2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
10 * Copyright (C) 2018 - 2019 Intel Corporation
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
17 #include <linux/delay.h>
18 #include <linux/if_ether.h>
19 #include <linux/skbuff.h>
20 #include <linux/if_arp.h>
21 #include <linux/etherdevice.h>
22 #include <linux/moduleparam.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/crc32.h>
25 #include <linux/slab.h>
26 #include <linux/export.h>
27 #include <net/mac80211.h>
28 #include <asm/unaligned.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
34 #include "fils_aead.h"
36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2)
40 #define IEEE80211_AUTH_MAX_TRIES 3
41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
42 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
43 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
44 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
45 #define IEEE80211_ASSOC_MAX_TRIES 3
47 static int max_nullfunc_tries = 2;
48 module_param(max_nullfunc_tries, int, 0644);
49 MODULE_PARM_DESC(max_nullfunc_tries,
50 "Maximum nullfunc tx tries before disconnecting (reason 4).");
52 static int max_probe_tries = 5;
53 module_param(max_probe_tries, int, 0644);
54 MODULE_PARM_DESC(max_probe_tries,
55 "Maximum probe tries before disconnecting (reason 4).");
58 * Beacon loss timeout is calculated as N frames times the
59 * advertised beacon interval. This may need to be somewhat
60 * higher than what hardware might detect to account for
61 * delays in the host processing frames. But since we also
62 * probe on beacon miss before declaring the connection lost
63 * default to what we want.
65 static int beacon_loss_count = 7;
66 module_param(beacon_loss_count, int, 0644);
67 MODULE_PARM_DESC(beacon_loss_count,
68 "Number of beacon intervals before we decide beacon was lost.");
71 * Time the connection can be idle before we probe
72 * it to see if we can still talk to the AP.
74 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
76 * Time we wait for a probe response after sending
77 * a probe request because of beacon loss or for
78 * checking the connection still works.
80 static int probe_wait_ms = 500;
81 module_param(probe_wait_ms, int, 0644);
82 MODULE_PARM_DESC(probe_wait_ms,
83 "Maximum time(ms) to wait for probe response"
84 " before disconnecting (reason 4).");
87 * How many Beacon frames need to have been used in average signal strength
88 * before starting to indicate signal change events.
90 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
93 * We can have multiple work items (and connection probing)
94 * scheduling this timer, but we need to take care to only
95 * reschedule it when it should fire _earlier_ than it was
96 * asked for before, or if it's not pending right now. This
97 * function ensures that. Note that it then is required to
98 * run this function for all timeouts after the first one
99 * has happened -- the work that runs from this timer will
102 static void run_again(struct ieee80211_sub_if_data *sdata,
103 unsigned long timeout)
105 sdata_assert_lock(sdata);
107 if (!timer_pending(&sdata->u.mgd.timer) ||
108 time_before(timeout, sdata->u.mgd.timer.expires))
109 mod_timer(&sdata->u.mgd.timer, timeout);
112 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
114 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
117 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
120 mod_timer(&sdata->u.mgd.bcn_mon_timer,
121 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
124 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
128 if (unlikely(!ifmgd->associated))
131 if (ifmgd->probe_send_count)
132 ifmgd->probe_send_count = 0;
134 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
137 mod_timer(&ifmgd->conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
141 static int ecw2cw(int ecw)
143 return (1 << ecw) - 1;
147 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
148 struct ieee80211_supported_band *sband,
149 struct ieee80211_channel *channel,
150 const struct ieee80211_ht_operation *ht_oper,
151 const struct ieee80211_vht_operation *vht_oper,
152 const struct ieee80211_he_operation *he_oper,
153 struct cfg80211_chan_def *chandef, bool tracking)
155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
156 struct cfg80211_chan_def vht_chandef;
157 struct ieee80211_sta_ht_cap sta_ht_cap;
160 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
161 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
163 chandef->chan = channel;
164 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
165 chandef->center_freq1 = channel->center_freq;
166 chandef->center_freq2 = 0;
168 if (!ht_oper || !sta_ht_cap.ht_supported) {
169 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
173 chandef->width = NL80211_CHAN_WIDTH_20;
175 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
177 /* check that channel matches the right operating channel */
178 if (!tracking && channel->center_freq != ht_cfreq) {
180 * It's possible that some APs are confused here;
181 * Netgear WNDR3700 sometimes reports 4 higher than
182 * the actual channel in association responses, but
183 * since we look at probe response/beacon data here
187 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
188 channel->center_freq, ht_cfreq,
189 ht_oper->primary_chan, channel->band);
190 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
194 /* check 40 MHz support, if we have it */
195 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
196 ieee80211_chandef_ht_oper(ht_oper, chandef);
198 /* 40 MHz (and 80 MHz) must be supported for VHT */
199 ret = IEEE80211_STA_DISABLE_VHT;
200 /* also mark 40 MHz disabled */
201 ret |= IEEE80211_STA_DISABLE_40MHZ;
205 if (!vht_oper || !sband->vht_cap.vht_supported) {
206 ret = IEEE80211_STA_DISABLE_VHT;
210 vht_chandef = *chandef;
211 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
212 (le32_to_cpu(he_oper->he_oper_params) &
213 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
214 struct ieee80211_vht_operation he_oper_vht_cap;
217 * Set only first 3 bytes (other 2 aren't used in
218 * ieee80211_chandef_vht_oper() anyway)
220 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
221 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
223 if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
224 &he_oper_vht_cap, ht_oper,
226 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
228 "HE AP VHT information is invalid, disable HE\n");
229 ret = IEEE80211_STA_DISABLE_HE;
232 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
233 ht_oper, &vht_chandef)) {
234 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
236 "AP VHT information is invalid, disable VHT\n");
237 ret = IEEE80211_STA_DISABLE_VHT;
241 if (!cfg80211_chandef_valid(&vht_chandef)) {
242 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
244 "AP VHT information is invalid, disable VHT\n");
245 ret = IEEE80211_STA_DISABLE_VHT;
249 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
254 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
255 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
257 "AP VHT information doesn't match HT, disable VHT\n");
258 ret = IEEE80211_STA_DISABLE_VHT;
262 *chandef = vht_chandef;
268 * When tracking the current AP, don't do any further checks if the
269 * new chandef is identical to the one we're currently using for the
270 * connection. This keeps us from playing ping-pong with regulatory,
271 * without it the following can happen (for example):
272 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
273 * - AP advertises regdom US
274 * - CRDA loads regdom US with 80 MHz prohibited (old database)
275 * - the code below detects an unsupported channel, downgrades, and
276 * we disconnect from the AP in the caller
277 * - disconnect causes CRDA to reload world regdomain and the game
279 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
281 * It seems possible that there are still scenarios with CSA or real
282 * bandwidth changes where a this could happen, but those cases are
283 * less common and wouldn't completely prevent using the AP.
286 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
289 /* don't print the message below for VHT mismatch if VHT is disabled */
290 if (ret & IEEE80211_STA_DISABLE_VHT)
291 vht_chandef = *chandef;
294 * Ignore the DISABLED flag when we're already connected and only
295 * tracking the APs beacon for bandwidth changes - otherwise we
296 * might get disconnected here if we connect to an AP, update our
297 * regulatory information based on the AP's country IE and the
298 * information we have is wrong/outdated and disables the channel
299 * that we're actually using for the connection to the AP.
301 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
303 IEEE80211_CHAN_DISABLED)) {
304 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
305 ret = IEEE80211_STA_DISABLE_HT |
306 IEEE80211_STA_DISABLE_VHT;
310 ret |= ieee80211_chandef_downgrade(chandef);
313 if (chandef->width != vht_chandef.width && !tracking)
315 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
317 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
321 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
322 struct sta_info *sta,
323 const struct ieee80211_ht_cap *ht_cap,
324 const struct ieee80211_ht_operation *ht_oper,
325 const struct ieee80211_vht_operation *vht_oper,
326 const struct ieee80211_he_operation *he_oper,
327 const u8 *bssid, u32 *changed)
329 struct ieee80211_local *local = sdata->local;
330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
331 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
332 struct ieee80211_supported_band *sband =
333 local->hw.wiphy->bands[chan->band];
334 struct cfg80211_chan_def chandef;
337 enum ieee80211_sta_rx_bandwidth new_sta_bw;
340 /* if HT was/is disabled, don't track any bandwidth changes */
341 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
344 /* don't check VHT if we associated as non-VHT station */
345 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
348 /* don't check HE if we associated as non-HE station */
349 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
350 !ieee80211_get_he_sta_cap(sband))
353 if (WARN_ON_ONCE(!sta))
357 * if bss configuration changed store the new one -
358 * this may be applicable even if channel is identical
360 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
361 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
362 *changed |= BSS_CHANGED_HT;
363 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
366 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
367 flags = ieee80211_determine_chantype(sdata, sband, chan,
368 ht_oper, vht_oper, he_oper,
372 * Downgrade the new channel if we associated with restricted
373 * capabilities. For example, if we associated as a 20 MHz STA
374 * to a 40 MHz AP (due to regulatory, capabilities or config
375 * reasons) then switching to a 40 MHz channel now won't do us
376 * any good -- we couldn't use it with the AP.
378 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
379 chandef.width == NL80211_CHAN_WIDTH_80P80)
380 flags |= ieee80211_chandef_downgrade(&chandef);
381 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
382 chandef.width == NL80211_CHAN_WIDTH_160)
383 flags |= ieee80211_chandef_downgrade(&chandef);
384 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
385 chandef.width > NL80211_CHAN_WIDTH_20)
386 flags |= ieee80211_chandef_downgrade(&chandef);
388 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
392 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
393 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
394 chandef.center_freq1, chandef.center_freq2);
396 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
397 IEEE80211_STA_DISABLE_VHT |
398 IEEE80211_STA_DISABLE_40MHZ |
399 IEEE80211_STA_DISABLE_80P80MHZ |
400 IEEE80211_STA_DISABLE_160MHZ)) ||
401 !cfg80211_chandef_valid(&chandef)) {
403 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
408 switch (chandef.width) {
409 case NL80211_CHAN_WIDTH_20_NOHT:
410 case NL80211_CHAN_WIDTH_20:
411 new_sta_bw = IEEE80211_STA_RX_BW_20;
413 case NL80211_CHAN_WIDTH_40:
414 new_sta_bw = IEEE80211_STA_RX_BW_40;
416 case NL80211_CHAN_WIDTH_80:
417 new_sta_bw = IEEE80211_STA_RX_BW_80;
419 case NL80211_CHAN_WIDTH_80P80:
420 case NL80211_CHAN_WIDTH_160:
421 new_sta_bw = IEEE80211_STA_RX_BW_160;
427 if (new_sta_bw > sta->cur_max_bandwidth)
428 new_sta_bw = sta->cur_max_bandwidth;
430 if (new_sta_bw < sta->sta.bandwidth) {
431 sta->sta.bandwidth = new_sta_bw;
432 rate_control_rate_update(local, sband, sta,
433 IEEE80211_RC_BW_CHANGED);
436 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
439 "AP %pM changed bandwidth to incompatible one - disconnect\n",
444 if (new_sta_bw > sta->sta.bandwidth) {
445 sta->sta.bandwidth = new_sta_bw;
446 rate_control_rate_update(local, sband, sta,
447 IEEE80211_RC_BW_CHANGED);
453 /* frame sending functions */
455 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
456 struct sk_buff *skb, u8 ap_ht_param,
457 struct ieee80211_supported_band *sband,
458 struct ieee80211_channel *channel,
459 enum ieee80211_smps_mode smps)
462 u32 flags = channel->flags;
464 struct ieee80211_sta_ht_cap ht_cap;
466 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
468 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
469 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
471 /* determine capability flags */
474 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
475 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
476 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
477 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
478 cap &= ~IEEE80211_HT_CAP_SGI_40;
481 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
482 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
483 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
484 cap &= ~IEEE80211_HT_CAP_SGI_40;
490 * If 40 MHz was disabled associate as though we weren't
491 * capable of 40 MHz -- some broken APs will never fall
492 * back to trying to transmit in 20 MHz.
494 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
499 /* set SM PS mode properly */
500 cap &= ~IEEE80211_HT_CAP_SM_PS;
502 case IEEE80211_SMPS_AUTOMATIC:
503 case IEEE80211_SMPS_NUM_MODES:
506 case IEEE80211_SMPS_OFF:
507 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
508 IEEE80211_HT_CAP_SM_PS_SHIFT;
510 case IEEE80211_SMPS_STATIC:
511 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
512 IEEE80211_HT_CAP_SM_PS_SHIFT;
514 case IEEE80211_SMPS_DYNAMIC:
515 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
516 IEEE80211_HT_CAP_SM_PS_SHIFT;
520 /* reserve and fill IE */
521 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
522 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
525 /* This function determines vht capability flags for the association
527 * Note - the function may set the owner of the MU-MIMO capability
529 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
531 struct ieee80211_supported_band *sband,
532 struct ieee80211_vht_cap *ap_vht_cap)
534 struct ieee80211_local *local = sdata->local;
537 struct ieee80211_sta_vht_cap vht_cap;
538 u32 mask, ap_bf_sts, our_bf_sts;
540 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
542 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
543 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
545 /* determine capability flags */
548 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
549 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
551 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
552 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
553 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
554 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
557 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
558 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
559 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
563 * Some APs apparently get confused if our capabilities are better
564 * than theirs, so restrict what we advertise in the assoc request.
566 if (!(ap_vht_cap->vht_cap_info &
567 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
568 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
569 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
570 else if (!(ap_vht_cap->vht_cap_info &
571 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
572 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
575 * If some other vif is using the MU-MIMO capablity we cannot associate
576 * using MU-MIMO - this will lead to contradictions in the group-id
578 * Ownership is defined since association request, in order to avoid
579 * simultaneous associations with MU-MIMO.
581 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
582 bool disable_mu_mimo = false;
583 struct ieee80211_sub_if_data *other;
585 list_for_each_entry_rcu(other, &local->interfaces, list) {
586 if (other->vif.mu_mimo_owner) {
587 disable_mu_mimo = true;
592 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
594 sdata->vif.mu_mimo_owner = true;
597 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
599 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
600 our_bf_sts = cap & mask;
602 if (ap_bf_sts < our_bf_sts) {
607 /* reserve and fill IE */
608 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
609 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
612 /* This function determines HE capability flags for the association
615 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
617 struct ieee80211_supported_band *sband)
620 const struct ieee80211_sta_he_cap *he_cap = NULL;
623 he_cap = ieee80211_get_he_sta_cap(sband);
628 * TODO: the 1 added is because this temporarily is under the EXTENSION
629 * IE. Get rid of it when it moves.
632 2 + 1 + sizeof(he_cap->he_cap_elem) +
633 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
634 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
635 he_cap->he_cap_elem.phy_cap_info);
636 pos = skb_put(skb, he_cap_size);
637 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
640 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
642 struct ieee80211_local *local = sdata->local;
643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
644 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
646 struct ieee80211_mgmt *mgmt;
647 u8 *pos, qos_info, *ie_start;
648 size_t offset = 0, noffset;
649 int i, count, rates_len, supp_rates_len, shift;
651 struct ieee80211_supported_band *sband;
652 struct ieee80211_chanctx_conf *chanctx_conf;
653 struct ieee80211_channel *chan;
656 sdata_assert_lock(sdata);
659 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
660 if (WARN_ON(!chanctx_conf)) {
664 chan = chanctx_conf->def.chan;
666 sband = local->hw.wiphy->bands[chan->band];
667 shift = ieee80211_vif_get_shift(&sdata->vif);
669 if (assoc_data->supp_rates_len) {
671 * Get all rates supported by the device and the AP as
672 * some APs don't like getting a superset of their rates
673 * in the association request (e.g. D-Link DAP 1353 in
676 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
677 assoc_data->supp_rates,
678 assoc_data->supp_rates_len,
682 * In case AP not provide any supported rates information
683 * before association, we send information element(s) with
684 * all rates that we support.
687 for (i = 0; i < sband->n_bitrates; i++) {
693 skb = alloc_skb(local->hw.extra_tx_headroom +
694 sizeof(*mgmt) + /* bit too much but doesn't matter */
695 2 + assoc_data->ssid_len + /* SSID */
696 4 + rates_len + /* (extended) rates */
697 4 + /* power capability */
698 2 + 2 * sband->n_channels + /* supported channels */
699 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
700 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
701 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
702 sizeof(struct ieee80211_he_mcs_nss_supp) +
703 IEEE80211_HE_PPE_THRES_MAX_LEN +
704 assoc_data->ie_len + /* extra IEs */
705 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
711 skb_reserve(skb, local->hw.extra_tx_headroom);
713 capab = WLAN_CAPABILITY_ESS;
715 if (sband->band == NL80211_BAND_2GHZ) {
716 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
717 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
720 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
721 capab |= WLAN_CAPABILITY_PRIVACY;
723 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
724 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
725 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
727 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
728 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
730 mgmt = skb_put_zero(skb, 24);
731 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
732 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
733 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
735 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
737 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
738 IEEE80211_STYPE_REASSOC_REQ);
739 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
740 mgmt->u.reassoc_req.listen_interval =
741 cpu_to_le16(local->hw.conf.listen_interval);
742 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
746 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
747 IEEE80211_STYPE_ASSOC_REQ);
748 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
749 mgmt->u.assoc_req.listen_interval =
750 cpu_to_le16(local->hw.conf.listen_interval);
754 pos = skb_put(skb, 2 + assoc_data->ssid_len);
756 *pos++ = WLAN_EID_SSID;
757 *pos++ = assoc_data->ssid_len;
758 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
760 /* add all rates which were marked to be used above */
761 supp_rates_len = rates_len;
762 if (supp_rates_len > 8)
765 pos = skb_put(skb, supp_rates_len + 2);
766 *pos++ = WLAN_EID_SUPP_RATES;
767 *pos++ = supp_rates_len;
770 for (i = 0; i < sband->n_bitrates; i++) {
771 if (BIT(i) & rates) {
772 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
780 if (rates_len > count) {
781 pos = skb_put(skb, rates_len - count + 2);
782 *pos++ = WLAN_EID_EXT_SUPP_RATES;
783 *pos++ = rates_len - count;
785 for (i++; i < sband->n_bitrates; i++) {
786 if (BIT(i) & rates) {
788 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
795 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
796 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
797 pos = skb_put(skb, 4);
798 *pos++ = WLAN_EID_PWR_CAPABILITY;
800 *pos++ = 0; /* min tx power */
802 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
805 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
806 /* TODO: get this in reg domain format */
807 pos = skb_put(skb, 2 * sband->n_channels + 2);
808 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
809 *pos++ = 2 * sband->n_channels;
810 for (i = 0; i < sband->n_channels; i++) {
811 *pos++ = ieee80211_frequency_to_channel(
812 sband->channels[i].center_freq);
813 *pos++ = 1; /* one channel in the subband*/
817 /* Set MBSSID support for HE AP if needed */
818 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
819 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) {
820 struct element *elem;
822 /* we know it's writable, cast away the const */
823 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
827 /* We can probably assume both always true */
828 if (elem && elem->datalen >= 3)
829 elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
832 /* if present, add any custom IEs that go before HT */
833 if (assoc_data->ie_len) {
834 static const u8 before_ht[] = {
837 WLAN_EID_EXT_SUPP_RATES,
838 WLAN_EID_PWR_CAPABILITY,
839 WLAN_EID_SUPPORTED_CHANNELS,
842 WLAN_EID_RRM_ENABLED_CAPABILITIES,
843 WLAN_EID_MOBILITY_DOMAIN,
844 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
845 WLAN_EID_RIC_DATA, /* reassoc only */
846 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
848 static const u8 after_ric[] = {
849 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
850 WLAN_EID_HT_CAPABILITY,
851 WLAN_EID_BSS_COEX_2040,
852 /* luckily this is almost always there */
853 WLAN_EID_EXT_CAPABILITY,
854 WLAN_EID_QOS_TRAFFIC_CAPA,
855 WLAN_EID_TIM_BCAST_REQ,
856 WLAN_EID_INTERWORKING,
857 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
858 WLAN_EID_VHT_CAPABILITY,
859 WLAN_EID_OPMODE_NOTIF,
862 noffset = ieee80211_ie_split_ric(assoc_data->ie,
865 ARRAY_SIZE(before_ht),
867 ARRAY_SIZE(after_ric),
869 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
873 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
874 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
875 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
877 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
878 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
879 sband, chan, sdata->smps_mode);
881 /* if present, add any custom IEs that go before VHT */
882 if (assoc_data->ie_len) {
883 static const u8 before_vht[] = {
885 * no need to list the ones split off before HT
888 WLAN_EID_BSS_COEX_2040,
889 WLAN_EID_EXT_CAPABILITY,
890 WLAN_EID_QOS_TRAFFIC_CAPA,
891 WLAN_EID_TIM_BCAST_REQ,
892 WLAN_EID_INTERWORKING,
893 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
896 /* RIC already taken above, so no need to handle here anymore */
897 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
898 before_vht, ARRAY_SIZE(before_vht),
900 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
904 /* if present, add any custom IEs that go before HE */
905 if (assoc_data->ie_len) {
906 static const u8 before_he[] = {
908 * no need to list the ones split off before VHT
911 WLAN_EID_OPMODE_NOTIF,
912 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
914 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
915 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
916 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
917 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
918 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
919 /* TODO: add 11ah/11aj/11ak elements */
922 /* RIC already taken above, so no need to handle here anymore */
923 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
924 before_he, ARRAY_SIZE(before_he),
926 pos = skb_put(skb, noffset - offset);
927 memcpy(pos, assoc_data->ie + offset, noffset - offset);
931 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
932 ieee80211_add_vht_ie(sdata, skb, sband,
933 &assoc_data->ap_vht_cap);
936 * If AP doesn't support HT, mark HE as disabled.
937 * If on the 5GHz band, make sure it supports VHT.
939 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
940 (sband->band == NL80211_BAND_5GHZ &&
941 ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
942 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
944 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
945 ieee80211_add_he_ie(sdata, skb, sband);
947 /* if present, add any custom non-vendor IEs that go after HE */
948 if (assoc_data->ie_len) {
949 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
952 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
956 if (assoc_data->wmm) {
957 if (assoc_data->uapsd) {
958 qos_info = ifmgd->uapsd_queues;
959 qos_info |= (ifmgd->uapsd_max_sp_len <<
960 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
965 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
968 /* add any remaining custom (i.e. vendor specific here) IEs */
969 if (assoc_data->ie_len) {
970 noffset = assoc_data->ie_len;
971 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
974 if (assoc_data->fils_kek_len &&
975 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
980 pos = skb_tail_pointer(skb);
981 kfree(ifmgd->assoc_req_ies);
982 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
983 ifmgd->assoc_req_ies_len = pos - ie_start;
985 drv_mgd_prepare_tx(local, sdata, 0);
987 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
988 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
989 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
990 IEEE80211_TX_INTFL_MLME_CONN_TX;
991 ieee80211_tx_skb(sdata, skb);
994 void ieee80211_send_pspoll(struct ieee80211_local *local,
995 struct ieee80211_sub_if_data *sdata)
997 struct ieee80211_pspoll *pspoll;
1000 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1004 pspoll = (struct ieee80211_pspoll *) skb->data;
1005 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1007 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1008 ieee80211_tx_skb(sdata, skb);
1011 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1012 struct ieee80211_sub_if_data *sdata,
1015 struct sk_buff *skb;
1016 struct ieee80211_hdr_3addr *nullfunc;
1017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1019 /* Don't send NDPs when STA is connected HE */
1020 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1021 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1024 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1025 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1029 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1031 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1033 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1034 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1036 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1037 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1039 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1040 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1042 ieee80211_tx_skb(sdata, skb);
1045 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1046 struct ieee80211_sub_if_data *sdata)
1048 struct sk_buff *skb;
1049 struct ieee80211_hdr *nullfunc;
1052 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1055 /* Don't send NDPs when connected HE */
1056 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1059 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1063 skb_reserve(skb, local->hw.extra_tx_headroom);
1065 nullfunc = skb_put_zero(skb, 30);
1066 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1067 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1068 nullfunc->frame_control = fc;
1069 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1070 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1071 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1072 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1074 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1075 ieee80211_tx_skb(sdata, skb);
1078 /* spectrum management related things */
1079 static void ieee80211_chswitch_work(struct work_struct *work)
1081 struct ieee80211_sub_if_data *sdata =
1082 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1083 struct ieee80211_local *local = sdata->local;
1084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1087 if (!ieee80211_sdata_running(sdata))
1091 mutex_lock(&local->mtx);
1092 mutex_lock(&local->chanctx_mtx);
1094 if (!ifmgd->associated)
1097 if (!sdata->vif.csa_active)
1101 * using reservation isn't immediate as it may be deferred until later
1102 * with multi-vif. once reservation is complete it will re-schedule the
1103 * work with no reserved_chanctx so verify chandef to check if it
1104 * completed successfully
1107 if (sdata->reserved_chanctx) {
1108 struct ieee80211_supported_band *sband = NULL;
1109 struct sta_info *mgd_sta = NULL;
1110 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1113 * with multi-vif csa driver may call ieee80211_csa_finish()
1114 * many times while waiting for other interfaces to use their
1117 if (sdata->reserved_ready)
1120 if (sdata->vif.bss_conf.chandef.width !=
1121 sdata->csa_chandef.width) {
1123 * For managed interface, we need to also update the AP
1124 * station bandwidth and align the rate scale algorithm
1125 * on the bandwidth change. Here we only consider the
1126 * bandwidth of the new channel definition (as channel
1127 * switch flow does not have the full HT/VHT/HE
1128 * information), assuming that if additional changes are
1129 * required they would be done as part of the processing
1130 * of the next beacon from the AP.
1132 switch (sdata->csa_chandef.width) {
1133 case NL80211_CHAN_WIDTH_20_NOHT:
1134 case NL80211_CHAN_WIDTH_20:
1136 bw = IEEE80211_STA_RX_BW_20;
1138 case NL80211_CHAN_WIDTH_40:
1139 bw = IEEE80211_STA_RX_BW_40;
1141 case NL80211_CHAN_WIDTH_80:
1142 bw = IEEE80211_STA_RX_BW_80;
1144 case NL80211_CHAN_WIDTH_80P80:
1145 case NL80211_CHAN_WIDTH_160:
1146 bw = IEEE80211_STA_RX_BW_160;
1150 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1152 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1155 if (sdata->vif.bss_conf.chandef.width >
1156 sdata->csa_chandef.width) {
1157 mgd_sta->sta.bandwidth = bw;
1158 rate_control_rate_update(local, sband, mgd_sta,
1159 IEEE80211_RC_BW_CHANGED);
1162 ret = ieee80211_vif_use_reserved_context(sdata);
1165 "failed to use reserved channel context, disconnecting (err=%d)\n",
1167 ieee80211_queue_work(&sdata->local->hw,
1168 &ifmgd->csa_connection_drop_work);
1172 if (sdata->vif.bss_conf.chandef.width <
1173 sdata->csa_chandef.width) {
1174 mgd_sta->sta.bandwidth = bw;
1175 rate_control_rate_update(local, sband, mgd_sta,
1176 IEEE80211_RC_BW_CHANGED);
1182 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1183 &sdata->csa_chandef)) {
1185 "failed to finalize channel switch, disconnecting\n");
1186 ieee80211_queue_work(&sdata->local->hw,
1187 &ifmgd->csa_connection_drop_work);
1191 ifmgd->csa_waiting_bcn = true;
1193 ieee80211_sta_reset_beacon_monitor(sdata);
1194 ieee80211_sta_reset_conn_monitor(sdata);
1197 mutex_unlock(&local->chanctx_mtx);
1198 mutex_unlock(&local->mtx);
1199 sdata_unlock(sdata);
1202 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1204 struct ieee80211_local *local = sdata->local;
1205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1208 sdata_assert_lock(sdata);
1210 WARN_ON(!sdata->vif.csa_active);
1212 if (sdata->csa_block_tx) {
1213 ieee80211_wake_vif_queues(local, sdata,
1214 IEEE80211_QUEUE_STOP_REASON_CSA);
1215 sdata->csa_block_tx = false;
1218 sdata->vif.csa_active = false;
1219 ifmgd->csa_waiting_bcn = false;
1221 ret = drv_post_channel_switch(sdata);
1224 "driver post channel switch failed, disconnecting\n");
1225 ieee80211_queue_work(&local->hw,
1226 &ifmgd->csa_connection_drop_work);
1230 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1233 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1235 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1238 trace_api_chswitch_done(sdata, success);
1241 "driver channel switch failed, disconnecting\n");
1242 ieee80211_queue_work(&sdata->local->hw,
1243 &ifmgd->csa_connection_drop_work);
1245 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1248 EXPORT_SYMBOL(ieee80211_chswitch_done);
1250 static void ieee80211_chswitch_timer(struct timer_list *t)
1252 struct ieee80211_sub_if_data *sdata =
1253 from_timer(sdata, t, u.mgd.chswitch_timer);
1255 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1259 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1261 struct ieee80211_local *local = sdata->local;
1263 if (!local->ops->abort_channel_switch)
1266 mutex_lock(&local->mtx);
1268 mutex_lock(&local->chanctx_mtx);
1269 ieee80211_vif_unreserve_chanctx(sdata);
1270 mutex_unlock(&local->chanctx_mtx);
1272 if (sdata->csa_block_tx)
1273 ieee80211_wake_vif_queues(local, sdata,
1274 IEEE80211_QUEUE_STOP_REASON_CSA);
1276 sdata->csa_block_tx = false;
1277 sdata->vif.csa_active = false;
1279 mutex_unlock(&local->mtx);
1281 drv_abort_channel_switch(sdata);
1285 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1286 u64 timestamp, u32 device_timestamp,
1287 struct ieee802_11_elems *elems,
1290 struct ieee80211_local *local = sdata->local;
1291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1292 struct cfg80211_bss *cbss = ifmgd->associated;
1293 struct ieee80211_chanctx_conf *conf;
1294 struct ieee80211_chanctx *chanctx;
1295 enum nl80211_band current_band;
1296 struct ieee80211_csa_ie csa_ie;
1297 struct ieee80211_channel_switch ch_switch;
1300 sdata_assert_lock(sdata);
1305 if (local->scanning)
1308 current_band = cbss->channel->band;
1309 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1311 ifmgd->associated->bssid, &csa_ie);
1314 ch_switch.timestamp = timestamp;
1315 ch_switch.device_timestamp = device_timestamp;
1316 ch_switch.block_tx = beacon ? csa_ie.mode : 0;
1317 ch_switch.chandef = csa_ie.chandef;
1318 ch_switch.count = csa_ie.count;
1319 ch_switch.delay = csa_ie.max_switch_time;
1323 ieee80211_queue_work(&local->hw,
1324 &ifmgd->csa_connection_drop_work);
1328 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1330 ieee80211_sta_abort_chanswitch(sdata);
1332 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1334 } else if (sdata->vif.csa_active || res) {
1335 /* disregard subsequent announcements if already processing */
1339 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1340 IEEE80211_CHAN_DISABLED)) {
1342 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1343 ifmgd->associated->bssid,
1344 csa_ie.chandef.chan->center_freq,
1345 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1346 csa_ie.chandef.center_freq2);
1347 ieee80211_queue_work(&local->hw,
1348 &ifmgd->csa_connection_drop_work);
1352 if (cfg80211_chandef_identical(&csa_ie.chandef,
1353 &sdata->vif.bss_conf.chandef) &&
1354 (!csa_ie.mode || !beacon)) {
1355 if (ifmgd->csa_ignored_same_chan)
1358 "AP %pM tries to chanswitch to same channel, ignore\n",
1359 ifmgd->associated->bssid);
1360 ifmgd->csa_ignored_same_chan = true;
1365 * Drop all TDLS peers - either we disconnect or move to a different
1366 * channel from this point on. There's no telling what our peer will do.
1367 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1368 * have an incompatible wider chandef.
1370 ieee80211_teardown_tdls_peers(sdata);
1372 mutex_lock(&local->mtx);
1373 mutex_lock(&local->chanctx_mtx);
1374 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1375 lockdep_is_held(&local->chanctx_mtx));
1378 "no channel context assigned to vif?, disconnecting\n");
1379 goto drop_connection;
1382 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1384 if (local->use_chanctx &&
1385 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1387 "driver doesn't support chan-switch with channel contexts\n");
1388 goto drop_connection;
1391 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1393 "preparing for channel switch failed, disconnecting\n");
1394 goto drop_connection;
1397 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1398 chanctx->mode, false);
1401 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1403 goto drop_connection;
1405 mutex_unlock(&local->chanctx_mtx);
1407 sdata->vif.csa_active = true;
1408 sdata->csa_chandef = csa_ie.chandef;
1409 sdata->csa_block_tx = ch_switch.block_tx;
1410 ifmgd->csa_ignored_same_chan = false;
1412 if (sdata->csa_block_tx)
1413 ieee80211_stop_vif_queues(local, sdata,
1414 IEEE80211_QUEUE_STOP_REASON_CSA);
1415 mutex_unlock(&local->mtx);
1417 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1420 if (local->ops->channel_switch) {
1421 /* use driver's channel switch callback */
1422 drv_channel_switch(local, sdata, &ch_switch);
1426 /* channel switch handled in software */
1427 if (csa_ie.count <= 1)
1428 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1430 mod_timer(&ifmgd->chswitch_timer,
1431 TU_TO_EXP_TIME((csa_ie.count - 1) *
1432 cbss->beacon_interval));
1436 * This is just so that the disconnect flow will know that
1437 * we were trying to switch channel and failed. In case the
1438 * mode is 1 (we are not allowed to Tx), we will know not to
1439 * send a deauthentication frame. Those two fields will be
1440 * reset when the disconnection worker runs.
1442 sdata->vif.csa_active = true;
1443 sdata->csa_block_tx = ch_switch.block_tx;
1445 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1446 mutex_unlock(&local->chanctx_mtx);
1447 mutex_unlock(&local->mtx);
1451 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1452 struct ieee80211_channel *channel,
1453 const u8 *country_ie, u8 country_ie_len,
1454 const u8 *pwr_constr_elem,
1455 int *chan_pwr, int *pwr_reduction)
1457 struct ieee80211_country_ie_triplet *triplet;
1458 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1459 int i, chan_increment;
1460 bool have_chan_pwr = false;
1463 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1466 triplet = (void *)(country_ie + 3);
1467 country_ie_len -= 3;
1469 switch (channel->band) {
1473 case NL80211_BAND_2GHZ:
1474 case NL80211_BAND_60GHZ:
1477 case NL80211_BAND_5GHZ:
1483 while (country_ie_len >= 3) {
1484 u8 first_channel = triplet->chans.first_channel;
1486 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1489 for (i = 0; i < triplet->chans.num_channels; i++) {
1490 if (first_channel + i * chan_increment == chan) {
1491 have_chan_pwr = true;
1492 *chan_pwr = triplet->chans.max_power;
1501 country_ie_len -= 3;
1504 if (have_chan_pwr && pwr_constr_elem)
1505 *pwr_reduction = *pwr_constr_elem;
1509 return have_chan_pwr;
1512 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1513 struct ieee80211_channel *channel,
1514 const u8 *cisco_dtpc_ie,
1517 /* From practical testing, the first data byte of the DTPC element
1518 * seems to contain the requested dBm level, and the CLI on Cisco
1519 * APs clearly state the range is -127 to 127 dBm, which indicates
1520 * a signed byte, although it seemingly never actually goes negative.
1521 * The other byte seems to always be zero.
1523 *pwr_level = (__s8)cisco_dtpc_ie[4];
1526 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1527 struct ieee80211_channel *channel,
1528 struct ieee80211_mgmt *mgmt,
1529 const u8 *country_ie, u8 country_ie_len,
1530 const u8 *pwr_constr_ie,
1531 const u8 *cisco_dtpc_ie)
1533 bool has_80211h_pwr = false, has_cisco_pwr = false;
1534 int chan_pwr = 0, pwr_reduction_80211h = 0;
1535 int pwr_level_cisco, pwr_level_80211h;
1537 __le16 capab = mgmt->u.probe_resp.capab_info;
1540 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1541 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1542 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1543 sdata, channel, country_ie, country_ie_len,
1544 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1546 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1549 if (cisco_dtpc_ie) {
1550 ieee80211_find_cisco_dtpc(
1551 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1552 has_cisco_pwr = true;
1555 if (!has_80211h_pwr && !has_cisco_pwr)
1558 /* If we have both 802.11h and Cisco DTPC, apply both limits
1559 * by picking the smallest of the two power levels advertised.
1561 if (has_80211h_pwr &&
1562 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1563 new_ap_level = pwr_level_80211h;
1565 if (sdata->ap_power_level == new_ap_level)
1569 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1570 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1571 sdata->u.mgd.bssid);
1572 } else { /* has_cisco_pwr is always true here. */
1573 new_ap_level = pwr_level_cisco;
1575 if (sdata->ap_power_level == new_ap_level)
1579 "Limiting TX power to %d dBm as advertised by %pM\n",
1580 pwr_level_cisco, sdata->u.mgd.bssid);
1583 sdata->ap_power_level = new_ap_level;
1584 if (__ieee80211_recalc_txpower(sdata))
1585 return BSS_CHANGED_TXPOWER;
1590 static void ieee80211_enable_ps(struct ieee80211_local *local,
1591 struct ieee80211_sub_if_data *sdata)
1593 struct ieee80211_conf *conf = &local->hw.conf;
1596 * If we are scanning right now then the parameters will
1597 * take effect when scan finishes.
1599 if (local->scanning)
1602 if (conf->dynamic_ps_timeout > 0 &&
1603 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1604 mod_timer(&local->dynamic_ps_timer, jiffies +
1605 msecs_to_jiffies(conf->dynamic_ps_timeout));
1607 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1608 ieee80211_send_nullfunc(local, sdata, true);
1610 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1611 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1614 conf->flags |= IEEE80211_CONF_PS;
1615 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1619 static void ieee80211_change_ps(struct ieee80211_local *local)
1621 struct ieee80211_conf *conf = &local->hw.conf;
1623 if (local->ps_sdata) {
1624 ieee80211_enable_ps(local, local->ps_sdata);
1625 } else if (conf->flags & IEEE80211_CONF_PS) {
1626 conf->flags &= ~IEEE80211_CONF_PS;
1627 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1628 del_timer_sync(&local->dynamic_ps_timer);
1629 cancel_work_sync(&local->dynamic_ps_enable_work);
1633 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1635 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1636 struct sta_info *sta = NULL;
1637 bool authorized = false;
1639 if (!mgd->powersave)
1645 if (!mgd->associated)
1648 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1651 if (!mgd->have_beacon)
1655 sta = sta_info_get(sdata, mgd->bssid);
1657 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1663 /* need to hold RTNL or interface lock */
1664 void ieee80211_recalc_ps(struct ieee80211_local *local)
1666 struct ieee80211_sub_if_data *sdata, *found = NULL;
1670 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1671 local->ps_sdata = NULL;
1675 list_for_each_entry(sdata, &local->interfaces, list) {
1676 if (!ieee80211_sdata_running(sdata))
1678 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1679 /* If an AP vif is found, then disable PS
1680 * by setting the count to zero thereby setting
1686 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1692 if (count == 1 && ieee80211_powersave_allowed(found)) {
1693 u8 dtimper = found->u.mgd.dtim_period;
1695 timeout = local->dynamic_ps_forced_timeout;
1698 local->hw.conf.dynamic_ps_timeout = timeout;
1700 /* If the TIM IE is invalid, pretend the value is 1 */
1704 local->hw.conf.ps_dtim_period = dtimper;
1705 local->ps_sdata = found;
1707 local->ps_sdata = NULL;
1710 ieee80211_change_ps(local);
1713 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1715 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1717 if (sdata->vif.bss_conf.ps != ps_allowed) {
1718 sdata->vif.bss_conf.ps = ps_allowed;
1719 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1723 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1725 struct ieee80211_local *local =
1726 container_of(work, struct ieee80211_local,
1727 dynamic_ps_disable_work);
1729 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1730 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1731 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1734 ieee80211_wake_queues_by_reason(&local->hw,
1735 IEEE80211_MAX_QUEUE_MAP,
1736 IEEE80211_QUEUE_STOP_REASON_PS,
1740 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1742 struct ieee80211_local *local =
1743 container_of(work, struct ieee80211_local,
1744 dynamic_ps_enable_work);
1745 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1746 struct ieee80211_if_managed *ifmgd;
1747 unsigned long flags;
1750 /* can only happen when PS was just disabled anyway */
1754 ifmgd = &sdata->u.mgd;
1756 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1759 if (local->hw.conf.dynamic_ps_timeout > 0) {
1760 /* don't enter PS if TX frames are pending */
1761 if (drv_tx_frames_pending(local)) {
1762 mod_timer(&local->dynamic_ps_timer, jiffies +
1764 local->hw.conf.dynamic_ps_timeout));
1769 * transmission can be stopped by others which leads to
1770 * dynamic_ps_timer expiry. Postpone the ps timer if it
1771 * is not the actual idle state.
1773 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1774 for (q = 0; q < local->hw.queues; q++) {
1775 if (local->queue_stop_reasons[q]) {
1776 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1778 mod_timer(&local->dynamic_ps_timer, jiffies +
1780 local->hw.conf.dynamic_ps_timeout));
1784 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1787 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1788 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1789 if (drv_tx_frames_pending(local)) {
1790 mod_timer(&local->dynamic_ps_timer, jiffies +
1792 local->hw.conf.dynamic_ps_timeout));
1794 ieee80211_send_nullfunc(local, sdata, true);
1795 /* Flush to get the tx status of nullfunc frame */
1796 ieee80211_flush_queues(local, sdata, false);
1800 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1801 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1802 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1803 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1804 local->hw.conf.flags |= IEEE80211_CONF_PS;
1805 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1809 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1811 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1813 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1816 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1818 struct delayed_work *delayed_work = to_delayed_work(work);
1819 struct ieee80211_sub_if_data *sdata =
1820 container_of(delayed_work, struct ieee80211_sub_if_data,
1821 dfs_cac_timer_work);
1822 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1824 mutex_lock(&sdata->local->mtx);
1825 if (sdata->wdev.cac_started) {
1826 ieee80211_vif_release_channel(sdata);
1827 cfg80211_cac_event(sdata->dev, &chandef,
1828 NL80211_RADAR_CAC_FINISHED,
1831 mutex_unlock(&sdata->local->mtx);
1835 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1837 struct ieee80211_local *local = sdata->local;
1838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1842 if (local->hw.queues < IEEE80211_NUM_ACS)
1845 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1846 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1848 unsigned long now = jiffies;
1850 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1851 tx_tspec->admitted_time &&
1852 time_after(now, tx_tspec->time_slice_start + HZ)) {
1853 tx_tspec->consumed_tx_time = 0;
1854 tx_tspec->time_slice_start = now;
1856 if (tx_tspec->downgraded)
1858 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1861 switch (tx_tspec->action) {
1862 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1863 /* take the original parameters */
1864 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1866 "failed to set TX queue parameters for queue %d\n",
1868 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1869 tx_tspec->downgraded = false;
1872 case TX_TSPEC_ACTION_DOWNGRADE:
1873 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1874 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1878 /* downgrade next lower non-ACM AC */
1879 for (non_acm_ac = ac + 1;
1880 non_acm_ac < IEEE80211_NUM_ACS;
1882 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1884 /* Usually the loop will result in using BK even if it
1885 * requires admission control, but such a configuration
1886 * makes no sense and we have to transmit somehow - the
1887 * AC selection does the same thing.
1888 * If we started out trying to downgrade from BK, then
1889 * the extra condition here might be needed.
1891 if (non_acm_ac >= IEEE80211_NUM_ACS)
1892 non_acm_ac = IEEE80211_AC_BK;
1893 if (drv_conf_tx(local, sdata, ac,
1894 &sdata->tx_conf[non_acm_ac]))
1896 "failed to set TX queue parameters for queue %d\n",
1898 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1900 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1901 tx_tspec->time_slice_start + HZ - now + 1);
1903 case TX_TSPEC_ACTION_NONE:
1912 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1914 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1915 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1918 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1920 struct ieee80211_sub_if_data *sdata;
1922 sdata = container_of(work, struct ieee80211_sub_if_data,
1923 u.mgd.tx_tspec_wk.work);
1924 ieee80211_sta_handle_tspec_ac_params(sdata);
1929 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1930 struct ieee80211_sub_if_data *sdata,
1931 const u8 *wmm_param, size_t wmm_param_len,
1932 const struct ieee80211_mu_edca_param_set *mu_edca)
1934 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1937 int count, mu_edca_count, ac;
1939 u8 uapsd_queues = 0;
1941 if (!local->ops->conf_tx)
1944 if (local->hw.queues < IEEE80211_NUM_ACS)
1950 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1953 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1954 uapsd_queues = ifmgd->uapsd_queues;
1956 count = wmm_param[6] & 0x0f;
1957 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1958 * if mu_edca was preset before and now it disappeared tell
1959 * the driver about it.
1961 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1962 if (count == ifmgd->wmm_last_param_set &&
1963 mu_edca_count == ifmgd->mu_edca_last_param_set)
1965 ifmgd->wmm_last_param_set = count;
1966 ifmgd->mu_edca_last_param_set = mu_edca_count;
1968 pos = wmm_param + 8;
1969 left = wmm_param_len - 8;
1971 memset(¶ms, 0, sizeof(params));
1974 for (; left >= 4; left -= 4, pos += 4) {
1975 int aci = (pos[0] >> 5) & 0x03;
1976 int acm = (pos[0] >> 4) & 0x01;
1981 ac = IEEE80211_AC_BK;
1983 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1984 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1986 params[ac].mu_edca = !!mu_edca;
1988 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1991 ac = IEEE80211_AC_VI;
1993 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1994 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1996 params[ac].mu_edca = !!mu_edca;
1998 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2001 ac = IEEE80211_AC_VO;
2003 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2004 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2006 params[ac].mu_edca = !!mu_edca;
2008 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2012 ac = IEEE80211_AC_BE;
2014 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2015 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2017 params[ac].mu_edca = !!mu_edca;
2019 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2023 params[ac].aifs = pos[0] & 0x0f;
2025 if (params[ac].aifs < 2) {
2027 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2028 params[ac].aifs, aci);
2029 params[ac].aifs = 2;
2031 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2032 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2033 params[ac].txop = get_unaligned_le16(pos + 2);
2034 params[ac].acm = acm;
2035 params[ac].uapsd = uapsd;
2037 if (params[ac].cw_min == 0 ||
2038 params[ac].cw_min > params[ac].cw_max) {
2040 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2041 params[ac].cw_min, params[ac].cw_max, aci);
2044 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac);
2047 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2049 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2051 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2052 params[ac].txop, params[ac].uapsd,
2053 ifmgd->tx_tspec[ac].downgraded);
2054 sdata->tx_conf[ac] = params[ac];
2055 if (!ifmgd->tx_tspec[ac].downgraded &&
2056 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
2058 "failed to set TX queue parameters for AC %d\n",
2062 /* enable WMM or activate new settings */
2063 sdata->vif.bss_conf.qos = true;
2067 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2069 lockdep_assert_held(&sdata->local->mtx);
2071 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2072 ieee80211_run_deferred_scan(sdata->local);
2075 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2077 mutex_lock(&sdata->local->mtx);
2078 __ieee80211_stop_poll(sdata);
2079 mutex_unlock(&sdata->local->mtx);
2082 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2083 u16 capab, bool erp_valid, u8 erp)
2085 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2086 struct ieee80211_supported_band *sband;
2088 bool use_protection;
2089 bool use_short_preamble;
2090 bool use_short_slot;
2092 sband = ieee80211_get_sband(sdata);
2097 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2098 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2100 use_protection = false;
2101 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2104 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2105 if (sband->band == NL80211_BAND_5GHZ)
2106 use_short_slot = true;
2108 if (use_protection != bss_conf->use_cts_prot) {
2109 bss_conf->use_cts_prot = use_protection;
2110 changed |= BSS_CHANGED_ERP_CTS_PROT;
2113 if (use_short_preamble != bss_conf->use_short_preamble) {
2114 bss_conf->use_short_preamble = use_short_preamble;
2115 changed |= BSS_CHANGED_ERP_PREAMBLE;
2118 if (use_short_slot != bss_conf->use_short_slot) {
2119 bss_conf->use_short_slot = use_short_slot;
2120 changed |= BSS_CHANGED_ERP_SLOT;
2126 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2127 struct cfg80211_bss *cbss,
2128 u32 bss_info_changed)
2130 struct ieee80211_bss *bss = (void *)cbss->priv;
2131 struct ieee80211_local *local = sdata->local;
2132 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2134 bss_info_changed |= BSS_CHANGED_ASSOC;
2135 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2136 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2138 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2139 beacon_loss_count * bss_conf->beacon_int));
2141 sdata->u.mgd.associated = cbss;
2142 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2144 ieee80211_check_rate_mask(sdata);
2146 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2148 if (sdata->vif.p2p ||
2149 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2150 const struct cfg80211_bss_ies *ies;
2153 ies = rcu_dereference(cbss->ies);
2157 ret = cfg80211_get_p2p_attr(
2158 ies->data, ies->len,
2159 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2160 (u8 *) &bss_conf->p2p_noa_attr,
2161 sizeof(bss_conf->p2p_noa_attr));
2163 sdata->u.mgd.p2p_noa_index =
2164 bss_conf->p2p_noa_attr.index;
2165 bss_info_changed |= BSS_CHANGED_P2P_PS;
2171 /* just to be sure */
2172 ieee80211_stop_poll(sdata);
2174 ieee80211_led_assoc(local, 1);
2176 if (sdata->u.mgd.have_beacon) {
2178 * If the AP is buggy we may get here with no DTIM period
2179 * known, so assume it's 1 which is the only safe assumption
2180 * in that case, although if the TIM IE is broken powersave
2181 * probably just won't work at all.
2183 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2184 bss_conf->beacon_rate = bss->beacon_rate;
2185 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2187 bss_conf->beacon_rate = NULL;
2188 bss_conf->dtim_period = 0;
2191 bss_conf->assoc = 1;
2193 /* Tell the driver to monitor connection quality (if supported) */
2194 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2195 bss_conf->cqm_rssi_thold)
2196 bss_info_changed |= BSS_CHANGED_CQM;
2198 /* Enable ARP filtering */
2199 if (bss_conf->arp_addr_cnt)
2200 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2202 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2204 mutex_lock(&local->iflist_mtx);
2205 ieee80211_recalc_ps(local);
2206 mutex_unlock(&local->iflist_mtx);
2208 ieee80211_recalc_smps(sdata);
2209 ieee80211_recalc_ps_vif(sdata);
2211 netif_carrier_on(sdata->dev);
2214 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2215 u16 stype, u16 reason, bool tx,
2218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2219 struct ieee80211_local *local = sdata->local;
2222 sdata_assert_lock(sdata);
2224 if (WARN_ON_ONCE(tx && !frame_buf))
2227 if (WARN_ON(!ifmgd->associated))
2230 ieee80211_stop_poll(sdata);
2232 ifmgd->associated = NULL;
2233 netif_carrier_off(sdata->dev);
2236 * if we want to get out of ps before disassoc (why?) we have
2237 * to do it before sending disassoc, as otherwise the null-packet
2240 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2241 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2242 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2244 local->ps_sdata = NULL;
2246 /* disable per-vif ps */
2247 ieee80211_recalc_ps_vif(sdata);
2249 /* make sure ongoing transmission finishes */
2253 * drop any frame before deauth/disassoc, this can be data or
2254 * management frame. Since we are disconnecting, we should not
2255 * insist sending these frames which can take time and delay
2256 * the disconnection and possible the roaming.
2259 ieee80211_flush_queues(local, sdata, true);
2261 /* deauthenticate/disassociate now */
2262 if (tx || frame_buf) {
2264 * In multi channel scenarios guarantee that the virtual
2265 * interface is granted immediate airtime to transmit the
2266 * deauthentication frame by calling mgd_prepare_tx, if the
2267 * driver requested so.
2269 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2270 !ifmgd->have_beacon)
2271 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2273 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2274 reason, tx, frame_buf);
2277 /* flush out frame - make sure the deauth was actually sent */
2279 ieee80211_flush_queues(local, sdata, false);
2281 /* clear bssid only after building the needed mgmt frames */
2282 eth_zero_addr(ifmgd->bssid);
2284 /* remove AP and TDLS peers */
2285 sta_info_flush(sdata);
2287 /* finally reset all BSS / config parameters */
2288 changed |= ieee80211_reset_erp_info(sdata);
2290 ieee80211_led_assoc(local, 0);
2291 changed |= BSS_CHANGED_ASSOC;
2292 sdata->vif.bss_conf.assoc = false;
2294 ifmgd->p2p_noa_index = -1;
2295 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2296 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2298 /* on the next assoc, re-program HT/VHT parameters */
2299 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2300 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2301 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2302 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2304 /* reset MU-MIMO ownership and group data */
2305 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2306 sizeof(sdata->vif.bss_conf.mu_group.membership));
2307 memset(sdata->vif.bss_conf.mu_group.position, 0,
2308 sizeof(sdata->vif.bss_conf.mu_group.position));
2309 changed |= BSS_CHANGED_MU_GROUPS;
2310 sdata->vif.mu_mimo_owner = false;
2312 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2314 del_timer_sync(&local->dynamic_ps_timer);
2315 cancel_work_sync(&local->dynamic_ps_enable_work);
2317 /* Disable ARP filtering */
2318 if (sdata->vif.bss_conf.arp_addr_cnt)
2319 changed |= BSS_CHANGED_ARP_FILTER;
2321 sdata->vif.bss_conf.qos = false;
2322 changed |= BSS_CHANGED_QOS;
2324 /* The BSSID (not really interesting) and HT changed */
2325 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2326 ieee80211_bss_info_change_notify(sdata, changed);
2328 /* disassociated - set to defaults now */
2329 ieee80211_set_wmm_default(sdata, false, false);
2331 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2332 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2333 del_timer_sync(&sdata->u.mgd.timer);
2334 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2336 sdata->vif.bss_conf.dtim_period = 0;
2337 sdata->vif.bss_conf.beacon_rate = NULL;
2339 ifmgd->have_beacon = false;
2342 mutex_lock(&local->mtx);
2343 ieee80211_vif_release_channel(sdata);
2345 sdata->vif.csa_active = false;
2346 ifmgd->csa_waiting_bcn = false;
2347 ifmgd->csa_ignored_same_chan = false;
2348 if (sdata->csa_block_tx) {
2349 ieee80211_wake_vif_queues(local, sdata,
2350 IEEE80211_QUEUE_STOP_REASON_CSA);
2351 sdata->csa_block_tx = false;
2353 mutex_unlock(&local->mtx);
2355 /* existing TX TSPEC sessions no longer exist */
2356 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2357 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2359 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2362 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2363 struct ieee80211_hdr *hdr)
2366 * We can postpone the mgd.timer whenever receiving unicast frames
2367 * from AP because we know that the connection is working both ways
2368 * at that time. But multicast frames (and hence also beacons) must
2369 * be ignored here, because we need to trigger the timer during
2370 * data idle periods for sending the periodic probe request to the
2371 * AP we're connected to.
2373 if (is_multicast_ether_addr(hdr->addr1))
2376 ieee80211_sta_reset_conn_monitor(sdata);
2379 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2381 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2382 struct ieee80211_local *local = sdata->local;
2384 mutex_lock(&local->mtx);
2385 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2388 __ieee80211_stop_poll(sdata);
2390 mutex_lock(&local->iflist_mtx);
2391 ieee80211_recalc_ps(local);
2392 mutex_unlock(&local->iflist_mtx);
2394 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2398 * We've received a probe response, but are not sure whether
2399 * we have or will be receiving any beacons or data, so let's
2400 * schedule the timers again, just in case.
2402 ieee80211_sta_reset_beacon_monitor(sdata);
2404 mod_timer(&ifmgd->conn_mon_timer,
2405 round_jiffies_up(jiffies +
2406 IEEE80211_CONNECTION_IDLE_TIME));
2408 mutex_unlock(&local->mtx);
2411 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2412 struct ieee80211_hdr *hdr,
2415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2416 u16 tid = ieee80211_get_tid(hdr);
2417 int ac = ieee80211_ac_from_tid(tid);
2418 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2419 unsigned long now = jiffies;
2421 if (likely(!tx_tspec->admitted_time))
2424 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2425 tx_tspec->consumed_tx_time = 0;
2426 tx_tspec->time_slice_start = now;
2428 if (tx_tspec->downgraded) {
2429 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2430 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2434 if (tx_tspec->downgraded)
2437 tx_tspec->consumed_tx_time += tx_time;
2439 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2440 tx_tspec->downgraded = true;
2441 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2442 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2446 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2447 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2449 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2451 if (!ieee80211_is_data(hdr->frame_control))
2454 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2455 sdata->u.mgd.probe_send_count > 0) {
2457 ieee80211_sta_reset_conn_monitor(sdata);
2459 sdata->u.mgd.nullfunc_failed = true;
2460 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2465 ieee80211_sta_reset_conn_monitor(sdata);
2468 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2469 const u8 *src, const u8 *dst,
2470 const u8 *ssid, size_t ssid_len,
2471 struct ieee80211_channel *channel)
2473 struct sk_buff *skb;
2475 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2476 ssid, ssid_len, NULL, 0,
2477 IEEE80211_PROBE_FLAG_DIRECTED);
2479 ieee80211_tx_skb(sdata, skb);
2482 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2484 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2486 u8 *dst = ifmgd->associated->bssid;
2487 u8 unicast_limit = max(1, max_probe_tries - 3);
2488 struct sta_info *sta;
2491 * Try sending broadcast probe requests for the last three
2492 * probe requests after the first ones failed since some
2493 * buggy APs only support broadcast probe requests.
2495 if (ifmgd->probe_send_count >= unicast_limit)
2499 * When the hardware reports an accurate Tx ACK status, it's
2500 * better to send a nullfunc frame instead of a probe request,
2501 * as it will kick us off the AP quickly if we aren't associated
2502 * anymore. The timeout will be reset if the frame is ACKed by
2505 ifmgd->probe_send_count++;
2508 mutex_lock(&sdata->local->sta_mtx);
2509 sta = sta_info_get(sdata, dst);
2511 ieee80211_check_fast_rx(sta);
2512 mutex_unlock(&sdata->local->sta_mtx);
2515 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2516 ifmgd->nullfunc_failed = false;
2517 ieee80211_send_nullfunc(sdata->local, sdata, false);
2522 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2523 if (WARN_ON_ONCE(ssid == NULL))
2528 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2530 ifmgd->associated->channel);
2534 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2535 run_again(sdata, ifmgd->probe_timeout);
2538 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2541 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2542 bool already = false;
2544 if (!ieee80211_sdata_running(sdata))
2549 if (!ifmgd->associated)
2552 mutex_lock(&sdata->local->mtx);
2554 if (sdata->local->tmp_channel || sdata->local->scanning) {
2555 mutex_unlock(&sdata->local->mtx);
2560 mlme_dbg_ratelimited(sdata,
2561 "detected beacon loss from AP (missed %d beacons) - probing\n",
2564 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2568 * The driver/our work has already reported this event or the
2569 * connection monitoring has kicked in and we have already sent
2570 * a probe request. Or maybe the AP died and the driver keeps
2571 * reporting until we disassociate...
2573 * In either case we have to ignore the current call to this
2574 * function (except for setting the correct probe reason bit)
2575 * because otherwise we would reset the timer every time and
2576 * never check whether we received a probe response!
2578 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2581 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2583 mutex_unlock(&sdata->local->mtx);
2588 mutex_lock(&sdata->local->iflist_mtx);
2589 ieee80211_recalc_ps(sdata->local);
2590 mutex_unlock(&sdata->local->iflist_mtx);
2592 ifmgd->probe_send_count = 0;
2593 ieee80211_mgd_probe_ap_send(sdata);
2595 sdata_unlock(sdata);
2598 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2599 struct ieee80211_vif *vif)
2601 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2602 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2603 struct cfg80211_bss *cbss;
2604 struct sk_buff *skb;
2608 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2611 sdata_assert_lock(sdata);
2613 if (ifmgd->associated)
2614 cbss = ifmgd->associated;
2615 else if (ifmgd->auth_data)
2616 cbss = ifmgd->auth_data->bss;
2617 else if (ifmgd->assoc_data)
2618 cbss = ifmgd->assoc_data->bss;
2623 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2624 if (WARN_ON_ONCE(ssid == NULL))
2629 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2630 (u32) -1, cbss->channel,
2632 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2637 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2639 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2640 const u8 *buf, size_t len, bool tx,
2643 struct ieee80211_event event = {
2645 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2646 .u.mlme.reason = reason,
2650 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2652 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2654 drv_event_callback(sdata->local, sdata, &event);
2657 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2659 struct ieee80211_local *local = sdata->local;
2660 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2661 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2665 if (!ifmgd->associated) {
2666 sdata_unlock(sdata);
2670 tx = !sdata->csa_block_tx;
2672 /* AP is probably out of range (or not reachable for another reason) so
2673 * remove the bss struct for that AP.
2675 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2677 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2678 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2680 mutex_lock(&local->mtx);
2681 sdata->vif.csa_active = false;
2682 ifmgd->csa_waiting_bcn = false;
2683 if (sdata->csa_block_tx) {
2684 ieee80211_wake_vif_queues(local, sdata,
2685 IEEE80211_QUEUE_STOP_REASON_CSA);
2686 sdata->csa_block_tx = false;
2688 mutex_unlock(&local->mtx);
2690 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2691 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2693 sdata_unlock(sdata);
2696 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2698 struct ieee80211_sub_if_data *sdata =
2699 container_of(work, struct ieee80211_sub_if_data,
2700 u.mgd.beacon_connection_loss_work);
2701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2703 if (ifmgd->associated)
2704 ifmgd->beacon_loss_count++;
2706 if (ifmgd->connection_loss) {
2707 sdata_info(sdata, "Connection to AP %pM lost\n",
2709 __ieee80211_disconnect(sdata);
2711 ieee80211_mgd_probe_ap(sdata, true);
2715 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2717 struct ieee80211_sub_if_data *sdata =
2718 container_of(work, struct ieee80211_sub_if_data,
2719 u.mgd.csa_connection_drop_work);
2721 __ieee80211_disconnect(sdata);
2724 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2726 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2727 struct ieee80211_hw *hw = &sdata->local->hw;
2729 trace_api_beacon_loss(sdata);
2731 sdata->u.mgd.connection_loss = false;
2732 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2734 EXPORT_SYMBOL(ieee80211_beacon_loss);
2736 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2738 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2739 struct ieee80211_hw *hw = &sdata->local->hw;
2741 trace_api_connection_loss(sdata);
2743 sdata->u.mgd.connection_loss = true;
2744 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2746 EXPORT_SYMBOL(ieee80211_connection_loss);
2749 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2752 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2754 sdata_assert_lock(sdata);
2758 * we are not authenticated yet, the only timer that could be
2759 * running is the timeout for the authentication response which
2760 * which is not relevant anymore.
2762 del_timer_sync(&sdata->u.mgd.timer);
2763 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2765 eth_zero_addr(sdata->u.mgd.bssid);
2766 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2767 sdata->u.mgd.flags = 0;
2768 mutex_lock(&sdata->local->mtx);
2769 ieee80211_vif_release_channel(sdata);
2770 mutex_unlock(&sdata->local->mtx);
2773 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2775 sdata->u.mgd.auth_data = NULL;
2778 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2779 bool assoc, bool abandon)
2781 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2783 sdata_assert_lock(sdata);
2787 * we are not associated yet, the only timer that could be
2788 * running is the timeout for the association response which
2789 * which is not relevant anymore.
2791 del_timer_sync(&sdata->u.mgd.timer);
2792 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2794 eth_zero_addr(sdata->u.mgd.bssid);
2795 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2796 sdata->u.mgd.flags = 0;
2797 sdata->vif.mu_mimo_owner = false;
2799 mutex_lock(&sdata->local->mtx);
2800 ieee80211_vif_release_channel(sdata);
2801 mutex_unlock(&sdata->local->mtx);
2804 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2808 sdata->u.mgd.assoc_data = NULL;
2811 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2812 struct ieee80211_mgmt *mgmt, size_t len)
2814 struct ieee80211_local *local = sdata->local;
2815 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2817 struct ieee802_11_elems elems;
2820 pos = mgmt->u.auth.variable;
2821 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2822 mgmt->bssid, auth_data->bss->bssid);
2823 if (!elems.challenge)
2825 auth_data->expected_transaction = 4;
2826 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2827 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2828 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2829 IEEE80211_TX_INTFL_MLME_CONN_TX;
2830 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2831 elems.challenge - 2, elems.challenge_len + 2,
2832 auth_data->bss->bssid, auth_data->bss->bssid,
2833 auth_data->key, auth_data->key_len,
2834 auth_data->key_idx, tx_flags);
2837 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2841 struct sta_info *sta;
2844 sdata_info(sdata, "authenticated\n");
2845 ifmgd->auth_data->done = true;
2846 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2847 ifmgd->auth_data->timeout_started = true;
2848 run_again(sdata, ifmgd->auth_data->timeout);
2850 /* move station state to auth */
2851 mutex_lock(&sdata->local->sta_mtx);
2852 sta = sta_info_get(sdata, bssid);
2854 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2858 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2859 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2865 mutex_unlock(&sdata->local->sta_mtx);
2869 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2870 struct ieee80211_mgmt *mgmt, size_t len)
2872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2874 u16 auth_alg, auth_transaction, status_code;
2875 struct ieee80211_event event = {
2877 .u.mlme.data = AUTH_EVENT,
2880 sdata_assert_lock(sdata);
2885 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2888 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2890 if (!ether_addr_equal(bssid, mgmt->bssid))
2893 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2894 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2895 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2897 if (auth_alg != ifmgd->auth_data->algorithm ||
2898 (auth_alg != WLAN_AUTH_SAE &&
2899 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2900 (auth_alg == WLAN_AUTH_SAE &&
2901 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2902 auth_transaction > 2))) {
2903 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2904 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2906 ifmgd->auth_data->expected_transaction);
2910 if (status_code != WLAN_STATUS_SUCCESS) {
2911 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2912 mgmt->sa, status_code);
2913 ieee80211_destroy_auth_data(sdata, false);
2914 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2915 event.u.mlme.status = MLME_DENIED;
2916 event.u.mlme.reason = status_code;
2917 drv_event_callback(sdata->local, sdata, &event);
2921 switch (ifmgd->auth_data->algorithm) {
2922 case WLAN_AUTH_OPEN:
2923 case WLAN_AUTH_LEAP:
2926 case WLAN_AUTH_FILS_SK:
2927 case WLAN_AUTH_FILS_SK_PFS:
2928 case WLAN_AUTH_FILS_PK:
2930 case WLAN_AUTH_SHARED_KEY:
2931 if (ifmgd->auth_data->expected_transaction != 4) {
2932 ieee80211_auth_challenge(sdata, mgmt, len);
2933 /* need another frame */
2938 WARN_ONCE(1, "invalid auth alg %d",
2939 ifmgd->auth_data->algorithm);
2943 event.u.mlme.status = MLME_SUCCESS;
2944 drv_event_callback(sdata->local, sdata, &event);
2945 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2946 (auth_transaction == 2 &&
2947 ifmgd->auth_data->expected_transaction == 2)) {
2948 if (!ieee80211_mark_sta_auth(sdata, bssid))
2950 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2951 auth_transaction == 2) {
2952 sdata_info(sdata, "SAE peer confirmed\n");
2953 ifmgd->auth_data->peer_confirmed = true;
2956 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2959 mutex_unlock(&sdata->local->sta_mtx);
2960 /* ignore frame -- wait for timeout */
2963 #define case_WLAN(type) \
2964 case WLAN_REASON_##type: return #type
2966 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2968 switch (reason_code) {
2969 case_WLAN(UNSPECIFIED);
2970 case_WLAN(PREV_AUTH_NOT_VALID);
2971 case_WLAN(DEAUTH_LEAVING);
2972 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2973 case_WLAN(DISASSOC_AP_BUSY);
2974 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2975 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2976 case_WLAN(DISASSOC_STA_HAS_LEFT);
2977 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2978 case_WLAN(DISASSOC_BAD_POWER);
2979 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2980 case_WLAN(INVALID_IE);
2981 case_WLAN(MIC_FAILURE);
2982 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2983 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2984 case_WLAN(IE_DIFFERENT);
2985 case_WLAN(INVALID_GROUP_CIPHER);
2986 case_WLAN(INVALID_PAIRWISE_CIPHER);
2987 case_WLAN(INVALID_AKMP);
2988 case_WLAN(UNSUPP_RSN_VERSION);
2989 case_WLAN(INVALID_RSN_IE_CAP);
2990 case_WLAN(IEEE8021X_FAILED);
2991 case_WLAN(CIPHER_SUITE_REJECTED);
2992 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2993 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2994 case_WLAN(DISASSOC_LOW_ACK);
2995 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2996 case_WLAN(QSTA_LEAVE_QBSS);
2997 case_WLAN(QSTA_NOT_USE);
2998 case_WLAN(QSTA_REQUIRE_SETUP);
2999 case_WLAN(QSTA_TIMEOUT);
3000 case_WLAN(QSTA_CIPHER_NOT_SUPP);
3001 case_WLAN(MESH_PEER_CANCELED);
3002 case_WLAN(MESH_MAX_PEERS);
3003 case_WLAN(MESH_CONFIG);
3004 case_WLAN(MESH_CLOSE);
3005 case_WLAN(MESH_MAX_RETRIES);
3006 case_WLAN(MESH_CONFIRM_TIMEOUT);
3007 case_WLAN(MESH_INVALID_GTK);
3008 case_WLAN(MESH_INCONSISTENT_PARAM);
3009 case_WLAN(MESH_INVALID_SECURITY);
3010 case_WLAN(MESH_PATH_ERROR);
3011 case_WLAN(MESH_PATH_NOFORWARD);
3012 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3013 case_WLAN(MAC_EXISTS_IN_MBSS);
3014 case_WLAN(MESH_CHAN_REGULATORY);
3015 case_WLAN(MESH_CHAN);
3016 default: return "<unknown>";
3020 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3021 struct ieee80211_mgmt *mgmt, size_t len)
3023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3024 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3026 sdata_assert_lock(sdata);
3031 if (ifmgd->associated &&
3032 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3033 const u8 *bssid = ifmgd->associated->bssid;
3035 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3037 ieee80211_get_reason_code_string(reason_code));
3039 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3041 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3046 if (ifmgd->assoc_data &&
3047 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3048 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3051 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3053 ieee80211_get_reason_code_string(reason_code));
3055 ieee80211_destroy_assoc_data(sdata, false, true);
3057 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3063 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3064 struct ieee80211_mgmt *mgmt, size_t len)
3066 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3069 sdata_assert_lock(sdata);
3074 if (!ifmgd->associated ||
3075 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3078 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3080 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3081 mgmt->sa, reason_code,
3082 ieee80211_get_reason_code_string(reason_code));
3084 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3086 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3089 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3090 u8 *supp_rates, unsigned int supp_rates_len,
3091 u32 *rates, u32 *basic_rates,
3092 bool *have_higher_than_11mbit,
3093 int *min_rate, int *min_rate_index,
3098 for (i = 0; i < supp_rates_len; i++) {
3099 int rate = supp_rates[i] & 0x7f;
3100 bool is_basic = !!(supp_rates[i] & 0x80);
3102 if ((rate * 5 * (1 << shift)) > 110)
3103 *have_higher_than_11mbit = true;
3106 * Skip HT and VHT BSS membership selectors since they're not
3109 * Note: Even though the membership selector and the basic
3110 * rate flag share the same bit, they are not exactly
3113 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3114 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3117 for (j = 0; j < sband->n_bitrates; j++) {
3118 struct ieee80211_rate *br;
3121 br = &sband->bitrates[j];
3123 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3124 if (brate == rate) {
3127 *basic_rates |= BIT(j);
3128 if ((rate * 5) < *min_rate) {
3129 *min_rate = rate * 5;
3130 *min_rate_index = j;
3138 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3139 const struct ieee802_11_elems *elems)
3141 if (elems->ext_capab_len < 10)
3144 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3147 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3148 IEEE80211_HE_MAC_CAP0_TWT_RES;
3151 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3152 struct sta_info *sta,
3153 struct ieee802_11_elems *elems)
3155 bool twt = ieee80211_twt_req_supported(sta, elems);
3157 if (sdata->vif.bss_conf.twt_requester != twt) {
3158 sdata->vif.bss_conf.twt_requester = twt;
3159 return BSS_CHANGED_TWT;
3164 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3165 struct cfg80211_bss *cbss,
3166 struct ieee80211_mgmt *mgmt, size_t len)
3168 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3169 struct ieee80211_local *local = sdata->local;
3170 struct ieee80211_supported_band *sband;
3171 struct sta_info *sta;
3173 u16 capab_info, aid;
3174 struct ieee802_11_elems elems;
3175 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3176 const struct cfg80211_bss_ies *bss_ies = NULL;
3177 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3182 /* AssocResp and ReassocResp have identical structure */
3184 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3185 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3188 * The 5 MSB of the AID field are reserved
3189 * (802.11-2016 9.4.1.8 AID field)
3193 ifmgd->broken_ap = false;
3195 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3196 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3199 ifmgd->broken_ap = true;
3202 pos = mgmt->u.assoc_resp.variable;
3203 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3204 mgmt->bssid, assoc_data->bss->bssid);
3206 if (!elems.supp_rates) {
3207 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3212 ifmgd->tdls_chan_switch_prohibited =
3213 elems.ext_capab && elems.ext_capab_len >= 5 &&
3214 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3217 * Some APs are erroneously not including some information in their
3218 * (re)association response frames. Try to recover by using the data
3219 * from the beacon or probe response. This seems to afflict mobile
3220 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3221 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3223 if ((assoc_data->wmm && !elems.wmm_param) ||
3224 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3225 (!elems.ht_cap_elem || !elems.ht_operation)) ||
3226 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3227 (!elems.vht_cap_elem || !elems.vht_operation))) {
3228 const struct cfg80211_bss_ies *ies;
3229 struct ieee802_11_elems bss_elems;
3232 ies = rcu_dereference(cbss->ies);
3234 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3240 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3243 assoc_data->bss->bssid);
3244 if (assoc_data->wmm &&
3245 !elems.wmm_param && bss_elems.wmm_param) {
3246 elems.wmm_param = bss_elems.wmm_param;
3248 "AP bug: WMM param missing from AssocResp\n");
3252 * Also check if we requested HT/VHT, otherwise the AP doesn't
3253 * have to include the IEs in the (re)association response.
3255 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3256 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3257 elems.ht_cap_elem = bss_elems.ht_cap_elem;
3259 "AP bug: HT capability missing from AssocResp\n");
3261 if (!elems.ht_operation && bss_elems.ht_operation &&
3262 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3263 elems.ht_operation = bss_elems.ht_operation;
3265 "AP bug: HT operation missing from AssocResp\n");
3267 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3268 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3269 elems.vht_cap_elem = bss_elems.vht_cap_elem;
3271 "AP bug: VHT capa missing from AssocResp\n");
3273 if (!elems.vht_operation && bss_elems.vht_operation &&
3274 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3275 elems.vht_operation = bss_elems.vht_operation;
3277 "AP bug: VHT operation missing from AssocResp\n");
3282 * We previously checked these in the beacon/probe response, so
3283 * they should be present here. This is just a safety net.
3285 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3286 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3288 "HT AP is missing WMM params or HT capability/operation\n");
3293 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3294 (!elems.vht_cap_elem || !elems.vht_operation)) {
3296 "VHT AP is missing VHT capability/operation\n");
3301 mutex_lock(&sdata->local->sta_mtx);
3303 * station info was already allocated and inserted before
3304 * the association and should be available to us
3306 sta = sta_info_get(sdata, cbss->bssid);
3307 if (WARN_ON(!sta)) {
3308 mutex_unlock(&sdata->local->sta_mtx);
3313 sband = ieee80211_get_sband(sdata);
3315 mutex_unlock(&sdata->local->sta_mtx);
3320 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3321 (!elems.he_cap || !elems.he_operation)) {
3322 mutex_unlock(&sdata->local->sta_mtx);
3324 "HE AP is missing HE capability/operation\n");
3329 /* Set up internal HT/VHT capabilities */
3330 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3331 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3332 elems.ht_cap_elem, sta);
3334 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3335 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3336 elems.vht_cap_elem, sta);
3338 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3340 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3345 bss_conf->he_support = sta->sta.he_cap.has_he;
3346 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
3348 bss_conf->he_support = false;
3349 bss_conf->twt_requester = false;
3352 if (bss_conf->he_support) {
3353 bss_conf->bss_color =
3354 le32_get_bits(elems.he_operation->he_oper_params,
3355 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3357 bss_conf->htc_trig_based_pkt_ext =
3358 le32_get_bits(elems.he_operation->he_oper_params,
3359 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3360 bss_conf->frame_time_rts_th =
3361 le32_get_bits(elems.he_operation->he_oper_params,
3362 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3364 bss_conf->multi_sta_back_32bit =
3365 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3366 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3368 bss_conf->ack_enabled =
3369 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3370 IEEE80211_HE_MAC_CAP2_ACK_EN;
3372 bss_conf->uora_exists = !!elems.uora_element;
3373 if (elems.uora_element)
3374 bss_conf->uora_ocw_range = elems.uora_element[0];
3376 /* TODO: OPEN: what happens if BSS color disable is set? */
3379 if (cbss->transmitted_bss) {
3380 bss_conf->nontransmitted = true;
3381 ether_addr_copy(bss_conf->transmitter_bssid,
3382 cbss->transmitted_bss->bssid);
3383 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3384 bss_conf->bssid_index = cbss->bssid_index;
3388 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3389 * in their association response, so ignore that data for our own
3390 * configuration. If it changed since the last beacon, we'll get the
3391 * next beacon and update then.
3395 * If an operating mode notification IE is present, override the
3396 * NSS calculation (that would be done in rate_control_rate_init())
3397 * and use the # of streams from that element.
3399 if (elems.opmode_notif &&
3400 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3403 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3404 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3406 sta->sta.rx_nss = nss;
3409 rate_control_rate_init(sta);
3411 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3412 set_sta_flag(sta, WLAN_STA_MFP);
3413 sta->sta.mfp = true;
3415 sta->sta.mfp = false;
3418 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3420 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3421 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3422 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3425 "failed to move station %pM to desired state\n",
3427 WARN_ON(__sta_info_destroy(sta));
3428 mutex_unlock(&sdata->local->sta_mtx);
3433 mutex_unlock(&sdata->local->sta_mtx);
3436 * Always handle WMM once after association regardless
3437 * of the first value the AP uses. Setting -1 here has
3438 * that effect because the AP values is an unsigned
3441 ifmgd->wmm_last_param_set = -1;
3442 ifmgd->mu_edca_last_param_set = -1;
3444 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3445 ieee80211_set_wmm_default(sdata, false, false);
3446 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3447 elems.wmm_param_len,
3448 elems.mu_edca_param_set)) {
3449 /* still enable QoS since we might have HT/VHT */
3450 ieee80211_set_wmm_default(sdata, false, true);
3451 /* set the disable-WMM flag in this case to disable
3452 * tracking WMM parameter changes in the beacon if
3453 * the parameters weren't actually valid. Doing so
3454 * avoids changing parameters very strangely when
3455 * the AP is going back and forth between valid and
3456 * invalid parameters.
3458 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3460 changed |= BSS_CHANGED_QOS;
3462 if (elems.max_idle_period_ie) {
3463 bss_conf->max_idle_period =
3464 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3465 bss_conf->protected_keep_alive =
3466 !!(elems.max_idle_period_ie->idle_options &
3467 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3468 changed |= BSS_CHANGED_KEEP_ALIVE;
3470 bss_conf->max_idle_period = 0;
3471 bss_conf->protected_keep_alive = false;
3474 /* set AID and assoc capability,
3475 * ieee80211_set_associated() will tell the driver */
3476 bss_conf->aid = aid;
3477 bss_conf->assoc_capability = capab_info;
3478 ieee80211_set_associated(sdata, cbss, changed);
3481 * If we're using 4-addr mode, let the AP know that we're
3482 * doing so, so that it can create the STA VLAN on its side
3484 if (ifmgd->use_4addr)
3485 ieee80211_send_4addr_nullfunc(local, sdata);
3488 * Start timer to probe the connection to the AP now.
3489 * Also start the timer that will detect beacon loss.
3491 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3492 ieee80211_sta_reset_beacon_monitor(sdata);
3500 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3501 struct ieee80211_mgmt *mgmt,
3504 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3505 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3506 u16 capab_info, status_code, aid;
3507 struct ieee802_11_elems elems;
3508 int ac, uapsd_queues = -1;
3511 struct cfg80211_bss *bss;
3512 struct ieee80211_event event = {
3514 .u.mlme.data = ASSOC_EVENT,
3517 sdata_assert_lock(sdata);
3521 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3525 * AssocResp and ReassocResp have identical structure, so process both
3526 * of them in this function.
3532 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3533 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3534 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3535 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3538 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3539 reassoc ? "Rea" : "A", mgmt->sa,
3540 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3542 if (assoc_data->fils_kek_len &&
3543 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3546 pos = mgmt->u.assoc_resp.variable;
3547 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3548 mgmt->bssid, assoc_data->bss->bssid);
3550 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3551 elems.timeout_int &&
3552 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3554 tu = le32_to_cpu(elems.timeout_int->value);
3555 ms = tu * 1024 / 1000;
3557 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3559 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3560 assoc_data->timeout_started = true;
3561 if (ms > IEEE80211_ASSOC_TIMEOUT)
3562 run_again(sdata, assoc_data->timeout);
3566 bss = assoc_data->bss;
3568 if (status_code != WLAN_STATUS_SUCCESS) {
3569 sdata_info(sdata, "%pM denied association (code=%d)\n",
3570 mgmt->sa, status_code);
3571 ieee80211_destroy_assoc_data(sdata, false, false);
3572 event.u.mlme.status = MLME_DENIED;
3573 event.u.mlme.reason = status_code;
3574 drv_event_callback(sdata->local, sdata, &event);
3576 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3577 /* oops -- internal error -- send timeout for now */
3578 ieee80211_destroy_assoc_data(sdata, false, false);
3579 cfg80211_assoc_timeout(sdata->dev, bss);
3582 event.u.mlme.status = MLME_SUCCESS;
3583 drv_event_callback(sdata->local, sdata, &event);
3584 sdata_info(sdata, "associated\n");
3587 * destroy assoc_data afterwards, as otherwise an idle
3588 * recalc after assoc_data is NULL but before associated
3589 * is set can cause the interface to go idle
3591 ieee80211_destroy_assoc_data(sdata, true, false);
3593 /* get uapsd queues configuration */
3595 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3596 if (sdata->tx_conf[ac].uapsd)
3597 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3600 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3601 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3604 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3605 struct ieee80211_mgmt *mgmt, size_t len,
3606 struct ieee80211_rx_status *rx_status)
3608 struct ieee80211_local *local = sdata->local;
3609 struct ieee80211_bss *bss;
3610 struct ieee80211_channel *channel;
3612 sdata_assert_lock(sdata);
3614 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3618 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3620 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3621 ieee80211_rx_bss_put(local, bss);
3626 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3627 struct sk_buff *skb)
3629 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3630 struct ieee80211_if_managed *ifmgd;
3631 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3632 size_t baselen, len = skb->len;
3634 ifmgd = &sdata->u.mgd;
3636 sdata_assert_lock(sdata);
3638 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3639 return; /* ignore ProbeResp to foreign address */
3641 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3645 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3647 if (ifmgd->associated &&
3648 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3649 ieee80211_reset_ap_probe(sdata);
3653 * This is the canonical list of information elements we care about,
3654 * the filter code also gives us all changes to the Microsoft OUI
3655 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3656 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3657 * changes to requested client power.
3659 * We implement beacon filtering in software since that means we can
3660 * avoid processing the frame here and in cfg80211, and userspace
3661 * will not be able to tell whether the hardware supports it or not.
3663 * XXX: This list needs to be dynamic -- userspace needs to be able to
3664 * add items it requires. It also needs to be able to tell us to
3665 * look out for other vendor IEs.
3667 static const u64 care_about_ies =
3668 (1ULL << WLAN_EID_COUNTRY) |
3669 (1ULL << WLAN_EID_ERP_INFO) |
3670 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3671 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3672 (1ULL << WLAN_EID_HT_CAPABILITY) |
3673 (1ULL << WLAN_EID_HT_OPERATION) |
3674 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3676 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3677 struct ieee80211_if_managed *ifmgd,
3678 struct ieee80211_bss_conf *bss_conf,
3679 struct ieee80211_local *local,
3680 struct ieee80211_rx_status *rx_status)
3682 /* Track average RSSI from the Beacon frames of the current AP */
3684 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3685 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3686 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3687 ifmgd->last_cqm_event_signal = 0;
3688 ifmgd->count_beacon_signal = 1;
3689 ifmgd->last_ave_beacon_signal = 0;
3691 ifmgd->count_beacon_signal++;
3694 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3696 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3697 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3698 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3699 int last_sig = ifmgd->last_ave_beacon_signal;
3700 struct ieee80211_event event = {
3705 * if signal crosses either of the boundaries, invoke callback
3706 * with appropriate parameters
3708 if (sig > ifmgd->rssi_max_thold &&
3709 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3710 ifmgd->last_ave_beacon_signal = sig;
3711 event.u.rssi.data = RSSI_EVENT_HIGH;
3712 drv_event_callback(local, sdata, &event);
3713 } else if (sig < ifmgd->rssi_min_thold &&
3714 (last_sig >= ifmgd->rssi_max_thold ||
3716 ifmgd->last_ave_beacon_signal = sig;
3717 event.u.rssi.data = RSSI_EVENT_LOW;
3718 drv_event_callback(local, sdata, &event);
3722 if (bss_conf->cqm_rssi_thold &&
3723 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3724 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3725 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3726 int last_event = ifmgd->last_cqm_event_signal;
3727 int thold = bss_conf->cqm_rssi_thold;
3728 int hyst = bss_conf->cqm_rssi_hyst;
3731 (last_event == 0 || sig < last_event - hyst)) {
3732 ifmgd->last_cqm_event_signal = sig;
3733 ieee80211_cqm_rssi_notify(
3735 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3737 } else if (sig > thold &&
3738 (last_event == 0 || sig > last_event + hyst)) {
3739 ifmgd->last_cqm_event_signal = sig;
3740 ieee80211_cqm_rssi_notify(
3742 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3747 if (bss_conf->cqm_rssi_low &&
3748 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3749 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3750 int last_event = ifmgd->last_cqm_event_signal;
3751 int low = bss_conf->cqm_rssi_low;
3752 int high = bss_conf->cqm_rssi_high;
3755 (last_event == 0 || last_event >= low)) {
3756 ifmgd->last_cqm_event_signal = sig;
3757 ieee80211_cqm_rssi_notify(
3759 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3761 } else if (sig > high &&
3762 (last_event == 0 || last_event <= high)) {
3763 ifmgd->last_cqm_event_signal = sig;
3764 ieee80211_cqm_rssi_notify(
3766 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3772 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3773 struct cfg80211_bss *bss)
3775 if (ether_addr_equal(tx_bssid, bss->bssid))
3777 if (!bss->transmitted_bss)
3779 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3782 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3783 struct ieee80211_mgmt *mgmt, size_t len,
3784 struct ieee80211_rx_status *rx_status)
3786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3787 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3789 struct ieee802_11_elems elems;
3790 struct ieee80211_local *local = sdata->local;
3791 struct ieee80211_chanctx_conf *chanctx_conf;
3792 struct ieee80211_channel *chan;
3793 struct sta_info *sta;
3799 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3801 sdata_assert_lock(sdata);
3803 /* Process beacon from the current BSS */
3804 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3809 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3810 if (!chanctx_conf) {
3815 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3819 chan = chanctx_conf->def.chan;
3822 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3823 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3824 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3825 len - baselen, false, &elems,
3827 ifmgd->assoc_data->bss->bssid);
3829 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3831 if (elems.dtim_period)
3832 ifmgd->dtim_period = elems.dtim_period;
3833 ifmgd->have_beacon = true;
3834 ifmgd->assoc_data->need_beacon = false;
3835 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3836 sdata->vif.bss_conf.sync_tsf =
3837 le64_to_cpu(mgmt->u.beacon.timestamp);
3838 sdata->vif.bss_conf.sync_device_ts =
3839 rx_status->device_timestamp;
3840 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3843 if (elems.mbssid_config_ie)
3844 bss_conf->profile_periodicity =
3845 elems.mbssid_config_ie->profile_periodicity;
3847 if (elems.ext_capab_len >= 11 &&
3848 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3849 bss_conf->ema_ap = true;
3851 /* continue assoc process */
3852 ifmgd->assoc_data->timeout = jiffies;
3853 ifmgd->assoc_data->timeout_started = true;
3854 run_again(sdata, ifmgd->assoc_data->timeout);
3858 if (!ifmgd->associated ||
3859 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated))
3861 bssid = ifmgd->associated->bssid;
3863 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3864 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3867 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3868 mlme_dbg_ratelimited(sdata,
3869 "cancelling AP probe due to a received beacon\n");
3870 ieee80211_reset_ap_probe(sdata);
3874 * Push the beacon loss detection into the future since
3875 * we are processing a beacon from the AP just now.
3877 ieee80211_sta_reset_beacon_monitor(sdata);
3879 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3880 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3881 len - baselen, false, &elems,
3882 care_about_ies, ncrc,
3883 mgmt->bssid, bssid);
3885 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3886 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3887 if (local->hw.conf.dynamic_ps_timeout > 0) {
3888 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3889 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3890 ieee80211_hw_config(local,
3891 IEEE80211_CONF_CHANGE_PS);
3893 ieee80211_send_nullfunc(local, sdata, false);
3894 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3895 local->pspolling = true;
3898 * Here is assumed that the driver will be
3899 * able to send ps-poll frame and receive a
3900 * response even though power save mode is
3901 * enabled, but some drivers might require
3902 * to disable power save here. This needs
3903 * to be investigated.
3905 ieee80211_send_pspoll(local, sdata);
3909 if (sdata->vif.p2p ||
3910 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3911 struct ieee80211_p2p_noa_attr noa = {};
3914 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3916 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3917 (u8 *) &noa, sizeof(noa));
3919 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3920 /* valid noa_attr and index changed */
3921 sdata->u.mgd.p2p_noa_index = noa.index;
3922 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3923 changed |= BSS_CHANGED_P2P_PS;
3925 * make sure we update all information, the CRC
3926 * mechanism doesn't look at P2P attributes.
3928 ifmgd->beacon_crc_valid = false;
3930 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3931 /* noa_attr not found and we had valid noa_attr before */
3932 sdata->u.mgd.p2p_noa_index = -1;
3933 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3934 changed |= BSS_CHANGED_P2P_PS;
3935 ifmgd->beacon_crc_valid = false;
3939 if (ifmgd->csa_waiting_bcn)
3940 ieee80211_chswitch_post_beacon(sdata);
3943 * Update beacon timing and dtim count on every beacon appearance. This
3944 * will allow the driver to use the most updated values. Do it before
3945 * comparing this one with last received beacon.
3946 * IMPORTANT: These parameters would possibly be out of sync by the time
3947 * the driver will use them. The synchronized view is currently
3948 * guaranteed only in certain callbacks.
3950 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3951 sdata->vif.bss_conf.sync_tsf =
3952 le64_to_cpu(mgmt->u.beacon.timestamp);
3953 sdata->vif.bss_conf.sync_device_ts =
3954 rx_status->device_timestamp;
3955 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3958 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3960 ifmgd->beacon_crc = ncrc;
3961 ifmgd->beacon_crc_valid = true;
3963 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3965 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3966 rx_status->device_timestamp,
3969 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3970 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3971 elems.wmm_param_len,
3972 elems.mu_edca_param_set))
3973 changed |= BSS_CHANGED_QOS;
3976 * If we haven't had a beacon before, tell the driver about the
3977 * DTIM period (and beacon timing if desired) now.
3979 if (!ifmgd->have_beacon) {
3980 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3981 bss_conf->dtim_period = elems.dtim_period ?: 1;
3983 changed |= BSS_CHANGED_BEACON_INFO;
3984 ifmgd->have_beacon = true;
3986 mutex_lock(&local->iflist_mtx);
3987 ieee80211_recalc_ps(local);
3988 mutex_unlock(&local->iflist_mtx);
3990 ieee80211_recalc_ps_vif(sdata);
3993 if (elems.erp_info) {
3995 erp_value = elems.erp_info[0];
3999 changed |= ieee80211_handle_bss_capability(sdata,
4000 le16_to_cpu(mgmt->u.beacon.capab_info),
4001 erp_valid, erp_value);
4003 mutex_lock(&local->sta_mtx);
4004 sta = sta_info_get(sdata, bssid);
4006 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems);
4008 if (ieee80211_config_bw(sdata, sta,
4009 elems.ht_cap_elem, elems.ht_operation,
4010 elems.vht_operation, elems.he_operation,
4012 mutex_unlock(&local->sta_mtx);
4014 "failed to follow AP %pM bandwidth change, disconnect\n",
4016 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4017 WLAN_REASON_DEAUTH_LEAVING,
4019 ieee80211_report_disconnect(sdata, deauth_buf,
4020 sizeof(deauth_buf), true,
4021 WLAN_REASON_DEAUTH_LEAVING);
4025 if (sta && elems.opmode_notif)
4026 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4028 mutex_unlock(&local->sta_mtx);
4030 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4032 elems.country_elem_len,
4033 elems.pwr_constr_elem,
4034 elems.cisco_dtpc_elem);
4036 ieee80211_bss_info_change_notify(sdata, changed);
4039 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4040 struct sk_buff *skb)
4042 struct ieee80211_rx_status *rx_status;
4043 struct ieee80211_mgmt *mgmt;
4045 struct ieee802_11_elems elems;
4048 rx_status = (struct ieee80211_rx_status *) skb->cb;
4049 mgmt = (struct ieee80211_mgmt *) skb->data;
4050 fc = le16_to_cpu(mgmt->frame_control);
4054 switch (fc & IEEE80211_FCTL_STYPE) {
4055 case IEEE80211_STYPE_BEACON:
4056 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4058 case IEEE80211_STYPE_PROBE_RESP:
4059 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4061 case IEEE80211_STYPE_AUTH:
4062 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4064 case IEEE80211_STYPE_DEAUTH:
4065 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4067 case IEEE80211_STYPE_DISASSOC:
4068 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4070 case IEEE80211_STYPE_ASSOC_RESP:
4071 case IEEE80211_STYPE_REASSOC_RESP:
4072 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4074 case IEEE80211_STYPE_ACTION:
4075 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4076 ies_len = skb->len -
4077 offsetof(struct ieee80211_mgmt,
4078 u.action.u.chan_switch.variable);
4083 /* CSA IE cannot be overridden, no need for BSSID */
4084 ieee802_11_parse_elems(
4085 mgmt->u.action.u.chan_switch.variable,
4086 ies_len, true, &elems, mgmt->bssid, NULL);
4088 if (elems.parse_error)
4091 ieee80211_sta_process_chanswitch(sdata,
4093 rx_status->device_timestamp,
4095 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4096 ies_len = skb->len -
4097 offsetof(struct ieee80211_mgmt,
4098 u.action.u.ext_chan_switch.variable);
4104 * extended CSA IE can't be overridden, no need for
4107 ieee802_11_parse_elems(
4108 mgmt->u.action.u.ext_chan_switch.variable,
4109 ies_len, true, &elems, mgmt->bssid, NULL);
4111 if (elems.parse_error)
4114 /* for the handling code pretend this was also an IE */
4115 elems.ext_chansw_ie =
4116 &mgmt->u.action.u.ext_chan_switch.data;
4118 ieee80211_sta_process_chanswitch(sdata,
4120 rx_status->device_timestamp,
4125 sdata_unlock(sdata);
4128 static void ieee80211_sta_timer(struct timer_list *t)
4130 struct ieee80211_sub_if_data *sdata =
4131 from_timer(sdata, t, u.mgd.timer);
4133 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4136 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4137 u8 *bssid, u8 reason, bool tx)
4139 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4141 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4144 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4148 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4150 struct ieee80211_local *local = sdata->local;
4151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4152 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4156 u16 prepare_tx_duration = 0;
4158 sdata_assert_lock(sdata);
4160 if (WARN_ON_ONCE(!auth_data))
4165 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4166 sdata_info(sdata, "authentication with %pM timed out\n",
4167 auth_data->bss->bssid);
4170 * Most likely AP is not in the range so remove the
4171 * bss struct for that AP.
4173 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4178 if (auth_data->algorithm == WLAN_AUTH_SAE)
4179 prepare_tx_duration =
4180 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4182 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4184 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4185 auth_data->bss->bssid, auth_data->tries,
4186 IEEE80211_AUTH_MAX_TRIES);
4188 auth_data->expected_transaction = 2;
4190 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4191 trans = auth_data->sae_trans;
4192 status = auth_data->sae_status;
4193 auth_data->expected_transaction = trans;
4196 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4197 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4198 IEEE80211_TX_INTFL_MLME_CONN_TX;
4200 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4201 auth_data->data, auth_data->data_len,
4202 auth_data->bss->bssid,
4203 auth_data->bss->bssid, NULL, 0, 0,
4206 if (tx_flags == 0) {
4207 if (auth_data->algorithm == WLAN_AUTH_SAE)
4208 auth_data->timeout = jiffies +
4209 IEEE80211_AUTH_TIMEOUT_SAE;
4211 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4213 auth_data->timeout =
4214 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4217 auth_data->timeout_started = true;
4218 run_again(sdata, auth_data->timeout);
4223 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4225 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4226 struct ieee80211_local *local = sdata->local;
4228 sdata_assert_lock(sdata);
4230 assoc_data->tries++;
4231 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4232 sdata_info(sdata, "association with %pM timed out\n",
4233 assoc_data->bss->bssid);
4236 * Most likely AP is not in the range so remove the
4237 * bss struct for that AP.
4239 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4244 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4245 assoc_data->bss->bssid, assoc_data->tries,
4246 IEEE80211_ASSOC_MAX_TRIES);
4247 ieee80211_send_assoc(sdata);
4249 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4250 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4251 assoc_data->timeout_started = true;
4252 run_again(sdata, assoc_data->timeout);
4254 assoc_data->timeout =
4255 round_jiffies_up(jiffies +
4256 IEEE80211_ASSOC_TIMEOUT_LONG);
4257 assoc_data->timeout_started = true;
4258 run_again(sdata, assoc_data->timeout);
4264 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4265 __le16 fc, bool acked)
4267 struct ieee80211_local *local = sdata->local;
4269 sdata->u.mgd.status_fc = fc;
4270 sdata->u.mgd.status_acked = acked;
4271 sdata->u.mgd.status_received = true;
4273 ieee80211_queue_work(&local->hw, &sdata->work);
4276 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4278 struct ieee80211_local *local = sdata->local;
4279 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4283 if (ifmgd->status_received) {
4284 __le16 fc = ifmgd->status_fc;
4285 bool status_acked = ifmgd->status_acked;
4287 ifmgd->status_received = false;
4288 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4290 if (ifmgd->auth_data->algorithm ==
4292 ifmgd->auth_data->timeout =
4294 IEEE80211_AUTH_TIMEOUT_SAE;
4296 ifmgd->auth_data->timeout =
4298 IEEE80211_AUTH_TIMEOUT_SHORT;
4299 run_again(sdata, ifmgd->auth_data->timeout);
4301 ifmgd->auth_data->timeout = jiffies - 1;
4303 ifmgd->auth_data->timeout_started = true;
4304 } else if (ifmgd->assoc_data &&
4305 (ieee80211_is_assoc_req(fc) ||
4306 ieee80211_is_reassoc_req(fc))) {
4308 ifmgd->assoc_data->timeout =
4309 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4310 run_again(sdata, ifmgd->assoc_data->timeout);
4312 ifmgd->assoc_data->timeout = jiffies - 1;
4314 ifmgd->assoc_data->timeout_started = true;
4318 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4319 time_after(jiffies, ifmgd->auth_data->timeout)) {
4320 if (ifmgd->auth_data->done) {
4322 * ok ... we waited for assoc but userspace didn't,
4323 * so let's just kill the auth data
4325 ieee80211_destroy_auth_data(sdata, false);
4326 } else if (ieee80211_auth(sdata)) {
4328 struct ieee80211_event event = {
4330 .u.mlme.data = AUTH_EVENT,
4331 .u.mlme.status = MLME_TIMEOUT,
4334 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4336 ieee80211_destroy_auth_data(sdata, false);
4338 cfg80211_auth_timeout(sdata->dev, bssid);
4339 drv_event_callback(sdata->local, sdata, &event);
4341 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4342 run_again(sdata, ifmgd->auth_data->timeout);
4344 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4345 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4346 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4347 ieee80211_do_assoc(sdata)) {
4348 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4349 struct ieee80211_event event = {
4351 .u.mlme.data = ASSOC_EVENT,
4352 .u.mlme.status = MLME_TIMEOUT,
4355 ieee80211_destroy_assoc_data(sdata, false, false);
4356 cfg80211_assoc_timeout(sdata->dev, bss);
4357 drv_event_callback(sdata->local, sdata, &event);
4359 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4360 run_again(sdata, ifmgd->assoc_data->timeout);
4362 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4363 ifmgd->associated) {
4367 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4369 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4370 max_tries = max_nullfunc_tries;
4372 max_tries = max_probe_tries;
4374 /* ACK received for nullfunc probing frame */
4375 if (!ifmgd->probe_send_count)
4376 ieee80211_reset_ap_probe(sdata);
4377 else if (ifmgd->nullfunc_failed) {
4378 if (ifmgd->probe_send_count < max_tries) {
4380 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4381 bssid, ifmgd->probe_send_count,
4383 ieee80211_mgd_probe_ap_send(sdata);
4386 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4388 ieee80211_sta_connection_lost(sdata, bssid,
4389 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4392 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4393 run_again(sdata, ifmgd->probe_timeout);
4394 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4396 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4397 bssid, probe_wait_ms);
4398 ieee80211_sta_connection_lost(sdata, bssid,
4399 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4400 } else if (ifmgd->probe_send_count < max_tries) {
4402 "No probe response from AP %pM after %dms, try %d/%i\n",
4403 bssid, probe_wait_ms,
4404 ifmgd->probe_send_count, max_tries);
4405 ieee80211_mgd_probe_ap_send(sdata);
4408 * We actually lost the connection ... or did we?
4412 "No probe response from AP %pM after %dms, disconnecting.\n",
4413 bssid, probe_wait_ms);
4415 ieee80211_sta_connection_lost(sdata, bssid,
4416 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4420 sdata_unlock(sdata);
4423 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4425 struct ieee80211_sub_if_data *sdata =
4426 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4427 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4429 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4432 sdata->u.mgd.connection_loss = false;
4433 ieee80211_queue_work(&sdata->local->hw,
4434 &sdata->u.mgd.beacon_connection_loss_work);
4437 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4439 struct ieee80211_sub_if_data *sdata =
4440 from_timer(sdata, t, u.mgd.conn_mon_timer);
4441 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4442 struct ieee80211_local *local = sdata->local;
4444 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4447 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4450 static void ieee80211_sta_monitor_work(struct work_struct *work)
4452 struct ieee80211_sub_if_data *sdata =
4453 container_of(work, struct ieee80211_sub_if_data,
4454 u.mgd.monitor_work);
4456 ieee80211_mgd_probe_ap(sdata, false);
4459 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4461 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4462 __ieee80211_stop_poll(sdata);
4464 /* let's probe the connection once */
4465 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4466 ieee80211_queue_work(&sdata->local->hw,
4467 &sdata->u.mgd.monitor_work);
4472 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4474 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4475 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4479 if (ifmgd->auth_data || ifmgd->assoc_data) {
4480 const u8 *bssid = ifmgd->auth_data ?
4481 ifmgd->auth_data->bss->bssid :
4482 ifmgd->assoc_data->bss->bssid;
4485 * If we are trying to authenticate / associate while suspending,
4486 * cfg80211 won't know and won't actually abort those attempts,
4487 * thus we need to do that ourselves.
4489 ieee80211_send_deauth_disassoc(sdata, bssid,
4490 IEEE80211_STYPE_DEAUTH,
4491 WLAN_REASON_DEAUTH_LEAVING,
4493 if (ifmgd->assoc_data)
4494 ieee80211_destroy_assoc_data(sdata, false, true);
4495 if (ifmgd->auth_data)
4496 ieee80211_destroy_auth_data(sdata, false);
4497 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4498 IEEE80211_DEAUTH_FRAME_LEN);
4501 /* This is a bit of a hack - we should find a better and more generic
4502 * solution to this. Normally when suspending, cfg80211 will in fact
4503 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4504 * auth (not so important) or assoc (this is the problem) process.
4506 * As a consequence, it can happen that we are in the process of both
4507 * associating and suspending, and receive an association response
4508 * after cfg80211 has checked if it needs to disconnect, but before
4509 * we actually set the flag to drop incoming frames. This will then
4510 * cause the workqueue flush to process the association response in
4511 * the suspend, resulting in a successful association just before it
4512 * tries to remove the interface from the driver, which now though
4513 * has a channel context assigned ... this results in issues.
4515 * To work around this (for now) simply deauth here again if we're
4518 if (ifmgd->associated && !sdata->local->wowlan) {
4520 struct cfg80211_deauth_request req = {
4521 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4525 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4526 ieee80211_mgd_deauth(sdata, &req);
4529 sdata_unlock(sdata);
4532 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4534 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4537 if (!ifmgd->associated) {
4538 sdata_unlock(sdata);
4542 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4543 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4544 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4545 ieee80211_sta_connection_lost(sdata,
4546 ifmgd->associated->bssid,
4547 WLAN_REASON_UNSPECIFIED,
4549 sdata_unlock(sdata);
4552 sdata_unlock(sdata);
4556 /* interface setup */
4557 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4559 struct ieee80211_if_managed *ifmgd;
4561 ifmgd = &sdata->u.mgd;
4562 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4563 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4564 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4565 ieee80211_beacon_connection_loss_work);
4566 INIT_WORK(&ifmgd->csa_connection_drop_work,
4567 ieee80211_csa_connection_drop_work);
4568 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4569 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4570 ieee80211_tdls_peer_del_work);
4571 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4572 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4573 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4574 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4575 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4576 ieee80211_sta_handle_tspec_ac_params_wk);
4579 ifmgd->powersave = sdata->wdev.ps;
4580 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4581 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4582 ifmgd->p2p_noa_index = -1;
4584 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4585 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4587 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4589 /* Setup TDLS data */
4590 spin_lock_init(&ifmgd->teardown_lock);
4591 ifmgd->teardown_skb = NULL;
4592 ifmgd->orig_teardown_skb = NULL;
4595 /* scan finished notification */
4596 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4598 struct ieee80211_sub_if_data *sdata;
4600 /* Restart STA timers */
4602 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4603 if (ieee80211_sdata_running(sdata))
4604 ieee80211_restart_sta_timer(sdata);
4609 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4610 struct cfg80211_bss *cbss)
4612 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4613 const u8 *ht_cap_ie, *vht_cap_ie;
4614 const struct ieee80211_ht_cap *ht_cap;
4615 const struct ieee80211_vht_cap *vht_cap;
4618 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4621 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4622 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4623 ht_cap = (void *)(ht_cap_ie + 2);
4624 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4626 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4627 * "Tx Unequal Modulation Supported" fields.
4631 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4634 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4635 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4639 vht_cap = (void *)(vht_cap_ie + 2);
4640 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4641 for (nss = 8; nss > 0; nss--) {
4642 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4643 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4646 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4647 chains = max(chains, nss);
4654 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4655 const struct ieee80211_he_operation *he_op)
4657 const struct ieee80211_sta_he_cap *sta_he_cap =
4658 ieee80211_get_he_sta_cap(sband);
4662 if (!sta_he_cap || !he_op)
4665 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4667 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4668 for (i = 0; i < 3; i++) {
4669 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4670 &sta_he_cap->he_mcs_nss_supp;
4671 u16 sta_mcs_map_rx =
4672 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4673 u16 sta_mcs_map_tx =
4674 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4676 bool verified = true;
4679 * For each band there is a maximum of 8 spatial streams
4680 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4681 * of 2 bits per NSS (1-8), with the values defined in enum
4682 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4683 * capabilities aren't less than the AP's minimum requirements
4684 * for this HE BSS per SS.
4685 * It is enough to find one such band that meets the reqs.
4687 for (nss = 8; nss > 0; nss--) {
4688 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4689 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4690 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4692 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4696 * Make sure the HE AP doesn't require MCSs that aren't
4697 * supported by the client
4699 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4700 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4701 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4711 /* If here, STA doesn't meet AP's HE min requirements */
4715 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4716 struct cfg80211_bss *cbss)
4718 struct ieee80211_local *local = sdata->local;
4719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4720 const struct ieee80211_ht_cap *ht_cap = NULL;
4721 const struct ieee80211_ht_operation *ht_oper = NULL;
4722 const struct ieee80211_vht_operation *vht_oper = NULL;
4723 const struct ieee80211_he_operation *he_oper = NULL;
4724 struct ieee80211_supported_band *sband;
4725 struct cfg80211_chan_def chandef;
4730 sband = local->hw.wiphy->bands[cbss->channel->band];
4732 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4733 IEEE80211_STA_DISABLE_80P80MHZ |
4734 IEEE80211_STA_DISABLE_160MHZ);
4738 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4739 sband->ht_cap.ht_supported) {
4740 const u8 *ht_oper_ie, *ht_cap_ie;
4742 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4743 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4744 ht_oper = (void *)(ht_oper_ie + 2);
4746 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4747 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4748 ht_cap = (void *)(ht_cap_ie + 2);
4751 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4756 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4757 sband->vht_cap.vht_supported) {
4758 const u8 *vht_oper_ie, *vht_cap;
4760 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4761 WLAN_EID_VHT_OPERATION);
4762 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4763 vht_oper = (void *)(vht_oper_ie + 2);
4764 if (vht_oper && !ht_oper) {
4767 "AP advertised VHT without HT, disabling both\n");
4768 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4769 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4772 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4773 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4774 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4779 if (!ieee80211_get_he_sta_cap(sband))
4780 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4782 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4783 const struct cfg80211_bss_ies *ies;
4784 const u8 *he_oper_ie;
4786 ies = rcu_dereference(cbss->ies);
4787 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4788 ies->data, ies->len);
4790 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4791 he_oper = (void *)(he_oper_ie + 3);
4795 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4796 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4799 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4801 for (i = 0; i < sband->n_channels; i++) {
4802 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4803 IEEE80211_CHAN_NO_80MHZ))
4811 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4813 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4815 ht_oper, vht_oper, he_oper,
4818 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4823 /* will change later if needed */
4824 sdata->smps_mode = IEEE80211_SMPS_OFF;
4826 mutex_lock(&local->mtx);
4828 * If this fails (possibly due to channel context sharing
4829 * on incompatible channels, e.g. 80+80 and 160 sharing the
4830 * same control channel) try to use a smaller bandwidth.
4832 ret = ieee80211_vif_use_channel(sdata, &chandef,
4833 IEEE80211_CHANCTX_SHARED);
4835 /* don't downgrade for 5 and 10 MHz channels, though. */
4836 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4837 chandef.width == NL80211_CHAN_WIDTH_10)
4840 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4841 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4842 ret = ieee80211_vif_use_channel(sdata, &chandef,
4843 IEEE80211_CHANCTX_SHARED);
4846 mutex_unlock(&local->mtx);
4850 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4851 u8 *dtim_count, u8 *dtim_period)
4853 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4854 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4856 const struct ieee80211_tim_ie *tim = NULL;
4857 const struct ieee80211_bssid_index *idx;
4858 bool valid = tim_ie && tim_ie[1] >= 2;
4861 tim = (void *)(tim_ie + 2);
4864 *dtim_count = valid ? tim->dtim_count : 0;
4867 *dtim_period = valid ? tim->dtim_period : 0;
4869 /* Check if value is overridden by non-transmitted profile */
4870 if (!idx_ie || idx_ie[1] < 3)
4873 idx = (void *)(idx_ie + 2);
4876 *dtim_count = idx->dtim_count;
4879 *dtim_period = idx->dtim_period;
4884 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4885 struct cfg80211_bss *cbss, bool assoc,
4888 struct ieee80211_local *local = sdata->local;
4889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4890 struct ieee80211_bss *bss = (void *)cbss->priv;
4891 struct sta_info *new_sta = NULL;
4892 struct ieee80211_supported_band *sband;
4893 bool have_sta = false;
4896 sband = local->hw.wiphy->bands[cbss->channel->band];
4898 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4901 /* If a reconfig is happening, bail out */
4902 if (local->in_reconfig)
4907 have_sta = sta_info_get(sdata, cbss->bssid);
4912 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4918 * Set up the information for the new channel before setting the
4919 * new channel. We can't - completely race-free - change the basic
4920 * rates bitmap and the channel (sband) that it refers to, but if
4921 * we set it up before we at least avoid calling into the driver's
4922 * bss_info_changed() method with invalid information (since we do
4923 * call that from changing the channel - only for IDLE and perhaps
4924 * some others, but ...).
4926 * So to avoid that, just set up all the new information before the
4927 * channel, but tell the driver to apply it only afterwards, since
4928 * it might need the new channel for that.
4931 u32 rates = 0, basic_rates = 0;
4932 bool have_higher_than_11mbit;
4933 int min_rate = INT_MAX, min_rate_index = -1;
4934 const struct cfg80211_bss_ies *ies;
4935 int shift = ieee80211_vif_get_shift(&sdata->vif);
4937 ieee80211_get_rates(sband, bss->supp_rates,
4938 bss->supp_rates_len,
4939 &rates, &basic_rates,
4940 &have_higher_than_11mbit,
4941 &min_rate, &min_rate_index,
4945 * This used to be a workaround for basic rates missing
4946 * in the association response frame. Now that we no
4947 * longer use the basic rates from there, it probably
4948 * doesn't happen any more, but keep the workaround so
4949 * in case some *other* APs are buggy in different ways
4950 * we can connect -- with a warning.
4952 if (!basic_rates && min_rate_index >= 0) {
4954 "No basic rates, using min rate instead\n");
4955 basic_rates = BIT(min_rate_index);
4958 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4959 sdata->vif.bss_conf.basic_rates = basic_rates;
4961 /* cf. IEEE 802.11 9.2.12 */
4962 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4963 have_higher_than_11mbit)
4964 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4966 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4968 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4970 /* set timing information */
4971 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4973 ies = rcu_dereference(cbss->beacon_ies);
4975 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4976 sdata->vif.bss_conf.sync_device_ts =
4977 bss->device_ts_beacon;
4979 ieee80211_get_dtim(ies,
4980 &sdata->vif.bss_conf.sync_dtim_count,
4982 } else if (!ieee80211_hw_check(&sdata->local->hw,
4983 TIMING_BEACON_ONLY)) {
4984 ies = rcu_dereference(cbss->proberesp_ies);
4985 /* must be non-NULL since beacon IEs were NULL */
4986 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4987 sdata->vif.bss_conf.sync_device_ts =
4988 bss->device_ts_presp;
4989 sdata->vif.bss_conf.sync_dtim_count = 0;
4991 sdata->vif.bss_conf.sync_tsf = 0;
4992 sdata->vif.bss_conf.sync_device_ts = 0;
4993 sdata->vif.bss_conf.sync_dtim_count = 0;
4998 if (new_sta || override) {
4999 err = ieee80211_prep_channel(sdata, cbss);
5002 sta_info_free(local, new_sta);
5009 * tell driver about BSSID, basic rates and timing
5010 * this was set up above, before setting the channel
5012 ieee80211_bss_info_change_notify(sdata,
5013 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5014 BSS_CHANGED_BEACON_INT);
5017 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5019 err = sta_info_insert(new_sta);
5023 "failed to insert STA entry for the AP (error %d)\n",
5028 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5030 /* Cancel scan to ensure that nothing interferes with connection */
5031 if (local->scanning)
5032 ieee80211_scan_cancel(local);
5038 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5039 struct cfg80211_auth_request *req)
5041 struct ieee80211_local *local = sdata->local;
5042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5043 struct ieee80211_mgd_auth_data *auth_data;
5048 /* prepare auth data structure */
5050 switch (req->auth_type) {
5051 case NL80211_AUTHTYPE_OPEN_SYSTEM:
5052 auth_alg = WLAN_AUTH_OPEN;
5054 case NL80211_AUTHTYPE_SHARED_KEY:
5055 if (IS_ERR(local->wep_tx_tfm))
5057 auth_alg = WLAN_AUTH_SHARED_KEY;
5059 case NL80211_AUTHTYPE_FT:
5060 auth_alg = WLAN_AUTH_FT;
5062 case NL80211_AUTHTYPE_NETWORK_EAP:
5063 auth_alg = WLAN_AUTH_LEAP;
5065 case NL80211_AUTHTYPE_SAE:
5066 auth_alg = WLAN_AUTH_SAE;
5068 case NL80211_AUTHTYPE_FILS_SK:
5069 auth_alg = WLAN_AUTH_FILS_SK;
5071 case NL80211_AUTHTYPE_FILS_SK_PFS:
5072 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5074 case NL80211_AUTHTYPE_FILS_PK:
5075 auth_alg = WLAN_AUTH_FILS_PK;
5081 if (ifmgd->assoc_data)
5084 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5085 req->ie_len, GFP_KERNEL);
5089 auth_data->bss = req->bss;
5091 if (req->auth_data_len >= 4) {
5092 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5093 __le16 *pos = (__le16 *) req->auth_data;
5095 auth_data->sae_trans = le16_to_cpu(pos[0]);
5096 auth_data->sae_status = le16_to_cpu(pos[1]);
5098 memcpy(auth_data->data, req->auth_data + 4,
5099 req->auth_data_len - 4);
5100 auth_data->data_len += req->auth_data_len - 4;
5103 /* Check if continuing authentication or trying to authenticate with the
5104 * same BSS that we were in the process of authenticating with and avoid
5105 * removal and re-addition of the STA entry in
5106 * ieee80211_prep_connection().
5108 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5110 if (req->ie && req->ie_len) {
5111 memcpy(&auth_data->data[auth_data->data_len],
5112 req->ie, req->ie_len);
5113 auth_data->data_len += req->ie_len;
5116 if (req->key && req->key_len) {
5117 auth_data->key_len = req->key_len;
5118 auth_data->key_idx = req->key_idx;
5119 memcpy(auth_data->key, req->key, req->key_len);
5122 auth_data->algorithm = auth_alg;
5124 /* try to authenticate/probe */
5126 if (ifmgd->auth_data) {
5127 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5128 auth_data->peer_confirmed =
5129 ifmgd->auth_data->peer_confirmed;
5131 ieee80211_destroy_auth_data(sdata, cont_auth);
5134 /* prep auth_data so we don't go into idle on disassoc */
5135 ifmgd->auth_data = auth_data;
5137 /* If this is continuation of an ongoing SAE authentication exchange
5138 * (i.e., request to send SAE Confirm) and the peer has already
5139 * confirmed, mark authentication completed since we are about to send
5142 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5143 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5144 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5146 if (ifmgd->associated) {
5147 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5150 "disconnect from AP %pM for new auth to %pM\n",
5151 ifmgd->associated->bssid, req->bss->bssid);
5152 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5153 WLAN_REASON_UNSPECIFIED,
5156 ieee80211_report_disconnect(sdata, frame_buf,
5157 sizeof(frame_buf), true,
5158 WLAN_REASON_UNSPECIFIED);
5161 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5163 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5167 err = ieee80211_auth(sdata);
5169 sta_info_destroy_addr(sdata, req->bss->bssid);
5173 /* hold our own reference */
5174 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5178 eth_zero_addr(ifmgd->bssid);
5179 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5180 ifmgd->auth_data = NULL;
5181 mutex_lock(&sdata->local->mtx);
5182 ieee80211_vif_release_channel(sdata);
5183 mutex_unlock(&sdata->local->mtx);
5188 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5189 struct cfg80211_assoc_request *req)
5191 struct ieee80211_local *local = sdata->local;
5192 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5193 struct ieee80211_bss *bss = (void *)req->bss->priv;
5194 struct ieee80211_mgd_assoc_data *assoc_data;
5195 const struct cfg80211_bss_ies *beacon_ies;
5196 struct ieee80211_supported_band *sband;
5197 const u8 *ssidie, *ht_ie, *vht_ie;
5199 bool override = false;
5201 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5206 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5212 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5213 assoc_data->ssid_len = ssidie[1];
5216 if (ifmgd->associated) {
5217 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5220 "disconnect from AP %pM for new assoc to %pM\n",
5221 ifmgd->associated->bssid, req->bss->bssid);
5222 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5223 WLAN_REASON_UNSPECIFIED,
5226 ieee80211_report_disconnect(sdata, frame_buf,
5227 sizeof(frame_buf), true,
5228 WLAN_REASON_UNSPECIFIED);
5231 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5236 if (ifmgd->assoc_data) {
5241 if (ifmgd->auth_data) {
5244 /* keep sta info, bssid if matching */
5245 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5246 ieee80211_destroy_auth_data(sdata, match);
5249 /* prepare assoc data */
5251 ifmgd->beacon_crc_valid = false;
5253 assoc_data->wmm = bss->wmm_used &&
5254 (local->hw.queues >= IEEE80211_NUM_ACS);
5257 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5258 * We still associate in non-HT mode (11a/b/g) if any one of these
5259 * ciphers is configured as pairwise.
5260 * We can set this to true for non-11n hardware, that'll be checked
5261 * separately along with the peer capabilities.
5263 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5264 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5265 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5266 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5267 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5268 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5269 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5270 netdev_info(sdata->dev,
5271 "disabling HE/HT/VHT due to WEP/TKIP use\n");
5275 /* Also disable HT if we don't support it or the AP doesn't use WMM */
5276 sband = local->hw.wiphy->bands[req->bss->channel->band];
5277 if (!sband->ht_cap.ht_supported ||
5278 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5279 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5280 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5281 if (!bss->wmm_used &&
5282 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5283 netdev_info(sdata->dev,
5284 "disabling HT as WMM/QoS is not supported by the AP\n");
5287 /* disable VHT if we don't support it or the AP doesn't use WMM */
5288 if (!sband->vht_cap.vht_supported ||
5289 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5290 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5291 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5292 if (!bss->wmm_used &&
5293 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5294 netdev_info(sdata->dev,
5295 "disabling VHT as WMM/QoS is not supported by the AP\n");
5298 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5299 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5300 sizeof(ifmgd->ht_capa_mask));
5302 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5303 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5304 sizeof(ifmgd->vht_capa_mask));
5306 if (req->ie && req->ie_len) {
5307 memcpy(assoc_data->ie, req->ie, req->ie_len);
5308 assoc_data->ie_len = req->ie_len;
5311 if (req->fils_kek) {
5312 /* should already be checked in cfg80211 - so warn */
5313 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5317 memcpy(assoc_data->fils_kek, req->fils_kek,
5319 assoc_data->fils_kek_len = req->fils_kek_len;
5322 if (req->fils_nonces)
5323 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5324 2 * FILS_NONCE_LEN);
5326 assoc_data->bss = req->bss;
5328 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5329 if (ifmgd->powersave)
5330 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5332 sdata->smps_mode = IEEE80211_SMPS_OFF;
5334 sdata->smps_mode = ifmgd->req_smps;
5336 assoc_data->capability = req->bss->capability;
5337 assoc_data->supp_rates = bss->supp_rates;
5338 assoc_data->supp_rates_len = bss->supp_rates_len;
5341 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5342 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5343 assoc_data->ap_ht_param =
5344 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5346 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5347 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5348 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5349 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5350 sizeof(struct ieee80211_vht_cap));
5352 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5355 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5356 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5357 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5358 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5360 if (bss->wmm_used && bss->uapsd_supported &&
5361 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5362 assoc_data->uapsd = true;
5363 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5365 assoc_data->uapsd = false;
5366 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5369 if (req->prev_bssid)
5370 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5373 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5374 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5376 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5377 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5380 if (req->flags & ASSOC_REQ_USE_RRM)
5381 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5383 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5385 if (req->crypto.control_port)
5386 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5388 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5390 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5391 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5392 sdata->control_port_over_nl80211 =
5393 req->crypto.control_port_over_nl80211;
5394 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5397 /* kick off associate process */
5399 ifmgd->assoc_data = assoc_data;
5400 ifmgd->dtim_period = 0;
5401 ifmgd->have_beacon = false;
5403 /* override HT/VHT configuration only if the AP and we support it */
5404 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5405 struct ieee80211_sta_ht_cap sta_ht_cap;
5407 if (req->flags & ASSOC_REQ_DISABLE_HT)
5410 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5411 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5413 /* check for 40 MHz disable override */
5414 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5415 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5416 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5419 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5420 req->flags & ASSOC_REQ_DISABLE_VHT)
5424 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5425 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5426 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5429 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5430 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5432 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5437 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5439 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5442 * Wait up to one beacon interval ...
5443 * should this be more if we miss one?
5445 sdata_info(sdata, "waiting for beacon from %pM\n",
5447 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5448 assoc_data->timeout_started = true;
5449 assoc_data->need_beacon = true;
5450 } else if (beacon_ies) {
5454 ieee80211_get_dtim(beacon_ies, &dtim_count,
5455 &ifmgd->dtim_period);
5457 ifmgd->have_beacon = true;
5458 assoc_data->timeout = jiffies;
5459 assoc_data->timeout_started = true;
5461 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5462 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5463 sdata->vif.bss_conf.sync_device_ts =
5464 bss->device_ts_beacon;
5465 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5468 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5469 beacon_ies->data, beacon_ies->len);
5470 if (ie && ie[1] >= 3)
5471 sdata->vif.bss_conf.profile_periodicity = ie[4];
5473 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5474 beacon_ies->data, beacon_ies->len);
5475 if (ie && ie[1] >= 11 &&
5476 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5477 sdata->vif.bss_conf.ema_ap = true;
5479 assoc_data->timeout = jiffies;
5480 assoc_data->timeout_started = true;
5484 run_again(sdata, assoc_data->timeout);
5486 if (bss->corrupt_data) {
5487 char *corrupt_type = "data";
5488 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5489 if (bss->corrupt_data &
5490 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5491 corrupt_type = "beacon and probe response";
5493 corrupt_type = "beacon";
5494 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5495 corrupt_type = "probe response";
5496 sdata_info(sdata, "associating with AP with corrupt %s\n",
5502 eth_zero_addr(ifmgd->bssid);
5503 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5504 ifmgd->assoc_data = NULL;
5510 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5511 struct cfg80211_deauth_request *req)
5513 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5514 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5515 bool tx = !req->local_state_change;
5517 if (ifmgd->auth_data &&
5518 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5520 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5521 req->bssid, req->reason_code,
5522 ieee80211_get_reason_code_string(req->reason_code));
5524 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5525 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5526 IEEE80211_STYPE_DEAUTH,
5527 req->reason_code, tx,
5529 ieee80211_destroy_auth_data(sdata, false);
5530 ieee80211_report_disconnect(sdata, frame_buf,
5531 sizeof(frame_buf), true,
5537 if (ifmgd->assoc_data &&
5538 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5540 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5541 req->bssid, req->reason_code,
5542 ieee80211_get_reason_code_string(req->reason_code));
5544 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5545 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5546 IEEE80211_STYPE_DEAUTH,
5547 req->reason_code, tx,
5549 ieee80211_destroy_assoc_data(sdata, false, true);
5550 ieee80211_report_disconnect(sdata, frame_buf,
5551 sizeof(frame_buf), true,
5556 if (ifmgd->associated &&
5557 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5559 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5560 req->bssid, req->reason_code,
5561 ieee80211_get_reason_code_string(req->reason_code));
5563 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5564 req->reason_code, tx, frame_buf);
5565 ieee80211_report_disconnect(sdata, frame_buf,
5566 sizeof(frame_buf), true,
5574 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5575 struct cfg80211_disassoc_request *req)
5577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5579 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5582 * cfg80211 should catch this ... but it's racy since
5583 * we can receive a disassoc frame, process it, hand it
5584 * to cfg80211 while that's in a locked section already
5585 * trying to tell us that the user wants to disconnect.
5587 if (ifmgd->associated != req->bss)
5591 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5592 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5594 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5595 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5596 req->reason_code, !req->local_state_change,
5599 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5605 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5610 * Make sure some work items will not run after this,
5611 * they will not do anything but might not have been
5612 * cancelled when disconnecting.
5614 cancel_work_sync(&ifmgd->monitor_work);
5615 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5616 cancel_work_sync(&ifmgd->request_smps_work);
5617 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5618 cancel_work_sync(&ifmgd->chswitch_work);
5619 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5622 if (ifmgd->assoc_data) {
5623 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5624 ieee80211_destroy_assoc_data(sdata, false, false);
5625 cfg80211_assoc_timeout(sdata->dev, bss);
5627 if (ifmgd->auth_data)
5628 ieee80211_destroy_auth_data(sdata, false);
5629 spin_lock_bh(&ifmgd->teardown_lock);
5630 if (ifmgd->teardown_skb) {
5631 kfree_skb(ifmgd->teardown_skb);
5632 ifmgd->teardown_skb = NULL;
5633 ifmgd->orig_teardown_skb = NULL;
5635 kfree(ifmgd->assoc_req_ies);
5636 ifmgd->assoc_req_ies = NULL;
5637 ifmgd->assoc_req_ies_len = 0;
5638 spin_unlock_bh(&ifmgd->teardown_lock);
5639 del_timer_sync(&ifmgd->timer);
5640 sdata_unlock(sdata);
5643 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5644 enum nl80211_cqm_rssi_threshold_event rssi_event,
5648 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5650 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5652 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5654 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5656 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5658 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5660 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5662 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5664 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);