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 struct cfg80211_chan_def *chandef, bool tracking)
154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
155 struct cfg80211_chan_def vht_chandef;
156 struct ieee80211_sta_ht_cap sta_ht_cap;
159 memset(chandef, 0, sizeof(struct cfg80211_chan_def));
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->freq1_offset = channel->freq_offset;
165 if (channel->band == NL80211_BAND_6GHZ) {
166 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef))
167 ret = IEEE80211_STA_DISABLE_HT |
168 IEEE80211_STA_DISABLE_VHT |
169 IEEE80211_STA_DISABLE_HE;
170 vht_chandef = *chandef;
174 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
175 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
177 if (!ht_oper || !sta_ht_cap.ht_supported) {
178 ret = IEEE80211_STA_DISABLE_HT |
179 IEEE80211_STA_DISABLE_VHT |
180 IEEE80211_STA_DISABLE_HE;
184 chandef->width = NL80211_CHAN_WIDTH_20;
186 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
188 /* check that channel matches the right operating channel */
189 if (!tracking && channel->center_freq != ht_cfreq) {
191 * It's possible that some APs are confused here;
192 * Netgear WNDR3700 sometimes reports 4 higher than
193 * the actual channel in association responses, but
194 * since we look at probe response/beacon data here
198 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
199 channel->center_freq, ht_cfreq,
200 ht_oper->primary_chan, channel->band);
201 ret = IEEE80211_STA_DISABLE_HT |
202 IEEE80211_STA_DISABLE_VHT |
203 IEEE80211_STA_DISABLE_HE;
207 /* check 40 MHz support, if we have it */
208 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
209 ieee80211_chandef_ht_oper(ht_oper, chandef);
211 /* 40 MHz (and 80 MHz) must be supported for VHT */
212 ret = IEEE80211_STA_DISABLE_VHT;
213 /* also mark 40 MHz disabled */
214 ret |= IEEE80211_STA_DISABLE_40MHZ;
218 if (!vht_oper || !sband->vht_cap.vht_supported) {
219 ret = IEEE80211_STA_DISABLE_VHT;
223 vht_chandef = *chandef;
224 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
225 (le32_to_cpu(he_oper->he_oper_params) &
226 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
227 struct ieee80211_vht_operation he_oper_vht_cap;
230 * Set only first 3 bytes (other 2 aren't used in
231 * ieee80211_chandef_vht_oper() anyway)
233 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
234 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
236 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
237 &he_oper_vht_cap, ht_oper,
239 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
241 "HE AP VHT information is invalid, disable HE\n");
242 ret = IEEE80211_STA_DISABLE_HE;
245 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
251 "AP VHT information is invalid, disable VHT\n");
252 ret = IEEE80211_STA_DISABLE_VHT;
256 if (!cfg80211_chandef_valid(&vht_chandef)) {
257 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
259 "AP VHT information is invalid, disable VHT\n");
260 ret = IEEE80211_STA_DISABLE_VHT;
264 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
269 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
270 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
272 "AP VHT information doesn't match HT, disable VHT\n");
273 ret = IEEE80211_STA_DISABLE_VHT;
277 *chandef = vht_chandef;
283 * When tracking the current AP, don't do any further checks if the
284 * new chandef is identical to the one we're currently using for the
285 * connection. This keeps us from playing ping-pong with regulatory,
286 * without it the following can happen (for example):
287 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
288 * - AP advertises regdom US
289 * - CRDA loads regdom US with 80 MHz prohibited (old database)
290 * - the code below detects an unsupported channel, downgrades, and
291 * we disconnect from the AP in the caller
292 * - disconnect causes CRDA to reload world regdomain and the game
294 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 * It seems possible that there are still scenarios with CSA or real
297 * bandwidth changes where a this could happen, but those cases are
298 * less common and wouldn't completely prevent using the AP.
301 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
304 /* don't print the message below for VHT mismatch if VHT is disabled */
305 if (ret & IEEE80211_STA_DISABLE_VHT)
306 vht_chandef = *chandef;
309 * Ignore the DISABLED flag when we're already connected and only
310 * tracking the APs beacon for bandwidth changes - otherwise we
311 * might get disconnected here if we connect to an AP, update our
312 * regulatory information based on the AP's country IE and the
313 * information we have is wrong/outdated and disables the channel
314 * that we're actually using for the connection to the AP.
316 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
318 IEEE80211_CHAN_DISABLED)) {
319 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
320 ret = IEEE80211_STA_DISABLE_HT |
321 IEEE80211_STA_DISABLE_VHT |
322 IEEE80211_STA_DISABLE_HE;
326 ret |= ieee80211_chandef_downgrade(chandef);
329 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
330 IEEE80211_CHAN_NO_HE))
331 ret |= IEEE80211_STA_DISABLE_HE;
333 if (chandef->width != vht_chandef.width && !tracking)
335 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
337 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
341 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
342 struct sta_info *sta,
343 const struct ieee80211_ht_cap *ht_cap,
344 const struct ieee80211_vht_cap *vht_cap,
345 const struct ieee80211_ht_operation *ht_oper,
346 const struct ieee80211_vht_operation *vht_oper,
347 const struct ieee80211_he_operation *he_oper,
348 const u8 *bssid, u32 *changed)
350 struct ieee80211_local *local = sdata->local;
351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
352 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
353 struct ieee80211_supported_band *sband =
354 local->hw.wiphy->bands[chan->band];
355 struct cfg80211_chan_def chandef;
358 enum ieee80211_sta_rx_bandwidth new_sta_bw;
359 u32 vht_cap_info = 0;
362 /* if HT was/is disabled, don't track any bandwidth changes */
363 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
366 /* don't check VHT if we associated as non-VHT station */
367 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
370 /* don't check HE if we associated as non-HE station */
371 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
372 !ieee80211_get_he_sta_cap(sband))
375 if (WARN_ON_ONCE(!sta))
379 * if bss configuration changed store the new one -
380 * this may be applicable even if channel is identical
382 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
383 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
384 *changed |= BSS_CHANGED_HT;
385 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
389 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
391 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
392 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info,
393 ht_oper, vht_oper, he_oper,
397 * Downgrade the new channel if we associated with restricted
398 * capabilities. For example, if we associated as a 20 MHz STA
399 * to a 40 MHz AP (due to regulatory, capabilities or config
400 * reasons) then switching to a 40 MHz channel now won't do us
401 * any good -- we couldn't use it with the AP.
403 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
404 chandef.width == NL80211_CHAN_WIDTH_80P80)
405 flags |= ieee80211_chandef_downgrade(&chandef);
406 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
407 chandef.width == NL80211_CHAN_WIDTH_160)
408 flags |= ieee80211_chandef_downgrade(&chandef);
409 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
410 chandef.width > NL80211_CHAN_WIDTH_20)
411 flags |= ieee80211_chandef_downgrade(&chandef);
413 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
417 "AP %pM changed bandwidth, new config is %d.%03d MHz, "
418 "width %d (%d.%03d/%d MHz)\n",
419 ifmgd->bssid, chandef.chan->center_freq,
420 chandef.chan->freq_offset, chandef.width,
421 chandef.center_freq1, chandef.freq1_offset,
422 chandef.center_freq2);
424 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
425 IEEE80211_STA_DISABLE_VHT |
426 IEEE80211_STA_DISABLE_HE |
427 IEEE80211_STA_DISABLE_40MHZ |
428 IEEE80211_STA_DISABLE_80P80MHZ |
429 IEEE80211_STA_DISABLE_160MHZ)) ||
430 !cfg80211_chandef_valid(&chandef)) {
432 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
437 switch (chandef.width) {
438 case NL80211_CHAN_WIDTH_20_NOHT:
439 case NL80211_CHAN_WIDTH_20:
440 new_sta_bw = IEEE80211_STA_RX_BW_20;
442 case NL80211_CHAN_WIDTH_40:
443 new_sta_bw = IEEE80211_STA_RX_BW_40;
445 case NL80211_CHAN_WIDTH_80:
446 new_sta_bw = IEEE80211_STA_RX_BW_80;
448 case NL80211_CHAN_WIDTH_80P80:
449 case NL80211_CHAN_WIDTH_160:
450 new_sta_bw = IEEE80211_STA_RX_BW_160;
456 if (new_sta_bw > sta->cur_max_bandwidth)
457 new_sta_bw = sta->cur_max_bandwidth;
459 if (new_sta_bw < sta->sta.bandwidth) {
460 sta->sta.bandwidth = new_sta_bw;
461 rate_control_rate_update(local, sband, sta,
462 IEEE80211_RC_BW_CHANGED);
465 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
468 "AP %pM changed bandwidth to incompatible one - disconnect\n",
473 if (new_sta_bw > sta->sta.bandwidth) {
474 sta->sta.bandwidth = new_sta_bw;
475 rate_control_rate_update(local, sband, sta,
476 IEEE80211_RC_BW_CHANGED);
482 /* frame sending functions */
484 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
485 struct sk_buff *skb, u8 ap_ht_param,
486 struct ieee80211_supported_band *sband,
487 struct ieee80211_channel *channel,
488 enum ieee80211_smps_mode smps)
491 u32 flags = channel->flags;
493 struct ieee80211_sta_ht_cap ht_cap;
495 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
497 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
498 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
500 /* determine capability flags */
503 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
504 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
505 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
506 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
507 cap &= ~IEEE80211_HT_CAP_SGI_40;
510 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
511 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
512 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
513 cap &= ~IEEE80211_HT_CAP_SGI_40;
519 * If 40 MHz was disabled associate as though we weren't
520 * capable of 40 MHz -- some broken APs will never fall
521 * back to trying to transmit in 20 MHz.
523 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
524 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
525 cap &= ~IEEE80211_HT_CAP_SGI_40;
528 /* set SM PS mode properly */
529 cap &= ~IEEE80211_HT_CAP_SM_PS;
531 case IEEE80211_SMPS_AUTOMATIC:
532 case IEEE80211_SMPS_NUM_MODES:
535 case IEEE80211_SMPS_OFF:
536 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
537 IEEE80211_HT_CAP_SM_PS_SHIFT;
539 case IEEE80211_SMPS_STATIC:
540 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
541 IEEE80211_HT_CAP_SM_PS_SHIFT;
543 case IEEE80211_SMPS_DYNAMIC:
544 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
545 IEEE80211_HT_CAP_SM_PS_SHIFT;
549 /* reserve and fill IE */
550 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
551 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
554 /* This function determines vht capability flags for the association
556 * Note - the function may set the owner of the MU-MIMO capability
558 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
560 struct ieee80211_supported_band *sband,
561 struct ieee80211_vht_cap *ap_vht_cap)
563 struct ieee80211_local *local = sdata->local;
566 struct ieee80211_sta_vht_cap vht_cap;
567 u32 mask, ap_bf_sts, our_bf_sts;
569 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
571 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
572 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
574 /* determine capability flags */
577 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
578 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
580 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
581 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
582 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
583 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
586 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
587 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
588 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
592 * Some APs apparently get confused if our capabilities are better
593 * than theirs, so restrict what we advertise in the assoc request.
595 if (!(ap_vht_cap->vht_cap_info &
596 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
597 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
598 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
599 else if (!(ap_vht_cap->vht_cap_info &
600 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
601 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
604 * If some other vif is using the MU-MIMO capablity we cannot associate
605 * using MU-MIMO - this will lead to contradictions in the group-id
607 * Ownership is defined since association request, in order to avoid
608 * simultaneous associations with MU-MIMO.
610 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
611 bool disable_mu_mimo = false;
612 struct ieee80211_sub_if_data *other;
614 list_for_each_entry_rcu(other, &local->interfaces, list) {
615 if (other->vif.mu_mimo_owner) {
616 disable_mu_mimo = true;
621 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
623 sdata->vif.mu_mimo_owner = true;
626 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
628 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
629 our_bf_sts = cap & mask;
631 if (ap_bf_sts < our_bf_sts) {
636 /* reserve and fill IE */
637 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
638 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
641 /* This function determines HE capability flags for the association
644 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
646 struct ieee80211_supported_band *sband)
649 const struct ieee80211_sta_he_cap *he_cap = NULL;
650 struct ieee80211_chanctx_conf *chanctx_conf;
652 bool reg_cap = false;
655 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
656 if (!WARN_ON_ONCE(!chanctx_conf))
657 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
659 IEEE80211_CHAN_NO_HE);
663 he_cap = ieee80211_get_he_sta_cap(sband);
664 if (!he_cap || !reg_cap)
668 * TODO: the 1 added is because this temporarily is under the EXTENSION
669 * IE. Get rid of it when it moves.
672 2 + 1 + sizeof(he_cap->he_cap_elem) +
673 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
674 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
675 he_cap->he_cap_elem.phy_cap_info);
676 pos = skb_put(skb, he_cap_size);
677 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
679 ieee80211_ie_build_he_6ghz_cap(sdata, skb);
682 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
684 struct ieee80211_local *local = sdata->local;
685 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
686 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
688 struct ieee80211_mgmt *mgmt;
689 u8 *pos, qos_info, *ie_start;
690 size_t offset = 0, noffset;
691 int i, count, rates_len, supp_rates_len, shift;
693 struct ieee80211_supported_band *sband;
694 struct ieee80211_chanctx_conf *chanctx_conf;
695 struct ieee80211_channel *chan;
697 struct element *ext_capa = NULL;
699 /* we know it's writable, cast away the const */
700 if (assoc_data->ie_len)
701 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
705 sdata_assert_lock(sdata);
708 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
709 if (WARN_ON(!chanctx_conf)) {
713 chan = chanctx_conf->def.chan;
715 sband = local->hw.wiphy->bands[chan->band];
716 shift = ieee80211_vif_get_shift(&sdata->vif);
718 if (assoc_data->supp_rates_len) {
720 * Get all rates supported by the device and the AP as
721 * some APs don't like getting a superset of their rates
722 * in the association request (e.g. D-Link DAP 1353 in
725 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
726 assoc_data->supp_rates,
727 assoc_data->supp_rates_len,
731 * In case AP not provide any supported rates information
732 * before association, we send information element(s) with
733 * all rates that we support.
736 for (i = 0; i < sband->n_bitrates; i++) {
742 skb = alloc_skb(local->hw.extra_tx_headroom +
743 sizeof(*mgmt) + /* bit too much but doesn't matter */
744 2 + assoc_data->ssid_len + /* SSID */
745 4 + rates_len + /* (extended) rates */
746 4 + /* power capability */
747 2 + 2 * sband->n_channels + /* supported channels */
748 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
749 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
750 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
751 sizeof(struct ieee80211_he_mcs_nss_supp) +
752 IEEE80211_HE_PPE_THRES_MAX_LEN +
753 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
754 assoc_data->ie_len + /* extra IEs */
755 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
761 skb_reserve(skb, local->hw.extra_tx_headroom);
763 capab = WLAN_CAPABILITY_ESS;
765 if (sband->band == NL80211_BAND_2GHZ) {
766 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
767 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
770 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
771 capab |= WLAN_CAPABILITY_PRIVACY;
773 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
774 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
775 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
777 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
778 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
780 mgmt = skb_put_zero(skb, 24);
781 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
782 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
783 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
785 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
787 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
788 IEEE80211_STYPE_REASSOC_REQ);
789 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
790 mgmt->u.reassoc_req.listen_interval =
791 cpu_to_le16(local->hw.conf.listen_interval);
792 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
796 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
797 IEEE80211_STYPE_ASSOC_REQ);
798 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
799 mgmt->u.assoc_req.listen_interval =
800 cpu_to_le16(local->hw.conf.listen_interval);
804 pos = skb_put(skb, 2 + assoc_data->ssid_len);
806 *pos++ = WLAN_EID_SSID;
807 *pos++ = assoc_data->ssid_len;
808 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
810 /* add all rates which were marked to be used above */
811 supp_rates_len = rates_len;
812 if (supp_rates_len > 8)
815 pos = skb_put(skb, supp_rates_len + 2);
816 *pos++ = WLAN_EID_SUPP_RATES;
817 *pos++ = supp_rates_len;
820 for (i = 0; i < sband->n_bitrates; i++) {
821 if (BIT(i) & rates) {
822 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
830 if (rates_len > count) {
831 pos = skb_put(skb, rates_len - count + 2);
832 *pos++ = WLAN_EID_EXT_SUPP_RATES;
833 *pos++ = rates_len - count;
835 for (i++; i < sband->n_bitrates; i++) {
836 if (BIT(i) & rates) {
838 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
845 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
846 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
847 pos = skb_put(skb, 4);
848 *pos++ = WLAN_EID_PWR_CAPABILITY;
850 *pos++ = 0; /* min tx power */
852 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
856 * Per spec, we shouldn't include the list of channels if we advertise
857 * support for extended channel switching, but we've always done that;
858 * (for now?) apply this restriction only on the (new) 6 GHz band.
860 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
861 (sband->band != NL80211_BAND_6GHZ ||
862 !ext_capa || ext_capa->datalen < 1 ||
863 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
864 /* TODO: get this in reg domain format */
865 pos = skb_put(skb, 2 * sband->n_channels + 2);
866 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
867 *pos++ = 2 * sband->n_channels;
868 for (i = 0; i < sband->n_channels; i++) {
869 *pos++ = ieee80211_frequency_to_channel(
870 sband->channels[i].center_freq);
871 *pos++ = 1; /* one channel in the subband*/
875 /* Set MBSSID support for HE AP if needed */
876 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
877 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len &&
878 ext_capa && ext_capa->datalen >= 3)
879 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
881 /* if present, add any custom IEs that go before HT */
882 if (assoc_data->ie_len) {
883 static const u8 before_ht[] = {
886 WLAN_EID_EXT_SUPP_RATES,
887 WLAN_EID_PWR_CAPABILITY,
888 WLAN_EID_SUPPORTED_CHANNELS,
891 WLAN_EID_RRM_ENABLED_CAPABILITIES,
892 WLAN_EID_MOBILITY_DOMAIN,
893 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
894 WLAN_EID_RIC_DATA, /* reassoc only */
895 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
897 static const u8 after_ric[] = {
898 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
899 WLAN_EID_HT_CAPABILITY,
900 WLAN_EID_BSS_COEX_2040,
901 /* luckily this is almost always there */
902 WLAN_EID_EXT_CAPABILITY,
903 WLAN_EID_QOS_TRAFFIC_CAPA,
904 WLAN_EID_TIM_BCAST_REQ,
905 WLAN_EID_INTERWORKING,
906 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
907 WLAN_EID_VHT_CAPABILITY,
908 WLAN_EID_OPMODE_NOTIF,
911 noffset = ieee80211_ie_split_ric(assoc_data->ie,
914 ARRAY_SIZE(before_ht),
916 ARRAY_SIZE(after_ric),
918 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
922 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
923 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
924 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
926 if (sband->band != NL80211_BAND_6GHZ &&
927 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
928 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
929 sband, chan, sdata->smps_mode);
931 /* if present, add any custom IEs that go before VHT */
932 if (assoc_data->ie_len) {
933 static const u8 before_vht[] = {
935 * no need to list the ones split off before HT
938 WLAN_EID_BSS_COEX_2040,
939 WLAN_EID_EXT_CAPABILITY,
940 WLAN_EID_QOS_TRAFFIC_CAPA,
941 WLAN_EID_TIM_BCAST_REQ,
942 WLAN_EID_INTERWORKING,
943 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
946 /* RIC already taken above, so no need to handle here anymore */
947 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
948 before_vht, ARRAY_SIZE(before_vht),
950 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
954 /* if present, add any custom IEs that go before HE */
955 if (assoc_data->ie_len) {
956 static const u8 before_he[] = {
958 * no need to list the ones split off before VHT
961 WLAN_EID_OPMODE_NOTIF,
962 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
964 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
965 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
966 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
967 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
968 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
969 /* TODO: add 11ah/11aj/11ak elements */
972 /* RIC already taken above, so no need to handle here anymore */
973 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
974 before_he, ARRAY_SIZE(before_he),
976 pos = skb_put(skb, noffset - offset);
977 memcpy(pos, assoc_data->ie + offset, noffset - offset);
981 if (sband->band != NL80211_BAND_6GHZ &&
982 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
983 ieee80211_add_vht_ie(sdata, skb, sband,
984 &assoc_data->ap_vht_cap);
987 * If AP doesn't support HT, mark HE as disabled.
988 * If on the 5GHz band, make sure it supports VHT.
990 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
991 (sband->band == NL80211_BAND_5GHZ &&
992 ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
993 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
995 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
996 ieee80211_add_he_ie(sdata, skb, sband);
998 /* if present, add any custom non-vendor IEs that go after HE */
999 if (assoc_data->ie_len) {
1000 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1003 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1007 if (assoc_data->wmm) {
1008 if (assoc_data->uapsd) {
1009 qos_info = ifmgd->uapsd_queues;
1010 qos_info |= (ifmgd->uapsd_max_sp_len <<
1011 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1016 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1019 /* add any remaining custom (i.e. vendor specific here) IEs */
1020 if (assoc_data->ie_len) {
1021 noffset = assoc_data->ie_len;
1022 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1025 if (assoc_data->fils_kek_len &&
1026 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
1031 pos = skb_tail_pointer(skb);
1032 kfree(ifmgd->assoc_req_ies);
1033 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1034 ifmgd->assoc_req_ies_len = pos - ie_start;
1036 drv_mgd_prepare_tx(local, sdata, 0);
1038 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1039 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1040 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1041 IEEE80211_TX_INTFL_MLME_CONN_TX;
1042 ieee80211_tx_skb(sdata, skb);
1045 void ieee80211_send_pspoll(struct ieee80211_local *local,
1046 struct ieee80211_sub_if_data *sdata)
1048 struct ieee80211_pspoll *pspoll;
1049 struct sk_buff *skb;
1051 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1055 pspoll = (struct ieee80211_pspoll *) skb->data;
1056 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1058 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1059 ieee80211_tx_skb(sdata, skb);
1062 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1063 struct ieee80211_sub_if_data *sdata,
1066 struct sk_buff *skb;
1067 struct ieee80211_hdr_3addr *nullfunc;
1068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1070 /* Don't send NDPs when STA is connected HE */
1071 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1072 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1075 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1076 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1080 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1082 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1084 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1085 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1087 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1088 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1090 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1091 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1093 ieee80211_tx_skb(sdata, skb);
1096 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1097 struct ieee80211_sub_if_data *sdata)
1099 struct sk_buff *skb;
1100 struct ieee80211_hdr *nullfunc;
1103 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1106 /* Don't send NDPs when connected HE */
1107 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1110 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1114 skb_reserve(skb, local->hw.extra_tx_headroom);
1116 nullfunc = skb_put_zero(skb, 30);
1117 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1118 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1119 nullfunc->frame_control = fc;
1120 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1121 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1122 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1123 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1125 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1126 ieee80211_tx_skb(sdata, skb);
1129 /* spectrum management related things */
1130 static void ieee80211_chswitch_work(struct work_struct *work)
1132 struct ieee80211_sub_if_data *sdata =
1133 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1134 struct ieee80211_local *local = sdata->local;
1135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1138 if (!ieee80211_sdata_running(sdata))
1142 mutex_lock(&local->mtx);
1143 mutex_lock(&local->chanctx_mtx);
1145 if (!ifmgd->associated)
1148 if (!sdata->vif.csa_active)
1152 * using reservation isn't immediate as it may be deferred until later
1153 * with multi-vif. once reservation is complete it will re-schedule the
1154 * work with no reserved_chanctx so verify chandef to check if it
1155 * completed successfully
1158 if (sdata->reserved_chanctx) {
1159 struct ieee80211_supported_band *sband = NULL;
1160 struct sta_info *mgd_sta = NULL;
1161 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1164 * with multi-vif csa driver may call ieee80211_csa_finish()
1165 * many times while waiting for other interfaces to use their
1168 if (sdata->reserved_ready)
1171 if (sdata->vif.bss_conf.chandef.width !=
1172 sdata->csa_chandef.width) {
1174 * For managed interface, we need to also update the AP
1175 * station bandwidth and align the rate scale algorithm
1176 * on the bandwidth change. Here we only consider the
1177 * bandwidth of the new channel definition (as channel
1178 * switch flow does not have the full HT/VHT/HE
1179 * information), assuming that if additional changes are
1180 * required they would be done as part of the processing
1181 * of the next beacon from the AP.
1183 switch (sdata->csa_chandef.width) {
1184 case NL80211_CHAN_WIDTH_20_NOHT:
1185 case NL80211_CHAN_WIDTH_20:
1187 bw = IEEE80211_STA_RX_BW_20;
1189 case NL80211_CHAN_WIDTH_40:
1190 bw = IEEE80211_STA_RX_BW_40;
1192 case NL80211_CHAN_WIDTH_80:
1193 bw = IEEE80211_STA_RX_BW_80;
1195 case NL80211_CHAN_WIDTH_80P80:
1196 case NL80211_CHAN_WIDTH_160:
1197 bw = IEEE80211_STA_RX_BW_160;
1201 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1203 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1206 if (sdata->vif.bss_conf.chandef.width >
1207 sdata->csa_chandef.width) {
1208 mgd_sta->sta.bandwidth = bw;
1209 rate_control_rate_update(local, sband, mgd_sta,
1210 IEEE80211_RC_BW_CHANGED);
1213 ret = ieee80211_vif_use_reserved_context(sdata);
1216 "failed to use reserved channel context, disconnecting (err=%d)\n",
1218 ieee80211_queue_work(&sdata->local->hw,
1219 &ifmgd->csa_connection_drop_work);
1223 if (sdata->vif.bss_conf.chandef.width <
1224 sdata->csa_chandef.width) {
1225 mgd_sta->sta.bandwidth = bw;
1226 rate_control_rate_update(local, sband, mgd_sta,
1227 IEEE80211_RC_BW_CHANGED);
1233 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1234 &sdata->csa_chandef)) {
1236 "failed to finalize channel switch, disconnecting\n");
1237 ieee80211_queue_work(&sdata->local->hw,
1238 &ifmgd->csa_connection_drop_work);
1242 ifmgd->csa_waiting_bcn = true;
1244 ieee80211_sta_reset_beacon_monitor(sdata);
1245 ieee80211_sta_reset_conn_monitor(sdata);
1248 mutex_unlock(&local->chanctx_mtx);
1249 mutex_unlock(&local->mtx);
1250 sdata_unlock(sdata);
1253 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1255 struct ieee80211_local *local = sdata->local;
1256 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1259 sdata_assert_lock(sdata);
1261 WARN_ON(!sdata->vif.csa_active);
1263 if (sdata->csa_block_tx) {
1264 ieee80211_wake_vif_queues(local, sdata,
1265 IEEE80211_QUEUE_STOP_REASON_CSA);
1266 sdata->csa_block_tx = false;
1269 sdata->vif.csa_active = false;
1270 ifmgd->csa_waiting_bcn = false;
1272 ret = drv_post_channel_switch(sdata);
1275 "driver post channel switch failed, disconnecting\n");
1276 ieee80211_queue_work(&local->hw,
1277 &ifmgd->csa_connection_drop_work);
1281 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1284 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1286 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1289 trace_api_chswitch_done(sdata, success);
1292 "driver channel switch failed, disconnecting\n");
1293 ieee80211_queue_work(&sdata->local->hw,
1294 &ifmgd->csa_connection_drop_work);
1296 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1299 EXPORT_SYMBOL(ieee80211_chswitch_done);
1301 static void ieee80211_chswitch_timer(struct timer_list *t)
1303 struct ieee80211_sub_if_data *sdata =
1304 from_timer(sdata, t, u.mgd.chswitch_timer);
1306 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1310 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1312 struct ieee80211_local *local = sdata->local;
1314 if (!local->ops->abort_channel_switch)
1317 mutex_lock(&local->mtx);
1319 mutex_lock(&local->chanctx_mtx);
1320 ieee80211_vif_unreserve_chanctx(sdata);
1321 mutex_unlock(&local->chanctx_mtx);
1323 if (sdata->csa_block_tx)
1324 ieee80211_wake_vif_queues(local, sdata,
1325 IEEE80211_QUEUE_STOP_REASON_CSA);
1327 sdata->csa_block_tx = false;
1328 sdata->vif.csa_active = false;
1330 mutex_unlock(&local->mtx);
1332 drv_abort_channel_switch(sdata);
1336 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1337 u64 timestamp, u32 device_timestamp,
1338 struct ieee802_11_elems *elems,
1341 struct ieee80211_local *local = sdata->local;
1342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1343 struct cfg80211_bss *cbss = ifmgd->associated;
1344 struct ieee80211_chanctx_conf *conf;
1345 struct ieee80211_chanctx *chanctx;
1346 enum nl80211_band current_band;
1347 struct ieee80211_csa_ie csa_ie;
1348 struct ieee80211_channel_switch ch_switch;
1349 struct ieee80211_bss *bss;
1352 sdata_assert_lock(sdata);
1357 if (local->scanning)
1360 current_band = cbss->channel->band;
1361 bss = (void *)cbss->priv;
1362 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1365 ifmgd->associated->bssid, &csa_ie);
1368 ch_switch.timestamp = timestamp;
1369 ch_switch.device_timestamp = device_timestamp;
1370 ch_switch.block_tx = csa_ie.mode;
1371 ch_switch.chandef = csa_ie.chandef;
1372 ch_switch.count = csa_ie.count;
1373 ch_switch.delay = csa_ie.max_switch_time;
1377 ieee80211_queue_work(&local->hw,
1378 &ifmgd->csa_connection_drop_work);
1382 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1384 ieee80211_sta_abort_chanswitch(sdata);
1386 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1388 } else if (sdata->vif.csa_active || res) {
1389 /* disregard subsequent announcements if already processing */
1393 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1394 IEEE80211_CHAN_DISABLED)) {
1396 "AP %pM switches to unsupported channel "
1397 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1399 ifmgd->associated->bssid,
1400 csa_ie.chandef.chan->center_freq,
1401 csa_ie.chandef.chan->freq_offset,
1402 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1403 csa_ie.chandef.freq1_offset,
1404 csa_ie.chandef.center_freq2);
1405 ieee80211_queue_work(&local->hw,
1406 &ifmgd->csa_connection_drop_work);
1410 if (cfg80211_chandef_identical(&csa_ie.chandef,
1411 &sdata->vif.bss_conf.chandef) &&
1412 (!csa_ie.mode || !beacon)) {
1413 if (ifmgd->csa_ignored_same_chan)
1416 "AP %pM tries to chanswitch to same channel, ignore\n",
1417 ifmgd->associated->bssid);
1418 ifmgd->csa_ignored_same_chan = true;
1423 * Drop all TDLS peers - either we disconnect or move to a different
1424 * channel from this point on. There's no telling what our peer will do.
1425 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1426 * have an incompatible wider chandef.
1428 ieee80211_teardown_tdls_peers(sdata);
1430 mutex_lock(&local->mtx);
1431 mutex_lock(&local->chanctx_mtx);
1432 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1433 lockdep_is_held(&local->chanctx_mtx));
1436 "no channel context assigned to vif?, disconnecting\n");
1437 goto drop_connection;
1440 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1442 if (local->use_chanctx &&
1443 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1445 "driver doesn't support chan-switch with channel contexts\n");
1446 goto drop_connection;
1449 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1451 "preparing for channel switch failed, disconnecting\n");
1452 goto drop_connection;
1455 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1456 chanctx->mode, false);
1459 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1461 goto drop_connection;
1463 mutex_unlock(&local->chanctx_mtx);
1465 sdata->vif.csa_active = true;
1466 sdata->csa_chandef = csa_ie.chandef;
1467 sdata->csa_block_tx = csa_ie.mode;
1468 ifmgd->csa_ignored_same_chan = false;
1470 if (sdata->csa_block_tx)
1471 ieee80211_stop_vif_queues(local, sdata,
1472 IEEE80211_QUEUE_STOP_REASON_CSA);
1473 mutex_unlock(&local->mtx);
1475 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1478 if (local->ops->channel_switch) {
1479 /* use driver's channel switch callback */
1480 drv_channel_switch(local, sdata, &ch_switch);
1484 /* channel switch handled in software */
1485 if (csa_ie.count <= 1)
1486 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1488 mod_timer(&ifmgd->chswitch_timer,
1489 TU_TO_EXP_TIME((csa_ie.count - 1) *
1490 cbss->beacon_interval));
1494 * This is just so that the disconnect flow will know that
1495 * we were trying to switch channel and failed. In case the
1496 * mode is 1 (we are not allowed to Tx), we will know not to
1497 * send a deauthentication frame. Those two fields will be
1498 * reset when the disconnection worker runs.
1500 sdata->vif.csa_active = true;
1501 sdata->csa_block_tx = csa_ie.mode;
1503 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1504 mutex_unlock(&local->chanctx_mtx);
1505 mutex_unlock(&local->mtx);
1509 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1510 struct ieee80211_channel *channel,
1511 const u8 *country_ie, u8 country_ie_len,
1512 const u8 *pwr_constr_elem,
1513 int *chan_pwr, int *pwr_reduction)
1515 struct ieee80211_country_ie_triplet *triplet;
1516 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1517 int i, chan_increment;
1518 bool have_chan_pwr = false;
1521 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1524 triplet = (void *)(country_ie + 3);
1525 country_ie_len -= 3;
1527 switch (channel->band) {
1531 case NL80211_BAND_2GHZ:
1532 case NL80211_BAND_60GHZ:
1535 case NL80211_BAND_5GHZ:
1536 case NL80211_BAND_6GHZ:
1542 while (country_ie_len >= 3) {
1543 u8 first_channel = triplet->chans.first_channel;
1545 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1548 for (i = 0; i < triplet->chans.num_channels; i++) {
1549 if (first_channel + i * chan_increment == chan) {
1550 have_chan_pwr = true;
1551 *chan_pwr = triplet->chans.max_power;
1560 country_ie_len -= 3;
1563 if (have_chan_pwr && pwr_constr_elem)
1564 *pwr_reduction = *pwr_constr_elem;
1568 return have_chan_pwr;
1571 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1572 struct ieee80211_channel *channel,
1573 const u8 *cisco_dtpc_ie,
1576 /* From practical testing, the first data byte of the DTPC element
1577 * seems to contain the requested dBm level, and the CLI on Cisco
1578 * APs clearly state the range is -127 to 127 dBm, which indicates
1579 * a signed byte, although it seemingly never actually goes negative.
1580 * The other byte seems to always be zero.
1582 *pwr_level = (__s8)cisco_dtpc_ie[4];
1585 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1586 struct ieee80211_channel *channel,
1587 struct ieee80211_mgmt *mgmt,
1588 const u8 *country_ie, u8 country_ie_len,
1589 const u8 *pwr_constr_ie,
1590 const u8 *cisco_dtpc_ie)
1592 bool has_80211h_pwr = false, has_cisco_pwr = false;
1593 int chan_pwr = 0, pwr_reduction_80211h = 0;
1594 int pwr_level_cisco, pwr_level_80211h;
1596 __le16 capab = mgmt->u.probe_resp.capab_info;
1599 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1600 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1601 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1602 sdata, channel, country_ie, country_ie_len,
1603 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1605 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1608 if (cisco_dtpc_ie) {
1609 ieee80211_find_cisco_dtpc(
1610 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1611 has_cisco_pwr = true;
1614 if (!has_80211h_pwr && !has_cisco_pwr)
1617 /* If we have both 802.11h and Cisco DTPC, apply both limits
1618 * by picking the smallest of the two power levels advertised.
1620 if (has_80211h_pwr &&
1621 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1622 new_ap_level = pwr_level_80211h;
1624 if (sdata->ap_power_level == new_ap_level)
1628 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1629 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1630 sdata->u.mgd.bssid);
1631 } else { /* has_cisco_pwr is always true here. */
1632 new_ap_level = pwr_level_cisco;
1634 if (sdata->ap_power_level == new_ap_level)
1638 "Limiting TX power to %d dBm as advertised by %pM\n",
1639 pwr_level_cisco, sdata->u.mgd.bssid);
1642 sdata->ap_power_level = new_ap_level;
1643 if (__ieee80211_recalc_txpower(sdata))
1644 return BSS_CHANGED_TXPOWER;
1649 static void ieee80211_enable_ps(struct ieee80211_local *local,
1650 struct ieee80211_sub_if_data *sdata)
1652 struct ieee80211_conf *conf = &local->hw.conf;
1655 * If we are scanning right now then the parameters will
1656 * take effect when scan finishes.
1658 if (local->scanning)
1661 if (conf->dynamic_ps_timeout > 0 &&
1662 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1663 mod_timer(&local->dynamic_ps_timer, jiffies +
1664 msecs_to_jiffies(conf->dynamic_ps_timeout));
1666 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1667 ieee80211_send_nullfunc(local, sdata, true);
1669 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1670 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1673 conf->flags |= IEEE80211_CONF_PS;
1674 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1678 static void ieee80211_change_ps(struct ieee80211_local *local)
1680 struct ieee80211_conf *conf = &local->hw.conf;
1682 if (local->ps_sdata) {
1683 ieee80211_enable_ps(local, local->ps_sdata);
1684 } else if (conf->flags & IEEE80211_CONF_PS) {
1685 conf->flags &= ~IEEE80211_CONF_PS;
1686 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1687 del_timer_sync(&local->dynamic_ps_timer);
1688 cancel_work_sync(&local->dynamic_ps_enable_work);
1692 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1694 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1695 struct sta_info *sta = NULL;
1696 bool authorized = false;
1698 if (!mgd->powersave)
1704 if (!mgd->associated)
1707 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1710 if (!mgd->have_beacon)
1714 sta = sta_info_get(sdata, mgd->bssid);
1716 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1722 /* need to hold RTNL or interface lock */
1723 void ieee80211_recalc_ps(struct ieee80211_local *local)
1725 struct ieee80211_sub_if_data *sdata, *found = NULL;
1729 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1730 local->ps_sdata = NULL;
1734 list_for_each_entry(sdata, &local->interfaces, list) {
1735 if (!ieee80211_sdata_running(sdata))
1737 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1738 /* If an AP vif is found, then disable PS
1739 * by setting the count to zero thereby setting
1745 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1751 if (count == 1 && ieee80211_powersave_allowed(found)) {
1752 u8 dtimper = found->u.mgd.dtim_period;
1754 timeout = local->dynamic_ps_forced_timeout;
1757 local->hw.conf.dynamic_ps_timeout = timeout;
1759 /* If the TIM IE is invalid, pretend the value is 1 */
1763 local->hw.conf.ps_dtim_period = dtimper;
1764 local->ps_sdata = found;
1766 local->ps_sdata = NULL;
1769 ieee80211_change_ps(local);
1772 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1774 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1776 if (sdata->vif.bss_conf.ps != ps_allowed) {
1777 sdata->vif.bss_conf.ps = ps_allowed;
1778 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1782 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1784 struct ieee80211_local *local =
1785 container_of(work, struct ieee80211_local,
1786 dynamic_ps_disable_work);
1788 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1789 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1790 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1793 ieee80211_wake_queues_by_reason(&local->hw,
1794 IEEE80211_MAX_QUEUE_MAP,
1795 IEEE80211_QUEUE_STOP_REASON_PS,
1799 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1801 struct ieee80211_local *local =
1802 container_of(work, struct ieee80211_local,
1803 dynamic_ps_enable_work);
1804 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1805 struct ieee80211_if_managed *ifmgd;
1806 unsigned long flags;
1809 /* can only happen when PS was just disabled anyway */
1813 ifmgd = &sdata->u.mgd;
1815 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1818 if (local->hw.conf.dynamic_ps_timeout > 0) {
1819 /* don't enter PS if TX frames are pending */
1820 if (drv_tx_frames_pending(local)) {
1821 mod_timer(&local->dynamic_ps_timer, jiffies +
1823 local->hw.conf.dynamic_ps_timeout));
1828 * transmission can be stopped by others which leads to
1829 * dynamic_ps_timer expiry. Postpone the ps timer if it
1830 * is not the actual idle state.
1832 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1833 for (q = 0; q < local->hw.queues; q++) {
1834 if (local->queue_stop_reasons[q]) {
1835 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1837 mod_timer(&local->dynamic_ps_timer, jiffies +
1839 local->hw.conf.dynamic_ps_timeout));
1843 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1846 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1847 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1848 if (drv_tx_frames_pending(local)) {
1849 mod_timer(&local->dynamic_ps_timer, jiffies +
1851 local->hw.conf.dynamic_ps_timeout));
1853 ieee80211_send_nullfunc(local, sdata, true);
1854 /* Flush to get the tx status of nullfunc frame */
1855 ieee80211_flush_queues(local, sdata, false);
1859 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1860 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1861 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1862 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1863 local->hw.conf.flags |= IEEE80211_CONF_PS;
1864 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1868 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1870 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1872 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1875 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1877 struct delayed_work *delayed_work = to_delayed_work(work);
1878 struct ieee80211_sub_if_data *sdata =
1879 container_of(delayed_work, struct ieee80211_sub_if_data,
1880 dfs_cac_timer_work);
1881 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1883 mutex_lock(&sdata->local->mtx);
1884 if (sdata->wdev.cac_started) {
1885 ieee80211_vif_release_channel(sdata);
1886 cfg80211_cac_event(sdata->dev, &chandef,
1887 NL80211_RADAR_CAC_FINISHED,
1890 mutex_unlock(&sdata->local->mtx);
1894 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1896 struct ieee80211_local *local = sdata->local;
1897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1901 if (local->hw.queues < IEEE80211_NUM_ACS)
1904 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1905 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1907 unsigned long now = jiffies;
1909 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1910 tx_tspec->admitted_time &&
1911 time_after(now, tx_tspec->time_slice_start + HZ)) {
1912 tx_tspec->consumed_tx_time = 0;
1913 tx_tspec->time_slice_start = now;
1915 if (tx_tspec->downgraded)
1917 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1920 switch (tx_tspec->action) {
1921 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1922 /* take the original parameters */
1923 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1925 "failed to set TX queue parameters for queue %d\n",
1927 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1928 tx_tspec->downgraded = false;
1931 case TX_TSPEC_ACTION_DOWNGRADE:
1932 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1933 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1937 /* downgrade next lower non-ACM AC */
1938 for (non_acm_ac = ac + 1;
1939 non_acm_ac < IEEE80211_NUM_ACS;
1941 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1943 /* Usually the loop will result in using BK even if it
1944 * requires admission control, but such a configuration
1945 * makes no sense and we have to transmit somehow - the
1946 * AC selection does the same thing.
1947 * If we started out trying to downgrade from BK, then
1948 * the extra condition here might be needed.
1950 if (non_acm_ac >= IEEE80211_NUM_ACS)
1951 non_acm_ac = IEEE80211_AC_BK;
1952 if (drv_conf_tx(local, sdata, ac,
1953 &sdata->tx_conf[non_acm_ac]))
1955 "failed to set TX queue parameters for queue %d\n",
1957 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1959 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1960 tx_tspec->time_slice_start + HZ - now + 1);
1962 case TX_TSPEC_ACTION_NONE:
1971 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1973 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1974 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1977 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1979 struct ieee80211_sub_if_data *sdata;
1981 sdata = container_of(work, struct ieee80211_sub_if_data,
1982 u.mgd.tx_tspec_wk.work);
1983 ieee80211_sta_handle_tspec_ac_params(sdata);
1988 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1989 struct ieee80211_sub_if_data *sdata,
1990 const u8 *wmm_param, size_t wmm_param_len,
1991 const struct ieee80211_mu_edca_param_set *mu_edca)
1993 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1996 int count, mu_edca_count, ac;
1998 u8 uapsd_queues = 0;
2000 if (!local->ops->conf_tx)
2003 if (local->hw.queues < IEEE80211_NUM_ACS)
2009 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2012 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2013 uapsd_queues = ifmgd->uapsd_queues;
2015 count = wmm_param[6] & 0x0f;
2016 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2017 * if mu_edca was preset before and now it disappeared tell
2018 * the driver about it.
2020 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2021 if (count == ifmgd->wmm_last_param_set &&
2022 mu_edca_count == ifmgd->mu_edca_last_param_set)
2024 ifmgd->wmm_last_param_set = count;
2025 ifmgd->mu_edca_last_param_set = mu_edca_count;
2027 pos = wmm_param + 8;
2028 left = wmm_param_len - 8;
2030 memset(¶ms, 0, sizeof(params));
2033 for (; left >= 4; left -= 4, pos += 4) {
2034 int aci = (pos[0] >> 5) & 0x03;
2035 int acm = (pos[0] >> 4) & 0x01;
2040 ac = IEEE80211_AC_BK;
2042 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2043 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2045 params[ac].mu_edca = !!mu_edca;
2047 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2050 ac = IEEE80211_AC_VI;
2052 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2053 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2055 params[ac].mu_edca = !!mu_edca;
2057 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2060 ac = IEEE80211_AC_VO;
2062 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2063 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2065 params[ac].mu_edca = !!mu_edca;
2067 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2071 ac = IEEE80211_AC_BE;
2073 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2074 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2076 params[ac].mu_edca = !!mu_edca;
2078 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2082 params[ac].aifs = pos[0] & 0x0f;
2084 if (params[ac].aifs < 2) {
2086 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2087 params[ac].aifs, aci);
2088 params[ac].aifs = 2;
2090 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2091 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2092 params[ac].txop = get_unaligned_le16(pos + 2);
2093 params[ac].acm = acm;
2094 params[ac].uapsd = uapsd;
2096 if (params[ac].cw_min == 0 ||
2097 params[ac].cw_min > params[ac].cw_max) {
2099 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2100 params[ac].cw_min, params[ac].cw_max, aci);
2103 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac);
2106 /* WMM specification requires all 4 ACIs. */
2107 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2108 if (params[ac].cw_min == 0) {
2110 "AP has invalid WMM params (missing AC %d), using defaults\n",
2116 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2118 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2120 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2121 params[ac].txop, params[ac].uapsd,
2122 ifmgd->tx_tspec[ac].downgraded);
2123 sdata->tx_conf[ac] = params[ac];
2124 if (!ifmgd->tx_tspec[ac].downgraded &&
2125 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
2127 "failed to set TX queue parameters for AC %d\n",
2131 /* enable WMM or activate new settings */
2132 sdata->vif.bss_conf.qos = true;
2136 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2138 lockdep_assert_held(&sdata->local->mtx);
2140 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2141 ieee80211_run_deferred_scan(sdata->local);
2144 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2146 mutex_lock(&sdata->local->mtx);
2147 __ieee80211_stop_poll(sdata);
2148 mutex_unlock(&sdata->local->mtx);
2151 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2152 u16 capab, bool erp_valid, u8 erp)
2154 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2155 struct ieee80211_supported_band *sband;
2157 bool use_protection;
2158 bool use_short_preamble;
2159 bool use_short_slot;
2161 sband = ieee80211_get_sband(sdata);
2166 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2167 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2169 use_protection = false;
2170 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2173 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2174 if (sband->band == NL80211_BAND_5GHZ)
2175 use_short_slot = true;
2177 if (use_protection != bss_conf->use_cts_prot) {
2178 bss_conf->use_cts_prot = use_protection;
2179 changed |= BSS_CHANGED_ERP_CTS_PROT;
2182 if (use_short_preamble != bss_conf->use_short_preamble) {
2183 bss_conf->use_short_preamble = use_short_preamble;
2184 changed |= BSS_CHANGED_ERP_PREAMBLE;
2187 if (use_short_slot != bss_conf->use_short_slot) {
2188 bss_conf->use_short_slot = use_short_slot;
2189 changed |= BSS_CHANGED_ERP_SLOT;
2195 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2196 struct cfg80211_bss *cbss,
2197 u32 bss_info_changed)
2199 struct ieee80211_bss *bss = (void *)cbss->priv;
2200 struct ieee80211_local *local = sdata->local;
2201 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2203 bss_info_changed |= BSS_CHANGED_ASSOC;
2204 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2205 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2207 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2208 beacon_loss_count * bss_conf->beacon_int));
2210 sdata->u.mgd.associated = cbss;
2211 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2213 ieee80211_check_rate_mask(sdata);
2215 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2217 if (sdata->vif.p2p ||
2218 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2219 const struct cfg80211_bss_ies *ies;
2222 ies = rcu_dereference(cbss->ies);
2226 ret = cfg80211_get_p2p_attr(
2227 ies->data, ies->len,
2228 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2229 (u8 *) &bss_conf->p2p_noa_attr,
2230 sizeof(bss_conf->p2p_noa_attr));
2232 sdata->u.mgd.p2p_noa_index =
2233 bss_conf->p2p_noa_attr.index;
2234 bss_info_changed |= BSS_CHANGED_P2P_PS;
2240 /* just to be sure */
2241 ieee80211_stop_poll(sdata);
2243 ieee80211_led_assoc(local, 1);
2245 if (sdata->u.mgd.have_beacon) {
2247 * If the AP is buggy we may get here with no DTIM period
2248 * known, so assume it's 1 which is the only safe assumption
2249 * in that case, although if the TIM IE is broken powersave
2250 * probably just won't work at all.
2252 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2253 bss_conf->beacon_rate = bss->beacon_rate;
2254 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2256 bss_conf->beacon_rate = NULL;
2257 bss_conf->dtim_period = 0;
2260 bss_conf->assoc = 1;
2262 /* Tell the driver to monitor connection quality (if supported) */
2263 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2264 bss_conf->cqm_rssi_thold)
2265 bss_info_changed |= BSS_CHANGED_CQM;
2267 /* Enable ARP filtering */
2268 if (bss_conf->arp_addr_cnt)
2269 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2271 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2273 mutex_lock(&local->iflist_mtx);
2274 ieee80211_recalc_ps(local);
2275 mutex_unlock(&local->iflist_mtx);
2277 ieee80211_recalc_smps(sdata);
2278 ieee80211_recalc_ps_vif(sdata);
2280 netif_carrier_on(sdata->dev);
2283 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2284 u16 stype, u16 reason, bool tx,
2287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2288 struct ieee80211_local *local = sdata->local;
2291 sdata_assert_lock(sdata);
2293 if (WARN_ON_ONCE(tx && !frame_buf))
2296 if (WARN_ON(!ifmgd->associated))
2299 ieee80211_stop_poll(sdata);
2301 ifmgd->associated = NULL;
2302 netif_carrier_off(sdata->dev);
2305 * if we want to get out of ps before disassoc (why?) we have
2306 * to do it before sending disassoc, as otherwise the null-packet
2309 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2310 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2311 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2313 local->ps_sdata = NULL;
2315 /* disable per-vif ps */
2316 ieee80211_recalc_ps_vif(sdata);
2318 /* make sure ongoing transmission finishes */
2322 * drop any frame before deauth/disassoc, this can be data or
2323 * management frame. Since we are disconnecting, we should not
2324 * insist sending these frames which can take time and delay
2325 * the disconnection and possible the roaming.
2328 ieee80211_flush_queues(local, sdata, true);
2330 /* deauthenticate/disassociate now */
2331 if (tx || frame_buf) {
2333 * In multi channel scenarios guarantee that the virtual
2334 * interface is granted immediate airtime to transmit the
2335 * deauthentication frame by calling mgd_prepare_tx, if the
2336 * driver requested so.
2338 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2339 !ifmgd->have_beacon)
2340 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2342 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid,
2343 ifmgd->bssid, stype, reason,
2347 /* flush out frame - make sure the deauth was actually sent */
2349 ieee80211_flush_queues(local, sdata, false);
2351 /* clear bssid only after building the needed mgmt frames */
2352 eth_zero_addr(ifmgd->bssid);
2354 /* remove AP and TDLS peers */
2355 sta_info_flush(sdata);
2357 /* finally reset all BSS / config parameters */
2358 changed |= ieee80211_reset_erp_info(sdata);
2360 ieee80211_led_assoc(local, 0);
2361 changed |= BSS_CHANGED_ASSOC;
2362 sdata->vif.bss_conf.assoc = false;
2364 ifmgd->p2p_noa_index = -1;
2365 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2366 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2368 /* on the next assoc, re-program HT/VHT parameters */
2369 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2370 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2371 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2372 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2374 /* reset MU-MIMO ownership and group data */
2375 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2376 sizeof(sdata->vif.bss_conf.mu_group.membership));
2377 memset(sdata->vif.bss_conf.mu_group.position, 0,
2378 sizeof(sdata->vif.bss_conf.mu_group.position));
2379 changed |= BSS_CHANGED_MU_GROUPS;
2380 sdata->vif.mu_mimo_owner = false;
2382 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2384 del_timer_sync(&local->dynamic_ps_timer);
2385 cancel_work_sync(&local->dynamic_ps_enable_work);
2387 /* Disable ARP filtering */
2388 if (sdata->vif.bss_conf.arp_addr_cnt)
2389 changed |= BSS_CHANGED_ARP_FILTER;
2391 sdata->vif.bss_conf.qos = false;
2392 changed |= BSS_CHANGED_QOS;
2394 /* The BSSID (not really interesting) and HT changed */
2395 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2396 ieee80211_bss_info_change_notify(sdata, changed);
2398 /* disassociated - set to defaults now */
2399 ieee80211_set_wmm_default(sdata, false, false);
2401 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2402 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2403 del_timer_sync(&sdata->u.mgd.timer);
2404 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2406 sdata->vif.bss_conf.dtim_period = 0;
2407 sdata->vif.bss_conf.beacon_rate = NULL;
2409 ifmgd->have_beacon = false;
2412 mutex_lock(&local->mtx);
2413 ieee80211_vif_release_channel(sdata);
2415 sdata->vif.csa_active = false;
2416 ifmgd->csa_waiting_bcn = false;
2417 ifmgd->csa_ignored_same_chan = false;
2418 if (sdata->csa_block_tx) {
2419 ieee80211_wake_vif_queues(local, sdata,
2420 IEEE80211_QUEUE_STOP_REASON_CSA);
2421 sdata->csa_block_tx = false;
2423 mutex_unlock(&local->mtx);
2425 /* existing TX TSPEC sessions no longer exist */
2426 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2427 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2429 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2432 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2433 struct ieee80211_hdr *hdr)
2436 * We can postpone the mgd.timer whenever receiving unicast frames
2437 * from AP because we know that the connection is working both ways
2438 * at that time. But multicast frames (and hence also beacons) must
2439 * be ignored here, because we need to trigger the timer during
2440 * data idle periods for sending the periodic probe request to the
2441 * AP we're connected to.
2443 if (is_multicast_ether_addr(hdr->addr1))
2446 ieee80211_sta_reset_conn_monitor(sdata);
2449 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2451 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2452 struct ieee80211_local *local = sdata->local;
2454 mutex_lock(&local->mtx);
2455 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2458 __ieee80211_stop_poll(sdata);
2460 mutex_lock(&local->iflist_mtx);
2461 ieee80211_recalc_ps(local);
2462 mutex_unlock(&local->iflist_mtx);
2464 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2468 * We've received a probe response, but are not sure whether
2469 * we have or will be receiving any beacons or data, so let's
2470 * schedule the timers again, just in case.
2472 ieee80211_sta_reset_beacon_monitor(sdata);
2474 mod_timer(&ifmgd->conn_mon_timer,
2475 round_jiffies_up(jiffies +
2476 IEEE80211_CONNECTION_IDLE_TIME));
2478 mutex_unlock(&local->mtx);
2481 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2482 struct ieee80211_hdr *hdr,
2485 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2486 u16 tid = ieee80211_get_tid(hdr);
2487 int ac = ieee80211_ac_from_tid(tid);
2488 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2489 unsigned long now = jiffies;
2491 if (likely(!tx_tspec->admitted_time))
2494 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2495 tx_tspec->consumed_tx_time = 0;
2496 tx_tspec->time_slice_start = now;
2498 if (tx_tspec->downgraded) {
2499 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2500 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2504 if (tx_tspec->downgraded)
2507 tx_tspec->consumed_tx_time += tx_time;
2509 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2510 tx_tspec->downgraded = true;
2511 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2512 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2516 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2517 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2519 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2521 if (!ieee80211_is_data(hdr->frame_control))
2524 if (ieee80211_is_any_nullfunc(hdr->frame_control) &&
2525 sdata->u.mgd.probe_send_count > 0) {
2527 ieee80211_sta_reset_conn_monitor(sdata);
2529 sdata->u.mgd.nullfunc_failed = true;
2530 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2535 ieee80211_sta_reset_conn_monitor(sdata);
2538 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2539 const u8 *src, const u8 *dst,
2540 const u8 *ssid, size_t ssid_len,
2541 struct ieee80211_channel *channel)
2543 struct sk_buff *skb;
2545 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2546 ssid, ssid_len, NULL, 0,
2547 IEEE80211_PROBE_FLAG_DIRECTED);
2549 ieee80211_tx_skb(sdata, skb);
2552 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2556 u8 *dst = ifmgd->associated->bssid;
2557 u8 unicast_limit = max(1, max_probe_tries - 3);
2558 struct sta_info *sta;
2561 * Try sending broadcast probe requests for the last three
2562 * probe requests after the first ones failed since some
2563 * buggy APs only support broadcast probe requests.
2565 if (ifmgd->probe_send_count >= unicast_limit)
2569 * When the hardware reports an accurate Tx ACK status, it's
2570 * better to send a nullfunc frame instead of a probe request,
2571 * as it will kick us off the AP quickly if we aren't associated
2572 * anymore. The timeout will be reset if the frame is ACKed by
2575 ifmgd->probe_send_count++;
2578 mutex_lock(&sdata->local->sta_mtx);
2579 sta = sta_info_get(sdata, dst);
2581 ieee80211_check_fast_rx(sta);
2582 mutex_unlock(&sdata->local->sta_mtx);
2585 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2586 ifmgd->nullfunc_failed = false;
2587 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
2588 ifmgd->probe_send_count--;
2590 ieee80211_send_nullfunc(sdata->local, sdata, false);
2595 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2596 if (WARN_ON_ONCE(ssid == NULL))
2601 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2603 ifmgd->associated->channel);
2607 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2608 run_again(sdata, ifmgd->probe_timeout);
2611 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2615 bool already = false;
2617 if (!ieee80211_sdata_running(sdata))
2622 if (!ifmgd->associated)
2625 mutex_lock(&sdata->local->mtx);
2627 if (sdata->local->tmp_channel || sdata->local->scanning) {
2628 mutex_unlock(&sdata->local->mtx);
2633 mlme_dbg_ratelimited(sdata,
2634 "detected beacon loss from AP (missed %d beacons) - probing\n",
2637 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2641 * The driver/our work has already reported this event or the
2642 * connection monitoring has kicked in and we have already sent
2643 * a probe request. Or maybe the AP died and the driver keeps
2644 * reporting until we disassociate...
2646 * In either case we have to ignore the current call to this
2647 * function (except for setting the correct probe reason bit)
2648 * because otherwise we would reset the timer every time and
2649 * never check whether we received a probe response!
2651 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2654 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2656 mutex_unlock(&sdata->local->mtx);
2661 mutex_lock(&sdata->local->iflist_mtx);
2662 ieee80211_recalc_ps(sdata->local);
2663 mutex_unlock(&sdata->local->iflist_mtx);
2665 ifmgd->probe_send_count = 0;
2666 ieee80211_mgd_probe_ap_send(sdata);
2668 sdata_unlock(sdata);
2671 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2672 struct ieee80211_vif *vif)
2674 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2675 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2676 struct cfg80211_bss *cbss;
2677 struct sk_buff *skb;
2681 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2684 sdata_assert_lock(sdata);
2686 if (ifmgd->associated)
2687 cbss = ifmgd->associated;
2688 else if (ifmgd->auth_data)
2689 cbss = ifmgd->auth_data->bss;
2690 else if (ifmgd->assoc_data)
2691 cbss = ifmgd->assoc_data->bss;
2696 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2697 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN,
2698 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1))
2703 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2704 (u32) -1, cbss->channel,
2706 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2711 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2713 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2714 const u8 *buf, size_t len, bool tx,
2717 struct ieee80211_event event = {
2719 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2720 .u.mlme.reason = reason,
2724 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2726 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2728 drv_event_callback(sdata->local, sdata, &event);
2731 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2733 struct ieee80211_local *local = sdata->local;
2734 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2735 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2739 if (!ifmgd->associated) {
2740 sdata_unlock(sdata);
2744 tx = !sdata->csa_block_tx;
2746 /* AP is probably out of range (or not reachable for another reason) so
2747 * remove the bss struct for that AP.
2749 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2751 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2752 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2754 mutex_lock(&local->mtx);
2755 sdata->vif.csa_active = false;
2756 ifmgd->csa_waiting_bcn = false;
2757 if (sdata->csa_block_tx) {
2758 ieee80211_wake_vif_queues(local, sdata,
2759 IEEE80211_QUEUE_STOP_REASON_CSA);
2760 sdata->csa_block_tx = false;
2762 mutex_unlock(&local->mtx);
2764 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2765 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2767 sdata_unlock(sdata);
2770 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2772 struct ieee80211_sub_if_data *sdata =
2773 container_of(work, struct ieee80211_sub_if_data,
2774 u.mgd.beacon_connection_loss_work);
2775 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2777 if (ifmgd->associated)
2778 ifmgd->beacon_loss_count++;
2780 if (ifmgd->connection_loss) {
2781 sdata_info(sdata, "Connection to AP %pM lost\n",
2783 __ieee80211_disconnect(sdata);
2785 ieee80211_mgd_probe_ap(sdata, true);
2789 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2791 struct ieee80211_sub_if_data *sdata =
2792 container_of(work, struct ieee80211_sub_if_data,
2793 u.mgd.csa_connection_drop_work);
2795 __ieee80211_disconnect(sdata);
2798 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2800 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2801 struct ieee80211_hw *hw = &sdata->local->hw;
2803 trace_api_beacon_loss(sdata);
2805 sdata->u.mgd.connection_loss = false;
2806 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2808 EXPORT_SYMBOL(ieee80211_beacon_loss);
2810 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2812 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2813 struct ieee80211_hw *hw = &sdata->local->hw;
2815 trace_api_connection_loss(sdata);
2817 sdata->u.mgd.connection_loss = true;
2818 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2820 EXPORT_SYMBOL(ieee80211_connection_loss);
2823 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2826 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2828 sdata_assert_lock(sdata);
2832 * we are not authenticated yet, the only timer that could be
2833 * running is the timeout for the authentication response which
2834 * which is not relevant anymore.
2836 del_timer_sync(&sdata->u.mgd.timer);
2837 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2839 eth_zero_addr(sdata->u.mgd.bssid);
2840 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2841 sdata->u.mgd.flags = 0;
2842 mutex_lock(&sdata->local->mtx);
2843 ieee80211_vif_release_channel(sdata);
2844 mutex_unlock(&sdata->local->mtx);
2847 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2849 sdata->u.mgd.auth_data = NULL;
2852 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2853 bool assoc, bool abandon)
2855 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2857 sdata_assert_lock(sdata);
2861 * we are not associated yet, the only timer that could be
2862 * running is the timeout for the association response which
2863 * which is not relevant anymore.
2865 del_timer_sync(&sdata->u.mgd.timer);
2866 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2868 eth_zero_addr(sdata->u.mgd.bssid);
2869 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2870 sdata->u.mgd.flags = 0;
2871 sdata->vif.mu_mimo_owner = false;
2873 mutex_lock(&sdata->local->mtx);
2874 ieee80211_vif_release_channel(sdata);
2875 mutex_unlock(&sdata->local->mtx);
2878 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2882 sdata->u.mgd.assoc_data = NULL;
2885 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2886 struct ieee80211_mgmt *mgmt, size_t len)
2888 struct ieee80211_local *local = sdata->local;
2889 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2891 struct ieee802_11_elems elems;
2894 pos = mgmt->u.auth.variable;
2895 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2896 mgmt->bssid, auth_data->bss->bssid);
2897 if (!elems.challenge)
2899 auth_data->expected_transaction = 4;
2900 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2901 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2902 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2903 IEEE80211_TX_INTFL_MLME_CONN_TX;
2904 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2905 elems.challenge - 2, elems.challenge_len + 2,
2906 auth_data->bss->bssid, auth_data->bss->bssid,
2907 auth_data->key, auth_data->key_len,
2908 auth_data->key_idx, tx_flags);
2911 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2915 struct sta_info *sta;
2918 sdata_info(sdata, "authenticated\n");
2919 ifmgd->auth_data->done = true;
2920 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2921 ifmgd->auth_data->timeout_started = true;
2922 run_again(sdata, ifmgd->auth_data->timeout);
2924 /* move station state to auth */
2925 mutex_lock(&sdata->local->sta_mtx);
2926 sta = sta_info_get(sdata, bssid);
2928 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2932 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2933 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2939 mutex_unlock(&sdata->local->sta_mtx);
2943 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2944 struct ieee80211_mgmt *mgmt, size_t len)
2946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2948 u16 auth_alg, auth_transaction, status_code;
2949 struct ieee80211_event event = {
2951 .u.mlme.data = AUTH_EVENT,
2954 sdata_assert_lock(sdata);
2959 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2962 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2964 if (!ether_addr_equal(bssid, mgmt->bssid))
2967 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2968 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2969 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2971 if (auth_alg != ifmgd->auth_data->algorithm ||
2972 (auth_alg != WLAN_AUTH_SAE &&
2973 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2974 (auth_alg == WLAN_AUTH_SAE &&
2975 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2976 auth_transaction > 2))) {
2977 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2978 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2980 ifmgd->auth_data->expected_transaction);
2984 if (status_code != WLAN_STATUS_SUCCESS) {
2985 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2987 if (auth_alg == WLAN_AUTH_SAE &&
2988 status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED)
2991 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2992 mgmt->sa, status_code);
2993 ieee80211_destroy_auth_data(sdata, false);
2994 event.u.mlme.status = MLME_DENIED;
2995 event.u.mlme.reason = status_code;
2996 drv_event_callback(sdata->local, sdata, &event);
3000 switch (ifmgd->auth_data->algorithm) {
3001 case WLAN_AUTH_OPEN:
3002 case WLAN_AUTH_LEAP:
3005 case WLAN_AUTH_FILS_SK:
3006 case WLAN_AUTH_FILS_SK_PFS:
3007 case WLAN_AUTH_FILS_PK:
3009 case WLAN_AUTH_SHARED_KEY:
3010 if (ifmgd->auth_data->expected_transaction != 4) {
3011 ieee80211_auth_challenge(sdata, mgmt, len);
3012 /* need another frame */
3017 WARN_ONCE(1, "invalid auth alg %d",
3018 ifmgd->auth_data->algorithm);
3022 event.u.mlme.status = MLME_SUCCESS;
3023 drv_event_callback(sdata->local, sdata, &event);
3024 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3025 (auth_transaction == 2 &&
3026 ifmgd->auth_data->expected_transaction == 2)) {
3027 if (!ieee80211_mark_sta_auth(sdata, bssid))
3028 return; /* ignore frame -- wait for timeout */
3029 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3030 auth_transaction == 2) {
3031 sdata_info(sdata, "SAE peer confirmed\n");
3032 ifmgd->auth_data->peer_confirmed = true;
3035 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3038 #define case_WLAN(type) \
3039 case WLAN_REASON_##type: return #type
3041 const char *ieee80211_get_reason_code_string(u16 reason_code)
3043 switch (reason_code) {
3044 case_WLAN(UNSPECIFIED);
3045 case_WLAN(PREV_AUTH_NOT_VALID);
3046 case_WLAN(DEAUTH_LEAVING);
3047 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3048 case_WLAN(DISASSOC_AP_BUSY);
3049 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3050 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3051 case_WLAN(DISASSOC_STA_HAS_LEFT);
3052 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3053 case_WLAN(DISASSOC_BAD_POWER);
3054 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3055 case_WLAN(INVALID_IE);
3056 case_WLAN(MIC_FAILURE);
3057 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3058 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3059 case_WLAN(IE_DIFFERENT);
3060 case_WLAN(INVALID_GROUP_CIPHER);
3061 case_WLAN(INVALID_PAIRWISE_CIPHER);
3062 case_WLAN(INVALID_AKMP);
3063 case_WLAN(UNSUPP_RSN_VERSION);
3064 case_WLAN(INVALID_RSN_IE_CAP);
3065 case_WLAN(IEEE8021X_FAILED);
3066 case_WLAN(CIPHER_SUITE_REJECTED);
3067 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3068 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3069 case_WLAN(DISASSOC_LOW_ACK);
3070 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3071 case_WLAN(QSTA_LEAVE_QBSS);
3072 case_WLAN(QSTA_NOT_USE);
3073 case_WLAN(QSTA_REQUIRE_SETUP);
3074 case_WLAN(QSTA_TIMEOUT);
3075 case_WLAN(QSTA_CIPHER_NOT_SUPP);
3076 case_WLAN(MESH_PEER_CANCELED);
3077 case_WLAN(MESH_MAX_PEERS);
3078 case_WLAN(MESH_CONFIG);
3079 case_WLAN(MESH_CLOSE);
3080 case_WLAN(MESH_MAX_RETRIES);
3081 case_WLAN(MESH_CONFIRM_TIMEOUT);
3082 case_WLAN(MESH_INVALID_GTK);
3083 case_WLAN(MESH_INCONSISTENT_PARAM);
3084 case_WLAN(MESH_INVALID_SECURITY);
3085 case_WLAN(MESH_PATH_ERROR);
3086 case_WLAN(MESH_PATH_NOFORWARD);
3087 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3088 case_WLAN(MAC_EXISTS_IN_MBSS);
3089 case_WLAN(MESH_CHAN_REGULATORY);
3090 case_WLAN(MESH_CHAN);
3091 default: return "<unknown>";
3095 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3096 struct ieee80211_mgmt *mgmt, size_t len)
3098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3099 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3101 sdata_assert_lock(sdata);
3106 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3107 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3111 if (ifmgd->associated &&
3112 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3113 const u8 *bssid = ifmgd->associated->bssid;
3115 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3117 ieee80211_get_reason_code_string(reason_code));
3119 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3121 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3126 if (ifmgd->assoc_data &&
3127 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3128 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3131 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3133 ieee80211_get_reason_code_string(reason_code));
3135 ieee80211_destroy_assoc_data(sdata, false, true);
3137 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3143 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3144 struct ieee80211_mgmt *mgmt, size_t len)
3146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3149 sdata_assert_lock(sdata);
3154 if (!ifmgd->associated ||
3155 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3158 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3160 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3161 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3165 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3166 mgmt->sa, reason_code,
3167 ieee80211_get_reason_code_string(reason_code));
3169 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3171 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3174 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3175 u8 *supp_rates, unsigned int supp_rates_len,
3176 u32 *rates, u32 *basic_rates,
3177 bool *have_higher_than_11mbit,
3178 int *min_rate, int *min_rate_index,
3183 for (i = 0; i < supp_rates_len; i++) {
3184 int rate = supp_rates[i] & 0x7f;
3185 bool is_basic = !!(supp_rates[i] & 0x80);
3187 if ((rate * 5 * (1 << shift)) > 110)
3188 *have_higher_than_11mbit = true;
3191 * Skip HT, VHT and HE BSS membership selectors since they're
3194 * Note: Even though the membership selector and the basic
3195 * rate flag share the same bit, they are not exactly
3198 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3199 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3200 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY))
3203 for (j = 0; j < sband->n_bitrates; j++) {
3204 struct ieee80211_rate *br;
3207 br = &sband->bitrates[j];
3209 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3210 if (brate == rate) {
3213 *basic_rates |= BIT(j);
3214 if ((rate * 5) < *min_rate) {
3215 *min_rate = rate * 5;
3216 *min_rate_index = j;
3224 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3225 const struct ieee802_11_elems *elems)
3227 if (elems->ext_capab_len < 10)
3230 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3233 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3234 IEEE80211_HE_MAC_CAP0_TWT_RES;
3237 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3238 struct sta_info *sta,
3239 struct ieee802_11_elems *elems)
3241 bool twt = ieee80211_twt_req_supported(sta, elems);
3243 if (sdata->vif.bss_conf.twt_requester != twt) {
3244 sdata->vif.bss_conf.twt_requester = twt;
3245 return BSS_CHANGED_TWT;
3250 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3251 struct cfg80211_bss *cbss,
3252 struct ieee80211_mgmt *mgmt, size_t len,
3253 struct ieee802_11_elems *elems)
3255 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3256 struct ieee80211_local *local = sdata->local;
3257 struct ieee80211_supported_band *sband;
3258 struct sta_info *sta;
3259 u16 capab_info, aid;
3260 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3261 const struct cfg80211_bss_ies *bss_ies = NULL;
3262 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3263 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3268 /* AssocResp and ReassocResp have identical structure */
3270 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3271 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3274 * The 5 MSB of the AID field are reserved
3275 * (802.11-2016 9.4.1.8 AID field)
3279 ifmgd->broken_ap = false;
3281 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3282 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3285 ifmgd->broken_ap = true;
3288 if (!elems->supp_rates) {
3289 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3293 sdata->vif.bss_conf.aid = aid;
3294 ifmgd->tdls_chan_switch_prohibited =
3295 elems->ext_capab && elems->ext_capab_len >= 5 &&
3296 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3299 * Some APs are erroneously not including some information in their
3300 * (re)association response frames. Try to recover by using the data
3301 * from the beacon or probe response. This seems to afflict mobile
3302 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3303 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3306 ((assoc_data->wmm && !elems->wmm_param) ||
3307 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3308 (!elems->ht_cap_elem || !elems->ht_operation)) ||
3309 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3310 (!elems->vht_cap_elem || !elems->vht_operation)))) {
3311 const struct cfg80211_bss_ies *ies;
3312 struct ieee802_11_elems bss_elems;
3315 ies = rcu_dereference(cbss->ies);
3317 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3323 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3326 assoc_data->bss->bssid);
3327 if (assoc_data->wmm &&
3328 !elems->wmm_param && bss_elems.wmm_param) {
3329 elems->wmm_param = bss_elems.wmm_param;
3331 "AP bug: WMM param missing from AssocResp\n");
3335 * Also check if we requested HT/VHT, otherwise the AP doesn't
3336 * have to include the IEs in the (re)association response.
3338 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem &&
3339 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3340 elems->ht_cap_elem = bss_elems.ht_cap_elem;
3342 "AP bug: HT capability missing from AssocResp\n");
3344 if (!elems->ht_operation && bss_elems.ht_operation &&
3345 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3346 elems->ht_operation = bss_elems.ht_operation;
3348 "AP bug: HT operation missing from AssocResp\n");
3350 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem &&
3351 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3352 elems->vht_cap_elem = bss_elems.vht_cap_elem;
3354 "AP bug: VHT capa missing from AssocResp\n");
3356 if (!elems->vht_operation && bss_elems.vht_operation &&
3357 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3358 elems->vht_operation = bss_elems.vht_operation;
3360 "AP bug: VHT operation missing from AssocResp\n");
3365 * We previously checked these in the beacon/probe response, so
3366 * they should be present here. This is just a safety net.
3368 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3369 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
3371 "HT AP is missing WMM params or HT capability/operation\n");
3376 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3377 (!elems->vht_cap_elem || !elems->vht_operation)) {
3379 "VHT AP is missing VHT capability/operation\n");
3384 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3385 !elems->he_6ghz_capa) {
3387 "HE 6 GHz AP is missing HE 6 GHz band capability\n");
3392 mutex_lock(&sdata->local->sta_mtx);
3394 * station info was already allocated and inserted before
3395 * the association and should be available to us
3397 sta = sta_info_get(sdata, cbss->bssid);
3398 if (WARN_ON(!sta)) {
3399 mutex_unlock(&sdata->local->sta_mtx);
3404 sband = ieee80211_get_sband(sdata);
3406 mutex_unlock(&sdata->local->sta_mtx);
3411 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3412 (!elems->he_cap || !elems->he_operation)) {
3413 mutex_unlock(&sdata->local->sta_mtx);
3415 "HE AP is missing HE capability/operation\n");
3420 /* Set up internal HT/VHT capabilities */
3421 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3422 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3423 elems->ht_cap_elem, sta);
3425 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3426 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3427 elems->vht_cap_elem, sta);
3429 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3431 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3434 elems->he_6ghz_capa,
3437 bss_conf->he_support = sta->sta.he_cap.has_he;
3438 if (elems->rsnx && elems->rsnx_len &&
3439 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
3440 wiphy_ext_feature_isset(local->hw.wiphy,
3441 NL80211_EXT_FEATURE_PROTECTED_TWT))
3442 bss_conf->twt_protected = true;
3444 bss_conf->twt_protected = false;
3446 changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
3448 bss_conf->he_support = false;
3449 bss_conf->twt_requester = false;
3450 bss_conf->twt_protected = false;
3453 if (bss_conf->he_support) {
3454 bss_conf->he_bss_color.color =
3455 le32_get_bits(elems->he_operation->he_oper_params,
3456 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3457 bss_conf->he_bss_color.partial =
3458 le32_get_bits(elems->he_operation->he_oper_params,
3459 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
3460 bss_conf->he_bss_color.disabled =
3461 le32_get_bits(elems->he_operation->he_oper_params,
3462 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3463 changed |= BSS_CHANGED_HE_BSS_COLOR;
3465 bss_conf->htc_trig_based_pkt_ext =
3466 le32_get_bits(elems->he_operation->he_oper_params,
3467 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3468 bss_conf->frame_time_rts_th =
3469 le32_get_bits(elems->he_operation->he_oper_params,
3470 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3472 bss_conf->multi_sta_back_32bit =
3473 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3474 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3476 bss_conf->ack_enabled =
3477 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3478 IEEE80211_HE_MAC_CAP2_ACK_EN;
3480 bss_conf->uora_exists = !!elems->uora_element;
3481 if (elems->uora_element)
3482 bss_conf->uora_ocw_range = elems->uora_element[0];
3484 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
3485 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
3486 /* TODO: OPEN: what happens if BSS color disable is set? */
3489 if (cbss->transmitted_bss) {
3490 bss_conf->nontransmitted = true;
3491 ether_addr_copy(bss_conf->transmitter_bssid,
3492 cbss->transmitted_bss->bssid);
3493 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3494 bss_conf->bssid_index = cbss->bssid_index;
3498 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3499 * in their association response, so ignore that data for our own
3500 * configuration. If it changed since the last beacon, we'll get the
3501 * next beacon and update then.
3505 * If an operating mode notification IE is present, override the
3506 * NSS calculation (that would be done in rate_control_rate_init())
3507 * and use the # of streams from that element.
3509 if (elems->opmode_notif &&
3510 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3513 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3514 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3516 sta->sta.rx_nss = nss;
3519 rate_control_rate_init(sta);
3521 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3522 set_sta_flag(sta, WLAN_STA_MFP);
3523 sta->sta.mfp = true;
3525 sta->sta.mfp = false;
3528 sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3530 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3531 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3532 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3535 "failed to move station %pM to desired state\n",
3537 WARN_ON(__sta_info_destroy(sta));
3538 mutex_unlock(&sdata->local->sta_mtx);
3543 mutex_unlock(&sdata->local->sta_mtx);
3546 * Always handle WMM once after association regardless
3547 * of the first value the AP uses. Setting -1 here has
3548 * that effect because the AP values is an unsigned
3551 ifmgd->wmm_last_param_set = -1;
3552 ifmgd->mu_edca_last_param_set = -1;
3554 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3555 ieee80211_set_wmm_default(sdata, false, false);
3556 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param,
3557 elems->wmm_param_len,
3558 elems->mu_edca_param_set)) {
3559 /* still enable QoS since we might have HT/VHT */
3560 ieee80211_set_wmm_default(sdata, false, true);
3561 /* set the disable-WMM flag in this case to disable
3562 * tracking WMM parameter changes in the beacon if
3563 * the parameters weren't actually valid. Doing so
3564 * avoids changing parameters very strangely when
3565 * the AP is going back and forth between valid and
3566 * invalid parameters.
3568 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3570 changed |= BSS_CHANGED_QOS;
3572 if (elems->max_idle_period_ie) {
3573 bss_conf->max_idle_period =
3574 le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
3575 bss_conf->protected_keep_alive =
3576 !!(elems->max_idle_period_ie->idle_options &
3577 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3578 changed |= BSS_CHANGED_KEEP_ALIVE;
3580 bss_conf->max_idle_period = 0;
3581 bss_conf->protected_keep_alive = false;
3584 /* set assoc capability (AID was already set earlier),
3585 * ieee80211_set_associated() will tell the driver */
3586 bss_conf->assoc_capability = capab_info;
3587 ieee80211_set_associated(sdata, cbss, changed);
3590 * If we're using 4-addr mode, let the AP know that we're
3591 * doing so, so that it can create the STA VLAN on its side
3593 if (ifmgd->use_4addr)
3594 ieee80211_send_4addr_nullfunc(local, sdata);
3597 * Start timer to probe the connection to the AP now.
3598 * Also start the timer that will detect beacon loss.
3600 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3601 ieee80211_sta_reset_beacon_monitor(sdata);
3609 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3610 struct ieee80211_mgmt *mgmt,
3613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3614 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3615 u16 capab_info, status_code, aid;
3616 struct ieee802_11_elems elems;
3617 int ac, uapsd_queues = -1;
3620 struct cfg80211_bss *bss;
3621 struct ieee80211_event event = {
3623 .u.mlme.data = ASSOC_EVENT,
3626 sdata_assert_lock(sdata);
3630 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3634 * AssocResp and ReassocResp have identical structure, so process both
3635 * of them in this function.
3641 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3642 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3643 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3644 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3647 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3648 reassoc ? "Rea" : "A", mgmt->sa,
3649 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3651 if (assoc_data->fils_kek_len &&
3652 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3655 pos = mgmt->u.assoc_resp.variable;
3656 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3657 mgmt->bssid, assoc_data->bss->bssid);
3659 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3660 elems.timeout_int &&
3661 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3663 tu = le32_to_cpu(elems.timeout_int->value);
3664 ms = tu * 1024 / 1000;
3666 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3668 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3669 assoc_data->timeout_started = true;
3670 if (ms > IEEE80211_ASSOC_TIMEOUT)
3671 run_again(sdata, assoc_data->timeout);
3675 bss = assoc_data->bss;
3677 if (status_code != WLAN_STATUS_SUCCESS) {
3678 sdata_info(sdata, "%pM denied association (code=%d)\n",
3679 mgmt->sa, status_code);
3680 ieee80211_destroy_assoc_data(sdata, false, false);
3681 event.u.mlme.status = MLME_DENIED;
3682 event.u.mlme.reason = status_code;
3683 drv_event_callback(sdata->local, sdata, &event);
3685 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) {
3686 /* oops -- internal error -- send timeout for now */
3687 ieee80211_destroy_assoc_data(sdata, false, false);
3688 cfg80211_assoc_timeout(sdata->dev, bss);
3691 event.u.mlme.status = MLME_SUCCESS;
3692 drv_event_callback(sdata->local, sdata, &event);
3693 sdata_info(sdata, "associated\n");
3696 * destroy assoc_data afterwards, as otherwise an idle
3697 * recalc after assoc_data is NULL but before associated
3698 * is set can cause the interface to go idle
3700 ieee80211_destroy_assoc_data(sdata, true, false);
3702 /* get uapsd queues configuration */
3704 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3705 if (sdata->tx_conf[ac].uapsd)
3706 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3709 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3710 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3713 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3714 struct ieee80211_mgmt *mgmt, size_t len,
3715 struct ieee80211_rx_status *rx_status)
3717 struct ieee80211_local *local = sdata->local;
3718 struct ieee80211_bss *bss;
3719 struct ieee80211_channel *channel;
3721 sdata_assert_lock(sdata);
3723 channel = ieee80211_get_channel_khz(local->hw.wiphy,
3724 ieee80211_rx_status_to_khz(rx_status));
3728 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3730 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3731 ieee80211_rx_bss_put(local, bss);
3736 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3737 struct sk_buff *skb)
3739 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3740 struct ieee80211_if_managed *ifmgd;
3741 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3742 struct ieee80211_channel *channel;
3743 size_t baselen, len = skb->len;
3745 ifmgd = &sdata->u.mgd;
3747 sdata_assert_lock(sdata);
3750 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
3751 * "If a 6 GHz AP receives a Probe Request frame and responds with
3752 * a Probe Response frame [..], the Address 1 field of the Probe
3753 * Response frame shall be set to the broadcast address [..]"
3754 * So, on 6GHz band we should also accept broadcast responses.
3756 channel = ieee80211_get_channel(sdata->local->hw.wiphy,
3761 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
3762 (channel->band != NL80211_BAND_6GHZ ||
3763 !is_broadcast_ether_addr(mgmt->da)))
3764 return; /* ignore ProbeResp to foreign address */
3766 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3770 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3772 if (ifmgd->associated &&
3773 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3774 ieee80211_reset_ap_probe(sdata);
3778 * This is the canonical list of information elements we care about,
3779 * the filter code also gives us all changes to the Microsoft OUI
3780 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3781 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3782 * changes to requested client power.
3784 * We implement beacon filtering in software since that means we can
3785 * avoid processing the frame here and in cfg80211, and userspace
3786 * will not be able to tell whether the hardware supports it or not.
3788 * XXX: This list needs to be dynamic -- userspace needs to be able to
3789 * add items it requires. It also needs to be able to tell us to
3790 * look out for other vendor IEs.
3792 static const u64 care_about_ies =
3793 (1ULL << WLAN_EID_COUNTRY) |
3794 (1ULL << WLAN_EID_ERP_INFO) |
3795 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3796 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3797 (1ULL << WLAN_EID_HT_CAPABILITY) |
3798 (1ULL << WLAN_EID_HT_OPERATION) |
3799 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3801 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3802 struct ieee80211_if_managed *ifmgd,
3803 struct ieee80211_bss_conf *bss_conf,
3804 struct ieee80211_local *local,
3805 struct ieee80211_rx_status *rx_status)
3807 /* Track average RSSI from the Beacon frames of the current AP */
3809 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3810 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3811 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3812 ifmgd->last_cqm_event_signal = 0;
3813 ifmgd->count_beacon_signal = 1;
3814 ifmgd->last_ave_beacon_signal = 0;
3816 ifmgd->count_beacon_signal++;
3819 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3821 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3822 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3823 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3824 int last_sig = ifmgd->last_ave_beacon_signal;
3825 struct ieee80211_event event = {
3830 * if signal crosses either of the boundaries, invoke callback
3831 * with appropriate parameters
3833 if (sig > ifmgd->rssi_max_thold &&
3834 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3835 ifmgd->last_ave_beacon_signal = sig;
3836 event.u.rssi.data = RSSI_EVENT_HIGH;
3837 drv_event_callback(local, sdata, &event);
3838 } else if (sig < ifmgd->rssi_min_thold &&
3839 (last_sig >= ifmgd->rssi_max_thold ||
3841 ifmgd->last_ave_beacon_signal = sig;
3842 event.u.rssi.data = RSSI_EVENT_LOW;
3843 drv_event_callback(local, sdata, &event);
3847 if (bss_conf->cqm_rssi_thold &&
3848 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3849 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3850 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3851 int last_event = ifmgd->last_cqm_event_signal;
3852 int thold = bss_conf->cqm_rssi_thold;
3853 int hyst = bss_conf->cqm_rssi_hyst;
3856 (last_event == 0 || sig < last_event - hyst)) {
3857 ifmgd->last_cqm_event_signal = sig;
3858 ieee80211_cqm_rssi_notify(
3860 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3862 } else if (sig > thold &&
3863 (last_event == 0 || sig > last_event + hyst)) {
3864 ifmgd->last_cqm_event_signal = sig;
3865 ieee80211_cqm_rssi_notify(
3867 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3872 if (bss_conf->cqm_rssi_low &&
3873 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3874 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3875 int last_event = ifmgd->last_cqm_event_signal;
3876 int low = bss_conf->cqm_rssi_low;
3877 int high = bss_conf->cqm_rssi_high;
3880 (last_event == 0 || last_event >= low)) {
3881 ifmgd->last_cqm_event_signal = sig;
3882 ieee80211_cqm_rssi_notify(
3884 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3886 } else if (sig > high &&
3887 (last_event == 0 || last_event <= high)) {
3888 ifmgd->last_cqm_event_signal = sig;
3889 ieee80211_cqm_rssi_notify(
3891 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3897 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3898 struct cfg80211_bss *bss)
3900 if (ether_addr_equal(tx_bssid, bss->bssid))
3902 if (!bss->transmitted_bss)
3904 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3907 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3908 struct ieee80211_mgmt *mgmt, size_t len,
3909 struct ieee80211_rx_status *rx_status)
3911 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3912 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3914 struct ieee802_11_elems elems;
3915 struct ieee80211_local *local = sdata->local;
3916 struct ieee80211_chanctx_conf *chanctx_conf;
3917 struct ieee80211_channel *chan;
3918 struct sta_info *sta;
3924 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3926 sdata_assert_lock(sdata);
3928 /* Process beacon from the current BSS */
3929 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3934 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3935 if (!chanctx_conf) {
3940 if (ieee80211_rx_status_to_khz(rx_status) !=
3941 ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
3945 chan = chanctx_conf->def.chan;
3948 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3949 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3950 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3951 len - baselen, false, &elems,
3953 ifmgd->assoc_data->bss->bssid);
3955 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3957 if (elems.dtim_period)
3958 ifmgd->dtim_period = elems.dtim_period;
3959 ifmgd->have_beacon = true;
3960 ifmgd->assoc_data->need_beacon = false;
3961 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3962 sdata->vif.bss_conf.sync_tsf =
3963 le64_to_cpu(mgmt->u.beacon.timestamp);
3964 sdata->vif.bss_conf.sync_device_ts =
3965 rx_status->device_timestamp;
3966 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3969 if (elems.mbssid_config_ie)
3970 bss_conf->profile_periodicity =
3971 elems.mbssid_config_ie->profile_periodicity;
3973 if (elems.ext_capab_len >= 11 &&
3974 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3975 bss_conf->ema_ap = true;
3977 /* continue assoc process */
3978 ifmgd->assoc_data->timeout = jiffies;
3979 ifmgd->assoc_data->timeout_started = true;
3980 run_again(sdata, ifmgd->assoc_data->timeout);
3984 if (!ifmgd->associated ||
3985 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated))
3987 bssid = ifmgd->associated->bssid;
3989 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3990 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3993 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3994 mlme_dbg_ratelimited(sdata,
3995 "cancelling AP probe due to a received beacon\n");
3996 ieee80211_reset_ap_probe(sdata);
4000 * Push the beacon loss detection into the future since
4001 * we are processing a beacon from the AP just now.
4003 ieee80211_sta_reset_beacon_monitor(sdata);
4005 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
4006 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
4007 len - baselen, false, &elems,
4008 care_about_ies, ncrc,
4009 mgmt->bssid, bssid);
4011 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
4012 ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) {
4013 if (local->hw.conf.dynamic_ps_timeout > 0) {
4014 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
4015 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
4016 ieee80211_hw_config(local,
4017 IEEE80211_CONF_CHANGE_PS);
4019 ieee80211_send_nullfunc(local, sdata, false);
4020 } else if (!local->pspolling && sdata->u.mgd.powersave) {
4021 local->pspolling = true;
4024 * Here is assumed that the driver will be
4025 * able to send ps-poll frame and receive a
4026 * response even though power save mode is
4027 * enabled, but some drivers might require
4028 * to disable power save here. This needs
4029 * to be investigated.
4031 ieee80211_send_pspoll(local, sdata);
4035 if (sdata->vif.p2p ||
4036 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
4037 struct ieee80211_p2p_noa_attr noa = {};
4040 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
4042 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
4043 (u8 *) &noa, sizeof(noa));
4045 if (sdata->u.mgd.p2p_noa_index != noa.index) {
4046 /* valid noa_attr and index changed */
4047 sdata->u.mgd.p2p_noa_index = noa.index;
4048 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
4049 changed |= BSS_CHANGED_P2P_PS;
4051 * make sure we update all information, the CRC
4052 * mechanism doesn't look at P2P attributes.
4054 ifmgd->beacon_crc_valid = false;
4056 } else if (sdata->u.mgd.p2p_noa_index != -1) {
4057 /* noa_attr not found and we had valid noa_attr before */
4058 sdata->u.mgd.p2p_noa_index = -1;
4059 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
4060 changed |= BSS_CHANGED_P2P_PS;
4061 ifmgd->beacon_crc_valid = false;
4065 if (ifmgd->csa_waiting_bcn)
4066 ieee80211_chswitch_post_beacon(sdata);
4069 * Update beacon timing and dtim count on every beacon appearance. This
4070 * will allow the driver to use the most updated values. Do it before
4071 * comparing this one with last received beacon.
4072 * IMPORTANT: These parameters would possibly be out of sync by the time
4073 * the driver will use them. The synchronized view is currently
4074 * guaranteed only in certain callbacks.
4076 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4077 sdata->vif.bss_conf.sync_tsf =
4078 le64_to_cpu(mgmt->u.beacon.timestamp);
4079 sdata->vif.bss_conf.sync_device_ts =
4080 rx_status->device_timestamp;
4081 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
4084 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
4086 ifmgd->beacon_crc = ncrc;
4087 ifmgd->beacon_crc_valid = true;
4089 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
4091 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
4092 rx_status->device_timestamp,
4095 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
4096 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
4097 elems.wmm_param_len,
4098 elems.mu_edca_param_set))
4099 changed |= BSS_CHANGED_QOS;
4102 * If we haven't had a beacon before, tell the driver about the
4103 * DTIM period (and beacon timing if desired) now.
4105 if (!ifmgd->have_beacon) {
4106 /* a few bogus AP send dtim_period = 0 or no TIM IE */
4107 bss_conf->dtim_period = elems.dtim_period ?: 1;
4109 changed |= BSS_CHANGED_BEACON_INFO;
4110 ifmgd->have_beacon = true;
4112 mutex_lock(&local->iflist_mtx);
4113 ieee80211_recalc_ps(local);
4114 mutex_unlock(&local->iflist_mtx);
4116 ieee80211_recalc_ps_vif(sdata);
4119 if (elems.erp_info) {
4121 erp_value = elems.erp_info[0];
4125 changed |= ieee80211_handle_bss_capability(sdata,
4126 le16_to_cpu(mgmt->u.beacon.capab_info),
4127 erp_valid, erp_value);
4129 mutex_lock(&local->sta_mtx);
4130 sta = sta_info_get(sdata, bssid);
4132 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4134 if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem,
4135 elems.vht_cap_elem, elems.ht_operation,
4136 elems.vht_operation, elems.he_operation,
4138 mutex_unlock(&local->sta_mtx);
4140 "failed to follow AP %pM bandwidth change, disconnect\n",
4142 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4143 WLAN_REASON_DEAUTH_LEAVING,
4145 ieee80211_report_disconnect(sdata, deauth_buf,
4146 sizeof(deauth_buf), true,
4147 WLAN_REASON_DEAUTH_LEAVING);
4151 if (sta && elems.opmode_notif)
4152 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4154 mutex_unlock(&local->sta_mtx);
4156 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4158 elems.country_elem_len,
4159 elems.pwr_constr_elem,
4160 elems.cisco_dtpc_elem);
4162 ieee80211_bss_info_change_notify(sdata, changed);
4165 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4166 struct sk_buff *skb)
4168 struct ieee80211_rx_status *rx_status;
4169 struct ieee80211_mgmt *mgmt;
4171 struct ieee802_11_elems elems;
4174 rx_status = (struct ieee80211_rx_status *) skb->cb;
4175 mgmt = (struct ieee80211_mgmt *) skb->data;
4176 fc = le16_to_cpu(mgmt->frame_control);
4180 switch (fc & IEEE80211_FCTL_STYPE) {
4181 case IEEE80211_STYPE_BEACON:
4182 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4184 case IEEE80211_STYPE_PROBE_RESP:
4185 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4187 case IEEE80211_STYPE_AUTH:
4188 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4190 case IEEE80211_STYPE_DEAUTH:
4191 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4193 case IEEE80211_STYPE_DISASSOC:
4194 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4196 case IEEE80211_STYPE_ASSOC_RESP:
4197 case IEEE80211_STYPE_REASSOC_RESP:
4198 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4200 case IEEE80211_STYPE_ACTION:
4201 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4202 ies_len = skb->len -
4203 offsetof(struct ieee80211_mgmt,
4204 u.action.u.chan_switch.variable);
4209 /* CSA IE cannot be overridden, no need for BSSID */
4210 ieee802_11_parse_elems(
4211 mgmt->u.action.u.chan_switch.variable,
4212 ies_len, true, &elems, mgmt->bssid, NULL);
4214 if (elems.parse_error)
4217 ieee80211_sta_process_chanswitch(sdata,
4219 rx_status->device_timestamp,
4221 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4222 ies_len = skb->len -
4223 offsetof(struct ieee80211_mgmt,
4224 u.action.u.ext_chan_switch.variable);
4230 * extended CSA IE can't be overridden, no need for
4233 ieee802_11_parse_elems(
4234 mgmt->u.action.u.ext_chan_switch.variable,
4235 ies_len, true, &elems, mgmt->bssid, NULL);
4237 if (elems.parse_error)
4240 /* for the handling code pretend this was also an IE */
4241 elems.ext_chansw_ie =
4242 &mgmt->u.action.u.ext_chan_switch.data;
4244 ieee80211_sta_process_chanswitch(sdata,
4246 rx_status->device_timestamp,
4251 sdata_unlock(sdata);
4254 static void ieee80211_sta_timer(struct timer_list *t)
4256 struct ieee80211_sub_if_data *sdata =
4257 from_timer(sdata, t, u.mgd.timer);
4259 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4262 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4263 u8 *bssid, u8 reason, bool tx)
4265 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4267 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4270 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4274 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4276 struct ieee80211_local *local = sdata->local;
4277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4278 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4282 u16 prepare_tx_duration = 0;
4284 sdata_assert_lock(sdata);
4286 if (WARN_ON_ONCE(!auth_data))
4291 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4292 sdata_info(sdata, "authentication with %pM timed out\n",
4293 auth_data->bss->bssid);
4296 * Most likely AP is not in the range so remove the
4297 * bss struct for that AP.
4299 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4304 if (auth_data->algorithm == WLAN_AUTH_SAE)
4305 prepare_tx_duration =
4306 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4308 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4310 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4311 auth_data->bss->bssid, auth_data->tries,
4312 IEEE80211_AUTH_MAX_TRIES);
4314 auth_data->expected_transaction = 2;
4316 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4317 trans = auth_data->sae_trans;
4318 status = auth_data->sae_status;
4319 auth_data->expected_transaction = trans;
4322 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4323 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4324 IEEE80211_TX_INTFL_MLME_CONN_TX;
4326 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4327 auth_data->data, auth_data->data_len,
4328 auth_data->bss->bssid,
4329 auth_data->bss->bssid, NULL, 0, 0,
4332 if (tx_flags == 0) {
4333 if (auth_data->algorithm == WLAN_AUTH_SAE)
4334 auth_data->timeout = jiffies +
4335 IEEE80211_AUTH_TIMEOUT_SAE;
4337 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4339 auth_data->timeout =
4340 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4343 auth_data->timeout_started = true;
4344 run_again(sdata, auth_data->timeout);
4349 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4351 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4352 struct ieee80211_local *local = sdata->local;
4354 sdata_assert_lock(sdata);
4356 assoc_data->tries++;
4357 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4358 sdata_info(sdata, "association with %pM timed out\n",
4359 assoc_data->bss->bssid);
4362 * Most likely AP is not in the range so remove the
4363 * bss struct for that AP.
4365 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4370 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4371 assoc_data->bss->bssid, assoc_data->tries,
4372 IEEE80211_ASSOC_MAX_TRIES);
4373 ieee80211_send_assoc(sdata);
4375 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4376 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4377 assoc_data->timeout_started = true;
4378 run_again(sdata, assoc_data->timeout);
4380 assoc_data->timeout =
4381 round_jiffies_up(jiffies +
4382 IEEE80211_ASSOC_TIMEOUT_LONG);
4383 assoc_data->timeout_started = true;
4384 run_again(sdata, assoc_data->timeout);
4390 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4391 __le16 fc, bool acked)
4393 struct ieee80211_local *local = sdata->local;
4395 sdata->u.mgd.status_fc = fc;
4396 sdata->u.mgd.status_acked = acked;
4397 sdata->u.mgd.status_received = true;
4399 ieee80211_queue_work(&local->hw, &sdata->work);
4402 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4404 struct ieee80211_local *local = sdata->local;
4405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4409 if (ifmgd->status_received) {
4410 __le16 fc = ifmgd->status_fc;
4411 bool status_acked = ifmgd->status_acked;
4413 ifmgd->status_received = false;
4414 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4416 if (ifmgd->auth_data->algorithm ==
4418 ifmgd->auth_data->timeout =
4420 IEEE80211_AUTH_TIMEOUT_SAE;
4422 ifmgd->auth_data->timeout =
4424 IEEE80211_AUTH_TIMEOUT_SHORT;
4425 run_again(sdata, ifmgd->auth_data->timeout);
4427 ifmgd->auth_data->timeout = jiffies - 1;
4429 ifmgd->auth_data->timeout_started = true;
4430 } else if (ifmgd->assoc_data &&
4431 (ieee80211_is_assoc_req(fc) ||
4432 ieee80211_is_reassoc_req(fc))) {
4434 ifmgd->assoc_data->timeout =
4435 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4436 run_again(sdata, ifmgd->assoc_data->timeout);
4438 ifmgd->assoc_data->timeout = jiffies - 1;
4440 ifmgd->assoc_data->timeout_started = true;
4444 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4445 time_after(jiffies, ifmgd->auth_data->timeout)) {
4446 if (ifmgd->auth_data->done) {
4448 * ok ... we waited for assoc but userspace didn't,
4449 * so let's just kill the auth data
4451 ieee80211_destroy_auth_data(sdata, false);
4452 } else if (ieee80211_auth(sdata)) {
4454 struct ieee80211_event event = {
4456 .u.mlme.data = AUTH_EVENT,
4457 .u.mlme.status = MLME_TIMEOUT,
4460 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4462 ieee80211_destroy_auth_data(sdata, false);
4464 cfg80211_auth_timeout(sdata->dev, bssid);
4465 drv_event_callback(sdata->local, sdata, &event);
4467 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4468 run_again(sdata, ifmgd->auth_data->timeout);
4470 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4471 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4472 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4473 ieee80211_do_assoc(sdata)) {
4474 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4475 struct ieee80211_event event = {
4477 .u.mlme.data = ASSOC_EVENT,
4478 .u.mlme.status = MLME_TIMEOUT,
4481 ieee80211_destroy_assoc_data(sdata, false, false);
4482 cfg80211_assoc_timeout(sdata->dev, bss);
4483 drv_event_callback(sdata->local, sdata, &event);
4485 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4486 run_again(sdata, ifmgd->assoc_data->timeout);
4488 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4489 ifmgd->associated) {
4493 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4495 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4496 max_tries = max_nullfunc_tries;
4498 max_tries = max_probe_tries;
4500 /* ACK received for nullfunc probing frame */
4501 if (!ifmgd->probe_send_count)
4502 ieee80211_reset_ap_probe(sdata);
4503 else if (ifmgd->nullfunc_failed) {
4504 if (ifmgd->probe_send_count < max_tries) {
4506 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4507 bssid, ifmgd->probe_send_count,
4509 ieee80211_mgd_probe_ap_send(sdata);
4512 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4514 ieee80211_sta_connection_lost(sdata, bssid,
4515 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4518 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4519 run_again(sdata, ifmgd->probe_timeout);
4520 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4522 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4523 bssid, probe_wait_ms);
4524 ieee80211_sta_connection_lost(sdata, bssid,
4525 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4526 } else if (ifmgd->probe_send_count < max_tries) {
4528 "No probe response from AP %pM after %dms, try %d/%i\n",
4529 bssid, probe_wait_ms,
4530 ifmgd->probe_send_count, max_tries);
4531 ieee80211_mgd_probe_ap_send(sdata);
4534 * We actually lost the connection ... or did we?
4538 "No probe response from AP %pM after %dms, disconnecting.\n",
4539 bssid, probe_wait_ms);
4541 ieee80211_sta_connection_lost(sdata, bssid,
4542 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4546 sdata_unlock(sdata);
4549 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4551 struct ieee80211_sub_if_data *sdata =
4552 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4553 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4555 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4558 sdata->u.mgd.connection_loss = false;
4559 ieee80211_queue_work(&sdata->local->hw,
4560 &sdata->u.mgd.beacon_connection_loss_work);
4563 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4565 struct ieee80211_sub_if_data *sdata =
4566 from_timer(sdata, t, u.mgd.conn_mon_timer);
4567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4568 struct ieee80211_local *local = sdata->local;
4570 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4573 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4576 static void ieee80211_sta_monitor_work(struct work_struct *work)
4578 struct ieee80211_sub_if_data *sdata =
4579 container_of(work, struct ieee80211_sub_if_data,
4580 u.mgd.monitor_work);
4582 ieee80211_mgd_probe_ap(sdata, false);
4585 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4587 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4588 __ieee80211_stop_poll(sdata);
4590 /* let's probe the connection once */
4591 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4592 ieee80211_queue_work(&sdata->local->hw,
4593 &sdata->u.mgd.monitor_work);
4598 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4600 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4601 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4605 if (ifmgd->auth_data || ifmgd->assoc_data) {
4606 const u8 *bssid = ifmgd->auth_data ?
4607 ifmgd->auth_data->bss->bssid :
4608 ifmgd->assoc_data->bss->bssid;
4611 * If we are trying to authenticate / associate while suspending,
4612 * cfg80211 won't know and won't actually abort those attempts,
4613 * thus we need to do that ourselves.
4615 ieee80211_send_deauth_disassoc(sdata, bssid, bssid,
4616 IEEE80211_STYPE_DEAUTH,
4617 WLAN_REASON_DEAUTH_LEAVING,
4619 if (ifmgd->assoc_data)
4620 ieee80211_destroy_assoc_data(sdata, false, true);
4621 if (ifmgd->auth_data)
4622 ieee80211_destroy_auth_data(sdata, false);
4623 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4624 IEEE80211_DEAUTH_FRAME_LEN);
4627 /* This is a bit of a hack - we should find a better and more generic
4628 * solution to this. Normally when suspending, cfg80211 will in fact
4629 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4630 * auth (not so important) or assoc (this is the problem) process.
4632 * As a consequence, it can happen that we are in the process of both
4633 * associating and suspending, and receive an association response
4634 * after cfg80211 has checked if it needs to disconnect, but before
4635 * we actually set the flag to drop incoming frames. This will then
4636 * cause the workqueue flush to process the association response in
4637 * the suspend, resulting in a successful association just before it
4638 * tries to remove the interface from the driver, which now though
4639 * has a channel context assigned ... this results in issues.
4641 * To work around this (for now) simply deauth here again if we're
4644 if (ifmgd->associated && !sdata->local->wowlan) {
4646 struct cfg80211_deauth_request req = {
4647 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4651 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4652 ieee80211_mgd_deauth(sdata, &req);
4655 sdata_unlock(sdata);
4658 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4660 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4663 if (!ifmgd->associated) {
4664 sdata_unlock(sdata);
4668 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4669 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4670 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4671 ieee80211_sta_connection_lost(sdata,
4672 ifmgd->associated->bssid,
4673 WLAN_REASON_UNSPECIFIED,
4675 sdata_unlock(sdata);
4678 sdata_unlock(sdata);
4682 /* interface setup */
4683 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4685 struct ieee80211_if_managed *ifmgd;
4687 ifmgd = &sdata->u.mgd;
4688 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4689 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4690 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4691 ieee80211_beacon_connection_loss_work);
4692 INIT_WORK(&ifmgd->csa_connection_drop_work,
4693 ieee80211_csa_connection_drop_work);
4694 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4695 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4696 ieee80211_tdls_peer_del_work);
4697 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4698 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4699 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4700 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4701 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4702 ieee80211_sta_handle_tspec_ac_params_wk);
4705 ifmgd->powersave = sdata->wdev.ps;
4706 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4707 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4708 ifmgd->p2p_noa_index = -1;
4710 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4711 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4713 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4715 /* Setup TDLS data */
4716 spin_lock_init(&ifmgd->teardown_lock);
4717 ifmgd->teardown_skb = NULL;
4718 ifmgd->orig_teardown_skb = NULL;
4721 /* scan finished notification */
4722 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4724 struct ieee80211_sub_if_data *sdata;
4726 /* Restart STA timers */
4728 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4729 if (ieee80211_sdata_running(sdata))
4730 ieee80211_restart_sta_timer(sdata);
4735 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4736 struct cfg80211_bss *cbss)
4738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4739 const u8 *ht_cap_ie, *vht_cap_ie;
4740 const struct ieee80211_ht_cap *ht_cap;
4741 const struct ieee80211_vht_cap *vht_cap;
4744 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4747 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4748 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4749 ht_cap = (void *)(ht_cap_ie + 2);
4750 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4752 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4753 * "Tx Unequal Modulation Supported" fields.
4757 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4760 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4761 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4765 vht_cap = (void *)(vht_cap_ie + 2);
4766 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4767 for (nss = 8; nss > 0; nss--) {
4768 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4769 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4772 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4773 chains = max(chains, nss);
4780 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4781 const struct ieee80211_he_operation *he_op)
4783 const struct ieee80211_sta_he_cap *sta_he_cap =
4784 ieee80211_get_he_sta_cap(sband);
4788 if (!sta_he_cap || !he_op)
4791 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4793 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4794 for (i = 0; i < 3; i++) {
4795 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4796 &sta_he_cap->he_mcs_nss_supp;
4797 u16 sta_mcs_map_rx =
4798 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4799 u16 sta_mcs_map_tx =
4800 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4802 bool verified = true;
4805 * For each band there is a maximum of 8 spatial streams
4806 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4807 * of 2 bits per NSS (1-8), with the values defined in enum
4808 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4809 * capabilities aren't less than the AP's minimum requirements
4810 * for this HE BSS per SS.
4811 * It is enough to find one such band that meets the reqs.
4813 for (nss = 8; nss > 0; nss--) {
4814 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4815 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4816 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4818 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4822 * Make sure the HE AP doesn't require MCSs that aren't
4823 * supported by the client
4825 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4826 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4827 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4837 /* If here, STA doesn't meet AP's HE min requirements */
4841 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4842 struct cfg80211_bss *cbss)
4844 struct ieee80211_local *local = sdata->local;
4845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4846 const struct ieee80211_ht_cap *ht_cap = NULL;
4847 const struct ieee80211_ht_operation *ht_oper = NULL;
4848 const struct ieee80211_vht_operation *vht_oper = NULL;
4849 const struct ieee80211_he_operation *he_oper = NULL;
4850 struct ieee80211_supported_band *sband;
4851 struct cfg80211_chan_def chandef;
4852 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4853 struct ieee80211_bss *bss = (void *)cbss->priv;
4858 sband = local->hw.wiphy->bands[cbss->channel->band];
4860 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4861 IEEE80211_STA_DISABLE_80P80MHZ |
4862 IEEE80211_STA_DISABLE_160MHZ);
4864 /* disable HT/VHT/HE if we don't support them */
4865 if (!sband->ht_cap.ht_supported && !is_6ghz) {
4866 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4867 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4868 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4871 if (!sband->vht_cap.vht_supported && !is_6ghz) {
4872 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4873 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4876 if (!ieee80211_get_he_sta_cap(sband))
4877 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4881 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
4882 const u8 *ht_oper_ie, *ht_cap_ie;
4884 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4885 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4886 ht_oper = (void *)(ht_oper_ie + 2);
4888 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4889 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4890 ht_cap = (void *)(ht_cap_ie + 2);
4893 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4898 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) {
4899 const u8 *vht_oper_ie, *vht_cap;
4901 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4902 WLAN_EID_VHT_OPERATION);
4903 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4904 vht_oper = (void *)(vht_oper_ie + 2);
4905 if (vht_oper && !ht_oper) {
4908 "AP advertised VHT without HT, disabling HT/VHT/HE\n");
4909 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4910 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4911 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4914 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4915 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4916 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4921 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4922 const struct cfg80211_bss_ies *ies;
4923 const u8 *he_oper_ie;
4925 ies = rcu_dereference(cbss->ies);
4926 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4927 ies->data, ies->len);
4929 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4930 he_oper = (void *)(he_oper_ie + 3);
4934 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4935 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4938 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4940 for (i = 0; i < sband->n_channels; i++) {
4941 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4942 IEEE80211_CHAN_NO_80MHZ))
4950 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4952 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4955 ht_oper, vht_oper, he_oper,
4958 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4963 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) {
4964 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
4968 /* will change later if needed */
4969 sdata->smps_mode = IEEE80211_SMPS_OFF;
4971 mutex_lock(&local->mtx);
4973 * If this fails (possibly due to channel context sharing
4974 * on incompatible channels, e.g. 80+80 and 160 sharing the
4975 * same control channel) try to use a smaller bandwidth.
4977 ret = ieee80211_vif_use_channel(sdata, &chandef,
4978 IEEE80211_CHANCTX_SHARED);
4980 /* don't downgrade for 5 and 10 MHz channels, though. */
4981 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4982 chandef.width == NL80211_CHAN_WIDTH_10)
4985 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4986 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4987 ret = ieee80211_vif_use_channel(sdata, &chandef,
4988 IEEE80211_CHANCTX_SHARED);
4991 mutex_unlock(&local->mtx);
4995 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4996 u8 *dtim_count, u8 *dtim_period)
4998 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4999 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
5001 const struct ieee80211_tim_ie *tim = NULL;
5002 const struct ieee80211_bssid_index *idx;
5003 bool valid = tim_ie && tim_ie[1] >= 2;
5006 tim = (void *)(tim_ie + 2);
5009 *dtim_count = valid ? tim->dtim_count : 0;
5012 *dtim_period = valid ? tim->dtim_period : 0;
5014 /* Check if value is overridden by non-transmitted profile */
5015 if (!idx_ie || idx_ie[1] < 3)
5018 idx = (void *)(idx_ie + 2);
5021 *dtim_count = idx->dtim_count;
5024 *dtim_period = idx->dtim_period;
5029 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5030 struct cfg80211_bss *cbss, bool assoc,
5033 struct ieee80211_local *local = sdata->local;
5034 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5035 struct ieee80211_bss *bss = (void *)cbss->priv;
5036 struct sta_info *new_sta = NULL;
5037 struct ieee80211_supported_band *sband;
5038 bool have_sta = false;
5041 sband = local->hw.wiphy->bands[cbss->channel->band];
5043 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
5046 /* If a reconfig is happening, bail out */
5047 if (local->in_reconfig)
5052 have_sta = sta_info_get(sdata, cbss->bssid);
5057 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
5063 * Set up the information for the new channel before setting the
5064 * new channel. We can't - completely race-free - change the basic
5065 * rates bitmap and the channel (sband) that it refers to, but if
5066 * we set it up before we at least avoid calling into the driver's
5067 * bss_info_changed() method with invalid information (since we do
5068 * call that from changing the channel - only for IDLE and perhaps
5069 * some others, but ...).
5071 * So to avoid that, just set up all the new information before the
5072 * channel, but tell the driver to apply it only afterwards, since
5073 * it might need the new channel for that.
5076 u32 rates = 0, basic_rates = 0;
5077 bool have_higher_than_11mbit;
5078 int min_rate = INT_MAX, min_rate_index = -1;
5079 const struct cfg80211_bss_ies *ies;
5080 int shift = ieee80211_vif_get_shift(&sdata->vif);
5082 ieee80211_get_rates(sband, bss->supp_rates,
5083 bss->supp_rates_len,
5084 &rates, &basic_rates,
5085 &have_higher_than_11mbit,
5086 &min_rate, &min_rate_index,
5090 * This used to be a workaround for basic rates missing
5091 * in the association response frame. Now that we no
5092 * longer use the basic rates from there, it probably
5093 * doesn't happen any more, but keep the workaround so
5094 * in case some *other* APs are buggy in different ways
5095 * we can connect -- with a warning.
5096 * Allow this workaround only in case the AP provided at least
5099 if (min_rate_index < 0) {
5101 "No legacy rates in association response\n");
5103 sta_info_free(local, new_sta);
5105 } else if (!basic_rates) {
5107 "No basic rates, using min rate instead\n");
5108 basic_rates = BIT(min_rate_index);
5112 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5115 "No rates found, keeping mandatory only\n");
5117 sdata->vif.bss_conf.basic_rates = basic_rates;
5119 /* cf. IEEE 802.11 9.2.12 */
5120 if (cbss->channel->band == NL80211_BAND_2GHZ &&
5121 have_higher_than_11mbit)
5122 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
5124 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
5126 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
5128 /* set timing information */
5129 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
5131 ies = rcu_dereference(cbss->beacon_ies);
5133 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5134 sdata->vif.bss_conf.sync_device_ts =
5135 bss->device_ts_beacon;
5137 ieee80211_get_dtim(ies,
5138 &sdata->vif.bss_conf.sync_dtim_count,
5140 } else if (!ieee80211_hw_check(&sdata->local->hw,
5141 TIMING_BEACON_ONLY)) {
5142 ies = rcu_dereference(cbss->proberesp_ies);
5143 /* must be non-NULL since beacon IEs were NULL */
5144 sdata->vif.bss_conf.sync_tsf = ies->tsf;
5145 sdata->vif.bss_conf.sync_device_ts =
5146 bss->device_ts_presp;
5147 sdata->vif.bss_conf.sync_dtim_count = 0;
5149 sdata->vif.bss_conf.sync_tsf = 0;
5150 sdata->vif.bss_conf.sync_device_ts = 0;
5151 sdata->vif.bss_conf.sync_dtim_count = 0;
5156 if (new_sta || override) {
5157 err = ieee80211_prep_channel(sdata, cbss);
5160 sta_info_free(local, new_sta);
5167 * tell driver about BSSID, basic rates and timing
5168 * this was set up above, before setting the channel
5170 ieee80211_bss_info_change_notify(sdata,
5171 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5172 BSS_CHANGED_BEACON_INT);
5175 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5177 err = sta_info_insert(new_sta);
5181 "failed to insert STA entry for the AP (error %d)\n",
5186 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5188 /* Cancel scan to ensure that nothing interferes with connection */
5189 if (local->scanning)
5190 ieee80211_scan_cancel(local);
5196 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5197 struct cfg80211_auth_request *req)
5199 struct ieee80211_local *local = sdata->local;
5200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5201 struct ieee80211_mgd_auth_data *auth_data;
5206 /* prepare auth data structure */
5208 switch (req->auth_type) {
5209 case NL80211_AUTHTYPE_OPEN_SYSTEM:
5210 auth_alg = WLAN_AUTH_OPEN;
5212 case NL80211_AUTHTYPE_SHARED_KEY:
5215 auth_alg = WLAN_AUTH_SHARED_KEY;
5217 case NL80211_AUTHTYPE_FT:
5218 auth_alg = WLAN_AUTH_FT;
5220 case NL80211_AUTHTYPE_NETWORK_EAP:
5221 auth_alg = WLAN_AUTH_LEAP;
5223 case NL80211_AUTHTYPE_SAE:
5224 auth_alg = WLAN_AUTH_SAE;
5226 case NL80211_AUTHTYPE_FILS_SK:
5227 auth_alg = WLAN_AUTH_FILS_SK;
5229 case NL80211_AUTHTYPE_FILS_SK_PFS:
5230 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5232 case NL80211_AUTHTYPE_FILS_PK:
5233 auth_alg = WLAN_AUTH_FILS_PK;
5239 if (ifmgd->assoc_data)
5242 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5243 req->ie_len, GFP_KERNEL);
5247 auth_data->bss = req->bss;
5249 if (req->auth_data_len >= 4) {
5250 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5251 __le16 *pos = (__le16 *) req->auth_data;
5253 auth_data->sae_trans = le16_to_cpu(pos[0]);
5254 auth_data->sae_status = le16_to_cpu(pos[1]);
5256 memcpy(auth_data->data, req->auth_data + 4,
5257 req->auth_data_len - 4);
5258 auth_data->data_len += req->auth_data_len - 4;
5261 /* Check if continuing authentication or trying to authenticate with the
5262 * same BSS that we were in the process of authenticating with and avoid
5263 * removal and re-addition of the STA entry in
5264 * ieee80211_prep_connection().
5266 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5268 if (req->ie && req->ie_len) {
5269 memcpy(&auth_data->data[auth_data->data_len],
5270 req->ie, req->ie_len);
5271 auth_data->data_len += req->ie_len;
5274 if (req->key && req->key_len) {
5275 auth_data->key_len = req->key_len;
5276 auth_data->key_idx = req->key_idx;
5277 memcpy(auth_data->key, req->key, req->key_len);
5280 auth_data->algorithm = auth_alg;
5282 /* try to authenticate/probe */
5284 if (ifmgd->auth_data) {
5285 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5286 auth_data->peer_confirmed =
5287 ifmgd->auth_data->peer_confirmed;
5289 ieee80211_destroy_auth_data(sdata, cont_auth);
5292 /* prep auth_data so we don't go into idle on disassoc */
5293 ifmgd->auth_data = auth_data;
5295 /* If this is continuation of an ongoing SAE authentication exchange
5296 * (i.e., request to send SAE Confirm) and the peer has already
5297 * confirmed, mark authentication completed since we are about to send
5300 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5301 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5302 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5304 if (ifmgd->associated) {
5305 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5308 "disconnect from AP %pM for new auth to %pM\n",
5309 ifmgd->associated->bssid, req->bss->bssid);
5310 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5311 WLAN_REASON_UNSPECIFIED,
5314 ieee80211_report_disconnect(sdata, frame_buf,
5315 sizeof(frame_buf), true,
5316 WLAN_REASON_UNSPECIFIED);
5319 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5321 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5325 err = ieee80211_auth(sdata);
5327 sta_info_destroy_addr(sdata, req->bss->bssid);
5331 /* hold our own reference */
5332 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5336 eth_zero_addr(ifmgd->bssid);
5337 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5338 ifmgd->auth_data = NULL;
5339 mutex_lock(&sdata->local->mtx);
5340 ieee80211_vif_release_channel(sdata);
5341 mutex_unlock(&sdata->local->mtx);
5346 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5347 struct cfg80211_assoc_request *req)
5349 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ;
5350 struct ieee80211_local *local = sdata->local;
5351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5352 struct ieee80211_bss *bss = (void *)req->bss->priv;
5353 struct ieee80211_mgd_assoc_data *assoc_data;
5354 const struct cfg80211_bss_ies *beacon_ies;
5355 struct ieee80211_supported_band *sband;
5356 const u8 *ssidie, *ht_ie, *vht_ie;
5358 bool override = false;
5360 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5365 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5366 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) {
5371 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5372 assoc_data->ssid_len = ssidie[1];
5375 if (ifmgd->associated) {
5376 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5379 "disconnect from AP %pM for new assoc to %pM\n",
5380 ifmgd->associated->bssid, req->bss->bssid);
5381 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5382 WLAN_REASON_UNSPECIFIED,
5385 ieee80211_report_disconnect(sdata, frame_buf,
5386 sizeof(frame_buf), true,
5387 WLAN_REASON_UNSPECIFIED);
5390 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5395 if (ifmgd->assoc_data) {
5400 if (ifmgd->auth_data) {
5403 /* keep sta info, bssid if matching */
5404 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5405 ieee80211_destroy_auth_data(sdata, match);
5408 /* prepare assoc data */
5410 ifmgd->beacon_crc_valid = false;
5412 assoc_data->wmm = bss->wmm_used &&
5413 (local->hw.queues >= IEEE80211_NUM_ACS);
5416 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5417 * We still associate in non-HT mode (11a/b/g) if any one of these
5418 * ciphers is configured as pairwise.
5419 * We can set this to true for non-11n hardware, that'll be checked
5420 * separately along with the peer capabilities.
5422 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5423 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5424 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5425 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5426 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5427 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5428 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5429 netdev_info(sdata->dev,
5430 "disabling HT/VHT/HE due to WEP/TKIP use\n");
5434 sband = local->hw.wiphy->bands[req->bss->channel->band];
5436 /* also disable HT/VHT/HE if the AP doesn't use WMM */
5437 if (!bss->wmm_used) {
5438 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5439 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5440 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5441 netdev_info(sdata->dev,
5442 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
5445 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5446 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5447 sizeof(ifmgd->ht_capa_mask));
5449 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5450 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5451 sizeof(ifmgd->vht_capa_mask));
5453 if (req->ie && req->ie_len) {
5454 memcpy(assoc_data->ie, req->ie, req->ie_len);
5455 assoc_data->ie_len = req->ie_len;
5458 if (req->fils_kek) {
5459 /* should already be checked in cfg80211 - so warn */
5460 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5464 memcpy(assoc_data->fils_kek, req->fils_kek,
5466 assoc_data->fils_kek_len = req->fils_kek_len;
5469 if (req->fils_nonces)
5470 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5471 2 * FILS_NONCE_LEN);
5473 assoc_data->bss = req->bss;
5475 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5476 if (ifmgd->powersave)
5477 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5479 sdata->smps_mode = IEEE80211_SMPS_OFF;
5481 sdata->smps_mode = ifmgd->req_smps;
5483 assoc_data->capability = req->bss->capability;
5484 assoc_data->supp_rates = bss->supp_rates;
5485 assoc_data->supp_rates_len = bss->supp_rates_len;
5488 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5489 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5490 assoc_data->ap_ht_param =
5491 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5493 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5494 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5495 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5496 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5497 sizeof(struct ieee80211_vht_cap));
5499 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT |
5500 IEEE80211_STA_DISABLE_HE;
5503 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5504 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5505 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5506 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5508 if (bss->wmm_used && bss->uapsd_supported &&
5509 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5510 assoc_data->uapsd = true;
5511 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5513 assoc_data->uapsd = false;
5514 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5517 if (req->prev_bssid)
5518 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5521 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5522 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5524 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5525 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5528 if (req->flags & ASSOC_REQ_USE_RRM)
5529 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5531 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5533 if (req->crypto.control_port)
5534 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5536 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5538 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5539 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5540 sdata->control_port_over_nl80211 =
5541 req->crypto.control_port_over_nl80211;
5542 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
5543 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5546 /* kick off associate process */
5548 ifmgd->assoc_data = assoc_data;
5549 ifmgd->dtim_period = 0;
5550 ifmgd->have_beacon = false;
5552 /* override HT/VHT configuration only if the AP and we support it */
5553 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5554 struct ieee80211_sta_ht_cap sta_ht_cap;
5556 if (req->flags & ASSOC_REQ_DISABLE_HT)
5559 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5560 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5562 /* check for 40 MHz disable override */
5563 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5564 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5565 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5568 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5569 req->flags & ASSOC_REQ_DISABLE_VHT)
5573 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5574 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5575 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5576 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5579 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5580 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5582 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5587 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5589 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5592 * Wait up to one beacon interval ...
5593 * should this be more if we miss one?
5595 sdata_info(sdata, "waiting for beacon from %pM\n",
5597 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5598 assoc_data->timeout_started = true;
5599 assoc_data->need_beacon = true;
5600 } else if (beacon_ies) {
5601 const struct element *elem;
5604 ieee80211_get_dtim(beacon_ies, &dtim_count,
5605 &ifmgd->dtim_period);
5607 ifmgd->have_beacon = true;
5608 assoc_data->timeout = jiffies;
5609 assoc_data->timeout_started = true;
5611 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5612 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5613 sdata->vif.bss_conf.sync_device_ts =
5614 bss->device_ts_beacon;
5615 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5618 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5619 beacon_ies->data, beacon_ies->len);
5620 if (elem && elem->datalen >= 3)
5621 sdata->vif.bss_conf.profile_periodicity = elem->data[2];
5623 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
5624 beacon_ies->data, beacon_ies->len);
5625 if (elem && elem->datalen >= 11 &&
5626 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5627 sdata->vif.bss_conf.ema_ap = true;
5629 assoc_data->timeout = jiffies;
5630 assoc_data->timeout_started = true;
5634 run_again(sdata, assoc_data->timeout);
5636 if (bss->corrupt_data) {
5637 char *corrupt_type = "data";
5638 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5639 if (bss->corrupt_data &
5640 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5641 corrupt_type = "beacon and probe response";
5643 corrupt_type = "beacon";
5644 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5645 corrupt_type = "probe response";
5646 sdata_info(sdata, "associating with AP with corrupt %s\n",
5652 eth_zero_addr(ifmgd->bssid);
5653 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5654 ifmgd->assoc_data = NULL;
5660 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5661 struct cfg80211_deauth_request *req)
5663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5664 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5665 bool tx = !req->local_state_change;
5667 if (ifmgd->auth_data &&
5668 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5670 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5671 req->bssid, req->reason_code,
5672 ieee80211_get_reason_code_string(req->reason_code));
5674 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5675 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5676 IEEE80211_STYPE_DEAUTH,
5677 req->reason_code, tx,
5679 ieee80211_destroy_auth_data(sdata, false);
5680 ieee80211_report_disconnect(sdata, frame_buf,
5681 sizeof(frame_buf), true,
5687 if (ifmgd->assoc_data &&
5688 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5690 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5691 req->bssid, req->reason_code,
5692 ieee80211_get_reason_code_string(req->reason_code));
5694 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5695 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
5696 IEEE80211_STYPE_DEAUTH,
5697 req->reason_code, tx,
5699 ieee80211_destroy_assoc_data(sdata, false, true);
5700 ieee80211_report_disconnect(sdata, frame_buf,
5701 sizeof(frame_buf), true,
5706 if (ifmgd->associated &&
5707 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5709 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5710 req->bssid, req->reason_code,
5711 ieee80211_get_reason_code_string(req->reason_code));
5713 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5714 req->reason_code, tx, frame_buf);
5715 ieee80211_report_disconnect(sdata, frame_buf,
5716 sizeof(frame_buf), true,
5724 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5725 struct cfg80211_disassoc_request *req)
5727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5729 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5732 * cfg80211 should catch this ... but it's racy since
5733 * we can receive a disassoc frame, process it, hand it
5734 * to cfg80211 while that's in a locked section already
5735 * trying to tell us that the user wants to disconnect.
5737 if (ifmgd->associated != req->bss)
5741 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5742 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5744 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5745 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5746 req->reason_code, !req->local_state_change,
5749 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5755 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5760 * Make sure some work items will not run after this,
5761 * they will not do anything but might not have been
5762 * cancelled when disconnecting.
5764 cancel_work_sync(&ifmgd->monitor_work);
5765 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5766 cancel_work_sync(&ifmgd->request_smps_work);
5767 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5768 cancel_work_sync(&ifmgd->chswitch_work);
5769 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5772 if (ifmgd->assoc_data) {
5773 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5774 ieee80211_destroy_assoc_data(sdata, false, false);
5775 cfg80211_assoc_timeout(sdata->dev, bss);
5777 if (ifmgd->auth_data)
5778 ieee80211_destroy_auth_data(sdata, false);
5779 spin_lock_bh(&ifmgd->teardown_lock);
5780 if (ifmgd->teardown_skb) {
5781 kfree_skb(ifmgd->teardown_skb);
5782 ifmgd->teardown_skb = NULL;
5783 ifmgd->orig_teardown_skb = NULL;
5785 kfree(ifmgd->assoc_req_ies);
5786 ifmgd->assoc_req_ies = NULL;
5787 ifmgd->assoc_req_ies_len = 0;
5788 spin_unlock_bh(&ifmgd->teardown_lock);
5789 del_timer_sync(&ifmgd->timer);
5790 sdata_unlock(sdata);
5793 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5794 enum nl80211_cqm_rssi_threshold_event rssi_event,
5798 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5800 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5802 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5804 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5806 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5808 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5810 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5812 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5814 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);