2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2016 Intel Deutschland GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/delay.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/etherdevice.h>
21 #include <linux/moduleparam.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
44 static int max_nullfunc_tries = 2;
45 module_param(max_nullfunc_tries, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49 static int max_probe_tries = 5;
50 module_param(max_probe_tries, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
62 static int beacon_loss_count = 7;
63 module_param(beacon_loss_count, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
77 static int probe_wait_ms = 500;
78 module_param(probe_wait_ms, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
84 * How many Beacon frames need to have been used in average signal strength
85 * before starting to indicate signal change events.
87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90 * We can have multiple work items (and connection probing)
91 * scheduling this timer, but we need to take care to only
92 * reschedule it when it should fire _earlier_ than it was
93 * asked for before, or if it's not pending right now. This
94 * function ensures that. Note that it then is required to
95 * run this function for all timeouts after the first one
96 * has happened -- the work that runs from this timer will
99 static void run_again(struct ieee80211_sub_if_data *sdata,
100 unsigned long timeout)
102 sdata_assert_lock(sdata);
104 if (!timer_pending(&sdata->u.mgd.timer) ||
105 time_before(timeout, sdata->u.mgd.timer.expires))
106 mod_timer(&sdata->u.mgd.timer, timeout);
109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
111 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
114 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
118 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125 if (unlikely(!ifmgd->associated))
128 if (ifmgd->probe_send_count)
129 ifmgd->probe_send_count = 0;
131 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
134 mod_timer(&ifmgd->conn_mon_timer,
135 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
138 static int ecw2cw(int ecw)
140 return (1 << ecw) - 1;
144 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
145 struct ieee80211_supported_band *sband,
146 struct ieee80211_channel *channel,
147 const struct ieee80211_ht_cap *ht_cap,
148 const struct ieee80211_ht_operation *ht_oper,
149 const struct ieee80211_vht_operation *vht_oper,
150 struct cfg80211_chan_def *chandef, bool tracking)
152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
153 struct cfg80211_chan_def vht_chandef;
154 struct ieee80211_sta_ht_cap sta_ht_cap;
157 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
158 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
165 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
170 chandef->width = NL80211_CHAN_WIDTH_20;
172 if (!(ht_cap->cap_info &
173 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
174 ret = IEEE80211_STA_DISABLE_40MHZ;
175 vht_chandef = *chandef;
179 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 /* check that channel matches the right operating channel */
182 if (!tracking && channel->center_freq != ht_cfreq) {
184 * It's possible that some APs are confused here;
185 * Netgear WNDR3700 sometimes reports 4 higher than
186 * the actual channel in association responses, but
187 * since we look at probe response/beacon data here
191 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
192 channel->center_freq, ht_cfreq,
193 ht_oper->primary_chan, channel->band);
194 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
198 /* check 40 MHz support, if we have it */
199 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
200 ieee80211_chandef_ht_oper(ht_oper, chandef);
202 /* 40 MHz (and 80 MHz) must be supported for VHT */
203 ret = IEEE80211_STA_DISABLE_VHT;
204 /* also mark 40 MHz disabled */
205 ret |= IEEE80211_STA_DISABLE_40MHZ;
209 if (!vht_oper || !sband->vht_cap.vht_supported) {
210 ret = IEEE80211_STA_DISABLE_VHT;
214 vht_chandef = *chandef;
215 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
216 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
218 "AP VHT information is invalid, disable VHT\n");
219 ret = IEEE80211_STA_DISABLE_VHT;
223 if (!cfg80211_chandef_valid(&vht_chandef)) {
224 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
226 "AP VHT information is invalid, disable VHT\n");
227 ret = IEEE80211_STA_DISABLE_VHT;
231 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
236 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
237 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
239 "AP VHT information doesn't match HT, disable VHT\n");
240 ret = IEEE80211_STA_DISABLE_VHT;
244 *chandef = vht_chandef;
250 * When tracking the current AP, don't do any further checks if the
251 * new chandef is identical to the one we're currently using for the
252 * connection. This keeps us from playing ping-pong with regulatory,
253 * without it the following can happen (for example):
254 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
255 * - AP advertises regdom US
256 * - CRDA loads regdom US with 80 MHz prohibited (old database)
257 * - the code below detects an unsupported channel, downgrades, and
258 * we disconnect from the AP in the caller
259 * - disconnect causes CRDA to reload world regdomain and the game
261 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
263 * It seems possible that there are still scenarios with CSA or real
264 * bandwidth changes where a this could happen, but those cases are
265 * less common and wouldn't completely prevent using the AP.
268 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
271 /* don't print the message below for VHT mismatch if VHT is disabled */
272 if (ret & IEEE80211_STA_DISABLE_VHT)
273 vht_chandef = *chandef;
276 * Ignore the DISABLED flag when we're already connected and only
277 * tracking the APs beacon for bandwidth changes - otherwise we
278 * might get disconnected here if we connect to an AP, update our
279 * regulatory information based on the AP's country IE and the
280 * information we have is wrong/outdated and disables the channel
281 * that we're actually using for the connection to the AP.
283 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
285 IEEE80211_CHAN_DISABLED)) {
286 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
287 ret = IEEE80211_STA_DISABLE_HT |
288 IEEE80211_STA_DISABLE_VHT;
292 ret |= ieee80211_chandef_downgrade(chandef);
295 if (chandef->width != vht_chandef.width && !tracking)
297 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
299 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
303 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
304 struct sta_info *sta,
305 const struct ieee80211_ht_cap *ht_cap,
306 const struct ieee80211_ht_operation *ht_oper,
307 const struct ieee80211_vht_operation *vht_oper,
308 const u8 *bssid, u32 *changed)
310 struct ieee80211_local *local = sdata->local;
311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
312 struct ieee80211_supported_band *sband;
313 struct ieee80211_channel *chan;
314 struct cfg80211_chan_def chandef;
317 enum ieee80211_sta_rx_bandwidth new_sta_bw;
320 /* if HT was/is disabled, don't track any bandwidth changes */
321 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
324 /* don't check VHT if we associated as non-VHT station */
325 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
328 if (WARN_ON_ONCE(!sta))
332 * if bss configuration changed store the new one -
333 * this may be applicable even if channel is identical
335 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
336 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
337 *changed |= BSS_CHANGED_HT;
338 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
341 chan = sdata->vif.bss_conf.chandef.chan;
342 sband = local->hw.wiphy->bands[chan->band];
344 /* calculate new channel (type) based on HT/VHT operation IEs */
345 flags = ieee80211_determine_chantype(sdata, sband, chan,
346 ht_cap, ht_oper, vht_oper,
350 * Downgrade the new channel if we associated with restricted
351 * capabilities. For example, if we associated as a 20 MHz STA
352 * to a 40 MHz AP (due to regulatory, capabilities or config
353 * reasons) then switching to a 40 MHz channel now won't do us
354 * any good -- we couldn't use it with the AP.
356 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
357 chandef.width == NL80211_CHAN_WIDTH_80P80)
358 flags |= ieee80211_chandef_downgrade(&chandef);
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
360 chandef.width == NL80211_CHAN_WIDTH_160)
361 flags |= ieee80211_chandef_downgrade(&chandef);
362 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
363 chandef.width > NL80211_CHAN_WIDTH_20)
364 flags |= ieee80211_chandef_downgrade(&chandef);
366 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
370 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
371 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
372 chandef.center_freq1, chandef.center_freq2);
374 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
375 IEEE80211_STA_DISABLE_VHT |
376 IEEE80211_STA_DISABLE_40MHZ |
377 IEEE80211_STA_DISABLE_80P80MHZ |
378 IEEE80211_STA_DISABLE_160MHZ)) ||
379 !cfg80211_chandef_valid(&chandef)) {
381 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
386 switch (chandef.width) {
387 case NL80211_CHAN_WIDTH_20_NOHT:
388 case NL80211_CHAN_WIDTH_20:
389 new_sta_bw = IEEE80211_STA_RX_BW_20;
391 case NL80211_CHAN_WIDTH_40:
392 new_sta_bw = IEEE80211_STA_RX_BW_40;
394 case NL80211_CHAN_WIDTH_80:
395 new_sta_bw = IEEE80211_STA_RX_BW_80;
397 case NL80211_CHAN_WIDTH_80P80:
398 case NL80211_CHAN_WIDTH_160:
399 new_sta_bw = IEEE80211_STA_RX_BW_160;
405 if (new_sta_bw > sta->cur_max_bandwidth)
406 new_sta_bw = sta->cur_max_bandwidth;
408 if (new_sta_bw < sta->sta.bandwidth) {
409 sta->sta.bandwidth = new_sta_bw;
410 rate_control_rate_update(local, sband, sta,
411 IEEE80211_RC_BW_CHANGED);
414 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
417 "AP %pM changed bandwidth to incompatible one - disconnect\n",
422 if (new_sta_bw > sta->sta.bandwidth) {
423 sta->sta.bandwidth = new_sta_bw;
424 rate_control_rate_update(local, sband, sta,
425 IEEE80211_RC_BW_CHANGED);
431 /* frame sending functions */
433 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
434 struct sk_buff *skb, u8 ap_ht_param,
435 struct ieee80211_supported_band *sband,
436 struct ieee80211_channel *channel,
437 enum ieee80211_smps_mode smps)
440 u32 flags = channel->flags;
442 struct ieee80211_sta_ht_cap ht_cap;
444 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
446 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
447 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
449 /* determine capability flags */
452 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
453 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
454 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
455 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
456 cap &= ~IEEE80211_HT_CAP_SGI_40;
459 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
460 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
461 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
462 cap &= ~IEEE80211_HT_CAP_SGI_40;
468 * If 40 MHz was disabled associate as though we weren't
469 * capable of 40 MHz -- some broken APs will never fall
470 * back to trying to transmit in 20 MHz.
472 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
473 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
474 cap &= ~IEEE80211_HT_CAP_SGI_40;
477 /* set SM PS mode properly */
478 cap &= ~IEEE80211_HT_CAP_SM_PS;
480 case IEEE80211_SMPS_AUTOMATIC:
481 case IEEE80211_SMPS_NUM_MODES:
483 case IEEE80211_SMPS_OFF:
484 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
485 IEEE80211_HT_CAP_SM_PS_SHIFT;
487 case IEEE80211_SMPS_STATIC:
488 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
489 IEEE80211_HT_CAP_SM_PS_SHIFT;
491 case IEEE80211_SMPS_DYNAMIC:
492 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
493 IEEE80211_HT_CAP_SM_PS_SHIFT;
497 /* reserve and fill IE */
498 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
499 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
502 /* This function determines vht capability flags for the association
504 * Note - the function may set the owner of the MU-MIMO capability
506 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
508 struct ieee80211_supported_band *sband,
509 struct ieee80211_vht_cap *ap_vht_cap)
511 struct ieee80211_local *local = sdata->local;
514 struct ieee80211_sta_vht_cap vht_cap;
515 u32 mask, ap_bf_sts, our_bf_sts;
517 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
519 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
520 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
522 /* determine capability flags */
525 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
526 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
528 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
529 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
530 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
531 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
534 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
535 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
536 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
540 * Some APs apparently get confused if our capabilities are better
541 * than theirs, so restrict what we advertise in the assoc request.
543 if (!(ap_vht_cap->vht_cap_info &
544 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
545 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
546 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
547 else if (!(ap_vht_cap->vht_cap_info &
548 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
549 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
552 * If some other vif is using the MU-MIMO capablity we cannot associate
553 * using MU-MIMO - this will lead to contradictions in the group-id
555 * Ownership is defined since association request, in order to avoid
556 * simultaneous associations with MU-MIMO.
558 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
559 bool disable_mu_mimo = false;
560 struct ieee80211_sub_if_data *other;
562 list_for_each_entry_rcu(other, &local->interfaces, list) {
563 if (other->vif.mu_mimo_owner) {
564 disable_mu_mimo = true;
569 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
571 sdata->vif.mu_mimo_owner = true;
574 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
576 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
577 our_bf_sts = cap & mask;
579 if (ap_bf_sts < our_bf_sts) {
584 /* reserve and fill IE */
585 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
586 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
589 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
591 struct ieee80211_local *local = sdata->local;
592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
593 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
595 struct ieee80211_mgmt *mgmt;
597 size_t offset = 0, noffset;
598 int i, count, rates_len, supp_rates_len, shift;
600 struct ieee80211_supported_band *sband;
601 struct ieee80211_chanctx_conf *chanctx_conf;
602 struct ieee80211_channel *chan;
603 u32 rate_flags, rates = 0;
605 sdata_assert_lock(sdata);
608 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
609 if (WARN_ON(!chanctx_conf)) {
613 chan = chanctx_conf->def.chan;
614 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
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++) {
638 if ((rate_flags & sband->bitrates[i].flags)
646 skb = alloc_skb(local->hw.extra_tx_headroom +
647 sizeof(*mgmt) + /* bit too much but doesn't matter */
648 2 + assoc_data->ssid_len + /* SSID */
649 4 + rates_len + /* (extended) rates */
650 4 + /* power capability */
651 2 + 2 * sband->n_channels + /* supported channels */
652 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
653 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
654 assoc_data->ie_len + /* extra IEs */
660 skb_reserve(skb, local->hw.extra_tx_headroom);
662 capab = WLAN_CAPABILITY_ESS;
664 if (sband->band == IEEE80211_BAND_2GHZ) {
665 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
670 capab |= WLAN_CAPABILITY_PRIVACY;
672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
673 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
677 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
745 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
749 *pos++ = 0; /* min tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
755 /* TODO: get this in reg domain format */
756 pos = skb_put(skb, 2 * sband->n_channels + 2);
757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
758 *pos++ = 2 * sband->n_channels;
759 for (i = 0; i < sband->n_channels; i++) {
760 *pos++ = ieee80211_frequency_to_channel(
761 sband->channels[i].center_freq);
762 *pos++ = 1; /* one channel in the subband*/
766 /* if present, add any custom IEs that go before HT */
767 if (assoc_data->ie_len) {
768 static const u8 before_ht[] = {
771 WLAN_EID_EXT_SUPP_RATES,
772 WLAN_EID_PWR_CAPABILITY,
773 WLAN_EID_SUPPORTED_CHANNELS,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES,
777 WLAN_EID_MOBILITY_DOMAIN,
778 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
779 WLAN_EID_RIC_DATA, /* reassoc only */
780 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
782 static const u8 after_ric[] = {
783 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
784 WLAN_EID_HT_CAPABILITY,
785 WLAN_EID_BSS_COEX_2040,
786 WLAN_EID_EXT_CAPABILITY,
787 WLAN_EID_QOS_TRAFFIC_CAPA,
788 WLAN_EID_TIM_BCAST_REQ,
789 WLAN_EID_INTERWORKING,
790 /* 60GHz doesn't happen right now */
791 WLAN_EID_VHT_CAPABILITY,
792 WLAN_EID_OPMODE_NOTIF,
795 noffset = ieee80211_ie_split_ric(assoc_data->ie,
798 ARRAY_SIZE(before_ht),
800 ARRAY_SIZE(after_ric),
802 pos = skb_put(skb, noffset - offset);
803 memcpy(pos, assoc_data->ie + offset, noffset - offset);
807 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
808 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
809 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
811 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
812 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
813 sband, chan, sdata->smps_mode);
815 /* if present, add any custom IEs that go before VHT */
816 if (assoc_data->ie_len) {
817 static const u8 before_vht[] = {
820 WLAN_EID_EXT_SUPP_RATES,
821 WLAN_EID_PWR_CAPABILITY,
822 WLAN_EID_SUPPORTED_CHANNELS,
825 WLAN_EID_RRM_ENABLED_CAPABILITIES,
826 WLAN_EID_MOBILITY_DOMAIN,
827 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
828 WLAN_EID_HT_CAPABILITY,
829 WLAN_EID_BSS_COEX_2040,
830 WLAN_EID_EXT_CAPABILITY,
831 WLAN_EID_QOS_TRAFFIC_CAPA,
832 WLAN_EID_TIM_BCAST_REQ,
833 WLAN_EID_INTERWORKING,
836 /* RIC already taken above, so no need to handle here anymore */
837 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
838 before_vht, ARRAY_SIZE(before_vht),
840 pos = skb_put(skb, noffset - offset);
841 memcpy(pos, assoc_data->ie + offset, noffset - offset);
845 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
846 ieee80211_add_vht_ie(sdata, skb, sband,
847 &assoc_data->ap_vht_cap);
849 /* if present, add any custom non-vendor IEs that go after HT */
850 if (assoc_data->ie_len) {
851 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
854 pos = skb_put(skb, noffset - offset);
855 memcpy(pos, assoc_data->ie + offset, noffset - offset);
859 if (assoc_data->wmm) {
860 if (assoc_data->uapsd) {
861 qos_info = ifmgd->uapsd_queues;
862 qos_info |= (ifmgd->uapsd_max_sp_len <<
863 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
868 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
871 /* add any remaining custom (i.e. vendor specific here) IEs */
872 if (assoc_data->ie_len) {
873 noffset = assoc_data->ie_len;
874 pos = skb_put(skb, noffset - offset);
875 memcpy(pos, assoc_data->ie + offset, noffset - offset);
878 drv_mgd_prepare_tx(local, sdata);
880 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
881 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
882 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
883 IEEE80211_TX_INTFL_MLME_CONN_TX;
884 ieee80211_tx_skb(sdata, skb);
887 void ieee80211_send_pspoll(struct ieee80211_local *local,
888 struct ieee80211_sub_if_data *sdata)
890 struct ieee80211_pspoll *pspoll;
893 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
897 pspoll = (struct ieee80211_pspoll *) skb->data;
898 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
900 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
901 ieee80211_tx_skb(sdata, skb);
904 void ieee80211_send_nullfunc(struct ieee80211_local *local,
905 struct ieee80211_sub_if_data *sdata,
909 struct ieee80211_hdr_3addr *nullfunc;
910 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
912 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
916 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
918 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
920 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
921 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
923 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
924 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
926 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
927 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
929 ieee80211_tx_skb(sdata, skb);
932 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
933 struct ieee80211_sub_if_data *sdata)
936 struct ieee80211_hdr *nullfunc;
939 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
942 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
946 skb_reserve(skb, local->hw.extra_tx_headroom);
948 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
949 memset(nullfunc, 0, 30);
950 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
951 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
952 nullfunc->frame_control = fc;
953 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
954 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
955 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
956 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
958 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
959 ieee80211_tx_skb(sdata, skb);
962 /* spectrum management related things */
963 static void ieee80211_chswitch_work(struct work_struct *work)
965 struct ieee80211_sub_if_data *sdata =
966 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
967 struct ieee80211_local *local = sdata->local;
968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
971 if (!ieee80211_sdata_running(sdata))
975 mutex_lock(&local->mtx);
976 mutex_lock(&local->chanctx_mtx);
978 if (!ifmgd->associated)
981 if (!sdata->vif.csa_active)
985 * using reservation isn't immediate as it may be deferred until later
986 * with multi-vif. once reservation is complete it will re-schedule the
987 * work with no reserved_chanctx so verify chandef to check if it
988 * completed successfully
991 if (sdata->reserved_chanctx) {
993 * with multi-vif csa driver may call ieee80211_csa_finish()
994 * many times while waiting for other interfaces to use their
997 if (sdata->reserved_ready)
1000 ret = ieee80211_vif_use_reserved_context(sdata);
1003 "failed to use reserved channel context, disconnecting (err=%d)\n",
1005 ieee80211_queue_work(&sdata->local->hw,
1006 &ifmgd->csa_connection_drop_work);
1013 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1014 &sdata->csa_chandef)) {
1016 "failed to finalize channel switch, disconnecting\n");
1017 ieee80211_queue_work(&sdata->local->hw,
1018 &ifmgd->csa_connection_drop_work);
1022 /* XXX: shouldn't really modify cfg80211-owned data! */
1023 ifmgd->associated->channel = sdata->csa_chandef.chan;
1025 ifmgd->csa_waiting_bcn = true;
1027 ieee80211_sta_reset_beacon_monitor(sdata);
1028 ieee80211_sta_reset_conn_monitor(sdata);
1031 mutex_unlock(&local->chanctx_mtx);
1032 mutex_unlock(&local->mtx);
1033 sdata_unlock(sdata);
1036 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1038 struct ieee80211_local *local = sdata->local;
1039 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1042 sdata_assert_lock(sdata);
1044 WARN_ON(!sdata->vif.csa_active);
1046 if (sdata->csa_block_tx) {
1047 ieee80211_wake_vif_queues(local, sdata,
1048 IEEE80211_QUEUE_STOP_REASON_CSA);
1049 sdata->csa_block_tx = false;
1052 sdata->vif.csa_active = false;
1053 ifmgd->csa_waiting_bcn = false;
1055 ret = drv_post_channel_switch(sdata);
1058 "driver post channel switch failed, disconnecting\n");
1059 ieee80211_queue_work(&local->hw,
1060 &ifmgd->csa_connection_drop_work);
1064 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1067 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1069 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1072 trace_api_chswitch_done(sdata, success);
1075 "driver channel switch failed, disconnecting\n");
1076 ieee80211_queue_work(&sdata->local->hw,
1077 &ifmgd->csa_connection_drop_work);
1079 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1082 EXPORT_SYMBOL(ieee80211_chswitch_done);
1084 static void ieee80211_chswitch_timer(unsigned long data)
1086 struct ieee80211_sub_if_data *sdata =
1087 (struct ieee80211_sub_if_data *) data;
1089 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1093 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1094 u64 timestamp, u32 device_timestamp,
1095 struct ieee802_11_elems *elems,
1098 struct ieee80211_local *local = sdata->local;
1099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1100 struct cfg80211_bss *cbss = ifmgd->associated;
1101 struct ieee80211_chanctx_conf *conf;
1102 struct ieee80211_chanctx *chanctx;
1103 enum ieee80211_band current_band;
1104 struct ieee80211_csa_ie csa_ie;
1105 struct ieee80211_channel_switch ch_switch;
1108 sdata_assert_lock(sdata);
1113 if (local->scanning)
1116 /* disregard subsequent announcements if we are already processing */
1117 if (sdata->vif.csa_active)
1120 current_band = cbss->channel->band;
1121 memset(&csa_ie, 0, sizeof(csa_ie));
1122 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1124 ifmgd->associated->bssid, &csa_ie);
1126 ieee80211_queue_work(&local->hw,
1127 &ifmgd->csa_connection_drop_work);
1131 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1132 IEEE80211_CHAN_DISABLED)) {
1134 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1135 ifmgd->associated->bssid,
1136 csa_ie.chandef.chan->center_freq,
1137 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1138 csa_ie.chandef.center_freq2);
1139 ieee80211_queue_work(&local->hw,
1140 &ifmgd->csa_connection_drop_work);
1144 if (cfg80211_chandef_identical(&csa_ie.chandef,
1145 &sdata->vif.bss_conf.chandef)) {
1146 if (ifmgd->csa_ignored_same_chan)
1149 "AP %pM tries to chanswitch to same channel, ignore\n",
1150 ifmgd->associated->bssid);
1151 ifmgd->csa_ignored_same_chan = true;
1156 * Drop all TDLS peers - either we disconnect or move to a different
1157 * channel from this point on. There's no telling what our peer will do.
1158 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1159 * have an incompatible wider chandef.
1161 ieee80211_teardown_tdls_peers(sdata);
1163 mutex_lock(&local->mtx);
1164 mutex_lock(&local->chanctx_mtx);
1165 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1166 lockdep_is_held(&local->chanctx_mtx));
1169 "no channel context assigned to vif?, disconnecting\n");
1170 goto drop_connection;
1173 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1175 if (local->use_chanctx &&
1176 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1178 "driver doesn't support chan-switch with channel contexts\n");
1179 goto drop_connection;
1182 ch_switch.timestamp = timestamp;
1183 ch_switch.device_timestamp = device_timestamp;
1184 ch_switch.block_tx = csa_ie.mode;
1185 ch_switch.chandef = csa_ie.chandef;
1186 ch_switch.count = csa_ie.count;
1188 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1190 "preparing for channel switch failed, disconnecting\n");
1191 goto drop_connection;
1194 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1195 chanctx->mode, false);
1198 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1200 goto drop_connection;
1202 mutex_unlock(&local->chanctx_mtx);
1204 sdata->vif.csa_active = true;
1205 sdata->csa_chandef = csa_ie.chandef;
1206 sdata->csa_block_tx = csa_ie.mode;
1207 ifmgd->csa_ignored_same_chan = false;
1209 if (sdata->csa_block_tx)
1210 ieee80211_stop_vif_queues(local, sdata,
1211 IEEE80211_QUEUE_STOP_REASON_CSA);
1212 mutex_unlock(&local->mtx);
1214 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1217 if (local->ops->channel_switch) {
1218 /* use driver's channel switch callback */
1219 drv_channel_switch(local, sdata, &ch_switch);
1223 /* channel switch handled in software */
1224 if (csa_ie.count <= 1)
1225 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1227 mod_timer(&ifmgd->chswitch_timer,
1228 TU_TO_EXP_TIME((csa_ie.count - 1) *
1229 cbss->beacon_interval));
1232 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1233 mutex_unlock(&local->chanctx_mtx);
1234 mutex_unlock(&local->mtx);
1238 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1239 struct ieee80211_channel *channel,
1240 const u8 *country_ie, u8 country_ie_len,
1241 const u8 *pwr_constr_elem,
1242 int *chan_pwr, int *pwr_reduction)
1244 struct ieee80211_country_ie_triplet *triplet;
1245 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1246 int i, chan_increment;
1247 bool have_chan_pwr = false;
1250 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1253 triplet = (void *)(country_ie + 3);
1254 country_ie_len -= 3;
1256 switch (channel->band) {
1260 case IEEE80211_BAND_2GHZ:
1261 case IEEE80211_BAND_60GHZ:
1264 case IEEE80211_BAND_5GHZ:
1270 while (country_ie_len >= 3) {
1271 u8 first_channel = triplet->chans.first_channel;
1273 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1276 for (i = 0; i < triplet->chans.num_channels; i++) {
1277 if (first_channel + i * chan_increment == chan) {
1278 have_chan_pwr = true;
1279 *chan_pwr = triplet->chans.max_power;
1288 country_ie_len -= 3;
1291 if (have_chan_pwr && pwr_constr_elem)
1292 *pwr_reduction = *pwr_constr_elem;
1296 return have_chan_pwr;
1299 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1300 struct ieee80211_channel *channel,
1301 const u8 *cisco_dtpc_ie,
1304 /* From practical testing, the first data byte of the DTPC element
1305 * seems to contain the requested dBm level, and the CLI on Cisco
1306 * APs clearly state the range is -127 to 127 dBm, which indicates
1307 * a signed byte, although it seemingly never actually goes negative.
1308 * The other byte seems to always be zero.
1310 *pwr_level = (__s8)cisco_dtpc_ie[4];
1313 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1314 struct ieee80211_channel *channel,
1315 struct ieee80211_mgmt *mgmt,
1316 const u8 *country_ie, u8 country_ie_len,
1317 const u8 *pwr_constr_ie,
1318 const u8 *cisco_dtpc_ie)
1320 bool has_80211h_pwr = false, has_cisco_pwr = false;
1321 int chan_pwr = 0, pwr_reduction_80211h = 0;
1322 int pwr_level_cisco, pwr_level_80211h;
1324 __le16 capab = mgmt->u.probe_resp.capab_info;
1327 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1328 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1329 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1330 sdata, channel, country_ie, country_ie_len,
1331 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1333 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1336 if (cisco_dtpc_ie) {
1337 ieee80211_find_cisco_dtpc(
1338 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1339 has_cisco_pwr = true;
1342 if (!has_80211h_pwr && !has_cisco_pwr)
1345 /* If we have both 802.11h and Cisco DTPC, apply both limits
1346 * by picking the smallest of the two power levels advertised.
1348 if (has_80211h_pwr &&
1349 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1350 new_ap_level = pwr_level_80211h;
1352 if (sdata->ap_power_level == new_ap_level)
1356 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1357 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1358 sdata->u.mgd.bssid);
1359 } else { /* has_cisco_pwr is always true here. */
1360 new_ap_level = pwr_level_cisco;
1362 if (sdata->ap_power_level == new_ap_level)
1366 "Limiting TX power to %d dBm as advertised by %pM\n",
1367 pwr_level_cisco, sdata->u.mgd.bssid);
1370 sdata->ap_power_level = new_ap_level;
1371 if (__ieee80211_recalc_txpower(sdata))
1372 return BSS_CHANGED_TXPOWER;
1377 static void ieee80211_enable_ps(struct ieee80211_local *local,
1378 struct ieee80211_sub_if_data *sdata)
1380 struct ieee80211_conf *conf = &local->hw.conf;
1383 * If we are scanning right now then the parameters will
1384 * take effect when scan finishes.
1386 if (local->scanning)
1389 if (conf->dynamic_ps_timeout > 0 &&
1390 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1391 mod_timer(&local->dynamic_ps_timer, jiffies +
1392 msecs_to_jiffies(conf->dynamic_ps_timeout));
1394 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1395 ieee80211_send_nullfunc(local, sdata, true);
1397 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1398 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1401 conf->flags |= IEEE80211_CONF_PS;
1402 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1406 static void ieee80211_change_ps(struct ieee80211_local *local)
1408 struct ieee80211_conf *conf = &local->hw.conf;
1410 if (local->ps_sdata) {
1411 ieee80211_enable_ps(local, local->ps_sdata);
1412 } else if (conf->flags & IEEE80211_CONF_PS) {
1413 conf->flags &= ~IEEE80211_CONF_PS;
1414 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1415 del_timer_sync(&local->dynamic_ps_timer);
1416 cancel_work_sync(&local->dynamic_ps_enable_work);
1420 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1422 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1423 struct sta_info *sta = NULL;
1424 bool authorized = false;
1426 if (!mgd->powersave)
1432 if (!mgd->associated)
1435 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1438 if (!mgd->have_beacon)
1442 sta = sta_info_get(sdata, mgd->bssid);
1444 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1450 /* need to hold RTNL or interface lock */
1451 void ieee80211_recalc_ps(struct ieee80211_local *local)
1453 struct ieee80211_sub_if_data *sdata, *found = NULL;
1457 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1458 local->ps_sdata = NULL;
1462 list_for_each_entry(sdata, &local->interfaces, list) {
1463 if (!ieee80211_sdata_running(sdata))
1465 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1466 /* If an AP vif is found, then disable PS
1467 * by setting the count to zero thereby setting
1473 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1479 if (count == 1 && ieee80211_powersave_allowed(found)) {
1480 u8 dtimper = found->u.mgd.dtim_period;
1483 beaconint_us = ieee80211_tu_to_usec(
1484 found->vif.bss_conf.beacon_int);
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 /* The loop will result in using BK even if it requires
1676 * admission control, such configuration makes no sense
1677 * and we have to transmit somehow - the AC selection
1678 * does the same thing.
1680 if (drv_conf_tx(local, sdata, ac,
1681 &sdata->tx_conf[non_acm_ac]))
1683 "failed to set TX queue parameters for queue %d\n",
1685 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1687 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1688 tx_tspec->time_slice_start + HZ - now + 1);
1690 case TX_TSPEC_ACTION_NONE:
1699 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1701 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1702 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1705 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1707 struct ieee80211_sub_if_data *sdata;
1709 sdata = container_of(work, struct ieee80211_sub_if_data,
1710 u.mgd.tx_tspec_wk.work);
1711 ieee80211_sta_handle_tspec_ac_params(sdata);
1715 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1716 struct ieee80211_sub_if_data *sdata,
1717 const u8 *wmm_param, size_t wmm_param_len)
1719 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1724 u8 uapsd_queues = 0;
1726 if (!local->ops->conf_tx)
1729 if (local->hw.queues < IEEE80211_NUM_ACS)
1735 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1738 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1739 uapsd_queues = ifmgd->uapsd_queues;
1741 count = wmm_param[6] & 0x0f;
1742 if (count == ifmgd->wmm_last_param_set)
1744 ifmgd->wmm_last_param_set = count;
1746 pos = wmm_param + 8;
1747 left = wmm_param_len - 8;
1749 memset(¶ms, 0, sizeof(params));
1752 for (; left >= 4; left -= 4, pos += 4) {
1753 int aci = (pos[0] >> 5) & 0x03;
1754 int acm = (pos[0] >> 4) & 0x01;
1759 ac = IEEE80211_AC_BK;
1761 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1762 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1766 ac = IEEE80211_AC_VI;
1768 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1769 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1773 ac = IEEE80211_AC_VO;
1775 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1776 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1781 ac = IEEE80211_AC_BE;
1783 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1784 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1789 params[ac].aifs = pos[0] & 0x0f;
1791 if (params[ac].aifs < 2) {
1793 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1794 params[ac].aifs, aci);
1795 params[ac].aifs = 2;
1797 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1798 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1799 params[ac].txop = get_unaligned_le16(pos + 2);
1800 params[ac].acm = acm;
1801 params[ac].uapsd = uapsd;
1803 if (params[ac].cw_min > params[ac].cw_max) {
1805 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1806 params[ac].cw_min, params[ac].cw_max, aci);
1811 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1813 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1815 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1816 params[ac].txop, params[ac].uapsd,
1817 ifmgd->tx_tspec[ac].downgraded);
1818 sdata->tx_conf[ac] = params[ac];
1819 if (!ifmgd->tx_tspec[ac].downgraded &&
1820 drv_conf_tx(local, sdata, ac, ¶ms[ac]))
1822 "failed to set TX queue parameters for AC %d\n",
1826 /* enable WMM or activate new settings */
1827 sdata->vif.bss_conf.qos = true;
1831 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1833 lockdep_assert_held(&sdata->local->mtx);
1835 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1836 ieee80211_run_deferred_scan(sdata->local);
1839 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1841 mutex_lock(&sdata->local->mtx);
1842 __ieee80211_stop_poll(sdata);
1843 mutex_unlock(&sdata->local->mtx);
1846 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1847 u16 capab, bool erp_valid, u8 erp)
1849 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1851 bool use_protection;
1852 bool use_short_preamble;
1853 bool use_short_slot;
1856 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1857 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1859 use_protection = false;
1860 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1863 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1864 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1865 use_short_slot = true;
1867 if (use_protection != bss_conf->use_cts_prot) {
1868 bss_conf->use_cts_prot = use_protection;
1869 changed |= BSS_CHANGED_ERP_CTS_PROT;
1872 if (use_short_preamble != bss_conf->use_short_preamble) {
1873 bss_conf->use_short_preamble = use_short_preamble;
1874 changed |= BSS_CHANGED_ERP_PREAMBLE;
1877 if (use_short_slot != bss_conf->use_short_slot) {
1878 bss_conf->use_short_slot = use_short_slot;
1879 changed |= BSS_CHANGED_ERP_SLOT;
1885 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1886 struct cfg80211_bss *cbss,
1887 u32 bss_info_changed)
1889 struct ieee80211_bss *bss = (void *)cbss->priv;
1890 struct ieee80211_local *local = sdata->local;
1891 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1893 bss_info_changed |= BSS_CHANGED_ASSOC;
1894 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1895 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1897 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1898 beacon_loss_count * bss_conf->beacon_int));
1900 sdata->u.mgd.associated = cbss;
1901 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1903 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1905 if (sdata->vif.p2p ||
1906 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
1907 const struct cfg80211_bss_ies *ies;
1910 ies = rcu_dereference(cbss->ies);
1914 ret = cfg80211_get_p2p_attr(
1915 ies->data, ies->len,
1916 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1917 (u8 *) &bss_conf->p2p_noa_attr,
1918 sizeof(bss_conf->p2p_noa_attr));
1920 sdata->u.mgd.p2p_noa_index =
1921 bss_conf->p2p_noa_attr.index;
1922 bss_info_changed |= BSS_CHANGED_P2P_PS;
1928 /* just to be sure */
1929 ieee80211_stop_poll(sdata);
1931 ieee80211_led_assoc(local, 1);
1933 if (sdata->u.mgd.have_beacon) {
1935 * If the AP is buggy we may get here with no DTIM period
1936 * known, so assume it's 1 which is the only safe assumption
1937 * in that case, although if the TIM IE is broken powersave
1938 * probably just won't work at all.
1940 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1941 bss_conf->beacon_rate = bss->beacon_rate;
1942 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1944 bss_conf->beacon_rate = NULL;
1945 bss_conf->dtim_period = 0;
1948 bss_conf->assoc = 1;
1950 /* Tell the driver to monitor connection quality (if supported) */
1951 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1952 bss_conf->cqm_rssi_thold)
1953 bss_info_changed |= BSS_CHANGED_CQM;
1955 /* Enable ARP filtering */
1956 if (bss_conf->arp_addr_cnt)
1957 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1959 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1961 mutex_lock(&local->iflist_mtx);
1962 ieee80211_recalc_ps(local);
1963 mutex_unlock(&local->iflist_mtx);
1965 ieee80211_recalc_smps(sdata);
1966 ieee80211_recalc_ps_vif(sdata);
1968 netif_carrier_on(sdata->dev);
1971 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1972 u16 stype, u16 reason, bool tx,
1975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1976 struct ieee80211_local *local = sdata->local;
1979 sdata_assert_lock(sdata);
1981 if (WARN_ON_ONCE(tx && !frame_buf))
1984 if (WARN_ON(!ifmgd->associated))
1987 ieee80211_stop_poll(sdata);
1989 ifmgd->associated = NULL;
1990 netif_carrier_off(sdata->dev);
1993 * if we want to get out of ps before disassoc (why?) we have
1994 * to do it before sending disassoc, as otherwise the null-packet
1997 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1998 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1999 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2001 local->ps_sdata = NULL;
2003 /* disable per-vif ps */
2004 ieee80211_recalc_ps_vif(sdata);
2006 /* make sure ongoing transmission finishes */
2010 * drop any frame before deauth/disassoc, this can be data or
2011 * management frame. Since we are disconnecting, we should not
2012 * insist sending these frames which can take time and delay
2013 * the disconnection and possible the roaming.
2016 ieee80211_flush_queues(local, sdata, true);
2018 /* deauthenticate/disassociate now */
2019 if (tx || frame_buf)
2020 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2021 reason, tx, frame_buf);
2023 /* flush out frame - make sure the deauth was actually sent */
2025 ieee80211_flush_queues(local, sdata, false);
2027 /* clear bssid only after building the needed mgmt frames */
2028 eth_zero_addr(ifmgd->bssid);
2030 /* remove AP and TDLS peers */
2031 sta_info_flush(sdata);
2033 /* finally reset all BSS / config parameters */
2034 changed |= ieee80211_reset_erp_info(sdata);
2036 ieee80211_led_assoc(local, 0);
2037 changed |= BSS_CHANGED_ASSOC;
2038 sdata->vif.bss_conf.assoc = false;
2040 ifmgd->p2p_noa_index = -1;
2041 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2042 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2044 /* on the next assoc, re-program HT/VHT parameters */
2045 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2046 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2047 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2048 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2050 /* reset MU-MIMO ownership and group data */
2051 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2052 sizeof(sdata->vif.bss_conf.mu_group.membership));
2053 memset(sdata->vif.bss_conf.mu_group.position, 0,
2054 sizeof(sdata->vif.bss_conf.mu_group.position));
2055 changed |= BSS_CHANGED_MU_GROUPS;
2056 sdata->vif.mu_mimo_owner = false;
2058 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2060 del_timer_sync(&local->dynamic_ps_timer);
2061 cancel_work_sync(&local->dynamic_ps_enable_work);
2063 /* Disable ARP filtering */
2064 if (sdata->vif.bss_conf.arp_addr_cnt)
2065 changed |= BSS_CHANGED_ARP_FILTER;
2067 sdata->vif.bss_conf.qos = false;
2068 changed |= BSS_CHANGED_QOS;
2070 /* The BSSID (not really interesting) and HT changed */
2071 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2072 ieee80211_bss_info_change_notify(sdata, changed);
2074 /* disassociated - set to defaults now */
2075 ieee80211_set_wmm_default(sdata, false, false);
2077 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2078 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2079 del_timer_sync(&sdata->u.mgd.timer);
2080 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2082 sdata->vif.bss_conf.dtim_period = 0;
2083 sdata->vif.bss_conf.beacon_rate = NULL;
2085 ifmgd->have_beacon = false;
2088 mutex_lock(&local->mtx);
2089 ieee80211_vif_release_channel(sdata);
2091 sdata->vif.csa_active = false;
2092 ifmgd->csa_waiting_bcn = false;
2093 ifmgd->csa_ignored_same_chan = false;
2094 if (sdata->csa_block_tx) {
2095 ieee80211_wake_vif_queues(local, sdata,
2096 IEEE80211_QUEUE_STOP_REASON_CSA);
2097 sdata->csa_block_tx = false;
2099 mutex_unlock(&local->mtx);
2101 /* existing TX TSPEC sessions no longer exist */
2102 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2103 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2105 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2108 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2109 struct ieee80211_hdr *hdr)
2112 * We can postpone the mgd.timer whenever receiving unicast frames
2113 * from AP because we know that the connection is working both ways
2114 * at that time. But multicast frames (and hence also beacons) must
2115 * be ignored here, because we need to trigger the timer during
2116 * data idle periods for sending the periodic probe request to the
2117 * AP we're connected to.
2119 if (is_multicast_ether_addr(hdr->addr1))
2122 ieee80211_sta_reset_conn_monitor(sdata);
2125 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2128 struct ieee80211_local *local = sdata->local;
2130 mutex_lock(&local->mtx);
2131 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2134 __ieee80211_stop_poll(sdata);
2136 mutex_lock(&local->iflist_mtx);
2137 ieee80211_recalc_ps(local);
2138 mutex_unlock(&local->iflist_mtx);
2140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2144 * We've received a probe response, but are not sure whether
2145 * we have or will be receiving any beacons or data, so let's
2146 * schedule the timers again, just in case.
2148 ieee80211_sta_reset_beacon_monitor(sdata);
2150 mod_timer(&ifmgd->conn_mon_timer,
2151 round_jiffies_up(jiffies +
2152 IEEE80211_CONNECTION_IDLE_TIME));
2154 mutex_unlock(&local->mtx);
2157 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2158 struct ieee80211_hdr *hdr,
2161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2162 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2163 int ac = ieee80211_ac_from_tid(tid);
2164 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2165 unsigned long now = jiffies;
2167 if (likely(!tx_tspec->admitted_time))
2170 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2171 tx_tspec->consumed_tx_time = 0;
2172 tx_tspec->time_slice_start = now;
2174 if (tx_tspec->downgraded) {
2175 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2176 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2180 if (tx_tspec->downgraded)
2183 tx_tspec->consumed_tx_time += tx_time;
2185 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2186 tx_tspec->downgraded = true;
2187 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2188 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2192 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2193 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2195 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2197 if (!ieee80211_is_data(hdr->frame_control))
2200 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2201 sdata->u.mgd.probe_send_count > 0) {
2203 ieee80211_sta_reset_conn_monitor(sdata);
2205 sdata->u.mgd.nullfunc_failed = true;
2206 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2211 ieee80211_sta_reset_conn_monitor(sdata);
2214 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2218 u8 *dst = ifmgd->associated->bssid;
2219 u8 unicast_limit = max(1, max_probe_tries - 3);
2222 * Try sending broadcast probe requests for the last three
2223 * probe requests after the first ones failed since some
2224 * buggy APs only support broadcast probe requests.
2226 if (ifmgd->probe_send_count >= unicast_limit)
2230 * When the hardware reports an accurate Tx ACK status, it's
2231 * better to send a nullfunc frame instead of a probe request,
2232 * as it will kick us off the AP quickly if we aren't associated
2233 * anymore. The timeout will be reset if the frame is ACKed by
2236 ifmgd->probe_send_count++;
2238 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2239 ifmgd->nullfunc_failed = false;
2240 ieee80211_send_nullfunc(sdata->local, sdata, false);
2245 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2246 if (WARN_ON_ONCE(ssid == NULL))
2251 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2252 ssid + 2, ssid_len, NULL,
2253 0, (u32) -1, true, 0,
2254 ifmgd->associated->channel, false);
2258 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2259 run_again(sdata, ifmgd->probe_timeout);
2262 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2265 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2266 bool already = false;
2268 if (!ieee80211_sdata_running(sdata))
2273 if (!ifmgd->associated)
2276 mutex_lock(&sdata->local->mtx);
2278 if (sdata->local->tmp_channel || sdata->local->scanning) {
2279 mutex_unlock(&sdata->local->mtx);
2284 mlme_dbg_ratelimited(sdata,
2285 "detected beacon loss from AP (missed %d beacons) - probing\n",
2288 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2292 * The driver/our work has already reported this event or the
2293 * connection monitoring has kicked in and we have already sent
2294 * a probe request. Or maybe the AP died and the driver keeps
2295 * reporting until we disassociate...
2297 * In either case we have to ignore the current call to this
2298 * function (except for setting the correct probe reason bit)
2299 * because otherwise we would reset the timer every time and
2300 * never check whether we received a probe response!
2302 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2305 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2307 mutex_unlock(&sdata->local->mtx);
2312 mutex_lock(&sdata->local->iflist_mtx);
2313 ieee80211_recalc_ps(sdata->local);
2314 mutex_unlock(&sdata->local->iflist_mtx);
2316 ifmgd->probe_send_count = 0;
2317 ieee80211_mgd_probe_ap_send(sdata);
2319 sdata_unlock(sdata);
2322 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2323 struct ieee80211_vif *vif)
2325 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2327 struct cfg80211_bss *cbss;
2328 struct sk_buff *skb;
2332 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2335 sdata_assert_lock(sdata);
2337 if (ifmgd->associated)
2338 cbss = ifmgd->associated;
2339 else if (ifmgd->auth_data)
2340 cbss = ifmgd->auth_data->bss;
2341 else if (ifmgd->assoc_data)
2342 cbss = ifmgd->assoc_data->bss;
2347 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2348 if (WARN_ON_ONCE(ssid == NULL))
2353 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2354 (u32) -1, cbss->channel,
2361 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2363 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2364 const u8 *buf, size_t len, bool tx,
2367 struct ieee80211_event event = {
2369 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2370 .u.mlme.reason = reason,
2374 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2376 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2378 drv_event_callback(sdata->local, sdata, &event);
2381 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2383 struct ieee80211_local *local = sdata->local;
2384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2385 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2388 if (!ifmgd->associated) {
2389 sdata_unlock(sdata);
2393 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2394 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2396 mutex_lock(&local->mtx);
2397 sdata->vif.csa_active = false;
2398 ifmgd->csa_waiting_bcn = false;
2399 if (sdata->csa_block_tx) {
2400 ieee80211_wake_vif_queues(local, sdata,
2401 IEEE80211_QUEUE_STOP_REASON_CSA);
2402 sdata->csa_block_tx = false;
2404 mutex_unlock(&local->mtx);
2406 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2407 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2409 sdata_unlock(sdata);
2412 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2414 struct ieee80211_sub_if_data *sdata =
2415 container_of(work, struct ieee80211_sub_if_data,
2416 u.mgd.beacon_connection_loss_work);
2417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2419 if (ifmgd->associated)
2420 ifmgd->beacon_loss_count++;
2422 if (ifmgd->connection_loss) {
2423 sdata_info(sdata, "Connection to AP %pM lost\n",
2425 __ieee80211_disconnect(sdata);
2427 ieee80211_mgd_probe_ap(sdata, true);
2431 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2433 struct ieee80211_sub_if_data *sdata =
2434 container_of(work, struct ieee80211_sub_if_data,
2435 u.mgd.csa_connection_drop_work);
2437 __ieee80211_disconnect(sdata);
2440 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2442 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2443 struct ieee80211_hw *hw = &sdata->local->hw;
2445 trace_api_beacon_loss(sdata);
2447 sdata->u.mgd.connection_loss = false;
2448 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2450 EXPORT_SYMBOL(ieee80211_beacon_loss);
2452 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2454 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2455 struct ieee80211_hw *hw = &sdata->local->hw;
2457 trace_api_connection_loss(sdata);
2459 sdata->u.mgd.connection_loss = true;
2460 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2462 EXPORT_SYMBOL(ieee80211_connection_loss);
2465 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2468 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2470 sdata_assert_lock(sdata);
2474 * we are not authenticated yet, the only timer that could be
2475 * running is the timeout for the authentication response which
2476 * which is not relevant anymore.
2478 del_timer_sync(&sdata->u.mgd.timer);
2479 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2481 eth_zero_addr(sdata->u.mgd.bssid);
2482 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2483 sdata->u.mgd.flags = 0;
2484 mutex_lock(&sdata->local->mtx);
2485 ieee80211_vif_release_channel(sdata);
2486 mutex_unlock(&sdata->local->mtx);
2489 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2491 sdata->u.mgd.auth_data = NULL;
2494 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2497 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2499 sdata_assert_lock(sdata);
2503 * we are not associated yet, the only timer that could be
2504 * running is the timeout for the association response which
2505 * which is not relevant anymore.
2507 del_timer_sync(&sdata->u.mgd.timer);
2508 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2510 eth_zero_addr(sdata->u.mgd.bssid);
2511 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2512 sdata->u.mgd.flags = 0;
2513 sdata->vif.mu_mimo_owner = false;
2515 mutex_lock(&sdata->local->mtx);
2516 ieee80211_vif_release_channel(sdata);
2517 mutex_unlock(&sdata->local->mtx);
2521 sdata->u.mgd.assoc_data = NULL;
2524 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2525 struct ieee80211_mgmt *mgmt, size_t len)
2527 struct ieee80211_local *local = sdata->local;
2528 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2530 struct ieee802_11_elems elems;
2533 pos = mgmt->u.auth.variable;
2534 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2535 if (!elems.challenge)
2537 auth_data->expected_transaction = 4;
2538 drv_mgd_prepare_tx(sdata->local, sdata);
2539 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2540 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2541 IEEE80211_TX_INTFL_MLME_CONN_TX;
2542 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2543 elems.challenge - 2, elems.challenge_len + 2,
2544 auth_data->bss->bssid, auth_data->bss->bssid,
2545 auth_data->key, auth_data->key_len,
2546 auth_data->key_idx, tx_flags);
2549 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2550 struct ieee80211_mgmt *mgmt, size_t len)
2552 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2554 u16 auth_alg, auth_transaction, status_code;
2555 struct sta_info *sta;
2556 struct ieee80211_event event = {
2558 .u.mlme.data = AUTH_EVENT,
2561 sdata_assert_lock(sdata);
2566 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2569 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2571 if (!ether_addr_equal(bssid, mgmt->bssid))
2574 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2575 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2576 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2578 if (auth_alg != ifmgd->auth_data->algorithm ||
2579 auth_transaction != ifmgd->auth_data->expected_transaction) {
2580 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2581 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2583 ifmgd->auth_data->expected_transaction);
2587 if (status_code != WLAN_STATUS_SUCCESS) {
2588 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2589 mgmt->sa, status_code);
2590 ieee80211_destroy_auth_data(sdata, false);
2591 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2592 event.u.mlme.status = MLME_DENIED;
2593 event.u.mlme.reason = status_code;
2594 drv_event_callback(sdata->local, sdata, &event);
2598 switch (ifmgd->auth_data->algorithm) {
2599 case WLAN_AUTH_OPEN:
2600 case WLAN_AUTH_LEAP:
2604 case WLAN_AUTH_SHARED_KEY:
2605 if (ifmgd->auth_data->expected_transaction != 4) {
2606 ieee80211_auth_challenge(sdata, mgmt, len);
2607 /* need another frame */
2612 WARN_ONCE(1, "invalid auth alg %d",
2613 ifmgd->auth_data->algorithm);
2617 event.u.mlme.status = MLME_SUCCESS;
2618 drv_event_callback(sdata->local, sdata, &event);
2619 sdata_info(sdata, "authenticated\n");
2620 ifmgd->auth_data->done = true;
2621 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2622 ifmgd->auth_data->timeout_started = true;
2623 run_again(sdata, ifmgd->auth_data->timeout);
2625 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2626 ifmgd->auth_data->expected_transaction != 2) {
2628 * Report auth frame to user space for processing since another
2629 * round of Authentication frames is still needed.
2631 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2635 /* move station state to auth */
2636 mutex_lock(&sdata->local->sta_mtx);
2637 sta = sta_info_get(sdata, bssid);
2639 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2642 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2643 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2646 mutex_unlock(&sdata->local->sta_mtx);
2648 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2651 mutex_unlock(&sdata->local->sta_mtx);
2652 /* ignore frame -- wait for timeout */
2655 #define case_WLAN(type) \
2656 case WLAN_REASON_##type: return #type
2658 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2660 switch (reason_code) {
2661 case_WLAN(UNSPECIFIED);
2662 case_WLAN(PREV_AUTH_NOT_VALID);
2663 case_WLAN(DEAUTH_LEAVING);
2664 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2665 case_WLAN(DISASSOC_AP_BUSY);
2666 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2667 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2668 case_WLAN(DISASSOC_STA_HAS_LEFT);
2669 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2670 case_WLAN(DISASSOC_BAD_POWER);
2671 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2672 case_WLAN(INVALID_IE);
2673 case_WLAN(MIC_FAILURE);
2674 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2675 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2676 case_WLAN(IE_DIFFERENT);
2677 case_WLAN(INVALID_GROUP_CIPHER);
2678 case_WLAN(INVALID_PAIRWISE_CIPHER);
2679 case_WLAN(INVALID_AKMP);
2680 case_WLAN(UNSUPP_RSN_VERSION);
2681 case_WLAN(INVALID_RSN_IE_CAP);
2682 case_WLAN(IEEE8021X_FAILED);
2683 case_WLAN(CIPHER_SUITE_REJECTED);
2684 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2685 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2686 case_WLAN(DISASSOC_LOW_ACK);
2687 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2688 case_WLAN(QSTA_LEAVE_QBSS);
2689 case_WLAN(QSTA_NOT_USE);
2690 case_WLAN(QSTA_REQUIRE_SETUP);
2691 case_WLAN(QSTA_TIMEOUT);
2692 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2693 case_WLAN(MESH_PEER_CANCELED);
2694 case_WLAN(MESH_MAX_PEERS);
2695 case_WLAN(MESH_CONFIG);
2696 case_WLAN(MESH_CLOSE);
2697 case_WLAN(MESH_MAX_RETRIES);
2698 case_WLAN(MESH_CONFIRM_TIMEOUT);
2699 case_WLAN(MESH_INVALID_GTK);
2700 case_WLAN(MESH_INCONSISTENT_PARAM);
2701 case_WLAN(MESH_INVALID_SECURITY);
2702 case_WLAN(MESH_PATH_ERROR);
2703 case_WLAN(MESH_PATH_NOFORWARD);
2704 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2705 case_WLAN(MAC_EXISTS_IN_MBSS);
2706 case_WLAN(MESH_CHAN_REGULATORY);
2707 case_WLAN(MESH_CHAN);
2708 default: return "<unknown>";
2712 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2713 struct ieee80211_mgmt *mgmt, size_t len)
2715 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2716 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2718 sdata_assert_lock(sdata);
2723 if (ifmgd->associated &&
2724 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2725 const u8 *bssid = ifmgd->associated->bssid;
2727 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2729 ieee80211_get_reason_code_string(reason_code));
2731 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2733 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2738 if (ifmgd->assoc_data &&
2739 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2740 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2743 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2745 ieee80211_get_reason_code_string(reason_code));
2747 ieee80211_destroy_assoc_data(sdata, false);
2749 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2755 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2756 struct ieee80211_mgmt *mgmt, size_t len)
2758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2761 sdata_assert_lock(sdata);
2766 if (!ifmgd->associated ||
2767 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2770 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2772 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2773 mgmt->sa, reason_code);
2775 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2777 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2780 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2781 u8 *supp_rates, unsigned int supp_rates_len,
2782 u32 *rates, u32 *basic_rates,
2783 bool *have_higher_than_11mbit,
2784 int *min_rate, int *min_rate_index,
2785 int shift, u32 rate_flags)
2789 for (i = 0; i < supp_rates_len; i++) {
2790 int rate = supp_rates[i] & 0x7f;
2791 bool is_basic = !!(supp_rates[i] & 0x80);
2793 if ((rate * 5 * (1 << shift)) > 110)
2794 *have_higher_than_11mbit = true;
2797 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2798 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2800 * Note: Even through the membership selector and the basic
2801 * rate flag share the same bit, they are not exactly
2804 if (!!(supp_rates[i] & 0x80) &&
2805 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2808 for (j = 0; j < sband->n_bitrates; j++) {
2809 struct ieee80211_rate *br;
2812 br = &sband->bitrates[j];
2813 if ((rate_flags & br->flags) != rate_flags)
2816 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2817 if (brate == rate) {
2820 *basic_rates |= BIT(j);
2821 if ((rate * 5) < *min_rate) {
2822 *min_rate = rate * 5;
2823 *min_rate_index = j;
2831 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2832 struct cfg80211_bss *cbss,
2833 struct ieee80211_mgmt *mgmt, size_t len)
2835 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2836 struct ieee80211_local *local = sdata->local;
2837 struct ieee80211_supported_band *sband;
2838 struct sta_info *sta;
2840 u16 capab_info, aid;
2841 struct ieee802_11_elems elems;
2842 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2843 const struct cfg80211_bss_ies *bss_ies = NULL;
2844 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2849 /* AssocResp and ReassocResp have identical structure */
2851 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2852 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2854 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2855 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2857 aid &= ~(BIT(15) | BIT(14));
2859 ifmgd->broken_ap = false;
2861 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2862 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2865 ifmgd->broken_ap = true;
2868 pos = mgmt->u.assoc_resp.variable;
2869 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2871 if (!elems.supp_rates) {
2872 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2877 ifmgd->tdls_chan_switch_prohibited =
2878 elems.ext_capab && elems.ext_capab_len >= 5 &&
2879 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2882 * Some APs are erroneously not including some information in their
2883 * (re)association response frames. Try to recover by using the data
2884 * from the beacon or probe response. This seems to afflict mobile
2885 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2886 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2888 if ((assoc_data->wmm && !elems.wmm_param) ||
2889 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2890 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2891 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2892 (!elems.vht_cap_elem || !elems.vht_operation))) {
2893 const struct cfg80211_bss_ies *ies;
2894 struct ieee802_11_elems bss_elems;
2897 ies = rcu_dereference(cbss->ies);
2899 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2905 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2907 if (assoc_data->wmm &&
2908 !elems.wmm_param && bss_elems.wmm_param) {
2909 elems.wmm_param = bss_elems.wmm_param;
2911 "AP bug: WMM param missing from AssocResp\n");
2915 * Also check if we requested HT/VHT, otherwise the AP doesn't
2916 * have to include the IEs in the (re)association response.
2918 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2919 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2920 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2922 "AP bug: HT capability missing from AssocResp\n");
2924 if (!elems.ht_operation && bss_elems.ht_operation &&
2925 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2926 elems.ht_operation = bss_elems.ht_operation;
2928 "AP bug: HT operation missing from AssocResp\n");
2930 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2931 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2932 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2934 "AP bug: VHT capa missing from AssocResp\n");
2936 if (!elems.vht_operation && bss_elems.vht_operation &&
2937 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2938 elems.vht_operation = bss_elems.vht_operation;
2940 "AP bug: VHT operation missing from AssocResp\n");
2945 * We previously checked these in the beacon/probe response, so
2946 * they should be present here. This is just a safety net.
2948 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2949 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2951 "HT AP is missing WMM params or HT capability/operation\n");
2956 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2957 (!elems.vht_cap_elem || !elems.vht_operation)) {
2959 "VHT AP is missing VHT capability/operation\n");
2964 mutex_lock(&sdata->local->sta_mtx);
2966 * station info was already allocated and inserted before
2967 * the association and should be available to us
2969 sta = sta_info_get(sdata, cbss->bssid);
2970 if (WARN_ON(!sta)) {
2971 mutex_unlock(&sdata->local->sta_mtx);
2976 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2978 /* Set up internal HT/VHT capabilities */
2979 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2980 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2981 elems.ht_cap_elem, sta);
2983 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2984 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2985 elems.vht_cap_elem, sta);
2988 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2989 * in their association response, so ignore that data for our own
2990 * configuration. If it changed since the last beacon, we'll get the
2991 * next beacon and update then.
2995 * If an operating mode notification IE is present, override the
2996 * NSS calculation (that would be done in rate_control_rate_init())
2997 * and use the # of streams from that element.
2999 if (elems.opmode_notif &&
3000 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3003 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3004 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3006 sta->sta.rx_nss = nss;
3009 rate_control_rate_init(sta);
3011 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3012 set_sta_flag(sta, WLAN_STA_MFP);
3013 sta->sta.mfp = true;
3015 sta->sta.mfp = false;
3018 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3020 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3021 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3022 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3025 "failed to move station %pM to desired state\n",
3027 WARN_ON(__sta_info_destroy(sta));
3028 mutex_unlock(&sdata->local->sta_mtx);
3033 mutex_unlock(&sdata->local->sta_mtx);
3036 * Always handle WMM once after association regardless
3037 * of the first value the AP uses. Setting -1 here has
3038 * that effect because the AP values is an unsigned
3041 ifmgd->wmm_last_param_set = -1;
3043 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3044 ieee80211_set_wmm_default(sdata, false, false);
3045 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3046 elems.wmm_param_len)) {
3047 /* still enable QoS since we might have HT/VHT */
3048 ieee80211_set_wmm_default(sdata, false, true);
3049 /* set the disable-WMM flag in this case to disable
3050 * tracking WMM parameter changes in the beacon if
3051 * the parameters weren't actually valid. Doing so
3052 * avoids changing parameters very strangely when
3053 * the AP is going back and forth between valid and
3054 * invalid parameters.
3056 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3058 changed |= BSS_CHANGED_QOS;
3060 /* set AID and assoc capability,
3061 * ieee80211_set_associated() will tell the driver */
3062 bss_conf->aid = aid;
3063 bss_conf->assoc_capability = capab_info;
3064 ieee80211_set_associated(sdata, cbss, changed);
3067 * If we're using 4-addr mode, let the AP know that we're
3068 * doing so, so that it can create the STA VLAN on its side
3070 if (ifmgd->use_4addr)
3071 ieee80211_send_4addr_nullfunc(local, sdata);
3074 * Start timer to probe the connection to the AP now.
3075 * Also start the timer that will detect beacon loss.
3077 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3078 ieee80211_sta_reset_beacon_monitor(sdata);
3086 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3087 struct ieee80211_mgmt *mgmt,
3090 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3091 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3092 u16 capab_info, status_code, aid;
3093 struct ieee802_11_elems elems;
3094 int ac, uapsd_queues = -1;
3097 struct cfg80211_bss *bss;
3098 struct ieee80211_event event = {
3100 .u.mlme.data = ASSOC_EVENT,
3103 sdata_assert_lock(sdata);
3107 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3111 * AssocResp and ReassocResp have identical structure, so process both
3112 * of them in this function.
3118 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3119 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3120 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3121 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3124 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3125 reassoc ? "Rea" : "A", mgmt->sa,
3126 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3128 pos = mgmt->u.assoc_resp.variable;
3129 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3131 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3132 elems.timeout_int &&
3133 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3135 tu = le32_to_cpu(elems.timeout_int->value);
3136 ms = tu * 1024 / 1000;
3138 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3140 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3141 assoc_data->timeout_started = true;
3142 if (ms > IEEE80211_ASSOC_TIMEOUT)
3143 run_again(sdata, assoc_data->timeout);
3147 bss = assoc_data->bss;
3149 if (status_code != WLAN_STATUS_SUCCESS) {
3150 sdata_info(sdata, "%pM denied association (code=%d)\n",
3151 mgmt->sa, status_code);
3152 ieee80211_destroy_assoc_data(sdata, false);
3153 event.u.mlme.status = MLME_DENIED;
3154 event.u.mlme.reason = status_code;
3155 drv_event_callback(sdata->local, sdata, &event);
3157 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3158 /* oops -- internal error -- send timeout for now */
3159 ieee80211_destroy_assoc_data(sdata, false);
3160 cfg80211_assoc_timeout(sdata->dev, bss);
3163 event.u.mlme.status = MLME_SUCCESS;
3164 drv_event_callback(sdata->local, sdata, &event);
3165 sdata_info(sdata, "associated\n");
3168 * destroy assoc_data afterwards, as otherwise an idle
3169 * recalc after assoc_data is NULL but before associated
3170 * is set can cause the interface to go idle
3172 ieee80211_destroy_assoc_data(sdata, true);
3174 /* get uapsd queues configuration */
3176 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3177 if (sdata->tx_conf[ac].uapsd)
3178 uapsd_queues |= BIT(ac);
3181 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3184 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3185 struct ieee80211_mgmt *mgmt, size_t len,
3186 struct ieee80211_rx_status *rx_status,
3187 struct ieee802_11_elems *elems)
3189 struct ieee80211_local *local = sdata->local;
3190 struct ieee80211_bss *bss;
3191 struct ieee80211_channel *channel;
3193 sdata_assert_lock(sdata);
3195 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3199 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3202 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3203 ieee80211_rx_bss_put(local, bss);
3208 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3209 struct sk_buff *skb)
3211 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3212 struct ieee80211_if_managed *ifmgd;
3213 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3214 size_t baselen, len = skb->len;
3215 struct ieee802_11_elems elems;
3217 ifmgd = &sdata->u.mgd;
3219 sdata_assert_lock(sdata);
3221 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3222 return; /* ignore ProbeResp to foreign address */
3224 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3228 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3231 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3233 if (ifmgd->associated &&
3234 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3235 ieee80211_reset_ap_probe(sdata);
3239 * This is the canonical list of information elements we care about,
3240 * the filter code also gives us all changes to the Microsoft OUI
3241 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3242 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3243 * changes to requested client power.
3245 * We implement beacon filtering in software since that means we can
3246 * avoid processing the frame here and in cfg80211, and userspace
3247 * will not be able to tell whether the hardware supports it or not.
3249 * XXX: This list needs to be dynamic -- userspace needs to be able to
3250 * add items it requires. It also needs to be able to tell us to
3251 * look out for other vendor IEs.
3253 static const u64 care_about_ies =
3254 (1ULL << WLAN_EID_COUNTRY) |
3255 (1ULL << WLAN_EID_ERP_INFO) |
3256 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3257 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3258 (1ULL << WLAN_EID_HT_CAPABILITY) |
3259 (1ULL << WLAN_EID_HT_OPERATION) |
3260 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3262 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3263 struct ieee80211_mgmt *mgmt, size_t len,
3264 struct ieee80211_rx_status *rx_status)
3266 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3267 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3269 struct ieee802_11_elems elems;
3270 struct ieee80211_local *local = sdata->local;
3271 struct ieee80211_chanctx_conf *chanctx_conf;
3272 struct ieee80211_channel *chan;
3273 struct sta_info *sta;
3279 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3281 sdata_assert_lock(sdata);
3283 /* Process beacon from the current BSS */
3284 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3289 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3290 if (!chanctx_conf) {
3295 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3299 chan = chanctx_conf->def.chan;
3302 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3303 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3304 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3305 len - baselen, false, &elems);
3307 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3308 if (elems.tim && !elems.parse_error) {
3309 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3310 ifmgd->dtim_period = tim_ie->dtim_period;
3312 ifmgd->have_beacon = true;
3313 ifmgd->assoc_data->need_beacon = false;
3314 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3315 sdata->vif.bss_conf.sync_tsf =
3316 le64_to_cpu(mgmt->u.beacon.timestamp);
3317 sdata->vif.bss_conf.sync_device_ts =
3318 rx_status->device_timestamp;
3320 sdata->vif.bss_conf.sync_dtim_count =
3321 elems.tim->dtim_count;
3323 sdata->vif.bss_conf.sync_dtim_count = 0;
3325 /* continue assoc process */
3326 ifmgd->assoc_data->timeout = jiffies;
3327 ifmgd->assoc_data->timeout_started = true;
3328 run_again(sdata, ifmgd->assoc_data->timeout);
3332 if (!ifmgd->associated ||
3333 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3335 bssid = ifmgd->associated->bssid;
3337 /* Track average RSSI from the Beacon frames of the current AP */
3338 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3339 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3340 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3341 ifmgd->last_cqm_event_signal = 0;
3342 ifmgd->count_beacon_signal = 1;
3343 ifmgd->last_ave_beacon_signal = 0;
3345 ifmgd->count_beacon_signal++;
3348 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3350 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3351 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3352 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3353 int last_sig = ifmgd->last_ave_beacon_signal;
3354 struct ieee80211_event event = {
3359 * if signal crosses either of the boundaries, invoke callback
3360 * with appropriate parameters
3362 if (sig > ifmgd->rssi_max_thold &&
3363 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3364 ifmgd->last_ave_beacon_signal = sig;
3365 event.u.rssi.data = RSSI_EVENT_HIGH;
3366 drv_event_callback(local, sdata, &event);
3367 } else if (sig < ifmgd->rssi_min_thold &&
3368 (last_sig >= ifmgd->rssi_max_thold ||
3370 ifmgd->last_ave_beacon_signal = sig;
3371 event.u.rssi.data = RSSI_EVENT_LOW;
3372 drv_event_callback(local, sdata, &event);
3376 if (bss_conf->cqm_rssi_thold &&
3377 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3378 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3379 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3380 int last_event = ifmgd->last_cqm_event_signal;
3381 int thold = bss_conf->cqm_rssi_thold;
3382 int hyst = bss_conf->cqm_rssi_hyst;
3385 (last_event == 0 || sig < last_event - hyst)) {
3386 ifmgd->last_cqm_event_signal = sig;
3387 ieee80211_cqm_rssi_notify(
3389 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3391 } else if (sig > thold &&
3392 (last_event == 0 || sig > last_event + hyst)) {
3393 ifmgd->last_cqm_event_signal = sig;
3394 ieee80211_cqm_rssi_notify(
3396 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3401 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3402 mlme_dbg_ratelimited(sdata,
3403 "cancelling AP probe due to a received beacon\n");
3404 ieee80211_reset_ap_probe(sdata);
3408 * Push the beacon loss detection into the future since
3409 * we are processing a beacon from the AP just now.
3411 ieee80211_sta_reset_beacon_monitor(sdata);
3413 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3414 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3415 len - baselen, false, &elems,
3416 care_about_ies, ncrc);
3418 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3419 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3420 if (local->hw.conf.dynamic_ps_timeout > 0) {
3421 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3422 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3423 ieee80211_hw_config(local,
3424 IEEE80211_CONF_CHANGE_PS);
3426 ieee80211_send_nullfunc(local, sdata, false);
3427 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3428 local->pspolling = true;
3431 * Here is assumed that the driver will be
3432 * able to send ps-poll frame and receive a
3433 * response even though power save mode is
3434 * enabled, but some drivers might require
3435 * to disable power save here. This needs
3436 * to be investigated.
3438 ieee80211_send_pspoll(local, sdata);
3442 if (sdata->vif.p2p ||
3443 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3444 struct ieee80211_p2p_noa_attr noa = {};
3447 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3449 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3450 (u8 *) &noa, sizeof(noa));
3452 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3453 /* valid noa_attr and index changed */
3454 sdata->u.mgd.p2p_noa_index = noa.index;
3455 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3456 changed |= BSS_CHANGED_P2P_PS;
3458 * make sure we update all information, the CRC
3459 * mechanism doesn't look at P2P attributes.
3461 ifmgd->beacon_crc_valid = false;
3463 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3464 /* noa_attr not found and we had valid noa_attr before */
3465 sdata->u.mgd.p2p_noa_index = -1;
3466 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3467 changed |= BSS_CHANGED_P2P_PS;
3468 ifmgd->beacon_crc_valid = false;
3472 if (ifmgd->csa_waiting_bcn)
3473 ieee80211_chswitch_post_beacon(sdata);
3476 * Update beacon timing and dtim count on every beacon appearance. This
3477 * will allow the driver to use the most updated values. Do it before
3478 * comparing this one with last received beacon.
3479 * IMPORTANT: These parameters would possibly be out of sync by the time
3480 * the driver will use them. The synchronized view is currently
3481 * guaranteed only in certain callbacks.
3483 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3484 sdata->vif.bss_conf.sync_tsf =
3485 le64_to_cpu(mgmt->u.beacon.timestamp);
3486 sdata->vif.bss_conf.sync_device_ts =
3487 rx_status->device_timestamp;
3489 sdata->vif.bss_conf.sync_dtim_count =
3490 elems.tim->dtim_count;
3492 sdata->vif.bss_conf.sync_dtim_count = 0;
3495 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3497 ifmgd->beacon_crc = ncrc;
3498 ifmgd->beacon_crc_valid = true;
3500 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3502 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3503 rx_status->device_timestamp,
3506 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3507 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3508 elems.wmm_param_len))
3509 changed |= BSS_CHANGED_QOS;
3512 * If we haven't had a beacon before, tell the driver about the
3513 * DTIM period (and beacon timing if desired) now.
3515 if (!ifmgd->have_beacon) {
3516 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3518 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3520 bss_conf->dtim_period = 1;
3522 changed |= BSS_CHANGED_BEACON_INFO;
3523 ifmgd->have_beacon = true;
3525 mutex_lock(&local->iflist_mtx);
3526 ieee80211_recalc_ps(local);
3527 mutex_unlock(&local->iflist_mtx);
3529 ieee80211_recalc_ps_vif(sdata);
3532 if (elems.erp_info) {
3534 erp_value = elems.erp_info[0];
3538 changed |= ieee80211_handle_bss_capability(sdata,
3539 le16_to_cpu(mgmt->u.beacon.capab_info),
3540 erp_valid, erp_value);
3542 mutex_lock(&local->sta_mtx);
3543 sta = sta_info_get(sdata, bssid);
3545 if (ieee80211_config_bw(sdata, sta,
3546 elems.ht_cap_elem, elems.ht_operation,
3547 elems.vht_operation, bssid, &changed)) {
3548 mutex_unlock(&local->sta_mtx);
3550 "failed to follow AP %pM bandwidth change, disconnect\n",
3552 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3553 WLAN_REASON_DEAUTH_LEAVING,
3555 ieee80211_report_disconnect(sdata, deauth_buf,
3556 sizeof(deauth_buf), true,
3557 WLAN_REASON_DEAUTH_LEAVING);
3561 if (sta && elems.opmode_notif)
3562 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3564 mutex_unlock(&local->sta_mtx);
3566 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3568 elems.country_elem_len,
3569 elems.pwr_constr_elem,
3570 elems.cisco_dtpc_elem);
3572 ieee80211_bss_info_change_notify(sdata, changed);
3575 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3576 struct sk_buff *skb)
3578 struct ieee80211_rx_status *rx_status;
3579 struct ieee80211_mgmt *mgmt;
3581 struct ieee802_11_elems elems;
3584 rx_status = (struct ieee80211_rx_status *) skb->cb;
3585 mgmt = (struct ieee80211_mgmt *) skb->data;
3586 fc = le16_to_cpu(mgmt->frame_control);
3590 switch (fc & IEEE80211_FCTL_STYPE) {
3591 case IEEE80211_STYPE_BEACON:
3592 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3594 case IEEE80211_STYPE_PROBE_RESP:
3595 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3597 case IEEE80211_STYPE_AUTH:
3598 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3600 case IEEE80211_STYPE_DEAUTH:
3601 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3603 case IEEE80211_STYPE_DISASSOC:
3604 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3606 case IEEE80211_STYPE_ASSOC_RESP:
3607 case IEEE80211_STYPE_REASSOC_RESP:
3608 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3610 case IEEE80211_STYPE_ACTION:
3611 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3612 ies_len = skb->len -
3613 offsetof(struct ieee80211_mgmt,
3614 u.action.u.chan_switch.variable);
3619 ieee802_11_parse_elems(
3620 mgmt->u.action.u.chan_switch.variable,
3621 ies_len, true, &elems);
3623 if (elems.parse_error)
3626 ieee80211_sta_process_chanswitch(sdata,
3628 rx_status->device_timestamp,
3630 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3631 ies_len = skb->len -
3632 offsetof(struct ieee80211_mgmt,
3633 u.action.u.ext_chan_switch.variable);
3638 ieee802_11_parse_elems(
3639 mgmt->u.action.u.ext_chan_switch.variable,
3640 ies_len, true, &elems);
3642 if (elems.parse_error)
3645 /* for the handling code pretend this was also an IE */
3646 elems.ext_chansw_ie =
3647 &mgmt->u.action.u.ext_chan_switch.data;
3649 ieee80211_sta_process_chanswitch(sdata,
3651 rx_status->device_timestamp,
3656 sdata_unlock(sdata);
3659 static void ieee80211_sta_timer(unsigned long data)
3661 struct ieee80211_sub_if_data *sdata =
3662 (struct ieee80211_sub_if_data *) data;
3664 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3667 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3668 u8 *bssid, u8 reason, bool tx)
3670 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3672 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3675 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3679 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3681 struct ieee80211_local *local = sdata->local;
3682 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3683 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3688 sdata_assert_lock(sdata);
3690 if (WARN_ON_ONCE(!auth_data))
3695 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3696 sdata_info(sdata, "authentication with %pM timed out\n",
3697 auth_data->bss->bssid);
3700 * Most likely AP is not in the range so remove the
3701 * bss struct for that AP.
3703 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3708 drv_mgd_prepare_tx(local, sdata);
3710 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3711 auth_data->bss->bssid, auth_data->tries,
3712 IEEE80211_AUTH_MAX_TRIES);
3714 auth_data->expected_transaction = 2;
3716 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3717 trans = auth_data->sae_trans;
3718 status = auth_data->sae_status;
3719 auth_data->expected_transaction = trans;
3722 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3723 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3724 IEEE80211_TX_INTFL_MLME_CONN_TX;
3726 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3727 auth_data->data, auth_data->data_len,
3728 auth_data->bss->bssid,
3729 auth_data->bss->bssid, NULL, 0, 0,
3732 if (tx_flags == 0) {
3733 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3734 auth_data->timeout_started = true;
3735 run_again(sdata, auth_data->timeout);
3737 auth_data->timeout =
3738 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3739 auth_data->timeout_started = true;
3740 run_again(sdata, auth_data->timeout);
3746 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3748 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3749 struct ieee80211_local *local = sdata->local;
3751 sdata_assert_lock(sdata);
3753 assoc_data->tries++;
3754 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3755 sdata_info(sdata, "association with %pM timed out\n",
3756 assoc_data->bss->bssid);
3759 * Most likely AP is not in the range so remove the
3760 * bss struct for that AP.
3762 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3767 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3768 assoc_data->bss->bssid, assoc_data->tries,
3769 IEEE80211_ASSOC_MAX_TRIES);
3770 ieee80211_send_assoc(sdata);
3772 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3773 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3774 assoc_data->timeout_started = true;
3775 run_again(sdata, assoc_data->timeout);
3777 assoc_data->timeout =
3778 round_jiffies_up(jiffies +
3779 IEEE80211_ASSOC_TIMEOUT_LONG);
3780 assoc_data->timeout_started = true;
3781 run_again(sdata, assoc_data->timeout);
3787 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3788 __le16 fc, bool acked)
3790 struct ieee80211_local *local = sdata->local;
3792 sdata->u.mgd.status_fc = fc;
3793 sdata->u.mgd.status_acked = acked;
3794 sdata->u.mgd.status_received = true;
3796 ieee80211_queue_work(&local->hw, &sdata->work);
3799 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3801 struct ieee80211_local *local = sdata->local;
3802 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3806 if (ifmgd->status_received) {
3807 __le16 fc = ifmgd->status_fc;
3808 bool status_acked = ifmgd->status_acked;
3810 ifmgd->status_received = false;
3811 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3813 ifmgd->auth_data->timeout =
3814 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3815 run_again(sdata, ifmgd->auth_data->timeout);
3817 ifmgd->auth_data->timeout = jiffies - 1;
3819 ifmgd->auth_data->timeout_started = true;
3820 } else if (ifmgd->assoc_data &&
3821 (ieee80211_is_assoc_req(fc) ||
3822 ieee80211_is_reassoc_req(fc))) {
3824 ifmgd->assoc_data->timeout =
3825 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3826 run_again(sdata, ifmgd->assoc_data->timeout);
3828 ifmgd->assoc_data->timeout = jiffies - 1;
3830 ifmgd->assoc_data->timeout_started = true;
3834 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3835 time_after(jiffies, ifmgd->auth_data->timeout)) {
3836 if (ifmgd->auth_data->done) {
3838 * ok ... we waited for assoc but userspace didn't,
3839 * so let's just kill the auth data
3841 ieee80211_destroy_auth_data(sdata, false);
3842 } else if (ieee80211_auth(sdata)) {
3844 struct ieee80211_event event = {
3846 .u.mlme.data = AUTH_EVENT,
3847 .u.mlme.status = MLME_TIMEOUT,
3850 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3852 ieee80211_destroy_auth_data(sdata, false);
3854 cfg80211_auth_timeout(sdata->dev, bssid);
3855 drv_event_callback(sdata->local, sdata, &event);
3857 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3858 run_again(sdata, ifmgd->auth_data->timeout);
3860 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3861 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3862 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3863 ieee80211_do_assoc(sdata)) {
3864 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3865 struct ieee80211_event event = {
3867 .u.mlme.data = ASSOC_EVENT,
3868 .u.mlme.status = MLME_TIMEOUT,
3871 ieee80211_destroy_assoc_data(sdata, false);
3872 cfg80211_assoc_timeout(sdata->dev, bss);
3873 drv_event_callback(sdata->local, sdata, &event);
3875 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3876 run_again(sdata, ifmgd->assoc_data->timeout);
3878 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3879 ifmgd->associated) {
3883 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3885 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3886 max_tries = max_nullfunc_tries;
3888 max_tries = max_probe_tries;
3890 /* ACK received for nullfunc probing frame */
3891 if (!ifmgd->probe_send_count)
3892 ieee80211_reset_ap_probe(sdata);
3893 else if (ifmgd->nullfunc_failed) {
3894 if (ifmgd->probe_send_count < max_tries) {
3896 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3897 bssid, ifmgd->probe_send_count,
3899 ieee80211_mgd_probe_ap_send(sdata);
3902 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3904 ieee80211_sta_connection_lost(sdata, bssid,
3905 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3908 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3909 run_again(sdata, ifmgd->probe_timeout);
3910 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3912 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3913 bssid, probe_wait_ms);
3914 ieee80211_sta_connection_lost(sdata, bssid,
3915 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3916 } else if (ifmgd->probe_send_count < max_tries) {
3918 "No probe response from AP %pM after %dms, try %d/%i\n",
3919 bssid, probe_wait_ms,
3920 ifmgd->probe_send_count, max_tries);
3921 ieee80211_mgd_probe_ap_send(sdata);
3924 * We actually lost the connection ... or did we?
3928 "No probe response from AP %pM after %dms, disconnecting.\n",
3929 bssid, probe_wait_ms);
3931 ieee80211_sta_connection_lost(sdata, bssid,
3932 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3936 sdata_unlock(sdata);
3939 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3941 struct ieee80211_sub_if_data *sdata =
3942 (struct ieee80211_sub_if_data *) data;
3943 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3945 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3948 sdata->u.mgd.connection_loss = false;
3949 ieee80211_queue_work(&sdata->local->hw,
3950 &sdata->u.mgd.beacon_connection_loss_work);
3953 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3955 struct ieee80211_sub_if_data *sdata =
3956 (struct ieee80211_sub_if_data *) data;
3957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3958 struct ieee80211_local *local = sdata->local;
3960 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3963 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3966 static void ieee80211_sta_monitor_work(struct work_struct *work)
3968 struct ieee80211_sub_if_data *sdata =
3969 container_of(work, struct ieee80211_sub_if_data,
3970 u.mgd.monitor_work);
3972 ieee80211_mgd_probe_ap(sdata, false);
3975 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3977 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3978 __ieee80211_stop_poll(sdata);
3980 /* let's probe the connection once */
3981 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3982 ieee80211_queue_work(&sdata->local->hw,
3983 &sdata->u.mgd.monitor_work);
3988 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3991 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3995 if (ifmgd->auth_data || ifmgd->assoc_data) {
3996 const u8 *bssid = ifmgd->auth_data ?
3997 ifmgd->auth_data->bss->bssid :
3998 ifmgd->assoc_data->bss->bssid;
4001 * If we are trying to authenticate / associate while suspending,
4002 * cfg80211 won't know and won't actually abort those attempts,
4003 * thus we need to do that ourselves.
4005 ieee80211_send_deauth_disassoc(sdata, bssid,
4006 IEEE80211_STYPE_DEAUTH,
4007 WLAN_REASON_DEAUTH_LEAVING,
4009 if (ifmgd->assoc_data)
4010 ieee80211_destroy_assoc_data(sdata, false);
4011 if (ifmgd->auth_data)
4012 ieee80211_destroy_auth_data(sdata, false);
4013 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4014 IEEE80211_DEAUTH_FRAME_LEN);
4017 /* This is a bit of a hack - we should find a better and more generic
4018 * solution to this. Normally when suspending, cfg80211 will in fact
4019 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4020 * auth (not so important) or assoc (this is the problem) process.
4022 * As a consequence, it can happen that we are in the process of both
4023 * associating and suspending, and receive an association response
4024 * after cfg80211 has checked if it needs to disconnect, but before
4025 * we actually set the flag to drop incoming frames. This will then
4026 * cause the workqueue flush to process the association response in
4027 * the suspend, resulting in a successful association just before it
4028 * tries to remove the interface from the driver, which now though
4029 * has a channel context assigned ... this results in issues.
4031 * To work around this (for now) simply deauth here again if we're
4034 if (ifmgd->associated && !sdata->local->wowlan) {
4036 struct cfg80211_deauth_request req = {
4037 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4041 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4042 ieee80211_mgd_deauth(sdata, &req);
4045 sdata_unlock(sdata);
4048 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4053 if (!ifmgd->associated) {
4054 sdata_unlock(sdata);
4058 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4059 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4060 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4061 ieee80211_sta_connection_lost(sdata,
4062 ifmgd->associated->bssid,
4063 WLAN_REASON_UNSPECIFIED,
4065 sdata_unlock(sdata);
4068 sdata_unlock(sdata);
4072 /* interface setup */
4073 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4075 struct ieee80211_if_managed *ifmgd;
4077 ifmgd = &sdata->u.mgd;
4078 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4079 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4080 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4081 ieee80211_beacon_connection_loss_work);
4082 INIT_WORK(&ifmgd->csa_connection_drop_work,
4083 ieee80211_csa_connection_drop_work);
4084 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4085 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4086 ieee80211_tdls_peer_del_work);
4087 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4088 (unsigned long) sdata);
4089 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4090 (unsigned long) sdata);
4091 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4092 (unsigned long) sdata);
4093 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4094 (unsigned long) sdata);
4095 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4096 ieee80211_sta_handle_tspec_ac_params_wk);
4099 ifmgd->powersave = sdata->wdev.ps;
4100 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4101 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4102 ifmgd->p2p_noa_index = -1;
4104 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4105 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4107 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4109 /* Setup TDLS data */
4110 spin_lock_init(&ifmgd->teardown_lock);
4111 ifmgd->teardown_skb = NULL;
4112 ifmgd->orig_teardown_skb = NULL;
4115 /* scan finished notification */
4116 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4118 struct ieee80211_sub_if_data *sdata;
4120 /* Restart STA timers */
4122 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4123 if (ieee80211_sdata_running(sdata))
4124 ieee80211_restart_sta_timer(sdata);
4129 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4130 struct cfg80211_bss *cbss)
4132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4133 const u8 *ht_cap_ie, *vht_cap_ie;
4134 const struct ieee80211_ht_cap *ht_cap;
4135 const struct ieee80211_vht_cap *vht_cap;
4138 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4141 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4142 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4143 ht_cap = (void *)(ht_cap_ie + 2);
4144 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4146 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4147 * "Tx Unequal Modulation Supported" fields.
4151 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4154 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4155 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4159 vht_cap = (void *)(vht_cap_ie + 2);
4160 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4161 for (nss = 8; nss > 0; nss--) {
4162 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4163 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4166 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4167 chains = max(chains, nss);
4173 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4174 struct cfg80211_bss *cbss)
4176 struct ieee80211_local *local = sdata->local;
4177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4178 const struct ieee80211_ht_cap *ht_cap = NULL;
4179 const struct ieee80211_ht_operation *ht_oper = NULL;
4180 const struct ieee80211_vht_operation *vht_oper = NULL;
4181 struct ieee80211_supported_band *sband;
4182 struct cfg80211_chan_def chandef;
4187 sband = local->hw.wiphy->bands[cbss->channel->band];
4189 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4190 IEEE80211_STA_DISABLE_80P80MHZ |
4191 IEEE80211_STA_DISABLE_160MHZ);
4195 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4196 sband->ht_cap.ht_supported) {
4197 const u8 *ht_oper_ie, *ht_cap_ie;
4199 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4200 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4201 ht_oper = (void *)(ht_oper_ie + 2);
4203 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4204 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4205 ht_cap = (void *)(ht_cap_ie + 2);
4208 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4213 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4214 sband->vht_cap.vht_supported) {
4215 const u8 *vht_oper_ie, *vht_cap;
4217 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4218 WLAN_EID_VHT_OPERATION);
4219 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4220 vht_oper = (void *)(vht_oper_ie + 2);
4221 if (vht_oper && !ht_oper) {
4224 "AP advertised VHT without HT, disabling both\n");
4225 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4226 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4229 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4230 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4231 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4236 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4238 for (i = 0; i < sband->n_channels; i++) {
4239 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4240 IEEE80211_CHAN_NO_80MHZ))
4248 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4250 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4252 ht_cap, ht_oper, vht_oper,
4255 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4260 /* will change later if needed */
4261 sdata->smps_mode = IEEE80211_SMPS_OFF;
4263 mutex_lock(&local->mtx);
4265 * If this fails (possibly due to channel context sharing
4266 * on incompatible channels, e.g. 80+80 and 160 sharing the
4267 * same control channel) try to use a smaller bandwidth.
4269 ret = ieee80211_vif_use_channel(sdata, &chandef,
4270 IEEE80211_CHANCTX_SHARED);
4272 /* don't downgrade for 5 and 10 MHz channels, though. */
4273 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4274 chandef.width == NL80211_CHAN_WIDTH_10)
4277 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4278 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4279 ret = ieee80211_vif_use_channel(sdata, &chandef,
4280 IEEE80211_CHANCTX_SHARED);
4283 mutex_unlock(&local->mtx);
4287 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4288 struct cfg80211_bss *cbss, bool assoc,
4291 struct ieee80211_local *local = sdata->local;
4292 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4293 struct ieee80211_bss *bss = (void *)cbss->priv;
4294 struct sta_info *new_sta = NULL;
4295 struct ieee80211_supported_band *sband;
4296 bool have_sta = false;
4299 sband = local->hw.wiphy->bands[cbss->channel->band];
4301 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4306 have_sta = sta_info_get(sdata, cbss->bssid);
4311 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4316 if (new_sta || override) {
4317 err = ieee80211_prep_channel(sdata, cbss);
4320 sta_info_free(local, new_sta);
4326 u32 rates = 0, basic_rates = 0;
4327 bool have_higher_than_11mbit;
4328 int min_rate = INT_MAX, min_rate_index = -1;
4329 struct ieee80211_chanctx_conf *chanctx_conf;
4330 const struct cfg80211_bss_ies *ies;
4331 int shift = ieee80211_vif_get_shift(&sdata->vif);
4335 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4336 if (WARN_ON(!chanctx_conf)) {
4338 sta_info_free(local, new_sta);
4341 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4344 ieee80211_get_rates(sband, bss->supp_rates,
4345 bss->supp_rates_len,
4346 &rates, &basic_rates,
4347 &have_higher_than_11mbit,
4348 &min_rate, &min_rate_index,
4352 * This used to be a workaround for basic rates missing
4353 * in the association response frame. Now that we no
4354 * longer use the basic rates from there, it probably
4355 * doesn't happen any more, but keep the workaround so
4356 * in case some *other* APs are buggy in different ways
4357 * we can connect -- with a warning.
4359 if (!basic_rates && min_rate_index >= 0) {
4361 "No basic rates, using min rate instead\n");
4362 basic_rates = BIT(min_rate_index);
4365 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4366 sdata->vif.bss_conf.basic_rates = basic_rates;
4368 /* cf. IEEE 802.11 9.2.12 */
4369 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4370 have_higher_than_11mbit)
4371 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4373 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4375 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4377 /* set timing information */
4378 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4380 ies = rcu_dereference(cbss->beacon_ies);
4384 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4385 sdata->vif.bss_conf.sync_device_ts =
4386 bss->device_ts_beacon;
4387 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4388 ies->data, ies->len);
4389 if (tim_ie && tim_ie[1] >= 2)
4390 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4392 sdata->vif.bss_conf.sync_dtim_count = 0;
4393 } else if (!ieee80211_hw_check(&sdata->local->hw,
4394 TIMING_BEACON_ONLY)) {
4395 ies = rcu_dereference(cbss->proberesp_ies);
4396 /* must be non-NULL since beacon IEs were NULL */
4397 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4398 sdata->vif.bss_conf.sync_device_ts =
4399 bss->device_ts_presp;
4400 sdata->vif.bss_conf.sync_dtim_count = 0;
4402 sdata->vif.bss_conf.sync_tsf = 0;
4403 sdata->vif.bss_conf.sync_device_ts = 0;
4404 sdata->vif.bss_conf.sync_dtim_count = 0;
4408 /* tell driver about BSSID, basic rates and timing */
4409 ieee80211_bss_info_change_notify(sdata,
4410 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4411 BSS_CHANGED_BEACON_INT);
4414 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4416 err = sta_info_insert(new_sta);
4420 "failed to insert STA entry for the AP (error %d)\n",
4425 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4427 /* Cancel scan to ensure that nothing interferes with connection */
4428 if (local->scanning)
4429 ieee80211_scan_cancel(local);
4435 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4436 struct cfg80211_auth_request *req)
4438 struct ieee80211_local *local = sdata->local;
4439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4440 struct ieee80211_mgd_auth_data *auth_data;
4444 /* prepare auth data structure */
4446 switch (req->auth_type) {
4447 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4448 auth_alg = WLAN_AUTH_OPEN;
4450 case NL80211_AUTHTYPE_SHARED_KEY:
4451 if (IS_ERR(local->wep_tx_tfm))
4453 auth_alg = WLAN_AUTH_SHARED_KEY;
4455 case NL80211_AUTHTYPE_FT:
4456 auth_alg = WLAN_AUTH_FT;
4458 case NL80211_AUTHTYPE_NETWORK_EAP:
4459 auth_alg = WLAN_AUTH_LEAP;
4461 case NL80211_AUTHTYPE_SAE:
4462 auth_alg = WLAN_AUTH_SAE;
4468 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4469 req->ie_len, GFP_KERNEL);
4473 auth_data->bss = req->bss;
4475 if (req->sae_data_len >= 4) {
4476 __le16 *pos = (__le16 *) req->sae_data;
4477 auth_data->sae_trans = le16_to_cpu(pos[0]);
4478 auth_data->sae_status = le16_to_cpu(pos[1]);
4479 memcpy(auth_data->data, req->sae_data + 4,
4480 req->sae_data_len - 4);
4481 auth_data->data_len += req->sae_data_len - 4;
4484 if (req->ie && req->ie_len) {
4485 memcpy(&auth_data->data[auth_data->data_len],
4486 req->ie, req->ie_len);
4487 auth_data->data_len += req->ie_len;
4490 if (req->key && req->key_len) {
4491 auth_data->key_len = req->key_len;
4492 auth_data->key_idx = req->key_idx;
4493 memcpy(auth_data->key, req->key, req->key_len);
4496 auth_data->algorithm = auth_alg;
4498 /* try to authenticate/probe */
4500 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4501 ifmgd->assoc_data) {
4506 if (ifmgd->auth_data)
4507 ieee80211_destroy_auth_data(sdata, false);
4509 /* prep auth_data so we don't go into idle on disassoc */
4510 ifmgd->auth_data = auth_data;
4512 if (ifmgd->associated) {
4513 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4516 "disconnect from AP %pM for new auth to %pM\n",
4517 ifmgd->associated->bssid, req->bss->bssid);
4518 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4519 WLAN_REASON_UNSPECIFIED,
4522 ieee80211_report_disconnect(sdata, frame_buf,
4523 sizeof(frame_buf), true,
4524 WLAN_REASON_UNSPECIFIED);
4527 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4529 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4533 err = ieee80211_auth(sdata);
4535 sta_info_destroy_addr(sdata, req->bss->bssid);
4539 /* hold our own reference */
4540 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4544 eth_zero_addr(ifmgd->bssid);
4545 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4546 ifmgd->auth_data = NULL;
4547 mutex_lock(&sdata->local->mtx);
4548 ieee80211_vif_release_channel(sdata);
4549 mutex_unlock(&sdata->local->mtx);
4555 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4556 struct cfg80211_assoc_request *req)
4558 struct ieee80211_local *local = sdata->local;
4559 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4560 struct ieee80211_bss *bss = (void *)req->bss->priv;
4561 struct ieee80211_mgd_assoc_data *assoc_data;
4562 const struct cfg80211_bss_ies *beacon_ies;
4563 struct ieee80211_supported_band *sband;
4564 const u8 *ssidie, *ht_ie, *vht_ie;
4566 bool override = false;
4568 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4573 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4579 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4580 assoc_data->ssid_len = ssidie[1];
4583 if (ifmgd->associated) {
4584 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4587 "disconnect from AP %pM for new assoc to %pM\n",
4588 ifmgd->associated->bssid, req->bss->bssid);
4589 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4590 WLAN_REASON_UNSPECIFIED,
4593 ieee80211_report_disconnect(sdata, frame_buf,
4594 sizeof(frame_buf), true,
4595 WLAN_REASON_UNSPECIFIED);
4598 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4603 if (ifmgd->assoc_data) {
4608 if (ifmgd->auth_data) {
4611 /* keep sta info, bssid if matching */
4612 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4613 ieee80211_destroy_auth_data(sdata, match);
4616 /* prepare assoc data */
4618 ifmgd->beacon_crc_valid = false;
4620 assoc_data->wmm = bss->wmm_used &&
4621 (local->hw.queues >= IEEE80211_NUM_ACS);
4624 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4625 * We still associate in non-HT mode (11a/b/g) if any one of these
4626 * ciphers is configured as pairwise.
4627 * We can set this to true for non-11n hardware, that'll be checked
4628 * separately along with the peer capabilities.
4630 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4631 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4632 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4633 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4634 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4635 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4636 netdev_info(sdata->dev,
4637 "disabling HT/VHT due to WEP/TKIP use\n");
4641 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4642 sband = local->hw.wiphy->bands[req->bss->channel->band];
4643 if (!sband->ht_cap.ht_supported ||
4644 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4645 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4646 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4647 if (!bss->wmm_used &&
4648 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4649 netdev_info(sdata->dev,
4650 "disabling HT as WMM/QoS is not supported by the AP\n");
4653 /* disable VHT if we don't support it or the AP doesn't use WMM */
4654 if (!sband->vht_cap.vht_supported ||
4655 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4656 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4657 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4658 if (!bss->wmm_used &&
4659 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4660 netdev_info(sdata->dev,
4661 "disabling VHT as WMM/QoS is not supported by the AP\n");
4664 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4665 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4666 sizeof(ifmgd->ht_capa_mask));
4668 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4669 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4670 sizeof(ifmgd->vht_capa_mask));
4672 if (req->ie && req->ie_len) {
4673 memcpy(assoc_data->ie, req->ie, req->ie_len);
4674 assoc_data->ie_len = req->ie_len;
4677 assoc_data->bss = req->bss;
4679 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4680 if (ifmgd->powersave)
4681 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4683 sdata->smps_mode = IEEE80211_SMPS_OFF;
4685 sdata->smps_mode = ifmgd->req_smps;
4687 assoc_data->capability = req->bss->capability;
4688 assoc_data->supp_rates = bss->supp_rates;
4689 assoc_data->supp_rates_len = bss->supp_rates_len;
4692 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4693 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4694 assoc_data->ap_ht_param =
4695 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4697 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4698 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4699 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4700 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4701 sizeof(struct ieee80211_vht_cap));
4703 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4706 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4707 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4708 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4709 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4711 if (bss->wmm_used && bss->uapsd_supported &&
4712 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4713 assoc_data->uapsd = true;
4714 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4716 assoc_data->uapsd = false;
4717 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4720 if (req->prev_bssid)
4721 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4724 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4725 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4727 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4728 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4731 if (req->flags & ASSOC_REQ_USE_RRM)
4732 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4734 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4736 if (req->crypto.control_port)
4737 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4739 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4741 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4742 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4743 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4746 /* kick off associate process */
4748 ifmgd->assoc_data = assoc_data;
4749 ifmgd->dtim_period = 0;
4750 ifmgd->have_beacon = false;
4752 /* override HT/VHT configuration only if the AP and we support it */
4753 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4754 struct ieee80211_sta_ht_cap sta_ht_cap;
4756 if (req->flags & ASSOC_REQ_DISABLE_HT)
4759 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4760 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4762 /* check for 40 MHz disable override */
4763 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4764 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4765 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4768 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4769 req->flags & ASSOC_REQ_DISABLE_VHT)
4773 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4774 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4775 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4778 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4779 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4781 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4786 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4788 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4791 * Wait up to one beacon interval ...
4792 * should this be more if we miss one?
4794 sdata_info(sdata, "waiting for beacon from %pM\n",
4796 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4797 assoc_data->timeout_started = true;
4798 assoc_data->need_beacon = true;
4799 } else if (beacon_ies) {
4800 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4805 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4806 const struct ieee80211_tim_ie *tim;
4807 tim = (void *)(tim_ie + 2);
4808 ifmgd->dtim_period = tim->dtim_period;
4809 dtim_count = tim->dtim_count;
4811 ifmgd->have_beacon = true;
4812 assoc_data->timeout = jiffies;
4813 assoc_data->timeout_started = true;
4815 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4816 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4817 sdata->vif.bss_conf.sync_device_ts =
4818 bss->device_ts_beacon;
4819 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4822 assoc_data->timeout = jiffies;
4823 assoc_data->timeout_started = true;
4827 run_again(sdata, assoc_data->timeout);
4829 if (bss->corrupt_data) {
4830 char *corrupt_type = "data";
4831 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4832 if (bss->corrupt_data &
4833 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4834 corrupt_type = "beacon and probe response";
4836 corrupt_type = "beacon";
4837 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4838 corrupt_type = "probe response";
4839 sdata_info(sdata, "associating with AP with corrupt %s\n",
4845 eth_zero_addr(ifmgd->bssid);
4846 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4847 ifmgd->assoc_data = NULL;
4853 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4854 struct cfg80211_deauth_request *req)
4856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4857 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4858 bool tx = !req->local_state_change;
4860 if (ifmgd->auth_data &&
4861 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4863 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4864 req->bssid, req->reason_code,
4865 ieee80211_get_reason_code_string(req->reason_code));
4867 drv_mgd_prepare_tx(sdata->local, sdata);
4868 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4869 IEEE80211_STYPE_DEAUTH,
4870 req->reason_code, tx,
4872 ieee80211_destroy_auth_data(sdata, false);
4873 ieee80211_report_disconnect(sdata, frame_buf,
4874 sizeof(frame_buf), true,
4880 if (ifmgd->assoc_data &&
4881 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4883 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4884 req->bssid, req->reason_code,
4885 ieee80211_get_reason_code_string(req->reason_code));
4887 drv_mgd_prepare_tx(sdata->local, sdata);
4888 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4889 IEEE80211_STYPE_DEAUTH,
4890 req->reason_code, tx,
4892 ieee80211_destroy_assoc_data(sdata, false);
4893 ieee80211_report_disconnect(sdata, frame_buf,
4894 sizeof(frame_buf), true,
4899 if (ifmgd->associated &&
4900 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4902 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4903 req->bssid, req->reason_code,
4904 ieee80211_get_reason_code_string(req->reason_code));
4906 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4907 req->reason_code, tx, frame_buf);
4908 ieee80211_report_disconnect(sdata, frame_buf,
4909 sizeof(frame_buf), true,
4917 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4918 struct cfg80211_disassoc_request *req)
4920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4922 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4925 * cfg80211 should catch this ... but it's racy since
4926 * we can receive a disassoc frame, process it, hand it
4927 * to cfg80211 while that's in a locked section already
4928 * trying to tell us that the user wants to disconnect.
4930 if (ifmgd->associated != req->bss)
4934 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4935 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4937 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4938 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4939 req->reason_code, !req->local_state_change,
4942 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4948 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4953 * Make sure some work items will not run after this,
4954 * they will not do anything but might not have been
4955 * cancelled when disconnecting.
4957 cancel_work_sync(&ifmgd->monitor_work);
4958 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4959 cancel_work_sync(&ifmgd->request_smps_work);
4960 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4961 cancel_work_sync(&ifmgd->chswitch_work);
4962 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4965 if (ifmgd->assoc_data) {
4966 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4967 ieee80211_destroy_assoc_data(sdata, false);
4968 cfg80211_assoc_timeout(sdata->dev, bss);
4970 if (ifmgd->auth_data)
4971 ieee80211_destroy_auth_data(sdata, false);
4972 spin_lock_bh(&ifmgd->teardown_lock);
4973 if (ifmgd->teardown_skb) {
4974 kfree_skb(ifmgd->teardown_skb);
4975 ifmgd->teardown_skb = NULL;
4976 ifmgd->orig_teardown_skb = NULL;
4978 spin_unlock_bh(&ifmgd->teardown_lock);
4979 del_timer_sync(&ifmgd->timer);
4980 sdata_unlock(sdata);
4983 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4984 enum nl80211_cqm_rssi_threshold_event rssi_event,
4987 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4989 trace_api_cqm_rssi_notify(sdata, rssi_event);
4991 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4993 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4995 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4997 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4999 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5001 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5003 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);