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 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/pm_qos.h>
24 #include <linux/crc32.h>
25 #include <linux/slab.h>
26 #include <linux/export.h>
27 #include <net/mac80211.h>
28 #include <asm/unaligned.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43 #define IEEE80211_ASSOC_MAX_TRIES 3
45 static int max_nullfunc_tries = 2;
46 module_param(max_nullfunc_tries, int, 0644);
47 MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
50 static int max_probe_tries = 5;
51 module_param(max_probe_tries, int, 0644);
52 MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
63 static int beacon_loss_count = 7;
64 module_param(beacon_loss_count, int, 0644);
65 MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
78 static int probe_wait_ms = 500;
79 module_param(probe_wait_ms, int, 0644);
80 MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
85 * Weight given to the latest Beacon frame when calculating average signal
86 * strength for Beacon frames received in the current BSS. This must be
89 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
92 * How many Beacon frames need to have been used in average signal strength
93 * before starting to indicate signal change events.
95 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
98 * We can have multiple work items (and connection probing)
99 * scheduling this timer, but we need to take care to only
100 * reschedule it when it should fire _earlier_ than it was
101 * asked for before, or if it's not pending right now. This
102 * function ensures that. Note that it then is required to
103 * run this function for all timeouts after the first one
104 * has happened -- the work that runs from this timer will
107 static void run_again(struct ieee80211_sub_if_data *sdata,
108 unsigned long timeout)
110 sdata_assert_lock(sdata);
112 if (!timer_pending(&sdata->u.mgd.timer) ||
113 time_before(timeout, sdata->u.mgd.timer.expires))
114 mod_timer(&sdata->u.mgd.timer, timeout);
117 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
119 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
122 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
125 mod_timer(&sdata->u.mgd.bcn_mon_timer,
126 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
129 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133 if (unlikely(!sdata->u.mgd.associated))
136 ifmgd->probe_send_count = 0;
138 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
141 mod_timer(&sdata->u.mgd.conn_mon_timer,
142 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
145 static int ecw2cw(int ecw)
147 return (1 << ecw) - 1;
151 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
152 struct ieee80211_supported_band *sband,
153 struct ieee80211_channel *channel,
154 const struct ieee80211_ht_cap *ht_cap,
155 const struct ieee80211_ht_operation *ht_oper,
156 const struct ieee80211_vht_operation *vht_oper,
157 struct cfg80211_chan_def *chandef, bool tracking)
159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
160 struct cfg80211_chan_def vht_chandef;
161 struct ieee80211_sta_ht_cap sta_ht_cap;
164 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
165 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
167 chandef->chan = channel;
168 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
169 chandef->center_freq1 = channel->center_freq;
170 chandef->center_freq2 = 0;
172 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
173 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
177 chandef->width = NL80211_CHAN_WIDTH_20;
179 if (!(ht_cap->cap_info &
180 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
181 ret = IEEE80211_STA_DISABLE_40MHZ;
182 vht_chandef = *chandef;
186 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
188 /* check that channel matches the right operating channel */
189 if (!tracking && channel->center_freq != ht_cfreq) {
191 * It's possible that some APs are confused here;
192 * Netgear WNDR3700 sometimes reports 4 higher than
193 * the actual channel in association responses, but
194 * since we look at probe response/beacon data here
198 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
199 channel->center_freq, ht_cfreq,
200 ht_oper->primary_chan, channel->band);
201 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
205 /* check 40 MHz support, if we have it */
206 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
207 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
208 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
209 chandef->width = NL80211_CHAN_WIDTH_40;
210 chandef->center_freq1 += 10;
212 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
213 chandef->width = NL80211_CHAN_WIDTH_40;
214 chandef->center_freq1 -= 10;
218 /* 40 MHz (and 80 MHz) must be supported for VHT */
219 ret = IEEE80211_STA_DISABLE_VHT;
220 /* also mark 40 MHz disabled */
221 ret |= IEEE80211_STA_DISABLE_40MHZ;
225 if (!vht_oper || !sband->vht_cap.vht_supported) {
226 ret = IEEE80211_STA_DISABLE_VHT;
230 vht_chandef.chan = channel;
231 vht_chandef.center_freq1 =
232 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
234 vht_chandef.center_freq2 = 0;
236 switch (vht_oper->chan_width) {
237 case IEEE80211_VHT_CHANWIDTH_USE_HT:
238 vht_chandef.width = chandef->width;
239 vht_chandef.center_freq1 = chandef->center_freq1;
241 case IEEE80211_VHT_CHANWIDTH_80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80;
244 case IEEE80211_VHT_CHANWIDTH_160MHZ:
245 vht_chandef.width = NL80211_CHAN_WIDTH_160;
247 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
248 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
249 vht_chandef.center_freq2 =
250 ieee80211_channel_to_frequency(
251 vht_oper->center_freq_seg2_idx,
255 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
257 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
258 vht_oper->chan_width);
259 ret = IEEE80211_STA_DISABLE_VHT;
263 if (!cfg80211_chandef_valid(&vht_chandef)) {
264 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
266 "AP VHT information is invalid, disable VHT\n");
267 ret = IEEE80211_STA_DISABLE_VHT;
271 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
276 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
277 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
279 "AP VHT information doesn't match HT, disable VHT\n");
280 ret = IEEE80211_STA_DISABLE_VHT;
284 *chandef = vht_chandef;
290 * When tracking the current AP, don't do any further checks if the
291 * new chandef is identical to the one we're currently using for the
292 * connection. This keeps us from playing ping-pong with regulatory,
293 * without it the following can happen (for example):
294 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
295 * - AP advertises regdom US
296 * - CRDA loads regdom US with 80 MHz prohibited (old database)
297 * - the code below detects an unsupported channel, downgrades, and
298 * we disconnect from the AP in the caller
299 * - disconnect causes CRDA to reload world regdomain and the game
301 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
303 * It seems possible that there are still scenarios with CSA or real
304 * bandwidth changes where a this could happen, but those cases are
305 * less common and wouldn't completely prevent using the AP.
308 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
311 /* don't print the message below for VHT mismatch if VHT is disabled */
312 if (ret & IEEE80211_STA_DISABLE_VHT)
313 vht_chandef = *chandef;
316 * Ignore the DISABLED flag when we're already connected and only
317 * tracking the APs beacon for bandwidth changes - otherwise we
318 * might get disconnected here if we connect to an AP, update our
319 * regulatory information based on the AP's country IE and the
320 * information we have is wrong/outdated and disables the channel
321 * that we're actually using for the connection to the AP.
323 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
325 IEEE80211_CHAN_DISABLED)) {
326 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
327 ret = IEEE80211_STA_DISABLE_HT |
328 IEEE80211_STA_DISABLE_VHT;
332 ret |= ieee80211_chandef_downgrade(chandef);
335 if (chandef->width != vht_chandef.width && !tracking)
337 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
339 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
343 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
344 struct sta_info *sta,
345 const struct ieee80211_ht_cap *ht_cap,
346 const struct ieee80211_ht_operation *ht_oper,
347 const struct ieee80211_vht_operation *vht_oper,
348 const u8 *bssid, u32 *changed)
350 struct ieee80211_local *local = sdata->local;
351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
352 struct ieee80211_supported_band *sband;
353 struct ieee80211_channel *chan;
354 struct cfg80211_chan_def chandef;
357 enum ieee80211_sta_rx_bandwidth new_sta_bw;
360 /* if HT was/is disabled, don't track any bandwidth changes */
361 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
364 /* don't check VHT if we associated as non-VHT station */
365 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
368 if (WARN_ON_ONCE(!sta))
372 * if bss configuration changed store the new one -
373 * this may be applicable even if channel is identical
375 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
376 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
377 *changed |= BSS_CHANGED_HT;
378 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
381 chan = sdata->vif.bss_conf.chandef.chan;
382 sband = local->hw.wiphy->bands[chan->band];
384 /* calculate new channel (type) based on HT/VHT operation IEs */
385 flags = ieee80211_determine_chantype(sdata, sband, chan,
386 ht_cap, ht_oper, vht_oper,
390 * Downgrade the new channel if we associated with restricted
391 * capabilities. For example, if we associated as a 20 MHz STA
392 * to a 40 MHz AP (due to regulatory, capabilities or config
393 * reasons) then switching to a 40 MHz channel now won't do us
394 * any good -- we couldn't use it with the AP.
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
397 chandef.width == NL80211_CHAN_WIDTH_80P80)
398 flags |= ieee80211_chandef_downgrade(&chandef);
399 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
400 chandef.width == NL80211_CHAN_WIDTH_160)
401 flags |= ieee80211_chandef_downgrade(&chandef);
402 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
403 chandef.width > NL80211_CHAN_WIDTH_20)
404 flags |= ieee80211_chandef_downgrade(&chandef);
406 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
410 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
411 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
412 chandef.center_freq1, chandef.center_freq2);
414 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
415 IEEE80211_STA_DISABLE_VHT |
416 IEEE80211_STA_DISABLE_40MHZ |
417 IEEE80211_STA_DISABLE_80P80MHZ |
418 IEEE80211_STA_DISABLE_160MHZ)) ||
419 !cfg80211_chandef_valid(&chandef)) {
421 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
426 switch (chandef.width) {
427 case NL80211_CHAN_WIDTH_20_NOHT:
428 case NL80211_CHAN_WIDTH_20:
429 new_sta_bw = IEEE80211_STA_RX_BW_20;
431 case NL80211_CHAN_WIDTH_40:
432 new_sta_bw = IEEE80211_STA_RX_BW_40;
434 case NL80211_CHAN_WIDTH_80:
435 new_sta_bw = IEEE80211_STA_RX_BW_80;
437 case NL80211_CHAN_WIDTH_80P80:
438 case NL80211_CHAN_WIDTH_160:
439 new_sta_bw = IEEE80211_STA_RX_BW_160;
445 if (new_sta_bw > sta->cur_max_bandwidth)
446 new_sta_bw = sta->cur_max_bandwidth;
448 if (new_sta_bw < sta->sta.bandwidth) {
449 sta->sta.bandwidth = new_sta_bw;
450 rate_control_rate_update(local, sband, sta,
451 IEEE80211_RC_BW_CHANGED);
454 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
457 "AP %pM changed bandwidth to incompatible one - disconnect\n",
462 if (new_sta_bw > sta->sta.bandwidth) {
463 sta->sta.bandwidth = new_sta_bw;
464 rate_control_rate_update(local, sband, sta,
465 IEEE80211_RC_BW_CHANGED);
471 /* frame sending functions */
473 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
474 struct sk_buff *skb, u8 ap_ht_param,
475 struct ieee80211_supported_band *sband,
476 struct ieee80211_channel *channel,
477 enum ieee80211_smps_mode smps)
480 u32 flags = channel->flags;
482 struct ieee80211_sta_ht_cap ht_cap;
484 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
486 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
487 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
489 /* determine capability flags */
492 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
493 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
494 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
499 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
500 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
501 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
502 cap &= ~IEEE80211_HT_CAP_SGI_40;
508 * If 40 MHz was disabled associate as though we weren't
509 * capable of 40 MHz -- some broken APs will never fall
510 * back to trying to transmit in 20 MHz.
512 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
513 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
514 cap &= ~IEEE80211_HT_CAP_SGI_40;
517 /* set SM PS mode properly */
518 cap &= ~IEEE80211_HT_CAP_SM_PS;
520 case IEEE80211_SMPS_AUTOMATIC:
521 case IEEE80211_SMPS_NUM_MODES:
523 case IEEE80211_SMPS_OFF:
524 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
525 IEEE80211_HT_CAP_SM_PS_SHIFT;
527 case IEEE80211_SMPS_STATIC:
528 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
529 IEEE80211_HT_CAP_SM_PS_SHIFT;
531 case IEEE80211_SMPS_DYNAMIC:
532 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
533 IEEE80211_HT_CAP_SM_PS_SHIFT;
537 /* reserve and fill IE */
538 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
539 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
542 /* This function determines vht capability flags for the association
544 * Note - the function may set the owner of the MU-MIMO capability
546 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
548 struct ieee80211_supported_band *sband,
549 struct ieee80211_vht_cap *ap_vht_cap)
551 struct ieee80211_local *local = sdata->local;
554 struct ieee80211_sta_vht_cap vht_cap;
555 u32 mask, ap_bf_sts, our_bf_sts;
557 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
559 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
560 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
562 /* determine capability flags */
565 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
566 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
568 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
569 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
570 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
571 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
574 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
575 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
576 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
580 * Some APs apparently get confused if our capabilities are better
581 * than theirs, so restrict what we advertise in the assoc request.
583 if (!(ap_vht_cap->vht_cap_info &
584 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
585 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
586 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
587 else if (!(ap_vht_cap->vht_cap_info &
588 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
589 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
592 * If some other vif is using the MU-MIMO capablity we cannot associate
593 * using MU-MIMO - this will lead to contradictions in the group-id
595 * Ownership is defined since association request, in order to avoid
596 * simultaneous associations with MU-MIMO.
598 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
599 bool disable_mu_mimo = false;
600 struct ieee80211_sub_if_data *other;
602 list_for_each_entry_rcu(other, &local->interfaces, list) {
603 if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
604 disable_mu_mimo = true;
609 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
611 sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
614 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
616 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
617 our_bf_sts = cap & mask;
619 if (ap_bf_sts < our_bf_sts) {
624 /* reserve and fill IE */
625 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
626 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
629 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
631 struct ieee80211_local *local = sdata->local;
632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
633 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
635 struct ieee80211_mgmt *mgmt;
637 size_t offset = 0, noffset;
638 int i, count, rates_len, supp_rates_len, shift;
640 struct ieee80211_supported_band *sband;
641 struct ieee80211_chanctx_conf *chanctx_conf;
642 struct ieee80211_channel *chan;
643 u32 rate_flags, rates = 0;
645 sdata_assert_lock(sdata);
648 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
649 if (WARN_ON(!chanctx_conf)) {
653 chan = chanctx_conf->def.chan;
654 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
656 sband = local->hw.wiphy->bands[chan->band];
657 shift = ieee80211_vif_get_shift(&sdata->vif);
659 if (assoc_data->supp_rates_len) {
661 * Get all rates supported by the device and the AP as
662 * some APs don't like getting a superset of their rates
663 * in the association request (e.g. D-Link DAP 1353 in
666 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
667 assoc_data->supp_rates,
668 assoc_data->supp_rates_len,
672 * In case AP not provide any supported rates information
673 * before association, we send information element(s) with
674 * all rates that we support.
677 for (i = 0; i < sband->n_bitrates; i++) {
678 if ((rate_flags & sband->bitrates[i].flags)
686 skb = alloc_skb(local->hw.extra_tx_headroom +
687 sizeof(*mgmt) + /* bit too much but doesn't matter */
688 2 + assoc_data->ssid_len + /* SSID */
689 4 + rates_len + /* (extended) rates */
690 4 + /* power capability */
691 2 + 2 * sband->n_channels + /* supported channels */
692 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
693 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
694 assoc_data->ie_len + /* extra IEs */
700 skb_reserve(skb, local->hw.extra_tx_headroom);
702 capab = WLAN_CAPABILITY_ESS;
704 if (sband->band == IEEE80211_BAND_2GHZ) {
705 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
706 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
709 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
710 capab |= WLAN_CAPABILITY_PRIVACY;
712 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
713 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
714 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
716 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
717 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
719 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
721 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
722 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
723 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
725 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
727 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
728 IEEE80211_STYPE_REASSOC_REQ);
729 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
730 mgmt->u.reassoc_req.listen_interval =
731 cpu_to_le16(local->hw.conf.listen_interval);
732 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
736 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
737 IEEE80211_STYPE_ASSOC_REQ);
738 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
739 mgmt->u.assoc_req.listen_interval =
740 cpu_to_le16(local->hw.conf.listen_interval);
744 pos = skb_put(skb, 2 + assoc_data->ssid_len);
745 *pos++ = WLAN_EID_SSID;
746 *pos++ = assoc_data->ssid_len;
747 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
749 /* add all rates which were marked to be used above */
750 supp_rates_len = rates_len;
751 if (supp_rates_len > 8)
754 pos = skb_put(skb, supp_rates_len + 2);
755 *pos++ = WLAN_EID_SUPP_RATES;
756 *pos++ = supp_rates_len;
759 for (i = 0; i < sband->n_bitrates; i++) {
760 if (BIT(i) & rates) {
761 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
769 if (rates_len > count) {
770 pos = skb_put(skb, rates_len - count + 2);
771 *pos++ = WLAN_EID_EXT_SUPP_RATES;
772 *pos++ = rates_len - count;
774 for (i++; i < sband->n_bitrates; i++) {
775 if (BIT(i) & rates) {
777 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
784 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
785 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
786 pos = skb_put(skb, 4);
787 *pos++ = WLAN_EID_PWR_CAPABILITY;
789 *pos++ = 0; /* min tx power */
791 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
794 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
795 /* TODO: get this in reg domain format */
796 pos = skb_put(skb, 2 * sband->n_channels + 2);
797 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
798 *pos++ = 2 * sband->n_channels;
799 for (i = 0; i < sband->n_channels; i++) {
800 *pos++ = ieee80211_frequency_to_channel(
801 sband->channels[i].center_freq);
802 *pos++ = 1; /* one channel in the subband*/
806 /* if present, add any custom IEs that go before HT */
807 if (assoc_data->ie_len) {
808 static const u8 before_ht[] = {
811 WLAN_EID_EXT_SUPP_RATES,
812 WLAN_EID_PWR_CAPABILITY,
813 WLAN_EID_SUPPORTED_CHANNELS,
816 WLAN_EID_RRM_ENABLED_CAPABILITIES,
817 WLAN_EID_MOBILITY_DOMAIN,
818 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
819 WLAN_EID_RIC_DATA, /* reassoc only */
820 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
822 static const u8 after_ric[] = {
823 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
824 WLAN_EID_HT_CAPABILITY,
825 WLAN_EID_BSS_COEX_2040,
826 WLAN_EID_EXT_CAPABILITY,
827 WLAN_EID_QOS_TRAFFIC_CAPA,
828 WLAN_EID_TIM_BCAST_REQ,
829 WLAN_EID_INTERWORKING,
830 /* 60GHz doesn't happen right now */
831 WLAN_EID_VHT_CAPABILITY,
832 WLAN_EID_OPMODE_NOTIF,
835 noffset = ieee80211_ie_split_ric(assoc_data->ie,
838 ARRAY_SIZE(before_ht),
840 ARRAY_SIZE(after_ric),
842 pos = skb_put(skb, noffset - offset);
843 memcpy(pos, assoc_data->ie + offset, noffset - offset);
847 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
848 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
849 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
851 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
852 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
853 sband, chan, sdata->smps_mode);
855 /* if present, add any custom IEs that go before VHT */
856 if (assoc_data->ie_len) {
857 static const u8 before_vht[] = {
860 WLAN_EID_EXT_SUPP_RATES,
861 WLAN_EID_PWR_CAPABILITY,
862 WLAN_EID_SUPPORTED_CHANNELS,
865 WLAN_EID_RRM_ENABLED_CAPABILITIES,
866 WLAN_EID_MOBILITY_DOMAIN,
867 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
868 WLAN_EID_HT_CAPABILITY,
869 WLAN_EID_BSS_COEX_2040,
870 WLAN_EID_EXT_CAPABILITY,
871 WLAN_EID_QOS_TRAFFIC_CAPA,
872 WLAN_EID_TIM_BCAST_REQ,
873 WLAN_EID_INTERWORKING,
876 /* RIC already taken above, so no need to handle here anymore */
877 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
878 before_vht, ARRAY_SIZE(before_vht),
880 pos = skb_put(skb, noffset - offset);
881 memcpy(pos, assoc_data->ie + offset, noffset - offset);
885 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
886 ieee80211_add_vht_ie(sdata, skb, sband,
887 &assoc_data->ap_vht_cap);
889 /* if present, add any custom non-vendor IEs that go after HT */
890 if (assoc_data->ie_len) {
891 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
894 pos = skb_put(skb, noffset - offset);
895 memcpy(pos, assoc_data->ie + offset, noffset - offset);
899 if (assoc_data->wmm) {
900 if (assoc_data->uapsd) {
901 qos_info = ifmgd->uapsd_queues;
902 qos_info |= (ifmgd->uapsd_max_sp_len <<
903 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
908 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
911 /* add any remaining custom (i.e. vendor specific here) IEs */
912 if (assoc_data->ie_len) {
913 noffset = assoc_data->ie_len;
914 pos = skb_put(skb, noffset - offset);
915 memcpy(pos, assoc_data->ie + offset, noffset - offset);
918 drv_mgd_prepare_tx(local, sdata);
920 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
921 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
922 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
923 IEEE80211_TX_INTFL_MLME_CONN_TX;
924 ieee80211_tx_skb(sdata, skb);
927 void ieee80211_send_pspoll(struct ieee80211_local *local,
928 struct ieee80211_sub_if_data *sdata)
930 struct ieee80211_pspoll *pspoll;
933 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
937 pspoll = (struct ieee80211_pspoll *) skb->data;
938 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
940 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
941 ieee80211_tx_skb(sdata, skb);
944 void ieee80211_send_nullfunc(struct ieee80211_local *local,
945 struct ieee80211_sub_if_data *sdata,
949 struct ieee80211_hdr_3addr *nullfunc;
950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
952 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
956 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
958 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
960 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
961 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
963 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
964 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
966 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
969 ieee80211_tx_skb(sdata, skb);
972 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
973 struct ieee80211_sub_if_data *sdata)
976 struct ieee80211_hdr *nullfunc;
979 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
982 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
986 skb_reserve(skb, local->hw.extra_tx_headroom);
988 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
989 memset(nullfunc, 0, 30);
990 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
991 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
992 nullfunc->frame_control = fc;
993 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
994 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
995 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
996 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
998 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
999 ieee80211_tx_skb(sdata, skb);
1002 /* spectrum management related things */
1003 static void ieee80211_chswitch_work(struct work_struct *work)
1005 struct ieee80211_sub_if_data *sdata =
1006 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1007 struct ieee80211_local *local = sdata->local;
1008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1011 if (!ieee80211_sdata_running(sdata))
1015 mutex_lock(&local->mtx);
1016 mutex_lock(&local->chanctx_mtx);
1018 if (!ifmgd->associated)
1021 if (!sdata->vif.csa_active)
1025 * using reservation isn't immediate as it may be deferred until later
1026 * with multi-vif. once reservation is complete it will re-schedule the
1027 * work with no reserved_chanctx so verify chandef to check if it
1028 * completed successfully
1031 if (sdata->reserved_chanctx) {
1033 * with multi-vif csa driver may call ieee80211_csa_finish()
1034 * many times while waiting for other interfaces to use their
1037 if (sdata->reserved_ready)
1040 ret = ieee80211_vif_use_reserved_context(sdata);
1043 "failed to use reserved channel context, disconnecting (err=%d)\n",
1045 ieee80211_queue_work(&sdata->local->hw,
1046 &ifmgd->csa_connection_drop_work);
1053 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1054 &sdata->csa_chandef)) {
1056 "failed to finalize channel switch, disconnecting\n");
1057 ieee80211_queue_work(&sdata->local->hw,
1058 &ifmgd->csa_connection_drop_work);
1062 /* XXX: shouldn't really modify cfg80211-owned data! */
1063 ifmgd->associated->channel = sdata->csa_chandef.chan;
1065 ifmgd->csa_waiting_bcn = true;
1067 ieee80211_sta_reset_beacon_monitor(sdata);
1068 ieee80211_sta_reset_conn_monitor(sdata);
1071 mutex_unlock(&local->chanctx_mtx);
1072 mutex_unlock(&local->mtx);
1073 sdata_unlock(sdata);
1076 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1078 struct ieee80211_local *local = sdata->local;
1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1082 sdata_assert_lock(sdata);
1084 WARN_ON(!sdata->vif.csa_active);
1086 if (sdata->csa_block_tx) {
1087 ieee80211_wake_vif_queues(local, sdata,
1088 IEEE80211_QUEUE_STOP_REASON_CSA);
1089 sdata->csa_block_tx = false;
1092 sdata->vif.csa_active = false;
1093 ifmgd->csa_waiting_bcn = false;
1095 ret = drv_post_channel_switch(sdata);
1098 "driver post channel switch failed, disconnecting\n");
1099 ieee80211_queue_work(&local->hw,
1100 &ifmgd->csa_connection_drop_work);
1104 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1107 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1109 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1110 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1112 trace_api_chswitch_done(sdata, success);
1115 "driver channel switch failed, disconnecting\n");
1116 ieee80211_queue_work(&sdata->local->hw,
1117 &ifmgd->csa_connection_drop_work);
1119 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1122 EXPORT_SYMBOL(ieee80211_chswitch_done);
1124 static void ieee80211_chswitch_timer(unsigned long data)
1126 struct ieee80211_sub_if_data *sdata =
1127 (struct ieee80211_sub_if_data *) data;
1129 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1133 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1134 u64 timestamp, u32 device_timestamp,
1135 struct ieee802_11_elems *elems,
1138 struct ieee80211_local *local = sdata->local;
1139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1140 struct cfg80211_bss *cbss = ifmgd->associated;
1141 struct ieee80211_chanctx_conf *conf;
1142 struct ieee80211_chanctx *chanctx;
1143 enum ieee80211_band current_band;
1144 struct ieee80211_csa_ie csa_ie;
1145 struct ieee80211_channel_switch ch_switch;
1148 sdata_assert_lock(sdata);
1153 if (local->scanning)
1156 /* disregard subsequent announcements if we are already processing */
1157 if (sdata->vif.csa_active)
1160 current_band = cbss->channel->band;
1161 memset(&csa_ie, 0, sizeof(csa_ie));
1162 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1164 ifmgd->associated->bssid, &csa_ie);
1166 ieee80211_queue_work(&local->hw,
1167 &ifmgd->csa_connection_drop_work);
1171 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1172 IEEE80211_CHAN_DISABLED)) {
1174 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1175 ifmgd->associated->bssid,
1176 csa_ie.chandef.chan->center_freq,
1177 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1178 csa_ie.chandef.center_freq2);
1179 ieee80211_queue_work(&local->hw,
1180 &ifmgd->csa_connection_drop_work);
1184 if (cfg80211_chandef_identical(&csa_ie.chandef,
1185 &sdata->vif.bss_conf.chandef)) {
1186 if (ifmgd->csa_ignored_same_chan)
1189 "AP %pM tries to chanswitch to same channel, ignore\n",
1190 ifmgd->associated->bssid);
1191 ifmgd->csa_ignored_same_chan = true;
1196 * Drop all TDLS peers - either we disconnect or move to a different
1197 * channel from this point on. There's no telling what our peer will do.
1198 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1199 * have an incompatible wider chandef.
1201 ieee80211_teardown_tdls_peers(sdata);
1203 mutex_lock(&local->mtx);
1204 mutex_lock(&local->chanctx_mtx);
1205 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1206 lockdep_is_held(&local->chanctx_mtx));
1209 "no channel context assigned to vif?, disconnecting\n");
1210 goto drop_connection;
1213 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1215 if (local->use_chanctx &&
1216 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1218 "driver doesn't support chan-switch with channel contexts\n");
1219 goto drop_connection;
1222 ch_switch.timestamp = timestamp;
1223 ch_switch.device_timestamp = device_timestamp;
1224 ch_switch.block_tx = csa_ie.mode;
1225 ch_switch.chandef = csa_ie.chandef;
1226 ch_switch.count = csa_ie.count;
1228 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1230 "preparing for channel switch failed, disconnecting\n");
1231 goto drop_connection;
1234 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1235 chanctx->mode, false);
1238 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1240 goto drop_connection;
1242 mutex_unlock(&local->chanctx_mtx);
1244 sdata->vif.csa_active = true;
1245 sdata->csa_chandef = csa_ie.chandef;
1246 sdata->csa_block_tx = csa_ie.mode;
1247 ifmgd->csa_ignored_same_chan = false;
1249 if (sdata->csa_block_tx)
1250 ieee80211_stop_vif_queues(local, sdata,
1251 IEEE80211_QUEUE_STOP_REASON_CSA);
1252 mutex_unlock(&local->mtx);
1254 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1257 if (local->ops->channel_switch) {
1258 /* use driver's channel switch callback */
1259 drv_channel_switch(local, sdata, &ch_switch);
1263 /* channel switch handled in software */
1264 if (csa_ie.count <= 1)
1265 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1267 mod_timer(&ifmgd->chswitch_timer,
1268 TU_TO_EXP_TIME((csa_ie.count - 1) *
1269 cbss->beacon_interval));
1272 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1273 mutex_unlock(&local->chanctx_mtx);
1274 mutex_unlock(&local->mtx);
1278 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1279 struct ieee80211_channel *channel,
1280 const u8 *country_ie, u8 country_ie_len,
1281 const u8 *pwr_constr_elem,
1282 int *chan_pwr, int *pwr_reduction)
1284 struct ieee80211_country_ie_triplet *triplet;
1285 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1286 int i, chan_increment;
1287 bool have_chan_pwr = false;
1290 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1293 triplet = (void *)(country_ie + 3);
1294 country_ie_len -= 3;
1296 switch (channel->band) {
1300 case IEEE80211_BAND_2GHZ:
1301 case IEEE80211_BAND_60GHZ:
1304 case IEEE80211_BAND_5GHZ:
1310 while (country_ie_len >= 3) {
1311 u8 first_channel = triplet->chans.first_channel;
1313 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1316 for (i = 0; i < triplet->chans.num_channels; i++) {
1317 if (first_channel + i * chan_increment == chan) {
1318 have_chan_pwr = true;
1319 *chan_pwr = triplet->chans.max_power;
1328 country_ie_len -= 3;
1331 if (have_chan_pwr && pwr_constr_elem)
1332 *pwr_reduction = *pwr_constr_elem;
1336 return have_chan_pwr;
1339 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1340 struct ieee80211_channel *channel,
1341 const u8 *cisco_dtpc_ie,
1344 /* From practical testing, the first data byte of the DTPC element
1345 * seems to contain the requested dBm level, and the CLI on Cisco
1346 * APs clearly state the range is -127 to 127 dBm, which indicates
1347 * a signed byte, although it seemingly never actually goes negative.
1348 * The other byte seems to always be zero.
1350 *pwr_level = (__s8)cisco_dtpc_ie[4];
1353 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1354 struct ieee80211_channel *channel,
1355 struct ieee80211_mgmt *mgmt,
1356 const u8 *country_ie, u8 country_ie_len,
1357 const u8 *pwr_constr_ie,
1358 const u8 *cisco_dtpc_ie)
1360 bool has_80211h_pwr = false, has_cisco_pwr = false;
1361 int chan_pwr = 0, pwr_reduction_80211h = 0;
1362 int pwr_level_cisco, pwr_level_80211h;
1364 __le16 capab = mgmt->u.probe_resp.capab_info;
1367 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1368 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1369 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1370 sdata, channel, country_ie, country_ie_len,
1371 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1373 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1376 if (cisco_dtpc_ie) {
1377 ieee80211_find_cisco_dtpc(
1378 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1379 has_cisco_pwr = true;
1382 if (!has_80211h_pwr && !has_cisco_pwr)
1385 /* If we have both 802.11h and Cisco DTPC, apply both limits
1386 * by picking the smallest of the two power levels advertised.
1388 if (has_80211h_pwr &&
1389 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1391 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1392 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1393 sdata->u.mgd.bssid);
1394 new_ap_level = pwr_level_80211h;
1395 } else { /* has_cisco_pwr is always true here. */
1397 "Limiting TX power to %d dBm as advertised by %pM\n",
1398 pwr_level_cisco, sdata->u.mgd.bssid);
1399 new_ap_level = pwr_level_cisco;
1402 if (sdata->ap_power_level == new_ap_level)
1405 sdata->ap_power_level = new_ap_level;
1406 if (__ieee80211_recalc_txpower(sdata))
1407 return BSS_CHANGED_TXPOWER;
1412 static void ieee80211_enable_ps(struct ieee80211_local *local,
1413 struct ieee80211_sub_if_data *sdata)
1415 struct ieee80211_conf *conf = &local->hw.conf;
1418 * If we are scanning right now then the parameters will
1419 * take effect when scan finishes.
1421 if (local->scanning)
1424 if (conf->dynamic_ps_timeout > 0 &&
1425 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1426 mod_timer(&local->dynamic_ps_timer, jiffies +
1427 msecs_to_jiffies(conf->dynamic_ps_timeout));
1429 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1430 ieee80211_send_nullfunc(local, sdata, 1);
1432 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1433 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1436 conf->flags |= IEEE80211_CONF_PS;
1437 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1441 static void ieee80211_change_ps(struct ieee80211_local *local)
1443 struct ieee80211_conf *conf = &local->hw.conf;
1445 if (local->ps_sdata) {
1446 ieee80211_enable_ps(local, local->ps_sdata);
1447 } else if (conf->flags & IEEE80211_CONF_PS) {
1448 conf->flags &= ~IEEE80211_CONF_PS;
1449 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1450 del_timer_sync(&local->dynamic_ps_timer);
1451 cancel_work_sync(&local->dynamic_ps_enable_work);
1455 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1457 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1458 struct sta_info *sta = NULL;
1459 bool authorized = false;
1461 if (!mgd->powersave)
1467 if (!mgd->associated)
1470 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1473 if (!mgd->have_beacon)
1477 sta = sta_info_get(sdata, mgd->bssid);
1479 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1485 /* need to hold RTNL or interface lock */
1486 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1488 struct ieee80211_sub_if_data *sdata, *found = NULL;
1492 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1493 local->ps_sdata = NULL;
1497 list_for_each_entry(sdata, &local->interfaces, list) {
1498 if (!ieee80211_sdata_running(sdata))
1500 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1501 /* If an AP vif is found, then disable PS
1502 * by setting the count to zero thereby setting
1508 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1514 if (count == 1 && ieee80211_powersave_allowed(found)) {
1518 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1520 beaconint_us = ieee80211_tu_to_usec(
1521 found->vif.bss_conf.beacon_int);
1523 timeout = local->dynamic_ps_forced_timeout;
1526 * Go to full PSM if the user configures a very low
1527 * latency requirement.
1528 * The 2000 second value is there for compatibility
1529 * until the PM_QOS_NETWORK_LATENCY is configured
1532 if (latency > (1900 * USEC_PER_MSEC) &&
1533 latency != (2000 * USEC_PER_SEC))
1538 local->hw.conf.dynamic_ps_timeout = timeout;
1540 if (beaconint_us > latency) {
1541 local->ps_sdata = NULL;
1544 u8 dtimper = found->u.mgd.dtim_period;
1546 /* If the TIM IE is invalid, pretend the value is 1 */
1549 else if (dtimper > 1)
1550 maxslp = min_t(int, dtimper,
1551 latency / beaconint_us);
1553 local->hw.conf.max_sleep_period = maxslp;
1554 local->hw.conf.ps_dtim_period = dtimper;
1555 local->ps_sdata = found;
1558 local->ps_sdata = NULL;
1561 ieee80211_change_ps(local);
1564 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1566 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1568 if (sdata->vif.bss_conf.ps != ps_allowed) {
1569 sdata->vif.bss_conf.ps = ps_allowed;
1570 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1574 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1576 struct ieee80211_local *local =
1577 container_of(work, struct ieee80211_local,
1578 dynamic_ps_disable_work);
1580 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1581 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1582 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1585 ieee80211_wake_queues_by_reason(&local->hw,
1586 IEEE80211_MAX_QUEUE_MAP,
1587 IEEE80211_QUEUE_STOP_REASON_PS,
1591 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1593 struct ieee80211_local *local =
1594 container_of(work, struct ieee80211_local,
1595 dynamic_ps_enable_work);
1596 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1597 struct ieee80211_if_managed *ifmgd;
1598 unsigned long flags;
1601 /* can only happen when PS was just disabled anyway */
1605 ifmgd = &sdata->u.mgd;
1607 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1610 if (local->hw.conf.dynamic_ps_timeout > 0) {
1611 /* don't enter PS if TX frames are pending */
1612 if (drv_tx_frames_pending(local)) {
1613 mod_timer(&local->dynamic_ps_timer, jiffies +
1615 local->hw.conf.dynamic_ps_timeout));
1620 * transmission can be stopped by others which leads to
1621 * dynamic_ps_timer expiry. Postpone the ps timer if it
1622 * is not the actual idle state.
1624 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1625 for (q = 0; q < local->hw.queues; q++) {
1626 if (local->queue_stop_reasons[q]) {
1627 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1629 mod_timer(&local->dynamic_ps_timer, jiffies +
1631 local->hw.conf.dynamic_ps_timeout));
1635 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1638 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1639 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1640 if (drv_tx_frames_pending(local)) {
1641 mod_timer(&local->dynamic_ps_timer, jiffies +
1643 local->hw.conf.dynamic_ps_timeout));
1645 ieee80211_send_nullfunc(local, sdata, 1);
1646 /* Flush to get the tx status of nullfunc frame */
1647 ieee80211_flush_queues(local, sdata, false);
1651 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1652 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1653 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1654 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1655 local->hw.conf.flags |= IEEE80211_CONF_PS;
1656 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1660 void ieee80211_dynamic_ps_timer(unsigned long data)
1662 struct ieee80211_local *local = (void *) data;
1664 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1667 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1669 struct delayed_work *delayed_work =
1670 container_of(work, struct delayed_work, work);
1671 struct ieee80211_sub_if_data *sdata =
1672 container_of(delayed_work, struct ieee80211_sub_if_data,
1673 dfs_cac_timer_work);
1674 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1676 mutex_lock(&sdata->local->mtx);
1677 if (sdata->wdev.cac_started) {
1678 ieee80211_vif_release_channel(sdata);
1679 cfg80211_cac_event(sdata->dev, &chandef,
1680 NL80211_RADAR_CAC_FINISHED,
1683 mutex_unlock(&sdata->local->mtx);
1687 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1689 struct ieee80211_local *local = sdata->local;
1690 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1694 if (local->hw.queues < IEEE80211_NUM_ACS)
1697 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1698 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1700 unsigned long now = jiffies;
1702 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1703 tx_tspec->admitted_time &&
1704 time_after(now, tx_tspec->time_slice_start + HZ)) {
1705 tx_tspec->consumed_tx_time = 0;
1706 tx_tspec->time_slice_start = now;
1708 if (tx_tspec->downgraded)
1710 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1713 switch (tx_tspec->action) {
1714 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1715 /* take the original parameters */
1716 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1718 "failed to set TX queue parameters for queue %d\n",
1720 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1721 tx_tspec->downgraded = false;
1724 case TX_TSPEC_ACTION_DOWNGRADE:
1725 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1726 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1730 /* downgrade next lower non-ACM AC */
1731 for (non_acm_ac = ac + 1;
1732 non_acm_ac < IEEE80211_NUM_ACS;
1734 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1736 /* The loop will result in using BK even if it requires
1737 * admission control, such configuration makes no sense
1738 * and we have to transmit somehow - the AC selection
1739 * does the same thing.
1741 if (drv_conf_tx(local, sdata, ac,
1742 &sdata->tx_conf[non_acm_ac]))
1744 "failed to set TX queue parameters for queue %d\n",
1746 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1748 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1749 tx_tspec->time_slice_start + HZ - now + 1);
1751 case TX_TSPEC_ACTION_NONE:
1760 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1762 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1763 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1766 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1768 struct ieee80211_sub_if_data *sdata;
1770 sdata = container_of(work, struct ieee80211_sub_if_data,
1771 u.mgd.tx_tspec_wk.work);
1772 ieee80211_sta_handle_tspec_ac_params(sdata);
1776 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1777 struct ieee80211_sub_if_data *sdata,
1778 const u8 *wmm_param, size_t wmm_param_len)
1780 struct ieee80211_tx_queue_params params;
1781 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1785 u8 uapsd_queues = 0;
1787 if (!local->ops->conf_tx)
1790 if (local->hw.queues < IEEE80211_NUM_ACS)
1796 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1799 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1800 uapsd_queues = ifmgd->uapsd_queues;
1802 count = wmm_param[6] & 0x0f;
1803 if (count == ifmgd->wmm_last_param_set)
1805 ifmgd->wmm_last_param_set = count;
1807 pos = wmm_param + 8;
1808 left = wmm_param_len - 8;
1810 memset(¶ms, 0, sizeof(params));
1813 for (; left >= 4; left -= 4, pos += 4) {
1814 int aci = (pos[0] >> 5) & 0x03;
1815 int acm = (pos[0] >> 4) & 0x01;
1823 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1824 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1830 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1831 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1837 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1838 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1845 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1846 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1851 params.aifs = pos[0] & 0x0f;
1852 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1853 params.cw_min = ecw2cw(pos[1] & 0x0f);
1854 params.txop = get_unaligned_le16(pos + 2);
1856 params.uapsd = uapsd;
1859 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1861 params.aifs, params.cw_min, params.cw_max,
1862 params.txop, params.uapsd,
1863 ifmgd->tx_tspec[queue].downgraded);
1864 sdata->tx_conf[queue] = params;
1865 if (!ifmgd->tx_tspec[queue].downgraded &&
1866 drv_conf_tx(local, sdata, queue, ¶ms))
1868 "failed to set TX queue parameters for queue %d\n",
1872 /* enable WMM or activate new settings */
1873 sdata->vif.bss_conf.qos = true;
1877 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1879 lockdep_assert_held(&sdata->local->mtx);
1881 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1882 ieee80211_run_deferred_scan(sdata->local);
1885 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1887 mutex_lock(&sdata->local->mtx);
1888 __ieee80211_stop_poll(sdata);
1889 mutex_unlock(&sdata->local->mtx);
1892 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1893 u16 capab, bool erp_valid, u8 erp)
1895 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1897 bool use_protection;
1898 bool use_short_preamble;
1899 bool use_short_slot;
1902 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1903 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1905 use_protection = false;
1906 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1909 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1910 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1911 use_short_slot = true;
1913 if (use_protection != bss_conf->use_cts_prot) {
1914 bss_conf->use_cts_prot = use_protection;
1915 changed |= BSS_CHANGED_ERP_CTS_PROT;
1918 if (use_short_preamble != bss_conf->use_short_preamble) {
1919 bss_conf->use_short_preamble = use_short_preamble;
1920 changed |= BSS_CHANGED_ERP_PREAMBLE;
1923 if (use_short_slot != bss_conf->use_short_slot) {
1924 bss_conf->use_short_slot = use_short_slot;
1925 changed |= BSS_CHANGED_ERP_SLOT;
1931 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1932 struct cfg80211_bss *cbss,
1933 u32 bss_info_changed)
1935 struct ieee80211_bss *bss = (void *)cbss->priv;
1936 struct ieee80211_local *local = sdata->local;
1937 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1939 bss_info_changed |= BSS_CHANGED_ASSOC;
1940 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1941 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1943 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1944 beacon_loss_count * bss_conf->beacon_int));
1946 sdata->u.mgd.associated = cbss;
1947 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1949 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1951 if (sdata->vif.p2p) {
1952 const struct cfg80211_bss_ies *ies;
1955 ies = rcu_dereference(cbss->ies);
1959 ret = cfg80211_get_p2p_attr(
1960 ies->data, ies->len,
1961 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1962 (u8 *) &bss_conf->p2p_noa_attr,
1963 sizeof(bss_conf->p2p_noa_attr));
1965 sdata->u.mgd.p2p_noa_index =
1966 bss_conf->p2p_noa_attr.index;
1967 bss_info_changed |= BSS_CHANGED_P2P_PS;
1973 /* just to be sure */
1974 ieee80211_stop_poll(sdata);
1976 ieee80211_led_assoc(local, 1);
1978 if (sdata->u.mgd.have_beacon) {
1980 * If the AP is buggy we may get here with no DTIM period
1981 * known, so assume it's 1 which is the only safe assumption
1982 * in that case, although if the TIM IE is broken powersave
1983 * probably just won't work at all.
1985 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1986 bss_conf->beacon_rate = bss->beacon_rate;
1987 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1989 bss_conf->beacon_rate = NULL;
1990 bss_conf->dtim_period = 0;
1993 bss_conf->assoc = 1;
1995 /* Tell the driver to monitor connection quality (if supported) */
1996 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1997 bss_conf->cqm_rssi_thold)
1998 bss_info_changed |= BSS_CHANGED_CQM;
2000 /* Enable ARP filtering */
2001 if (bss_conf->arp_addr_cnt)
2002 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2004 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2006 mutex_lock(&local->iflist_mtx);
2007 ieee80211_recalc_ps(local, -1);
2008 mutex_unlock(&local->iflist_mtx);
2010 ieee80211_recalc_smps(sdata);
2011 ieee80211_recalc_ps_vif(sdata);
2013 netif_carrier_on(sdata->dev);
2016 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2017 u16 stype, u16 reason, bool tx,
2020 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2021 struct ieee80211_local *local = sdata->local;
2024 sdata_assert_lock(sdata);
2026 if (WARN_ON_ONCE(tx && !frame_buf))
2029 if (WARN_ON(!ifmgd->associated))
2032 ieee80211_stop_poll(sdata);
2034 ifmgd->associated = NULL;
2035 netif_carrier_off(sdata->dev);
2038 * if we want to get out of ps before disassoc (why?) we have
2039 * to do it before sending disassoc, as otherwise the null-packet
2042 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2043 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2044 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2046 local->ps_sdata = NULL;
2048 /* disable per-vif ps */
2049 ieee80211_recalc_ps_vif(sdata);
2051 /* make sure ongoing transmission finishes */
2055 * drop any frame before deauth/disassoc, this can be data or
2056 * management frame. Since we are disconnecting, we should not
2057 * insist sending these frames which can take time and delay
2058 * the disconnection and possible the roaming.
2061 ieee80211_flush_queues(local, sdata, true);
2063 /* deauthenticate/disassociate now */
2064 if (tx || frame_buf)
2065 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2066 reason, tx, frame_buf);
2068 /* flush out frame - make sure the deauth was actually sent */
2070 ieee80211_flush_queues(local, sdata, false);
2072 /* clear bssid only after building the needed mgmt frames */
2073 eth_zero_addr(ifmgd->bssid);
2075 /* remove AP and TDLS peers */
2076 sta_info_flush(sdata);
2078 /* finally reset all BSS / config parameters */
2079 changed |= ieee80211_reset_erp_info(sdata);
2081 ieee80211_led_assoc(local, 0);
2082 changed |= BSS_CHANGED_ASSOC;
2083 sdata->vif.bss_conf.assoc = false;
2085 ifmgd->p2p_noa_index = -1;
2086 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2087 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2089 /* on the next assoc, re-program HT/VHT parameters */
2090 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2091 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2092 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2093 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2094 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2096 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2098 del_timer_sync(&local->dynamic_ps_timer);
2099 cancel_work_sync(&local->dynamic_ps_enable_work);
2101 /* Disable ARP filtering */
2102 if (sdata->vif.bss_conf.arp_addr_cnt)
2103 changed |= BSS_CHANGED_ARP_FILTER;
2105 sdata->vif.bss_conf.qos = false;
2106 changed |= BSS_CHANGED_QOS;
2108 /* The BSSID (not really interesting) and HT changed */
2109 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2110 ieee80211_bss_info_change_notify(sdata, changed);
2112 /* disassociated - set to defaults now */
2113 ieee80211_set_wmm_default(sdata, false);
2115 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2116 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2117 del_timer_sync(&sdata->u.mgd.timer);
2118 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2120 sdata->vif.bss_conf.dtim_period = 0;
2121 sdata->vif.bss_conf.beacon_rate = NULL;
2123 ifmgd->have_beacon = false;
2126 mutex_lock(&local->mtx);
2127 ieee80211_vif_release_channel(sdata);
2129 sdata->vif.csa_active = false;
2130 ifmgd->csa_waiting_bcn = false;
2131 ifmgd->csa_ignored_same_chan = false;
2132 if (sdata->csa_block_tx) {
2133 ieee80211_wake_vif_queues(local, sdata,
2134 IEEE80211_QUEUE_STOP_REASON_CSA);
2135 sdata->csa_block_tx = false;
2137 mutex_unlock(&local->mtx);
2139 /* existing TX TSPEC sessions no longer exist */
2140 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2141 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2143 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2146 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2147 struct ieee80211_hdr *hdr)
2150 * We can postpone the mgd.timer whenever receiving unicast frames
2151 * from AP because we know that the connection is working both ways
2152 * at that time. But multicast frames (and hence also beacons) must
2153 * be ignored here, because we need to trigger the timer during
2154 * data idle periods for sending the periodic probe request to the
2155 * AP we're connected to.
2157 if (is_multicast_ether_addr(hdr->addr1))
2160 ieee80211_sta_reset_conn_monitor(sdata);
2163 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2166 struct ieee80211_local *local = sdata->local;
2168 mutex_lock(&local->mtx);
2169 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2172 __ieee80211_stop_poll(sdata);
2174 mutex_lock(&local->iflist_mtx);
2175 ieee80211_recalc_ps(local, -1);
2176 mutex_unlock(&local->iflist_mtx);
2178 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2182 * We've received a probe response, but are not sure whether
2183 * we have or will be receiving any beacons or data, so let's
2184 * schedule the timers again, just in case.
2186 ieee80211_sta_reset_beacon_monitor(sdata);
2188 mod_timer(&ifmgd->conn_mon_timer,
2189 round_jiffies_up(jiffies +
2190 IEEE80211_CONNECTION_IDLE_TIME));
2192 mutex_unlock(&local->mtx);
2195 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2196 struct ieee80211_hdr *hdr,
2199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2200 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2201 int ac = ieee80211_ac_from_tid(tid);
2202 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2203 unsigned long now = jiffies;
2205 if (likely(!tx_tspec->admitted_time))
2208 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2209 tx_tspec->consumed_tx_time = 0;
2210 tx_tspec->time_slice_start = now;
2212 if (tx_tspec->downgraded) {
2213 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2214 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2218 if (tx_tspec->downgraded)
2221 tx_tspec->consumed_tx_time += tx_time;
2223 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2224 tx_tspec->downgraded = true;
2225 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2226 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2230 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2231 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2233 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2235 if (!ieee80211_is_data(hdr->frame_control))
2238 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2239 sdata->u.mgd.probe_send_count > 0) {
2241 ieee80211_sta_reset_conn_monitor(sdata);
2243 sdata->u.mgd.nullfunc_failed = true;
2244 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2249 ieee80211_sta_reset_conn_monitor(sdata);
2252 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2254 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2256 u8 *dst = ifmgd->associated->bssid;
2257 u8 unicast_limit = max(1, max_probe_tries - 3);
2260 * Try sending broadcast probe requests for the last three
2261 * probe requests after the first ones failed since some
2262 * buggy APs only support broadcast probe requests.
2264 if (ifmgd->probe_send_count >= unicast_limit)
2268 * When the hardware reports an accurate Tx ACK status, it's
2269 * better to send a nullfunc frame instead of a probe request,
2270 * as it will kick us off the AP quickly if we aren't associated
2271 * anymore. The timeout will be reset if the frame is ACKed by
2274 ifmgd->probe_send_count++;
2276 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2277 ifmgd->nullfunc_failed = false;
2278 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2283 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2284 if (WARN_ON_ONCE(ssid == NULL))
2289 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2290 ssid + 2, ssid_len, NULL,
2291 0, (u32) -1, true, 0,
2292 ifmgd->associated->channel, false);
2296 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2297 run_again(sdata, ifmgd->probe_timeout);
2300 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2304 bool already = false;
2306 if (!ieee80211_sdata_running(sdata))
2311 if (!ifmgd->associated)
2314 mutex_lock(&sdata->local->mtx);
2316 if (sdata->local->tmp_channel || sdata->local->scanning) {
2317 mutex_unlock(&sdata->local->mtx);
2322 mlme_dbg_ratelimited(sdata,
2323 "detected beacon loss from AP (missed %d beacons) - probing\n",
2326 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2330 * The driver/our work has already reported this event or the
2331 * connection monitoring has kicked in and we have already sent
2332 * a probe request. Or maybe the AP died and the driver keeps
2333 * reporting until we disassociate...
2335 * In either case we have to ignore the current call to this
2336 * function (except for setting the correct probe reason bit)
2337 * because otherwise we would reset the timer every time and
2338 * never check whether we received a probe response!
2340 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2343 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2345 mutex_unlock(&sdata->local->mtx);
2350 mutex_lock(&sdata->local->iflist_mtx);
2351 ieee80211_recalc_ps(sdata->local, -1);
2352 mutex_unlock(&sdata->local->iflist_mtx);
2354 ifmgd->probe_send_count = 0;
2355 ieee80211_mgd_probe_ap_send(sdata);
2357 sdata_unlock(sdata);
2360 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2361 struct ieee80211_vif *vif)
2363 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2365 struct cfg80211_bss *cbss;
2366 struct sk_buff *skb;
2370 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2373 sdata_assert_lock(sdata);
2375 if (ifmgd->associated)
2376 cbss = ifmgd->associated;
2377 else if (ifmgd->auth_data)
2378 cbss = ifmgd->auth_data->bss;
2379 else if (ifmgd->assoc_data)
2380 cbss = ifmgd->assoc_data->bss;
2385 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2386 if (WARN_ON_ONCE(ssid == NULL))
2391 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2392 (u32) -1, cbss->channel,
2399 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2401 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2402 const u8 *buf, size_t len, bool tx,
2405 struct ieee80211_event event = {
2407 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2408 .u.mlme.reason = reason,
2412 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2414 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2416 drv_event_callback(sdata->local, sdata, &event);
2419 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2421 struct ieee80211_local *local = sdata->local;
2422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2423 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2426 if (!ifmgd->associated) {
2427 sdata_unlock(sdata);
2431 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2432 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2434 mutex_lock(&local->mtx);
2435 sdata->vif.csa_active = false;
2436 ifmgd->csa_waiting_bcn = false;
2437 if (sdata->csa_block_tx) {
2438 ieee80211_wake_vif_queues(local, sdata,
2439 IEEE80211_QUEUE_STOP_REASON_CSA);
2440 sdata->csa_block_tx = false;
2442 mutex_unlock(&local->mtx);
2444 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2445 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2447 sdata_unlock(sdata);
2450 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2452 struct ieee80211_sub_if_data *sdata =
2453 container_of(work, struct ieee80211_sub_if_data,
2454 u.mgd.beacon_connection_loss_work);
2455 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2456 struct sta_info *sta;
2458 if (ifmgd->associated) {
2460 sta = sta_info_get(sdata, ifmgd->bssid);
2462 sta->beacon_loss_count++;
2466 if (ifmgd->connection_loss) {
2467 sdata_info(sdata, "Connection to AP %pM lost\n",
2469 __ieee80211_disconnect(sdata);
2471 ieee80211_mgd_probe_ap(sdata, true);
2475 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2477 struct ieee80211_sub_if_data *sdata =
2478 container_of(work, struct ieee80211_sub_if_data,
2479 u.mgd.csa_connection_drop_work);
2481 __ieee80211_disconnect(sdata);
2484 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2486 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2487 struct ieee80211_hw *hw = &sdata->local->hw;
2489 trace_api_beacon_loss(sdata);
2491 sdata->u.mgd.connection_loss = false;
2492 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2494 EXPORT_SYMBOL(ieee80211_beacon_loss);
2496 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2498 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2499 struct ieee80211_hw *hw = &sdata->local->hw;
2501 trace_api_connection_loss(sdata);
2503 sdata->u.mgd.connection_loss = true;
2504 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2506 EXPORT_SYMBOL(ieee80211_connection_loss);
2509 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2512 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2514 sdata_assert_lock(sdata);
2518 * we are not authenticated yet, the only timer that could be
2519 * running is the timeout for the authentication response which
2520 * which is not relevant anymore.
2522 del_timer_sync(&sdata->u.mgd.timer);
2523 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2525 eth_zero_addr(sdata->u.mgd.bssid);
2526 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2527 sdata->u.mgd.flags = 0;
2528 mutex_lock(&sdata->local->mtx);
2529 ieee80211_vif_release_channel(sdata);
2530 mutex_unlock(&sdata->local->mtx);
2533 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2535 sdata->u.mgd.auth_data = NULL;
2538 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2541 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2543 sdata_assert_lock(sdata);
2547 * we are not associated yet, the only timer that could be
2548 * running is the timeout for the association response which
2549 * which is not relevant anymore.
2551 del_timer_sync(&sdata->u.mgd.timer);
2552 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2554 eth_zero_addr(sdata->u.mgd.bssid);
2555 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2556 sdata->u.mgd.flags = 0;
2557 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
2558 mutex_lock(&sdata->local->mtx);
2559 ieee80211_vif_release_channel(sdata);
2560 mutex_unlock(&sdata->local->mtx);
2564 sdata->u.mgd.assoc_data = NULL;
2567 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2568 struct ieee80211_mgmt *mgmt, size_t len)
2570 struct ieee80211_local *local = sdata->local;
2571 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2573 struct ieee802_11_elems elems;
2576 pos = mgmt->u.auth.variable;
2577 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2578 if (!elems.challenge)
2580 auth_data->expected_transaction = 4;
2581 drv_mgd_prepare_tx(sdata->local, sdata);
2582 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2583 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2584 IEEE80211_TX_INTFL_MLME_CONN_TX;
2585 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2586 elems.challenge - 2, elems.challenge_len + 2,
2587 auth_data->bss->bssid, auth_data->bss->bssid,
2588 auth_data->key, auth_data->key_len,
2589 auth_data->key_idx, tx_flags);
2592 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2593 struct ieee80211_mgmt *mgmt, size_t len)
2595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2597 u16 auth_alg, auth_transaction, status_code;
2598 struct sta_info *sta;
2599 struct ieee80211_event event = {
2601 .u.mlme.data = AUTH_EVENT,
2604 sdata_assert_lock(sdata);
2609 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2612 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2614 if (!ether_addr_equal(bssid, mgmt->bssid))
2617 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2618 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2619 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2621 if (auth_alg != ifmgd->auth_data->algorithm ||
2622 auth_transaction != ifmgd->auth_data->expected_transaction) {
2623 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2624 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2626 ifmgd->auth_data->expected_transaction);
2630 if (status_code != WLAN_STATUS_SUCCESS) {
2631 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2632 mgmt->sa, status_code);
2633 ieee80211_destroy_auth_data(sdata, false);
2634 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2635 event.u.mlme.status = MLME_DENIED;
2636 event.u.mlme.reason = status_code;
2637 drv_event_callback(sdata->local, sdata, &event);
2641 switch (ifmgd->auth_data->algorithm) {
2642 case WLAN_AUTH_OPEN:
2643 case WLAN_AUTH_LEAP:
2647 case WLAN_AUTH_SHARED_KEY:
2648 if (ifmgd->auth_data->expected_transaction != 4) {
2649 ieee80211_auth_challenge(sdata, mgmt, len);
2650 /* need another frame */
2655 WARN_ONCE(1, "invalid auth alg %d",
2656 ifmgd->auth_data->algorithm);
2660 event.u.mlme.status = MLME_SUCCESS;
2661 drv_event_callback(sdata->local, sdata, &event);
2662 sdata_info(sdata, "authenticated\n");
2663 ifmgd->auth_data->done = true;
2664 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2665 ifmgd->auth_data->timeout_started = true;
2666 run_again(sdata, ifmgd->auth_data->timeout);
2668 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2669 ifmgd->auth_data->expected_transaction != 2) {
2671 * Report auth frame to user space for processing since another
2672 * round of Authentication frames is still needed.
2674 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2678 /* move station state to auth */
2679 mutex_lock(&sdata->local->sta_mtx);
2680 sta = sta_info_get(sdata, bssid);
2682 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2685 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2686 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2689 mutex_unlock(&sdata->local->sta_mtx);
2691 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2694 mutex_unlock(&sdata->local->sta_mtx);
2695 /* ignore frame -- wait for timeout */
2698 #define case_WLAN(type) \
2699 case WLAN_REASON_##type: return #type
2701 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2703 switch (reason_code) {
2704 case_WLAN(UNSPECIFIED);
2705 case_WLAN(PREV_AUTH_NOT_VALID);
2706 case_WLAN(DEAUTH_LEAVING);
2707 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2708 case_WLAN(DISASSOC_AP_BUSY);
2709 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2710 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2711 case_WLAN(DISASSOC_STA_HAS_LEFT);
2712 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2713 case_WLAN(DISASSOC_BAD_POWER);
2714 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2715 case_WLAN(INVALID_IE);
2716 case_WLAN(MIC_FAILURE);
2717 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2718 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2719 case_WLAN(IE_DIFFERENT);
2720 case_WLAN(INVALID_GROUP_CIPHER);
2721 case_WLAN(INVALID_PAIRWISE_CIPHER);
2722 case_WLAN(INVALID_AKMP);
2723 case_WLAN(UNSUPP_RSN_VERSION);
2724 case_WLAN(INVALID_RSN_IE_CAP);
2725 case_WLAN(IEEE8021X_FAILED);
2726 case_WLAN(CIPHER_SUITE_REJECTED);
2727 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2728 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2729 case_WLAN(DISASSOC_LOW_ACK);
2730 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2731 case_WLAN(QSTA_LEAVE_QBSS);
2732 case_WLAN(QSTA_NOT_USE);
2733 case_WLAN(QSTA_REQUIRE_SETUP);
2734 case_WLAN(QSTA_TIMEOUT);
2735 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2736 case_WLAN(MESH_PEER_CANCELED);
2737 case_WLAN(MESH_MAX_PEERS);
2738 case_WLAN(MESH_CONFIG);
2739 case_WLAN(MESH_CLOSE);
2740 case_WLAN(MESH_MAX_RETRIES);
2741 case_WLAN(MESH_CONFIRM_TIMEOUT);
2742 case_WLAN(MESH_INVALID_GTK);
2743 case_WLAN(MESH_INCONSISTENT_PARAM);
2744 case_WLAN(MESH_INVALID_SECURITY);
2745 case_WLAN(MESH_PATH_ERROR);
2746 case_WLAN(MESH_PATH_NOFORWARD);
2747 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2748 case_WLAN(MAC_EXISTS_IN_MBSS);
2749 case_WLAN(MESH_CHAN_REGULATORY);
2750 case_WLAN(MESH_CHAN);
2751 default: return "<unknown>";
2755 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2756 struct ieee80211_mgmt *mgmt, size_t len)
2758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2759 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2761 sdata_assert_lock(sdata);
2766 if (ifmgd->associated &&
2767 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2768 const u8 *bssid = ifmgd->associated->bssid;
2770 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2772 ieee80211_get_reason_code_string(reason_code));
2774 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2776 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2781 if (ifmgd->assoc_data &&
2782 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2783 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2786 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2788 ieee80211_get_reason_code_string(reason_code));
2790 ieee80211_destroy_assoc_data(sdata, false);
2792 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2798 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2799 struct ieee80211_mgmt *mgmt, size_t len)
2801 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2804 sdata_assert_lock(sdata);
2809 if (!ifmgd->associated ||
2810 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2813 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2815 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2816 mgmt->sa, reason_code);
2818 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2820 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2823 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2824 u8 *supp_rates, unsigned int supp_rates_len,
2825 u32 *rates, u32 *basic_rates,
2826 bool *have_higher_than_11mbit,
2827 int *min_rate, int *min_rate_index,
2828 int shift, u32 rate_flags)
2832 for (i = 0; i < supp_rates_len; i++) {
2833 int rate = supp_rates[i] & 0x7f;
2834 bool is_basic = !!(supp_rates[i] & 0x80);
2836 if ((rate * 5 * (1 << shift)) > 110)
2837 *have_higher_than_11mbit = true;
2840 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2841 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2843 * Note: Even through the membership selector and the basic
2844 * rate flag share the same bit, they are not exactly
2847 if (!!(supp_rates[i] & 0x80) &&
2848 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2851 for (j = 0; j < sband->n_bitrates; j++) {
2852 struct ieee80211_rate *br;
2855 br = &sband->bitrates[j];
2856 if ((rate_flags & br->flags) != rate_flags)
2859 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2860 if (brate == rate) {
2863 *basic_rates |= BIT(j);
2864 if ((rate * 5) < *min_rate) {
2865 *min_rate = rate * 5;
2866 *min_rate_index = j;
2874 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2875 struct cfg80211_bss *cbss,
2876 struct ieee80211_mgmt *mgmt, size_t len)
2878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2879 struct ieee80211_local *local = sdata->local;
2880 struct ieee80211_supported_band *sband;
2881 struct sta_info *sta;
2883 u16 capab_info, aid;
2884 struct ieee802_11_elems elems;
2885 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2886 const struct cfg80211_bss_ies *bss_ies = NULL;
2887 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2892 /* AssocResp and ReassocResp have identical structure */
2894 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2895 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2897 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2898 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2900 aid &= ~(BIT(15) | BIT(14));
2902 ifmgd->broken_ap = false;
2904 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2905 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2908 ifmgd->broken_ap = true;
2911 pos = mgmt->u.assoc_resp.variable;
2912 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2914 if (!elems.supp_rates) {
2915 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2920 ifmgd->tdls_chan_switch_prohibited =
2921 elems.ext_capab && elems.ext_capab_len >= 5 &&
2922 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2925 * Some APs are erroneously not including some information in their
2926 * (re)association response frames. Try to recover by using the data
2927 * from the beacon or probe response. This seems to afflict mobile
2928 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2929 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2931 if ((assoc_data->wmm && !elems.wmm_param) ||
2932 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2933 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2934 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2935 (!elems.vht_cap_elem || !elems.vht_operation))) {
2936 const struct cfg80211_bss_ies *ies;
2937 struct ieee802_11_elems bss_elems;
2940 ies = rcu_dereference(cbss->ies);
2942 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2948 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2950 if (assoc_data->wmm &&
2951 !elems.wmm_param && bss_elems.wmm_param) {
2952 elems.wmm_param = bss_elems.wmm_param;
2954 "AP bug: WMM param missing from AssocResp\n");
2958 * Also check if we requested HT/VHT, otherwise the AP doesn't
2959 * have to include the IEs in the (re)association response.
2961 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2962 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2963 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2965 "AP bug: HT capability missing from AssocResp\n");
2967 if (!elems.ht_operation && bss_elems.ht_operation &&
2968 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2969 elems.ht_operation = bss_elems.ht_operation;
2971 "AP bug: HT operation missing from AssocResp\n");
2973 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2974 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2975 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2977 "AP bug: VHT capa missing from AssocResp\n");
2979 if (!elems.vht_operation && bss_elems.vht_operation &&
2980 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2981 elems.vht_operation = bss_elems.vht_operation;
2983 "AP bug: VHT operation missing from AssocResp\n");
2988 * We previously checked these in the beacon/probe response, so
2989 * they should be present here. This is just a safety net.
2991 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2992 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2994 "HT AP is missing WMM params or HT capability/operation\n");
2999 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3000 (!elems.vht_cap_elem || !elems.vht_operation)) {
3002 "VHT AP is missing VHT capability/operation\n");
3007 mutex_lock(&sdata->local->sta_mtx);
3009 * station info was already allocated and inserted before
3010 * the association and should be available to us
3012 sta = sta_info_get(sdata, cbss->bssid);
3013 if (WARN_ON(!sta)) {
3014 mutex_unlock(&sdata->local->sta_mtx);
3019 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
3021 /* Set up internal HT/VHT capabilities */
3022 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3023 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3024 elems.ht_cap_elem, sta);
3026 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3027 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3028 elems.vht_cap_elem, sta);
3031 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3032 * in their association response, so ignore that data for our own
3033 * configuration. If it changed since the last beacon, we'll get the
3034 * next beacon and update then.
3038 * If an operating mode notification IE is present, override the
3039 * NSS calculation (that would be done in rate_control_rate_init())
3040 * and use the # of streams from that element.
3042 if (elems.opmode_notif &&
3043 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3046 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3047 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3049 sta->sta.rx_nss = nss;
3052 rate_control_rate_init(sta);
3054 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
3055 set_sta_flag(sta, WLAN_STA_MFP);
3057 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3059 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3060 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3061 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3064 "failed to move station %pM to desired state\n",
3066 WARN_ON(__sta_info_destroy(sta));
3067 mutex_unlock(&sdata->local->sta_mtx);
3072 mutex_unlock(&sdata->local->sta_mtx);
3075 * Always handle WMM once after association regardless
3076 * of the first value the AP uses. Setting -1 here has
3077 * that effect because the AP values is an unsigned
3080 ifmgd->wmm_last_param_set = -1;
3082 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
3083 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3084 elems.wmm_param_len);
3086 ieee80211_set_wmm_default(sdata, false);
3087 changed |= BSS_CHANGED_QOS;
3089 /* set AID and assoc capability,
3090 * ieee80211_set_associated() will tell the driver */
3091 bss_conf->aid = aid;
3092 bss_conf->assoc_capability = capab_info;
3093 ieee80211_set_associated(sdata, cbss, changed);
3096 * If we're using 4-addr mode, let the AP know that we're
3097 * doing so, so that it can create the STA VLAN on its side
3099 if (ifmgd->use_4addr)
3100 ieee80211_send_4addr_nullfunc(local, sdata);
3103 * Start timer to probe the connection to the AP now.
3104 * Also start the timer that will detect beacon loss.
3106 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3107 ieee80211_sta_reset_beacon_monitor(sdata);
3115 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3116 struct ieee80211_mgmt *mgmt,
3119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3120 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3121 u16 capab_info, status_code, aid;
3122 struct ieee802_11_elems elems;
3123 int ac, uapsd_queues = -1;
3126 struct cfg80211_bss *bss;
3127 struct ieee80211_event event = {
3129 .u.mlme.data = ASSOC_EVENT,
3132 sdata_assert_lock(sdata);
3136 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3140 * AssocResp and ReassocResp have identical structure, so process both
3141 * of them in this function.
3147 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3148 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3149 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3150 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3153 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3154 reassoc ? "Rea" : "A", mgmt->sa,
3155 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3157 pos = mgmt->u.assoc_resp.variable;
3158 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3160 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3161 elems.timeout_int &&
3162 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3164 tu = le32_to_cpu(elems.timeout_int->value);
3165 ms = tu * 1024 / 1000;
3167 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3169 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3170 assoc_data->timeout_started = true;
3171 if (ms > IEEE80211_ASSOC_TIMEOUT)
3172 run_again(sdata, assoc_data->timeout);
3176 bss = assoc_data->bss;
3178 if (status_code != WLAN_STATUS_SUCCESS) {
3179 sdata_info(sdata, "%pM denied association (code=%d)\n",
3180 mgmt->sa, status_code);
3181 ieee80211_destroy_assoc_data(sdata, false);
3182 event.u.mlme.status = MLME_DENIED;
3183 event.u.mlme.reason = status_code;
3184 drv_event_callback(sdata->local, sdata, &event);
3186 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3187 /* oops -- internal error -- send timeout for now */
3188 ieee80211_destroy_assoc_data(sdata, false);
3189 cfg80211_assoc_timeout(sdata->dev, bss);
3192 event.u.mlme.status = MLME_SUCCESS;
3193 drv_event_callback(sdata->local, sdata, &event);
3194 sdata_info(sdata, "associated\n");
3197 * destroy assoc_data afterwards, as otherwise an idle
3198 * recalc after assoc_data is NULL but before associated
3199 * is set can cause the interface to go idle
3201 ieee80211_destroy_assoc_data(sdata, true);
3203 /* get uapsd queues configuration */
3205 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3206 if (sdata->tx_conf[ac].uapsd)
3207 uapsd_queues |= BIT(ac);
3210 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3213 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3214 struct ieee80211_mgmt *mgmt, size_t len,
3215 struct ieee80211_rx_status *rx_status,
3216 struct ieee802_11_elems *elems)
3218 struct ieee80211_local *local = sdata->local;
3219 struct ieee80211_bss *bss;
3220 struct ieee80211_channel *channel;
3222 sdata_assert_lock(sdata);
3224 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3228 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3231 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3232 ieee80211_rx_bss_put(local, bss);
3237 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3238 struct sk_buff *skb)
3240 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3241 struct ieee80211_if_managed *ifmgd;
3242 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3243 size_t baselen, len = skb->len;
3244 struct ieee802_11_elems elems;
3246 ifmgd = &sdata->u.mgd;
3248 sdata_assert_lock(sdata);
3250 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3251 return; /* ignore ProbeResp to foreign address */
3253 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3257 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3260 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3262 if (ifmgd->associated &&
3263 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3264 ieee80211_reset_ap_probe(sdata);
3268 * This is the canonical list of information elements we care about,
3269 * the filter code also gives us all changes to the Microsoft OUI
3270 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3271 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3272 * changes to requested client power.
3274 * We implement beacon filtering in software since that means we can
3275 * avoid processing the frame here and in cfg80211, and userspace
3276 * will not be able to tell whether the hardware supports it or not.
3278 * XXX: This list needs to be dynamic -- userspace needs to be able to
3279 * add items it requires. It also needs to be able to tell us to
3280 * look out for other vendor IEs.
3282 static const u64 care_about_ies =
3283 (1ULL << WLAN_EID_COUNTRY) |
3284 (1ULL << WLAN_EID_ERP_INFO) |
3285 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3286 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3287 (1ULL << WLAN_EID_HT_CAPABILITY) |
3288 (1ULL << WLAN_EID_HT_OPERATION) |
3289 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3291 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3292 struct ieee80211_mgmt *mgmt, size_t len,
3293 struct ieee80211_rx_status *rx_status)
3295 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3296 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3298 struct ieee802_11_elems elems;
3299 struct ieee80211_local *local = sdata->local;
3300 struct ieee80211_chanctx_conf *chanctx_conf;
3301 struct ieee80211_channel *chan;
3302 struct sta_info *sta;
3308 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3310 sdata_assert_lock(sdata);
3312 /* Process beacon from the current BSS */
3313 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3318 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3319 if (!chanctx_conf) {
3324 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3328 chan = chanctx_conf->def.chan;
3331 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3332 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3333 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3334 len - baselen, false, &elems);
3336 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3337 if (elems.tim && !elems.parse_error) {
3338 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3339 ifmgd->dtim_period = tim_ie->dtim_period;
3341 ifmgd->have_beacon = true;
3342 ifmgd->assoc_data->need_beacon = false;
3343 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3344 sdata->vif.bss_conf.sync_tsf =
3345 le64_to_cpu(mgmt->u.beacon.timestamp);
3346 sdata->vif.bss_conf.sync_device_ts =
3347 rx_status->device_timestamp;
3349 sdata->vif.bss_conf.sync_dtim_count =
3350 elems.tim->dtim_count;
3352 sdata->vif.bss_conf.sync_dtim_count = 0;
3354 /* continue assoc process */
3355 ifmgd->assoc_data->timeout = jiffies;
3356 ifmgd->assoc_data->timeout_started = true;
3357 run_again(sdata, ifmgd->assoc_data->timeout);
3361 if (!ifmgd->associated ||
3362 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3364 bssid = ifmgd->associated->bssid;
3366 /* Track average RSSI from the Beacon frames of the current AP */
3367 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3368 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3369 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3370 ifmgd->last_cqm_event_signal = 0;
3371 ifmgd->count_beacon_signal = 1;
3372 ifmgd->last_ave_beacon_signal = 0;
3374 ifmgd->ave_beacon_signal =
3375 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3376 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3377 ifmgd->ave_beacon_signal) / 16;
3378 ifmgd->count_beacon_signal++;
3381 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3382 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3383 int sig = ifmgd->ave_beacon_signal;
3384 int last_sig = ifmgd->last_ave_beacon_signal;
3385 struct ieee80211_event event = {
3390 * if signal crosses either of the boundaries, invoke callback
3391 * with appropriate parameters
3393 if (sig > ifmgd->rssi_max_thold &&
3394 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3395 ifmgd->last_ave_beacon_signal = sig;
3396 event.u.rssi.data = RSSI_EVENT_HIGH;
3397 drv_event_callback(local, sdata, &event);
3398 } else if (sig < ifmgd->rssi_min_thold &&
3399 (last_sig >= ifmgd->rssi_max_thold ||
3401 ifmgd->last_ave_beacon_signal = sig;
3402 event.u.rssi.data = RSSI_EVENT_LOW;
3403 drv_event_callback(local, sdata, &event);
3407 if (bss_conf->cqm_rssi_thold &&
3408 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3409 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3410 int sig = ifmgd->ave_beacon_signal / 16;
3411 int last_event = ifmgd->last_cqm_event_signal;
3412 int thold = bss_conf->cqm_rssi_thold;
3413 int hyst = bss_conf->cqm_rssi_hyst;
3415 (last_event == 0 || sig < last_event - hyst)) {
3416 ifmgd->last_cqm_event_signal = sig;
3417 ieee80211_cqm_rssi_notify(
3419 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3421 } else if (sig > thold &&
3422 (last_event == 0 || sig > last_event + hyst)) {
3423 ifmgd->last_cqm_event_signal = sig;
3424 ieee80211_cqm_rssi_notify(
3426 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3431 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3432 mlme_dbg_ratelimited(sdata,
3433 "cancelling AP probe due to a received beacon\n");
3434 ieee80211_reset_ap_probe(sdata);
3438 * Push the beacon loss detection into the future since
3439 * we are processing a beacon from the AP just now.
3441 ieee80211_sta_reset_beacon_monitor(sdata);
3443 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3444 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3445 len - baselen, false, &elems,
3446 care_about_ies, ncrc);
3448 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) {
3449 bool directed_tim = ieee80211_check_tim(elems.tim,
3453 if (local->hw.conf.dynamic_ps_timeout > 0) {
3454 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3455 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3456 ieee80211_hw_config(local,
3457 IEEE80211_CONF_CHANGE_PS);
3459 ieee80211_send_nullfunc(local, sdata, 0);
3460 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3461 local->pspolling = true;
3464 * Here is assumed that the driver will be
3465 * able to send ps-poll frame and receive a
3466 * response even though power save mode is
3467 * enabled, but some drivers might require
3468 * to disable power save here. This needs
3469 * to be investigated.
3471 ieee80211_send_pspoll(local, sdata);
3476 if (sdata->vif.p2p) {
3477 struct ieee80211_p2p_noa_attr noa = {};
3480 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3482 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3483 (u8 *) &noa, sizeof(noa));
3485 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3486 /* valid noa_attr and index changed */
3487 sdata->u.mgd.p2p_noa_index = noa.index;
3488 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3489 changed |= BSS_CHANGED_P2P_PS;
3491 * make sure we update all information, the CRC
3492 * mechanism doesn't look at P2P attributes.
3494 ifmgd->beacon_crc_valid = false;
3496 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3497 /* noa_attr not found and we had valid noa_attr before */
3498 sdata->u.mgd.p2p_noa_index = -1;
3499 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3500 changed |= BSS_CHANGED_P2P_PS;
3501 ifmgd->beacon_crc_valid = false;
3505 if (ifmgd->csa_waiting_bcn)
3506 ieee80211_chswitch_post_beacon(sdata);
3509 * Update beacon timing and dtim count on every beacon appearance. This
3510 * will allow the driver to use the most updated values. Do it before
3511 * comparing this one with last received beacon.
3512 * IMPORTANT: These parameters would possibly be out of sync by the time
3513 * the driver will use them. The synchronized view is currently
3514 * guaranteed only in certain callbacks.
3516 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3517 sdata->vif.bss_conf.sync_tsf =
3518 le64_to_cpu(mgmt->u.beacon.timestamp);
3519 sdata->vif.bss_conf.sync_device_ts =
3520 rx_status->device_timestamp;
3522 sdata->vif.bss_conf.sync_dtim_count =
3523 elems.tim->dtim_count;
3525 sdata->vif.bss_conf.sync_dtim_count = 0;
3528 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3530 ifmgd->beacon_crc = ncrc;
3531 ifmgd->beacon_crc_valid = true;
3533 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3535 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3536 rx_status->device_timestamp,
3539 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3540 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3541 elems.wmm_param_len))
3542 changed |= BSS_CHANGED_QOS;
3545 * If we haven't had a beacon before, tell the driver about the
3546 * DTIM period (and beacon timing if desired) now.
3548 if (!ifmgd->have_beacon) {
3549 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3551 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3553 bss_conf->dtim_period = 1;
3555 changed |= BSS_CHANGED_BEACON_INFO;
3556 ifmgd->have_beacon = true;
3558 mutex_lock(&local->iflist_mtx);
3559 ieee80211_recalc_ps(local, -1);
3560 mutex_unlock(&local->iflist_mtx);
3562 ieee80211_recalc_ps_vif(sdata);
3565 if (elems.erp_info) {
3567 erp_value = elems.erp_info[0];
3571 changed |= ieee80211_handle_bss_capability(sdata,
3572 le16_to_cpu(mgmt->u.beacon.capab_info),
3573 erp_valid, erp_value);
3575 mutex_lock(&local->sta_mtx);
3576 sta = sta_info_get(sdata, bssid);
3578 if (ieee80211_config_bw(sdata, sta,
3579 elems.ht_cap_elem, elems.ht_operation,
3580 elems.vht_operation, bssid, &changed)) {
3581 mutex_unlock(&local->sta_mtx);
3582 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3583 WLAN_REASON_DEAUTH_LEAVING,
3585 ieee80211_report_disconnect(sdata, deauth_buf,
3586 sizeof(deauth_buf), true,
3587 WLAN_REASON_DEAUTH_LEAVING);
3591 if (sta && elems.opmode_notif)
3592 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3593 rx_status->band, true);
3594 mutex_unlock(&local->sta_mtx);
3596 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3598 elems.country_elem_len,
3599 elems.pwr_constr_elem,
3600 elems.cisco_dtpc_elem);
3602 ieee80211_bss_info_change_notify(sdata, changed);
3605 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3606 struct sk_buff *skb)
3608 struct ieee80211_rx_status *rx_status;
3609 struct ieee80211_mgmt *mgmt;
3611 struct ieee802_11_elems elems;
3614 rx_status = (struct ieee80211_rx_status *) skb->cb;
3615 mgmt = (struct ieee80211_mgmt *) skb->data;
3616 fc = le16_to_cpu(mgmt->frame_control);
3620 switch (fc & IEEE80211_FCTL_STYPE) {
3621 case IEEE80211_STYPE_BEACON:
3622 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3624 case IEEE80211_STYPE_PROBE_RESP:
3625 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3627 case IEEE80211_STYPE_AUTH:
3628 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3630 case IEEE80211_STYPE_DEAUTH:
3631 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3633 case IEEE80211_STYPE_DISASSOC:
3634 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3636 case IEEE80211_STYPE_ASSOC_RESP:
3637 case IEEE80211_STYPE_REASSOC_RESP:
3638 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3640 case IEEE80211_STYPE_ACTION:
3641 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3642 ies_len = skb->len -
3643 offsetof(struct ieee80211_mgmt,
3644 u.action.u.chan_switch.variable);
3649 ieee802_11_parse_elems(
3650 mgmt->u.action.u.chan_switch.variable,
3651 ies_len, true, &elems);
3653 if (elems.parse_error)
3656 ieee80211_sta_process_chanswitch(sdata,
3658 rx_status->device_timestamp,
3660 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3661 ies_len = skb->len -
3662 offsetof(struct ieee80211_mgmt,
3663 u.action.u.ext_chan_switch.variable);
3668 ieee802_11_parse_elems(
3669 mgmt->u.action.u.ext_chan_switch.variable,
3670 ies_len, true, &elems);
3672 if (elems.parse_error)
3675 /* for the handling code pretend this was also an IE */
3676 elems.ext_chansw_ie =
3677 &mgmt->u.action.u.ext_chan_switch.data;
3679 ieee80211_sta_process_chanswitch(sdata,
3681 rx_status->device_timestamp,
3686 sdata_unlock(sdata);
3689 static void ieee80211_sta_timer(unsigned long data)
3691 struct ieee80211_sub_if_data *sdata =
3692 (struct ieee80211_sub_if_data *) data;
3694 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3697 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3698 u8 *bssid, u8 reason, bool tx)
3700 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3702 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3705 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3709 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
3711 struct ieee80211_local *local = sdata->local;
3712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3713 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3718 sdata_assert_lock(sdata);
3720 if (WARN_ON_ONCE(!auth_data))
3725 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3726 sdata_info(sdata, "authentication with %pM timed out\n",
3727 auth_data->bss->bssid);
3730 * Most likely AP is not in the range so remove the
3731 * bss struct for that AP.
3733 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3738 drv_mgd_prepare_tx(local, sdata);
3740 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3741 auth_data->bss->bssid, auth_data->tries,
3742 IEEE80211_AUTH_MAX_TRIES);
3744 auth_data->expected_transaction = 2;
3746 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3747 trans = auth_data->sae_trans;
3748 status = auth_data->sae_status;
3749 auth_data->expected_transaction = trans;
3752 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3753 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3754 IEEE80211_TX_INTFL_MLME_CONN_TX;
3756 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3757 auth_data->data, auth_data->data_len,
3758 auth_data->bss->bssid,
3759 auth_data->bss->bssid, NULL, 0, 0,
3762 if (tx_flags == 0) {
3763 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3764 auth_data->timeout_started = true;
3765 run_again(sdata, auth_data->timeout);
3767 auth_data->timeout =
3768 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3769 auth_data->timeout_started = true;
3770 run_again(sdata, auth_data->timeout);
3776 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3778 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3779 struct ieee80211_local *local = sdata->local;
3781 sdata_assert_lock(sdata);
3783 assoc_data->tries++;
3784 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3785 sdata_info(sdata, "association with %pM timed out\n",
3786 assoc_data->bss->bssid);
3789 * Most likely AP is not in the range so remove the
3790 * bss struct for that AP.
3792 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3797 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3798 assoc_data->bss->bssid, assoc_data->tries,
3799 IEEE80211_ASSOC_MAX_TRIES);
3800 ieee80211_send_assoc(sdata);
3802 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3803 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3804 assoc_data->timeout_started = true;
3805 run_again(sdata, assoc_data->timeout);
3807 assoc_data->timeout =
3808 round_jiffies_up(jiffies +
3809 IEEE80211_ASSOC_TIMEOUT_LONG);
3810 assoc_data->timeout_started = true;
3811 run_again(sdata, assoc_data->timeout);
3817 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3818 __le16 fc, bool acked)
3820 struct ieee80211_local *local = sdata->local;
3822 sdata->u.mgd.status_fc = fc;
3823 sdata->u.mgd.status_acked = acked;
3824 sdata->u.mgd.status_received = true;
3826 ieee80211_queue_work(&local->hw, &sdata->work);
3829 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3831 struct ieee80211_local *local = sdata->local;
3832 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3836 if (ifmgd->status_received) {
3837 __le16 fc = ifmgd->status_fc;
3838 bool status_acked = ifmgd->status_acked;
3840 ifmgd->status_received = false;
3841 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
3843 ifmgd->auth_data->timeout =
3844 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3845 run_again(sdata, ifmgd->auth_data->timeout);
3847 ifmgd->auth_data->timeout = jiffies - 1;
3849 ifmgd->auth_data->timeout_started = true;
3850 } else if (ifmgd->assoc_data &&
3851 (ieee80211_is_assoc_req(fc) ||
3852 ieee80211_is_reassoc_req(fc))) {
3854 ifmgd->assoc_data->timeout =
3855 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3856 run_again(sdata, ifmgd->assoc_data->timeout);
3858 ifmgd->assoc_data->timeout = jiffies - 1;
3860 ifmgd->assoc_data->timeout_started = true;
3864 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3865 time_after(jiffies, ifmgd->auth_data->timeout)) {
3866 if (ifmgd->auth_data->done) {
3868 * ok ... we waited for assoc but userspace didn't,
3869 * so let's just kill the auth data
3871 ieee80211_destroy_auth_data(sdata, false);
3872 } else if (ieee80211_auth(sdata)) {
3874 struct ieee80211_event event = {
3876 .u.mlme.data = AUTH_EVENT,
3877 .u.mlme.status = MLME_TIMEOUT,
3880 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3882 ieee80211_destroy_auth_data(sdata, false);
3884 cfg80211_auth_timeout(sdata->dev, bssid);
3885 drv_event_callback(sdata->local, sdata, &event);
3887 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3888 run_again(sdata, ifmgd->auth_data->timeout);
3890 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3891 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3892 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3893 ieee80211_do_assoc(sdata)) {
3894 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3895 struct ieee80211_event event = {
3897 .u.mlme.data = ASSOC_EVENT,
3898 .u.mlme.status = MLME_TIMEOUT,
3901 ieee80211_destroy_assoc_data(sdata, false);
3902 cfg80211_assoc_timeout(sdata->dev, bss);
3903 drv_event_callback(sdata->local, sdata, &event);
3905 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3906 run_again(sdata, ifmgd->assoc_data->timeout);
3908 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3909 ifmgd->associated) {
3913 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3915 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3916 max_tries = max_nullfunc_tries;
3918 max_tries = max_probe_tries;
3920 /* ACK received for nullfunc probing frame */
3921 if (!ifmgd->probe_send_count)
3922 ieee80211_reset_ap_probe(sdata);
3923 else if (ifmgd->nullfunc_failed) {
3924 if (ifmgd->probe_send_count < max_tries) {
3926 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3927 bssid, ifmgd->probe_send_count,
3929 ieee80211_mgd_probe_ap_send(sdata);
3932 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3934 ieee80211_sta_connection_lost(sdata, bssid,
3935 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3938 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3939 run_again(sdata, ifmgd->probe_timeout);
3940 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
3942 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3943 bssid, probe_wait_ms);
3944 ieee80211_sta_connection_lost(sdata, bssid,
3945 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3946 } else if (ifmgd->probe_send_count < max_tries) {
3948 "No probe response from AP %pM after %dms, try %d/%i\n",
3949 bssid, probe_wait_ms,
3950 ifmgd->probe_send_count, max_tries);
3951 ieee80211_mgd_probe_ap_send(sdata);
3954 * We actually lost the connection ... or did we?
3957 wiphy_debug(local->hw.wiphy,
3958 "%s: No probe response from AP %pM"
3959 " after %dms, disconnecting.\n",
3961 bssid, probe_wait_ms);
3963 ieee80211_sta_connection_lost(sdata, bssid,
3964 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3968 sdata_unlock(sdata);
3971 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3973 struct ieee80211_sub_if_data *sdata =
3974 (struct ieee80211_sub_if_data *) data;
3975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3977 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3980 sdata->u.mgd.connection_loss = false;
3981 ieee80211_queue_work(&sdata->local->hw,
3982 &sdata->u.mgd.beacon_connection_loss_work);
3985 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3987 struct ieee80211_sub_if_data *sdata =
3988 (struct ieee80211_sub_if_data *) data;
3989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3990 struct ieee80211_local *local = sdata->local;
3992 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3995 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3998 static void ieee80211_sta_monitor_work(struct work_struct *work)
4000 struct ieee80211_sub_if_data *sdata =
4001 container_of(work, struct ieee80211_sub_if_data,
4002 u.mgd.monitor_work);
4004 ieee80211_mgd_probe_ap(sdata, false);
4007 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4009 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4010 __ieee80211_stop_poll(sdata);
4012 /* let's probe the connection once */
4013 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4014 ieee80211_queue_work(&sdata->local->hw,
4015 &sdata->u.mgd.monitor_work);
4016 /* and do all the other regular work too */
4017 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4022 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4025 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4029 if (ifmgd->auth_data || ifmgd->assoc_data) {
4030 const u8 *bssid = ifmgd->auth_data ?
4031 ifmgd->auth_data->bss->bssid :
4032 ifmgd->assoc_data->bss->bssid;
4035 * If we are trying to authenticate / associate while suspending,
4036 * cfg80211 won't know and won't actually abort those attempts,
4037 * thus we need to do that ourselves.
4039 ieee80211_send_deauth_disassoc(sdata, bssid,
4040 IEEE80211_STYPE_DEAUTH,
4041 WLAN_REASON_DEAUTH_LEAVING,
4043 if (ifmgd->assoc_data)
4044 ieee80211_destroy_assoc_data(sdata, false);
4045 if (ifmgd->auth_data)
4046 ieee80211_destroy_auth_data(sdata, false);
4047 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4048 IEEE80211_DEAUTH_FRAME_LEN);
4051 /* This is a bit of a hack - we should find a better and more generic
4052 * solution to this. Normally when suspending, cfg80211 will in fact
4053 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4054 * auth (not so important) or assoc (this is the problem) process.
4056 * As a consequence, it can happen that we are in the process of both
4057 * associating and suspending, and receive an association response
4058 * after cfg80211 has checked if it needs to disconnect, but before
4059 * we actually set the flag to drop incoming frames. This will then
4060 * cause the workqueue flush to process the association response in
4061 * the suspend, resulting in a successful association just before it
4062 * tries to remove the interface from the driver, which now though
4063 * has a channel context assigned ... this results in issues.
4065 * To work around this (for now) simply deauth here again if we're
4068 if (ifmgd->associated && !sdata->local->wowlan) {
4070 struct cfg80211_deauth_request req = {
4071 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4075 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4076 ieee80211_mgd_deauth(sdata, &req);
4079 sdata_unlock(sdata);
4082 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4087 if (!ifmgd->associated) {
4088 sdata_unlock(sdata);
4092 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4093 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4094 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4095 ieee80211_sta_connection_lost(sdata,
4096 ifmgd->associated->bssid,
4097 WLAN_REASON_UNSPECIFIED,
4099 sdata_unlock(sdata);
4102 sdata_unlock(sdata);
4106 /* interface setup */
4107 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4109 struct ieee80211_if_managed *ifmgd;
4111 ifmgd = &sdata->u.mgd;
4112 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4113 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4114 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4115 ieee80211_beacon_connection_loss_work);
4116 INIT_WORK(&ifmgd->csa_connection_drop_work,
4117 ieee80211_csa_connection_drop_work);
4118 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4119 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4120 ieee80211_tdls_peer_del_work);
4121 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4122 (unsigned long) sdata);
4123 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4124 (unsigned long) sdata);
4125 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4126 (unsigned long) sdata);
4127 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4128 (unsigned long) sdata);
4129 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4130 ieee80211_sta_handle_tspec_ac_params_wk);
4133 ifmgd->powersave = sdata->wdev.ps;
4134 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4135 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4136 ifmgd->p2p_noa_index = -1;
4138 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4139 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4141 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4143 /* Setup TDLS data */
4144 spin_lock_init(&ifmgd->teardown_lock);
4145 ifmgd->teardown_skb = NULL;
4146 ifmgd->orig_teardown_skb = NULL;
4149 /* scan finished notification */
4150 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4152 struct ieee80211_sub_if_data *sdata;
4154 /* Restart STA timers */
4156 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4157 if (ieee80211_sdata_running(sdata))
4158 ieee80211_restart_sta_timer(sdata);
4163 int ieee80211_max_network_latency(struct notifier_block *nb,
4164 unsigned long data, void *dummy)
4166 s32 latency_usec = (s32) data;
4167 struct ieee80211_local *local =
4168 container_of(nb, struct ieee80211_local,
4169 network_latency_notifier);
4171 mutex_lock(&local->iflist_mtx);
4172 ieee80211_recalc_ps(local, latency_usec);
4173 mutex_unlock(&local->iflist_mtx);
4178 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4179 struct cfg80211_bss *cbss)
4181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4182 const u8 *ht_cap_ie, *vht_cap_ie;
4183 const struct ieee80211_ht_cap *ht_cap;
4184 const struct ieee80211_vht_cap *vht_cap;
4187 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4190 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4191 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4192 ht_cap = (void *)(ht_cap_ie + 2);
4193 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4195 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4196 * "Tx Unequal Modulation Supported" fields.
4200 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4203 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4204 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4208 vht_cap = (void *)(vht_cap_ie + 2);
4209 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4210 for (nss = 8; nss > 0; nss--) {
4211 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4212 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4215 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4216 chains = max(chains, nss);
4222 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4223 struct cfg80211_bss *cbss)
4225 struct ieee80211_local *local = sdata->local;
4226 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4227 const struct ieee80211_ht_cap *ht_cap = NULL;
4228 const struct ieee80211_ht_operation *ht_oper = NULL;
4229 const struct ieee80211_vht_operation *vht_oper = NULL;
4230 struct ieee80211_supported_band *sband;
4231 struct cfg80211_chan_def chandef;
4234 sband = local->hw.wiphy->bands[cbss->channel->band];
4236 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4237 IEEE80211_STA_DISABLE_80P80MHZ |
4238 IEEE80211_STA_DISABLE_160MHZ);
4242 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4243 sband->ht_cap.ht_supported) {
4244 const u8 *ht_oper_ie, *ht_cap_ie;
4246 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4247 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4248 ht_oper = (void *)(ht_oper_ie + 2);
4250 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4251 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4252 ht_cap = (void *)(ht_cap_ie + 2);
4255 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4260 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4261 sband->vht_cap.vht_supported) {
4262 const u8 *vht_oper_ie, *vht_cap;
4264 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4265 WLAN_EID_VHT_OPERATION);
4266 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4267 vht_oper = (void *)(vht_oper_ie + 2);
4268 if (vht_oper && !ht_oper) {
4271 "AP advertised VHT without HT, disabling both\n");
4272 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4273 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4276 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4277 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4278 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4283 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4285 ht_cap, ht_oper, vht_oper,
4288 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4293 /* will change later if needed */
4294 sdata->smps_mode = IEEE80211_SMPS_OFF;
4296 mutex_lock(&local->mtx);
4298 * If this fails (possibly due to channel context sharing
4299 * on incompatible channels, e.g. 80+80 and 160 sharing the
4300 * same control channel) try to use a smaller bandwidth.
4302 ret = ieee80211_vif_use_channel(sdata, &chandef,
4303 IEEE80211_CHANCTX_SHARED);
4305 /* don't downgrade for 5 and 10 MHz channels, though. */
4306 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4307 chandef.width == NL80211_CHAN_WIDTH_10)
4310 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4311 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4312 ret = ieee80211_vif_use_channel(sdata, &chandef,
4313 IEEE80211_CHANCTX_SHARED);
4316 mutex_unlock(&local->mtx);
4320 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4321 struct cfg80211_bss *cbss, bool assoc,
4324 struct ieee80211_local *local = sdata->local;
4325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4326 struct ieee80211_bss *bss = (void *)cbss->priv;
4327 struct sta_info *new_sta = NULL;
4328 struct ieee80211_supported_band *sband;
4329 bool have_sta = false;
4332 sband = local->hw.wiphy->bands[cbss->channel->band];
4334 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4339 have_sta = sta_info_get(sdata, cbss->bssid);
4344 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4349 if (new_sta || override) {
4350 err = ieee80211_prep_channel(sdata, cbss);
4353 sta_info_free(local, new_sta);
4359 u32 rates = 0, basic_rates = 0;
4360 bool have_higher_than_11mbit;
4361 int min_rate = INT_MAX, min_rate_index = -1;
4362 struct ieee80211_chanctx_conf *chanctx_conf;
4363 const struct cfg80211_bss_ies *ies;
4364 int shift = ieee80211_vif_get_shift(&sdata->vif);
4368 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4369 if (WARN_ON(!chanctx_conf)) {
4371 sta_info_free(local, new_sta);
4374 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4377 ieee80211_get_rates(sband, bss->supp_rates,
4378 bss->supp_rates_len,
4379 &rates, &basic_rates,
4380 &have_higher_than_11mbit,
4381 &min_rate, &min_rate_index,
4385 * This used to be a workaround for basic rates missing
4386 * in the association response frame. Now that we no
4387 * longer use the basic rates from there, it probably
4388 * doesn't happen any more, but keep the workaround so
4389 * in case some *other* APs are buggy in different ways
4390 * we can connect -- with a warning.
4392 if (!basic_rates && min_rate_index >= 0) {
4394 "No basic rates, using min rate instead\n");
4395 basic_rates = BIT(min_rate_index);
4398 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4399 sdata->vif.bss_conf.basic_rates = basic_rates;
4401 /* cf. IEEE 802.11 9.2.12 */
4402 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4403 have_higher_than_11mbit)
4404 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4406 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4408 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4410 /* set timing information */
4411 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4413 ies = rcu_dereference(cbss->beacon_ies);
4417 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4418 sdata->vif.bss_conf.sync_device_ts =
4419 bss->device_ts_beacon;
4420 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4421 ies->data, ies->len);
4422 if (tim_ie && tim_ie[1] >= 2)
4423 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4425 sdata->vif.bss_conf.sync_dtim_count = 0;
4426 } else if (!ieee80211_hw_check(&sdata->local->hw,
4427 TIMING_BEACON_ONLY)) {
4428 ies = rcu_dereference(cbss->proberesp_ies);
4429 /* must be non-NULL since beacon IEs were NULL */
4430 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4431 sdata->vif.bss_conf.sync_device_ts =
4432 bss->device_ts_presp;
4433 sdata->vif.bss_conf.sync_dtim_count = 0;
4435 sdata->vif.bss_conf.sync_tsf = 0;
4436 sdata->vif.bss_conf.sync_device_ts = 0;
4437 sdata->vif.bss_conf.sync_dtim_count = 0;
4441 /* tell driver about BSSID, basic rates and timing */
4442 ieee80211_bss_info_change_notify(sdata,
4443 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4444 BSS_CHANGED_BEACON_INT);
4447 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4449 err = sta_info_insert(new_sta);
4453 "failed to insert STA entry for the AP (error %d)\n",
4458 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4460 /* Cancel scan to ensure that nothing interferes with connection */
4461 if (local->scanning)
4462 ieee80211_scan_cancel(local);
4468 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4469 struct cfg80211_auth_request *req)
4471 struct ieee80211_local *local = sdata->local;
4472 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4473 struct ieee80211_mgd_auth_data *auth_data;
4477 /* prepare auth data structure */
4479 switch (req->auth_type) {
4480 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4481 auth_alg = WLAN_AUTH_OPEN;
4483 case NL80211_AUTHTYPE_SHARED_KEY:
4484 if (IS_ERR(local->wep_tx_tfm))
4486 auth_alg = WLAN_AUTH_SHARED_KEY;
4488 case NL80211_AUTHTYPE_FT:
4489 auth_alg = WLAN_AUTH_FT;
4491 case NL80211_AUTHTYPE_NETWORK_EAP:
4492 auth_alg = WLAN_AUTH_LEAP;
4494 case NL80211_AUTHTYPE_SAE:
4495 auth_alg = WLAN_AUTH_SAE;
4501 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4502 req->ie_len, GFP_KERNEL);
4506 auth_data->bss = req->bss;
4508 if (req->sae_data_len >= 4) {
4509 __le16 *pos = (__le16 *) req->sae_data;
4510 auth_data->sae_trans = le16_to_cpu(pos[0]);
4511 auth_data->sae_status = le16_to_cpu(pos[1]);
4512 memcpy(auth_data->data, req->sae_data + 4,
4513 req->sae_data_len - 4);
4514 auth_data->data_len += req->sae_data_len - 4;
4517 if (req->ie && req->ie_len) {
4518 memcpy(&auth_data->data[auth_data->data_len],
4519 req->ie, req->ie_len);
4520 auth_data->data_len += req->ie_len;
4523 if (req->key && req->key_len) {
4524 auth_data->key_len = req->key_len;
4525 auth_data->key_idx = req->key_idx;
4526 memcpy(auth_data->key, req->key, req->key_len);
4529 auth_data->algorithm = auth_alg;
4531 /* try to authenticate/probe */
4533 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4534 ifmgd->assoc_data) {
4539 if (ifmgd->auth_data)
4540 ieee80211_destroy_auth_data(sdata, false);
4542 /* prep auth_data so we don't go into idle on disassoc */
4543 ifmgd->auth_data = auth_data;
4545 if (ifmgd->associated) {
4546 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4548 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4549 WLAN_REASON_UNSPECIFIED,
4552 ieee80211_report_disconnect(sdata, frame_buf,
4553 sizeof(frame_buf), true,
4554 WLAN_REASON_UNSPECIFIED);
4557 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4559 err = ieee80211_prep_connection(sdata, req->bss, false, false);
4563 err = ieee80211_auth(sdata);
4565 sta_info_destroy_addr(sdata, req->bss->bssid);
4569 /* hold our own reference */
4570 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4574 eth_zero_addr(ifmgd->bssid);
4575 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4576 ifmgd->auth_data = NULL;
4577 mutex_lock(&sdata->local->mtx);
4578 ieee80211_vif_release_channel(sdata);
4579 mutex_unlock(&sdata->local->mtx);
4585 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4586 const u8 *wmm_param, int len)
4594 if (wmm_param[5] != 1 /* version */)
4597 pos = wmm_param + 8;
4600 for (; left >= 4; left -= 4, pos += 4) {
4601 u8 aifsn = pos[0] & 0x0f;
4602 u8 ecwmin = pos[1] & 0x0f;
4603 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4604 int aci = (pos[0] >> 5) & 0x03;
4608 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4612 if (ecwmin > ecwmax) {
4614 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4615 ecwmin, ecwmax, aci);
4623 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4624 struct cfg80211_assoc_request *req)
4626 struct ieee80211_local *local = sdata->local;
4627 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4628 struct ieee80211_bss *bss = (void *)req->bss->priv;
4629 struct ieee80211_mgd_assoc_data *assoc_data;
4630 const struct cfg80211_bss_ies *beacon_ies;
4631 struct ieee80211_supported_band *sband;
4632 const u8 *ssidie, *ht_ie, *vht_ie;
4634 bool override = false;
4636 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4641 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4647 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4648 assoc_data->ssid_len = ssidie[1];
4651 if (ifmgd->associated) {
4652 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4654 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4655 WLAN_REASON_UNSPECIFIED,
4658 ieee80211_report_disconnect(sdata, frame_buf,
4659 sizeof(frame_buf), true,
4660 WLAN_REASON_UNSPECIFIED);
4663 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4668 if (ifmgd->assoc_data) {
4673 if (ifmgd->auth_data) {
4676 /* keep sta info, bssid if matching */
4677 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4678 ieee80211_destroy_auth_data(sdata, match);
4681 /* prepare assoc data */
4683 ifmgd->beacon_crc_valid = false;
4685 assoc_data->wmm = bss->wmm_used &&
4686 (local->hw.queues >= IEEE80211_NUM_ACS);
4687 if (assoc_data->wmm) {
4688 /* try to check validity of WMM params IE */
4689 const struct cfg80211_bss_ies *ies;
4690 const u8 *wp, *start, *end;
4693 ies = rcu_dereference(req->bss->ies);
4695 end = start + ies->len;
4698 wp = cfg80211_find_vendor_ie(
4700 WLAN_OUI_TYPE_MICROSOFT_WMM,
4701 start, end - start);
4704 start = wp + wp[1] + 2;
4705 /* if this IE is too short, try the next */
4708 /* if this IE is WMM params, we found what we wanted */
4713 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4715 assoc_data->wmm = false;
4716 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4722 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4723 * We still associate in non-HT mode (11a/b/g) if any one of these
4724 * ciphers is configured as pairwise.
4725 * We can set this to true for non-11n hardware, that'll be checked
4726 * separately along with the peer capabilities.
4728 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4729 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4730 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4731 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4732 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4733 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4734 netdev_info(sdata->dev,
4735 "disabling HT/VHT due to WEP/TKIP use\n");
4739 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4740 sband = local->hw.wiphy->bands[req->bss->channel->band];
4741 if (!sband->ht_cap.ht_supported ||
4742 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4743 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4744 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4745 if (!bss->wmm_used &&
4746 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4747 netdev_info(sdata->dev,
4748 "disabling HT as WMM/QoS is not supported by the AP\n");
4751 /* disable VHT if we don't support it or the AP doesn't use WMM */
4752 if (!sband->vht_cap.vht_supported ||
4753 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4754 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4755 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4756 if (!bss->wmm_used &&
4757 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4758 netdev_info(sdata->dev,
4759 "disabling VHT as WMM/QoS is not supported by the AP\n");
4762 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4763 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4764 sizeof(ifmgd->ht_capa_mask));
4766 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4767 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4768 sizeof(ifmgd->vht_capa_mask));
4770 if (req->ie && req->ie_len) {
4771 memcpy(assoc_data->ie, req->ie, req->ie_len);
4772 assoc_data->ie_len = req->ie_len;
4775 assoc_data->bss = req->bss;
4777 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4778 if (ifmgd->powersave)
4779 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4781 sdata->smps_mode = IEEE80211_SMPS_OFF;
4783 sdata->smps_mode = ifmgd->req_smps;
4785 assoc_data->capability = req->bss->capability;
4786 assoc_data->supp_rates = bss->supp_rates;
4787 assoc_data->supp_rates_len = bss->supp_rates_len;
4790 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4791 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4792 assoc_data->ap_ht_param =
4793 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4795 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4796 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4797 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4798 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4799 sizeof(struct ieee80211_vht_cap));
4801 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4804 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4805 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
4806 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4807 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4809 if (bss->wmm_used && bss->uapsd_supported &&
4810 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4811 assoc_data->uapsd = true;
4812 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4814 assoc_data->uapsd = false;
4815 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4818 if (req->prev_bssid)
4819 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4822 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4823 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4825 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4826 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4829 if (req->flags & ASSOC_REQ_USE_RRM)
4830 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4832 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4834 if (req->crypto.control_port)
4835 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4837 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4839 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4840 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4841 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4844 /* kick off associate process */
4846 ifmgd->assoc_data = assoc_data;
4847 ifmgd->dtim_period = 0;
4848 ifmgd->have_beacon = false;
4850 /* override HT/VHT configuration only if the AP and we support it */
4851 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4852 struct ieee80211_sta_ht_cap sta_ht_cap;
4854 if (req->flags & ASSOC_REQ_DISABLE_HT)
4857 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4858 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4860 /* check for 40 MHz disable override */
4861 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4862 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4863 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4866 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4867 req->flags & ASSOC_REQ_DISABLE_VHT)
4871 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4872 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4873 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4876 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4877 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4879 err = ieee80211_prep_connection(sdata, req->bss, true, override);
4884 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4886 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
4889 * Wait up to one beacon interval ...
4890 * should this be more if we miss one?
4892 sdata_info(sdata, "waiting for beacon from %pM\n",
4894 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4895 assoc_data->timeout_started = true;
4896 assoc_data->need_beacon = true;
4897 } else if (beacon_ies) {
4898 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4903 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4904 const struct ieee80211_tim_ie *tim;
4905 tim = (void *)(tim_ie + 2);
4906 ifmgd->dtim_period = tim->dtim_period;
4907 dtim_count = tim->dtim_count;
4909 ifmgd->have_beacon = true;
4910 assoc_data->timeout = jiffies;
4911 assoc_data->timeout_started = true;
4913 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
4914 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4915 sdata->vif.bss_conf.sync_device_ts =
4916 bss->device_ts_beacon;
4917 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4920 assoc_data->timeout = jiffies;
4921 assoc_data->timeout_started = true;
4925 run_again(sdata, assoc_data->timeout);
4927 if (bss->corrupt_data) {
4928 char *corrupt_type = "data";
4929 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4930 if (bss->corrupt_data &
4931 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4932 corrupt_type = "beacon and probe response";
4934 corrupt_type = "beacon";
4935 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4936 corrupt_type = "probe response";
4937 sdata_info(sdata, "associating with AP with corrupt %s\n",
4943 eth_zero_addr(ifmgd->bssid);
4944 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4945 ifmgd->assoc_data = NULL;
4951 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4952 struct cfg80211_deauth_request *req)
4954 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4955 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4956 bool tx = !req->local_state_change;
4958 if (ifmgd->auth_data &&
4959 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4961 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4962 req->bssid, req->reason_code,
4963 ieee80211_get_reason_code_string(req->reason_code));
4965 drv_mgd_prepare_tx(sdata->local, sdata);
4966 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4967 IEEE80211_STYPE_DEAUTH,
4968 req->reason_code, tx,
4970 ieee80211_destroy_auth_data(sdata, false);
4971 ieee80211_report_disconnect(sdata, frame_buf,
4972 sizeof(frame_buf), true,
4978 if (ifmgd->associated &&
4979 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4981 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4982 req->bssid, req->reason_code,
4983 ieee80211_get_reason_code_string(req->reason_code));
4985 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4986 req->reason_code, tx, frame_buf);
4987 ieee80211_report_disconnect(sdata, frame_buf,
4988 sizeof(frame_buf), true,
4996 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4997 struct cfg80211_disassoc_request *req)
4999 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5001 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5004 * cfg80211 should catch this ... but it's racy since
5005 * we can receive a disassoc frame, process it, hand it
5006 * to cfg80211 while that's in a locked section already
5007 * trying to tell us that the user wants to disconnect.
5009 if (ifmgd->associated != req->bss)
5013 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5014 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5016 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5017 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5018 req->reason_code, !req->local_state_change,
5021 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5027 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5032 * Make sure some work items will not run after this,
5033 * they will not do anything but might not have been
5034 * cancelled when disconnecting.
5036 cancel_work_sync(&ifmgd->monitor_work);
5037 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5038 cancel_work_sync(&ifmgd->request_smps_work);
5039 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5040 cancel_work_sync(&ifmgd->chswitch_work);
5041 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5044 if (ifmgd->assoc_data) {
5045 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5046 ieee80211_destroy_assoc_data(sdata, false);
5047 cfg80211_assoc_timeout(sdata->dev, bss);
5049 if (ifmgd->auth_data)
5050 ieee80211_destroy_auth_data(sdata, false);
5051 spin_lock_bh(&ifmgd->teardown_lock);
5052 if (ifmgd->teardown_skb) {
5053 kfree_skb(ifmgd->teardown_skb);
5054 ifmgd->teardown_skb = NULL;
5055 ifmgd->orig_teardown_skb = NULL;
5057 spin_unlock_bh(&ifmgd->teardown_lock);
5058 del_timer_sync(&ifmgd->timer);
5059 sdata_unlock(sdata);
5062 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5063 enum nl80211_cqm_rssi_threshold_event rssi_event,
5066 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5068 trace_api_cqm_rssi_notify(sdata, rssi_event);
5070 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5072 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5074 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5076 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5078 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5080 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5082 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);