2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
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;
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;
616 sband = local->hw.wiphy->bands[chan->band];
617 shift = ieee80211_vif_get_shift(&sdata->vif);
619 if (assoc_data->supp_rates_len) {
621 * Get all rates supported by the device and the AP as
622 * some APs don't like getting a superset of their rates
623 * in the association request (e.g. D-Link DAP 1353 in
626 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
627 assoc_data->supp_rates,
628 assoc_data->supp_rates_len,
632 * In case AP not provide any supported rates information
633 * before association, we send information element(s) with
634 * all rates that we support.
637 for (i = 0; i < sband->n_bitrates; i++) {
643 skb = alloc_skb(local->hw.extra_tx_headroom +
644 sizeof(*mgmt) + /* bit too much but doesn't matter */
645 2 + assoc_data->ssid_len + /* SSID */
646 4 + rates_len + /* (extended) rates */
647 4 + /* power capability */
648 2 + 2 * sband->n_channels + /* supported channels */
649 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
650 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
651 assoc_data->ie_len + /* extra IEs */
652 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
658 skb_reserve(skb, local->hw.extra_tx_headroom);
660 capab = WLAN_CAPABILITY_ESS;
662 if (sband->band == NL80211_BAND_2GHZ) {
663 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
664 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
667 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
668 capab |= WLAN_CAPABILITY_PRIVACY;
670 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
671 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
672 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
674 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
675 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
677 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
679 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
680 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
681 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
683 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
685 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
686 IEEE80211_STYPE_REASSOC_REQ);
687 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
688 mgmt->u.reassoc_req.listen_interval =
689 cpu_to_le16(local->hw.conf.listen_interval);
690 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
694 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
695 IEEE80211_STYPE_ASSOC_REQ);
696 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
697 mgmt->u.assoc_req.listen_interval =
698 cpu_to_le16(local->hw.conf.listen_interval);
702 pos = skb_put(skb, 2 + assoc_data->ssid_len);
703 *pos++ = WLAN_EID_SSID;
704 *pos++ = assoc_data->ssid_len;
705 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
707 /* add all rates which were marked to be used above */
708 supp_rates_len = rates_len;
709 if (supp_rates_len > 8)
712 pos = skb_put(skb, supp_rates_len + 2);
713 *pos++ = WLAN_EID_SUPP_RATES;
714 *pos++ = supp_rates_len;
717 for (i = 0; i < sband->n_bitrates; i++) {
718 if (BIT(i) & rates) {
719 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
727 if (rates_len > count) {
728 pos = skb_put(skb, rates_len - count + 2);
729 *pos++ = WLAN_EID_EXT_SUPP_RATES;
730 *pos++ = rates_len - count;
732 for (i++; i < sband->n_bitrates; i++) {
733 if (BIT(i) & rates) {
735 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
742 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
743 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
744 pos = skb_put(skb, 4);
745 *pos++ = WLAN_EID_PWR_CAPABILITY;
747 *pos++ = 0; /* min tx power */
749 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
752 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
753 /* TODO: get this in reg domain format */
754 pos = skb_put(skb, 2 * sband->n_channels + 2);
755 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
756 *pos++ = 2 * sband->n_channels;
757 for (i = 0; i < sband->n_channels; i++) {
758 *pos++ = ieee80211_frequency_to_channel(
759 sband->channels[i].center_freq);
760 *pos++ = 1; /* one channel in the subband*/
764 /* if present, add any custom IEs that go before HT */
765 if (assoc_data->ie_len) {
766 static const u8 before_ht[] = {
769 WLAN_EID_EXT_SUPP_RATES,
770 WLAN_EID_PWR_CAPABILITY,
771 WLAN_EID_SUPPORTED_CHANNELS,
774 WLAN_EID_RRM_ENABLED_CAPABILITIES,
775 WLAN_EID_MOBILITY_DOMAIN,
776 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
777 WLAN_EID_RIC_DATA, /* reassoc only */
778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
780 static const u8 after_ric[] = {
781 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
782 WLAN_EID_HT_CAPABILITY,
783 WLAN_EID_BSS_COEX_2040,
784 WLAN_EID_EXT_CAPABILITY,
785 WLAN_EID_QOS_TRAFFIC_CAPA,
786 WLAN_EID_TIM_BCAST_REQ,
787 WLAN_EID_INTERWORKING,
788 /* 60GHz doesn't happen right now */
789 WLAN_EID_VHT_CAPABILITY,
790 WLAN_EID_OPMODE_NOTIF,
793 noffset = ieee80211_ie_split_ric(assoc_data->ie,
796 ARRAY_SIZE(before_ht),
798 ARRAY_SIZE(after_ric),
800 pos = skb_put(skb, noffset - offset);
801 memcpy(pos, assoc_data->ie + offset, noffset - offset);
805 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
806 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
807 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
809 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
810 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
811 sband, chan, sdata->smps_mode);
813 /* if present, add any custom IEs that go before VHT */
814 if (assoc_data->ie_len) {
815 static const u8 before_vht[] = {
818 WLAN_EID_EXT_SUPP_RATES,
819 WLAN_EID_PWR_CAPABILITY,
820 WLAN_EID_SUPPORTED_CHANNELS,
823 WLAN_EID_RRM_ENABLED_CAPABILITIES,
824 WLAN_EID_MOBILITY_DOMAIN,
825 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
826 WLAN_EID_HT_CAPABILITY,
827 WLAN_EID_BSS_COEX_2040,
828 WLAN_EID_EXT_CAPABILITY,
829 WLAN_EID_QOS_TRAFFIC_CAPA,
830 WLAN_EID_TIM_BCAST_REQ,
831 WLAN_EID_INTERWORKING,
834 /* RIC already taken above, so no need to handle here anymore */
835 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
836 before_vht, ARRAY_SIZE(before_vht),
838 pos = skb_put(skb, noffset - offset);
839 memcpy(pos, assoc_data->ie + offset, noffset - offset);
843 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
844 ieee80211_add_vht_ie(sdata, skb, sband,
845 &assoc_data->ap_vht_cap);
847 /* if present, add any custom non-vendor IEs that go after HT */
848 if (assoc_data->ie_len) {
849 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
852 pos = skb_put(skb, noffset - offset);
853 memcpy(pos, assoc_data->ie + offset, noffset - offset);
857 if (assoc_data->wmm) {
858 if (assoc_data->uapsd) {
859 qos_info = ifmgd->uapsd_queues;
860 qos_info |= (ifmgd->uapsd_max_sp_len <<
861 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
866 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
869 /* add any remaining custom (i.e. vendor specific here) IEs */
870 if (assoc_data->ie_len) {
871 noffset = assoc_data->ie_len;
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
876 if (assoc_data->fils_kek_len &&
877 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
882 drv_mgd_prepare_tx(local, sdata);
884 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
885 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
886 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
887 IEEE80211_TX_INTFL_MLME_CONN_TX;
888 ieee80211_tx_skb(sdata, skb);
891 void ieee80211_send_pspoll(struct ieee80211_local *local,
892 struct ieee80211_sub_if_data *sdata)
894 struct ieee80211_pspoll *pspoll;
897 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
901 pspoll = (struct ieee80211_pspoll *) skb->data;
902 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
904 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
905 ieee80211_tx_skb(sdata, skb);
908 void ieee80211_send_nullfunc(struct ieee80211_local *local,
909 struct ieee80211_sub_if_data *sdata,
913 struct ieee80211_hdr_3addr *nullfunc;
914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
916 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
920 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
922 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
924 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
925 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
927 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
930 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
931 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
933 ieee80211_tx_skb(sdata, skb);
936 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
937 struct ieee80211_sub_if_data *sdata)
940 struct ieee80211_hdr *nullfunc;
943 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
946 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
950 skb_reserve(skb, local->hw.extra_tx_headroom);
952 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
953 memset(nullfunc, 0, 30);
954 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
955 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
956 nullfunc->frame_control = fc;
957 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
958 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
959 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
960 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
962 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
963 ieee80211_tx_skb(sdata, skb);
966 /* spectrum management related things */
967 static void ieee80211_chswitch_work(struct work_struct *work)
969 struct ieee80211_sub_if_data *sdata =
970 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
971 struct ieee80211_local *local = sdata->local;
972 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
975 if (!ieee80211_sdata_running(sdata))
979 mutex_lock(&local->mtx);
980 mutex_lock(&local->chanctx_mtx);
982 if (!ifmgd->associated)
985 if (!sdata->vif.csa_active)
989 * using reservation isn't immediate as it may be deferred until later
990 * with multi-vif. once reservation is complete it will re-schedule the
991 * work with no reserved_chanctx so verify chandef to check if it
992 * completed successfully
995 if (sdata->reserved_chanctx) {
997 * with multi-vif csa driver may call ieee80211_csa_finish()
998 * many times while waiting for other interfaces to use their
1001 if (sdata->reserved_ready)
1004 ret = ieee80211_vif_use_reserved_context(sdata);
1007 "failed to use reserved channel context, disconnecting (err=%d)\n",
1009 ieee80211_queue_work(&sdata->local->hw,
1010 &ifmgd->csa_connection_drop_work);
1017 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1018 &sdata->csa_chandef)) {
1020 "failed to finalize channel switch, disconnecting\n");
1021 ieee80211_queue_work(&sdata->local->hw,
1022 &ifmgd->csa_connection_drop_work);
1026 /* XXX: shouldn't really modify cfg80211-owned data! */
1027 ifmgd->associated->channel = sdata->csa_chandef.chan;
1029 ifmgd->csa_waiting_bcn = true;
1031 ieee80211_sta_reset_beacon_monitor(sdata);
1032 ieee80211_sta_reset_conn_monitor(sdata);
1035 mutex_unlock(&local->chanctx_mtx);
1036 mutex_unlock(&local->mtx);
1037 sdata_unlock(sdata);
1040 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1042 struct ieee80211_local *local = sdata->local;
1043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1046 sdata_assert_lock(sdata);
1048 WARN_ON(!sdata->vif.csa_active);
1050 if (sdata->csa_block_tx) {
1051 ieee80211_wake_vif_queues(local, sdata,
1052 IEEE80211_QUEUE_STOP_REASON_CSA);
1053 sdata->csa_block_tx = false;
1056 sdata->vif.csa_active = false;
1057 ifmgd->csa_waiting_bcn = false;
1059 ret = drv_post_channel_switch(sdata);
1062 "driver post channel switch failed, disconnecting\n");
1063 ieee80211_queue_work(&local->hw,
1064 &ifmgd->csa_connection_drop_work);
1068 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1071 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1073 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1074 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1076 trace_api_chswitch_done(sdata, success);
1079 "driver channel switch failed, disconnecting\n");
1080 ieee80211_queue_work(&sdata->local->hw,
1081 &ifmgd->csa_connection_drop_work);
1083 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1086 EXPORT_SYMBOL(ieee80211_chswitch_done);
1088 static void ieee80211_chswitch_timer(unsigned long data)
1090 struct ieee80211_sub_if_data *sdata =
1091 (struct ieee80211_sub_if_data *) data;
1093 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1097 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1098 u64 timestamp, u32 device_timestamp,
1099 struct ieee802_11_elems *elems,
1102 struct ieee80211_local *local = sdata->local;
1103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1104 struct cfg80211_bss *cbss = ifmgd->associated;
1105 struct ieee80211_chanctx_conf *conf;
1106 struct ieee80211_chanctx *chanctx;
1107 enum nl80211_band current_band;
1108 struct ieee80211_csa_ie csa_ie;
1109 struct ieee80211_channel_switch ch_switch;
1112 sdata_assert_lock(sdata);
1117 if (local->scanning)
1120 /* disregard subsequent announcements if we are already processing */
1121 if (sdata->vif.csa_active)
1124 current_band = cbss->channel->band;
1125 memset(&csa_ie, 0, sizeof(csa_ie));
1126 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1128 ifmgd->associated->bssid, &csa_ie);
1130 ieee80211_queue_work(&local->hw,
1131 &ifmgd->csa_connection_drop_work);
1135 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1136 IEEE80211_CHAN_DISABLED)) {
1138 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1139 ifmgd->associated->bssid,
1140 csa_ie.chandef.chan->center_freq,
1141 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1142 csa_ie.chandef.center_freq2);
1143 ieee80211_queue_work(&local->hw,
1144 &ifmgd->csa_connection_drop_work);
1148 if (cfg80211_chandef_identical(&csa_ie.chandef,
1149 &sdata->vif.bss_conf.chandef)) {
1150 if (ifmgd->csa_ignored_same_chan)
1153 "AP %pM tries to chanswitch to same channel, ignore\n",
1154 ifmgd->associated->bssid);
1155 ifmgd->csa_ignored_same_chan = true;
1160 * Drop all TDLS peers - either we disconnect or move to a different
1161 * channel from this point on. There's no telling what our peer will do.
1162 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1163 * have an incompatible wider chandef.
1165 ieee80211_teardown_tdls_peers(sdata);
1167 mutex_lock(&local->mtx);
1168 mutex_lock(&local->chanctx_mtx);
1169 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1170 lockdep_is_held(&local->chanctx_mtx));
1173 "no channel context assigned to vif?, disconnecting\n");
1174 goto drop_connection;
1177 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1179 if (local->use_chanctx &&
1180 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1182 "driver doesn't support chan-switch with channel contexts\n");
1183 goto drop_connection;
1186 ch_switch.timestamp = timestamp;
1187 ch_switch.device_timestamp = device_timestamp;
1188 ch_switch.block_tx = csa_ie.mode;
1189 ch_switch.chandef = csa_ie.chandef;
1190 ch_switch.count = csa_ie.count;
1192 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1194 "preparing for channel switch failed, disconnecting\n");
1195 goto drop_connection;
1198 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1199 chanctx->mode, false);
1202 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1204 goto drop_connection;
1206 mutex_unlock(&local->chanctx_mtx);
1208 sdata->vif.csa_active = true;
1209 sdata->csa_chandef = csa_ie.chandef;
1210 sdata->csa_block_tx = csa_ie.mode;
1211 ifmgd->csa_ignored_same_chan = false;
1213 if (sdata->csa_block_tx)
1214 ieee80211_stop_vif_queues(local, sdata,
1215 IEEE80211_QUEUE_STOP_REASON_CSA);
1216 mutex_unlock(&local->mtx);
1218 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1221 if (local->ops->channel_switch) {
1222 /* use driver's channel switch callback */
1223 drv_channel_switch(local, sdata, &ch_switch);
1227 /* channel switch handled in software */
1228 if (csa_ie.count <= 1)
1229 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1231 mod_timer(&ifmgd->chswitch_timer,
1232 TU_TO_EXP_TIME((csa_ie.count - 1) *
1233 cbss->beacon_interval));
1236 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1237 mutex_unlock(&local->chanctx_mtx);
1238 mutex_unlock(&local->mtx);
1242 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1243 struct ieee80211_channel *channel,
1244 const u8 *country_ie, u8 country_ie_len,
1245 const u8 *pwr_constr_elem,
1246 int *chan_pwr, int *pwr_reduction)
1248 struct ieee80211_country_ie_triplet *triplet;
1249 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1250 int i, chan_increment;
1251 bool have_chan_pwr = false;
1254 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1257 triplet = (void *)(country_ie + 3);
1258 country_ie_len -= 3;
1260 switch (channel->band) {
1264 case NL80211_BAND_2GHZ:
1265 case NL80211_BAND_60GHZ:
1268 case NL80211_BAND_5GHZ:
1274 while (country_ie_len >= 3) {
1275 u8 first_channel = triplet->chans.first_channel;
1277 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1280 for (i = 0; i < triplet->chans.num_channels; i++) {
1281 if (first_channel + i * chan_increment == chan) {
1282 have_chan_pwr = true;
1283 *chan_pwr = triplet->chans.max_power;
1292 country_ie_len -= 3;
1295 if (have_chan_pwr && pwr_constr_elem)
1296 *pwr_reduction = *pwr_constr_elem;
1300 return have_chan_pwr;
1303 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1304 struct ieee80211_channel *channel,
1305 const u8 *cisco_dtpc_ie,
1308 /* From practical testing, the first data byte of the DTPC element
1309 * seems to contain the requested dBm level, and the CLI on Cisco
1310 * APs clearly state the range is -127 to 127 dBm, which indicates
1311 * a signed byte, although it seemingly never actually goes negative.
1312 * The other byte seems to always be zero.
1314 *pwr_level = (__s8)cisco_dtpc_ie[4];
1317 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1318 struct ieee80211_channel *channel,
1319 struct ieee80211_mgmt *mgmt,
1320 const u8 *country_ie, u8 country_ie_len,
1321 const u8 *pwr_constr_ie,
1322 const u8 *cisco_dtpc_ie)
1324 bool has_80211h_pwr = false, has_cisco_pwr = false;
1325 int chan_pwr = 0, pwr_reduction_80211h = 0;
1326 int pwr_level_cisco, pwr_level_80211h;
1328 __le16 capab = mgmt->u.probe_resp.capab_info;
1331 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1332 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1333 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1334 sdata, channel, country_ie, country_ie_len,
1335 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1337 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1340 if (cisco_dtpc_ie) {
1341 ieee80211_find_cisco_dtpc(
1342 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1343 has_cisco_pwr = true;
1346 if (!has_80211h_pwr && !has_cisco_pwr)
1349 /* If we have both 802.11h and Cisco DTPC, apply both limits
1350 * by picking the smallest of the two power levels advertised.
1352 if (has_80211h_pwr &&
1353 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1354 new_ap_level = pwr_level_80211h;
1356 if (sdata->ap_power_level == new_ap_level)
1360 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1361 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1362 sdata->u.mgd.bssid);
1363 } else { /* has_cisco_pwr is always true here. */
1364 new_ap_level = pwr_level_cisco;
1366 if (sdata->ap_power_level == new_ap_level)
1370 "Limiting TX power to %d dBm as advertised by %pM\n",
1371 pwr_level_cisco, sdata->u.mgd.bssid);
1374 sdata->ap_power_level = new_ap_level;
1375 if (__ieee80211_recalc_txpower(sdata))
1376 return BSS_CHANGED_TXPOWER;
1381 static void ieee80211_enable_ps(struct ieee80211_local *local,
1382 struct ieee80211_sub_if_data *sdata)
1384 struct ieee80211_conf *conf = &local->hw.conf;
1387 * If we are scanning right now then the parameters will
1388 * take effect when scan finishes.
1390 if (local->scanning)
1393 if (conf->dynamic_ps_timeout > 0 &&
1394 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1395 mod_timer(&local->dynamic_ps_timer, jiffies +
1396 msecs_to_jiffies(conf->dynamic_ps_timeout));
1398 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1399 ieee80211_send_nullfunc(local, sdata, true);
1401 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1402 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1405 conf->flags |= IEEE80211_CONF_PS;
1406 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1410 static void ieee80211_change_ps(struct ieee80211_local *local)
1412 struct ieee80211_conf *conf = &local->hw.conf;
1414 if (local->ps_sdata) {
1415 ieee80211_enable_ps(local, local->ps_sdata);
1416 } else if (conf->flags & IEEE80211_CONF_PS) {
1417 conf->flags &= ~IEEE80211_CONF_PS;
1418 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1419 del_timer_sync(&local->dynamic_ps_timer);
1420 cancel_work_sync(&local->dynamic_ps_enable_work);
1424 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1426 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1427 struct sta_info *sta = NULL;
1428 bool authorized = false;
1430 if (!mgd->powersave)
1436 if (!mgd->associated)
1439 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1442 if (!mgd->have_beacon)
1446 sta = sta_info_get(sdata, mgd->bssid);
1448 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1454 /* need to hold RTNL or interface lock */
1455 void ieee80211_recalc_ps(struct ieee80211_local *local)
1457 struct ieee80211_sub_if_data *sdata, *found = NULL;
1461 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1462 local->ps_sdata = NULL;
1466 list_for_each_entry(sdata, &local->interfaces, list) {
1467 if (!ieee80211_sdata_running(sdata))
1469 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1470 /* If an AP vif is found, then disable PS
1471 * by setting the count to zero thereby setting
1477 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1483 if (count == 1 && ieee80211_powersave_allowed(found)) {
1484 u8 dtimper = found->u.mgd.dtim_period;
1486 timeout = local->dynamic_ps_forced_timeout;
1489 local->hw.conf.dynamic_ps_timeout = timeout;
1491 /* If the TIM IE is invalid, pretend the value is 1 */
1495 local->hw.conf.ps_dtim_period = dtimper;
1496 local->ps_sdata = found;
1498 local->ps_sdata = NULL;
1501 ieee80211_change_ps(local);
1504 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1506 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1508 if (sdata->vif.bss_conf.ps != ps_allowed) {
1509 sdata->vif.bss_conf.ps = ps_allowed;
1510 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1514 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1516 struct ieee80211_local *local =
1517 container_of(work, struct ieee80211_local,
1518 dynamic_ps_disable_work);
1520 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1521 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1522 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1525 ieee80211_wake_queues_by_reason(&local->hw,
1526 IEEE80211_MAX_QUEUE_MAP,
1527 IEEE80211_QUEUE_STOP_REASON_PS,
1531 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1533 struct ieee80211_local *local =
1534 container_of(work, struct ieee80211_local,
1535 dynamic_ps_enable_work);
1536 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1537 struct ieee80211_if_managed *ifmgd;
1538 unsigned long flags;
1541 /* can only happen when PS was just disabled anyway */
1545 ifmgd = &sdata->u.mgd;
1547 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1550 if (local->hw.conf.dynamic_ps_timeout > 0) {
1551 /* don't enter PS if TX frames are pending */
1552 if (drv_tx_frames_pending(local)) {
1553 mod_timer(&local->dynamic_ps_timer, jiffies +
1555 local->hw.conf.dynamic_ps_timeout));
1560 * transmission can be stopped by others which leads to
1561 * dynamic_ps_timer expiry. Postpone the ps timer if it
1562 * is not the actual idle state.
1564 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1565 for (q = 0; q < local->hw.queues; q++) {
1566 if (local->queue_stop_reasons[q]) {
1567 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1569 mod_timer(&local->dynamic_ps_timer, jiffies +
1571 local->hw.conf.dynamic_ps_timeout));
1575 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1578 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1579 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1580 if (drv_tx_frames_pending(local)) {
1581 mod_timer(&local->dynamic_ps_timer, jiffies +
1583 local->hw.conf.dynamic_ps_timeout));
1585 ieee80211_send_nullfunc(local, sdata, true);
1586 /* Flush to get the tx status of nullfunc frame */
1587 ieee80211_flush_queues(local, sdata, false);
1591 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1592 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1593 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1594 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1595 local->hw.conf.flags |= IEEE80211_CONF_PS;
1596 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1600 void ieee80211_dynamic_ps_timer(unsigned long data)
1602 struct ieee80211_local *local = (void *) data;
1604 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1607 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1609 struct delayed_work *delayed_work = to_delayed_work(work);
1610 struct ieee80211_sub_if_data *sdata =
1611 container_of(delayed_work, struct ieee80211_sub_if_data,
1612 dfs_cac_timer_work);
1613 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1615 mutex_lock(&sdata->local->mtx);
1616 if (sdata->wdev.cac_started) {
1617 ieee80211_vif_release_channel(sdata);
1618 cfg80211_cac_event(sdata->dev, &chandef,
1619 NL80211_RADAR_CAC_FINISHED,
1622 mutex_unlock(&sdata->local->mtx);
1626 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1628 struct ieee80211_local *local = sdata->local;
1629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1633 if (local->hw.queues < IEEE80211_NUM_ACS)
1636 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1637 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1639 unsigned long now = jiffies;
1641 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1642 tx_tspec->admitted_time &&
1643 time_after(now, tx_tspec->time_slice_start + HZ)) {
1644 tx_tspec->consumed_tx_time = 0;
1645 tx_tspec->time_slice_start = now;
1647 if (tx_tspec->downgraded)
1649 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1652 switch (tx_tspec->action) {
1653 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1654 /* take the original parameters */
1655 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1657 "failed to set TX queue parameters for queue %d\n",
1659 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1660 tx_tspec->downgraded = false;
1663 case TX_TSPEC_ACTION_DOWNGRADE:
1664 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1665 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1669 /* downgrade next lower non-ACM AC */
1670 for (non_acm_ac = ac + 1;
1671 non_acm_ac < IEEE80211_NUM_ACS;
1673 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1675 /* Usually the loop will result in using BK even if it
1676 * requires admission control, but such a configuration
1677 * makes no sense and we have to transmit somehow - the
1678 * AC selection does the same thing.
1679 * If we started out trying to downgrade from BK, then
1680 * the extra condition here might be needed.
1682 if (non_acm_ac >= IEEE80211_NUM_ACS)
1683 non_acm_ac = IEEE80211_AC_BK;
1684 if (drv_conf_tx(local, sdata, ac,
1685 &sdata->tx_conf[non_acm_ac]))
1687 "failed to set TX queue parameters for queue %d\n",
1689 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1691 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1692 tx_tspec->time_slice_start + HZ - now + 1);
1694 case TX_TSPEC_ACTION_NONE:
1703 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1705 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1706 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1709 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1711 struct ieee80211_sub_if_data *sdata;
1713 sdata = container_of(work, struct ieee80211_sub_if_data,
1714 u.mgd.tx_tspec_wk.work);
1715 ieee80211_sta_handle_tspec_ac_params(sdata);
1719 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1720 struct ieee80211_sub_if_data *sdata,
1721 const u8 *wmm_param, size_t wmm_param_len)
1723 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1728 u8 uapsd_queues = 0;
1730 if (!local->ops->conf_tx)
1733 if (local->hw.queues < IEEE80211_NUM_ACS)
1739 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1742 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1743 uapsd_queues = ifmgd->uapsd_queues;
1745 count = wmm_param[6] & 0x0f;
1746 if (count == ifmgd->wmm_last_param_set)
1748 ifmgd->wmm_last_param_set = count;
1750 pos = wmm_param + 8;
1751 left = wmm_param_len - 8;
1753 memset(¶ms, 0, sizeof(params));
1756 for (; left >= 4; left -= 4, pos += 4) {
1757 int aci = (pos[0] >> 5) & 0x03;
1758 int acm = (pos[0] >> 4) & 0x01;
1763 ac = IEEE80211_AC_BK;
1765 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1766 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1770 ac = IEEE80211_AC_VI;
1772 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1773 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1777 ac = IEEE80211_AC_VO;
1779 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1780 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1785 ac = IEEE80211_AC_BE;
1787 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1788 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1793 params[ac].aifs = pos[0] & 0x0f;
1795 if (params[ac].aifs < 2) {
1797 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1798 params[ac].aifs, aci);
1799 params[ac].aifs = 2;
1801 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1802 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1803 params[ac].txop = get_unaligned_le16(pos + 2);
1804 params[ac].acm = acm;
1805 params[ac].uapsd = uapsd;
1807 if (params[ac].cw_min > params[ac].cw_max) {
1809 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1810 params[ac].cw_min, params[ac].cw_max, aci);
1815 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1817 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1819 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1820 params[ac].txop, params[ac].uapsd,
1821 ifmgd->tx_tspec[ac].downgraded);
1822 sdata->tx_conf[ac] = params[ac];
1823 if (!ifmgd->tx_tspec[ac].downgraded &&
1824 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
1826 "failed to set TX queue parameters for AC %d\n",
1830 /* enable WMM or activate new settings */
1831 sdata->vif.bss_conf.qos = true;
1835 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1837 lockdep_assert_held(&sdata->local->mtx);
1839 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1840 ieee80211_run_deferred_scan(sdata->local);
1843 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1845 mutex_lock(&sdata->local->mtx);
1846 __ieee80211_stop_poll(sdata);
1847 mutex_unlock(&sdata->local->mtx);
1850 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1851 u16 capab, bool erp_valid, u8 erp)
1853 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1854 struct ieee80211_supported_band *sband;
1856 bool use_protection;
1857 bool use_short_preamble;
1858 bool use_short_slot;
1860 sband = ieee80211_get_sband(sdata);
1865 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1866 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1868 use_protection = false;
1869 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1872 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1873 if (sband->band == NL80211_BAND_5GHZ)
1874 use_short_slot = true;
1876 if (use_protection != bss_conf->use_cts_prot) {
1877 bss_conf->use_cts_prot = use_protection;
1878 changed |= BSS_CHANGED_ERP_CTS_PROT;
1881 if (use_short_preamble != bss_conf->use_short_preamble) {
1882 bss_conf->use_short_preamble = use_short_preamble;
1883 changed |= BSS_CHANGED_ERP_PREAMBLE;
1886 if (use_short_slot != bss_conf->use_short_slot) {
1887 bss_conf->use_short_slot = use_short_slot;
1888 changed |= BSS_CHANGED_ERP_SLOT;
1894 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1895 struct cfg80211_bss *cbss,
1896 u32 bss_info_changed)
1898 struct ieee80211_bss *bss = (void *)cbss->priv;
1899 struct ieee80211_local *local = sdata->local;
1900 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1902 bss_info_changed |= BSS_CHANGED_ASSOC;
1903 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1904 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1906 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1907 beacon_loss_count * bss_conf->beacon_int));
1909 sdata->u.mgd.associated = cbss;
1910 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1912 ieee80211_check_rate_mask(sdata);
1914 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1916 if (sdata->vif.p2p ||
1917 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1918 const struct cfg80211_bss_ies *ies;
1921 ies = rcu_dereference(cbss->ies);
1925 ret = cfg80211_get_p2p_attr(
1926 ies->data, ies->len,
1927 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1928 (u8 *) &bss_conf->p2p_noa_attr,
1929 sizeof(bss_conf->p2p_noa_attr));
1931 sdata->u.mgd.p2p_noa_index =
1932 bss_conf->p2p_noa_attr.index;
1933 bss_info_changed |= BSS_CHANGED_P2P_PS;
1939 /* just to be sure */
1940 ieee80211_stop_poll(sdata);
1942 ieee80211_led_assoc(local, 1);
1944 if (sdata->u.mgd.have_beacon) {
1946 * If the AP is buggy we may get here with no DTIM period
1947 * known, so assume it's 1 which is the only safe assumption
1948 * in that case, although if the TIM IE is broken powersave
1949 * probably just won't work at all.
1951 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1952 bss_conf->beacon_rate = bss->beacon_rate;
1953 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1955 bss_conf->beacon_rate = NULL;
1956 bss_conf->dtim_period = 0;
1959 bss_conf->assoc = 1;
1961 /* Tell the driver to monitor connection quality (if supported) */
1962 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1963 bss_conf->cqm_rssi_thold)
1964 bss_info_changed |= BSS_CHANGED_CQM;
1966 /* Enable ARP filtering */
1967 if (bss_conf->arp_addr_cnt)
1968 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1970 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1972 mutex_lock(&local->iflist_mtx);
1973 ieee80211_recalc_ps(local);
1974 mutex_unlock(&local->iflist_mtx);
1976 ieee80211_recalc_smps(sdata);
1977 ieee80211_recalc_ps_vif(sdata);
1979 netif_carrier_on(sdata->dev);
1982 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1983 u16 stype, u16 reason, bool tx,
1986 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1987 struct ieee80211_local *local = sdata->local;
1990 sdata_assert_lock(sdata);
1992 if (WARN_ON_ONCE(tx && !frame_buf))
1995 if (WARN_ON(!ifmgd->associated))
1998 ieee80211_stop_poll(sdata);
2000 ifmgd->associated = NULL;
2001 netif_carrier_off(sdata->dev);
2004 * if we want to get out of ps before disassoc (why?) we have
2005 * to do it before sending disassoc, as otherwise the null-packet
2008 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2009 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2010 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2012 local->ps_sdata = NULL;
2014 /* disable per-vif ps */
2015 ieee80211_recalc_ps_vif(sdata);
2017 /* make sure ongoing transmission finishes */
2021 * drop any frame before deauth/disassoc, this can be data or
2022 * management frame. Since we are disconnecting, we should not
2023 * insist sending these frames which can take time and delay
2024 * the disconnection and possible the roaming.
2027 ieee80211_flush_queues(local, sdata, true);
2029 /* deauthenticate/disassociate now */
2030 if (tx || frame_buf)
2031 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2032 reason, tx, frame_buf);
2034 /* flush out frame - make sure the deauth was actually sent */
2036 ieee80211_flush_queues(local, sdata, false);
2038 /* clear bssid only after building the needed mgmt frames */
2039 eth_zero_addr(ifmgd->bssid);
2041 /* remove AP and TDLS peers */
2042 sta_info_flush(sdata);
2044 /* finally reset all BSS / config parameters */
2045 changed |= ieee80211_reset_erp_info(sdata);
2047 ieee80211_led_assoc(local, 0);
2048 changed |= BSS_CHANGED_ASSOC;
2049 sdata->vif.bss_conf.assoc = false;
2051 ifmgd->p2p_noa_index = -1;
2052 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2053 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2055 /* on the next assoc, re-program HT/VHT parameters */
2056 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2057 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2058 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2059 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2061 /* reset MU-MIMO ownership and group data */
2062 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2063 sizeof(sdata->vif.bss_conf.mu_group.membership));
2064 memset(sdata->vif.bss_conf.mu_group.position, 0,
2065 sizeof(sdata->vif.bss_conf.mu_group.position));
2066 changed |= BSS_CHANGED_MU_GROUPS;
2067 sdata->vif.mu_mimo_owner = false;
2069 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2071 del_timer_sync(&local->dynamic_ps_timer);
2072 cancel_work_sync(&local->dynamic_ps_enable_work);
2074 /* Disable ARP filtering */
2075 if (sdata->vif.bss_conf.arp_addr_cnt)
2076 changed |= BSS_CHANGED_ARP_FILTER;
2078 sdata->vif.bss_conf.qos = false;
2079 changed |= BSS_CHANGED_QOS;
2081 /* The BSSID (not really interesting) and HT changed */
2082 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2083 ieee80211_bss_info_change_notify(sdata, changed);
2085 /* disassociated - set to defaults now */
2086 ieee80211_set_wmm_default(sdata, false, false);
2088 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2089 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2090 del_timer_sync(&sdata->u.mgd.timer);
2091 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2093 sdata->vif.bss_conf.dtim_period = 0;
2094 sdata->vif.bss_conf.beacon_rate = NULL;
2096 ifmgd->have_beacon = false;
2099 mutex_lock(&local->mtx);
2100 ieee80211_vif_release_channel(sdata);
2102 sdata->vif.csa_active = false;
2103 ifmgd->csa_waiting_bcn = false;
2104 ifmgd->csa_ignored_same_chan = false;
2105 if (sdata->csa_block_tx) {
2106 ieee80211_wake_vif_queues(local, sdata,
2107 IEEE80211_QUEUE_STOP_REASON_CSA);
2108 sdata->csa_block_tx = false;
2110 mutex_unlock(&local->mtx);
2112 /* existing TX TSPEC sessions no longer exist */
2113 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2114 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2116 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2119 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2120 struct ieee80211_hdr *hdr)
2123 * We can postpone the mgd.timer whenever receiving unicast frames
2124 * from AP because we know that the connection is working both ways
2125 * at that time. But multicast frames (and hence also beacons) must
2126 * be ignored here, because we need to trigger the timer during
2127 * data idle periods for sending the periodic probe request to the
2128 * AP we're connected to.
2130 if (is_multicast_ether_addr(hdr->addr1))
2133 ieee80211_sta_reset_conn_monitor(sdata);
2136 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2138 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2139 struct ieee80211_local *local = sdata->local;
2141 mutex_lock(&local->mtx);
2142 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2145 __ieee80211_stop_poll(sdata);
2147 mutex_lock(&local->iflist_mtx);
2148 ieee80211_recalc_ps(local);
2149 mutex_unlock(&local->iflist_mtx);
2151 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2155 * We've received a probe response, but are not sure whether
2156 * we have or will be receiving any beacons or data, so let's
2157 * schedule the timers again, just in case.
2159 ieee80211_sta_reset_beacon_monitor(sdata);
2161 mod_timer(&ifmgd->conn_mon_timer,
2162 round_jiffies_up(jiffies +
2163 IEEE80211_CONNECTION_IDLE_TIME));
2165 mutex_unlock(&local->mtx);
2168 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2169 struct ieee80211_hdr *hdr,
2172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2173 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2174 int ac = ieee80211_ac_from_tid(tid);
2175 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2176 unsigned long now = jiffies;
2178 if (likely(!tx_tspec->admitted_time))
2181 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2182 tx_tspec->consumed_tx_time = 0;
2183 tx_tspec->time_slice_start = now;
2185 if (tx_tspec->downgraded) {
2186 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2187 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2191 if (tx_tspec->downgraded)
2194 tx_tspec->consumed_tx_time += tx_time;
2196 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2197 tx_tspec->downgraded = true;
2198 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2199 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2203 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2204 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2206 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2208 if (!ieee80211_is_data(hdr->frame_control))
2211 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2212 sdata->u.mgd.probe_send_count > 0) {
2214 ieee80211_sta_reset_conn_monitor(sdata);
2216 sdata->u.mgd.nullfunc_failed = true;
2217 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2222 ieee80211_sta_reset_conn_monitor(sdata);
2225 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229 u8 *dst = ifmgd->associated->bssid;
2230 u8 unicast_limit = max(1, max_probe_tries - 3);
2231 struct sta_info *sta;
2234 * Try sending broadcast probe requests for the last three
2235 * probe requests after the first ones failed since some
2236 * buggy APs only support broadcast probe requests.
2238 if (ifmgd->probe_send_count >= unicast_limit)
2242 * When the hardware reports an accurate Tx ACK status, it's
2243 * better to send a nullfunc frame instead of a probe request,
2244 * as it will kick us off the AP quickly if we aren't associated
2245 * anymore. The timeout will be reset if the frame is ACKed by
2248 ifmgd->probe_send_count++;
2251 mutex_lock(&sdata->local->sta_mtx);
2252 sta = sta_info_get(sdata, dst);
2254 ieee80211_check_fast_rx(sta);
2255 mutex_unlock(&sdata->local->sta_mtx);
2258 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2259 ifmgd->nullfunc_failed = false;
2260 ieee80211_send_nullfunc(sdata->local, sdata, false);
2265 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2266 if (WARN_ON_ONCE(ssid == NULL))
2271 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2272 ssid + 2, ssid_len, NULL,
2273 0, (u32) -1, true, 0,
2274 ifmgd->associated->channel, false);
2278 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2279 run_again(sdata, ifmgd->probe_timeout);
2282 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2286 bool already = false;
2288 if (!ieee80211_sdata_running(sdata))
2293 if (!ifmgd->associated)
2296 mutex_lock(&sdata->local->mtx);
2298 if (sdata->local->tmp_channel || sdata->local->scanning) {
2299 mutex_unlock(&sdata->local->mtx);
2304 mlme_dbg_ratelimited(sdata,
2305 "detected beacon loss from AP (missed %d beacons) - probing\n",
2308 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2312 * The driver/our work has already reported this event or the
2313 * connection monitoring has kicked in and we have already sent
2314 * a probe request. Or maybe the AP died and the driver keeps
2315 * reporting until we disassociate...
2317 * In either case we have to ignore the current call to this
2318 * function (except for setting the correct probe reason bit)
2319 * because otherwise we would reset the timer every time and
2320 * never check whether we received a probe response!
2322 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2325 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2327 mutex_unlock(&sdata->local->mtx);
2332 mutex_lock(&sdata->local->iflist_mtx);
2333 ieee80211_recalc_ps(sdata->local);
2334 mutex_unlock(&sdata->local->iflist_mtx);
2336 ifmgd->probe_send_count = 0;
2337 ieee80211_mgd_probe_ap_send(sdata);
2339 sdata_unlock(sdata);
2342 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2343 struct ieee80211_vif *vif)
2345 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2347 struct cfg80211_bss *cbss;
2348 struct sk_buff *skb;
2352 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2355 sdata_assert_lock(sdata);
2357 if (ifmgd->associated)
2358 cbss = ifmgd->associated;
2359 else if (ifmgd->auth_data)
2360 cbss = ifmgd->auth_data->bss;
2361 else if (ifmgd->assoc_data)
2362 cbss = ifmgd->assoc_data->bss;
2367 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2368 if (WARN_ON_ONCE(ssid == NULL))
2373 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2374 (u32) -1, cbss->channel,
2381 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2383 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2384 const u8 *buf, size_t len, bool tx,
2387 struct ieee80211_event event = {
2389 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2390 .u.mlme.reason = reason,
2394 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2396 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2398 drv_event_callback(sdata->local, sdata, &event);
2401 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2403 struct ieee80211_local *local = sdata->local;
2404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2405 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2408 if (!ifmgd->associated) {
2409 sdata_unlock(sdata);
2413 /* AP is probably out of range (or not reachable for another reason) so
2414 * remove the bss struct for that AP.
2416 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2418 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2419 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2421 mutex_lock(&local->mtx);
2422 sdata->vif.csa_active = false;
2423 ifmgd->csa_waiting_bcn = false;
2424 if (sdata->csa_block_tx) {
2425 ieee80211_wake_vif_queues(local, sdata,
2426 IEEE80211_QUEUE_STOP_REASON_CSA);
2427 sdata->csa_block_tx = false;
2429 mutex_unlock(&local->mtx);
2431 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2432 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2434 sdata_unlock(sdata);
2437 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2439 struct ieee80211_sub_if_data *sdata =
2440 container_of(work, struct ieee80211_sub_if_data,
2441 u.mgd.beacon_connection_loss_work);
2442 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2444 if (ifmgd->associated)
2445 ifmgd->beacon_loss_count++;
2447 if (ifmgd->connection_loss) {
2448 sdata_info(sdata, "Connection to AP %pM lost\n",
2450 __ieee80211_disconnect(sdata);
2452 ieee80211_mgd_probe_ap(sdata, true);
2456 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2458 struct ieee80211_sub_if_data *sdata =
2459 container_of(work, struct ieee80211_sub_if_data,
2460 u.mgd.csa_connection_drop_work);
2462 __ieee80211_disconnect(sdata);
2465 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2467 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2468 struct ieee80211_hw *hw = &sdata->local->hw;
2470 trace_api_beacon_loss(sdata);
2472 sdata->u.mgd.connection_loss = false;
2473 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2475 EXPORT_SYMBOL(ieee80211_beacon_loss);
2477 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2479 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2480 struct ieee80211_hw *hw = &sdata->local->hw;
2482 trace_api_connection_loss(sdata);
2484 sdata->u.mgd.connection_loss = true;
2485 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2487 EXPORT_SYMBOL(ieee80211_connection_loss);
2490 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2493 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2495 sdata_assert_lock(sdata);
2499 * we are not authenticated yet, the only timer that could be
2500 * running is the timeout for the authentication response which
2501 * which is not relevant anymore.
2503 del_timer_sync(&sdata->u.mgd.timer);
2504 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2506 eth_zero_addr(sdata->u.mgd.bssid);
2507 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2508 sdata->u.mgd.flags = 0;
2509 mutex_lock(&sdata->local->mtx);
2510 ieee80211_vif_release_channel(sdata);
2511 mutex_unlock(&sdata->local->mtx);
2514 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2516 sdata->u.mgd.auth_data = NULL;
2519 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2520 bool assoc, bool abandon)
2522 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2524 sdata_assert_lock(sdata);
2528 * we are not associated yet, the only timer that could be
2529 * running is the timeout for the association response which
2530 * which is not relevant anymore.
2532 del_timer_sync(&sdata->u.mgd.timer);
2533 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2535 eth_zero_addr(sdata->u.mgd.bssid);
2536 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2537 sdata->u.mgd.flags = 0;
2538 sdata->vif.mu_mimo_owner = false;
2540 mutex_lock(&sdata->local->mtx);
2541 ieee80211_vif_release_channel(sdata);
2542 mutex_unlock(&sdata->local->mtx);
2545 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2549 sdata->u.mgd.assoc_data = NULL;
2552 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2553 struct ieee80211_mgmt *mgmt, size_t len)
2555 struct ieee80211_local *local = sdata->local;
2556 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2558 struct ieee802_11_elems elems;
2561 pos = mgmt->u.auth.variable;
2562 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2563 if (!elems.challenge)
2565 auth_data->expected_transaction = 4;
2566 drv_mgd_prepare_tx(sdata->local, sdata);
2567 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2568 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2569 IEEE80211_TX_INTFL_MLME_CONN_TX;
2570 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2571 elems.challenge - 2, elems.challenge_len + 2,
2572 auth_data->bss->bssid, auth_data->bss->bssid,
2573 auth_data->key, auth_data->key_len,
2574 auth_data->key_idx, tx_flags);
2577 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2578 struct ieee80211_mgmt *mgmt, size_t len)
2580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2582 u16 auth_alg, auth_transaction, status_code;
2583 struct sta_info *sta;
2584 struct ieee80211_event event = {
2586 .u.mlme.data = AUTH_EVENT,
2589 sdata_assert_lock(sdata);
2594 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2597 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2599 if (!ether_addr_equal(bssid, mgmt->bssid))
2602 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2603 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2604 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2606 if (auth_alg != ifmgd->auth_data->algorithm ||
2607 auth_transaction != ifmgd->auth_data->expected_transaction) {
2608 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2609 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2611 ifmgd->auth_data->expected_transaction);
2615 if (status_code != WLAN_STATUS_SUCCESS) {
2616 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2617 mgmt->sa, status_code);
2618 ieee80211_destroy_auth_data(sdata, false);
2619 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2620 event.u.mlme.status = MLME_DENIED;
2621 event.u.mlme.reason = status_code;
2622 drv_event_callback(sdata->local, sdata, &event);
2626 switch (ifmgd->auth_data->algorithm) {
2627 case WLAN_AUTH_OPEN:
2628 case WLAN_AUTH_LEAP:
2631 case WLAN_AUTH_FILS_SK:
2632 case WLAN_AUTH_FILS_SK_PFS:
2633 case WLAN_AUTH_FILS_PK:
2635 case WLAN_AUTH_SHARED_KEY:
2636 if (ifmgd->auth_data->expected_transaction != 4) {
2637 ieee80211_auth_challenge(sdata, mgmt, len);
2638 /* need another frame */
2643 WARN_ONCE(1, "invalid auth alg %d",
2644 ifmgd->auth_data->algorithm);
2648 event.u.mlme.status = MLME_SUCCESS;
2649 drv_event_callback(sdata->local, sdata, &event);
2650 sdata_info(sdata, "authenticated\n");
2651 ifmgd->auth_data->done = true;
2652 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2653 ifmgd->auth_data->timeout_started = true;
2654 run_again(sdata, ifmgd->auth_data->timeout);
2656 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2657 ifmgd->auth_data->expected_transaction != 2) {
2659 * Report auth frame to user space for processing since another
2660 * round of Authentication frames is still needed.
2662 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2666 /* move station state to auth */
2667 mutex_lock(&sdata->local->sta_mtx);
2668 sta = sta_info_get(sdata, bssid);
2670 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2673 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2674 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2677 mutex_unlock(&sdata->local->sta_mtx);
2679 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2682 mutex_unlock(&sdata->local->sta_mtx);
2683 /* ignore frame -- wait for timeout */
2686 #define case_WLAN(type) \
2687 case WLAN_REASON_##type: return #type
2689 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2691 switch (reason_code) {
2692 case_WLAN(UNSPECIFIED);
2693 case_WLAN(PREV_AUTH_NOT_VALID);
2694 case_WLAN(DEAUTH_LEAVING);
2695 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2696 case_WLAN(DISASSOC_AP_BUSY);
2697 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2698 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2699 case_WLAN(DISASSOC_STA_HAS_LEFT);
2700 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2701 case_WLAN(DISASSOC_BAD_POWER);
2702 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2703 case_WLAN(INVALID_IE);
2704 case_WLAN(MIC_FAILURE);
2705 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2706 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2707 case_WLAN(IE_DIFFERENT);
2708 case_WLAN(INVALID_GROUP_CIPHER);
2709 case_WLAN(INVALID_PAIRWISE_CIPHER);
2710 case_WLAN(INVALID_AKMP);
2711 case_WLAN(UNSUPP_RSN_VERSION);
2712 case_WLAN(INVALID_RSN_IE_CAP);
2713 case_WLAN(IEEE8021X_FAILED);
2714 case_WLAN(CIPHER_SUITE_REJECTED);
2715 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2716 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2717 case_WLAN(DISASSOC_LOW_ACK);
2718 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2719 case_WLAN(QSTA_LEAVE_QBSS);
2720 case_WLAN(QSTA_NOT_USE);
2721 case_WLAN(QSTA_REQUIRE_SETUP);
2722 case_WLAN(QSTA_TIMEOUT);
2723 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2724 case_WLAN(MESH_PEER_CANCELED);
2725 case_WLAN(MESH_MAX_PEERS);
2726 case_WLAN(MESH_CONFIG);
2727 case_WLAN(MESH_CLOSE);
2728 case_WLAN(MESH_MAX_RETRIES);
2729 case_WLAN(MESH_CONFIRM_TIMEOUT);
2730 case_WLAN(MESH_INVALID_GTK);
2731 case_WLAN(MESH_INCONSISTENT_PARAM);
2732 case_WLAN(MESH_INVALID_SECURITY);
2733 case_WLAN(MESH_PATH_ERROR);
2734 case_WLAN(MESH_PATH_NOFORWARD);
2735 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2736 case_WLAN(MAC_EXISTS_IN_MBSS);
2737 case_WLAN(MESH_CHAN_REGULATORY);
2738 case_WLAN(MESH_CHAN);
2739 default: return "<unknown>";
2743 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2744 struct ieee80211_mgmt *mgmt, size_t len)
2746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2747 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2749 sdata_assert_lock(sdata);
2754 if (ifmgd->associated &&
2755 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2756 const u8 *bssid = ifmgd->associated->bssid;
2758 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2760 ieee80211_get_reason_code_string(reason_code));
2762 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2764 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2769 if (ifmgd->assoc_data &&
2770 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2771 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2774 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2776 ieee80211_get_reason_code_string(reason_code));
2778 ieee80211_destroy_assoc_data(sdata, false, true);
2780 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2786 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2787 struct ieee80211_mgmt *mgmt, size_t len)
2789 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2792 sdata_assert_lock(sdata);
2797 if (!ifmgd->associated ||
2798 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2801 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2803 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2804 mgmt->sa, reason_code,
2805 ieee80211_get_reason_code_string(reason_code));
2807 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2809 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2812 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2813 u8 *supp_rates, unsigned int supp_rates_len,
2814 u32 *rates, u32 *basic_rates,
2815 bool *have_higher_than_11mbit,
2816 int *min_rate, int *min_rate_index,
2821 for (i = 0; i < supp_rates_len; i++) {
2822 int rate = supp_rates[i] & 0x7f;
2823 bool is_basic = !!(supp_rates[i] & 0x80);
2825 if ((rate * 5 * (1 << shift)) > 110)
2826 *have_higher_than_11mbit = true;
2829 * Skip HT and VHT BSS membership selectors since they're not
2832 * Note: Even though the membership selector and the basic
2833 * rate flag share the same bit, they are not exactly
2836 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2837 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
2840 for (j = 0; j < sband->n_bitrates; j++) {
2841 struct ieee80211_rate *br;
2844 br = &sband->bitrates[j];
2846 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2847 if (brate == rate) {
2850 *basic_rates |= BIT(j);
2851 if ((rate * 5) < *min_rate) {
2852 *min_rate = rate * 5;
2853 *min_rate_index = j;
2861 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2862 struct cfg80211_bss *cbss,
2863 struct ieee80211_mgmt *mgmt, size_t len)
2865 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2866 struct ieee80211_local *local = sdata->local;
2867 struct ieee80211_supported_band *sband;
2868 struct sta_info *sta;
2870 u16 capab_info, aid;
2871 struct ieee802_11_elems elems;
2872 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2873 const struct cfg80211_bss_ies *bss_ies = NULL;
2874 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2879 /* AssocResp and ReassocResp have identical structure */
2881 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2882 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2884 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2885 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2887 aid &= ~(BIT(15) | BIT(14));
2889 ifmgd->broken_ap = false;
2891 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2892 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2895 ifmgd->broken_ap = true;
2898 pos = mgmt->u.assoc_resp.variable;
2899 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2901 if (!elems.supp_rates) {
2902 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2907 ifmgd->tdls_chan_switch_prohibited =
2908 elems.ext_capab && elems.ext_capab_len >= 5 &&
2909 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2912 * Some APs are erroneously not including some information in their
2913 * (re)association response frames. Try to recover by using the data
2914 * from the beacon or probe response. This seems to afflict mobile
2915 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2916 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2918 if ((assoc_data->wmm && !elems.wmm_param) ||
2919 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2920 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2921 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2922 (!elems.vht_cap_elem || !elems.vht_operation))) {
2923 const struct cfg80211_bss_ies *ies;
2924 struct ieee802_11_elems bss_elems;
2927 ies = rcu_dereference(cbss->ies);
2929 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2935 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2937 if (assoc_data->wmm &&
2938 !elems.wmm_param && bss_elems.wmm_param) {
2939 elems.wmm_param = bss_elems.wmm_param;
2941 "AP bug: WMM param missing from AssocResp\n");
2945 * Also check if we requested HT/VHT, otherwise the AP doesn't
2946 * have to include the IEs in the (re)association response.
2948 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2949 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2950 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2952 "AP bug: HT capability missing from AssocResp\n");
2954 if (!elems.ht_operation && bss_elems.ht_operation &&
2955 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2956 elems.ht_operation = bss_elems.ht_operation;
2958 "AP bug: HT operation missing from AssocResp\n");
2960 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2961 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2962 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2964 "AP bug: VHT capa missing from AssocResp\n");
2966 if (!elems.vht_operation && bss_elems.vht_operation &&
2967 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2968 elems.vht_operation = bss_elems.vht_operation;
2970 "AP bug: VHT operation missing from AssocResp\n");
2975 * We previously checked these in the beacon/probe response, so
2976 * they should be present here. This is just a safety net.
2978 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2979 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2981 "HT AP is missing WMM params or HT capability/operation\n");
2986 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2987 (!elems.vht_cap_elem || !elems.vht_operation)) {
2989 "VHT AP is missing VHT capability/operation\n");
2994 mutex_lock(&sdata->local->sta_mtx);
2996 * station info was already allocated and inserted before
2997 * the association and should be available to us
2999 sta = sta_info_get(sdata, cbss->bssid);
3000 if (WARN_ON(!sta)) {
3001 mutex_unlock(&sdata->local->sta_mtx);
3006 sband = ieee80211_get_sband(sdata);
3008 mutex_unlock(&sdata->local->sta_mtx);
3013 /* Set up internal HT/VHT capabilities */
3014 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3015 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3016 elems.ht_cap_elem, sta);
3018 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3019 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3020 elems.vht_cap_elem, sta);
3023 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3024 * in their association response, so ignore that data for our own
3025 * configuration. If it changed since the last beacon, we'll get the
3026 * next beacon and update then.
3030 * If an operating mode notification IE is present, override the
3031 * NSS calculation (that would be done in rate_control_rate_init())
3032 * and use the # of streams from that element.
3034 if (elems.opmode_notif &&
3035 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3038 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3039 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3041 sta->sta.rx_nss = nss;
3044 rate_control_rate_init(sta);
3046 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3047 set_sta_flag(sta, WLAN_STA_MFP);
3048 sta->sta.mfp = true;
3050 sta->sta.mfp = false;
3053 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3055 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3056 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3057 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3060 "failed to move station %pM to desired state\n",
3062 WARN_ON(__sta_info_destroy(sta));
3063 mutex_unlock(&sdata->local->sta_mtx);
3068 mutex_unlock(&sdata->local->sta_mtx);
3071 * Always handle WMM once after association regardless
3072 * of the first value the AP uses. Setting -1 here has
3073 * that effect because the AP values is an unsigned
3076 ifmgd->wmm_last_param_set = -1;
3078 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3079 ieee80211_set_wmm_default(sdata, false, false);
3080 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3081 elems.wmm_param_len)) {
3082 /* still enable QoS since we might have HT/VHT */
3083 ieee80211_set_wmm_default(sdata, false, true);
3084 /* set the disable-WMM flag in this case to disable
3085 * tracking WMM parameter changes in the beacon if
3086 * the parameters weren't actually valid. Doing so
3087 * avoids changing parameters very strangely when
3088 * the AP is going back and forth between valid and
3089 * invalid parameters.
3091 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3093 changed |= BSS_CHANGED_QOS;
3095 if (elems.max_idle_period_ie) {
3096 bss_conf->max_idle_period =
3097 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3098 bss_conf->protected_keep_alive =
3099 !!(elems.max_idle_period_ie->idle_options &
3100 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3101 changed |= BSS_CHANGED_KEEP_ALIVE;
3103 bss_conf->max_idle_period = 0;
3104 bss_conf->protected_keep_alive = false;
3107 /* set AID and assoc capability,
3108 * ieee80211_set_associated() will tell the driver */
3109 bss_conf->aid = aid;
3110 bss_conf->assoc_capability = capab_info;
3111 ieee80211_set_associated(sdata, cbss, changed);
3114 * If we're using 4-addr mode, let the AP know that we're
3115 * doing so, so that it can create the STA VLAN on its side
3117 if (ifmgd->use_4addr)
3118 ieee80211_send_4addr_nullfunc(local, sdata);
3121 * Start timer to probe the connection to the AP now.
3122 * Also start the timer that will detect beacon loss.
3124 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3125 ieee80211_sta_reset_beacon_monitor(sdata);
3133 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3134 struct ieee80211_mgmt *mgmt,
3137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3138 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3139 u16 capab_info, status_code, aid;
3140 struct ieee802_11_elems elems;
3141 int ac, uapsd_queues = -1;
3144 struct cfg80211_bss *bss;
3145 struct ieee80211_event event = {
3147 .u.mlme.data = ASSOC_EVENT,
3150 sdata_assert_lock(sdata);
3154 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3158 * AssocResp and ReassocResp have identical structure, so process both
3159 * of them in this function.
3165 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3166 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3167 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3168 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3171 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3172 reassoc ? "Rea" : "A", mgmt->sa,
3173 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3175 if (assoc_data->fils_kek_len &&
3176 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3179 pos = mgmt->u.assoc_resp.variable;
3180 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3182 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3183 elems.timeout_int &&
3184 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3186 tu = le32_to_cpu(elems.timeout_int->value);
3187 ms = tu * 1024 / 1000;
3189 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3191 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3192 assoc_data->timeout_started = true;
3193 if (ms > IEEE80211_ASSOC_TIMEOUT)
3194 run_again(sdata, assoc_data->timeout);
3198 bss = assoc_data->bss;
3200 if (status_code != WLAN_STATUS_SUCCESS) {
3201 sdata_info(sdata, "%pM denied association (code=%d)\n",
3202 mgmt->sa, status_code);
3203 ieee80211_destroy_assoc_data(sdata, false, false);
3204 event.u.mlme.status = MLME_DENIED;
3205 event.u.mlme.reason = status_code;
3206 drv_event_callback(sdata->local, sdata, &event);
3208 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3209 /* oops -- internal error -- send timeout for now */
3210 ieee80211_destroy_assoc_data(sdata, false, false);
3211 cfg80211_assoc_timeout(sdata->dev, bss);
3214 event.u.mlme.status = MLME_SUCCESS;
3215 drv_event_callback(sdata->local, sdata, &event);
3216 sdata_info(sdata, "associated\n");
3219 * destroy assoc_data afterwards, as otherwise an idle
3220 * recalc after assoc_data is NULL but before associated
3221 * is set can cause the interface to go idle
3223 ieee80211_destroy_assoc_data(sdata, true, false);
3225 /* get uapsd queues configuration */
3227 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3228 if (sdata->tx_conf[ac].uapsd)
3229 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3232 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3235 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3236 struct ieee80211_mgmt *mgmt, size_t len,
3237 struct ieee80211_rx_status *rx_status,
3238 struct ieee802_11_elems *elems)
3240 struct ieee80211_local *local = sdata->local;
3241 struct ieee80211_bss *bss;
3242 struct ieee80211_channel *channel;
3244 sdata_assert_lock(sdata);
3246 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3250 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3253 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3254 ieee80211_rx_bss_put(local, bss);
3259 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3260 struct sk_buff *skb)
3262 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3263 struct ieee80211_if_managed *ifmgd;
3264 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3265 size_t baselen, len = skb->len;
3266 struct ieee802_11_elems elems;
3268 ifmgd = &sdata->u.mgd;
3270 sdata_assert_lock(sdata);
3272 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3273 return; /* ignore ProbeResp to foreign address */
3275 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3279 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3282 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3284 if (ifmgd->associated &&
3285 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3286 ieee80211_reset_ap_probe(sdata);
3290 * This is the canonical list of information elements we care about,
3291 * the filter code also gives us all changes to the Microsoft OUI
3292 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3293 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3294 * changes to requested client power.
3296 * We implement beacon filtering in software since that means we can
3297 * avoid processing the frame here and in cfg80211, and userspace
3298 * will not be able to tell whether the hardware supports it or not.
3300 * XXX: This list needs to be dynamic -- userspace needs to be able to
3301 * add items it requires. It also needs to be able to tell us to
3302 * look out for other vendor IEs.
3304 static const u64 care_about_ies =
3305 (1ULL << WLAN_EID_COUNTRY) |
3306 (1ULL << WLAN_EID_ERP_INFO) |
3307 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3308 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3309 (1ULL << WLAN_EID_HT_CAPABILITY) |
3310 (1ULL << WLAN_EID_HT_OPERATION) |
3311 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3313 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3314 struct ieee80211_mgmt *mgmt, size_t len,
3315 struct ieee80211_rx_status *rx_status)
3317 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3318 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3320 struct ieee802_11_elems elems;
3321 struct ieee80211_local *local = sdata->local;
3322 struct ieee80211_chanctx_conf *chanctx_conf;
3323 struct ieee80211_channel *chan;
3324 struct sta_info *sta;
3330 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3332 sdata_assert_lock(sdata);
3334 /* Process beacon from the current BSS */
3335 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3340 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3341 if (!chanctx_conf) {
3346 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3350 chan = chanctx_conf->def.chan;
3353 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3354 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3355 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3356 len - baselen, false, &elems);
3358 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3359 if (elems.tim && !elems.parse_error) {
3360 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3361 ifmgd->dtim_period = tim_ie->dtim_period;
3363 ifmgd->have_beacon = true;
3364 ifmgd->assoc_data->need_beacon = false;
3365 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3366 sdata->vif.bss_conf.sync_tsf =
3367 le64_to_cpu(mgmt->u.beacon.timestamp);
3368 sdata->vif.bss_conf.sync_device_ts =
3369 rx_status->device_timestamp;
3371 sdata->vif.bss_conf.sync_dtim_count =
3372 elems.tim->dtim_count;
3374 sdata->vif.bss_conf.sync_dtim_count = 0;
3376 /* continue assoc process */
3377 ifmgd->assoc_data->timeout = jiffies;
3378 ifmgd->assoc_data->timeout_started = true;
3379 run_again(sdata, ifmgd->assoc_data->timeout);
3383 if (!ifmgd->associated ||
3384 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3386 bssid = ifmgd->associated->bssid;
3388 /* Track average RSSI from the Beacon frames of the current AP */
3389 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3390 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3391 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3392 ifmgd->last_cqm_event_signal = 0;
3393 ifmgd->count_beacon_signal = 1;
3394 ifmgd->last_ave_beacon_signal = 0;
3396 ifmgd->count_beacon_signal++;
3399 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3401 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3402 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3403 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3404 int last_sig = ifmgd->last_ave_beacon_signal;
3405 struct ieee80211_event event = {
3410 * if signal crosses either of the boundaries, invoke callback
3411 * with appropriate parameters
3413 if (sig > ifmgd->rssi_max_thold &&
3414 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3415 ifmgd->last_ave_beacon_signal = sig;
3416 event.u.rssi.data = RSSI_EVENT_HIGH;
3417 drv_event_callback(local, sdata, &event);
3418 } else if (sig < ifmgd->rssi_min_thold &&
3419 (last_sig >= ifmgd->rssi_max_thold ||
3421 ifmgd->last_ave_beacon_signal = sig;
3422 event.u.rssi.data = RSSI_EVENT_LOW;
3423 drv_event_callback(local, sdata, &event);
3427 if (bss_conf->cqm_rssi_thold &&
3428 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3429 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3430 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3431 int last_event = ifmgd->last_cqm_event_signal;
3432 int thold = bss_conf->cqm_rssi_thold;
3433 int hyst = bss_conf->cqm_rssi_hyst;
3436 (last_event == 0 || sig < last_event - hyst)) {
3437 ifmgd->last_cqm_event_signal = sig;
3438 ieee80211_cqm_rssi_notify(
3440 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3442 } else if (sig > thold &&
3443 (last_event == 0 || sig > last_event + hyst)) {
3444 ifmgd->last_cqm_event_signal = sig;
3445 ieee80211_cqm_rssi_notify(
3447 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3452 if (bss_conf->cqm_rssi_low &&
3453 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3454 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3455 int last_event = ifmgd->last_cqm_event_signal;
3456 int low = bss_conf->cqm_rssi_low;
3457 int high = bss_conf->cqm_rssi_high;
3460 (last_event == 0 || last_event >= low)) {
3461 ifmgd->last_cqm_event_signal = sig;
3462 ieee80211_cqm_rssi_notify(
3464 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3466 } else if (sig > high &&
3467 (last_event == 0 || last_event <= high)) {
3468 ifmgd->last_cqm_event_signal = sig;
3469 ieee80211_cqm_rssi_notify(
3471 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3476 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3477 mlme_dbg_ratelimited(sdata,
3478 "cancelling AP probe due to a received beacon\n");
3479 ieee80211_reset_ap_probe(sdata);
3483 * Push the beacon loss detection into the future since
3484 * we are processing a beacon from the AP just now.
3486 ieee80211_sta_reset_beacon_monitor(sdata);
3488 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3489 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3490 len - baselen, false, &elems,
3491 care_about_ies, ncrc);
3493 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3494 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3495 if (local->hw.conf.dynamic_ps_timeout > 0) {
3496 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3497 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3498 ieee80211_hw_config(local,
3499 IEEE80211_CONF_CHANGE_PS);
3501 ieee80211_send_nullfunc(local, sdata, false);
3502 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3503 local->pspolling = true;
3506 * Here is assumed that the driver will be
3507 * able to send ps-poll frame and receive a
3508 * response even though power save mode is
3509 * enabled, but some drivers might require
3510 * to disable power save here. This needs
3511 * to be investigated.
3513 ieee80211_send_pspoll(local, sdata);
3517 if (sdata->vif.p2p ||
3518 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3519 struct ieee80211_p2p_noa_attr noa = {};
3522 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3524 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3525 (u8 *) &noa, sizeof(noa));
3527 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3528 /* valid noa_attr and index changed */
3529 sdata->u.mgd.p2p_noa_index = noa.index;
3530 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3531 changed |= BSS_CHANGED_P2P_PS;
3533 * make sure we update all information, the CRC
3534 * mechanism doesn't look at P2P attributes.
3536 ifmgd->beacon_crc_valid = false;
3538 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3539 /* noa_attr not found and we had valid noa_attr before */
3540 sdata->u.mgd.p2p_noa_index = -1;
3541 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3542 changed |= BSS_CHANGED_P2P_PS;
3543 ifmgd->beacon_crc_valid = false;
3547 if (ifmgd->csa_waiting_bcn)
3548 ieee80211_chswitch_post_beacon(sdata);
3551 * Update beacon timing and dtim count on every beacon appearance. This
3552 * will allow the driver to use the most updated values. Do it before
3553 * comparing this one with last received beacon.
3554 * IMPORTANT: These parameters would possibly be out of sync by the time
3555 * the driver will use them. The synchronized view is currently
3556 * guaranteed only in certain callbacks.
3558 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3559 sdata->vif.bss_conf.sync_tsf =
3560 le64_to_cpu(mgmt->u.beacon.timestamp);
3561 sdata->vif.bss_conf.sync_device_ts =
3562 rx_status->device_timestamp;
3564 sdata->vif.bss_conf.sync_dtim_count =
3565 elems.tim->dtim_count;
3567 sdata->vif.bss_conf.sync_dtim_count = 0;
3570 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3572 ifmgd->beacon_crc = ncrc;
3573 ifmgd->beacon_crc_valid = true;
3575 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3577 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3578 rx_status->device_timestamp,
3581 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3582 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3583 elems.wmm_param_len))
3584 changed |= BSS_CHANGED_QOS;
3587 * If we haven't had a beacon before, tell the driver about the
3588 * DTIM period (and beacon timing if desired) now.
3590 if (!ifmgd->have_beacon) {
3591 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3593 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3595 bss_conf->dtim_period = 1;
3597 changed |= BSS_CHANGED_BEACON_INFO;
3598 ifmgd->have_beacon = true;
3600 mutex_lock(&local->iflist_mtx);
3601 ieee80211_recalc_ps(local);
3602 mutex_unlock(&local->iflist_mtx);
3604 ieee80211_recalc_ps_vif(sdata);
3607 if (elems.erp_info) {
3609 erp_value = elems.erp_info[0];
3613 changed |= ieee80211_handle_bss_capability(sdata,
3614 le16_to_cpu(mgmt->u.beacon.capab_info),
3615 erp_valid, erp_value);
3617 mutex_lock(&local->sta_mtx);
3618 sta = sta_info_get(sdata, bssid);
3620 if (ieee80211_config_bw(sdata, sta,
3621 elems.ht_cap_elem, elems.ht_operation,
3622 elems.vht_operation, bssid, &changed)) {
3623 mutex_unlock(&local->sta_mtx);
3625 "failed to follow AP %pM bandwidth change, disconnect\n",
3627 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3628 WLAN_REASON_DEAUTH_LEAVING,
3630 ieee80211_report_disconnect(sdata, deauth_buf,
3631 sizeof(deauth_buf), true,
3632 WLAN_REASON_DEAUTH_LEAVING);
3636 if (sta && elems.opmode_notif)
3637 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3639 mutex_unlock(&local->sta_mtx);
3641 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3643 elems.country_elem_len,
3644 elems.pwr_constr_elem,
3645 elems.cisco_dtpc_elem);
3647 ieee80211_bss_info_change_notify(sdata, changed);
3650 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3651 struct sk_buff *skb)
3653 struct ieee80211_rx_status *rx_status;
3654 struct ieee80211_mgmt *mgmt;
3656 struct ieee802_11_elems elems;
3659 rx_status = (struct ieee80211_rx_status *) skb->cb;
3660 mgmt = (struct ieee80211_mgmt *) skb->data;
3661 fc = le16_to_cpu(mgmt->frame_control);
3665 switch (fc & IEEE80211_FCTL_STYPE) {
3666 case IEEE80211_STYPE_BEACON:
3667 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3669 case IEEE80211_STYPE_PROBE_RESP:
3670 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3672 case IEEE80211_STYPE_AUTH:
3673 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3675 case IEEE80211_STYPE_DEAUTH:
3676 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3678 case IEEE80211_STYPE_DISASSOC:
3679 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3681 case IEEE80211_STYPE_ASSOC_RESP:
3682 case IEEE80211_STYPE_REASSOC_RESP:
3683 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3685 case IEEE80211_STYPE_ACTION:
3686 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3687 ies_len = skb->len -
3688 offsetof(struct ieee80211_mgmt,
3689 u.action.u.chan_switch.variable);
3694 ieee802_11_parse_elems(
3695 mgmt->u.action.u.chan_switch.variable,
3696 ies_len, true, &elems);
3698 if (elems.parse_error)
3701 ieee80211_sta_process_chanswitch(sdata,
3703 rx_status->device_timestamp,
3705 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3706 ies_len = skb->len -
3707 offsetof(struct ieee80211_mgmt,
3708 u.action.u.ext_chan_switch.variable);
3713 ieee802_11_parse_elems(
3714 mgmt->u.action.u.ext_chan_switch.variable,
3715 ies_len, true, &elems);
3717 if (elems.parse_error)
3720 /* for the handling code pretend this was also an IE */
3721 elems.ext_chansw_ie =
3722 &mgmt->u.action.u.ext_chan_switch.data;
3724 ieee80211_sta_process_chanswitch(sdata,
3726 rx_status->device_timestamp,
3731 sdata_unlock(sdata);
3734 static void ieee80211_sta_timer(unsigned long data)
3736 struct ieee80211_sub_if_data *sdata =
3737 (struct ieee80211_sub_if_data *) data;
3739 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3742 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3743 u8 *bssid, u8 reason, bool tx)
3745 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3747 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3750 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3754 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3756 struct ieee80211_local *local = sdata->local;
3757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3758 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3763 sdata_assert_lock(sdata);
3765 if (WARN_ON_ONCE(!auth_data))
3770 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3771 sdata_info(sdata, "authentication with %pM timed out\n",
3772 auth_data->bss->bssid);
3775 * Most likely AP is not in the range so remove the
3776 * bss struct for that AP.
3778 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3783 drv_mgd_prepare_tx(local, sdata);
3785 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3786 auth_data->bss->bssid, auth_data->tries,
3787 IEEE80211_AUTH_MAX_TRIES);
3789 auth_data->expected_transaction = 2;
3791 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3792 trans = auth_data->sae_trans;
3793 status = auth_data->sae_status;
3794 auth_data->expected_transaction = trans;
3797 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3798 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3799 IEEE80211_TX_INTFL_MLME_CONN_TX;
3801 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3802 auth_data->data, auth_data->data_len,
3803 auth_data->bss->bssid,
3804 auth_data->bss->bssid, NULL, 0, 0,
3807 if (tx_flags == 0) {
3808 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3809 auth_data->timeout_started = true;
3810 run_again(sdata, auth_data->timeout);
3812 auth_data->timeout =
3813 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3814 auth_data->timeout_started = true;
3815 run_again(sdata, auth_data->timeout);
3821 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3823 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3824 struct ieee80211_local *local = sdata->local;
3826 sdata_assert_lock(sdata);
3828 assoc_data->tries++;
3829 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3830 sdata_info(sdata, "association with %pM timed out\n",
3831 assoc_data->bss->bssid);
3834 * Most likely AP is not in the range so remove the
3835 * bss struct for that AP.
3837 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3842 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3843 assoc_data->bss->bssid, assoc_data->tries,
3844 IEEE80211_ASSOC_MAX_TRIES);
3845 ieee80211_send_assoc(sdata);
3847 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3848 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3849 assoc_data->timeout_started = true;
3850 run_again(sdata, assoc_data->timeout);
3852 assoc_data->timeout =
3853 round_jiffies_up(jiffies +
3854 IEEE80211_ASSOC_TIMEOUT_LONG);
3855 assoc_data->timeout_started = true;
3856 run_again(sdata, assoc_data->timeout);
3862 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3863 __le16 fc, bool acked)
3865 struct ieee80211_local *local = sdata->local;
3867 sdata->u.mgd.status_fc = fc;
3868 sdata->u.mgd.status_acked = acked;
3869 sdata->u.mgd.status_received = true;
3871 ieee80211_queue_work(&local->hw, &sdata->work);
3874 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3876 struct ieee80211_local *local = sdata->local;
3877 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3881 if (ifmgd->status_received) {
3882 __le16 fc = ifmgd->status_fc;
3883 bool status_acked = ifmgd->status_acked;
3885 ifmgd->status_received = false;
3886 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3888 ifmgd->auth_data->timeout =
3889 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3890 run_again(sdata, ifmgd->auth_data->timeout);
3892 ifmgd->auth_data->timeout = jiffies - 1;
3894 ifmgd->auth_data->timeout_started = true;
3895 } else if (ifmgd->assoc_data &&
3896 (ieee80211_is_assoc_req(fc) ||
3897 ieee80211_is_reassoc_req(fc))) {
3899 ifmgd->assoc_data->timeout =
3900 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3901 run_again(sdata, ifmgd->assoc_data->timeout);
3903 ifmgd->assoc_data->timeout = jiffies - 1;
3905 ifmgd->assoc_data->timeout_started = true;
3909 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3910 time_after(jiffies, ifmgd->auth_data->timeout)) {
3911 if (ifmgd->auth_data->done) {
3913 * ok ... we waited for assoc but userspace didn't,
3914 * so let's just kill the auth data
3916 ieee80211_destroy_auth_data(sdata, false);
3917 } else if (ieee80211_auth(sdata)) {
3919 struct ieee80211_event event = {
3921 .u.mlme.data = AUTH_EVENT,
3922 .u.mlme.status = MLME_TIMEOUT,
3925 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3927 ieee80211_destroy_auth_data(sdata, false);
3929 cfg80211_auth_timeout(sdata->dev, bssid);
3930 drv_event_callback(sdata->local, sdata, &event);
3932 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3933 run_again(sdata, ifmgd->auth_data->timeout);
3935 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3936 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3937 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3938 ieee80211_do_assoc(sdata)) {
3939 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3940 struct ieee80211_event event = {
3942 .u.mlme.data = ASSOC_EVENT,
3943 .u.mlme.status = MLME_TIMEOUT,
3946 ieee80211_destroy_assoc_data(sdata, false, false);
3947 cfg80211_assoc_timeout(sdata->dev, bss);
3948 drv_event_callback(sdata->local, sdata, &event);
3950 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3951 run_again(sdata, ifmgd->assoc_data->timeout);
3953 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3954 ifmgd->associated) {
3958 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3960 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3961 max_tries = max_nullfunc_tries;
3963 max_tries = max_probe_tries;
3965 /* ACK received for nullfunc probing frame */
3966 if (!ifmgd->probe_send_count)
3967 ieee80211_reset_ap_probe(sdata);
3968 else if (ifmgd->nullfunc_failed) {
3969 if (ifmgd->probe_send_count < max_tries) {
3971 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3972 bssid, ifmgd->probe_send_count,
3974 ieee80211_mgd_probe_ap_send(sdata);
3977 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3979 ieee80211_sta_connection_lost(sdata, bssid,
3980 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3983 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3984 run_again(sdata, ifmgd->probe_timeout);
3985 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3987 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3988 bssid, probe_wait_ms);
3989 ieee80211_sta_connection_lost(sdata, bssid,
3990 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3991 } else if (ifmgd->probe_send_count < max_tries) {
3993 "No probe response from AP %pM after %dms, try %d/%i\n",
3994 bssid, probe_wait_ms,
3995 ifmgd->probe_send_count, max_tries);
3996 ieee80211_mgd_probe_ap_send(sdata);
3999 * We actually lost the connection ... or did we?
4003 "No probe response from AP %pM after %dms, disconnecting.\n",
4004 bssid, probe_wait_ms);
4006 ieee80211_sta_connection_lost(sdata, bssid,
4007 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4011 sdata_unlock(sdata);
4014 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4016 struct ieee80211_sub_if_data *sdata =
4017 (struct ieee80211_sub_if_data *) data;
4018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4020 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4023 sdata->u.mgd.connection_loss = false;
4024 ieee80211_queue_work(&sdata->local->hw,
4025 &sdata->u.mgd.beacon_connection_loss_work);
4028 static void ieee80211_sta_conn_mon_timer(unsigned long data)
4030 struct ieee80211_sub_if_data *sdata =
4031 (struct ieee80211_sub_if_data *) data;
4032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4033 struct ieee80211_local *local = sdata->local;
4035 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4038 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4041 static void ieee80211_sta_monitor_work(struct work_struct *work)
4043 struct ieee80211_sub_if_data *sdata =
4044 container_of(work, struct ieee80211_sub_if_data,
4045 u.mgd.monitor_work);
4047 ieee80211_mgd_probe_ap(sdata, false);
4050 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4052 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4053 __ieee80211_stop_poll(sdata);
4055 /* let's probe the connection once */
4056 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4057 ieee80211_queue_work(&sdata->local->hw,
4058 &sdata->u.mgd.monitor_work);
4063 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4066 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4070 if (ifmgd->auth_data || ifmgd->assoc_data) {
4071 const u8 *bssid = ifmgd->auth_data ?
4072 ifmgd->auth_data->bss->bssid :
4073 ifmgd->assoc_data->bss->bssid;
4076 * If we are trying to authenticate / associate while suspending,
4077 * cfg80211 won't know and won't actually abort those attempts,
4078 * thus we need to do that ourselves.
4080 ieee80211_send_deauth_disassoc(sdata, bssid,
4081 IEEE80211_STYPE_DEAUTH,
4082 WLAN_REASON_DEAUTH_LEAVING,
4084 if (ifmgd->assoc_data)
4085 ieee80211_destroy_assoc_data(sdata, false, true);
4086 if (ifmgd->auth_data)
4087 ieee80211_destroy_auth_data(sdata, false);
4088 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4089 IEEE80211_DEAUTH_FRAME_LEN);
4092 /* This is a bit of a hack - we should find a better and more generic
4093 * solution to this. Normally when suspending, cfg80211 will in fact
4094 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4095 * auth (not so important) or assoc (this is the problem) process.
4097 * As a consequence, it can happen that we are in the process of both
4098 * associating and suspending, and receive an association response
4099 * after cfg80211 has checked if it needs to disconnect, but before
4100 * we actually set the flag to drop incoming frames. This will then
4101 * cause the workqueue flush to process the association response in
4102 * the suspend, resulting in a successful association just before it
4103 * tries to remove the interface from the driver, which now though
4104 * has a channel context assigned ... this results in issues.
4106 * To work around this (for now) simply deauth here again if we're
4109 if (ifmgd->associated && !sdata->local->wowlan) {
4111 struct cfg80211_deauth_request req = {
4112 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4116 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4117 ieee80211_mgd_deauth(sdata, &req);
4120 sdata_unlock(sdata);
4123 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4128 if (!ifmgd->associated) {
4129 sdata_unlock(sdata);
4133 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4134 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4135 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4136 ieee80211_sta_connection_lost(sdata,
4137 ifmgd->associated->bssid,
4138 WLAN_REASON_UNSPECIFIED,
4140 sdata_unlock(sdata);
4143 sdata_unlock(sdata);
4147 /* interface setup */
4148 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4150 struct ieee80211_if_managed *ifmgd;
4152 ifmgd = &sdata->u.mgd;
4153 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4154 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4155 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4156 ieee80211_beacon_connection_loss_work);
4157 INIT_WORK(&ifmgd->csa_connection_drop_work,
4158 ieee80211_csa_connection_drop_work);
4159 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4160 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4161 ieee80211_tdls_peer_del_work);
4162 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4163 (unsigned long) sdata);
4164 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4165 (unsigned long) sdata);
4166 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4167 (unsigned long) sdata);
4168 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4169 (unsigned long) sdata);
4170 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4171 ieee80211_sta_handle_tspec_ac_params_wk);
4174 ifmgd->powersave = sdata->wdev.ps;
4175 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4176 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4177 ifmgd->p2p_noa_index = -1;
4179 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4180 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4182 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4184 /* Setup TDLS data */
4185 spin_lock_init(&ifmgd->teardown_lock);
4186 ifmgd->teardown_skb = NULL;
4187 ifmgd->orig_teardown_skb = NULL;
4190 /* scan finished notification */
4191 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4193 struct ieee80211_sub_if_data *sdata;
4195 /* Restart STA timers */
4197 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4198 if (ieee80211_sdata_running(sdata))
4199 ieee80211_restart_sta_timer(sdata);
4204 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4205 struct cfg80211_bss *cbss)
4207 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4208 const u8 *ht_cap_ie, *vht_cap_ie;
4209 const struct ieee80211_ht_cap *ht_cap;
4210 const struct ieee80211_vht_cap *vht_cap;
4213 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4216 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4217 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4218 ht_cap = (void *)(ht_cap_ie + 2);
4219 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4221 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4222 * "Tx Unequal Modulation Supported" fields.
4226 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4229 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4230 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4234 vht_cap = (void *)(vht_cap_ie + 2);
4235 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4236 for (nss = 8; nss > 0; nss--) {
4237 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4238 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4241 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4242 chains = max(chains, nss);
4248 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4249 struct cfg80211_bss *cbss)
4251 struct ieee80211_local *local = sdata->local;
4252 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4253 const struct ieee80211_ht_cap *ht_cap = NULL;
4254 const struct ieee80211_ht_operation *ht_oper = NULL;
4255 const struct ieee80211_vht_operation *vht_oper = NULL;
4256 struct ieee80211_supported_band *sband;
4257 struct cfg80211_chan_def chandef;
4262 sband = local->hw.wiphy->bands[cbss->channel->band];
4264 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4265 IEEE80211_STA_DISABLE_80P80MHZ |
4266 IEEE80211_STA_DISABLE_160MHZ);
4270 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4271 sband->ht_cap.ht_supported) {
4272 const u8 *ht_oper_ie, *ht_cap_ie;
4274 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4275 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4276 ht_oper = (void *)(ht_oper_ie + 2);
4278 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4279 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4280 ht_cap = (void *)(ht_cap_ie + 2);
4283 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4288 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4289 sband->vht_cap.vht_supported) {
4290 const u8 *vht_oper_ie, *vht_cap;
4292 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4293 WLAN_EID_VHT_OPERATION);
4294 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4295 vht_oper = (void *)(vht_oper_ie + 2);
4296 if (vht_oper && !ht_oper) {
4299 "AP advertised VHT without HT, disabling both\n");
4300 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4301 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4304 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4305 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4306 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4311 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4313 for (i = 0; i < sband->n_channels; i++) {
4314 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4315 IEEE80211_CHAN_NO_80MHZ))
4323 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4325 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4327 ht_cap, ht_oper, vht_oper,
4330 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4335 /* will change later if needed */
4336 sdata->smps_mode = IEEE80211_SMPS_OFF;
4338 mutex_lock(&local->mtx);
4340 * If this fails (possibly due to channel context sharing
4341 * on incompatible channels, e.g. 80+80 and 160 sharing the
4342 * same control channel) try to use a smaller bandwidth.
4344 ret = ieee80211_vif_use_channel(sdata, &chandef,
4345 IEEE80211_CHANCTX_SHARED);
4347 /* don't downgrade for 5 and 10 MHz channels, though. */
4348 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4349 chandef.width == NL80211_CHAN_WIDTH_10)
4352 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4353 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4354 ret = ieee80211_vif_use_channel(sdata, &chandef,
4355 IEEE80211_CHANCTX_SHARED);
4358 mutex_unlock(&local->mtx);
4362 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4363 struct cfg80211_bss *cbss, bool assoc,
4366 struct ieee80211_local *local = sdata->local;
4367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4368 struct ieee80211_bss *bss = (void *)cbss->priv;
4369 struct sta_info *new_sta = NULL;
4370 struct ieee80211_supported_band *sband;
4371 bool have_sta = false;
4374 sband = local->hw.wiphy->bands[cbss->channel->band];
4376 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4379 /* If a reconfig is happening, bail out */
4380 if (local->in_reconfig)
4385 have_sta = sta_info_get(sdata, cbss->bssid);
4390 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4396 * Set up the information for the new channel before setting the
4397 * new channel. We can't - completely race-free - change the basic
4398 * rates bitmap and the channel (sband) that it refers to, but if
4399 * we set it up before we at least avoid calling into the driver's
4400 * bss_info_changed() method with invalid information (since we do
4401 * call that from changing the channel - only for IDLE and perhaps
4402 * some others, but ...).
4404 * So to avoid that, just set up all the new information before the
4405 * channel, but tell the driver to apply it only afterwards, since
4406 * it might need the new channel for that.
4409 u32 rates = 0, basic_rates = 0;
4410 bool have_higher_than_11mbit;
4411 int min_rate = INT_MAX, min_rate_index = -1;
4412 const struct cfg80211_bss_ies *ies;
4413 int shift = ieee80211_vif_get_shift(&sdata->vif);
4415 ieee80211_get_rates(sband, bss->supp_rates,
4416 bss->supp_rates_len,
4417 &rates, &basic_rates,
4418 &have_higher_than_11mbit,
4419 &min_rate, &min_rate_index,
4423 * This used to be a workaround for basic rates missing
4424 * in the association response frame. Now that we no
4425 * longer use the basic rates from there, it probably
4426 * doesn't happen any more, but keep the workaround so
4427 * in case some *other* APs are buggy in different ways
4428 * we can connect -- with a warning.
4430 if (!basic_rates && min_rate_index >= 0) {
4432 "No basic rates, using min rate instead\n");
4433 basic_rates = BIT(min_rate_index);
4436 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4437 sdata->vif.bss_conf.basic_rates = basic_rates;
4439 /* cf. IEEE 802.11 9.2.12 */
4440 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4441 have_higher_than_11mbit)
4442 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4444 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4446 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4448 /* set timing information */
4449 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4451 ies = rcu_dereference(cbss->beacon_ies);
4455 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4456 sdata->vif.bss_conf.sync_device_ts =
4457 bss->device_ts_beacon;
4458 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4459 ies->data, ies->len);
4460 if (tim_ie && tim_ie[1] >= 2)
4461 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4463 sdata->vif.bss_conf.sync_dtim_count = 0;
4464 } else if (!ieee80211_hw_check(&sdata->local->hw,
4465 TIMING_BEACON_ONLY)) {
4466 ies = rcu_dereference(cbss->proberesp_ies);
4467 /* must be non-NULL since beacon IEs were NULL */
4468 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4469 sdata->vif.bss_conf.sync_device_ts =
4470 bss->device_ts_presp;
4471 sdata->vif.bss_conf.sync_dtim_count = 0;
4473 sdata->vif.bss_conf.sync_tsf = 0;
4474 sdata->vif.bss_conf.sync_device_ts = 0;
4475 sdata->vif.bss_conf.sync_dtim_count = 0;
4480 if (new_sta || override) {
4481 err = ieee80211_prep_channel(sdata, cbss);
4484 sta_info_free(local, new_sta);
4491 * tell driver about BSSID, basic rates and timing
4492 * this was set up above, before setting the channel
4494 ieee80211_bss_info_change_notify(sdata,
4495 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4496 BSS_CHANGED_BEACON_INT);
4499 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4501 err = sta_info_insert(new_sta);
4505 "failed to insert STA entry for the AP (error %d)\n",
4510 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4512 /* Cancel scan to ensure that nothing interferes with connection */
4513 if (local->scanning)
4514 ieee80211_scan_cancel(local);
4520 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4521 struct cfg80211_auth_request *req)
4523 struct ieee80211_local *local = sdata->local;
4524 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4525 struct ieee80211_mgd_auth_data *auth_data;
4529 /* prepare auth data structure */
4531 switch (req->auth_type) {
4532 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4533 auth_alg = WLAN_AUTH_OPEN;
4535 case NL80211_AUTHTYPE_SHARED_KEY:
4536 if (IS_ERR(local->wep_tx_tfm))
4538 auth_alg = WLAN_AUTH_SHARED_KEY;
4540 case NL80211_AUTHTYPE_FT:
4541 auth_alg = WLAN_AUTH_FT;
4543 case NL80211_AUTHTYPE_NETWORK_EAP:
4544 auth_alg = WLAN_AUTH_LEAP;
4546 case NL80211_AUTHTYPE_SAE:
4547 auth_alg = WLAN_AUTH_SAE;
4549 case NL80211_AUTHTYPE_FILS_SK:
4550 auth_alg = WLAN_AUTH_FILS_SK;
4552 case NL80211_AUTHTYPE_FILS_SK_PFS:
4553 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4555 case NL80211_AUTHTYPE_FILS_PK:
4556 auth_alg = WLAN_AUTH_FILS_PK;
4562 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4563 req->ie_len, GFP_KERNEL);
4567 auth_data->bss = req->bss;
4569 if (req->auth_data_len >= 4) {
4570 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4571 __le16 *pos = (__le16 *) req->auth_data;
4573 auth_data->sae_trans = le16_to_cpu(pos[0]);
4574 auth_data->sae_status = le16_to_cpu(pos[1]);
4576 memcpy(auth_data->data, req->auth_data + 4,
4577 req->auth_data_len - 4);
4578 auth_data->data_len += req->auth_data_len - 4;
4581 if (req->ie && req->ie_len) {
4582 memcpy(&auth_data->data[auth_data->data_len],
4583 req->ie, req->ie_len);
4584 auth_data->data_len += req->ie_len;
4587 if (req->key && req->key_len) {
4588 auth_data->key_len = req->key_len;
4589 auth_data->key_idx = req->key_idx;
4590 memcpy(auth_data->key, req->key, req->key_len);
4593 auth_data->algorithm = auth_alg;
4595 /* try to authenticate/probe */
4597 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4598 ifmgd->assoc_data) {
4603 if (ifmgd->auth_data)
4604 ieee80211_destroy_auth_data(sdata, false);
4606 /* prep auth_data so we don't go into idle on disassoc */
4607 ifmgd->auth_data = auth_data;
4609 if (ifmgd->associated) {
4610 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4613 "disconnect from AP %pM for new auth to %pM\n",
4614 ifmgd->associated->bssid, req->bss->bssid);
4615 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4616 WLAN_REASON_UNSPECIFIED,
4619 ieee80211_report_disconnect(sdata, frame_buf,
4620 sizeof(frame_buf), true,
4621 WLAN_REASON_UNSPECIFIED);
4624 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4626 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4630 err = ieee80211_auth(sdata);
4632 sta_info_destroy_addr(sdata, req->bss->bssid);
4636 /* hold our own reference */
4637 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4641 eth_zero_addr(ifmgd->bssid);
4642 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4643 ifmgd->auth_data = NULL;
4644 mutex_lock(&sdata->local->mtx);
4645 ieee80211_vif_release_channel(sdata);
4646 mutex_unlock(&sdata->local->mtx);
4652 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4653 struct cfg80211_assoc_request *req)
4655 struct ieee80211_local *local = sdata->local;
4656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4657 struct ieee80211_bss *bss = (void *)req->bss->priv;
4658 struct ieee80211_mgd_assoc_data *assoc_data;
4659 const struct cfg80211_bss_ies *beacon_ies;
4660 struct ieee80211_supported_band *sband;
4661 const u8 *ssidie, *ht_ie, *vht_ie;
4663 bool override = false;
4665 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4670 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4676 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4677 assoc_data->ssid_len = ssidie[1];
4680 if (ifmgd->associated) {
4681 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4684 "disconnect from AP %pM for new assoc to %pM\n",
4685 ifmgd->associated->bssid, req->bss->bssid);
4686 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4687 WLAN_REASON_UNSPECIFIED,
4690 ieee80211_report_disconnect(sdata, frame_buf,
4691 sizeof(frame_buf), true,
4692 WLAN_REASON_UNSPECIFIED);
4695 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4700 if (ifmgd->assoc_data) {
4705 if (ifmgd->auth_data) {
4708 /* keep sta info, bssid if matching */
4709 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4710 ieee80211_destroy_auth_data(sdata, match);
4713 /* prepare assoc data */
4715 ifmgd->beacon_crc_valid = false;
4717 assoc_data->wmm = bss->wmm_used &&
4718 (local->hw.queues >= IEEE80211_NUM_ACS);
4721 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4722 * We still associate in non-HT mode (11a/b/g) if any one of these
4723 * ciphers is configured as pairwise.
4724 * We can set this to true for non-11n hardware, that'll be checked
4725 * separately along with the peer capabilities.
4727 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4728 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4729 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4730 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4731 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4732 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4733 netdev_info(sdata->dev,
4734 "disabling HT/VHT due to WEP/TKIP use\n");
4738 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4739 sband = local->hw.wiphy->bands[req->bss->channel->band];
4740 if (!sband->ht_cap.ht_supported ||
4741 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4742 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4743 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4744 if (!bss->wmm_used &&
4745 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4746 netdev_info(sdata->dev,
4747 "disabling HT as WMM/QoS is not supported by the AP\n");
4750 /* disable VHT if we don't support it or the AP doesn't use WMM */
4751 if (!sband->vht_cap.vht_supported ||
4752 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4753 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4754 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4755 if (!bss->wmm_used &&
4756 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4757 netdev_info(sdata->dev,
4758 "disabling VHT as WMM/QoS is not supported by the AP\n");
4761 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4762 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4763 sizeof(ifmgd->ht_capa_mask));
4765 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4766 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4767 sizeof(ifmgd->vht_capa_mask));
4769 if (req->ie && req->ie_len) {
4770 memcpy(assoc_data->ie, req->ie, req->ie_len);
4771 assoc_data->ie_len = req->ie_len;
4774 if (req->fils_kek) {
4775 /* should already be checked in cfg80211 - so warn */
4776 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4780 memcpy(assoc_data->fils_kek, req->fils_kek,
4782 assoc_data->fils_kek_len = req->fils_kek_len;
4785 if (req->fils_nonces)
4786 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4787 2 * FILS_NONCE_LEN);
4789 assoc_data->bss = req->bss;
4791 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4792 if (ifmgd->powersave)
4793 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4795 sdata->smps_mode = IEEE80211_SMPS_OFF;
4797 sdata->smps_mode = ifmgd->req_smps;
4799 assoc_data->capability = req->bss->capability;
4800 assoc_data->supp_rates = bss->supp_rates;
4801 assoc_data->supp_rates_len = bss->supp_rates_len;
4804 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4805 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4806 assoc_data->ap_ht_param =
4807 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4809 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4810 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4811 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4812 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4813 sizeof(struct ieee80211_vht_cap));
4815 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4818 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4819 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4820 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4821 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4823 if (bss->wmm_used && bss->uapsd_supported &&
4824 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4825 assoc_data->uapsd = true;
4826 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4828 assoc_data->uapsd = false;
4829 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4832 if (req->prev_bssid)
4833 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4836 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4837 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4839 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4840 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4843 if (req->flags & ASSOC_REQ_USE_RRM)
4844 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4846 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4848 if (req->crypto.control_port)
4849 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4851 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4853 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4854 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4855 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4858 /* kick off associate process */
4860 ifmgd->assoc_data = assoc_data;
4861 ifmgd->dtim_period = 0;
4862 ifmgd->have_beacon = false;
4864 /* override HT/VHT configuration only if the AP and we support it */
4865 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4866 struct ieee80211_sta_ht_cap sta_ht_cap;
4868 if (req->flags & ASSOC_REQ_DISABLE_HT)
4871 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4872 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4874 /* check for 40 MHz disable override */
4875 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4876 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4877 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4880 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4881 req->flags & ASSOC_REQ_DISABLE_VHT)
4885 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4886 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4887 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4890 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4891 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4893 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4898 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4900 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4903 * Wait up to one beacon interval ...
4904 * should this be more if we miss one?
4906 sdata_info(sdata, "waiting for beacon from %pM\n",
4908 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4909 assoc_data->timeout_started = true;
4910 assoc_data->need_beacon = true;
4911 } else if (beacon_ies) {
4912 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4917 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4918 const struct ieee80211_tim_ie *tim;
4919 tim = (void *)(tim_ie + 2);
4920 ifmgd->dtim_period = tim->dtim_period;
4921 dtim_count = tim->dtim_count;
4923 ifmgd->have_beacon = true;
4924 assoc_data->timeout = jiffies;
4925 assoc_data->timeout_started = true;
4927 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4928 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4929 sdata->vif.bss_conf.sync_device_ts =
4930 bss->device_ts_beacon;
4931 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4934 assoc_data->timeout = jiffies;
4935 assoc_data->timeout_started = true;
4939 run_again(sdata, assoc_data->timeout);
4941 if (bss->corrupt_data) {
4942 char *corrupt_type = "data";
4943 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4944 if (bss->corrupt_data &
4945 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4946 corrupt_type = "beacon and probe response";
4948 corrupt_type = "beacon";
4949 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4950 corrupt_type = "probe response";
4951 sdata_info(sdata, "associating with AP with corrupt %s\n",
4957 eth_zero_addr(ifmgd->bssid);
4958 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4959 ifmgd->assoc_data = NULL;
4965 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4966 struct cfg80211_deauth_request *req)
4968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4969 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4970 bool tx = !req->local_state_change;
4972 if (ifmgd->auth_data &&
4973 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4975 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4976 req->bssid, req->reason_code,
4977 ieee80211_get_reason_code_string(req->reason_code));
4979 drv_mgd_prepare_tx(sdata->local, sdata);
4980 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4981 IEEE80211_STYPE_DEAUTH,
4982 req->reason_code, tx,
4984 ieee80211_destroy_auth_data(sdata, false);
4985 ieee80211_report_disconnect(sdata, frame_buf,
4986 sizeof(frame_buf), true,
4992 if (ifmgd->assoc_data &&
4993 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4995 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4996 req->bssid, req->reason_code,
4997 ieee80211_get_reason_code_string(req->reason_code));
4999 drv_mgd_prepare_tx(sdata->local, sdata);
5000 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5001 IEEE80211_STYPE_DEAUTH,
5002 req->reason_code, tx,
5004 ieee80211_destroy_assoc_data(sdata, false, true);
5005 ieee80211_report_disconnect(sdata, frame_buf,
5006 sizeof(frame_buf), true,
5011 if (ifmgd->associated &&
5012 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5014 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5015 req->bssid, req->reason_code,
5016 ieee80211_get_reason_code_string(req->reason_code));
5018 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5019 req->reason_code, tx, frame_buf);
5020 ieee80211_report_disconnect(sdata, frame_buf,
5021 sizeof(frame_buf), true,
5029 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5030 struct cfg80211_disassoc_request *req)
5032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5034 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5037 * cfg80211 should catch this ... but it's racy since
5038 * we can receive a disassoc frame, process it, hand it
5039 * to cfg80211 while that's in a locked section already
5040 * trying to tell us that the user wants to disconnect.
5042 if (ifmgd->associated != req->bss)
5046 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5047 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5049 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5050 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5051 req->reason_code, !req->local_state_change,
5054 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5060 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5065 * Make sure some work items will not run after this,
5066 * they will not do anything but might not have been
5067 * cancelled when disconnecting.
5069 cancel_work_sync(&ifmgd->monitor_work);
5070 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5071 cancel_work_sync(&ifmgd->request_smps_work);
5072 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5073 cancel_work_sync(&ifmgd->chswitch_work);
5074 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5077 if (ifmgd->assoc_data) {
5078 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5079 ieee80211_destroy_assoc_data(sdata, false, false);
5080 cfg80211_assoc_timeout(sdata->dev, bss);
5082 if (ifmgd->auth_data)
5083 ieee80211_destroy_auth_data(sdata, false);
5084 spin_lock_bh(&ifmgd->teardown_lock);
5085 if (ifmgd->teardown_skb) {
5086 kfree_skb(ifmgd->teardown_skb);
5087 ifmgd->teardown_skb = NULL;
5088 ifmgd->orig_teardown_skb = NULL;
5090 spin_unlock_bh(&ifmgd->teardown_lock);
5091 del_timer_sync(&ifmgd->timer);
5092 sdata_unlock(sdata);
5095 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5096 enum nl80211_cqm_rssi_threshold_event rssi_event,
5100 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5102 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5104 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5106 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5108 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5110 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5112 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5114 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5116 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);