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 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;
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);
755 *pos++ = WLAN_EID_SSID;
756 *pos++ = assoc_data->ssid_len;
757 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
759 /* add all rates which were marked to be used above */
760 supp_rates_len = rates_len;
761 if (supp_rates_len > 8)
764 pos = skb_put(skb, supp_rates_len + 2);
765 *pos++ = WLAN_EID_SUPP_RATES;
766 *pos++ = supp_rates_len;
769 for (i = 0; i < sband->n_bitrates; i++) {
770 if (BIT(i) & rates) {
771 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
779 if (rates_len > count) {
780 pos = skb_put(skb, rates_len - count + 2);
781 *pos++ = WLAN_EID_EXT_SUPP_RATES;
782 *pos++ = rates_len - count;
784 for (i++; i < sband->n_bitrates; i++) {
785 if (BIT(i) & rates) {
787 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
794 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
795 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
796 pos = skb_put(skb, 4);
797 *pos++ = WLAN_EID_PWR_CAPABILITY;
799 *pos++ = 0; /* min tx power */
801 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
804 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
805 /* TODO: get this in reg domain format */
806 pos = skb_put(skb, 2 * sband->n_channels + 2);
807 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
808 *pos++ = 2 * sband->n_channels;
809 for (i = 0; i < sband->n_channels; i++) {
810 *pos++ = ieee80211_frequency_to_channel(
811 sband->channels[i].center_freq);
812 *pos++ = 1; /* one channel in the subband*/
816 /* if present, add any custom IEs that go before HT */
817 if (assoc_data->ie_len) {
818 static const u8 before_ht[] = {
821 WLAN_EID_EXT_SUPP_RATES,
822 WLAN_EID_PWR_CAPABILITY,
823 WLAN_EID_SUPPORTED_CHANNELS,
826 WLAN_EID_RRM_ENABLED_CAPABILITIES,
827 WLAN_EID_MOBILITY_DOMAIN,
828 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
829 WLAN_EID_RIC_DATA, /* reassoc only */
830 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
832 static const u8 after_ric[] = {
833 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
834 WLAN_EID_HT_CAPABILITY,
835 WLAN_EID_BSS_COEX_2040,
836 /* luckily this is almost always there */
837 WLAN_EID_EXT_CAPABILITY,
838 WLAN_EID_QOS_TRAFFIC_CAPA,
839 WLAN_EID_TIM_BCAST_REQ,
840 WLAN_EID_INTERWORKING,
841 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
842 WLAN_EID_VHT_CAPABILITY,
843 WLAN_EID_OPMODE_NOTIF,
846 noffset = ieee80211_ie_split_ric(assoc_data->ie,
849 ARRAY_SIZE(before_ht),
851 ARRAY_SIZE(after_ric),
853 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
857 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
858 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
859 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
861 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
862 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
863 sband, chan, sdata->smps_mode);
865 /* if present, add any custom IEs that go before VHT */
866 if (assoc_data->ie_len) {
867 static const u8 before_vht[] = {
869 * no need to list the ones split off before HT
872 WLAN_EID_BSS_COEX_2040,
873 WLAN_EID_EXT_CAPABILITY,
874 WLAN_EID_QOS_TRAFFIC_CAPA,
875 WLAN_EID_TIM_BCAST_REQ,
876 WLAN_EID_INTERWORKING,
877 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
880 /* RIC already taken above, so no need to handle here anymore */
881 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
882 before_vht, ARRAY_SIZE(before_vht),
884 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
888 /* if present, add any custom IEs that go before HE */
889 if (assoc_data->ie_len) {
890 static const u8 before_he[] = {
892 * no need to list the ones split off before VHT
895 WLAN_EID_OPMODE_NOTIF,
896 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
898 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
899 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
900 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
901 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
902 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
903 /* TODO: add 11ah/11aj/11ak elements */
906 /* RIC already taken above, so no need to handle here anymore */
907 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
908 before_he, ARRAY_SIZE(before_he),
910 pos = skb_put(skb, noffset - offset);
911 memcpy(pos, assoc_data->ie + offset, noffset - offset);
915 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
916 ieee80211_add_vht_ie(sdata, skb, sband,
917 &assoc_data->ap_vht_cap);
920 * If AP doesn't support HT, mark HE as disabled.
921 * If on the 5GHz band, make sure it supports VHT.
923 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
924 (sband->band == NL80211_BAND_5GHZ &&
925 ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
926 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
928 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
929 ieee80211_add_he_ie(sdata, skb, sband);
931 /* if present, add any custom non-vendor IEs that go after HE */
932 if (assoc_data->ie_len) {
933 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
936 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
940 if (assoc_data->wmm) {
941 if (assoc_data->uapsd) {
942 qos_info = ifmgd->uapsd_queues;
943 qos_info |= (ifmgd->uapsd_max_sp_len <<
944 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
949 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
952 /* add any remaining custom (i.e. vendor specific here) IEs */
953 if (assoc_data->ie_len) {
954 noffset = assoc_data->ie_len;
955 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
958 if (assoc_data->fils_kek_len &&
959 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
964 drv_mgd_prepare_tx(local, sdata, 0);
966 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
967 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
968 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
969 IEEE80211_TX_INTFL_MLME_CONN_TX;
970 ieee80211_tx_skb(sdata, skb);
973 void ieee80211_send_pspoll(struct ieee80211_local *local,
974 struct ieee80211_sub_if_data *sdata)
976 struct ieee80211_pspoll *pspoll;
979 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
983 pspoll = (struct ieee80211_pspoll *) skb->data;
984 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
986 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
987 ieee80211_tx_skb(sdata, skb);
990 void ieee80211_send_nullfunc(struct ieee80211_local *local,
991 struct ieee80211_sub_if_data *sdata,
995 struct ieee80211_hdr_3addr *nullfunc;
996 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
998 /* Don't send NDPs when STA is connected HE */
999 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1000 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1003 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1004 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1008 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1010 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1012 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1013 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1015 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1016 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1018 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1019 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1021 ieee80211_tx_skb(sdata, skb);
1024 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1025 struct ieee80211_sub_if_data *sdata)
1027 struct sk_buff *skb;
1028 struct ieee80211_hdr *nullfunc;
1031 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1034 /* Don't send NDPs when connected HE */
1035 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1038 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1042 skb_reserve(skb, local->hw.extra_tx_headroom);
1044 nullfunc = skb_put_zero(skb, 30);
1045 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1046 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1047 nullfunc->frame_control = fc;
1048 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1049 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1050 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1051 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1053 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1054 ieee80211_tx_skb(sdata, skb);
1057 /* spectrum management related things */
1058 static void ieee80211_chswitch_work(struct work_struct *work)
1060 struct ieee80211_sub_if_data *sdata =
1061 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1062 struct ieee80211_local *local = sdata->local;
1063 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1066 if (!ieee80211_sdata_running(sdata))
1070 mutex_lock(&local->mtx);
1071 mutex_lock(&local->chanctx_mtx);
1073 if (!ifmgd->associated)
1076 if (!sdata->vif.csa_active)
1080 * using reservation isn't immediate as it may be deferred until later
1081 * with multi-vif. once reservation is complete it will re-schedule the
1082 * work with no reserved_chanctx so verify chandef to check if it
1083 * completed successfully
1086 if (sdata->reserved_chanctx) {
1087 struct ieee80211_supported_band *sband = NULL;
1088 struct sta_info *mgd_sta = NULL;
1089 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1092 * with multi-vif csa driver may call ieee80211_csa_finish()
1093 * many times while waiting for other interfaces to use their
1096 if (sdata->reserved_ready)
1099 if (sdata->vif.bss_conf.chandef.width !=
1100 sdata->csa_chandef.width) {
1102 * For managed interface, we need to also update the AP
1103 * station bandwidth and align the rate scale algorithm
1104 * on the bandwidth change. Here we only consider the
1105 * bandwidth of the new channel definition (as channel
1106 * switch flow does not have the full HT/VHT/HE
1107 * information), assuming that if additional changes are
1108 * required they would be done as part of the processing
1109 * of the next beacon from the AP.
1111 switch (sdata->csa_chandef.width) {
1112 case NL80211_CHAN_WIDTH_20_NOHT:
1113 case NL80211_CHAN_WIDTH_20:
1115 bw = IEEE80211_STA_RX_BW_20;
1117 case NL80211_CHAN_WIDTH_40:
1118 bw = IEEE80211_STA_RX_BW_40;
1120 case NL80211_CHAN_WIDTH_80:
1121 bw = IEEE80211_STA_RX_BW_80;
1123 case NL80211_CHAN_WIDTH_80P80:
1124 case NL80211_CHAN_WIDTH_160:
1125 bw = IEEE80211_STA_RX_BW_160;
1129 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1131 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1134 if (sdata->vif.bss_conf.chandef.width >
1135 sdata->csa_chandef.width) {
1136 mgd_sta->sta.bandwidth = bw;
1137 rate_control_rate_update(local, sband, mgd_sta,
1138 IEEE80211_RC_BW_CHANGED);
1141 ret = ieee80211_vif_use_reserved_context(sdata);
1144 "failed to use reserved channel context, disconnecting (err=%d)\n",
1146 ieee80211_queue_work(&sdata->local->hw,
1147 &ifmgd->csa_connection_drop_work);
1151 if (sdata->vif.bss_conf.chandef.width <
1152 sdata->csa_chandef.width) {
1153 mgd_sta->sta.bandwidth = bw;
1154 rate_control_rate_update(local, sband, mgd_sta,
1155 IEEE80211_RC_BW_CHANGED);
1161 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1162 &sdata->csa_chandef)) {
1164 "failed to finalize channel switch, disconnecting\n");
1165 ieee80211_queue_work(&sdata->local->hw,
1166 &ifmgd->csa_connection_drop_work);
1170 /* XXX: shouldn't really modify cfg80211-owned data! */
1171 ifmgd->associated->channel = sdata->csa_chandef.chan;
1173 ifmgd->csa_waiting_bcn = true;
1175 ieee80211_sta_reset_beacon_monitor(sdata);
1176 ieee80211_sta_reset_conn_monitor(sdata);
1179 mutex_unlock(&local->chanctx_mtx);
1180 mutex_unlock(&local->mtx);
1181 sdata_unlock(sdata);
1184 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1186 struct ieee80211_local *local = sdata->local;
1187 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1190 sdata_assert_lock(sdata);
1192 WARN_ON(!sdata->vif.csa_active);
1194 if (sdata->csa_block_tx) {
1195 ieee80211_wake_vif_queues(local, sdata,
1196 IEEE80211_QUEUE_STOP_REASON_CSA);
1197 sdata->csa_block_tx = false;
1200 sdata->vif.csa_active = false;
1201 ifmgd->csa_waiting_bcn = false;
1203 ret = drv_post_channel_switch(sdata);
1206 "driver post channel switch failed, disconnecting\n");
1207 ieee80211_queue_work(&local->hw,
1208 &ifmgd->csa_connection_drop_work);
1212 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1215 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1217 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1220 trace_api_chswitch_done(sdata, success);
1223 "driver channel switch failed, disconnecting\n");
1224 ieee80211_queue_work(&sdata->local->hw,
1225 &ifmgd->csa_connection_drop_work);
1227 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1230 EXPORT_SYMBOL(ieee80211_chswitch_done);
1232 static void ieee80211_chswitch_timer(struct timer_list *t)
1234 struct ieee80211_sub_if_data *sdata =
1235 from_timer(sdata, t, u.mgd.chswitch_timer);
1237 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1241 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1242 u64 timestamp, u32 device_timestamp,
1243 struct ieee802_11_elems *elems,
1246 struct ieee80211_local *local = sdata->local;
1247 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1248 struct cfg80211_bss *cbss = ifmgd->associated;
1249 struct ieee80211_chanctx_conf *conf;
1250 struct ieee80211_chanctx *chanctx;
1251 enum nl80211_band current_band;
1252 struct ieee80211_csa_ie csa_ie;
1253 struct ieee80211_channel_switch ch_switch;
1256 sdata_assert_lock(sdata);
1261 if (local->scanning)
1264 /* disregard subsequent announcements if we are already processing */
1265 if (sdata->vif.csa_active)
1268 current_band = cbss->channel->band;
1269 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1271 ifmgd->associated->bssid, &csa_ie);
1273 ieee80211_queue_work(&local->hw,
1274 &ifmgd->csa_connection_drop_work);
1278 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1279 IEEE80211_CHAN_DISABLED)) {
1281 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1282 ifmgd->associated->bssid,
1283 csa_ie.chandef.chan->center_freq,
1284 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1285 csa_ie.chandef.center_freq2);
1286 ieee80211_queue_work(&local->hw,
1287 &ifmgd->csa_connection_drop_work);
1291 if (cfg80211_chandef_identical(&csa_ie.chandef,
1292 &sdata->vif.bss_conf.chandef)) {
1293 if (ifmgd->csa_ignored_same_chan)
1296 "AP %pM tries to chanswitch to same channel, ignore\n",
1297 ifmgd->associated->bssid);
1298 ifmgd->csa_ignored_same_chan = true;
1303 * Drop all TDLS peers - either we disconnect or move to a different
1304 * channel from this point on. There's no telling what our peer will do.
1305 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1306 * have an incompatible wider chandef.
1308 ieee80211_teardown_tdls_peers(sdata);
1310 mutex_lock(&local->mtx);
1311 mutex_lock(&local->chanctx_mtx);
1312 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1313 lockdep_is_held(&local->chanctx_mtx));
1316 "no channel context assigned to vif?, disconnecting\n");
1317 goto drop_connection;
1320 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1322 if (local->use_chanctx &&
1323 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1325 "driver doesn't support chan-switch with channel contexts\n");
1326 goto drop_connection;
1329 ch_switch.timestamp = timestamp;
1330 ch_switch.device_timestamp = device_timestamp;
1331 ch_switch.block_tx = csa_ie.mode;
1332 ch_switch.chandef = csa_ie.chandef;
1333 ch_switch.count = csa_ie.count;
1335 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1337 "preparing for channel switch failed, disconnecting\n");
1338 goto drop_connection;
1341 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1342 chanctx->mode, false);
1345 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1347 goto drop_connection;
1349 mutex_unlock(&local->chanctx_mtx);
1351 sdata->vif.csa_active = true;
1352 sdata->csa_chandef = csa_ie.chandef;
1353 sdata->csa_block_tx = csa_ie.mode;
1354 ifmgd->csa_ignored_same_chan = false;
1356 if (sdata->csa_block_tx)
1357 ieee80211_stop_vif_queues(local, sdata,
1358 IEEE80211_QUEUE_STOP_REASON_CSA);
1359 mutex_unlock(&local->mtx);
1361 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1364 if (local->ops->channel_switch) {
1365 /* use driver's channel switch callback */
1366 drv_channel_switch(local, sdata, &ch_switch);
1370 /* channel switch handled in software */
1371 if (csa_ie.count <= 1)
1372 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1374 mod_timer(&ifmgd->chswitch_timer,
1375 TU_TO_EXP_TIME((csa_ie.count - 1) *
1376 cbss->beacon_interval));
1380 * This is just so that the disconnect flow will know that
1381 * we were trying to switch channel and failed. In case the
1382 * mode is 1 (we are not allowed to Tx), we will know not to
1383 * send a deauthentication frame. Those two fields will be
1384 * reset when the disconnection worker runs.
1386 sdata->vif.csa_active = true;
1387 sdata->csa_block_tx = csa_ie.mode;
1389 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1390 mutex_unlock(&local->chanctx_mtx);
1391 mutex_unlock(&local->mtx);
1395 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1396 struct ieee80211_channel *channel,
1397 const u8 *country_ie, u8 country_ie_len,
1398 const u8 *pwr_constr_elem,
1399 int *chan_pwr, int *pwr_reduction)
1401 struct ieee80211_country_ie_triplet *triplet;
1402 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1403 int i, chan_increment;
1404 bool have_chan_pwr = false;
1407 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1410 triplet = (void *)(country_ie + 3);
1411 country_ie_len -= 3;
1413 switch (channel->band) {
1417 case NL80211_BAND_2GHZ:
1418 case NL80211_BAND_60GHZ:
1421 case NL80211_BAND_5GHZ:
1427 while (country_ie_len >= 3) {
1428 u8 first_channel = triplet->chans.first_channel;
1430 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1433 for (i = 0; i < triplet->chans.num_channels; i++) {
1434 if (first_channel + i * chan_increment == chan) {
1435 have_chan_pwr = true;
1436 *chan_pwr = triplet->chans.max_power;
1445 country_ie_len -= 3;
1448 if (have_chan_pwr && pwr_constr_elem)
1449 *pwr_reduction = *pwr_constr_elem;
1453 return have_chan_pwr;
1456 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1457 struct ieee80211_channel *channel,
1458 const u8 *cisco_dtpc_ie,
1461 /* From practical testing, the first data byte of the DTPC element
1462 * seems to contain the requested dBm level, and the CLI on Cisco
1463 * APs clearly state the range is -127 to 127 dBm, which indicates
1464 * a signed byte, although it seemingly never actually goes negative.
1465 * The other byte seems to always be zero.
1467 *pwr_level = (__s8)cisco_dtpc_ie[4];
1470 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1471 struct ieee80211_channel *channel,
1472 struct ieee80211_mgmt *mgmt,
1473 const u8 *country_ie, u8 country_ie_len,
1474 const u8 *pwr_constr_ie,
1475 const u8 *cisco_dtpc_ie)
1477 bool has_80211h_pwr = false, has_cisco_pwr = false;
1478 int chan_pwr = 0, pwr_reduction_80211h = 0;
1479 int pwr_level_cisco, pwr_level_80211h;
1481 __le16 capab = mgmt->u.probe_resp.capab_info;
1484 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1485 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1486 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1487 sdata, channel, country_ie, country_ie_len,
1488 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1490 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1493 if (cisco_dtpc_ie) {
1494 ieee80211_find_cisco_dtpc(
1495 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1496 has_cisco_pwr = true;
1499 if (!has_80211h_pwr && !has_cisco_pwr)
1502 /* If we have both 802.11h and Cisco DTPC, apply both limits
1503 * by picking the smallest of the two power levels advertised.
1505 if (has_80211h_pwr &&
1506 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1507 new_ap_level = pwr_level_80211h;
1509 if (sdata->ap_power_level == new_ap_level)
1513 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1514 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1515 sdata->u.mgd.bssid);
1516 } else { /* has_cisco_pwr is always true here. */
1517 new_ap_level = pwr_level_cisco;
1519 if (sdata->ap_power_level == new_ap_level)
1523 "Limiting TX power to %d dBm as advertised by %pM\n",
1524 pwr_level_cisco, sdata->u.mgd.bssid);
1527 sdata->ap_power_level = new_ap_level;
1528 if (__ieee80211_recalc_txpower(sdata))
1529 return BSS_CHANGED_TXPOWER;
1534 static void ieee80211_enable_ps(struct ieee80211_local *local,
1535 struct ieee80211_sub_if_data *sdata)
1537 struct ieee80211_conf *conf = &local->hw.conf;
1540 * If we are scanning right now then the parameters will
1541 * take effect when scan finishes.
1543 if (local->scanning)
1546 if (conf->dynamic_ps_timeout > 0 &&
1547 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1548 mod_timer(&local->dynamic_ps_timer, jiffies +
1549 msecs_to_jiffies(conf->dynamic_ps_timeout));
1551 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1552 ieee80211_send_nullfunc(local, sdata, true);
1554 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1555 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1558 conf->flags |= IEEE80211_CONF_PS;
1559 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1563 static void ieee80211_change_ps(struct ieee80211_local *local)
1565 struct ieee80211_conf *conf = &local->hw.conf;
1567 if (local->ps_sdata) {
1568 ieee80211_enable_ps(local, local->ps_sdata);
1569 } else if (conf->flags & IEEE80211_CONF_PS) {
1570 conf->flags &= ~IEEE80211_CONF_PS;
1571 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1572 del_timer_sync(&local->dynamic_ps_timer);
1573 cancel_work_sync(&local->dynamic_ps_enable_work);
1577 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1579 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1580 struct sta_info *sta = NULL;
1581 bool authorized = false;
1583 if (!mgd->powersave)
1589 if (!mgd->associated)
1592 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1595 if (!mgd->have_beacon)
1599 sta = sta_info_get(sdata, mgd->bssid);
1601 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1607 /* need to hold RTNL or interface lock */
1608 void ieee80211_recalc_ps(struct ieee80211_local *local)
1610 struct ieee80211_sub_if_data *sdata, *found = NULL;
1614 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1615 local->ps_sdata = NULL;
1619 list_for_each_entry(sdata, &local->interfaces, list) {
1620 if (!ieee80211_sdata_running(sdata))
1622 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1623 /* If an AP vif is found, then disable PS
1624 * by setting the count to zero thereby setting
1630 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1636 if (count == 1 && ieee80211_powersave_allowed(found)) {
1637 u8 dtimper = found->u.mgd.dtim_period;
1639 timeout = local->dynamic_ps_forced_timeout;
1642 local->hw.conf.dynamic_ps_timeout = timeout;
1644 /* If the TIM IE is invalid, pretend the value is 1 */
1648 local->hw.conf.ps_dtim_period = dtimper;
1649 local->ps_sdata = found;
1651 local->ps_sdata = NULL;
1654 ieee80211_change_ps(local);
1657 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1659 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1661 if (sdata->vif.bss_conf.ps != ps_allowed) {
1662 sdata->vif.bss_conf.ps = ps_allowed;
1663 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1667 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1669 struct ieee80211_local *local =
1670 container_of(work, struct ieee80211_local,
1671 dynamic_ps_disable_work);
1673 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1674 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1675 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1678 ieee80211_wake_queues_by_reason(&local->hw,
1679 IEEE80211_MAX_QUEUE_MAP,
1680 IEEE80211_QUEUE_STOP_REASON_PS,
1684 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1686 struct ieee80211_local *local =
1687 container_of(work, struct ieee80211_local,
1688 dynamic_ps_enable_work);
1689 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1690 struct ieee80211_if_managed *ifmgd;
1691 unsigned long flags;
1694 /* can only happen when PS was just disabled anyway */
1698 ifmgd = &sdata->u.mgd;
1700 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1703 if (local->hw.conf.dynamic_ps_timeout > 0) {
1704 /* don't enter PS if TX frames are pending */
1705 if (drv_tx_frames_pending(local)) {
1706 mod_timer(&local->dynamic_ps_timer, jiffies +
1708 local->hw.conf.dynamic_ps_timeout));
1713 * transmission can be stopped by others which leads to
1714 * dynamic_ps_timer expiry. Postpone the ps timer if it
1715 * is not the actual idle state.
1717 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1718 for (q = 0; q < local->hw.queues; q++) {
1719 if (local->queue_stop_reasons[q]) {
1720 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1722 mod_timer(&local->dynamic_ps_timer, jiffies +
1724 local->hw.conf.dynamic_ps_timeout));
1728 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1731 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1732 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1733 if (drv_tx_frames_pending(local)) {
1734 mod_timer(&local->dynamic_ps_timer, jiffies +
1736 local->hw.conf.dynamic_ps_timeout));
1738 ieee80211_send_nullfunc(local, sdata, true);
1739 /* Flush to get the tx status of nullfunc frame */
1740 ieee80211_flush_queues(local, sdata, false);
1744 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1745 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1746 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1747 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1748 local->hw.conf.flags |= IEEE80211_CONF_PS;
1749 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1753 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1755 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1757 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1760 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1762 struct delayed_work *delayed_work = to_delayed_work(work);
1763 struct ieee80211_sub_if_data *sdata =
1764 container_of(delayed_work, struct ieee80211_sub_if_data,
1765 dfs_cac_timer_work);
1766 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1768 mutex_lock(&sdata->local->mtx);
1769 if (sdata->wdev.cac_started) {
1770 ieee80211_vif_release_channel(sdata);
1771 cfg80211_cac_event(sdata->dev, &chandef,
1772 NL80211_RADAR_CAC_FINISHED,
1775 mutex_unlock(&sdata->local->mtx);
1779 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1781 struct ieee80211_local *local = sdata->local;
1782 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1786 if (local->hw.queues < IEEE80211_NUM_ACS)
1789 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1790 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1792 unsigned long now = jiffies;
1794 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1795 tx_tspec->admitted_time &&
1796 time_after(now, tx_tspec->time_slice_start + HZ)) {
1797 tx_tspec->consumed_tx_time = 0;
1798 tx_tspec->time_slice_start = now;
1800 if (tx_tspec->downgraded)
1802 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1805 switch (tx_tspec->action) {
1806 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1807 /* take the original parameters */
1808 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1810 "failed to set TX queue parameters for queue %d\n",
1812 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1813 tx_tspec->downgraded = false;
1816 case TX_TSPEC_ACTION_DOWNGRADE:
1817 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1818 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1822 /* downgrade next lower non-ACM AC */
1823 for (non_acm_ac = ac + 1;
1824 non_acm_ac < IEEE80211_NUM_ACS;
1826 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1828 /* Usually the loop will result in using BK even if it
1829 * requires admission control, but such a configuration
1830 * makes no sense and we have to transmit somehow - the
1831 * AC selection does the same thing.
1832 * If we started out trying to downgrade from BK, then
1833 * the extra condition here might be needed.
1835 if (non_acm_ac >= IEEE80211_NUM_ACS)
1836 non_acm_ac = IEEE80211_AC_BK;
1837 if (drv_conf_tx(local, sdata, ac,
1838 &sdata->tx_conf[non_acm_ac]))
1840 "failed to set TX queue parameters for queue %d\n",
1842 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1844 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1845 tx_tspec->time_slice_start + HZ - now + 1);
1847 case TX_TSPEC_ACTION_NONE:
1856 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1858 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1859 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1862 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1864 struct ieee80211_sub_if_data *sdata;
1866 sdata = container_of(work, struct ieee80211_sub_if_data,
1867 u.mgd.tx_tspec_wk.work);
1868 ieee80211_sta_handle_tspec_ac_params(sdata);
1873 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1874 struct ieee80211_sub_if_data *sdata,
1875 const u8 *wmm_param, size_t wmm_param_len,
1876 const struct ieee80211_mu_edca_param_set *mu_edca)
1878 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1879 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1881 int count, mu_edca_count, ac;
1883 u8 uapsd_queues = 0;
1885 if (!local->ops->conf_tx)
1888 if (local->hw.queues < IEEE80211_NUM_ACS)
1894 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1897 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1898 uapsd_queues = ifmgd->uapsd_queues;
1900 count = wmm_param[6] & 0x0f;
1901 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1902 * if mu_edca was preset before and now it disappeared tell
1903 * the driver about it.
1905 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1906 if (count == ifmgd->wmm_last_param_set &&
1907 mu_edca_count == ifmgd->mu_edca_last_param_set)
1909 ifmgd->wmm_last_param_set = count;
1910 ifmgd->mu_edca_last_param_set = mu_edca_count;
1912 pos = wmm_param + 8;
1913 left = wmm_param_len - 8;
1915 memset(¶ms, 0, sizeof(params));
1918 for (; left >= 4; left -= 4, pos += 4) {
1919 int aci = (pos[0] >> 5) & 0x03;
1920 int acm = (pos[0] >> 4) & 0x01;
1925 ac = IEEE80211_AC_BK;
1927 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1928 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1930 params[ac].mu_edca = !!mu_edca;
1932 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1935 ac = IEEE80211_AC_VI;
1937 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1938 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1940 params[ac].mu_edca = !!mu_edca;
1942 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1945 ac = IEEE80211_AC_VO;
1947 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1948 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1950 params[ac].mu_edca = !!mu_edca;
1952 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
1956 ac = IEEE80211_AC_BE;
1958 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1959 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1961 params[ac].mu_edca = !!mu_edca;
1963 params[ac].mu_edca_param_rec = mu_edca->ac_be;
1967 params[ac].aifs = pos[0] & 0x0f;
1969 if (params[ac].aifs < 2) {
1971 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1972 params[ac].aifs, aci);
1973 params[ac].aifs = 2;
1975 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1976 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1977 params[ac].txop = get_unaligned_le16(pos + 2);
1978 params[ac].acm = acm;
1979 params[ac].uapsd = uapsd;
1981 if (params[ac].cw_min == 0 ||
1982 params[ac].cw_min > params[ac].cw_max) {
1984 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1985 params[ac].cw_min, params[ac].cw_max, aci);
1988 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac);
1991 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1993 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1995 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1996 params[ac].txop, params[ac].uapsd,
1997 ifmgd->tx_tspec[ac].downgraded);
1998 sdata->tx_conf[ac] = params[ac];
1999 if (!ifmgd->tx_tspec[ac].downgraded &&
2000 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
2002 "failed to set TX queue parameters for AC %d\n",
2006 /* enable WMM or activate new settings */
2007 sdata->vif.bss_conf.qos = true;
2011 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2013 lockdep_assert_held(&sdata->local->mtx);
2015 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2016 ieee80211_run_deferred_scan(sdata->local);
2019 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2021 mutex_lock(&sdata->local->mtx);
2022 __ieee80211_stop_poll(sdata);
2023 mutex_unlock(&sdata->local->mtx);
2026 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2027 u16 capab, bool erp_valid, u8 erp)
2029 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2030 struct ieee80211_supported_band *sband;
2032 bool use_protection;
2033 bool use_short_preamble;
2034 bool use_short_slot;
2036 sband = ieee80211_get_sband(sdata);
2041 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2042 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2044 use_protection = false;
2045 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2048 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2049 if (sband->band == NL80211_BAND_5GHZ)
2050 use_short_slot = true;
2052 if (use_protection != bss_conf->use_cts_prot) {
2053 bss_conf->use_cts_prot = use_protection;
2054 changed |= BSS_CHANGED_ERP_CTS_PROT;
2057 if (use_short_preamble != bss_conf->use_short_preamble) {
2058 bss_conf->use_short_preamble = use_short_preamble;
2059 changed |= BSS_CHANGED_ERP_PREAMBLE;
2062 if (use_short_slot != bss_conf->use_short_slot) {
2063 bss_conf->use_short_slot = use_short_slot;
2064 changed |= BSS_CHANGED_ERP_SLOT;
2070 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2071 struct cfg80211_bss *cbss,
2072 u32 bss_info_changed)
2074 struct ieee80211_bss *bss = (void *)cbss->priv;
2075 struct ieee80211_local *local = sdata->local;
2076 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2078 bss_info_changed |= BSS_CHANGED_ASSOC;
2079 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2080 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2082 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2083 beacon_loss_count * bss_conf->beacon_int));
2085 sdata->u.mgd.associated = cbss;
2086 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2088 ieee80211_check_rate_mask(sdata);
2090 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2092 if (sdata->vif.p2p ||
2093 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2094 const struct cfg80211_bss_ies *ies;
2097 ies = rcu_dereference(cbss->ies);
2101 ret = cfg80211_get_p2p_attr(
2102 ies->data, ies->len,
2103 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2104 (u8 *) &bss_conf->p2p_noa_attr,
2105 sizeof(bss_conf->p2p_noa_attr));
2107 sdata->u.mgd.p2p_noa_index =
2108 bss_conf->p2p_noa_attr.index;
2109 bss_info_changed |= BSS_CHANGED_P2P_PS;
2115 /* just to be sure */
2116 ieee80211_stop_poll(sdata);
2118 ieee80211_led_assoc(local, 1);
2120 if (sdata->u.mgd.have_beacon) {
2122 * If the AP is buggy we may get here with no DTIM period
2123 * known, so assume it's 1 which is the only safe assumption
2124 * in that case, although if the TIM IE is broken powersave
2125 * probably just won't work at all.
2127 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2128 bss_conf->beacon_rate = bss->beacon_rate;
2129 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2131 bss_conf->beacon_rate = NULL;
2132 bss_conf->dtim_period = 0;
2135 bss_conf->assoc = 1;
2137 /* Tell the driver to monitor connection quality (if supported) */
2138 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2139 bss_conf->cqm_rssi_thold)
2140 bss_info_changed |= BSS_CHANGED_CQM;
2142 /* Enable ARP filtering */
2143 if (bss_conf->arp_addr_cnt)
2144 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2146 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2148 mutex_lock(&local->iflist_mtx);
2149 ieee80211_recalc_ps(local);
2150 mutex_unlock(&local->iflist_mtx);
2152 ieee80211_recalc_smps(sdata);
2153 ieee80211_recalc_ps_vif(sdata);
2155 netif_carrier_on(sdata->dev);
2158 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2159 u16 stype, u16 reason, bool tx,
2162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2163 struct ieee80211_local *local = sdata->local;
2166 sdata_assert_lock(sdata);
2168 if (WARN_ON_ONCE(tx && !frame_buf))
2171 if (WARN_ON(!ifmgd->associated))
2174 ieee80211_stop_poll(sdata);
2176 ifmgd->associated = NULL;
2177 netif_carrier_off(sdata->dev);
2180 * if we want to get out of ps before disassoc (why?) we have
2181 * to do it before sending disassoc, as otherwise the null-packet
2184 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2185 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2186 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2188 local->ps_sdata = NULL;
2190 /* disable per-vif ps */
2191 ieee80211_recalc_ps_vif(sdata);
2193 /* make sure ongoing transmission finishes */
2197 * drop any frame before deauth/disassoc, this can be data or
2198 * management frame. Since we are disconnecting, we should not
2199 * insist sending these frames which can take time and delay
2200 * the disconnection and possible the roaming.
2203 ieee80211_flush_queues(local, sdata, true);
2205 /* deauthenticate/disassociate now */
2206 if (tx || frame_buf) {
2208 * In multi channel scenarios guarantee that the virtual
2209 * interface is granted immediate airtime to transmit the
2210 * deauthentication frame by calling mgd_prepare_tx, if the
2211 * driver requested so.
2213 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2214 !ifmgd->have_beacon)
2215 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2217 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2218 reason, tx, frame_buf);
2221 /* flush out frame - make sure the deauth was actually sent */
2223 ieee80211_flush_queues(local, sdata, false);
2225 /* clear bssid only after building the needed mgmt frames */
2226 eth_zero_addr(ifmgd->bssid);
2228 /* remove AP and TDLS peers */
2229 sta_info_flush(sdata);
2231 /* finally reset all BSS / config parameters */
2232 changed |= ieee80211_reset_erp_info(sdata);
2234 ieee80211_led_assoc(local, 0);
2235 changed |= BSS_CHANGED_ASSOC;
2236 sdata->vif.bss_conf.assoc = false;
2238 ifmgd->p2p_noa_index = -1;
2239 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2240 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2242 /* on the next assoc, re-program HT/VHT parameters */
2243 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2244 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2245 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2246 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2248 /* reset MU-MIMO ownership and group data */
2249 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2250 sizeof(sdata->vif.bss_conf.mu_group.membership));
2251 memset(sdata->vif.bss_conf.mu_group.position, 0,
2252 sizeof(sdata->vif.bss_conf.mu_group.position));
2253 changed |= BSS_CHANGED_MU_GROUPS;
2254 sdata->vif.mu_mimo_owner = false;
2256 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2258 del_timer_sync(&local->dynamic_ps_timer);
2259 cancel_work_sync(&local->dynamic_ps_enable_work);
2261 /* Disable ARP filtering */
2262 if (sdata->vif.bss_conf.arp_addr_cnt)
2263 changed |= BSS_CHANGED_ARP_FILTER;
2265 sdata->vif.bss_conf.qos = false;
2266 changed |= BSS_CHANGED_QOS;
2268 /* The BSSID (not really interesting) and HT changed */
2269 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2270 ieee80211_bss_info_change_notify(sdata, changed);
2272 /* disassociated - set to defaults now */
2273 ieee80211_set_wmm_default(sdata, false, false);
2275 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2276 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2277 del_timer_sync(&sdata->u.mgd.timer);
2278 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2280 sdata->vif.bss_conf.dtim_period = 0;
2281 sdata->vif.bss_conf.beacon_rate = NULL;
2283 ifmgd->have_beacon = false;
2286 mutex_lock(&local->mtx);
2287 ieee80211_vif_release_channel(sdata);
2289 sdata->vif.csa_active = false;
2290 ifmgd->csa_waiting_bcn = false;
2291 ifmgd->csa_ignored_same_chan = false;
2292 if (sdata->csa_block_tx) {
2293 ieee80211_wake_vif_queues(local, sdata,
2294 IEEE80211_QUEUE_STOP_REASON_CSA);
2295 sdata->csa_block_tx = false;
2297 mutex_unlock(&local->mtx);
2299 /* existing TX TSPEC sessions no longer exist */
2300 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2301 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2303 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2306 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2307 struct ieee80211_hdr *hdr)
2310 * We can postpone the mgd.timer whenever receiving unicast frames
2311 * from AP because we know that the connection is working both ways
2312 * at that time. But multicast frames (and hence also beacons) must
2313 * be ignored here, because we need to trigger the timer during
2314 * data idle periods for sending the periodic probe request to the
2315 * AP we're connected to.
2317 if (is_multicast_ether_addr(hdr->addr1))
2320 ieee80211_sta_reset_conn_monitor(sdata);
2323 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2326 struct ieee80211_local *local = sdata->local;
2328 mutex_lock(&local->mtx);
2329 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2332 __ieee80211_stop_poll(sdata);
2334 mutex_lock(&local->iflist_mtx);
2335 ieee80211_recalc_ps(local);
2336 mutex_unlock(&local->iflist_mtx);
2338 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2342 * We've received a probe response, but are not sure whether
2343 * we have or will be receiving any beacons or data, so let's
2344 * schedule the timers again, just in case.
2346 ieee80211_sta_reset_beacon_monitor(sdata);
2348 mod_timer(&ifmgd->conn_mon_timer,
2349 round_jiffies_up(jiffies +
2350 IEEE80211_CONNECTION_IDLE_TIME));
2352 mutex_unlock(&local->mtx);
2355 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2356 struct ieee80211_hdr *hdr,
2359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2360 u16 tid = ieee80211_get_tid(hdr);
2361 int ac = ieee80211_ac_from_tid(tid);
2362 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2363 unsigned long now = jiffies;
2365 if (likely(!tx_tspec->admitted_time))
2368 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2369 tx_tspec->consumed_tx_time = 0;
2370 tx_tspec->time_slice_start = now;
2372 if (tx_tspec->downgraded) {
2373 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2374 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2378 if (tx_tspec->downgraded)
2381 tx_tspec->consumed_tx_time += tx_time;
2383 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2384 tx_tspec->downgraded = true;
2385 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2386 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2390 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2391 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2393 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2395 if (!ieee80211_is_data(hdr->frame_control))
2398 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2399 sdata->u.mgd.probe_send_count > 0) {
2401 ieee80211_sta_reset_conn_monitor(sdata);
2403 sdata->u.mgd.nullfunc_failed = true;
2404 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2409 ieee80211_sta_reset_conn_monitor(sdata);
2412 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2413 const u8 *src, const u8 *dst,
2414 const u8 *ssid, size_t ssid_len,
2415 struct ieee80211_channel *channel)
2417 struct sk_buff *skb;
2419 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2420 ssid, ssid_len, NULL, 0,
2421 IEEE80211_PROBE_FLAG_DIRECTED);
2423 ieee80211_tx_skb(sdata, skb);
2426 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2430 u8 *dst = ifmgd->associated->bssid;
2431 u8 unicast_limit = max(1, max_probe_tries - 3);
2432 struct sta_info *sta;
2435 * Try sending broadcast probe requests for the last three
2436 * probe requests after the first ones failed since some
2437 * buggy APs only support broadcast probe requests.
2439 if (ifmgd->probe_send_count >= unicast_limit)
2443 * When the hardware reports an accurate Tx ACK status, it's
2444 * better to send a nullfunc frame instead of a probe request,
2445 * as it will kick us off the AP quickly if we aren't associated
2446 * anymore. The timeout will be reset if the frame is ACKed by
2449 ifmgd->probe_send_count++;
2452 mutex_lock(&sdata->local->sta_mtx);
2453 sta = sta_info_get(sdata, dst);
2455 ieee80211_check_fast_rx(sta);
2456 mutex_unlock(&sdata->local->sta_mtx);
2459 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2460 ifmgd->nullfunc_failed = false;
2461 ieee80211_send_nullfunc(sdata->local, sdata, false);
2466 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2467 if (WARN_ON_ONCE(ssid == NULL))
2472 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2474 ifmgd->associated->channel);
2478 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2479 run_again(sdata, ifmgd->probe_timeout);
2482 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2485 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2486 bool already = false;
2488 if (!ieee80211_sdata_running(sdata))
2493 if (!ifmgd->associated)
2496 mutex_lock(&sdata->local->mtx);
2498 if (sdata->local->tmp_channel || sdata->local->scanning) {
2499 mutex_unlock(&sdata->local->mtx);
2504 mlme_dbg_ratelimited(sdata,
2505 "detected beacon loss from AP (missed %d beacons) - probing\n",
2508 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2512 * The driver/our work has already reported this event or the
2513 * connection monitoring has kicked in and we have already sent
2514 * a probe request. Or maybe the AP died and the driver keeps
2515 * reporting until we disassociate...
2517 * In either case we have to ignore the current call to this
2518 * function (except for setting the correct probe reason bit)
2519 * because otherwise we would reset the timer every time and
2520 * never check whether we received a probe response!
2522 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2525 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2527 mutex_unlock(&sdata->local->mtx);
2532 mutex_lock(&sdata->local->iflist_mtx);
2533 ieee80211_recalc_ps(sdata->local);
2534 mutex_unlock(&sdata->local->iflist_mtx);
2536 ifmgd->probe_send_count = 0;
2537 ieee80211_mgd_probe_ap_send(sdata);
2539 sdata_unlock(sdata);
2542 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2543 struct ieee80211_vif *vif)
2545 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2547 struct cfg80211_bss *cbss;
2548 struct sk_buff *skb;
2552 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2555 sdata_assert_lock(sdata);
2557 if (ifmgd->associated)
2558 cbss = ifmgd->associated;
2559 else if (ifmgd->auth_data)
2560 cbss = ifmgd->auth_data->bss;
2561 else if (ifmgd->assoc_data)
2562 cbss = ifmgd->assoc_data->bss;
2567 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2568 if (WARN_ON_ONCE(ssid == NULL))
2573 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2574 (u32) -1, cbss->channel,
2576 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2581 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2583 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2584 const u8 *buf, size_t len, bool tx,
2587 struct ieee80211_event event = {
2589 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2590 .u.mlme.reason = reason,
2594 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2596 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2598 drv_event_callback(sdata->local, sdata, &event);
2601 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2603 struct ieee80211_local *local = sdata->local;
2604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2605 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2609 if (!ifmgd->associated) {
2610 sdata_unlock(sdata);
2614 tx = !sdata->csa_block_tx;
2616 /* AP is probably out of range (or not reachable for another reason) so
2617 * remove the bss struct for that AP.
2619 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2621 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2622 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2624 mutex_lock(&local->mtx);
2625 sdata->vif.csa_active = false;
2626 ifmgd->csa_waiting_bcn = false;
2627 if (sdata->csa_block_tx) {
2628 ieee80211_wake_vif_queues(local, sdata,
2629 IEEE80211_QUEUE_STOP_REASON_CSA);
2630 sdata->csa_block_tx = false;
2632 mutex_unlock(&local->mtx);
2634 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2635 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2637 sdata_unlock(sdata);
2640 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2642 struct ieee80211_sub_if_data *sdata =
2643 container_of(work, struct ieee80211_sub_if_data,
2644 u.mgd.beacon_connection_loss_work);
2645 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2647 if (ifmgd->associated)
2648 ifmgd->beacon_loss_count++;
2650 if (ifmgd->connection_loss) {
2651 sdata_info(sdata, "Connection to AP %pM lost\n",
2653 __ieee80211_disconnect(sdata);
2655 ieee80211_mgd_probe_ap(sdata, true);
2659 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2661 struct ieee80211_sub_if_data *sdata =
2662 container_of(work, struct ieee80211_sub_if_data,
2663 u.mgd.csa_connection_drop_work);
2665 __ieee80211_disconnect(sdata);
2668 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2670 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2671 struct ieee80211_hw *hw = &sdata->local->hw;
2673 trace_api_beacon_loss(sdata);
2675 sdata->u.mgd.connection_loss = false;
2676 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2678 EXPORT_SYMBOL(ieee80211_beacon_loss);
2680 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2682 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2683 struct ieee80211_hw *hw = &sdata->local->hw;
2685 trace_api_connection_loss(sdata);
2687 sdata->u.mgd.connection_loss = true;
2688 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2690 EXPORT_SYMBOL(ieee80211_connection_loss);
2693 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2696 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2698 sdata_assert_lock(sdata);
2702 * we are not authenticated yet, the only timer that could be
2703 * running is the timeout for the authentication response which
2704 * which is not relevant anymore.
2706 del_timer_sync(&sdata->u.mgd.timer);
2707 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2709 eth_zero_addr(sdata->u.mgd.bssid);
2710 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2711 sdata->u.mgd.flags = 0;
2712 mutex_lock(&sdata->local->mtx);
2713 ieee80211_vif_release_channel(sdata);
2714 mutex_unlock(&sdata->local->mtx);
2717 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2719 sdata->u.mgd.auth_data = NULL;
2722 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2723 bool assoc, bool abandon)
2725 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2727 sdata_assert_lock(sdata);
2731 * we are not associated yet, the only timer that could be
2732 * running is the timeout for the association response which
2733 * which is not relevant anymore.
2735 del_timer_sync(&sdata->u.mgd.timer);
2736 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2738 eth_zero_addr(sdata->u.mgd.bssid);
2739 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2740 sdata->u.mgd.flags = 0;
2741 sdata->vif.mu_mimo_owner = false;
2743 mutex_lock(&sdata->local->mtx);
2744 ieee80211_vif_release_channel(sdata);
2745 mutex_unlock(&sdata->local->mtx);
2748 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2752 sdata->u.mgd.assoc_data = NULL;
2755 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2756 struct ieee80211_mgmt *mgmt, size_t len)
2758 struct ieee80211_local *local = sdata->local;
2759 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2761 struct ieee802_11_elems elems;
2764 pos = mgmt->u.auth.variable;
2765 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2766 if (!elems.challenge)
2768 auth_data->expected_transaction = 4;
2769 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2770 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2771 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2772 IEEE80211_TX_INTFL_MLME_CONN_TX;
2773 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2774 elems.challenge - 2, elems.challenge_len + 2,
2775 auth_data->bss->bssid, auth_data->bss->bssid,
2776 auth_data->key, auth_data->key_len,
2777 auth_data->key_idx, tx_flags);
2780 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2784 struct sta_info *sta;
2787 sdata_info(sdata, "authenticated\n");
2788 ifmgd->auth_data->done = true;
2789 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2790 ifmgd->auth_data->timeout_started = true;
2791 run_again(sdata, ifmgd->auth_data->timeout);
2793 /* move station state to auth */
2794 mutex_lock(&sdata->local->sta_mtx);
2795 sta = sta_info_get(sdata, bssid);
2797 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2801 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2802 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2808 mutex_unlock(&sdata->local->sta_mtx);
2812 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2813 struct ieee80211_mgmt *mgmt, size_t len)
2815 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2817 u16 auth_alg, auth_transaction, status_code;
2818 struct ieee80211_event event = {
2820 .u.mlme.data = AUTH_EVENT,
2823 sdata_assert_lock(sdata);
2828 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2831 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2833 if (!ether_addr_equal(bssid, mgmt->bssid))
2836 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2837 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2838 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2840 if (auth_alg != ifmgd->auth_data->algorithm ||
2841 (auth_alg != WLAN_AUTH_SAE &&
2842 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2843 (auth_alg == WLAN_AUTH_SAE &&
2844 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2845 auth_transaction > 2))) {
2846 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2847 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2849 ifmgd->auth_data->expected_transaction);
2853 if (status_code != WLAN_STATUS_SUCCESS) {
2854 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2855 mgmt->sa, status_code);
2856 ieee80211_destroy_auth_data(sdata, false);
2857 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2858 event.u.mlme.status = MLME_DENIED;
2859 event.u.mlme.reason = status_code;
2860 drv_event_callback(sdata->local, sdata, &event);
2864 switch (ifmgd->auth_data->algorithm) {
2865 case WLAN_AUTH_OPEN:
2866 case WLAN_AUTH_LEAP:
2869 case WLAN_AUTH_FILS_SK:
2870 case WLAN_AUTH_FILS_SK_PFS:
2871 case WLAN_AUTH_FILS_PK:
2873 case WLAN_AUTH_SHARED_KEY:
2874 if (ifmgd->auth_data->expected_transaction != 4) {
2875 ieee80211_auth_challenge(sdata, mgmt, len);
2876 /* need another frame */
2881 WARN_ONCE(1, "invalid auth alg %d",
2882 ifmgd->auth_data->algorithm);
2886 event.u.mlme.status = MLME_SUCCESS;
2887 drv_event_callback(sdata->local, sdata, &event);
2888 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2889 (auth_transaction == 2 &&
2890 ifmgd->auth_data->expected_transaction == 2)) {
2891 if (!ieee80211_mark_sta_auth(sdata, bssid))
2893 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2894 auth_transaction == 2) {
2895 sdata_info(sdata, "SAE peer confirmed\n");
2896 ifmgd->auth_data->peer_confirmed = true;
2899 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2902 mutex_unlock(&sdata->local->sta_mtx);
2903 /* ignore frame -- wait for timeout */
2906 #define case_WLAN(type) \
2907 case WLAN_REASON_##type: return #type
2909 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2911 switch (reason_code) {
2912 case_WLAN(UNSPECIFIED);
2913 case_WLAN(PREV_AUTH_NOT_VALID);
2914 case_WLAN(DEAUTH_LEAVING);
2915 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2916 case_WLAN(DISASSOC_AP_BUSY);
2917 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2918 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2919 case_WLAN(DISASSOC_STA_HAS_LEFT);
2920 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2921 case_WLAN(DISASSOC_BAD_POWER);
2922 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2923 case_WLAN(INVALID_IE);
2924 case_WLAN(MIC_FAILURE);
2925 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2926 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2927 case_WLAN(IE_DIFFERENT);
2928 case_WLAN(INVALID_GROUP_CIPHER);
2929 case_WLAN(INVALID_PAIRWISE_CIPHER);
2930 case_WLAN(INVALID_AKMP);
2931 case_WLAN(UNSUPP_RSN_VERSION);
2932 case_WLAN(INVALID_RSN_IE_CAP);
2933 case_WLAN(IEEE8021X_FAILED);
2934 case_WLAN(CIPHER_SUITE_REJECTED);
2935 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2936 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2937 case_WLAN(DISASSOC_LOW_ACK);
2938 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2939 case_WLAN(QSTA_LEAVE_QBSS);
2940 case_WLAN(QSTA_NOT_USE);
2941 case_WLAN(QSTA_REQUIRE_SETUP);
2942 case_WLAN(QSTA_TIMEOUT);
2943 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2944 case_WLAN(MESH_PEER_CANCELED);
2945 case_WLAN(MESH_MAX_PEERS);
2946 case_WLAN(MESH_CONFIG);
2947 case_WLAN(MESH_CLOSE);
2948 case_WLAN(MESH_MAX_RETRIES);
2949 case_WLAN(MESH_CONFIRM_TIMEOUT);
2950 case_WLAN(MESH_INVALID_GTK);
2951 case_WLAN(MESH_INCONSISTENT_PARAM);
2952 case_WLAN(MESH_INVALID_SECURITY);
2953 case_WLAN(MESH_PATH_ERROR);
2954 case_WLAN(MESH_PATH_NOFORWARD);
2955 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2956 case_WLAN(MAC_EXISTS_IN_MBSS);
2957 case_WLAN(MESH_CHAN_REGULATORY);
2958 case_WLAN(MESH_CHAN);
2959 default: return "<unknown>";
2963 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2964 struct ieee80211_mgmt *mgmt, size_t len)
2966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2967 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2969 sdata_assert_lock(sdata);
2974 if (ifmgd->associated &&
2975 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2976 const u8 *bssid = ifmgd->associated->bssid;
2978 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2980 ieee80211_get_reason_code_string(reason_code));
2982 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2984 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2989 if (ifmgd->assoc_data &&
2990 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2991 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2994 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2996 ieee80211_get_reason_code_string(reason_code));
2998 ieee80211_destroy_assoc_data(sdata, false, true);
3000 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3006 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3007 struct ieee80211_mgmt *mgmt, size_t len)
3009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3012 sdata_assert_lock(sdata);
3017 if (!ifmgd->associated ||
3018 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3021 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3023 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3024 mgmt->sa, reason_code,
3025 ieee80211_get_reason_code_string(reason_code));
3027 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3029 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3032 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3033 u8 *supp_rates, unsigned int supp_rates_len,
3034 u32 *rates, u32 *basic_rates,
3035 bool *have_higher_than_11mbit,
3036 int *min_rate, int *min_rate_index,
3041 for (i = 0; i < supp_rates_len; i++) {
3042 int rate = supp_rates[i] & 0x7f;
3043 bool is_basic = !!(supp_rates[i] & 0x80);
3045 if ((rate * 5 * (1 << shift)) > 110)
3046 *have_higher_than_11mbit = true;
3049 * Skip HT and VHT BSS membership selectors since they're not
3052 * Note: Even though the membership selector and the basic
3053 * rate flag share the same bit, they are not exactly
3056 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3057 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3060 for (j = 0; j < sband->n_bitrates; j++) {
3061 struct ieee80211_rate *br;
3064 br = &sband->bitrates[j];
3066 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3067 if (brate == rate) {
3070 *basic_rates |= BIT(j);
3071 if ((rate * 5) < *min_rate) {
3072 *min_rate = rate * 5;
3073 *min_rate_index = j;
3081 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3082 const struct ieee802_11_elems *elems)
3084 if (elems->ext_capab_len < 10)
3087 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3090 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3091 IEEE80211_HE_MAC_CAP0_TWT_RES;
3094 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3095 struct cfg80211_bss *cbss,
3096 struct ieee80211_mgmt *mgmt, size_t len)
3098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3099 struct ieee80211_local *local = sdata->local;
3100 struct ieee80211_supported_band *sband;
3101 struct sta_info *sta;
3103 u16 capab_info, aid;
3104 struct ieee802_11_elems elems;
3105 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3106 const struct cfg80211_bss_ies *bss_ies = NULL;
3107 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3112 /* AssocResp and ReassocResp have identical structure */
3114 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3115 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3118 * The 5 MSB of the AID field are reserved
3119 * (802.11-2016 9.4.1.8 AID field)
3123 ifmgd->broken_ap = false;
3125 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3126 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3129 ifmgd->broken_ap = true;
3132 pos = mgmt->u.assoc_resp.variable;
3133 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3135 if (!elems.supp_rates) {
3136 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3141 ifmgd->tdls_chan_switch_prohibited =
3142 elems.ext_capab && elems.ext_capab_len >= 5 &&
3143 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3146 * Some APs are erroneously not including some information in their
3147 * (re)association response frames. Try to recover by using the data
3148 * from the beacon or probe response. This seems to afflict mobile
3149 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3150 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3152 if ((assoc_data->wmm && !elems.wmm_param) ||
3153 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3154 (!elems.ht_cap_elem || !elems.ht_operation)) ||
3155 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3156 (!elems.vht_cap_elem || !elems.vht_operation))) {
3157 const struct cfg80211_bss_ies *ies;
3158 struct ieee802_11_elems bss_elems;
3161 ies = rcu_dereference(cbss->ies);
3163 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3169 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3171 if (assoc_data->wmm &&
3172 !elems.wmm_param && bss_elems.wmm_param) {
3173 elems.wmm_param = bss_elems.wmm_param;
3175 "AP bug: WMM param missing from AssocResp\n");
3179 * Also check if we requested HT/VHT, otherwise the AP doesn't
3180 * have to include the IEs in the (re)association response.
3182 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3183 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3184 elems.ht_cap_elem = bss_elems.ht_cap_elem;
3186 "AP bug: HT capability missing from AssocResp\n");
3188 if (!elems.ht_operation && bss_elems.ht_operation &&
3189 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3190 elems.ht_operation = bss_elems.ht_operation;
3192 "AP bug: HT operation missing from AssocResp\n");
3194 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3195 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3196 elems.vht_cap_elem = bss_elems.vht_cap_elem;
3198 "AP bug: VHT capa missing from AssocResp\n");
3200 if (!elems.vht_operation && bss_elems.vht_operation &&
3201 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3202 elems.vht_operation = bss_elems.vht_operation;
3204 "AP bug: VHT operation missing from AssocResp\n");
3209 * We previously checked these in the beacon/probe response, so
3210 * they should be present here. This is just a safety net.
3212 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3213 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3215 "HT AP is missing WMM params or HT capability/operation\n");
3220 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3221 (!elems.vht_cap_elem || !elems.vht_operation)) {
3223 "VHT AP is missing VHT capability/operation\n");
3228 mutex_lock(&sdata->local->sta_mtx);
3230 * station info was already allocated and inserted before
3231 * the association and should be available to us
3233 sta = sta_info_get(sdata, cbss->bssid);
3234 if (WARN_ON(!sta)) {
3235 mutex_unlock(&sdata->local->sta_mtx);
3240 sband = ieee80211_get_sband(sdata);
3242 mutex_unlock(&sdata->local->sta_mtx);
3247 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3248 (!elems.he_cap || !elems.he_operation)) {
3249 mutex_unlock(&sdata->local->sta_mtx);
3251 "HE AP is missing HE capability/operation\n");
3256 /* Set up internal HT/VHT capabilities */
3257 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3258 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3259 elems.ht_cap_elem, sta);
3261 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3262 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3263 elems.vht_cap_elem, sta);
3265 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3267 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3272 bss_conf->he_support = sta->sta.he_cap.has_he;
3273 bss_conf->twt_requester =
3274 ieee80211_twt_req_supported(sta, &elems);
3276 bss_conf->he_support = false;
3277 bss_conf->twt_requester = false;
3280 if (bss_conf->he_support) {
3281 bss_conf->bss_color =
3282 le32_get_bits(elems.he_operation->he_oper_params,
3283 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3285 bss_conf->htc_trig_based_pkt_ext =
3286 le32_get_bits(elems.he_operation->he_oper_params,
3287 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3288 bss_conf->frame_time_rts_th =
3289 le32_get_bits(elems.he_operation->he_oper_params,
3290 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3292 bss_conf->multi_sta_back_32bit =
3293 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3294 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3296 bss_conf->ack_enabled =
3297 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3298 IEEE80211_HE_MAC_CAP2_ACK_EN;
3300 bss_conf->uora_exists = !!elems.uora_element;
3301 if (elems.uora_element)
3302 bss_conf->uora_ocw_range = elems.uora_element[0];
3304 /* TODO: OPEN: what happens if BSS color disable is set? */
3308 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3309 * in their association response, so ignore that data for our own
3310 * configuration. If it changed since the last beacon, we'll get the
3311 * next beacon and update then.
3315 * If an operating mode notification IE is present, override the
3316 * NSS calculation (that would be done in rate_control_rate_init())
3317 * and use the # of streams from that element.
3319 if (elems.opmode_notif &&
3320 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3323 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3324 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3326 sta->sta.rx_nss = nss;
3329 rate_control_rate_init(sta);
3331 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3332 set_sta_flag(sta, WLAN_STA_MFP);
3333 sta->sta.mfp = true;
3335 sta->sta.mfp = false;
3338 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3340 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3341 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3342 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3345 "failed to move station %pM to desired state\n",
3347 WARN_ON(__sta_info_destroy(sta));
3348 mutex_unlock(&sdata->local->sta_mtx);
3353 mutex_unlock(&sdata->local->sta_mtx);
3356 * Always handle WMM once after association regardless
3357 * of the first value the AP uses. Setting -1 here has
3358 * that effect because the AP values is an unsigned
3361 ifmgd->wmm_last_param_set = -1;
3362 ifmgd->mu_edca_last_param_set = -1;
3364 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3365 ieee80211_set_wmm_default(sdata, false, false);
3366 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3367 elems.wmm_param_len,
3368 elems.mu_edca_param_set)) {
3369 /* still enable QoS since we might have HT/VHT */
3370 ieee80211_set_wmm_default(sdata, false, true);
3371 /* set the disable-WMM flag in this case to disable
3372 * tracking WMM parameter changes in the beacon if
3373 * the parameters weren't actually valid. Doing so
3374 * avoids changing parameters very strangely when
3375 * the AP is going back and forth between valid and
3376 * invalid parameters.
3378 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3380 changed |= BSS_CHANGED_QOS;
3382 if (elems.max_idle_period_ie) {
3383 bss_conf->max_idle_period =
3384 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3385 bss_conf->protected_keep_alive =
3386 !!(elems.max_idle_period_ie->idle_options &
3387 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3388 changed |= BSS_CHANGED_KEEP_ALIVE;
3390 bss_conf->max_idle_period = 0;
3391 bss_conf->protected_keep_alive = false;
3394 /* set AID and assoc capability,
3395 * ieee80211_set_associated() will tell the driver */
3396 bss_conf->aid = aid;
3397 bss_conf->assoc_capability = capab_info;
3398 ieee80211_set_associated(sdata, cbss, changed);
3401 * If we're using 4-addr mode, let the AP know that we're
3402 * doing so, so that it can create the STA VLAN on its side
3404 if (ifmgd->use_4addr)
3405 ieee80211_send_4addr_nullfunc(local, sdata);
3408 * Start timer to probe the connection to the AP now.
3409 * Also start the timer that will detect beacon loss.
3411 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3412 ieee80211_sta_reset_beacon_monitor(sdata);
3420 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3421 struct ieee80211_mgmt *mgmt,
3424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3425 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3426 u16 capab_info, status_code, aid;
3427 struct ieee802_11_elems elems;
3428 int ac, uapsd_queues = -1;
3431 struct cfg80211_bss *bss;
3432 struct ieee80211_event event = {
3434 .u.mlme.data = ASSOC_EVENT,
3437 sdata_assert_lock(sdata);
3441 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3445 * AssocResp and ReassocResp have identical structure, so process both
3446 * of them in this function.
3452 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3453 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3454 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3455 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3458 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3459 reassoc ? "Rea" : "A", mgmt->sa,
3460 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3462 if (assoc_data->fils_kek_len &&
3463 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3466 pos = mgmt->u.assoc_resp.variable;
3467 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3469 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3470 elems.timeout_int &&
3471 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3473 tu = le32_to_cpu(elems.timeout_int->value);
3474 ms = tu * 1024 / 1000;
3476 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3478 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3479 assoc_data->timeout_started = true;
3480 if (ms > IEEE80211_ASSOC_TIMEOUT)
3481 run_again(sdata, assoc_data->timeout);
3485 bss = assoc_data->bss;
3487 if (status_code != WLAN_STATUS_SUCCESS) {
3488 sdata_info(sdata, "%pM denied association (code=%d)\n",
3489 mgmt->sa, status_code);
3490 ieee80211_destroy_assoc_data(sdata, false, false);
3491 event.u.mlme.status = MLME_DENIED;
3492 event.u.mlme.reason = status_code;
3493 drv_event_callback(sdata->local, sdata, &event);
3495 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3496 /* oops -- internal error -- send timeout for now */
3497 ieee80211_destroy_assoc_data(sdata, false, false);
3498 cfg80211_assoc_timeout(sdata->dev, bss);
3501 event.u.mlme.status = MLME_SUCCESS;
3502 drv_event_callback(sdata->local, sdata, &event);
3503 sdata_info(sdata, "associated\n");
3506 * destroy assoc_data afterwards, as otherwise an idle
3507 * recalc after assoc_data is NULL but before associated
3508 * is set can cause the interface to go idle
3510 ieee80211_destroy_assoc_data(sdata, true, false);
3512 /* get uapsd queues configuration */
3514 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3515 if (sdata->tx_conf[ac].uapsd)
3516 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3519 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3522 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3523 struct ieee80211_mgmt *mgmt, size_t len,
3524 struct ieee80211_rx_status *rx_status,
3525 struct ieee802_11_elems *elems)
3527 struct ieee80211_local *local = sdata->local;
3528 struct ieee80211_bss *bss;
3529 struct ieee80211_channel *channel;
3531 sdata_assert_lock(sdata);
3533 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3537 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3540 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3541 ieee80211_rx_bss_put(local, bss);
3546 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3547 struct sk_buff *skb)
3549 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3550 struct ieee80211_if_managed *ifmgd;
3551 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3552 size_t baselen, len = skb->len;
3553 struct ieee802_11_elems elems;
3555 ifmgd = &sdata->u.mgd;
3557 sdata_assert_lock(sdata);
3559 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3560 return; /* ignore ProbeResp to foreign address */
3562 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3566 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3569 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3571 if (ifmgd->associated &&
3572 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3573 ieee80211_reset_ap_probe(sdata);
3577 * This is the canonical list of information elements we care about,
3578 * the filter code also gives us all changes to the Microsoft OUI
3579 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3580 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3581 * changes to requested client power.
3583 * We implement beacon filtering in software since that means we can
3584 * avoid processing the frame here and in cfg80211, and userspace
3585 * will not be able to tell whether the hardware supports it or not.
3587 * XXX: This list needs to be dynamic -- userspace needs to be able to
3588 * add items it requires. It also needs to be able to tell us to
3589 * look out for other vendor IEs.
3591 static const u64 care_about_ies =
3592 (1ULL << WLAN_EID_COUNTRY) |
3593 (1ULL << WLAN_EID_ERP_INFO) |
3594 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3595 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3596 (1ULL << WLAN_EID_HT_CAPABILITY) |
3597 (1ULL << WLAN_EID_HT_OPERATION) |
3598 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3600 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3601 struct ieee80211_if_managed *ifmgd,
3602 struct ieee80211_bss_conf *bss_conf,
3603 struct ieee80211_local *local,
3604 struct ieee80211_rx_status *rx_status)
3606 /* Track average RSSI from the Beacon frames of the current AP */
3608 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3609 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3610 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3611 ifmgd->last_cqm_event_signal = 0;
3612 ifmgd->count_beacon_signal = 1;
3613 ifmgd->last_ave_beacon_signal = 0;
3615 ifmgd->count_beacon_signal++;
3618 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3620 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3621 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3622 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3623 int last_sig = ifmgd->last_ave_beacon_signal;
3624 struct ieee80211_event event = {
3629 * if signal crosses either of the boundaries, invoke callback
3630 * with appropriate parameters
3632 if (sig > ifmgd->rssi_max_thold &&
3633 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3634 ifmgd->last_ave_beacon_signal = sig;
3635 event.u.rssi.data = RSSI_EVENT_HIGH;
3636 drv_event_callback(local, sdata, &event);
3637 } else if (sig < ifmgd->rssi_min_thold &&
3638 (last_sig >= ifmgd->rssi_max_thold ||
3640 ifmgd->last_ave_beacon_signal = sig;
3641 event.u.rssi.data = RSSI_EVENT_LOW;
3642 drv_event_callback(local, sdata, &event);
3646 if (bss_conf->cqm_rssi_thold &&
3647 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3648 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3649 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3650 int last_event = ifmgd->last_cqm_event_signal;
3651 int thold = bss_conf->cqm_rssi_thold;
3652 int hyst = bss_conf->cqm_rssi_hyst;
3655 (last_event == 0 || sig < last_event - hyst)) {
3656 ifmgd->last_cqm_event_signal = sig;
3657 ieee80211_cqm_rssi_notify(
3659 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3661 } else if (sig > thold &&
3662 (last_event == 0 || sig > last_event + hyst)) {
3663 ifmgd->last_cqm_event_signal = sig;
3664 ieee80211_cqm_rssi_notify(
3666 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3671 if (bss_conf->cqm_rssi_low &&
3672 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3673 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3674 int last_event = ifmgd->last_cqm_event_signal;
3675 int low = bss_conf->cqm_rssi_low;
3676 int high = bss_conf->cqm_rssi_high;
3679 (last_event == 0 || last_event >= low)) {
3680 ifmgd->last_cqm_event_signal = sig;
3681 ieee80211_cqm_rssi_notify(
3683 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3685 } else if (sig > high &&
3686 (last_event == 0 || last_event <= high)) {
3687 ifmgd->last_cqm_event_signal = sig;
3688 ieee80211_cqm_rssi_notify(
3690 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3696 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3697 struct ieee80211_mgmt *mgmt, size_t len,
3698 struct ieee80211_rx_status *rx_status)
3700 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3701 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3703 struct ieee802_11_elems elems;
3704 struct ieee80211_local *local = sdata->local;
3705 struct ieee80211_chanctx_conf *chanctx_conf;
3706 struct ieee80211_channel *chan;
3707 struct sta_info *sta;
3713 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3715 sdata_assert_lock(sdata);
3717 /* Process beacon from the current BSS */
3718 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3723 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3724 if (!chanctx_conf) {
3729 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3733 chan = chanctx_conf->def.chan;
3736 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3737 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3738 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3739 len - baselen, false, &elems);
3741 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3742 if (elems.tim && !elems.parse_error) {
3743 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3744 ifmgd->dtim_period = tim_ie->dtim_period;
3746 ifmgd->have_beacon = true;
3747 ifmgd->assoc_data->need_beacon = false;
3748 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3749 sdata->vif.bss_conf.sync_tsf =
3750 le64_to_cpu(mgmt->u.beacon.timestamp);
3751 sdata->vif.bss_conf.sync_device_ts =
3752 rx_status->device_timestamp;
3754 sdata->vif.bss_conf.sync_dtim_count =
3755 elems.tim->dtim_count;
3757 sdata->vif.bss_conf.sync_dtim_count = 0;
3759 /* continue assoc process */
3760 ifmgd->assoc_data->timeout = jiffies;
3761 ifmgd->assoc_data->timeout_started = true;
3762 run_again(sdata, ifmgd->assoc_data->timeout);
3766 if (!ifmgd->associated ||
3767 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3769 bssid = ifmgd->associated->bssid;
3771 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3772 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3775 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3776 mlme_dbg_ratelimited(sdata,
3777 "cancelling AP probe due to a received beacon\n");
3778 ieee80211_reset_ap_probe(sdata);
3782 * Push the beacon loss detection into the future since
3783 * we are processing a beacon from the AP just now.
3785 ieee80211_sta_reset_beacon_monitor(sdata);
3787 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3788 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3789 len - baselen, false, &elems,
3790 care_about_ies, ncrc);
3792 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3793 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3794 if (local->hw.conf.dynamic_ps_timeout > 0) {
3795 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3796 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3797 ieee80211_hw_config(local,
3798 IEEE80211_CONF_CHANGE_PS);
3800 ieee80211_send_nullfunc(local, sdata, false);
3801 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3802 local->pspolling = true;
3805 * Here is assumed that the driver will be
3806 * able to send ps-poll frame and receive a
3807 * response even though power save mode is
3808 * enabled, but some drivers might require
3809 * to disable power save here. This needs
3810 * to be investigated.
3812 ieee80211_send_pspoll(local, sdata);
3816 if (sdata->vif.p2p ||
3817 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3818 struct ieee80211_p2p_noa_attr noa = {};
3821 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3823 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3824 (u8 *) &noa, sizeof(noa));
3826 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3827 /* valid noa_attr and index changed */
3828 sdata->u.mgd.p2p_noa_index = noa.index;
3829 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3830 changed |= BSS_CHANGED_P2P_PS;
3832 * make sure we update all information, the CRC
3833 * mechanism doesn't look at P2P attributes.
3835 ifmgd->beacon_crc_valid = false;
3837 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3838 /* noa_attr not found and we had valid noa_attr before */
3839 sdata->u.mgd.p2p_noa_index = -1;
3840 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3841 changed |= BSS_CHANGED_P2P_PS;
3842 ifmgd->beacon_crc_valid = false;
3846 if (ifmgd->csa_waiting_bcn)
3847 ieee80211_chswitch_post_beacon(sdata);
3850 * Update beacon timing and dtim count on every beacon appearance. This
3851 * will allow the driver to use the most updated values. Do it before
3852 * comparing this one with last received beacon.
3853 * IMPORTANT: These parameters would possibly be out of sync by the time
3854 * the driver will use them. The synchronized view is currently
3855 * guaranteed only in certain callbacks.
3857 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3858 sdata->vif.bss_conf.sync_tsf =
3859 le64_to_cpu(mgmt->u.beacon.timestamp);
3860 sdata->vif.bss_conf.sync_device_ts =
3861 rx_status->device_timestamp;
3863 sdata->vif.bss_conf.sync_dtim_count =
3864 elems.tim->dtim_count;
3866 sdata->vif.bss_conf.sync_dtim_count = 0;
3869 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3871 ifmgd->beacon_crc = ncrc;
3872 ifmgd->beacon_crc_valid = true;
3874 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3876 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3877 rx_status->device_timestamp,
3880 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3881 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3882 elems.wmm_param_len,
3883 elems.mu_edca_param_set))
3884 changed |= BSS_CHANGED_QOS;
3887 * If we haven't had a beacon before, tell the driver about the
3888 * DTIM period (and beacon timing if desired) now.
3890 if (!ifmgd->have_beacon) {
3891 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3893 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3895 bss_conf->dtim_period = 1;
3897 changed |= BSS_CHANGED_BEACON_INFO;
3898 ifmgd->have_beacon = true;
3900 mutex_lock(&local->iflist_mtx);
3901 ieee80211_recalc_ps(local);
3902 mutex_unlock(&local->iflist_mtx);
3904 ieee80211_recalc_ps_vif(sdata);
3907 if (elems.erp_info) {
3909 erp_value = elems.erp_info[0];
3913 changed |= ieee80211_handle_bss_capability(sdata,
3914 le16_to_cpu(mgmt->u.beacon.capab_info),
3915 erp_valid, erp_value);
3917 mutex_lock(&local->sta_mtx);
3918 sta = sta_info_get(sdata, bssid);
3920 if (ieee80211_config_bw(sdata, sta,
3921 elems.ht_cap_elem, elems.ht_operation,
3922 elems.vht_operation, elems.he_operation,
3924 mutex_unlock(&local->sta_mtx);
3926 "failed to follow AP %pM bandwidth change, disconnect\n",
3928 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3929 WLAN_REASON_DEAUTH_LEAVING,
3931 ieee80211_report_disconnect(sdata, deauth_buf,
3932 sizeof(deauth_buf), true,
3933 WLAN_REASON_DEAUTH_LEAVING);
3937 if (sta && elems.opmode_notif)
3938 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3940 mutex_unlock(&local->sta_mtx);
3942 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3944 elems.country_elem_len,
3945 elems.pwr_constr_elem,
3946 elems.cisco_dtpc_elem);
3948 ieee80211_bss_info_change_notify(sdata, changed);
3951 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3952 struct sk_buff *skb)
3954 struct ieee80211_rx_status *rx_status;
3955 struct ieee80211_mgmt *mgmt;
3957 struct ieee802_11_elems elems;
3960 rx_status = (struct ieee80211_rx_status *) skb->cb;
3961 mgmt = (struct ieee80211_mgmt *) skb->data;
3962 fc = le16_to_cpu(mgmt->frame_control);
3966 switch (fc & IEEE80211_FCTL_STYPE) {
3967 case IEEE80211_STYPE_BEACON:
3968 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3970 case IEEE80211_STYPE_PROBE_RESP:
3971 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3973 case IEEE80211_STYPE_AUTH:
3974 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3976 case IEEE80211_STYPE_DEAUTH:
3977 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3979 case IEEE80211_STYPE_DISASSOC:
3980 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3982 case IEEE80211_STYPE_ASSOC_RESP:
3983 case IEEE80211_STYPE_REASSOC_RESP:
3984 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3986 case IEEE80211_STYPE_ACTION:
3987 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3988 ies_len = skb->len -
3989 offsetof(struct ieee80211_mgmt,
3990 u.action.u.chan_switch.variable);
3995 ieee802_11_parse_elems(
3996 mgmt->u.action.u.chan_switch.variable,
3997 ies_len, true, &elems);
3999 if (elems.parse_error)
4002 ieee80211_sta_process_chanswitch(sdata,
4004 rx_status->device_timestamp,
4006 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4007 ies_len = skb->len -
4008 offsetof(struct ieee80211_mgmt,
4009 u.action.u.ext_chan_switch.variable);
4014 ieee802_11_parse_elems(
4015 mgmt->u.action.u.ext_chan_switch.variable,
4016 ies_len, true, &elems);
4018 if (elems.parse_error)
4021 /* for the handling code pretend this was also an IE */
4022 elems.ext_chansw_ie =
4023 &mgmt->u.action.u.ext_chan_switch.data;
4025 ieee80211_sta_process_chanswitch(sdata,
4027 rx_status->device_timestamp,
4032 sdata_unlock(sdata);
4035 static void ieee80211_sta_timer(struct timer_list *t)
4037 struct ieee80211_sub_if_data *sdata =
4038 from_timer(sdata, t, u.mgd.timer);
4040 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4043 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4044 u8 *bssid, u8 reason, bool tx)
4046 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4048 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4051 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4055 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4057 struct ieee80211_local *local = sdata->local;
4058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4059 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4063 u16 prepare_tx_duration = 0;
4065 sdata_assert_lock(sdata);
4067 if (WARN_ON_ONCE(!auth_data))
4072 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4073 sdata_info(sdata, "authentication with %pM timed out\n",
4074 auth_data->bss->bssid);
4077 * Most likely AP is not in the range so remove the
4078 * bss struct for that AP.
4080 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4085 if (auth_data->algorithm == WLAN_AUTH_SAE)
4086 prepare_tx_duration =
4087 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4089 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4091 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4092 auth_data->bss->bssid, auth_data->tries,
4093 IEEE80211_AUTH_MAX_TRIES);
4095 auth_data->expected_transaction = 2;
4097 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4098 trans = auth_data->sae_trans;
4099 status = auth_data->sae_status;
4100 auth_data->expected_transaction = trans;
4103 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4104 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4105 IEEE80211_TX_INTFL_MLME_CONN_TX;
4107 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4108 auth_data->data, auth_data->data_len,
4109 auth_data->bss->bssid,
4110 auth_data->bss->bssid, NULL, 0, 0,
4113 if (tx_flags == 0) {
4114 if (auth_data->algorithm == WLAN_AUTH_SAE)
4115 auth_data->timeout = jiffies +
4116 IEEE80211_AUTH_TIMEOUT_SAE;
4118 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4120 auth_data->timeout =
4121 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4124 auth_data->timeout_started = true;
4125 run_again(sdata, auth_data->timeout);
4130 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4132 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4133 struct ieee80211_local *local = sdata->local;
4135 sdata_assert_lock(sdata);
4137 assoc_data->tries++;
4138 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4139 sdata_info(sdata, "association with %pM timed out\n",
4140 assoc_data->bss->bssid);
4143 * Most likely AP is not in the range so remove the
4144 * bss struct for that AP.
4146 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4151 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4152 assoc_data->bss->bssid, assoc_data->tries,
4153 IEEE80211_ASSOC_MAX_TRIES);
4154 ieee80211_send_assoc(sdata);
4156 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4157 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4158 assoc_data->timeout_started = true;
4159 run_again(sdata, assoc_data->timeout);
4161 assoc_data->timeout =
4162 round_jiffies_up(jiffies +
4163 IEEE80211_ASSOC_TIMEOUT_LONG);
4164 assoc_data->timeout_started = true;
4165 run_again(sdata, assoc_data->timeout);
4171 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4172 __le16 fc, bool acked)
4174 struct ieee80211_local *local = sdata->local;
4176 sdata->u.mgd.status_fc = fc;
4177 sdata->u.mgd.status_acked = acked;
4178 sdata->u.mgd.status_received = true;
4180 ieee80211_queue_work(&local->hw, &sdata->work);
4183 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4185 struct ieee80211_local *local = sdata->local;
4186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4190 if (ifmgd->status_received) {
4191 __le16 fc = ifmgd->status_fc;
4192 bool status_acked = ifmgd->status_acked;
4194 ifmgd->status_received = false;
4195 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4197 if (ifmgd->auth_data->algorithm ==
4199 ifmgd->auth_data->timeout =
4201 IEEE80211_AUTH_TIMEOUT_SAE;
4203 ifmgd->auth_data->timeout =
4205 IEEE80211_AUTH_TIMEOUT_SHORT;
4206 run_again(sdata, ifmgd->auth_data->timeout);
4208 ifmgd->auth_data->timeout = jiffies - 1;
4210 ifmgd->auth_data->timeout_started = true;
4211 } else if (ifmgd->assoc_data &&
4212 (ieee80211_is_assoc_req(fc) ||
4213 ieee80211_is_reassoc_req(fc))) {
4215 ifmgd->assoc_data->timeout =
4216 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4217 run_again(sdata, ifmgd->assoc_data->timeout);
4219 ifmgd->assoc_data->timeout = jiffies - 1;
4221 ifmgd->assoc_data->timeout_started = true;
4225 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4226 time_after(jiffies, ifmgd->auth_data->timeout)) {
4227 if (ifmgd->auth_data->done) {
4229 * ok ... we waited for assoc but userspace didn't,
4230 * so let's just kill the auth data
4232 ieee80211_destroy_auth_data(sdata, false);
4233 } else if (ieee80211_auth(sdata)) {
4235 struct ieee80211_event event = {
4237 .u.mlme.data = AUTH_EVENT,
4238 .u.mlme.status = MLME_TIMEOUT,
4241 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4243 ieee80211_destroy_auth_data(sdata, false);
4245 cfg80211_auth_timeout(sdata->dev, bssid);
4246 drv_event_callback(sdata->local, sdata, &event);
4248 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4249 run_again(sdata, ifmgd->auth_data->timeout);
4251 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4252 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4253 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4254 ieee80211_do_assoc(sdata)) {
4255 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4256 struct ieee80211_event event = {
4258 .u.mlme.data = ASSOC_EVENT,
4259 .u.mlme.status = MLME_TIMEOUT,
4262 ieee80211_destroy_assoc_data(sdata, false, false);
4263 cfg80211_assoc_timeout(sdata->dev, bss);
4264 drv_event_callback(sdata->local, sdata, &event);
4266 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4267 run_again(sdata, ifmgd->assoc_data->timeout);
4269 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4270 ifmgd->associated) {
4274 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4276 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4277 max_tries = max_nullfunc_tries;
4279 max_tries = max_probe_tries;
4281 /* ACK received for nullfunc probing frame */
4282 if (!ifmgd->probe_send_count)
4283 ieee80211_reset_ap_probe(sdata);
4284 else if (ifmgd->nullfunc_failed) {
4285 if (ifmgd->probe_send_count < max_tries) {
4287 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4288 bssid, ifmgd->probe_send_count,
4290 ieee80211_mgd_probe_ap_send(sdata);
4293 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4295 ieee80211_sta_connection_lost(sdata, bssid,
4296 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4299 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4300 run_again(sdata, ifmgd->probe_timeout);
4301 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4303 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4304 bssid, probe_wait_ms);
4305 ieee80211_sta_connection_lost(sdata, bssid,
4306 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4307 } else if (ifmgd->probe_send_count < max_tries) {
4309 "No probe response from AP %pM after %dms, try %d/%i\n",
4310 bssid, probe_wait_ms,
4311 ifmgd->probe_send_count, max_tries);
4312 ieee80211_mgd_probe_ap_send(sdata);
4315 * We actually lost the connection ... or did we?
4319 "No probe response from AP %pM after %dms, disconnecting.\n",
4320 bssid, probe_wait_ms);
4322 ieee80211_sta_connection_lost(sdata, bssid,
4323 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4327 sdata_unlock(sdata);
4330 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4332 struct ieee80211_sub_if_data *sdata =
4333 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4334 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4336 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4339 sdata->u.mgd.connection_loss = false;
4340 ieee80211_queue_work(&sdata->local->hw,
4341 &sdata->u.mgd.beacon_connection_loss_work);
4344 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4346 struct ieee80211_sub_if_data *sdata =
4347 from_timer(sdata, t, u.mgd.conn_mon_timer);
4348 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4349 struct ieee80211_local *local = sdata->local;
4351 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4354 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4357 static void ieee80211_sta_monitor_work(struct work_struct *work)
4359 struct ieee80211_sub_if_data *sdata =
4360 container_of(work, struct ieee80211_sub_if_data,
4361 u.mgd.monitor_work);
4363 ieee80211_mgd_probe_ap(sdata, false);
4366 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4368 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4369 __ieee80211_stop_poll(sdata);
4371 /* let's probe the connection once */
4372 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4373 ieee80211_queue_work(&sdata->local->hw,
4374 &sdata->u.mgd.monitor_work);
4379 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4381 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4382 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4386 if (ifmgd->auth_data || ifmgd->assoc_data) {
4387 const u8 *bssid = ifmgd->auth_data ?
4388 ifmgd->auth_data->bss->bssid :
4389 ifmgd->assoc_data->bss->bssid;
4392 * If we are trying to authenticate / associate while suspending,
4393 * cfg80211 won't know and won't actually abort those attempts,
4394 * thus we need to do that ourselves.
4396 ieee80211_send_deauth_disassoc(sdata, bssid,
4397 IEEE80211_STYPE_DEAUTH,
4398 WLAN_REASON_DEAUTH_LEAVING,
4400 if (ifmgd->assoc_data)
4401 ieee80211_destroy_assoc_data(sdata, false, true);
4402 if (ifmgd->auth_data)
4403 ieee80211_destroy_auth_data(sdata, false);
4404 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4405 IEEE80211_DEAUTH_FRAME_LEN);
4408 /* This is a bit of a hack - we should find a better and more generic
4409 * solution to this. Normally when suspending, cfg80211 will in fact
4410 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4411 * auth (not so important) or assoc (this is the problem) process.
4413 * As a consequence, it can happen that we are in the process of both
4414 * associating and suspending, and receive an association response
4415 * after cfg80211 has checked if it needs to disconnect, but before
4416 * we actually set the flag to drop incoming frames. This will then
4417 * cause the workqueue flush to process the association response in
4418 * the suspend, resulting in a successful association just before it
4419 * tries to remove the interface from the driver, which now though
4420 * has a channel context assigned ... this results in issues.
4422 * To work around this (for now) simply deauth here again if we're
4425 if (ifmgd->associated && !sdata->local->wowlan) {
4427 struct cfg80211_deauth_request req = {
4428 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4432 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4433 ieee80211_mgd_deauth(sdata, &req);
4436 sdata_unlock(sdata);
4439 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4441 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4444 if (!ifmgd->associated) {
4445 sdata_unlock(sdata);
4449 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4450 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4451 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4452 ieee80211_sta_connection_lost(sdata,
4453 ifmgd->associated->bssid,
4454 WLAN_REASON_UNSPECIFIED,
4456 sdata_unlock(sdata);
4459 sdata_unlock(sdata);
4463 /* interface setup */
4464 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4466 struct ieee80211_if_managed *ifmgd;
4468 ifmgd = &sdata->u.mgd;
4469 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4470 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4471 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4472 ieee80211_beacon_connection_loss_work);
4473 INIT_WORK(&ifmgd->csa_connection_drop_work,
4474 ieee80211_csa_connection_drop_work);
4475 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4476 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4477 ieee80211_tdls_peer_del_work);
4478 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4479 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4480 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4481 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4482 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4483 ieee80211_sta_handle_tspec_ac_params_wk);
4486 ifmgd->powersave = sdata->wdev.ps;
4487 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4488 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4489 ifmgd->p2p_noa_index = -1;
4491 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4492 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4494 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4496 /* Setup TDLS data */
4497 spin_lock_init(&ifmgd->teardown_lock);
4498 ifmgd->teardown_skb = NULL;
4499 ifmgd->orig_teardown_skb = NULL;
4502 /* scan finished notification */
4503 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4505 struct ieee80211_sub_if_data *sdata;
4507 /* Restart STA timers */
4509 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4510 if (ieee80211_sdata_running(sdata))
4511 ieee80211_restart_sta_timer(sdata);
4516 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4517 struct cfg80211_bss *cbss)
4519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4520 const u8 *ht_cap_ie, *vht_cap_ie;
4521 const struct ieee80211_ht_cap *ht_cap;
4522 const struct ieee80211_vht_cap *vht_cap;
4525 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4528 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4529 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4530 ht_cap = (void *)(ht_cap_ie + 2);
4531 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4533 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4534 * "Tx Unequal Modulation Supported" fields.
4538 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4541 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4542 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4546 vht_cap = (void *)(vht_cap_ie + 2);
4547 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4548 for (nss = 8; nss > 0; nss--) {
4549 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4550 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4553 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4554 chains = max(chains, nss);
4561 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4562 const struct ieee80211_he_operation *he_op)
4564 const struct ieee80211_sta_he_cap *sta_he_cap =
4565 ieee80211_get_he_sta_cap(sband);
4569 if (!sta_he_cap || !he_op)
4572 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4574 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4575 for (i = 0; i < 3; i++) {
4576 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4577 &sta_he_cap->he_mcs_nss_supp;
4578 u16 sta_mcs_map_rx =
4579 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4580 u16 sta_mcs_map_tx =
4581 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4583 bool verified = true;
4586 * For each band there is a maximum of 8 spatial streams
4587 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4588 * of 2 bits per NSS (1-8), with the values defined in enum
4589 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4590 * capabilities aren't less than the AP's minimum requirements
4591 * for this HE BSS per SS.
4592 * It is enough to find one such band that meets the reqs.
4594 for (nss = 8; nss > 0; nss--) {
4595 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4596 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4597 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4599 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4603 * Make sure the HE AP doesn't require MCSs that aren't
4604 * supported by the client
4606 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4607 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4608 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4618 /* If here, STA doesn't meet AP's HE min requirements */
4622 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4623 struct cfg80211_bss *cbss)
4625 struct ieee80211_local *local = sdata->local;
4626 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4627 const struct ieee80211_ht_cap *ht_cap = NULL;
4628 const struct ieee80211_ht_operation *ht_oper = NULL;
4629 const struct ieee80211_vht_operation *vht_oper = NULL;
4630 const struct ieee80211_he_operation *he_oper = NULL;
4631 struct ieee80211_supported_band *sband;
4632 struct cfg80211_chan_def chandef;
4637 sband = local->hw.wiphy->bands[cbss->channel->band];
4639 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4640 IEEE80211_STA_DISABLE_80P80MHZ |
4641 IEEE80211_STA_DISABLE_160MHZ);
4645 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4646 sband->ht_cap.ht_supported) {
4647 const u8 *ht_oper_ie, *ht_cap_ie;
4649 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4650 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4651 ht_oper = (void *)(ht_oper_ie + 2);
4653 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4654 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4655 ht_cap = (void *)(ht_cap_ie + 2);
4658 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4663 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4664 sband->vht_cap.vht_supported) {
4665 const u8 *vht_oper_ie, *vht_cap;
4667 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4668 WLAN_EID_VHT_OPERATION);
4669 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4670 vht_oper = (void *)(vht_oper_ie + 2);
4671 if (vht_oper && !ht_oper) {
4674 "AP advertised VHT without HT, disabling both\n");
4675 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4676 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4679 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4680 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4681 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4686 if (!ieee80211_get_he_sta_cap(sband))
4687 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4689 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4690 const struct cfg80211_bss_ies *ies;
4691 const u8 *he_oper_ie;
4693 ies = rcu_dereference(cbss->ies);
4694 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4695 ies->data, ies->len);
4697 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4698 he_oper = (void *)(he_oper_ie + 3);
4702 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4703 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4706 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4708 for (i = 0; i < sband->n_channels; i++) {
4709 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4710 IEEE80211_CHAN_NO_80MHZ))
4718 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4720 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4722 ht_oper, vht_oper, he_oper,
4725 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4730 /* will change later if needed */
4731 sdata->smps_mode = IEEE80211_SMPS_OFF;
4733 mutex_lock(&local->mtx);
4735 * If this fails (possibly due to channel context sharing
4736 * on incompatible channels, e.g. 80+80 and 160 sharing the
4737 * same control channel) try to use a smaller bandwidth.
4739 ret = ieee80211_vif_use_channel(sdata, &chandef,
4740 IEEE80211_CHANCTX_SHARED);
4742 /* don't downgrade for 5 and 10 MHz channels, though. */
4743 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4744 chandef.width == NL80211_CHAN_WIDTH_10)
4747 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4748 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4749 ret = ieee80211_vif_use_channel(sdata, &chandef,
4750 IEEE80211_CHANCTX_SHARED);
4753 mutex_unlock(&local->mtx);
4757 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4758 struct cfg80211_bss *cbss, bool assoc,
4761 struct ieee80211_local *local = sdata->local;
4762 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4763 struct ieee80211_bss *bss = (void *)cbss->priv;
4764 struct sta_info *new_sta = NULL;
4765 struct ieee80211_supported_band *sband;
4766 bool have_sta = false;
4769 sband = local->hw.wiphy->bands[cbss->channel->band];
4771 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4774 /* If a reconfig is happening, bail out */
4775 if (local->in_reconfig)
4780 have_sta = sta_info_get(sdata, cbss->bssid);
4785 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4791 * Set up the information for the new channel before setting the
4792 * new channel. We can't - completely race-free - change the basic
4793 * rates bitmap and the channel (sband) that it refers to, but if
4794 * we set it up before we at least avoid calling into the driver's
4795 * bss_info_changed() method with invalid information (since we do
4796 * call that from changing the channel - only for IDLE and perhaps
4797 * some others, but ...).
4799 * So to avoid that, just set up all the new information before the
4800 * channel, but tell the driver to apply it only afterwards, since
4801 * it might need the new channel for that.
4804 u32 rates = 0, basic_rates = 0;
4805 bool have_higher_than_11mbit;
4806 int min_rate = INT_MAX, min_rate_index = -1;
4807 const struct cfg80211_bss_ies *ies;
4808 int shift = ieee80211_vif_get_shift(&sdata->vif);
4810 ieee80211_get_rates(sband, bss->supp_rates,
4811 bss->supp_rates_len,
4812 &rates, &basic_rates,
4813 &have_higher_than_11mbit,
4814 &min_rate, &min_rate_index,
4818 * This used to be a workaround for basic rates missing
4819 * in the association response frame. Now that we no
4820 * longer use the basic rates from there, it probably
4821 * doesn't happen any more, but keep the workaround so
4822 * in case some *other* APs are buggy in different ways
4823 * we can connect -- with a warning.
4825 if (!basic_rates && min_rate_index >= 0) {
4827 "No basic rates, using min rate instead\n");
4828 basic_rates = BIT(min_rate_index);
4831 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4832 sdata->vif.bss_conf.basic_rates = basic_rates;
4834 /* cf. IEEE 802.11 9.2.12 */
4835 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4836 have_higher_than_11mbit)
4837 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4839 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4841 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4843 /* set timing information */
4844 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4846 ies = rcu_dereference(cbss->beacon_ies);
4850 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4851 sdata->vif.bss_conf.sync_device_ts =
4852 bss->device_ts_beacon;
4853 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4854 ies->data, ies->len);
4855 if (tim_ie && tim_ie[1] >= 2)
4856 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4858 sdata->vif.bss_conf.sync_dtim_count = 0;
4859 } else if (!ieee80211_hw_check(&sdata->local->hw,
4860 TIMING_BEACON_ONLY)) {
4861 ies = rcu_dereference(cbss->proberesp_ies);
4862 /* must be non-NULL since beacon IEs were NULL */
4863 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4864 sdata->vif.bss_conf.sync_device_ts =
4865 bss->device_ts_presp;
4866 sdata->vif.bss_conf.sync_dtim_count = 0;
4868 sdata->vif.bss_conf.sync_tsf = 0;
4869 sdata->vif.bss_conf.sync_device_ts = 0;
4870 sdata->vif.bss_conf.sync_dtim_count = 0;
4875 if (new_sta || override) {
4876 err = ieee80211_prep_channel(sdata, cbss);
4879 sta_info_free(local, new_sta);
4886 * tell driver about BSSID, basic rates and timing
4887 * this was set up above, before setting the channel
4889 ieee80211_bss_info_change_notify(sdata,
4890 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4891 BSS_CHANGED_BEACON_INT);
4894 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4896 err = sta_info_insert(new_sta);
4900 "failed to insert STA entry for the AP (error %d)\n",
4905 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4907 /* Cancel scan to ensure that nothing interferes with connection */
4908 if (local->scanning)
4909 ieee80211_scan_cancel(local);
4915 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4916 struct cfg80211_auth_request *req)
4918 struct ieee80211_local *local = sdata->local;
4919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4920 struct ieee80211_mgd_auth_data *auth_data;
4925 /* prepare auth data structure */
4927 switch (req->auth_type) {
4928 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4929 auth_alg = WLAN_AUTH_OPEN;
4931 case NL80211_AUTHTYPE_SHARED_KEY:
4932 if (IS_ERR(local->wep_tx_tfm))
4934 auth_alg = WLAN_AUTH_SHARED_KEY;
4936 case NL80211_AUTHTYPE_FT:
4937 auth_alg = WLAN_AUTH_FT;
4939 case NL80211_AUTHTYPE_NETWORK_EAP:
4940 auth_alg = WLAN_AUTH_LEAP;
4942 case NL80211_AUTHTYPE_SAE:
4943 auth_alg = WLAN_AUTH_SAE;
4945 case NL80211_AUTHTYPE_FILS_SK:
4946 auth_alg = WLAN_AUTH_FILS_SK;
4948 case NL80211_AUTHTYPE_FILS_SK_PFS:
4949 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4951 case NL80211_AUTHTYPE_FILS_PK:
4952 auth_alg = WLAN_AUTH_FILS_PK;
4958 if (ifmgd->assoc_data)
4961 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4962 req->ie_len, GFP_KERNEL);
4966 auth_data->bss = req->bss;
4968 if (req->auth_data_len >= 4) {
4969 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4970 __le16 *pos = (__le16 *) req->auth_data;
4972 auth_data->sae_trans = le16_to_cpu(pos[0]);
4973 auth_data->sae_status = le16_to_cpu(pos[1]);
4975 memcpy(auth_data->data, req->auth_data + 4,
4976 req->auth_data_len - 4);
4977 auth_data->data_len += req->auth_data_len - 4;
4980 /* Check if continuing authentication or trying to authenticate with the
4981 * same BSS that we were in the process of authenticating with and avoid
4982 * removal and re-addition of the STA entry in
4983 * ieee80211_prep_connection().
4985 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
4987 if (req->ie && req->ie_len) {
4988 memcpy(&auth_data->data[auth_data->data_len],
4989 req->ie, req->ie_len);
4990 auth_data->data_len += req->ie_len;
4993 if (req->key && req->key_len) {
4994 auth_data->key_len = req->key_len;
4995 auth_data->key_idx = req->key_idx;
4996 memcpy(auth_data->key, req->key, req->key_len);
4999 auth_data->algorithm = auth_alg;
5001 /* try to authenticate/probe */
5003 if (ifmgd->auth_data) {
5004 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5005 auth_data->peer_confirmed =
5006 ifmgd->auth_data->peer_confirmed;
5008 ieee80211_destroy_auth_data(sdata, cont_auth);
5011 /* prep auth_data so we don't go into idle on disassoc */
5012 ifmgd->auth_data = auth_data;
5014 /* If this is continuation of an ongoing SAE authentication exchange
5015 * (i.e., request to send SAE Confirm) and the peer has already
5016 * confirmed, mark authentication completed since we are about to send
5019 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5020 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5021 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5023 if (ifmgd->associated) {
5024 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5027 "disconnect from AP %pM for new auth to %pM\n",
5028 ifmgd->associated->bssid, req->bss->bssid);
5029 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5030 WLAN_REASON_UNSPECIFIED,
5033 ieee80211_report_disconnect(sdata, frame_buf,
5034 sizeof(frame_buf), true,
5035 WLAN_REASON_UNSPECIFIED);
5038 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5040 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5044 err = ieee80211_auth(sdata);
5046 sta_info_destroy_addr(sdata, req->bss->bssid);
5050 /* hold our own reference */
5051 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5055 eth_zero_addr(ifmgd->bssid);
5056 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5057 ifmgd->auth_data = NULL;
5058 mutex_lock(&sdata->local->mtx);
5059 ieee80211_vif_release_channel(sdata);
5060 mutex_unlock(&sdata->local->mtx);
5065 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5066 struct cfg80211_assoc_request *req)
5068 struct ieee80211_local *local = sdata->local;
5069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5070 struct ieee80211_bss *bss = (void *)req->bss->priv;
5071 struct ieee80211_mgd_assoc_data *assoc_data;
5072 const struct cfg80211_bss_ies *beacon_ies;
5073 struct ieee80211_supported_band *sband;
5074 const u8 *ssidie, *ht_ie, *vht_ie;
5076 bool override = false;
5078 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5083 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5089 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5090 assoc_data->ssid_len = ssidie[1];
5093 if (ifmgd->associated) {
5094 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5097 "disconnect from AP %pM for new assoc to %pM\n",
5098 ifmgd->associated->bssid, req->bss->bssid);
5099 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5100 WLAN_REASON_UNSPECIFIED,
5103 ieee80211_report_disconnect(sdata, frame_buf,
5104 sizeof(frame_buf), true,
5105 WLAN_REASON_UNSPECIFIED);
5108 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5113 if (ifmgd->assoc_data) {
5118 if (ifmgd->auth_data) {
5121 /* keep sta info, bssid if matching */
5122 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5123 ieee80211_destroy_auth_data(sdata, match);
5126 /* prepare assoc data */
5128 ifmgd->beacon_crc_valid = false;
5130 assoc_data->wmm = bss->wmm_used &&
5131 (local->hw.queues >= IEEE80211_NUM_ACS);
5134 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5135 * We still associate in non-HT mode (11a/b/g) if any one of these
5136 * ciphers is configured as pairwise.
5137 * We can set this to true for non-11n hardware, that'll be checked
5138 * separately along with the peer capabilities.
5140 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5141 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5142 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5143 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5144 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5145 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5146 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5147 netdev_info(sdata->dev,
5148 "disabling HE/HT/VHT due to WEP/TKIP use\n");
5152 /* Also disable HT if we don't support it or the AP doesn't use WMM */
5153 sband = local->hw.wiphy->bands[req->bss->channel->band];
5154 if (!sband->ht_cap.ht_supported ||
5155 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5156 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5157 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5158 if (!bss->wmm_used &&
5159 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5160 netdev_info(sdata->dev,
5161 "disabling HT as WMM/QoS is not supported by the AP\n");
5164 /* disable VHT if we don't support it or the AP doesn't use WMM */
5165 if (!sband->vht_cap.vht_supported ||
5166 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5167 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5168 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5169 if (!bss->wmm_used &&
5170 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5171 netdev_info(sdata->dev,
5172 "disabling VHT as WMM/QoS is not supported by the AP\n");
5175 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5176 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5177 sizeof(ifmgd->ht_capa_mask));
5179 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5180 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5181 sizeof(ifmgd->vht_capa_mask));
5183 if (req->ie && req->ie_len) {
5184 memcpy(assoc_data->ie, req->ie, req->ie_len);
5185 assoc_data->ie_len = req->ie_len;
5188 if (req->fils_kek) {
5189 /* should already be checked in cfg80211 - so warn */
5190 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5194 memcpy(assoc_data->fils_kek, req->fils_kek,
5196 assoc_data->fils_kek_len = req->fils_kek_len;
5199 if (req->fils_nonces)
5200 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5201 2 * FILS_NONCE_LEN);
5203 assoc_data->bss = req->bss;
5205 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5206 if (ifmgd->powersave)
5207 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5209 sdata->smps_mode = IEEE80211_SMPS_OFF;
5211 sdata->smps_mode = ifmgd->req_smps;
5213 assoc_data->capability = req->bss->capability;
5214 assoc_data->supp_rates = bss->supp_rates;
5215 assoc_data->supp_rates_len = bss->supp_rates_len;
5218 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5219 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5220 assoc_data->ap_ht_param =
5221 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5223 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5224 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5225 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5226 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5227 sizeof(struct ieee80211_vht_cap));
5229 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5232 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5233 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5234 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5235 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5237 if (bss->wmm_used && bss->uapsd_supported &&
5238 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5239 assoc_data->uapsd = true;
5240 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5242 assoc_data->uapsd = false;
5243 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5246 if (req->prev_bssid)
5247 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5250 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5251 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5253 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5254 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5257 if (req->flags & ASSOC_REQ_USE_RRM)
5258 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5260 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5262 if (req->crypto.control_port)
5263 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5265 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5267 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5268 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5269 sdata->control_port_over_nl80211 =
5270 req->crypto.control_port_over_nl80211;
5271 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5274 /* kick off associate process */
5276 ifmgd->assoc_data = assoc_data;
5277 ifmgd->dtim_period = 0;
5278 ifmgd->have_beacon = false;
5280 /* override HT/VHT configuration only if the AP and we support it */
5281 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5282 struct ieee80211_sta_ht_cap sta_ht_cap;
5284 if (req->flags & ASSOC_REQ_DISABLE_HT)
5287 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5288 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5290 /* check for 40 MHz disable override */
5291 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5292 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5293 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5296 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5297 req->flags & ASSOC_REQ_DISABLE_VHT)
5301 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5302 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5303 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5306 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5307 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5309 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5314 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5316 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5319 * Wait up to one beacon interval ...
5320 * should this be more if we miss one?
5322 sdata_info(sdata, "waiting for beacon from %pM\n",
5324 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5325 assoc_data->timeout_started = true;
5326 assoc_data->need_beacon = true;
5327 } else if (beacon_ies) {
5328 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
5333 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
5334 const struct ieee80211_tim_ie *tim;
5335 tim = (void *)(tim_ie + 2);
5336 ifmgd->dtim_period = tim->dtim_period;
5337 dtim_count = tim->dtim_count;
5339 ifmgd->have_beacon = true;
5340 assoc_data->timeout = jiffies;
5341 assoc_data->timeout_started = true;
5343 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5344 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5345 sdata->vif.bss_conf.sync_device_ts =
5346 bss->device_ts_beacon;
5347 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5350 assoc_data->timeout = jiffies;
5351 assoc_data->timeout_started = true;
5355 run_again(sdata, assoc_data->timeout);
5357 if (bss->corrupt_data) {
5358 char *corrupt_type = "data";
5359 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5360 if (bss->corrupt_data &
5361 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5362 corrupt_type = "beacon and probe response";
5364 corrupt_type = "beacon";
5365 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5366 corrupt_type = "probe response";
5367 sdata_info(sdata, "associating with AP with corrupt %s\n",
5373 eth_zero_addr(ifmgd->bssid);
5374 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5375 ifmgd->assoc_data = NULL;
5381 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5382 struct cfg80211_deauth_request *req)
5384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5385 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5386 bool tx = !req->local_state_change;
5388 if (ifmgd->auth_data &&
5389 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5391 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5392 req->bssid, req->reason_code,
5393 ieee80211_get_reason_code_string(req->reason_code));
5395 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5396 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5397 IEEE80211_STYPE_DEAUTH,
5398 req->reason_code, tx,
5400 ieee80211_destroy_auth_data(sdata, false);
5401 ieee80211_report_disconnect(sdata, frame_buf,
5402 sizeof(frame_buf), true,
5408 if (ifmgd->assoc_data &&
5409 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5411 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5412 req->bssid, req->reason_code,
5413 ieee80211_get_reason_code_string(req->reason_code));
5415 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5416 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5417 IEEE80211_STYPE_DEAUTH,
5418 req->reason_code, tx,
5420 ieee80211_destroy_assoc_data(sdata, false, true);
5421 ieee80211_report_disconnect(sdata, frame_buf,
5422 sizeof(frame_buf), true,
5427 if (ifmgd->associated &&
5428 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5430 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5431 req->bssid, req->reason_code,
5432 ieee80211_get_reason_code_string(req->reason_code));
5434 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5435 req->reason_code, tx, frame_buf);
5436 ieee80211_report_disconnect(sdata, frame_buf,
5437 sizeof(frame_buf), true,
5445 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5446 struct cfg80211_disassoc_request *req)
5448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5450 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5453 * cfg80211 should catch this ... but it's racy since
5454 * we can receive a disassoc frame, process it, hand it
5455 * to cfg80211 while that's in a locked section already
5456 * trying to tell us that the user wants to disconnect.
5458 if (ifmgd->associated != req->bss)
5462 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5463 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5465 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5466 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5467 req->reason_code, !req->local_state_change,
5470 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5476 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5481 * Make sure some work items will not run after this,
5482 * they will not do anything but might not have been
5483 * cancelled when disconnecting.
5485 cancel_work_sync(&ifmgd->monitor_work);
5486 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5487 cancel_work_sync(&ifmgd->request_smps_work);
5488 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5489 cancel_work_sync(&ifmgd->chswitch_work);
5490 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5493 if (ifmgd->assoc_data) {
5494 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5495 ieee80211_destroy_assoc_data(sdata, false, false);
5496 cfg80211_assoc_timeout(sdata->dev, bss);
5498 if (ifmgd->auth_data)
5499 ieee80211_destroy_auth_data(sdata, false);
5500 spin_lock_bh(&ifmgd->teardown_lock);
5501 if (ifmgd->teardown_skb) {
5502 kfree_skb(ifmgd->teardown_skb);
5503 ifmgd->teardown_skb = NULL;
5504 ifmgd->orig_teardown_skb = NULL;
5506 spin_unlock_bh(&ifmgd->teardown_lock);
5507 del_timer_sync(&ifmgd->timer);
5508 sdata_unlock(sdata);
5511 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5512 enum nl80211_cqm_rssi_threshold_event rssi_event,
5516 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5518 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5520 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5522 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5524 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5526 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5528 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5530 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5532 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);