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 - 2016 Intel Deutschland GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
33 #include "fils_aead.h"
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
45 static int max_nullfunc_tries = 2;
46 module_param(max_nullfunc_tries, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
50 static int max_probe_tries = 5;
51 module_param(max_probe_tries, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
63 static int beacon_loss_count = 7;
64 module_param(beacon_loss_count, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
78 static int probe_wait_ms = 500;
79 module_param(probe_wait_ms, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
100 static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
103 sdata_assert_lock(sdata);
105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
126 if (unlikely(!ifmgd->associated))
129 if (ifmgd->probe_send_count)
130 ifmgd->probe_send_count = 0;
132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
135 mod_timer(&ifmgd->conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
139 static int ecw2cw(int ecw)
141 return (1 << ecw) - 1;
145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
146 struct ieee80211_supported_band *sband,
147 struct ieee80211_channel *channel,
148 const struct ieee80211_ht_cap *ht_cap,
149 const struct ieee80211_ht_operation *ht_oper,
150 const struct ieee80211_vht_operation *vht_oper,
151 struct cfg80211_chan_def *chandef, bool tracking)
153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
154 struct cfg80211_chan_def vht_chandef;
155 struct ieee80211_sta_ht_cap sta_ht_cap;
158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
161 chandef->chan = channel;
162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
163 chandef->center_freq1 = channel->center_freq;
164 chandef->center_freq2 = 0;
166 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
171 chandef->width = NL80211_CHAN_WIDTH_20;
173 if (!(ht_cap->cap_info &
174 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
175 ret = IEEE80211_STA_DISABLE_40MHZ;
176 vht_chandef = *chandef;
180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
182 /* check that channel matches the right operating channel */
183 if (!tracking && channel->center_freq != ht_cfreq) {
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
199 /* check 40 MHz support, if we have it */
200 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 ieee80211_chandef_ht_oper(ht_oper, chandef);
203 /* 40 MHz (and 80 MHz) must be supported for VHT */
204 ret = IEEE80211_STA_DISABLE_VHT;
205 /* also mark 40 MHz disabled */
206 ret |= IEEE80211_STA_DISABLE_40MHZ;
210 if (!vht_oper || !sband->vht_cap.vht_supported) {
211 ret = IEEE80211_STA_DISABLE_VHT;
215 vht_chandef = *chandef;
216 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
219 "AP VHT information is invalid, disable VHT\n");
220 ret = IEEE80211_STA_DISABLE_VHT;
224 if (!cfg80211_chandef_valid(&vht_chandef)) {
225 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
227 "AP VHT information is invalid, disable VHT\n");
228 ret = IEEE80211_STA_DISABLE_VHT;
232 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
237 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
238 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
240 "AP VHT information doesn't match HT, disable VHT\n");
241 ret = IEEE80211_STA_DISABLE_VHT;
245 *chandef = vht_chandef;
251 * When tracking the current AP, don't do any further checks if the
252 * new chandef is identical to the one we're currently using for the
253 * connection. This keeps us from playing ping-pong with regulatory,
254 * without it the following can happen (for example):
255 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
256 * - AP advertises regdom US
257 * - CRDA loads regdom US with 80 MHz prohibited (old database)
258 * - the code below detects an unsupported channel, downgrades, and
259 * we disconnect from the AP in the caller
260 * - disconnect causes CRDA to reload world regdomain and the game
262 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
264 * It seems possible that there are still scenarios with CSA or real
265 * bandwidth changes where a this could happen, but those cases are
266 * less common and wouldn't completely prevent using the AP.
269 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
272 /* don't print the message below for VHT mismatch if VHT is disabled */
273 if (ret & IEEE80211_STA_DISABLE_VHT)
274 vht_chandef = *chandef;
277 * Ignore the DISABLED flag when we're already connected and only
278 * tracking the APs beacon for bandwidth changes - otherwise we
279 * might get disconnected here if we connect to an AP, update our
280 * regulatory information based on the AP's country IE and the
281 * information we have is wrong/outdated and disables the channel
282 * that we're actually using for the connection to the AP.
284 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
286 IEEE80211_CHAN_DISABLED)) {
287 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
288 ret = IEEE80211_STA_DISABLE_HT |
289 IEEE80211_STA_DISABLE_VHT;
293 ret |= ieee80211_chandef_downgrade(chandef);
296 if (chandef->width != vht_chandef.width && !tracking)
298 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
300 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
305 struct sta_info *sta,
306 const struct ieee80211_ht_cap *ht_cap,
307 const struct ieee80211_ht_operation *ht_oper,
308 const struct ieee80211_vht_operation *vht_oper,
309 const u8 *bssid, u32 *changed)
311 struct ieee80211_local *local = sdata->local;
312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
313 struct ieee80211_supported_band *sband;
314 struct ieee80211_channel *chan;
315 struct cfg80211_chan_def chandef;
318 enum ieee80211_sta_rx_bandwidth new_sta_bw;
321 /* if HT was/is disabled, don't track any bandwidth changes */
322 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
325 /* don't check VHT if we associated as non-VHT station */
326 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
329 if (WARN_ON_ONCE(!sta))
333 * if bss configuration changed store the new one -
334 * this may be applicable even if channel is identical
336 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
337 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
338 *changed |= BSS_CHANGED_HT;
339 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
342 chan = sdata->vif.bss_conf.chandef.chan;
343 sband = local->hw.wiphy->bands[chan->band];
345 /* calculate new channel (type) based on HT/VHT operation IEs */
346 flags = ieee80211_determine_chantype(sdata, sband, chan,
347 ht_cap, ht_oper, vht_oper,
351 * Downgrade the new channel if we associated with restricted
352 * capabilities. For example, if we associated as a 20 MHz STA
353 * to a 40 MHz AP (due to regulatory, capabilities or config
354 * reasons) then switching to a 40 MHz channel now won't do us
355 * any good -- we couldn't use it with the AP.
357 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
358 chandef.width == NL80211_CHAN_WIDTH_80P80)
359 flags |= ieee80211_chandef_downgrade(&chandef);
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
361 chandef.width == NL80211_CHAN_WIDTH_160)
362 flags |= ieee80211_chandef_downgrade(&chandef);
363 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
364 chandef.width > NL80211_CHAN_WIDTH_20)
365 flags |= ieee80211_chandef_downgrade(&chandef);
367 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
371 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
372 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
373 chandef.center_freq1, chandef.center_freq2);
375 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
376 IEEE80211_STA_DISABLE_VHT |
377 IEEE80211_STA_DISABLE_40MHZ |
378 IEEE80211_STA_DISABLE_80P80MHZ |
379 IEEE80211_STA_DISABLE_160MHZ)) ||
380 !cfg80211_chandef_valid(&chandef)) {
382 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
387 switch (chandef.width) {
388 case NL80211_CHAN_WIDTH_20_NOHT:
389 case NL80211_CHAN_WIDTH_20:
390 new_sta_bw = IEEE80211_STA_RX_BW_20;
392 case NL80211_CHAN_WIDTH_40:
393 new_sta_bw = IEEE80211_STA_RX_BW_40;
395 case NL80211_CHAN_WIDTH_80:
396 new_sta_bw = IEEE80211_STA_RX_BW_80;
398 case NL80211_CHAN_WIDTH_80P80:
399 case NL80211_CHAN_WIDTH_160:
400 new_sta_bw = IEEE80211_STA_RX_BW_160;
406 if (new_sta_bw > sta->cur_max_bandwidth)
407 new_sta_bw = sta->cur_max_bandwidth;
409 if (new_sta_bw < sta->sta.bandwidth) {
410 sta->sta.bandwidth = new_sta_bw;
411 rate_control_rate_update(local, sband, sta,
412 IEEE80211_RC_BW_CHANGED);
415 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
418 "AP %pM changed bandwidth to incompatible one - disconnect\n",
423 if (new_sta_bw > sta->sta.bandwidth) {
424 sta->sta.bandwidth = new_sta_bw;
425 rate_control_rate_update(local, sband, sta,
426 IEEE80211_RC_BW_CHANGED);
432 /* frame sending functions */
434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
435 struct sk_buff *skb, u8 ap_ht_param,
436 struct ieee80211_supported_band *sband,
437 struct ieee80211_channel *channel,
438 enum ieee80211_smps_mode smps)
441 u32 flags = channel->flags;
443 struct ieee80211_sta_ht_cap ht_cap;
445 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
447 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
448 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
450 /* determine capability flags */
453 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
454 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
455 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
456 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
457 cap &= ~IEEE80211_HT_CAP_SGI_40;
460 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
461 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
462 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
463 cap &= ~IEEE80211_HT_CAP_SGI_40;
469 * If 40 MHz was disabled associate as though we weren't
470 * capable of 40 MHz -- some broken APs will never fall
471 * back to trying to transmit in 20 MHz.
473 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
475 cap &= ~IEEE80211_HT_CAP_SGI_40;
478 /* set SM PS mode properly */
479 cap &= ~IEEE80211_HT_CAP_SM_PS;
481 case IEEE80211_SMPS_AUTOMATIC:
482 case IEEE80211_SMPS_NUM_MODES:
484 case IEEE80211_SMPS_OFF:
485 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
486 IEEE80211_HT_CAP_SM_PS_SHIFT;
488 case IEEE80211_SMPS_STATIC:
489 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
490 IEEE80211_HT_CAP_SM_PS_SHIFT;
492 case IEEE80211_SMPS_DYNAMIC:
493 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
494 IEEE80211_HT_CAP_SM_PS_SHIFT;
498 /* reserve and fill IE */
499 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
500 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
503 /* This function determines vht capability flags for the association
505 * Note - the function may set the owner of the MU-MIMO capability
507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
509 struct ieee80211_supported_band *sband,
510 struct ieee80211_vht_cap *ap_vht_cap)
512 struct ieee80211_local *local = sdata->local;
515 struct ieee80211_sta_vht_cap vht_cap;
516 u32 mask, ap_bf_sts, our_bf_sts;
518 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
520 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
521 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
523 /* determine capability flags */
526 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
527 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
529 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
530 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
531 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
532 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
536 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
537 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
541 * Some APs apparently get confused if our capabilities are better
542 * than theirs, so restrict what we advertise in the assoc request.
544 if (!(ap_vht_cap->vht_cap_info &
545 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
546 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
547 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
548 else if (!(ap_vht_cap->vht_cap_info &
549 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
550 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
553 * If some other vif is using the MU-MIMO capablity we cannot associate
554 * using MU-MIMO - this will lead to contradictions in the group-id
556 * Ownership is defined since association request, in order to avoid
557 * simultaneous associations with MU-MIMO.
559 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
560 bool disable_mu_mimo = false;
561 struct ieee80211_sub_if_data *other;
563 list_for_each_entry_rcu(other, &local->interfaces, list) {
564 if (other->vif.mu_mimo_owner) {
565 disable_mu_mimo = true;
570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
572 sdata->vif.mu_mimo_owner = true;
575 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
577 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
578 our_bf_sts = cap & mask;
580 if (ap_bf_sts < our_bf_sts) {
585 /* reserve and fill IE */
586 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
587 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
592 struct ieee80211_local *local = sdata->local;
593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
594 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
596 struct ieee80211_mgmt *mgmt;
598 size_t offset = 0, noffset;
599 int i, count, rates_len, supp_rates_len, shift;
601 struct ieee80211_supported_band *sband;
602 struct ieee80211_chanctx_conf *chanctx_conf;
603 struct ieee80211_channel *chan;
604 u32 rate_flags, rates = 0;
606 sdata_assert_lock(sdata);
609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
610 if (WARN_ON(!chanctx_conf)) {
614 chan = chanctx_conf->def.chan;
615 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
617 sband = local->hw.wiphy->bands[chan->band];
618 shift = ieee80211_vif_get_shift(&sdata->vif);
620 if (assoc_data->supp_rates_len) {
622 * Get all rates supported by the device and the AP as
623 * some APs don't like getting a superset of their rates
624 * in the association request (e.g. D-Link DAP 1353 in
627 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
628 assoc_data->supp_rates,
629 assoc_data->supp_rates_len,
633 * In case AP not provide any supported rates information
634 * before association, we send information element(s) with
635 * all rates that we support.
638 for (i = 0; i < sband->n_bitrates; i++) {
639 if ((rate_flags & sband->bitrates[i].flags)
647 skb = alloc_skb(local->hw.extra_tx_headroom +
648 sizeof(*mgmt) + /* bit too much but doesn't matter */
649 2 + assoc_data->ssid_len + /* SSID */
650 4 + rates_len + /* (extended) rates */
651 4 + /* power capability */
652 2 + 2 * sband->n_channels + /* supported channels */
653 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
654 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
655 assoc_data->ie_len + /* extra IEs */
656 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
662 skb_reserve(skb, local->hw.extra_tx_headroom);
664 capab = WLAN_CAPABILITY_ESS;
666 if (sband->band == NL80211_BAND_2GHZ) {
667 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
668 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
671 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
672 capab |= WLAN_CAPABILITY_PRIVACY;
674 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
675 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
676 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
678 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
679 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
681 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
683 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
684 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
685 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
687 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
689 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
690 IEEE80211_STYPE_REASSOC_REQ);
691 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
692 mgmt->u.reassoc_req.listen_interval =
693 cpu_to_le16(local->hw.conf.listen_interval);
694 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
699 IEEE80211_STYPE_ASSOC_REQ);
700 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
701 mgmt->u.assoc_req.listen_interval =
702 cpu_to_le16(local->hw.conf.listen_interval);
706 pos = skb_put(skb, 2 + assoc_data->ssid_len);
707 *pos++ = WLAN_EID_SSID;
708 *pos++ = assoc_data->ssid_len;
709 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
711 /* add all rates which were marked to be used above */
712 supp_rates_len = rates_len;
713 if (supp_rates_len > 8)
716 pos = skb_put(skb, supp_rates_len + 2);
717 *pos++ = WLAN_EID_SUPP_RATES;
718 *pos++ = supp_rates_len;
721 for (i = 0; i < sband->n_bitrates; i++) {
722 if (BIT(i) & rates) {
723 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
731 if (rates_len > count) {
732 pos = skb_put(skb, rates_len - count + 2);
733 *pos++ = WLAN_EID_EXT_SUPP_RATES;
734 *pos++ = rates_len - count;
736 for (i++; i < sband->n_bitrates; i++) {
737 if (BIT(i) & rates) {
739 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
746 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
747 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
748 pos = skb_put(skb, 4);
749 *pos++ = WLAN_EID_PWR_CAPABILITY;
751 *pos++ = 0; /* min tx power */
753 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
756 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
757 /* TODO: get this in reg domain format */
758 pos = skb_put(skb, 2 * sband->n_channels + 2);
759 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
760 *pos++ = 2 * sband->n_channels;
761 for (i = 0; i < sband->n_channels; i++) {
762 *pos++ = ieee80211_frequency_to_channel(
763 sband->channels[i].center_freq);
764 *pos++ = 1; /* one channel in the subband*/
768 /* if present, add any custom IEs that go before HT */
769 if (assoc_data->ie_len) {
770 static const u8 before_ht[] = {
773 WLAN_EID_EXT_SUPP_RATES,
774 WLAN_EID_PWR_CAPABILITY,
775 WLAN_EID_SUPPORTED_CHANNELS,
778 WLAN_EID_RRM_ENABLED_CAPABILITIES,
779 WLAN_EID_MOBILITY_DOMAIN,
780 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
781 WLAN_EID_RIC_DATA, /* reassoc only */
782 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
784 static const u8 after_ric[] = {
785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
786 WLAN_EID_HT_CAPABILITY,
787 WLAN_EID_BSS_COEX_2040,
788 WLAN_EID_EXT_CAPABILITY,
789 WLAN_EID_QOS_TRAFFIC_CAPA,
790 WLAN_EID_TIM_BCAST_REQ,
791 WLAN_EID_INTERWORKING,
792 /* 60GHz doesn't happen right now */
793 WLAN_EID_VHT_CAPABILITY,
794 WLAN_EID_OPMODE_NOTIF,
797 noffset = ieee80211_ie_split_ric(assoc_data->ie,
800 ARRAY_SIZE(before_ht),
802 ARRAY_SIZE(after_ric),
804 pos = skb_put(skb, noffset - offset);
805 memcpy(pos, assoc_data->ie + offset, noffset - offset);
809 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
810 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
811 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
813 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
814 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
815 sband, chan, sdata->smps_mode);
817 /* if present, add any custom IEs that go before VHT */
818 if (assoc_data->ie_len) {
819 static const u8 before_vht[] = {
822 WLAN_EID_EXT_SUPP_RATES,
823 WLAN_EID_PWR_CAPABILITY,
824 WLAN_EID_SUPPORTED_CHANNELS,
827 WLAN_EID_RRM_ENABLED_CAPABILITIES,
828 WLAN_EID_MOBILITY_DOMAIN,
829 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
830 WLAN_EID_HT_CAPABILITY,
831 WLAN_EID_BSS_COEX_2040,
832 WLAN_EID_EXT_CAPABILITY,
833 WLAN_EID_QOS_TRAFFIC_CAPA,
834 WLAN_EID_TIM_BCAST_REQ,
835 WLAN_EID_INTERWORKING,
838 /* RIC already taken above, so no need to handle here anymore */
839 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
840 before_vht, ARRAY_SIZE(before_vht),
842 pos = skb_put(skb, noffset - offset);
843 memcpy(pos, assoc_data->ie + offset, noffset - offset);
847 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
848 ieee80211_add_vht_ie(sdata, skb, sband,
849 &assoc_data->ap_vht_cap);
851 /* if present, add any custom non-vendor IEs that go after HT */
852 if (assoc_data->ie_len) {
853 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
856 pos = skb_put(skb, noffset - offset);
857 memcpy(pos, assoc_data->ie + offset, noffset - offset);
861 if (assoc_data->wmm) {
862 if (assoc_data->uapsd) {
863 qos_info = ifmgd->uapsd_queues;
864 qos_info |= (ifmgd->uapsd_max_sp_len <<
865 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
870 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
873 /* add any remaining custom (i.e. vendor specific here) IEs */
874 if (assoc_data->ie_len) {
875 noffset = assoc_data->ie_len;
876 pos = skb_put(skb, noffset - offset);
877 memcpy(pos, assoc_data->ie + offset, noffset - offset);
880 if (assoc_data->fils_kek_len &&
881 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
886 drv_mgd_prepare_tx(local, sdata);
888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
889 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
891 IEEE80211_TX_INTFL_MLME_CONN_TX;
892 ieee80211_tx_skb(sdata, skb);
895 void ieee80211_send_pspoll(struct ieee80211_local *local,
896 struct ieee80211_sub_if_data *sdata)
898 struct ieee80211_pspoll *pspoll;
901 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
905 pspoll = (struct ieee80211_pspoll *) skb->data;
906 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
909 ieee80211_tx_skb(sdata, skb);
912 void ieee80211_send_nullfunc(struct ieee80211_local *local,
913 struct ieee80211_sub_if_data *sdata,
917 struct ieee80211_hdr_3addr *nullfunc;
918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
920 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
924 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
926 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
929 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
931 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
934 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
935 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
937 ieee80211_tx_skb(sdata, skb);
940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
941 struct ieee80211_sub_if_data *sdata)
944 struct ieee80211_hdr *nullfunc;
947 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
954 skb_reserve(skb, local->hw.extra_tx_headroom);
956 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
957 memset(nullfunc, 0, 30);
958 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
959 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
960 nullfunc->frame_control = fc;
961 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
962 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
963 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
964 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
966 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
967 ieee80211_tx_skb(sdata, skb);
970 /* spectrum management related things */
971 static void ieee80211_chswitch_work(struct work_struct *work)
973 struct ieee80211_sub_if_data *sdata =
974 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
975 struct ieee80211_local *local = sdata->local;
976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
979 if (!ieee80211_sdata_running(sdata))
983 mutex_lock(&local->mtx);
984 mutex_lock(&local->chanctx_mtx);
986 if (!ifmgd->associated)
989 if (!sdata->vif.csa_active)
993 * using reservation isn't immediate as it may be deferred until later
994 * with multi-vif. once reservation is complete it will re-schedule the
995 * work with no reserved_chanctx so verify chandef to check if it
996 * completed successfully
999 if (sdata->reserved_chanctx) {
1001 * with multi-vif csa driver may call ieee80211_csa_finish()
1002 * many times while waiting for other interfaces to use their
1005 if (sdata->reserved_ready)
1008 ret = ieee80211_vif_use_reserved_context(sdata);
1011 "failed to use reserved channel context, disconnecting (err=%d)\n",
1013 ieee80211_queue_work(&sdata->local->hw,
1014 &ifmgd->csa_connection_drop_work);
1021 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1022 &sdata->csa_chandef)) {
1024 "failed to finalize channel switch, disconnecting\n");
1025 ieee80211_queue_work(&sdata->local->hw,
1026 &ifmgd->csa_connection_drop_work);
1030 /* XXX: shouldn't really modify cfg80211-owned data! */
1031 ifmgd->associated->channel = sdata->csa_chandef.chan;
1033 ifmgd->csa_waiting_bcn = true;
1035 ieee80211_sta_reset_beacon_monitor(sdata);
1036 ieee80211_sta_reset_conn_monitor(sdata);
1039 mutex_unlock(&local->chanctx_mtx);
1040 mutex_unlock(&local->mtx);
1041 sdata_unlock(sdata);
1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1046 struct ieee80211_local *local = sdata->local;
1047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1050 sdata_assert_lock(sdata);
1052 WARN_ON(!sdata->vif.csa_active);
1054 if (sdata->csa_block_tx) {
1055 ieee80211_wake_vif_queues(local, sdata,
1056 IEEE80211_QUEUE_STOP_REASON_CSA);
1057 sdata->csa_block_tx = false;
1060 sdata->vif.csa_active = false;
1061 ifmgd->csa_waiting_bcn = false;
1063 ret = drv_post_channel_switch(sdata);
1066 "driver post channel switch failed, disconnecting\n");
1067 ieee80211_queue_work(&local->hw,
1068 &ifmgd->csa_connection_drop_work);
1072 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1077 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1078 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1080 trace_api_chswitch_done(sdata, success);
1083 "driver channel switch failed, disconnecting\n");
1084 ieee80211_queue_work(&sdata->local->hw,
1085 &ifmgd->csa_connection_drop_work);
1087 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1090 EXPORT_SYMBOL(ieee80211_chswitch_done);
1092 static void ieee80211_chswitch_timer(unsigned long data)
1094 struct ieee80211_sub_if_data *sdata =
1095 (struct ieee80211_sub_if_data *) data;
1097 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1102 u64 timestamp, u32 device_timestamp,
1103 struct ieee802_11_elems *elems,
1106 struct ieee80211_local *local = sdata->local;
1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1108 struct cfg80211_bss *cbss = ifmgd->associated;
1109 struct ieee80211_chanctx_conf *conf;
1110 struct ieee80211_chanctx *chanctx;
1111 enum nl80211_band current_band;
1112 struct ieee80211_csa_ie csa_ie;
1113 struct ieee80211_channel_switch ch_switch;
1116 sdata_assert_lock(sdata);
1121 if (local->scanning)
1124 /* disregard subsequent announcements if we are already processing */
1125 if (sdata->vif.csa_active)
1128 current_band = cbss->channel->band;
1129 memset(&csa_ie, 0, sizeof(csa_ie));
1130 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1132 ifmgd->associated->bssid, &csa_ie);
1134 ieee80211_queue_work(&local->hw,
1135 &ifmgd->csa_connection_drop_work);
1139 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1140 IEEE80211_CHAN_DISABLED)) {
1142 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1143 ifmgd->associated->bssid,
1144 csa_ie.chandef.chan->center_freq,
1145 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1146 csa_ie.chandef.center_freq2);
1147 ieee80211_queue_work(&local->hw,
1148 &ifmgd->csa_connection_drop_work);
1152 if (cfg80211_chandef_identical(&csa_ie.chandef,
1153 &sdata->vif.bss_conf.chandef)) {
1154 if (ifmgd->csa_ignored_same_chan)
1157 "AP %pM tries to chanswitch to same channel, ignore\n",
1158 ifmgd->associated->bssid);
1159 ifmgd->csa_ignored_same_chan = true;
1164 * Drop all TDLS peers - either we disconnect or move to a different
1165 * channel from this point on. There's no telling what our peer will do.
1166 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1167 * have an incompatible wider chandef.
1169 ieee80211_teardown_tdls_peers(sdata);
1171 mutex_lock(&local->mtx);
1172 mutex_lock(&local->chanctx_mtx);
1173 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1174 lockdep_is_held(&local->chanctx_mtx));
1177 "no channel context assigned to vif?, disconnecting\n");
1178 goto drop_connection;
1181 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1183 if (local->use_chanctx &&
1184 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1186 "driver doesn't support chan-switch with channel contexts\n");
1187 goto drop_connection;
1190 ch_switch.timestamp = timestamp;
1191 ch_switch.device_timestamp = device_timestamp;
1192 ch_switch.block_tx = csa_ie.mode;
1193 ch_switch.chandef = csa_ie.chandef;
1194 ch_switch.count = csa_ie.count;
1196 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1198 "preparing for channel switch failed, disconnecting\n");
1199 goto drop_connection;
1202 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1203 chanctx->mode, false);
1206 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1208 goto drop_connection;
1210 mutex_unlock(&local->chanctx_mtx);
1212 sdata->vif.csa_active = true;
1213 sdata->csa_chandef = csa_ie.chandef;
1214 sdata->csa_block_tx = csa_ie.mode;
1215 ifmgd->csa_ignored_same_chan = false;
1217 if (sdata->csa_block_tx)
1218 ieee80211_stop_vif_queues(local, sdata,
1219 IEEE80211_QUEUE_STOP_REASON_CSA);
1220 mutex_unlock(&local->mtx);
1222 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1225 if (local->ops->channel_switch) {
1226 /* use driver's channel switch callback */
1227 drv_channel_switch(local, sdata, &ch_switch);
1231 /* channel switch handled in software */
1232 if (csa_ie.count <= 1)
1233 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1235 mod_timer(&ifmgd->chswitch_timer,
1236 TU_TO_EXP_TIME((csa_ie.count - 1) *
1237 cbss->beacon_interval));
1240 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1241 mutex_unlock(&local->chanctx_mtx);
1242 mutex_unlock(&local->mtx);
1246 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1247 struct ieee80211_channel *channel,
1248 const u8 *country_ie, u8 country_ie_len,
1249 const u8 *pwr_constr_elem,
1250 int *chan_pwr, int *pwr_reduction)
1252 struct ieee80211_country_ie_triplet *triplet;
1253 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1254 int i, chan_increment;
1255 bool have_chan_pwr = false;
1258 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1261 triplet = (void *)(country_ie + 3);
1262 country_ie_len -= 3;
1264 switch (channel->band) {
1268 case NL80211_BAND_2GHZ:
1269 case NL80211_BAND_60GHZ:
1272 case NL80211_BAND_5GHZ:
1278 while (country_ie_len >= 3) {
1279 u8 first_channel = triplet->chans.first_channel;
1281 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1284 for (i = 0; i < triplet->chans.num_channels; i++) {
1285 if (first_channel + i * chan_increment == chan) {
1286 have_chan_pwr = true;
1287 *chan_pwr = triplet->chans.max_power;
1296 country_ie_len -= 3;
1299 if (have_chan_pwr && pwr_constr_elem)
1300 *pwr_reduction = *pwr_constr_elem;
1304 return have_chan_pwr;
1307 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1308 struct ieee80211_channel *channel,
1309 const u8 *cisco_dtpc_ie,
1312 /* From practical testing, the first data byte of the DTPC element
1313 * seems to contain the requested dBm level, and the CLI on Cisco
1314 * APs clearly state the range is -127 to 127 dBm, which indicates
1315 * a signed byte, although it seemingly never actually goes negative.
1316 * The other byte seems to always be zero.
1318 *pwr_level = (__s8)cisco_dtpc_ie[4];
1321 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1322 struct ieee80211_channel *channel,
1323 struct ieee80211_mgmt *mgmt,
1324 const u8 *country_ie, u8 country_ie_len,
1325 const u8 *pwr_constr_ie,
1326 const u8 *cisco_dtpc_ie)
1328 bool has_80211h_pwr = false, has_cisco_pwr = false;
1329 int chan_pwr = 0, pwr_reduction_80211h = 0;
1330 int pwr_level_cisco, pwr_level_80211h;
1332 __le16 capab = mgmt->u.probe_resp.capab_info;
1335 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1336 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1337 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1338 sdata, channel, country_ie, country_ie_len,
1339 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1341 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1344 if (cisco_dtpc_ie) {
1345 ieee80211_find_cisco_dtpc(
1346 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1347 has_cisco_pwr = true;
1350 if (!has_80211h_pwr && !has_cisco_pwr)
1353 /* If we have both 802.11h and Cisco DTPC, apply both limits
1354 * by picking the smallest of the two power levels advertised.
1356 if (has_80211h_pwr &&
1357 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1358 new_ap_level = pwr_level_80211h;
1360 if (sdata->ap_power_level == new_ap_level)
1364 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1365 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1366 sdata->u.mgd.bssid);
1367 } else { /* has_cisco_pwr is always true here. */
1368 new_ap_level = pwr_level_cisco;
1370 if (sdata->ap_power_level == new_ap_level)
1374 "Limiting TX power to %d dBm as advertised by %pM\n",
1375 pwr_level_cisco, sdata->u.mgd.bssid);
1378 sdata->ap_power_level = new_ap_level;
1379 if (__ieee80211_recalc_txpower(sdata))
1380 return BSS_CHANGED_TXPOWER;
1385 static void ieee80211_enable_ps(struct ieee80211_local *local,
1386 struct ieee80211_sub_if_data *sdata)
1388 struct ieee80211_conf *conf = &local->hw.conf;
1391 * If we are scanning right now then the parameters will
1392 * take effect when scan finishes.
1394 if (local->scanning)
1397 if (conf->dynamic_ps_timeout > 0 &&
1398 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1399 mod_timer(&local->dynamic_ps_timer, jiffies +
1400 msecs_to_jiffies(conf->dynamic_ps_timeout));
1402 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1403 ieee80211_send_nullfunc(local, sdata, true);
1405 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1406 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1409 conf->flags |= IEEE80211_CONF_PS;
1410 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1414 static void ieee80211_change_ps(struct ieee80211_local *local)
1416 struct ieee80211_conf *conf = &local->hw.conf;
1418 if (local->ps_sdata) {
1419 ieee80211_enable_ps(local, local->ps_sdata);
1420 } else if (conf->flags & IEEE80211_CONF_PS) {
1421 conf->flags &= ~IEEE80211_CONF_PS;
1422 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1423 del_timer_sync(&local->dynamic_ps_timer);
1424 cancel_work_sync(&local->dynamic_ps_enable_work);
1428 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1430 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1431 struct sta_info *sta = NULL;
1432 bool authorized = false;
1434 if (!mgd->powersave)
1440 if (!mgd->associated)
1443 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1446 if (!mgd->have_beacon)
1450 sta = sta_info_get(sdata, mgd->bssid);
1452 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1458 /* need to hold RTNL or interface lock */
1459 void ieee80211_recalc_ps(struct ieee80211_local *local)
1461 struct ieee80211_sub_if_data *sdata, *found = NULL;
1465 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1466 local->ps_sdata = NULL;
1470 list_for_each_entry(sdata, &local->interfaces, list) {
1471 if (!ieee80211_sdata_running(sdata))
1473 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1474 /* If an AP vif is found, then disable PS
1475 * by setting the count to zero thereby setting
1481 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1487 if (count == 1 && ieee80211_powersave_allowed(found)) {
1488 u8 dtimper = found->u.mgd.dtim_period;
1490 timeout = local->dynamic_ps_forced_timeout;
1493 local->hw.conf.dynamic_ps_timeout = timeout;
1495 /* If the TIM IE is invalid, pretend the value is 1 */
1499 local->hw.conf.ps_dtim_period = dtimper;
1500 local->ps_sdata = found;
1502 local->ps_sdata = NULL;
1505 ieee80211_change_ps(local);
1508 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1510 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1512 if (sdata->vif.bss_conf.ps != ps_allowed) {
1513 sdata->vif.bss_conf.ps = ps_allowed;
1514 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1518 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1520 struct ieee80211_local *local =
1521 container_of(work, struct ieee80211_local,
1522 dynamic_ps_disable_work);
1524 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1525 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1526 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1529 ieee80211_wake_queues_by_reason(&local->hw,
1530 IEEE80211_MAX_QUEUE_MAP,
1531 IEEE80211_QUEUE_STOP_REASON_PS,
1535 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1537 struct ieee80211_local *local =
1538 container_of(work, struct ieee80211_local,
1539 dynamic_ps_enable_work);
1540 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1541 struct ieee80211_if_managed *ifmgd;
1542 unsigned long flags;
1545 /* can only happen when PS was just disabled anyway */
1549 ifmgd = &sdata->u.mgd;
1551 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1554 if (local->hw.conf.dynamic_ps_timeout > 0) {
1555 /* don't enter PS if TX frames are pending */
1556 if (drv_tx_frames_pending(local)) {
1557 mod_timer(&local->dynamic_ps_timer, jiffies +
1559 local->hw.conf.dynamic_ps_timeout));
1564 * transmission can be stopped by others which leads to
1565 * dynamic_ps_timer expiry. Postpone the ps timer if it
1566 * is not the actual idle state.
1568 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1569 for (q = 0; q < local->hw.queues; q++) {
1570 if (local->queue_stop_reasons[q]) {
1571 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1573 mod_timer(&local->dynamic_ps_timer, jiffies +
1575 local->hw.conf.dynamic_ps_timeout));
1579 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1582 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1583 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1584 if (drv_tx_frames_pending(local)) {
1585 mod_timer(&local->dynamic_ps_timer, jiffies +
1587 local->hw.conf.dynamic_ps_timeout));
1589 ieee80211_send_nullfunc(local, sdata, true);
1590 /* Flush to get the tx status of nullfunc frame */
1591 ieee80211_flush_queues(local, sdata, false);
1595 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1596 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1597 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1598 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1599 local->hw.conf.flags |= IEEE80211_CONF_PS;
1600 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1604 void ieee80211_dynamic_ps_timer(unsigned long data)
1606 struct ieee80211_local *local = (void *) data;
1608 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1611 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1613 struct delayed_work *delayed_work = to_delayed_work(work);
1614 struct ieee80211_sub_if_data *sdata =
1615 container_of(delayed_work, struct ieee80211_sub_if_data,
1616 dfs_cac_timer_work);
1617 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1619 mutex_lock(&sdata->local->mtx);
1620 if (sdata->wdev.cac_started) {
1621 ieee80211_vif_release_channel(sdata);
1622 cfg80211_cac_event(sdata->dev, &chandef,
1623 NL80211_RADAR_CAC_FINISHED,
1626 mutex_unlock(&sdata->local->mtx);
1630 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1632 struct ieee80211_local *local = sdata->local;
1633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1637 if (local->hw.queues < IEEE80211_NUM_ACS)
1640 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1641 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1643 unsigned long now = jiffies;
1645 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1646 tx_tspec->admitted_time &&
1647 time_after(now, tx_tspec->time_slice_start + HZ)) {
1648 tx_tspec->consumed_tx_time = 0;
1649 tx_tspec->time_slice_start = now;
1651 if (tx_tspec->downgraded)
1653 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1656 switch (tx_tspec->action) {
1657 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1658 /* take the original parameters */
1659 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1661 "failed to set TX queue parameters for queue %d\n",
1663 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1664 tx_tspec->downgraded = false;
1667 case TX_TSPEC_ACTION_DOWNGRADE:
1668 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1669 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1673 /* downgrade next lower non-ACM AC */
1674 for (non_acm_ac = ac + 1;
1675 non_acm_ac < IEEE80211_NUM_ACS;
1677 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1679 /* Usually the loop will result in using BK even if it
1680 * requires admission control, but such a configuration
1681 * makes no sense and we have to transmit somehow - the
1682 * AC selection does the same thing.
1683 * If we started out trying to downgrade from BK, then
1684 * the extra condition here might be needed.
1686 if (non_acm_ac >= IEEE80211_NUM_ACS)
1687 non_acm_ac = IEEE80211_AC_BK;
1688 if (drv_conf_tx(local, sdata, ac,
1689 &sdata->tx_conf[non_acm_ac]))
1691 "failed to set TX queue parameters for queue %d\n",
1693 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1695 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1696 tx_tspec->time_slice_start + HZ - now + 1);
1698 case TX_TSPEC_ACTION_NONE:
1707 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1709 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1710 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1713 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1715 struct ieee80211_sub_if_data *sdata;
1717 sdata = container_of(work, struct ieee80211_sub_if_data,
1718 u.mgd.tx_tspec_wk.work);
1719 ieee80211_sta_handle_tspec_ac_params(sdata);
1723 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1724 struct ieee80211_sub_if_data *sdata,
1725 const u8 *wmm_param, size_t wmm_param_len)
1727 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1732 u8 uapsd_queues = 0;
1734 if (!local->ops->conf_tx)
1737 if (local->hw.queues < IEEE80211_NUM_ACS)
1743 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1746 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1747 uapsd_queues = ifmgd->uapsd_queues;
1749 count = wmm_param[6] & 0x0f;
1750 if (count == ifmgd->wmm_last_param_set)
1752 ifmgd->wmm_last_param_set = count;
1754 pos = wmm_param + 8;
1755 left = wmm_param_len - 8;
1757 memset(¶ms, 0, sizeof(params));
1760 for (; left >= 4; left -= 4, pos += 4) {
1761 int aci = (pos[0] >> 5) & 0x03;
1762 int acm = (pos[0] >> 4) & 0x01;
1767 ac = IEEE80211_AC_BK;
1769 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1770 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1774 ac = IEEE80211_AC_VI;
1776 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1777 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1781 ac = IEEE80211_AC_VO;
1783 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1784 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1789 ac = IEEE80211_AC_BE;
1791 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1792 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1797 params[ac].aifs = pos[0] & 0x0f;
1799 if (params[ac].aifs < 2) {
1801 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1802 params[ac].aifs, aci);
1803 params[ac].aifs = 2;
1805 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1806 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1807 params[ac].txop = get_unaligned_le16(pos + 2);
1808 params[ac].acm = acm;
1809 params[ac].uapsd = uapsd;
1811 if (params[ac].cw_min > params[ac].cw_max) {
1813 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1814 params[ac].cw_min, params[ac].cw_max, aci);
1819 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1821 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1823 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1824 params[ac].txop, params[ac].uapsd,
1825 ifmgd->tx_tspec[ac].downgraded);
1826 sdata->tx_conf[ac] = params[ac];
1827 if (!ifmgd->tx_tspec[ac].downgraded &&
1828 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
1830 "failed to set TX queue parameters for AC %d\n",
1834 /* enable WMM or activate new settings */
1835 sdata->vif.bss_conf.qos = true;
1839 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1841 lockdep_assert_held(&sdata->local->mtx);
1843 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1844 ieee80211_run_deferred_scan(sdata->local);
1847 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1849 mutex_lock(&sdata->local->mtx);
1850 __ieee80211_stop_poll(sdata);
1851 mutex_unlock(&sdata->local->mtx);
1854 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1855 u16 capab, bool erp_valid, u8 erp)
1857 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1859 bool use_protection;
1860 bool use_short_preamble;
1861 bool use_short_slot;
1864 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1865 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1867 use_protection = false;
1868 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1871 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1872 if (ieee80211_get_sdata_band(sdata) == NL80211_BAND_5GHZ)
1873 use_short_slot = true;
1875 if (use_protection != bss_conf->use_cts_prot) {
1876 bss_conf->use_cts_prot = use_protection;
1877 changed |= BSS_CHANGED_ERP_CTS_PROT;
1880 if (use_short_preamble != bss_conf->use_short_preamble) {
1881 bss_conf->use_short_preamble = use_short_preamble;
1882 changed |= BSS_CHANGED_ERP_PREAMBLE;
1885 if (use_short_slot != bss_conf->use_short_slot) {
1886 bss_conf->use_short_slot = use_short_slot;
1887 changed |= BSS_CHANGED_ERP_SLOT;
1893 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1894 struct cfg80211_bss *cbss,
1895 u32 bss_info_changed)
1897 struct ieee80211_bss *bss = (void *)cbss->priv;
1898 struct ieee80211_local *local = sdata->local;
1899 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1901 bss_info_changed |= BSS_CHANGED_ASSOC;
1902 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1903 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1905 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1906 beacon_loss_count * bss_conf->beacon_int));
1908 sdata->u.mgd.associated = cbss;
1909 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1911 ieee80211_check_rate_mask(sdata);
1913 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1915 if (sdata->vif.p2p ||
1916 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1917 const struct cfg80211_bss_ies *ies;
1920 ies = rcu_dereference(cbss->ies);
1924 ret = cfg80211_get_p2p_attr(
1925 ies->data, ies->len,
1926 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1927 (u8 *) &bss_conf->p2p_noa_attr,
1928 sizeof(bss_conf->p2p_noa_attr));
1930 sdata->u.mgd.p2p_noa_index =
1931 bss_conf->p2p_noa_attr.index;
1932 bss_info_changed |= BSS_CHANGED_P2P_PS;
1938 /* just to be sure */
1939 ieee80211_stop_poll(sdata);
1941 ieee80211_led_assoc(local, 1);
1943 if (sdata->u.mgd.have_beacon) {
1945 * If the AP is buggy we may get here with no DTIM period
1946 * known, so assume it's 1 which is the only safe assumption
1947 * in that case, although if the TIM IE is broken powersave
1948 * probably just won't work at all.
1950 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1951 bss_conf->beacon_rate = bss->beacon_rate;
1952 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1954 bss_conf->beacon_rate = NULL;
1955 bss_conf->dtim_period = 0;
1958 bss_conf->assoc = 1;
1960 /* Tell the driver to monitor connection quality (if supported) */
1961 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1962 bss_conf->cqm_rssi_thold)
1963 bss_info_changed |= BSS_CHANGED_CQM;
1965 /* Enable ARP filtering */
1966 if (bss_conf->arp_addr_cnt)
1967 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1969 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1971 mutex_lock(&local->iflist_mtx);
1972 ieee80211_recalc_ps(local);
1973 mutex_unlock(&local->iflist_mtx);
1975 ieee80211_recalc_smps(sdata);
1976 ieee80211_recalc_ps_vif(sdata);
1978 netif_carrier_on(sdata->dev);
1981 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1982 u16 stype, u16 reason, bool tx,
1985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1986 struct ieee80211_local *local = sdata->local;
1989 sdata_assert_lock(sdata);
1991 if (WARN_ON_ONCE(tx && !frame_buf))
1994 if (WARN_ON(!ifmgd->associated))
1997 ieee80211_stop_poll(sdata);
1999 ifmgd->associated = NULL;
2000 netif_carrier_off(sdata->dev);
2003 * if we want to get out of ps before disassoc (why?) we have
2004 * to do it before sending disassoc, as otherwise the null-packet
2007 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2008 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2009 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2011 local->ps_sdata = NULL;
2013 /* disable per-vif ps */
2014 ieee80211_recalc_ps_vif(sdata);
2016 /* make sure ongoing transmission finishes */
2020 * drop any frame before deauth/disassoc, this can be data or
2021 * management frame. Since we are disconnecting, we should not
2022 * insist sending these frames which can take time and delay
2023 * the disconnection and possible the roaming.
2026 ieee80211_flush_queues(local, sdata, true);
2028 /* deauthenticate/disassociate now */
2029 if (tx || frame_buf)
2030 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2031 reason, tx, frame_buf);
2033 /* flush out frame - make sure the deauth was actually sent */
2035 ieee80211_flush_queues(local, sdata, false);
2037 /* clear bssid only after building the needed mgmt frames */
2038 eth_zero_addr(ifmgd->bssid);
2040 /* remove AP and TDLS peers */
2041 sta_info_flush(sdata);
2043 /* finally reset all BSS / config parameters */
2044 changed |= ieee80211_reset_erp_info(sdata);
2046 ieee80211_led_assoc(local, 0);
2047 changed |= BSS_CHANGED_ASSOC;
2048 sdata->vif.bss_conf.assoc = false;
2050 ifmgd->p2p_noa_index = -1;
2051 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2052 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2054 /* on the next assoc, re-program HT/VHT parameters */
2055 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2056 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2057 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2058 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2060 /* reset MU-MIMO ownership and group data */
2061 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2062 sizeof(sdata->vif.bss_conf.mu_group.membership));
2063 memset(sdata->vif.bss_conf.mu_group.position, 0,
2064 sizeof(sdata->vif.bss_conf.mu_group.position));
2065 changed |= BSS_CHANGED_MU_GROUPS;
2066 sdata->vif.mu_mimo_owner = false;
2068 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2070 del_timer_sync(&local->dynamic_ps_timer);
2071 cancel_work_sync(&local->dynamic_ps_enable_work);
2073 /* Disable ARP filtering */
2074 if (sdata->vif.bss_conf.arp_addr_cnt)
2075 changed |= BSS_CHANGED_ARP_FILTER;
2077 sdata->vif.bss_conf.qos = false;
2078 changed |= BSS_CHANGED_QOS;
2080 /* The BSSID (not really interesting) and HT changed */
2081 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2082 ieee80211_bss_info_change_notify(sdata, changed);
2084 /* disassociated - set to defaults now */
2085 ieee80211_set_wmm_default(sdata, false, false);
2087 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2088 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2089 del_timer_sync(&sdata->u.mgd.timer);
2090 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2092 sdata->vif.bss_conf.dtim_period = 0;
2093 sdata->vif.bss_conf.beacon_rate = NULL;
2095 ifmgd->have_beacon = false;
2098 mutex_lock(&local->mtx);
2099 ieee80211_vif_release_channel(sdata);
2101 sdata->vif.csa_active = false;
2102 ifmgd->csa_waiting_bcn = false;
2103 ifmgd->csa_ignored_same_chan = false;
2104 if (sdata->csa_block_tx) {
2105 ieee80211_wake_vif_queues(local, sdata,
2106 IEEE80211_QUEUE_STOP_REASON_CSA);
2107 sdata->csa_block_tx = false;
2109 mutex_unlock(&local->mtx);
2111 /* existing TX TSPEC sessions no longer exist */
2112 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2113 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2115 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2118 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2119 struct ieee80211_hdr *hdr)
2122 * We can postpone the mgd.timer whenever receiving unicast frames
2123 * from AP because we know that the connection is working both ways
2124 * at that time. But multicast frames (and hence also beacons) must
2125 * be ignored here, because we need to trigger the timer during
2126 * data idle periods for sending the periodic probe request to the
2127 * AP we're connected to.
2129 if (is_multicast_ether_addr(hdr->addr1))
2132 ieee80211_sta_reset_conn_monitor(sdata);
2135 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2138 struct ieee80211_local *local = sdata->local;
2140 mutex_lock(&local->mtx);
2141 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2144 __ieee80211_stop_poll(sdata);
2146 mutex_lock(&local->iflist_mtx);
2147 ieee80211_recalc_ps(local);
2148 mutex_unlock(&local->iflist_mtx);
2150 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2154 * We've received a probe response, but are not sure whether
2155 * we have or will be receiving any beacons or data, so let's
2156 * schedule the timers again, just in case.
2158 ieee80211_sta_reset_beacon_monitor(sdata);
2160 mod_timer(&ifmgd->conn_mon_timer,
2161 round_jiffies_up(jiffies +
2162 IEEE80211_CONNECTION_IDLE_TIME));
2164 mutex_unlock(&local->mtx);
2167 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2168 struct ieee80211_hdr *hdr,
2171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2172 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2173 int ac = ieee80211_ac_from_tid(tid);
2174 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2175 unsigned long now = jiffies;
2177 if (likely(!tx_tspec->admitted_time))
2180 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2181 tx_tspec->consumed_tx_time = 0;
2182 tx_tspec->time_slice_start = now;
2184 if (tx_tspec->downgraded) {
2185 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2186 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2190 if (tx_tspec->downgraded)
2193 tx_tspec->consumed_tx_time += tx_time;
2195 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2196 tx_tspec->downgraded = true;
2197 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2198 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2202 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2203 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2205 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2207 if (!ieee80211_is_data(hdr->frame_control))
2210 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2211 sdata->u.mgd.probe_send_count > 0) {
2213 ieee80211_sta_reset_conn_monitor(sdata);
2215 sdata->u.mgd.nullfunc_failed = true;
2216 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2221 ieee80211_sta_reset_conn_monitor(sdata);
2224 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2226 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2228 u8 *dst = ifmgd->associated->bssid;
2229 u8 unicast_limit = max(1, max_probe_tries - 3);
2230 struct sta_info *sta;
2233 * Try sending broadcast probe requests for the last three
2234 * probe requests after the first ones failed since some
2235 * buggy APs only support broadcast probe requests.
2237 if (ifmgd->probe_send_count >= unicast_limit)
2241 * When the hardware reports an accurate Tx ACK status, it's
2242 * better to send a nullfunc frame instead of a probe request,
2243 * as it will kick us off the AP quickly if we aren't associated
2244 * anymore. The timeout will be reset if the frame is ACKed by
2247 ifmgd->probe_send_count++;
2250 mutex_lock(&sdata->local->sta_mtx);
2251 sta = sta_info_get(sdata, dst);
2253 ieee80211_check_fast_rx(sta);
2254 mutex_unlock(&sdata->local->sta_mtx);
2257 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2258 ifmgd->nullfunc_failed = false;
2259 ieee80211_send_nullfunc(sdata->local, sdata, false);
2264 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2265 if (WARN_ON_ONCE(ssid == NULL))
2270 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2271 ssid + 2, ssid_len, NULL,
2272 0, (u32) -1, true, 0,
2273 ifmgd->associated->channel, false);
2277 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2278 run_again(sdata, ifmgd->probe_timeout);
2281 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2284 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2285 bool already = false;
2287 if (!ieee80211_sdata_running(sdata))
2292 if (!ifmgd->associated)
2295 mutex_lock(&sdata->local->mtx);
2297 if (sdata->local->tmp_channel || sdata->local->scanning) {
2298 mutex_unlock(&sdata->local->mtx);
2303 mlme_dbg_ratelimited(sdata,
2304 "detected beacon loss from AP (missed %d beacons) - probing\n",
2307 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2311 * The driver/our work has already reported this event or the
2312 * connection monitoring has kicked in and we have already sent
2313 * a probe request. Or maybe the AP died and the driver keeps
2314 * reporting until we disassociate...
2316 * In either case we have to ignore the current call to this
2317 * function (except for setting the correct probe reason bit)
2318 * because otherwise we would reset the timer every time and
2319 * never check whether we received a probe response!
2321 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2324 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2326 mutex_unlock(&sdata->local->mtx);
2331 mutex_lock(&sdata->local->iflist_mtx);
2332 ieee80211_recalc_ps(sdata->local);
2333 mutex_unlock(&sdata->local->iflist_mtx);
2335 ifmgd->probe_send_count = 0;
2336 ieee80211_mgd_probe_ap_send(sdata);
2338 sdata_unlock(sdata);
2341 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2342 struct ieee80211_vif *vif)
2344 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2346 struct cfg80211_bss *cbss;
2347 struct sk_buff *skb;
2351 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2354 sdata_assert_lock(sdata);
2356 if (ifmgd->associated)
2357 cbss = ifmgd->associated;
2358 else if (ifmgd->auth_data)
2359 cbss = ifmgd->auth_data->bss;
2360 else if (ifmgd->assoc_data)
2361 cbss = ifmgd->assoc_data->bss;
2366 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2367 if (WARN_ON_ONCE(ssid == NULL))
2372 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2373 (u32) -1, cbss->channel,
2380 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2382 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2383 const u8 *buf, size_t len, bool tx,
2386 struct ieee80211_event event = {
2388 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2389 .u.mlme.reason = reason,
2393 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2395 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2397 drv_event_callback(sdata->local, sdata, &event);
2400 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2402 struct ieee80211_local *local = sdata->local;
2403 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2404 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2407 if (!ifmgd->associated) {
2408 sdata_unlock(sdata);
2412 /* AP is probably out of range (or not reachable for another reason) so
2413 * remove the bss struct for that AP.
2415 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2417 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2418 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2420 mutex_lock(&local->mtx);
2421 sdata->vif.csa_active = false;
2422 ifmgd->csa_waiting_bcn = false;
2423 if (sdata->csa_block_tx) {
2424 ieee80211_wake_vif_queues(local, sdata,
2425 IEEE80211_QUEUE_STOP_REASON_CSA);
2426 sdata->csa_block_tx = false;
2428 mutex_unlock(&local->mtx);
2430 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2431 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2433 sdata_unlock(sdata);
2436 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2438 struct ieee80211_sub_if_data *sdata =
2439 container_of(work, struct ieee80211_sub_if_data,
2440 u.mgd.beacon_connection_loss_work);
2441 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2443 if (ifmgd->associated)
2444 ifmgd->beacon_loss_count++;
2446 if (ifmgd->connection_loss) {
2447 sdata_info(sdata, "Connection to AP %pM lost\n",
2449 __ieee80211_disconnect(sdata);
2451 ieee80211_mgd_probe_ap(sdata, true);
2455 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2457 struct ieee80211_sub_if_data *sdata =
2458 container_of(work, struct ieee80211_sub_if_data,
2459 u.mgd.csa_connection_drop_work);
2461 __ieee80211_disconnect(sdata);
2464 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2466 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2467 struct ieee80211_hw *hw = &sdata->local->hw;
2469 trace_api_beacon_loss(sdata);
2471 sdata->u.mgd.connection_loss = false;
2472 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2474 EXPORT_SYMBOL(ieee80211_beacon_loss);
2476 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2478 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2479 struct ieee80211_hw *hw = &sdata->local->hw;
2481 trace_api_connection_loss(sdata);
2483 sdata->u.mgd.connection_loss = true;
2484 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2486 EXPORT_SYMBOL(ieee80211_connection_loss);
2489 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2492 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2494 sdata_assert_lock(sdata);
2498 * we are not authenticated yet, the only timer that could be
2499 * running is the timeout for the authentication response which
2500 * which is not relevant anymore.
2502 del_timer_sync(&sdata->u.mgd.timer);
2503 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2505 eth_zero_addr(sdata->u.mgd.bssid);
2506 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2507 sdata->u.mgd.flags = 0;
2508 mutex_lock(&sdata->local->mtx);
2509 ieee80211_vif_release_channel(sdata);
2510 mutex_unlock(&sdata->local->mtx);
2513 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2515 sdata->u.mgd.auth_data = NULL;
2518 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2519 bool assoc, bool abandon)
2521 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2523 sdata_assert_lock(sdata);
2527 * we are not associated yet, the only timer that could be
2528 * running is the timeout for the association response which
2529 * which is not relevant anymore.
2531 del_timer_sync(&sdata->u.mgd.timer);
2532 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2534 eth_zero_addr(sdata->u.mgd.bssid);
2535 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2536 sdata->u.mgd.flags = 0;
2537 sdata->vif.mu_mimo_owner = false;
2539 mutex_lock(&sdata->local->mtx);
2540 ieee80211_vif_release_channel(sdata);
2541 mutex_unlock(&sdata->local->mtx);
2544 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2548 sdata->u.mgd.assoc_data = NULL;
2551 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2552 struct ieee80211_mgmt *mgmt, size_t len)
2554 struct ieee80211_local *local = sdata->local;
2555 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2557 struct ieee802_11_elems elems;
2560 pos = mgmt->u.auth.variable;
2561 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2562 if (!elems.challenge)
2564 auth_data->expected_transaction = 4;
2565 drv_mgd_prepare_tx(sdata->local, sdata);
2566 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2567 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2568 IEEE80211_TX_INTFL_MLME_CONN_TX;
2569 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2570 elems.challenge - 2, elems.challenge_len + 2,
2571 auth_data->bss->bssid, auth_data->bss->bssid,
2572 auth_data->key, auth_data->key_len,
2573 auth_data->key_idx, tx_flags);
2576 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2577 struct ieee80211_mgmt *mgmt, size_t len)
2579 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2581 u16 auth_alg, auth_transaction, status_code;
2582 struct sta_info *sta;
2583 struct ieee80211_event event = {
2585 .u.mlme.data = AUTH_EVENT,
2588 sdata_assert_lock(sdata);
2593 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2596 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2598 if (!ether_addr_equal(bssid, mgmt->bssid))
2601 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2602 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2603 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2605 if (auth_alg != ifmgd->auth_data->algorithm ||
2606 auth_transaction != ifmgd->auth_data->expected_transaction) {
2607 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2608 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2610 ifmgd->auth_data->expected_transaction);
2614 if (status_code != WLAN_STATUS_SUCCESS) {
2615 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2616 mgmt->sa, status_code);
2617 ieee80211_destroy_auth_data(sdata, false);
2618 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2619 event.u.mlme.status = MLME_DENIED;
2620 event.u.mlme.reason = status_code;
2621 drv_event_callback(sdata->local, sdata, &event);
2625 switch (ifmgd->auth_data->algorithm) {
2626 case WLAN_AUTH_OPEN:
2627 case WLAN_AUTH_LEAP:
2630 case WLAN_AUTH_FILS_SK:
2631 case WLAN_AUTH_FILS_SK_PFS:
2632 case WLAN_AUTH_FILS_PK:
2634 case WLAN_AUTH_SHARED_KEY:
2635 if (ifmgd->auth_data->expected_transaction != 4) {
2636 ieee80211_auth_challenge(sdata, mgmt, len);
2637 /* need another frame */
2642 WARN_ONCE(1, "invalid auth alg %d",
2643 ifmgd->auth_data->algorithm);
2647 event.u.mlme.status = MLME_SUCCESS;
2648 drv_event_callback(sdata->local, sdata, &event);
2649 sdata_info(sdata, "authenticated\n");
2650 ifmgd->auth_data->done = true;
2651 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2652 ifmgd->auth_data->timeout_started = true;
2653 run_again(sdata, ifmgd->auth_data->timeout);
2655 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2656 ifmgd->auth_data->expected_transaction != 2) {
2658 * Report auth frame to user space for processing since another
2659 * round of Authentication frames is still needed.
2661 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2665 /* move station state to auth */
2666 mutex_lock(&sdata->local->sta_mtx);
2667 sta = sta_info_get(sdata, bssid);
2669 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2672 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2673 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2676 mutex_unlock(&sdata->local->sta_mtx);
2678 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2681 mutex_unlock(&sdata->local->sta_mtx);
2682 /* ignore frame -- wait for timeout */
2685 #define case_WLAN(type) \
2686 case WLAN_REASON_##type: return #type
2688 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2690 switch (reason_code) {
2691 case_WLAN(UNSPECIFIED);
2692 case_WLAN(PREV_AUTH_NOT_VALID);
2693 case_WLAN(DEAUTH_LEAVING);
2694 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2695 case_WLAN(DISASSOC_AP_BUSY);
2696 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2697 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2698 case_WLAN(DISASSOC_STA_HAS_LEFT);
2699 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2700 case_WLAN(DISASSOC_BAD_POWER);
2701 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2702 case_WLAN(INVALID_IE);
2703 case_WLAN(MIC_FAILURE);
2704 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2705 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2706 case_WLAN(IE_DIFFERENT);
2707 case_WLAN(INVALID_GROUP_CIPHER);
2708 case_WLAN(INVALID_PAIRWISE_CIPHER);
2709 case_WLAN(INVALID_AKMP);
2710 case_WLAN(UNSUPP_RSN_VERSION);
2711 case_WLAN(INVALID_RSN_IE_CAP);
2712 case_WLAN(IEEE8021X_FAILED);
2713 case_WLAN(CIPHER_SUITE_REJECTED);
2714 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2715 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2716 case_WLAN(DISASSOC_LOW_ACK);
2717 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2718 case_WLAN(QSTA_LEAVE_QBSS);
2719 case_WLAN(QSTA_NOT_USE);
2720 case_WLAN(QSTA_REQUIRE_SETUP);
2721 case_WLAN(QSTA_TIMEOUT);
2722 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2723 case_WLAN(MESH_PEER_CANCELED);
2724 case_WLAN(MESH_MAX_PEERS);
2725 case_WLAN(MESH_CONFIG);
2726 case_WLAN(MESH_CLOSE);
2727 case_WLAN(MESH_MAX_RETRIES);
2728 case_WLAN(MESH_CONFIRM_TIMEOUT);
2729 case_WLAN(MESH_INVALID_GTK);
2730 case_WLAN(MESH_INCONSISTENT_PARAM);
2731 case_WLAN(MESH_INVALID_SECURITY);
2732 case_WLAN(MESH_PATH_ERROR);
2733 case_WLAN(MESH_PATH_NOFORWARD);
2734 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2735 case_WLAN(MAC_EXISTS_IN_MBSS);
2736 case_WLAN(MESH_CHAN_REGULATORY);
2737 case_WLAN(MESH_CHAN);
2738 default: return "<unknown>";
2742 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2743 struct ieee80211_mgmt *mgmt, size_t len)
2745 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2746 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2748 sdata_assert_lock(sdata);
2753 if (ifmgd->associated &&
2754 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2755 const u8 *bssid = ifmgd->associated->bssid;
2757 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2759 ieee80211_get_reason_code_string(reason_code));
2761 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2763 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2768 if (ifmgd->assoc_data &&
2769 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2770 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2773 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2775 ieee80211_get_reason_code_string(reason_code));
2777 ieee80211_destroy_assoc_data(sdata, false, true);
2779 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2785 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2786 struct ieee80211_mgmt *mgmt, size_t len)
2788 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2791 sdata_assert_lock(sdata);
2796 if (!ifmgd->associated ||
2797 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2800 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2802 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2803 mgmt->sa, reason_code,
2804 ieee80211_get_reason_code_string(reason_code));
2806 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2808 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2811 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2812 u8 *supp_rates, unsigned int supp_rates_len,
2813 u32 *rates, u32 *basic_rates,
2814 bool *have_higher_than_11mbit,
2815 int *min_rate, int *min_rate_index,
2816 int shift, u32 rate_flags)
2820 for (i = 0; i < supp_rates_len; i++) {
2821 int rate = supp_rates[i] & 0x7f;
2822 bool is_basic = !!(supp_rates[i] & 0x80);
2824 if ((rate * 5 * (1 << shift)) > 110)
2825 *have_higher_than_11mbit = true;
2828 * Skip HT and VHT BSS membership selectors since they're not
2831 * Note: Even though the membership selector and the basic
2832 * rate flag share the same bit, they are not exactly
2835 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2836 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2839 for (j = 0; j < sband->n_bitrates; j++) {
2840 struct ieee80211_rate *br;
2843 br = &sband->bitrates[j];
2844 if ((rate_flags & br->flags) != rate_flags)
2847 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2848 if (brate == rate) {
2851 *basic_rates |= BIT(j);
2852 if ((rate * 5) < *min_rate) {
2853 *min_rate = rate * 5;
2854 *min_rate_index = j;
2862 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2863 struct cfg80211_bss *cbss,
2864 struct ieee80211_mgmt *mgmt, size_t len)
2866 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2867 struct ieee80211_local *local = sdata->local;
2868 struct ieee80211_supported_band *sband;
2869 struct sta_info *sta;
2871 u16 capab_info, aid;
2872 struct ieee802_11_elems elems;
2873 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2874 const struct cfg80211_bss_ies *bss_ies = NULL;
2875 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2880 /* AssocResp and ReassocResp have identical structure */
2882 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2883 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2885 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2886 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2888 aid &= ~(BIT(15) | BIT(14));
2890 ifmgd->broken_ap = false;
2892 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2893 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2896 ifmgd->broken_ap = true;
2899 pos = mgmt->u.assoc_resp.variable;
2900 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2902 if (!elems.supp_rates) {
2903 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2908 ifmgd->tdls_chan_switch_prohibited =
2909 elems.ext_capab && elems.ext_capab_len >= 5 &&
2910 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2913 * Some APs are erroneously not including some information in their
2914 * (re)association response frames. Try to recover by using the data
2915 * from the beacon or probe response. This seems to afflict mobile
2916 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2917 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2919 if ((assoc_data->wmm && !elems.wmm_param) ||
2920 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2921 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2922 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2923 (!elems.vht_cap_elem || !elems.vht_operation))) {
2924 const struct cfg80211_bss_ies *ies;
2925 struct ieee802_11_elems bss_elems;
2928 ies = rcu_dereference(cbss->ies);
2930 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2936 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2938 if (assoc_data->wmm &&
2939 !elems.wmm_param && bss_elems.wmm_param) {
2940 elems.wmm_param = bss_elems.wmm_param;
2942 "AP bug: WMM param missing from AssocResp\n");
2946 * Also check if we requested HT/VHT, otherwise the AP doesn't
2947 * have to include the IEs in the (re)association response.
2949 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2950 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2951 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2953 "AP bug: HT capability missing from AssocResp\n");
2955 if (!elems.ht_operation && bss_elems.ht_operation &&
2956 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2957 elems.ht_operation = bss_elems.ht_operation;
2959 "AP bug: HT operation missing from AssocResp\n");
2961 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2962 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2963 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2965 "AP bug: VHT capa missing from AssocResp\n");
2967 if (!elems.vht_operation && bss_elems.vht_operation &&
2968 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2969 elems.vht_operation = bss_elems.vht_operation;
2971 "AP bug: VHT operation missing from AssocResp\n");
2976 * We previously checked these in the beacon/probe response, so
2977 * they should be present here. This is just a safety net.
2979 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2980 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2982 "HT AP is missing WMM params or HT capability/operation\n");
2987 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2988 (!elems.vht_cap_elem || !elems.vht_operation)) {
2990 "VHT AP is missing VHT capability/operation\n");
2995 mutex_lock(&sdata->local->sta_mtx);
2997 * station info was already allocated and inserted before
2998 * the association and should be available to us
3000 sta = sta_info_get(sdata, cbss->bssid);
3001 if (WARN_ON(!sta)) {
3002 mutex_unlock(&sdata->local->sta_mtx);
3007 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3009 /* Set up internal HT/VHT capabilities */
3010 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3011 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3012 elems.ht_cap_elem, sta);
3014 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3015 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3016 elems.vht_cap_elem, sta);
3019 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3020 * in their association response, so ignore that data for our own
3021 * configuration. If it changed since the last beacon, we'll get the
3022 * next beacon and update then.
3026 * If an operating mode notification IE is present, override the
3027 * NSS calculation (that would be done in rate_control_rate_init())
3028 * and use the # of streams from that element.
3030 if (elems.opmode_notif &&
3031 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3034 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3035 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3037 sta->sta.rx_nss = nss;
3040 rate_control_rate_init(sta);
3042 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3043 set_sta_flag(sta, WLAN_STA_MFP);
3044 sta->sta.mfp = true;
3046 sta->sta.mfp = false;
3049 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3051 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3052 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3053 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3056 "failed to move station %pM to desired state\n",
3058 WARN_ON(__sta_info_destroy(sta));
3059 mutex_unlock(&sdata->local->sta_mtx);
3064 mutex_unlock(&sdata->local->sta_mtx);
3067 * Always handle WMM once after association regardless
3068 * of the first value the AP uses. Setting -1 here has
3069 * that effect because the AP values is an unsigned
3072 ifmgd->wmm_last_param_set = -1;
3074 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3075 ieee80211_set_wmm_default(sdata, false, false);
3076 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3077 elems.wmm_param_len)) {
3078 /* still enable QoS since we might have HT/VHT */
3079 ieee80211_set_wmm_default(sdata, false, true);
3080 /* set the disable-WMM flag in this case to disable
3081 * tracking WMM parameter changes in the beacon if
3082 * the parameters weren't actually valid. Doing so
3083 * avoids changing parameters very strangely when
3084 * the AP is going back and forth between valid and
3085 * invalid parameters.
3087 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3089 changed |= BSS_CHANGED_QOS;
3091 /* set AID and assoc capability,
3092 * ieee80211_set_associated() will tell the driver */
3093 bss_conf->aid = aid;
3094 bss_conf->assoc_capability = capab_info;
3095 ieee80211_set_associated(sdata, cbss, changed);
3098 * If we're using 4-addr mode, let the AP know that we're
3099 * doing so, so that it can create the STA VLAN on its side
3101 if (ifmgd->use_4addr)
3102 ieee80211_send_4addr_nullfunc(local, sdata);
3105 * Start timer to probe the connection to the AP now.
3106 * Also start the timer that will detect beacon loss.
3108 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3109 ieee80211_sta_reset_beacon_monitor(sdata);
3117 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3118 struct ieee80211_mgmt *mgmt,
3121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3122 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3123 u16 capab_info, status_code, aid;
3124 struct ieee802_11_elems elems;
3125 int ac, uapsd_queues = -1;
3128 struct cfg80211_bss *bss;
3129 struct ieee80211_event event = {
3131 .u.mlme.data = ASSOC_EVENT,
3134 sdata_assert_lock(sdata);
3138 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3142 * AssocResp and ReassocResp have identical structure, so process both
3143 * of them in this function.
3149 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3150 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3151 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3152 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3155 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3156 reassoc ? "Rea" : "A", mgmt->sa,
3157 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3159 if (assoc_data->fils_kek_len &&
3160 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3163 pos = mgmt->u.assoc_resp.variable;
3164 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3166 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3167 elems.timeout_int &&
3168 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3170 tu = le32_to_cpu(elems.timeout_int->value);
3171 ms = tu * 1024 / 1000;
3173 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3175 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3176 assoc_data->timeout_started = true;
3177 if (ms > IEEE80211_ASSOC_TIMEOUT)
3178 run_again(sdata, assoc_data->timeout);
3182 bss = assoc_data->bss;
3184 if (status_code != WLAN_STATUS_SUCCESS) {
3185 sdata_info(sdata, "%pM denied association (code=%d)\n",
3186 mgmt->sa, status_code);
3187 ieee80211_destroy_assoc_data(sdata, false, false);
3188 event.u.mlme.status = MLME_DENIED;
3189 event.u.mlme.reason = status_code;
3190 drv_event_callback(sdata->local, sdata, &event);
3192 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3193 /* oops -- internal error -- send timeout for now */
3194 ieee80211_destroy_assoc_data(sdata, false, false);
3195 cfg80211_assoc_timeout(sdata->dev, bss);
3198 event.u.mlme.status = MLME_SUCCESS;
3199 drv_event_callback(sdata->local, sdata, &event);
3200 sdata_info(sdata, "associated\n");
3203 * destroy assoc_data afterwards, as otherwise an idle
3204 * recalc after assoc_data is NULL but before associated
3205 * is set can cause the interface to go idle
3207 ieee80211_destroy_assoc_data(sdata, true, false);
3209 /* get uapsd queues configuration */
3211 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3212 if (sdata->tx_conf[ac].uapsd)
3213 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3216 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3219 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3220 struct ieee80211_mgmt *mgmt, size_t len,
3221 struct ieee80211_rx_status *rx_status,
3222 struct ieee802_11_elems *elems)
3224 struct ieee80211_local *local = sdata->local;
3225 struct ieee80211_bss *bss;
3226 struct ieee80211_channel *channel;
3228 sdata_assert_lock(sdata);
3230 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3234 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3237 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3238 ieee80211_rx_bss_put(local, bss);
3243 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3244 struct sk_buff *skb)
3246 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3247 struct ieee80211_if_managed *ifmgd;
3248 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3249 size_t baselen, len = skb->len;
3250 struct ieee802_11_elems elems;
3252 ifmgd = &sdata->u.mgd;
3254 sdata_assert_lock(sdata);
3256 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3257 return; /* ignore ProbeResp to foreign address */
3259 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3263 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3266 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3268 if (ifmgd->associated &&
3269 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3270 ieee80211_reset_ap_probe(sdata);
3274 * This is the canonical list of information elements we care about,
3275 * the filter code also gives us all changes to the Microsoft OUI
3276 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3277 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3278 * changes to requested client power.
3280 * We implement beacon filtering in software since that means we can
3281 * avoid processing the frame here and in cfg80211, and userspace
3282 * will not be able to tell whether the hardware supports it or not.
3284 * XXX: This list needs to be dynamic -- userspace needs to be able to
3285 * add items it requires. It also needs to be able to tell us to
3286 * look out for other vendor IEs.
3288 static const u64 care_about_ies =
3289 (1ULL << WLAN_EID_COUNTRY) |
3290 (1ULL << WLAN_EID_ERP_INFO) |
3291 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3292 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3293 (1ULL << WLAN_EID_HT_CAPABILITY) |
3294 (1ULL << WLAN_EID_HT_OPERATION) |
3295 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3297 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3298 struct ieee80211_mgmt *mgmt, size_t len,
3299 struct ieee80211_rx_status *rx_status)
3301 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3302 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3304 struct ieee802_11_elems elems;
3305 struct ieee80211_local *local = sdata->local;
3306 struct ieee80211_chanctx_conf *chanctx_conf;
3307 struct ieee80211_channel *chan;
3308 struct sta_info *sta;
3314 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3316 sdata_assert_lock(sdata);
3318 /* Process beacon from the current BSS */
3319 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3324 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3325 if (!chanctx_conf) {
3330 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3334 chan = chanctx_conf->def.chan;
3337 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3338 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3339 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3340 len - baselen, false, &elems);
3342 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3343 if (elems.tim && !elems.parse_error) {
3344 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3345 ifmgd->dtim_period = tim_ie->dtim_period;
3347 ifmgd->have_beacon = true;
3348 ifmgd->assoc_data->need_beacon = false;
3349 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3350 sdata->vif.bss_conf.sync_tsf =
3351 le64_to_cpu(mgmt->u.beacon.timestamp);
3352 sdata->vif.bss_conf.sync_device_ts =
3353 rx_status->device_timestamp;
3355 sdata->vif.bss_conf.sync_dtim_count =
3356 elems.tim->dtim_count;
3358 sdata->vif.bss_conf.sync_dtim_count = 0;
3360 /* continue assoc process */
3361 ifmgd->assoc_data->timeout = jiffies;
3362 ifmgd->assoc_data->timeout_started = true;
3363 run_again(sdata, ifmgd->assoc_data->timeout);
3367 if (!ifmgd->associated ||
3368 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3370 bssid = ifmgd->associated->bssid;
3372 /* Track average RSSI from the Beacon frames of the current AP */
3373 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3374 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3375 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3376 ifmgd->last_cqm_event_signal = 0;
3377 ifmgd->count_beacon_signal = 1;
3378 ifmgd->last_ave_beacon_signal = 0;
3380 ifmgd->count_beacon_signal++;
3383 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3385 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3386 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3387 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3388 int last_sig = ifmgd->last_ave_beacon_signal;
3389 struct ieee80211_event event = {
3394 * if signal crosses either of the boundaries, invoke callback
3395 * with appropriate parameters
3397 if (sig > ifmgd->rssi_max_thold &&
3398 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3399 ifmgd->last_ave_beacon_signal = sig;
3400 event.u.rssi.data = RSSI_EVENT_HIGH;
3401 drv_event_callback(local, sdata, &event);
3402 } else if (sig < ifmgd->rssi_min_thold &&
3403 (last_sig >= ifmgd->rssi_max_thold ||
3405 ifmgd->last_ave_beacon_signal = sig;
3406 event.u.rssi.data = RSSI_EVENT_LOW;
3407 drv_event_callback(local, sdata, &event);
3411 if (bss_conf->cqm_rssi_thold &&
3412 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3413 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3414 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3415 int last_event = ifmgd->last_cqm_event_signal;
3416 int thold = bss_conf->cqm_rssi_thold;
3417 int hyst = bss_conf->cqm_rssi_hyst;
3420 (last_event == 0 || sig < last_event - hyst)) {
3421 ifmgd->last_cqm_event_signal = sig;
3422 ieee80211_cqm_rssi_notify(
3424 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3426 } else if (sig > thold &&
3427 (last_event == 0 || sig > last_event + hyst)) {
3428 ifmgd->last_cqm_event_signal = sig;
3429 ieee80211_cqm_rssi_notify(
3431 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3436 if (bss_conf->cqm_rssi_low &&
3437 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3438 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3439 int last_event = ifmgd->last_cqm_event_signal;
3440 int low = bss_conf->cqm_rssi_low;
3441 int high = bss_conf->cqm_rssi_high;
3444 (last_event == 0 || last_event >= low)) {
3445 ifmgd->last_cqm_event_signal = sig;
3446 ieee80211_cqm_rssi_notify(
3448 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3450 } else if (sig > high &&
3451 (last_event == 0 || last_event <= high)) {
3452 ifmgd->last_cqm_event_signal = sig;
3453 ieee80211_cqm_rssi_notify(
3455 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3460 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3461 mlme_dbg_ratelimited(sdata,
3462 "cancelling AP probe due to a received beacon\n");
3463 ieee80211_reset_ap_probe(sdata);
3467 * Push the beacon loss detection into the future since
3468 * we are processing a beacon from the AP just now.
3470 ieee80211_sta_reset_beacon_monitor(sdata);
3472 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3473 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3474 len - baselen, false, &elems,
3475 care_about_ies, ncrc);
3477 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3478 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3479 if (local->hw.conf.dynamic_ps_timeout > 0) {
3480 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3481 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3482 ieee80211_hw_config(local,
3483 IEEE80211_CONF_CHANGE_PS);
3485 ieee80211_send_nullfunc(local, sdata, false);
3486 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3487 local->pspolling = true;
3490 * Here is assumed that the driver will be
3491 * able to send ps-poll frame and receive a
3492 * response even though power save mode is
3493 * enabled, but some drivers might require
3494 * to disable power save here. This needs
3495 * to be investigated.
3497 ieee80211_send_pspoll(local, sdata);
3501 if (sdata->vif.p2p ||
3502 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3503 struct ieee80211_p2p_noa_attr noa = {};
3506 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3508 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3509 (u8 *) &noa, sizeof(noa));
3511 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3512 /* valid noa_attr and index changed */
3513 sdata->u.mgd.p2p_noa_index = noa.index;
3514 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3515 changed |= BSS_CHANGED_P2P_PS;
3517 * make sure we update all information, the CRC
3518 * mechanism doesn't look at P2P attributes.
3520 ifmgd->beacon_crc_valid = false;
3522 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3523 /* noa_attr not found and we had valid noa_attr before */
3524 sdata->u.mgd.p2p_noa_index = -1;
3525 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3526 changed |= BSS_CHANGED_P2P_PS;
3527 ifmgd->beacon_crc_valid = false;
3531 if (ifmgd->csa_waiting_bcn)
3532 ieee80211_chswitch_post_beacon(sdata);
3535 * Update beacon timing and dtim count on every beacon appearance. This
3536 * will allow the driver to use the most updated values. Do it before
3537 * comparing this one with last received beacon.
3538 * IMPORTANT: These parameters would possibly be out of sync by the time
3539 * the driver will use them. The synchronized view is currently
3540 * guaranteed only in certain callbacks.
3542 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3543 sdata->vif.bss_conf.sync_tsf =
3544 le64_to_cpu(mgmt->u.beacon.timestamp);
3545 sdata->vif.bss_conf.sync_device_ts =
3546 rx_status->device_timestamp;
3548 sdata->vif.bss_conf.sync_dtim_count =
3549 elems.tim->dtim_count;
3551 sdata->vif.bss_conf.sync_dtim_count = 0;
3554 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3556 ifmgd->beacon_crc = ncrc;
3557 ifmgd->beacon_crc_valid = true;
3559 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3561 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3562 rx_status->device_timestamp,
3565 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3566 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3567 elems.wmm_param_len))
3568 changed |= BSS_CHANGED_QOS;
3571 * If we haven't had a beacon before, tell the driver about the
3572 * DTIM period (and beacon timing if desired) now.
3574 if (!ifmgd->have_beacon) {
3575 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3577 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3579 bss_conf->dtim_period = 1;
3581 changed |= BSS_CHANGED_BEACON_INFO;
3582 ifmgd->have_beacon = true;
3584 mutex_lock(&local->iflist_mtx);
3585 ieee80211_recalc_ps(local);
3586 mutex_unlock(&local->iflist_mtx);
3588 ieee80211_recalc_ps_vif(sdata);
3591 if (elems.erp_info) {
3593 erp_value = elems.erp_info[0];
3597 changed |= ieee80211_handle_bss_capability(sdata,
3598 le16_to_cpu(mgmt->u.beacon.capab_info),
3599 erp_valid, erp_value);
3601 mutex_lock(&local->sta_mtx);
3602 sta = sta_info_get(sdata, bssid);
3604 if (ieee80211_config_bw(sdata, sta,
3605 elems.ht_cap_elem, elems.ht_operation,
3606 elems.vht_operation, bssid, &changed)) {
3607 mutex_unlock(&local->sta_mtx);
3609 "failed to follow AP %pM bandwidth change, disconnect\n",
3611 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3612 WLAN_REASON_DEAUTH_LEAVING,
3614 ieee80211_report_disconnect(sdata, deauth_buf,
3615 sizeof(deauth_buf), true,
3616 WLAN_REASON_DEAUTH_LEAVING);
3620 if (sta && elems.opmode_notif)
3621 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3623 mutex_unlock(&local->sta_mtx);
3625 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3627 elems.country_elem_len,
3628 elems.pwr_constr_elem,
3629 elems.cisco_dtpc_elem);
3631 ieee80211_bss_info_change_notify(sdata, changed);
3634 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3635 struct sk_buff *skb)
3637 struct ieee80211_rx_status *rx_status;
3638 struct ieee80211_mgmt *mgmt;
3640 struct ieee802_11_elems elems;
3643 rx_status = (struct ieee80211_rx_status *) skb->cb;
3644 mgmt = (struct ieee80211_mgmt *) skb->data;
3645 fc = le16_to_cpu(mgmt->frame_control);
3649 switch (fc & IEEE80211_FCTL_STYPE) {
3650 case IEEE80211_STYPE_BEACON:
3651 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3653 case IEEE80211_STYPE_PROBE_RESP:
3654 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3656 case IEEE80211_STYPE_AUTH:
3657 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3659 case IEEE80211_STYPE_DEAUTH:
3660 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3662 case IEEE80211_STYPE_DISASSOC:
3663 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3665 case IEEE80211_STYPE_ASSOC_RESP:
3666 case IEEE80211_STYPE_REASSOC_RESP:
3667 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3669 case IEEE80211_STYPE_ACTION:
3670 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3671 ies_len = skb->len -
3672 offsetof(struct ieee80211_mgmt,
3673 u.action.u.chan_switch.variable);
3678 ieee802_11_parse_elems(
3679 mgmt->u.action.u.chan_switch.variable,
3680 ies_len, true, &elems);
3682 if (elems.parse_error)
3685 ieee80211_sta_process_chanswitch(sdata,
3687 rx_status->device_timestamp,
3689 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3690 ies_len = skb->len -
3691 offsetof(struct ieee80211_mgmt,
3692 u.action.u.ext_chan_switch.variable);
3697 ieee802_11_parse_elems(
3698 mgmt->u.action.u.ext_chan_switch.variable,
3699 ies_len, true, &elems);
3701 if (elems.parse_error)
3704 /* for the handling code pretend this was also an IE */
3705 elems.ext_chansw_ie =
3706 &mgmt->u.action.u.ext_chan_switch.data;
3708 ieee80211_sta_process_chanswitch(sdata,
3710 rx_status->device_timestamp,
3715 sdata_unlock(sdata);
3718 static void ieee80211_sta_timer(unsigned long data)
3720 struct ieee80211_sub_if_data *sdata =
3721 (struct ieee80211_sub_if_data *) data;
3723 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3726 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3727 u8 *bssid, u8 reason, bool tx)
3729 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3731 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3734 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3738 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3740 struct ieee80211_local *local = sdata->local;
3741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3742 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3747 sdata_assert_lock(sdata);
3749 if (WARN_ON_ONCE(!auth_data))
3754 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3755 sdata_info(sdata, "authentication with %pM timed out\n",
3756 auth_data->bss->bssid);
3759 * Most likely AP is not in the range so remove the
3760 * bss struct for that AP.
3762 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3767 drv_mgd_prepare_tx(local, sdata);
3769 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3770 auth_data->bss->bssid, auth_data->tries,
3771 IEEE80211_AUTH_MAX_TRIES);
3773 auth_data->expected_transaction = 2;
3775 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3776 trans = auth_data->sae_trans;
3777 status = auth_data->sae_status;
3778 auth_data->expected_transaction = trans;
3781 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3782 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3783 IEEE80211_TX_INTFL_MLME_CONN_TX;
3785 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3786 auth_data->data, auth_data->data_len,
3787 auth_data->bss->bssid,
3788 auth_data->bss->bssid, NULL, 0, 0,
3791 if (tx_flags == 0) {
3792 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3793 auth_data->timeout_started = true;
3794 run_again(sdata, auth_data->timeout);
3796 auth_data->timeout =
3797 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3798 auth_data->timeout_started = true;
3799 run_again(sdata, auth_data->timeout);
3805 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3807 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3808 struct ieee80211_local *local = sdata->local;
3810 sdata_assert_lock(sdata);
3812 assoc_data->tries++;
3813 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3814 sdata_info(sdata, "association with %pM timed out\n",
3815 assoc_data->bss->bssid);
3818 * Most likely AP is not in the range so remove the
3819 * bss struct for that AP.
3821 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3826 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3827 assoc_data->bss->bssid, assoc_data->tries,
3828 IEEE80211_ASSOC_MAX_TRIES);
3829 ieee80211_send_assoc(sdata);
3831 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3832 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3833 assoc_data->timeout_started = true;
3834 run_again(sdata, assoc_data->timeout);
3836 assoc_data->timeout =
3837 round_jiffies_up(jiffies +
3838 IEEE80211_ASSOC_TIMEOUT_LONG);
3839 assoc_data->timeout_started = true;
3840 run_again(sdata, assoc_data->timeout);
3846 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3847 __le16 fc, bool acked)
3849 struct ieee80211_local *local = sdata->local;
3851 sdata->u.mgd.status_fc = fc;
3852 sdata->u.mgd.status_acked = acked;
3853 sdata->u.mgd.status_received = true;
3855 ieee80211_queue_work(&local->hw, &sdata->work);
3858 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3860 struct ieee80211_local *local = sdata->local;
3861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3865 if (ifmgd->status_received) {
3866 __le16 fc = ifmgd->status_fc;
3867 bool status_acked = ifmgd->status_acked;
3869 ifmgd->status_received = false;
3870 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3872 ifmgd->auth_data->timeout =
3873 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3874 run_again(sdata, ifmgd->auth_data->timeout);
3876 ifmgd->auth_data->timeout = jiffies - 1;
3878 ifmgd->auth_data->timeout_started = true;
3879 } else if (ifmgd->assoc_data &&
3880 (ieee80211_is_assoc_req(fc) ||
3881 ieee80211_is_reassoc_req(fc))) {
3883 ifmgd->assoc_data->timeout =
3884 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3885 run_again(sdata, ifmgd->assoc_data->timeout);
3887 ifmgd->assoc_data->timeout = jiffies - 1;
3889 ifmgd->assoc_data->timeout_started = true;
3893 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3894 time_after(jiffies, ifmgd->auth_data->timeout)) {
3895 if (ifmgd->auth_data->done) {
3897 * ok ... we waited for assoc but userspace didn't,
3898 * so let's just kill the auth data
3900 ieee80211_destroy_auth_data(sdata, false);
3901 } else if (ieee80211_auth(sdata)) {
3903 struct ieee80211_event event = {
3905 .u.mlme.data = AUTH_EVENT,
3906 .u.mlme.status = MLME_TIMEOUT,
3909 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3911 ieee80211_destroy_auth_data(sdata, false);
3913 cfg80211_auth_timeout(sdata->dev, bssid);
3914 drv_event_callback(sdata->local, sdata, &event);
3916 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3917 run_again(sdata, ifmgd->auth_data->timeout);
3919 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3920 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3921 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3922 ieee80211_do_assoc(sdata)) {
3923 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3924 struct ieee80211_event event = {
3926 .u.mlme.data = ASSOC_EVENT,
3927 .u.mlme.status = MLME_TIMEOUT,
3930 ieee80211_destroy_assoc_data(sdata, false, false);
3931 cfg80211_assoc_timeout(sdata->dev, bss);
3932 drv_event_callback(sdata->local, sdata, &event);
3934 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3935 run_again(sdata, ifmgd->assoc_data->timeout);
3937 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3938 ifmgd->associated) {
3942 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3944 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3945 max_tries = max_nullfunc_tries;
3947 max_tries = max_probe_tries;
3949 /* ACK received for nullfunc probing frame */
3950 if (!ifmgd->probe_send_count)
3951 ieee80211_reset_ap_probe(sdata);
3952 else if (ifmgd->nullfunc_failed) {
3953 if (ifmgd->probe_send_count < max_tries) {
3955 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3956 bssid, ifmgd->probe_send_count,
3958 ieee80211_mgd_probe_ap_send(sdata);
3961 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3963 ieee80211_sta_connection_lost(sdata, bssid,
3964 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3967 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3968 run_again(sdata, ifmgd->probe_timeout);
3969 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3971 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3972 bssid, probe_wait_ms);
3973 ieee80211_sta_connection_lost(sdata, bssid,
3974 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3975 } else if (ifmgd->probe_send_count < max_tries) {
3977 "No probe response from AP %pM after %dms, try %d/%i\n",
3978 bssid, probe_wait_ms,
3979 ifmgd->probe_send_count, max_tries);
3980 ieee80211_mgd_probe_ap_send(sdata);
3983 * We actually lost the connection ... or did we?
3987 "No probe response from AP %pM after %dms, disconnecting.\n",
3988 bssid, probe_wait_ms);
3990 ieee80211_sta_connection_lost(sdata, bssid,
3991 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3995 sdata_unlock(sdata);
3998 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4000 struct ieee80211_sub_if_data *sdata =
4001 (struct ieee80211_sub_if_data *) data;
4002 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4004 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4007 sdata->u.mgd.connection_loss = false;
4008 ieee80211_queue_work(&sdata->local->hw,
4009 &sdata->u.mgd.beacon_connection_loss_work);
4012 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4014 struct ieee80211_sub_if_data *sdata =
4015 (struct ieee80211_sub_if_data *) data;
4016 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4017 struct ieee80211_local *local = sdata->local;
4019 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4022 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4025 static void ieee80211_sta_monitor_work(struct work_struct *work)
4027 struct ieee80211_sub_if_data *sdata =
4028 container_of(work, struct ieee80211_sub_if_data,
4029 u.mgd.monitor_work);
4031 ieee80211_mgd_probe_ap(sdata, false);
4034 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4036 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4037 __ieee80211_stop_poll(sdata);
4039 /* let's probe the connection once */
4040 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4041 ieee80211_queue_work(&sdata->local->hw,
4042 &sdata->u.mgd.monitor_work);
4047 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4049 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4050 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4054 if (ifmgd->auth_data || ifmgd->assoc_data) {
4055 const u8 *bssid = ifmgd->auth_data ?
4056 ifmgd->auth_data->bss->bssid :
4057 ifmgd->assoc_data->bss->bssid;
4060 * If we are trying to authenticate / associate while suspending,
4061 * cfg80211 won't know and won't actually abort those attempts,
4062 * thus we need to do that ourselves.
4064 ieee80211_send_deauth_disassoc(sdata, bssid,
4065 IEEE80211_STYPE_DEAUTH,
4066 WLAN_REASON_DEAUTH_LEAVING,
4068 if (ifmgd->assoc_data)
4069 ieee80211_destroy_assoc_data(sdata, false, true);
4070 if (ifmgd->auth_data)
4071 ieee80211_destroy_auth_data(sdata, false);
4072 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4073 IEEE80211_DEAUTH_FRAME_LEN);
4076 /* This is a bit of a hack - we should find a better and more generic
4077 * solution to this. Normally when suspending, cfg80211 will in fact
4078 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4079 * auth (not so important) or assoc (this is the problem) process.
4081 * As a consequence, it can happen that we are in the process of both
4082 * associating and suspending, and receive an association response
4083 * after cfg80211 has checked if it needs to disconnect, but before
4084 * we actually set the flag to drop incoming frames. This will then
4085 * cause the workqueue flush to process the association response in
4086 * the suspend, resulting in a successful association just before it
4087 * tries to remove the interface from the driver, which now though
4088 * has a channel context assigned ... this results in issues.
4090 * To work around this (for now) simply deauth here again if we're
4093 if (ifmgd->associated && !sdata->local->wowlan) {
4095 struct cfg80211_deauth_request req = {
4096 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4100 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4101 ieee80211_mgd_deauth(sdata, &req);
4104 sdata_unlock(sdata);
4107 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4112 if (!ifmgd->associated) {
4113 sdata_unlock(sdata);
4117 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4118 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4119 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4120 ieee80211_sta_connection_lost(sdata,
4121 ifmgd->associated->bssid,
4122 WLAN_REASON_UNSPECIFIED,
4124 sdata_unlock(sdata);
4127 sdata_unlock(sdata);
4131 /* interface setup */
4132 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4134 struct ieee80211_if_managed *ifmgd;
4136 ifmgd = &sdata->u.mgd;
4137 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4138 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4139 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4140 ieee80211_beacon_connection_loss_work);
4141 INIT_WORK(&ifmgd->csa_connection_drop_work,
4142 ieee80211_csa_connection_drop_work);
4143 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4144 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4145 ieee80211_tdls_peer_del_work);
4146 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4147 (unsigned long) sdata);
4148 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4149 (unsigned long) sdata);
4150 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4151 (unsigned long) sdata);
4152 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4153 (unsigned long) sdata);
4154 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4155 ieee80211_sta_handle_tspec_ac_params_wk);
4158 ifmgd->powersave = sdata->wdev.ps;
4159 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4160 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4161 ifmgd->p2p_noa_index = -1;
4163 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4164 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4166 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4168 /* Setup TDLS data */
4169 spin_lock_init(&ifmgd->teardown_lock);
4170 ifmgd->teardown_skb = NULL;
4171 ifmgd->orig_teardown_skb = NULL;
4174 /* scan finished notification */
4175 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4177 struct ieee80211_sub_if_data *sdata;
4179 /* Restart STA timers */
4181 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4182 if (ieee80211_sdata_running(sdata))
4183 ieee80211_restart_sta_timer(sdata);
4188 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4189 struct cfg80211_bss *cbss)
4191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4192 const u8 *ht_cap_ie, *vht_cap_ie;
4193 const struct ieee80211_ht_cap *ht_cap;
4194 const struct ieee80211_vht_cap *vht_cap;
4197 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4200 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4201 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4202 ht_cap = (void *)(ht_cap_ie + 2);
4203 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4205 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4206 * "Tx Unequal Modulation Supported" fields.
4210 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4213 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4214 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4218 vht_cap = (void *)(vht_cap_ie + 2);
4219 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4220 for (nss = 8; nss > 0; nss--) {
4221 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4222 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4225 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4226 chains = max(chains, nss);
4232 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4233 struct cfg80211_bss *cbss)
4235 struct ieee80211_local *local = sdata->local;
4236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4237 const struct ieee80211_ht_cap *ht_cap = NULL;
4238 const struct ieee80211_ht_operation *ht_oper = NULL;
4239 const struct ieee80211_vht_operation *vht_oper = NULL;
4240 struct ieee80211_supported_band *sband;
4241 struct cfg80211_chan_def chandef;
4246 sband = local->hw.wiphy->bands[cbss->channel->band];
4248 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4249 IEEE80211_STA_DISABLE_80P80MHZ |
4250 IEEE80211_STA_DISABLE_160MHZ);
4254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4255 sband->ht_cap.ht_supported) {
4256 const u8 *ht_oper_ie, *ht_cap_ie;
4258 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4259 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4260 ht_oper = (void *)(ht_oper_ie + 2);
4262 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4263 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4264 ht_cap = (void *)(ht_cap_ie + 2);
4267 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4272 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4273 sband->vht_cap.vht_supported) {
4274 const u8 *vht_oper_ie, *vht_cap;
4276 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4277 WLAN_EID_VHT_OPERATION);
4278 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4279 vht_oper = (void *)(vht_oper_ie + 2);
4280 if (vht_oper && !ht_oper) {
4283 "AP advertised VHT without HT, disabling both\n");
4284 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4285 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4288 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4289 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4290 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4295 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4297 for (i = 0; i < sband->n_channels; i++) {
4298 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4299 IEEE80211_CHAN_NO_80MHZ))
4307 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4309 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4311 ht_cap, ht_oper, vht_oper,
4314 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4319 /* will change later if needed */
4320 sdata->smps_mode = IEEE80211_SMPS_OFF;
4322 mutex_lock(&local->mtx);
4324 * If this fails (possibly due to channel context sharing
4325 * on incompatible channels, e.g. 80+80 and 160 sharing the
4326 * same control channel) try to use a smaller bandwidth.
4328 ret = ieee80211_vif_use_channel(sdata, &chandef,
4329 IEEE80211_CHANCTX_SHARED);
4331 /* don't downgrade for 5 and 10 MHz channels, though. */
4332 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4333 chandef.width == NL80211_CHAN_WIDTH_10)
4336 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4337 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4338 ret = ieee80211_vif_use_channel(sdata, &chandef,
4339 IEEE80211_CHANCTX_SHARED);
4342 mutex_unlock(&local->mtx);
4346 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4347 struct cfg80211_bss *cbss, bool assoc,
4350 struct ieee80211_local *local = sdata->local;
4351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4352 struct ieee80211_bss *bss = (void *)cbss->priv;
4353 struct sta_info *new_sta = NULL;
4354 struct ieee80211_supported_band *sband;
4355 bool have_sta = false;
4358 sband = local->hw.wiphy->bands[cbss->channel->band];
4360 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4365 have_sta = sta_info_get(sdata, cbss->bssid);
4370 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4375 if (new_sta || override) {
4376 err = ieee80211_prep_channel(sdata, cbss);
4379 sta_info_free(local, new_sta);
4385 u32 rates = 0, basic_rates = 0;
4386 bool have_higher_than_11mbit;
4387 int min_rate = INT_MAX, min_rate_index = -1;
4388 struct ieee80211_chanctx_conf *chanctx_conf;
4389 const struct cfg80211_bss_ies *ies;
4390 int shift = ieee80211_vif_get_shift(&sdata->vif);
4394 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4395 if (WARN_ON(!chanctx_conf)) {
4397 sta_info_free(local, new_sta);
4400 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4403 ieee80211_get_rates(sband, bss->supp_rates,
4404 bss->supp_rates_len,
4405 &rates, &basic_rates,
4406 &have_higher_than_11mbit,
4407 &min_rate, &min_rate_index,
4411 * This used to be a workaround for basic rates missing
4412 * in the association response frame. Now that we no
4413 * longer use the basic rates from there, it probably
4414 * doesn't happen any more, but keep the workaround so
4415 * in case some *other* APs are buggy in different ways
4416 * we can connect -- with a warning.
4418 if (!basic_rates && min_rate_index >= 0) {
4420 "No basic rates, using min rate instead\n");
4421 basic_rates = BIT(min_rate_index);
4424 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4425 sdata->vif.bss_conf.basic_rates = basic_rates;
4427 /* cf. IEEE 802.11 9.2.12 */
4428 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4429 have_higher_than_11mbit)
4430 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4432 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4434 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4436 /* set timing information */
4437 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4439 ies = rcu_dereference(cbss->beacon_ies);
4443 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4444 sdata->vif.bss_conf.sync_device_ts =
4445 bss->device_ts_beacon;
4446 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4447 ies->data, ies->len);
4448 if (tim_ie && tim_ie[1] >= 2)
4449 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4451 sdata->vif.bss_conf.sync_dtim_count = 0;
4452 } else if (!ieee80211_hw_check(&sdata->local->hw,
4453 TIMING_BEACON_ONLY)) {
4454 ies = rcu_dereference(cbss->proberesp_ies);
4455 /* must be non-NULL since beacon IEs were NULL */
4456 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4457 sdata->vif.bss_conf.sync_device_ts =
4458 bss->device_ts_presp;
4459 sdata->vif.bss_conf.sync_dtim_count = 0;
4461 sdata->vif.bss_conf.sync_tsf = 0;
4462 sdata->vif.bss_conf.sync_device_ts = 0;
4463 sdata->vif.bss_conf.sync_dtim_count = 0;
4467 /* tell driver about BSSID, basic rates and timing */
4468 ieee80211_bss_info_change_notify(sdata,
4469 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4470 BSS_CHANGED_BEACON_INT);
4473 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4475 err = sta_info_insert(new_sta);
4479 "failed to insert STA entry for the AP (error %d)\n",
4484 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4486 /* Cancel scan to ensure that nothing interferes with connection */
4487 if (local->scanning)
4488 ieee80211_scan_cancel(local);
4494 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4495 struct cfg80211_auth_request *req)
4497 struct ieee80211_local *local = sdata->local;
4498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4499 struct ieee80211_mgd_auth_data *auth_data;
4503 /* prepare auth data structure */
4505 switch (req->auth_type) {
4506 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4507 auth_alg = WLAN_AUTH_OPEN;
4509 case NL80211_AUTHTYPE_SHARED_KEY:
4510 if (IS_ERR(local->wep_tx_tfm))
4512 auth_alg = WLAN_AUTH_SHARED_KEY;
4514 case NL80211_AUTHTYPE_FT:
4515 auth_alg = WLAN_AUTH_FT;
4517 case NL80211_AUTHTYPE_NETWORK_EAP:
4518 auth_alg = WLAN_AUTH_LEAP;
4520 case NL80211_AUTHTYPE_SAE:
4521 auth_alg = WLAN_AUTH_SAE;
4523 case NL80211_AUTHTYPE_FILS_SK:
4524 auth_alg = WLAN_AUTH_FILS_SK;
4526 case NL80211_AUTHTYPE_FILS_SK_PFS:
4527 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4529 case NL80211_AUTHTYPE_FILS_PK:
4530 auth_alg = WLAN_AUTH_FILS_PK;
4536 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4537 req->ie_len, GFP_KERNEL);
4541 auth_data->bss = req->bss;
4543 if (req->auth_data_len >= 4) {
4544 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4545 __le16 *pos = (__le16 *) req->auth_data;
4547 auth_data->sae_trans = le16_to_cpu(pos[0]);
4548 auth_data->sae_status = le16_to_cpu(pos[1]);
4550 memcpy(auth_data->data, req->auth_data + 4,
4551 req->auth_data_len - 4);
4552 auth_data->data_len += req->auth_data_len - 4;
4555 if (req->ie && req->ie_len) {
4556 memcpy(&auth_data->data[auth_data->data_len],
4557 req->ie, req->ie_len);
4558 auth_data->data_len += req->ie_len;
4561 if (req->key && req->key_len) {
4562 auth_data->key_len = req->key_len;
4563 auth_data->key_idx = req->key_idx;
4564 memcpy(auth_data->key, req->key, req->key_len);
4567 auth_data->algorithm = auth_alg;
4569 /* try to authenticate/probe */
4571 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4572 ifmgd->assoc_data) {
4577 if (ifmgd->auth_data)
4578 ieee80211_destroy_auth_data(sdata, false);
4580 /* prep auth_data so we don't go into idle on disassoc */
4581 ifmgd->auth_data = auth_data;
4583 if (ifmgd->associated) {
4584 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4587 "disconnect from AP %pM for new auth to %pM\n",
4588 ifmgd->associated->bssid, req->bss->bssid);
4589 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4590 WLAN_REASON_UNSPECIFIED,
4593 ieee80211_report_disconnect(sdata, frame_buf,
4594 sizeof(frame_buf), true,
4595 WLAN_REASON_UNSPECIFIED);
4598 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4600 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4604 err = ieee80211_auth(sdata);
4606 sta_info_destroy_addr(sdata, req->bss->bssid);
4610 /* hold our own reference */
4611 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4615 eth_zero_addr(ifmgd->bssid);
4616 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4617 ifmgd->auth_data = NULL;
4618 mutex_lock(&sdata->local->mtx);
4619 ieee80211_vif_release_channel(sdata);
4620 mutex_unlock(&sdata->local->mtx);
4626 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4627 struct cfg80211_assoc_request *req)
4629 struct ieee80211_local *local = sdata->local;
4630 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4631 struct ieee80211_bss *bss = (void *)req->bss->priv;
4632 struct ieee80211_mgd_assoc_data *assoc_data;
4633 const struct cfg80211_bss_ies *beacon_ies;
4634 struct ieee80211_supported_band *sband;
4635 const u8 *ssidie, *ht_ie, *vht_ie;
4637 bool override = false;
4639 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4644 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4650 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4651 assoc_data->ssid_len = ssidie[1];
4654 if (ifmgd->associated) {
4655 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4658 "disconnect from AP %pM for new assoc to %pM\n",
4659 ifmgd->associated->bssid, req->bss->bssid);
4660 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4661 WLAN_REASON_UNSPECIFIED,
4664 ieee80211_report_disconnect(sdata, frame_buf,
4665 sizeof(frame_buf), true,
4666 WLAN_REASON_UNSPECIFIED);
4669 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4674 if (ifmgd->assoc_data) {
4679 if (ifmgd->auth_data) {
4682 /* keep sta info, bssid if matching */
4683 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4684 ieee80211_destroy_auth_data(sdata, match);
4687 /* prepare assoc data */
4689 ifmgd->beacon_crc_valid = false;
4691 assoc_data->wmm = bss->wmm_used &&
4692 (local->hw.queues >= IEEE80211_NUM_ACS);
4695 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4696 * We still associate in non-HT mode (11a/b/g) if any one of these
4697 * ciphers is configured as pairwise.
4698 * We can set this to true for non-11n hardware, that'll be checked
4699 * separately along with the peer capabilities.
4701 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4702 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4703 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4704 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4705 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4706 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4707 netdev_info(sdata->dev,
4708 "disabling HT/VHT due to WEP/TKIP use\n");
4712 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4713 sband = local->hw.wiphy->bands[req->bss->channel->band];
4714 if (!sband->ht_cap.ht_supported ||
4715 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4716 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4717 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4718 if (!bss->wmm_used &&
4719 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4720 netdev_info(sdata->dev,
4721 "disabling HT as WMM/QoS is not supported by the AP\n");
4724 /* disable VHT if we don't support it or the AP doesn't use WMM */
4725 if (!sband->vht_cap.vht_supported ||
4726 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4727 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4728 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4729 if (!bss->wmm_used &&
4730 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4731 netdev_info(sdata->dev,
4732 "disabling VHT as WMM/QoS is not supported by the AP\n");
4735 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4736 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4737 sizeof(ifmgd->ht_capa_mask));
4739 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4740 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4741 sizeof(ifmgd->vht_capa_mask));
4743 if (req->ie && req->ie_len) {
4744 memcpy(assoc_data->ie, req->ie, req->ie_len);
4745 assoc_data->ie_len = req->ie_len;
4748 if (req->fils_kek) {
4749 /* should already be checked in cfg80211 - so warn */
4750 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4754 memcpy(assoc_data->fils_kek, req->fils_kek,
4756 assoc_data->fils_kek_len = req->fils_kek_len;
4759 if (req->fils_nonces)
4760 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4761 2 * FILS_NONCE_LEN);
4763 assoc_data->bss = req->bss;
4765 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4766 if (ifmgd->powersave)
4767 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4769 sdata->smps_mode = IEEE80211_SMPS_OFF;
4771 sdata->smps_mode = ifmgd->req_smps;
4773 assoc_data->capability = req->bss->capability;
4774 assoc_data->supp_rates = bss->supp_rates;
4775 assoc_data->supp_rates_len = bss->supp_rates_len;
4778 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4779 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4780 assoc_data->ap_ht_param =
4781 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4783 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4784 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4785 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4786 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4787 sizeof(struct ieee80211_vht_cap));
4789 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4792 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4793 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4794 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4795 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4797 if (bss->wmm_used && bss->uapsd_supported &&
4798 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4799 assoc_data->uapsd = true;
4800 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4802 assoc_data->uapsd = false;
4803 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4806 if (req->prev_bssid)
4807 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4810 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4811 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4813 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4814 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4817 if (req->flags & ASSOC_REQ_USE_RRM)
4818 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4820 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4822 if (req->crypto.control_port)
4823 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4825 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4827 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4828 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4829 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4832 /* kick off associate process */
4834 ifmgd->assoc_data = assoc_data;
4835 ifmgd->dtim_period = 0;
4836 ifmgd->have_beacon = false;
4838 /* override HT/VHT configuration only if the AP and we support it */
4839 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4840 struct ieee80211_sta_ht_cap sta_ht_cap;
4842 if (req->flags & ASSOC_REQ_DISABLE_HT)
4845 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4846 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4848 /* check for 40 MHz disable override */
4849 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4850 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4851 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4855 req->flags & ASSOC_REQ_DISABLE_VHT)
4859 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4860 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4861 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4864 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4865 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4867 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4872 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4874 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4877 * Wait up to one beacon interval ...
4878 * should this be more if we miss one?
4880 sdata_info(sdata, "waiting for beacon from %pM\n",
4882 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4883 assoc_data->timeout_started = true;
4884 assoc_data->need_beacon = true;
4885 } else if (beacon_ies) {
4886 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4891 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4892 const struct ieee80211_tim_ie *tim;
4893 tim = (void *)(tim_ie + 2);
4894 ifmgd->dtim_period = tim->dtim_period;
4895 dtim_count = tim->dtim_count;
4897 ifmgd->have_beacon = true;
4898 assoc_data->timeout = jiffies;
4899 assoc_data->timeout_started = true;
4901 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4902 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4903 sdata->vif.bss_conf.sync_device_ts =
4904 bss->device_ts_beacon;
4905 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4908 assoc_data->timeout = jiffies;
4909 assoc_data->timeout_started = true;
4913 run_again(sdata, assoc_data->timeout);
4915 if (bss->corrupt_data) {
4916 char *corrupt_type = "data";
4917 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4918 if (bss->corrupt_data &
4919 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4920 corrupt_type = "beacon and probe response";
4922 corrupt_type = "beacon";
4923 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4924 corrupt_type = "probe response";
4925 sdata_info(sdata, "associating with AP with corrupt %s\n",
4931 eth_zero_addr(ifmgd->bssid);
4932 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4933 ifmgd->assoc_data = NULL;
4939 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4940 struct cfg80211_deauth_request *req)
4942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4943 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4944 bool tx = !req->local_state_change;
4946 if (ifmgd->auth_data &&
4947 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4949 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4950 req->bssid, req->reason_code,
4951 ieee80211_get_reason_code_string(req->reason_code));
4953 drv_mgd_prepare_tx(sdata->local, sdata);
4954 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4955 IEEE80211_STYPE_DEAUTH,
4956 req->reason_code, tx,
4958 ieee80211_destroy_auth_data(sdata, false);
4959 ieee80211_report_disconnect(sdata, frame_buf,
4960 sizeof(frame_buf), true,
4966 if (ifmgd->assoc_data &&
4967 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4969 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4970 req->bssid, req->reason_code,
4971 ieee80211_get_reason_code_string(req->reason_code));
4973 drv_mgd_prepare_tx(sdata->local, sdata);
4974 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4975 IEEE80211_STYPE_DEAUTH,
4976 req->reason_code, tx,
4978 ieee80211_destroy_assoc_data(sdata, false, true);
4979 ieee80211_report_disconnect(sdata, frame_buf,
4980 sizeof(frame_buf), true,
4985 if (ifmgd->associated &&
4986 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4988 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4989 req->bssid, req->reason_code,
4990 ieee80211_get_reason_code_string(req->reason_code));
4992 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4993 req->reason_code, tx, frame_buf);
4994 ieee80211_report_disconnect(sdata, frame_buf,
4995 sizeof(frame_buf), true,
5003 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5004 struct cfg80211_disassoc_request *req)
5006 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5008 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5011 * cfg80211 should catch this ... but it's racy since
5012 * we can receive a disassoc frame, process it, hand it
5013 * to cfg80211 while that's in a locked section already
5014 * trying to tell us that the user wants to disconnect.
5016 if (ifmgd->associated != req->bss)
5020 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5021 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5023 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5024 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5025 req->reason_code, !req->local_state_change,
5028 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5034 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5039 * Make sure some work items will not run after this,
5040 * they will not do anything but might not have been
5041 * cancelled when disconnecting.
5043 cancel_work_sync(&ifmgd->monitor_work);
5044 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5045 cancel_work_sync(&ifmgd->request_smps_work);
5046 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5047 cancel_work_sync(&ifmgd->chswitch_work);
5048 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5051 if (ifmgd->assoc_data) {
5052 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5053 ieee80211_destroy_assoc_data(sdata, false, false);
5054 cfg80211_assoc_timeout(sdata->dev, bss);
5056 if (ifmgd->auth_data)
5057 ieee80211_destroy_auth_data(sdata, false);
5058 spin_lock_bh(&ifmgd->teardown_lock);
5059 if (ifmgd->teardown_skb) {
5060 kfree_skb(ifmgd->teardown_skb);
5061 ifmgd->teardown_skb = NULL;
5062 ifmgd->orig_teardown_skb = NULL;
5064 spin_unlock_bh(&ifmgd->teardown_lock);
5065 del_timer_sync(&ifmgd->timer);
5066 sdata_unlock(sdata);
5069 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5070 enum nl80211_cqm_rssi_threshold_event rssi_event,
5074 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5076 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5078 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5080 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5082 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5084 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5086 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5088 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5090 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);