4292 __le16 fc = ifmgd->status_fc;
4293 bool status_acked = ifmgd->status_acked;
4295 ifmgd->status_received = false;
4296 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4298 if (ifmgd->auth_data->algorithm ==
4300 ifmgd->auth_data->timeout =
4302 IEEE80211_AUTH_TIMEOUT_SAE;
4304 ifmgd->auth_data->timeout =
4306 IEEE80211_AUTH_TIMEOUT_SHORT;
4307 run_again(sdata, ifmgd->auth_data->timeout);
4309 ifmgd->auth_data->timeout = jiffies - 1;
4311 ifmgd->auth_data->timeout_started = true;
4312 } else if (ifmgd->assoc_data &&
4313 (ieee80211_is_assoc_req(fc) ||
4314 ieee80211_is_reassoc_req(fc))) {
4316 ifmgd->assoc_data->timeout =
4317 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4318 run_again(sdata, ifmgd->assoc_data->timeout);
4320 ifmgd->assoc_data->timeout = jiffies - 1;
4322 ifmgd->assoc_data->timeout_started = true;
4326 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4327 time_after(jiffies, ifmgd->auth_data->timeout)) {
4328 if (ifmgd->auth_data->done) {
4330 * ok ... we waited for assoc but userspace didn't,
4331 * so let's just kill the auth data
4333 ieee80211_destroy_auth_data(sdata, false);
4334 } else if (ieee80211_auth(sdata)) {
4336 struct ieee80211_event event = {
4338 .u.mlme.data = AUTH_EVENT,
4339 .u.mlme.status = MLME_TIMEOUT,
4342 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4344 ieee80211_destroy_auth_data(sdata, false);
4346 cfg80211_auth_timeout(sdata->dev, bssid);
4347 drv_event_callback(sdata->local, sdata, &event);
4349 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4350 run_again(sdata, ifmgd->auth_data->timeout);
4352 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4353 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4354 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4355 ieee80211_do_assoc(sdata)) {
4356 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4357 struct ieee80211_event event = {
4359 .u.mlme.data = ASSOC_EVENT,
4360 .u.mlme.status = MLME_TIMEOUT,
4363 ieee80211_destroy_assoc_data(sdata, false, false);
4364 cfg80211_assoc_timeout(sdata->dev, bss);
4365 drv_event_callback(sdata->local, sdata, &event);
4367 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4368 run_again(sdata, ifmgd->assoc_data->timeout);
4370 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4371 ifmgd->associated) {
4375 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4377 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4378 max_tries = max_nullfunc_tries;
4380 max_tries = max_probe_tries;
4382 /* ACK received for nullfunc probing frame */
4383 if (!ifmgd->probe_send_count)
4384 ieee80211_reset_ap_probe(sdata);
4385 else if (ifmgd->nullfunc_failed) {
4386 if (ifmgd->probe_send_count < max_tries) {
4388 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4389 bssid, ifmgd->probe_send_count,
4391 ieee80211_mgd_probe_ap_send(sdata);
4394 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4396 ieee80211_sta_connection_lost(sdata, bssid,
4397 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4400 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4401 run_again(sdata, ifmgd->probe_timeout);
4402 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4404 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4405 bssid, probe_wait_ms);
4406 ieee80211_sta_connection_lost(sdata, bssid,
4407 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4408 } else if (ifmgd->probe_send_count < max_tries) {
4410 "No probe response from AP %pM after %dms, try %d/%i\n",
4411 bssid, probe_wait_ms,
4412 ifmgd->probe_send_count, max_tries);
4413 ieee80211_mgd_probe_ap_send(sdata);
4416 * We actually lost the connection ... or did we?
4420 "No probe response from AP %pM after %dms, disconnecting.\n",
4421 bssid, probe_wait_ms);
4423 ieee80211_sta_connection_lost(sdata, bssid,
4424 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4428 sdata_unlock(sdata);
4431 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4433 struct ieee80211_sub_if_data *sdata =
4434 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4435 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4437 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4440 sdata->u.mgd.connection_loss = false;
4441 ieee80211_queue_work(&sdata->local->hw,
4442 &sdata->u.mgd.beacon_connection_loss_work);
4445 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4447 struct ieee80211_sub_if_data *sdata =
4448 from_timer(sdata, t, u.mgd.conn_mon_timer);
4449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4450 struct ieee80211_local *local = sdata->local;
4452 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4455 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4458 static void ieee80211_sta_monitor_work(struct work_struct *work)
4460 struct ieee80211_sub_if_data *sdata =
4461 container_of(work, struct ieee80211_sub_if_data,
4462 u.mgd.monitor_work);
4464 ieee80211_mgd_probe_ap(sdata, false);
4467 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4469 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4470 __ieee80211_stop_poll(sdata);
4472 /* let's probe the connection once */
4473 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4474 ieee80211_queue_work(&sdata->local->hw,
4475 &sdata->u.mgd.monitor_work);
4480 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4482 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4483 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4487 if (ifmgd->auth_data || ifmgd->assoc_data) {
4488 const u8 *bssid = ifmgd->auth_data ?
4489 ifmgd->auth_data->bss->bssid :
4490 ifmgd->assoc_data->bss->bssid;
4493 * If we are trying to authenticate / associate while suspending,
4494 * cfg80211 won't know and won't actually abort those attempts,
4495 * thus we need to do that ourselves.
4497 ieee80211_send_deauth_disassoc(sdata, bssid,
4498 IEEE80211_STYPE_DEAUTH,
4499 WLAN_REASON_DEAUTH_LEAVING,
4501 if (ifmgd->assoc_data)
4502 ieee80211_destroy_assoc_data(sdata, false, true);
4503 if (ifmgd->auth_data)
4504 ieee80211_destroy_auth_data(sdata, false);
4505 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4506 IEEE80211_DEAUTH_FRAME_LEN);
4509 /* This is a bit of a hack - we should find a better and more generic
4510 * solution to this. Normally when suspending, cfg80211 will in fact
4511 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4512 * auth (not so important) or assoc (this is the problem) process.
4514 * As a consequence, it can happen that we are in the process of both
4515 * associating and suspending, and receive an association response
4516 * after cfg80211 has checked if it needs to disconnect, but before
4517 * we actually set the flag to drop incoming frames. This will then
4518 * cause the workqueue flush to process the association response in
4519 * the suspend, resulting in a successful association just before it
4520 * tries to remove the interface from the driver, which now though
4521 * has a channel context assigned ... this results in issues.
4523 * To work around this (for now) simply deauth here again if we're
4526 if (ifmgd->associated && !sdata->local->wowlan) {
4528 struct cfg80211_deauth_request req = {
4529 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4533 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4534 ieee80211_mgd_deauth(sdata, &req);
4537 sdata_unlock(sdata);
4540 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4545 if (!ifmgd->associated) {
4546 sdata_unlock(sdata);
4550 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4551 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4552 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4553 ieee80211_sta_connection_lost(sdata,
4554 ifmgd->associated->bssid,
4555 WLAN_REASON_UNSPECIFIED,
4557 sdata_unlock(sdata);
4560 sdata_unlock(sdata);
4564 /* interface setup */
4565 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4567 struct ieee80211_if_managed *ifmgd;
4569 ifmgd = &sdata->u.mgd;
4570 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4571 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4572 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4573 ieee80211_beacon_connection_loss_work);
4574 INIT_WORK(&ifmgd->csa_connection_drop_work,
4575 ieee80211_csa_connection_drop_work);
4576 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4577 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4578 ieee80211_tdls_peer_del_work);
4579 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4580 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4581 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4582 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4583 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4584 ieee80211_sta_handle_tspec_ac_params_wk);
4587 ifmgd->powersave = sdata->wdev.ps;
4588 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4589 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4590 ifmgd->p2p_noa_index = -1;
4592 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4593 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4595 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4597 /* Setup TDLS data */
4598 spin_lock_init(&ifmgd->teardown_lock);
4599 ifmgd->teardown_skb = NULL;
4600 ifmgd->orig_teardown_skb = NULL;
4603 /* scan finished notification */
4604 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4606 struct ieee80211_sub_if_data *sdata;
4608 /* Restart STA timers */
4610 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4611 if (ieee80211_sdata_running(sdata))
4612 ieee80211_restart_sta_timer(sdata);
4617 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4618 struct cfg80211_bss *cbss)
4620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4621 const u8 *ht_cap_ie, *vht_cap_ie;
4622 const struct ieee80211_ht_cap *ht_cap;
4623 const struct ieee80211_vht_cap *vht_cap;
4626 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4629 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4630 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4631 ht_cap = (void *)(ht_cap_ie + 2);
4632 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4634 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4635 * "Tx Unequal Modulation Supported" fields.
4639 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4642 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4643 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4647 vht_cap = (void *)(vht_cap_ie + 2);
4648 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4649 for (nss = 8; nss > 0; nss--) {
4650 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4651 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4654 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4655 chains = max(chains, nss);
4662 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4663 const struct ieee80211_he_operation *he_op)
4665 const struct ieee80211_sta_he_cap *sta_he_cap =
4666 ieee80211_get_he_sta_cap(sband);
4670 if (!sta_he_cap || !he_op)
4673 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4675 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4676 for (i = 0; i < 3; i++) {
4677 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4678 &sta_he_cap->he_mcs_nss_supp;
4679 u16 sta_mcs_map_rx =
4680 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4681 u16 sta_mcs_map_tx =
4682 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4684 bool verified = true;
4687 * For each band there is a maximum of 8 spatial streams
4688 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4689 * of 2 bits per NSS (1-8), with the values defined in enum
4690 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4691 * capabilities aren't less than the AP's minimum requirements
4692 * for this HE BSS per SS.
4693 * It is enough to find one such band that meets the reqs.
4695 for (nss = 8; nss > 0; nss--) {
4696 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4697 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4698 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4700 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4704 * Make sure the HE AP doesn't require MCSs that aren't
4705 * supported by the client
4707 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4708 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4709 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4719 /* If here, STA doesn't meet AP's HE min requirements */
4723 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4724 struct cfg80211_bss *cbss)
4726 struct ieee80211_local *local = sdata->local;
4727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4728 const struct ieee80211_ht_cap *ht_cap = NULL;
4729 const struct ieee80211_ht_operation *ht_oper = NULL;
4730 const struct ieee80211_vht_operation *vht_oper = NULL;
4731 const struct ieee80211_he_operation *he_oper = NULL;
4732 struct ieee80211_supported_band *sband;
4733 struct cfg80211_chan_def chandef;
4738 sband = local->hw.wiphy->bands[cbss->channel->band];
4740 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4741 IEEE80211_STA_DISABLE_80P80MHZ |
4742 IEEE80211_STA_DISABLE_160MHZ);
4746 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4747 sband->ht_cap.ht_supported) {
4748 const u8 *ht_oper_ie, *ht_cap_ie;
4750 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4751 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4752 ht_oper = (void *)(ht_oper_ie + 2);
4754 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4755 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4756 ht_cap = (void *)(ht_cap_ie + 2);
4759 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4764 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4765 sband->vht_cap.vht_supported) {
4766 const u8 *vht_oper_ie, *vht_cap;
4768 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4769 WLAN_EID_VHT_OPERATION);
4770 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4771 vht_oper = (void *)(vht_oper_ie + 2);
4772 if (vht_oper && !ht_oper) {
4775 "AP advertised VHT without HT, disabling both\n");
4776 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4777 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4780 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4781 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4782 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4787 if (!ieee80211_get_he_sta_cap(sband))
4788 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4790 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4791 const struct cfg80211_bss_ies *ies;
4792 const u8 *he_oper_ie;
4794 ies = rcu_dereference(cbss->ies);
4795 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4796 ies->data, ies->len);
4798 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4799 he_oper = (void *)(he_oper_ie + 3);
4803 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4804 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4807 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4809 for (i = 0; i < sband->n_channels; i++) {
4810 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4811 IEEE80211_CHAN_NO_80MHZ))
4819 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4821 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4823 ht_oper, vht_oper, he_oper,
4826 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4831 /* will change later if needed */
4832 sdata->smps_mode = IEEE80211_SMPS_OFF;
4834 mutex_lock(&local->mtx);
4836 * If this fails (possibly due to channel context sharing
4837 * on incompatible channels, e.g. 80+80 and 160 sharing the
4838 * same control channel) try to use a smaller bandwidth.
4840 ret = ieee80211_vif_use_channel(sdata, &chandef,
4841 IEEE80211_CHANCTX_SHARED);
4843 /* don't downgrade for 5 and 10 MHz channels, though. */
4844 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4845 chandef.width == NL80211_CHAN_WIDTH_10)
4848 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4849 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4850 ret = ieee80211_vif_use_channel(sdata, &chandef,
4851 IEEE80211_CHANCTX_SHARED);
4854 mutex_unlock(&local->mtx);
4858 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4859 u8 *dtim_count, u8 *dtim_period)
4861 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4862 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4864 const struct ieee80211_tim_ie *tim = NULL;
4865 const struct ieee80211_bssid_index *idx;
4866 bool valid = tim_ie && tim_ie[1] >= 2;
4869 tim = (void *)(tim_ie + 2);
4872 *dtim_count = valid ? tim->dtim_count : 0;
4875 *dtim_period = valid ? tim->dtim_period : 0;
4877 /* Check if value is overridden by non-transmitted profile */
4878 if (!idx_ie || idx_ie[1] < 3)
4881 idx = (void *)(idx_ie + 2);
4884 *dtim_count = idx->dtim_count;
4887 *dtim_period = idx->dtim_period;
4892 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4893 struct cfg80211_bss *cbss, bool assoc,
4896 struct ieee80211_local *local = sdata->local;
4897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4898 struct ieee80211_bss *bss = (void *)cbss->priv;
4899 struct sta_info *new_sta = NULL;
4900 struct ieee80211_supported_band *sband;
4901 bool have_sta = false;
4904 sband = local->hw.wiphy->bands[cbss->channel->band];
4906 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4909 /* If a reconfig is happening, bail out */
4910 if (local->in_reconfig)
4915 have_sta = sta_info_get(sdata, cbss->bssid);
4920 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4926 * Set up the information for the new channel before setting the
4927 * new channel. We can't - completely race-free - change the basic
4928 * rates bitmap and the channel (sband) that it refers to, but if
4929 * we set it up before we at least avoid calling into the driver's
4930 * bss_info_changed() method with invalid information (since we do
4931 * call that from changing the channel - only for IDLE and perhaps
4932 * some others, but ...).
4934 * So to avoid that, just set up all the new information before the
4935 * channel, but tell the driver to apply it only afterwards, since
4936 * it might need the new channel for that.
4939 u32 rates = 0, basic_rates = 0;
4940 bool have_higher_than_11mbit;
4941 int min_rate = INT_MAX, min_rate_index = -1;
4942 const struct cfg80211_bss_ies *ies;
4943 int shift = ieee80211_vif_get_shift(&sdata->vif);
4945 ieee80211_get_rates(sband, bss->supp_rates,
4946 bss->supp_rates_len,
4947 &rates, &basic_rates,
4948 &have_higher_than_11mbit,
4949 &min_rate, &min_rate_index,
4953 * This used to be a workaround for basic rates missing
4954 * in the association response frame. Now that we no
4955 * longer use the basic rates from there, it probably
4956 * doesn't happen any more, but keep the workaround so
4957 * in case some *other* APs are buggy in different ways
4958 * we can connect -- with a warning.
4960 if (!basic_rates && min_rate_index >= 0) {
4962 "No basic rates, using min rate instead\n");
4963 basic_rates = BIT(min_rate_index);
4967 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4970 "No rates found, keeping mandatory only\n");
4972 sdata->vif.bss_conf.basic_rates = basic_rates;
4974 /* cf. IEEE 802.11 9.2.12 */
4975 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4976 have_higher_than_11mbit)
4977 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4979 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4981 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4983 /* set timing information */
4984 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4986 ies = rcu_dereference(cbss->beacon_ies);
4988 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4989 sdata->vif.bss_conf.sync_device_ts =
4990 bss->device_ts_beacon;
4992 ieee80211_get_dtim(ies,
4993 &sdata->vif.bss_conf.sync_dtim_count,
4995 } else if (!ieee80211_hw_check(&sdata->local->hw,
4996 TIMING_BEACON_ONLY)) {
4997 ies = rcu_dereference(cbss->proberesp_ies);
4998 /* must be non-NULL since beacon IEs were NULL */
4999 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5000 sdata->vif.bss_conf.sync_device_ts =
5001 bss->device_ts_presp;
5002 sdata->vif.bss_conf.sync_dtim_count = 0;
5004 sdata->vif.bss_conf.sync_tsf = 0;
5005 sdata->vif.bss_conf.sync_device_ts = 0;
5006 sdata->vif.bss_conf.sync_dtim_count = 0;
5011 if (new_sta || override) {
5012 err = ieee80211_prep_channel(sdata, cbss);
5015 sta_info_free(local, new_sta);
5022 * tell driver about BSSID, basic rates and timing
5023 * this was set up above, before setting the channel
5025 ieee80211_bss_info_change_notify(sdata,
5026 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5027 BSS_CHANGED_BEACON_INT);
5030 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5032 err = sta_info_insert(new_sta);
5036 "failed to insert STA entry for the AP (error %d)\n",
5041 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5043 /* Cancel scan to ensure that nothing interferes with connection */
5044 if (local->scanning)
5045 ieee80211_scan_cancel(local);
5051 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5052 struct cfg80211_auth_request *req)
5054 struct ieee80211_local *local = sdata->local;
5055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5056 struct ieee80211_mgd_auth_data *auth_data;
5061 /* prepare auth data structure */
5063 switch (req->auth_type) {
5064 case NL80211_AUTHTYPE_OPEN_SYSTEM:
5065 auth_alg = WLAN_AUTH_OPEN;
5067 case NL80211_AUTHTYPE_SHARED_KEY:
5070 auth_alg = WLAN_AUTH_SHARED_KEY;
5072 case NL80211_AUTHTYPE_FT:
5073 auth_alg = WLAN_AUTH_FT;
5075 case NL80211_AUTHTYPE_NETWORK_EAP:
5076 auth_alg = WLAN_AUTH_LEAP;
5078 case NL80211_AUTHTYPE_SAE:
5079 auth_alg = WLAN_AUTH_SAE;
5081 case NL80211_AUTHTYPE_FILS_SK:
5082 auth_alg = WLAN_AUTH_FILS_SK;
5084 case NL80211_AUTHTYPE_FILS_SK_PFS:
5085 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5087 case NL80211_AUTHTYPE_FILS_PK:
5088 auth_alg = WLAN_AUTH_FILS_PK;
5094 if (ifmgd->assoc_data)
5097 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5098 req->ie_len, GFP_KERNEL);
5102 auth_data->bss = req->bss;
5104 if (req->auth_data_len >= 4) {
5105 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5106 __le16 *pos = (__le16 *) req->auth_data;
5108 auth_data->sae_trans = le16_to_cpu(pos[0]);
5109 auth_data->sae_status = le16_to_cpu(pos[1]);
5111 memcpy(auth_data->data, req->auth_data + 4,
5112 req->auth_data_len - 4);
5113 auth_data->data_len += req->auth_data_len - 4;
5116 /* Check if continuing authentication or trying to authenticate with the
5117 * same BSS that we were in the process of authenticating with and avoid
5118 * removal and re-addition of the STA entry in
5119 * ieee80211_prep_connection().
5121 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5123 if (req->ie && req->ie_len) {
5124 memcpy(&auth_data->data[auth_data->data_len],
5125 req->ie, req->ie_len);
5126 auth_data->data_len += req->ie_len;
5129 if (req->key && req->key_len) {
5130 auth_data->key_len = req->key_len;
5131 auth_data->key_idx = req->key_idx;
5132 memcpy(auth_data->key, req->key, req->key_len);
5135 auth_data->algorithm = auth_alg;
5137 /* try to authenticate/probe */
5139 if (ifmgd->auth_data) {
5140 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5141 auth_data->peer_confirmed =
5142 ifmgd->auth_data->peer_confirmed;
5144 ieee80211_destroy_auth_data(sdata, cont_auth);
5147 /* prep auth_data so we don't go into idle on disassoc */
5148 ifmgd->auth_data = auth_data;
5150 /* If this is continuation of an ongoing SAE authentication exchange
5151 * (i.e., request to send SAE Confirm) and the peer has already
5152 * confirmed, mark authentication completed since we are about to send
5155 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5156 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5157 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5159 if (ifmgd->associated) {
5160 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5163 "disconnect from AP %pM for new auth to %pM\n",
5164 ifmgd->associated->bssid, req->bss->bssid);
5165 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5166 WLAN_REASON_UNSPECIFIED,
5169 ieee80211_report_disconnect(sdata, frame_buf,
5170 sizeof(frame_buf), true,
5171 WLAN_REASON_UNSPECIFIED);
5174 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5176 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5180 err = ieee80211_auth(sdata);
5182 sta_info_destroy_addr(sdata, req->bss->bssid);
5186 /* hold our own reference */
5187 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5191 eth_zero_addr(ifmgd->bssid);
5192 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5193 ifmgd->auth_data = NULL;
5194 mutex_lock(&sdata->local->mtx);
5195 ieee80211_vif_release_channel(sdata);
5196 mutex_unlock(&sdata->local->mtx);
5201 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5202 struct cfg80211_assoc_request *req)
5204 struct ieee80211_local *local = sdata->local;
5205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5206 struct ieee80211_bss *bss = (void *)req->bss->priv;
5207 struct ieee80211_mgd_assoc_data *assoc_data;
5208 const struct cfg80211_bss_ies *beacon_ies;
5209 struct ieee80211_supported_band *sband;
5210 const u8 *ssidie, *ht_ie, *vht_ie;
5212 bool override = false;
5214 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5219 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5225 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5226 assoc_data->ssid_len = ssidie[1];
5229 if (ifmgd->associated) {
5230 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5233 "disconnect from AP %pM for new assoc to %pM\n",
5234 ifmgd->associated->bssid, req->bss->bssid);
5235 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5236 WLAN_REASON_UNSPECIFIED,
5239 ieee80211_report_disconnect(sdata, frame_buf,
5240 sizeof(frame_buf), true,
5241 WLAN_REASON_UNSPECIFIED);
5244 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5249 if (ifmgd->assoc_data) {
5254 if (ifmgd->auth_data) {
5257 /* keep sta info, bssid if matching */
5258 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5259 ieee80211_destroy_auth_data(sdata, match);
5262 /* prepare assoc data */
5264 ifmgd->beacon_crc_valid = false;
5266 assoc_data->wmm = bss->wmm_used &&
5267 (local->hw.queues >= IEEE80211_NUM_ACS);
5270 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5271 * We still associate in non-HT mode (11a/b/g) if any one of these
5272 * ciphers is configured as pairwise.
5273 * We can set this to true for non-11n hardware, that'll be checked
5274 * separately along with the peer capabilities.
5276 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5277 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5278 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5279 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5280 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5281 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5282 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5283 netdev_info(sdata->dev,
5284 "disabling HE/HT/VHT due to WEP/TKIP use\n");
5288 /* Also disable HT if we don't support it or the AP doesn't use WMM */
5289 sband = local->hw.wiphy->bands[req->bss->channel->band];
5290 if (!sband->ht_cap.ht_supported ||
5291 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5292 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5293 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5294 if (!bss->wmm_used &&
5295 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5296 netdev_info(sdata->dev,
5297 "disabling HT as WMM/QoS is not supported by the AP\n");
5300 /* disable VHT if we don't support it or the AP doesn't use WMM */
5301 if (!sband->vht_cap.vht_supported ||
5302 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5303 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5304 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5305 if (!bss->wmm_used &&
5306 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5307 netdev_info(sdata->dev,
5308 "disabling VHT as WMM/QoS is not supported by the AP\n");
5311 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5312 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5313 sizeof(ifmgd->ht_capa_mask));
5315 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5316 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5317 sizeof(ifmgd->vht_capa_mask));
5319 if (req->ie && req->ie_len) {
5320 memcpy(assoc_data->ie, req->ie, req->ie_len);
5321 assoc_data->ie_len = req->ie_len;
5324 if (req->fils_kek) {
5325 /* should already be checked in cfg80211 - so warn */
5326 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5330 memcpy(assoc_data->fils_kek, req->fils_kek,
5332 assoc_data->fils_kek_len = req->fils_kek_len;
5335 if (req->fils_nonces)
5336 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5337 2 * FILS_NONCE_LEN);
5339 assoc_data->bss = req->bss;
5341 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5342 if (ifmgd->powersave)
5343 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5345 sdata->smps_mode = IEEE80211_SMPS_OFF;
5347 sdata->smps_mode = ifmgd->req_smps;
5349 assoc_data->capability = req->bss->capability;
5350 assoc_data->supp_rates = bss->supp_rates;
5351 assoc_data->supp_rates_len = bss->supp_rates_len;
5354 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5355 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5356 assoc_data->ap_ht_param =
5357 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5359 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5360 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5361 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5362 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5363 sizeof(struct ieee80211_vht_cap));
5365 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5368 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5369 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5370 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5371 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5373 if (bss->wmm_used && bss->uapsd_supported &&
5374 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5375 assoc_data->uapsd = true;
5376 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5378 assoc_data->uapsd = false;
5379 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5382 if (req->prev_bssid)
5383 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5386 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5387 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5389 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5390 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5393 if (req->flags & ASSOC_REQ_USE_RRM)
5394 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5396 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5398 if (req->crypto.control_port)
5399 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5401 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5403 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5404 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5405 sdata->control_port_over_nl80211 =
5406 req->crypto.control_port_over_nl80211;
5407 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5410 /* kick off associate process */
5412 ifmgd->assoc_data = assoc_data;
5413 ifmgd->dtim_period = 0;
5414 ifmgd->have_beacon = false;
5416 /* override HT/VHT configuration only if the AP and we support it */
5417 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5418 struct ieee80211_sta_ht_cap sta_ht_cap;
5420 if (req->flags & ASSOC_REQ_DISABLE_HT)
5423 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5424 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5426 /* check for 40 MHz disable override */
5427 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5428 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5429 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5432 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5433 req->flags & ASSOC_REQ_DISABLE_VHT)
5437 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5438 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5439 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5442 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5443 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5445 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5450 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5452 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5455 * Wait up to one beacon interval ...
5456 * should this be more if we miss one?
5458 sdata_info(sdata, "waiting for beacon from %pM\n",
5460 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5461 assoc_data->timeout_started = true;
5462 assoc_data->need_beacon = true;
5463 } else if (beacon_ies) {
5467 ieee80211_get_dtim(beacon_ies, &dtim_count,
5468 &ifmgd->dtim_period);
5470 ifmgd->have_beacon = true;
5471 assoc_data->timeout = jiffies;
5472 assoc_data->timeout_started = true;
5474 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5475 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5476 sdata->vif.bss_conf.sync_device_ts =
5477 bss->device_ts_beacon;
5478 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5481 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5482 beacon_ies->data, beacon_ies->len);
5483 if (ie && ie[1] >= 3)
5484 sdata->vif.bss_conf.profile_periodicity = ie[4];
5486 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5487 beacon_ies->data, beacon_ies->len);
5488 if (ie && ie[1] >= 11 &&
5489 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5490 sdata->vif.bss_conf.ema_ap = true;
5492 assoc_data->timeout = jiffies;
5493 assoc_data->timeout_started = true;
5497 run_again(sdata, assoc_data->timeout);
5499 if (bss->corrupt_data) {
5500 char *corrupt_type = "data";
5501 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5502 if (bss->corrupt_data &
5503 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5504 corrupt_type = "beacon and probe response";
5506 corrupt_type = "beacon";
5507 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5508 corrupt_type = "probe response";
5509 sdata_info(sdata, "associating with AP with corrupt %s\n",
5515 eth_zero_addr(ifmgd->bssid);
5516 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5517 ifmgd->assoc_data = NULL;
5523 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5524 struct cfg80211_deauth_request *req)
5526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5527 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5528 bool tx = !req->local_state_change;
5530 if (ifmgd->auth_data &&
5531 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5533 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5534 req->bssid, req->reason_code,
5535 ieee80211_get_reason_code_string(req->reason_code));
5537 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5538 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5539 IEEE80211_STYPE_DEAUTH,
5540 req->reason_code, tx,
5542 ieee80211_destroy_auth_data(sdata, false);
5543 ieee80211_report_disconnect(sdata, frame_buf,
5544 sizeof(frame_buf), true,
5550 if (ifmgd->assoc_data &&
5551 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5553 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5554 req->bssid, req->reason_code,
5555 ieee80211_get_reason_code_string(req->reason_code));
5557 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5558 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5559 IEEE80211_STYPE_DEAUTH,
5560 req->reason_code, tx,
5562 ieee80211_destroy_assoc_data(sdata, false, true);
5563 ieee80211_report_disconnect(sdata, frame_buf,
5564 sizeof(frame_buf), true,
5569 if (ifmgd->associated &&
5570 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5572 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5573 req->bssid, req->reason_code,
5574 ieee80211_get_reason_code_string(req->reason_code));
5576 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5577 req->reason_code, tx, frame_buf);
5578 ieee80211_report_disconnect(sdata, frame_buf,
5579 sizeof(frame_buf), true,
5587 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5588 struct cfg80211_disassoc_request *req)
5590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5592 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5595 * cfg80211 should catch this ... but it's racy since
5596 * we can receive a disassoc frame, process it, hand it
5597 * to cfg80211 while that's in a locked section already
5598 * trying to tell us that the user wants to disconnect.
5600 if (ifmgd->associated != req->bss)
5604 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5605 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5607 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5608 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5609 req->reason_code, !req->local_state_change,
5612 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5618 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5623 * Make sure some work items will not run after this,
5624 * they will not do anything but might not have been
5625 * cancelled when disconnecting.
5627 cancel_work_sync(&ifmgd->monitor_work);
5628 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5629 cancel_work_sync(&ifmgd->request_smps_work);
5630 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5631 cancel_work_sync(&ifmgd->chswitch_work);
5632 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5635 if (ifmgd->assoc_data) {
5636 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5637 ieee80211_destroy_assoc_data(sdata, false, false);
5638 cfg80211_assoc_timeout(sdata->dev, bss);
5640 if (ifmgd->auth_data)
5641 ieee80211_destroy_auth_data(sdata, false);
5642 spin_lock_bh(&ifmgd->teardown_lock);
5643 if (ifmgd->teardown_skb) {
5644 kfree_skb(ifmgd->teardown_skb);
5645 ifmgd->teardown_skb = NULL;
5646 ifmgd->orig_teardown_skb = NULL;
5648 kfree(ifmgd->assoc_req_ies);
5649 ifmgd->assoc_req_ies = NULL;
5650 ifmgd->assoc_req_ies_len = 0;
5651 spin_unlock_bh(&ifmgd->teardown_lock);
5652 del_timer_sync(&ifmgd->timer);
5653 sdata_unlock(sdata);
5656 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5657 enum nl80211_cqm_rssi_threshold_event rssi_event,
5661 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5663 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5665 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5667 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5669 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5671 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5673 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5675 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5677 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);