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 - 2020 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,
149 const struct ieee80211_ht_operation *ht_oper,
150 const struct ieee80211_vht_operation *vht_oper,
151 const struct ieee80211_he_operation *he_oper,
152 const struct ieee80211_s1g_oper_ie *s1g_oper,
153 struct cfg80211_chan_def *chandef, bool tracking)
155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
156 struct cfg80211_chan_def vht_chandef;
157 struct ieee80211_sta_ht_cap sta_ht_cap;
160 memset(chandef, 0, sizeof(struct cfg80211_chan_def));
161 chandef->chan = channel;
162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
163 chandef->center_freq1 = channel->center_freq;
164 chandef->freq1_offset = channel->freq_offset;
166 if (channel->band == NL80211_BAND_6GHZ) {
167 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef))
168 ret = IEEE80211_STA_DISABLE_HT |
169 IEEE80211_STA_DISABLE_VHT |
170 IEEE80211_STA_DISABLE_HE;
173 vht_chandef = *chandef;
175 } else if (sband->band == NL80211_BAND_S1GHZ) {
176 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
178 "Missing S1G Operation Element? Trying operating == primary\n");
179 chandef->width = ieee80211_s1g_channel_width(channel);
182 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ |
183 IEEE80211_STA_DISABLE_VHT |
184 IEEE80211_STA_DISABLE_80P80MHZ |
185 IEEE80211_STA_DISABLE_160MHZ;
189 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
190 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
192 if (!ht_oper || !sta_ht_cap.ht_supported) {
193 ret = IEEE80211_STA_DISABLE_HT |
194 IEEE80211_STA_DISABLE_VHT |
195 IEEE80211_STA_DISABLE_HE;
199 chandef->width = NL80211_CHAN_WIDTH_20;
201 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
203 /* check that channel matches the right operating channel */
204 if (!tracking && channel->center_freq != ht_cfreq) {
206 * It's possible that some APs are confused here;
207 * Netgear WNDR3700 sometimes reports 4 higher than
208 * the actual channel in association responses, but
209 * since we look at probe response/beacon data here
213 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
214 channel->center_freq, ht_cfreq,
215 ht_oper->primary_chan, channel->band);
216 ret = IEEE80211_STA_DISABLE_HT |
217 IEEE80211_STA_DISABLE_VHT |
218 IEEE80211_STA_DISABLE_HE;
222 /* check 40 MHz support, if we have it */
223 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
224 ieee80211_chandef_ht_oper(ht_oper, chandef);
226 /* 40 MHz (and 80 MHz) must be supported for VHT */
227 ret = IEEE80211_STA_DISABLE_VHT;
228 /* also mark 40 MHz disabled */
229 ret |= IEEE80211_STA_DISABLE_40MHZ;
233 if (!vht_oper || !sband->vht_cap.vht_supported) {
234 ret = IEEE80211_STA_DISABLE_VHT;
238 vht_chandef = *chandef;
239 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
240 (le32_to_cpu(he_oper->he_oper_params) &
241 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
242 struct ieee80211_vht_operation he_oper_vht_cap;
245 * Set only first 3 bytes (other 2 aren't used in
246 * ieee80211_chandef_vht_oper() anyway)
248 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
249 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
251 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
252 &he_oper_vht_cap, ht_oper,
254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
256 "HE AP VHT information is invalid, disable HE\n");
257 ret = IEEE80211_STA_DISABLE_HE;
260 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
264 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
266 "AP VHT information is invalid, disable VHT\n");
267 ret = IEEE80211_STA_DISABLE_VHT;
271 if (!cfg80211_chandef_valid(&vht_chandef)) {
272 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
274 "AP VHT information is invalid, disable VHT\n");
275 ret = IEEE80211_STA_DISABLE_VHT;
279 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
284 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
285 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
287 "AP VHT information doesn't match HT, disable VHT\n");
288 ret = IEEE80211_STA_DISABLE_VHT;
292 *chandef = vht_chandef;
298 * When tracking the current AP, don't do any further checks if the
299 * new chandef is identical to the one we're currently using for the
300 * connection. This keeps us from playing ping-pong with regulatory,
301 * without it the following can happen (for example):
302 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
303 * - AP advertises regdom US
304 * - CRDA loads regdom US with 80 MHz prohibited (old database)
305 * - the code below detects an unsupported channel, downgrades, and
306 * we disconnect from the AP in the caller
307 * - disconnect causes CRDA to reload world regdomain and the game
309 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
311 * It seems possible that there are still scenarios with CSA or real
312 * bandwidth changes where a this could happen, but those cases are
313 * less common and wouldn't completely prevent using the AP.
316 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
319 /* don't print the message below for VHT mismatch if VHT is disabled */
320 if (ret & IEEE80211_STA_DISABLE_VHT)
321 vht_chandef = *chandef;
324 * Ignore the DISABLED flag when we're already connected and only
325 * tracking the APs beacon for bandwidth changes - otherwise we
326 * might get disconnected here if we connect to an AP, update our
327 * regulatory information based on the AP's country IE and the
328 * information we have is wrong/outdated and disables the channel
329 * that we're actually using for the connection to the AP.
331 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
333 IEEE80211_CHAN_DISABLED)) {
334 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
335 ret = IEEE80211_STA_DISABLE_HT |
336 IEEE80211_STA_DISABLE_VHT |
337 IEEE80211_STA_DISABLE_HE;
341 ret |= ieee80211_chandef_downgrade(chandef);
344 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
345 IEEE80211_CHAN_NO_HE))
346 ret |= IEEE80211_STA_DISABLE_HE;
348 if (chandef->width != vht_chandef.width && !tracking)
350 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
352 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
356 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
357 struct sta_info *sta,
358 const struct ieee80211_ht_cap *ht_cap,
359 const struct ieee80211_vht_cap *vht_cap,
360 const struct ieee80211_ht_operation *ht_oper,
361 const struct ieee80211_vht_operation *vht_oper,
362 const struct ieee80211_he_operation *he_oper,
363 const struct ieee80211_s1g_oper_ie *s1g_oper,
364 const u8 *bssid, u32 *changed)
366 struct ieee80211_local *local = sdata->local;
367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
368 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
369 struct ieee80211_supported_band *sband =
370 local->hw.wiphy->bands[chan->band];
371 struct cfg80211_chan_def chandef;
374 enum ieee80211_sta_rx_bandwidth new_sta_bw;
375 u32 vht_cap_info = 0;
378 /* if HT was/is disabled, don't track any bandwidth changes */
379 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
382 /* don't check VHT if we associated as non-VHT station */
383 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
386 /* don't check HE if we associated as non-HE station */
387 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
388 !ieee80211_get_he_sta_cap(sband))
391 if (WARN_ON_ONCE(!sta))
395 * if bss configuration changed store the new one -
396 * this may be applicable even if channel is identical
398 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
399 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
400 *changed |= BSS_CHANGED_HT;
401 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
405 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
407 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
408 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info,
409 ht_oper, vht_oper, he_oper,
410 s1g_oper, &chandef, true);
413 * Downgrade the new channel if we associated with restricted
414 * capabilities. For example, if we associated as a 20 MHz STA
415 * to a 40 MHz AP (due to regulatory, capabilities or config
416 * reasons) then switching to a 40 MHz channel now won't do us
417 * any good -- we couldn't use it with the AP.
419 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
420 chandef.width == NL80211_CHAN_WIDTH_80P80)
421 flags |= ieee80211_chandef_downgrade(&chandef);
422 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
423 chandef.width == NL80211_CHAN_WIDTH_160)
424 flags |= ieee80211_chandef_downgrade(&chandef);
425 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
426 chandef.width > NL80211_CHAN_WIDTH_20)
427 flags |= ieee80211_chandef_downgrade(&chandef);
429 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
433 "AP %pM changed bandwidth, new config is %d.%03d MHz, "
434 "width %d (%d.%03d/%d MHz)\n",
435 ifmgd->bssid, chandef.chan->center_freq,
436 chandef.chan->freq_offset, chandef.width,
437 chandef.center_freq1, chandef.freq1_offset,
438 chandef.center_freq2);
440 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
441 IEEE80211_STA_DISABLE_VHT |
442 IEEE80211_STA_DISABLE_HE |
443 IEEE80211_STA_DISABLE_40MHZ |
444 IEEE80211_STA_DISABLE_80P80MHZ |
445 IEEE80211_STA_DISABLE_160MHZ)) ||
446 !cfg80211_chandef_valid(&chandef)) {
448 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
453 switch (chandef.width) {
454 case NL80211_CHAN_WIDTH_20_NOHT:
455 case NL80211_CHAN_WIDTH_20:
456 new_sta_bw = IEEE80211_STA_RX_BW_20;
458 case NL80211_CHAN_WIDTH_40:
459 new_sta_bw = IEEE80211_STA_RX_BW_40;
461 case NL80211_CHAN_WIDTH_80:
462 new_sta_bw = IEEE80211_STA_RX_BW_80;
464 case NL80211_CHAN_WIDTH_80P80:
465 case NL80211_CHAN_WIDTH_160:
466 new_sta_bw = IEEE80211_STA_RX_BW_160;
472 if (new_sta_bw > sta->cur_max_bandwidth)
473 new_sta_bw = sta->cur_max_bandwidth;
475 if (new_sta_bw < sta->sta.bandwidth) {
476 sta->sta.bandwidth = new_sta_bw;
477 rate_control_rate_update(local, sband, sta,
478 IEEE80211_RC_BW_CHANGED);
481 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
484 "AP %pM changed bandwidth to incompatible one - disconnect\n",
489 if (new_sta_bw > sta->sta.bandwidth) {
490 sta->sta.bandwidth = new_sta_bw;
491 rate_control_rate_update(local, sband, sta,
492 IEEE80211_RC_BW_CHANGED);
498 /* frame sending functions */
500 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
501 struct sk_buff *skb, u8 ap_ht_param,
502 struct ieee80211_supported_band *sband,
503 struct ieee80211_channel *channel,
504 enum ieee80211_smps_mode smps)
507 u32 flags = channel->flags;
509 struct ieee80211_sta_ht_cap ht_cap;
511 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
513 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
514 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
516 /* determine capability flags */
519 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
520 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
521 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
522 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
523 cap &= ~IEEE80211_HT_CAP_SGI_40;
526 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
527 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
528 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
529 cap &= ~IEEE80211_HT_CAP_SGI_40;
535 * If 40 MHz was disabled associate as though we weren't
536 * capable of 40 MHz -- some broken APs will never fall
537 * back to trying to transmit in 20 MHz.
539 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
540 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
541 cap &= ~IEEE80211_HT_CAP_SGI_40;
544 /* set SM PS mode properly */
545 cap &= ~IEEE80211_HT_CAP_SM_PS;
547 case IEEE80211_SMPS_AUTOMATIC:
548 case IEEE80211_SMPS_NUM_MODES:
551 case IEEE80211_SMPS_OFF:
552 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
553 IEEE80211_HT_CAP_SM_PS_SHIFT;
555 case IEEE80211_SMPS_STATIC:
556 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
557 IEEE80211_HT_CAP_SM_PS_SHIFT;
559 case IEEE80211_SMPS_DYNAMIC:
560 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
561 IEEE80211_HT_CAP_SM_PS_SHIFT;
565 /* reserve and fill IE */
566 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
567 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
570 /* This function determines vht capability flags for the association
572 * Note - the function may set the owner of the MU-MIMO capability
574 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
576 struct ieee80211_supported_band *sband,
577 struct ieee80211_vht_cap *ap_vht_cap)
579 struct ieee80211_local *local = sdata->local;
582 struct ieee80211_sta_vht_cap vht_cap;
583 u32 mask, ap_bf_sts, our_bf_sts;
585 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
587 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
588 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
590 /* determine capability flags */
593 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
594 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
596 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
597 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
598 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
599 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
602 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
603 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
604 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
608 * Some APs apparently get confused if our capabilities are better
609 * than theirs, so restrict what we advertise in the assoc request.
611 if (!(ap_vht_cap->vht_cap_info &
612 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
613 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
614 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
615 else if (!(ap_vht_cap->vht_cap_info &
616 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
617 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
620 * If some other vif is using the MU-MIMO capablity we cannot associate
621 * using MU-MIMO - this will lead to contradictions in the group-id
623 * Ownership is defined since association request, in order to avoid
624 * simultaneous associations with MU-MIMO.
626 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
627 bool disable_mu_mimo = false;
628 struct ieee80211_sub_if_data *other;
630 list_for_each_entry_rcu(other, &local->interfaces, list) {
631 if (other->vif.mu_mimo_owner) {
632 disable_mu_mimo = true;
637 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
639 sdata->vif.mu_mimo_owner = true;
642 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
644 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
645 our_bf_sts = cap & mask;
647 if (ap_bf_sts < our_bf_sts) {
652 /* reserve and fill IE */
653 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
654 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
657 /* This function determines HE capability flags for the association
660 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
662 struct ieee80211_supported_band *sband)
665 const struct ieee80211_sta_he_cap *he_cap = NULL;
666 struct ieee80211_chanctx_conf *chanctx_conf;
668 bool reg_cap = false;
671 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
672 if (!WARN_ON_ONCE(!chanctx_conf))
673 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
675 IEEE80211_CHAN_NO_HE);
679 he_cap = ieee80211_get_he_sta_cap(sband);
680 if (!he_cap || !reg_cap)
684 * TODO: the 1 added is because this temporarily is under the EXTENSION
685 * IE. Get rid of it when it moves.
688 2 + 1 + sizeof(he_cap->he_cap_elem) +
689 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
690 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
691 he_cap->he_cap_elem.phy_cap_info);
692 pos = skb_put(skb, he_cap_size);
693 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
695 ieee80211_ie_build_he_6ghz_cap(sdata, skb);
698 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
700 struct ieee80211_local *local = sdata->local;
701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
702 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
704 struct ieee80211_mgmt *mgmt;
705 u8 *pos, qos_info, *ie_start;
706 size_t offset = 0, noffset;
707 int i, count, rates_len, supp_rates_len, shift;
709 struct ieee80211_supported_band *sband;
710 struct ieee80211_chanctx_conf *chanctx_conf;
711 struct ieee80211_channel *chan;
714 struct element *ext_capa = NULL;
716 /* we know it's writable, cast away the const */
717 if (assoc_data->ie_len)
718 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
722 sdata_assert_lock(sdata);
725 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
726 if (WARN_ON(!chanctx_conf)) {
730 chan = chanctx_conf->def.chan;
732 sband = local->hw.wiphy->bands[chan->band];
733 shift = ieee80211_vif_get_shift(&sdata->vif);
735 if (assoc_data->supp_rates_len) {
737 * Get all rates supported by the device and the AP as
738 * some APs don't like getting a superset of their rates
739 * in the association request (e.g. D-Link DAP 1353 in
742 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
743 assoc_data->supp_rates,
744 assoc_data->supp_rates_len,
748 * In case AP not provide any supported rates information
749 * before association, we send information element(s) with
750 * all rates that we support.
753 for (i = 0; i < sband->n_bitrates; i++) {
759 skb = alloc_skb(local->hw.extra_tx_headroom +
760 sizeof(*mgmt) + /* bit too much but doesn't matter */
761 2 + assoc_data->ssid_len + /* SSID */
762 4 + rates_len + /* (extended) rates */
763 4 + /* power capability */
764 2 + 2 * sband->n_channels + /* supported channels */
765 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
766 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
767 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
768 sizeof(struct ieee80211_he_mcs_nss_supp) +
769 IEEE80211_HE_PPE_THRES_MAX_LEN +
770 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
771 assoc_data->ie_len + /* extra IEs */
772 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
778 skb_reserve(skb, local->hw.extra_tx_headroom);
780 capab = WLAN_CAPABILITY_ESS;
782 if (sband->band == NL80211_BAND_2GHZ) {
783 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
784 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
787 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
788 capab |= WLAN_CAPABILITY_PRIVACY;
790 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
791 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
792 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
794 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
795 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
797 mgmt = skb_put_zero(skb, 24);
798 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
799 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
800 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
802 listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ?
803 ieee80211_encode_usf(local->hw.conf.listen_interval) :
804 local->hw.conf.listen_interval);
805 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
807 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
808 IEEE80211_STYPE_REASSOC_REQ);
809 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
810 mgmt->u.reassoc_req.listen_interval = listen_int;
811 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
815 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
816 IEEE80211_STYPE_ASSOC_REQ);
817 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
818 mgmt->u.assoc_req.listen_interval = listen_int;
822 pos = skb_put(skb, 2 + assoc_data->ssid_len);
824 *pos++ = WLAN_EID_SSID;
825 *pos++ = assoc_data->ssid_len;
826 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
828 if (sband->band == NL80211_BAND_S1GHZ)
831 /* add all rates which were marked to be used above */
832 supp_rates_len = rates_len;
833 if (supp_rates_len > 8)
836 pos = skb_put(skb, supp_rates_len + 2);
837 *pos++ = WLAN_EID_SUPP_RATES;
838 *pos++ = supp_rates_len;
841 for (i = 0; i < sband->n_bitrates; i++) {
842 if (BIT(i) & rates) {
843 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
851 if (rates_len > count) {
852 pos = skb_put(skb, rates_len - count + 2);
853 *pos++ = WLAN_EID_EXT_SUPP_RATES;
854 *pos++ = rates_len - count;
856 for (i++; i < sband->n_bitrates; i++) {
857 if (BIT(i) & rates) {
859 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
867 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
868 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
869 pos = skb_put(skb, 4);
870 *pos++ = WLAN_EID_PWR_CAPABILITY;
872 *pos++ = 0; /* min tx power */
874 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
878 * Per spec, we shouldn't include the list of channels if we advertise
879 * support for extended channel switching, but we've always done that;
880 * (for now?) apply this restriction only on the (new) 6 GHz band.
882 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
883 (sband->band != NL80211_BAND_6GHZ ||
884 !ext_capa || ext_capa->datalen < 1 ||
885 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
886 /* TODO: get this in reg domain format */
887 pos = skb_put(skb, 2 * sband->n_channels + 2);
888 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
889 *pos++ = 2 * sband->n_channels;
890 for (i = 0; i < sband->n_channels; i++) {
891 *pos++ = ieee80211_frequency_to_channel(
892 sband->channels[i].center_freq);
893 *pos++ = 1; /* one channel in the subband*/
897 /* Set MBSSID support for HE AP if needed */
898 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
899 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len &&
900 ext_capa && ext_capa->datalen >= 3)
901 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
903 /* if present, add any custom IEs that go before HT */
904 if (assoc_data->ie_len) {
905 static const u8 before_ht[] = {
908 WLAN_EID_EXT_SUPP_RATES,
909 WLAN_EID_PWR_CAPABILITY,
910 WLAN_EID_SUPPORTED_CHANNELS,
913 WLAN_EID_RRM_ENABLED_CAPABILITIES,
914 WLAN_EID_MOBILITY_DOMAIN,
915 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
916 WLAN_EID_RIC_DATA, /* reassoc only */
917 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
919 static const u8 after_ric[] = {
920 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
921 WLAN_EID_HT_CAPABILITY,
922 WLAN_EID_BSS_COEX_2040,
923 /* luckily this is almost always there */
924 WLAN_EID_EXT_CAPABILITY,
925 WLAN_EID_QOS_TRAFFIC_CAPA,
926 WLAN_EID_TIM_BCAST_REQ,
927 WLAN_EID_INTERWORKING,
928 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
929 WLAN_EID_VHT_CAPABILITY,
930 WLAN_EID_OPMODE_NOTIF,
933 noffset = ieee80211_ie_split_ric(assoc_data->ie,
936 ARRAY_SIZE(before_ht),
938 ARRAY_SIZE(after_ric),
940 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
944 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
945 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
946 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
948 if (sband->band != NL80211_BAND_6GHZ &&
949 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
950 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
951 sband, chan, sdata->smps_mode);
953 /* if present, add any custom IEs that go before VHT */
954 if (assoc_data->ie_len) {
955 static const u8 before_vht[] = {
957 * no need to list the ones split off before HT
960 WLAN_EID_BSS_COEX_2040,
961 WLAN_EID_EXT_CAPABILITY,
962 WLAN_EID_QOS_TRAFFIC_CAPA,
963 WLAN_EID_TIM_BCAST_REQ,
964 WLAN_EID_INTERWORKING,
965 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
968 /* RIC already taken above, so no need to handle here anymore */
969 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
970 before_vht, ARRAY_SIZE(before_vht),
972 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
976 /* if present, add any custom IEs that go before HE */
977 if (assoc_data->ie_len) {
978 static const u8 before_he[] = {
980 * no need to list the ones split off before VHT
983 WLAN_EID_OPMODE_NOTIF,
984 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
986 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
987 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
988 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
989 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
990 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
991 /* TODO: add 11ah/11aj/11ak elements */
994 /* RIC already taken above, so no need to handle here anymore */
995 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
996 before_he, ARRAY_SIZE(before_he),
998 pos = skb_put(skb, noffset - offset);
999 memcpy(pos, assoc_data->ie + offset, noffset - offset);
1003 if (sband->band != NL80211_BAND_6GHZ &&
1004 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
1005 ieee80211_add_vht_ie(sdata, skb, sband,
1006 &assoc_data->ap_vht_cap);
1009 * If AP doesn't support HT, mark HE as disabled.
1010 * If on the 5GHz band, make sure it supports VHT.
1012 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
1013 (sband->band == NL80211_BAND_5GHZ &&
1014 ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
1015 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
1017 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1018 ieee80211_add_he_ie(sdata, skb, sband);
1020 /* if present, add any custom non-vendor IEs that go after HE */
1021 if (assoc_data->ie_len) {
1022 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1025 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1029 if (assoc_data->wmm) {
1030 if (assoc_data->uapsd) {
1031 qos_info = ifmgd->uapsd_queues;
1032 qos_info |= (ifmgd->uapsd_max_sp_len <<
1033 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1038 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1041 if (sband->band == NL80211_BAND_S1GHZ) {
1042 ieee80211_add_aid_request_ie(sdata, skb);
1043 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
1046 /* add any remaining custom (i.e. vendor specific here) IEs */
1047 if (assoc_data->ie_len) {
1048 noffset = assoc_data->ie_len;
1049 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1052 if (assoc_data->fils_kek_len &&
1053 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
1058 pos = skb_tail_pointer(skb);
1059 kfree(ifmgd->assoc_req_ies);
1060 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1061 ifmgd->assoc_req_ies_len = pos - ie_start;
1063 drv_mgd_prepare_tx(local, sdata, 0);
1065 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1066 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1067 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1068 IEEE80211_TX_INTFL_MLME_CONN_TX;
1069 ieee80211_tx_skb(sdata, skb);
1072 void ieee80211_send_pspoll(struct ieee80211_local *local,
1073 struct ieee80211_sub_if_data *sdata)
1075 struct ieee80211_pspoll *pspoll;
1076 struct sk_buff *skb;
1078 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1082 pspoll = (struct ieee80211_pspoll *) skb->data;
1083 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1085 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1086 ieee80211_tx_skb(sdata, skb);
1089 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1090 struct ieee80211_sub_if_data *sdata,
1093 struct sk_buff *skb;
1094 struct ieee80211_hdr_3addr *nullfunc;
1095 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1097 /* Don't send NDPs when STA is connected HE */
1098 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1099 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1102 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1103 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1107 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1109 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1111 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1112 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1114 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1115 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1117 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1118 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1120 ieee80211_tx_skb(sdata, skb);
1123 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1124 struct ieee80211_sub_if_data *sdata)
1126 struct sk_buff *skb;
1127 struct ieee80211_hdr *nullfunc;
1130 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1133 /* Don't send NDPs when connected HE */
1134 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1137 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1141 skb_reserve(skb, local->hw.extra_tx_headroom);
1143 nullfunc = skb_put_zero(skb, 30);
1144 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1145 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1146 nullfunc->frame_control = fc;
1147 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1148 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1149 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1150 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1152 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1153 ieee80211_tx_skb(sdata, skb);
1156 /* spectrum management related things */
1157 static void ieee80211_chswitch_work(struct work_struct *work)
1159 struct ieee80211_sub_if_data *sdata =
1160 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1161 struct ieee80211_local *local = sdata->local;
1162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1165 if (!ieee80211_sdata_running(sdata))
1169 mutex_lock(&local->mtx);
1170 mutex_lock(&local->chanctx_mtx);
1172 if (!ifmgd->associated)
1175 if (!sdata->vif.csa_active)
1179 * using reservation isn't immediate as it may be deferred until later
1180 * with multi-vif. once reservation is complete it will re-schedule the
1181 * work with no reserved_chanctx so verify chandef to check if it
1182 * completed successfully
1185 if (sdata->reserved_chanctx) {
1186 struct ieee80211_supported_band *sband = NULL;
1187 struct sta_info *mgd_sta = NULL;
1188 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1191 * with multi-vif csa driver may call ieee80211_csa_finish()
1192 * many times while waiting for other interfaces to use their
1195 if (sdata->reserved_ready)
1198 if (sdata->vif.bss_conf.chandef.width !=
1199 sdata->csa_chandef.width) {
1201 * For managed interface, we need to also update the AP
1202 * station bandwidth and align the rate scale algorithm
1203 * on the bandwidth change. Here we only consider the
1204 * bandwidth of the new channel definition (as channel
1205 * switch flow does not have the full HT/VHT/HE
1206 * information), assuming that if additional changes are
1207 * required they would be done as part of the processing
1208 * of the next beacon from the AP.
1210 switch (sdata->csa_chandef.width) {
1211 case NL80211_CHAN_WIDTH_20_NOHT:
1212 case NL80211_CHAN_WIDTH_20:
1214 bw = IEEE80211_STA_RX_BW_20;
1216 case NL80211_CHAN_WIDTH_40:
1217 bw = IEEE80211_STA_RX_BW_40;
1219 case NL80211_CHAN_WIDTH_80:
1220 bw = IEEE80211_STA_RX_BW_80;
1222 case NL80211_CHAN_WIDTH_80P80:
1223 case NL80211_CHAN_WIDTH_160:
1224 bw = IEEE80211_STA_RX_BW_160;
1228 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1230 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1233 if (sdata->vif.bss_conf.chandef.width >
1234 sdata->csa_chandef.width) {
1235 mgd_sta->sta.bandwidth = bw;
1236 rate_control_rate_update(local, sband, mgd_sta,
1237 IEEE80211_RC_BW_CHANGED);
1240 ret = ieee80211_vif_use_reserved_context(sdata);
1243 "failed to use reserved channel context, disconnecting (err=%d)\n",
1245 ieee80211_queue_work(&sdata->local->hw,
1246 &ifmgd->csa_connection_drop_work);
1250 if (sdata->vif.bss_conf.chandef.width <
1251 sdata->csa_chandef.width) {
1252 mgd_sta->sta.bandwidth = bw;
1253 rate_control_rate_update(local, sband, mgd_sta,
1254 IEEE80211_RC_BW_CHANGED);
1260 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1261 &sdata->csa_chandef)) {
1263 "failed to finalize channel switch, disconnecting\n");
1264 ieee80211_queue_work(&sdata->local->hw,
1265 &ifmgd->csa_connection_drop_work);
1269 ifmgd->csa_waiting_bcn = true;
1271 ieee80211_sta_reset_beacon_monitor(sdata);
1272 ieee80211_sta_reset_conn_monitor(sdata);
1275 mutex_unlock(&local->chanctx_mtx);
1276 mutex_unlock(&local->mtx);
1277 sdata_unlock(sdata);
1280 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1282 struct ieee80211_local *local = sdata->local;
1283 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1286 sdata_assert_lock(sdata);
1288 WARN_ON(!sdata->vif.csa_active);
1290 if (sdata->csa_block_tx) {
1291 ieee80211_wake_vif_queues(local, sdata,
1292 IEEE80211_QUEUE_STOP_REASON_CSA);
1293 sdata->csa_block_tx = false;
1296 sdata->vif.csa_active = false;
1297 ifmgd->csa_waiting_bcn = false;
1299 * If the CSA IE is still present on the beacon after the switch,
1300 * we need to consider it as a new CSA (possibly to self).
1302 ifmgd->beacon_crc_valid = false;
1304 ret = drv_post_channel_switch(sdata);
1307 "driver post channel switch failed, disconnecting\n");
1308 ieee80211_queue_work(&local->hw,
1309 &ifmgd->csa_connection_drop_work);
1313 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1316 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1318 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1321 trace_api_chswitch_done(sdata, success);
1324 "driver channel switch failed, disconnecting\n");
1325 ieee80211_queue_work(&sdata->local->hw,
1326 &ifmgd->csa_connection_drop_work);
1328 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1331 EXPORT_SYMBOL(ieee80211_chswitch_done);
1333 static void ieee80211_chswitch_timer(struct timer_list *t)
1335 struct ieee80211_sub_if_data *sdata =
1336 from_timer(sdata, t, u.mgd.chswitch_timer);
1338 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1342 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1344 struct ieee80211_local *local = sdata->local;
1346 if (!local->ops->abort_channel_switch)
1349 mutex_lock(&local->mtx);
1351 mutex_lock(&local->chanctx_mtx);
1352 ieee80211_vif_unreserve_chanctx(sdata);
1353 mutex_unlock(&local->chanctx_mtx);
1355 if (sdata->csa_block_tx)
1356 ieee80211_wake_vif_queues(local, sdata,
1357 IEEE80211_QUEUE_STOP_REASON_CSA);
1359 sdata->csa_block_tx = false;
1360 sdata->vif.csa_active = false;
1362 mutex_unlock(&local->mtx);
1364 drv_abort_channel_switch(sdata);
1368 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1369 u64 timestamp, u32 device_timestamp,
1370 struct ieee802_11_elems *elems,
1373 struct ieee80211_local *local = sdata->local;
1374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1375 struct cfg80211_bss *cbss = ifmgd->associated;
1376 struct ieee80211_chanctx_conf *conf;
1377 struct ieee80211_chanctx *chanctx;
1378 enum nl80211_band current_band;
1379 struct ieee80211_csa_ie csa_ie;
1380 struct ieee80211_channel_switch ch_switch;
1381 struct ieee80211_bss *bss;
1384 sdata_assert_lock(sdata);
1389 if (local->scanning)
1392 current_band = cbss->channel->band;
1393 bss = (void *)cbss->priv;
1394 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1397 ifmgd->associated->bssid, &csa_ie);
1400 ch_switch.timestamp = timestamp;
1401 ch_switch.device_timestamp = device_timestamp;
1402 ch_switch.block_tx = csa_ie.mode;
1403 ch_switch.chandef = csa_ie.chandef;
1404 ch_switch.count = csa_ie.count;
1405 ch_switch.delay = csa_ie.max_switch_time;
1409 goto lock_and_drop_connection;
1411 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1413 ieee80211_sta_abort_chanswitch(sdata);
1415 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1417 } else if (sdata->vif.csa_active || res) {
1418 /* disregard subsequent announcements if already processing */
1422 if (sdata->vif.bss_conf.chandef.chan->band !=
1423 csa_ie.chandef.chan->band) {
1425 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1426 ifmgd->associated->bssid,
1427 csa_ie.chandef.chan->center_freq,
1428 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1429 csa_ie.chandef.center_freq2);
1430 goto lock_and_drop_connection;
1433 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1434 IEEE80211_CHAN_DISABLED)) {
1436 "AP %pM switches to unsupported channel "
1437 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1439 ifmgd->associated->bssid,
1440 csa_ie.chandef.chan->center_freq,
1441 csa_ie.chandef.chan->freq_offset,
1442 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1443 csa_ie.chandef.freq1_offset,
1444 csa_ie.chandef.center_freq2);
1445 goto lock_and_drop_connection;
1448 if (cfg80211_chandef_identical(&csa_ie.chandef,
1449 &sdata->vif.bss_conf.chandef) &&
1450 (!csa_ie.mode || !beacon)) {
1451 if (ifmgd->csa_ignored_same_chan)
1454 "AP %pM tries to chanswitch to same channel, ignore\n",
1455 ifmgd->associated->bssid);
1456 ifmgd->csa_ignored_same_chan = true;
1461 * Drop all TDLS peers - either we disconnect or move to a different
1462 * channel from this point on. There's no telling what our peer will do.
1463 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1464 * have an incompatible wider chandef.
1466 ieee80211_teardown_tdls_peers(sdata);
1468 mutex_lock(&local->mtx);
1469 mutex_lock(&local->chanctx_mtx);
1470 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1471 lockdep_is_held(&local->chanctx_mtx));
1474 "no channel context assigned to vif?, disconnecting\n");
1475 goto drop_connection;
1478 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1480 if (local->use_chanctx &&
1481 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1483 "driver doesn't support chan-switch with channel contexts\n");
1484 goto drop_connection;
1487 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1489 "preparing for channel switch failed, disconnecting\n");
1490 goto drop_connection;
1493 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1494 chanctx->mode, false);
1497 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1499 goto drop_connection;
1501 mutex_unlock(&local->chanctx_mtx);
1503 sdata->vif.csa_active = true;
1504 sdata->csa_chandef = csa_ie.chandef;
1505 sdata->csa_block_tx = csa_ie.mode;
1506 ifmgd->csa_ignored_same_chan = false;
1507 ifmgd->beacon_crc_valid = false;
1509 if (sdata->csa_block_tx)
1510 ieee80211_stop_vif_queues(local, sdata,
1511 IEEE80211_QUEUE_STOP_REASON_CSA);
1512 mutex_unlock(&local->mtx);
1514 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1515 csa_ie.count, csa_ie.mode);
1517 if (local->ops->channel_switch) {
1518 /* use driver's channel switch callback */
1519 drv_channel_switch(local, sdata, &ch_switch);
1523 /* channel switch handled in software */
1524 if (csa_ie.count <= 1)
1525 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1527 mod_timer(&ifmgd->chswitch_timer,
1528 TU_TO_EXP_TIME((csa_ie.count - 1) *
1529 cbss->beacon_interval));
1531 lock_and_drop_connection:
1532 mutex_lock(&local->mtx);
1533 mutex_lock(&local->chanctx_mtx);
1536 * This is just so that the disconnect flow will know that
1537 * we were trying to switch channel and failed. In case the
1538 * mode is 1 (we are not allowed to Tx), we will know not to
1539 * send a deauthentication frame. Those two fields will be
1540 * reset when the disconnection worker runs.
1542 sdata->vif.csa_active = true;
1543 sdata->csa_block_tx = csa_ie.mode;
1545 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1546 mutex_unlock(&local->chanctx_mtx);
1547 mutex_unlock(&local->mtx);
1551 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1552 struct ieee80211_channel *channel,
1553 const u8 *country_ie, u8 country_ie_len,
1554 const u8 *pwr_constr_elem,
1555 int *chan_pwr, int *pwr_reduction)
1557 struct ieee80211_country_ie_triplet *triplet;
1558 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1559 int i, chan_increment;
1560 bool have_chan_pwr = false;
1563 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1566 triplet = (void *)(country_ie + 3);
1567 country_ie_len -= 3;
1569 switch (channel->band) {
1573 case NL80211_BAND_2GHZ:
1574 case NL80211_BAND_60GHZ:
1577 case NL80211_BAND_5GHZ:
1580 case NL80211_BAND_6GHZ:
1582 * In the 6 GHz band, the "maximum transmit power level"
1583 * field in the triplets is reserved, and thus will be
1584 * zero and we shouldn't use it to control TX power.
1585 * The actual TX power will be given in the transmit
1586 * power envelope element instead.
1592 while (country_ie_len >= 3) {
1593 u8 first_channel = triplet->chans.first_channel;
1595 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1598 for (i = 0; i < triplet->chans.num_channels; i++) {
1599 if (first_channel + i * chan_increment == chan) {
1600 have_chan_pwr = true;
1601 *chan_pwr = triplet->chans.max_power;
1610 country_ie_len -= 3;
1613 if (have_chan_pwr && pwr_constr_elem)
1614 *pwr_reduction = *pwr_constr_elem;
1618 return have_chan_pwr;
1621 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1622 struct ieee80211_channel *channel,
1623 const u8 *cisco_dtpc_ie,
1626 /* From practical testing, the first data byte of the DTPC element
1627 * seems to contain the requested dBm level, and the CLI on Cisco
1628 * APs clearly state the range is -127 to 127 dBm, which indicates
1629 * a signed byte, although it seemingly never actually goes negative.
1630 * The other byte seems to always be zero.
1632 *pwr_level = (__s8)cisco_dtpc_ie[4];
1635 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1636 struct ieee80211_channel *channel,
1637 struct ieee80211_mgmt *mgmt,
1638 const u8 *country_ie, u8 country_ie_len,
1639 const u8 *pwr_constr_ie,
1640 const u8 *cisco_dtpc_ie)
1642 bool has_80211h_pwr = false, has_cisco_pwr = false;
1643 int chan_pwr = 0, pwr_reduction_80211h = 0;
1644 int pwr_level_cisco, pwr_level_80211h;
1646 __le16 capab = mgmt->u.probe_resp.capab_info;
1648 if (ieee80211_is_s1g_beacon(mgmt->frame_control))
1649 return 0; /* TODO */
1652 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1653 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1654 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1655 sdata, channel, country_ie, country_ie_len,
1656 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1658 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1661 if (cisco_dtpc_ie) {
1662 ieee80211_find_cisco_dtpc(
1663 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1664 has_cisco_pwr = true;
1667 if (!has_80211h_pwr && !has_cisco_pwr)
1670 /* If we have both 802.11h and Cisco DTPC, apply both limits
1671 * by picking the smallest of the two power levels advertised.
1673 if (has_80211h_pwr &&
1674 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1675 new_ap_level = pwr_level_80211h;
1677 if (sdata->ap_power_level == new_ap_level)
1681 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1682 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1683 sdata->u.mgd.bssid);
1684 } else { /* has_cisco_pwr is always true here. */
1685 new_ap_level = pwr_level_cisco;
1687 if (sdata->ap_power_level == new_ap_level)
1691 "Limiting TX power to %d dBm as advertised by %pM\n",
1692 pwr_level_cisco, sdata->u.mgd.bssid);
1695 sdata->ap_power_level = new_ap_level;
1696 if (__ieee80211_recalc_txpower(sdata))
1697 return BSS_CHANGED_TXPOWER;
1702 static void ieee80211_enable_ps(struct ieee80211_local *local,
1703 struct ieee80211_sub_if_data *sdata)
1705 struct ieee80211_conf *conf = &local->hw.conf;
1708 * If we are scanning right now then the parameters will
1709 * take effect when scan finishes.
1711 if (local->scanning)
1714 if (conf->dynamic_ps_timeout > 0 &&
1715 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1716 mod_timer(&local->dynamic_ps_timer, jiffies +
1717 msecs_to_jiffies(conf->dynamic_ps_timeout));
1719 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1720 ieee80211_send_nullfunc(local, sdata, true);
1722 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1723 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1726 conf->flags |= IEEE80211_CONF_PS;
1727 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1731 static void ieee80211_change_ps(struct ieee80211_local *local)
1733 struct ieee80211_conf *conf = &local->hw.conf;
1735 if (local->ps_sdata) {
1736 ieee80211_enable_ps(local, local->ps_sdata);
1737 } else if (conf->flags & IEEE80211_CONF_PS) {
1738 conf->flags &= ~IEEE80211_CONF_PS;
1739 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1740 del_timer_sync(&local->dynamic_ps_timer);
1741 cancel_work_sync(&local->dynamic_ps_enable_work);
1745 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1747 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1748 struct sta_info *sta = NULL;
1749 bool authorized = false;
1751 if (!mgd->powersave)
1757 if (!mgd->associated)
1760 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1763 if (!mgd->have_beacon)
1767 sta = sta_info_get(sdata, mgd->bssid);
1769 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1775 /* need to hold RTNL or interface lock */
1776 void ieee80211_recalc_ps(struct ieee80211_local *local)
1778 struct ieee80211_sub_if_data *sdata, *found = NULL;
1782 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1783 local->ps_sdata = NULL;
1787 list_for_each_entry(sdata, &local->interfaces, list) {
1788 if (!ieee80211_sdata_running(sdata))
1790 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1791 /* If an AP vif is found, then disable PS
1792 * by setting the count to zero thereby setting
1798 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1804 if (count == 1 && ieee80211_powersave_allowed(found)) {
1805 u8 dtimper = found->u.mgd.dtim_period;
1807 timeout = local->dynamic_ps_forced_timeout;
1810 local->hw.conf.dynamic_ps_timeout = timeout;
1812 /* If the TIM IE is invalid, pretend the value is 1 */
1816 local->hw.conf.ps_dtim_period = dtimper;
1817 local->ps_sdata = found;
1819 local->ps_sdata = NULL;
1822 ieee80211_change_ps(local);
1825 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1827 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1829 if (sdata->vif.bss_conf.ps != ps_allowed) {
1830 sdata->vif.bss_conf.ps = ps_allowed;
1831 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1835 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1837 struct ieee80211_local *local =
1838 container_of(work, struct ieee80211_local,
1839 dynamic_ps_disable_work);
1841 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1842 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1843 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1846 ieee80211_wake_queues_by_reason(&local->hw,
1847 IEEE80211_MAX_QUEUE_MAP,
1848 IEEE80211_QUEUE_STOP_REASON_PS,
1852 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1854 struct ieee80211_local *local =
1855 container_of(work, struct ieee80211_local,
1856 dynamic_ps_enable_work);
1857 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1858 struct ieee80211_if_managed *ifmgd;
1859 unsigned long flags;
1862 /* can only happen when PS was just disabled anyway */
1866 ifmgd = &sdata->u.mgd;
1868 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1871 if (local->hw.conf.dynamic_ps_timeout > 0) {
1872 /* don't enter PS if TX frames are pending */
1873 if (drv_tx_frames_pending(local)) {
1874 mod_timer(&local->dynamic_ps_timer, jiffies +
1876 local->hw.conf.dynamic_ps_timeout));
1881 * transmission can be stopped by others which leads to
1882 * dynamic_ps_timer expiry. Postpone the ps timer if it
1883 * is not the actual idle state.
1885 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1886 for (q = 0; q < local->hw.queues; q++) {
1887 if (local->queue_stop_reasons[q]) {
1888 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1890 mod_timer(&local->dynamic_ps_timer, jiffies +
1892 local->hw.conf.dynamic_ps_timeout));
1896 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1899 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1900 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1901 if (drv_tx_frames_pending(local)) {
1902 mod_timer(&local->dynamic_ps_timer, jiffies +
1904 local->hw.conf.dynamic_ps_timeout));
1906 ieee80211_send_nullfunc(local, sdata, true);
1907 /* Flush to get the tx status of nullfunc frame */
1908 ieee80211_flush_queues(local, sdata, false);
1912 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1913 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1914 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1915 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1916 local->hw.conf.flags |= IEEE80211_CONF_PS;
1917 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1921 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1923 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1925 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1928 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1930 struct delayed_work *delayed_work = to_delayed_work(work);
1931 struct ieee80211_sub_if_data *sdata =
1932 container_of(delayed_work, struct ieee80211_sub_if_data,
1933 dfs_cac_timer_work);
1934 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1936 mutex_lock(&sdata->local->mtx);
1937 if (sdata->wdev.cac_started) {
1938 ieee80211_vif_release_channel(sdata);
1939 cfg80211_cac_event(sdata->dev, &chandef,
1940 NL80211_RADAR_CAC_FINISHED,
1943 mutex_unlock(&sdata->local->mtx);
1947 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1949 struct ieee80211_local *local = sdata->local;
1950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1954 if (local->hw.queues < IEEE80211_NUM_ACS)
1957 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1958 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1960 unsigned long now = jiffies;
1962 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1963 tx_tspec->admitted_time &&
1964 time_after(now, tx_tspec->time_slice_start + HZ)) {
1965 tx_tspec->consumed_tx_time = 0;
1966 tx_tspec->time_slice_start = now;
1968 if (tx_tspec->downgraded)
1970 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1973 switch (tx_tspec->action) {
1974 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1975 /* take the original parameters */
1976 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1978 "failed to set TX queue parameters for queue %d\n",
1980 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1981 tx_tspec->downgraded = false;
1984 case TX_TSPEC_ACTION_DOWNGRADE:
1985 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1986 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1990 /* downgrade next lower non-ACM AC */
1991 for (non_acm_ac = ac + 1;
1992 non_acm_ac < IEEE80211_NUM_ACS;
1994 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1996 /* Usually the loop will result in using BK even if it
1997 * requires admission control, but such a configuration
1998 * makes no sense and we have to transmit somehow - the
1999 * AC selection does the same thing.
2000 * If we started out trying to downgrade from BK, then
2001 * the extra condition here might be needed.
2003 if (non_acm_ac >= IEEE80211_NUM_ACS)
2004 non_acm_ac = IEEE80211_AC_BK;
2005 if (drv_conf_tx(local, sdata, ac,
2006 &sdata->tx_conf[non_acm_ac]))
2008 "failed to set TX queue parameters for queue %d\n",
2010 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2012 schedule_delayed_work(&ifmgd->tx_tspec_wk,
2013 tx_tspec->time_slice_start + HZ - now + 1);
2015 case TX_TSPEC_ACTION_NONE:
2024 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2026 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
2027 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
2030 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
2032 struct ieee80211_sub_if_data *sdata;
2034 sdata = container_of(work, struct ieee80211_sub_if_data,
2035 u.mgd.tx_tspec_wk.work);
2036 ieee80211_sta_handle_tspec_ac_params(sdata);
2041 ieee80211_sta_wmm_params(struct ieee80211_local *local,
2042 struct ieee80211_sub_if_data *sdata,
2043 const u8 *wmm_param, size_t wmm_param_len,
2044 const struct ieee80211_mu_edca_param_set *mu_edca)
2046 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
2047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2049 int count, mu_edca_count, ac;
2051 u8 uapsd_queues = 0;
2053 if (!local->ops->conf_tx)
2056 if (local->hw.queues < IEEE80211_NUM_ACS)
2062 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2065 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2066 uapsd_queues = ifmgd->uapsd_queues;
2068 count = wmm_param[6] & 0x0f;
2069 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2070 * if mu_edca was preset before and now it disappeared tell
2071 * the driver about it.
2073 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2074 if (count == ifmgd->wmm_last_param_set &&
2075 mu_edca_count == ifmgd->mu_edca_last_param_set)
2077 ifmgd->wmm_last_param_set = count;
2078 ifmgd->mu_edca_last_param_set = mu_edca_count;
2080 pos = wmm_param + 8;
2081 left = wmm_param_len - 8;
2083 memset(¶ms, 0, sizeof(params));
2086 for (; left >= 4; left -= 4, pos += 4) {
2087 int aci = (pos[0] >> 5) & 0x03;
2088 int acm = (pos[0] >> 4) & 0x01;
2093 ac = IEEE80211_AC_BK;
2095 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2096 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2098 params[ac].mu_edca = !!mu_edca;
2100 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2103 ac = IEEE80211_AC_VI;
2105 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2106 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2108 params[ac].mu_edca = !!mu_edca;
2110 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2113 ac = IEEE80211_AC_VO;
2115 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2116 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2118 params[ac].mu_edca = !!mu_edca;
2120 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2124 ac = IEEE80211_AC_BE;
2126 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2127 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2129 params[ac].mu_edca = !!mu_edca;
2131 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2135 params[ac].aifs = pos[0] & 0x0f;
2137 if (params[ac].aifs < 2) {
2139 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2140 params[ac].aifs, aci);
2141 params[ac].aifs = 2;
2143 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2144 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2145 params[ac].txop = get_unaligned_le16(pos + 2);
2146 params[ac].acm = acm;
2147 params[ac].uapsd = uapsd;
2149 if (params[ac].cw_min == 0 ||
2150 params[ac].cw_min > params[ac].cw_max) {
2152 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2153 params[ac].cw_min, params[ac].cw_max, aci);
2156 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac);
2159 /* WMM specification requires all 4 ACIs. */
2160 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2161 if (params[ac].cw_min == 0) {
2163 "AP has invalid WMM params (missing AC %d), using defaults\n",
2169 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2171 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2173 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2174 params[ac].txop, params[ac].uapsd,
2175 ifmgd->tx_tspec[ac].downgraded);
2176 sdata->tx_conf[ac] = params[ac];
2177 if (!ifmgd->tx_tspec[ac].downgraded &&
2178 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
2180 "failed to set TX queue parameters for AC %d\n",
2184 /* enable WMM or activate new settings */
2185 sdata->vif.bss_conf.qos = true;
2189 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2191 lockdep_assert_held(&sdata->local->mtx);
2193 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2194 ieee80211_run_deferred_scan(sdata->local);
2197 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2199 mutex_lock(&sdata->local->mtx);
2200 __ieee80211_stop_poll(sdata);
2201 mutex_unlock(&sdata->local->mtx);
2204 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2205 u16 capab, bool erp_valid, u8 erp)
2207 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2208 struct ieee80211_supported_band *sband;
2210 bool use_protection;
2211 bool use_short_preamble;
2212 bool use_short_slot;
2214 sband = ieee80211_get_sband(sdata);
2219 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2220 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2222 use_protection = false;
2223 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2226 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2227 if (sband->band == NL80211_BAND_5GHZ ||
2228 sband->band == NL80211_BAND_6GHZ)
2229 use_short_slot = true;
2231 if (use_protection != bss_conf->use_cts_prot) {
2232 bss_conf->use_cts_prot = use_protection;
2233 changed |= BSS_CHANGED_ERP_CTS_PROT;
2236 if (use_short_preamble != bss_conf->use_short_preamble) {
2237 bss_conf->use_short_preamble = use_short_preamble;
2238 changed |= BSS_CHANGED_ERP_PREAMBLE;
2241 if (use_short_slot != bss_conf->use_short_slot) {
2242 bss_conf->use_short_slot = use_short_slot;
2243 changed |= BSS_CHANGED_ERP_SLOT;
2249 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2250 struct cfg80211_bss *cbss,
2251 u32 bss_info_changed)
2253 struct ieee80211_bss *bss = (void *)cbss->priv;
2254 struct ieee80211_local *local = sdata->local;
2255 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2257 bss_info_changed |= BSS_CHANGED_ASSOC;
2258 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2259 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2261 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2262 beacon_loss_count * bss_conf->beacon_int));
2264 sdata->u.mgd.associated = cbss;
2265 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2267 ieee80211_check_rate_mask(sdata);
2269 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2271 if (sdata->vif.p2p ||
2272 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2273 const struct cfg80211_bss_ies *ies;
2276 ies = rcu_dereference(cbss->ies);
2280 ret = cfg80211_get_p2p_attr(
2281 ies->data, ies->len,
2282 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2283 (u8 *) &bss_conf->p2p_noa_attr,
2284 sizeof(bss_conf->p2p_noa_attr));
2286 sdata->u.mgd.p2p_noa_index =
2287 bss_conf->p2p_noa_attr.index;
2288 bss_info_changed |= BSS_CHANGED_P2P_PS;
2294 /* just to be sure */
2295 ieee80211_stop_poll(sdata);
2297 ieee80211_led_assoc(local, 1);
2299 if (sdata->u.mgd.have_beacon) {
2301 * If the AP is buggy we may get here with no DTIM period
2302 * known, so assume it's 1 which is the only safe assumption
2303 * in that case, although if the TIM IE is broken powersave
2304 * probably just won't work at all.
2306 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2307 bss_conf->beacon_rate = bss->beacon_rate;
2308 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2310 bss_conf->beacon_rate = NULL;
2311 bss_conf->dtim_period = 0;
2314 bss_conf->assoc = 1;
2316 /* Tell the driver to monitor connection quality (if supported) */
2317 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2318 bss_conf->cqm_rssi_thold)
2319 bss_info_changed |= BSS_CHANGED_CQM;
2321 /* Enable ARP filtering */
2322 if (bss_conf->arp_addr_cnt)
2323 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2325 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2327 mutex_lock(&local->iflist_mtx);
2328 ieee80211_recalc_ps(local);
2329 mutex_unlock(&local->iflist_mtx);
2331 ieee80211_recalc_smps(sdata);
2332 ieee80211_recalc_ps_vif(sdata);
2334 netif_carrier_on(sdata->dev);
2337 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2338 u16 stype, u16 reason, bool tx,
2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2342 struct ieee80211_local *local = sdata->local;
2345 sdata_assert_lock(sdata);
2347 if (WARN_ON_ONCE(tx && !frame_buf))
2350 if (WARN_ON(!ifmgd->associated))
2353 ieee80211_stop_poll(sdata);
2355 ifmgd->associated = NULL;
2356 netif_carrier_off(sdata->dev);
2359 * if we want to get out of ps before disassoc (why?) we have
2360 * to do it before sending disassoc, as otherwise the null-packet
2363 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2364 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2365 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2367 local->ps_sdata = NULL;
2369 /* disable per-vif ps */
2370 ieee80211_recalc_ps_vif(sdata);
2372 /* make sure ongoing transmission finishes */
2376 * drop any frame before deauth/disassoc, this can be data or
2377 * management frame. Since we are disconnecting, we should not
2378 * insist sending these frames which can take time and delay
2379 * the disconnection and possible the roaming.
2382 ieee80211_flush_queues(local, sdata, true);
2384 /* deauthenticate/disassociate now */
2385 if (tx || frame_buf) {
2387 * In multi channel scenarios guarantee that the virtual
2388 * interface is granted immediate airtime to transmit the
2389 * deauthentication frame by calling mgd_prepare_tx, if the
2390 * driver requested so.
2392 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2393 !ifmgd->have_beacon)
2394 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2396 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
2397 ifmgd->bssid, stype, reason,
2401 /* flush out frame - make sure the deauth was actually sent */
2403 ieee80211_flush_queues(local, sdata, false);
2405 /* clear bssid only after building the needed mgmt frames */
2406 eth_zero_addr(ifmgd->bssid);
2408 sdata->vif.bss_conf.ssid_len = 0;
2410 /* remove AP and TDLS peers */
2411 sta_info_flush(sdata);
2413 /* finally reset all BSS / config parameters */
2414 changed |= ieee80211_reset_erp_info(sdata);
2416 ieee80211_led_assoc(local, 0);
2417 changed |= BSS_CHANGED_ASSOC;
2418 sdata->vif.bss_conf.assoc = false;
2420 ifmgd->p2p_noa_index = -1;
2421 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2422 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2424 /* on the next assoc, re-program HT/VHT parameters */
2425 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2426 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2427 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2428 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2430 /* reset MU-MIMO ownership and group data */
2431 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2432 sizeof(sdata->vif.bss_conf.mu_group.membership));
2433 memset(sdata->vif.bss_conf.mu_group.position, 0,
2434 sizeof(sdata->vif.bss_conf.mu_group.position));
2435 changed |= BSS_CHANGED_MU_GROUPS;
2436 sdata->vif.mu_mimo_owner = false;
2438 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2440 del_timer_sync(&local->dynamic_ps_timer);
2441 cancel_work_sync(&local->dynamic_ps_enable_work);
2443 /* Disable ARP filtering */
2444 if (sdata->vif.bss_conf.arp_addr_cnt)
2445 changed |= BSS_CHANGED_ARP_FILTER;
2447 sdata->vif.bss_conf.qos = false;
2448 changed |= BSS_CHANGED_QOS;
2450 /* The BSSID (not really interesting) and HT changed */
2451 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2452 ieee80211_bss_info_change_notify(sdata, changed);
2454 /* disassociated - set to defaults now */
2455 ieee80211_set_wmm_default(sdata, false, false);
2457 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2458 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2459 del_timer_sync(&sdata->u.mgd.timer);
2460 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2462 sdata->vif.bss_conf.dtim_period = 0;
2463 sdata->vif.bss_conf.beacon_rate = NULL;
2465 ifmgd->have_beacon = false;
2468 mutex_lock(&local->mtx);
2469 ieee80211_vif_release_channel(sdata);
2471 sdata->vif.csa_active = false;
2472 ifmgd->csa_waiting_bcn = false;
2473 ifmgd->csa_ignored_same_chan = false;
2474 if (sdata->csa_block_tx) {
2475 ieee80211_wake_vif_queues(local, sdata,
2476 IEEE80211_QUEUE_STOP_REASON_CSA);
2477 sdata->csa_block_tx = false;
2479 mutex_unlock(&local->mtx);
2481 /* existing TX TSPEC sessions no longer exist */
2482 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2483 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2485 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2488 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2490 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2491 struct ieee80211_local *local = sdata->local;
2493 mutex_lock(&local->mtx);
2494 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2497 __ieee80211_stop_poll(sdata);
2499 mutex_lock(&local->iflist_mtx);
2500 ieee80211_recalc_ps(local);
2501 mutex_unlock(&local->iflist_mtx);
2503 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2507 * We've received a probe response, but are not sure whether
2508 * we have or will be receiving any beacons or data, so let's
2509 * schedule the timers again, just in case.
2511 ieee80211_sta_reset_beacon_monitor(sdata);
2513 mod_timer(&ifmgd->conn_mon_timer,
2514 round_jiffies_up(jiffies +
2515 IEEE80211_CONNECTION_IDLE_TIME));
2517 mutex_unlock(&local->mtx);
2520 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2521 struct ieee80211_hdr *hdr,
2524 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2525 u16 tid = ieee80211_get_tid(hdr);
2526 int ac = ieee80211_ac_from_tid(tid);
2527 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2528 unsigned long now = jiffies;
2530 if (likely(!tx_tspec->admitted_time))
2533 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2534 tx_tspec->consumed_tx_time = 0;
2535 tx_tspec->time_slice_start = now;
2537 if (tx_tspec->downgraded) {
2538 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2539 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2543 if (tx_tspec->downgraded)
2546 tx_tspec->consumed_tx_time += tx_time;
2548 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2549 tx_tspec->downgraded = true;
2550 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2551 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2555 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2556 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2558 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2560 if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
2561 !sdata->u.mgd.probe_send_count)
2565 sdata->u.mgd.probe_send_count = 0;
2567 sdata->u.mgd.nullfunc_failed = true;
2568 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2571 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2572 const u8 *src, const u8 *dst,
2573 const u8 *ssid, size_t ssid_len,
2574 struct ieee80211_channel *channel)
2576 struct sk_buff *skb;
2578 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2579 ssid, ssid_len, NULL, 0,
2580 IEEE80211_PROBE_FLAG_DIRECTED);
2582 ieee80211_tx_skb(sdata, skb);
2585 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2589 u8 *dst = ifmgd->associated->bssid;
2590 u8 unicast_limit = max(1, max_probe_tries - 3);
2591 struct sta_info *sta;
2594 * Try sending broadcast probe requests for the last three
2595 * probe requests after the first ones failed since some
2596 * buggy APs only support broadcast probe requests.
2598 if (ifmgd->probe_send_count >= unicast_limit)
2602 * When the hardware reports an accurate Tx ACK status, it's
2603 * better to send a nullfunc frame instead of a probe request,
2604 * as it will kick us off the AP quickly if we aren't associated
2605 * anymore. The timeout will be reset if the frame is ACKed by
2608 ifmgd->probe_send_count++;
2611 mutex_lock(&sdata->local->sta_mtx);
2612 sta = sta_info_get(sdata, dst);
2614 ieee80211_check_fast_rx(sta);
2615 mutex_unlock(&sdata->local->sta_mtx);
2618 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2619 ifmgd->nullfunc_failed = false;
2620 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
2621 ifmgd->probe_send_count--;
2623 ieee80211_send_nullfunc(sdata->local, sdata, false);
2628 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2629 if (WARN_ON_ONCE(ssid == NULL))
2634 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2636 ifmgd->associated->channel);
2640 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2641 run_again(sdata, ifmgd->probe_timeout);
2644 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2647 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2648 bool already = false;
2650 if (!ieee80211_sdata_running(sdata))
2655 if (!ifmgd->associated)
2658 mutex_lock(&sdata->local->mtx);
2660 if (sdata->local->tmp_channel || sdata->local->scanning) {
2661 mutex_unlock(&sdata->local->mtx);
2666 mlme_dbg_ratelimited(sdata,
2667 "detected beacon loss from AP (missed %d beacons) - probing\n",
2670 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2674 * The driver/our work has already reported this event or the
2675 * connection monitoring has kicked in and we have already sent
2676 * a probe request. Or maybe the AP died and the driver keeps
2677 * reporting until we disassociate...
2679 * In either case we have to ignore the current call to this
2680 * function (except for setting the correct probe reason bit)
2681 * because otherwise we would reset the timer every time and
2682 * never check whether we received a probe response!
2684 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2687 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2689 mutex_unlock(&sdata->local->mtx);
2694 mutex_lock(&sdata->local->iflist_mtx);
2695 ieee80211_recalc_ps(sdata->local);
2696 mutex_unlock(&sdata->local->iflist_mtx);
2698 ifmgd->probe_send_count = 0;
2699 ieee80211_mgd_probe_ap_send(sdata);
2701 sdata_unlock(sdata);
2704 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2705 struct ieee80211_vif *vif)
2707 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2708 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2709 struct cfg80211_bss *cbss;
2710 struct sk_buff *skb;
2714 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2717 sdata_assert_lock(sdata);
2719 if (ifmgd->associated)
2720 cbss = ifmgd->associated;
2721 else if (ifmgd->auth_data)
2722 cbss = ifmgd->auth_data->bss;
2723 else if (ifmgd->assoc_data)
2724 cbss = ifmgd->assoc_data->bss;
2729 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2730 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
2731 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2736 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2737 (u32) -1, cbss->channel,
2739 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2744 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2746 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2747 const u8 *buf, size_t len, bool tx,
2748 u16 reason, bool reconnect)
2750 struct ieee80211_event event = {
2752 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2753 .u.mlme.reason = reason,
2757 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
2759 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2761 drv_event_callback(sdata->local, sdata, &event);
2764 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2766 struct ieee80211_local *local = sdata->local;
2767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2768 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2772 if (!ifmgd->associated) {
2773 sdata_unlock(sdata);
2777 tx = !sdata->csa_block_tx;
2779 if (!ifmgd->driver_disconnect) {
2781 * AP is probably out of range (or not reachable for another
2782 * reason) so remove the bss struct for that AP.
2784 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2787 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2788 ifmgd->driver_disconnect ?
2789 WLAN_REASON_DEAUTH_LEAVING :
2790 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2792 mutex_lock(&local->mtx);
2793 sdata->vif.csa_active = false;
2794 ifmgd->csa_waiting_bcn = false;
2795 if (sdata->csa_block_tx) {
2796 ieee80211_wake_vif_queues(local, sdata,
2797 IEEE80211_QUEUE_STOP_REASON_CSA);
2798 sdata->csa_block_tx = false;
2800 mutex_unlock(&local->mtx);
2802 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2803 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2805 ifmgd->reconnect = false;
2807 sdata_unlock(sdata);
2810 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2812 struct ieee80211_sub_if_data *sdata =
2813 container_of(work, struct ieee80211_sub_if_data,
2814 u.mgd.beacon_connection_loss_work);
2815 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2817 if (ifmgd->associated)
2818 ifmgd->beacon_loss_count++;
2820 if (ifmgd->connection_loss) {
2821 sdata_info(sdata, "Connection to AP %pM lost\n",
2823 __ieee80211_disconnect(sdata);
2824 ifmgd->connection_loss = false;
2825 } else if (ifmgd->driver_disconnect) {
2827 "Driver requested disconnection from AP %pM\n",
2829 __ieee80211_disconnect(sdata);
2830 ifmgd->driver_disconnect = false;
2832 ieee80211_mgd_probe_ap(sdata, true);
2836 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2838 struct ieee80211_sub_if_data *sdata =
2839 container_of(work, struct ieee80211_sub_if_data,
2840 u.mgd.csa_connection_drop_work);
2842 __ieee80211_disconnect(sdata);
2845 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2847 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2848 struct ieee80211_hw *hw = &sdata->local->hw;
2850 trace_api_beacon_loss(sdata);
2852 sdata->u.mgd.connection_loss = false;
2853 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2855 EXPORT_SYMBOL(ieee80211_beacon_loss);
2857 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2859 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2860 struct ieee80211_hw *hw = &sdata->local->hw;
2862 trace_api_connection_loss(sdata);
2864 sdata->u.mgd.connection_loss = true;
2865 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2867 EXPORT_SYMBOL(ieee80211_connection_loss);
2869 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
2871 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2872 struct ieee80211_hw *hw = &sdata->local->hw;
2874 trace_api_disconnect(sdata, reconnect);
2876 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2879 sdata->u.mgd.driver_disconnect = true;
2880 sdata->u.mgd.reconnect = reconnect;
2881 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2883 EXPORT_SYMBOL(ieee80211_disconnect);
2885 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2888 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2890 sdata_assert_lock(sdata);
2894 * we are not authenticated yet, the only timer that could be
2895 * running is the timeout for the authentication response which
2896 * which is not relevant anymore.
2898 del_timer_sync(&sdata->u.mgd.timer);
2899 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2901 eth_zero_addr(sdata->u.mgd.bssid);
2902 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2903 sdata->u.mgd.flags = 0;
2904 mutex_lock(&sdata->local->mtx);
2905 ieee80211_vif_release_channel(sdata);
2906 mutex_unlock(&sdata->local->mtx);
2909 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2911 sdata->u.mgd.auth_data = NULL;
2914 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2915 bool assoc, bool abandon)
2917 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2919 sdata_assert_lock(sdata);
2923 * we are not associated yet, the only timer that could be
2924 * running is the timeout for the association response which
2925 * which is not relevant anymore.
2927 del_timer_sync(&sdata->u.mgd.timer);
2928 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2930 eth_zero_addr(sdata->u.mgd.bssid);
2931 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2932 sdata->u.mgd.flags = 0;
2933 sdata->vif.mu_mimo_owner = false;
2935 mutex_lock(&sdata->local->mtx);
2936 ieee80211_vif_release_channel(sdata);
2937 mutex_unlock(&sdata->local->mtx);
2940 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2944 sdata->u.mgd.assoc_data = NULL;
2947 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2948 struct ieee80211_mgmt *mgmt, size_t len)
2950 struct ieee80211_local *local = sdata->local;
2951 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2953 struct ieee802_11_elems elems;
2956 pos = mgmt->u.auth.variable;
2957 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2958 mgmt->bssid, auth_data->bss->bssid);
2959 if (!elems.challenge)
2961 auth_data->expected_transaction = 4;
2962 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2963 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2964 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2965 IEEE80211_TX_INTFL_MLME_CONN_TX;
2966 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2967 elems.challenge - 2, elems.challenge_len + 2,
2968 auth_data->bss->bssid, auth_data->bss->bssid,
2969 auth_data->key, auth_data->key_len,
2970 auth_data->key_idx, tx_flags);
2973 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2977 struct sta_info *sta;
2980 sdata_info(sdata, "authenticated\n");
2981 ifmgd->auth_data->done = true;
2982 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2983 ifmgd->auth_data->timeout_started = true;
2984 run_again(sdata, ifmgd->auth_data->timeout);
2986 /* move station state to auth */
2987 mutex_lock(&sdata->local->sta_mtx);
2988 sta = sta_info_get(sdata, bssid);
2990 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2994 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2995 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
3001 mutex_unlock(&sdata->local->sta_mtx);
3005 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
3006 struct ieee80211_mgmt *mgmt, size_t len)
3008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3010 u16 auth_alg, auth_transaction, status_code;
3011 struct ieee80211_event event = {
3013 .u.mlme.data = AUTH_EVENT,
3016 sdata_assert_lock(sdata);
3021 if (!ifmgd->auth_data || ifmgd->auth_data->done)
3024 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3026 if (!ether_addr_equal(bssid, mgmt->bssid))
3029 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
3030 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
3031 status_code = le16_to_cpu(mgmt->u.auth.status_code);
3033 if (auth_alg != ifmgd->auth_data->algorithm ||
3034 (auth_alg != WLAN_AUTH_SAE &&
3035 auth_transaction != ifmgd->auth_data->expected_transaction) ||
3036 (auth_alg == WLAN_AUTH_SAE &&
3037 (auth_transaction < ifmgd->auth_data->expected_transaction ||
3038 auth_transaction > 2))) {
3039 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
3040 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
3042 ifmgd->auth_data->expected_transaction);
3046 if (status_code != WLAN_STATUS_SUCCESS) {
3047 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3049 if (auth_alg == WLAN_AUTH_SAE &&
3050 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
3051 (auth_transaction == 1 &&
3052 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
3053 status_code == WLAN_STATUS_SAE_PK))))
3056 sdata_info(sdata, "%pM denied authentication (status %d)\n",
3057 mgmt->sa, status_code);
3058 ieee80211_destroy_auth_data(sdata, false);
3059 event.u.mlme.status = MLME_DENIED;
3060 event.u.mlme.reason = status_code;
3061 drv_event_callback(sdata->local, sdata, &event);
3065 switch (ifmgd->auth_data->algorithm) {
3066 case WLAN_AUTH_OPEN:
3067 case WLAN_AUTH_LEAP:
3070 case WLAN_AUTH_FILS_SK:
3071 case WLAN_AUTH_FILS_SK_PFS:
3072 case WLAN_AUTH_FILS_PK:
3074 case WLAN_AUTH_SHARED_KEY:
3075 if (ifmgd->auth_data->expected_transaction != 4) {
3076 ieee80211_auth_challenge(sdata, mgmt, len);
3077 /* need another frame */
3082 WARN_ONCE(1, "invalid auth alg %d",
3083 ifmgd->auth_data->algorithm);
3087 event.u.mlme.status = MLME_SUCCESS;
3088 drv_event_callback(sdata->local, sdata, &event);
3089 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3090 (auth_transaction == 2 &&
3091 ifmgd->auth_data->expected_transaction == 2)) {
3092 if (!ieee80211_mark_sta_auth(sdata, bssid))
3093 return; /* ignore frame -- wait for timeout */
3094 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3095 auth_transaction == 2) {
3096 sdata_info(sdata, "SAE peer confirmed\n");
3097 ifmgd->auth_data->peer_confirmed = true;
3100 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3103 #define case_WLAN(type) \
3104 case WLAN_REASON_##type: return #type
3106 const char *ieee80211_get_reason_code_string(u16 reason_code)
3108 switch (reason_code) {
3109 case_WLAN(UNSPECIFIED);
3110 case_WLAN(PREV_AUTH_NOT_VALID);
3111 case_WLAN(DEAUTH_LEAVING);
3112 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3113 case_WLAN(DISASSOC_AP_BUSY);
3114 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3115 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3116 case_WLAN(DISASSOC_STA_HAS_LEFT);
3117 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3118 case_WLAN(DISASSOC_BAD_POWER);
3119 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3120 case_WLAN(INVALID_IE);
3121 case_WLAN(MIC_FAILURE);
3122 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3123 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3124 case_WLAN(IE_DIFFERENT);
3125 case_WLAN(INVALID_GROUP_CIPHER);
3126 case_WLAN(INVALID_PAIRWISE_CIPHER);
3127 case_WLAN(INVALID_AKMP);
3128 case_WLAN(UNSUPP_RSN_VERSION);
3129 case_WLAN(INVALID_RSN_IE_CAP);
3130 case_WLAN(IEEE8021X_FAILED);
3131 case_WLAN(CIPHER_SUITE_REJECTED);
3132 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3133 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3134 case_WLAN(DISASSOC_LOW_ACK);
3135 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3136 case_WLAN(QSTA_LEAVE_QBSS);
3137 case_WLAN(QSTA_NOT_USE);
3138 case_WLAN(QSTA_REQUIRE_SETUP);
3139 case_WLAN(QSTA_TIMEOUT);
3140 case_WLAN(QSTA_CIPHER_NOT_SUPP);
3141 case_WLAN(MESH_PEER_CANCELED);
3142 case_WLAN(MESH_MAX_PEERS);
3143 case_WLAN(MESH_CONFIG);
3144 case_WLAN(MESH_CLOSE);
3145 case_WLAN(MESH_MAX_RETRIES);
3146 case_WLAN(MESH_CONFIRM_TIMEOUT);
3147 case_WLAN(MESH_INVALID_GTK);
3148 case_WLAN(MESH_INCONSISTENT_PARAM);
3149 case_WLAN(MESH_INVALID_SECURITY);
3150 case_WLAN(MESH_PATH_ERROR);
3151 case_WLAN(MESH_PATH_NOFORWARD);
3152 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3153 case_WLAN(MAC_EXISTS_IN_MBSS);
3154 case_WLAN(MESH_CHAN_REGULATORY);
3155 case_WLAN(MESH_CHAN);
3156 default: return "<unknown>";
3160 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3161 struct ieee80211_mgmt *mgmt, size_t len)
3163 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3164 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3166 sdata_assert_lock(sdata);
3171 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3172 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3176 if (ifmgd->associated &&
3177 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3178 const u8 *bssid = ifmgd->associated->bssid;
3180 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3182 ieee80211_get_reason_code_string(reason_code));
3184 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3186 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3187 reason_code, false);
3191 if (ifmgd->assoc_data &&
3192 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3193 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3196 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3198 ieee80211_get_reason_code_string(reason_code));
3200 ieee80211_destroy_assoc_data(sdata, false, true);
3202 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3208 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3209 struct ieee80211_mgmt *mgmt, size_t len)
3211 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3214 sdata_assert_lock(sdata);
3219 if (!ifmgd->associated ||
3220 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3223 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3225 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3226 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3230 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3231 mgmt->sa, reason_code,
3232 ieee80211_get_reason_code_string(reason_code));
3234 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3236 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
3240 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3241 u8 *supp_rates, unsigned int supp_rates_len,
3242 u32 *rates, u32 *basic_rates,
3243 bool *have_higher_than_11mbit,
3244 int *min_rate, int *min_rate_index,
3249 for (i = 0; i < supp_rates_len; i++) {
3250 int rate = supp_rates[i] & 0x7f;
3251 bool is_basic = !!(supp_rates[i] & 0x80);
3253 if ((rate * 5 * (1 << shift)) > 110)
3254 *have_higher_than_11mbit = true;
3257 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors
3258 * since they're not rates.
3260 * Note: Even though the membership selector and the basic
3261 * rate flag share the same bit, they are not exactly
3264 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3265 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3266 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
3267 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
3270 for (j = 0; j < sband->n_bitrates; j++) {
3271 struct ieee80211_rate *br;
3274 br = &sband->bitrates[j];
3276 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3277 if (brate == rate) {
3280 *basic_rates |= BIT(j);
3281 if ((rate * 5) < *min_rate) {
3282 *min_rate = rate * 5;
3283 *min_rate_index = j;
3291 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3292 const struct ieee802_11_elems *elems)
3294 if (elems->ext_capab_len < 10)
3297 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3300 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3301 IEEE80211_HE_MAC_CAP0_TWT_RES;
3304 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3305 struct sta_info *sta,
3306 struct ieee802_11_elems *elems)
3308 bool twt = ieee80211_twt_req_supported(sta, elems);
3310 if (sdata->vif.bss_conf.twt_requester != twt) {
3311 sdata->vif.bss_conf.twt_requester = twt;
3312 return BSS_CHANGED_TWT;
3317 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3318 struct cfg80211_bss *cbss,
3319 struct ieee80211_mgmt *mgmt, size_t len,
3320 struct ieee802_11_elems *elems)
3322 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3323 struct ieee80211_local *local = sdata->local;
3324 struct ieee80211_supported_band *sband;
3325 struct sta_info *sta;
3326 u16 capab_info, aid;
3327 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3328 const struct cfg80211_bss_ies *bss_ies = NULL;
3329 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3330 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3331 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
3337 /* AssocResp and ReassocResp have identical structure */
3339 pos = mgmt->u.assoc_resp.variable;
3340 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3342 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable;
3345 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3346 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, elems,
3347 mgmt->bssid, assoc_data->bss->bssid);
3349 if (elems->aid_resp)
3350 aid = le16_to_cpu(elems->aid_resp->aid);
3353 * The 5 MSB of the AID field are reserved
3354 * (802.11-2016 9.4.1.8 AID field)
3358 ifmgd->broken_ap = false;
3360 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3361 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3364 ifmgd->broken_ap = true;
3367 if (!is_s1g && !elems->supp_rates) {
3368 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3372 sdata->vif.bss_conf.aid = aid;
3373 ifmgd->tdls_chan_switch_prohibited =
3374 elems->ext_capab && elems->ext_capab_len >= 5 &&
3375 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3378 * Some APs are erroneously not including some information in their
3379 * (re)association response frames. Try to recover by using the data
3380 * from the beacon or probe response. This seems to afflict mobile
3381 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3382 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3385 ((assoc_data->wmm && !elems->wmm_param) ||
3386 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3387 (!elems->ht_cap_elem || !elems->ht_operation)) ||
3388 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3389 (!elems->vht_cap_elem || !elems->vht_operation)))) {
3390 const struct cfg80211_bss_ies *ies;
3391 struct ieee802_11_elems bss_elems;
3394 ies = rcu_dereference(cbss->ies);
3396 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3402 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3405 assoc_data->bss->bssid);
3406 if (assoc_data->wmm &&
3407 !elems->wmm_param && bss_elems.wmm_param) {
3408 elems->wmm_param = bss_elems.wmm_param;
3410 "AP bug: WMM param missing from AssocResp\n");
3414 * Also check if we requested HT/VHT, otherwise the AP doesn't
3415 * have to include the IEs in the (re)association response.
3417 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem &&
3418 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3419 elems->ht_cap_elem = bss_elems.ht_cap_elem;
3421 "AP bug: HT capability missing from AssocResp\n");
3423 if (!elems->ht_operation && bss_elems.ht_operation &&
3424 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3425 elems->ht_operation = bss_elems.ht_operation;
3427 "AP bug: HT operation missing from AssocResp\n");
3429 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem &&
3430 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3431 elems->vht_cap_elem = bss_elems.vht_cap_elem;
3433 "AP bug: VHT capa missing from AssocResp\n");
3435 if (!elems->vht_operation && bss_elems.vht_operation &&
3436 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3437 elems->vht_operation = bss_elems.vht_operation;
3439 "AP bug: VHT operation missing from AssocResp\n");
3444 * We previously checked these in the beacon/probe response, so
3445 * they should be present here. This is just a safety net.
3447 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3448 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3450 "HT AP is missing WMM params or HT capability/operation\n");
3455 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3456 (!elems->vht_cap_elem || !elems->vht_operation)) {
3458 "VHT AP is missing VHT capability/operation\n");
3463 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3464 !elems->he_6ghz_capa) {
3466 "HE 6 GHz AP is missing HE 6 GHz band capability\n");
3471 mutex_lock(&sdata->local->sta_mtx);
3473 * station info was already allocated and inserted before
3474 * the association and should be available to us
3476 sta = sta_info_get(sdata, cbss->bssid);
3477 if (WARN_ON(!sta)) {
3478 mutex_unlock(&sdata->local->sta_mtx);
3483 sband = ieee80211_get_sband(sdata);
3485 mutex_unlock(&sdata->local->sta_mtx);
3490 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3491 (!elems->he_cap || !elems->he_operation)) {
3492 mutex_unlock(&sdata->local->sta_mtx);
3494 "HE AP is missing HE capability/operation\n");
3499 /* Set up internal HT/VHT capabilities */
3500 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3501 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3502 elems->ht_cap_elem, sta);
3504 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3505 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3506 elems->vht_cap_elem, sta);
3508 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3510 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3513 elems->he_6ghz_capa,
3516 bss_conf->he_support = sta->sta.he_cap.has_he;
3517 if (elems->rsnx && elems->rsnx_len &&
3518 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
3519 wiphy_ext_feature_isset(local->hw.wiphy,
3520 NL80211_EXT_FEATURE_PROTECTED_TWT))
3521 bss_conf->twt_protected = true;
3523 bss_conf->twt_protected = false;
3525 changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
3527 bss_conf->he_support = false;
3528 bss_conf->twt_requester = false;
3529 bss_conf->twt_protected = false;
3532 if (bss_conf->he_support) {
3533 bss_conf->he_bss_color.color =
3534 le32_get_bits(elems->he_operation->he_oper_params,
3535 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3536 bss_conf->he_bss_color.partial =
3537 le32_get_bits(elems->he_operation->he_oper_params,
3538 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
3539 bss_conf->he_bss_color.enabled =
3540 !le32_get_bits(elems->he_operation->he_oper_params,
3541 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3543 if (bss_conf->he_bss_color.enabled)
3544 changed |= BSS_CHANGED_HE_BSS_COLOR;
3546 bss_conf->htc_trig_based_pkt_ext =
3547 le32_get_bits(elems->he_operation->he_oper_params,
3548 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3549 bss_conf->frame_time_rts_th =
3550 le32_get_bits(elems->he_operation->he_oper_params,
3551 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3553 bss_conf->uora_exists = !!elems->uora_element;
3554 if (elems->uora_element)
3555 bss_conf->uora_ocw_range = elems->uora_element[0];
3557 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
3558 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
3559 /* TODO: OPEN: what happens if BSS color disable is set? */
3562 if (cbss->transmitted_bss) {
3563 bss_conf->nontransmitted = true;
3564 ether_addr_copy(bss_conf->transmitter_bssid,
3565 cbss->transmitted_bss->bssid);
3566 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3567 bss_conf->bssid_index = cbss->bssid_index;
3571 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3572 * in their association response, so ignore that data for our own
3573 * configuration. If it changed since the last beacon, we'll get the
3574 * next beacon and update then.
3578 * If an operating mode notification IE is present, override the
3579 * NSS calculation (that would be done in rate_control_rate_init())
3580 * and use the # of streams from that element.
3582 if (elems->opmode_notif &&
3583 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3586 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3587 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3589 sta->sta.rx_nss = nss;
3592 rate_control_rate_init(sta);
3594 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3595 set_sta_flag(sta, WLAN_STA_MFP);
3596 sta->sta.mfp = true;
3598 sta->sta.mfp = false;
3601 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
3602 local->hw.queues >= IEEE80211_NUM_ACS;
3604 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3605 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3606 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3609 "failed to move station %pM to desired state\n",
3611 WARN_ON(__sta_info_destroy(sta));
3612 mutex_unlock(&sdata->local->sta_mtx);
3617 if (sdata->wdev.use_4addr)
3618 drv_sta_set_4addr(local, sdata, &sta->sta, true);
3620 mutex_unlock(&sdata->local->sta_mtx);
3623 * Always handle WMM once after association regardless
3624 * of the first value the AP uses. Setting -1 here has
3625 * that effect because the AP values is an unsigned
3628 ifmgd->wmm_last_param_set = -1;
3629 ifmgd->mu_edca_last_param_set = -1;
3631 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3632 ieee80211_set_wmm_default(sdata, false, false);
3633 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
3634 elems->wmm_param_len,
3635 elems->mu_edca_param_set)) {
3636 /* still enable QoS since we might have HT/VHT */
3637 ieee80211_set_wmm_default(sdata, false, true);
3638 /* set the disable-WMM flag in this case to disable
3639 * tracking WMM parameter changes in the beacon if
3640 * the parameters weren't actually valid. Doing so
3641 * avoids changing parameters very strangely when
3642 * the AP is going back and forth between valid and
3643 * invalid parameters.
3645 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3647 changed |= BSS_CHANGED_QOS;
3649 if (elems->max_idle_period_ie) {
3650 bss_conf->max_idle_period =
3651 le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3652 bss_conf->protected_keep_alive =
3653 !!(elems->max_idle_period_ie->idle_options &
3654 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3655 changed |= BSS_CHANGED_KEEP_ALIVE;
3657 bss_conf->max_idle_period = 0;
3658 bss_conf->protected_keep_alive = false;
3661 /* set assoc capability (AID was already set earlier),
3662 * ieee80211_set_associated() will tell the driver */
3663 bss_conf->assoc_capability = capab_info;
3664 ieee80211_set_associated(sdata, cbss, changed);
3667 * If we're using 4-addr mode, let the AP know that we're
3668 * doing so, so that it can create the STA VLAN on its side
3670 if (ifmgd->use_4addr)
3671 ieee80211_send_4addr_nullfunc(local, sdata);
3674 * Start timer to probe the connection to the AP now.
3675 * Also start the timer that will detect beacon loss.
3677 ieee80211_sta_reset_beacon_monitor(sdata);
3678 ieee80211_sta_reset_conn_monitor(sdata);
3686 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3687 struct ieee80211_mgmt *mgmt,
3690 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3691 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3692 u16 capab_info, status_code, aid;
3693 struct ieee802_11_elems elems;
3694 int ac, uapsd_queues = -1;
3697 struct cfg80211_bss *cbss;
3698 struct ieee80211_event event = {
3700 .u.mlme.data = ASSOC_EVENT,
3703 sdata_assert_lock(sdata);
3708 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3711 cbss = assoc_data->bss;
3714 * AssocResp and ReassocResp have identical structure, so process both
3715 * of them in this function.
3721 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3722 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3723 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3724 pos = mgmt->u.assoc_resp.variable;
3725 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3726 if (cbss->channel->band == NL80211_BAND_S1GHZ) {
3727 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable;
3732 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3733 reassoc ? "Rea" : "A", mgmt->sa,
3734 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3736 if (assoc_data->fils_kek_len &&
3737 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3740 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3741 mgmt->bssid, assoc_data->bss->bssid);
3743 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3744 elems.timeout_int &&
3745 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3747 tu = le32_to_cpu(elems.timeout_int->value);
3748 ms = tu * 1024 / 1000;
3750 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3752 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3753 assoc_data->timeout_started = true;
3754 if (ms > IEEE80211_ASSOC_TIMEOUT)
3755 run_again(sdata, assoc_data->timeout);
3759 if (status_code != WLAN_STATUS_SUCCESS) {
3760 sdata_info(sdata, "%pM denied association (code=%d)\n",
3761 mgmt->sa, status_code);
3762 ieee80211_destroy_assoc_data(sdata, false, false);
3763 event.u.mlme.status = MLME_DENIED;
3764 event.u.mlme.reason = status_code;
3765 drv_event_callback(sdata->local, sdata, &event);
3767 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, &elems)) {
3768 /* oops -- internal error -- send timeout for now */
3769 ieee80211_destroy_assoc_data(sdata, false, false);
3770 cfg80211_assoc_timeout(sdata->dev, cbss);
3773 event.u.mlme.status = MLME_SUCCESS;
3774 drv_event_callback(sdata->local, sdata, &event);
3775 sdata_info(sdata, "associated\n");
3778 * destroy assoc_data afterwards, as otherwise an idle
3779 * recalc after assoc_data is NULL but before associated
3780 * is set can cause the interface to go idle
3782 ieee80211_destroy_assoc_data(sdata, true, false);
3784 /* get uapsd queues configuration */
3786 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3787 if (sdata->tx_conf[ac].uapsd)
3788 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3791 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues,
3792 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3795 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3796 struct ieee80211_mgmt *mgmt, size_t len,
3797 struct ieee80211_rx_status *rx_status)
3799 struct ieee80211_local *local = sdata->local;
3800 struct ieee80211_bss *bss;
3801 struct ieee80211_channel *channel;
3803 sdata_assert_lock(sdata);
3805 channel = ieee80211_get_channel_khz(local->hw.wiphy,
3806 ieee80211_rx_status_to_khz(rx_status));
3810 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3812 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3813 ieee80211_rx_bss_put(local, bss);
3818 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3819 struct sk_buff *skb)
3821 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3822 struct ieee80211_if_managed *ifmgd;
3823 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3824 struct ieee80211_channel *channel;
3825 size_t baselen, len = skb->len;
3827 ifmgd = &sdata->u.mgd;
3829 sdata_assert_lock(sdata);
3832 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
3833 * "If a 6 GHz AP receives a Probe Request frame and responds with
3834 * a Probe Response frame [..], the Address 1 field of the Probe
3835 * Response frame shall be set to the broadcast address [..]"
3836 * So, on 6GHz band we should also accept broadcast responses.
3838 channel = ieee80211_get_channel(sdata->local->hw.wiphy,
3843 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
3844 (channel->band != NL80211_BAND_6GHZ ||
3845 !is_broadcast_ether_addr(mgmt->da)))
3846 return; /* ignore ProbeResp to foreign address */
3848 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3852 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3854 if (ifmgd->associated &&
3855 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3856 ieee80211_reset_ap_probe(sdata);
3860 * This is the canonical list of information elements we care about,
3861 * the filter code also gives us all changes to the Microsoft OUI
3862 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3863 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3864 * changes to requested client power.
3866 * We implement beacon filtering in software since that means we can
3867 * avoid processing the frame here and in cfg80211, and userspace
3868 * will not be able to tell whether the hardware supports it or not.
3870 * XXX: This list needs to be dynamic -- userspace needs to be able to
3871 * add items it requires. It also needs to be able to tell us to
3872 * look out for other vendor IEs.
3874 static const u64 care_about_ies =
3875 (1ULL << WLAN_EID_COUNTRY) |
3876 (1ULL << WLAN_EID_ERP_INFO) |
3877 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3878 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3879 (1ULL << WLAN_EID_HT_CAPABILITY) |
3880 (1ULL << WLAN_EID_HT_OPERATION) |
3881 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3883 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3884 struct ieee80211_if_managed *ifmgd,
3885 struct ieee80211_bss_conf *bss_conf,
3886 struct ieee80211_local *local,
3887 struct ieee80211_rx_status *rx_status)
3889 /* Track average RSSI from the Beacon frames of the current AP */
3891 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3892 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3893 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3894 ifmgd->last_cqm_event_signal = 0;
3895 ifmgd->count_beacon_signal = 1;
3896 ifmgd->last_ave_beacon_signal = 0;
3898 ifmgd->count_beacon_signal++;
3901 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3903 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3904 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3905 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3906 int last_sig = ifmgd->last_ave_beacon_signal;
3907 struct ieee80211_event event = {
3912 * if signal crosses either of the boundaries, invoke callback
3913 * with appropriate parameters
3915 if (sig > ifmgd->rssi_max_thold &&
3916 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3917 ifmgd->last_ave_beacon_signal = sig;
3918 event.u.rssi.data = RSSI_EVENT_HIGH;
3919 drv_event_callback(local, sdata, &event);
3920 } else if (sig < ifmgd->rssi_min_thold &&
3921 (last_sig >= ifmgd->rssi_max_thold ||
3923 ifmgd->last_ave_beacon_signal = sig;
3924 event.u.rssi.data = RSSI_EVENT_LOW;
3925 drv_event_callback(local, sdata, &event);
3929 if (bss_conf->cqm_rssi_thold &&
3930 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3931 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3932 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3933 int last_event = ifmgd->last_cqm_event_signal;
3934 int thold = bss_conf->cqm_rssi_thold;
3935 int hyst = bss_conf->cqm_rssi_hyst;
3938 (last_event == 0 || sig < last_event - hyst)) {
3939 ifmgd->last_cqm_event_signal = sig;
3940 ieee80211_cqm_rssi_notify(
3942 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3944 } else if (sig > thold &&
3945 (last_event == 0 || sig > last_event + hyst)) {
3946 ifmgd->last_cqm_event_signal = sig;
3947 ieee80211_cqm_rssi_notify(
3949 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3954 if (bss_conf->cqm_rssi_low &&
3955 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3956 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3957 int last_event = ifmgd->last_cqm_event_signal;
3958 int low = bss_conf->cqm_rssi_low;
3959 int high = bss_conf->cqm_rssi_high;
3962 (last_event == 0 || last_event >= low)) {
3963 ifmgd->last_cqm_event_signal = sig;
3964 ieee80211_cqm_rssi_notify(
3966 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3968 } else if (sig > high &&
3969 (last_event == 0 || last_event <= high)) {
3970 ifmgd->last_cqm_event_signal = sig;
3971 ieee80211_cqm_rssi_notify(
3973 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3979 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3980 struct cfg80211_bss *bss)
3982 if (ether_addr_equal(tx_bssid, bss->bssid))
3984 if (!bss->transmitted_bss)
3986 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3989 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3990 struct ieee80211_hdr *hdr, size_t len,
3991 struct ieee80211_rx_status *rx_status)
3993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3994 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3995 struct ieee80211_mgmt *mgmt = (void *) hdr;
3997 struct ieee802_11_elems elems;
3998 struct ieee80211_local *local = sdata->local;
3999 struct ieee80211_chanctx_conf *chanctx_conf;
4000 struct ieee80211_channel *chan;
4001 struct sta_info *sta;
4006 u8 *bssid, *variable = mgmt->u.beacon.variable;
4007 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
4009 sdata_assert_lock(sdata);
4011 /* Process beacon from the current BSS */
4012 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
4013 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
4014 struct ieee80211_ext *ext = (void *) mgmt;
4016 if (ieee80211_is_s1g_short_beacon(ext->frame_control))
4017 variable = ext->u.s1g_short_beacon.variable;
4019 variable = ext->u.s1g_beacon.variable;
4022 baselen = (u8 *) variable - (u8 *) mgmt;
4027 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4028 if (!chanctx_conf) {
4033 if (ieee80211_rx_status_to_khz(rx_status) !=
4034 ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
4038 chan = chanctx_conf->def.chan;
4041 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
4042 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) {
4043 ieee802_11_parse_elems(variable,
4044 len - baselen, false, &elems,
4046 ifmgd->assoc_data->bss->bssid);
4048 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4050 if (elems.dtim_period)
4051 ifmgd->dtim_period = elems.dtim_period;
4052 ifmgd->have_beacon = true;
4053 ifmgd->assoc_data->need_beacon = false;
4054 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4055 sdata->vif.bss_conf.sync_tsf =
4056 le64_to_cpu(mgmt->u.beacon.timestamp);
4057 sdata->vif.bss_conf.sync_device_ts =
4058 rx_status->device_timestamp;
4059 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
4062 if (elems.mbssid_config_ie)
4063 bss_conf->profile_periodicity =
4064 elems.mbssid_config_ie->profile_periodicity;
4066 if (elems.ext_capab_len >= 11 &&
4067 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
4068 bss_conf->ema_ap = true;
4070 /* continue assoc process */
4071 ifmgd->assoc_data->timeout = jiffies;
4072 ifmgd->assoc_data->timeout_started = true;
4073 run_again(sdata, ifmgd->assoc_data->timeout);
4077 if (!ifmgd->associated ||
4078 !ieee80211_rx_our_beacon(bssid, ifmgd->associated))
4080 bssid = ifmgd->associated->bssid;
4082 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
4083 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
4086 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
4087 mlme_dbg_ratelimited(sdata,
4088 "cancelling AP probe due to a received beacon\n");
4089 ieee80211_reset_ap_probe(sdata);
4093 * Push the beacon loss detection into the future since
4094 * we are processing a beacon from the AP just now.
4096 ieee80211_sta_reset_beacon_monitor(sdata);
4098 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility
4099 * element (which carries the beacon interval). Don't forget to add a
4100 * bit to care_about_ies[] above if mac80211 is interested in a
4101 * changing S1G element.
4103 if (!ieee80211_is_s1g_beacon(hdr->frame_control))
4104 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
4105 ncrc = ieee802_11_parse_elems_crc(variable,
4106 len - baselen, false, &elems,
4107 care_about_ies, ncrc,
4108 mgmt->bssid, bssid);
4110 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
4111 ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) {
4112 if (local->hw.conf.dynamic_ps_timeout > 0) {
4113 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
4114 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
4115 ieee80211_hw_config(local,
4116 IEEE80211_CONF_CHANGE_PS);
4118 ieee80211_send_nullfunc(local, sdata, false);
4119 } else if (!local->pspolling && sdata->u.mgd.powersave) {
4120 local->pspolling = true;
4123 * Here is assumed that the driver will be
4124 * able to send ps-poll frame and receive a
4125 * response even though power save mode is
4126 * enabled, but some drivers might require
4127 * to disable power save here. This needs
4128 * to be investigated.
4130 ieee80211_send_pspoll(local, sdata);
4134 if (sdata->vif.p2p ||
4135 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
4136 struct ieee80211_p2p_noa_attr noa = {};
4139 ret = cfg80211_get_p2p_attr(variable,
4141 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
4142 (u8 *) &noa, sizeof(noa));
4144 if (sdata->u.mgd.p2p_noa_index != noa.index) {
4145 /* valid noa_attr and index changed */
4146 sdata->u.mgd.p2p_noa_index = noa.index;
4147 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
4148 changed |= BSS_CHANGED_P2P_PS;
4150 * make sure we update all information, the CRC
4151 * mechanism doesn't look at P2P attributes.
4153 ifmgd->beacon_crc_valid = false;
4155 } else if (sdata->u.mgd.p2p_noa_index != -1) {
4156 /* noa_attr not found and we had valid noa_attr before */
4157 sdata->u.mgd.p2p_noa_index = -1;
4158 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
4159 changed |= BSS_CHANGED_P2P_PS;
4160 ifmgd->beacon_crc_valid = false;
4164 if (ifmgd->csa_waiting_bcn)
4165 ieee80211_chswitch_post_beacon(sdata);
4168 * Update beacon timing and dtim count on every beacon appearance. This
4169 * will allow the driver to use the most updated values. Do it before
4170 * comparing this one with last received beacon.
4171 * IMPORTANT: These parameters would possibly be out of sync by the time
4172 * the driver will use them. The synchronized view is currently
4173 * guaranteed only in certain callbacks.
4175 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
4176 !ieee80211_is_s1g_beacon(hdr->frame_control)) {
4177 sdata->vif.bss_conf.sync_tsf =
4178 le64_to_cpu(mgmt->u.beacon.timestamp);
4179 sdata->vif.bss_conf.sync_device_ts =
4180 rx_status->device_timestamp;
4181 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
4184 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) ||
4185 ieee80211_is_s1g_short_beacon(mgmt->frame_control))
4187 ifmgd->beacon_crc = ncrc;
4188 ifmgd->beacon_crc_valid = true;
4190 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4192 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
4193 rx_status->device_timestamp,
4196 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
4197 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
4198 elems.wmm_param_len,
4199 elems.mu_edca_param_set))
4200 changed |= BSS_CHANGED_QOS;
4203 * If we haven't had a beacon before, tell the driver about the
4204 * DTIM period (and beacon timing if desired) now.
4206 if (!ifmgd->have_beacon) {
4207 /* a few bogus AP send dtim_period = 0 or no TIM IE */
4208 bss_conf->dtim_period = elems.dtim_period ?: 1;
4210 changed |= BSS_CHANGED_BEACON_INFO;
4211 ifmgd->have_beacon = true;
4213 mutex_lock(&local->iflist_mtx);
4214 ieee80211_recalc_ps(local);
4215 mutex_unlock(&local->iflist_mtx);
4217 ieee80211_recalc_ps_vif(sdata);
4220 if (elems.erp_info) {
4222 erp_value = elems.erp_info[0];
4227 if (!ieee80211_is_s1g_beacon(hdr->frame_control))
4228 changed |= ieee80211_handle_bss_capability(sdata,
4229 le16_to_cpu(mgmt->u.beacon.capab_info),
4230 erp_valid, erp_value);
4232 mutex_lock(&local->sta_mtx);
4233 sta = sta_info_get(sdata, bssid);
4235 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4237 if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem,
4238 elems.vht_cap_elem, elems.ht_operation,
4239 elems.vht_operation, elems.he_operation,
4240 elems.s1g_oper, bssid, &changed)) {
4241 mutex_unlock(&local->sta_mtx);
4243 "failed to follow AP %pM bandwidth change, disconnect\n",
4245 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4246 WLAN_REASON_DEAUTH_LEAVING,
4248 ieee80211_report_disconnect(sdata, deauth_buf,
4249 sizeof(deauth_buf), true,
4250 WLAN_REASON_DEAUTH_LEAVING,
4255 if (sta && elems.opmode_notif)
4256 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4258 mutex_unlock(&local->sta_mtx);
4260 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4262 elems.country_elem_len,
4263 elems.pwr_constr_elem,
4264 elems.cisco_dtpc_elem);
4266 ieee80211_bss_info_change_notify(sdata, changed);
4269 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
4270 struct sk_buff *skb)
4272 struct ieee80211_rx_status *rx_status;
4273 struct ieee80211_hdr *hdr;
4276 rx_status = (struct ieee80211_rx_status *) skb->cb;
4277 hdr = (struct ieee80211_hdr *) skb->data;
4278 fc = le16_to_cpu(hdr->frame_control);
4281 switch (fc & IEEE80211_FCTL_STYPE) {
4282 case IEEE80211_STYPE_S1G_BEACON:
4283 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status);
4286 sdata_unlock(sdata);
4289 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4290 struct sk_buff *skb)
4292 struct ieee80211_rx_status *rx_status;
4293 struct ieee80211_mgmt *mgmt;
4295 struct ieee802_11_elems elems;
4298 rx_status = (struct ieee80211_rx_status *) skb->cb;
4299 mgmt = (struct ieee80211_mgmt *) skb->data;
4300 fc = le16_to_cpu(mgmt->frame_control);
4304 switch (fc & IEEE80211_FCTL_STYPE) {
4305 case IEEE80211_STYPE_BEACON:
4306 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt,
4307 skb->len, rx_status);
4309 case IEEE80211_STYPE_PROBE_RESP:
4310 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4312 case IEEE80211_STYPE_AUTH:
4313 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4315 case IEEE80211_STYPE_DEAUTH:
4316 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4318 case IEEE80211_STYPE_DISASSOC:
4319 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4321 case IEEE80211_STYPE_ASSOC_RESP:
4322 case IEEE80211_STYPE_REASSOC_RESP:
4323 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4325 case IEEE80211_STYPE_ACTION:
4326 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4327 ies_len = skb->len -
4328 offsetof(struct ieee80211_mgmt,
4329 u.action.u.chan_switch.variable);
4334 /* CSA IE cannot be overridden, no need for BSSID */
4335 ieee802_11_parse_elems(
4336 mgmt->u.action.u.chan_switch.variable,
4337 ies_len, true, &elems, mgmt->bssid, NULL);
4339 if (elems.parse_error)
4342 ieee80211_sta_process_chanswitch(sdata,
4344 rx_status->device_timestamp,
4346 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4347 ies_len = skb->len -
4348 offsetof(struct ieee80211_mgmt,
4349 u.action.u.ext_chan_switch.variable);
4355 * extended CSA IE can't be overridden, no need for
4358 ieee802_11_parse_elems(
4359 mgmt->u.action.u.ext_chan_switch.variable,
4360 ies_len, true, &elems, mgmt->bssid, NULL);
4362 if (elems.parse_error)
4365 /* for the handling code pretend this was also an IE */
4366 elems.ext_chansw_ie =
4367 &mgmt->u.action.u.ext_chan_switch.data;
4369 ieee80211_sta_process_chanswitch(sdata,
4371 rx_status->device_timestamp,
4376 sdata_unlock(sdata);
4379 static void ieee80211_sta_timer(struct timer_list *t)
4381 struct ieee80211_sub_if_data *sdata =
4382 from_timer(sdata, t, u.mgd.timer);
4384 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4387 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4388 u8 *bssid, u8 reason, bool tx)
4390 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4392 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4395 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4399 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4401 struct ieee80211_local *local = sdata->local;
4402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4403 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4407 u16 prepare_tx_duration = 0;
4409 sdata_assert_lock(sdata);
4411 if (WARN_ON_ONCE(!auth_data))
4416 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4417 sdata_info(sdata, "authentication with %pM timed out\n",
4418 auth_data->bss->bssid);
4421 * Most likely AP is not in the range so remove the
4422 * bss struct for that AP.
4424 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4429 if (auth_data->algorithm == WLAN_AUTH_SAE)
4430 prepare_tx_duration =
4431 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4433 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4435 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4436 auth_data->bss->bssid, auth_data->tries,
4437 IEEE80211_AUTH_MAX_TRIES);
4439 auth_data->expected_transaction = 2;
4441 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4442 trans = auth_data->sae_trans;
4443 status = auth_data->sae_status;
4444 auth_data->expected_transaction = trans;
4447 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4448 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4449 IEEE80211_TX_INTFL_MLME_CONN_TX;
4451 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4452 auth_data->data, auth_data->data_len,
4453 auth_data->bss->bssid,
4454 auth_data->bss->bssid, NULL, 0, 0,
4457 if (tx_flags == 0) {
4458 if (auth_data->algorithm == WLAN_AUTH_SAE)
4459 auth_data->timeout = jiffies +
4460 IEEE80211_AUTH_TIMEOUT_SAE;
4462 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4464 auth_data->timeout =
4465 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4468 auth_data->timeout_started = true;
4469 run_again(sdata, auth_data->timeout);
4474 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4476 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4477 struct ieee80211_local *local = sdata->local;
4479 sdata_assert_lock(sdata);
4481 assoc_data->tries++;
4482 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4483 sdata_info(sdata, "association with %pM timed out\n",
4484 assoc_data->bss->bssid);
4487 * Most likely AP is not in the range so remove the
4488 * bss struct for that AP.
4490 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4495 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4496 assoc_data->bss->bssid, assoc_data->tries,
4497 IEEE80211_ASSOC_MAX_TRIES);
4498 ieee80211_send_assoc(sdata);
4500 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4501 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4502 assoc_data->timeout_started = true;
4503 run_again(sdata, assoc_data->timeout);
4505 assoc_data->timeout =
4506 round_jiffies_up(jiffies +
4507 IEEE80211_ASSOC_TIMEOUT_LONG);
4508 assoc_data->timeout_started = true;
4509 run_again(sdata, assoc_data->timeout);
4515 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4516 __le16 fc, bool acked)
4518 struct ieee80211_local *local = sdata->local;
4520 sdata->u.mgd.status_fc = fc;
4521 sdata->u.mgd.status_acked = acked;
4522 sdata->u.mgd.status_received = true;
4524 ieee80211_queue_work(&local->hw, &sdata->work);
4527 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4529 struct ieee80211_local *local = sdata->local;
4530 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4534 if (ifmgd->status_received) {
4535 __le16 fc = ifmgd->status_fc;
4536 bool status_acked = ifmgd->status_acked;
4538 ifmgd->status_received = false;
4539 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4541 if (ifmgd->auth_data->algorithm ==
4543 ifmgd->auth_data->timeout =
4545 IEEE80211_AUTH_TIMEOUT_SAE;
4547 ifmgd->auth_data->timeout =
4549 IEEE80211_AUTH_TIMEOUT_SHORT;
4550 run_again(sdata, ifmgd->auth_data->timeout);
4552 ifmgd->auth_data->timeout = jiffies - 1;
4554 ifmgd->auth_data->timeout_started = true;
4555 } else if (ifmgd->assoc_data &&
4556 (ieee80211_is_assoc_req(fc) ||
4557 ieee80211_is_reassoc_req(fc))) {
4559 ifmgd->assoc_data->timeout =
4560 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4561 run_again(sdata, ifmgd->assoc_data->timeout);
4563 ifmgd->assoc_data->timeout = jiffies - 1;
4565 ifmgd->assoc_data->timeout_started = true;
4569 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4570 time_after(jiffies, ifmgd->auth_data->timeout)) {
4571 if (ifmgd->auth_data->done) {
4573 * ok ... we waited for assoc but userspace didn't,
4574 * so let's just kill the auth data
4576 ieee80211_destroy_auth_data(sdata, false);
4577 } else if (ieee80211_auth(sdata)) {
4579 struct ieee80211_event event = {
4581 .u.mlme.data = AUTH_EVENT,
4582 .u.mlme.status = MLME_TIMEOUT,
4585 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4587 ieee80211_destroy_auth_data(sdata, false);
4589 cfg80211_auth_timeout(sdata->dev, bssid);
4590 drv_event_callback(sdata->local, sdata, &event);
4592 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4593 run_again(sdata, ifmgd->auth_data->timeout);
4595 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4596 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4597 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4598 ieee80211_do_assoc(sdata)) {
4599 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4600 struct ieee80211_event event = {
4602 .u.mlme.data = ASSOC_EVENT,
4603 .u.mlme.status = MLME_TIMEOUT,
4606 ieee80211_destroy_assoc_data(sdata, false, false);
4607 cfg80211_assoc_timeout(sdata->dev, bss);
4608 drv_event_callback(sdata->local, sdata, &event);
4610 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4611 run_again(sdata, ifmgd->assoc_data->timeout);
4613 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4614 ifmgd->associated) {
4618 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4620 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4621 max_tries = max_nullfunc_tries;
4623 max_tries = max_probe_tries;
4625 /* ACK received for nullfunc probing frame */
4626 if (!ifmgd->probe_send_count)
4627 ieee80211_reset_ap_probe(sdata);
4628 else if (ifmgd->nullfunc_failed) {
4629 if (ifmgd->probe_send_count < max_tries) {
4631 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4632 bssid, ifmgd->probe_send_count,
4634 ieee80211_mgd_probe_ap_send(sdata);
4637 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4639 ieee80211_sta_connection_lost(sdata, bssid,
4640 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4643 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4644 run_again(sdata, ifmgd->probe_timeout);
4645 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4647 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4648 bssid, probe_wait_ms);
4649 ieee80211_sta_connection_lost(sdata, bssid,
4650 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4651 } else if (ifmgd->probe_send_count < max_tries) {
4653 "No probe response from AP %pM after %dms, try %d/%i\n",
4654 bssid, probe_wait_ms,
4655 ifmgd->probe_send_count, max_tries);
4656 ieee80211_mgd_probe_ap_send(sdata);
4659 * We actually lost the connection ... or did we?
4663 "No probe response from AP %pM after %dms, disconnecting.\n",
4664 bssid, probe_wait_ms);
4666 ieee80211_sta_connection_lost(sdata, bssid,
4667 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4671 sdata_unlock(sdata);
4674 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4676 struct ieee80211_sub_if_data *sdata =
4677 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4680 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4683 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
4686 sdata->u.mgd.connection_loss = false;
4687 ieee80211_queue_work(&sdata->local->hw,
4688 &sdata->u.mgd.beacon_connection_loss_work);
4691 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4693 struct ieee80211_sub_if_data *sdata =
4694 from_timer(sdata, t, u.mgd.conn_mon_timer);
4695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4696 struct ieee80211_local *local = sdata->local;
4697 struct sta_info *sta;
4698 unsigned long timeout;
4700 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4703 sta = sta_info_get(sdata, ifmgd->bssid);
4707 timeout = sta->status_stats.last_ack;
4708 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx))
4709 timeout = sta->rx_stats.last_rx;
4710 timeout += IEEE80211_CONNECTION_IDLE_TIME;
4712 /* If timeout is after now, then update timer to fire at
4713 * the later date, but do not actually probe at this time.
4715 if (time_is_after_jiffies(timeout)) {
4716 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
4720 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4723 static void ieee80211_sta_monitor_work(struct work_struct *work)
4725 struct ieee80211_sub_if_data *sdata =
4726 container_of(work, struct ieee80211_sub_if_data,
4727 u.mgd.monitor_work);
4729 ieee80211_mgd_probe_ap(sdata, false);
4732 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4734 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4735 __ieee80211_stop_poll(sdata);
4737 /* let's probe the connection once */
4738 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4739 ieee80211_queue_work(&sdata->local->hw,
4740 &sdata->u.mgd.monitor_work);
4745 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4747 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4748 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4752 if (ifmgd->auth_data || ifmgd->assoc_data) {
4753 const u8 *bssid = ifmgd->auth_data ?
4754 ifmgd->auth_data->bss->bssid :
4755 ifmgd->assoc_data->bss->bssid;
4758 * If we are trying to authenticate / associate while suspending,
4759 * cfg80211 won't know and won't actually abort those attempts,
4760 * thus we need to do that ourselves.
4762 ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4763 IEEE80211_STYPE_DEAUTH,
4764 WLAN_REASON_DEAUTH_LEAVING,
4766 if (ifmgd->assoc_data)
4767 ieee80211_destroy_assoc_data(sdata, false, true);
4768 if (ifmgd->auth_data)
4769 ieee80211_destroy_auth_data(sdata, false);
4770 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4771 IEEE80211_DEAUTH_FRAME_LEN,
4775 /* This is a bit of a hack - we should find a better and more generic
4776 * solution to this. Normally when suspending, cfg80211 will in fact
4777 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4778 * auth (not so important) or assoc (this is the problem) process.
4780 * As a consequence, it can happen that we are in the process of both
4781 * associating and suspending, and receive an association response
4782 * after cfg80211 has checked if it needs to disconnect, but before
4783 * we actually set the flag to drop incoming frames. This will then
4784 * cause the workqueue flush to process the association response in
4785 * the suspend, resulting in a successful association just before it
4786 * tries to remove the interface from the driver, which now though
4787 * has a channel context assigned ... this results in issues.
4789 * To work around this (for now) simply deauth here again if we're
4792 if (ifmgd->associated && !sdata->local->wowlan) {
4794 struct cfg80211_deauth_request req = {
4795 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4799 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4800 ieee80211_mgd_deauth(sdata, &req);
4803 sdata_unlock(sdata);
4806 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4808 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4811 if (!ifmgd->associated) {
4812 sdata_unlock(sdata);
4816 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4817 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4818 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4819 ieee80211_sta_connection_lost(sdata,
4820 ifmgd->associated->bssid,
4821 WLAN_REASON_UNSPECIFIED,
4823 sdata_unlock(sdata);
4826 sdata_unlock(sdata);
4830 /* interface setup */
4831 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4833 struct ieee80211_if_managed *ifmgd;
4835 ifmgd = &sdata->u.mgd;
4836 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4837 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4838 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4839 ieee80211_beacon_connection_loss_work);
4840 INIT_WORK(&ifmgd->csa_connection_drop_work,
4841 ieee80211_csa_connection_drop_work);
4842 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4843 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4844 ieee80211_tdls_peer_del_work);
4845 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4846 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4847 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4848 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4849 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4850 ieee80211_sta_handle_tspec_ac_params_wk);
4853 ifmgd->powersave = sdata->wdev.ps;
4854 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4855 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4856 ifmgd->p2p_noa_index = -1;
4858 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4859 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4861 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4863 /* Setup TDLS data */
4864 spin_lock_init(&ifmgd->teardown_lock);
4865 ifmgd->teardown_skb = NULL;
4866 ifmgd->orig_teardown_skb = NULL;
4869 /* scan finished notification */
4870 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4872 struct ieee80211_sub_if_data *sdata;
4874 /* Restart STA timers */
4876 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4877 if (ieee80211_sdata_running(sdata))
4878 ieee80211_restart_sta_timer(sdata);
4883 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4884 struct cfg80211_bss *cbss)
4886 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4887 const u8 *ht_cap_ie, *vht_cap_ie;
4888 const struct ieee80211_ht_cap *ht_cap;
4889 const struct ieee80211_vht_cap *vht_cap;
4892 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4895 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4896 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4897 ht_cap = (void *)(ht_cap_ie + 2);
4898 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4900 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4901 * "Tx Unequal Modulation Supported" fields.
4905 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4908 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4909 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4913 vht_cap = (void *)(vht_cap_ie + 2);
4914 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4915 for (nss = 8; nss > 0; nss--) {
4916 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4917 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4920 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4921 chains = max(chains, nss);
4928 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4929 const struct ieee80211_he_operation *he_op)
4931 const struct ieee80211_sta_he_cap *sta_he_cap =
4932 ieee80211_get_he_sta_cap(sband);
4936 if (!sta_he_cap || !he_op)
4939 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4941 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4942 for (i = 0; i < 3; i++) {
4943 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4944 &sta_he_cap->he_mcs_nss_supp;
4945 u16 sta_mcs_map_rx =
4946 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4947 u16 sta_mcs_map_tx =
4948 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4950 bool verified = true;
4953 * For each band there is a maximum of 8 spatial streams
4954 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4955 * of 2 bits per NSS (1-8), with the values defined in enum
4956 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4957 * capabilities aren't less than the AP's minimum requirements
4958 * for this HE BSS per SS.
4959 * It is enough to find one such band that meets the reqs.
4961 for (nss = 8; nss > 0; nss--) {
4962 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4963 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4964 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4966 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4970 * Make sure the HE AP doesn't require MCSs that aren't
4971 * supported by the client
4973 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4974 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4975 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4985 /* If here, STA doesn't meet AP's HE min requirements */
4989 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4990 struct cfg80211_bss *cbss)
4992 struct ieee80211_local *local = sdata->local;
4993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4994 const struct ieee80211_ht_cap *ht_cap = NULL;
4995 const struct ieee80211_ht_operation *ht_oper = NULL;
4996 const struct ieee80211_vht_operation *vht_oper = NULL;
4997 const struct ieee80211_he_operation *he_oper = NULL;
4998 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
4999 struct ieee80211_supported_band *sband;
5000 struct cfg80211_chan_def chandef;
5001 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
5002 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
5003 struct ieee80211_bss *bss = (void *)cbss->priv;
5008 sband = local->hw.wiphy->bands[cbss->channel->band];
5010 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
5011 IEEE80211_STA_DISABLE_80P80MHZ |
5012 IEEE80211_STA_DISABLE_160MHZ);
5014 /* disable HT/VHT/HE if we don't support them */
5015 if (!sband->ht_cap.ht_supported && !is_6ghz) {
5016 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5017 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5018 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5021 if (!sband->vht_cap.vht_supported && is_5ghz) {
5022 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5023 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5026 if (!ieee80211_get_he_sta_cap(sband))
5027 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5031 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
5032 const u8 *ht_oper_ie, *ht_cap_ie;
5034 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
5035 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
5036 ht_oper = (void *)(ht_oper_ie + 2);
5038 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
5039 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
5040 ht_cap = (void *)(ht_cap_ie + 2);
5043 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5048 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) {
5049 const u8 *vht_oper_ie, *vht_cap;
5051 vht_oper_ie = ieee80211_bss_get_ie(cbss,
5052 WLAN_EID_VHT_OPERATION);
5053 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
5054 vht_oper = (void *)(vht_oper_ie + 2);
5055 if (vht_oper && !ht_oper) {
5058 "AP advertised VHT without HT, disabling HT/VHT/HE\n");
5059 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5060 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5061 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5064 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
5065 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
5066 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5071 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
5072 const struct cfg80211_bss_ies *ies;
5073 const u8 *he_oper_ie;
5075 ies = rcu_dereference(cbss->ies);
5076 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
5077 ies->data, ies->len);
5079 he_oper_ie[1] >= ieee80211_he_oper_size(&he_oper_ie[3]))
5080 he_oper = (void *)(he_oper_ie + 3);
5084 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
5085 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5088 /* Allow VHT if at least one channel on the sband supports 80 MHz */
5090 for (i = 0; i < sband->n_channels; i++) {
5091 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
5092 IEEE80211_CHAN_NO_80MHZ))
5100 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5102 if (sband->band == NL80211_BAND_S1GHZ) {
5103 const u8 *s1g_oper_ie;
5105 s1g_oper_ie = ieee80211_bss_get_ie(cbss,
5106 WLAN_EID_S1G_OPERATION);
5107 if (s1g_oper_ie && s1g_oper_ie[1] >= sizeof(*s1g_oper))
5108 s1g_oper = (void *)(s1g_oper_ie + 2);
5111 "AP missing S1G operation element?\n");
5114 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
5117 ht_oper, vht_oper, he_oper,
5121 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
5126 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) {
5127 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
5131 /* will change later if needed */
5132 sdata->smps_mode = IEEE80211_SMPS_OFF;
5134 mutex_lock(&local->mtx);
5136 * If this fails (possibly due to channel context sharing
5137 * on incompatible channels, e.g. 80+80 and 160 sharing the
5138 * same control channel) try to use a smaller bandwidth.
5140 ret = ieee80211_vif_use_channel(sdata, &chandef,
5141 IEEE80211_CHANCTX_SHARED);
5143 /* don't downgrade for 5 and 10 MHz channels, though. */
5144 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
5145 chandef.width == NL80211_CHAN_WIDTH_10)
5148 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
5149 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
5150 ret = ieee80211_vif_use_channel(sdata, &chandef,
5151 IEEE80211_CHANCTX_SHARED);
5154 mutex_unlock(&local->mtx);
5158 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
5159 u8 *dtim_count, u8 *dtim_period)
5161 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
5162 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
5164 const struct ieee80211_tim_ie *tim = NULL;
5165 const struct ieee80211_bssid_index *idx;
5166 bool valid = tim_ie && tim_ie[1] >= 2;
5169 tim = (void *)(tim_ie + 2);
5172 *dtim_count = valid ? tim->dtim_count : 0;
5175 *dtim_period = valid ? tim->dtim_period : 0;
5177 /* Check if value is overridden by non-transmitted profile */
5178 if (!idx_ie || idx_ie[1] < 3)
5181 idx = (void *)(idx_ie + 2);
5184 *dtim_count = idx->dtim_count;
5187 *dtim_period = idx->dtim_period;
5192 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5193 struct cfg80211_bss *cbss, bool assoc,
5196 struct ieee80211_local *local = sdata->local;
5197 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5198 struct ieee80211_bss *bss = (void *)cbss->priv;
5199 struct sta_info *new_sta = NULL;
5200 struct ieee80211_supported_band *sband;
5201 bool have_sta = false;
5204 sband = local->hw.wiphy->bands[cbss->channel->band];
5206 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
5209 /* If a reconfig is happening, bail out */
5210 if (local->in_reconfig)
5215 have_sta = sta_info_get(sdata, cbss->bssid);
5220 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
5226 * Set up the information for the new channel before setting the
5227 * new channel. We can't - completely race-free - change the basic
5228 * rates bitmap and the channel (sband) that it refers to, but if
5229 * we set it up before we at least avoid calling into the driver's
5230 * bss_info_changed() method with invalid information (since we do
5231 * call that from changing the channel - only for IDLE and perhaps
5232 * some others, but ...).
5234 * So to avoid that, just set up all the new information before the
5235 * channel, but tell the driver to apply it only afterwards, since
5236 * it might need the new channel for that.
5239 u32 rates = 0, basic_rates = 0;
5240 bool have_higher_than_11mbit;
5241 int min_rate = INT_MAX, min_rate_index = -1;
5242 const struct cfg80211_bss_ies *ies;
5243 int shift = ieee80211_vif_get_shift(&sdata->vif);
5245 /* TODO: S1G Basic Rate Set is expressed elsewhere */
5246 if (cbss->channel->band == NL80211_BAND_S1GHZ) {
5247 ieee80211_s1g_sta_rate_init(new_sta);
5251 ieee80211_get_rates(sband, bss->supp_rates,
5252 bss->supp_rates_len,
5253 &rates, &basic_rates,
5254 &have_higher_than_11mbit,
5255 &min_rate, &min_rate_index,
5259 * This used to be a workaround for basic rates missing
5260 * in the association response frame. Now that we no
5261 * longer use the basic rates from there, it probably
5262 * doesn't happen any more, but keep the workaround so
5263 * in case some *other* APs are buggy in different ways
5264 * we can connect -- with a warning.
5265 * Allow this workaround only in case the AP provided at least
5268 if (min_rate_index < 0) {
5270 "No legacy rates in association response\n");
5272 sta_info_free(local, new_sta);
5274 } else if (!basic_rates) {
5276 "No basic rates, using min rate instead\n");
5277 basic_rates = BIT(min_rate_index);
5281 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5284 "No rates found, keeping mandatory only\n");
5286 sdata->vif.bss_conf.basic_rates = basic_rates;
5288 /* cf. IEEE 802.11 9.2.12 */
5289 if (cbss->channel->band == NL80211_BAND_2GHZ &&
5290 have_higher_than_11mbit)
5291 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
5293 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
5296 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
5298 /* set timing information */
5299 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
5301 ies = rcu_dereference(cbss->beacon_ies);
5303 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5304 sdata->vif.bss_conf.sync_device_ts =
5305 bss->device_ts_beacon;
5307 ieee80211_get_dtim(ies,
5308 &sdata->vif.bss_conf.sync_dtim_count,
5310 } else if (!ieee80211_hw_check(&sdata->local->hw,
5311 TIMING_BEACON_ONLY)) {
5312 ies = rcu_dereference(cbss->proberesp_ies);
5313 /* must be non-NULL since beacon IEs were NULL */
5314 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5315 sdata->vif.bss_conf.sync_device_ts =
5316 bss->device_ts_presp;
5317 sdata->vif.bss_conf.sync_dtim_count = 0;
5319 sdata->vif.bss_conf.sync_tsf = 0;
5320 sdata->vif.bss_conf.sync_device_ts = 0;
5321 sdata->vif.bss_conf.sync_dtim_count = 0;
5326 if (new_sta || override) {
5327 err = ieee80211_prep_channel(sdata, cbss);
5330 sta_info_free(local, new_sta);
5337 * tell driver about BSSID, basic rates and timing
5338 * this was set up above, before setting the channel
5340 ieee80211_bss_info_change_notify(sdata,
5341 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5342 BSS_CHANGED_BEACON_INT);
5345 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5347 err = sta_info_insert(new_sta);
5351 "failed to insert STA entry for the AP (error %d)\n",
5356 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5358 /* Cancel scan to ensure that nothing interferes with connection */
5359 if (local->scanning)
5360 ieee80211_scan_cancel(local);
5366 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5367 struct cfg80211_auth_request *req)
5369 struct ieee80211_local *local = sdata->local;
5370 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5371 struct ieee80211_mgd_auth_data *auth_data;
5376 /* prepare auth data structure */
5378 switch (req->auth_type) {
5379 case NL80211_AUTHTYPE_OPEN_SYSTEM:
5380 auth_alg = WLAN_AUTH_OPEN;
5382 case NL80211_AUTHTYPE_SHARED_KEY:
5385 auth_alg = WLAN_AUTH_SHARED_KEY;
5387 case NL80211_AUTHTYPE_FT:
5388 auth_alg = WLAN_AUTH_FT;
5390 case NL80211_AUTHTYPE_NETWORK_EAP:
5391 auth_alg = WLAN_AUTH_LEAP;
5393 case NL80211_AUTHTYPE_SAE:
5394 auth_alg = WLAN_AUTH_SAE;
5396 case NL80211_AUTHTYPE_FILS_SK:
5397 auth_alg = WLAN_AUTH_FILS_SK;
5399 case NL80211_AUTHTYPE_FILS_SK_PFS:
5400 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5402 case NL80211_AUTHTYPE_FILS_PK:
5403 auth_alg = WLAN_AUTH_FILS_PK;
5409 if (ifmgd->assoc_data)
5412 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5413 req->ie_len, GFP_KERNEL);
5417 auth_data->bss = req->bss;
5419 if (req->auth_data_len >= 4) {
5420 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5421 __le16 *pos = (__le16 *) req->auth_data;
5423 auth_data->sae_trans = le16_to_cpu(pos[0]);
5424 auth_data->sae_status = le16_to_cpu(pos[1]);
5426 memcpy(auth_data->data, req->auth_data + 4,
5427 req->auth_data_len - 4);
5428 auth_data->data_len += req->auth_data_len - 4;
5431 /* Check if continuing authentication or trying to authenticate with the
5432 * same BSS that we were in the process of authenticating with and avoid
5433 * removal and re-addition of the STA entry in
5434 * ieee80211_prep_connection().
5436 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5438 if (req->ie && req->ie_len) {
5439 memcpy(&auth_data->data[auth_data->data_len],
5440 req->ie, req->ie_len);
5441 auth_data->data_len += req->ie_len;
5444 if (req->key && req->key_len) {
5445 auth_data->key_len = req->key_len;
5446 auth_data->key_idx = req->key_idx;
5447 memcpy(auth_data->key, req->key, req->key_len);
5450 auth_data->algorithm = auth_alg;
5452 /* try to authenticate/probe */
5454 if (ifmgd->auth_data) {
5455 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5456 auth_data->peer_confirmed =
5457 ifmgd->auth_data->peer_confirmed;
5459 ieee80211_destroy_auth_data(sdata, cont_auth);
5462 /* prep auth_data so we don't go into idle on disassoc */
5463 ifmgd->auth_data = auth_data;
5465 /* If this is continuation of an ongoing SAE authentication exchange
5466 * (i.e., request to send SAE Confirm) and the peer has already
5467 * confirmed, mark authentication completed since we are about to send
5470 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5471 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5472 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5474 if (ifmgd->associated) {
5475 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5478 "disconnect from AP %pM for new auth to %pM\n",
5479 ifmgd->associated->bssid, req->bss->bssid);
5480 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5481 WLAN_REASON_UNSPECIFIED,
5484 ieee80211_report_disconnect(sdata, frame_buf,
5485 sizeof(frame_buf), true,
5486 WLAN_REASON_UNSPECIFIED,
5490 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5492 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5496 err = ieee80211_auth(sdata);
5498 sta_info_destroy_addr(sdata, req->bss->bssid);
5502 /* hold our own reference */
5503 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5507 eth_zero_addr(ifmgd->bssid);
5508 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5509 ifmgd->auth_data = NULL;
5510 mutex_lock(&sdata->local->mtx);
5511 ieee80211_vif_release_channel(sdata);
5512 mutex_unlock(&sdata->local->mtx);
5517 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5518 struct cfg80211_assoc_request *req)
5520 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ;
5521 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ;
5522 struct ieee80211_local *local = sdata->local;
5523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5524 struct ieee80211_bss *bss = (void *)req->bss->priv;
5525 struct ieee80211_mgd_assoc_data *assoc_data;
5526 const struct cfg80211_bss_ies *beacon_ies;
5527 struct ieee80211_supported_band *sband;
5528 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
5529 const u8 *ssidie, *ht_ie, *vht_ie;
5531 bool override = false;
5533 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5538 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5539 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
5544 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5545 assoc_data->ssid_len = ssidie[1];
5546 memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len);
5547 bss_conf->ssid_len = assoc_data->ssid_len;
5550 if (ifmgd->associated) {
5551 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5554 "disconnect from AP %pM for new assoc to %pM\n",
5555 ifmgd->associated->bssid, req->bss->bssid);
5556 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5557 WLAN_REASON_UNSPECIFIED,
5560 ieee80211_report_disconnect(sdata, frame_buf,
5561 sizeof(frame_buf), true,
5562 WLAN_REASON_UNSPECIFIED,
5566 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5571 if (ifmgd->assoc_data) {
5576 if (ifmgd->auth_data) {
5579 /* keep sta info, bssid if matching */
5580 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5581 ieee80211_destroy_auth_data(sdata, match);
5584 /* prepare assoc data */
5586 ifmgd->beacon_crc_valid = false;
5588 assoc_data->wmm = bss->wmm_used &&
5589 (local->hw.queues >= IEEE80211_NUM_ACS);
5592 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5593 * We still associate in non-HT mode (11a/b/g) if any one of these
5594 * ciphers is configured as pairwise.
5595 * We can set this to true for non-11n hardware, that'll be checked
5596 * separately along with the peer capabilities.
5598 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5599 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5600 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5601 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5602 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5603 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5604 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5605 netdev_info(sdata->dev,
5606 "disabling HT/VHT/HE due to WEP/TKIP use\n");
5610 sband = local->hw.wiphy->bands[req->bss->channel->band];
5612 /* also disable HT/VHT/HE if the AP doesn't use WMM */
5613 if (!bss->wmm_used) {
5614 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5615 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5616 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5617 netdev_info(sdata->dev,
5618 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
5621 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5622 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5623 sizeof(ifmgd->ht_capa_mask));
5625 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5626 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5627 sizeof(ifmgd->vht_capa_mask));
5629 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
5630 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
5631 sizeof(ifmgd->s1g_capa_mask));
5633 if (req->ie && req->ie_len) {
5634 memcpy(assoc_data->ie, req->ie, req->ie_len);
5635 assoc_data->ie_len = req->ie_len;
5638 if (req->fils_kek) {
5639 /* should already be checked in cfg80211 - so warn */
5640 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5644 memcpy(assoc_data->fils_kek, req->fils_kek,
5646 assoc_data->fils_kek_len = req->fils_kek_len;
5649 if (req->fils_nonces)
5650 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5651 2 * FILS_NONCE_LEN);
5653 assoc_data->bss = req->bss;
5655 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5656 if (ifmgd->powersave)
5657 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5659 sdata->smps_mode = IEEE80211_SMPS_OFF;
5661 sdata->smps_mode = ifmgd->req_smps;
5663 assoc_data->capability = req->bss->capability;
5664 assoc_data->supp_rates = bss->supp_rates;
5665 assoc_data->supp_rates_len = bss->supp_rates_len;
5668 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5669 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5670 assoc_data->ap_ht_param =
5671 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5673 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5674 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5675 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5676 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5677 sizeof(struct ieee80211_vht_cap));
5679 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT |
5680 IEEE80211_STA_DISABLE_HE;
5683 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5684 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5685 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5686 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5688 if (bss->wmm_used && bss->uapsd_supported &&
5689 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5690 assoc_data->uapsd = true;
5691 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5693 assoc_data->uapsd = false;
5694 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5697 if (req->prev_bssid)
5698 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5701 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5702 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5704 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5705 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5708 if (req->flags & ASSOC_REQ_USE_RRM)
5709 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5711 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5713 if (req->crypto.control_port)
5714 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5716 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5718 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5719 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5720 sdata->control_port_over_nl80211 =
5721 req->crypto.control_port_over_nl80211;
5722 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
5723 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5726 /* kick off associate process */
5728 ifmgd->assoc_data = assoc_data;
5729 ifmgd->dtim_period = 0;
5730 ifmgd->have_beacon = false;
5732 /* override HT/VHT configuration only if the AP and we support it */
5733 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5734 struct ieee80211_sta_ht_cap sta_ht_cap;
5736 if (req->flags & ASSOC_REQ_DISABLE_HT)
5739 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5740 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5742 /* check for 40 MHz disable override */
5743 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5744 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5745 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5748 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5749 req->flags & ASSOC_REQ_DISABLE_VHT)
5753 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5754 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5755 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5756 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5759 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5760 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5762 if (req->flags & ASSOC_REQ_DISABLE_HE)
5763 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5765 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5770 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5772 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5775 * Wait up to one beacon interval ...
5776 * should this be more if we miss one?
5778 sdata_info(sdata, "waiting for beacon from %pM\n",
5780 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5781 assoc_data->timeout_started = true;
5782 assoc_data->need_beacon = true;
5783 } else if (beacon_ies) {
5784 const struct element *elem;
5787 ieee80211_get_dtim(beacon_ies, &dtim_count,
5788 &ifmgd->dtim_period);
5790 ifmgd->have_beacon = true;
5791 assoc_data->timeout = jiffies;
5792 assoc_data->timeout_started = true;
5794 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5795 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5796 sdata->vif.bss_conf.sync_device_ts =
5797 bss->device_ts_beacon;
5798 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5801 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5802 beacon_ies->data, beacon_ies->len);
5803 if (elem && elem->datalen >= 3)
5804 sdata->vif.bss_conf.profile_periodicity = elem->data[2];
5806 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
5807 beacon_ies->data, beacon_ies->len);
5808 if (elem && elem->datalen >= 11 &&
5809 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5810 sdata->vif.bss_conf.ema_ap = true;
5812 assoc_data->timeout = jiffies;
5813 assoc_data->timeout_started = true;
5817 run_again(sdata, assoc_data->timeout);
5819 if (bss->corrupt_data) {
5820 char *corrupt_type = "data";
5821 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5822 if (bss->corrupt_data &
5823 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5824 corrupt_type = "beacon and probe response";
5826 corrupt_type = "beacon";
5827 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5828 corrupt_type = "probe response";
5829 sdata_info(sdata, "associating with AP with corrupt %s\n",
5835 eth_zero_addr(ifmgd->bssid);
5836 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5837 ifmgd->assoc_data = NULL;
5843 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5844 struct cfg80211_deauth_request *req)
5846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5847 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5848 bool tx = !req->local_state_change;
5850 if (ifmgd->auth_data &&
5851 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5853 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5854 req->bssid, req->reason_code,
5855 ieee80211_get_reason_code_string(req->reason_code));
5857 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5858 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5859 IEEE80211_STYPE_DEAUTH,
5860 req->reason_code, tx,
5862 ieee80211_destroy_auth_data(sdata, false);
5863 ieee80211_report_disconnect(sdata, frame_buf,
5864 sizeof(frame_buf), true,
5865 req->reason_code, false);
5870 if (ifmgd->assoc_data &&
5871 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5873 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5874 req->bssid, req->reason_code,
5875 ieee80211_get_reason_code_string(req->reason_code));
5877 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5878 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5879 IEEE80211_STYPE_DEAUTH,
5880 req->reason_code, tx,
5882 ieee80211_destroy_assoc_data(sdata, false, true);
5883 ieee80211_report_disconnect(sdata, frame_buf,
5884 sizeof(frame_buf), true,
5885 req->reason_code, false);
5889 if (ifmgd->associated &&
5890 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5892 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5893 req->bssid, req->reason_code,
5894 ieee80211_get_reason_code_string(req->reason_code));
5896 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5897 req->reason_code, tx, frame_buf);
5898 ieee80211_report_disconnect(sdata, frame_buf,
5899 sizeof(frame_buf), true,
5900 req->reason_code, false);
5907 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5908 struct cfg80211_disassoc_request *req)
5910 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5912 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5915 * cfg80211 should catch this ... but it's racy since
5916 * we can receive a disassoc frame, process it, hand it
5917 * to cfg80211 while that's in a locked section already
5918 * trying to tell us that the user wants to disconnect.
5920 if (ifmgd->associated != req->bss)
5924 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5925 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5927 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5928 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5929 req->reason_code, !req->local_state_change,
5932 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5933 req->reason_code, false);
5938 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5943 * Make sure some work items will not run after this,
5944 * they will not do anything but might not have been
5945 * cancelled when disconnecting.
5947 cancel_work_sync(&ifmgd->monitor_work);
5948 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5949 cancel_work_sync(&ifmgd->request_smps_work);
5950 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5951 cancel_work_sync(&ifmgd->chswitch_work);
5952 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5955 if (ifmgd->assoc_data) {
5956 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5957 ieee80211_destroy_assoc_data(sdata, false, false);
5958 cfg80211_assoc_timeout(sdata->dev, bss);
5960 if (ifmgd->auth_data)
5961 ieee80211_destroy_auth_data(sdata, false);
5962 spin_lock_bh(&ifmgd->teardown_lock);
5963 if (ifmgd->teardown_skb) {
5964 kfree_skb(ifmgd->teardown_skb);
5965 ifmgd->teardown_skb = NULL;
5966 ifmgd->orig_teardown_skb = NULL;
5968 kfree(ifmgd->assoc_req_ies);
5969 ifmgd->assoc_req_ies = NULL;
5970 ifmgd->assoc_req_ies_len = 0;
5971 spin_unlock_bh(&ifmgd->teardown_lock);
5972 del_timer_sync(&ifmgd->timer);
5973 sdata_unlock(sdata);
5976 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5977 enum nl80211_cqm_rssi_threshold_event rssi_event,
5981 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5983 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5985 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5987 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5989 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5991 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5993 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5995 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5997 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);